--- OA_place: publisher OA_type: hybrid PlanS_conform: '1' _id: '14703' abstract: - lang: eng text: We present a discretization of the dynamic optimal transport problem for which we can obtain the convergence rate for the value of the transport cost to its continuous value when the temporal and spatial stepsize vanish. This convergence result does not require any regularity assumption on the measures, though experiments suggest that the rate is not sharp. Via an analysis of the duality gap we also obtain the convergence rates for the gradient of the optimal potentials and the velocity field under mild regularity assumptions. To obtain such rates we discretize the dual formulation of the dynamic optimal transport problem and use the mature literature related to the error due to discretizing the Hamilton-Jacobi equation. acknowledgement: 'The authors would like to thank Chris Wojtan for his continuous support and several interesting discussions. Part of this research was performed during two visits: one of SI to the BIDSA research center at Bocconi University, and one of HL to the Institute of Science and Technology Austria. Both host institutions are warmly acknowledged for the hospitality. HL is partially supported by the MUR-Prin 2022-202244A7YL “Gradient Flows and Non-Smooth Geometric Structures with Applications to Optimization and Machine Learning”, funded by the European Union - Next Generation EU. SI is supported in part by ERC Consolidator Grant 101045083 “CoDiNA” funded by the European Research Council. Open access funding provided by Institute of Science and Technology (IST Austria).' article_processing_charge: Yes (via OA deal) article_type: original arxiv: 1 author: - first_name: Sadashige full_name: Ishida, Sadashige id: 6F7C4B96-A8E9-11E9-A7CA-09ECE5697425 last_name: Ishida orcid: 0000-0002-3121-3100 - first_name: Hugo full_name: Lavenant, Hugo last_name: Lavenant citation: ama: Ishida S, Lavenant H. Quantitative convergence of a discretization of dynamic optimal transport using the dual formulation. Foundations of Computational Mathematics. 2026;26:349-384. doi:10.1007/s10208-024-09686-3 apa: Ishida, S., & Lavenant, H. (2026). Quantitative convergence of a discretization of dynamic optimal transport using the dual formulation. Foundations of Computational Mathematics. Springer Nature. https://doi.org/10.1007/s10208-024-09686-3 chicago: Ishida, Sadashige, and Hugo Lavenant. “Quantitative Convergence of a Discretization of Dynamic Optimal Transport Using the Dual Formulation.” Foundations of Computational Mathematics. Springer Nature, 2026. https://doi.org/10.1007/s10208-024-09686-3. ieee: S. Ishida and H. Lavenant, “Quantitative convergence of a discretization of dynamic optimal transport using the dual formulation,” Foundations of Computational Mathematics, vol. 26. Springer Nature, pp. 349–384, 2026. ista: Ishida S, Lavenant H. 2026. Quantitative convergence of a discretization of dynamic optimal transport using the dual formulation. Foundations of Computational Mathematics. 26, 349–384. mla: Ishida, Sadashige, and Hugo Lavenant. “Quantitative Convergence of a Discretization of Dynamic Optimal Transport Using the Dual Formulation.” Foundations of Computational Mathematics, vol. 26, Springer Nature, 2026, pp. 349–84, doi:10.1007/s10208-024-09686-3. short: S. Ishida, H. Lavenant, Foundations of Computational Mathematics 26 (2026) 349–384. corr_author: '1' das_tickbox: '0' date_created: 2023-12-21T10:14:37Z date_published: 2026-02-01T00:00:00Z date_updated: 2026-10-02T11:17:26Z day: '01' ddc: - '000' department: - _id: GradSch - _id: ChWo doi: 10.1007/s10208-024-09686-3 external_id: arxiv: - '2312.12213' isi: - '001352503300001' file: - access_level: open_access checksum: 30671f88e792e8b75ae3e698ac4c131c content_type: application/pdf creator: dernst date_created: 2026-07-23T05:37:52Z date_updated: 2026-07-23T05:37:52Z file_id: '22384' file_name: 2026_FoundCompMath_Ishida.pdf file_size: 1240012 relation: main_file success: 1 file_date_updated: 2026-07-23T05:37:52Z fulldoi: https://doi.org/10.1007/s10208-024-09686-3 has_accepted_license: '1' intvolume: ' 26' isi: 1 keyword: - Optimal transport - Hamilton-Jacobi equation - convex optimization language: - iso: eng month: '02' oa: 1 oa_version: Published Version page: 349-384 project: - _id: 34bc2376-11ca-11ed-8bc3-9a3b3961a088 grant_number: '101045083' name: Computational Discovery of Numerical Algorithms for Animation and Simulation of Natural Phenomena publication: Foundations of Computational Mathematics publication_identifier: eissn: - 1615-3383 issn: - 1615-3375 publication_status: published publisher: Springer Nature quality_controlled: '1' researchdata_availability: no scopus_import: '1' status: public supplementarymaterial: no title: Quantitative convergence of a discretization of dynamic optimal transport using the dual formulation tmp: image: /images/cc_by.png legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0) short: CC BY (4.0) type: journal_article user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345 volume: 26 year: '2026' ... --- OA_place: publisher _id: '22804' abstract: - lang: eng text: 'Embryo cleavage — a series of rapid, reductive cell divisions — is the first morphogenetic movement following fertilisation. It lays the foundation for subsequent developmental events, including gastrulation, germ layer specification, organogenesis, and the establishment of the overall body plan. Two major modes of cleavage exist in the animal kingdom: holoblastic (complete) and meroblastic (incomplete) cleavage. Because holoblastic cleavage resembles canonical cytokinesis, its biochemical and mechanical basis has been extensively studied — an annular contractile ring forms at the equator and constricts in a purse-string-like manner, leading to the complete separation of two daughter cells. In contrast, although meroblastic cleavage occurs widely across the animal kingdom (e.g. in fish, reptiles, birds, and cephalopod molluscs), its mechanical basis remains largely unclear. During meroblastic cleavage, the cytokinetic furrow forms only at one pole and does not traverse the entire embryo, raising the question of how cytokinesis proceeds in the absence of a closed contractile ring. Moreover, the resulting daughter cells are not fully separated from the underlying yolk compartment, and how these blastomeres are subsequently cellularised remains unknown. This thesis takes the zebrafish as a model organism to address both questions. The first part characterises the biochemical and mechanical mechanisms underlying non-canonical meroblastic cleavage, revealing a two-phase process in which actomyosin cable contraction and cadherin-mediated membrane adhesion act sequentially to drive furrow ingression and invagination. The second part sheds light on the spatiotemporal dynamics by which individual blastomeres become cellularised, and uncovers a previously unrecognised contribution of central blastomeres to the yolk syncytial layer.' acknowledged_ssus: - _id: Bio - _id: LifeSc acknowledgement: "I gratefully acknowledge the NOMIS Stiftung (Project ID 5061.844, Cytoplasmic\r\nself-organization into cell-like compartments as a common guiding principle in\r\nearly animal development) for funding my doctoral studies." alternative_title: - ISTA Thesis article_processing_charge: No author: - first_name: Xin full_name: Tong, Xin id: 50F65CDC-AA30-11E9-A72B-8A12E6697425 last_name: Tong citation: ama: Tong X. Towards a deeper understanding of meroblastic cleavage. 2026. doi:10.15479/AT-ISTA-22804 apa: Tong, X. (2026). Towards a deeper understanding of meroblastic cleavage. Institute of Science and Technology Austria. https://doi.org/10.15479/AT-ISTA-22804 chicago: Tong, Xin. “Towards a Deeper Understanding of Meroblastic Cleavage.” Institute of Science and Technology Austria, 2026. https://doi.org/10.15479/AT-ISTA-22804. ieee: X. Tong, “Towards a deeper understanding of meroblastic cleavage,” Institute of Science and Technology Austria, 2026. ista: Tong X. 2026. Towards a deeper understanding of meroblastic cleavage. Institute of Science and Technology Austria. mla: Tong, Xin. Towards a Deeper Understanding of Meroblastic Cleavage. Institute of Science and Technology Austria, 2026, doi:10.15479/AT-ISTA-22804. short: X. Tong, Towards a Deeper Understanding of Meroblastic Cleavage, Institute of Science and Technology Austria, 2026. corr_author: '1' date_created: 2026-09-04T11:54:20Z date_published: 2026-07-12T00:00:00Z date_updated: 2026-10-05T08:56:10Z day: '12' ddc: - '596' - '532' - '572' degree_awarded: PhD department: - _id: GradSch - _id: CaHe doi: 10.15479/AT-ISTA-22804 doi_confirm: '1' file: - access_level: closed checksum: fdcc187a5a92e785da0eff8936fb127e content_type: application/zip creator: xtong date_created: 2026-09-11T13:04:37Z date_updated: 2026-09-14T08:28:06Z file_id: '22909' file_name: 2026_TONG_Xin_Thesis.zip file_size: 126983933 relation: source_file - access_level: open_access checksum: 23ee39b3f08bccd46acfd332e67f5232 content_type: application/pdf creator: xtong date_created: 2026-09-14T12:30:07Z date_updated: 2026-09-14T12:48:53Z file_id: '22930' file_name: 2026_TONG_Xin_Thesis.pdf file_size: 46855054 relation: main_file file_date_updated: 2026-09-14T12:48:53Z fulldoi: https://doi.org/10.15479/AT-ISTA-22804 has_accepted_license: '1' keyword: - meroblastic cleavage - cytokinesis - active gel theory - embryogenesis - zebrafish - adhesion language: - iso: eng license: https://creativecommons.org/licenses/by-nc/4.0/ month: '07' oa: 1 oa_version: Published Version page: '121' project: - _id: 917c023a-16d5-11f0-9cad-eb5cafc52090 name: Cytoplasmic self-organization into cell-like compartments as a common guiding principle in early animal development publication_identifier: isbn: - 978-3-99078-080-0 issn: - 2663-337X publication_status: published publisher: Institute of Science and Technology Austria related_material: record: - id: '22777' relation: research_data status: public - id: '22807' relation: part_of_dissertation status: public researchdata_availability: upon request status: public supervisor: - first_name: Carl-Philipp J full_name: Heisenberg, Carl-Philipp J id: 39427864-F248-11E8-B48F-1D18A9856A87 last_name: Heisenberg orcid: 0000-0002-0912-4566 title: Towards a deeper understanding of meroblastic cleavage tmp: image: /images/cc_by_nc.png legal_code_url: https://creativecommons.org/licenses/by-nc/4.0/legalcode name: Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC 4.0) short: CC BY-NC (4.0) type: dissertation user_id: 8b945eb4-e2f2-11eb-945a-df72226e66a9 year: '2026' ... --- OA_place: repository _id: '22777' acknowledged_ssus: - _id: Bio - _id: LifeSc article_processing_charge: No author: - first_name: Xin full_name: Tong, Xin id: 50F65CDC-AA30-11E9-A72B-8A12E6697425 last_name: Tong citation: ama: Tong X. Towards a deeper understanding of meroblastic cleavage - supplementary movies. 2026. doi:10.15479/AT-ISTA-22777 apa: Tong, X. (2026). Towards a deeper understanding of meroblastic cleavage - supplementary movies. Institute of Science and Technology Austria. https://doi.org/10.15479/AT-ISTA-22777 chicago: Tong, Xin. “Towards a Deeper Understanding of Meroblastic Cleavage - Supplementary Movies.” Institute of Science and Technology Austria, 2026. https://doi.org/10.15479/AT-ISTA-22777. ieee: X. Tong, “Towards a deeper understanding of meroblastic cleavage - supplementary movies.” Institute of Science and Technology Austria, 2026. ista: Tong X. 2026. Towards a deeper understanding of meroblastic cleavage - supplementary movies, Institute of Science and Technology Austria, 10.15479/AT-ISTA-22777. mla: Tong, Xin. Towards a Deeper Understanding of Meroblastic Cleavage - Supplementary Movies. Institute of Science and Technology Austria, 2026, doi:10.15479/AT-ISTA-22777. short: X. Tong, (2026). corr_author: '1' date_created: 2026-09-03T10:48:15Z date_published: 2026-09-04T00:00:00Z date_updated: 2026-10-05T08:56:09Z day: '4' department: - _id: GradSch - _id: CaHe doi: 10.15479/AT-ISTA-22777 doi_confirm: '1' ec_funded: 1 file: - access_level: open_access checksum: ba2d20babb1a8e437b41c513c4d226a4 content_type: text/plain creator: xtong date_created: 2026-09-03T10:47:23Z date_updated: 2026-09-03T10:47:23Z file_id: '22779' file_name: README.txt file_size: 223 relation: main_file success: 1 - access_level: open_access checksum: 59565d43eca072572e37c81d640b8450 content_type: video/avi creator: xtong date_created: 2026-09-03T10:53:55Z date_updated: 2026-09-03T10:53:55Z file_id: '22780' file_name: Movie S1_brightfield.avi file_size: 1137586 relation: main_file success: 1 - access_level: open_access checksum: 2c0740d4555b308e3248f1695042df7b content_type: video/avi creator: xtong date_created: 2026-09-03T10:58:05Z date_updated: 2026-09-03T10:58:05Z file_id: '22796' file_name: Movie S2_membrane.avi file_size: 2400912 relation: main_file success: 1 - 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access_level: open_access checksum: 343f8d51cd1ff3f8bbdbbc0a86e7117f content_type: video/avi creator: xtong date_created: 2026-09-03T10:57:20Z date_updated: 2026-09-03T10:57:20Z file_id: '22793' file_name: Movie S15_Cdh1_Factin.avi file_size: 3399188 relation: main_file success: 1 - access_level: open_access checksum: a48d888dc7994e54390c55deb0976f5a content_type: video/avi creator: xtong date_created: 2026-09-03T10:57:21Z date_updated: 2026-09-03T10:57:21Z file_id: '22794' file_name: Movie S16_cafree.avi file_size: 1253862 relation: main_file success: 1 - access_level: open_access checksum: ac4790a151352cc72534ec55468acebe content_type: video/avi creator: xtong date_created: 2026-09-03T10:57:22Z date_updated: 2026-09-03T10:57:22Z file_id: '22795' file_name: Movie S17_carhoa.avi file_size: 2268762 relation: main_file success: 1 file_date_updated: 2026-09-03T10:58:05Z fulldoi: https://doi.org/10.15479/AT-ISTA-22777 has_accepted_license: '1' month: '9' oa: 1 oa_version: None project: - _id: 9B861AAC-BA93-11EA-9121-9846C619BF3A name: NOMIS Fellowship Program - _id: 05943252-7A3F-11EA-A408-12923DDC885E call_identifier: H2020 grant_number: '851288' name: Design Principles of Branching Morphogenesis publisher: Institute of Science and Technology Austria related_material: record: - id: '22804' relation: used_in_publication status: public status: public title: Towards a deeper understanding of meroblastic cleavage - supplementary movies tmp: image: /images/cc_by_nc.png legal_code_url: https://creativecommons.org/licenses/by-nc/4.0/legalcode name: Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC 4.0) short: CC BY-NC (4.0) type: research_data user_id: 68b8ca59-c5b3-11ee-8790-cd641c68093d year: '2026' ... --- OA_place: publisher OA_type: hybrid PlanS_conform: '1' _id: '22967' abstract: - lang: eng text: Alkali salts are widely used in solution processing, yet the corresponding cations are often assumed to remain in the liquid phase. Here, we show that alkali ions introduced during the solution synthesis of SnSe are retained through particle isolation and continue to influence the material during subsequent thermal processing, where they shape the evolution of the final polycrystalline material. Different SnSe powders were prepared using Li+, Na+, and K+ precursors, as well as tetramethylammonium (TMA+) precursors as a nonalkali reference for comparison, and all samples were consolidated under identical conditions. Although all three alkali ions were found in the matrix, at grain boundaries, and in segregated nanoscale regions, they partitioned differently and resulted in distinct grain sizes, defect distributions, and therefore transport properties. Li induced the strongest grain size heterogeneity and the lowest energy barriers, Na the best overall balance between carrier concentration and mobility, and K the broadest alkali-rich grain boundary regions along with the strongest interfacial penalty to charge carrier transport. These results show that residual alkali ions are not just remnants of solution synthesis but active determinants of microstructure and thermoelectric performance in SnSe. acknowledged_ssus: - _id: EM-Fac - _id: NanoFab acknowledgement: "ISTA and the Werner Siemens Foundation financially supported this work. The Scientific Service Units (SSU) of ISTA supported this research through resources provided by the Electron Microscopy Facility (EMF), Juan Aguilera Servin from the Nanofabrication facility (NNF). Special acknowledgments to the Ibá\r\nez group for their fruitful discussions and insights. K.M. acknowledges the European Union’s Horizon 2020 research and innovation program under the Marie Skłodowska-Curie grant agreement No. 101034413 and PETRAIII at DESY for the synchrotron X-ray measurements under proposal No. I-20241048 EC. JL is a Serra Húnter Fellow and is grateful to the Academia Excellence program (Generalitat de Catalunya), project PID2024-156765OB-C21 funded by MICIU/AEI/10.13039/501100011033 and the European Regional Development Fund (FEDER), and María de Maeztu Units of Excellence Programme CEX2023-001300 M, funded by MCIN/AEI 10.13039/501100011033. VG and SD acknowledge the use of resources of the National Energy Research Scientific Computing Center, a DOE Office of Science User Facility supported by the Office of Science of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231. Y.L. acknowledges funding from the European Union’s Horizon 2020 research and innovation program under the Marie Sklodowska-Curie grant agreement No. 754411, the National Natural Science Foundation of China (NSFC) (Grants No. 22209034)." article_processing_charge: Yes (via OA deal) article_type: original author: - first_name: Christine full_name: Fiedler, Christine id: bd3fceba-dc74-11ea-a0a7-c17f71817366 last_name: Fiedler - first_name: Sharona full_name: Horta, Sharona id: 03a7e858-01b1-11ec-8b71-99ae6c4a05bc last_name: Horta - first_name: Navita full_name: Navita, Navita id: 6ebe278d-ba0b-11ee-8184-f34cdc671de4 last_name: Navita orcid: 0000-0001-7408-8197 - first_name: Krishnendu full_name: Maji, Krishnendu id: 76bc9e9f-ba0b-11ee-8184-90edabd17a58 last_name: Maji - first_name: Tobias full_name: Kleinhanns, Tobias id: 8BD9DE16-AB3C-11E9-9C8C-2A03E6697425 last_name: Kleinhanns orcid: 0000-0003-1537-7436 - first_name: Jordi full_name: Llorca, Jordi last_name: Llorca - first_name: Qi full_name: Wang, Qi id: 0d37923a-aca1-11ef-951f-fd411b71d5f0 last_name: Wang - first_name: Maria Garcia full_name: Ramon, Maria Garcia id: 1ffff7cd-ed76-11ed-8d5f-be5e7c364eb9 last_name: Ramon - first_name: Sambit full_name: Das, Sambit last_name: Das - first_name: Vikram full_name: Gavini, Vikram last_name: Gavini - first_name: Yu full_name: Liu, Yu id: 2A70014E-F248-11E8-B48F-1D18A9856A87 last_name: Liu orcid: 0000-0001-7313-6740 - first_name: Maria full_name: Ibáñez, Maria id: 43C61214-F248-11E8-B48F-1D18A9856A87 last_name: Ibáñez orcid: 0000-0001-5013-2843 citation: ama: Fiedler C, Horta S, Jakhar N, et al. Alkali ions retained from synthesis govern microstructure and transport in solution-processed SnSe. Chemistry of Materials. 2026;38(18):9323–9332. doi:10.1021/acs.chemmater.6c01284 apa: Fiedler, C., Horta, S., Jakhar, N., Maji, K., Kleinhanns, T., Llorca, J., … Ibáñez, M. (2026). Alkali ions retained from synthesis govern microstructure and transport in solution-processed SnSe. Chemistry of Materials. American Chemical Society. https://doi.org/10.1021/acs.chemmater.6c01284 chicago: Fiedler, Christine, Sharona Horta, Navita Jakhar, Krishnendu Maji, Tobias Kleinhanns, Jordi Llorca, Qi Wang, et al. “Alkali Ions Retained from Synthesis Govern Microstructure and Transport in Solution-Processed SnSe.” Chemistry of Materials. American Chemical Society, 2026. https://doi.org/10.1021/acs.chemmater.6c01284. ieee: C. Fiedler et al., “Alkali ions retained from synthesis govern microstructure and transport in solution-processed SnSe,” Chemistry of Materials, vol. 38, no. 18. American Chemical Society, pp. 9323–9332, 2026. ista: Fiedler C, Horta S, Jakhar N, Maji K, Kleinhanns T, Llorca J, Wang Q, Ramon MG, Das S, Gavini V, Liu Y, Ibáñez M. 2026. Alkali ions retained from synthesis govern microstructure and transport in solution-processed SnSe. Chemistry of Materials. 38(18), 9323–9332. mla: Fiedler, Christine, et al. “Alkali Ions Retained from Synthesis Govern Microstructure and Transport in Solution-Processed SnSe.” Chemistry of Materials, vol. 38, no. 18, American Chemical Society, 2026, pp. 9323–9332, doi:10.1021/acs.chemmater.6c01284. short: C. Fiedler, S. Horta, N. Jakhar, K. Maji, T. Kleinhanns, J. Llorca, Q. Wang, M.G. Ramon, S. Das, V. Gavini, Y. Liu, M. Ibáñez, Chemistry of Materials 38 (2026) 9323–9332. corr_author: '1' das_tickbox: '0' date_created: 2026-09-21T10:33:48Z date_published: 2026-09-22T00:00:00Z date_updated: 2026-10-06T12:16:03Z day: '22' ddc: - '540' department: - _id: MaIb - _id: GradSch - _id: NanoFab doi: 10.1021/acs.chemmater.6c01284 ec_funded: 1 external_id: pmid: - '42787739' file: - access_level: open_access checksum: 15e7866ca4fd57f5526737945651a6f2 content_type: application/pdf creator: dernst date_created: 2026-10-06T12:11:04Z date_updated: 2026-10-06T12:11:04Z file_id: '23063' file_name: 2026_ChemistryMaterials_Fiedler.pdf file_size: 7461570 relation: main_file success: 1 file_date_updated: 2026-10-06T12:11:04Z fulldoi: https://doi.org/10.1021/acs.chemmater.6c01284 has_accepted_license: '1' intvolume: ' 38' issue: '18' language: - iso: eng month: '09' oa: 1 oa_version: Published Version page: 9323–9332 pmid: 1 project: - _id: 9B8F7476-BA93-11EA-9121-9846C619BF3A name: 'HighTE: The Werner Siemens Laboratory for the High Throughput Discovery of Semiconductors for Waste Heat Recovery' - _id: fc2ed2f7-9c52-11eb-aca3-c01059dda49c call_identifier: H2020 grant_number: '101034413' name: 'IST-BRIDGE: International postdoctoral program' - _id: 260C2330-B435-11E9-9278-68D0E5697425 call_identifier: H2020 grant_number: '754411' name: ISTplus - Postdoctoral Fellowships publication: Chemistry of Materials publication_identifier: eissn: - 1520-5002 issn: - 0897-4756 publication_status: published publisher: American Chemical Society quality_controlled: '1' researchdata_availability: no scopus_import: '1' status: public supplementarymaterial: yes title: Alkali ions retained from synthesis govern microstructure and transport in solution-processed SnSe tmp: image: /images/cc_by.png legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0) short: CC BY (4.0) type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 38 year: '2026' ... --- DOAJ_listed: '1' OA_place: publisher OA_type: gold PlanS_conform: '1' _id: '22963' abstract: - lang: eng text: Although studies of tumor invasion have mainly emphasized the evolution of genetic and epigenetic heterogeneity, cellular behaviors also depend on the physical microenvironment. Yet, the tumor microenvironment is both complex and continuously remodeled, making it hard to rigorously test its causal influence on tumor dissemination. Here, we adopted a reductionist approach to studying tumor cell invasion in microengineered environments of tunable patterned geometries. We find that not only the presence of obstacles but more unexpectedly their spatial disorder causes a drastic shift from a collective to a single-cell mode of invasion—comparable in strength to loss of cell-cell adhesion. Combining live-imaging and perturbation experiments with minimal biophysical modeling, we demonstrate that cell dissemination results both from local geometrical constraints and a global integration of spatial disorder over time. We identify generic universality classes of invasion dynamics dependent on environmental geometry, enabling us to identify quantitative physical principles for tumor dissemination. acknowledged_ssus: - _id: Bio - _id: LifeSc acknowledgement: 'We thank all the members of the Hannezo and Sixt groups for fruitful discussions and t. Kato for advice on the experimental setup. We are also thankful for support from the Scientific Service Units (SSU) of IST Austria through resources provided by the imaging and Optics Facility (iOF) and the Lab Support Facility (lSF). We used chatGPt (GPt- 5,OpenAi, 2025) to make minor grammatical and stylistic revisions to the original manuscript, which was written by us. We carefully reviewed and verified all changes and are solely responsible for all scientific content, data, interpretation, and conclusions. Funding: Z.D. has received funding from the Doctoral Programme of the Austrian Academy of Sciences (OeAW):grant agreement 26360. this work was supported by the European Research council (grant ERC- SyG 101071793 to M.S.). E.S. and R.P.J. are supported by the Francis Crick Institute, which receives its core funding from cancer Research UK (cc2040), the UK Medical Research council(cc2040), and the Wellcome trust (cc2040) and the European Research council (ERC Advanced Grant cAn_ORGAniSe, grant agreement number 101019366).' article_number: eaed0587 article_processing_charge: Yes article_type: original author: - first_name: Zuzana full_name: Dunajova, Zuzana id: 4B39F286-F248-11E8-B48F-1D18A9856A87 last_name: Dunajova - first_name: Saren full_name: Tasciyan, Saren id: 4323B49C-F248-11E8-B48F-1D18A9856A87 last_name: Tasciyan orcid: 0000-0003-1671-393X - first_name: Juraj full_name: Majek, Juraj id: 3e6d9473-f38e-11ec-8ae0-c4e05a8aa9e1 last_name: Majek - first_name: Jack full_name: Merrin, Jack id: 4515C308-F248-11E8-B48F-1D18A9856A87 last_name: Merrin orcid: 0000-0001-5145-4609 - first_name: Robert P. full_name: Jenkins, Robert P. last_name: Jenkins - first_name: Erik full_name: Sahai, Erik last_name: Sahai - first_name: Michael K full_name: Sixt, Michael K id: 41E9FBEA-F248-11E8-B48F-1D18A9856A87 last_name: Sixt orcid: 0000-0002-6620-9179 - first_name: Edouard B full_name: Hannezo, Edouard B id: 3A9DB764-F248-11E8-B48F-1D18A9856A87 last_name: Hannezo orcid: 0000-0001-6005-1561 citation: ama: Dunajova Z, Tasciyan S, Majek J, et al. Substrate heterogeneity promotes cancer cell dissemination through interface roughening. Science Advances. 2026;12(37). doi:10.1126/sciadv.aed0587 apa: Dunajova, Z., Tasciyan, S., Majek, J., Merrin, J., Jenkins, R. P., Sahai, E., … Hannezo, E. B. (2026). Substrate heterogeneity promotes cancer cell dissemination through interface roughening. Science Advances. AAAS. https://doi.org/10.1126/sciadv.aed0587 chicago: Dunajova, Zuzana, Saren Tasciyan, Juraj Majek, Jack Merrin, Robert P. Jenkins, Erik Sahai, Michael K Sixt, and Edouard B Hannezo. “Substrate Heterogeneity Promotes Cancer Cell Dissemination through Interface Roughening.” Science Advances. AAAS, 2026. https://doi.org/10.1126/sciadv.aed0587. ieee: Z. Dunajova et al., “Substrate heterogeneity promotes cancer cell dissemination through interface roughening,” Science Advances, vol. 12, no. 37. AAAS, 2026. ista: Dunajova Z, Tasciyan S, Majek J, Merrin J, Jenkins RP, Sahai E, Sixt MK, Hannezo EB. 2026. Substrate heterogeneity promotes cancer cell dissemination through interface roughening. Science Advances. 12(37), eaed0587. mla: Dunajova, Zuzana, et al. “Substrate Heterogeneity Promotes Cancer Cell Dissemination through Interface Roughening.” Science Advances, vol. 12, no. 37, eaed0587, AAAS, 2026, doi:10.1126/sciadv.aed0587. short: Z. Dunajova, S. Tasciyan, J. Majek, J. Merrin, R.P. Jenkins, E. Sahai, M.K. Sixt, E.B. Hannezo, Science Advances 12 (2026). corr_author: '1' das_tickbox: '1' dataavailabilitystatement: ' All data and code needed to evaluate and reproduce the results in the paper are present in the paper and/or the Supplementary Materials and the associated data and code repositories. Source data underlying all figures and supplementary figures have been deposited in a Zenodo repository (DOi: 10.5281/zenodo.21718217) and will be made publicly available upon publication. custom simulation and analysis codes used in this study are available at https://codeocean.com/capsule/1237446/tree. no unique biological materials were generated in this study. Microfluidic mask designs generated for this work are available from the corresponding authors upon reasonable request.' date_created: 2026-09-20T22:01:48Z date_published: 2026-09-09T00:00:00Z date_updated: 2026-10-06T11:36:34Z day: '09' ddc: - '570' department: - _id: EdHa - _id: MiSi - _id: GradSch - _id: AnSa - _id: NanoFab doi: 10.1126/sciadv.aed0587 external_id: pmid: - '42715298' file: - access_level: open_access checksum: 79f419b659650a39b3dfa58c782690a8 content_type: application/pdf creator: dernst date_created: 2026-10-06T11:30:48Z date_updated: 2026-10-06T11:30:48Z file_id: '23062' file_name: 2026_ScienceAdv_Dunajova.pdf file_size: 11691064 relation: main_file success: 1 file_date_updated: 2026-10-06T11:30:48Z fulldoi: https://doi.org/10.1126/sciadv.aed0587 has_accepted_license: '1' intvolume: ' 12' issue: '37' language: - iso: eng month: '09' oa: 1 oa_version: Published Version pmid: 1 project: - _id: 34d75525-11ca-11ed-8bc3-89b6307fee9d grant_number: '26360' name: Motile active matter models of migrating cells and chiral filaments - _id: bd91e723-d553-11ed-ba76-fe7eeb2185fd grant_number: '101071793' name: 'Pushing from within: Control of cell shape, integrity and motility by cytoskeletal pushing forces' publication: Science Advances publication_identifier: eissn: - 2375-2548 publication_status: published publisher: AAAS quality_controlled: '1' related_material: record: - id: '21427' relation: earlier_version status: public researchdata_availability: yes scopus_import: '1' status: public supplementarymaterial: no title: Substrate heterogeneity promotes cancer cell dissemination through interface roughening tmp: image: /images/cc_by.png legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0) short: CC BY (4.0) type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 12 year: '2026' ... --- OA_place: publisher OA_type: gold PlanS_conform: '1' _id: '22971' abstract: - lang: eng text: "We study the problem of minimizing metric distortion in multi-winner elections, where a committee of size k is selected from a set of candidates based on voters’ ordinal preferences. We assume that voters and candidates are embedded on a line metric, and social cost is determined by the underlying metric distances.\r\nThe distortion of a voting rule is the worst-case ratio between the social cost of the elected committee and an optimal committee. Previous work has focused on the q-cost model, in which a voter’s cost is given by the distance to their qth closest committee member. Here, we study the additive cost, where a voter’s cost is the sum of distances to all committee members.\r\nWe introduce the Polar Comparison Rule and analyze its distortion under utilitarian additive cost. We show that it achieves a distortion upper bound of almost 2.33 for all committee sizes k > 4, improving upon the previously best-known upper bound of 3. Moreover, for k = 2 and k = 3, we establish tight distortion bounds of 2.41 and 2.33, respectively. We also derive lower bounds that depend on the parity of k and analyze the behavior of distortion for small and large committee sizes. Finally, we extend our results to the egalitarian additive cost." article_number: '3843232' article_processing_charge: Yes article_type: original author: - first_name: Negar full_name: Babashah, Negar id: 95f4864e-6ec9-11f0-b3f6-b8422c64859e last_name: Babashah orcid: 0009-0007-0203-9725 - first_name: Hasti full_name: Karimi, Hasti last_name: Karimi - first_name: Masoud full_name: Seddighin, Masoud last_name: Seddighin - first_name: Golnoosh full_name: Shahkarami, Golnoosh last_name: Shahkarami citation: ama: 'Babashah N, Karimi H, Seddighin M, Shahkarami G. Distortion of multi-winner elections on the line metric: The polar comparison rule. ACM Transactions on Economics and Computation. 2026. doi:10.1145/3843232' apa: 'Babashah, N., Karimi, H., Seddighin, M., & Shahkarami, G. (2026). Distortion of multi-winner elections on the line metric: The polar comparison rule. ACM Transactions on Economics and Computation. ACM. https://doi.org/10.1145/3843232' chicago: 'Babashah, Negar, Hasti Karimi, Masoud Seddighin, and Golnoosh Shahkarami. “Distortion of Multi-Winner Elections on the Line Metric: The Polar Comparison Rule.” ACM Transactions on Economics and Computation. ACM, 2026. https://doi.org/10.1145/3843232.' ieee: 'N. Babashah, H. Karimi, M. Seddighin, and G. Shahkarami, “Distortion of multi-winner elections on the line metric: The polar comparison rule,” ACM Transactions on Economics and Computation. ACM, 2026.' ista: 'Babashah N, Karimi H, Seddighin M, Shahkarami G. 2026. Distortion of multi-winner elections on the line metric: The polar comparison rule. ACM Transactions on Economics and Computation., 3843232.' mla: 'Babashah, Negar, et al. “Distortion of Multi-Winner Elections on the Line Metric: The Polar Comparison Rule.” ACM Transactions on Economics and Computation, 3843232, ACM, 2026, doi:10.1145/3843232.' short: N. Babashah, H. Karimi, M. Seddighin, G. Shahkarami, ACM Transactions on Economics and Computation (2026). corr_author: '1' date_created: 2026-09-22T05:37:33Z date_published: 2026-09-01T00:00:00Z date_updated: 2026-10-06T12:38:17Z day: '01' ddc: - '000' department: - _id: GradSch doi: 10.1145/3843232 fulldoi: https://doi.org/10.1145/3843232 has_accepted_license: '1' language: - iso: eng main_file_link: - open_access: '1' url: https://doi.org/10.1145/3843232 month: '09' oa: 1 oa_version: Published Version publication: ACM Transactions on Economics and Computation publication_identifier: eissn: - 2167-8383 issn: - 2167-8375 publication_status: epub_ahead publisher: ACM quality_controlled: '1' scopus_import: '1' status: public title: 'Distortion of multi-winner elections on the line metric: The polar comparison rule' tmp: image: /images/cc_by.png legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0) short: CC BY (4.0) type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 year: '2026' ... --- OA_place: publisher OA_type: hybrid PlanS_conform: '1' _id: '22998' abstract: - lang: eng text: Balancing selection, a form of selection that maintains genetic diversity, is difficult to detect, and the importance of balancing selection for the maintenance of genetic variation may be larger than often assumed. We model the possibility that the diversity-promoting effects of balancing selection extend to other loci that show sign epistasis with a locus under balancing selection. Rather than focusing on overdominance, as was done in previous efforts, we explore the effects of negative frequency dependence and show that this has important effects on the conditions under which the diversity-promoting effect of epistasis can occur in diploids. Our results show that not only recombination rate but also the dominance of sign epistasis are key parameters that determine the maintenance of polymorphism beyond the locus under direct balancing selection. We suggest that the effect we explore may play a significant role, especially when balancing selection acts on major effect loci. acknowledgement: This work was funded by grants from the Swedish Research Council (2023-03730 to G.A.) and the DOC fellowship from the Austrian Academy of Science (26293 to K.K.). We thank L. Rowe for valuable discussions. article_processing_charge: Yes (via OA deal) article_type: original author: - first_name: Kseniia full_name: Khudiakova, Kseniia id: 4E6DC800-AE37-11E9-AC72-31CAE5697425 last_name: Khudiakova orcid: 0000-0002-6246-1465 - first_name: Nicholas H full_name: Barton, Nicholas H id: 4880FE40-F248-11E8-B48F-1D18A9856A87 last_name: Barton orcid: 0000-0002-8548-5240 - first_name: Göran full_name: Arnqvist, Göran last_name: Arnqvist biorxivid: 1 citation: ama: Khudiakova K, Barton NH, Arnqvist G. Sign epistasis extends the effects of balancing selection on genetic diversity. Theoretical Population Biology. 2026;172:48-55. doi:10.1016/j.tpb.2026.09.001 apa: Khudiakova, K., Barton, N. H., & Arnqvist, G. (2026). Sign epistasis extends the effects of balancing selection on genetic diversity. Theoretical Population Biology. https://doi.org/10.1016/j.tpb.2026.09.001 chicago: Khudiakova, Kseniia, Nicholas H Barton, and Göran Arnqvist. “Sign Epistasis Extends the Effects of Balancing Selection on Genetic Diversity.” Theoretical Population Biology, 2026. https://doi.org/10.1016/j.tpb.2026.09.001. ieee: K. Khudiakova, N. H. Barton, and G. Arnqvist, “Sign epistasis extends the effects of balancing selection on genetic diversity,” Theoretical Population Biology, vol. 172. pp. 48–55, 2026. ista: Khudiakova K, Barton NH, Arnqvist G. 2026. Sign epistasis extends the effects of balancing selection on genetic diversity. Theoretical Population Biology. 172, 48–55. mla: Khudiakova, Kseniia, et al. “Sign Epistasis Extends the Effects of Balancing Selection on Genetic Diversity.” Theoretical Population Biology, vol. 172, 2026, pp. 48–55, doi:10.1016/j.tpb.2026.09.001. short: K. Khudiakova, N.H. Barton, G. Arnqvist, Theoretical Population Biology 172 (2026) 48–55. corr_author: '1' das_tickbox: '1' dataavailabilitystatement: The Python code used for the numerical analyses is available online at https://github.com/khudyakovaks/Sign-epistasis-extends-the-effects-of-balancing-selection-on-genetic-diversity. date_created: 2026-09-27T22:01:51Z date_published: 2026-09-17T00:00:00Z date_updated: 2026-10-07T06:38:02Z day: '17' ddc: - '500' - '570' department: - _id: JaMa - _id: GradSch - _id: NiBa doi: 10.1016/j.tpb.2026.09.001 external_id: biorxivid: - 10.1101/2025.04.09.647826 pmid: - '42722132' fulldoi: https://doi.org/10.1016/j.tpb.2026.09.001 has_accepted_license: '1' intvolume: ' 172' keyword: - Sign epistasis - Balancing selection - Within-population genetic variation language: - iso: eng main_file_link: - open_access: '1' url: https://doi.org/10.1016/j.tpb.2026.09.001 month: '09' oa: 1 oa_version: Published Version page: 48-55 pmid: 1 project: - _id: 34d33d68-11ca-11ed-8bc3-ec13763c0ca8 grant_number: '26293' name: The impact of deleterious mutations on small populations publication: Theoretical Population Biology publication_identifier: eissn: - 1096-0325 issn: - 0040-5809 publication_status: epub_ahead quality_controlled: '1' related_material: record: - id: '21968' relation: earlier_version status: public researchdata_availability: no scopus_import: '1' status: public supplementarymaterial: yes title: Sign epistasis extends the effects of balancing selection on genetic diversity tmp: image: /images/cc_by.png legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0) short: CC BY (4.0) type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 172 year: '2026' ... --- OA_place: publisher OA_type: hybrid PlanS_conform: '1' _id: '23001' abstract: - lang: eng text: "A famous conjecture by Itai and Zehavi states that, for every \U0001D451\r\n-vertex-connected graph \U0001D43A\r\n and every vertex \U0001D45F\r\n in \U0001D43A\r\n, there are \U0001D451\r\n spanning trees of \U0001D43A\r\n such that, for every vertex \U0001D463\r\n in \U0001D43A ∖{\U0001D45F}\r\n, the paths between \U0001D45F\r\n and \U0001D463\r\n in different trees are internally vertex-disjoint. We show that with high probability the Itai–Zehavi conjecture holds asymptotically for the Erdős–Rényi random graph \U0001D43A⁡(\U0001D45B,\U0001D45D)\r\n when \U0001D45B⁢\U0001D45D =\U0001D714⁡(log⁡\U0001D45B)\r\n and for random regular graphs \U0001D43A⁡(\U0001D45B,\U0001D451)\r\n when \U0001D451 =\U0001D714⁡(log⁡\U0001D45B)\r\n. Moreover, we essentially confirm the conjecture up to a constant factor for sparser random regular graphs. This answers a question of Draganić and Krivelevich positively. Our proof makes use of recent developments on sprinkling techniques in random regular graphs." acknowledgement: "Hollom was supported by the Internal Graduate Studentship of Trinity College, Cambridge. Mond was supported by UK Research and Innovation grant MR/W007320/2. Wang was supported by the ERC Starting Grant “RANDSTRUCT” No. 101076777. Lichev was supported by the Austrian Science Fund (FWF) [10.55776/ESP624]. For open access purposes, the authors have applied a CC BY public copyright license to any author-accepted manuscript version arising from this submission. Open Access funding provided by Technische Universitat Wien.\r\n\r\nPart of this research was done during a visit of the fourth author to IST Austria. We thank IST Austria for its hospitality. We also thank the anonymous referees for their comments and suggestions. Open Access funding provided by Technische Universitat Wien. This work was supported by the European Research Council, UK Research and Innovation, the Austrian Science Fund, and Trinity College." article_number: e70095 article_processing_charge: Yes (via OA deal) article_type: original arxiv: 1 author: - first_name: Lawrence full_name: Hollom, Lawrence last_name: Hollom - first_name: Lyuben full_name: Lichev, Lyuben id: 9aa8388e-d003-11ee-8458-c4c1d7447977 last_name: Lichev - first_name: Adva full_name: Mond, Adva last_name: Mond - first_name: Julien full_name: Portier, Julien last_name: Portier - first_name: Yiting full_name: Wang, Yiting id: 1917d194-076e-11ed-97cd-837255f88785 last_name: Wang citation: ama: Hollom L, Lichev L, Mond A, Portier J, Wang Y. Approximate Itai–Zehavi conjecture for random graphs. Random Structures and Algorithms. 2026;69(2). doi:10.1002/rsa.70095 apa: Hollom, L., Lichev, L., Mond, A., Portier, J., & Wang, Y. (2026). Approximate Itai–Zehavi conjecture for random graphs. Random Structures and Algorithms. Wiley. https://doi.org/10.1002/rsa.70095 chicago: Hollom, Lawrence, Lyuben Lichev, Adva Mond, Julien Portier, and Yiting Wang. “Approximate Itai–Zehavi Conjecture for Random Graphs.” Random Structures and Algorithms. Wiley, 2026. https://doi.org/10.1002/rsa.70095. ieee: L. Hollom, L. Lichev, A. Mond, J. Portier, and Y. Wang, “Approximate Itai–Zehavi conjecture for random graphs,” Random Structures and Algorithms, vol. 69, no. 2. Wiley, 2026. ista: Hollom L, Lichev L, Mond A, Portier J, Wang Y. 2026. Approximate Itai–Zehavi conjecture for random graphs. Random Structures and Algorithms. 69(2), e70095. mla: Hollom, Lawrence, et al. “Approximate Itai–Zehavi Conjecture for Random Graphs.” Random Structures and Algorithms, vol. 69, no. 2, e70095, Wiley, 2026, doi:10.1002/rsa.70095. short: L. Hollom, L. Lichev, A. Mond, J. Portier, Y. Wang, Random Structures and Algorithms 69 (2026). das_tickbox: '0' date_created: 2026-09-27T22:01:52Z date_published: 2026-09-01T00:00:00Z date_updated: 2026-10-07T07:13:30Z day: '01' ddc: - '500' department: - _id: MaKw - _id: GradSch doi: 10.1002/rsa.70095 external_id: arxiv: - '2506.23970' file: - access_level: open_access checksum: 9a786460a47542f24576e947987e558a content_type: application/pdf creator: dernst date_created: 2026-10-07T07:10:43Z date_updated: 2026-10-07T07:10:43Z file_id: '23068' file_name: 2026_RandomStructAlgorithms_Hollom.pdf file_size: 457581 relation: main_file success: 1 file_date_updated: 2026-10-07T07:10:43Z fulldoi: https://doi.org/10.1002/rsa.70095 has_accepted_license: '1' intvolume: ' 69' issue: '2' language: - iso: eng month: '09' oa: 1 oa_version: Published Version project: - _id: bd95085b-d553-11ed-ba76-e55d3349be45 grant_number: '101076777' name: Randomness and structure in combinatorics publication: Random Structures and Algorithms publication_identifier: eissn: - 1098-2418 issn: - 1042-9832 publication_status: published publisher: Wiley quality_controlled: '1' researchdata_availability: no scopus_import: '1' status: public supplementarymaterial: yes title: Approximate Itai–Zehavi conjecture for random graphs tmp: image: /images/cc_by.png legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0) short: CC BY (4.0) type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 69 year: '2026' ... --- OA_embargo: '6' OA_place: publisher _id: '23033' acknowledged_ssus: - _id: M-Shop - _id: Bio acknowledgement: "This project has received funding from the European Research Council (ERC) under \r\nthe European Union’s Horizon 2020 research and innovation programme (Grant \r\nagreements No. 949120 and No. 805041). This research was supported by the \r\nScientific Service Units of The Institute of Science and Technology Austria (ISTA) \r\nthrough resources provided by the Miba Machine Shop and the Imaging & Optics \r\nFacility. " alternative_title: - ISTA Thesis article_processing_charge: No author: - first_name: Andrea full_name: Stöllner, Andrea id: 4bdcf7f6-eb97-11eb-a6c2-9981bbdc3bed last_name: Stöllner orcid: 0000-0002-0464-8440 citation: ama: Stöllner A. Microscale electrical behavior of highly charged individual aerosol particles using optical tweezers. 2026. doi:10.15479/AT-ISTA-23033 apa: Stöllner, A. (2026). Microscale electrical behavior of highly charged individual aerosol particles using optical tweezers. Institute of Science and Technology Austria. https://doi.org/10.15479/AT-ISTA-23033 chicago: Stöllner, Andrea. “Microscale Electrical Behavior of Highly Charged Individual Aerosol Particles Using Optical Tweezers.” Institute of Science and Technology Austria, 2026. https://doi.org/10.15479/AT-ISTA-23033. ieee: A. Stöllner, “Microscale electrical behavior of highly charged individual aerosol particles using optical tweezers,” Institute of Science and Technology Austria, 2026. ista: Stöllner A. 2026. Microscale electrical behavior of highly charged individual aerosol particles using optical tweezers. Institute of Science and Technology Austria. mla: Stöllner, Andrea. Microscale Electrical Behavior of Highly Charged Individual Aerosol Particles Using Optical Tweezers. Institute of Science and Technology Austria, 2026, doi:10.15479/AT-ISTA-23033. short: A. Stöllner, Microscale Electrical Behavior of Highly Charged Individual Aerosol Particles Using Optical Tweezers, Institute of Science and Technology Austria, 2026. corr_author: '1' date_created: 2026-10-02T10:03:57Z date_published: 2026-10-02T00:00:00Z date_updated: 2026-10-09T11:09:10Z day: '02' ddc: - '530' degree_awarded: PhD department: - _id: GradSch - _id: ScWa - _id: CaMu doi: 10.15479/AT-ISTA-23033 doi_confirm: '1' ec_funded: 1 file: - access_level: closed checksum: 4c294f690c2eabdbb0f9215fb6e75fa0 content_type: application/vnd.openxmlformats-officedocument.wordprocessingml.document creator: astoelln date_created: 2026-10-02T13:31:50Z date_updated: 2026-10-02T13:31:50Z file_id: '23040' file_name: 2026_Stoellner_Andrea_Thesis.docx file_size: 8706369 relation: source_file - access_level: closed checksum: 410066c4b83297091699d5c324676d9e content_type: application/pdf creator: cchlebak date_created: 2026-10-05T12:02:57Z date_updated: 2026-10-05T12:06:04Z embargo: 2027-04-05 embargo_to: open_access file_id: '23059' file_name: 2026_Stoellner_Andrea_Thesis.pdf file_size: 4131543 relation: main_file file_date_updated: 2026-10-05T12:06:04Z fulldoi: https://doi.org/10.15479/AT-ISTA-23033 has_accepted_license: '1' keyword: - aerosol physics - electrostatics - optics - optical tweezers - atmospheric electricity language: - iso: eng month: '10' oa_version: Published Version page: '88' project: - _id: 0aa60e99-070f-11eb-9043-a6de6bdc3afa call_identifier: H2020 grant_number: '949120' name: 'Tribocharge: a multi-scale approach to an enduring problem in physics' - _id: 629205d8-2b32-11ec-9570-e1356ff73576 call_identifier: H2020 grant_number: '805041' name: Organization of CLoUdS, and implications of Tropical cyclones and for the Energetics of the tropics, in current and waRming climate publication_identifier: issn: - 2663-337X publication_status: published publisher: Institute of Science and Technology Austria related_material: record: - id: '20705' relation: part_of_dissertation status: public - id: '23038' relation: part_of_dissertation status: public status: public supervisor: - first_name: Scott R full_name: Waitukaitis, Scott R id: 3A1FFC16-F248-11E8-B48F-1D18A9856A87 last_name: Waitukaitis orcid: 0000-0002-2299-3176 - first_name: Caroline J full_name: Muller, Caroline J id: f978ccb0-3f7f-11eb-b193-b0e2bd13182b last_name: Muller orcid: 0000-0001-5836-5350 title: Microscale electrical behavior of highly charged individual aerosol particles using optical tweezers tmp: image: /images/cc_by.png legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0) short: CC BY (4.0) type: dissertation user_id: 8b945eb4-e2f2-11eb-945a-df72226e66a9 year: '2026' ... --- OA_type: closed access _id: '23055' abstract: - lang: eng text: We report progress toward strong electric-dipole coupling of polar molecules in cryogenic crystals to superconducting microwave resonators for hybrid quantum computing. We detect crystal-shifted inversion transitions of ammonia in neon using a multimode resonator. alternative_title: - Technical Digest Series article_number: QM4D.3 article_processing_charge: No author: - first_name: Nikolaus full_name: De Zordo, Nikolaus last_name: De Zordo - first_name: Carla N full_name: Borja Espinosa, Carla N id: 18777c01-896a-11ed-bdf8-e4851dc07d16 last_name: Borja Espinosa - first_name: Ragheed full_name: Al Hyder, Ragheed id: d1c405be-ae15-11ed-8510-ccf53278162e last_name: Al Hyder - first_name: Jinglun full_name: Li, Jinglun id: ff19510a-0d2c-11ef-b018-c338ad2f4325 last_name: Li - first_name: Wenzel full_name: Kersten, Wenzel last_name: Kersten - first_name: Andrew full_name: Kanagin, Andrew last_name: Kanagin - first_name: Georgios full_name: Koutentakis, Georgios id: d7b23d3a-9e21-11ec-b482-f76739596b95 last_name: Koutentakis - first_name: Florian full_name: Kluibenschedl, Florian id: 7499e70e-eb2c-11ec-b98b-f925648bc9d9 last_name: Kluibenschedl orcid: 0000-0003-4695-5526 - first_name: Mikhail full_name: Lemeshko, Mikhail id: 37CB05FA-F248-11E8-B48F-1D18A9856A87 last_name: Lemeshko orcid: 0000-0002-6990-7802 - first_name: Johannes M full_name: Fink, Johannes M id: 4B591CBA-F248-11E8-B48F-1D18A9856A87 last_name: Fink orcid: 0000-0001-8112-028X - first_name: Jörg full_name: Schmiedmayer, Jörg last_name: Schmiedmayer - first_name: Elena full_name: Redchenko, Elena id: 2C21D6E8-F248-11E8-B48F-1D18A9856A87 last_name: Redchenko citation: ama: 'De Zordo N, Borja Espinosa CN, Al Hyder R, et al. Detecting polar molecules with superconducting microwave resonators. In: Quantum 2.0 Conference and Exhibition. Optica Publishing Group; 2026.' apa: 'De Zordo, N., Borja Espinosa, C. N., Al Hyder, R., Li, J., Kersten, W., Kanagin, A., … Redchenko, E. (2026). Detecting polar molecules with superconducting microwave resonators. In Quantum 2.0 Conference and Exhibition. Glasgow, United Kingdom: Optica Publishing Group.' chicago: De Zordo, Nikolaus, Carla N Borja Espinosa, Ragheed Al Hyder, Jinglun Li, Wenzel Kersten, Andrew Kanagin, Georgios Koutentakis, et al. “Detecting Polar Molecules with Superconducting Microwave Resonators.” In Quantum 2.0 Conference and Exhibition. Optica Publishing Group, 2026. ieee: N. De Zordo et al., “Detecting polar molecules with superconducting microwave resonators,” in Quantum 2.0 Conference and Exhibition, Glasgow, United Kingdom, 2026. ista: De Zordo N, Borja Espinosa CN, Al Hyder R, Li J, Kersten W, Kanagin A, Koutentakis G, Kluibenschedl F, Lemeshko M, Fink JM, Schmiedmayer J, Redchenko E. 2026. Detecting polar molecules with superconducting microwave resonators. Quantum 2.0 Conference and Exhibition. Quantum 2.0, Technical Digest Series, , QM4D.3. mla: De Zordo, Nikolaus, et al. “Detecting Polar Molecules with Superconducting Microwave Resonators.” Quantum 2.0 Conference and Exhibition, QM4D.3, Optica Publishing Group, 2026. short: N. De Zordo, C.N. Borja Espinosa, R. Al Hyder, J. Li, W. Kersten, A. Kanagin, G. Koutentakis, F. Kluibenschedl, M. Lemeshko, J.M. Fink, J. Schmiedmayer, E. Redchenko, in:, Quantum 2.0 Conference and Exhibition, Optica Publishing Group, 2026. conference: end_date: 2026-06-18 location: Glasgow, United Kingdom name: Quantum 2.0 start_date: 2026-06-15 das_tickbox: '0' date_created: 2026-10-04T22:01:56Z date_published: 2026-09-01T00:00:00Z date_updated: 2026-10-12T07:52:45Z day: '01' department: - _id: JoFi - _id: GradSch - _id: MiLe language: - iso: eng month: '09' oa_version: None publication: Quantum 2.0 Conference and Exhibition publication_identifier: isbn: - '9781957171616' publication_status: published publisher: Optica Publishing Group quality_controlled: '1' scopus_import: '1' status: public title: Detecting polar molecules with superconducting microwave resonators type: conference user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 year: '2026' ... --- OA_type: closed access _id: '23056' abstract: - lang: eng text: Superconducting qubits face scaling challenges due to millikelvin temperature requirements. Here we demonstrate the generation and low-noise upconversion of single microwave photons to telecom frequencies, paving the way for quantum networks with superconducting qubits. alternative_title: - Technical Digest Series article_number: QM2A.1 article_processing_charge: No author: - first_name: Andrei full_name: Militaru, Andrei id: d67706f8-8eb1-11ee-ad1b-9c30dfa19e0b last_name: Militaru - first_name: Thomas full_name: Werner, Thomas id: 1fcd8497-dba3-11ea-a45e-c6fbd715f7c7 last_name: Werner orcid: 0009-0001-2346-5236 - first_name: Erfan full_name: Riyazi, Erfan id: 53322f94-5355-11ee-ae5a-ff6f81c87d51 last_name: Riyazi - first_name: Samarth full_name: Hawaldar, Samarth id: 221708e1-1ff6-11ee-9fa6-85146607433e last_name: Hawaldar orcid: 0000-0002-1965-4309 - first_name: Rishabh full_name: Sahu, Rishabh id: 47D26E34-F248-11E8-B48F-1D18A9856A87 last_name: Sahu orcid: 0000-0001-6264-2162 - first_name: Georg M full_name: Arnold, Georg M id: 3770C838-F248-11E8-B48F-1D18A9856A87 last_name: Arnold orcid: 0000-0003-1397-7876 - first_name: Paul full_name: Falthansl-Scheinecker, Paul id: 85b43b21-15b2-11ec-abd3-e2c252cc2285 last_name: Falthansl-Scheinecker - first_name: Jennifer Anais full_name: Sanchez Naranjo, Jennifer Anais id: 0fd10295-ebd4-11ec-b0f1-c1c8465143f9 last_name: Sanchez Naranjo - first_name: Dante full_name: Loi, Dante id: a24803ec-c619-11f1-873b-95804e96f22f last_name: Loi - first_name: Lucky full_name: Kapoor, Lucky id: 84b9700b-15b2-11ec-abd3-831089e67615 last_name: Kapoor orcid: 0000-0001-8319-2148 - first_name: Martin full_name: Zemlicka, Martin id: 2DCF8DE6-F248-11E8-B48F-1D18A9856A87 last_name: Zemlicka orcid: 0009-0005-0878-3032 - first_name: Liu full_name: Qiu, Liu id: 45e99c0d-1eb1-11eb-9b96-ed8ab2983cac last_name: Qiu orcid: 0000-0003-4345-4267 - first_name: Johannes M full_name: Fink, Johannes M id: 4B591CBA-F248-11E8-B48F-1D18A9856A87 last_name: Fink orcid: 0000-0001-8112-028X citation: ama: 'Militaru A, Werner T, Riyazi E, et al. Electro-optic conversion of itinerant Fock states. In: Quantum 2.0 Conference and Exhibition. Optica Publishing Group; 2026.' apa: 'Militaru, A., Werner, T., Riyazi, E., Hawaldar, S., Sahu, R., Arnold, G. M., … Fink, J. M. (2026). Electro-optic conversion of itinerant Fock states. In Quantum 2.0 Conference and Exhibition. Glasgow, United Kingdom: Optica Publishing Group.' chicago: Militaru, Andrei, Thomas Werner, Erfan Riyazi, Samarth Hawaldar, Rishabh Sahu, Georg M Arnold, Paul Falthansl-Scheinecker, et al. “Electro-Optic Conversion of Itinerant Fock States.” In Quantum 2.0 Conference and Exhibition. Optica Publishing Group, 2026. ieee: A. Militaru et al., “Electro-optic conversion of itinerant Fock states,” in Quantum 2.0 Conference and Exhibition, Glasgow, United Kingdom, 2026. ista: Militaru A, Werner T, Riyazi E, Hawaldar S, Sahu R, Arnold GM, Falthansl-Scheinecker P, Sanchez Naranjo JA, Loi D, Kapoor L, Zemlicka M, Qiu L, Fink JM. 2026. Electro-optic conversion of itinerant Fock states. Quantum 2.0 Conference and Exhibition. Quantum 2.0, Technical Digest Series, , QM2A.1. mla: Militaru, Andrei, et al. “Electro-Optic Conversion of Itinerant Fock States.” Quantum 2.0 Conference and Exhibition, QM2A.1, Optica Publishing Group, 2026. short: A. Militaru, T. Werner, E. Riyazi, S. Hawaldar, R. Sahu, G.M. Arnold, P. Falthansl-Scheinecker, J.A. Sanchez Naranjo, D. Loi, L. Kapoor, M. Zemlicka, L. Qiu, J.M. Fink, in:, Quantum 2.0 Conference and Exhibition, Optica Publishing Group, 2026. conference: end_date: 2026-06-18 location: Glasgow, United Kingdom name: Quantum 2.0 start_date: 2026-06-15 corr_author: '1' date_created: 2026-10-04T22:01:57Z date_published: 2026-09-01T00:00:00Z date_updated: 2026-10-12T08:53:25Z day: '01' department: - _id: JoFi - _id: GradSch - _id: GeKa language: - iso: eng month: '09' oa_version: None publication: Quantum 2.0 Conference and Exhibition publication_identifier: isbn: - '9781957171616' publication_status: published publisher: Optica Publishing Group scopus_import: '1' status: public title: Electro-optic conversion of itinerant Fock states type: conference user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 year: '2026' ... --- DOAJ_listed: '1' OA_place: publisher OA_type: gold _id: '23089' abstract: - lang: eng text: The location of the hydrogen-helium (H/He) immiscibility boundary controls whether and where helium rain occurs in giant planets, yet it remains uncertain because high-pressure experiments are challenging and ab initio simulations are limited in system size and simulation time. We map this boundary by computing composition-dependent chemical potentials from large-scale molecular dynamics driven by machine learning potentials trained on three density functional approximations (PBE, vdW-DF, and the hybrid HSE). Across the pressure range of 100-1000 GPa, the demixing temperatures are typically ~ 2000 K lower than previous ab initio simulations using small system sizes, and this discrepancy is larger than the estimated error from the chosen density functionals, machine learning potentials, neglect of nuclear quantum effects, and statistical uncertainties. Fitting the H/He mixing free energy to a Redlich-Kister regular solution model rationalizes the thermodynamic driving force for phase separation, and provides a predictive representation of the boundary. Comparing with current planetary interior profiles indicates that helium rain is plausible in Saturn but unlikely in the warmer interior of Jupiter. Our results narrow the uncertainty in the H/He immiscibility boundary and provide inputs for planetary models that couple demixing, heat transport, and composition gradients in gas giants. acknowledged_ssus: - _id: ScienComp acknowledgement: The authors are thankful to Armin Bergermann and Ronald Redmer for generously sharing AIMD trajectories and data, and for valuable discussions and feedback on the manuscript. The authors also acknowledge the research computing facilities provided by the high-performance computing (HPC) cluster at the Institute of Science and Technology Austria (ISTA), Berkeley Research Computing (BRC) at the University of California, Berkeley (UCB), and Lawrence Livermore National Laboratory (LLNL). B.C. was supported by the Laboratory Directed Research and Development (LDRD) Program at Lawrence Berkeley National Laboratory (LBNL) under project ID 110990-001. Part of this work was performed under the auspices of the U.S. Department of Energy by LLNL under Contract DE-AC52-07NA27344. S.H. was supported by the LDRD Program at LLNL under project tracking code 23-SI-006. article_number: '10382' article_processing_charge: Yes article_type: original author: - first_name: Xiaoyu full_name: Wang, Xiaoyu id: 8dff9c62-32b0-11ee-9fa8-fc73025e10f3 last_name: Wang - first_name: Sebastien full_name: Hamel, Sebastien last_name: Hamel - first_name: Bingqing full_name: Cheng, Bingqing id: cbe3cda4-d82c-11eb-8dc7-8ff94289fcc9 last_name: Cheng orcid: 0000-0002-3584-9632 citation: ama: Wang X, Hamel S, Cheng B. Hydrogen-helium immiscibility boundary in gas-giant planetary interiors from machine-learning molecular dynamics. Nature Communications. 2026;17. doi:10.1038/s41467-026-77117-8 apa: Wang, X., Hamel, S., & Cheng, B. (2026). Hydrogen-helium immiscibility boundary in gas-giant planetary interiors from machine-learning molecular dynamics. Nature Communications. Springer Nature. https://doi.org/10.1038/s41467-026-77117-8 chicago: Wang, Xiaoyu, Sebastien Hamel, and Bingqing Cheng. “Hydrogen-Helium Immiscibility Boundary in Gas-Giant Planetary Interiors from Machine-Learning Molecular Dynamics.” Nature Communications. Springer Nature, 2026. https://doi.org/10.1038/s41467-026-77117-8. ieee: X. Wang, S. Hamel, and B. Cheng, “Hydrogen-helium immiscibility boundary in gas-giant planetary interiors from machine-learning molecular dynamics,” Nature Communications, vol. 17. Springer Nature, 2026. ista: Wang X, Hamel S, Cheng B. 2026. Hydrogen-helium immiscibility boundary in gas-giant planetary interiors from machine-learning molecular dynamics. Nature Communications. 17, 10382. mla: Wang, Xiaoyu, et al. “Hydrogen-Helium Immiscibility Boundary in Gas-Giant Planetary Interiors from Machine-Learning Molecular Dynamics.” Nature Communications, vol. 17, 10382, Springer Nature, 2026, doi:10.1038/s41467-026-77117-8. short: X. Wang, S. Hamel, B. Cheng, Nature Communications 17 (2026). corr_author: '1' das_tickbox: '1' dataavailabilitystatement: 'The training data, fitted MLPs, MLP molecular dynamics results, and source data underlying all figures and tables in the main text and Supplementary Information have been deposited in the Zenodo repository: https://doi.org/10.5281/zenodo.21632034. The data-analysis and plotting scripts used to generate the figures and tables in the main text and Supplementary Information are available in the GitHub repository: https://github.com/ChengUCB/HighPressure_HHe.' date_created: 2026-10-11T22:02:04Z date_published: 2026-09-01T00:00:00Z date_updated: 2026-10-12T11:00:16Z day: '01' ddc: - '540' department: - _id: GradSch - _id: BiCh doi: 10.1038/s41467-026-77117-8 external_id: pmid: - '42816492' file: - access_level: open_access checksum: f39b50a550623a65aea2405b527e068c content_type: application/pdf creator: dernst date_created: 2026-10-12T10:57:42Z date_updated: 2026-10-12T10:57:42Z file_id: '23107' file_name: 2026_NatureComm_Wang.pdf file_size: 1559219 relation: main_file success: 1 file_date_updated: 2026-10-12T10:57:42Z fulldoi: https://doi.org/10.1038/s41467-026-77117-8 has_accepted_license: '1' intvolume: ' 17' language: - iso: eng month: '09' oa: 1 oa_version: Published Version pmid: 1 publication: Nature Communications publication_identifier: eissn: - 2041-1723 publication_status: published publisher: Springer Nature quality_controlled: '1' researchdata_availability: yes scopus_import: '1' status: public supplementarymaterial: yes title: Hydrogen-helium immiscibility boundary in gas-giant planetary interiors from machine-learning molecular dynamics tmp: image: /images/cc_by.png legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0) short: CC BY (4.0) type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 17 year: '2026' ... --- OA_place: publisher _id: '23072' abstract: - lang: eng text: "Inferring signal from large quantities of data is one of the most important problems in today’s\r\nworld, with neural networks emerging as the most powerful solution. While there have been\r\nmassive breakthroughs in the ML space, there are two main drawbacks. The first is that\r\nmost of these models are “black boxes”, with very little understanding of why they work,\r\nwhich makes it hard to find the correct architecture for a given problem. The architecture is\r\ncrucial, as the widely used training algorithms are “local” and thus rely on the loss landscape\r\nbeing benign enough to find a global optimum. This brings us to the second problem: while\r\nthere is a lot of evidence that this can be overcome with large enough data, this is less clear\r\nfor datasets which are noisy, do not have enough samples, or have a non-standard structure.\r\nHistorically, on a smaller scale, the alternative has been simple (Bayesian) statistical methods,\r\nwhich also have the advantage of being interpretable and adaptable. However, many of the\r\nclassical results cannot be easily extended to the high-dimensional regime in which modern\r\ndata lives.\r\nIn this work we want to consider two different settings relating to the above. The first is\r\napproximate message passing (AMP), an iterative algorithm for high-dimensional (generalized)\r\nlinear models that easily lends itself to Bayesian setups, and which in many cases is provably\r\nBayes-optimal. The second is an autoencoder with a shallow encoder, for which we can\r\nanalyze the weights along the training trajectory of gradient descent. Surprisingly, we will find\r\na connection between the two, as we recover certain structures of AMP.\r\nWe will first introduce the AMP framework by studying an extension that can be applied\r\nto a wider variety of data: rotationally invariant generalized approximate message passing\r\n(RI-GAMP). This shows that one can extend the AMP framework to a much wider class of\r\nalgorithms, relevant to more practical settings. The results are then also confirmed on real\r\ndata that go beyond the theoretical setting.\r\nWe then move to the setup of an autoencoder with a shallow encoder and a Bayesian prior in\r\nthe high-dimensional regime, in which the input and compression dimensions are large and\r\nproportional; this is also a first step towards opening one of the black boxes above, as we\r\ncan say precisely when and why the network works. While autoencoders are widely used in\r\nmodern ML architectures, most fundamental research in this direction has focused on extreme\r\nasymptotic regimes, where the autoencoder is either severely over- or under-parameterized,\r\nand which do not extend to the proportional high-dimensional regime. We show that for\r\nGaussian priors the network finds the global optimum, and these theoretical findings extrapolate\r\nstrikingly well to real image data. Next we extend this analysis to more structured priors and\r\na deeper decoder. For sparse Gaussian inputs in the training regime studied here, the shallow\r\ndecoder does not exploit sparsity and yields the same dynamics as in the Gaussian setting.\r\nWe then show how a deeper decoder can break this behavior, and interestingly, if we treat the\r\nproblem as an AMP problem, the network eventually learns the same decoding as AMP. This\r\ntoo extrapolates to real image data.\r\nLastly, we will show that the AMP setup has real practical use, by using a practical variant,\r\ngenetic vector approximate message passing (gVAMP), for predicting plasma protein levels\r\nfrom genetic information using the UKB GWAS data. This is a perfect example of the problems\r\nin the high-dimensional regime: approximately 8.4 million dimensions and 40,000 samples,\r\nwhere the high noise, low sample count, and large size make it hard for ML methods to work.\r\nTo get the optimal prediction accuracy we consider a two-step inference. We first consider a\r\npre-processed version of the data, of about 880,000 dimensions, on which we run the gVAMP\r\nalgorithm; this allows us to find predictive regions, taking into account joint effects between\r\ndifferent regions, and for most proteins we end up selecting only about 0.1% of the dimensions.\r\nWe then consider the analogue of this small subset, on which we can now run a standard tree\r\nalgorithm (XGB) that no longer suffers from the aforementioned problems. This pipeline yields\r\nbetter prediction accuracy than recent nonlinear deep learning approaches applied to this data,\r\nas we are able to handle the pre-processing in a principled Bayesian way." acknowledged_ssus: - _id: ScienComp acknowledgement: "This project was partially supported by the 2019 Lopez-Loreta Prize and\r\nthe ERC INF2 project (project number 101161364). Furthermore, the candidate acknowledges\r\nthe support from the Scientific Service Units of the Institute of Science and Technology Austria\r\nthrough resources provided by Scientific Computing." alternative_title: - ISTA Thesis article_processing_charge: No author: - first_name: Kevin full_name: Kögler, Kevin id: 94ec913c-dc85-11ea-9058-e5051ab2428b last_name: Kögler citation: ama: 'Kögler K. Compression and inference in high dimensions: An approximate message passing perspective. 2026. doi:10.15479/AT-ISTA-23072' apa: 'Kögler, K. (2026). Compression and inference in high dimensions: An approximate message passing perspective. Institute of Science and Technology Austria. https://doi.org/10.15479/AT-ISTA-23072' chicago: 'Kögler, Kevin. “Compression and Inference in High Dimensions: An Approximate Message Passing Perspective.” Institute of Science and Technology Austria, 2026. https://doi.org/10.15479/AT-ISTA-23072.' ieee: 'K. Kögler, “Compression and inference in high dimensions: An approximate message passing perspective,” Institute of Science and Technology Austria, 2026.' ista: 'Kögler K. 2026. Compression and inference in high dimensions: An approximate message passing perspective. Institute of Science and Technology Austria.' mla: 'Kögler, Kevin. Compression and Inference in High Dimensions: An Approximate Message Passing Perspective. Institute of Science and Technology Austria, 2026, doi:10.15479/AT-ISTA-23072.' short: 'K. Kögler, Compression and Inference in High Dimensions: An Approximate Message Passing Perspective, Institute of Science and Technology Austria, 2026.' corr_author: '1' date_created: 2026-10-07T11:20:26Z date_published: 2026-10-08T00:00:00Z date_updated: 2026-10-12T13:04:49Z day: '08' ddc: - '519' degree_awarded: PhD department: - _id: MaMo - _id: GradSch doi: 10.15479/AT-ISTA-23072 doi_confirm: '1' file: - access_level: closed checksum: 5fb2ff02dc9d8c659b2fb5e0802b06ff content_type: application/zip creator: kkoegler date_created: 2026-10-09T11:20:09Z date_updated: 2026-10-09T12:22:55Z file_id: '23084' file_name: 2026_Koegler_Kevin_Thesis.zip file_size: 8504109 relation: source_file - access_level: open_access checksum: a6df3b04c97628a1703f63356fb56f96 content_type: application/pdf creator: kkoegler date_created: 2026-10-09T13:25:49Z date_updated: 2026-10-09T13:25:49Z file_id: '23085' file_name: 2026_Koegler_Kevin_Thesis.pdf file_size: 6692605 relation: main_file success: 1 file_date_updated: 2026-10-09T13:25:49Z fulldoi: https://doi.org/10.15479/AT-ISTA-23072 has_accepted_license: '1' language: - iso: eng month: '10' oa: 1 oa_version: Published Version page: '222' project: - _id: 059876FA-7A3F-11EA-A408-12923DDC885E name: Prix Lopez-Loretta 2019 - Marco Mondelli publication_identifier: issn: - 2663-337X publication_status: published publisher: Institute of Science and Technology Austria related_material: record: - id: '14459' relation: part_of_dissertation status: public - id: '12540' relation: part_of_dissertation status: public - id: '17469' relation: part_of_dissertation status: public status: public supervisor: - first_name: Marco full_name: Mondelli, Marco id: 27EB676C-8706-11E9-9510-7717E6697425 last_name: Mondelli orcid: 0000-0002-3242-7020 title: 'Compression and inference in high dimensions: An approximate message passing perspective' type: dissertation user_id: 8b945eb4-e2f2-11eb-945a-df72226e66a9 year: '2026' ... --- OA_place: publisher OA_type: hybrid PlanS_conform: '1' _id: '23094' abstract: - lang: eng text: The formation of C(sp2)–heteroatom bonds through cross-coupling catalysis is central to the synthesis of pharmaceuticals, agrochemicals and materials. Whereas Pd0/PdII catalysis requires substrate-specific ligand optimization to balance the competing demands of oxidative addition and reductive elimination, NiI/NiIII catalysis offers a complementary strategy because the bond-forming step is intrinsically favourable. However, contemporary NiI/NiIII methodologies suffer from insufficient oxidative addition reactivity, restricting the aryl halide scope and requiring high catalyst loadings. Here we show that mechanistically guided ligand design overcomes these limitations. Together with a non-nucleophilic base additive that promotes direct visible-light generation of NiI from a bench-stable NiII precatalyst, this ligand design enables the coupling of electron-rich aryl bromides with N-, O-, S- and P-based nucleophiles at nickel loadings as low as 100 ppm. The method is compatible with sterically encumbered nucleophiles and enables gram-scale synthesis and late-stage functionalization of complex molecules. acknowledged_ssus: - _id: LifeSc - _id: MassSpec - _id: NMR - _id: M-Shop acknowledgement: We acknowledge ISTA for generous financial support. This research was supported by the Scientific Service Units (SSU) of ISTA through resources provided by the Lab Support Facility, Mass Spec Facility, NMR facility and the Miba Machine Shop. We specifically thank A. Paraskevopoulou for high-resolution mass spectrometry measurements. B.P. acknowledges the Austrian Science Fund (PAT 1250924) and the ACS GCI Pharmaceutical Roundtable for funding. T.B. thanks the European Union’s Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie Grant Agreement No. 101034413. D.B. acknowledges funding from the Czech Science Foundation (25-17760M). Open access funding provided by Institute of Science and Technology (IST Austria). article_processing_charge: Yes (via OA deal) article_type: original author: - first_name: Aleksander full_name: Bena, Aleksander id: 4197c39e-e8ec-11ed-86cb-afed934cd664 last_name: Bena - first_name: Trisha full_name: Banik, Trisha id: 506b8e06-c59a-11ee-a1af-ae470719e7d3 last_name: Banik - first_name: Christos full_name: Giannoudis, Christos id: 1bd506c6-e8ec-11ed-86cb-d495f63f2dcd last_name: Giannoudis - first_name: Florian full_name: Ortis, Florian id: e34c9177-3208-11ee-ac71-a6a15cf2ef29 last_name: Ortis orcid: 0000-0002-0458-5187 - first_name: Daniel full_name: Bím, Daniel last_name: Bím - first_name: Haralds full_name: Baunis, Haralds id: 2eea55ec-e8ec-11ed-86cb-d9c76787acfe last_name: Baunis - first_name: Gayathri full_name: Palissery, Gayathri id: b02c9d47-50c9-11ef-b52e-b2180bf00ccd last_name: Palissery - first_name: Bartholomäus full_name: Pieber, Bartholomäus id: 93e5e5b2-0da6-11ed-8a41-af589a024726 last_name: Pieber orcid: 0000-0001-8689-388X citation: ama: Bena A, Banik T, Giannoudis C, et al. Ligand design broadens NiI-catalysed C(sp2)–heteroatom couplings of aryl bromides at low catalyst loadings. Nature Catalysis. 2026. doi:10.1038/s41929-026-01616-6 apa: Bena, A., Banik, T., Giannoudis, C., Ortis, F., Bím, D., Baunis, H., … Pieber, B. (2026). Ligand design broadens NiI-catalysed C(sp2)–heteroatom couplings of aryl bromides at low catalyst loadings. Nature Catalysis. Springer Nature. https://doi.org/10.1038/s41929-026-01616-6 chicago: Bena, Aleksander, Trisha Banik, Christos Giannoudis, Florian Ortis, Daniel Bím, Haralds Baunis, Gayathri Palissery, and Bartholomäus Pieber. “Ligand Design Broadens NiI-Catalysed C(Sp2)–Heteroatom Couplings of Aryl Bromides at Low Catalyst Loadings.” Nature Catalysis. Springer Nature, 2026. https://doi.org/10.1038/s41929-026-01616-6. ieee: A. Bena et al., “Ligand design broadens NiI-catalysed C(sp2)–heteroatom couplings of aryl bromides at low catalyst loadings,” Nature Catalysis. Springer Nature, 2026. ista: Bena A, Banik T, Giannoudis C, Ortis F, Bím D, Baunis H, Palissery G, Pieber B. 2026. Ligand design broadens NiI-catalysed C(sp2)–heteroatom couplings of aryl bromides at low catalyst loadings. Nature Catalysis. mla: Bena, Aleksander, et al. “Ligand Design Broadens NiI-Catalysed C(Sp2)–Heteroatom Couplings of Aryl Bromides at Low Catalyst Loadings.” Nature Catalysis, Springer Nature, 2026, doi:10.1038/s41929-026-01616-6. short: A. Bena, T. Banik, C. Giannoudis, F. Ortis, D. Bím, H. Baunis, G. Palissery, B. Pieber, Nature Catalysis (2026). corr_author: '1' das_tickbox: '1' dataavailabilitystatement: All data are available from the authors upon request. date_created: 2026-10-11T22:02:06Z date_published: 2026-09-29T00:00:00Z date_updated: 2026-10-14T06:32:42Z day: '29' department: - _id: BaPi - _id: GradSch - _id: RaKl doi: 10.1038/s41929-026-01616-6 ec_funded: 1 fulldoi: https://doi.org/10.1038/s41929-026-01616-6 language: - iso: eng main_file_link: - open_access: '1' url: https://doi.org/10.1038/s41929-026-01616-6 month: '09' oa: 1 oa_version: Published Version project: - _id: 8f1d607d-16d5-11f0-9cad-ab453295ba5e grant_number: PAT 1250924 name: Photoactive ligands for transformative nickel catalysis - _id: fc2ed2f7-9c52-11eb-aca3-c01059dda49c call_identifier: H2020 grant_number: '101034413' name: 'IST-BRIDGE: International postdoctoral program' publication: Nature Catalysis publication_identifier: eissn: - 2520-1158 publication_status: epub_ahead publisher: Springer Nature quality_controlled: '1' researchdata_availability: upon request scopus_import: '1' status: public supplementarymaterial: yes title: Ligand design broadens NiI-catalysed C(sp2)–heteroatom couplings of aryl bromides at low catalyst loadings type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 year: '2026' ... --- DOAJ_listed: '1' OA_place: publisher OA_type: gold PlanS_conform: '1' _id: '23115' abstract: - lang: eng text: "We investigate the association between galaxies and neutral O I absorption systems at z ∼ 6, which trace metalenriched gas during the epoch of reionization. We identify 40 galaxies across six quasar fields, residing in 15\r\noverdensities within 300 kpc of the background sight lines. Five O I absorption systems are associated with five of\r\nthese overdensities, yielding a covering fraction of\r\n0.27 0.10\r\n+0.13\r\nwithin 300 kpc. The absorption occurs beyond typical\r\nvirial radii, indicating that the gas traces extended overdensity environments rather than individual galaxy halos,\r\nunlike the z ∼ 0 circumgalactic medium (CGM), which is largely bound to halos. These galaxy-associated\r\nabsorbers account for ∼35% of all O I systems seen in blind quasar surveys, implying the remainder arise in\r\nlower-mass galaxies below our detection threshold or in dense neutral intergalactic medium pockets. The CGM\r\naround these galaxies contains ≳ 2 × 106 M⊙ of oxygen, comparable to the interstellar medium oxygen mass of\r\nthe galaxies themselves, suggesting that the surrounding environment holds as much metal mass as the galaxies.\r\nAll five galaxy-associated systems show significantly higher\r\nlog NCII NOI ( / )\r\nratios than absorbers lacking galaxy\r\nassociations. Furthermore, relative abundance ratios ([Si/O], [C/O]) reveal that four of the five exhibit\r\nenrichment patterns consistent with Population III nucleosynthesis at the outskirts of galaxy overdensities. These\r\nrare systems offer a unique window into the role of first-generation stars in shaping the early metal enrichment of\r\ngalaxies and their environments." acknowledgement: "IOP Science home\r\nAccessibility Help\r\n\r\nJournals\r\nBooks\r\nPublishing Support\r\nLogin\r\nThe Astrophysical Journal\r\nThe American Astronomical Society, find out more.\r\n\r\nThe following article isOpen access\r\nEIGER. VIII. First Stars Signatures in the Connection between O I Absorption and Galaxies in the Epoch of Reionization\r\nJack Higginson, Rongmon Bordoloi, Robert A. Simcoe, Jorryt Matthee, Daichi Kashino, Ruari Mackenzie, Ivan Kramarenko, Simon J. Lilly, Anna-Christina Eilers, Rohan P. NaiduShow full author list\r\n\r\nPublished 2026 February 24 • © 2026. The Author(s). Published by the American Astronomical Society.\r\nThe Astrophysical Journal, Volume 999, Number 1\r\nCitation Jack Higginson et al 2026 ApJ 999 49\r\nDOI 10.3847/1538-4357/ae3e81\r\n\r\nPDFOpens in a new tab.\r\nePub\r\nAuthors\r\nFigures\r\nTables\r\nReferences\r\nArticle data\r\nPDFOpens in a new tab.\r\nePub\r\nArticle metrics\r\n626 Total downloads\r\n\r\n22 total citations on Dimensions.\r\nShare this article\r\nArticle information\r\nAbstract\r\nWe investigate the association between galaxies and neutral O i absorption systems at z ∼ 6, which trace metal-enriched gas during the epoch of reionization. We identify 40 galaxies across six quasar fields, residing in 15 overdensities within 300 kpc of the background sight lines. Five O i absorption systems are associated with five of these overdensities, yielding a covering fraction of \r\n within 300 kpc. The absorption occurs beyond typical virial radii, indicating that the gas traces extended overdensity environments rather than individual galaxy halos, unlike the z ∼ 0 circumgalactic medium (CGM), which is largely bound to halos. These galaxy-associated absorbers account for ∼35% of all O i systems seen in blind quasar surveys, implying the remainder arise in lower-mass galaxies below our detection threshold or in dense neutral intergalactic medium pockets. The CGM around these galaxies contains ≳ 2 × 106 M⊙ of oxygen, comparable to the interstellar medium oxygen mass of the galaxies themselves, suggesting that the surrounding environment holds as much metal mass as the galaxies. All five galaxy-associated systems show significantly higher \r\n ratios than absorbers lacking galaxy associations. Furthermore, relative abundance ratios ([Si/O], [C/O]) reveal that four of the five exhibit enrichment patterns consistent with Population III nucleosynthesis at the outskirts of galaxy overdensities. These rare systems offer a unique window into the role of first-generation stars in shaping the early metal enrichment of galaxies and their environments.\r\n\r\nExport citation and abstract\r\nBibTeX\r\nRIS\r\n\r\nPrevious article in issue\r\nNext article in issue\r\nRelated links\r\n\r\nOriginal content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.\r\n\r\n1. Introduction\r\nThe first generations of stars formed shortly after the Epoch of Recombination within dark matter overdensities, producing the first significant quantities of metals and enriching the intergalactic medium (IGM) while reionizing hydrogen and helium (e.g., R. S. Klessen & S. C. O. Glover 2023). These metals and gas eventually coalesced into the first galaxies, which over cosmic time evolved into Milky Way–like systems today. Studying these young galaxies and their environments provides critical insight into galaxy formation and evolution, constraining models of stellar feedback, gas accretion, and chemical enrichment (C.-A. Faucher-Giguère & S. P. Oh 2023; C. Peroux & D. Nelson 2024).\r\n\r\nAt low redshift, decades of observations using deep ground-based spectroscopy and Hubble Space Telescope (HST) data of background quasars and foreground galaxies have built a rich understanding of the circumgalactic medium (CGM) and its interplay with galaxies (e.g., J. Tumlinson et al. 2017). The CGM plays a crucial role in gas recycling, star formation regulation, and quenching; understanding its structure and composition informs galaxy growth models (Y. Peng et al. 2015; E. Zinger et al. 2020).\r\n\r\nHigh-redshift studies, leveraging ground- and space-based near-infrared (NIR) spectroscopy of quasars, reveal that the early Universe was already chemically enriched by the epoch of reionization (e.g., T. J. Cooper et al. 2019; L. Christensen et al. 2023; R. L. Davies et al. 2023a). Among tracers of neutral and low-ionization gas, O i has emerged as a key probe: surveys report an increase in O i number density at z ≳ 5–6 (G. D. Becker et al. 2019; L. Christensen et al. 2023; A. M. Sebastian et al. 2024; A. Sodini et al. 2024), while higher-ionization species like C iv and Si iv decline, consistent with a softer and evolving UV background at the end of reionization (T. J. Cooper et al. 2019; V. D’Odorico et al. 2022; R. L. Davies et al. 2023a, 2023b).\r\n\r\nHistorically, connecting absorption systems with their host galaxies was challenging due to the difficulty of obtaining deep, high-redshift galaxy spectroscopy. This has changed with the advent of JWST, providing unprecedented views of early galaxies and their impact on surrounding gas through surveys such as EIGER (D. Kashino et al. 2023) and ASPIRE (F. Wang et al. 2023). First systematic studies of cool, low-ionization CGM traced by Mg ii around z ∼ 6 galaxies suggest that high-redshift CGM differs significantly from its low-redshift counterpart: these galaxies typically have low masses, and strong stellar feedback can eject metals far beyond the halo’s gravitational potential (R. Bordoloi et al. 2024). Such pioneering studies now allow systematic investigations of the CGM in the early Universe.\r\n\r\nThe UV background during reionization was inhomogeneous and rapidly evolving (e.g., S. R. Furlanetto & S. P. Oh 2005; B. D. Oppenheimer et al. 2009; K. Finlator et al. 2013; G. D. Becker et al. 2015; S. E. I. Bosman et al. 2022), initially dominated by Population III stars (K. Nakajima & R. Maiolino 2022; K. Nakajima et al. 2025), then by early star-forming galaxies (L. Jiang et al. 2022; J. Matthee et al. 2022), with active galactic nuclei (AGN) contributing significantly by z ∼ 5 (A. D’Aloisio et al. 2017; G. Kulkarni et al. 2019; C.-A. Faucher-Giguère 2020). Modeling indicates that pockets of Population III star formation may persist throughout the Epoch of Reionization (L. Tornatore et al. 2007; R. H. Mebane et al. 2018; J. L. Johnson & A. Aykutalp 2019; A. Venditti et al. 2023; O. Zier et al. 2025).\r\n\r\nThe large reservoir of neutral O i observed in quasar absorption lines at high redshift is typically self-shielded, providing robust estimates of chemical abundances. Studying the association of these absorbers with galaxies offers unique insight into the CGM of early galaxies, and into potential contributions from Population III stars to early chemical enrichment.\r\n\r\nIn this work, we study the cool, neutral CGM around galaxies at z ∼ 6, traced by O i absorption from the EIGER survey (D. Kashino et al. 2023). We focus on O i absorbers associated with [O iii]5008-emitting galaxies at 5.875 150 kpc, an incidence of is measured. Within 300 kpc of the primary galaxy, the overall incidence is , with values of for 50 ≤ R ≤ 300 kpc and for 100 ≤ R ≤ 300 kpc. These rates are substantially weaker than the incidence of strong Mg ii absorption at z ∼ 6 (R. Bordoloi et al. 2024), indicating that neutral oxygen preferentially traces a different phase of the circumgalactic environment.\r\n\r\nPanels (b) and (d) reveal that O i absorbers are typically located at much larger R/Rvir than strong low-ionization tracers such as Mg ii. This distinction suggests that O i absorption at z ∼ 6 is not confined to the CGM of an individual galaxy but instead reflects the larger-scale gaseous environment of galaxy overdensities—what might be described as “cosmic ecosystems” rather than isolated halos.\r\n\r\nComparing the stellar mass distributions of overdensities with and without O i absorption, we find no statistically significant differences. The mean stellar mass of galaxies in overdensities with absorption is , compared to for those without.\r\n\r\nWe emphasize that at z ∼ 6, the large R/Rvir values of these halos imply that O i absorption typically arises at scales well beyond the typical CGM [R/Rvir ≲ 1] (J. Tumlinson et al. 2017) probed by low-ionization lines at lower redshift. Unlike the low-z CGM, where metal absorbers are closely tied to the halo of a single massive galaxy, the O i absorbers studied here appear to be linked to extended networks of low-mass, young galaxies embedded in shared overdensities. Over cosmic time, these small systems and their diffuse gaseous environments are expected to merge and evolve into more massive systems, eventually forming Milky Way–like galaxies by z = 0. Thus, neutral O i at reionization is best understood not as a tracer of isolated galactic halos, but as a probe of the extended environments that connect galaxies, gas, and structure growth in the early Universe.\r\n\r\nBecause O i absorption traces dense, neutral gas and requires only minimal ionization corrections, we can place a conservative lower limit on the total oxygen mass associated with the EIGER galaxies. These estimates are intended as simple, order-of-magnitude calculations to provide intuition about the amount of neutral oxygen relative to the observed galaxy properties. Following the formalism of R. Bordoloi et al. (2014), the oxygen mass contained in an annulus bounded by Rin and Rout is\r\n\r\nwhere Rin and Rout are the inner and outer radii of the annulus, fc is the covering fraction (the incidence of O i detections in that bin), 〈NOI〉 is the mean O i column density in the annulus, and mO = 16 mp is the mass of an oxygen atom, with mp being the mass of a proton. For a conservative lower limit, we adopt fion = 1, where fion is the ionization fraction (i.e., we assume that all of the oxygen mass is in the neutral phase). We justify this assumption as follows: O i is tightly coupled to H i through charge exchange, and in dense gas, the required ionization correction is minor, even under strong radiation fields such as the Fermi Bubbles (R. Bordoloi et al. 2017; T. Ashley et al. 2022). Under a typical metagalactic UV background, it is generally less than 10% and does not significantly alter the inferred oxygen abundance. In addition, oxygen does not deplete onto dust grains, unlike Si or C. For these reasons, we consider the approximation NO,total ≈ NOI to be valid for our analysis.\r\n\r\nWe compute masses in two radial bins: 0–100 kpc and 100–300 kpc, respectively. The total oxygen mass within radius is obtained by summing the masses of the constituent annuli. This yields a strict lower limit of ≳ 2 ×106M⊙ on the total oxygen mass within = 300 kpc.\r\n\r\nWe compare the inferred oxygen mass in the extended environment of our sample with the total oxygen content in the interstellar medium (ISM) of a typical z ∼ 6 galaxy. In computing this quantity, we make the following assumptions. First, we assume that all galaxies in this work lie on the typical z ∼ 6 mass–metallicity relation, derived by stacking [O iii] emitter galaxies (J. Matthee et al. 2022), and we adopt the gas-phase metallicity from this relation for each galaxy.\r\n\r\nBecause direct measurements of the total H2 and H i gas content are not available at these redshifts, we extrapolate the molecular gas fraction from L. J. Tacconi et al. (2018) to z ∼ 6 and adopt a conservative H i gas fraction based on local observations (S. Huang et al. 2012). We note that high-z galaxies are likely more gas-rich than their local counterparts; therefore, the inferred ISM gas masses should be considered lower limits.\r\n\r\nWith these caveats in mind, we estimate the total ISM oxygen mass as\r\n\r\nwhere we define . Here, XO is the gas-phase oxygen abundance derived from the mass–metallicity relation, and and MHI are the molecular and atomic gas masses derived as described above. For our galaxy sample, the mean stellar mass is , corresponding to an ISM oxygen mass of MO,ISM ≳ 6.8 × 105 M⊙. Remarkably, this indicates that the typical ISM oxygen content is comparable to the oxygen mass in the extended environment around these galaxies, implying that the circumgalactic or intergalactic medium at z ∼ 6 contains a substantial reservoir of oxygen. While these estimates depend on several specific assumptions, the inferred ISM and CGM oxygen masses appear to be of similar magnitude.\r\n\r\nAt low redshift, both L* and sub-L* galaxies similarly exhibit substantial metal content in their circumgalactic medium (CGM), with the CGM containing at least as much metal as the ISM of their host galaxies (J. Tumlinson et al. 2011; R. Bordoloi et al. 2014). A key difference is that, whereas the low-z CGM is typically gravitationally bound to its host galaxy, at high redshift much of the gas exists in the extended environment of galaxy overdensities rather than being bound to individual galaxies (see also R. Bordoloi et al. 2024).\r\n\r\n4.2. Expected Incidence of O i Absorbers\r\nIn this section, we report the expected redshift-path incidence of O i absorbers around [O iii] emitting galaxies detected in the EIGER survey. We define the number of O i absorbers associated with each galaxy overdensity per unit absorption distance above a detection threshold (WOI ≥ 0.05Å ) as\r\n\r\n\r\nHere, Rmax = 300 kpc is the survey radius adopted in this work, and is the mean O i absorber detection completeness (see Section 3.5; 91.4% for WOI ≥ 0.05 Å). nOD is defined as\r\n\r\n\r\nngal is the number density of [O iii] emitting galaxies per unit comoving volume, estimated from the [O iii] luminosity function at z ∼ 6. And 〈overdensity size〉 is simply the mean number of galaxies in each galaxy overdensity empirically measured to be 〈overdensity size〉 = 2.67. fc is the O i absorption covering fraction within 300 kpc for WOI ≥ 0.05 Å (). (The covering fraction within 300 kpc is independent of the definition of the primary member.)\r\n\r\nTo estimate the number density of galaxies per unit comoving volume (ngal), we integrate the z ∼ 6 [O iii] luminosity function derived from the EIGER survey, with a minimum luminosity of Lmin = 1042.2 ergs−1 (J. Matthee et al. 2022):\r\n\r\n\r\nwhere Φ(L) is the [O iii] luminosity function defined as\r\n\r\n\r\nHere, Φ* is the characteristic number density, L* is the characteristic luminosity, and α is the faint-end slope. We adopt Φ* = 10−4.02 Mpc−3, L* = 1043.33 ergs−1, and α = −1.92, values derived from detailed completeness calculations of the EIGER [O iii]-emitting galaxies (R. Mackenzie et al. 2026, in preparation). This results in ngal = 8.586 × 10−04 Mpc−3. Using these values in Equation (6) yields , for O i absorption around galaxies at a mean galaxy redshift of 6.001.\r\n\r\nAll calculations in this section are performed with a detection threshold of WOI > 0.05Å, since the survey is highly complete down to this equivalent-width limit and because most of the literature surveys we compare against adopt the same threshold.\r\n\r\nWe emphasize that this approach differs from blind QSO absorption-line surveys (e.g., G. D. Becker et al. 2006; L. Christensen et al. 2023; A. M. Sebastian et al. 2024; A. Sodini et al. 2024), where all O i absorption-line systems along the full quasar redshift path are counted to compute dN/dX directly, under the assumption that the absorber cross section is contributed by all galaxies. In contrast, our method begins by defining the absorber cross section around galaxy overdensities and then estimating the corresponding contribution to dN/dX from the galaxy overdensities under study. Comparing these two approaches constrains the fraction of O i (or other metal) absorption systems that arise in the extended halos of these galaxies. Figure 6 shows these literature measurements as colored circles, while the contribution to dN/dX around z ∼ 6 galaxy overdensities is indicated by an orange square. To quantify the relative contribution of galaxy overdensities, we fit a single power law to all literature values at z > 4 (blue dashed line with shaded region). Comparing the dN/dX inferred from quasar absorption-line surveys at z ∼ 6 to our measured value, we find that O i dN/dX around z ∼ 6 EIGER galaxy environments account for 35% ± 16% of all O i absorption-line systems detected in blind quasar surveys. This implies that [O iii] emitting galaxy environments at z ∼ 6 contribute roughly one-third of the O i absorption systems at that epoch. Although the EIGER QSOs were selected to have known absorption systems along their sight lines, the EIGER galaxy survey around these sight lines is highly complete and independent of this selection. Therefore, we can create an unbiased measurement of the absorption cross section (dN/dX) around these galaxy overdensities. We justify this comparison to blind absorption surveys in Section 2.\r\n\r\nZoom InZoom OutReset image size\r\nFigure 6. Incidence of O i absorbers per comoving path length, dN/dX. Values are derived from all O i absorption lines along high-z quasar sight lines. Literature measurements are shown from G. D. Becker et al. (2019; blue circles), L. Christensen et al. (2023; purple circles), and A. M. Sebastian et al. (2024; red circles). The blue dashed line shows a power-law fit to the z > 4 literature data, with the shaded region marking the 1σ uncertainty. The orange square gives the inferred dN/dX when including only O i absorption associated with host galaxies (see Section 4.2), indicating that only ∼35% of O i absorbers at z ∼ 6 arise in galaxy environments.\r\n\r\nDownload figure:\r\n\r\nStandard image\r\nHigh-resolution image\r\nThis in turn suggests that ∼65% of the O i absorption systems detected along quasar sight lines at the epoch of reionization are not associated with [O iii] emitter galaxy overdensities. Either the bulk of O i absorption resides in isolated pockets of neutral IGM gas outside extended galaxy halos, or it is contributed by even lower-luminosity, less massive galaxies () that fall below the EIGER detection limits. Such systems may also be detected in galaxy halos that are oxygen-poor or lack strong [O iii] emission features, since our galaxy identifications primarily rely on [O iii] and Hβ emission lines.\r\n\r\nSimulations suggest that O i absorption should primarily arise in galactic halos rather than in the diffuse IGM, since metals are not widely distributed and ionization fronts propagate more quickly than metals (B. D. Oppenheimer et al. 2009; K. Finlator et al. 2013). Very low-mass protogalaxies forming their first stars may blur the boundary between IGM and CGM, enriching their surroundings with metals, especially if their star formation is bursty and prolific. If sufficiently numerous, such systems could contribute a nonnegligible fraction of oxygen in the early Universe.\r\n\r\nRecent observations support this possibility. K. Nakajima et al. (2025) reported a strongly lensed (μ = 98) galaxy at z ≈ 6.6 with a stellar mass upper limit of only ∼2700 M⊙ and a dynamical mass ∼100 times larger. The source shows emission and may be dominated by Population III stars. This provides direct evidence of oxygen production in extremely low-mass systems. A population of such ultralow-mass dwarf galaxies could plausibly account for the ∼65% of O i absorbers detected along quasar sight lines that are not associated with galaxies in our survey. Our sensitivity limit of (J. Matthee et al. 2022) means such dwarfs remain undetected. However, these galaxies may lack a dense enough CGM to shield neutral O i from the UV background; thus, even if they produce oxygen, neutral O i may not survive (K. Finlator et al. 2013). Interestingly, simulations by S. Kušmić et al. (2024) showed that the contribution of metal ions, including O i, is only weakly correlated with the stellar mass of the galaxy, and the contribution is indistinguishable when comparing across galaxy luminosities. Additionally, they argue that due to the steep slope of the stellar mass function, lower-mass, lower-luminosity galaxies contribute the majority of absorbing metal ions in the CGM and IGM.\r\n\r\nLater simulation works by C. Doughty et al. (2018); C. Doughty & K. Finlator (2019) suggest that as the Epoch of Reionization continues, O i will reduce overall but be preferentially found in higher column density regions close to halos, as they have a better ability to self-shield from ionizing photons. In fact, C. Doughty & K. Finlator (2019) found that at z = 6 the majority of O i mass was located in the ISM of galaxies and only ∼30% of O i mass was found in the CGM and IGM. In contrast, in this work, we find that a substantial (comparable to ISM mass) oxygen mass exists outside galaxies; however, we stress that our mass measurements are order-of-magnitude estimates. A more direct comparison between these simulations and this work is the covering fraction. They report ∼5%–25% covering fraction at z = 6 for O i with out to 102 pkpc. In the EIGER survey, we report a covering fraction using a minimum threshold of WOI ≥ 0.05 Å (or approximately logNOI > 13.7 cm−2) out to 300 kpc. Given the large measurement uncertainties and different definitions of associated galaxies, the covering fractions are qualitatively consistent between the two works.\r\n\r\nThe simulations of K. Finlator et al. (2013) suggest that O i absorbers with are most likely associated with halos of mass ∼109 M⊙, where self-shielding is efficient. They further predict that only ∼13% of all O i absorption systems should reside in halos of 1010–1011.5 M⊙, the mass range of galaxies probed in this work. By contrast, we measure a higher dN/dX of ∼35%, but qualitatively our results remain consistent with the idea that roughly two-thirds of O i absorbers are associated with undetected ∼109 M⊙ halos. Future observations targeting lower-luminosity galaxies and higher redshifts will be essential to test these predictions.\r\n\r\nAfter the initial posting of this manuscript, G. Pruto et al. (2026) presented a simulation-based study that adopts the observational compilation shown in Figure 6 as a reference and explores the corresponding behavior in numerical models. Our minimum Wr threshold corresponds to ; therefore, the most appropriate comparison is with their sample. Qualitatively, the two sets of results are in agreement. A key distinction lies in the definition of galactic environment. We characterize environments in terms of galaxy overdensities, which we argue is the most appropriate description of where O i absorbers reside at z ≈ 6, whereas G. Pruto et al. (2026) define the CGM based on the virial radii of halos with . As a result, a direct quantitative comparison is not straightforward. Nevertheless, their inferred dN/dX corresponds to an incidence rate of O i absorbers of ∼58% ± 11%, which is consistent with our measurements within the uncertainties. This agreement may depend on their tighter constraints on absorber location and on the adopted minimum Wr or threshold. G. Pruto et al. (2026) further report that ∼80% of O i absorbers with are predicted to lie outside the CGM, also in qualitative agreement with our findings.\r\n\r\n4.3. Metal Abundances in O i absorber population\r\nIn this section, we examine the relative abundances and metal column density ratios of O i absorbers associated with galaxy overdensities, and compare them to O i absorbers without any associated galaxies. To enable a fair comparison, we restrict our analysis to the six quasar sight lines from the EIGER survey and identify all O i absorption systems in the redshift range where an [O iii]-emitting galaxy could be detected (5.9 ≤ zOI ≤ zQSO). We detect 10 O i absorption systems in total, 5 of which have associated galaxy overdensities (Table 1) and 5 are without any identified galaxy association.\r\n\r\nWe first compare the ionic column density ratios in these two populations. Figure 7 (top panels) shows the ratios of NSiII/NOI and NCII/NOI as functions of NOI. Systems located near galaxy overdensities (blue squares) systematically show higher Si ii/O i and C ii/O i ratios compared to systems without associated overdensities (green crosses). This offset could reflect differences in metallicity, or alternatively, the effects of ionization. However, since the majority of these O i systems lack detectable high-ionization transitions, it is reasonable to assume that neutral oxygen and singly ionized silicon and carbon dominate the elemental reservoirs (see also L. Christensen et al. 2023). In those cases, the observed ionic ratios provide direct tracers of relative abundances. Two exceptions are found along the J0100 and J1148 sight lines, which do exhibit Si iv and C iv absorption; for these systems, the degeneracy between chemical composition and ionization corrections cannot be resolved. It is plausible that, on average, O i absorption found near galaxy overdensities has higher elemental abundance ratios as the non-galaxy-associated absorbers either have significantly lower-luminosity and less massive galaxies, which would be expected to produce less metal, or there are truly no galaxies associated with this population.\r\n\r\nZoom InZoom OutReset image size\r\nFigure 7. Top panels: ion column density ratios of Si ii to O i (left) and C ii to O i (right) as a function of the detected O i column densities, shown in logarithmic units. Absorbers associated with galaxy overdensities (blue squares) and those not associated with galaxy overdensities (green crosses) exhibit clear variations in their column density ratios. One sight line with no detected Si ii absorption is indicated with a downward arrow, where a 2σ upper limit on the column density is assumed. Bottom panel: relative abundance ratios [Si/O] vs. [C/O] with respect to solar abundance. The background contours show the IMF-weighted abundance distributions from Population II and Population III SN models. Orange and pink circles indicate abundance ratios predicted by low-metallicity Population II SN models. The abundance ratios of several O i absorbers associated with galaxy overdensities are consistent with a significant contribution from Population III SNe.\r\n\r\nDownload figure:\r\n\r\nStandard image\r\nHigh-resolution image\r\nWe next compute the relative abundances [Si/O] and [C/O], presented in the bottom panel of Figure 7. These abundances are defined as\r\n\r\n\r\nwhere NSi,tot and NC,tot represent the summed ionic column densities. For systems with detected high-ionization absorption (C iv or Si iv), we include both low- and high-ionization states (NSiII + NSiIV and NCII + NCIV), marking these measurements as lower limits (blue upward arrows in the figure) since additional undetected ionization states may be present. We note that in the two systems (a and b) exhibiting high-ionization absorption (see Table 1), the low- and high-ionization absorption components are offset in velocity by Δv = –66 km s−1 and –69 km s−1, respectively. These offsets are within ≲1.5 resolution elements of the instrument, and therefore we cannot statistically distinguish whether the low- and high-ionization components are kinematically distinct. This is suggestive of a complex, potentially multiphase gaseous environment in the outskirts of these galaxies. For systems without detected high-ionization transitions, we adopt NSiII and NCII as the dominant contributions. We assume NO,tot ≈ NOI, as ionization corrections for O i are typically very small at high O i column densities (see Section 4.1 for discussion). We adopt solar reference abundances of = −1.18 ± 0.05 and (M. Asplund et al. 2021).\r\n\r\nFigure 7 (bottom panel) reveals a striking separation between O i absorbers associated with galaxy overdensities (blue squares) and those without galaxy associations (green crosses). Systems near galaxies are found in the upper left of the [Si/O]–[C/O] diagram, with two cases exhibiting high-ionization absorption (lower abundance limits, blue arrows), which will offset them even farther from the locus of nongalaxy absorbers.\r\n\r\nWe place these abundance patterns in the context of chemical enrichment models from different stellar populations (see also L. Christensen et al. 2023). The contours and colored circles in Figure 7 highlight predicted [C/O] and [Si/O] yields from representative Population II and Population III supernova (SN) models, weighted by a Salpeter IMF. The weighting by number of stars predicted by an IMF is done to represent the typical observational relative abundance distribution in these models. These are not exhaustive but span the dominant theoretical expectations.\r\n\r\nPopulation III pair-instability SNe (PISNe; 140–260M⊙; light green contours) predict narrow [C/O] ≃ –0.7 and high [Si/O] values, inconsistent with any of our observed systems. Such PISNe are also expected to produce substantial amounts of iron-peak elements, leading to elevated Fe/O ratios (J. Tumlinson et al. 2004). We will investigate Mg ii and Fe ii absorption associated with z ∼ 6 galaxies in an upcoming work (J. Higginson et al. 2026, in preparation). Models of massive Population III stars (10–100 M⊙) produce both hypernovae (gray contours; E > 1052 erg) and standard core-collapse SNe (light blue contours; A. Heger & S. E. Woosley 2010), spanning a broader region overlapping some of our measurements. We also consider Population II models: low-metallicity core-collapse SNe from M. Limongi & A. Chieffi (2018; orange contours, Population II SNe (L18)) occupy −0.25 ≲ [C/O] ≲ 0.5 and −0.4 ≲ [Si/O] ≲ 0.4, overlapping parts of the Population III range, while the C. Kobayashi et al. (2006) yields (pink and orange circles for hypernovae and SNe, respectively) tend toward lower [Si/O] and [C/O].\r\n\r\nAgainst these predictions, the contrast between the two absorber populations is clear. All nongalaxy O i systems (green crosses) fall at the lower left of the diagram, consistent with enrichment from both Population II and/or Population III SNe models. This regime also overlaps with ultra-metal-poor damped Lyman-α absorbers (DLAs) at z ∼ 3 (−0.5 ≲ [Si/O] ≲ 0, −0.5 ≲ [C/O] ≲ 0; R. Cooke et al. 2011; R. J. Cooke et al. 2017). By contrast, three of the five galaxy-associated absorbers lie well outside both the locus of Population II predictions and the locus of ultra-metal-poor DLA relative abundances. These systems are best explained if Population III enrichment played a major role, suggesting that they may represent a distinct population from ultra-metal-poor DLA host galaxies (see also A. Sodini et al. 2024).\r\n\r\nSimilarly, A. Sodini et al. (2024) found that the [C/O] and [Si/O] abundance ratios for high-redshift O i absorber systems are consistent with significant enrichment from Population III, with the majority explained by ≥ 30% contributions. They also find a large spread in the implied Population III contribution; several systems require ≥ 60% contributions, while others fall significantly below the average. This is a strong indication of heterogeneous chemical enrichment by Population III stars during the epoch of reionization.\r\n\r\nThe absorber toward J159 at z = 5.91 shows [C/O] = 0.20, [Si/O] = 0.55 (labeled c), and no evidence of high-ionization absorption. These abundance ratios are best explained by contributions from Population III SNe or hypernovae. The absorber toward J1030 at z = 6.07 ([C/O] = −0.38, [Si/O] = 0.65, labeled e) also shows no high-ionization absorption. The relative abundances in these two predominantly neutral systems are therefore quite robust. Interestingly, the J1030 system is not reproduced by any single Population II or Population III model, suggesting that it may have experienced multiple enrichment episodes, producing unusually high [Si/O] coupled with low [C/O].\r\n\r\nTwo cases require special mention. The absorber toward J0100 at z = 5.94 shows [C/O] ≥ 0.42 and [Si/O] ≥ 0.67 (labeled a), with strong C iv and Si iv absorption. Since these are lower limits, ionization corrections (for carbon and silicon) would push this system further upward, strengthening the case for Population III contributions. This observation is best explained by contributions from Population III hypernovae models. The J1148 absorber at z = 6.01 shows [C/O] ≥ 0.02 and [Si/O] ≥ 0.20 (labeled b), again with high-ionization lines; correcting for ionization would shift it diagonally upward in the diagram. Taken together, four of the five galaxy-associated absorbers show relative abundances that cannot be explained by Population II models alone, pointing instead to significant enrichment from Population III SNe or hypernovae.\r\n\r\nThus, most galaxy-associated O i systems carry signatures of Population III enrichment. These results suggest that O i systems tracing galaxy overdensities at z ∼ 6 carry chemical signatures of Population III enrichment, likely from multiple SNe events rather than a single explosion. The elevated [Si/O] and [C/O] ratios in these environments imply that [O iii]—emitting galaxies at this epoch may retain significant Population III contributions, and that metal-line absorbers around such overdensities provide a powerful probe of the first generations of stars.\r\n\r\n4.4. Comparison to the z ≈ 0 Universe\r\nAt z ∼ 6, we cannot directly detect the local environments where O i absorption systems arise. However, at z ∼ 0, there are instances where the environments giving rise to O i absorption are well understood. Here, we discuss several such instances and compare them with z ∼ 6 observations. Such comparisons can provide useful insights regarding the nature of local environments within which O i systems exist at high z. We focus on O i absorption associated with local blue compact dwarf (BCD) galaxies and the Magellanic Stream (MS), owing to their low metallicities and well-characterized local environments.\r\n\r\nThere is evidence that O i is found preferentially in the H ii regions of local BCDs, with their H i regions being pristine or showing very low levels of enrichment (D. Kunth et al. 1994; M. Pettini & K. Lipman 1995; T. X. Thuan & Y. I. Izotov 1997). In particular, T. X. Thuan & Y. I. Izotov (1997) report that, to varying degrees, low-ionization metal lines (e.g., O i and Si ii) reside in the ionized hydrogen regions of BCDs rather than the neutral hydrogen regions. They report . Compared to the z ∼ 6 measurements in panel (b) of Figure 7, the O i column density of the BCD is comparable, but the Si ii-to-O i ratio is inconsistent with the z ∼ 6 values. On the other hand, V. Lebouteiller et al. (2004) find that the H ii region of the BCD I Zw 36 has significantly higher metallicity than its H i region. However, inferred from velocity offsets, O i in that system is associated with the H i region. The reported O i column density of that BCD () is approximately 2 orders of magnitude higher than the z ∼ 6 sample. Given the available evidence, we conclude that the observed z ∼ 6 O i absorption systems are not similar to local BCD systems and are unlikely to originate in H ii regions.\r\n\r\nThe MS is a filamentary trail of gas in the Local Group. Multiphase absorption-line observations from A. J. Fox et al. (2013) and P. Richter et al. (2013) support the argument that the MS was tidally stripped from the Magellanic Clouds approximately 2 Gyr ago. Inferences from the abundance ratios of alpha elements in the MS are best explained by contributions from massive stars via Type II SNe when the MS was still part of the Magellanic Clouds, although the presence of significant dust depletion makes further inferences into enrichment history difficult. An additional study of the MS (N. Kumari et al. 2015) reports abundance ratios in a compact high-velocity cloud (CHVC) that is believed to be associated with the MS. They find [Si/O] = −0.04 ± 0.25 and [C/O] = −0.09 ± 0.23. When comparing these with the z ∼ 6 observations presented in panel (c) of Figure 7, we see that the CHVC abundance ratios occupy a different region of parameter space than the z ≈ 6 O i absorbers within identified galactic overdensities showing Population III enrichment signatures (points a, c, e). This discrepancy provides evidence that these z ∼ 6 O i absorbers with Population III enrichment signatures are unlikely to arise in environments similar to the MS. However, the ionic ratios of O i absorption systems not associated with galaxy overdensities (green crosses) are consistent with this measurement. With the caveat that MS measurements do contain dust depletion effects, it is plausible that such O i systems may trace IGM structures with densities comparable to those of the MS at high z.\r\n\r\n5. Conclusion\r\nWe have conducted a survey of neutral O i absorption systems associated with galaxies during the Epoch of Reionization in the EIGER survey, using six high-redshift quasars as background sight lines. Our study focuses on the distribution of neutral oxygen around -emitting galaxies within 300 kpc and their connection to galaxy overdensities. The main results are as follows:\r\n\r\n1. \r\nFive O i absorbers are detected among 15 galaxy overdensities, spanning z = 5.91–6.16 with a mean redshift 〈z〉 = 6.001.\r\n2. \r\nThe O i covering fraction within 300 kpc of the closest galaxy is , with for R ≤ 50 kpc and for 50 ≤ R ≤ 300 kpc, where the covering fraction is calculated using the galaxy in an overdensity with the lowest impact parameter.\r\n3. \ \r\nWe find ≳ 2 × 106 M⊙ of oxygen within 300 kpc, a mass comparable to the ISM oxygen content of z ∼ 6 galaxies—assuming minimal ionization correction (see Section 4.1 for justification)—suggesting that the circumgalactic environment already holds metal reservoirs rivaling those inside galaxies.\r\n4. \r\nO i absorbers are detected as far as ∼8 R/Rvir from galaxies, in sharp contrast to low-ionization tracers such as Mg ii, which are typically confined within ≲R/Rvir.\r\n5. \r\nThe incidence of galaxy-associated O i absorbers is \r\n \r\n. Comparison with blind quasar absorption-line surveys indicates that these systems represent only ∼35% of all O i absorbers at z ∼ 6, implying that the majority likely arise in lower-mass galaxies below current detection limits or in dense neutral IGM pockets that survived reionization.\r\n6. \ \r\nRelative abundance and ionization ratios ([Si/O], [C/O]) show that galaxy-associated O i systems are chemically enriched, with signatures in several systems consistent with contributions from Population III stars. In particular, we identify four galaxy overdensities whose outskirts exhibit absorption-line abundance ratios consistent with contributions from Population III nucleosynthesis.\r\n\r\nOverall, these results indicate that neutral O i at z ∼ 6 primarily traces extended overdensity environments rather than the CGM of individual halos. Moreover, the chemical abundance patterns of galaxy-associated O i systems suggest contributions from Population III stars, likely arising from multiple SNe events rather than a single explosion. The elevated [Si/O] and [C/O] ratios imply that [O iii]-emitting galaxies at this epoch may retain significant Population III enrichment. Consequently, metal-line absorbers around such overdensities offer a powerful probe of the first generations of stars, providing insight into early chemical enrichment and the role of primordial stellar populations in shaping galaxy evolution during the Epoch of Reionization.\r\n\r\nAcknowledgments\r\nThis work is based on observations made with the NASA/ESA/CSA James Webb Space Telescope. The data were obtained from the Mikulski Archive for Space Telescopes at the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 5-03127 for JWST. These observations are associated with program #1243. This paper includes data gathered with the 6.5 m Magellan Telescopes located at Las Campanas Observatory, Chile. This work was supported by a NASA Keck PI Data Award, administered by the NASA Exoplanet Science Institute. Data presented herein were obtained at the W. M. Keck Observatory from telescope time allocated to the National Aeronautics and Space Administration (NASA) through the agency’s scientific partnership with the California Institute of Technology and the University of California. The Observatory was made possible by the generous financial support of the W. M. Keck Foundation. The JWST data presented in this article were obtained from the Mikulski Archive for Space Telescopes (MAST) at the Space Telescope Science Institute. The specific observations analyzed can be accessed via DOI: 10.17909/y94q-h212. This work was partially supported by the National Science Foundation under grant No. AST-2108931. Jorryt Matthee and Ivan Kramarenko acknowledge funding from the European Union (ERC, AGENTS, 101076224).\r\n\r\nFacilities: JWST - James Webb Space Telescope (NIRCam), Magellan: Baade - (FIRE), VLT: Kueyen - (X-shooter), and Keck: I - (HIRES, MOSFIRE).\r\n\r\nSoftware: astropy (Astropy Collaboration et al. 2013, 2018, 2022), rbcodes (R. Bordoloi et al. 2025), rbvfit (R. Bordoloi & J. Higginson 2025)." article_number: '49' article_processing_charge: Yes article_type: original arxiv: 1 author: - first_name: Jack full_name: Higginson, Jack last_name: Higginson - first_name: Rongmon full_name: Bordoloi, Rongmon last_name: Bordoloi - first_name: Robert A. full_name: Simcoe, Robert A. last_name: Simcoe - first_name: Jorryt J full_name: Matthee, Jorryt J id: 7439a258-f3c0-11ec-9501-9df22fe06720 last_name: Matthee orcid: 0000-0003-2871-127X - first_name: Daichi full_name: Kashino, Daichi last_name: Kashino - first_name: Ruari full_name: Mackenzie, Ruari last_name: Mackenzie - first_name: Ivan full_name: Kramarenko, Ivan id: 9a9394cb-3200-11ee-973b-f5ba2a8b16e4 last_name: Kramarenko orcid: 0000-0001-5346-6048 - first_name: Simon J. full_name: Lilly, Simon J. last_name: Lilly - first_name: Anna-Christina full_name: Eilers, Anna-Christina last_name: Eilers - first_name: Rohan P. full_name: Naidu, Rohan P. last_name: Naidu - first_name: Minghao full_name: Yue, Minghao last_name: Yue citation: ama: Higginson J, Bordoloi R, Simcoe RA, et al. EIGER. VIII. First stars signatures in the connection between O I absorption and galaxies in the epoch of reionization. The Astrophysical Journal. 2026;999(1). doi:10.3847/1538-4357/ae3e81 apa: Higginson, J., Bordoloi, R., Simcoe, R. A., Matthee, J. J., Kashino, D., Mackenzie, R., … Yue, M. (2026). EIGER. VIII. First stars signatures in the connection between O I absorption and galaxies in the epoch of reionization. The Astrophysical Journal. IOP Publishing. https://doi.org/10.3847/1538-4357/ae3e81 chicago: Higginson, Jack, Rongmon Bordoloi, Robert A. Simcoe, Jorryt J Matthee, Daichi Kashino, Ruari Mackenzie, Ivan Kramarenko, et al. “EIGER. VIII. First Stars Signatures in the Connection between O I Absorption and Galaxies in the Epoch of Reionization.” The Astrophysical Journal. IOP Publishing, 2026. https://doi.org/10.3847/1538-4357/ae3e81. ieee: J. Higginson et al., “EIGER. VIII. First stars signatures in the connection between O I absorption and galaxies in the epoch of reionization,” The Astrophysical Journal, vol. 999, no. 1. IOP Publishing, 2026. ista: Higginson J, Bordoloi R, Simcoe RA, Matthee JJ, Kashino D, Mackenzie R, Kramarenko I, Lilly SJ, Eilers A-C, Naidu RP, Yue M. 2026. EIGER. VIII. First stars signatures in the connection between O I absorption and galaxies in the epoch of reionization. The Astrophysical Journal. 999(1), 49. mla: Higginson, Jack, et al. “EIGER. VIII. First Stars Signatures in the Connection between O I Absorption and Galaxies in the Epoch of Reionization.” The Astrophysical Journal, vol. 999, no. 1, 49, IOP Publishing, 2026, doi:10.3847/1538-4357/ae3e81. short: J. Higginson, R. Bordoloi, R.A. Simcoe, J.J. Matthee, D. Kashino, R. Mackenzie, I. Kramarenko, S.J. Lilly, A.-C. Eilers, R.P. Naidu, M. Yue, The Astrophysical Journal 999 (2026). date_created: 2026-10-12T12:15:27Z date_published: 2026-02-24T00:00:00Z date_updated: 2026-10-14T07:58:57Z day: '24' ddc: - '520' department: - _id: JoMa - _id: GradSch doi: 10.3847/1538-4357/ae3e81 external_id: arxiv: - '2510.05220' file: - access_level: open_access checksum: 1b8caf640c32d0d27a078bfb27ffcf8a content_type: application/pdf creator: dernst date_created: 2026-10-14T07:50:51Z date_updated: 2026-10-14T07:50:51Z file_id: '23136' file_name: 2026_AstrophysicalJour_Higginson.pdf file_size: 2808503 relation: main_file success: 1 file_date_updated: 2026-10-14T07:50:51Z fulldoi: https://doi.org/10.3847/1538-4357/ae3e81 has_accepted_license: '1' intvolume: ' 999' issue: '1' language: - iso: eng month: '02' oa: 1 oa_version: Published Version project: - _id: bd9b2118-d553-11ed-ba76-db24564edfea grant_number: '101076224' name: Young galaxies as tracers and agents of cosmic reionization publication: The Astrophysical Journal publication_identifier: eissn: - 1538-4357 issn: - 0004-637X publication_status: published publisher: IOP Publishing quality_controlled: '1' scopus_import: '1' status: public title: EIGER. VIII. First stars signatures in the connection between O I absorption and galaxies in the epoch of reionization tmp: image: /images/cc_by.png legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0) short: CC BY (4.0) type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 999 year: '2026' ... --- OA_place: publisher OA_type: hybrid PlanS_conform: '1' _id: '23123' abstract: - lang: eng text: "How many points can be placed in an \U0001D45B × \U0001D45B grid sothat every (affine) line contains at most \U0001D458 points? Weprove that for \U0001D45B ⩾ \U0001D458 ⩾ 1037 the maximum number ofpoints is exactly \U0001D458\U0001D45B. Our proof builds on the recent workof Kovács, Nagy and Szabó (who proved an analogousresult when \U0001D458 is at least about √\U0001D45B log \U0001D45B), incorporat-ing ideas of Jain and Pham. Using the same approach,we also obtain new bounds for higher-dimensionalextensions of this problem" acknowledgement: We would like to thank Huy Pham for insightful discussions about the proof approach, and wewould like to thank the anonymous referees for their careful reading and helpful comments. Bothauthors are supported by ERC Starting Grant “RANDSTRUCT” No. 101076777.Open Access funding provided by Institute of Science and Technology Austria. article_number: e70510 article_processing_charge: Yes (via OA deal) article_type: original author: - first_name: Aleksandr full_name: Grebennikov, Aleksandr id: 776468ec-50b0-11ef-861e-96ad19e894f3 last_name: Grebennikov - first_name: Matthew Alan full_name: Kwan, Matthew Alan id: 5fca0887-a1db-11eb-95d1-ca9d5e0453b3 last_name: Kwan orcid: 0000-0002-4003-7567 citation: ama: Grebennikov A, Kwan MA. No‐(k+1)‐in‐line problem for large constant k. Bulletin of the London Mathematical Society. 2026;58(10). doi:10.1112/blms.70510 apa: Grebennikov, A., & Kwan, M. A. (2026). No‐(k+1)‐in‐line problem for large constant k. Bulletin of the London Mathematical Society. Wiley. https://doi.org/10.1112/blms.70510 chicago: Grebennikov, Aleksandr, and Matthew Alan Kwan. “No‐(K+1)‐in‐line Problem for Large Constant K.” Bulletin of the London Mathematical Society. Wiley, 2026. https://doi.org/10.1112/blms.70510. ieee: A. Grebennikov and M. A. Kwan, “No‐(k+1)‐in‐line problem for large constant k,” Bulletin of the London Mathematical Society, vol. 58, no. 10. Wiley, 2026. ista: Grebennikov A, Kwan MA. 2026. No‐(k+1)‐in‐line problem for large constant k. Bulletin of the London Mathematical Society. 58(10), e70510. mla: Grebennikov, Aleksandr, and Matthew Alan Kwan. “No‐(K+1)‐in‐line Problem for Large Constant K.” Bulletin of the London Mathematical Society, vol. 58, no. 10, e70510, Wiley, 2026, doi:10.1112/blms.70510. short: A. Grebennikov, M.A. Kwan, Bulletin of the London Mathematical Society 58 (2026). corr_author: '1' das_tickbox: '0' date_created: 2026-10-12T13:57:47Z date_published: 2026-10-01T00:00:00Z date_updated: 2026-10-14T08:41:00Z day: '01' ddc: - '510' department: - _id: MaKw - _id: GradSch doi: 10.1112/blms.70510 file: - access_level: open_access checksum: cce830e3fc66174803b91103f5b88a29 content_type: application/pdf creator: dernst date_created: 2026-10-14T08:37:16Z date_updated: 2026-10-14T08:37:16Z file_id: '23139' file_name: 2026_BulletinLondonMathSoc_Grebennikov.pdf file_size: 284851 relation: main_file success: 1 file_date_updated: 2026-10-14T08:37:16Z fulldoi: https://doi.org/10.1112/blms.70510 has_accepted_license: '1' intvolume: ' 58' issue: '10' language: - iso: eng mathsc: - 05D40 - 52C10 - 52C35 month: '10' oa: 1 oa_version: Published Version project: - _id: bd95085b-d553-11ed-ba76-e55d3349be45 grant_number: '101076777' name: Randomness and structure in combinatorics publication: Bulletin of the London Mathematical Society publication_identifier: eissn: - 1469-2120 issn: - 0024-6093 publication_status: published publisher: Wiley quality_controlled: '1' researchdata_availability: no scopus_import: '1' status: public supplementarymaterial: no title: No‐(k+1)‐in‐line problem for large constant k tmp: image: /images/cc_by.png legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0) short: CC BY (4.0) type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 58 year: '2026' ... --- OA_place: publisher _id: '22984' acknowledged_ssus: - _id: Bio - _id: LifeSc - _id: MassSpec alternative_title: - ISTA Thesis article_processing_charge: No author: - first_name: Anastasiia full_name: Teplova, Anastasiia id: e3736151-106c-11ec-b916-c2558e2762c6 last_name: Teplova citation: ama: 'Teplova A. Chasing the elusive: Investigating nucleotide cyclase activity in gibberellin and strigolactone signalling; Cellular mechanisms of gravity sensing and response in roots. 2026. doi:10.15479/AT-ISTA-22984' apa: 'Teplova, A. (2026). Chasing the elusive: Investigating nucleotide cyclase activity in gibberellin and strigolactone signalling; Cellular mechanisms of gravity sensing and response in roots. Institute of Science and Technology Austria. https://doi.org/10.15479/AT-ISTA-22984' chicago: 'Teplova, Anastasiia. “Chasing the Elusive: Investigating Nucleotide Cyclase Activity in Gibberellin and Strigolactone Signalling; Cellular Mechanisms of Gravity Sensing and Response in Roots.” Institute of Science and Technology Austria, 2026. https://doi.org/10.15479/AT-ISTA-22984.' ieee: 'A. Teplova, “Chasing the elusive: Investigating nucleotide cyclase activity in gibberellin and strigolactone signalling; Cellular mechanisms of gravity sensing and response in roots,” Institute of Science and Technology Austria, 2026.' ista: 'Teplova A. 2026. Chasing the elusive: Investigating nucleotide cyclase activity in gibberellin and strigolactone signalling; Cellular mechanisms of gravity sensing and response in roots. Institute of Science and Technology Austria.' mla: 'Teplova, Anastasiia. Chasing the Elusive: Investigating Nucleotide Cyclase Activity in Gibberellin and Strigolactone Signalling; Cellular Mechanisms of Gravity Sensing and Response in Roots. Institute of Science and Technology Austria, 2026, doi:10.15479/AT-ISTA-22984.' short: 'A. Teplova, Chasing the Elusive: Investigating Nucleotide Cyclase Activity in Gibberellin and Strigolactone Signalling; Cellular Mechanisms of Gravity Sensing and Response in Roots, Institute of Science and Technology Austria, 2026.' corr_author: '1' date_created: 2026-09-23T15:29:42Z date_published: 2026-09-23T00:00:00Z date_updated: 2026-10-15T08:30:03Z day: '23' ddc: - '570' degree_awarded: PhD department: - _id: GradSch - _id: JiFr doi: 10.15479/AT-ISTA-22984 doi_confirm: '1' file: - access_level: closed checksum: ae6e37780e4a8d07cfabf0a899c6c6bf content_type: application/vnd.openxmlformats-officedocument.wordprocessingml.document creator: ateplova date_created: 2026-09-25T09:19:25Z date_updated: 2026-09-25T09:19:25Z file_id: '22996' file_name: 2026-Teplova-Anastasia-Thesis-final.docx file_size: 106736394 relation: source_file - access_level: closed checksum: 305099d360d30bd596af946171d19c3b content_type: application/pdf creator: ateplova date_created: 2026-09-25T09:25:56Z date_updated: 2026-09-25T09:25:56Z embargo: 2027-09-30 embargo_to: open_access file_id: '22997' file_name: 2026-Teplova-Anastasia-Thesis-final-pdfA.pdf file_size: 39343452 relation: main_file file_date_updated: 2026-09-25T09:25:56Z fulldoi: https://doi.org/10.15479/AT-ISTA-22984 has_accepted_license: '1' language: - iso: eng month: '09' oa_version: Published Version page: '190' publication_identifier: isbn: - 978-3-99078-093-0 issn: - '2663-337X ' publication_status: published publisher: Institute of Science and Technology Austria related_material: record: - id: '15257' relation: part_of_dissertation status: public status: public supervisor: - first_name: Jiří full_name: Friml, Jiří id: 4159519E-F248-11E8-B48F-1D18A9856A87 last_name: Friml orcid: 0000-0002-8302-7596 title: 'Chasing the elusive: Investigating nucleotide cyclase activity in gibberellin and strigolactone signalling; Cellular mechanisms of gravity sensing and response in roots' type: dissertation user_id: 8b945eb4-e2f2-11eb-945a-df72226e66a9 year: '2026' ... --- OA_place: publisher _id: '23079' abstract: - lang: eng text: "We study the computational aspects of the two central solution concepts of stochastic games\r\nplayed on finite graphs for an infinite number of steps: the value in two-player zero-sum\r\ngames, and Nash equilibria in multi-player games. In both settings, exact solutions are in\r\ntractable. Fortwo-playerzero-sumconcurrentstochasticgames,valuescanbeirrational,and\r\nthe associated decision problem is SQRT-SUM hard. For multi-player turn-based stochastic\r\ngames,theequilibriumprobabilitiescanbeirrational,anddecidingtheconstrainedexistence\r\nof a Nash equilibrium is undecidable in the presence of memory, and ∃R-complete when the\r\nplayers are restricted to stationary strategies. Hence, in both settings, the natural computational problem is the approximation of the solution within an arbitrary additive error. In\r\nthis thesis, we present improved complexity results and algorithms for such approximation\r\nproblems.\r\nThe first part of the thesis considers two-player zero-sum concurrent stochastic games\r\nwith two classic objectives: (a) stateful-discounted objectives, which are similar to the classic\r\ndiscounted-sum objectives, but states are associated with different discount factors rather\r\nthan a single discount factor; and (b) parity objectives, which are a canonical representation\r\nfor ω-regular objectives. For stateful-discounted objectives, given an ordering of the discount\r\nfactors, the limit value is the limit of the value of the stateful-discounted objectives, as\r\nthe discount factors approach zero according to the given order. The value-approximation\r\nproblem is known to be in EXPSPACE for the limit value of stateful-discounted objectives and\r\nin PSPACEforparityobjectives,andthebest-knownalgorithmsforbothproblemsareatleast\r\nexponential time, with an exponential dependence on the number of states and actions. Our\r\nmain results for the value-approximation problem for the limit value of stateful-discounted\r\nobjectives and parity objectives areas follows: (a)we establish TFNPNP complexity; and (b)we\r\npresent algorithms that improve the dependency on the number of actions in the exponent\r\nfrom linear to logarithmic. In particular, if the number of states is constant, our algorithms\r\nrun in polynomial time.\r\nThe second part of the thesis considers multi-player turn-based stochastic games with\r\nterminal payoffs, where the players are restricted to stationary strategies. We study the\r\napproximate constrained existence problem of Nash equilibria: given a game that has a Nash\r\nequilibrium in which the payoff of every player lies in a given interval, compute a strategy\r\nprofile that is an ε-Nash equilibrium and that satisfies the same constraints up to an additive\r\nerror ε. Our main results are as follows: (a) we present an FNPNP algorithm for the problem;\r\nand(b)we establish that its decision version is NP-hard, already with two players. For the\r\nupperbound,weshowthatifaconstrainedNashequilibriumexists,thenthereexists one\r\nin which the non-zero probabilities are at least an inverse of a double-exponential in the\r\ni\r\ninput size, and that such a strategy profile can be represented, up to an additive error ε, with\r\nfloating-point numbers of polynomial size. We complement the upper bound with a lower\r\nbound on this approach: we present a game with only five players in which every constrained\r\nNash equilibrium requires double-exponentially small probabilities.\r\nThe two parts share a common technical toolkit: bounds on solutions of systems of\r\npolynomial inequalities that arise from real algebraic geometry, the floating-point representation of doubly-exponentially small numbers, and guess-and-verify procedures that resolve\r\nsingle-player games with an NP oracle." acknowledgement: "The research reported in Part I was partially supported by the European Research\r\nCouncil (ERC) Consolidator Grant 863818 (ForM-SMArt), by the Austrian Science Fund\r\n(FWF) 10.55776/COE12, and by the French Agence Nationale de la Recherche (ANR) grant\r\nANR-21-CE40-0020 (CONVERGENCE project). The research reported in Part II is a part of\r\nproject VAMOS, which has received funding from the European Research Council (ERC) under\r\ngrant agreement No.101020093." alternative_title: - ISTA Master’s Thesis article_processing_charge: No author: - first_name: Ali full_name: Asadi, Ali id: 02d96aae-000e-11ec-b801-cadd0a5eefbb last_name: Asadi citation: ama: 'Asadi A. Approximation of values and equilibria in stochastic games: Complexity and algorithms. 2026. doi:10.15479/AT-ISTA-23079' apa: 'Asadi, A. (2026). Approximation of values and equilibria in stochastic games: Complexity and algorithms. Institute of Science and Technology Austria. https://doi.org/10.15479/AT-ISTA-23079' chicago: 'Asadi, Ali. “Approximation of Values and Equilibria in Stochastic Games: Complexity and Algorithms.” Institute of Science and Technology Austria, 2026. https://doi.org/10.15479/AT-ISTA-23079.' ieee: 'A. Asadi, “Approximation of values and equilibria in stochastic games: Complexity and algorithms,” Institute of Science and Technology Austria, 2026.' ista: 'Asadi A. 2026. Approximation of values and equilibria in stochastic games: Complexity and algorithms. Institute of Science and Technology Austria.' mla: 'Asadi, Ali. Approximation of Values and Equilibria in Stochastic Games: Complexity and Algorithms. Institute of Science and Technology Austria, 2026, doi:10.15479/AT-ISTA-23079.' short: 'A. Asadi, Approximation of Values and Equilibria in Stochastic Games: Complexity and Algorithms, Institute of Science and Technology Austria, 2026.' corr_author: '1' date_created: 2026-10-08T09:07:53Z date_published: 2026-10-09T00:00:00Z date_updated: 2026-10-16T08:00:45Z day: '09' ddc: - '000' degree_awarded: MS department: - _id: GradSch - _id: KrCh doi: 10.15479/AT-ISTA-23079 doi_confirm: '1' ec_funded: 1 file: - access_level: open_access checksum: c6b368f342409de884eafdd3af7867c5 content_type: application/pdf creator: aasadi date_created: 2026-10-09T11:12:08Z date_updated: 2026-10-12T13:13:51Z file_id: '23081' file_name: 2026_Asadi_Ali_Thesis.pdf file_size: 694682 relation: main_file - access_level: closed checksum: 71ecb0b666438f395a92b395e315f904 content_type: application/zip creator: aasadi date_created: 2026-10-09T11:12:56Z date_updated: 2026-10-09T11:47:47Z file_id: '23082' file_name: 2026_Asadi_Ali_Thesis.zip file_size: 1538723 relation: source_file file_date_updated: 2026-10-12T13:13:51Z fulldoi: https://doi.org/10.15479/AT-ISTA-23079 has_accepted_license: '1' language: - iso: eng month: '10' oa: 1 oa_version: Published Version page: '83' project: - _id: 0599E47C-7A3F-11EA-A408-12923DDC885E call_identifier: H2020 grant_number: '863818' name: 'Formal Methods for Stochastic Models: Algorithms and Applications' - _id: 4029cfc7-b034-11f1-9e55-88ab2ff3b6ee grant_number: COE12 name: Bilateral Artificial Intelligence (Chatterjee) - _id: 62781420-2b32-11ec-9570-8d9b63373d4d call_identifier: H2020 grant_number: '101020093' name: Vigilant Algorithmic Monitoring of Software publication_identifier: issn: - 2791-4585 publication_status: published publisher: Institute of Science and Technology Austria related_material: record: - id: '21281' relation: part_of_dissertation status: public - id: '17099' relation: part_of_dissertation status: public status: public supervisor: - first_name: Krishnendu full_name: Chatterjee, Krishnendu id: 2E5DCA20-F248-11E8-B48F-1D18A9856A87 last_name: Chatterjee orcid: 0000-0002-4561-241X title: 'Approximation of values and equilibria in stochastic games: Complexity and algorithms' tmp: image: /images/cc_by.png legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0) short: CC BY (4.0) type: dissertation user_id: 8b945eb4-e2f2-11eb-945a-df72226e66a9 year: '2026' ... --- OA_place: publisher _id: '22626' acknowledgement: 'This thesis and the publications within, were financially supported by the Institute of Science and Technology Austria and the Werner Siemens Foundation under the project “High Thermoelectric Materials: The Werner Siemens Laboratory for the High Throughput Discovery of Semiconductors for Waste Heat Recovery”.' alternative_title: - ISTA Thesis article_processing_charge: No author: - first_name: Christine full_name: Fiedler, Christine id: bd3fceba-dc74-11ea-a0a7-c17f71817366 last_name: Fiedler citation: ama: Fiedler C. Mechanistic insight into solution-processed p-type tin chalcogenides as a basis for designing their n-type analogs. 2026. doi:10.15479/AT-ISTA-22626 apa: Fiedler, C. (2026). Mechanistic insight into solution-processed p-type tin chalcogenides as a basis for designing their n-type analogs. Institute of Science and Technology Austria. https://doi.org/10.15479/AT-ISTA-22626 chicago: Fiedler, Christine. “Mechanistic Insight into Solution-Processed p-Type Tin Chalcogenides as a Basis for Designing Their n-Type Analogs.” Institute of Science and Technology Austria, 2026. https://doi.org/10.15479/AT-ISTA-22626. ieee: C. Fiedler, “Mechanistic insight into solution-processed p-type tin chalcogenides as a basis for designing their n-type analogs,” Institute of Science and Technology Austria, 2026. ista: Fiedler C. 2026. Mechanistic insight into solution-processed p-type tin chalcogenides as a basis for designing their n-type analogs. Institute of Science and Technology Austria. mla: Fiedler, Christine. Mechanistic Insight into Solution-Processed p-Type Tin Chalcogenides as a Basis for Designing Their n-Type Analogs. Institute of Science and Technology Austria, 2026, doi:10.15479/AT-ISTA-22626. short: C. Fiedler, Mechanistic Insight into Solution-Processed p-Type Tin Chalcogenides as a Basis for Designing Their n-Type Analogs, Institute of Science and Technology Austria, 2026. corr_author: '1' date_created: 2026-08-03T07:55:16Z date_published: 2026-08-05T00:00:00Z date_updated: 2026-10-16T09:30:26Z day: '05' ddc: - '540' - '546' - '530' degree_awarded: PhD department: - _id: GradSch - _id: MaIb doi: 10.15479/AT-ISTA-22626 doi_confirm: '1' file: - access_level: closed checksum: 4f357f3c0f5ee3d679dd0395dbafc4bb content_type: application/vnd.openxmlformats-officedocument.wordprocessingml.document creator: cfiedler date_created: 2026-08-07T09:10:56Z date_updated: 2026-08-07T10:02:41Z file_id: '22659' file_name: 2026_Fiedler_Christine_Thesis.docx file_size: 625541367 relation: source_file - access_level: closed checksum: 69784d2e7b9ef3d3a0fbe134f3bba089 content_type: application/pdf creator: cfiedler date_created: 2026-08-07T09:10:45Z date_updated: 2026-08-07T10:16:07Z embargo: 2027-02-07 embargo_to: open_access file_id: '22660' file_name: 2026_Fiedler_Christine_Thesis.pdf file_size: 16646551 relation: main_file file_date_updated: 2026-08-07T10:16:07Z fulldoi: https://doi.org/10.15479/AT-ISTA-22626 has_accepted_license: '1' language: - iso: eng month: '08' oa_version: Published Version page: '141' project: - _id: 9B8F7476-BA93-11EA-9121-9846C619BF3A name: 'HighTE: The Werner Siemens Laboratory for the High Throughput Discovery of Semiconductors for Waste Heat Recovery' publication_identifier: isbn: - 978-3-99078-086-2 issn: - 2663-337X publication_status: published publisher: Institute of Science and Technology Austria related_material: record: - id: '12237' relation: part_of_dissertation status: public - id: '17124' relation: part_of_dissertation status: public - id: '17052' relation: part_of_dissertation status: public status: public supervisor: - first_name: Maria full_name: Ibáñez, Maria id: 43C61214-F248-11E8-B48F-1D18A9856A87 last_name: Ibáñez orcid: 0000-0001-5013-2843 title: Mechanistic insight into solution-processed p-type tin chalcogenides as a basis for designing their n-type analogs tmp: image: /images/cc_by.png legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0) short: CC BY (4.0) type: dissertation user_id: 8b945eb4-e2f2-11eb-945a-df72226e66a9 year: '2026' ... --- OA_place: publisher _id: '22017' alternative_title: - ISTA Thesis article_processing_charge: No author: - first_name: Tobias full_name: Kleinhanns, Tobias id: 8BD9DE16-AB3C-11E9-9C8C-2A03E6697425 last_name: Kleinhanns orcid: 0000-0003-1537-7436 citation: ama: Kleinhanns T. Unraveling the origin and evolution of defects to enable advanced thermoelectric performance. 2026. doi:10.15479/AT-ISTA-22017 apa: Kleinhanns, T. (2026). Unraveling the origin and evolution of defects to enable advanced thermoelectric performance. Institute of Science and Technology Austria. https://doi.org/10.15479/AT-ISTA-22017 chicago: Kleinhanns, Tobias. “Unraveling the Origin and Evolution of Defects to Enable Advanced Thermoelectric Performance.” Institute of Science and Technology Austria, 2026. https://doi.org/10.15479/AT-ISTA-22017. ieee: T. Kleinhanns, “Unraveling the origin and evolution of defects to enable advanced thermoelectric performance,” Institute of Science and Technology Austria, 2026. ista: Kleinhanns T. 2026. Unraveling the origin and evolution of defects to enable advanced thermoelectric performance. Institute of Science and Technology Austria. mla: Kleinhanns, Tobias. Unraveling the Origin and Evolution of Defects to Enable Advanced Thermoelectric Performance. Institute of Science and Technology Austria, 2026, doi:10.15479/AT-ISTA-22017. short: T. Kleinhanns, Unraveling the Origin and Evolution of Defects to Enable Advanced Thermoelectric Performance, Institute of Science and Technology Austria, 2026. corr_author: '1' das_tickbox: '1' date_created: 2026-06-18T08:00:03Z date_published: 2026-06-18T00:00:00Z date_updated: 2026-10-16T10:07:25Z day: '18' ddc: - '546' - '530' degree_awarded: PhD department: - _id: GradSch - _id: MaIb doi: 10.15479/AT-ISTA-22017 doi_confirm: '1' file: - access_level: closed checksum: 3df7e865a7d1da8972ccd8acb8b4c16c content_type: application/vnd.openxmlformats-officedocument.wordprocessingml.document creator: tkleinha date_created: 2026-06-30T09:17:15Z date_updated: 2026-06-30T09:17:15Z file_id: '22226' file_name: 2026_Kleinhanns_Tobias_Thesis_Source_File.docx file_size: 15658266 relation: source_file - access_level: closed checksum: 40ec279272a963636ff29c964032dcba content_type: application/pdf creator: tkleinha date_created: 2026-07-01T07:35:17Z date_updated: 2026-07-01T07:35:17Z embargo: 2026-12-18 embargo_to: open_access file_id: '22232' file_name: 2026_Kleinhanns_Tobias_Thesis_Main_File_A4.pdf file_size: 9909375 relation: main_file file_date_updated: 2026-07-01T07:35:17Z fulldoi: https://doi.org/10.15479/AT-ISTA-22017 has_accepted_license: '1' language: - iso: eng month: '06' oa_version: Published Version page: '59' project: - _id: 9B8F7476-BA93-11EA-9121-9846C619BF3A name: 'HighTE: The Werner Siemens Laboratory for the High Throughput Discovery of Semiconductors for Waste Heat Recovery' publication_identifier: isbn: - 978-3-99078-081-7 issn: - 2663-337X publication_status: published publisher: Institute of Science and Technology Austria related_material: record: - id: '12237' relation: part_of_dissertation status: public - id: '20326' relation: part_of_dissertation status: public - id: '15182' relation: part_of_dissertation status: public status: public supervisor: - first_name: Maria full_name: Ibáñez, Maria id: 43C61214-F248-11E8-B48F-1D18A9856A87 last_name: Ibáñez orcid: 0000-0001-5013-2843 title: Unraveling the origin and evolution of defects to enable advanced thermoelectric performance type: dissertation user_id: 8b945eb4-e2f2-11eb-945a-df72226e66a9 year: '2026' ...