--- _id: '13371' abstract: - lang: eng text: Diamondoid nanoporous crystals represent a synthetically challenging class of materials that typically have been obtained from tetrahedral building blocks. In this issue of Chem, Stoddart and coworkers demonstrate that it is possible to generate diamondoid frameworks from a hexacationic building block lacking a tetrahedral symmetry. These results highlight the great potential of self-assembly for rapidly transforming small molecules into structurally complex functional materials. article_processing_charge: No article_type: original author: - first_name: Michał J. full_name: Białek, Michał J. last_name: Białek - first_name: Rafal full_name: Klajn, Rafal id: 8e84690e-1e48-11ed-a02b-a1e6fb8bb53b last_name: Klajn citation: ama: Białek MJ, Klajn R. Diamond grows up. Chem. 2019;5(9):2283-2285. doi:10.1016/j.chempr.2019.08.012 apa: Białek, M. J., & Klajn, R. (2019). Diamond grows up. Chem. Elsevier. https://doi.org/10.1016/j.chempr.2019.08.012 chicago: Białek, Michał J., and Rafal Klajn. “Diamond Grows Up.” Chem. Elsevier, 2019. https://doi.org/10.1016/j.chempr.2019.08.012. ieee: M. J. Białek and R. Klajn, “Diamond grows up,” Chem, vol. 5, no. 9. Elsevier, pp. 2283–2285, 2019. ista: Białek MJ, Klajn R. 2019. Diamond grows up. Chem. 5(9), 2283–2285. mla: Białek, Michał J., and Rafal Klajn. “Diamond Grows Up.” Chem, vol. 5, no. 9, Elsevier, 2019, pp. 2283–85, doi:10.1016/j.chempr.2019.08.012. short: M.J. Białek, R. Klajn, Chem 5 (2019) 2283–2285. date_created: 2023-08-01T09:38:38Z date_published: 2019-09-12T00:00:00Z date_updated: 2024-10-14T12:14:05Z day: '12' doi: 10.1016/j.chempr.2019.08.012 extern: '1' intvolume: ' 5' issue: '9' keyword: - Materials Chemistry - Biochemistry (medical) - General Chemical Engineering - Environmental Chemistry - Biochemistry - General Chemistry language: - iso: eng main_file_link: - open_access: '1' url: https://doi.org/10.1016/j.chempr.2019.08.012 month: '09' oa: 1 oa_version: Published Version page: 2283-2285 publication: Chem publication_identifier: eissn: - 2451-9294 issn: - 2451-9308 publication_status: published publisher: Elsevier quality_controlled: '1' scopus_import: '1' status: public title: Diamond grows up type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 5 year: '2019' ... --- _id: '13372' abstract: - lang: eng text: 'The capacity to respond or adapt to environmental changes is an intrinsic property of living systems that comprise highly-connected subcomponents communicating through chemical networks. The development of responsive synthetic systems is a relatively new research area that covers different disciplines, among which nanochemistry brings conceptually new demonstrations. Especially attractive are ligand-protected gold nanoparticles, which have been extensively used over the last decade as building blocks in constructing superlattices or dynamic aggregates, under the effect of an applied stimulus. To reflect the importance of surface chemistry and nanoparticle core composition in the dynamic self-assembly of nanoparticles, we provide here an overview of various available stimuli, as tools for synthetic chemists to exploit. Along with this task, the review starts with the use of chemical stimuli such as solvent, pH, gases, metal ions or biomolecules. It then focuses on physical stimuli: temperature, magnetic and electric fields, as well as light. To reflect on the increasing complexity of current architectures, we discuss systems that are responsive to more than one stimulus, to finally encourage further research by proposing future challenges.' article_processing_charge: No article_type: original author: - first_name: Marek full_name: Grzelczak, Marek last_name: Grzelczak - first_name: Luis M. full_name: Liz-Marzán, Luis M. last_name: Liz-Marzán - first_name: Rafal full_name: Klajn, Rafal id: 8e84690e-1e48-11ed-a02b-a1e6fb8bb53b last_name: Klajn citation: ama: Grzelczak M, Liz-Marzán LM, Klajn R. Stimuli-responsive self-assembly of nanoparticles. Chemical Society Reviews. 2019;48(5):1342-1361. doi:10.1039/c8cs00787j apa: Grzelczak, M., Liz-Marzán, L. M., & Klajn, R. (2019). Stimuli-responsive self-assembly of nanoparticles. Chemical Society Reviews. Royal Society of Chemistry. https://doi.org/10.1039/c8cs00787j chicago: Grzelczak, Marek, Luis M. Liz-Marzán, and Rafal Klajn. “Stimuli-Responsive Self-Assembly of Nanoparticles.” Chemical Society Reviews. Royal Society of Chemistry, 2019. https://doi.org/10.1039/c8cs00787j. ieee: M. Grzelczak, L. M. Liz-Marzán, and R. Klajn, “Stimuli-responsive self-assembly of nanoparticles,” Chemical Society Reviews, vol. 48, no. 5. Royal Society of Chemistry, pp. 1342–1361, 2019. ista: Grzelczak M, Liz-Marzán LM, Klajn R. 2019. Stimuli-responsive self-assembly of nanoparticles. Chemical Society Reviews. 48(5), 1342–1361. mla: Grzelczak, Marek, et al. “Stimuli-Responsive Self-Assembly of Nanoparticles.” Chemical Society Reviews, vol. 48, no. 5, Royal Society of Chemistry, 2019, pp. 1342–61, doi:10.1039/c8cs00787j. short: M. Grzelczak, L.M. Liz-Marzán, R. Klajn, Chemical Society Reviews 48 (2019) 1342–1361. date_created: 2023-08-01T09:38:52Z date_published: 2019-01-28T00:00:00Z date_updated: 2024-10-14T12:14:14Z day: '28' doi: 10.1039/c8cs00787j extern: '1' external_id: pmid: - '30688963' intvolume: ' 48' issue: '5' keyword: - General Chemistry language: - iso: eng main_file_link: - open_access: '1' url: https://doi.org/10.1039/C8CS00787J month: '01' oa: 1 oa_version: Published Version page: 1342-1361 pmid: 1 publication: Chemical Society Reviews publication_identifier: eissn: - 1460-4744 issn: - 0306-0012 publication_status: published publisher: Royal Society of Chemistry quality_controlled: '1' scopus_import: '1' status: public title: Stimuli-responsive self-assembly of nanoparticles type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 48 year: '2019' ... --- _id: '13373' abstract: - lang: eng text: The reversible photoisomerization of azobenzene has been utilized to construct a plethora of systems in which optical, electronic, catalytic, and other properties can be controlled by light. However, owing to azobenzene’s hydrophobic nature, most of these examples have been realized only in organic solvents, and systems operating in water are relatively scarce. Here, we show that by coadsorbing the inherently hydrophobic azobenzenes with water-solubilizing ligands on the same nanoparticulate platforms, it is possible to render them essentially water-soluble. To this end, we developed a modified nanoparticle functionalization procedure allowing us to precisely fine-tune the amount of azobenzene on the functionalized nanoparticles. Molecular dynamics simulations helped us to identify two distinct supramolecular architectures (depending on the length of the background ligand) on these nanoparticles, which can explain their excellent aqueous solubilities. Azobenzenes adsorbed on these water-soluble nanoparticles exhibit highly reversible photoisomerization upon exposure to UV and visible light. Importantly, the mixed-monolayer approach allowed us to systematically investigate how the background ligand affects the switching properties of azobenzene. We found that the nature of the background ligand has a profound effect on the kinetics of azobenzene switching. For example, a hydroxy-terminated background ligand is capable of accelerating the back-isomerization reaction by more than 6000-fold. These results pave the way toward the development of novel light-responsive nanomaterials operating in aqueous media and, in the long run, in biological environments. article_processing_charge: No article_type: original author: - first_name: Zonglin full_name: Chu, Zonglin last_name: Chu - first_name: Yanxiao full_name: Han, Yanxiao last_name: Han - first_name: Tong full_name: Bian, Tong last_name: Bian - first_name: Soumen full_name: De, Soumen last_name: De - first_name: Petr full_name: Král, Petr last_name: Král - first_name: Rafal full_name: Klajn, Rafal id: 8e84690e-1e48-11ed-a02b-a1e6fb8bb53b last_name: Klajn citation: ama: Chu Z, Han Y, Bian T, De S, Král P, Klajn R. Supramolecular control of azobenzene switching on nanoparticles. Journal of the American Chemical Society. 2019;141(5):1949-1960. doi:10.1021/jacs.8b09638 apa: Chu, Z., Han, Y., Bian, T., De, S., Král, P., & Klajn, R. (2019). Supramolecular control of azobenzene switching on nanoparticles. Journal of the American Chemical Society. American Chemical Society. https://doi.org/10.1021/jacs.8b09638 chicago: Chu, Zonglin, Yanxiao Han, Tong Bian, Soumen De, Petr Král, and Rafal Klajn. “Supramolecular Control of Azobenzene Switching on Nanoparticles.” Journal of the American Chemical Society. American Chemical Society, 2019. https://doi.org/10.1021/jacs.8b09638. ieee: Z. Chu, Y. Han, T. Bian, S. De, P. Král, and R. Klajn, “Supramolecular control of azobenzene switching on nanoparticles,” Journal of the American Chemical Society, vol. 141, no. 5. American Chemical Society, pp. 1949–1960, 2019. ista: Chu Z, Han Y, Bian T, De S, Král P, Klajn R. 2019. Supramolecular control of azobenzene switching on nanoparticles. Journal of the American Chemical Society. 141(5), 1949–1960. mla: Chu, Zonglin, et al. “Supramolecular Control of Azobenzene Switching on Nanoparticles.” Journal of the American Chemical Society, vol. 141, no. 5, American Chemical Society, 2019, pp. 1949–60, doi:10.1021/jacs.8b09638. short: Z. Chu, Y. Han, T. Bian, S. De, P. Král, R. Klajn, Journal of the American Chemical Society 141 (2019) 1949–1960. date_created: 2023-08-01T09:39:19Z date_published: 2019-02-06T00:00:00Z date_updated: 2024-10-14T12:14:23Z day: '06' doi: 10.1021/jacs.8b09638 extern: '1' external_id: pmid: - '30595017' intvolume: ' 141' issue: '5' keyword: - Colloid and Surface Chemistry - Biochemistry - General Chemistry - Catalysis language: - iso: eng month: '02' oa_version: Published Version page: 1949-1960 pmid: 1 publication: Journal of the American Chemical Society publication_identifier: eissn: - 1520-5126 issn: - 0002-7863 publication_status: published publisher: American Chemical Society quality_controlled: '1' scopus_import: '1' status: public title: Supramolecular control of azobenzene switching on nanoparticles type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 141 year: '2019' ... --- _id: '13468' abstract: - lang: eng text: Hydrogen-rich supernovae, known as Type II (SNe II), are the most common class of explosions observed following the collapse of the core of massive stars. We used analytical estimates and population synthesis simulations to assess the fraction of SNe II progenitors that are expected to have exchanged mass with a companion prior to explosion. We estimate that 1/3 to 1/2 of SN II progenitors have a history of mass exchange with a binary companion before exploding. The dominant binary channels leading to SN II progenitors involve the merger of binary stars. Mergers are expected to produce a diversity of SN II progenitor characteristics, depending on the evolutionary timing and properties of the merger. Alternatively, SN II progenitors from interacting binaries may have accreted mass from their companion, and subsequently been ejected from the binary system after their companion exploded. We show that the overall fraction of SN II progenitors that are predicted to have experienced binary interaction is robust against the main physical uncertainties in our models. However, the relative importance of different binary evolutionary channels is affected by changing physical assumptions. We further discuss ways in which binarity might contribute to the observed diversity of SNe II by considering potential observational signatures arising from each binary channel. For supernovae which have a substantial H-rich envelope at explosion (i.e., excluding Type IIb SNe), a surviving non-compact companion would typically indicate that the supernova progenitor star was in a wide, non-interacting binary. We argue that a significant fraction of even Type II-P SNe are expected to have gained mass from a companion prior to explosion. article_number: A5 article_processing_charge: No article_type: original arxiv: 1 author: - first_name: Emmanouil full_name: Zapartas, Emmanouil last_name: Zapartas - first_name: Selma E. full_name: de Mink, Selma E. last_name: de Mink - first_name: Stephen full_name: Justham, Stephen last_name: Justham - first_name: Nathan full_name: Smith, Nathan last_name: Smith - first_name: Alex full_name: de Koter, Alex last_name: de Koter - first_name: Mathieu full_name: Renzo, Mathieu last_name: Renzo - first_name: Iair full_name: Arcavi, Iair last_name: Arcavi - first_name: Rob full_name: Farmer, Rob last_name: Farmer - first_name: Ylva Louise Linsdotter full_name: Götberg, Ylva Louise Linsdotter id: d0648d0c-0f64-11ee-a2e0-dd0faa2e4f7d last_name: Götberg orcid: 0000-0002-6960-6911 - first_name: Silvia full_name: Toonen, Silvia last_name: Toonen citation: ama: 'Zapartas E, de Mink SE, Justham S, et al. The diverse lives of progenitors of hydrogen-rich core-collapse supernovae: The role of binary interaction. Astronomy & Astrophysics. 2019;631. doi:10.1051/0004-6361/201935854' apa: 'Zapartas, E., de Mink, S. E., Justham, S., Smith, N., de Koter, A., Renzo, M., … Toonen, S. (2019). The diverse lives of progenitors of hydrogen-rich core-collapse supernovae: The role of binary interaction. Astronomy & Astrophysics. EDP Sciences. https://doi.org/10.1051/0004-6361/201935854' chicago: 'Zapartas, Emmanouil, Selma E. de Mink, Stephen Justham, Nathan Smith, Alex de Koter, Mathieu Renzo, Iair Arcavi, Rob Farmer, Ylva Louise Linsdotter Götberg, and Silvia Toonen. “The Diverse Lives of Progenitors of Hydrogen-Rich Core-Collapse Supernovae: The Role of Binary Interaction.” Astronomy & Astrophysics. EDP Sciences, 2019. https://doi.org/10.1051/0004-6361/201935854.' ieee: 'E. Zapartas et al., “The diverse lives of progenitors of hydrogen-rich core-collapse supernovae: The role of binary interaction,” Astronomy & Astrophysics, vol. 631. EDP Sciences, 2019.' ista: 'Zapartas E, de Mink SE, Justham S, Smith N, de Koter A, Renzo M, Arcavi I, Farmer R, Götberg YLL, Toonen S. 2019. The diverse lives of progenitors of hydrogen-rich core-collapse supernovae: The role of binary interaction. Astronomy & Astrophysics. 631, A5.' mla: 'Zapartas, Emmanouil, et al. “The Diverse Lives of Progenitors of Hydrogen-Rich Core-Collapse Supernovae: The Role of Binary Interaction.” Astronomy & Astrophysics, vol. 631, A5, EDP Sciences, 2019, doi:10.1051/0004-6361/201935854.' short: E. Zapartas, S.E. de Mink, S. Justham, N. Smith, A. de Koter, M. Renzo, I. Arcavi, R. Farmer, Y.L.L. Götberg, S. Toonen, Astronomy & Astrophysics 631 (2019). date_created: 2023-08-03T10:13:52Z date_published: 2019-11-20T00:00:00Z date_updated: 2023-08-09T12:36:09Z day: '20' doi: 10.1051/0004-6361/201935854 extern: '1' external_id: arxiv: - '1907.06687' intvolume: ' 631' keyword: - Space and Planetary Science - Astronomy and Astrophysics language: - iso: eng main_file_link: - open_access: '1' url: https://doi.org/10.1051/0004-6361/201935854 month: '11' oa: 1 oa_version: Published Version publication: Astronomy & Astrophysics publication_identifier: eissn: - 1432-0746 issn: - 0004-6361 publication_status: published publisher: EDP Sciences quality_controlled: '1' scopus_import: '1' status: public title: 'The diverse lives of progenitors of hydrogen-rich core-collapse supernovae: The role of binary interaction' type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 631 year: '2019' ... --- _id: '13469' abstract: - lang: eng text: Stars stripped of their envelopes from interaction with a binary companion emit a significant fraction of their radiation as ionizing photons. They are potentially important stellar sources of ionizing radiation, however, they are still often neglected in spectral synthesis simulations or simulations of stellar feedback. In anticipating the large datasets of galaxy spectra from the upcoming James Webb Space Telescope, we modeled the radiative contribution from stripped stars by using detailed evolutionary and spectral models. We estimated their impact on the integrated spectra and specifically on the emission rates of H I-, He I-, and He II-ionizing photons from stellar populations. We find that stripped stars have the largest impact on the ionizing spectrum of a population in which star formation halted several Myr ago. In such stellar populations, stripped stars dominate the emission of ionizing photons, mimicking a younger stellar population in which massive stars are still present. Our models also suggest that stripped stars have harder ionizing spectra than massive stars. The additional ionizing radiation, with which stripped stars contribute affects observable properties that are related to the emission of ionizing photons from stellar populations. In co-eval stellar populations, the ionizing radiation from stripped stars increases the ionization parameter and the production efficiency of hydrogen ionizing photons. They also cause high values for these parameters for about ten times longer than what is predicted for massive stars. The effect on properties related to non-ionizing wavelengths is less pronounced, such as on the ultraviolet continuum slope or stellar contribution to emission lines. However, the hard ionizing radiation from stripped stars likely introduces a characteristic ionization structure of the nebula, which leads to the emission of highly ionized elements such as O2+ and C3+. We, therefore, expect that the presence of stripped stars affects the location in the BPT diagram and the diagnostic ratio of O III to O II nebular emission lines. Our models are publicly available through CDS database and on the STARBURST99 website. article_number: A134 article_processing_charge: No article_type: original arxiv: 1 author: - first_name: Ylva Louise Linsdotter full_name: Götberg, Ylva Louise Linsdotter id: d0648d0c-0f64-11ee-a2e0-dd0faa2e4f7d last_name: Götberg orcid: 0000-0002-6960-6911 - first_name: S. E. full_name: de Mink, S. E. last_name: de Mink - first_name: J. H. full_name: Groh, J. H. last_name: Groh - first_name: C. full_name: Leitherer, C. last_name: Leitherer - first_name: C. full_name: Norman, C. last_name: Norman citation: ama: Götberg YLL, de Mink SE, Groh JH, Leitherer C, Norman C. The impact of stars stripped in binaries on the integrated spectra of stellar populations. Astronomy & Astrophysics. 2019;629. doi:10.1051/0004-6361/201834525 apa: Götberg, Y. L. L., de Mink, S. E., Groh, J. H., Leitherer, C., & Norman, C. (2019). The impact of stars stripped in binaries on the integrated spectra of stellar populations. Astronomy & Astrophysics. EDP Sciences. https://doi.org/10.1051/0004-6361/201834525 chicago: Götberg, Ylva Louise Linsdotter, S. E. de Mink, J. H. Groh, C. Leitherer, and C. Norman. “The Impact of Stars Stripped in Binaries on the Integrated Spectra of Stellar Populations.” Astronomy & Astrophysics. EDP Sciences, 2019. https://doi.org/10.1051/0004-6361/201834525. ieee: Y. L. L. Götberg, S. E. de Mink, J. H. Groh, C. Leitherer, and C. Norman, “The impact of stars stripped in binaries on the integrated spectra of stellar populations,” Astronomy & Astrophysics, vol. 629. EDP Sciences, 2019. ista: Götberg YLL, de Mink SE, Groh JH, Leitherer C, Norman C. 2019. The impact of stars stripped in binaries on the integrated spectra of stellar populations. Astronomy & Astrophysics. 629, A134. mla: Götberg, Ylva Louise Linsdotter, et al. “The Impact of Stars Stripped in Binaries on the Integrated Spectra of Stellar Populations.” Astronomy & Astrophysics, vol. 629, A134, EDP Sciences, 2019, doi:10.1051/0004-6361/201834525. short: Y.L.L. Götberg, S.E. de Mink, J.H. Groh, C. Leitherer, C. Norman, Astronomy & Astrophysics 629 (2019). date_created: 2023-08-03T10:14:00Z date_published: 2019-09-17T00:00:00Z date_updated: 2024-10-14T12:22:42Z day: '17' doi: 10.1051/0004-6361/201834525 extern: '1' external_id: arxiv: - '1908.06102' intvolume: ' 629' keyword: - Space and Planetary Science - Astronomy and Astrophysics language: - iso: eng main_file_link: - open_access: '1' url: https://doi.org/10.1051/0004-6361/201834525 month: '09' oa: 1 oa_version: Published Version publication: Astronomy & Astrophysics publication_identifier: eissn: - 1432-0746 issn: - 0004-6361 publication_status: published publisher: EDP Sciences quality_controlled: '1' scopus_import: '1' status: public title: The impact of stars stripped in binaries on the integrated spectra of stellar populations type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 629 year: '2019' ... --- _id: '13470' abstract: - lang: eng text: "Context. Massive Wolf–Rayet (WR) stars dominate the radiative and mechanical energy budget of galaxies and probe a critical phase in the evolution of massive stars prior to core collapse. It is not known whether core He-burning WR stars (classical WR; cWR) form predominantly through wind stripping (w-WR) or binary stripping (b-WR). Whereas spectroscopy of WR binaries has so-far largely been avoided because of its complexity, our study focuses on the 44 WR binaries and binary candidates of the Large Magellanic Cloud (LMC; metallicity Z ≈ 0.5 Z⊙), which were identified on the basis of radial velocity variations, composite spectra, or high X-ray luminosities.\r\n\r\nAims. Relying on a diverse spectroscopic database, we aim to derive the physical and orbital parameters of our targets, confronting evolution models of evolved massive stars at subsolar metallicity and constraining the impact of binary interaction in forming these stars.\r\n\r\nMethods. Spectroscopy was performed using the Potsdam Wolf–Rayet (PoWR) code and cross-correlation techniques. Disentanglement was performed using the code Spectangular or the shift-and-add algorithm. Evolutionary status was interpreted using the Binary Population and Spectral Synthesis (BPASS) code, exploring binary interaction and chemically homogeneous evolution.\r\n\r\nResults. Among our sample, 28/44 objects show composite spectra and are analyzed as such. An additional five targets show periodically moving WR primaries but no detected companions (SB1); two (BAT99 99 and 112) are potential WR + compact-object candidates owing to their high X-ray luminosities. We cannot confirm the binary nature of the remaining 11 candidates. About two-thirds of the WN components in binaries are identified as cWR, and one-third as hydrogen-burning WR stars. We establish metallicity-dependent mass-loss recipes, which broadly agree with those recently derived for single WN stars, and in which so-called WN3/O3 stars are clear outliers. We estimate that 45  ±  30% of the cWR stars in our sample have interacted with a companion via mass transfer. However, only ≈12  ±  7% of the cWR stars in our sample naively appear to have formed purely owing to stripping via a companion (12% b-WR). Assuming that apparently single WR stars truly formed as single stars, this comprises ≈4% of the whole LMC WN population, which is about ten times less than expected. No obvious differences in the properties of single and binary WN stars, whose luminosities extend down to log L ≈ 5.2 [L⊙], are apparent. With the exception of a few systems (BAT99 19, 49, and 103), the equatorial rotational velocities of the OB-type companions are moderate (veq ≲ 250 km s−1) and challenge standard formalisms of angular-momentum accretion. For most objects, chemically homogeneous evolution can be rejected for the secondary, but not for the WR progenitor.\r\n\r\nConclusions. No obvious dichotomy in the locations of apparently single and binary WN stars on the Hertzsprung-Russell diagram is apparent. According to commonly used stellar evolution models (BPASS, Geneva), most apparently single WN stars could not have formed as single stars, implying that they were stripped by an undetected companion. Otherwise, it must follow that pre-WR mass-loss/mixing (e.g., during the red supergiant phase) are strongly underestimated in standard stellar evolution models." article_number: A151 article_processing_charge: No article_type: original author: - first_name: T. full_name: Shenar, T. last_name: Shenar - first_name: D. P. full_name: Sablowski, D. P. last_name: Sablowski - first_name: R. full_name: Hainich, R. last_name: Hainich - first_name: H. full_name: Todt, H. last_name: Todt - first_name: A. F. J. full_name: Moffat, A. F. J. last_name: Moffat - first_name: L. M. full_name: Oskinova, L. M. last_name: Oskinova - first_name: V. full_name: Ramachandran, V. last_name: Ramachandran - first_name: H. full_name: Sana, H. last_name: Sana - first_name: A. A. C. full_name: Sander, A. A. C. last_name: Sander - first_name: O. full_name: Schnurr, O. last_name: Schnurr - first_name: N. full_name: St-Louis, N. last_name: St-Louis - first_name: D. full_name: Vanbeveren, D. last_name: Vanbeveren - first_name: Ylva Louise Linsdotter full_name: Götberg, Ylva Louise Linsdotter id: d0648d0c-0f64-11ee-a2e0-dd0faa2e4f7d last_name: Götberg orcid: 0000-0002-6960-6911 - first_name: W.-R. full_name: Hamann, W.-R. last_name: Hamann citation: ama: Shenar T, Sablowski DP, Hainich R, et al. The Wolf–Rayet binaries of the nitrogen sequence in the Large Magellanic Cloud. Astronomy & Astrophysics. 2019;627. doi:10.1051/0004-6361/201935684 apa: Shenar, T., Sablowski, D. P., Hainich, R., Todt, H., Moffat, A. F. J., Oskinova, L. M., … Hamann, W.-R. (2019). The Wolf–Rayet binaries of the nitrogen sequence in the Large Magellanic Cloud. Astronomy & Astrophysics. EDP Sciences. https://doi.org/10.1051/0004-6361/201935684 chicago: Shenar, T., D. P. Sablowski, R. Hainich, H. Todt, A. F. J. Moffat, L. M. Oskinova, V. Ramachandran, et al. “The Wolf–Rayet Binaries of the Nitrogen Sequence in the Large Magellanic Cloud.” Astronomy & Astrophysics. EDP Sciences, 2019. https://doi.org/10.1051/0004-6361/201935684. ieee: T. Shenar et al., “The Wolf–Rayet binaries of the nitrogen sequence in the Large Magellanic Cloud,” Astronomy & Astrophysics, vol. 627. EDP Sciences, 2019. ista: Shenar T, Sablowski DP, Hainich R, Todt H, Moffat AFJ, Oskinova LM, Ramachandran V, Sana H, Sander AAC, Schnurr O, St-Louis N, Vanbeveren D, Götberg YLL, Hamann W-R. 2019. The Wolf–Rayet binaries of the nitrogen sequence in the Large Magellanic Cloud. Astronomy & Astrophysics. 627, A151. mla: Shenar, T., et al. “The Wolf–Rayet Binaries of the Nitrogen Sequence in the Large Magellanic Cloud.” Astronomy & Astrophysics, vol. 627, A151, EDP Sciences, 2019, doi:10.1051/0004-6361/201935684. short: T. Shenar, D.P. Sablowski, R. Hainich, H. Todt, A.F.J. Moffat, L.M. Oskinova, V. Ramachandran, H. Sana, A.A.C. Sander, O. Schnurr, N. St-Louis, D. Vanbeveren, Y.L.L. Götberg, W.-R. Hamann, Astronomy & Astrophysics 627 (2019). date_created: 2023-08-03T10:14:09Z date_published: 2019-07-16T00:00:00Z date_updated: 2023-08-09T12:29:58Z day: '16' doi: 10.1051/0004-6361/201935684 extern: '1' intvolume: ' 627' keyword: - Space and Planetary Science - Astronomy and Astrophysics language: - iso: eng main_file_link: - open_access: '1' url: https://doi.org/10.1051/0004-6361/201935684 month: '07' oa: 1 oa_version: Published Version publication: Astronomy & Astrophysics publication_identifier: eissn: - 1432-0746 issn: - 0004-6361 publication_status: published publisher: EDP Sciences quality_controlled: '1' related_material: link: - relation: erratum url: https://doi.org/10.1051/0004-6361/201935684e scopus_import: '1' status: public title: The Wolf–Rayet binaries of the nitrogen sequence in the Large Magellanic Cloud type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 627 year: '2019' ... --- _id: '13471' abstract: - lang: eng text: We perform an extensive numerical study of the evolution of massive binary systems to predict the peculiar velocities that stars obtain when their companion collapses and disrupts the system. Our aim is to (i) identify which predictions are robust against model uncertainties and assess their implications, (ii) investigate which physical processes leave a clear imprint and may therefore be constrained observationally, and (iii) provide a suite of publicly available model predictions to allow for the use of kinematic constraints from the Gaia mission. We find that 22+26−8% of all massive binary systems merge prior to the first core-collapse in the system. Of the remainder, 86+11−9% become unbound because of the core-collapse. Remarkably, this rarely produces runaway stars (observationally defined as stars with velocities above 30 km s−1). These are outnumbered by more than an order of magnitude by slower unbound companions, or “walkaway stars”. This is a robust outcome of our simulations and is due to the reversal of the mass ratio prior to the explosion and widening of the orbit, as we show analytically and numerically. For stars more massive than 15 M⊙, we estimate that 10+5−8% are walkaways and only 0.5+1.0−0.4% are runaways, nearly all of which have accreted mass from their companion. Our findings are consistent with earlier studies; however, the low runaway fraction we find is in tension with observed fractions of about 10%. Thus, astrometric data on presently single massive stars can potentially constrain the physics of massive binary evolution. Finally, we show that the high end of the mass distributions of runaway stars is very sensitive to the assumed black hole natal kicks, and we propose this as a potentially stringent test for the explosion mechanism. We also discuss companions remaining bound that can evolve into X-ray and gravitational wave sources. article_number: A66 article_processing_charge: No article_type: original arxiv: 1 author: - first_name: M. full_name: Renzo, M. last_name: Renzo - first_name: E. full_name: Zapartas, E. last_name: Zapartas - first_name: S. E. full_name: de Mink, S. E. last_name: de Mink - first_name: Ylva Louise Linsdotter full_name: Götberg, Ylva Louise Linsdotter id: d0648d0c-0f64-11ee-a2e0-dd0faa2e4f7d last_name: Götberg orcid: 0000-0002-6960-6911 - first_name: S. full_name: Justham, S. last_name: Justham - first_name: R. J. full_name: Farmer, R. J. last_name: Farmer - first_name: R. G. full_name: Izzard, R. G. last_name: Izzard - first_name: S. full_name: Toonen, S. last_name: Toonen - first_name: H. full_name: Sana, H. last_name: Sana citation: ama: Renzo M, Zapartas E, de Mink SE, et al. Massive runaway and walkaway stars. Astronomy & Astrophysics. 2019;624. doi:10.1051/0004-6361/201833297 apa: Renzo, M., Zapartas, E., de Mink, S. E., Götberg, Y. L. L., Justham, S., Farmer, R. J., … Sana, H. (2019). Massive runaway and walkaway stars. Astronomy & Astrophysics. EDP Sciences. https://doi.org/10.1051/0004-6361/201833297 chicago: Renzo, M., E. Zapartas, S. E. de Mink, Ylva Louise Linsdotter Götberg, S. Justham, R. J. Farmer, R. G. Izzard, S. Toonen, and H. Sana. “Massive Runaway and Walkaway Stars.” Astronomy & Astrophysics. EDP Sciences, 2019. https://doi.org/10.1051/0004-6361/201833297. ieee: M. Renzo et al., “Massive runaway and walkaway stars,” Astronomy & Astrophysics, vol. 624. EDP Sciences, 2019. ista: Renzo M, Zapartas E, de Mink SE, Götberg YLL, Justham S, Farmer RJ, Izzard RG, Toonen S, Sana H. 2019. Massive runaway and walkaway stars. Astronomy & Astrophysics. 624, A66. mla: Renzo, M., et al. “Massive Runaway and Walkaway Stars.” Astronomy & Astrophysics, vol. 624, A66, EDP Sciences, 2019, doi:10.1051/0004-6361/201833297. short: M. Renzo, E. Zapartas, S.E. de Mink, Y.L.L. Götberg, S. Justham, R.J. Farmer, R.G. Izzard, S. Toonen, H. Sana, Astronomy & Astrophysics 624 (2019). date_created: 2023-08-03T10:14:18Z date_published: 2019-04-11T00:00:00Z date_updated: 2023-08-09T12:26:08Z day: '11' doi: 10.1051/0004-6361/201833297 extern: '1' external_id: arxiv: - '1804.09164' intvolume: ' 624' keyword: - Space and Planetary Science - Astronomy and Astrophysics language: - iso: eng main_file_link: - open_access: '1' url: https://doi.org/10.1051/0004-6361/201833297 month: '04' oa: 1 oa_version: Published Version publication: Astronomy & Astrophysics publication_identifier: eissn: - 1432-0746 issn: - 0004-6361 publication_status: published publisher: EDP Sciences quality_controlled: '1' scopus_import: '1' status: public title: Massive runaway and walkaway stars type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 624 year: '2019' ... --- _id: '13472' abstract: - lang: eng text: Massive stars in binaries can give rise to extreme phenomena such as X-ray binaries and gravitational wave sources after one or both stars end their lives as core-collapse supernovae. Stars in close orbit around a stellar or compact companion are expected to explode as “stripped-envelope supernovae”, showing no (Type Ib/c) or little (Type IIb) signs of hydrogen in the spectra, because hydrogen-rich progenitors are too large to fit. The physical processes responsible for the stripping process and the fate of the companion are still very poorly understood. Aiming to find new clues, we investigate Cas A, which is a very young (∼340 yr) and near (∼3.4 kpc) remnant of a core-collapse supernova. Cas A has been subject to several searches for possible companions, all unsuccessfully. We present new measurements of the proper motions and photometry of stars in the vicinity based on deep HST ACS/WFC and WFC3-IR data. We identify stellar sources that are close enough in projection but using their proper motions we show that none are compatible with being at the location of center at the time of explosion, in agreement with earlier findings. Our photometric measurements allow us to place much deeper (order-of-magnitude) upper limits on the brightness of possible undetected companions. We systematically compare them with model predictions for a wide variety of scenarios. We can confidently rule out the presence of any stellar companion of any reasonable mass and age (main sequence, pre main sequence or stripped) ruling out what many considered to be likely evolutionary scenarios for Type IIb supernova (SN IIb). More exotic scenarios that predict the presence of a compact companion (white dwarf, neutron star or black hole) are still possible as well as scenarios where the progenitor of Cas A was single at the moment of explosion (either because it was truly single, or resulted from a binary that was disrupted, or from a binary merger). The presence of a compact companion would imply that Cas A is of interest to study exotic outcomes of binary evolution. The single-at-death solution would still require fine-tuning of the process that removed most of the envelope through a mass-loss mechanism yet to be identified. We discuss how future constraints from Gaia and even deeper photometric studies may help to place further constraints. article_number: A34 article_processing_charge: No article_type: original arxiv: 1 author: - first_name: Wolfgang E. full_name: Kerzendorf, Wolfgang E. last_name: Kerzendorf - first_name: Tuan full_name: Do, Tuan last_name: Do - first_name: Selma E. full_name: de Mink, Selma E. last_name: de Mink - first_name: Ylva Louise Linsdotter full_name: Götberg, Ylva Louise Linsdotter id: d0648d0c-0f64-11ee-a2e0-dd0faa2e4f7d last_name: Götberg orcid: 0000-0002-6960-6911 - first_name: Dan full_name: Milisavljevic, Dan last_name: Milisavljevic - first_name: Emmanouil full_name: Zapartas, Emmanouil last_name: Zapartas - first_name: Mathieu full_name: Renzo, Mathieu last_name: Renzo - first_name: Stephen full_name: Justham, Stephen last_name: Justham - first_name: Philipp full_name: Podsiadlowski, Philipp last_name: Podsiadlowski - first_name: Robert A. full_name: Fesen, Robert A. last_name: Fesen citation: ama: Kerzendorf WE, Do T, de Mink SE, et al. No surviving non-compact stellar companion to Cassiopeia A. Astronomy & Astrophysics. 2019;623. doi:10.1051/0004-6361/201732206 apa: Kerzendorf, W. E., Do, T., de Mink, S. E., Götberg, Y. L. L., Milisavljevic, D., Zapartas, E., … Fesen, R. A. (2019). No surviving non-compact stellar companion to Cassiopeia A. Astronomy & Astrophysics. EDP Sciences. https://doi.org/10.1051/0004-6361/201732206 chicago: Kerzendorf, Wolfgang E., Tuan Do, Selma E. de Mink, Ylva Louise Linsdotter Götberg, Dan Milisavljevic, Emmanouil Zapartas, Mathieu Renzo, Stephen Justham, Philipp Podsiadlowski, and Robert A. Fesen. “No Surviving Non-Compact Stellar Companion to Cassiopeia A.” Astronomy & Astrophysics. EDP Sciences, 2019. https://doi.org/10.1051/0004-6361/201732206. ieee: W. E. Kerzendorf et al., “No surviving non-compact stellar companion to Cassiopeia A,” Astronomy & Astrophysics, vol. 623. EDP Sciences, 2019. ista: Kerzendorf WE, Do T, de Mink SE, Götberg YLL, Milisavljevic D, Zapartas E, Renzo M, Justham S, Podsiadlowski P, Fesen RA. 2019. No surviving non-compact stellar companion to Cassiopeia A. Astronomy & Astrophysics. 623, A34. mla: Kerzendorf, Wolfgang E., et al. “No Surviving Non-Compact Stellar Companion to Cassiopeia A.” Astronomy & Astrophysics, vol. 623, A34, EDP Sciences, 2019, doi:10.1051/0004-6361/201732206. short: W.E. Kerzendorf, T. Do, S.E. de Mink, Y.L.L. Götberg, D. Milisavljevic, E. Zapartas, M. Renzo, S. Justham, P. Podsiadlowski, R.A. Fesen, Astronomy & Astrophysics 623 (2019). date_created: 2023-08-03T10:14:27Z date_published: 2019-03-27T00:00:00Z date_updated: 2023-08-09T12:28:17Z day: '27' doi: 10.1051/0004-6361/201732206 extern: '1' external_id: arxiv: - '1711.00055' intvolume: ' 623' keyword: - Space and Planetary Science - Astronomy and Astrophysics language: - iso: eng main_file_link: - open_access: '1' url: https://doi.org/10.1051/0004-6361/201732206 month: '03' oa: 1 oa_version: Published Version publication: Astronomy & Astrophysics publication_identifier: eissn: - 1432-0746 issn: - 0004-6361 publication_status: published publisher: EDP Sciences quality_controlled: '1' scopus_import: '1' status: public title: No surviving non-compact stellar companion to Cassiopeia A type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 623 year: '2019' ... --- _id: '138' abstract: - lang: eng text: Autoregulation is the direct modulation of gene expression by the product of the corresponding gene. Autoregulation of bacterial gene expression has been mostly studied at the transcriptional level, when a protein acts as the cognate transcriptional repressor. A recent study investigating dynamics of the bacterial toxin–antitoxin MazEF system has shown how autoregulation at both the transcriptional and post-transcriptional levels affects the heterogeneity of Escherichia coli populations. Toxin–antitoxin systems hold a crucial but still elusive part in bacterial response to stress. This perspective highlights how these modules can also serve as a great model system for investigating basic concepts in gene regulation. However, as the genomic background and environmental conditions substantially influence toxin activation, it is important to study (auto)regulation of toxin–antitoxin systems in well-defined setups as well as in conditions that resemble the environmental niche. article_processing_charge: Yes (via OA deal) author: - first_name: Nela full_name: Nikolic, Nela id: 42D9CABC-F248-11E8-B48F-1D18A9856A87 last_name: Nikolic orcid: 0000-0001-9068-6090 citation: ama: 'Nikolic N. Autoregulation of bacterial gene expression: lessons from the MazEF toxin–antitoxin system. Current Genetics. 2019;65(1):133-138. doi:10.1007/s00294-018-0879-8' apa: 'Nikolic, N. (2019). Autoregulation of bacterial gene expression: lessons from the MazEF toxin–antitoxin system. Current Genetics. Springer. https://doi.org/10.1007/s00294-018-0879-8' chicago: 'Nikolic, Nela. “Autoregulation of Bacterial Gene Expression: Lessons from the MazEF Toxin–Antitoxin System.” Current Genetics. Springer, 2019. https://doi.org/10.1007/s00294-018-0879-8.' ieee: 'N. Nikolic, “Autoregulation of bacterial gene expression: lessons from the MazEF toxin–antitoxin system,” Current Genetics, vol. 65, no. 1. Springer, pp. 133–138, 2019.' ista: 'Nikolic N. 2019. Autoregulation of bacterial gene expression: lessons from the MazEF toxin–antitoxin system. Current Genetics. 65(1), 133–138.' mla: 'Nikolic, Nela. “Autoregulation of Bacterial Gene Expression: Lessons from the MazEF Toxin–Antitoxin System.” Current Genetics, vol. 65, no. 1, Springer, 2019, pp. 133–38, doi:10.1007/s00294-018-0879-8.' short: N. Nikolic, Current Genetics 65 (2019) 133–138. date_created: 2018-12-11T11:44:50Z date_published: 2019-02-01T00:00:00Z date_updated: 2025-04-15T06:50:19Z day: '01' ddc: - '570' department: - _id: CaGu doi: 10.1007/s00294-018-0879-8 ec_funded: 1 external_id: isi: - '000456958800017' file: - access_level: open_access checksum: 6779708b0b632a1a6ed28c56f5161142 content_type: application/pdf creator: dernst date_created: 2019-02-06T07:50:58Z date_updated: 2020-07-14T12:44:47Z file_id: '5930' file_name: 2019_CurrentGenetics_Nikolic.pdf file_size: 776399 relation: main_file file_date_updated: 2020-07-14T12:44:47Z has_accepted_license: '1' intvolume: ' 65' isi: 1 issue: '1' language: - iso: eng month: '02' oa: 1 oa_version: Published Version page: 133-138 project: - _id: 25681D80-B435-11E9-9278-68D0E5697425 call_identifier: FP7 grant_number: '291734' name: International IST Postdoc Fellowship Programme publication: Current Genetics publication_status: published publisher: Springer publist_id: '7785' quality_controlled: '1' scopus_import: '1' status: public title: 'Autoregulation of bacterial gene expression: lessons from the MazEF toxin–antitoxin system' 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: c635000d-4b10-11ee-a964-aac5a93f6ac1 volume: 65 year: '2019' ... --- _id: '14001' abstract: - lang: eng text: Chiral molecules interact and react differently with other chiral objects, depending on their handedness. Therefore, it is essential to understand and ultimately control the evolution of molecular chirality during chemical reactions. Although highly sophisticated techniques for the controlled synthesis of chiral molecules have been developed, the observation of chirality on the natural femtosecond time scale of a chemical reaction has so far remained out of reach in the gas phase. Here, we demonstrate a general experimental technique, based on high-harmonic generation in tailored laser fields, and apply it to probe the time evolution of molecular chirality during the photodissociation of 2-iodobutane. These measurements show a change in sign and a pronounced increase in the magnitude of the chiral response over the first 100 fs, followed by its decay within less than 500 fs, revealing the photodissociation to achiral products. The observed time evolution is explained in terms of the variation of the electric and magnetic transition-dipole moments between the lowest electronic states of the cation as a function of the reaction coordinate. These results open the path to investigations of the chirality of molecular-reaction pathways, light-induced chirality in chemical processes, and the control of molecular chirality through tailored laser pulses. article_processing_charge: No article_type: original arxiv: 1 author: - first_name: Denitsa Rangelova full_name: Baykusheva, Denitsa Rangelova id: 71b4d059-2a03-11ee-914d-dfa3beed6530 last_name: Baykusheva - first_name: Daniel full_name: Zindel, Daniel last_name: Zindel - first_name: Vít full_name: Svoboda, Vít last_name: Svoboda - first_name: Elias full_name: Bommeli, Elias last_name: Bommeli - first_name: Manuel full_name: Ochsner, Manuel last_name: Ochsner - first_name: Andres full_name: Tehlar, Andres last_name: Tehlar - first_name: Hans Jakob full_name: Wörner, Hans Jakob last_name: Wörner citation: ama: Baykusheva DR, Zindel D, Svoboda V, et al. Real-time probing of chirality during a chemical reaction. Proceedings of the National Academy of Sciences. 2019;116(48):23923-23929. doi:10.1073/pnas.1907189116 apa: Baykusheva, D. R., Zindel, D., Svoboda, V., Bommeli, E., Ochsner, M., Tehlar, A., & Wörner, H. J. (2019). Real-time probing of chirality during a chemical reaction. Proceedings of the National Academy of Sciences. Proceedings of the National Academy of Sciences. https://doi.org/10.1073/pnas.1907189116 chicago: Baykusheva, Denitsa Rangelova, Daniel Zindel, Vít Svoboda, Elias Bommeli, Manuel Ochsner, Andres Tehlar, and Hans Jakob Wörner. “Real-Time Probing of Chirality during a Chemical Reaction.” Proceedings of the National Academy of Sciences. Proceedings of the National Academy of Sciences, 2019. https://doi.org/10.1073/pnas.1907189116. ieee: D. R. Baykusheva et al., “Real-time probing of chirality during a chemical reaction,” Proceedings of the National Academy of Sciences, vol. 116, no. 48. Proceedings of the National Academy of Sciences, pp. 23923–23929, 2019. ista: Baykusheva DR, Zindel D, Svoboda V, Bommeli E, Ochsner M, Tehlar A, Wörner HJ. 2019. Real-time probing of chirality during a chemical reaction. Proceedings of the National Academy of Sciences. 116(48), 23923–23929. mla: Baykusheva, Denitsa Rangelova, et al. “Real-Time Probing of Chirality during a Chemical Reaction.” Proceedings of the National Academy of Sciences, vol. 116, no. 48, Proceedings of the National Academy of Sciences, 2019, pp. 23923–29, doi:10.1073/pnas.1907189116. short: D.R. Baykusheva, D. Zindel, V. Svoboda, E. Bommeli, M. Ochsner, A. Tehlar, H.J. Wörner, Proceedings of the National Academy of Sciences 116 (2019) 23923–23929. date_created: 2023-08-09T13:10:36Z date_published: 2019-11-13T00:00:00Z date_updated: 2023-08-22T07:40:05Z day: '13' doi: 10.1073/pnas.1907189116 extern: '1' external_id: arxiv: - '1906.10818' pmid: - '31723044' intvolume: ' 116' issue: '48' keyword: - Multidisciplinary language: - iso: eng main_file_link: - open_access: '1' url: https://doi.org/10.1073/pnas.1907189116 month: '11' oa: 1 oa_version: Published Version page: 23923-23929 pmid: 1 publication: Proceedings of the National Academy of Sciences publication_identifier: eissn: - 1091-6490 issn: - 0027-8424 publication_status: published publisher: Proceedings of the National Academy of Sciences quality_controlled: '1' scopus_import: '1' status: public title: Real-time probing of chirality during a chemical reaction type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 116 year: '2019' ... --- _id: '14002' abstract: - lang: eng text: The advancement of attosecond chronoscopy has made it possible to reveal ultrashort time dynamics of photoionization [1]. Ionization delay measurements in atomic targets provide a wealth of information about the timing of the photoelectric effect [2], resonances, electron correlations and transport. The extension of this approach to molecules, however, presents great challenges. In addition to the difficulty of identifying correct ionization channels, it is hard to disentangle the role of the anisotropic molecular landscape from the delays inherent to the excitation process itself. Here, we present the measurements of ionization delays from ethyl iodide around the 4d giant dipole resonance of iodine. We employ attosecond streaking spectroscopy, which enables to disentangle the contribution to the delay from the functional ethyl group, being responsible for the characteristic chemical reactivity of the molecule. An attosecond extreme ultraviolet (XUV) pulse ionizes the molecule around the energy of the giant resonance and the released electron is exposed to the ponderomotive force of a synchronized near-infrared (NIR) field, which yields a streaking spectrogram (see figure). Comparative phase analysis of the spectrograms corresponding to iodine 4d and neon 2p emission permits extracting overall photoemission delays for ethyl iodide. The data is recorded for multiple photon energies around the iodine 4d resonance and compared to classical Wigner propagation [3] and quantum scattering [4] calculations. Here the outgoing electron, produced via inner shell ionization of the iodine atom in ethyl iodide, and thereby hardly influenced by the molecular potential during the birth process, acquires the necessary information about the influence of the functional ethyl group during its propagation. We find significant delay contributions that can distinguish between different functional groups, providing a sensitive probe of the local molecular environment [5]. This would stimulate to perform further angle resolved measurements in molecules to probe the potential landscape in three dimension. article_number: '8871819' article_processing_charge: No author: - first_name: Shubhadeep full_name: Biswas, Shubhadeep last_name: Biswas - first_name: I. full_name: Liontos, I. last_name: Liontos - first_name: A. M. full_name: Kamal, A. M. last_name: Kamal - first_name: N. G. full_name: Kling, N. G. last_name: Kling - first_name: A. F. full_name: Alharbi, A. F. last_name: Alharbi - first_name: M. full_name: Alharbi, M. last_name: Alharbi - first_name: A. M. full_name: Azzeer, A. M. last_name: Azzeer - first_name: H. J. full_name: Worner, H. J. last_name: Worner - first_name: A. S. full_name: Landsman, A. S. last_name: Landsman - first_name: M. F. full_name: Kling, M. F. last_name: Kling - first_name: B. full_name: Forg, B. last_name: Forg - first_name: J. full_name: Schotz, J. last_name: Schotz - first_name: W. full_name: Schweinberger, W. last_name: Schweinberger - first_name: L. full_name: Ortmann, L. last_name: Ortmann - first_name: T. full_name: Zimmermann, T. last_name: Zimmermann - first_name: L.-W. full_name: Pi, L.-W. last_name: Pi - first_name: Denitsa Rangelova full_name: Baykusheva, Denitsa Rangelova id: 71b4d059-2a03-11ee-914d-dfa3beed6530 last_name: Baykusheva - first_name: H. A. full_name: Masood, H. A. last_name: Masood citation: ama: 'Biswas S, Liontos I, Kamal AM, et al. Probing molecular influence on photoemission delays. In: 2019 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference. Institute of Electrical and Electronics Engineers; 2019. doi:10.1109/cleoe-eqec.2019.8871819' apa: 'Biswas, S., Liontos, I., Kamal, A. M., Kling, N. G., Alharbi, A. F., Alharbi, M., … Masood, H. A. (2019). Probing molecular influence on photoemission delays. In 2019 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference. Munich, Germany: Institute of Electrical and Electronics Engineers. https://doi.org/10.1109/cleoe-eqec.2019.8871819' chicago: Biswas, Shubhadeep, I. Liontos, A. M. Kamal, N. G. Kling, A. F. Alharbi, M. Alharbi, A. M. Azzeer, et al. “Probing Molecular Influence on Photoemission Delays.” In 2019 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference. Institute of Electrical and Electronics Engineers, 2019. https://doi.org/10.1109/cleoe-eqec.2019.8871819. ieee: S. Biswas et al., “Probing molecular influence on photoemission delays,” in 2019 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference, Munich, Germany, 2019. ista: 'Biswas S, Liontos I, Kamal AM, Kling NG, Alharbi AF, Alharbi M, Azzeer AM, Worner HJ, Landsman AS, Kling MF, Forg B, Schotz J, Schweinberger W, Ortmann L, Zimmermann T, Pi L-W, Baykusheva DR, Masood HA. 2019. Probing molecular influence on photoemission delays. 2019 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference. CLEO: European Conference on Lasers and Electro-Optics, 8871819.' mla: Biswas, Shubhadeep, et al. “Probing Molecular Influence on Photoemission Delays.” 2019 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference, 8871819, Institute of Electrical and Electronics Engineers, 2019, doi:10.1109/cleoe-eqec.2019.8871819. short: S. Biswas, I. Liontos, A.M. Kamal, N.G. Kling, A.F. Alharbi, M. Alharbi, A.M. Azzeer, H.J. Worner, A.S. Landsman, M.F. Kling, B. Forg, J. Schotz, W. Schweinberger, L. Ortmann, T. Zimmermann, L.-W. Pi, D.R. Baykusheva, H.A. Masood, in:, 2019 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference, Institute of Electrical and Electronics Engineers, 2019. conference: end_date: 2019-06-27 location: Munich, Germany name: 'CLEO: European Conference on Lasers and Electro-Optics' start_date: 2019-06-23 date_created: 2023-08-09T13:10:49Z date_published: 2019-10-17T00:00:00Z date_updated: 2023-08-22T09:32:56Z day: '17' doi: 10.1109/cleoe-eqec.2019.8871819 extern: '1' language: - iso: eng month: '10' oa_version: None publication: 2019 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference publication_identifier: eisbn: - '9781728104690' isbn: - '9781728104706' publication_status: published publisher: Institute of Electrical and Electronics Engineers quality_controlled: '1' scopus_import: '1' status: public title: Probing molecular influence on photoemission delays type: conference user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 year: '2019' ... --- _id: '14184' abstract: - lang: eng text: "Learning disentangled representations is considered a cornerstone problem in\r\nrepresentation learning. Recently, Locatello et al. (2019) demonstrated that\r\nunsupervised disentanglement learning without inductive biases is theoretically\r\nimpossible and that existing inductive biases and unsupervised methods do not\r\nallow to consistently learn disentangled representations. However, in many\r\npractical settings, one might have access to a limited amount of supervision,\r\nfor example through manual labeling of (some) factors of variation in a few\r\ntraining examples. In this paper, we investigate the impact of such supervision\r\non state-of-the-art disentanglement methods and perform a large scale study,\r\ntraining over 52000 models under well-defined and reproducible experimental\r\nconditions. We observe that a small number of labeled examples (0.01--0.5\\% of\r\nthe data set), with potentially imprecise and incomplete labels, is sufficient\r\nto perform model selection on state-of-the-art unsupervised models. Further, we\r\ninvestigate the benefit of incorporating supervision into the training process.\r\nOverall, we empirically validate that with little and imprecise supervision it\r\nis possible to reliably learn disentangled representations." article_processing_charge: No arxiv: 1 author: - first_name: Francesco full_name: Locatello, Francesco id: 26cfd52f-2483-11ee-8040-88983bcc06d4 last_name: Locatello orcid: 0000-0002-4850-0683 - first_name: Michael full_name: Tschannen, Michael last_name: Tschannen - first_name: Stefan full_name: Bauer, Stefan last_name: Bauer - first_name: Gunnar full_name: Rätsch, Gunnar last_name: Rätsch - first_name: Bernhard full_name: Schölkopf, Bernhard last_name: Schölkopf - first_name: Olivier full_name: Bachem, Olivier last_name: Bachem citation: ama: 'Locatello F, Tschannen M, Bauer S, Rätsch G, Schölkopf B, Bachem O. Disentangling factors of variation using few labels. In: 8th International Conference on Learning Representations. ; 2019.' apa: Locatello, F., Tschannen, M., Bauer, S., Rätsch, G., Schölkopf, B., & Bachem, O. (2019). Disentangling factors of variation using few labels. In 8th International Conference on Learning Representations. Virtual. chicago: Locatello, Francesco, Michael Tschannen, Stefan Bauer, Gunnar Rätsch, Bernhard Schölkopf, and Olivier Bachem. “Disentangling Factors of Variation Using Few Labels.” In 8th International Conference on Learning Representations, 2019. ieee: F. Locatello, M. Tschannen, S. Bauer, G. Rätsch, B. Schölkopf, and O. Bachem, “Disentangling factors of variation using few labels,” in 8th International Conference on Learning Representations, Virtual, 2019. ista: 'Locatello F, Tschannen M, Bauer S, Rätsch G, Schölkopf B, Bachem O. 2019. Disentangling factors of variation using few labels. 8th International Conference on Learning Representations. ICLR: International Conference on Learning Representations.' mla: Locatello, Francesco, et al. “Disentangling Factors of Variation Using Few Labels.” 8th International Conference on Learning Representations, 2019. short: F. Locatello, M. Tschannen, S. Bauer, G. Rätsch, B. Schölkopf, O. Bachem, in:, 8th International Conference on Learning Representations, 2019. conference: end_date: 2020-05-01 location: Virtual name: 'ICLR: International Conference on Learning Representations' start_date: 2020-04-26 date_created: 2023-08-22T14:06:37Z date_published: 2019-12-20T00:00:00Z date_updated: 2023-09-12T07:01:34Z day: '20' department: - _id: FrLo extern: '1' external_id: arxiv: - '1905.01258' language: - iso: eng main_file_link: - open_access: '1' url: https://arxiv.org/abs/1905.01258 month: '12' oa: 1 oa_version: Preprint publication: 8th International Conference on Learning Representations publication_status: published quality_controlled: '1' scopus_import: '1' status: public title: Disentangling factors of variation using few labels type: conference user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 year: '2019' ... --- _id: '14189' abstract: - lang: eng text: "We consider the problem of recovering a common latent source with independent\r\ncomponents from multiple views. This applies to settings in which a variable is\r\nmeasured with multiple experimental modalities, and where the goal is to\r\nsynthesize the disparate measurements into a single unified representation. We\r\nconsider the case that the observed views are a nonlinear mixing of\r\ncomponent-wise corruptions of the sources. When the views are considered\r\nseparately, this reduces to nonlinear Independent Component Analysis (ICA) for\r\nwhich it is provably impossible to undo the mixing. We present novel\r\nidentifiability proofs that this is possible when the multiple views are\r\nconsidered jointly, showing that the mixing can theoretically be undone using\r\nfunction approximators such as deep neural networks. In contrast to known\r\nidentifiability results for nonlinear ICA, we prove that independent latent\r\nsources with arbitrary mixing can be recovered as long as multiple,\r\nsufficiently different noisy views are available." alternative_title: - PMLR article_processing_charge: No arxiv: 1 author: - first_name: Luigi full_name: Gresele, Luigi last_name: Gresele - first_name: Paul K. full_name: Rubenstein, Paul K. last_name: Rubenstein - first_name: Arash full_name: Mehrjou, Arash last_name: Mehrjou - first_name: Francesco full_name: Locatello, Francesco id: 26cfd52f-2483-11ee-8040-88983bcc06d4 last_name: Locatello orcid: 0000-0002-4850-0683 - first_name: Bernhard full_name: Schölkopf, Bernhard last_name: Schölkopf citation: ama: 'Gresele L, Rubenstein PK, Mehrjou A, Locatello F, Schölkopf B. The incomplete Rosetta Stone problem: Identifiability results for multi-view nonlinear ICA. In: Proceedings of the 35th Conference on Uncertainty in Artificial  Intelligence. Vol 115. ML Research Press; 2019:217-227.' apa: 'Gresele, L., Rubenstein, P. K., Mehrjou, A., Locatello, F., & Schölkopf, B. (2019). The incomplete Rosetta Stone problem: Identifiability results for multi-view nonlinear ICA. In Proceedings of the 35th Conference on Uncertainty in Artificial  Intelligence (Vol. 115, pp. 217–227). Tel Aviv, Israel: ML Research Press.' chicago: 'Gresele, Luigi, Paul K. Rubenstein, Arash Mehrjou, Francesco Locatello, and Bernhard Schölkopf. “The Incomplete Rosetta Stone Problem: Identifiability Results for Multi-View Nonlinear ICA.” In Proceedings of the 35th Conference on Uncertainty in Artificial  Intelligence, 115:217–27. ML Research Press, 2019.' ieee: 'L. Gresele, P. K. Rubenstein, A. Mehrjou, F. Locatello, and B. Schölkopf, “The incomplete Rosetta Stone problem: Identifiability results for multi-view nonlinear ICA,” in Proceedings of the 35th Conference on Uncertainty in Artificial  Intelligence, Tel Aviv, Israel, 2019, vol. 115, pp. 217–227.' ista: 'Gresele L, Rubenstein PK, Mehrjou A, Locatello F, Schölkopf B. 2019. The incomplete Rosetta Stone problem: Identifiability results for multi-view nonlinear ICA. Proceedings of the 35th Conference on Uncertainty in Artificial  Intelligence. UAI: Uncertainty in Artificial Intelligence, PMLR, vol. 115, 217–227.' mla: 'Gresele, Luigi, et al. “The Incomplete Rosetta Stone Problem: Identifiability Results for Multi-View Nonlinear ICA.” Proceedings of the 35th Conference on Uncertainty in Artificial  Intelligence, vol. 115, ML Research Press, 2019, pp. 217–27.' short: L. Gresele, P.K. Rubenstein, A. Mehrjou, F. Locatello, B. Schölkopf, in:, Proceedings of the 35th Conference on Uncertainty in Artificial  Intelligence, ML Research Press, 2019, pp. 217–227. conference: end_date: 2019-07-25 location: Tel Aviv, Israel name: 'UAI: Uncertainty in Artificial Intelligence' start_date: 2019-07-22 date_created: 2023-08-22T14:08:35Z date_published: 2019-05-16T00:00:00Z date_updated: 2023-09-12T08:07:38Z day: '16' department: - _id: FrLo extern: '1' external_id: arxiv: - '1905.06642' intvolume: ' 115' language: - iso: eng main_file_link: - open_access: '1' url: https://arxiv.org/abs/1905.06642 month: '05' oa: 1 oa_version: Preprint page: 217-227 publication: Proceedings of the 35th Conference on Uncertainty in Artificial Intelligence publication_status: published publisher: ML Research Press quality_controlled: '1' scopus_import: '1' status: public title: 'The incomplete Rosetta Stone problem: Identifiability results for multi-view nonlinear ICA' type: conference user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 115 year: '2019' ... --- _id: '14190' abstract: - lang: eng text: "Learning meaningful and compact representations with disentangled semantic\r\naspects is considered to be of key importance in representation learning. Since\r\nreal-world data is notoriously costly to collect, many recent state-of-the-art\r\ndisentanglement models have heavily relied on synthetic toy data-sets. In this\r\npaper, we propose a novel data-set which consists of over one million images of\r\nphysical 3D objects with seven factors of variation, such as object color,\r\nshape, size and position. In order to be able to control all the factors of\r\nvariation precisely, we built an experimental platform where the objects are\r\nbeing moved by a robotic arm. In addition, we provide two more datasets which\r\nconsist of simulations of the experimental setup. These datasets provide for\r\nthe first time the possibility to systematically investigate how well different\r\ndisentanglement methods perform on real data in comparison to simulation, and\r\nhow simulated data can be leveraged to build better representations of the real\r\nworld. We provide a first experimental study of these questions and our results\r\nindicate that learned models transfer poorly, but that model and hyperparameter\r\nselection is an effective means of transferring information to the real world." article_processing_charge: No arxiv: 1 author: - first_name: Muhammad Waleed full_name: Gondal, Muhammad Waleed last_name: Gondal - first_name: Manuel full_name: Wüthrich, Manuel last_name: Wüthrich - first_name: Đorđe full_name: Miladinović, Đorđe last_name: Miladinović - first_name: Francesco full_name: Locatello, Francesco id: 26cfd52f-2483-11ee-8040-88983bcc06d4 last_name: Locatello orcid: 0000-0002-4850-0683 - first_name: Martin full_name: Breidt, Martin last_name: Breidt - first_name: Valentin full_name: Volchkov, Valentin last_name: Volchkov - first_name: Joel full_name: Akpo, Joel last_name: Akpo - first_name: Olivier full_name: Bachem, Olivier last_name: Bachem - first_name: Bernhard full_name: Schölkopf, Bernhard last_name: Schölkopf - first_name: Stefan full_name: Bauer, Stefan last_name: Bauer citation: ama: 'Gondal MW, Wüthrich M, Miladinović Đ, et al. On the transfer of inductive bias from simulation to the real world: a new disentanglement dataset. In: Advances in Neural Information Processing Systems. Vol 32. ; 2019.' apa: 'Gondal, M. W., Wüthrich, M., Miladinović, Đ., Locatello, F., Breidt, M., Volchkov, V., … Bauer, S. (2019). On the transfer of inductive bias from simulation to the real world: a new disentanglement dataset. In Advances in Neural Information Processing Systems (Vol. 32). Vancouver, Canada.' chicago: 'Gondal, Muhammad Waleed, Manuel Wüthrich, Đorđe Miladinović, Francesco Locatello, Martin Breidt, Valentin Volchkov, Joel Akpo, Olivier Bachem, Bernhard Schölkopf, and Stefan Bauer. “On the Transfer of Inductive Bias from Simulation to the Real World: A New Disentanglement Dataset.” In Advances in Neural Information Processing Systems, Vol. 32, 2019.' ieee: 'M. W. Gondal et al., “On the transfer of inductive bias from simulation to the real world: a new disentanglement dataset,” in Advances in Neural Information Processing Systems, Vancouver, Canada, 2019, vol. 32.' ista: 'Gondal MW, Wüthrich M, Miladinović Đ, Locatello F, Breidt M, Volchkov V, Akpo J, Bachem O, Schölkopf B, Bauer S. 2019. On the transfer of inductive bias from simulation to the real world: a new disentanglement dataset. Advances in Neural Information Processing Systems. NeurIPS: Neural Information Processing Systems vol. 32.' mla: 'Gondal, Muhammad Waleed, et al. “On the Transfer of Inductive Bias from Simulation to the Real World: A New Disentanglement Dataset.” Advances in Neural Information Processing Systems, vol. 32, 2019.' short: M.W. Gondal, M. Wüthrich, Đ. Miladinović, F. Locatello, M. Breidt, V. Volchkov, J. Akpo, O. Bachem, B. Schölkopf, S. Bauer, in:, Advances in Neural Information Processing Systems, 2019. conference: end_date: 2019-12-14 location: Vancouver, Canada name: 'NeurIPS: Neural Information Processing Systems' start_date: 2019-12-08 date_created: 2023-08-22T14:09:13Z date_published: 2019-06-07T00:00:00Z date_updated: 2023-09-13T09:46:38Z day: '07' department: - _id: FrLo extern: '1' external_id: arxiv: - '1906.03292' intvolume: ' 32' language: - iso: eng main_file_link: - open_access: '1' url: https://arxiv.org/abs/1906.03292 month: '06' oa: 1 oa_version: Preprint publication: Advances in Neural Information Processing Systems publication_identifier: isbn: - '9781713807933' publication_status: published quality_controlled: '1' status: public title: 'On the transfer of inductive bias from simulation to the real world: a new disentanglement dataset' type: conference user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1 volume: 32 year: '2019' ... --- _id: '14191' abstract: - lang: eng text: A broad class of convex optimization problems can be formulated as a semidefinite program (SDP), minimization of a convex function over the positive-semidefinite cone subject to some affine constraints. The majority of classical SDP solvers are designed for the deterministic setting where problem data is readily available. In this setting, generalized conditional gradient methods (aka Frank-Wolfe-type methods) provide scalable solutions by leveraging the so-called linear minimization oracle instead of the projection onto the semidefinite cone. Most problems in machine learning and modern engineering applications, however, contain some degree of stochasticity. In this work, we propose the first conditional-gradient-type method for solving stochastic optimization problems under affine constraints. Our method guarantees O(k−1/3) convergence rate in expectation on the objective residual and O(k−5/12) on the feasibility gap. article_processing_charge: No arxiv: 1 author: - first_name: Francesco full_name: Locatello, Francesco id: 26cfd52f-2483-11ee-8040-88983bcc06d4 last_name: Locatello orcid: 0000-0002-4850-0683 - first_name: Alp full_name: Yurtsever, Alp last_name: Yurtsever - first_name: Olivier full_name: Fercoq, Olivier last_name: Fercoq - first_name: Volkan full_name: Cevher, Volkan last_name: Cevher citation: ama: 'Locatello F, Yurtsever A, Fercoq O, Cevher V. Stochastic Frank-Wolfe for composite convex minimization. In: Advances in Neural Information Processing Systems. Vol 32. ; 2019:14291–14301.' apa: Locatello, F., Yurtsever, A., Fercoq, O., & Cevher, V. (2019). Stochastic Frank-Wolfe for composite convex minimization. In Advances in Neural Information Processing Systems (Vol. 32, pp. 14291–14301). Vancouver, Canada. chicago: Locatello, Francesco, Alp Yurtsever, Olivier Fercoq, and Volkan Cevher. “Stochastic Frank-Wolfe for Composite Convex Minimization.” In Advances in Neural Information Processing Systems, 32:14291–14301, 2019. ieee: F. Locatello, A. Yurtsever, O. Fercoq, and V. Cevher, “Stochastic Frank-Wolfe for composite convex minimization,” in Advances in Neural Information Processing Systems, Vancouver, Canada, 2019, vol. 32, pp. 14291–14301. ista: 'Locatello F, Yurtsever A, Fercoq O, Cevher V. 2019. Stochastic Frank-Wolfe for composite convex minimization. Advances in Neural Information Processing Systems. NeurIPS: Neural Information Processing Systems vol. 32, 14291–14301.' mla: Locatello, Francesco, et al. “Stochastic Frank-Wolfe for Composite Convex Minimization.” Advances in Neural Information Processing Systems, vol. 32, 2019, pp. 14291–14301. short: F. Locatello, A. Yurtsever, O. Fercoq, V. Cevher, in:, Advances in Neural Information Processing Systems, 2019, pp. 14291–14301. conference: end_date: 2019-12-14 location: Vancouver, Canada name: 'NeurIPS: Neural Information Processing Systems' start_date: 2019-12-08 date_created: 2023-08-22T14:09:35Z date_published: 2019-12-29T00:00:00Z date_updated: 2023-09-12T08:48:45Z day: '29' department: - _id: FrLo extern: '1' external_id: arxiv: - '1901.10348' intvolume: ' 32' language: - iso: eng main_file_link: - open_access: '1' url: https://arxiv.org/abs/1901.10348 month: '12' oa: 1 oa_version: Preprint page: 14291–14301 publication: Advances in Neural Information Processing Systems publication_identifier: isbn: - '9781713807933' publication_status: published quality_controlled: '1' scopus_import: '1' status: public title: Stochastic Frank-Wolfe for composite convex minimization type: conference user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 32 year: '2019' ... --- _id: '14193' abstract: - lang: eng text: "A disentangled representation encodes information about the salient factors\r\nof variation in the data independently. Although it is often argued that this\r\nrepresentational format is useful in learning to solve many real-world\r\ndown-stream tasks, there is little empirical evidence that supports this claim.\r\nIn this paper, we conduct a large-scale study that investigates whether\r\ndisentangled representations are more suitable for abstract reasoning tasks.\r\nUsing two new tasks similar to Raven's Progressive Matrices, we evaluate the\r\nusefulness of the representations learned by 360 state-of-the-art unsupervised\r\ndisentanglement models. Based on these representations, we train 3600 abstract\r\nreasoning models and observe that disentangled representations do in fact lead\r\nto better down-stream performance. In particular, they enable quicker learning\r\nusing fewer samples." article_processing_charge: No arxiv: 1 author: - first_name: Sjoerd van full_name: Steenkiste, Sjoerd van last_name: Steenkiste - first_name: Francesco full_name: Locatello, Francesco id: 26cfd52f-2483-11ee-8040-88983bcc06d4 last_name: Locatello orcid: 0000-0002-4850-0683 - first_name: Jürgen full_name: Schmidhuber, Jürgen last_name: Schmidhuber - first_name: Olivier full_name: Bachem, Olivier last_name: Bachem citation: ama: 'Steenkiste S van, Locatello F, Schmidhuber J, Bachem O. Are disentangled representations helpful for abstract visual reasoning? In: Advances in Neural Information Processing Systems. Vol 32. ; 2019.' apa: Steenkiste, S. van, Locatello, F., Schmidhuber, J., & Bachem, O. (2019). Are disentangled representations helpful for abstract visual reasoning? In Advances in Neural Information Processing Systems (Vol. 32). Vancouver, Canada. chicago: Steenkiste, Sjoerd van, Francesco Locatello, Jürgen Schmidhuber, and Olivier Bachem. “Are Disentangled Representations Helpful for Abstract Visual Reasoning?” In Advances in Neural Information Processing Systems, Vol. 32, 2019. ieee: S. van Steenkiste, F. Locatello, J. Schmidhuber, and O. Bachem, “Are disentangled representations helpful for abstract visual reasoning?,” in Advances in Neural Information Processing Systems, Vancouver, Canada, 2019, vol. 32. ista: 'Steenkiste S van, Locatello F, Schmidhuber J, Bachem O. 2019. Are disentangled representations helpful for abstract visual reasoning? Advances in Neural Information Processing Systems. NeurIPS: Neural Information Processing Systems vol. 32.' mla: Steenkiste, Sjoerd van, et al. “Are Disentangled Representations Helpful for Abstract Visual Reasoning?” Advances in Neural Information Processing Systems, vol. 32, 2019. short: S. van Steenkiste, F. Locatello, J. Schmidhuber, O. Bachem, in:, Advances in Neural Information Processing Systems, 2019. conference: end_date: 2019-12-14 location: Vancouver, Canada name: 'NeurIPS: Neural Information Processing Systems' start_date: 2019-12-08 date_created: 2023-08-22T14:09:53Z date_published: 2019-05-29T00:00:00Z date_updated: 2024-10-14T12:28:15Z day: '29' department: - _id: FrLo extern: '1' external_id: arxiv: - '1905.12506' intvolume: ' 32' language: - iso: eng main_file_link: - open_access: '1' url: https://doi.org/10.48550/arXiv.1905.12506 month: '05' oa: 1 oa_version: Preprint publication: Advances in Neural Information Processing Systems publication_identifier: isbn: - '9781713807933' publication_status: published quality_controlled: '1' status: public title: Are disentangled representations helpful for abstract visual reasoning? type: conference user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 32 year: '2019' ... --- _id: '14197' abstract: - lang: eng text: "Recently there has been a significant interest in learning disentangled\r\nrepresentations, as they promise increased interpretability, generalization to\r\nunseen scenarios and faster learning on downstream tasks. In this paper, we\r\ninvestigate the usefulness of different notions of disentanglement for\r\nimproving the fairness of downstream prediction tasks based on representations.\r\nWe consider the setting where the goal is to predict a target variable based on\r\nthe learned representation of high-dimensional observations (such as images)\r\nthat depend on both the target variable and an \\emph{unobserved} sensitive\r\nvariable. We show that in this setting both the optimal and empirical\r\npredictions can be unfair, even if the target variable and the sensitive\r\nvariable are independent. Analyzing the representations of more than\r\n\\num{12600} trained state-of-the-art disentangled models, we observe that\r\nseveral disentanglement scores are consistently correlated with increased\r\nfairness, suggesting that disentanglement may be a useful property to encourage\r\nfairness when sensitive variables are not observed." article_processing_charge: No arxiv: 1 author: - first_name: Francesco full_name: Locatello, Francesco id: 26cfd52f-2483-11ee-8040-88983bcc06d4 last_name: Locatello orcid: 0000-0002-4850-0683 - first_name: Gabriele full_name: Abbati, Gabriele last_name: Abbati - first_name: Tom full_name: Rainforth, Tom last_name: Rainforth - first_name: Stefan full_name: Bauer, Stefan last_name: Bauer - first_name: Bernhard full_name: Schölkopf, Bernhard last_name: Schölkopf - first_name: Olivier full_name: Bachem, Olivier last_name: Bachem citation: ama: 'Locatello F, Abbati G, Rainforth T, Bauer S, Schölkopf B, Bachem O. On the fairness of disentangled representations. In: Advances in Neural Information Processing Systems. Vol 32. ; 2019:14611–14624.' apa: Locatello, F., Abbati, G., Rainforth, T., Bauer, S., Schölkopf, B., & Bachem, O. (2019). On the fairness of disentangled representations. In Advances in Neural Information Processing Systems (Vol. 32, pp. 14611–14624). Vancouver, Canada. chicago: Locatello, Francesco, Gabriele Abbati, Tom Rainforth, Stefan Bauer, Bernhard Schölkopf, and Olivier Bachem. “On the Fairness of Disentangled Representations.” In Advances in Neural Information Processing Systems, 32:14611–14624, 2019. ieee: F. Locatello, G. Abbati, T. Rainforth, S. Bauer, B. Schölkopf, and O. Bachem, “On the fairness of disentangled representations,” in Advances in Neural Information Processing Systems, Vancouver, Canada, 2019, vol. 32, pp. 14611–14624. ista: 'Locatello F, Abbati G, Rainforth T, Bauer S, Schölkopf B, Bachem O. 2019. On the fairness of disentangled representations. Advances in Neural Information Processing Systems. NeurIPS: Neural Information Processing Systems vol. 32, 14611–14624.' mla: Locatello, Francesco, et al. “On the Fairness of Disentangled Representations.” Advances in Neural Information Processing Systems, vol. 32, 2019, pp. 14611–14624. short: F. Locatello, G. Abbati, T. Rainforth, S. Bauer, B. Schölkopf, O. Bachem, in:, Advances in Neural Information Processing Systems, 2019, pp. 14611–14624. conference: end_date: 2019-12-14 location: Vancouver, Canada name: 'NeurIPS: Neural Information Processing Systems' start_date: 2019-12-08 date_created: 2023-08-22T14:12:28Z date_published: 2019-12-08T00:00:00Z date_updated: 2024-10-14T12:29:05Z day: '08' department: - _id: FrLo extern: '1' external_id: arxiv: - '1905.13662' intvolume: ' 32' language: - iso: eng main_file_link: - open_access: '1' url: https://arxiv.org/abs/1905.13662 month: '12' oa: 1 oa_version: Preprint page: 14611–14624 publication: Advances in Neural Information Processing Systems publication_identifier: isbn: - '9781713807933' publication_status: published quality_controlled: '1' scopus_import: '1' status: public title: On the fairness of disentangled representations type: conference user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 32 year: '2019' ... --- _id: '14200' abstract: - lang: eng text: "The key idea behind the unsupervised learning of disentangled representations\r\nis that real-world data is generated by a few explanatory factors of variation\r\nwhich can be recovered by unsupervised learning algorithms. In this paper, we\r\nprovide a sober look at recent progress in the field and challenge some common\r\nassumptions. We first theoretically show that the unsupervised learning of\r\ndisentangled representations is fundamentally impossible without inductive\r\nbiases on both the models and the data. Then, we train more than 12000 models\r\ncovering most prominent methods and evaluation metrics in a reproducible\r\nlarge-scale experimental study on seven different data sets. We observe that\r\nwhile the different methods successfully enforce properties ``encouraged'' by\r\nthe corresponding losses, well-disentangled models seemingly cannot be\r\nidentified without supervision. Furthermore, increased disentanglement does not\r\nseem to lead to a decreased sample complexity of learning for downstream tasks.\r\nOur results suggest that future work on disentanglement learning should be\r\nexplicit about the role of inductive biases and (implicit) supervision,\r\ninvestigate concrete benefits of enforcing disentanglement of the learned\r\nrepresentations, and consider a reproducible experimental setup covering\r\nseveral data sets." article_processing_charge: No arxiv: 1 author: - first_name: Francesco full_name: Locatello, Francesco id: 26cfd52f-2483-11ee-8040-88983bcc06d4 last_name: Locatello orcid: 0000-0002-4850-0683 - first_name: Stefan full_name: Bauer, Stefan last_name: Bauer - first_name: Mario full_name: Lucic, Mario last_name: Lucic - first_name: Gunnar full_name: Rätsch, Gunnar last_name: Rätsch - first_name: Sylvain full_name: Gelly, Sylvain last_name: Gelly - first_name: Bernhard full_name: Schölkopf, Bernhard last_name: Schölkopf - first_name: Olivier full_name: Bachem, Olivier last_name: Bachem citation: ama: 'Locatello F, Bauer S, Lucic M, et al. Challenging common assumptions in the unsupervised learning of disentangled representations. In: Proceedings of the 36th International Conference on Machine Learning. Vol 97. ML Research Press; 2019:4114-4124.' apa: 'Locatello, F., Bauer, S., Lucic, M., Rätsch, G., Gelly, S., Schölkopf, B., & Bachem, O. (2019). Challenging common assumptions in the unsupervised learning of disentangled representations. In Proceedings of the 36th International Conference on Machine Learning (Vol. 97, pp. 4114–4124). Long Beach, CA, United States: ML Research Press.' chicago: Locatello, Francesco, Stefan Bauer, Mario Lucic, Gunnar Rätsch, Sylvain Gelly, Bernhard Schölkopf, and Olivier Bachem. “Challenging Common Assumptions in the Unsupervised Learning of Disentangled Representations.” In Proceedings of the 36th International Conference on Machine Learning, 97:4114–24. ML Research Press, 2019. ieee: F. Locatello et al., “Challenging common assumptions in the unsupervised learning of disentangled representations,” in Proceedings of the 36th International Conference on Machine Learning, Long Beach, CA, United States, 2019, vol. 97, pp. 4114–4124. ista: Locatello F, Bauer S, Lucic M, Rätsch G, Gelly S, Schölkopf B, Bachem O. 2019. Challenging common assumptions in the unsupervised learning of disentangled representations. Proceedings of the 36th International Conference on Machine Learning. International Conference on Machine Learning vol. 97, 4114–4124. mla: Locatello, Francesco, et al. “Challenging Common Assumptions in the Unsupervised Learning of Disentangled Representations.” Proceedings of the 36th International Conference on Machine Learning, vol. 97, ML Research Press, 2019, pp. 4114–24. short: F. Locatello, S. Bauer, M. Lucic, G. Rätsch, S. Gelly, B. Schölkopf, O. Bachem, in:, Proceedings of the 36th International Conference on Machine Learning, ML Research Press, 2019, pp. 4114–4124. conference: end_date: 2019-06-15 location: Long Beach, CA, United States name: International Conference on Machine Learning start_date: 2019-06-10 date_created: 2023-08-22T14:13:08Z date_published: 2019-06-09T00:00:00Z date_updated: 2024-10-14T12:29:16Z day: '09' department: - _id: FrLo extern: '1' external_id: arxiv: - '1811.12359' intvolume: ' 97' language: - iso: eng main_file_link: - open_access: '1' url: https://arxiv.org/abs/1811.12359 month: '06' oa: 1 oa_version: Preprint page: 4114-4124 publication: Proceedings of the 36th International Conference on Machine Learning publication_status: published publisher: ML Research Press quality_controlled: '1' scopus_import: '1' status: public title: Challenging common assumptions in the unsupervised learning of disentangled representations type: conference user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 97 year: '2019' ... --- _id: '14299' abstract: - lang: eng text: DNA origami nano-objects are usually designed around generic single-stranded “scaffolds”. Many properties of the target object are determined by details of those generic scaffold sequences. Here, we enable designers to fully specify the target structure not only in terms of desired 3D shape but also in terms of the sequences used. To this end, we built design tools to construct scaffold sequences de novo based on strand diagrams, and we developed scalable production methods for creating design-specific scaffold strands with fully user-defined sequences. We used 17 custom scaffolds having different lengths and sequence properties to study the influence of sequence redundancy and sequence composition on multilayer DNA origami assembly and to realize efficient one-pot assembly of multiscaffold DNA origami objects. Furthermore, as examples for functionalized scaffolds, we created a scaffold that enables direct, covalent cross-linking of DNA origami via UV irradiation, and we built DNAzyme-containing scaffolds that allow postfolding DNA origami domain separation. article_processing_charge: No article_type: original author: - first_name: Engelhardt full_name: FAS, Engelhardt last_name: FAS - first_name: Florian M full_name: Praetorius, Florian M id: dfec9381-4341-11ee-8fd8-faa02bba7d62 last_name: Praetorius - first_name: CH full_name: Wachauf, CH last_name: Wachauf - first_name: G full_name: Brüggenthies, G last_name: Brüggenthies - first_name: F full_name: Kohler, F last_name: Kohler - first_name: B full_name: Kick, B last_name: Kick - first_name: KL full_name: Kadletz, KL last_name: Kadletz - first_name: PN full_name: Pham, PN last_name: Pham - first_name: KL full_name: Behler, KL last_name: Behler - first_name: T full_name: Gerling, T last_name: Gerling - first_name: H full_name: Dietz, H last_name: Dietz citation: ama: FAS E, Praetorius FM, Wachauf C, et al. Custom-size, functional, and durable DNA origami with design-specific scaffolds. ACS Nano. 2019;13(5):5015-5027. doi:10.1021/acsnano.9b01025 apa: FAS, E., Praetorius, F. M., Wachauf, C., Brüggenthies, G., Kohler, F., Kick, B., … Dietz, H. (2019). Custom-size, functional, and durable DNA origami with design-specific scaffolds. ACS Nano. ACS Publications. https://doi.org/10.1021/acsnano.9b01025 chicago: FAS, Engelhardt, Florian M Praetorius, CH Wachauf, G Brüggenthies, F Kohler, B Kick, KL Kadletz, et al. “Custom-Size, Functional, and Durable DNA Origami with Design-Specific Scaffolds.” ACS Nano. ACS Publications, 2019. https://doi.org/10.1021/acsnano.9b01025. ieee: E. FAS et al., “Custom-size, functional, and durable DNA origami with design-specific scaffolds,” ACS Nano, vol. 13, no. 5. ACS Publications, pp. 5015–5027, 2019. ista: FAS E, Praetorius FM, Wachauf C, Brüggenthies G, Kohler F, Kick B, Kadletz K, Pham P, Behler K, Gerling T, Dietz H. 2019. Custom-size, functional, and durable DNA origami with design-specific scaffolds. ACS Nano. 13(5), 5015–5027. mla: FAS, Engelhardt, et al. “Custom-Size, Functional, and Durable DNA Origami with Design-Specific Scaffolds.” ACS Nano, vol. 13, no. 5, ACS Publications, 2019, pp. 5015–27, doi:10.1021/acsnano.9b01025. short: E. FAS, F.M. Praetorius, C. Wachauf, G. Brüggenthies, F. Kohler, B. Kick, K. Kadletz, P. Pham, K. Behler, T. Gerling, H. Dietz, ACS Nano 13 (2019) 5015–5027. date_created: 2023-09-06T12:48:47Z date_published: 2019-04-16T00:00:00Z date_updated: 2023-11-07T12:17:31Z day: '16' doi: 10.1021/acsnano.9b01025 extern: '1' external_id: pmid: - '30990672' intvolume: ' 13' issue: '5' language: - iso: eng main_file_link: - open_access: '1' url: https://doi.org/10.1021/acsnano.9b01025 month: '04' oa: 1 oa_version: Published Version page: 5015-5027 pmid: 1 publication: ACS Nano publication_identifier: eissn: - 1936-086x issn: - 1936-0851 publication_status: published publisher: ACS Publications quality_controlled: '1' scopus_import: '1' status: public title: Custom-size, functional, and durable DNA origami with design-specific scaffolds type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 13 year: '2019' ... --- OA_type: closed access _id: '17915' abstract: - lang: eng text: The construction of self-assembled iron phthalocyanine (FePc) systems on gold electrodes modified by self-assembled monolayers (SAMs) is becoming an interesting strategy for obtaining electrocatalytic molecular building blocks for the oxygen reduction reaction (ORR). In this work, we have measured the conductance of pyridiniums axial ligands at the single molecule level using the scanning tunneling microscope-based break-junction method (STM-Break Junction) to study the role of the axial ligand on the activity of the self-assembled FePc systems on a gold electrode surface. The electron-pulling effect of pyridinium axial ligands is known to increase the electrocatalytic activity of FePc for the oxygen reduction reaction (ORR). We have used these systems as a platform for carrying out a comparative study for understanding the real influence of the proximal axial ligands. Further, these ligands act as molecular wires between the gold electrode surface and the FePc molecule. The pyridinium molecules were synthesized following a series of structural variations using a basic molecular backbone. From conductance measurements obtained for each pyridinium molecule, it was possible to establish that electron transport through each pyridinium does not influence the activity of FePc for ORR in alkaline media. In addition, the DFT calculations shows that the axial ligand in FePc modifies its catalytic activity by decreasing the binding energy of O2 to the Fe site. article_number: '134996' article_processing_charge: No article_type: original author: - first_name: Cristian full_name: Gutiérrez-Ceron, Cristian last_name: Gutiérrez-Ceron - first_name: Rubén full_name: Oñate, Rubén last_name: Oñate - first_name: José H. full_name: Zagal, José H. last_name: Zagal - first_name: Ana full_name: Pizarro, Ana last_name: Pizarro - first_name: J. Francisco full_name: Silva, J. Francisco last_name: Silva - first_name: Carmen full_name: Castro-Castillo, Carmen last_name: Castro-Castillo - first_name: Marcos Caroli full_name: Rezende, Marcos Caroli last_name: Rezende - first_name: Marcos full_name: Flores, Marcos last_name: Flores - first_name: Diego full_name: Cortés-Arriagada, Diego last_name: Cortés-Arriagada - first_name: Alejandro full_name: Toro-Labbé, Alejandro last_name: Toro-Labbé - first_name: Luis M. full_name: Campos, Luis M. last_name: Campos - first_name: Latha full_name: Venkataraman, Latha id: 9ebb78a5-cc0d-11ee-8322-fae086a32caf last_name: Venkataraman orcid: 0000-0002-6957-6089 - first_name: Ingrid full_name: Ponce, Ingrid last_name: Ponce citation: ama: 'Gutiérrez-Ceron C, Oñate R, Zagal JH, et al. Molecular conductance versus inductive effects of axial ligands on the electrocatalytic activity of self-assembled iron phthalocyanines: The oxygen reduction reaction. Electrochimica Acta. 2019;327. doi:10.1016/j.electacta.2019.134996' apa: 'Gutiérrez-Ceron, C., Oñate, R., Zagal, J. H., Pizarro, A., Silva, J. F., Castro-Castillo, C., … Ponce, I. (2019). Molecular conductance versus inductive effects of axial ligands on the electrocatalytic activity of self-assembled iron phthalocyanines: The oxygen reduction reaction. Electrochimica Acta. Elsevier. https://doi.org/10.1016/j.electacta.2019.134996' chicago: 'Gutiérrez-Ceron, Cristian, Rubén Oñate, José H. Zagal, Ana Pizarro, J. Francisco Silva, Carmen Castro-Castillo, Marcos Caroli Rezende, et al. “Molecular Conductance versus Inductive Effects of Axial Ligands on the Electrocatalytic Activity of Self-Assembled Iron Phthalocyanines: The Oxygen Reduction Reaction.” Electrochimica Acta. Elsevier, 2019. https://doi.org/10.1016/j.electacta.2019.134996.' ieee: 'C. Gutiérrez-Ceron et al., “Molecular conductance versus inductive effects of axial ligands on the electrocatalytic activity of self-assembled iron phthalocyanines: The oxygen reduction reaction,” Electrochimica Acta, vol. 327. Elsevier, 2019.' ista: 'Gutiérrez-Ceron C, Oñate R, Zagal JH, Pizarro A, Silva JF, Castro-Castillo C, Rezende MC, Flores M, Cortés-Arriagada D, Toro-Labbé A, Campos LM, Venkataraman L, Ponce I. 2019. Molecular conductance versus inductive effects of axial ligands on the electrocatalytic activity of self-assembled iron phthalocyanines: The oxygen reduction reaction. Electrochimica Acta. 327, 134996.' mla: 'Gutiérrez-Ceron, Cristian, et al. “Molecular Conductance versus Inductive Effects of Axial Ligands on the Electrocatalytic Activity of Self-Assembled Iron Phthalocyanines: The Oxygen Reduction Reaction.” Electrochimica Acta, vol. 327, 134996, Elsevier, 2019, doi:10.1016/j.electacta.2019.134996.' short: C. Gutiérrez-Ceron, R. Oñate, J.H. Zagal, A. Pizarro, J.F. Silva, C. Castro-Castillo, M.C. Rezende, M. Flores, D. Cortés-Arriagada, A. Toro-Labbé, L.M. Campos, L. Venkataraman, I. Ponce, Electrochimica Acta 327 (2019). date_created: 2024-09-09T07:39:29Z date_published: 2019-12-10T00:00:00Z date_updated: 2024-12-10T12:30:09Z day: '10' doi: 10.1016/j.electacta.2019.134996 extern: '1' intvolume: ' 327' language: - iso: eng month: '12' oa_version: None publication: Electrochimica Acta publication_identifier: issn: - 0013-4686 publication_status: published publisher: Elsevier quality_controlled: '1' scopus_import: '1' status: public title: 'Molecular conductance versus inductive effects of axial ligands on the electrocatalytic activity of self-assembled iron phthalocyanines: The oxygen reduction reaction' type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 327 year: '2019' ...