---
_id: '17136'
abstract:
- lang: eng
  text: "This paper focuses on Majority Dynamics in sparse graphs, in particular,
    as a\r\ntool to study internal cuts. It is known that, in Majority Dynamics on
    a finite\r\ngraph, each vertex eventually either comes to a fixed state, or oscillates
    with\r\nperiod two. The empirical evidence acquired by simulations suggests that
    for\r\nrandom odd-regular graphs, approximately half of the vertices end up\r\noscillating
    with high probability. We notice a local symmetry between\r\noscillating and non-oscillating
    vertices, that potentially can explain why the\r\nfraction of the oscillating
    vertices is concentrated around $\\frac{1}{2}$. In\r\nour simulations, we observe
    that the parts of random odd-regular graph under\r\nMajority Dynamics with high
    probability do not contain $\\lceil \\frac{d}{2}\r\n\\rceil$-cores at any timestep,
    and thus, one cannot use Majority Dynamics to\r\nprove that internal cuts exist
    in odd-regular graphs almost surely. However, we\r\nsuggest a modification of
    Majority Dynamics, that yields parts with desired\r\ncores with high probability."
acknowledgement: "I am grateful to Matthew Kwan for setting the problem, providing
  useful literature,\r\nfruitful discussions, text review, mentorship, general encouragement
  and support."
article_number: '2406.07026'
article_processing_charge: No
arxiv: 1
author:
- first_name: Pavel
  full_name: Arkhipov, Pavel
  id: b25f2ab2-1fed-11ee-8599-fe02d211784f
  last_name: Arkhipov
citation:
  ama: 'Arkhipov P. Majority dynamics and internal partitions of random regular graphs:
    Experimental results. <i>arXiv</i>. doi:<a href="https://doi.org/10.48550/arXiv.2406.07026">10.48550/arXiv.2406.07026</a>'
  apa: 'Arkhipov, P. (n.d.). Majority dynamics and internal partitions of random regular
    graphs: Experimental results. <i>arXiv</i>. <a href="https://doi.org/10.48550/arXiv.2406.07026">https://doi.org/10.48550/arXiv.2406.07026</a>'
  chicago: 'Arkhipov, Pavel. “Majority Dynamics and Internal Partitions of Random
    Regular Graphs: Experimental Results.” <i>ArXiv</i>, n.d. <a href="https://doi.org/10.48550/arXiv.2406.07026">https://doi.org/10.48550/arXiv.2406.07026</a>.'
  ieee: 'P. Arkhipov, “Majority dynamics and internal partitions of random regular
    graphs: Experimental results,” <i>arXiv</i>. .'
  ista: 'Arkhipov P. Majority dynamics and internal partitions of random regular graphs:
    Experimental results. arXiv, 2406.07026.'
  mla: 'Arkhipov, Pavel. “Majority Dynamics and Internal Partitions of Random Regular
    Graphs: Experimental Results.” <i>ArXiv</i>, 2406.07026, doi:<a href="https://doi.org/10.48550/arXiv.2406.07026">10.48550/arXiv.2406.07026</a>.'
  short: P. Arkhipov, ArXiv (n.d.).
das_tickbox: '0'
date_created: 2024-06-12T07:01:52Z
date_published: 2024-06-11T00:00:00Z
date_updated: 2026-10-02T11:06:38Z
day: '11'
department:
- _id: GradSch
doi: 10.48550/arXiv.2406.07026
external_id:
  arxiv:
  - '2406.07026'
fulldoi: https://doi.org/10.48550/arXiv.2406.07026
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://doi.org/10.48550/arXiv.2406.07026
month: '06'
oa: 1
oa_version: Preprint
publication: arXiv
publication_status: submitted
researchdata_availability: yes
status: public
supplementarymaterial: no
title: 'Majority dynamics and internal partitions of random regular graphs: Experimental
  results'
type: preprint
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
year: '2024'
...
---
_id: '18174'
abstract:
- lang: eng
  text: We investigate the phase ordering (pattern formation) of systems of two-dimensional
    core–shell particles using Monte Carlo (MC) computer simulations and classical
    density functional theory (DFT). The particles interact via a pair potential having
    a hard core and a repulsive square shoulder. Our simulations show that on cooling,
    the liquid state structure becomes increasingly characterized by long wavelength
    density modulations and on further cooling forms a variety of other phases, including
    clustered, striped, and other patterned phases. In DFT, the hard core part of
    the potential is treated using either fundamental measure theory or a simple local
    density approximation, whereas the soft shoulder is treated using the random phase
    approximation. The different DFTs are benchmarked using large-scale grand-canonical-MC
    and Gibbs-ensemble-MC simulations, demonstrating their predictive capabilities
    and shortcomings. We find that having the liquid state static structure factor
    S(k) for wavenumber k is sufficient to identify the Fourier modes governing both
    the liquid and solid phases. This allows us to identify from easier-to-obtain
    liquid state data the wavenumbers relevant to the periodic phases and to predict
    roughly where in the phase diagram these patterned phases arise.
acknowledgement: The computational results presented here were enabled via a generous
  share of CPU time, offered by the Vienna Scientific Cluster (VSC) under Project
  No. 71263. The authors thank Ms. Katrin Muck for her guidance related to the use
  of HPC. A.J.A. gratefully acknowledges support from the EPSRC under Grant No. EP/P015689/1.
article_number: '124503 '
article_processing_charge: Yes (in subscription journal)
article_type: original
arxiv: 1
author:
- first_name: Michael
  full_name: Wassermair, Michael
  id: 23d132c4-4e98-11ef-b275-9e8d4cd8c917
  last_name: Wassermair
  orcid: 0009-0003-6339-4051
- first_name: Gerhard
  full_name: Kahl, Gerhard
  last_name: Kahl
- first_name: Roland
  full_name: Roth, Roland
  last_name: Roth
- first_name: Andrew J.
  full_name: Archer, Andrew J.
  last_name: Archer
citation:
  ama: Wassermair M, Kahl G, Roth R, Archer AJ. Fingerprints of ordered self-assembled
    structures in the liquid phase of a hard-core, square-shoulder system. <i>The
    Journal of chemical physics</i>. 2024;161(12). doi:<a href="https://doi.org/10.1063/5.0226954">10.1063/5.0226954</a>
  apa: Wassermair, M., Kahl, G., Roth, R., &#38; Archer, A. J. (2024). Fingerprints
    of ordered self-assembled structures in the liquid phase of a hard-core, square-shoulder
    system. <i>The Journal of Chemical Physics</i>. AIP Publishing. <a href="https://doi.org/10.1063/5.0226954">https://doi.org/10.1063/5.0226954</a>
  chicago: Wassermair, Michael, Gerhard Kahl, Roland Roth, and Andrew J. Archer. “Fingerprints
    of Ordered Self-Assembled Structures in the Liquid Phase of a Hard-Core, Square-Shoulder
    System.” <i>The Journal of Chemical Physics</i>. AIP Publishing, 2024. <a href="https://doi.org/10.1063/5.0226954">https://doi.org/10.1063/5.0226954</a>.
  ieee: M. Wassermair, G. Kahl, R. Roth, and A. J. Archer, “Fingerprints of ordered
    self-assembled structures in the liquid phase of a hard-core, square-shoulder
    system,” <i>The Journal of chemical physics</i>, vol. 161, no. 12. AIP Publishing,
    2024.
  ista: Wassermair M, Kahl G, Roth R, Archer AJ. 2024. Fingerprints of ordered self-assembled
    structures in the liquid phase of a hard-core, square-shoulder system. The Journal
    of chemical physics. 161(12), 124503.
  mla: Wassermair, Michael, et al. “Fingerprints of Ordered Self-Assembled Structures
    in the Liquid Phase of a Hard-Core, Square-Shoulder System.” <i>The Journal of
    Chemical Physics</i>, vol. 161, no. 12, 124503, AIP Publishing, 2024, doi:<a href="https://doi.org/10.1063/5.0226954">10.1063/5.0226954</a>.
  short: M. Wassermair, G. Kahl, R. Roth, A.J. Archer, The Journal of Chemical Physics
    161 (2024).
corr_author: '1'
das_tickbox: '1'
dataavailabilitystatement: The data that support the findings of this study are available
  from the corresponding author upon reasonable request.
date_created: 2024-10-06T22:01:12Z
date_published: 2024-09-28T00:00:00Z
date_updated: 2026-10-02T11:10:03Z
day: '28'
ddc:
- '530'
department:
- _id: GradSch
doi: 10.1063/5.0226954
external_id:
  arxiv:
  - '2409.06447'
  isi:
  - '001325268300004'
  pmid:
  - '39344889'
file:
- access_level: open_access
  checksum: f3874e64ef94e94b2376f00a1fee24c3
  content_type: application/pdf
  creator: dernst
  date_created: 2024-10-07T11:25:00Z
  date_updated: 2024-10-07T11:25:00Z
  file_id: '18185'
  file_name: 2024_JourChemicalPhysics_Wassermair.pdf
  file_size: 15009000
  relation: main_file
  success: 1
file_date_updated: 2024-10-07T11:25:00Z
fulldoi: https://doi.org/10.1063/5.0226954
has_accepted_license: '1'
intvolume: '       161'
isi: 1
issue: '12'
language:
- iso: eng
license: https://creativecommons.org/licenses/by/4.0/
month: '09'
oa: 1
oa_version: Published Version
pmid: 1
publication: The Journal of chemical physics
publication_identifier:
  eissn:
  - 1089-7690
publication_status: published
publisher: AIP Publishing
quality_controlled: '1'
researchdata_availability: upon request
scopus_import: '1'
status: public
supplementarymaterial: yes
title: Fingerprints of ordered self-assembled structures in the liquid phase of a
  hard-core, square-shoulder 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: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 161
year: '2024'
...
---
_id: '14653'
abstract:
- lang: eng
  text: 'Mass spectrometry imaging (MSI) is a powerful analytical technique for the
    two-dimensional (2D) localization of chemicals on surfaces. Conventional MSI experiments
    require to predefine the surface of interest based on photographic or microscopic
    images. Typically, these boundaries can no longer be changed or adjusted once
    the experiment has been started. In terms of a more interactive approach we recently
    developed a pen-like ionization interface which is directly connected to the mass
    spectrometer. The device allows the user to ionize chemicals by desorption electrospray
    ionization (DESI) and to freely move the interface over a surface of interest.
    A mini camera, which is mounted on the tip of the pen, magnifies the desorption
    area and enables a simple positioning of the pen. The combination of optical data
    from the camera module and chemical data obtained by mass analysis facilitates
    a novel type of imaging experiment: interactive mass spectrometry imaging (IMSI).
    For this application, we present a novel approach for a robust, optical flow-based
    motion detection. While the live video stream from the camera is used to track
    the pen''s motion across the surface a post-acquisition algorithm correlates the
    coordinates of the pen trajectory with respective mass spectra obtained from a
    simultaneous mass spectrometric data acquisition. This algorithm is no longer
    dependent on a single, manually applied optical marker on the sample surface,
    which has to be visible on all video frames throughout the analysis. The advanced
    DESI-IMSI method was successfully tested on inkjet-printed letters as well as
    mouse brain tissue samples. Validation of the results was done by comparing DESI-IMSI
    with standard DESI-MSI data.'
acknowledgement: We would like to thank Marco Sealey Cardona, PhD for help with the
  mouse brain samples and acknowledge the financial support by 1669 Förderkreis of
  the University of Innsbruck, Austria Wirtschaftsservice (AWS), D. Swarovski KG and
  Tyrolean Science Fund (TWF).
article_number: '117168'
article_processing_charge: Yes (in subscription journal)
article_type: original
author:
- first_name: Florian
  full_name: Kluibenschedl, Florian
  id: 7499e70e-eb2c-11ec-b98b-f925648bc9d9
  last_name: Kluibenschedl
  orcid: 0000-0003-4695-5526
- first_name: Anna
  full_name: Ploner, Anna
  last_name: Ploner
- first_name: Christina
  full_name: Meisenbichler, Christina
  last_name: Meisenbichler
- first_name: Robert
  full_name: Konrat, Robert
  last_name: Konrat
- first_name: Thomas
  full_name: Müller, Thomas
  last_name: Müller
citation:
  ama: Kluibenschedl F, Ploner A, Meisenbichler C, Konrat R, Müller T. Advanced motion
    tracking for interactive mass spectrometry imaging (IMSI). <i>International Journal
    of Mass Spectrometry</i>. 2024;495. doi:<a href="https://doi.org/10.1016/j.ijms.2023.117168">10.1016/j.ijms.2023.117168</a>
  apa: Kluibenschedl, F., Ploner, A., Meisenbichler, C., Konrat, R., &#38; Müller,
    T. (2024). Advanced motion tracking for interactive mass spectrometry imaging
    (IMSI). <i>International Journal of Mass Spectrometry</i>. Elsevier. <a href="https://doi.org/10.1016/j.ijms.2023.117168">https://doi.org/10.1016/j.ijms.2023.117168</a>
  chicago: Kluibenschedl, Florian, Anna Ploner, Christina Meisenbichler, Robert Konrat,
    and Thomas Müller. “Advanced Motion Tracking for Interactive Mass Spectrometry
    Imaging (IMSI).” <i>International Journal of Mass Spectrometry</i>. Elsevier,
    2024. <a href="https://doi.org/10.1016/j.ijms.2023.117168">https://doi.org/10.1016/j.ijms.2023.117168</a>.
  ieee: F. Kluibenschedl, A. Ploner, C. Meisenbichler, R. Konrat, and T. Müller, “Advanced
    motion tracking for interactive mass spectrometry imaging (IMSI),” <i>International
    Journal of Mass Spectrometry</i>, vol. 495. Elsevier, 2024.
  ista: Kluibenschedl F, Ploner A, Meisenbichler C, Konrat R, Müller T. 2024. Advanced
    motion tracking for interactive mass spectrometry imaging (IMSI). International
    Journal of Mass Spectrometry. 495, 117168.
  mla: Kluibenschedl, Florian, et al. “Advanced Motion Tracking for Interactive Mass
    Spectrometry Imaging (IMSI).” <i>International Journal of Mass Spectrometry</i>,
    vol. 495, 117168, Elsevier, 2024, doi:<a href="https://doi.org/10.1016/j.ijms.2023.117168">10.1016/j.ijms.2023.117168</a>.
  short: F. Kluibenschedl, A. Ploner, C. Meisenbichler, R. Konrat, T. Müller, International
    Journal of Mass Spectrometry 495 (2024).
das_tickbox: '1'
dataavailabilitystatement: Data will be made available on request.
date_created: 2023-12-10T23:00:57Z
date_published: 2024-01-01T00:00:00Z
date_updated: 2026-10-02T11:07:09Z
day: '01'
ddc:
- '540'
department:
- _id: GradSch
doi: 10.1016/j.ijms.2023.117168
external_id:
  isi:
  - '001125054400001'
file:
- access_level: open_access
  checksum: 6c5eb6dc07af70a59251d2c6fed38894
  content_type: application/pdf
  creator: dernst
  date_created: 2024-07-16T08:27:34Z
  date_updated: 2024-07-16T08:27:34Z
  file_id: '17256'
  file_name: 2024_IJMS_Kluibenschedl.pdf
  file_size: 3003139
  relation: main_file
  success: 1
file_date_updated: 2024-07-16T08:27:34Z
fulldoi: https://doi.org/10.1016/j.ijms.2023.117168
has_accepted_license: '1'
intvolume: '       495'
isi: 1
language:
- iso: eng
month: '01'
oa: 1
oa_version: Published Version
publication: International Journal of Mass Spectrometry
publication_identifier:
  issn:
  - 1387-3806
publication_status: published
publisher: Elsevier
quality_controlled: '1'
researchdata_availability: upon request
scopus_import: '1'
status: public
supplementarymaterial: yes
title: Advanced motion tracking for interactive mass spectrometry imaging (IMSI)
tmp:
  image: /images/cc_by.png
  legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
  name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
  short: CC BY (4.0)
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 495
year: '2024'
...
---
DOAJ_listed: '1'
OA_place: publisher
OA_type: gold
_id: '15407'
abstract:
- lang: eng
  text: We propose and implement a family of quantum-informed recursive optimization
    (QIRO) algorithms for combinatorial optimization problems. Our approach leverages
    quantum resources to obtain information that is used in problem-specific classical
    reduction steps that recursively simplify the problem. These reduction steps address
    the limitations of the quantum component (e.g., locality) and ensure solution
    feasibility in constrained optimization problems. Additionally, we use backtracking
    techniques to further improve the performance of the algorithm without increasing
    the requirements on the quantum hardware. We showcase the capabilities of our
    approach by informing QIRO with correlations from classical simulations of shallow
    circuits of the quantum approximate optimization algorithm, solving instances
    of maximum independent set and maximum satisfiability problems with hundreds of
    variables. We also demonstrate how QIRO can be deployed on a neutral atom quantum
    processor to find large independent sets of graphs. In summary, our scheme achieves
    results comparable to classical heuristics even with relatively weak quantum resources.
    Furthermore, enhancing the quality of these quantum resources improves the performance
    of the algorithms. Notably, the modular nature of QIRO offers various avenues
    for modifications, positioning our work as a template for a broader class of hybrid
    quantum-classical algorithms for combinatorial optimization.
acknowledgement: J.R.F. and A.K. thank Libor Caha and Alexander Kliesch for insightful
  discussions. The authors thank Lilly Palackal, Maximilian Passek, Carlos Riofrío,
  and Gili Rosenberg for thorough reviews of the manuscript, and the Amazon Braket,
  BMW, and QuEra teams for their support. C.M. thanks the Munich Quantum Valley initiative,
  which is supported by the Bavarian State Government with funds from the Hightech
  Agenda Bayern Plus. H.G.K. would like to thank Am Platzl 1A for providing the necessary
  environment for creative thinking. An open-source implementation of QIRO is available
  online [60].
article_number: '020327'
article_processing_charge: Yes
article_type: original
arxiv: 1
author:
- first_name: Jernej Rudi
  full_name: Finžgar, Jernej Rudi
  last_name: Finžgar
- first_name: Aron
  full_name: Kerschbaumer, Aron
  id: ade85a9c-3200-11ee-973b-91c1eb240410
  last_name: Kerschbaumer
  orcid: 0009-0002-2370-8661
- first_name: Martin J.A.
  full_name: Schuetz, Martin J.A.
  last_name: Schuetz
- first_name: Christian B.
  full_name: Mendl, Christian B.
  last_name: Mendl
- first_name: Helmut G.
  full_name: Katzgraber, Helmut G.
  last_name: Katzgraber
citation:
  ama: Finžgar JR, Kerschbaumer A, Schuetz MJA, Mendl CB, Katzgraber HG. Quantum-informed
    recursive optimization algorithms. <i>PRX Quantum</i>. 2024;5(2). doi:<a href="https://doi.org/10.1103/PRXQuantum.5.020327">10.1103/PRXQuantum.5.020327</a>
  apa: Finžgar, J. R., Kerschbaumer, A., Schuetz, M. J. A., Mendl, C. B., &#38; Katzgraber,
    H. G. (2024). Quantum-informed recursive optimization algorithms. <i>PRX Quantum</i>.
    American Physical Society. <a href="https://doi.org/10.1103/PRXQuantum.5.020327">https://doi.org/10.1103/PRXQuantum.5.020327</a>
  chicago: Finžgar, Jernej Rudi, Aron Kerschbaumer, Martin J.A. Schuetz, Christian
    B. Mendl, and Helmut G. Katzgraber. “Quantum-Informed Recursive Optimization Algorithms.”
    <i>PRX Quantum</i>. American Physical Society, 2024. <a href="https://doi.org/10.1103/PRXQuantum.5.020327">https://doi.org/10.1103/PRXQuantum.5.020327</a>.
  ieee: J. R. Finžgar, A. Kerschbaumer, M. J. A. Schuetz, C. B. Mendl, and H. G. Katzgraber,
    “Quantum-informed recursive optimization algorithms,” <i>PRX Quantum</i>, vol.
    5, no. 2. American Physical Society, 2024.
  ista: Finžgar JR, Kerschbaumer A, Schuetz MJA, Mendl CB, Katzgraber HG. 2024. Quantum-informed
    recursive optimization algorithms. PRX Quantum. 5(2), 020327.
  mla: Finžgar, Jernej Rudi, et al. “Quantum-Informed Recursive Optimization Algorithms.”
    <i>PRX Quantum</i>, vol. 5, no. 2, 020327, American Physical Society, 2024, doi:<a
    href="https://doi.org/10.1103/PRXQuantum.5.020327">10.1103/PRXQuantum.5.020327</a>.
  short: J.R. Finžgar, A. Kerschbaumer, M.J.A. Schuetz, C.B. Mendl, H.G. Katzgraber,
    PRX Quantum 5 (2024).
corr_author: '1'
das_tickbox: '0'
date_created: 2024-05-19T22:01:13Z
date_published: 2024-05-01T00:00:00Z
date_updated: 2026-10-02T11:07:49Z
day: '01'
ddc:
- '530'
department:
- _id: GradSch
doi: 10.1103/PRXQuantum.5.020327
external_id:
  arxiv:
  - '2308.13607'
file:
- access_level: open_access
  checksum: 76bdf0b4dc06d59d073a57bd6957a96c
  content_type: application/pdf
  creator: dernst
  date_created: 2024-05-21T09:35:14Z
  date_updated: 2024-05-21T09:35:14Z
  file_id: '15409'
  file_name: 2024_PRXQuantum_Finzgar.pdf
  file_size: 2016085
  relation: main_file
  success: 1
file_date_updated: 2024-05-21T09:35:14Z
fulldoi: https://doi.org/10.1103/PRXQuantum.5.020327
has_accepted_license: '1'
intvolume: '         5'
issue: '2'
language:
- iso: eng
month: '05'
oa: 1
oa_version: Published Version
publication: PRX Quantum
publication_identifier:
  eissn:
  - 2691-3399
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
researchdata_availability: no
scopus_import: '1'
status: public
supplementarymaterial: yes
title: Quantum-informed recursive optimization algorithms
tmp:
  image: /images/cc_by.png
  legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
  name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
  short: CC BY (4.0)
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 5
year: '2024'
...
---
_id: '15360'
abstract:
- lang: eng
  text: We investigate superradiant enhancements in the refrigeration performance
    of a set of N three-level systems that are collectively coupled to a hot and a
    cold thermal reservoir and are additionally subject to collective periodic (circular)
    driving. Assuming the system-reservoir coupling to be weak, we explore the regime
    of stronger periodic driving strengths by comparing collective weak driving, Floquet-Lindblad,
    and Floquet-Redfield master equations. We identify regimes where the power injected
    by the periodic driving is used to pump heat from the cold to the hot reservoir
    and derive analytic sufficient conditions for them based on a cycle analysis of
    the Floquet-Lindblad master equation. In those regimes, we also argue for which
    parameters collective enhancements like a quadratic scaling of the cooling current
    with N can be expected and support our arguments by numerical simulations.
acknowledgement: "Financial support by the DFG (project ID 278162697 – SFB 1242) is
  gratefully acknowledged.\r\n"
article_number: '044050'
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Dmytro
  full_name: Kolisnyk, Dmytro
  id: 530a7320-5355-11ee-ae5a-82a46997aaa7
  last_name: Kolisnyk
  orcid: 0000-0002-8612-8202
- first_name: Friedemann
  full_name: Queißer, Friedemann
  last_name: Queißer
- first_name: Gernot
  full_name: Schaller, Gernot
  last_name: Schaller
- first_name: Ralf
  full_name: Schützhold, Ralf
  last_name: Schützhold
citation:
  ama: Kolisnyk D, Queißer F, Schaller G, Schützhold R. Floquet analysis of a superradiant
    many-qutrit refrigerator. <i>Physical Review Applied</i>. 2024;21(4). doi:<a href="https://doi.org/10.1103/PhysRevApplied.21.044050">10.1103/PhysRevApplied.21.044050</a>
  apa: Kolisnyk, D., Queißer, F., Schaller, G., &#38; Schützhold, R. (2024). Floquet
    analysis of a superradiant many-qutrit refrigerator. <i>Physical Review Applied</i>.
    American Physical Society. <a href="https://doi.org/10.1103/PhysRevApplied.21.044050">https://doi.org/10.1103/PhysRevApplied.21.044050</a>
  chicago: Kolisnyk, Dmytro, Friedemann Queißer, Gernot Schaller, and Ralf Schützhold.
    “Floquet Analysis of a Superradiant Many-Qutrit Refrigerator.” <i>Physical Review
    Applied</i>. American Physical Society, 2024. <a href="https://doi.org/10.1103/PhysRevApplied.21.044050">https://doi.org/10.1103/PhysRevApplied.21.044050</a>.
  ieee: D. Kolisnyk, F. Queißer, G. Schaller, and R. Schützhold, “Floquet analysis
    of a superradiant many-qutrit refrigerator,” <i>Physical Review Applied</i>, vol.
    21, no. 4. American Physical Society, 2024.
  ista: Kolisnyk D, Queißer F, Schaller G, Schützhold R. 2024. Floquet analysis of
    a superradiant many-qutrit refrigerator. Physical Review Applied. 21(4), 044050.
  mla: Kolisnyk, Dmytro, et al. “Floquet Analysis of a Superradiant Many-Qutrit Refrigerator.”
    <i>Physical Review Applied</i>, vol. 21, no. 4, 044050, American Physical Society,
    2024, doi:<a href="https://doi.org/10.1103/PhysRevApplied.21.044050">10.1103/PhysRevApplied.21.044050</a>.
  short: D. Kolisnyk, F. Queißer, G. Schaller, R. Schützhold, Physical Review Applied
    21 (2024).
das_tickbox: '0'
date_created: 2024-05-05T22:01:04Z
date_published: 2024-04-26T00:00:00Z
date_updated: 2026-10-02T11:07:26Z
day: '26'
department:
- _id: GradSch
doi: 10.1103/PhysRevApplied.21.044050
external_id:
  arxiv:
  - '2310.18126'
  isi:
  - '001226579400001'
fulldoi: https://doi.org/10.1103/PhysRevApplied.21.044050
intvolume: '        21'
isi: 1
issue: '4'
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://doi.org/10.48550/arXiv.2310.18126
month: '04'
oa: 1
oa_version: Preprint
publication: Physical Review Applied
publication_identifier:
  eissn:
  - 2331-7019
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
researchdata_availability: no
scopus_import: '1'
status: public
supplementarymaterial: yes
title: Floquet analysis of a superradiant many-qutrit refrigerator
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 21
year: '2024'
...
---
OA_type: closed access
_id: '18482'
abstract:
- lang: eng
  text: "This paper is dedicated to an optimization problem. Let A, B ⊂ Rn be compact
    convex sets. Consider the minimal number t0 > 0 such that t0B covers A after a
    shift to a vector x0 ∈ \r\nRn. The goal is to find t0 and x0. In the special case
    of B being a unit ball centered at zero, x0 and t0 are known as the Chebyshev
    center and the Chebyshev radius of A. This paper focuses on the case in which
    A and B are defined with their black-box support functions. An algorithm for solving
    such problems efficiently is suggested. The algorithm has a superlinear convergence
    rate, and it can solve hundred-dimensional test problems in a reasonable time,
    but some additional conditions on A and B are required to guarantee the presence
    of convergence. Additionally, the behavior of the algorithm for a simple special
    case is investigated, which leads to a number of theoretical results. Perturbations
    of this special case are also studied."
acknowledgement: The author is grateful to Maxim Balashov for setting the problem,
  providing useful literature, important discussions and text review. Also, I thank
  Dmitry Tsarev and Kseniia Petukhova for meaningful talks and support.
article_processing_charge: No
article_type: original
author:
- first_name: Pavel
  full_name: Arkhipov, Pavel
  id: b25f2ab2-1fed-11ee-8599-fe02d211784f
  last_name: Arkhipov
citation:
  ama: Arkhipov P. An algorithm for finding the generalized Chebyshev center of sets
    defined via their support functions. <i>Automation and Remote Control</i>. 2024;85(6):522-532.
    doi:<a href="https://doi.org/10.1134/S0005117924060031">10.1134/S0005117924060031</a>
  apa: Arkhipov, P. (2024). An algorithm for finding the generalized Chebyshev center
    of sets defined via their support functions. <i>Automation and Remote Control</i>.
    Springer Nature. <a href="https://doi.org/10.1134/S0005117924060031">https://doi.org/10.1134/S0005117924060031</a>
  chicago: Arkhipov, Pavel. “An Algorithm for Finding the Generalized Chebyshev Center
    of Sets Defined via Their Support Functions.” <i>Automation and Remote Control</i>.
    Springer Nature, 2024. <a href="https://doi.org/10.1134/S0005117924060031">https://doi.org/10.1134/S0005117924060031</a>.
  ieee: P. Arkhipov, “An algorithm for finding the generalized Chebyshev center of
    sets defined via their support functions,” <i>Automation and Remote Control</i>,
    vol. 85, no. 6. Springer Nature, pp. 522–532, 2024.
  ista: Arkhipov P. 2024. An algorithm for finding the generalized Chebyshev center
    of sets defined via their support functions. Automation and Remote Control. 85(6),
    522–532.
  mla: Arkhipov, Pavel. “An Algorithm for Finding the Generalized Chebyshev Center
    of Sets Defined via Their Support Functions.” <i>Automation and Remote Control</i>,
    vol. 85, no. 6, Springer Nature, 2024, pp. 522–32, doi:<a href="https://doi.org/10.1134/S0005117924060031">10.1134/S0005117924060031</a>.
  short: P. Arkhipov, Automation and Remote Control 85 (2024) 522–532.
corr_author: '1'
das_tickbox: '0'
date_created: 2024-10-27T23:01:45Z
date_published: 2024-06-01T00:00:00Z
date_updated: 2026-10-02T11:10:45Z
day: '01'
department:
- _id: GradSch
doi: 10.1134/S0005117924060031
external_id:
  isi:
  - '001338721700007'
fulldoi: https://doi.org/10.1134/S0005117924060031
intvolume: '        85'
isi: 1
issue: '6'
language:
- iso: eng
month: '06'
oa_version: None
page: 522-532
publication: Automation and Remote Control
publication_identifier:
  eissn:
  - 1608-3032
  issn:
  - 0005-1179
publication_status: published
publisher: Springer Nature
quality_controlled: '1'
researchdata_availability: no
scopus_import: '1'
status: public
supplementarymaterial: no
title: An algorithm for finding the generalized Chebyshev center of sets defined via
  their support functions
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 85
year: '2024'
...
---
OA_type: closed access
_id: '18450'
abstract:
- lang: eng
  text: In this work we present the engineering of a portable platform for sensing
    SERS signals in droplets microfluidics. This system comprised not only the read-out
    platform but also a design for the microfluidic devices optimized to enhanced
    the obtained SERS signals.
acknowledgement: The authors acknowledge the financial support of the project HfPT
  – Health from Portugal, with the reference n.° C644937233-00000047, co-funded by
  Component C5 – Capitalisation and Business Innovation under the Portuguese Resilience
  and Recovery Plan, through the NextGenerationEU Fund.
article_processing_charge: No
author:
- first_name: Sergio
  full_name: Quintero, Sergio
  last_name: Quintero
- first_name: Maria
  full_name: Relvas, Maria
  last_name: Relvas
- first_name: Marta
  full_name: Aranda, Marta
  last_name: Aranda
- first_name: Fernando
  full_name: Nodal, Fernando
  id: 8ad43d5a-1ffe-11ee-8b67-8176f59de781
  last_name: Nodal
  orcid: 0009-0006-4119-4376
- first_name: Lorena
  full_name: Dieguez, Lorena
  last_name: Dieguez
- first_name: Sara
  full_name: Abalde-Cela, Sara
  last_name: Abalde-Cela
citation:
  ama: 'Quintero S, Relvas M, Aranda M, Nodal F, Dieguez L, Abalde-Cela S. Portable
    Raman platform for SERS droplets microfludics. In: <i>2024 International Conference
    on Optical MEMS and Nanophotonics</i>. IEEE; 2024. doi:<a href="https://doi.org/10.1109/OMN61224.2024.10685279">10.1109/OMN61224.2024.10685279</a>'
  apa: 'Quintero, S., Relvas, M., Aranda, M., Nodal, F., Dieguez, L., &#38; Abalde-Cela,
    S. (2024). Portable Raman platform for SERS droplets microfludics. In <i>2024
    International Conference on Optical MEMS and Nanophotonics</i>. San Sebastian,
    Spain: IEEE. <a href="https://doi.org/10.1109/OMN61224.2024.10685279">https://doi.org/10.1109/OMN61224.2024.10685279</a>'
  chicago: Quintero, Sergio, Maria Relvas, Marta Aranda, Fernando Nodal, Lorena Dieguez,
    and Sara Abalde-Cela. “Portable Raman Platform for SERS Droplets Microfludics.”
    In <i>2024 International Conference on Optical MEMS and Nanophotonics</i>. IEEE,
    2024. <a href="https://doi.org/10.1109/OMN61224.2024.10685279">https://doi.org/10.1109/OMN61224.2024.10685279</a>.
  ieee: S. Quintero, M. Relvas, M. Aranda, F. Nodal, L. Dieguez, and S. Abalde-Cela,
    “Portable Raman platform for SERS droplets microfludics,” in <i>2024 International
    Conference on Optical MEMS and Nanophotonics</i>, San Sebastian, Spain, 2024.
  ista: 'Quintero S, Relvas M, Aranda M, Nodal F, Dieguez L, Abalde-Cela S. 2024.
    Portable Raman platform for SERS droplets microfludics. 2024 International Conference
    on Optical MEMS and Nanophotonics. OMN: Conference on Optical MEMS and Nanophotonics.'
  mla: Quintero, Sergio, et al. “Portable Raman Platform for SERS Droplets Microfludics.”
    <i>2024 International Conference on Optical MEMS and Nanophotonics</i>, IEEE,
    2024, doi:<a href="https://doi.org/10.1109/OMN61224.2024.10685279">10.1109/OMN61224.2024.10685279</a>.
  short: S. Quintero, M. Relvas, M. Aranda, F. Nodal, L. Dieguez, S. Abalde-Cela,
    in:, 2024 International Conference on Optical MEMS and Nanophotonics, IEEE, 2024.
conference:
  end_date: 2024-08-01
  location: San Sebastian, Spain
  name: 'OMN: Conference on Optical MEMS and Nanophotonics'
  start_date: 2024-07-28
das_tickbox: '0'
date_created: 2024-10-20T22:02:07Z
date_published: 2024-09-27T00:00:00Z
date_updated: 2026-10-02T11:10:28Z
day: '27'
department:
- _id: GradSch
doi: 10.1109/OMN61224.2024.10685279
external_id:
  isi:
  - '001327768000060'
fulldoi: https://doi.org/10.1109/OMN61224.2024.10685279
isi: 1
language:
- iso: eng
month: '09'
oa_version: None
publication: 2024 International Conference on Optical MEMS and Nanophotonics
publication_identifier:
  eissn:
  - 2160-5041
  isbn:
  - '9798350384925'
  issn:
  - 2160-5033
publication_status: published
publisher: IEEE
quality_controlled: '1'
researchdata_availability: no
scopus_import: '1'
status: public
supplementarymaterial: no
title: Portable Raman platform for SERS droplets microfludics
type: conference
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
year: '2024'
...
---
OA_place: publisher
_id: '18588'
abstract:
- lang: eng
  text: "This thesis is an experimental work about two distinct research projects
    that evolved from a single project: non-equilibrium dynamics of an acoustically
    vibrated particle and microfabrication of particles with nano-scale 3D printing.
    The first project explores non equilibrium dynamics of a particle driven by ultrasonic
    vibrations. We design an experimental system consisting of an electromechanical
    vibration scheme to drive the particle’s vibrations and an imaging scheme to track
    its trajectories. We study the trajectories to determine how the particle’s dynamics
    evolve under the driven conditions, considering out of equilibrium systems in
    the context of equilibrium statistical mechanics. Using a Langevin framework and
    the Boltzmann factor, we characterize the particle’s dynamics as complex; the
    particle motion\r\nis not purely diffusive. We extract physical parameters like
    spring constant, effective temperature, damping coefficient and resonance frequency.\r\n\r\nIn
    the second project, we explore and develop techniques in the design and microfabrication
    of particles across scales. Microfabrication involves building structures at the
    micron or submicron scale. These designed miniaturized patterns, objects, or devices
    are useful in biophysics, pharmacology, medical biology, and nanotechnology. We
    specifically apply two-photon polymerization, a form of 3D nano printing. We print
    millimetric particles, characterizing different designs to evaluate and showcase
    the resolution, aspect ratio integrity and print quality of the printing process.
    We also design and fabricate a microsensor to deflect under applicable force of
    order 0.1 pN. We present fundamental concepts needed to design the microsensor,
    showcasing 3D printing at considerably smaller scales down to the µm or below."
acknowledged_ssus:
- _id: NanoFab
- _id: M-Shop
acknowledgement: "I would like to acknowledge Scott Waitukaitis and Jérémie Palacci,
  for their supervision, and their extensive support of my learning. \r\n\r\nFor the
  beautiful characterization images used in this work, I would like to thank Dr. Daniel
  Grober, Samuel Hajek and Felix Pertl.\r\n\r\nThe Palacci group, particularly Malina
  Strugaru and Dan Grober, for their continuous guidance in decoding and following
  my streams of thought.\r\n\r\nTo the Waitukaitis group, for helping me find my footing
  in science, and making me feel at\r\nhome.\r\n\r\nTo the Nanofabrication Facility
  (NFF) at ISTA, for training me in significant aspects of my research. The MIBA Facility,
  and particularly Todor Asenov for consistently picking up the phone for my machining
  and designing needs.\r\n\r\nTo my friends, Mariana, Lenka, Aaron, Rebecca, Eavan
  who provided an ear, wine, and a lot more when I needed to vent, talk through my
  crises as well as experiment. For the walks, for the coffees, for reading through
  my work and providing edits, for dinners to take me out of blocks and binds and
  for cheering me on when it felt insurmountable. \r\n\r\nFinally, I am grateful to
  Griff and Fletcher, whose music helped me through several blocks, especially with
  my writing.\r\n\r\nMy science would not have been possible without the guidance,
  support and contributions of\r\nall these people, and more."
alternative_title:
- ISTA Master's Thesis
article_processing_charge: No
author:
- first_name: Cecelia N
  full_name: Mweka, Cecelia N
  id: 2a69ab4b-896a-11ed-bdf8-cb8641cf2b21
  last_name: Mweka
citation:
  ama: Mweka CN. Non equilibrium dynamics of driven individual particles and 3D printing
    across scales. 2024. doi:<a href="https://doi.org/10.15479/at:ista:18588">10.15479/at:ista:18588</a>
  apa: Mweka, C. N. (2024). <i>Non equilibrium dynamics of driven individual particles
    and 3D printing across scales</i>. Institute of Science and Technology Austria.
    <a href="https://doi.org/10.15479/at:ista:18588">https://doi.org/10.15479/at:ista:18588</a>
  chicago: Mweka, Cecelia N. “Non Equilibrium Dynamics of Driven Individual Particles
    and 3D Printing across Scales.” Institute of Science and Technology Austria, 2024.
    <a href="https://doi.org/10.15479/at:ista:18588">https://doi.org/10.15479/at:ista:18588</a>.
  ieee: C. N. Mweka, “Non equilibrium dynamics of driven individual particles and
    3D printing across scales,” Institute of Science and Technology Austria, 2024.
  ista: Mweka CN. 2024. Non equilibrium dynamics of driven individual particles and
    3D printing across scales. Institute of Science and Technology Austria.
  mla: Mweka, Cecelia N. <i>Non Equilibrium Dynamics of Driven Individual Particles
    and 3D Printing across Scales</i>. Institute of Science and Technology Austria,
    2024, doi:<a href="https://doi.org/10.15479/at:ista:18588">10.15479/at:ista:18588</a>.
  short: C.N. Mweka, Non Equilibrium Dynamics of Driven Individual Particles and 3D
    Printing across Scales, Institute of Science and Technology Austria, 2024.
corr_author: '1'
das_tickbox: '0'
date_created: 2024-11-27T09:12:02Z
date_published: 2024-11-29T00:00:00Z
date_updated: 2026-10-02T11:11:44Z
day: '29'
ddc:
- '530'
degree_awarded: MS
department:
- _id: GradSch
doi: 10.15479/at:ista:18588
doi_confirm: '1'
file:
- access_level: open_access
  checksum: 054ed7a5e5ae6e7220e6bb37ea57a3c3
  content_type: application/pdf
  creator: cmweka
  date_created: 2024-11-28T12:50:32Z
  date_updated: 2024-11-28T12:50:32Z
  file_id: '18597'
  file_name: Cecelia Mweka Master Thesis.pdf
  file_size: 3836671
  relation: main_file
  success: 1
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  checksum: 7d7d9299f090d83e628d65d93116e8c2
  content_type: application/vnd.openxmlformats-officedocument.wordprocessingml.document
  creator: cmweka
  date_created: 2024-11-28T12:51:43Z
  date_updated: 2024-12-13T11:30:53Z
  file_id: '18598'
  file_name: Cecelia Mweka Master Thesis.docx
  file_size: 7068210
  relation: source_file
file_date_updated: 2024-12-13T11:30:53Z
fulldoi: https://doi.org/10.15479/at:ista:18588
has_accepted_license: '1'
language:
- iso: eng
month: '11'
oa: 1
oa_version: Published Version
page: '61'
publication_identifier:
  issn:
  - 2791-4585
publication_status: published
publisher: Institute of Science and Technology Austria
researchdata_availability: no
status: public
supervisor:
- first_name: Scott R
  full_name: Waitukaitis, Scott R
  id: 3A1FFC16-F248-11E8-B48F-1D18A9856A87
  last_name: Waitukaitis
  orcid: 0000-0002-2299-3176
- first_name: Jérémie A
  full_name: Palacci, Jérémie A
  id: 8fb92548-2b22-11eb-b7c1-a3f0d08d7c7d
  last_name: Palacci
  orcid: 0000-0002-7253-9465
supplementarymaterial: no
title: Non equilibrium dynamics of driven individual particles and 3D printing across
  scales
type: dissertation
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
year: '2024'
...
---
_id: '14705'
abstract:
- lang: eng
  text: Since the commercialization of brine shrimp (genus Artemia) in the 1950s,
    this lineage, and in particular the model species Artemia franciscana, has been
    the subject of extensive research. However, our understanding of the genetic mechanisms
    underlying various aspects of their reproductive biology, including sex determination,
    are still lacking. This is partly due to the scarcity of genomic resources for
    Artemia species and crustaceans in general. Here, we present a chromosome-level
    genome assembly of Artemia franciscana (Kellogg 1906), from the Great Salt Lake,
    USA. The genome is 1GB, and the majority of the genome (81%) is scaffolded into
    21 linkage groups using a previously published high-density linkage map. We performed
    coverage and FST analyses using male and female genomic and transcriptomic reads
    to quantify the extent of differentiation between the Z and W chromosomes. Additionally,
    we quantified the expression levels in male and female heads and gonads and found
    further evidence for dosage compensation in this species.
article_processing_charge: No
author:
- first_name: Marwan N
  full_name: Elkrewi, Marwan N
  id: 0B46FACA-A8E1-11E9-9BD3-79D1E5697425
  last_name: Elkrewi
  orcid: 0000-0002-5328-7231
citation:
  ama: Elkrewi MN. Data from “Chromosome-level assembly of Artemia franciscana sheds
    light on sex-chromosome differentiation.” 2024. doi:<a href="https://doi.org/10.15479/AT:ISTA:14705">10.15479/AT:ISTA:14705</a>
  apa: Elkrewi, M. N. (2024). Data from “Chromosome-level assembly of Artemia franciscana
    sheds light on sex-chromosome differentiation.” Institute of Science and Technology
    Austria. <a href="https://doi.org/10.15479/AT:ISTA:14705">https://doi.org/10.15479/AT:ISTA:14705</a>
  chicago: Elkrewi, Marwan N. “Data from ‘Chromosome-Level Assembly of Artemia Franciscana
    Sheds Light on Sex-Chromosome Differentiation.’” Institute of Science and Technology
    Austria, 2024. <a href="https://doi.org/10.15479/AT:ISTA:14705">https://doi.org/10.15479/AT:ISTA:14705</a>.
  ieee: M. N. Elkrewi, “Data from ‘Chromosome-level assembly of Artemia franciscana
    sheds light on sex-chromosome differentiation.’” Institute of Science and Technology
    Austria, 2024.
  ista: Elkrewi MN. 2024. Data from ‘Chromosome-level assembly of Artemia franciscana
    sheds light on sex-chromosome differentiation’, Institute of Science and Technology
    Austria, <a href="https://doi.org/10.15479/AT:ISTA:14705">10.15479/AT:ISTA:14705</a>.
  mla: Elkrewi, Marwan N. <i>Data from “Chromosome-Level Assembly of Artemia Franciscana
    Sheds Light on Sex-Chromosome Differentiation.”</i> Institute of Science and Technology
    Austria, 2024, doi:<a href="https://doi.org/10.15479/AT:ISTA:14705">10.15479/AT:ISTA:14705</a>.
  short: M.N. Elkrewi, (2024).
contributor:
- contributor_type: researcher
  first_name: Vincent K
  id: 57854184-AAE0-11E9-8D04-98D6E5697425
  last_name: Bett
- contributor_type: project_member
  first_name: Ariana
  id: 2A0848E2-F248-11E8-B48F-1D18A9856A87
  last_name: Macon
- contributor_type: supervisor
  first_name: Beatriz
  id: 49E1C5C6-F248-11E8-B48F-1D18A9856A87
  last_name: Vicoso
  orcid: 0000-0002-4579-8306
- contributor_type: researcher
  first_name: Marwan N
  id: 0B46FACA-A8E1-11E9-9BD3-79D1E5697425
  last_name: Elkrewi
  orcid: 0000-0002-5328-7231
corr_author: '1'
date_created: 2023-12-22T13:40:48Z
date_published: 2024-01-02T00:00:00Z
date_updated: 2026-10-02T11:13:43Z
day: '02'
ddc:
- '576'
department:
- _id: GradSch
- _id: BeVi
doi: 10.15479/AT:ISTA:14705
doi_confirm: '1'
file:
- access_level: open_access
  checksum: bdaf1392867786634ec5466d528c36ca
  content_type: text/plain
  creator: melkrewi
  date_created: 2023-12-22T13:54:21Z
  date_updated: 2023-12-22T13:54:21Z
  file_id: '14707'
  file_name: readme.txt.txt
  file_size: 847
  relation: main_file
  success: 1
- access_level: open_access
  checksum: 973e1cbdab923a71709782177980829f
  content_type: application/x-zip-compressed
  creator: melkrewi
  date_created: 2023-12-22T14:14:06Z
  date_updated: 2023-12-22T14:14:06Z
  file_id: '14708'
  file_name: data_artemia_franciscana_genome.zip
  file_size: 343632753
  relation: main_file
  success: 1
file_date_updated: 2023-12-22T14:14:06Z
fulldoi: https://doi.org/10.15479/AT:ISTA:14705
has_accepted_license: '1'
keyword:
- sex chromosome evolution
- genome assembly
- dosage compensation
month: '01'
oa: 1
oa_version: Published Version
project:
- _id: 34ae1506-11ca-11ed-8bc3-c14f4c474396
  grant_number: F8810
  name: The highjacking of meiosis for asexual reproduction
publisher: Institute of Science and Technology Austria
related_material:
  record:
  - id: '15009'
    relation: used_in_publication
    status: public
status: public
title: Data from "Chromosome-level assembly of Artemia franciscana sheds light on
  sex-chromosome differentiation"
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: research_data
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
year: '2024'
...
---
_id: '17214'
abstract:
- lang: eng
  text: 'Current numerical algorithms for simulating friction fall in one of two camps:
    smooth solvers sacrifice the stable treatment of static friction in exchange for
    fast convergence, and non-smooth solvers accurately compute friction at convergence
    rates that are often prohibitive for large graphics applications. We introduce
    a novel bridge between these two ideas that computes static and dynamic friction
    stably and efficiently. Our key idea is to convert the highly constrained non-smooth
    problem into an unconstrained smooth problem using logarithmic barriers that converges
    to the exact solution as accuracy increases. We phrase the problem as an interior
    point primal-dual problem that can be solved efficiently with Newton iteration.
    We observe quadratic convergence despite the non-smooth nature of the original
    problem, and our method is well-suited for large systems of tightly packed objects
    with many contact points. We demonstrate the efficacy of our method with stable
    piles of grains and stacks of objects, complex granular flows, and robust interlocking
    assemblies of rigid bodies.'
acknowledgement: We thank Vincent Acary for his help with Siconos, as well as the
  anonymous reviewers and the members of the Visual Computing Group at ISTA for their
  helpful comments. This research was funded in part by the European Union (ERC-2021-COG
  101045083 CoDiNA).
article_processing_charge: Yes (via OA deal)
author:
- first_name: Yi-Lu
  full_name: Chen, Yi-Lu
  id: 0b467602-dbcd-11ea-9d1d-ed480aa46b70
  last_name: Chen
  orcid: 0009-0005-0723-0655
- first_name: Mickaël
  full_name: Ly, Mickaël
  id: 6340d7f0-b48d-11eb-b10d-b7487e71d9f1
  last_name: Ly
- first_name: Christopher J
  full_name: Wojtan, Christopher J
  id: 3C61F1D2-F248-11E8-B48F-1D18A9856A87
  last_name: Wojtan
  orcid: 0000-0001-6646-5546
citation:
  ama: 'Chen Y-L, Ly M, Wojtan C. Primal-dual non-smooth friction for rigid body animation.
    In: <i>Special Interest Group on Computer Graphics and Interactive Techniques
    Conference Conference Papers ’24</i>. Association for Computing Machinery; 2024.
    doi:<a href="https://doi.org/10.1145/3641519.3657485">10.1145/3641519.3657485</a>'
  apa: 'Chen, Y.-L., Ly, M., &#38; Wojtan, C. (2024). Primal-dual non-smooth friction
    for rigid body animation. In <i>Special Interest Group on Computer Graphics and
    Interactive Techniques Conference Conference Papers ’24</i>. Denver, United States:
    Association for Computing Machinery. <a href="https://doi.org/10.1145/3641519.3657485">https://doi.org/10.1145/3641519.3657485</a>'
  chicago: Chen, Yi-Lu, Mickaël Ly, and Chris Wojtan. “Primal-Dual Non-Smooth Friction
    for Rigid Body Animation.” In <i>Special Interest Group on Computer Graphics and
    Interactive Techniques Conference Conference Papers ’24</i>. Association for Computing
    Machinery, 2024. <a href="https://doi.org/10.1145/3641519.3657485">https://doi.org/10.1145/3641519.3657485</a>.
  ieee: Y.-L. Chen, M. Ly, and C. Wojtan, “Primal-dual non-smooth friction for rigid
    body animation,” in <i>Special Interest Group on Computer Graphics and Interactive
    Techniques Conference Conference Papers ’24</i>, Denver, United States, 2024.
  ista: 'Chen Y-L, Ly M, Wojtan C. 2024. Primal-dual non-smooth friction for rigid
    body animation. Special Interest Group on Computer Graphics and Interactive Techniques
    Conference Conference Papers ’24. SIGGRAPH: Computer Graphics and Interactive
    Techniques Conference.'
  mla: Chen, Yi-Lu, et al. “Primal-Dual Non-Smooth Friction for Rigid Body Animation.”
    <i>Special Interest Group on Computer Graphics and Interactive Techniques Conference
    Conference Papers ’24</i>, Association for Computing Machinery, 2024, doi:<a href="https://doi.org/10.1145/3641519.3657485">10.1145/3641519.3657485</a>.
  short: Y.-L. Chen, M. Ly, C. Wojtan, in:, Special Interest Group on Computer Graphics
    and Interactive Techniques Conference Conference Papers ’24, Association for Computing
    Machinery, 2024.
conference:
  end_date: 2024-08-01
  location: Denver, United States
  name: 'SIGGRAPH: Computer Graphics and Interactive Techniques Conference'
  start_date: 2024-07-28
corr_author: '1'
das_tickbox: '0'
date_created: 2024-07-10T11:06:20Z
date_published: 2024-07-01T00:00:00Z
date_updated: 2026-10-02T11:16:26Z
day: '01'
ddc:
- '621'
- '531'
- '006'
department:
- _id: GradSch
- _id: ChWo
doi: 10.1145/3641519.3657485
external_id:
  isi:
  - '001282218200091'
file:
- access_level: open_access
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  file_size: 47309472
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  success: 1
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  content_type: application/pdf
  creator: yichen
  date_created: 2024-07-10T11:03:12Z
  date_updated: 2024-07-10T11:03:12Z
  file_id: '17216'
  file_name: sig24_friction_supplementary.pdf
  file_size: 10518286
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  success: 1
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  checksum: 7123deed34a5456810e7b5336a31c657
  content_type: video/mp4
  creator: yichen
  date_created: 2024-07-10T11:03:51Z
  date_updated: 2024-07-10T11:03:51Z
  file_id: '17217'
  file_name: friction_paper_extra_video_finished.mp4
  file_size: 71789192
  relation: main_file
  success: 1
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  content_type: video/mp4
  creator: yichen
  date_created: 2024-07-10T11:03:58Z
  date_updated: 2024-07-10T11:03:58Z
  file_id: '17218'
  file_name: friction_paper_video_finished.mp4
  file_size: 280610763
  relation: main_file
  success: 1
file_date_updated: 2024-07-10T11:03:58Z
fulldoi: https://doi.org/10.1145/3641519.3657485
has_accepted_license: '1'
isi: 1
keyword:
- physical simulation
- frictional contact
- rigid body mechanics
- non-smooth dynamics
language:
- iso: eng
month: '07'
oa: 1
oa_version: Published Version
project:
- _id: 34bc2376-11ca-11ed-8bc3-9a3b3961a088
  grant_number: '101045083'
  name: Computational Discovery of Numerical Algorithms for Animation and Simulation
    of Natural Phenomena
publication: Special Interest Group on Computer Graphics and Interactive Techniques
  Conference Conference Papers '24
publication_identifier:
  isbn:
  - '9798400705250'
publication_status: published
publisher: Association for Computing Machinery
quality_controlled: '1'
researchdata_availability: no
scopus_import: '1'
status: public
supplementarymaterial: yes
title: Primal-dual non-smooth friction for rigid body animation
type: conference
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
year: '2024'
...
---
OA_place: repository
OA_type: green
_id: '17426'
abstract:
- lang: eng
  text: "The robustness of neural networks against input perturbations with bounded\r\nmagnitude
    represents a serious concern in the deployment of deep learning\r\nmodels in safety-critical
    systems. Recently, the scientific community has\r\nfocused on enhancing certifiable
    robustness guarantees by crafting 1-Lipschitz\r\nneural networks that leverage
    Lipschitz bounded dense and convolutional layers.\r\nAlthough different methods
    have been proposed in the literature to achieve this\r\ngoal, understanding the
    performance of such methods is not straightforward,\r\nsince different metrics
    can be relevant (e.g., training time, memory usage,\r\naccuracy, certifiable robustness)
    for different applications. For this reason,\r\nthis work provides a thorough
    theoretical and empirical comparison between\r\nmethods by evaluating them in
    terms of memory usage, speed, and certifiable\r\nrobust accuracy. The paper also
    provides some guidelines and recommendations to\r\nsupport the user in selecting
    the methods that work best depending on the\r\navailable resources. We provide
    code at\r\nhttps://github.com/berndprach/1LipschitzLayersCompared."
acknowledgement: "This work was partially supported by project SERICS (PE00000014)
  under the MUR National Recovery and Resilience Plan funded by the European Union
  - NextGenerationEU.\r\n"
article_processing_charge: No
arxiv: 1
author:
- first_name: Bernd
  full_name: Prach, Bernd
  id: 2D561D42-C427-11E9-89B4-9C1AE6697425
  last_name: Prach
- first_name: Fabio
  full_name: Brau, Fabio
  last_name: Brau
- first_name: Giorgio
  full_name: Buttazzo, Giorgio
  last_name: Buttazzo
- first_name: Christoph
  full_name: Lampert, Christoph
  id: 40C20FD2-F248-11E8-B48F-1D18A9856A87
  last_name: Lampert
  orcid: 0000-0001-8622-7887
citation:
  ama: 'Prach B, Brau F, Buttazzo G, Lampert C. 1-Lipschitz layers compared: Memory,
    speed, and certifiable robustness. In: <i>Proceedings of the IEEE/CVF Conference
    on Computer Vision and Pattern Recognition</i>. Computer Vision Foundation; 2024:24574-24583.
    doi:<a href="https://doi.org/10.1109/CVPR52733.2024.02320">10.1109/CVPR52733.2024.02320</a>'
  apa: 'Prach, B., Brau, F., Buttazzo, G., &#38; Lampert, C. (2024). 1-Lipschitz layers
    compared: Memory, speed, and certifiable robustness. In <i>Proceedings of the
    IEEE/CVF Conference on Computer Vision and Pattern Recognition</i> (pp. 24574–24583).
    Seattle, WA, United States: Computer Vision Foundation. <a href="https://doi.org/10.1109/CVPR52733.2024.02320">https://doi.org/10.1109/CVPR52733.2024.02320</a>'
  chicago: 'Prach, Bernd, Fabio Brau, Giorgio Buttazzo, and Christoph Lampert. “1-Lipschitz
    Layers Compared: Memory, Speed, and Certifiable Robustness.” In <i>Proceedings
    of the IEEE/CVF Conference on Computer Vision and Pattern Recognition</i>, 24574–83.
    Computer Vision Foundation, 2024. <a href="https://doi.org/10.1109/CVPR52733.2024.02320">https://doi.org/10.1109/CVPR52733.2024.02320</a>.'
  ieee: 'B. Prach, F. Brau, G. Buttazzo, and C. Lampert, “1-Lipschitz layers compared:
    Memory, speed, and certifiable robustness,” in <i>Proceedings of the IEEE/CVF
    Conference on Computer Vision and Pattern Recognition</i>, Seattle, WA, United
    States, 2024, pp. 24574–24583.'
  ista: 'Prach B, Brau F, Buttazzo G, Lampert C. 2024. 1-Lipschitz layers compared:
    Memory, speed, and certifiable robustness. Proceedings of the IEEE/CVF Conference
    on Computer Vision and Pattern Recognition. CVPR: Conference on Computer Vision
    and Pattern Recognition, 24574–24583.'
  mla: 'Prach, Bernd, et al. “1-Lipschitz Layers Compared: Memory, Speed, and Certifiable
    Robustness.” <i>Proceedings of the IEEE/CVF Conference on Computer Vision and
    Pattern Recognition</i>, Computer Vision Foundation, 2024, pp. 24574–83, doi:<a
    href="https://doi.org/10.1109/CVPR52733.2024.02320">10.1109/CVPR52733.2024.02320</a>.'
  short: B. Prach, F. Brau, G. Buttazzo, C. Lampert, in:, Proceedings of the IEEE/CVF
    Conference on Computer Vision and Pattern Recognition, Computer Vision Foundation,
    2024, pp. 24574–24583.
conference:
  end_date: 2024-06-22
  location: Seattle, WA, United States
  name: 'CVPR: Conference on Computer Vision and Pattern Recognition'
  start_date: 2024-06-16
corr_author: '1'
das_tickbox: '0'
date_created: 2024-08-14T08:42:32Z
date_published: 2024-06-01T00:00:00Z
date_updated: 2026-10-02T11:16:04Z
day: '01'
department:
- _id: GradSch
- _id: ChLa
doi: 10.1109/CVPR52733.2024.02320
external_id:
  arxiv:
  - '2311.16833'
  isi:
  - '001344387500055'
fulldoi: https://doi.org/10.1109/CVPR52733.2024.02320
has_accepted_license: '1'
isi: 1
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://doi.org/10.48550/arXiv.2311.16833
month: '06'
oa: 1
oa_version: Preprint
page: 24574-24583
publication: Proceedings of the IEEE/CVF Conference on Computer Vision and Pattern
  Recognition
publication_status: published
publisher: Computer Vision Foundation
quality_controlled: '1'
related_material:
  link:
  - relation: software
    url: https://github.com/berndprach/1LipschitzLayersCompared
  record:
  - id: '19759'
    relation: dissertation_contains
    status: public
researchdata_availability: no
status: public
supplementarymaterial: no
title: '1-Lipschitz layers compared: Memory, speed, and certifiable robustness'
type: conference
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
year: '2024'
...
---
OA_place: repository
_id: '18874'
abstract:
- lang: eng
  text: "Despite extensive research since the community learned about adversarial\r\nexamples
    10 years ago, we still do not know how to train high-accuracy\r\nclassifiers that
    are guaranteed to be robust to small perturbations of their\r\ninputs. Previous
    works often argued that this might be because no classifier\r\nexists that is
    robust and accurate at the same time. However, in computer\r\nvision this assumption
    does not match reality where humans are usually accurate\r\nand robust on most
    tasks of interest. We offer an alternative explanation and\r\nshow that in certain
    settings robust generalization is only possible with\r\nunrealistically large
    amounts of data. More precisely we find a setting where a\r\nrobust classifier
    exists, it is easy to learn an accurate classifier, yet it\r\nrequires an exponential
    amount of data to learn a robust classifier. Based on\r\nthis theoretical result,
    we explore how well robust classifiers generalize on\r\ndatasets such as CIFAR-10.
    We come to the conclusion that on this datasets, the\r\nlimitation of current
    robust models also lies in the generalization, and that\r\nthey require a lot
    of data to do well on the test set. We also show that the\r\nproblem is not in
    the expressiveness or generalization capabilities of current\r\narchitectures,
    and that there are low magnitude features in the data which are\r\nuseful for
    non-robust generalization but are not available for robust\r\nclassifiers."
article_number: '2412.04245'
article_processing_charge: No
arxiv: 1
author:
- first_name: Bernd
  full_name: Prach, Bernd
  id: 2D561D42-C427-11E9-89B4-9C1AE6697425
  last_name: Prach
- first_name: Christoph
  full_name: Lampert, Christoph
  id: 40C20FD2-F248-11E8-B48F-1D18A9856A87
  last_name: Lampert
  orcid: 0000-0001-8622-7887
citation:
  ama: Prach B, Lampert C. Intriguing properties of robust classification. <i>arXiv</i>.
    doi:<a href="https://doi.org/10.48550/arXiv.2412.04245">10.48550/arXiv.2412.04245</a>
  apa: Prach, B., &#38; Lampert, C. (n.d.). Intriguing properties of robust classification.
    <i>arXiv</i>. <a href="https://doi.org/10.48550/arXiv.2412.04245">https://doi.org/10.48550/arXiv.2412.04245</a>
  chicago: Prach, Bernd, and Christoph Lampert. “Intriguing Properties of Robust Classification.”
    <i>ArXiv</i>, n.d. <a href="https://doi.org/10.48550/arXiv.2412.04245">https://doi.org/10.48550/arXiv.2412.04245</a>.
  ieee: B. Prach and C. Lampert, “Intriguing properties of robust classification,”
    <i>arXiv</i>. .
  ista: Prach B, Lampert C. Intriguing properties of robust classification. arXiv,
    2412.04245.
  mla: Prach, Bernd, and Christoph Lampert. “Intriguing Properties of Robust Classification.”
    <i>ArXiv</i>, 2412.04245, doi:<a href="https://doi.org/10.48550/arXiv.2412.04245">10.48550/arXiv.2412.04245</a>.
  short: B. Prach, C. Lampert, ArXiv (n.d.).
corr_author: '1'
das_tickbox: '0'
date_created: 2025-01-24T16:57:29Z
date_published: 2024-12-05T00:00:00Z
date_updated: 2026-10-02T11:15:43Z
day: '05'
department:
- _id: GradSch
- _id: ChLa
doi: 10.48550/arXiv.2412.04245
external_id:
  arxiv:
  - '2412.04245'
fulldoi: https://doi.org/10.48550/arXiv.2412.04245
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://doi.org/10.48550/arXiv.2412.04245
month: '12'
oa: 1
oa_version: Preprint
publication: arXiv
publication_status: draft
related_material:
  record:
  - id: '20455'
    relation: later_version
    status: public
  - id: '19759'
    relation: dissertation_contains
    status: public
researchdata_availability: no
status: public
supplementarymaterial: yes
title: Intriguing properties of robust classification
type: preprint
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
year: '2024'
...
---
OA_place: repository
_id: '17361'
abstract:
- lang: eng
  text: We present symplectic structures on the shape space of unparameterized space
    curves that generalize the classical Marsden-Weinstein structure. Our method integrates
    the Liouville 1-form of the Marsden-Weinstein structure with Riemannian structures
    that have been introduced in mathematical shape analysis. We also derive Hamiltonian
    vector fields for several classical Hamiltonian functions with respect to these
    new symplectic structures.
acknowledgement: The authors are grateful to Boris Khesin for valuable comments on
  the MW symplectic structure and S. Ishida thanks Albert Chern for insightful discussions
  on space curves and Chris Wojtan for his continuous support. M. Bauer was partially
  supported by NSF grant DMS-1953244 and by the Binational Science Foundation (BSF).
  S. Ishida was partially supported by ERC Consolidator Grant 101045083 “CoDiNA” funded
  by the European Research Council. Some figures were generated by the software Houdini
  and its education license was provided by SideFX.
article_processing_charge: No
arxiv: 1
author:
- first_name: Martin
  full_name: Bauer, Martin
  last_name: Bauer
- first_name: Sadashige
  full_name: Ishida, Sadashige
  id: 6F7C4B96-A8E9-11E9-A7CA-09ECE5697425
  last_name: Ishida
  orcid: 0000-0002-3121-3100
- first_name: Peter W.
  full_name: Michor, Peter W.
  last_name: Michor
citation:
  ama: Bauer M, Ishida S, Michor PW. Symplectic structures on the space of space curves.
    <i>arXiv</i>. doi:<a href="https://doi.org/10.48550/arXiv.2407.19908">10.48550/arXiv.2407.19908</a>
  apa: Bauer, M., Ishida, S., &#38; Michor, P. W. (n.d.). Symplectic structures on
    the space of space curves. <i>arXiv</i>. <a href="https://doi.org/10.48550/arXiv.2407.19908">https://doi.org/10.48550/arXiv.2407.19908</a>
  chicago: Bauer, Martin, Sadashige Ishida, and Peter W. Michor. “Symplectic Structures
    on the Space of Space Curves.” <i>ArXiv</i>, n.d. <a href="https://doi.org/10.48550/arXiv.2407.19908">https://doi.org/10.48550/arXiv.2407.19908</a>.
  ieee: M. Bauer, S. Ishida, and P. W. Michor, “Symplectic structures on the space
    of space curves,” <i>arXiv</i>. .
  ista: Bauer M, Ishida S, Michor PW. Symplectic structures on the space of space
    curves. arXiv, <a href="https://doi.org/10.48550/arXiv.2407.19908">10.48550/arXiv.2407.19908</a>.
  mla: Bauer, Martin, et al. “Symplectic Structures on the Space of Space Curves.”
    <i>ArXiv</i>, doi:<a href="https://doi.org/10.48550/arXiv.2407.19908">10.48550/arXiv.2407.19908</a>.
  short: M. Bauer, S. Ishida, P.W. Michor, ArXiv (n.d.).
das_tickbox: '0'
date_created: 2024-08-01T06:34:08Z
date_published: 2024-07-29T00:00:00Z
date_updated: 2026-10-02T11:16:46Z
day: '29'
department:
- _id: GradSch
- _id: ChWo
doi: 10.48550/arXiv.2407.19908
external_id:
  arxiv:
  - '2407.19908'
fulldoi: https://doi.org/10.48550/arXiv.2407.19908
keyword:
- space of space curves
- symplectic stuctures
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://doi.org/10.48550/arXiv.2407.19908
month: '07'
oa: 1
oa_version: Preprint
project:
- _id: 34bc2376-11ca-11ed-8bc3-9a3b3961a088
  grant_number: '101045083'
  name: Computational Discovery of Numerical Algorithms for Animation and Simulation
    of Natural Phenomena
publication: arXiv
publication_status: draft
related_material:
  record:
  - id: '20551'
    relation: dissertation_contains
    status: public
  - id: '21743'
    relation: later_version
    status: public
researchdata_availability: no
status: public
supplementarymaterial: no
title: Symplectic structures on the space of space curves
type: preprint
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
year: '2024'
...
---
OA_place: publisher
OA_type: hybrid
_id: '17219'
abstract:
- lang: eng
  text: 'We introduce a multi-material non-manifold mesh-based surface tracking algorithm
    that converts self-intersections into topological changes. Our algorithm generalizes
    prior work on manifold surface tracking with topological changes: it preserves
    surface features like mesh-based methods, and it robustly handles topological
    changes like level set methods. Our method also offers improved efficiency and
    robustness over the state of the art. We demonstrate the effectiveness of the
    approach on a range of examples, including complex soap film simulations with
    thousands of interacting bubbles, and boolean unions of non-manifold meshes consisting
    of millions of triangles.'
acknowledgement: Peter Heiss-Synak helped conceive the project, helped formulate the
  algorithm structure, contributed ideas and code to Sections 6 & 8, the mesh data
  structure, algorithm robustness and benchmarks, helped write the paper, and provided
  supervision and conceptual solutions throughout the project. Aleksei Kalinov contributed
  ideas and code to Sections 7, 8.5, and 5, the sparse grid data structure, algorithm
  robustness and benchmarks, optimized the performance, produced all results, most
  figures, and the supplementary video, helped write the text, and provided conceptual
  solutions throughout the project. Malina Strugaru helped implement the mesh data
  structure and designed re-meshing operations for non-manifold triangle meshes. Arian
  Etemadi developed early prototypes for ideas in Sections 8.1 and 8.3 and helped
  write the paper. Huidong Yang developed early prototypes for isosurface extraction
  and visualization. Chris Wojtan helped conceive the project, helped write the paper,
  and provided supervision, prototype grid data structure code, and conceptual solutions
  throughout the project. We thank the anonymous reviewers for their helpful comments,
  the members of the Visual Computing Group at ISTA for their feedback, Christopher
  Batty for discussions about LosTopos, and SideFX for the Houdini Education software
  licenses.  This research was funded in part by the European Union (ERC-2021-COG
  101045083 CoDiNA).
article_number: '54'
article_processing_charge: Yes (via OA deal)
article_type: original
author:
- first_name: Peter
  full_name: Synak, Peter
  id: 331776E2-F248-11E8-B48F-1D18A9856A87
  last_name: Synak
- first_name: Aleksei
  full_name: Kalinov, Aleksei
  id: 44b7120e-eb97-11eb-a6c2-e1557aa81d02
  last_name: Kalinov
  orcid: 0000-0003-2189-3904
- first_name: Irina-Malina
  full_name: Strugaru, Irina-Malina
  id: 2afc607f-f128-11eb-9611-8f2a0dfcf074
  last_name: Strugaru
- first_name: Arian
  full_name: Etemadihaghighi, Arian
  id: 36cea3aa-f38e-11ec-8ae0-c65ae6f6098f
  last_name: Etemadihaghighi
- first_name: Huidong
  full_name: Yang, Huidong
  last_name: Yang
- first_name: Christopher J
  full_name: Wojtan, Christopher J
  id: 3C61F1D2-F248-11E8-B48F-1D18A9856A87
  last_name: Wojtan
  orcid: 0000-0001-6646-5546
citation:
  ama: Synak P, Kalinov A, Strugaru I-M, Etemadi A, Yang H, Wojtan C. Multi-material
    mesh-based surface tracking with implicit topology changes. <i>ACM Transactions
    on Graphics</i>. 2024;43(4). doi:<a href="https://doi.org/10.1145/3658223">10.1145/3658223</a>
  apa: Synak, P., Kalinov, A., Strugaru, I.-M., Etemadi, A., Yang, H., &#38; Wojtan,
    C. (2024). Multi-material mesh-based surface tracking with implicit topology changes.
    <i>ACM Transactions on Graphics</i>. Association for Computing Machinery. <a href="https://doi.org/10.1145/3658223">https://doi.org/10.1145/3658223</a>
  chicago: Synak, Peter, Aleksei Kalinov, Irina-Malina Strugaru, Arian Etemadi, Huidong
    Yang, and Chris Wojtan. “Multi-Material Mesh-Based Surface Tracking with Implicit
    Topology Changes.” <i>ACM Transactions on Graphics</i>. Association for Computing
    Machinery, 2024. <a href="https://doi.org/10.1145/3658223">https://doi.org/10.1145/3658223</a>.
  ieee: P. Synak, A. Kalinov, I.-M. Strugaru, A. Etemadi, H. Yang, and C. Wojtan,
    “Multi-material mesh-based surface tracking with implicit topology changes,” <i>ACM
    Transactions on Graphics</i>, vol. 43, no. 4. Association for Computing Machinery,
    2024.
  ista: Synak P, Kalinov A, Strugaru I-M, Etemadi A, Yang H, Wojtan C. 2024. Multi-material
    mesh-based surface tracking with implicit topology changes. ACM Transactions on
    Graphics. 43(4), 54.
  mla: Synak, Peter, et al. “Multi-Material Mesh-Based Surface Tracking with Implicit
    Topology Changes.” <i>ACM Transactions on Graphics</i>, vol. 43, no. 4, 54, Association
    for Computing Machinery, 2024, doi:<a href="https://doi.org/10.1145/3658223">10.1145/3658223</a>.
  short: P. Synak, A. Kalinov, I.-M. Strugaru, A. Etemadi, H. Yang, C. Wojtan, ACM
    Transactions on Graphics 43 (2024).
corr_author: '1'
das_tickbox: '0'
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has_accepted_license: '1'
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issue: '4'
keyword:
- surface tracking
- topology change
- non- manifold meshes
- multi-material flows
- solid modeling
language:
- iso: eng
license: https://creativecommons.org/licenses/by-nc-sa/4.0/
month: '07'
oa: 1
oa_version: Published Version
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publication: ACM Transactions on Graphics
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  issn:
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publication_status: published
publisher: Association for Computing Machinery
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abstract:
- lang: eng
  text: Physics simulation in computer graphics can bring triangle meshes into topologically
    invalid states. The method in this thesis contributed to Heiss-Synak* and Kalinov*
    et al. [2024] who devised a non-manifold hybrid surface tracker—a surface tracker
    that repairs explicit non-manifold triangle meshes with the help of the implicit
    domain. Specifically, this thesis provides an algorithm for filling the holes
    that are left after removing problematic parts of the mesh.
alternative_title:
- ISTA Master's Thesis
article_processing_charge: No
author:
- first_name: Arian
  full_name: Etemadihaghighi, Arian
  id: 36cea3aa-f38e-11ec-8ae0-c65ae6f6098f
  last_name: Etemadihaghighi
citation:
  ama: Etemadi A. Filling the holes of non-manifold self-intersecting meshes for implicit
    topology changes in surface tracking. 2024. doi:<a href="https://doi.org/10.15479/at:ista:18301">10.15479/at:ista:18301</a>
  apa: Etemadi, A. (2024). <i>Filling the holes of non-manifold self-intersecting
    meshes for implicit topology changes in surface tracking</i>. Institute of Science
    and Technology Austria. <a href="https://doi.org/10.15479/at:ista:18301">https://doi.org/10.15479/at:ista:18301</a>
  chicago: Etemadi, Arian. “Filling the Holes of Non-Manifold Self-Intersecting Meshes
    for Implicit Topology Changes in Surface Tracking.” Institute of Science and Technology
    Austria, 2024. <a href="https://doi.org/10.15479/at:ista:18301">https://doi.org/10.15479/at:ista:18301</a>.
  ieee: A. Etemadi, “Filling the holes of non-manifold self-intersecting meshes for
    implicit topology changes in surface tracking,” Institute of Science and Technology
    Austria, 2024.
  ista: Etemadi A. 2024. Filling the holes of non-manifold self-intersecting meshes
    for implicit topology changes in surface tracking. Institute of Science and Technology
    Austria.
  mla: Etemadi, Arian. <i>Filling the Holes of Non-Manifold Self-Intersecting Meshes
    for Implicit Topology Changes in Surface Tracking</i>. Institute of Science and
    Technology Austria, 2024, doi:<a href="https://doi.org/10.15479/at:ista:18301">10.15479/at:ista:18301</a>.
  short: A. Etemadi, Filling the Holes of Non-Manifold Self-Intersecting Meshes for
    Implicit Topology Changes in Surface Tracking, Institute of Science and Technology
    Austria, 2024.
corr_author: '1'
das_tickbox: '0'
date_created: 2024-10-11T19:52:20Z
date_published: 2024-10-15T00:00:00Z
date_updated: 2026-10-02T11:19:26Z
day: '15'
ddc:
- '000'
degree_awarded: MS
department:
- _id: GradSch
- _id: ChWo
doi: 10.15479/at:ista:18301
doi_confirm: '1'
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fulldoi: https://doi.org/10.15479/at:ista:18301
has_accepted_license: '1'
keyword:
- surface tracking
- non-manifold
- hole-filling
- topology change
- multi-material
- solid-modeling
language:
- iso: eng
license: https://creativecommons.org/licenses/by-sa/4.0/
month: '10'
oa: 1
oa_version: Published Version
page: '39'
publication_identifier:
  issn:
  - 2791-4585
publication_status: published
publisher: Institute of Science and Technology Austria
related_material:
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    status: public
researchdata_availability: no
status: public
supervisor:
- first_name: Christopher J
  full_name: Wojtan, Christopher J
  id: 3C61F1D2-F248-11E8-B48F-1D18A9856A87
  last_name: Wojtan
  orcid: 0000-0001-6646-5546
supplementarymaterial: no
title: Filling the holes of non-manifold self-intersecting meshes for implicit topology
  changes in surface tracking
tmp:
  image: /images/cc_by_sa.png
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  short: CC BY-SA (4.0)
type: dissertation
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
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...
---
OA_place: repository
OA_type: green
_id: '12846'
abstract:
- lang: eng
  text: We present a formula for the signed area of a spherical polygon via prequantization.
    In contrast to the traditional formula based on the Gauss-Bonnet theorem that
    requires measuring angles, the new formula mimics Green's theorem and is applicable
    to a wider range of degenerate spherical curves and polygons.
acknowledgement: This work was funded by European Research Council Consolidator grant
  101045083 CoDiNA and National Science Foundation CAREER award 2239062. Some figures
  in the article were generated by the software Houdini and its education license
  was provided by SideFX. The authors acknowledge anonymous referees for their reviews
  and insightful suggestions, and Chris Wojtan for his continuous support through
  discussions. The second author thanks Anna Sisak for a fruitful discussion on prequantum
  bundles.
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Albert
  full_name: Chern, Albert
  last_name: Chern
- first_name: Sadashige
  full_name: Ishida, Sadashige
  id: 6F7C4B96-A8E9-11E9-A7CA-09ECE5697425
  last_name: Ishida
  orcid: 0000-0002-3121-3100
citation:
  ama: Chern A, Ishida S. Area formula for spherical polygons via prequantization.
    <i>SIAM Journal on Applied Algebra and Geometry</i>. 2024;8(3):782-796. doi:<a
    href="https://doi.org/10.1137/23M1565255">10.1137/23M1565255</a>
  apa: Chern, A., &#38; Ishida, S. (2024). Area formula for spherical polygons via
    prequantization. <i>SIAM Journal on Applied Algebra and Geometry</i>. Society
    for Industrial and Applied Mathematics. <a href="https://doi.org/10.1137/23M1565255">https://doi.org/10.1137/23M1565255</a>
  chicago: Chern, Albert, and Sadashige Ishida. “Area Formula for Spherical Polygons
    via Prequantization.” <i>SIAM Journal on Applied Algebra and Geometry</i>. Society
    for Industrial and Applied Mathematics, 2024. <a href="https://doi.org/10.1137/23M1565255">https://doi.org/10.1137/23M1565255</a>.
  ieee: A. Chern and S. Ishida, “Area formula for spherical polygons via prequantization,”
    <i>SIAM Journal on Applied Algebra and Geometry</i>, vol. 8, no. 3. Society for
    Industrial and Applied Mathematics, pp. 782–796, 2024.
  ista: Chern A, Ishida S. 2024. Area formula for spherical polygons via prequantization.
    SIAM Journal on Applied Algebra and Geometry. 8(3), 782–796.
  mla: Chern, Albert, and Sadashige Ishida. “Area Formula for Spherical Polygons via
    Prequantization.” <i>SIAM Journal on Applied Algebra and Geometry</i>, vol. 8,
    no. 3, Society for Industrial and Applied Mathematics, 2024, pp. 782–96, doi:<a
    href="https://doi.org/10.1137/23M1565255">10.1137/23M1565255</a>.
  short: A. Chern, S. Ishida, SIAM Journal on Applied Algebra and Geometry 8 (2024)
    782–796.
corr_author: '1'
das_tickbox: '0'
date_created: 2023-04-18T19:16:06Z
date_published: 2024-09-23T00:00:00Z
date_updated: 2026-10-02T11:17:04Z
day: '23'
ddc:
- '516'
department:
- _id: GradSch
- _id: ChWo
doi: 10.1137/23M1565255
external_id:
  arxiv:
  - '2303.14555'
  isi:
  - '001342265800009'
fulldoi: https://doi.org/10.1137/23M1565255
has_accepted_license: '1'
intvolume: '         8'
isi: 1
issue: '3'
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://doi.org/10.48550/arXiv.2303.14555
month: '09'
oa: 1
oa_version: Preprint
page: 782-796
project:
- _id: 34bc2376-11ca-11ed-8bc3-9a3b3961a088
  grant_number: '101045083'
  name: Computational Discovery of Numerical Algorithms for Animation and Simulation
    of Natural Phenomena
publication: SIAM Journal on Applied Algebra and Geometry
publication_identifier:
  eissn:
  - 2470-6566
publication_status: published
publisher: Society for Industrial and Applied Mathematics
quality_controlled: '1'
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    status: public
researchdata_availability: no
scopus_import: '1'
status: public
supplementarymaterial: no
title: Area formula for spherical polygons via prequantization
tmp:
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  legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
  name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
  short: CC BY (4.0)
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 8
year: '2024'
...
---
OA_place: publisher
_id: '17485'
abstract:
- lang: eng
  text: "Large language models (LLMs) have made tremendous progress in the past few
    years, from being able to generate coherent text to matching or surpassing humans
    in a wide variety of creative, knowledge or reasoning tasks. Much of this can
    be attributed to massively increased scale, both in the size of the model as well
    as the amount of training data, from 100s of millions to 100s of billions, or
    even trillions. This trend is expected to continue, which, although exciting,
    also raises major practical concerns. Already today's 100+ billion parameter LLMs
    require top-of-the-line hardware just to run. Hence, it is clear that sustaining
    these developments will require significant efficiency advances.\r\n\r\nHistorically,
    one of the most practical ways of improving model efficiency has been compression,
    especially in the form of sparsity or quantization. While this has been studied
    extensively in the past, existing accurate methods are all designed for models
    around 100 million parameters; scaling them up to ones literally 1000x larger
    is highly challenging. In this thesis, we introduce a new unified sparsification
    and quantization approach OBC, which through additional algorithmic enhancements
    leads to GPTQ and SparseGPT, the first techniques fast and accurate enough to
    compress 100+ billion parameter models to 4- or even 3-bit precision and 50% weight-sparsity,
    respectively. Additionally, we show how weight-only quantizion does not just bring
    space savings but also up to 4.5x faster generation speed, via custom GPU kernels.\r\n\r\nIn
    fact, we show for the first time that it is possible to develop an FP16 times
    INT4 mixed-precision matrix multiplication kernel, called Marlin, which comes
    close to simultaneously maximizing both memory and compute utilization, making
    weight-only quantization highly practical even for multi-user serving. Further,
    we demonstrate that GPTQ can be scaled to widely overparametrized trillion-parameter
    models, where extreme sub-1-bit compression rates can be achieved without any
    inference slow-down, by co-designing a bespoke entropy coding scheme together
    with an efficient kernel.\r\n\r\nFinally, we also study compression from the perspective
    of someone with access to massive amounts of compute resources for training large
    models completely from scratch. Here the key questions evolve around the joint
    scaling behavior between compression, model size, and amount of training data
    used. Based on extensive experimental results for both vision and text models,
    we introduce the first scaling law which accurately captures the relationship
    between weight-sparsity, number of non-zero weights and data. This further allows
    us to characterize the optimal sparsity, which we find to increase the longer
    a fixed cost model is being trained.\r\n\r\nOverall, this thesis presents contributions
    to three different angles of large model efficiency: affordable but accurate algorithms,
    highly efficient systems implementations, and fundamental scaling laws for compressed
    training."
acknowledged_ssus:
- _id: ScienComp
alternative_title:
- ISTA Thesis
article_processing_charge: No
author:
- first_name: Elias
  full_name: Frantar, Elias
  id: 09a8f98d-ec99-11ea-ae11-c063a7b7fe5f
  last_name: Frantar
citation:
  ama: 'Frantar E. Compressing large neural networks: Algorithms, systems and scaling
    laws. 2024. doi:<a href="https://doi.org/10.15479/at:ista:17485">10.15479/at:ista:17485</a>'
  apa: 'Frantar, E. (2024). <i>Compressing large neural networks: Algorithms, systems
    and scaling laws</i>. Institute of Science and Technology Austria. <a href="https://doi.org/10.15479/at:ista:17485">https://doi.org/10.15479/at:ista:17485</a>'
  chicago: 'Frantar, Elias. “Compressing Large Neural Networks: Algorithms, Systems
    and Scaling Laws.” Institute of Science and Technology Austria, 2024. <a href="https://doi.org/10.15479/at:ista:17485">https://doi.org/10.15479/at:ista:17485</a>.'
  ieee: 'E. Frantar, “Compressing large neural networks: Algorithms, systems and scaling
    laws,” Institute of Science and Technology Austria, 2024.'
  ista: 'Frantar E. 2024. Compressing large neural networks: Algorithms, systems and
    scaling laws. Institute of Science and Technology Austria.'
  mla: 'Frantar, Elias. <i>Compressing Large Neural Networks: Algorithms, Systems
    and Scaling Laws</i>. Institute of Science and Technology Austria, 2024, doi:<a
    href="https://doi.org/10.15479/at:ista:17485">10.15479/at:ista:17485</a>.'
  short: 'E. Frantar, Compressing Large Neural Networks: Algorithms, Systems and Scaling
    Laws, Institute of Science and Technology Austria, 2024.'
corr_author: '1'
das_tickbox: '0'
date_created: 2024-09-02T11:01:48Z
date_published: 2024-09-05T00:00:00Z
date_updated: 2026-10-02T11:19:46Z
day: '05'
ddc:
- '000'
degree_awarded: PhD
department:
- _id: GradSch
- _id: DaAl
doi: 10.15479/at:ista:17485
doi_confirm: '1'
ec_funded: 1
file:
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  checksum: 5d785645805a78c5b4ce7cc3df557b09
  content_type: application/zip
  creator: efrantar
  date_created: 2024-09-05T12:04:11Z
  date_updated: 2024-09-05T12:04:11Z
  file_id: '17570'
  file_name: thesis-final.zip
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has_accepted_license: '1'
language:
- iso: eng
month: '09'
oa: 1
oa_version: Published Version
page: '129'
project:
- _id: 268A44D6-B435-11E9-9278-68D0E5697425
  call_identifier: H2020
  grant_number: '805223'
  name: Elastic Coordination for Scalable Machine Learning
publication_identifier:
  issn:
  - 2663-337X
publication_status: published
publisher: Institute of Science and Technology Austria
related_material:
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    relation: part_of_dissertation
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    relation: part_of_dissertation
    status: public
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    relation: part_of_dissertation
    status: public
  - id: '18062'
    relation: part_of_dissertation
    status: public
researchdata_availability: no
status: public
supervisor:
- first_name: Dan-Adrian
  full_name: Alistarh, Dan-Adrian
  id: 4A899BFC-F248-11E8-B48F-1D18A9856A87
  last_name: Alistarh
  orcid: 0000-0003-3650-940X
supplementarymaterial: no
title: 'Compressing large neural networks: Algorithms, systems and scaling laws'
type: dissertation
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
year: '2024'
...
---
_id: '18062'
abstract:
- lang: eng
  text: 'We explore the impact of parameter sparsity on the scaling behavior of Transformers
    trained on massive datasets (i.e., "foundation models"), in both vision and language
    domains. In this setting, we identify the first scaling law describing the relationship
    between weight sparsity, number of non-zero parameters, and amount of training
    data, which we validate empirically across model and data scales; on ViT/JFT-4B
    and T5/C4. These results allow us to characterize the "optimal sparsity", the
    sparsity level which yields the best performance for a given effective model size
    and training budget. For a fixed number of non-zero parameters, we identify that
    the optimal sparsity increases with the amount of data used for training. We also
    extend our study to different sparsity structures (such as the hardware-friendly
    n:m pattern) and strategies (such as starting from a pretrained dense model).
    Our findings shed light on the power and limitations of weight sparsity across
    various parameter and computational settings, offering both theoretical understanding
    and practical implications for leveraging sparsity towards computational efficiency
    improvements. We provide pruning and scaling law fitting code at: github.com/google-research/jaxpruner/tree/main/jaxpruner/projects/bigsparse.'
article_processing_charge: No
arxiv: 1
author:
- first_name: Elias
  full_name: Frantar, Elias
  id: 09a8f98d-ec99-11ea-ae11-c063a7b7fe5f
  last_name: Frantar
- first_name: Carlos Riquelme
  full_name: Ruiz, Carlos Riquelme
  last_name: Ruiz
- first_name: Neil
  full_name: Houlsby, Neil
  last_name: Houlsby
- first_name: Dan-Adrian
  full_name: Alistarh, Dan-Adrian
  id: 4A899BFC-F248-11E8-B48F-1D18A9856A87
  last_name: Alistarh
  orcid: 0000-0003-3650-940X
- first_name: Utku
  full_name: Evci, Utku
  last_name: Evci
citation:
  ama: 'Frantar E, Ruiz CR, Houlsby N, Alistarh D-A, Evci U. Scaling laws for sparsely-connected
    foundation models. In: <i>The Twelfth International Conference on Learning Representations</i>.
    ; 2024.'
  apa: Frantar, E., Ruiz, C. R., Houlsby, N., Alistarh, D.-A., &#38; Evci, U. (2024).
    Scaling laws for sparsely-connected foundation models. In <i>The Twelfth International
    Conference on Learning Representations</i>. Vienna, Austria.
  chicago: Frantar, Elias, Carlos Riquelme Ruiz, Neil Houlsby, Dan-Adrian Alistarh,
    and Utku Evci. “Scaling Laws for Sparsely-Connected Foundation Models.” In <i>The
    Twelfth International Conference on Learning Representations</i>, 2024.
  ieee: E. Frantar, C. R. Ruiz, N. Houlsby, D.-A. Alistarh, and U. Evci, “Scaling
    laws for sparsely-connected foundation models,” in <i>The Twelfth International
    Conference on Learning Representations</i>, Vienna, Austria, 2024.
  ista: 'Frantar E, Ruiz CR, Houlsby N, Alistarh D-A, Evci U. 2024. Scaling laws for
    sparsely-connected foundation models. The Twelfth International Conference on
    Learning Representations. ICLR: International Conference on Learning Representations.'
  mla: Frantar, Elias, et al. “Scaling Laws for Sparsely-Connected Foundation Models.”
    <i>The Twelfth International Conference on Learning Representations</i>, 2024.
  short: E. Frantar, C.R. Ruiz, N. Houlsby, D.-A. Alistarh, U. Evci, in:, The Twelfth
    International Conference on Learning Representations, 2024.
conference:
  end_date: 2024-05-07
  location: Vienna, Austria
  name: 'ICLR: International Conference on Learning Representations'
  start_date: 2024-05-07
corr_author: '1'
das_tickbox: '0'
date_created: 2024-09-13T10:31:08Z
date_published: 2024-01-16T00:00:00Z
date_updated: 2026-10-02T11:19:46Z
day: '16'
ddc:
- '000'
department:
- _id: DaAl
external_id:
  arxiv:
  - '2309.08520'
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://openreview.net/forum?id=i9K2ZWkYIP
month: '01'
oa: 1
oa_version: Published Version
publication: The Twelfth International Conference on Learning Representations
publication_status: published
quality_controlled: '1'
related_material:
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  - id: '17485'
    relation: dissertation_contains
    status: public
researchdata_availability: no
scopus_import: '1'
status: public
supplementarymaterial: no
title: Scaling laws for sparsely-connected foundation models
type: conference
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
year: '2024'
...
---
_id: '18061'
abstract:
- lang: eng
  text: 'Mixture-of-Experts (MoE) architectures offer a general solution to the high
    inference costs of large language models (LLMs) via sparse routing, bringing faster
    and more accurate models, at the cost of massive parameter counts. For example,
    the SwitchTransformer-c2048 model has 1.6 trillion parameters, requiring 3.2TB
    of accelerator memory to run efficiently, which makes practical deployment challenging
    and expensive. In this paper, we present a solution to this memory problem, in
    form of a new compression and execution framework called QMoE. Specifically, QMoE
    consists of a scalable algorithm which accurately compresses trillion-parameter
    MoEs to less than 1 bit per parameter, in a custom format co-designed with bespoke
    GPU decoding kernels to facilitate efficient end-to-end compressed inference,
    with minor runtime overheads relative to uncompressed execution. Concretely, QMoE
    can compress the 1.6 trillion parameter SwitchTransformer-c2048 model to less
    than 160GB (20x compression, 0.8 bits per parameter) at only minor accuracy loss,
    in less than a day on a single GPU. This enables, for the first time, the execution
    of a trillion-parameter model on affordable commodity hardware, like a single
    server with 4x NVIDIA A6000 or 8x NVIDIA 3090 GPUs, at less than 5% runtime overhead
    relative to ideal uncompressed inference. The anonymized code is available at:
    github.com/mlsys24-qmoe/qmoe.'
article_processing_charge: No
author:
- first_name: Elias
  full_name: Frantar, Elias
  id: 09a8f98d-ec99-11ea-ae11-c063a7b7fe5f
  last_name: Frantar
- first_name: Dan-Adrian
  full_name: Alistarh, Dan-Adrian
  id: 4A899BFC-F248-11E8-B48F-1D18A9856A87
  last_name: Alistarh
  orcid: 0000-0003-3650-940X
citation:
  ama: 'Frantar E, Alistarh D-A. QMoE: Sub-1-bit compression of trillion parameter
    models. In: <i>Proceedings of Machine Learning and Systems</i>. Vol 6. ; 2024.'
  apa: 'Frantar, E., &#38; Alistarh, D.-A. (2024). QMoE: Sub-1-bit compression of
    trillion parameter models. In <i>Proceedings of Machine Learning and Systems</i>
    (Vol. 6). Santa Clara, CA, United States.'
  chicago: 'Frantar, Elias, and Dan-Adrian Alistarh. “QMoE: Sub-1-Bit Compression
    of Trillion Parameter Models.” In <i>Proceedings of Machine Learning and Systems</i>,
    Vol. 6, 2024.'
  ieee: 'E. Frantar and D.-A. Alistarh, “QMoE: Sub-1-bit compression of trillion parameter
    models,” in <i>Proceedings of Machine Learning and Systems</i>, Santa Clara, CA,
    United States, 2024, vol. 6.'
  ista: 'Frantar E, Alistarh D-A. 2024. QMoE: Sub-1-bit compression of trillion parameter
    models. Proceedings of Machine Learning and Systems. MLSys: Machine Learning and
    Systems vol. 6.'
  mla: 'Frantar, Elias, and Dan-Adrian Alistarh. “QMoE: Sub-1-Bit Compression of Trillion
    Parameter Models.” <i>Proceedings of Machine Learning and Systems</i>, vol. 6,
    2024.'
  short: E. Frantar, D.-A. Alistarh, in:, Proceedings of Machine Learning and Systems,
    2024.
conference:
  end_date: 2024-05-16
  location: Santa Clara, CA, United States
  name: 'MLSys: Machine Learning and Systems'
  start_date: 2024-05-13
corr_author: '1'
das_tickbox: '0'
date_created: 2024-09-13T10:01:38Z
date_published: 2024-05-01T00:00:00Z
date_updated: 2026-10-02T11:19:46Z
day: '01'
ddc:
- '000'
department:
- _id: DaAl
intvolume: '         6'
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://proceedings.mlsys.org/paper_files/paper/2024/hash/c74b624843218d9b6713fcf299d6d5e4-Abstract-Conference.html
month: '05'
oa: 1
oa_version: Published Version
publication: Proceedings of Machine Learning and Systems
publication_status: published
quality_controlled: '1'
related_material:
  record:
  - id: '17485'
    relation: dissertation_contains
    status: public
researchdata_availability: yes
status: public
supplementarymaterial: no
title: 'QMoE: Sub-1-bit compression of trillion parameter models'
type: conference
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 6
year: '2024'
...
---
OA_place: publisher
_id: '17490'
abstract:
- lang: eng
  text: "Deep learning is essential in numerous applications nowadays, with many recent
    advancements made possible by training very large models. Despite their broad
    applicability, training neural networks is often time-intensive, and it is usually
    impractical to manage large models and datasets on a single machine. To address
    these issues, distributed deep learning training has become increasingly important.
    However, distributed training requires synchronization among nodes, and the mini-batch
    stochastic gradient descent algorithm places a significant load on network connections.
    A possible solution to tackle the synchronization bottleneck is to reduce a message
    size by lossy compression.\r\n\r\nIn this thesis, we investigate systems and algorithmic
    approaches to communication compression during training. From the systems perspective,
    we demonstrate that a common approach of expensive hardware overprovisioning can
    be replaced through a thorough system design. We introduce a framework that introduces
    efficient software support for compressed communication in machine learning applications,
    applicable to both multi-GPU single-node training and larger-scale multi-node
    training. Our framework integrates with popular ML frameworks, providing up to
    3x speedups for multi-GPU nodes based on commodity hardware and order-of-magnitude
    improvements in the multi-node setting, with negligible impact on accuracy.\r\n\r\nAlso,
    we consider an application of our framework to different communication schemes,
    such as Fully Sharded Data Parallel. We provide strong convergence guarantees
    for the compression in such a setup. Empirical validation shows that our method
    preserves model accuracy for GPT-family models with up to 1.3 billion parameters,
    while completely removing the communication bottlenecks of non-compressed alternatives,
    providing up to 2.2x speedups end-to-end.\r\n\r\nFrom the algorithmic side, we
    propose a general framework that dynamically adjusts the degree of compression
    across a model's layers during training. This approach enhances overall compression
    and results in significant speedups without compromising accuracy. Our algorithm
    utilizes an adaptive algorithm that automatically selects the optimal compression
    parameters for model layers, ensuring the best compression ratio while adhering
    to an error constraint. Our method is effective across all existing families of
    compression methods. It achieves up to 2.5x faster training and up to a 5x improvement
    in compression compared to efficient implementations of current approaches. Additionally,
    LGreCo can complement existing adaptive algorithms.\r\n"
acknowledged_ssus:
- _id: ScienComp
alternative_title:
- ISTA Thesis
article_processing_charge: No
author:
- first_name: Ilia
  full_name: Markov, Ilia
  id: D0CF4148-C985-11E9-8066-0BDEE5697425
  last_name: Markov
citation:
  ama: 'Markov I. Communication-efficient distributed training of deep neural networks :
    An algorithms and systems perspective. 2024. doi:<a href="https://doi.org/10.15479/at:ista:17490">10.15479/at:ista:17490</a>'
  apa: 'Markov, I. (2024). <i>Communication-efficient distributed training of deep
    neural networks : An algorithms and systems perspective</i>. Institute of Science
    and Technology Austria. <a href="https://doi.org/10.15479/at:ista:17490">https://doi.org/10.15479/at:ista:17490</a>'
  chicago: 'Markov, Ilia. “Communication-Efficient Distributed Training of Deep Neural
    Networks : An Algorithms and Systems Perspective.” Institute of Science and Technology
    Austria, 2024. <a href="https://doi.org/10.15479/at:ista:17490">https://doi.org/10.15479/at:ista:17490</a>.'
  ieee: 'I. Markov, “Communication-efficient distributed training of deep neural networks :
    An algorithms and systems perspective,” Institute of Science and Technology Austria,
    2024.'
  ista: 'Markov I. 2024. Communication-efficient distributed training of deep neural
    networks : An algorithms and systems perspective. Institute of Science and Technology
    Austria.'
  mla: 'Markov, Ilia. <i>Communication-Efficient Distributed Training of Deep Neural
    Networks : An Algorithms and Systems Perspective</i>. Institute of Science and
    Technology Austria, 2024, doi:<a href="https://doi.org/10.15479/at:ista:17490">10.15479/at:ista:17490</a>.'
  short: 'I. Markov, Communication-Efficient Distributed Training of Deep Neural Networks :
    An Algorithms and Systems Perspective, Institute of Science and Technology Austria,
    2024.'
corr_author: '1'
das_tickbox: '0'
date_created: 2024-09-04T08:51:11Z
date_published: 2024-09-04T00:00:00Z
date_updated: 2026-10-02T11:20:06Z
day: '04'
ddc:
- '000'
degree_awarded: PhD
department:
- _id: GradSch
- _id: DaAl
doi: 10.15479/at:ista:17490
doi_confirm: '1'
ec_funded: 1
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  file_size: 43327753
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  date_created: 2024-09-04T08:36:06Z
  date_updated: 2024-09-04T08:36:06Z
  file_id: '17492'
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file_date_updated: 2024-09-04T08:36:06Z
fulldoi: https://doi.org/10.15479/at:ista:17490
has_accepted_license: '1'
language:
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month: '09'
oa: 1
oa_version: Published Version
page: '102'
project:
- _id: 268A44D6-B435-11E9-9278-68D0E5697425
  call_identifier: H2020
  grant_number: '805223'
  name: Elastic Coordination for Scalable Machine Learning
publication_identifier:
  issn:
  - 2663-337X
publication_status: published
publisher: Institute of Science and Technology Austria
related_material:
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  - id: '14461'
    relation: part_of_dissertation
    status: public
  - id: '12780'
    relation: part_of_dissertation
    status: public
  - id: '17456'
    relation: part_of_dissertation
    status: public
researchdata_availability: no
status: public
supervisor:
- first_name: Dan-Adrian
  full_name: Alistarh, Dan-Adrian
  id: 4A899BFC-F248-11E8-B48F-1D18A9856A87
  last_name: Alistarh
  orcid: 0000-0003-3650-940X
supplementarymaterial: no
title: 'Communication-efficient distributed training of deep neural networks : An
  algorithms and systems perspective'
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  short: CC BY-NC-SA (4.0)
type: dissertation
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
year: '2024'
...
