---
_id: '13375'
abstract:
- lang: eng
  text: 'Dissipative self-assembly leads to structures and materials that exist away
    from equilibrium by continuously exchanging energy and materials with the external
    environment. Although this mode of self-assembly is ubiquitous in nature, where
    it gives rise to functions such as signal processing, motility, self-healing,
    self-replication, and ultimately life, examples of dissipative self-assembly processes
    in man-made systems are few and far between. Herein, recent progress in developing
    diverse synthetic dissipative self-assembly systems is discussed. The systems
    reported thus far can be categorized into three classes, in which: i) the fuel
    chemically modifies the building blocks, thus triggering their self-assembly,
    ii) the fuel acts as a template interacting with the building blocks noncovalently,
    and iii) transient states are induced by the addition of two mutually exclusive
    stimuli. These early studies give rise to materials that would be difficult to
    obtain otherwise, including hydrogels with programmable lifetimes, vesicular nanoreactors,
    and membranes exhibiting transient conductivity.'
article_number: '1706750'
article_processing_charge: No
article_type: original
author:
- first_name: Soumen
  full_name: De, Soumen
  last_name: De
- first_name: Rafal
  full_name: Klajn, Rafal
  id: 8e84690e-1e48-11ed-a02b-a1e6fb8bb53b
  last_name: Klajn
citation:
  ama: De S, Klajn R. Dissipative self-assembly driven by the consumption of chemical
    fuels. <i>Advanced Materials</i>. 2018;30(41). doi:<a href="https://doi.org/10.1002/adma.201706750">10.1002/adma.201706750</a>
  apa: De, S., &#38; Klajn, R. (2018). Dissipative self-assembly driven by the consumption
    of chemical fuels. <i>Advanced Materials</i>. Wiley. <a href="https://doi.org/10.1002/adma.201706750">https://doi.org/10.1002/adma.201706750</a>
  chicago: De, Soumen, and Rafal Klajn. “Dissipative Self-Assembly Driven by the Consumption
    of Chemical Fuels.” <i>Advanced Materials</i>. Wiley, 2018. <a href="https://doi.org/10.1002/adma.201706750">https://doi.org/10.1002/adma.201706750</a>.
  ieee: S. De and R. Klajn, “Dissipative self-assembly driven by the consumption of
    chemical fuels,” <i>Advanced Materials</i>, vol. 30, no. 41. Wiley, 2018.
  ista: De S, Klajn R. 2018. Dissipative self-assembly driven by the consumption of
    chemical fuels. Advanced Materials. 30(41), 1706750.
  mla: De, Soumen, and Rafal Klajn. “Dissipative Self-Assembly Driven by the Consumption
    of Chemical Fuels.” <i>Advanced Materials</i>, vol. 30, no. 41, 1706750, Wiley,
    2018, doi:<a href="https://doi.org/10.1002/adma.201706750">10.1002/adma.201706750</a>.
  short: S. De, R. Klajn, Advanced Materials 30 (2018).
date_created: 2023-08-01T09:39:46Z
date_published: 2018-10-11T00:00:00Z
date_updated: 2023-08-07T10:56:26Z
day: '11'
doi: 10.1002/adma.201706750
extern: '1'
external_id:
  pmid:
  - '29520846'
intvolume: '        30'
issue: '41'
keyword:
- Mechanical Engineering
- Mechanics of Materials
- General Materials Science
language:
- iso: eng
month: '10'
oa_version: None
pmid: 1
publication: Advanced Materials
publication_identifier:
  eissn:
  - 1521-4095
  issn:
  - 0935-9648
publication_status: published
publisher: Wiley
quality_controlled: '1'
scopus_import: '1'
status: public
title: Dissipative self-assembly driven by the consumption of chemical fuels
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 30
year: '2018'
...
---
_id: '13376'
abstract:
- lang: eng
  text: Efficient molecular switching in confined spaces is critical for the successful
    development of artificial molecular machines. However, molecular switching events
    often entail large structural changes and therefore require conformational freedom,
    which is typically limited under confinement conditions. Here, we investigated
    the behavior of azobenzene—the key building block of light-controlled molecular
    machines—in a confined environment that is flexible and can adapt its shape to
    that of the bound guest. To this end, we encapsulated several structurally diverse
    azobenzenes within the cavity of a flexible, water-soluble coordination cage,
    and investigated their light-responsive behavior. Using UV/Vis absorption spectroscopy
    and a combination of NMR methods, we showed that each of the encapsulated azobenzenes
    exhibited distinct switching properties. An azobenzene forming a 1:1 host–guest
    inclusion complex could be efficiently photoisomerized in a reversible fashion.
    In contrast, successful switching in inclusion complexes incorporating two azobenzene
    guests was dependent on the availability of free cages in the system, and it involved
    reversible trafficking of azobenzene between the cages. In the absence of extra
    cages, photoswitching was either suppressed or it involved expulsion of azobenzene
    from the cage and consequently its precipitation from the solution. This finding
    was utilized to develop an information storage medium in which messages could
    be written and erased in a reversible fashion using light.
article_processing_charge: No
article_type: original
author:
- first_name: Dipak
  full_name: Samanta, Dipak
  last_name: Samanta
- first_name: Julius
  full_name: Gemen, Julius
  last_name: Gemen
- first_name: Zonglin
  full_name: Chu, Zonglin
  last_name: Chu
- first_name: Yael
  full_name: Diskin-Posner, Yael
  last_name: Diskin-Posner
- first_name: Linda J. W.
  full_name: Shimon, Linda J. W.
  last_name: Shimon
- first_name: Rafal
  full_name: Klajn, Rafal
  id: 8e84690e-1e48-11ed-a02b-a1e6fb8bb53b
  last_name: Klajn
citation:
  ama: Samanta D, Gemen J, Chu Z, Diskin-Posner Y, Shimon LJW, Klajn R. Reversible
    photoswitching of encapsulated azobenzenes in water. <i>Proceedings of the National
    Academy of Sciences</i>. 2018;115(38):9379-9384. doi:<a href="https://doi.org/10.1073/pnas.1712787115">10.1073/pnas.1712787115</a>
  apa: Samanta, D., Gemen, J., Chu, Z., Diskin-Posner, Y., Shimon, L. J. W., &#38;
    Klajn, R. (2018). Reversible photoswitching of encapsulated azobenzenes in water.
    <i>Proceedings of the National Academy of Sciences</i>. Proceedings of the National
    Academy of Sciences. <a href="https://doi.org/10.1073/pnas.1712787115">https://doi.org/10.1073/pnas.1712787115</a>
  chicago: Samanta, Dipak, Julius Gemen, Zonglin Chu, Yael Diskin-Posner, Linda J.
    W. Shimon, and Rafal Klajn. “Reversible Photoswitching of Encapsulated Azobenzenes
    in Water.” <i>Proceedings of the National Academy of Sciences</i>. Proceedings
    of the National Academy of Sciences, 2018. <a href="https://doi.org/10.1073/pnas.1712787115">https://doi.org/10.1073/pnas.1712787115</a>.
  ieee: D. Samanta, J. Gemen, Z. Chu, Y. Diskin-Posner, L. J. W. Shimon, and R. Klajn,
    “Reversible photoswitching of encapsulated azobenzenes in water,” <i>Proceedings
    of the National Academy of Sciences</i>, vol. 115, no. 38. Proceedings of the
    National Academy of Sciences, pp. 9379–9384, 2018.
  ista: Samanta D, Gemen J, Chu Z, Diskin-Posner Y, Shimon LJW, Klajn R. 2018. Reversible
    photoswitching of encapsulated azobenzenes in water. Proceedings of the National
    Academy of Sciences. 115(38), 9379–9384.
  mla: Samanta, Dipak, et al. “Reversible Photoswitching of Encapsulated Azobenzenes
    in Water.” <i>Proceedings of the National Academy of Sciences</i>, vol. 115, no.
    38, Proceedings of the National Academy of Sciences, 2018, pp. 9379–84, doi:<a
    href="https://doi.org/10.1073/pnas.1712787115">10.1073/pnas.1712787115</a>.
  short: D. Samanta, J. Gemen, Z. Chu, Y. Diskin-Posner, L.J.W. Shimon, R. Klajn,
    Proceedings of the National Academy of Sciences 115 (2018) 9379–9384.
date_created: 2023-08-01T09:40:00Z
date_published: 2018-05-01T00:00:00Z
date_updated: 2023-08-07T10:58:11Z
day: '01'
doi: 10.1073/pnas.1712787115
extern: '1'
external_id:
  pmid:
  - '29717041'
intvolume: '       115'
issue: '38'
keyword:
- Multidisciplinary
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://doi.org/10.1073/pnas.1712787115
month: '05'
oa: 1
oa_version: Published Version
page: 9379-9384
pmid: 1
publication: Proceedings of the National Academy of Sciences
publication_identifier:
  eissn:
  - 1091-6490
  issn:
  - 0027-8424
publication_status: published
publisher: Proceedings of the National Academy of Sciences
quality_controlled: '1'
scopus_import: '1'
status: public
title: Reversible photoswitching of encapsulated azobenzenes in water
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 115
year: '2018'
...
---
_id: '13377'
abstract:
- lang: eng
  text: Confining organic molecules to the surfaces of inorganic nanoparticles can
    induce intermolecular interactions between them, which can affect the composition
    of the mixed self-assembled monolayers obtained by co-adsorption from solution
    of two different molecules. Two thiolated ligands (a dialkylviologen and a zwitterionic
    sulfobetaine) that can interact with each other electrostatically were coadsorbed
    onto gold nanoparticles. The nanoparticles favor a narrow range of ratios of these
    two molecules that is largely independent of the molar ratio in solution. Changing
    the solution molar ratio of the two ligands by a factor of 5 000 affects the on-nanoparticle
    ratio of these ligands by only threefold. This behavior is reminiscent of the
    formation of insoluble inorganic salts (such as AgCl), which similarly compensate
    positive and negative charges upon crystallizing. Our results pave the way towards
    developing well-defined hybrid organic–inorganic nanostructures.
article_processing_charge: No
article_type: original
author:
- first_name: Zonglin
  full_name: Chu, Zonglin
  last_name: Chu
- first_name: Yanxiao
  full_name: Han, Yanxiao
  last_name: Han
- first_name: Petr
  full_name: Král, Petr
  last_name: Král
- first_name: Rafal
  full_name: Klajn, Rafal
  id: 8e84690e-1e48-11ed-a02b-a1e6fb8bb53b
  last_name: Klajn
citation:
  ama: 'Chu Z, Han Y, Král P, Klajn R. “Precipitation on nanoparticles”: Attractive
    intermolecular interactions stabilize specific ligand ratios on the surfaces of
    nanoparticles. <i>Angewandte Chemie International Edition</i>. 2018;57(24):7023-7027.
    doi:<a href="https://doi.org/10.1002/anie.201800673">10.1002/anie.201800673</a>'
  apa: 'Chu, Z., Han, Y., Král, P., &#38; Klajn, R. (2018). “Precipitation on nanoparticles”:
    Attractive intermolecular interactions stabilize specific ligand ratios on the
    surfaces of nanoparticles. <i>Angewandte Chemie International Edition</i>. Wiley.
    <a href="https://doi.org/10.1002/anie.201800673">https://doi.org/10.1002/anie.201800673</a>'
  chicago: 'Chu, Zonglin, Yanxiao Han, Petr Král, and Rafal Klajn. “‘Precipitation
    on Nanoparticles’: Attractive Intermolecular Interactions Stabilize Specific Ligand
    Ratios on the Surfaces of Nanoparticles.” <i>Angewandte Chemie International Edition</i>.
    Wiley, 2018. <a href="https://doi.org/10.1002/anie.201800673">https://doi.org/10.1002/anie.201800673</a>.'
  ieee: 'Z. Chu, Y. Han, P. Král, and R. Klajn, “‘Precipitation on nanoparticles’:
    Attractive intermolecular interactions stabilize specific ligand ratios on the
    surfaces of nanoparticles,” <i>Angewandte Chemie International Edition</i>, vol.
    57, no. 24. Wiley, pp. 7023–7027, 2018.'
  ista: 'Chu Z, Han Y, Král P, Klajn R. 2018. “Precipitation on nanoparticles”: Attractive
    intermolecular interactions stabilize specific ligand ratios on the surfaces of
    nanoparticles. Angewandte Chemie International Edition. 57(24), 7023–7027.'
  mla: 'Chu, Zonglin, et al. “‘Precipitation on Nanoparticles’: Attractive Intermolecular
    Interactions Stabilize Specific Ligand Ratios on the Surfaces of Nanoparticles.”
    <i>Angewandte Chemie International Edition</i>, vol. 57, no. 24, Wiley, 2018,
    pp. 7023–27, doi:<a href="https://doi.org/10.1002/anie.201800673">10.1002/anie.201800673</a>.'
  short: Z. Chu, Y. Han, P. Král, R. Klajn, Angewandte Chemie International Edition
    57 (2018) 7023–7027.
date_created: 2023-08-01T09:40:16Z
date_published: 2018-06-11T00:00:00Z
date_updated: 2023-08-07T11:14:28Z
day: '11'
doi: 10.1002/anie.201800673
extern: '1'
external_id:
  pmid:
  - '29673022'
intvolume: '        57'
issue: '24'
keyword:
- General Chemistry
- Catalysis
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://doi.org/10.1002/anie.201800673
month: '06'
oa: 1
oa_version: Published Version
page: 7023-7027
pmid: 1
publication: Angewandte Chemie International Edition
publication_identifier:
  eissn:
  - 1521-3773
  issn:
  - 1433-7851
publication_status: published
publisher: Wiley
quality_controlled: '1'
scopus_import: '1'
status: public
title: '“Precipitation on nanoparticles”: Attractive intermolecular interactions stabilize
  specific ligand ratios on the surfaces of nanoparticles'
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 57
year: '2018'
...
---
_id: '13379'
article_number: '1700827'
article_processing_charge: No
article_type: letter_note
author:
- first_name: David
  full_name: Bléger, David
  last_name: Bléger
- first_name: Rafal
  full_name: Klajn, Rafal
  id: 8e84690e-1e48-11ed-a02b-a1e6fb8bb53b
  last_name: Klajn
citation:
  ama: Bléger D, Klajn R. Integrating macromolecules with molecular switches. <i>Macromolecular
    Rapid Communications</i>. 2018;39(1). doi:<a href="https://doi.org/10.1002/marc.201700827">10.1002/marc.201700827</a>
  apa: Bléger, D., &#38; Klajn, R. (2018). Integrating macromolecules with molecular
    switches. <i>Macromolecular Rapid Communications</i>. Wiley. <a href="https://doi.org/10.1002/marc.201700827">https://doi.org/10.1002/marc.201700827</a>
  chicago: Bléger, David, and Rafal Klajn. “Integrating Macromolecules with Molecular
    Switches.” <i>Macromolecular Rapid Communications</i>. Wiley, 2018. <a href="https://doi.org/10.1002/marc.201700827">https://doi.org/10.1002/marc.201700827</a>.
  ieee: D. Bléger and R. Klajn, “Integrating macromolecules with molecular switches,”
    <i>Macromolecular Rapid Communications</i>, vol. 39, no. 1. Wiley, 2018.
  ista: Bléger D, Klajn R. 2018. Integrating macromolecules with molecular switches.
    Macromolecular Rapid Communications. 39(1), 1700827.
  mla: Bléger, David, and Rafal Klajn. “Integrating Macromolecules with Molecular
    Switches.” <i>Macromolecular Rapid Communications</i>, vol. 39, no. 1, 1700827,
    Wiley, 2018, doi:<a href="https://doi.org/10.1002/marc.201700827">10.1002/marc.201700827</a>.
  short: D. Bléger, R. Klajn, Macromolecular Rapid Communications 39 (2018).
date_created: 2023-08-01T09:40:48Z
date_published: 2018-01-08T00:00:00Z
date_updated: 2023-08-07T11:16:49Z
day: '08'
doi: 10.1002/marc.201700827
extern: '1'
external_id:
  pmid:
  - '29314396'
intvolume: '        39'
issue: '1'
keyword:
- Materials Chemistry
- Polymers and Plastics
- Organic Chemistry
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://doi.org/10.1002/marc.201700827
month: '01'
oa: 1
oa_version: Published Version
pmid: 1
publication: Macromolecular Rapid Communications
publication_identifier:
  eissn:
  - 1521-3927
  issn:
  - 1022-1336
publication_status: published
publisher: Wiley
quality_controlled: '1'
scopus_import: '1'
status: public
title: Integrating macromolecules with molecular switches
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 39
year: '2018'
...
---
_id: '134'
abstract:
- lang: eng
  text: "The current state of the art in real-time two-dimensional water wave simulation
    requires developers to choose between efficient Fourier-based methods, which lack
    interactions with moving obstacles, and finite-difference or finite element methods,
    which handle environmental interactions but are significantly more expensive.
    This paper attempts to bridge this long-standing gap between complexity and performance,
    by proposing a new wave simulation method that can faithfully simulate wave interactions
    with moving obstacles in real time while simultaneously preserving minute details
    and accommodating very large simulation domains.\r\n\r\nPrevious methods for simulating
    2D water waves directly compute the change in height of the water surface, a strategy
    which imposes limitations based on the CFL condition (fast moving waves require
    small time steps) and Nyquist's limit (small wave details require closely-spaced
    simulation variables). This paper proposes a novel wavelet transformation that
    discretizes the liquid motion in terms of amplitude-like functions that vary over
    space, frequency, and direction, effectively generalizing Fourier-based methods
    to handle local interactions. Because these new variables change much more slowly
    over space than the original water height function, our change of variables drastically
    reduces the limitations of the CFL condition and Nyquist limit, allowing us to
    simulate highly detailed water waves at very large visual resolutions. Our discretization
    is amenable to fast summation and easy to parallelize. We also present basic extensions
    like pre-computed wave paths and two-way solid fluid coupling. Finally, we argue
    that our discretization provides a convenient set of variables for artistic manipulation,
    which we illustrate with a novel wave-painting interface."
acknowledged_ssus:
- _id: ScienComp
alternative_title:
- SIGGRAPH
article_number: '94'
article_processing_charge: No
author:
- first_name: Stefan
  full_name: Jeschke, Stefan
  id: 44D6411A-F248-11E8-B48F-1D18A9856A87
  last_name: Jeschke
- first_name: Tomas
  full_name: Skrivan, Tomas
  id: 486A5A46-F248-11E8-B48F-1D18A9856A87
  last_name: Skrivan
- first_name: Matthias
  full_name: Mueller Fischer, Matthias
  last_name: Mueller Fischer
- first_name: Nuttapong
  full_name: Chentanez, Nuttapong
  last_name: Chentanez
- first_name: Miles
  full_name: Macklin, Miles
  last_name: Macklin
- 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: Jeschke S, Skrivan T, Mueller Fischer M, Chentanez N, Macklin M, Wojtan C.
    Water surface wavelets. <i>ACM Transactions on Graphics</i>. 2018;37(4). doi:<a
    href="https://doi.org/10.1145/3197517.3201336">10.1145/3197517.3201336</a>
  apa: Jeschke, S., Skrivan, T., Mueller Fischer, M., Chentanez, N., Macklin, M.,
    &#38; Wojtan, C. (2018). Water surface wavelets. <i>ACM Transactions on Graphics</i>.
    ACM. <a href="https://doi.org/10.1145/3197517.3201336">https://doi.org/10.1145/3197517.3201336</a>
  chicago: Jeschke, Stefan, Tomas Skrivan, Matthias Mueller Fischer, Nuttapong Chentanez,
    Miles Macklin, and Chris Wojtan. “Water Surface Wavelets.” <i>ACM Transactions
    on Graphics</i>. ACM, 2018. <a href="https://doi.org/10.1145/3197517.3201336">https://doi.org/10.1145/3197517.3201336</a>.
  ieee: S. Jeschke, T. Skrivan, M. Mueller Fischer, N. Chentanez, M. Macklin, and
    C. Wojtan, “Water surface wavelets,” <i>ACM Transactions on Graphics</i>, vol.
    37, no. 4. ACM, 2018.
  ista: Jeschke S, Skrivan T, Mueller Fischer M, Chentanez N, Macklin M, Wojtan C.
    2018. Water surface wavelets. ACM Transactions on Graphics. 37(4), 94.
  mla: Jeschke, Stefan, et al. “Water Surface Wavelets.” <i>ACM Transactions on Graphics</i>,
    vol. 37, no. 4, 94, ACM, 2018, doi:<a href="https://doi.org/10.1145/3197517.3201336">10.1145/3197517.3201336</a>.
  short: S. Jeschke, T. Skrivan, M. Mueller Fischer, N. Chentanez, M. Macklin, C.
    Wojtan, ACM Transactions on Graphics 37 (2018).
date_created: 2018-12-11T11:44:48Z
date_published: 2018-07-30T00:00:00Z
date_updated: 2024-02-28T13:58:51Z
day: '30'
ddc:
- '000'
department:
- _id: ChWo
doi: 10.1145/3197517.3201336
ec_funded: 1
external_id:
  isi:
  - '000448185000055'
file:
- access_level: open_access
  checksum: db75ebabe2ec432bf41389e614d6ef62
  content_type: application/pdf
  creator: dernst
  date_created: 2018-12-18T09:59:23Z
  date_updated: 2020-07-14T12:44:45Z
  file_id: '5744'
  file_name: 2018_ACM_Jeschke.pdf
  file_size: 22185016
  relation: main_file
file_date_updated: 2020-07-14T12:44:45Z
has_accepted_license: '1'
intvolume: '        37'
isi: 1
issue: '4'
language:
- iso: eng
license: https://creativecommons.org/licenses/by-nc-sa/4.0/
month: '07'
oa: 1
oa_version: Published Version
project:
- _id: 2533E772-B435-11E9-9278-68D0E5697425
  call_identifier: H2020
  grant_number: '638176'
  name: Efficient Simulation of Natural Phenomena at Extremely Large Scales
- _id: 2564DBCA-B435-11E9-9278-68D0E5697425
  call_identifier: H2020
  grant_number: '665385'
  name: International IST Doctoral Program
publication: ACM Transactions on Graphics
publication_status: published
publisher: ACM
publist_id: '7789'
quality_controlled: '1'
related_material:
  link:
  - description: News on IST Homepage
    relation: press_release
    url: https://ist.ac.at/en/news/new-water-simulation-captures-small-details-even-in-large-scenes/
scopus_import: '1'
status: public
title: Water surface wavelets
tmp:
  image: /images/cc_by_nc_sa.png
  legal_code_url: https://creativecommons.org/licenses/by-nc-sa/4.0/legalcode
  name: Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC
    BY-NC-SA 4.0)
  short: CC BY-NC-SA (4.0)
type: journal_article
user_id: 2EBD1598-F248-11E8-B48F-1D18A9856A87
volume: 37
year: '2018'
...
---
_id: '13473'
abstract:
- lang: eng
  text: Stripped-envelope stars form in binary systems after losing mass through Roche-lobe
    overflow. They bear astrophysical significance as sources of UV and ionizing radiation
    in older stellar populations and, if sufficiently massive, as stripped supernova
    progenitors. Binary evolutionary models predict that they are common, but only
    a handful of subdwarfs with B-type companions are known. The question is whether
    a large population of such systems has evaded detection as a result of biases,
    or whether the model predictions are wrong. We reanalyze the well-studied post-interaction
    binary φ Persei. Recently, new data have improved the orbital solution of the
    system, which contains an ~1.2M⊙ stripped-envelope star and a rapidly rotating
    ~9.6M⊙ Be star. We compare with an extensive grid of evolutionary models using
    a Bayesian approach and constrain the initial masses of the progenitor to 7.2
    ± 0.4M⊙ for the stripped star and 3.8 ± 0.4M⊙ for the Be star. The system must
    have evolved through near-conservative mass transfer. These findings are consistent
    with earlier studies. The age we obtain, 57 ± 9 Myr, is in excellent agreement
    with the age of the α Persei cluster. We note that neither star was initially
    massive enough to produce a core-collapse supernova, but mass exchange pushed
    the Be star above the mass threshold. We find that the subdwarf is overluminous
    for its mass by almost an order of magnitude, compared to the expectations for
    a helium core burning star. We can only reconcile this if the subdwarf resides
    in a late phase of helium shell burning, which lasts only 2–3% of the total lifetime
    as a subdwarf. Assuming continuous star formation implies that up to ~50 less
    evolved, dimmer subdwarfs exist for each system similar to φ Persei, but have
    evaded detection so far. Our findings can be interpreted as a strong indication
    that a substantial population of stripped-envelope stars indeed exists, but has
    so far evaded detection because of observational biases and lack of large-scale
    systematic searches.
article_number: A30
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: A.
  full_name: Schootemeijer, A.
  last_name: Schootemeijer
- first_name: Ylva Louise Linsdotter
  full_name: Götberg, Ylva Louise Linsdotter
  id: d0648d0c-0f64-11ee-a2e0-dd0faa2e4f7d
  last_name: Götberg
  orcid: 0000-0002-6960-6911
- first_name: S. E.
  full_name: de Mink, S. E.
  last_name: de Mink
- first_name: D.
  full_name: Gies, D.
  last_name: Gies
- first_name: E.
  full_name: Zapartas, E.
  last_name: Zapartas
citation:
  ama: Schootemeijer A, Götberg YLL, de Mink SE, Gies D, Zapartas E. Clues about the
    scarcity of stripped-envelope stars from the evolutionary state of the sdO+Be
    binary system φ Persei. <i>Astronomy &#38; Astrophysics</i>. 2018;615. doi:<a
    href="https://doi.org/10.1051/0004-6361/201731194">10.1051/0004-6361/201731194</a>
  apa: Schootemeijer, A., Götberg, Y. L. L., de Mink, S. E., Gies, D., &#38; Zapartas,
    E. (2018). Clues about the scarcity of stripped-envelope stars from the evolutionary
    state of the sdO+Be binary system φ Persei. <i>Astronomy &#38; Astrophysics</i>.
    EDP Sciences. <a href="https://doi.org/10.1051/0004-6361/201731194">https://doi.org/10.1051/0004-6361/201731194</a>
  chicago: Schootemeijer, A., Ylva Louise Linsdotter Götberg, S. E. de Mink, D. Gies,
    and E. Zapartas. “Clues about the Scarcity of Stripped-Envelope Stars from the
    Evolutionary State of the SdO+Be Binary System φ Persei.” <i>Astronomy &#38; Astrophysics</i>.
    EDP Sciences, 2018. <a href="https://doi.org/10.1051/0004-6361/201731194">https://doi.org/10.1051/0004-6361/201731194</a>.
  ieee: A. Schootemeijer, Y. L. L. Götberg, S. E. de Mink, D. Gies, and E. Zapartas,
    “Clues about the scarcity of stripped-envelope stars from the evolutionary state
    of the sdO+Be binary system φ Persei,” <i>Astronomy &#38; Astrophysics</i>, vol.
    615. EDP Sciences, 2018.
  ista: Schootemeijer A, Götberg YLL, de Mink SE, Gies D, Zapartas E. 2018. Clues
    about the scarcity of stripped-envelope stars from the evolutionary state of the
    sdO+Be binary system φ Persei. Astronomy &#38; Astrophysics. 615, A30.
  mla: Schootemeijer, A., et al. “Clues about the Scarcity of Stripped-Envelope Stars
    from the Evolutionary State of the SdO+Be Binary System φ Persei.” <i>Astronomy
    &#38; Astrophysics</i>, vol. 615, A30, EDP Sciences, 2018, doi:<a href="https://doi.org/10.1051/0004-6361/201731194">10.1051/0004-6361/201731194</a>.
  short: A. Schootemeijer, Y.L.L. Götberg, S.E. de Mink, D. Gies, E. Zapartas, Astronomy
    &#38; Astrophysics 615 (2018).
date_created: 2023-08-03T10:14:37Z
date_published: 2018-07-06T00:00:00Z
date_updated: 2023-08-09T12:22:52Z
day: '06'
doi: 10.1051/0004-6361/201731194
extern: '1'
external_id:
  arxiv:
  - '1803.02379'
intvolume: '       615'
keyword:
- Space and Planetary Science
- Astronomy and Astrophysics
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://doi.org/10.1051/0004-6361/201731194
month: '07'
oa: 1
oa_version: Published Version
publication: Astronomy & Astrophysics
publication_identifier:
  eissn:
  - 1432-0746
  issn:
  - 0004-6361
publication_status: published
publisher: EDP Sciences
quality_controlled: '1'
scopus_import: '1'
status: public
title: Clues about the scarcity of stripped-envelope stars from the evolutionary state
  of the sdO+Be binary system φ Persei
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 615
year: '2018'
...
---
_id: '13474'
abstract:
- lang: eng
  text: Recent surveys of the Magellanic Clouds have revealed a subtype of Wolf–Rayet
    (WR) star with peculiar properties. WN3/O3 spectra exhibit both WR-like emission
    and O3 V-like absorption – but at lower luminosity than O3 V or WN stars. We examine
    the projected spatial distribution of WN3/O3 stars in the Large Magellanic Cloud
    as compared to O-type stars. Surprisingly, WN3/O3 stars are among the most isolated
    of all classes of massive stars; they have a distribution similar to red supergiants
    dominated by initial masses of 10–15 M⊙, and are far more dispersed than classical
    WR stars or luminous blue variables. Their lack of association with clusters of
    O-type stars suggests strongly that WN3/O3 stars are not the descendants of single
    massive stars (30 M⊙ or above). Instead, they are likely products of interacting
    binaries at lower initial mass (10–18 M⊙). Comparison with binary models suggests
    a probable origin with primaries in this mass range that were stripped of their
    H envelopes through non-conservative mass transfer by a low-mass secondary. We
    show that model spectra and positions on the Hertzsprung–Russell diagram for binary-stripped
    stars are consistent with WN3/O3 stars. Monitoring radial velocities with high-resolution
    spectra can test for low-mass companions or runaway velocities. With lower initial
    mass and environments that avoid very massive stars, the WN3/O3 stars fit expectations
    for progenitors of Type Ib and possibly Type Ibn supernovae.
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Nathan
  full_name: Smith, Nathan
  last_name: Smith
- first_name: Ylva Louise Linsdotter
  full_name: Götberg, Ylva Louise Linsdotter
  id: d0648d0c-0f64-11ee-a2e0-dd0faa2e4f7d
  last_name: Götberg
  orcid: 0000-0002-6960-6911
- first_name: Selma E
  full_name: de Mink, Selma E
  last_name: de Mink
citation:
  ama: Smith N, Götberg YLL, de Mink SE. Extreme isolation of WN3/O3 stars and implications
    for their evolutionary origin as the elusive stripped binaries. <i>Monthly Notices
    of the Royal Astronomical Society</i>. 2018;475(1):772-782. doi:<a href="https://doi.org/10.1093/mnras/stx3181">10.1093/mnras/stx3181</a>
  apa: Smith, N., Götberg, Y. L. L., &#38; de Mink, S. E. (2018). Extreme isolation
    of WN3/O3 stars and implications for their evolutionary origin as the elusive
    stripped binaries. <i>Monthly Notices of the Royal Astronomical Society</i>. Oxford
    University Press. <a href="https://doi.org/10.1093/mnras/stx3181">https://doi.org/10.1093/mnras/stx3181</a>
  chicago: Smith, Nathan, Ylva Louise Linsdotter Götberg, and Selma E de Mink. “Extreme
    Isolation of WN3/O3 Stars and Implications for Their Evolutionary Origin as the
    Elusive Stripped Binaries.” <i>Monthly Notices of the Royal Astronomical Society</i>.
    Oxford University Press, 2018. <a href="https://doi.org/10.1093/mnras/stx3181">https://doi.org/10.1093/mnras/stx3181</a>.
  ieee: N. Smith, Y. L. L. Götberg, and S. E. de Mink, “Extreme isolation of WN3/O3
    stars and implications for their evolutionary origin as the elusive stripped binaries,”
    <i>Monthly Notices of the Royal Astronomical Society</i>, vol. 475, no. 1. Oxford
    University Press, pp. 772–782, 2018.
  ista: Smith N, Götberg YLL, de Mink SE. 2018. Extreme isolation of WN3/O3 stars
    and implications for their evolutionary origin as the elusive stripped binaries.
    Monthly Notices of the Royal Astronomical Society. 475(1), 772–782.
  mla: Smith, Nathan, et al. “Extreme Isolation of WN3/O3 Stars and Implications for
    Their Evolutionary Origin as the Elusive Stripped Binaries.” <i>Monthly Notices
    of the Royal Astronomical Society</i>, vol. 475, no. 1, Oxford University Press,
    2018, pp. 772–82, doi:<a href="https://doi.org/10.1093/mnras/stx3181">10.1093/mnras/stx3181</a>.
  short: N. Smith, Y.L.L. Götberg, S.E. de Mink, Monthly Notices of the Royal Astronomical
    Society 475 (2018) 772–782.
date_created: 2023-08-03T10:14:47Z
date_published: 2018-03-01T00:00:00Z
date_updated: 2023-08-09T12:17:34Z
day: '01'
doi: 10.1093/mnras/stx3181
extern: '1'
external_id:
  arxiv:
  - '1704.03516'
intvolume: '       475'
issue: '1'
keyword:
- Space and Planetary Science
- Astronomy and Astrophysics
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://doi.org/10.1093/mnras/stx3181
month: '03'
oa: 1
oa_version: Published Version
page: 772-782
publication: Monthly Notices of the Royal Astronomical Society
publication_identifier:
  eissn:
  - 1365-2966
  issn:
  - 0035-8711
publication_status: published
publisher: Oxford University Press
quality_controlled: '1'
scopus_import: '1'
status: public
title: Extreme isolation of WN3/O3 stars and implications for their evolutionary origin
  as the elusive stripped binaries
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 475
year: '2018'
...
---
_id: '13475'
abstract:
- lang: eng
  text: Stars stripped of their hydrogen-rich envelope through interaction with a
    binary companion are generally not considered when accounting for ionizing radiation
    from stellar populations, despite the expectation that stripped stars emit hard
    ionizing radiation, form frequently, and live 10–100 times longer than single
    massive stars. We compute the first grid of evolutionary and spectral models specially
    made for stars stripped in binaries for a range of progenitor masses (2–20 M⊙)
    and metallicities ranging from solar to values representative for pop II stars.
    For stripped stars with masses in the range 0.3–7 M⊙, we find consistently high
    effective temperatures (20 000–100 000 K, increasing with mass), small radii (0.2–1
    R⊙), and high bolometric luminosities, comparable to that of their progenitor
    before stripping. The spectra show a continuous sequence that naturally bridges
    subdwarf-type stars at the low-mass end and Wolf-Rayet-like spectra at the high-mass
    end. For intermediate masses we find hybrid spectral classes showing a mixture
    of absorption and emission lines. These appear for stars with mass-loss rates
    of 10−8−10−6 M⊙ yr−1, which have semi-transparent atmospheres. At low metallicity,
    substantial hydrogen-rich layers are left at the surface and we predict spectra
    that resemble O-type stars instead. We obtain spectra undistinguishable from subdwarfs
    for stripped stars with masses up to 1.7 M⊙, which questions whether the widely
    adopted canonical value of 0.47 M⊙ is uniformly valid. Only a handful of stripped
    stars of intermediate mass have currently been identified observationally. Increasing
    this sample will provide necessary tests for the physics of interaction, internal
    mixing, and stellar winds. We use our model spectra to investigate the feasibility
    to detect stripped stars next to an optically bright companion and recommend systematic
    searches for their UV excess and possible emission lines, most notably HeII λ4686
    in the optical and HeII λ1640 in the UV. Our models are publicly available for
    further investigations or inclusion in spectral synthesis simulations.
article_number: A78
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Ylva Louise Linsdotter
  full_name: Götberg, Ylva Louise Linsdotter
  id: d0648d0c-0f64-11ee-a2e0-dd0faa2e4f7d
  last_name: Götberg
  orcid: 0000-0002-6960-6911
- first_name: S. E.
  full_name: de Mink, S. E.
  last_name: de Mink
- first_name: J. H.
  full_name: Groh, J. H.
  last_name: Groh
- first_name: T.
  full_name: Kupfer, T.
  last_name: Kupfer
- first_name: P. A.
  full_name: Crowther, P. A.
  last_name: Crowther
- first_name: E.
  full_name: Zapartas, E.
  last_name: Zapartas
- first_name: M.
  full_name: Renzo, M.
  last_name: Renzo
citation:
  ama: 'Götberg YLL, de Mink SE, Groh JH, et al. Spectral models for binary products:
    Unifying subdwarfs and Wolf-Rayet stars as a sequence of stripped-envelope stars.
    <i>Astronomy &#38;amp; Astrophysics</i>. 2018;615. doi:<a href="https://doi.org/10.1051/0004-6361/201732274">10.1051/0004-6361/201732274</a>'
  apa: 'Götberg, Y. L. L., de Mink, S. E., Groh, J. H., Kupfer, T., Crowther, P. A.,
    Zapartas, E., &#38; Renzo, M. (2018). Spectral models for binary products: Unifying
    subdwarfs and Wolf-Rayet stars as a sequence of stripped-envelope stars. <i>Astronomy
    &#38;amp; Astrophysics</i>. EDP Sciences. <a href="https://doi.org/10.1051/0004-6361/201732274">https://doi.org/10.1051/0004-6361/201732274</a>'
  chicago: 'Götberg, Ylva Louise Linsdotter, S. E. de Mink, J. H. Groh, T. Kupfer,
    P. A. Crowther, E. Zapartas, and M. Renzo. “Spectral Models for Binary Products:
    Unifying Subdwarfs and Wolf-Rayet Stars as a Sequence of Stripped-Envelope Stars.”
    <i>Astronomy &#38;amp; Astrophysics</i>. EDP Sciences, 2018. <a href="https://doi.org/10.1051/0004-6361/201732274">https://doi.org/10.1051/0004-6361/201732274</a>.'
  ieee: 'Y. L. L. Götberg <i>et al.</i>, “Spectral models for binary products: Unifying
    subdwarfs and Wolf-Rayet stars as a sequence of stripped-envelope stars,” <i>Astronomy
    &#38;amp; Astrophysics</i>, vol. 615. EDP Sciences, 2018.'
  ista: 'Götberg YLL, de Mink SE, Groh JH, Kupfer T, Crowther PA, Zapartas E, Renzo
    M. 2018. Spectral models for binary products: Unifying subdwarfs and Wolf-Rayet
    stars as a sequence of stripped-envelope stars. Astronomy &#38;amp; Astrophysics.
    615, A78.'
  mla: 'Götberg, Ylva Louise Linsdotter, et al. “Spectral Models for Binary Products:
    Unifying Subdwarfs and Wolf-Rayet Stars as a Sequence of Stripped-Envelope Stars.”
    <i>Astronomy &#38;amp; Astrophysics</i>, vol. 615, A78, EDP Sciences, 2018, doi:<a
    href="https://doi.org/10.1051/0004-6361/201732274">10.1051/0004-6361/201732274</a>.'
  short: Y.L.L. Götberg, S.E. de Mink, J.H. Groh, T. Kupfer, P.A. Crowther, E. Zapartas,
    M. Renzo, Astronomy &#38;amp; Astrophysics 615 (2018).
date_created: 2023-08-03T10:15:00Z
date_published: 2018-07-17T00:00:00Z
date_updated: 2023-08-09T11:22:17Z
day: '17'
doi: 10.1051/0004-6361/201732274
extern: '1'
external_id:
  arxiv:
  - '1802.03018'
intvolume: '       615'
keyword:
- Space and Planetary Science
- Astronomy and Astrophysics
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://doi.org/10.1051/0004-6361/201732274
month: '07'
oa: 1
oa_version: Published Version
publication: Astronomy &amp; Astrophysics
publication_identifier:
  eissn:
  - 1432-0746
  issn:
  - 0004-6361
publication_status: published
publisher: EDP Sciences
quality_controlled: '1'
scopus_import: '1'
status: public
title: 'Spectral models for binary products: Unifying subdwarfs and Wolf-Rayet stars
  as a sequence of stripped-envelope stars'
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 615
year: '2018'
...
---
_id: '135'
abstract:
- lang: eng
  text: The Fluid Implicit Particle method (FLIP) reduces numerical dissipation by
    combining particles with grids. To improve performance, the subsequent narrow
    band FLIP method (NB‐FLIP) uses a FLIP‐based fluid simulation only near the liquid
    surface and a traditional grid‐based fluid simulation away from the surface. This
    spatially‐limited FLIP simulation significantly reduces the number of particles
    and alleviates a computational bottleneck. In this paper, we extend the NB‐FLIP
    idea even further, by allowing a simulation to transition between a FLIP‐like
    fluid simulation and a grid‐based simulation in arbitrary locations, not just
    near the surface. This approach leads to even more savings in memory and computation,
    because we can concentrate the particles only in areas where they are needed.
    More importantly, this new method allows us to seamlessly transition to smooth
    implicit surface geometry wherever the particle‐based simulation is unnecessary.
    Consequently, our method leads to a practical algorithm for avoiding the noisy
    surface artifacts associated with particle‐based liquid simulations, while simultaneously
    maintaining the benefits of a FLIP simulation in regions of dynamic motion.
alternative_title:
- Eurographics
article_processing_charge: No
article_type: original
author:
- first_name: Takahiro
  full_name: Sato, Takahiro
  last_name: Sato
- first_name: Christopher J
  full_name: Wojtan, Christopher J
  id: 3C61F1D2-F248-11E8-B48F-1D18A9856A87
  last_name: Wojtan
  orcid: 0000-0001-6646-5546
- first_name: Nils
  full_name: Thuerey, Nils
  last_name: Thuerey
- first_name: Takeo
  full_name: Igarashi, Takeo
  last_name: Igarashi
- first_name: Ryoichi
  full_name: Ando, Ryoichi
  last_name: Ando
citation:
  ama: Sato T, Wojtan C, Thuerey N, Igarashi T, Ando R. Extended narrow band FLIP
    for liquid simulations. <i>Computer Graphics Forum</i>. 2018;37(2):169-177. doi:<a
    href="https://doi.org/10.1111/cgf.13351">10.1111/cgf.13351</a>
  apa: Sato, T., Wojtan, C., Thuerey, N., Igarashi, T., &#38; Ando, R. (2018). Extended
    narrow band FLIP for liquid simulations. <i>Computer Graphics Forum</i>. Wiley.
    <a href="https://doi.org/10.1111/cgf.13351">https://doi.org/10.1111/cgf.13351</a>
  chicago: Sato, Takahiro, Chris Wojtan, Nils Thuerey, Takeo Igarashi, and Ryoichi
    Ando. “Extended Narrow Band FLIP for Liquid Simulations.” <i>Computer Graphics
    Forum</i>. Wiley, 2018. <a href="https://doi.org/10.1111/cgf.13351">https://doi.org/10.1111/cgf.13351</a>.
  ieee: T. Sato, C. Wojtan, N. Thuerey, T. Igarashi, and R. Ando, “Extended narrow
    band FLIP for liquid simulations,” <i>Computer Graphics Forum</i>, vol. 37, no.
    2. Wiley, pp. 169–177, 2018.
  ista: Sato T, Wojtan C, Thuerey N, Igarashi T, Ando R. 2018. Extended narrow band
    FLIP for liquid simulations. Computer Graphics Forum. 37(2), 169–177.
  mla: Sato, Takahiro, et al. “Extended Narrow Band FLIP for Liquid Simulations.”
    <i>Computer Graphics Forum</i>, vol. 37, no. 2, Wiley, 2018, pp. 169–77, doi:<a
    href="https://doi.org/10.1111/cgf.13351">10.1111/cgf.13351</a>.
  short: T. Sato, C. Wojtan, N. Thuerey, T. Igarashi, R. Ando, Computer Graphics Forum
    37 (2018) 169–177.
date_created: 2018-12-11T11:44:49Z
date_published: 2018-05-22T00:00:00Z
date_updated: 2023-09-11T14:00:26Z
day: '22'
ddc:
- '006'
department:
- _id: ChWo
doi: 10.1111/cgf.13351
ec_funded: 1
external_id:
  isi:
  - '000434085600016'
file:
- access_level: open_access
  checksum: 8edb90da8a72395eb5d970580e0925b6
  content_type: application/pdf
  creator: wojtan
  date_created: 2020-10-08T08:38:23Z
  date_updated: 2020-10-08T08:38:23Z
  file_id: '8627'
  file_name: exnbflip.pdf
  file_size: 54309947
  relation: main_file
  success: 1
file_date_updated: 2020-10-08T08:38:23Z
has_accepted_license: '1'
intvolume: '        37'
isi: 1
issue: '2'
language:
- iso: eng
month: '05'
oa: 1
oa_version: Submitted Version
page: 169 - 177
project:
- _id: 2533E772-B435-11E9-9278-68D0E5697425
  call_identifier: H2020
  grant_number: '638176'
  name: Efficient Simulation of Natural Phenomena at Extremely Large Scales
publication: Computer Graphics Forum
publication_identifier:
  issn:
  - 0167-7055
publication_status: published
publisher: Wiley
quality_controlled: '1'
scopus_import: '1'
status: public
title: Extended narrow band FLIP for liquid simulations
type: journal_article
user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1
volume: 37
year: '2018'
...
---
_id: '136'
abstract:
- lang: eng
  text: Recent studies suggest that unstable, nonchaotic solutions of the Navier-Stokes
    equation may provide deep insights into fluid turbulence. In this article, we
    present a combined experimental and numerical study exploring the dynamical role
    of unstable equilibrium solutions and their invariant manifolds in a weakly turbulent,
    electromagnetically driven, shallow fluid layer. Identifying instants when turbulent
    evolution slows down, we compute 31 unstable equilibria of a realistic two-dimensional
    model of the flow. We establish the dynamical relevance of these unstable equilibria
    by showing that they are closely visited by the turbulent flow. We also establish
    the dynamical relevance of unstable manifolds by verifying that they are shadowed
    by turbulent trajectories departing from the neighborhoods of unstable equilibria
    over large distances in state space.
article_processing_charge: No
arxiv: 1
author:
- first_name: Balachandra
  full_name: Suri, Balachandra
  id: 47A5E706-F248-11E8-B48F-1D18A9856A87
  last_name: Suri
- first_name: Jeffrey
  full_name: Tithof, Jeffrey
  last_name: Tithof
- first_name: Roman
  full_name: Grigoriev, Roman
  last_name: Grigoriev
- first_name: Michael
  full_name: Schatz, Michael
  last_name: Schatz
citation:
  ama: Suri B, Tithof J, Grigoriev R, Schatz M. Unstable equilibria and invariant
    manifolds in quasi-two-dimensional Kolmogorov-like flow. <i>Physical Review E</i>.
    2018;98(2). doi:<a href="https://doi.org/10.1103/PhysRevE.98.023105">10.1103/PhysRevE.98.023105</a>
  apa: Suri, B., Tithof, J., Grigoriev, R., &#38; Schatz, M. (2018). Unstable equilibria
    and invariant manifolds in quasi-two-dimensional Kolmogorov-like flow. <i>Physical
    Review E</i>. American Physical Society. <a href="https://doi.org/10.1103/PhysRevE.98.023105">https://doi.org/10.1103/PhysRevE.98.023105</a>
  chicago: Suri, Balachandra, Jeffrey Tithof, Roman Grigoriev, and Michael Schatz.
    “Unstable Equilibria and Invariant Manifolds in Quasi-Two-Dimensional Kolmogorov-like
    Flow.” <i>Physical Review E</i>. American Physical Society, 2018. <a href="https://doi.org/10.1103/PhysRevE.98.023105">https://doi.org/10.1103/PhysRevE.98.023105</a>.
  ieee: B. Suri, J. Tithof, R. Grigoriev, and M. Schatz, “Unstable equilibria and
    invariant manifolds in quasi-two-dimensional Kolmogorov-like flow,” <i>Physical
    Review E</i>, vol. 98, no. 2. American Physical Society, 2018.
  ista: Suri B, Tithof J, Grigoriev R, Schatz M. 2018. Unstable equilibria and invariant
    manifolds in quasi-two-dimensional Kolmogorov-like flow. Physical Review E. 98(2).
  mla: Suri, Balachandra, et al. “Unstable Equilibria and Invariant Manifolds in Quasi-Two-Dimensional
    Kolmogorov-like Flow.” <i>Physical Review E</i>, vol. 98, no. 2, American Physical
    Society, 2018, doi:<a href="https://doi.org/10.1103/PhysRevE.98.023105">10.1103/PhysRevE.98.023105</a>.
  short: B. Suri, J. Tithof, R. Grigoriev, M. Schatz, Physical Review E 98 (2018).
date_created: 2018-12-11T11:44:49Z
date_published: 2018-08-13T00:00:00Z
date_updated: 2023-10-10T13:29:10Z
day: '13'
department:
- _id: BjHo
doi: 10.1103/PhysRevE.98.023105
external_id:
  arxiv:
  - '1808.02088'
  isi:
  - '000441466800010'
intvolume: '        98'
isi: 1
issue: '2'
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://arxiv.org/abs/1808.02088
month: '08'
oa: 1
oa_version: Submitted Version
publication: Physical Review E
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: Unstable equilibria and invariant manifolds in quasi-two-dimensional Kolmogorov-like
  flow
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 98
year: '2018'
...
---
_id: '137'
abstract:
- lang: eng
  text: Fluorescent sensors are an essential part of the experimental toolbox of the
    life sciences, where they are used ubiquitously to visualize intra- and extracellular
    signaling. In the brain, optical neurotransmitter sensors can shed light on temporal
    and spatial aspects of signal transmission by directly observing, for instance,
    neurotransmitter release and spread. Here we report the development and application
    of the first optical sensor for the amino acid glycine, which is both an inhibitory
    neurotransmitter and a co-agonist of the N-methyl-d-aspartate receptors (NMDARs)
    involved in synaptic plasticity. Computational design of a glycine-specific binding
    protein allowed us to produce the optical glycine FRET sensor (GlyFS), which can
    be used with single and two-photon excitation fluorescence microscopy. We took
    advantage of this newly developed sensor to test predictions about the uneven
    spatial distribution of glycine in extracellular space and to demonstrate that
    extracellular glycine levels are controlled by plasticity-inducing stimuli.
article_processing_charge: No
article_type: original
author:
- first_name: William
  full_name: Zhang, William
  last_name: Zhang
- first_name: Michel
  full_name: Herde, Michel
  last_name: Herde
- first_name: Joshua
  full_name: Mitchell, Joshua
  last_name: Mitchell
- first_name: Jason
  full_name: Whitfield, Jason
  last_name: Whitfield
- first_name: Andreas
  full_name: Wulff, Andreas
  last_name: Wulff
- first_name: Vanessa
  full_name: Vongsouthi, Vanessa
  last_name: Vongsouthi
- first_name: Inmaculada
  full_name: Sanchez Romero, Inmaculada
  id: 3D9C5D30-F248-11E8-B48F-1D18A9856A87
  last_name: Sanchez Romero
- first_name: Polina
  full_name: Gulakova, Polina
  last_name: Gulakova
- first_name: Daniel
  full_name: Minge, Daniel
  last_name: Minge
- first_name: Björn
  full_name: Breithausen, Björn
  last_name: Breithausen
- first_name: Susanne
  full_name: Schoch, Susanne
  last_name: Schoch
- first_name: Harald L
  full_name: Janovjak, Harald L
  id: 33BA6C30-F248-11E8-B48F-1D18A9856A87
  last_name: Janovjak
  orcid: 0000-0002-8023-9315
- first_name: Colin
  full_name: Jackson, Colin
  last_name: Jackson
- first_name: Christian
  full_name: Henneberger, Christian
  last_name: Henneberger
citation:
  ama: Zhang W, Herde M, Mitchell J, et al. Monitoring hippocampal glycine with the
    computationally designed optical sensor GlyFS. <i>Nature Chemical Biology</i>.
    2018;14(9):861-869. doi:<a href="https://doi.org/10.1038/s41589-018-0108-2">10.1038/s41589-018-0108-2</a>
  apa: Zhang, W., Herde, M., Mitchell, J., Whitfield, J., Wulff, A., Vongsouthi, V.,
    … Henneberger, C. (2018). Monitoring hippocampal glycine with the computationally
    designed optical sensor GlyFS. <i>Nature Chemical Biology</i>. Nature Publishing
    Group. <a href="https://doi.org/10.1038/s41589-018-0108-2">https://doi.org/10.1038/s41589-018-0108-2</a>
  chicago: Zhang, William, Michel Herde, Joshua Mitchell, Jason Whitfield, Andreas
    Wulff, Vanessa Vongsouthi, Inmaculada Sanchez-Romero, et al. “Monitoring Hippocampal
    Glycine with the Computationally Designed Optical Sensor GlyFS.” <i>Nature Chemical
    Biology</i>. Nature Publishing Group, 2018. <a href="https://doi.org/10.1038/s41589-018-0108-2">https://doi.org/10.1038/s41589-018-0108-2</a>.
  ieee: W. Zhang <i>et al.</i>, “Monitoring hippocampal glycine with the computationally
    designed optical sensor GlyFS,” <i>Nature Chemical Biology</i>, vol. 14, no. 9.
    Nature Publishing Group, pp. 861–869, 2018.
  ista: Zhang W, Herde M, Mitchell J, Whitfield J, Wulff A, Vongsouthi V, Sanchez-Romero
    I, Gulakova P, Minge D, Breithausen B, Schoch S, Janovjak HL, Jackson C, Henneberger
    C. 2018. Monitoring hippocampal glycine with the computationally designed optical
    sensor GlyFS. Nature Chemical Biology. 14(9), 861–869.
  mla: Zhang, William, et al. “Monitoring Hippocampal Glycine with the Computationally
    Designed Optical Sensor GlyFS.” <i>Nature Chemical Biology</i>, vol. 14, no. 9,
    Nature Publishing Group, 2018, pp. 861–69, doi:<a href="https://doi.org/10.1038/s41589-018-0108-2">10.1038/s41589-018-0108-2</a>.
  short: W. Zhang, M. Herde, J. Mitchell, J. Whitfield, A. Wulff, V. Vongsouthi, I.
    Sanchez-Romero, P. Gulakova, D. Minge, B. Breithausen, S. Schoch, H.L. Janovjak,
    C. Jackson, C. Henneberger, Nature Chemical Biology 14 (2018) 861–869.
date_created: 2018-12-11T11:44:49Z
date_published: 2018-07-30T00:00:00Z
date_updated: 2023-09-13T08:58:05Z
day: '30'
department:
- _id: HaJa
doi: 10.1038/s41589-018-0108-2
external_id:
  isi:
  - '000442174500013'
  pmid:
  - '30061718 '
intvolume: '        14'
isi: 1
issue: '9'
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://www.ncbi.nlm.nih.gov/pubmed/30061718
month: '07'
oa: 1
oa_version: Submitted Version
page: 861 - 869
pmid: 1
project:
- _id: 255BFFFA-B435-11E9-9278-68D0E5697425
  grant_number: RGY0084/2012
  name: In situ real-time imaging of neurotransmitter signaling using designer optical
    sensors (HFSP Young Investigator)
publication: Nature Chemical Biology
publication_status: published
publisher: Nature Publishing Group
publist_id: '7786'
quality_controlled: '1'
scopus_import: '1'
status: public
title: Monitoring hippocampal glycine with the computationally designed optical sensor
  GlyFS
type: journal_article
user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1
volume: 14
year: '2018'
...
---
_id: '139'
abstract:
- lang: eng
  text: 'Genome-scale diversity data are increasingly available in a variety of biological
    systems, and can be used to reconstruct the past evolutionary history of species
    divergence. However, extracting the full demographic information from these data
    is not trivial, and requires inferential methods that account for the diversity
    of coalescent histories throughout the genome. Here, we evaluate the potential
    and limitations of one such approach. We reexamine a well-known system of mussel
    sister species, using the joint site frequency spectrum (jSFS) of synonymousmutations
    computed either fromexome capture or RNA-seq, in an Approximate Bayesian Computation
    (ABC) framework. We first assess the best sampling strategy (number of: individuals,
    loci, and bins in the jSFS), and show that model selection is robust to variation
    in the number of individuals and loci. In contrast, different binning choices
    when summarizing the jSFS, strongly affect the results: including classes of low
    and high frequency shared polymorphisms can more effectively reveal recent migration
    events. We then take advantage of the flexibility of ABC to compare more realistic
    models of speciation, including variation in migration rates through time (i.e.,
    periodic connectivity) and across genes (i.e., genome-wide heterogeneity in migration
    rates). We show that these models were consistently selected as the most probable,
    suggesting that mussels have experienced a complex history of gene flow during
    divergence and that the species boundary is semi-permeable. Our work provides
    a comprehensive evaluation of ABC demographic inference in mussels based on the
    coding jSFS, and supplies guidelines for employing different sequencing techniques
    and sampling strategies. We emphasize, perhaps surprisingly, that inferences are
    less limited by the volume of data, than by the way in which they are analyzed.'
article_number: '30083438'
article_processing_charge: No
author:
- first_name: Christelle
  full_name: Fraisse, Christelle
  id: 32DF5794-F248-11E8-B48F-1D18A9856A87
  last_name: Fraisse
  orcid: 0000-0001-8441-5075
- first_name: Camille
  full_name: Roux, Camille
  last_name: Roux
- first_name: Pierre
  full_name: Gagnaire, Pierre
  last_name: Gagnaire
- first_name: Jonathan
  full_name: Romiguier, Jonathan
  last_name: Romiguier
- first_name: Nicolas
  full_name: Faivre, Nicolas
  last_name: Faivre
- first_name: John
  full_name: Welch, John
  last_name: Welch
- first_name: Nicolas
  full_name: Bierne, Nicolas
  last_name: Bierne
citation:
  ama: 'Fraisse C, Roux C, Gagnaire P, et al. The divergence history of European blue
    mussel species reconstructed from Approximate Bayesian Computation: The effects
    of sequencing techniques and sampling strategies. <i>PeerJ</i>. 2018;2018(7).
    doi:<a href="https://doi.org/10.7717/peerj.5198">10.7717/peerj.5198</a>'
  apa: 'Fraisse, C., Roux, C., Gagnaire, P., Romiguier, J., Faivre, N., Welch, J.,
    &#38; Bierne, N. (2018). The divergence history of European blue mussel species
    reconstructed from Approximate Bayesian Computation: The effects of sequencing
    techniques and sampling strategies. <i>PeerJ</i>. PeerJ. <a href="https://doi.org/10.7717/peerj.5198">https://doi.org/10.7717/peerj.5198</a>'
  chicago: 'Fraisse, Christelle, Camille Roux, Pierre Gagnaire, Jonathan Romiguier,
    Nicolas Faivre, John Welch, and Nicolas Bierne. “The Divergence History of European
    Blue Mussel Species Reconstructed from Approximate Bayesian Computation: The Effects
    of Sequencing Techniques and Sampling Strategies.” <i>PeerJ</i>. PeerJ, 2018.
    <a href="https://doi.org/10.7717/peerj.5198">https://doi.org/10.7717/peerj.5198</a>.'
  ieee: 'C. Fraisse <i>et al.</i>, “The divergence history of European blue mussel
    species reconstructed from Approximate Bayesian Computation: The effects of sequencing
    techniques and sampling strategies,” <i>PeerJ</i>, vol. 2018, no. 7. PeerJ, 2018.'
  ista: 'Fraisse C, Roux C, Gagnaire P, Romiguier J, Faivre N, Welch J, Bierne N.
    2018. The divergence history of European blue mussel species reconstructed from
    Approximate Bayesian Computation: The effects of sequencing techniques and sampling
    strategies. PeerJ. 2018(7), 30083438.'
  mla: 'Fraisse, Christelle, et al. “The Divergence History of European Blue Mussel
    Species Reconstructed from Approximate Bayesian Computation: The Effects of Sequencing
    Techniques and Sampling Strategies.” <i>PeerJ</i>, vol. 2018, no. 7, 30083438,
    PeerJ, 2018, doi:<a href="https://doi.org/10.7717/peerj.5198">10.7717/peerj.5198</a>.'
  short: C. Fraisse, C. Roux, P. Gagnaire, J. Romiguier, N. Faivre, J. Welch, N. Bierne,
    PeerJ 2018 (2018).
date_created: 2018-12-11T11:44:50Z
date_published: 2018-07-30T00:00:00Z
date_updated: 2023-10-17T12:25:28Z
day: '30'
ddc:
- '576'
department:
- _id: BeVi
- _id: NiBa
doi: 10.7717/peerj.5198
external_id:
  isi:
  - '000440484800002'
file:
- access_level: open_access
  checksum: 7d55ae22598a1c70759cd671600cff53
  content_type: application/pdf
  creator: dernst
  date_created: 2018-12-18T09:42:11Z
  date_updated: 2020-07-14T12:44:48Z
  file_id: '5739'
  file_name: 2018_PeerJ_Fraisse.pdf
  file_size: 1480792
  relation: main_file
file_date_updated: 2020-07-14T12:44:48Z
has_accepted_license: '1'
intvolume: '      2018'
isi: 1
issue: '7'
language:
- iso: eng
license: https://creativecommons.org/licenses/by/4.0/
month: '07'
oa: 1
oa_version: Published Version
publication: PeerJ
publication_status: published
publisher: PeerJ
publist_id: '7784'
quality_controlled: '1'
scopus_import: '1'
status: public
title: 'The divergence history of European blue mussel species reconstructed from
  Approximate Bayesian Computation: The effects of sequencing techniques and sampling
  strategies'
tmp:
  image: /images/cc_by.png
  legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
  name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
  short: CC BY (4.0)
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 2018
year: '2018'
...
---
_id: '14'
abstract:
- lang: eng
  text: The intercellular transport of auxin is driven by PIN-formed (PIN) auxin efflux
    carriers. PINs are localized at the plasma membrane (PM) and on constitutively
    recycling endomembrane vesicles. Therefore, PINs can mediate auxin transport either
    by direct translocation across the PM or by pumping auxin into secretory vesicles
    (SVs), leading to its secretory release upon fusion with the PM. Which of these
    two mechanisms dominates is a matter of debate. Here, we addressed the issue with
    a mathematical modeling approach. We demonstrate that the efficiency of secretory
    transport depends on SV size, half-life of PINs on the PM, pH, exocytosis frequency
    and PIN density. 3D structured illumination microscopy (SIM) was used to determine
    PIN density on the PM. Combining this data with published values of the other
    parameters, we show that the transport activity of PINs in SVs would have to be
    at least 1000× greater than on the PM in order to produce a comparable macroscopic
    auxin transport. If both transport mechanisms operated simultaneously and PINs
    were equally active on SVs and PM, the contribution of secretion to the total
    auxin flux would be negligible. In conclusion, while secretory vesicle-mediated
    transport of auxin is an intriguing and theoretically possible model, it is unlikely
    to be a major mechanism of auxin transport inplanta.
acknowledgement: 'European Research Council (ERC): 742985 to Jiri Friml; M.A. was
  supported by the Austrian Science Fund (FWF) (M2379-B28); AJ was supported by the
  Austria Science Fund (FWF): I03630 to Jiri Friml.'
article_processing_charge: No
article_type: original
author:
- first_name: Sander
  full_name: Hille, Sander
  last_name: Hille
- first_name: Maria
  full_name: Akhmanova, Maria
  id: 3425EC26-F248-11E8-B48F-1D18A9856A87
  last_name: Akhmanova
  orcid: 0000-0003-1522-3162
- first_name: Matous
  full_name: Glanc, Matous
  id: 1AE1EA24-02D0-11E9-9BAA-DAF4881429F2
  last_name: Glanc
  orcid: 0000-0003-0619-7783
- first_name: Alexander J
  full_name: Johnson, Alexander J
  id: 46A62C3A-F248-11E8-B48F-1D18A9856A87
  last_name: Johnson
  orcid: 0000-0002-2739-8843
- first_name: Jirí
  full_name: Friml, Jirí
  id: 4159519E-F248-11E8-B48F-1D18A9856A87
  last_name: Friml
  orcid: 0000-0002-8302-7596
citation:
  ama: 'Hille S, Akhmanova M, Glanc M, Johnson AJ, Friml J. Relative contribution
    of PIN-containing secretory vesicles and plasma membrane PINs to the directed
    auxin transport: Theoretical estimation. <i>International Journal of Molecular
    Sciences</i>. 2018;19(11). doi:<a href="https://doi.org/10.3390/ijms19113566">10.3390/ijms19113566</a>'
  apa: 'Hille, S., Akhmanova, M., Glanc, M., Johnson, A. J., &#38; Friml, J. (2018).
    Relative contribution of PIN-containing secretory vesicles and plasma membrane
    PINs to the directed auxin transport: Theoretical estimation. <i>International
    Journal of Molecular Sciences</i>. MDPI. <a href="https://doi.org/10.3390/ijms19113566">https://doi.org/10.3390/ijms19113566</a>'
  chicago: 'Hille, Sander, Maria Akhmanova, Matous Glanc, Alexander J Johnson, and
    Jiří Friml. “Relative Contribution of PIN-Containing Secretory Vesicles and Plasma
    Membrane PINs to the Directed Auxin Transport: Theoretical Estimation.” <i>International
    Journal of Molecular Sciences</i>. MDPI, 2018. <a href="https://doi.org/10.3390/ijms19113566">https://doi.org/10.3390/ijms19113566</a>.'
  ieee: 'S. Hille, M. Akhmanova, M. Glanc, A. J. Johnson, and J. Friml, “Relative
    contribution of PIN-containing secretory vesicles and plasma membrane PINs to
    the directed auxin transport: Theoretical estimation,” <i>International Journal
    of Molecular Sciences</i>, vol. 19, no. 11. MDPI, 2018.'
  ista: 'Hille S, Akhmanova M, Glanc M, Johnson AJ, Friml J. 2018. Relative contribution
    of PIN-containing secretory vesicles and plasma membrane PINs to the directed
    auxin transport: Theoretical estimation. International Journal of Molecular Sciences.
    19(11).'
  mla: 'Hille, Sander, et al. “Relative Contribution of PIN-Containing Secretory Vesicles
    and Plasma Membrane PINs to the Directed Auxin Transport: Theoretical Estimation.”
    <i>International Journal of Molecular Sciences</i>, vol. 19, no. 11, MDPI, 2018,
    doi:<a href="https://doi.org/10.3390/ijms19113566">10.3390/ijms19113566</a>.'
  short: S. Hille, M. Akhmanova, M. Glanc, A.J. Johnson, J. Friml, International Journal
    of Molecular Sciences 19 (2018).
date_created: 2018-12-11T11:44:09Z
date_published: 2018-11-12T00:00:00Z
date_updated: 2023-09-18T08:09:32Z
day: '12'
ddc:
- '580'
department:
- _id: DaSi
- _id: JiFr
doi: 10.3390/ijms19113566
ec_funded: 1
external_id:
  isi:
  - '000451528500282'
file:
- access_level: open_access
  checksum: e4b59c2599b0ca26ebf5b8434bcde94a
  content_type: application/pdf
  creator: dernst
  date_created: 2018-12-17T16:04:11Z
  date_updated: 2020-07-14T12:44:50Z
  file_id: '5719'
  file_name: 2018_IJMS_Hille.pdf
  file_size: 2200593
  relation: main_file
file_date_updated: 2020-07-14T12:44:50Z
has_accepted_license: '1'
intvolume: '        19'
isi: 1
issue: '11'
language:
- iso: eng
month: '11'
oa: 1
oa_version: Published Version
project:
- _id: 261099A6-B435-11E9-9278-68D0E5697425
  call_identifier: H2020
  grant_number: '742985'
  name: Tracing Evolution of Auxin Transport and Polarity in Plants
- _id: 26538374-B435-11E9-9278-68D0E5697425
  call_identifier: FWF
  grant_number: I03630
  name: Molecular mechanisms of endocytic cargo recognition in plants
publication: International Journal of Molecular Sciences
publication_identifier:
  eissn:
  - 1422-0067
publication_status: published
publisher: MDPI
publist_id: '8042'
quality_controlled: '1'
scopus_import: '1'
status: public
title: 'Relative contribution of PIN-containing secretory vesicles and plasma membrane
  PINs to the directed auxin transport: Theoretical estimation'
tmp:
  image: /images/cc_by.png
  legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
  name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
  short: CC BY (4.0)
type: journal_article
user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1
volume: 19
year: '2018'
...
---
_id: '140'
abstract:
- lang: eng
  text: Reachability analysis is difficult for hybrid automata with affine differential
    equations, because the reach set needs to be approximated. Promising abstraction
    techniques usually employ interval methods or template polyhedra. Interval methods
    account for dense time and guarantee soundness, and there are interval-based tools
    that overapproximate affine flowpipes. But interval methods impose bounded and
    rigid shapes, which make refinement expensive and fixpoint detection difficult.
    Template polyhedra, on the other hand, can be adapted flexibly and can be unbounded,
    but sound template refinement for unbounded reachability analysis has been implemented
    only for systems with piecewise constant dynamics. We capitalize on the advantages
    of both techniques, combining interval arithmetic and template polyhedra, using
    the former to abstract time and the latter to abstract space. During a CEGAR loop,
    whenever a spurious error trajectory is found, we compute additional space constraints
    and split time intervals, and use these space-time interpolants to eliminate the
    counterexample. Space-time interpolation offers a lazy, flexible framework for
    increasing precision while guaranteeing soundness, both for error avoidance and
    fixpoint detection. To the best of out knowledge, this is the first abstraction
    refinement scheme for the reachability analysis over unbounded and dense time
    of affine hybrid systems, which is both sound and automatic. We demonstrate the
    effectiveness of our algorithm with several benchmark examples, which cannot be
    handled by other tools.
alternative_title:
- LNCS
article_processing_charge: No
author:
- first_name: Goran
  full_name: Frehse, Goran
  last_name: Frehse
- first_name: Mirco
  full_name: Giacobbe, Mirco
  id: 3444EA5E-F248-11E8-B48F-1D18A9856A87
  last_name: Giacobbe
  orcid: 0000-0001-8180-0904
- first_name: Thomas A
  full_name: Henzinger, Thomas A
  id: 40876CD8-F248-11E8-B48F-1D18A9856A87
  last_name: Henzinger
  orcid: 0000−0002−2985−7724
citation:
  ama: 'Frehse G, Giacobbe M, Henzinger TA. Space-time interpolants. In: Vol 10981.
    Springer; 2018:468-486. doi:<a href="https://doi.org/10.1007/978-3-319-96145-3_25">10.1007/978-3-319-96145-3_25</a>'
  apa: 'Frehse, G., Giacobbe, M., &#38; Henzinger, T. A. (2018). Space-time interpolants
    (Vol. 10981, pp. 468–486). Presented at the CAV: Computer Aided Verification,
    Oxford, United Kingdom: Springer. <a href="https://doi.org/10.1007/978-3-319-96145-3_25">https://doi.org/10.1007/978-3-319-96145-3_25</a>'
  chicago: Frehse, Goran, Mirco Giacobbe, and Thomas A Henzinger. “Space-Time Interpolants,”
    10981:468–86. Springer, 2018. <a href="https://doi.org/10.1007/978-3-319-96145-3_25">https://doi.org/10.1007/978-3-319-96145-3_25</a>.
  ieee: 'G. Frehse, M. Giacobbe, and T. A. Henzinger, “Space-time interpolants,” presented
    at the CAV: Computer Aided Verification, Oxford, United Kingdom, 2018, vol. 10981,
    pp. 468–486.'
  ista: 'Frehse G, Giacobbe M, Henzinger TA. 2018. Space-time interpolants. CAV: Computer
    Aided Verification, LNCS, vol. 10981, 468–486.'
  mla: Frehse, Goran, et al. <i>Space-Time Interpolants</i>. Vol. 10981, Springer,
    2018, pp. 468–86, doi:<a href="https://doi.org/10.1007/978-3-319-96145-3_25">10.1007/978-3-319-96145-3_25</a>.
  short: G. Frehse, M. Giacobbe, T.A. Henzinger, in:, Springer, 2018, pp. 468–486.
conference:
  end_date: 2018-07-17
  location: Oxford, United Kingdom
  name: 'CAV: Computer Aided Verification'
  start_date: 2018-07-14
date_created: 2018-12-11T11:44:50Z
date_published: 2018-07-18T00:00:00Z
date_updated: 2023-09-19T09:30:43Z
day: '18'
ddc:
- '005'
department:
- _id: ToHe
doi: 10.1007/978-3-319-96145-3_25
external_id:
  isi:
  - '000491481600025'
file:
- access_level: open_access
  checksum: 6dca832f575d6b3f0ea9dff56f579142
  content_type: application/pdf
  creator: system
  date_created: 2018-12-12T10:17:53Z
  date_updated: 2020-07-14T12:44:50Z
  file_id: '5310'
  file_name: IST-2018-1010-v1+1_space-time_interpolants.pdf
  file_size: 563710
  relation: main_file
file_date_updated: 2020-07-14T12:44:50Z
has_accepted_license: '1'
intvolume: '     10981'
isi: 1
language:
- iso: eng
month: '07'
oa: 1
oa_version: Published Version
page: 468 - 486
project:
- _id: 25832EC2-B435-11E9-9278-68D0E5697425
  call_identifier: FWF
  grant_number: S 11407_N23
  name: Rigorous Systems Engineering
- _id: 25F5A88A-B435-11E9-9278-68D0E5697425
  call_identifier: FWF
  grant_number: S11402-N23
  name: Moderne Concurrency Paradigms
publication_identifier:
  issn:
  - '03029743'
publication_status: published
publisher: Springer
publist_id: '7783'
pubrep_id: '1010'
quality_controlled: '1'
related_material:
  record:
  - id: '6894'
    relation: dissertation_contains
    status: public
scopus_import: '1'
status: public
title: Space-time interpolants
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: conference
user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1
volume: 10981
year: '2018'
...
---
_id: '14003'
abstract:
- lang: eng
  text: "Molecular chirality plays an essential role in most biochemical processes.
    The observation and quantification of chirality-sensitive signals, however, remains
    extremely challenging, especially on ultrafast timescales and in dilute media.
    Here, we describe the experimental realization of an all-optical and ultrafast
    scheme for detecting chiral dynamics in molecules. This technique is based on
    high-harmonic generation by a combination of two-color counterrotating femtosecond
    laser pulses with polarization states tunable from linear to circular. We demonstrate
    two different implementations of chiral-sensitive high-harmonic spectroscopy on
    an ensemble of randomly oriented methyloxirane molecules in the gas phase. Using
    two elliptically polarized fields, we observe that the ellipticities maximizing
    the harmonic signal reach up to \r\n4.4\r\n±\r\n0.2\r\n%\r\n (at 17.6 eV). Using
    two circularly polarized fields, we observe circular dichroisms ranging up to
    \r\n13\r\n±\r\n6\r\n%\r\n (28.3–33.1 eV). Our theoretical analysis confirms that
    the observed chiral response originates from subfemtosecond electron dynamics
    driven by the magnetic component of the driving laser field. This assignment is
    supported by the experimental observation of a strong intensity dependence of
    the chiral effects and its agreement with theory. We moreover report and explain
    a pronounced variation of the signal strength and dichroism with the driving-field
    ellipticities and harmonic orders. Finally, we demonstrate the sensitivity of
    the experimental observables to the shape of the electron hole. This technique
    for chiral discrimination will yield femtosecond temporal resolution when integrated
    in a pump-probe scheme and subfemtosecond resolution on chiral charge migration
    in a self-probing scheme."
article_number: '031060'
article_processing_charge: No
article_type: original
author:
- first_name: Denitsa Rangelova
  full_name: Baykusheva, Denitsa Rangelova
  id: 71b4d059-2a03-11ee-914d-dfa3beed6530
  last_name: Baykusheva
- first_name: Hans Jakob
  full_name: Wörner, Hans Jakob
  last_name: Wörner
citation:
  ama: Baykusheva DR, Wörner HJ. Chiral discrimination through bielliptical high-harmonic
    spectroscopy. <i>Physical Review X</i>. 2018;8(3). doi:<a href="https://doi.org/10.1103/physrevx.8.031060">10.1103/physrevx.8.031060</a>
  apa: Baykusheva, D. R., &#38; Wörner, H. J. (2018). Chiral discrimination through
    bielliptical high-harmonic spectroscopy. <i>Physical Review X</i>. American Physical
    Society. <a href="https://doi.org/10.1103/physrevx.8.031060">https://doi.org/10.1103/physrevx.8.031060</a>
  chicago: Baykusheva, Denitsa Rangelova, and Hans Jakob Wörner. “Chiral Discrimination
    through Bielliptical High-Harmonic Spectroscopy.” <i>Physical Review X</i>. American
    Physical Society, 2018. <a href="https://doi.org/10.1103/physrevx.8.031060">https://doi.org/10.1103/physrevx.8.031060</a>.
  ieee: D. R. Baykusheva and H. J. Wörner, “Chiral discrimination through bielliptical
    high-harmonic spectroscopy,” <i>Physical Review X</i>, vol. 8, no. 3. American
    Physical Society, 2018.
  ista: Baykusheva DR, Wörner HJ. 2018. Chiral discrimination through bielliptical
    high-harmonic spectroscopy. Physical Review X. 8(3), 031060.
  mla: Baykusheva, Denitsa Rangelova, and Hans Jakob Wörner. “Chiral Discrimination
    through Bielliptical High-Harmonic Spectroscopy.” <i>Physical Review X</i>, vol.
    8, no. 3, 031060, American Physical Society, 2018, doi:<a href="https://doi.org/10.1103/physrevx.8.031060">10.1103/physrevx.8.031060</a>.
  short: D.R. Baykusheva, H.J. Wörner, Physical Review X 8 (2018).
date_created: 2023-08-10T06:34:48Z
date_published: 2018-07-01T00:00:00Z
date_updated: 2023-08-22T07:42:07Z
day: '01'
doi: 10.1103/physrevx.8.031060
extern: '1'
intvolume: '         8'
issue: '3'
keyword:
- General Physics and Astronomy
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://doi.org/10.1103/PhysRevX.8.031060
month: '07'
oa: 1
oa_version: Published Version
publication: Physical Review X
publication_identifier:
  eissn:
  - 2160-3308
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: Chiral discrimination through bielliptical high-harmonic spectroscopy
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 8
year: '2018'
...
---
_id: '141'
abstract:
- lang: eng
  text: 'Given a model and a specification, the fundamental model-checking problem
    asks for algorithmic verification of whether the model satisfies the specification.
    We consider graphs and Markov decision processes (MDPs), which are fundamental
    models for reactive systems. One of the very basic specifications that arise in
    verification of reactive systems is the strong fairness (aka Streett) objective.
    Given different types of requests and corresponding grants, the objective requires
    that for each type, if the request event happens infinitely often, then the corresponding
    grant event must also happen infinitely often. All ω -regular objectives can be
    expressed as Streett objectives and hence they are canonical in verification.
    To handle the state-space explosion, symbolic algorithms are required that operate
    on a succinct implicit representation of the system rather than explicitly accessing
    the system. While explicit algorithms for graphs and MDPs with Streett objectives
    have been widely studied, there has been no improvement of the basic symbolic
    algorithms. The worst-case numbers of symbolic steps required for the basic symbolic
    algorithms are as follows: quadratic for graphs and cubic for MDPs. In this work
    we present the first sub-quadratic symbolic algorithm for graphs with Streett
    objectives, and our algorithm is sub-quadratic even for MDPs. Based on our algorithmic
    insights we present an implementation of the new symbolic approach and show that
    it improves the existing approach on several academic benchmark examples.'
acknowledgement: 'Acknowledgements. K. C. and M. H. are partially supported by the
  Vienna Science and Technology Fund (WWTF) grant ICT15-003. K. C. is partially supported
  by the Austrian Science Fund (FWF): S11407-N23 (RiSE/SHiNE), and an ERC Start Grant
  (279307: Graph Games). V. T. is partially supported by the European Union’s Horizon
  2020 research and innovation programme under the Marie Sk lodowska-Curie Grant Agreement
  No. 665385.'
alternative_title:
- LNCS
article_processing_charge: No
author:
- first_name: Krishnendu
  full_name: Chatterjee, Krishnendu
  id: 2E5DCA20-F248-11E8-B48F-1D18A9856A87
  last_name: Chatterjee
  orcid: 0000-0002-4561-241X
- first_name: Monika H
  full_name: Henzinger, Monika H
  id: 540c9bbd-f2de-11ec-812d-d04a5be85630
  last_name: Henzinger
  orcid: 0000-0002-5008-6530
- first_name: Veronika
  full_name: Loitzenbauer, Veronika
  last_name: Loitzenbauer
- first_name: Simin
  full_name: Oraee, Simin
  last_name: Oraee
- first_name: Viktor
  full_name: Toman, Viktor
  id: 3AF3DA7C-F248-11E8-B48F-1D18A9856A87
  last_name: Toman
  orcid: 0000-0001-9036-063X
citation:
  ama: 'Chatterjee K, Henzinger MH, Loitzenbauer V, Oraee S, Toman V. Symbolic algorithms
    for graphs and Markov decision processes with fairness objectives. In: Vol 10982.
    Springer; 2018:178-197. doi:<a href="https://doi.org/10.1007/978-3-319-96142-2_13">10.1007/978-3-319-96142-2_13</a>'
  apa: 'Chatterjee, K., Henzinger, M. H., Loitzenbauer, V., Oraee, S., &#38; Toman,
    V. (2018). Symbolic algorithms for graphs and Markov decision processes with fairness
    objectives (Vol. 10982, pp. 178–197). Presented at the CAV: Computer Aided Verification,
    Oxford, United Kingdom: Springer. <a href="https://doi.org/10.1007/978-3-319-96142-2_13">https://doi.org/10.1007/978-3-319-96142-2_13</a>'
  chicago: Chatterjee, Krishnendu, Monika H Henzinger, Veronika Loitzenbauer, Simin
    Oraee, and Viktor Toman. “Symbolic Algorithms for Graphs and Markov Decision Processes
    with Fairness Objectives,” 10982:178–97. Springer, 2018. <a href="https://doi.org/10.1007/978-3-319-96142-2_13">https://doi.org/10.1007/978-3-319-96142-2_13</a>.
  ieee: 'K. Chatterjee, M. H. Henzinger, V. Loitzenbauer, S. Oraee, and V. Toman,
    “Symbolic algorithms for graphs and Markov decision processes with fairness objectives,”
    presented at the CAV: Computer Aided Verification, Oxford, United Kingdom, 2018,
    vol. 10982, pp. 178–197.'
  ista: 'Chatterjee K, Henzinger MH, Loitzenbauer V, Oraee S, Toman V. 2018. Symbolic
    algorithms for graphs and Markov decision processes with fairness objectives.
    CAV: Computer Aided Verification, LNCS, vol. 10982, 178–197.'
  mla: Chatterjee, Krishnendu, et al. <i>Symbolic Algorithms for Graphs and Markov
    Decision Processes with Fairness Objectives</i>. Vol. 10982, Springer, 2018, pp.
    178–97, doi:<a href="https://doi.org/10.1007/978-3-319-96142-2_13">10.1007/978-3-319-96142-2_13</a>.
  short: K. Chatterjee, M.H. Henzinger, V. Loitzenbauer, S. Oraee, V. Toman, in:,
    Springer, 2018, pp. 178–197.
conference:
  end_date: 2018-07-17
  location: Oxford, United Kingdom
  name: 'CAV: Computer Aided Verification'
  start_date: 2018-07-14
date_created: 2018-12-11T11:44:51Z
date_published: 2018-07-18T00:00:00Z
date_updated: 2025-07-14T09:10:15Z
day: '18'
ddc:
- '000'
department:
- _id: KrCh
doi: 10.1007/978-3-319-96142-2_13
ec_funded: 1
external_id:
  isi:
  - '000491469700013'
file:
- access_level: open_access
  checksum: 1a6ffa4febe8bb8ac28be3adb3eafebc
  content_type: application/pdf
  creator: dernst
  date_created: 2018-12-18T08:52:38Z
  date_updated: 2020-07-14T12:44:53Z
  file_id: '5737'
  file_name: 2018_LNCS_Chatterjee.pdf
  file_size: 675606
  relation: main_file
file_date_updated: 2020-07-14T12:44:53Z
has_accepted_license: '1'
intvolume: '     10982'
isi: 1
language:
- iso: eng
month: '07'
oa: 1
oa_version: Published Version
page: 178-197
project:
- _id: 2581B60A-B435-11E9-9278-68D0E5697425
  call_identifier: FP7
  grant_number: '279307'
  name: 'Quantitative Graph Games: Theory and Applications'
- _id: 25892FC0-B435-11E9-9278-68D0E5697425
  grant_number: ICT15-003
  name: Efficient Algorithms for Computer Aided Verification
- _id: 25832EC2-B435-11E9-9278-68D0E5697425
  call_identifier: FWF
  grant_number: S 11407_N23
  name: Rigorous Systems Engineering
- _id: 2564DBCA-B435-11E9-9278-68D0E5697425
  call_identifier: H2020
  grant_number: '665385'
  name: International IST Doctoral Program
publication_status: published
publisher: Springer
publist_id: '7782'
quality_controlled: '1'
related_material:
  record:
  - id: '10199'
    relation: dissertation_contains
    status: public
scopus_import: '1'
status: public
title: Symbolic algorithms for graphs and Markov decision processes with fairness
  objectives
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: conference
user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1
volume: 10982
year: '2018'
...
---
_id: '14198'
abstract:
- lang: eng
  text: "High-dimensional time series are common in many domains. Since human\r\ncognition
    is not optimized to work well in high-dimensional spaces, these areas\r\ncould
    benefit from interpretable low-dimensional representations. However, most\r\nrepresentation
    learning algorithms for time series data are difficult to\r\ninterpret. This is
    due to non-intuitive mappings from data features to salient\r\nproperties of the
    representation and non-smoothness over time. To address this\r\nproblem, we propose
    a new representation learning framework building on ideas\r\nfrom interpretable
    discrete dimensionality reduction and deep generative\r\nmodeling. This framework
    allows us to learn discrete representations of time\r\nseries, which give rise
    to smooth and interpretable embeddings with superior\r\nclustering performance.
    We introduce a new way to overcome the\r\nnon-differentiability in discrete representation
    learning and present a\r\ngradient-based version of the traditional self-organizing
    map algorithm that is\r\nmore performant than the original. Furthermore, to allow
    for a probabilistic\r\ninterpretation of our method, we integrate a Markov model
    in the representation\r\nspace. This model uncovers the temporal transition structure,
    improves\r\nclustering performance even further and provides additional explanatory\r\ninsights
    as well as a natural representation of uncertainty. We evaluate our\r\nmodel in
    terms of clustering performance and interpretability on static\r\n(Fashion-)MNIST
    data, a time series of linearly interpolated (Fashion-)MNIST\r\nimages, a chaotic
    Lorenz attractor system with two macro states, as well as on\r\na challenging
    real world medical time series application on the eICU data set.\r\nOur learned
    representations compare favorably with competitor methods and\r\nfacilitate downstream
    tasks on the real world data."
article_processing_charge: No
arxiv: 1
author:
- first_name: Vincent
  full_name: Fortuin, Vincent
  last_name: Fortuin
- first_name: Matthias
  full_name: Hüser, Matthias
  last_name: Hüser
- first_name: Francesco
  full_name: Locatello, Francesco
  id: 26cfd52f-2483-11ee-8040-88983bcc06d4
  last_name: Locatello
  orcid: 0000-0002-4850-0683
- first_name: Heiko
  full_name: Strathmann, Heiko
  last_name: Strathmann
- first_name: Gunnar
  full_name: Rätsch, Gunnar
  last_name: Rätsch
citation:
  ama: 'Fortuin V, Hüser M, Locatello F, Strathmann H, Rätsch G. SOM-VAE: Interpretable
    discrete representation learning on time series. In: <i>International Conference
    on Learning Representations</i>. ; 2018.'
  apa: 'Fortuin, V., Hüser, M., Locatello, F., Strathmann, H., &#38; Rätsch, G. (2018).
    SOM-VAE: Interpretable discrete representation learning on time series. In <i>International
    Conference on Learning Representations</i>. New Orleans, LA, United States.'
  chicago: 'Fortuin, Vincent, Matthias Hüser, Francesco Locatello, Heiko Strathmann,
    and Gunnar Rätsch. “SOM-VAE: Interpretable Discrete Representation Learning on
    Time Series.” In <i>International Conference on Learning Representations</i>,
    2018.'
  ieee: 'V. Fortuin, M. Hüser, F. Locatello, H. Strathmann, and G. Rätsch, “SOM-VAE:
    Interpretable discrete representation learning on time series,” in <i>International
    Conference on Learning Representations</i>, New Orleans, LA, United States, 2018.'
  ista: 'Fortuin V, Hüser M, Locatello F, Strathmann H, Rätsch G. 2018. SOM-VAE: Interpretable
    discrete representation learning on time series. International Conference on Learning
    Representations. ICLR: International Conference on Learning Representations.'
  mla: 'Fortuin, Vincent, et al. “SOM-VAE: Interpretable Discrete Representation Learning
    on Time Series.” <i>International Conference on Learning Representations</i>,
    2018.'
  short: V. Fortuin, M. Hüser, F. Locatello, H. Strathmann, G. Rätsch, in:, International
    Conference on Learning Representations, 2018.
conference:
  end_date: 2019-05-09
  location: New Orleans, LA, United States
  name: 'ICLR: International Conference on Learning Representations'
  start_date: 2019-05-06
date_created: 2023-08-22T14:12:48Z
date_published: 2018-06-06T00:00:00Z
date_updated: 2023-09-13T06:35:12Z
day: '06'
department:
- _id: FrLo
extern: '1'
external_id:
  arxiv:
  - '1806.02199'
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://arxiv.org/abs/1806.02199
month: '06'
oa: 1
oa_version: Preprint
publication: International Conference on Learning Representations
publication_status: published
quality_controlled: '1'
status: public
title: 'SOM-VAE: Interpretable discrete representation learning on time series'
type: conference
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
year: '2018'
...
---
_id: '142'
abstract:
- lang: eng
  text: We address the problem of analyzing the reachable set of a polynomial nonlinear
    continuous system by over-approximating the flowpipe of its dynamics. The common
    approach to tackle this problem is to perform a numerical integration over a given
    time horizon based on Taylor expansion and interval arithmetic. However, this
    method results to be very conservative when there is a large difference in speed
    between trajectories as time progresses. In this paper, we propose to use combinations
    of barrier functions, which we call piecewise barrier tube (PBT), to over-approximate
    flowpipe. The basic idea of PBT is that for each segment of a flowpipe, a coarse
    box which is big enough to contain the segment is constructed using sampled simulation
    and then in the box we compute by linear programming a set of barrier functions
    (called barrier tube or BT for short) which work together to form a tube surrounding
    the flowpipe. The benefit of using PBT is that (1) BT is independent of time and
    hence can avoid being stretched and deformed by time; and (2) a small number of
    BTs can form a tight over-approximation for the flowpipe, which means that the
    computation required to decide whether the BTs intersect the unsafe set can be
    reduced significantly. We implemented a prototype called PBTS in C++. Experiments
    on some benchmark systems show that our approach is effective.
acknowledgement: 'Austrian Science Fund FWF: S11402-N23, S11405-N23, Z211-N32'
alternative_title:
- LNCS
article_processing_charge: No
author:
- first_name: Hui
  full_name: Kong, Hui
  id: 3BDE25AA-F248-11E8-B48F-1D18A9856A87
  last_name: Kong
  orcid: 0000-0002-3066-6941
- first_name: Ezio
  full_name: Bartocci, Ezio
  last_name: Bartocci
- first_name: Thomas A
  full_name: Henzinger, Thomas A
  id: 40876CD8-F248-11E8-B48F-1D18A9856A87
  last_name: Henzinger
  orcid: 0000−0002−2985−7724
citation:
  ama: 'Kong H, Bartocci E, Henzinger TA. Reachable set over-approximation for nonlinear
    systems using piecewise barrier tubes. In: Vol 10981. Springer; 2018:449-467.
    doi:<a href="https://doi.org/10.1007/978-3-319-96145-3_24">10.1007/978-3-319-96145-3_24</a>'
  apa: 'Kong, H., Bartocci, E., &#38; Henzinger, T. A. (2018). Reachable set over-approximation
    for nonlinear systems using piecewise barrier tubes (Vol. 10981, pp. 449–467).
    Presented at the CAV: Computer Aided Verification, Oxford, United Kingdom: Springer.
    <a href="https://doi.org/10.1007/978-3-319-96145-3_24">https://doi.org/10.1007/978-3-319-96145-3_24</a>'
  chicago: Kong, Hui, Ezio Bartocci, and Thomas A Henzinger. “Reachable Set Over-Approximation
    for Nonlinear Systems Using Piecewise Barrier Tubes,” 10981:449–67. Springer,
    2018. <a href="https://doi.org/10.1007/978-3-319-96145-3_24">https://doi.org/10.1007/978-3-319-96145-3_24</a>.
  ieee: 'H. Kong, E. Bartocci, and T. A. Henzinger, “Reachable set over-approximation
    for nonlinear systems using piecewise barrier tubes,” presented at the CAV: Computer
    Aided Verification, Oxford, United Kingdom, 2018, vol. 10981, pp. 449–467.'
  ista: 'Kong H, Bartocci E, Henzinger TA. 2018. Reachable set over-approximation
    for nonlinear systems using piecewise barrier tubes. CAV: Computer Aided Verification,
    LNCS, vol. 10981, 449–467.'
  mla: Kong, Hui, et al. <i>Reachable Set Over-Approximation for Nonlinear Systems
    Using Piecewise Barrier Tubes</i>. Vol. 10981, Springer, 2018, pp. 449–67, doi:<a
    href="https://doi.org/10.1007/978-3-319-96145-3_24">10.1007/978-3-319-96145-3_24</a>.
  short: H. Kong, E. Bartocci, T.A. Henzinger, in:, Springer, 2018, pp. 449–467.
conference:
  end_date: 2018-07-17
  location: Oxford, United Kingdom
  name: 'CAV: Computer Aided Verification'
  start_date: 2018-07-14
date_created: 2018-12-11T11:44:51Z
date_published: 2018-07-18T00:00:00Z
date_updated: 2023-09-15T12:12:08Z
day: '18'
ddc:
- '000'
department:
- _id: ToHe
doi: 10.1007/978-3-319-96145-3_24
external_id:
  isi:
  - '000491481600024'
file:
- access_level: open_access
  checksum: fd95e8026deacef3dc752a733bb9355f
  content_type: application/pdf
  creator: dernst
  date_created: 2018-12-17T15:57:06Z
  date_updated: 2020-07-14T12:44:53Z
  file_id: '5718'
  file_name: 2018_LNCS_Kong.pdf
  file_size: 5591566
  relation: main_file
file_date_updated: 2020-07-14T12:44:53Z
has_accepted_license: '1'
intvolume: '     10981'
isi: 1
language:
- iso: eng
month: '07'
oa: 1
oa_version: Published Version
page: 449 - 467
project:
- _id: 25832EC2-B435-11E9-9278-68D0E5697425
  call_identifier: FWF
  grant_number: S 11407_N23
  name: Rigorous Systems Engineering
- _id: 25F42A32-B435-11E9-9278-68D0E5697425
  call_identifier: FWF
  grant_number: Z211
  name: The Wittgenstein Prize
publication_status: published
publisher: Springer
publist_id: '7781'
quality_controlled: '1'
scopus_import: '1'
status: public
title: Reachable set over-approximation for nonlinear systems using piecewise barrier
  tubes
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: conference
user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1
volume: 10981
year: '2018'
...
---
_id: '14201'
abstract:
- lang: eng
  text: "Variational inference is a popular technique to approximate a possibly\r\nintractable
    Bayesian posterior with a more tractable one. Recently, boosting\r\nvariational
    inference has been proposed as a new paradigm to approximate the\r\nposterior
    by a mixture of densities by greedily adding components to the\r\nmixture. However,
    as is the case with many other variational inference\r\nalgorithms, its theoretical
    properties have not been studied. In the present\r\nwork, we study the convergence
    properties of this approach from a modern\r\noptimization viewpoint by establishing
    connections to the classic Frank-Wolfe\r\nalgorithm. Our analyses yields novel
    theoretical insights regarding the\r\nsufficient conditions for convergence, explicit
    rates, and algorithmic\r\nsimplifications. Since a lot of focus in previous works
    for variational\r\ninference has been on tractability, our work is especially
    important as a much\r\nneeded attempt to bridge the gap between probabilistic
    models and their\r\ncorresponding theoretical properties."
alternative_title:
- PMLR
article_processing_charge: No
arxiv: 1
author:
- first_name: Francesco
  full_name: Locatello, Francesco
  id: 26cfd52f-2483-11ee-8040-88983bcc06d4
  last_name: Locatello
  orcid: 0000-0002-4850-0683
- first_name: Rajiv
  full_name: Khanna, Rajiv
  last_name: Khanna
- first_name: Joydeep
  full_name: Ghosh, Joydeep
  last_name: Ghosh
- first_name: Gunnar
  full_name: Rätsch, Gunnar
  last_name: Rätsch
citation:
  ama: 'Locatello F, Khanna R, Ghosh J, Rätsch G. Boosting variational inference:
    An optimization perspective. In: <i>Proceedings of the 21st International Conference
    on Artificial Intelligence and Statistics</i>. Vol 84. ML Research Press; 2018:464-472.'
  apa: 'Locatello, F., Khanna, R., Ghosh, J., &#38; Rätsch, G. (2018). Boosting variational
    inference: An optimization perspective. In <i>Proceedings of the 21st International
    Conference on Artificial Intelligence and Statistics</i> (Vol. 84, pp. 464–472).
    Playa Blanca, Lanzarote: ML Research Press.'
  chicago: 'Locatello, Francesco, Rajiv Khanna, Joydeep Ghosh, and Gunnar Rätsch.
    “Boosting Variational Inference: An Optimization Perspective.” In <i>Proceedings
    of the 21st International Conference on Artificial Intelligence and Statistics</i>,
    84:464–72. ML Research Press, 2018.'
  ieee: 'F. Locatello, R. Khanna, J. Ghosh, and G. Rätsch, “Boosting variational inference:
    An optimization perspective,” in <i>Proceedings of the 21st International Conference
    on Artificial Intelligence and Statistics</i>, Playa Blanca, Lanzarote, 2018,
    vol. 84, pp. 464–472.'
  ista: 'Locatello F, Khanna R, Ghosh J, Rätsch G. 2018. Boosting variational inference:
    An optimization perspective. Proceedings of the 21st International Conference
    on Artificial Intelligence and Statistics. AISTATS: Conference on Artificial Intelligence
    and Statistics, PMLR, vol. 84, 464–472.'
  mla: 'Locatello, Francesco, et al. “Boosting Variational Inference: An Optimization
    Perspective.” <i>Proceedings of the 21st International Conference on Artificial
    Intelligence and Statistics</i>, vol. 84, ML Research Press, 2018, pp. 464–72.'
  short: F. Locatello, R. Khanna, J. Ghosh, G. Rätsch, in:, Proceedings of the 21st
    International Conference on Artificial Intelligence and Statistics, ML Research
    Press, 2018, pp. 464–472.
conference:
  end_date: 2018-04-11
  location: Playa Blanca, Lanzarote
  name: 'AISTATS: Conference on Artificial Intelligence and Statistics'
  start_date: 2018-04-09
date_created: 2023-08-22T14:15:20Z
date_published: 2018-04-15T00:00:00Z
date_updated: 2023-09-13T07:52:40Z
day: '15'
department:
- _id: FrLo
extern: '1'
external_id:
  arxiv:
  - '1708.01733'
intvolume: '        84'
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://arxiv.org/abs/1708.01733
month: '04'
oa: 1
oa_version: Preprint
page: 464-472
publication: Proceedings of the 21st International Conference on Artificial Intelligence
  and Statistics
publication_status: published
publisher: ML Research Press
quality_controlled: '1'
scopus_import: '1'
status: public
title: 'Boosting variational inference: An optimization perspective'
type: conference
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 84
year: '2018'
...
---
_id: '14202'
abstract:
- lang: eng
  text: "Approximating a probability density in a tractable manner is a central task\r\nin
    Bayesian statistics. Variational Inference (VI) is a popular technique that\r\nachieves
    tractability by choosing a relatively simple variational family.\r\nBorrowing
    ideas from the classic boosting framework, recent approaches attempt\r\nto \\emph{boost}
    VI by replacing the selection of a single density with a\r\ngreedily constructed
    mixture of densities. In order to guarantee convergence,\r\nprevious works impose
    stringent assumptions that require significant effort for\r\npractitioners. Specifically,
    they require a custom implementation of the greedy\r\nstep (called the LMO) for
    every probabilistic model with respect to an\r\nunnatural variational family of
    truncated distributions. Our work fixes these\r\nissues with novel theoretical
    and algorithmic insights. On the theoretical\r\nside, we show that boosting VI
    satisfies a relaxed smoothness assumption which\r\nis sufficient for the convergence
    of the functional Frank-Wolfe (FW) algorithm.\r\nFurthermore, we rephrase the
    LMO problem and propose to maximize the Residual\r\nELBO (RELBO) which replaces
    the standard ELBO optimization in VI. These\r\ntheoretical enhancements allow
    for black box implementation of the boosting\r\nsubroutine. Finally, we present
    a stopping criterion drawn from the duality gap\r\nin the classic FW analyses
    and exhaustive experiments to illustrate the\r\nusefulness of our theoretical
    and algorithmic contributions."
article_processing_charge: No
arxiv: 1
author:
- first_name: Francesco
  full_name: Locatello, Francesco
  id: 26cfd52f-2483-11ee-8040-88983bcc06d4
  last_name: Locatello
  orcid: 0000-0002-4850-0683
- first_name: Gideon
  full_name: Dresdner, Gideon
  last_name: Dresdner
- first_name: Rajiv
  full_name: Khanna, Rajiv
  last_name: Khanna
- first_name: Isabel
  full_name: Valera, Isabel
  last_name: Valera
- first_name: Gunnar
  full_name: Rätsch, Gunnar
  last_name: Rätsch
citation:
  ama: 'Locatello F, Dresdner G, Khanna R, Valera I, Rätsch G. Boosting black box
    variational inference. In: <i>Advances in Neural Information Processing Systems</i>.
    Vol 31. Neural Information Processing Systems Foundation; 2018.'
  apa: 'Locatello, F., Dresdner, G., Khanna, R., Valera, I., &#38; Rätsch, G. (2018).
    Boosting black box variational inference. In <i>Advances in Neural Information
    Processing Systems</i> (Vol. 31). Montreal, Canada: Neural Information Processing
    Systems Foundation.'
  chicago: Locatello, Francesco, Gideon Dresdner, Rajiv Khanna, Isabel Valera, and
    Gunnar Rätsch. “Boosting Black Box Variational Inference.” In <i>Advances in Neural
    Information Processing Systems</i>, Vol. 31. Neural Information Processing Systems
    Foundation, 2018.
  ieee: F. Locatello, G. Dresdner, R. Khanna, I. Valera, and G. Rätsch, “Boosting
    black box variational inference,” in <i>Advances in Neural Information Processing
    Systems</i>, Montreal, Canada, 2018, vol. 31.
  ista: 'Locatello F, Dresdner G, Khanna R, Valera I, Rätsch G. 2018. Boosting black
    box variational inference. Advances in Neural Information Processing Systems.
    NeurIPS: Neural Information Processing Systems vol. 31.'
  mla: Locatello, Francesco, et al. “Boosting Black Box Variational Inference.” <i>Advances
    in Neural Information Processing Systems</i>, vol. 31, Neural Information Processing
    Systems Foundation, 2018.
  short: F. Locatello, G. Dresdner, R. Khanna, I. Valera, G. Rätsch, in:, Advances
    in Neural Information Processing Systems, Neural Information Processing Systems
    Foundation, 2018.
conference:
  end_date: 2018-12-08
  location: Montreal, Canada
  name: 'NeurIPS: Neural Information Processing Systems'
  start_date: 2018-12-03
date_created: 2023-08-22T14:15:40Z
date_published: 2018-06-06T00:00:00Z
date_updated: 2023-09-13T07:38:24Z
day: '06'
department:
- _id: FrLo
extern: '1'
external_id:
  arxiv:
  - '1806.02185'
intvolume: '        31'
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://arxiv.org/abs/1806.02185
month: '06'
oa: 1
oa_version: Preprint
publication: Advances in Neural Information Processing Systems
publication_identifier:
  eissn:
  - 1049-5258
  isbn:
  - '9781510884472'
publication_status: published
publisher: Neural Information Processing Systems Foundation
quality_controlled: '1'
scopus_import: '1'
status: public
title: Boosting black box variational inference
type: conference
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 31
year: '2018'
...
