---
_id: '994'
abstract:
- lang: eng
text: The formation of vortices is usually considered to be the main mechanism of
angular momentum disposal in superfluids. Recently, it was predicted that a superfluid
can acquire angular momentum via an alternative, microscopic route -- namely,
through interaction with rotating impurities, forming so-called `angulon quasiparticles'
[Phys. Rev. Lett. 114, 203001 (2015)]. The angulon instabilities correspond to
transfer of a small number of angular momentum quanta from the impurity to the
superfluid, as opposed to vortex instabilities, where angular momentum is quantized
in units of ℏ per atom. Furthermore, since conventional impurities (such as molecules)
represent three-dimensional (3D) rotors, the angular momentum transferred is intrinsically
3D as well, as opposed to a merely planar rotation which is inherent to vortices.
Herein we show that the angulon theory can explain the anomalous broadening of
the spectroscopic lines observed for CH 3 and NH 3 molecules in superfluid
helium nanodroplets, thereby providing a fingerprint of the emerging angulon instabilities
in experiment.
article_processing_charge: No
arxiv: 1
author:
- first_name: Igor
full_name: Cherepanov, Igor
id: 339C7E5A-F248-11E8-B48F-1D18A9856A87
last_name: Cherepanov
- first_name: Mikhail
full_name: Lemeshko, Mikhail
id: 37CB05FA-F248-11E8-B48F-1D18A9856A87
last_name: Lemeshko
orcid: 0000-0002-6990-7802
citation:
ama: Cherepanov I, Lemeshko M. Fingerprints of angulon instabilities in the spectra
of matrix-isolated molecules. Physical Review Materials. 2017;1(3). doi:10.1103/PhysRevMaterials.1.035602
apa: Cherepanov, I., & Lemeshko, M. (2017). Fingerprints of angulon instabilities
in the spectra of matrix-isolated molecules. Physical Review Materials.
American Physical Society. https://doi.org/10.1103/PhysRevMaterials.1.035602
chicago: Cherepanov, Igor, and Mikhail Lemeshko. “Fingerprints of Angulon Instabilities
in the Spectra of Matrix-Isolated Molecules.” Physical Review Materials.
American Physical Society, 2017. https://doi.org/10.1103/PhysRevMaterials.1.035602.
ieee: I. Cherepanov and M. Lemeshko, “Fingerprints of angulon instabilities in the
spectra of matrix-isolated molecules,” Physical Review Materials, vol.
1, no. 3. American Physical Society, 2017.
ista: Cherepanov I, Lemeshko M. 2017. Fingerprints of angulon instabilities in the
spectra of matrix-isolated molecules. Physical Review Materials. 1(3).
mla: Cherepanov, Igor, and Mikhail Lemeshko. “Fingerprints of Angulon Instabilities
in the Spectra of Matrix-Isolated Molecules.” Physical Review Materials,
vol. 1, no. 3, American Physical Society, 2017, doi:10.1103/PhysRevMaterials.1.035602.
short: I. Cherepanov, M. Lemeshko, Physical Review Materials 1 (2017).
corr_author: '1'
date_created: 2018-12-11T11:49:35Z
date_published: 2017-08-08T00:00:00Z
date_updated: 2025-06-04T10:15:04Z
day: '08'
department:
- _id: MiLe
doi: 10.1103/PhysRevMaterials.1.035602
ec_funded: 1
external_id:
arxiv:
- '1705.09220'
isi:
- '000416564000004'
intvolume: ' 1'
isi: 1
issue: '3'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/abs/1705.09220
month: '08'
oa: 1
oa_version: Submitted Version
project:
- _id: 26031614-B435-11E9-9278-68D0E5697425
call_identifier: FWF
grant_number: P29902
name: Quantum rotations in the presence of a many-body environment
- _id: 2564DBCA-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '665385'
name: International IST Doctoral Program
publication: Physical Review Materials
publication_status: published
publisher: American Physical Society
publist_id: '6405'
quality_controlled: '1'
scopus_import: '1'
status: public
title: Fingerprints of angulon instabilities in the spectra of matrix-isolated molecules
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 1
year: '2017'
...
---
_id: '995'
abstract:
- lang: eng
text: Recently it was shown that an impurity exchanging orbital angular momentum
with a surrounding bath can be described in terms of the angulon quasiparticle
[Phys. Rev. Lett. 118, 095301 (2017)]. The angulon consists of a quantum rotor
dressed by a many-particle field of boson excitations, and can be formed out of,
for example, a molecule or a nonspherical atom in superfluid helium, or out of
an electron coupled to lattice phonons or a Bose condensate. Here we develop an
approach to the angulon based on the path-integral formalism, which sets the ground
for a systematic, perturbative treatment of the angulon problem. The resulting
perturbation series can be interpreted in terms of Feynman diagrams, from which,
in turn, one can derive a set of diagrammatic rules. These rules extend the machinery
of the graphical theory of angular momentum - well known from theoretical atomic
spectroscopy - to the case where an environment with an infinite number of degrees
of freedom is present. In particular, we show that each diagram can be interpreted
as a 'skeleton', which enforces angular momentum conservation, dressed by an additional
many-body contribution. This connection between the angulon theory and the graphical
theory of angular momentum is particularly important as it allows to systematically
and substantially simplify the analytical representation of each diagram. In order
to exemplify the technique, we calculate the 1- and 2-loop contributions to the
angulon self-energy, the spectral function, and the quasiparticle weight. The
diagrammatic theory we develop paves the way to investigate next-to-leading order
quantities in a more compact way compared to the variational approaches.
article_number: '085410'
article_processing_charge: No
arxiv: 1
author:
- first_name: Giacomo
full_name: Bighin, Giacomo
id: 4CA96FD4-F248-11E8-B48F-1D18A9856A87
last_name: Bighin
orcid: 0000-0001-8823-9777
- first_name: Mikhail
full_name: Lemeshko, Mikhail
id: 37CB05FA-F248-11E8-B48F-1D18A9856A87
last_name: Lemeshko
orcid: 0000-0002-6990-7802
citation:
ama: Bighin G, Lemeshko M. Diagrammatic approach to orbital quantum impurities interacting
with a many-particle environment. Physical Review B - Condensed Matter and
Materials Physics. 2017;96(8). doi:10.1103/PhysRevB.96.085410
apa: Bighin, G., & Lemeshko, M. (2017). Diagrammatic approach to orbital quantum
impurities interacting with a many-particle environment. Physical Review B
- Condensed Matter and Materials Physics. American Physical Society. https://doi.org/10.1103/PhysRevB.96.085410
chicago: Bighin, Giacomo, and Mikhail Lemeshko. “Diagrammatic Approach to Orbital
Quantum Impurities Interacting with a Many-Particle Environment.” Physical
Review B - Condensed Matter and Materials Physics. American Physical Society,
2017. https://doi.org/10.1103/PhysRevB.96.085410.
ieee: G. Bighin and M. Lemeshko, “Diagrammatic approach to orbital quantum impurities
interacting with a many-particle environment,” Physical Review B - Condensed
Matter and Materials Physics, vol. 96, no. 8. American Physical Society, 2017.
ista: Bighin G, Lemeshko M. 2017. Diagrammatic approach to orbital quantum impurities
interacting with a many-particle environment. Physical Review B - Condensed Matter
and Materials Physics. 96(8), 085410.
mla: Bighin, Giacomo, and Mikhail Lemeshko. “Diagrammatic Approach to Orbital Quantum
Impurities Interacting with a Many-Particle Environment.” Physical Review B
- Condensed Matter and Materials Physics, vol. 96, no. 8, 085410, American
Physical Society, 2017, doi:10.1103/PhysRevB.96.085410.
short: G. Bighin, M. Lemeshko, Physical Review B - Condensed Matter and Materials
Physics 96 (2017).
corr_author: '1'
date_created: 2018-12-11T11:49:36Z
date_published: 2017-08-07T00:00:00Z
date_updated: 2025-06-04T08:17:18Z
day: '07'
department:
- _id: MiLe
doi: 10.1103/PhysRevB.96.085410
external_id:
arxiv:
- '1704.02616'
isi:
- '000407017100009'
intvolume: ' 96'
isi: 1
issue: '8'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/abs/1704.02616
month: '08'
oa: 1
oa_version: Submitted Version
project:
- _id: 26031614-B435-11E9-9278-68D0E5697425
call_identifier: FWF
grant_number: P29902
name: Quantum rotations in the presence of a many-body environment
publication: Physical Review B - Condensed Matter and Materials Physics
publication_identifier:
issn:
- 2469-9950
publication_status: published
publisher: American Physical Society
publist_id: '6404'
quality_controlled: '1'
scopus_import: '1'
status: public
title: Diagrammatic approach to orbital quantum impurities interacting with a many-particle
environment
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 96
year: '2017'
...
---
_id: '996'
abstract:
- lang: eng
text: 'Iodine (I 2 ) molecules embedded in He nanodroplets are aligned by a 160
ps long laser pulse. The highest degree of alignment, occurring at the peak of
the pulse and quantified by ⟨cos 2 θ 2D ⟩ , is measured as a function of the laser
intensity. The results are well described by ⟨cos 2 θ 2D ⟩ calculated for a gas
of isolated molecules each with an effective rotational constant of 0.6 times
the gas-phase value, and at a temperature of 0.4 K. Theoretical analysis using
the angulon quasiparticle to describe rotating molecules in superfluid helium
rationalizes why the alignment mechanism is similar to that of isolated molecules
with an effective rotational constant. A major advantage of molecules in He droplets
is that their 0.4 K temperature leads to stronger alignment than what can generally
be achieved for gas phase molecules -- here demonstrated by a direct comparison
of the droplet results to measurements on a ∼ 1 K supersonic beam of isolated
molecules. This point is further illustrated for more complex system by measurements
on 1,4-diiodobenzene and 1,4-dibromobenzene. For all three molecular species studied
the highest values of ⟨cos 2 θ 2D ⟩ achieved in He droplets exceed 0.96. '
article_number: '013946'
article_processing_charge: No
arxiv: 1
author:
- first_name: Benjamin
full_name: Shepperson, Benjamin
last_name: Shepperson
- first_name: Adam
full_name: Chatterley, Adam
last_name: Chatterley
- first_name: Anders
full_name: Søndergaard, Anders
last_name: Søndergaard
- first_name: Lars
full_name: Christiansen, Lars
last_name: Christiansen
- first_name: Mikhail
full_name: Lemeshko, Mikhail
id: 37CB05FA-F248-11E8-B48F-1D18A9856A87
last_name: Lemeshko
orcid: 0000-0002-6990-7802
- first_name: Henrik
full_name: Stapelfeldt, Henrik
last_name: Stapelfeldt
citation:
ama: Shepperson B, Chatterley A, Søndergaard A, Christiansen L, Lemeshko M, Stapelfeldt
H. Strongly aligned molecules inside helium droplets in the near-adiabatic regime.
The Journal of Chemical Physics. 2017;147(1). doi:10.1063/1.4983703
apa: Shepperson, B., Chatterley, A., Søndergaard, A., Christiansen, L., Lemeshko,
M., & Stapelfeldt, H. (2017). Strongly aligned molecules inside helium droplets
in the near-adiabatic regime. The Journal of Chemical Physics. AIP Publishing.
https://doi.org/10.1063/1.4983703
chicago: Shepperson, Benjamin, Adam Chatterley, Anders Søndergaard, Lars Christiansen,
Mikhail Lemeshko, and Henrik Stapelfeldt. “Strongly Aligned Molecules inside Helium
Droplets in the Near-Adiabatic Regime.” The Journal of Chemical Physics.
AIP Publishing, 2017. https://doi.org/10.1063/1.4983703.
ieee: B. Shepperson, A. Chatterley, A. Søndergaard, L. Christiansen, M. Lemeshko,
and H. Stapelfeldt, “Strongly aligned molecules inside helium droplets in the
near-adiabatic regime,” The Journal of Chemical Physics, vol. 147, no.
1. AIP Publishing, 2017.
ista: Shepperson B, Chatterley A, Søndergaard A, Christiansen L, Lemeshko M, Stapelfeldt
H. 2017. Strongly aligned molecules inside helium droplets in the near-adiabatic
regime. The Journal of Chemical Physics. 147(1), 013946.
mla: Shepperson, Benjamin, et al. “Strongly Aligned Molecules inside Helium Droplets
in the Near-Adiabatic Regime.” The Journal of Chemical Physics, vol. 147,
no. 1, 013946, AIP Publishing, 2017, doi:10.1063/1.4983703.
short: B. Shepperson, A. Chatterley, A. Søndergaard, L. Christiansen, M. Lemeshko,
H. Stapelfeldt, The Journal of Chemical Physics 147 (2017).
date_created: 2018-12-11T11:49:36Z
date_published: 2017-06-01T00:00:00Z
date_updated: 2025-06-04T08:17:46Z
day: '01'
department:
- _id: MiLe
doi: 10.1063/1.4983703
external_id:
arxiv:
- '1704.03684'
isi:
- '000405089400047'
intvolume: ' 147'
isi: 1
issue: '1'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/abs/1704.03684
month: '06'
oa: 1
oa_version: Submitted Version
publication: The Journal of Chemical Physics
publication_identifier:
issn:
- 0021-9606
publication_status: published
publisher: AIP Publishing
publist_id: '6403'
quality_controlled: '1'
scopus_import: '1'
status: public
title: Strongly aligned molecules inside helium droplets in the near-adiabatic regime
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 147
year: '2017'
...
---
_id: '997'
abstract:
- lang: eng
text: Recently it was shown that molecules rotating in superfluid helium can be
described in terms of the angulon quasiparticles (Phys. Rev. Lett. 118, 095301
(2017)). Here we demonstrate that in the experimentally realized regime the angulon
can be seen as a point charge on a 2-sphere interacting with a gauge field of
a non-abelian magnetic monopole. Unlike in several other settings, the gauge fields
of the angulon problem emerge in the real coordinate space, as opposed to the
momentum space or some effective parameter space. Furthermore, we find a topological
transition associated with making the monopole abelian, which takes place in the
vicinity of the previously reported angulon instabilities. These results pave
the way for studying topological phenomena in experiments on molecules trapped
in superfluid helium nanodroplets, as well as on other realizations of orbital
impurity problems.
article_number: '235301'
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Enderalp
full_name: Yakaboylu, Enderalp
id: 38CB71F6-F248-11E8-B48F-1D18A9856A87
last_name: Yakaboylu
orcid: 0000-0001-5973-0874
- first_name: Andreas
full_name: Deuchert, Andreas
id: 4DA65CD0-F248-11E8-B48F-1D18A9856A87
last_name: Deuchert
orcid: 0000-0003-3146-6746
- first_name: Mikhail
full_name: Lemeshko, Mikhail
id: 37CB05FA-F248-11E8-B48F-1D18A9856A87
last_name: Lemeshko
orcid: 0000-0002-6990-7802
citation:
ama: Yakaboylu E, Deuchert A, Lemeshko M. Emergence of non-abelian magnetic monopoles
in a quantum impurity problem. Physical Review Letters. 2017;119(23). doi:10.1103/PhysRevLett.119.235301
apa: Yakaboylu, E., Deuchert, A., & Lemeshko, M. (2017). Emergence of non-abelian
magnetic monopoles in a quantum impurity problem. Physical Review Letters.
American Physical Society. https://doi.org/10.1103/PhysRevLett.119.235301
chicago: Yakaboylu, Enderalp, Andreas Deuchert, and Mikhail Lemeshko. “Emergence
of Non-Abelian Magnetic Monopoles in a Quantum Impurity Problem.” Physical
Review Letters. American Physical Society, 2017. https://doi.org/10.1103/PhysRevLett.119.235301.
ieee: E. Yakaboylu, A. Deuchert, and M. Lemeshko, “Emergence of non-abelian magnetic
monopoles in a quantum impurity problem,” Physical Review Letters, vol.
119, no. 23. American Physical Society, 2017.
ista: Yakaboylu E, Deuchert A, Lemeshko M. 2017. Emergence of non-abelian magnetic
monopoles in a quantum impurity problem. Physical Review Letters. 119(23), 235301.
mla: Yakaboylu, Enderalp, et al. “Emergence of Non-Abelian Magnetic Monopoles in
a Quantum Impurity Problem.” Physical Review Letters, vol. 119, no. 23,
235301, American Physical Society, 2017, doi:10.1103/PhysRevLett.119.235301.
short: E. Yakaboylu, A. Deuchert, M. Lemeshko, Physical Review Letters 119 (2017).
corr_author: '1'
date_created: 2018-12-11T11:49:36Z
date_published: 2017-12-06T00:00:00Z
date_updated: 2025-04-14T07:26:54Z
day: '06'
department:
- _id: MiLe
- _id: RoSe
doi: 10.1103/PhysRevLett.119.235301
ec_funded: 1
external_id:
arxiv:
- '1705.05162'
isi:
- '000417132100007'
intvolume: ' 119'
isi: 1
issue: '23'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/abs/1705.05162
month: '12'
oa: 1
oa_version: Preprint
project:
- _id: 25681D80-B435-11E9-9278-68D0E5697425
call_identifier: FP7
grant_number: '291734'
name: International IST Postdoc Fellowship Programme
- _id: 25C6DC12-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '694227'
name: Analysis of quantum many-body systems
- _id: 26031614-B435-11E9-9278-68D0E5697425
call_identifier: FWF
grant_number: P29902
name: Quantum rotations in the presence of a many-body environment
publication: Physical Review Letters
publication_identifier:
issn:
- 0031-9007
publication_status: published
publisher: American Physical Society
publist_id: '6401'
quality_controlled: '1'
scopus_import: '1'
status: public
title: Emergence of non-abelian magnetic monopoles in a quantum impurity problem
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 119
year: '2017'
...
---
_id: '998'
abstract:
- lang: eng
text: 'A major open problem on the road to artificial intelligence is the development
of incrementally learning systems that learn about more and more concepts over
time from a stream of data. In this work, we introduce a new training strategy,
iCaRL, that allows learning in such a class-incremental way: only the training
data for a small number of classes has to be present at the same time and new
classes can be added progressively. iCaRL learns strong classifiers and a data
representation simultaneously. This distinguishes it from earlier works that were
fundamentally limited to fixed data representations and therefore incompatible
with deep learning architectures. We show by experiments on CIFAR-100 and ImageNet
ILSVRC 2012 data that iCaRL can learn many classes incrementally over a long period
of time where other strategies quickly fail. '
article_processing_charge: No
arxiv: 1
author:
- first_name: Sylvestre Alvise
full_name: Rebuffi, Sylvestre Alvise
last_name: Rebuffi
- first_name: Alexander
full_name: Kolesnikov, Alexander
id: 2D157DB6-F248-11E8-B48F-1D18A9856A87
last_name: Kolesnikov
- first_name: Georg
full_name: Sperl, Georg
id: 4DD40360-F248-11E8-B48F-1D18A9856A87
last_name: Sperl
- first_name: Christoph
full_name: Lampert, Christoph
id: 40C20FD2-F248-11E8-B48F-1D18A9856A87
last_name: Lampert
orcid: 0000-0001-8622-7887
citation:
ama: 'Rebuffi SA, Kolesnikov A, Sperl G, Lampert C. iCaRL: Incremental classifier
and representation learning. In: Vol 2017. IEEE; 2017:5533-5542. doi:10.1109/CVPR.2017.587'
apa: 'Rebuffi, S. A., Kolesnikov, A., Sperl, G., & Lampert, C. (2017). iCaRL:
Incremental classifier and representation learning (Vol. 2017, pp. 5533–5542).
Presented at the CVPR: Computer Vision and Pattern Recognition, Honolulu, HA,
United States: IEEE. https://doi.org/10.1109/CVPR.2017.587'
chicago: 'Rebuffi, Sylvestre Alvise, Alexander Kolesnikov, Georg Sperl, and Christoph
Lampert. “ICaRL: Incremental Classifier and Representation Learning,” 2017:5533–42.
IEEE, 2017. https://doi.org/10.1109/CVPR.2017.587.'
ieee: 'S. A. Rebuffi, A. Kolesnikov, G. Sperl, and C. Lampert, “iCaRL: Incremental
classifier and representation learning,” presented at the CVPR: Computer Vision
and Pattern Recognition, Honolulu, HA, United States, 2017, vol. 2017, pp. 5533–5542.'
ista: 'Rebuffi SA, Kolesnikov A, Sperl G, Lampert C. 2017. iCaRL: Incremental classifier
and representation learning. CVPR: Computer Vision and Pattern Recognition vol.
2017, 5533–5542.'
mla: 'Rebuffi, Sylvestre Alvise, et al. ICaRL: Incremental Classifier and Representation
Learning. Vol. 2017, IEEE, 2017, pp. 5533–42, doi:10.1109/CVPR.2017.587.'
short: S.A. Rebuffi, A. Kolesnikov, G. Sperl, C. Lampert, in:, IEEE, 2017, pp. 5533–5542.
conference:
end_date: 2017-07-26
location: Honolulu, HA, United States
name: 'CVPR: Computer Vision and Pattern Recognition'
start_date: 2017-07-21
date_created: 2018-12-11T11:49:37Z
date_published: 2017-04-14T00:00:00Z
date_updated: 2025-06-04T08:18:32Z
day: '14'
department:
- _id: ChLa
- _id: ChWo
doi: 10.1109/CVPR.2017.587
ec_funded: 1
external_id:
arxiv:
- '1611.07725'
isi:
- '000418371405066'
intvolume: ' 2017'
isi: 1
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/abs/1611.07725
month: '04'
oa: 1
oa_version: Submitted Version
page: 5533 - 5542
project:
- _id: 2532554C-B435-11E9-9278-68D0E5697425
call_identifier: FP7
grant_number: '308036'
name: Lifelong Learning of Visual Scene Understanding
publication_identifier:
isbn:
- 978-153860457-1
publication_status: published
publisher: IEEE
publist_id: '6400'
quality_controlled: '1'
scopus_import: '1'
status: public
title: 'iCaRL: Incremental classifier and representation learning'
type: conference
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 2017
year: '2017'
...
---
_id: '999'
abstract:
- lang: eng
text: 'In multi-task learning, a learner is given a collection of prediction tasks
and needs to solve all of them. In contrast to previous work, which required that
annotated training data must be available for all tasks, we consider a new setting,
in which for some tasks, potentially most of them, only unlabeled training data
is provided. Consequently, to solve all tasks, information must be transferred
between tasks with labels and tasks without labels. Focusing on an instance-based
transfer method we analyze two variants of this setting: when the set of labeled
tasks is fixed, and when it can be actively selected by the learner. We state
and prove a generalization bound that covers both scenarios and derive from it
an algorithm for making the choice of labeled tasks (in the active case) and for
transferring information between the tasks in a principled way. We also illustrate
the effectiveness of the algorithm on synthetic and real data. '
alternative_title:
- PMLR
article_processing_charge: No
arxiv: 1
author:
- first_name: Anastasia
full_name: Pentina, Anastasia
id: 42E87FC6-F248-11E8-B48F-1D18A9856A87
last_name: Pentina
- first_name: Christoph
full_name: Lampert, Christoph
id: 40C20FD2-F248-11E8-B48F-1D18A9856A87
last_name: Lampert
orcid: 0000-0001-8622-7887
citation:
ama: 'Pentina A, Lampert C. Multi-task learning with labeled and unlabeled tasks.
In: Vol 70. ML Research Press; 2017:2807-2816.'
apa: 'Pentina, A., & Lampert, C. (2017). Multi-task learning with labeled and
unlabeled tasks (Vol. 70, pp. 2807–2816). Presented at the ICML: International
Conference on Machine Learning, Sydney, Australia: ML Research Press.'
chicago: Pentina, Anastasia, and Christoph Lampert. “Multi-Task Learning with Labeled
and Unlabeled Tasks,” 70:2807–16. ML Research Press, 2017.
ieee: 'A. Pentina and C. Lampert, “Multi-task learning with labeled and unlabeled
tasks,” presented at the ICML: International Conference on Machine Learning, Sydney,
Australia, 2017, vol. 70, pp. 2807–2816.'
ista: 'Pentina A, Lampert C. 2017. Multi-task learning with labeled and unlabeled
tasks. ICML: International Conference on Machine Learning, PMLR, vol. 70, 2807–2816.'
mla: Pentina, Anastasia, and Christoph Lampert. Multi-Task Learning with Labeled
and Unlabeled Tasks. Vol. 70, ML Research Press, 2017, pp. 2807–16.
short: A. Pentina, C. Lampert, in:, ML Research Press, 2017, pp. 2807–2816.
conference:
end_date: 2017-08-11
location: Sydney, Australia
name: 'ICML: International Conference on Machine Learning'
start_date: 2017-08-06
corr_author: '1'
date_created: 2018-12-11T11:49:37Z
date_published: 2017-06-08T00:00:00Z
date_updated: 2025-06-04T08:19:03Z
day: '08'
department:
- _id: ChLa
ec_funded: 1
external_id:
arxiv:
- '1602.06518'
isi:
- '000683309502093'
intvolume: ' 70'
isi: 1
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/abs/1602.06518
month: '06'
oa: 1
oa_version: Submitted Version
page: 2807 - 2816
project:
- _id: 2532554C-B435-11E9-9278-68D0E5697425
call_identifier: FP7
grant_number: '308036'
name: Lifelong Learning of Visual Scene Understanding
publication_identifier:
isbn:
- '9781510855144'
publication_status: published
publisher: ML Research Press
publist_id: '6399'
quality_controlled: '1'
scopus_import: '1'
status: public
title: Multi-task learning with labeled and unlabeled tasks
type: conference
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 70
year: '2017'
...
---
_id: '424'
abstract:
- lang: eng
text: 'We show that very weak topological assumptions are enough to ensure the existence
of a Helly-type theorem. More precisely, we show that for any non-negative integers
b and d there exists an integer h(b, d) such that the following holds. If F is
a finite family of subsets of Rd such that βi(∩G)≤b for any G⊊F and every 0 ≤
i ≤ [d/2]-1 then F has Helly number at most h(b, d). Here βi denotes the reduced
Z2-Betti numbers (with singular homology). These topological conditions are sharp:
not controlling any of these [d/2] first Betti numbers allow for families with
unbounded Helly number. Our proofs combine homological non-embeddability results
with a Ramsey-based approach to build, given an arbitrary simplicial complex K,
some well-behaved chain map C*(K)→C*(Rd).'
article_processing_charge: No
arxiv: 1
author:
- first_name: Xavier
full_name: Goaoc, Xavier
last_name: Goaoc
- first_name: Pavel
full_name: Paták, Pavel
last_name: Paták
- first_name: Zuzana
full_name: Patakova, Zuzana
last_name: Patakova
orcid: 0000-0002-3975-1683
- first_name: Martin
full_name: Tancer, Martin
last_name: Tancer
orcid: 0000-0002-1191-6714
- first_name: Uli
full_name: Wagner, Uli
id: 36690CA2-F248-11E8-B48F-1D18A9856A87
last_name: Wagner
orcid: 0000-0002-1494-0568
citation:
ama: 'Goaoc X, Paták P, Patakova Z, Tancer M, Wagner U. Bounding helly numbers via
betti numbers. In: Loebl M, Nešetřil J, Thomas R, eds. A Journey through Discrete
Mathematics: A Tribute to Jiri Matousek. A Journey Through Discrete Mathematics.
Springer; 2017:407-447. doi:10.1007/978-3-319-44479-6_17'
apa: 'Goaoc, X., Paták, P., Patakova, Z., Tancer, M., & Wagner, U. (2017). Bounding
helly numbers via betti numbers. In M. Loebl, J. Nešetřil, & R. Thomas (Eds.),
A Journey through Discrete Mathematics: A Tribute to Jiri Matousek (pp.
407–447). Springer. https://doi.org/10.1007/978-3-319-44479-6_17'
chicago: 'Goaoc, Xavier, Pavel Paták, Zuzana Patakova, Martin Tancer, and Uli Wagner.
“Bounding Helly Numbers via Betti Numbers.” In A Journey through Discrete Mathematics:
A Tribute to Jiri Matousek, edited by Martin Loebl, Jaroslav Nešetřil, and
Robin Thomas, 407–47. A Journey Through Discrete Mathematics. Springer, 2017.
https://doi.org/10.1007/978-3-319-44479-6_17.'
ieee: 'X. Goaoc, P. Paták, Z. Patakova, M. Tancer, and U. Wagner, “Bounding helly
numbers via betti numbers,” in A Journey through Discrete Mathematics: A Tribute
to Jiri Matousek, M. Loebl, J. Nešetřil, and R. Thomas, Eds. Springer, 2017,
pp. 407–447.'
ista: 'Goaoc X, Paták P, Patakova Z, Tancer M, Wagner U. 2017.Bounding helly numbers
via betti numbers. In: A Journey through Discrete Mathematics: A Tribute to Jiri
Matousek. , 407–447.'
mla: 'Goaoc, Xavier, et al. “Bounding Helly Numbers via Betti Numbers.” A Journey
through Discrete Mathematics: A Tribute to Jiri Matousek, edited by Martin
Loebl et al., Springer, 2017, pp. 407–47, doi:10.1007/978-3-319-44479-6_17.'
short: 'X. Goaoc, P. Paták, Z. Patakova, M. Tancer, U. Wagner, in:, M. Loebl, J.
Nešetřil, R. Thomas (Eds.), A Journey through Discrete Mathematics: A Tribute
to Jiri Matousek, Springer, 2017, pp. 407–447.'
date_created: 2018-12-11T11:46:24Z
date_published: 2017-10-06T00:00:00Z
date_updated: 2025-06-04T08:47:28Z
day: '06'
department:
- _id: UlWa
doi: 10.1007/978-3-319-44479-6_17
editor:
- first_name: Martin
full_name: Loebl, Martin
last_name: Loebl
- first_name: Jaroslav
full_name: Nešetřil, Jaroslav
last_name: Nešetřil
- first_name: Robin
full_name: Thomas, Robin
last_name: Thomas
external_id:
arxiv:
- '1310.4613'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/abs/1310.4613
month: '10'
oa: 1
oa_version: Published Version
page: 407 - 447
publication: 'A Journey through Discrete Mathematics: A Tribute to Jiri Matousek'
publication_identifier:
isbn:
- 978-331944479-6
publication_status: published
publisher: Springer
publist_id: '7399'
quality_controlled: '1'
related_material:
record:
- id: '1512'
relation: earlier_version
status: public
scopus_import: '1'
series_title: A Journey Through Discrete Mathematics
status: public
title: Bounding helly numbers via betti numbers
type: book_chapter
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
year: '2017'
...
---
_id: '431'
abstract:
- lang: eng
text: 'Parallel implementations of stochastic gradient descent (SGD) have received
significant research attention, thanks to its excellent scalability properties.
A fundamental barrier when parallelizing SGD is the high bandwidth cost of communicating
gradient updates between nodes; consequently, several lossy compresion heuristics
have been proposed, by which nodes only communicate quantized gradients. Although
effective in practice, these heuristics do not always converge. In this paper,
we propose Quantized SGD (QSGD), a family of compression schemes with convergence
guarantees and good practical performance. QSGD allows the user to smoothly trade
off communication bandwidth and convergence time: nodes can adjust the number
of bits sent per iteration, at the cost of possibly higher variance. We show that
this trade-off is inherent, in the sense that improving it past some threshold
would violate information-theoretic lower bounds. QSGD guarantees convergence
for convex and non-convex objectives, under asynchrony, and can be extended to
stochastic variance-reduced techniques. When applied to training deep neural networks
for image classification and automated speech recognition, QSGD leads to significant
reductions in end-to-end training time. For instance, on 16GPUs, we can train
the ResNet-152 network to full accuracy on ImageNet 1.8 × faster than the full-precision
variant. '
alternative_title:
- Advances in Neural Information Processing Systems
article_processing_charge: No
arxiv: 1
author:
- first_name: Dan-Adrian
full_name: Alistarh, Dan-Adrian
id: 4A899BFC-F248-11E8-B48F-1D18A9856A87
last_name: Alistarh
orcid: 0000-0003-3650-940X
- first_name: Demjan
full_name: Grubic, Demjan
last_name: Grubic
- first_name: Jerry
full_name: Li, Jerry
last_name: Li
- first_name: Ryota
full_name: Tomioka, Ryota
last_name: Tomioka
- first_name: Milan
full_name: Vojnović, Milan
last_name: Vojnović
citation:
ama: 'Alistarh D-A, Grubic D, Li J, Tomioka R, Vojnović M. QSGD: Communication-efficient
SGD via gradient quantization and encoding. In: Vol 2017. Neural Information Processing
Systems Foundation; 2017:1710-1721.'
apa: 'Alistarh, D.-A., Grubic, D., Li, J., Tomioka, R., & Vojnović, M. (2017).
QSGD: Communication-efficient SGD via gradient quantization and encoding (Vol.
2017, pp. 1710–1721). Presented at the NIPS: Neural Information Processing System,
Long Beach, CA, United States: Neural Information Processing Systems Foundation.'
chicago: 'Alistarh, Dan-Adrian, Demjan Grubic, Jerry Li, Ryota Tomioka, and Milan
Vojnović. “QSGD: Communication-Efficient SGD via Gradient Quantization and Encoding,”
2017:1710–21. Neural Information Processing Systems Foundation, 2017.'
ieee: 'D.-A. Alistarh, D. Grubic, J. Li, R. Tomioka, and M. Vojnović, “QSGD: Communication-efficient
SGD via gradient quantization and encoding,” presented at the NIPS: Neural Information
Processing System, Long Beach, CA, United States, 2017, vol. 2017, pp. 1710–1721.'
ista: 'Alistarh D-A, Grubic D, Li J, Tomioka R, Vojnović M. 2017. QSGD: Communication-efficient
SGD via gradient quantization and encoding. NIPS: Neural Information Processing
System, Advances in Neural Information Processing Systems, vol. 2017, 1710–1721.'
mla: 'Alistarh, Dan-Adrian, et al. QSGD: Communication-Efficient SGD via Gradient
Quantization and Encoding. Vol. 2017, Neural Information Processing Systems
Foundation, 2017, pp. 1710–21.'
short: D.-A. Alistarh, D. Grubic, J. Li, R. Tomioka, M. Vojnović, in:, Neural Information
Processing Systems Foundation, 2017, pp. 1710–1721.
conference:
end_date: 2017-12-09
location: Long Beach, CA, United States
name: 'NIPS: Neural Information Processing System'
start_date: 2017-12-04
corr_author: '1'
date_created: 2018-12-11T11:46:26Z
date_published: 2017-01-01T00:00:00Z
date_updated: 2025-09-18T10:07:20Z
day: '01'
department:
- _id: DaAl
external_id:
arxiv:
- '1610.02132'
isi:
- '000452649401072'
intvolume: ' 2017'
isi: 1
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/abs/1610.02132
month: '01'
oa: 1
oa_version: Submitted Version
page: 1710-1721
publication_identifier:
issn:
- 1049-5258
publication_status: published
publisher: Neural Information Processing Systems Foundation
publist_id: '7392'
quality_controlled: '1'
status: public
title: 'QSGD: Communication-efficient SGD via gradient quantization and encoding'
type: conference
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 2017
year: '2017'
...
---
_id: '432'
abstract:
- lang: eng
text: 'Recently there has been significant interest in training machine-learning
models at low precision: by reducing precision, one can reduce computation and
communication by one order of magnitude. We examine training at reduced precision,
both from a theoretical and practical perspective, and ask: is it possible to
train models at end-to-end low precision with provable guarantees? Can this lead
to consistent order-of-magnitude speedups? We mainly focus on linear models, and
the answer is yes for linear models. We develop a simple framework called ZipML
based on one simple but novel strategy called double sampling. Our ZipML framework
is able to execute training at low precision with no bias, guaranteeing convergence,
whereas naive quanti- zation would introduce significant bias. We val- idate our
framework across a range of applica- tions, and show that it enables an FPGA proto-
type that is up to 6.5 × faster than an implemen- tation using full 32-bit precision.
We further de- velop a variance-optimal stochastic quantization strategy and show
that it can make a significant difference in a variety of settings. When applied
to linear models together with double sampling, we save up to another 1.7 × in
data movement compared with uniform quantization. When training deep networks
with quantized models, we achieve higher accuracy than the state-of-the- art XNOR-Net. '
alternative_title:
- PMLR Press
article_processing_charge: No
author:
- first_name: Hantian
full_name: Zhang, Hantian
last_name: Zhang
- first_name: Jerry
full_name: Li, Jerry
last_name: Li
- first_name: Kaan
full_name: Kara, Kaan
last_name: Kara
- first_name: Dan-Adrian
full_name: Alistarh, Dan-Adrian
id: 4A899BFC-F248-11E8-B48F-1D18A9856A87
last_name: Alistarh
orcid: 0000-0003-3650-940X
- first_name: Ji
full_name: Liu, Ji
last_name: Liu
- first_name: Ce
full_name: Zhang, Ce
last_name: Zhang
citation:
ama: 'Zhang H, Li J, Kara K, Alistarh D-A, Liu J, Zhang C. ZipML: Training linear
models with end-to-end low precision, and a little bit of deep learning. In: Proceedings
of Machine Learning Research. Vol 70. ML Research Press; 2017:4035-4043.'
apa: 'Zhang, H., Li, J., Kara, K., Alistarh, D.-A., Liu, J., & Zhang, C. (2017).
ZipML: Training linear models with end-to-end low precision, and a little bit
of deep learning. In Proceedings of Machine Learning Research (Vol. 70,
pp. 4035–4043). Sydney, Australia: ML Research Press.'
chicago: 'Zhang, Hantian, Jerry Li, Kaan Kara, Dan-Adrian Alistarh, Ji Liu, and
Ce Zhang. “ZipML: Training Linear Models with End-to-End Low Precision, and a
Little Bit of Deep Learning.” In Proceedings of Machine Learning Research,
70:4035–43. ML Research Press, 2017.'
ieee: 'H. Zhang, J. Li, K. Kara, D.-A. Alistarh, J. Liu, and C. Zhang, “ZipML: Training
linear models with end-to-end low precision, and a little bit of deep learning,”
in Proceedings of Machine Learning Research, Sydney, Australia, 2017, vol.
70, pp. 4035–4043.'
ista: 'Zhang H, Li J, Kara K, Alistarh D-A, Liu J, Zhang C. 2017. ZipML: Training
linear models with end-to-end low precision, and a little bit of deep learning.
Proceedings of Machine Learning Research. ICML: International Conference on Machine
Learning, PMLR Press, vol. 70, 4035–4043.'
mla: 'Zhang, Hantian, et al. “ZipML: Training Linear Models with End-to-End Low
Precision, and a Little Bit of Deep Learning.” Proceedings of Machine Learning
Research, vol. 70, ML Research Press, 2017, pp. 4035–43.'
short: H. Zhang, J. Li, K. Kara, D.-A. Alistarh, J. Liu, C. Zhang, in:, Proceedings
of Machine Learning Research, ML Research Press, 2017, pp. 4035–4043.
conference:
end_date: 2017-08-11
location: Sydney, Australia
name: 'ICML: International Conference on Machine Learning'
start_date: 2017-08-06
corr_author: '1'
date_created: 2018-12-11T11:46:26Z
date_published: 2017-01-01T00:00:00Z
date_updated: 2025-09-18T10:06:02Z
day: '01'
ddc:
- '000'
department:
- _id: DaAl
external_id:
isi:
- '000683309504015'
file:
- access_level: open_access
checksum: 86156ba7f4318e47cef3eb9092593c10
content_type: application/pdf
creator: dernst
date_created: 2019-01-22T08:23:58Z
date_updated: 2020-07-14T12:46:26Z
file_id: '5869'
file_name: 2017_ICML_Zhang.pdf
file_size: 849345
relation: main_file
file_date_updated: 2020-07-14T12:46:26Z
has_accepted_license: '1'
isi: 1
language:
- iso: eng
month: '01'
oa: 1
oa_version: Submitted Version
page: 4035 - 4043
publication: Proceedings of Machine Learning Research
publication_identifier:
isbn:
- 978-151085514-4
publication_status: published
publisher: ML Research Press
publist_id: '7391'
quality_controlled: '1'
scopus_import: '1'
status: public
title: 'ZipML: Training linear models with end-to-end low precision, and a little
bit of deep learning'
type: conference
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: ' 70'
year: '2017'
...
---
_id: '444'
abstract:
- lang: eng
text: Complex I (NADH:ubiquinone oxidoreductase) plays a central role in cellular
energy generation, contributing to the proton motive force used to produce ATP.
It couples the transfer of two electrons between NADH and quinone to translocation
of four protons across the membrane. It is the largest protein assembly of bacterial
and mitochondrial respiratory chains, composed, in mammals, of up to 45 subunits
with a total molecular weight of ∼1 MDa. Bacterial enzyme is about half the size,
providing the important “minimal” model of complex I. The l-shaped complex consists
of a hydrophilic arm, where electron transfer occurs, and a membrane arm, where
proton translocation takes place. Previously, we have solved the crystal structures
of the hydrophilic domain of complex I from Thermus thermophilus and of the membrane
domain from Escherichia coli, followed by the atomic structure of intact, entire
complex I from T. thermophilus. Recently, we have solved by cryo-EM a first complete
atomic structure of mammalian (ovine) mitochondrial complex I. Core subunits are
well conserved from the bacterial version, whilst supernumerary subunits form
an interlinked, stabilizing shell around the core. Subunits containing additional
cofactors, including Zn ion, NADPH and phosphopantetheine, probably have regulatory
roles. Dysfunction of mitochondrial complex I is implicated in many human neurodegenerative
diseases. The structure of mammalian enzyme provides many insights into complex
I mechanism, assembly, maturation and dysfunction, allowing detailed molecular
analysis of disease-causing mutations.
author:
- first_name: Leonid A
full_name: Sazanov, Leonid A
id: 338D39FE-F248-11E8-B48F-1D18A9856A87
last_name: Sazanov
orcid: 0000-0002-0977-7989
citation:
ama: 'Sazanov LA. Structure of respiratory complex I: “Minimal” bacterial and “de
luxe” mammalian versions. In: Wikström M, ed. Mechanisms of Primary Energy
Transduction in Biology . Mechanisms of Primary Energy Transduction in Biology
. Royal Society of Chemistry; 2017:25-59. doi:10.1039/9781788010405-00025'
apa: 'Sazanov, L. A. (2017). Structure of respiratory complex I: “Minimal” bacterial
and “de luxe” mammalian versions. In M. Wikström (Ed.), Mechanisms of primary
energy transduction in biology (pp. 25–59). Royal Society of Chemistry. https://doi.org/10.1039/9781788010405-00025'
chicago: 'Sazanov, Leonid A. “Structure of Respiratory Complex I: ‘Minimal’ Bacterial
and ‘de Luxe’ Mammalian Versions.” In Mechanisms of Primary Energy Transduction
in Biology , edited by Mårten Wikström, 25–59. Mechanisms of Primary Energy
Transduction in Biology . Royal Society of Chemistry, 2017. https://doi.org/10.1039/9781788010405-00025.'
ieee: 'L. A. Sazanov, “Structure of respiratory complex I: ‘Minimal’ bacterial and
‘de luxe’ mammalian versions,” in Mechanisms of primary energy transduction
in biology , M. Wikström, Ed. Royal Society of Chemistry, 2017, pp. 25–59.'
ista: 'Sazanov LA. 2017.Structure of respiratory complex I: “Minimal” bacterial
and “de luxe” mammalian versions. In: Mechanisms of primary energy transduction
in biology . , 25–59.'
mla: 'Sazanov, Leonid A. “Structure of Respiratory Complex I: ‘Minimal’ Bacterial
and ‘de Luxe’ Mammalian Versions.” Mechanisms of Primary Energy Transduction
in Biology , edited by Mårten Wikström, Royal Society of Chemistry, 2017,
pp. 25–59, doi:10.1039/9781788010405-00025.'
short: L.A. Sazanov, in:, M. Wikström (Ed.), Mechanisms of Primary Energy Transduction
in Biology , Royal Society of Chemistry, 2017, pp. 25–59.
corr_author: '1'
date_created: 2018-12-11T11:46:30Z
date_published: 2017-11-29T00:00:00Z
date_updated: 2024-10-09T20:58:14Z
day: '29'
department:
- _id: LeSa
doi: 10.1039/9781788010405-00025
editor:
- first_name: Mårten
full_name: Wikström, Mårten
last_name: Wikström
language:
- iso: eng
month: '11'
oa_version: None
page: 25 - 59
publication: 'Mechanisms of primary energy transduction in biology '
publication_identifier:
isbn:
- 978-1-78262-865-1
publication_status: published
publisher: Royal Society of Chemistry
publist_id: '7379'
quality_controlled: '1'
series_title: 'Mechanisms of Primary Energy Transduction in Biology '
status: public
title: 'Structure of respiratory complex I: “Minimal” bacterial and “de luxe” mammalian
versions'
type: book_chapter
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
year: '2017'
...
---
_id: '447'
abstract:
- lang: eng
text: We consider last passage percolation (LPP) models with exponentially distributed
random variables, which are linked to the totally asymmetric simple exclusion
process (TASEP). The competition interface for LPP was introduced and studied
in Ferrari and Pimentel (2005a) for cases where the corresponding exclusion process
had a rarefaction fan. Here we consider situations with a shock and determine
the law of the fluctuations of the competition interface around its deter- ministic
law of large number position. We also study the multipoint distribution of the
LPP around the shock, extending our one-point result of Ferrari and Nejjar (2015).
article_processing_charge: No
article_type: original
author:
- first_name: Patrik
full_name: Ferrari, Patrik
last_name: Ferrari
- first_name: Peter
full_name: Nejjar, Peter
id: 4BF426E2-F248-11E8-B48F-1D18A9856A87
last_name: Nejjar
citation:
ama: Ferrari P, Nejjar P. Fluctuations of the competition interface in presence
of shocks. Revista Latino-Americana de Probabilidade e Estatística. 2017;9:299-325.
doi:10.30757/ALEA.v14-17
apa: Ferrari, P., & Nejjar, P. (2017). Fluctuations of the competition interface
in presence of shocks. Revista Latino-Americana de Probabilidade e Estatística.
Instituto Nacional de Matematica Pura e Aplicada. https://doi.org/10.30757/ALEA.v14-17
chicago: Ferrari, Patrik, and Peter Nejjar. “Fluctuations of the Competition Interface
in Presence of Shocks.” Revista Latino-Americana de Probabilidade e Estatística.
Instituto Nacional de Matematica Pura e Aplicada, 2017. https://doi.org/10.30757/ALEA.v14-17.
ieee: P. Ferrari and P. Nejjar, “Fluctuations of the competition interface in presence
of shocks,” Revista Latino-Americana de Probabilidade e Estatística, vol.
9. Instituto Nacional de Matematica Pura e Aplicada, pp. 299–325, 2017.
ista: Ferrari P, Nejjar P. 2017. Fluctuations of the competition interface in presence
of shocks. Revista Latino-Americana de Probabilidade e Estatística. 9, 299–325.
mla: Ferrari, Patrik, and Peter Nejjar. “Fluctuations of the Competition Interface
in Presence of Shocks.” Revista Latino-Americana de Probabilidade e Estatística,
vol. 9, Instituto Nacional de Matematica Pura e Aplicada, 2017, pp. 299–325, doi:10.30757/ALEA.v14-17.
short: P. Ferrari, P. Nejjar, Revista Latino-Americana de Probabilidade e Estatística
9 (2017) 299–325.
corr_author: '1'
date_created: 2018-12-11T11:46:31Z
date_published: 2017-03-23T00:00:00Z
date_updated: 2025-09-18T10:02:36Z
day: '23'
department:
- _id: LaEr
- _id: JaMa
doi: 10.30757/ALEA.v14-17
ec_funded: 1
external_id:
isi:
- '000404011700017'
intvolume: ' 9'
isi: 1
language:
- iso: eng
main_file_link:
- open_access: '1'
url: http://alea.impa.br/articles/v14/14-17.pdf
month: '03'
oa: 1
oa_version: Submitted Version
page: 299 - 325
project:
- _id: 258DCDE6-B435-11E9-9278-68D0E5697425
call_identifier: FP7
grant_number: '338804'
name: Random matrices, universality and disordered quantum systems
publication: Revista Latino-Americana de Probabilidade e Estatística
publication_status: published
publisher: Instituto Nacional de Matematica Pura e Aplicada
publist_id: '7376'
quality_controlled: '1'
scopus_import: '1'
status: public
title: Fluctuations of the competition interface in presence of shocks
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 9
year: '2017'
...
---
_id: '452'
abstract:
- lang: eng
text: 'Spinning tops and yo-yos have long fascinated cultures around the world with
their unexpected, graceful motions that seemingly elude gravity. Yet, due to the
exceeding difficulty of creating stably spinning objects of asymmetric shape in
a manual trial-and-error process, there has been little departure from rotationally
symmetric designs. With modern 3D printing technologies, however, we can manufacture
shapes of almost unbounded complexity at the press of a button, shifting this
design complexity toward computation. In this article, we describe an algorithm
to generate designs for spinning objects by optimizing their mass distribution:
as input, the user provides a solid 3D model and a desired axis of rotation. Our
approach then modifies the interior mass distribution such that the principal
directions of the moment of inertia align with the target rotation frame. To create
voids inside the model, we represent its volume with an adaptive multiresolution
voxelization and optimize the discrete voxel fill values using a continuous, nonlinear
formulation. We further optimize for rotational stability by maximizing the dominant
principal moment. Our method is well-suited for a variety of 3D printed models,
ranging from characters to abstract shapes. We demonstrate tops and yo-yos that
spin surprisingly stably despite their asymmetric appearance.'
acknowledgement: "This project was supported in part by the ERC Starting Grant iModel
(StG-2012-306877). Emily Whiting was supported by the ETH Zurich/Marie Curie COFUND
Postdoctoral Fellowship. \r\nFirst and foremost, we would like to thank our editor
Steve Marschner for his invaluable feedback. We were fortunate to get further help
from Maurizio Nitti for model design, Romain Prévost for Make-It-Stand comparisons,
Alexander Sorkine-Hornung, Kaan Yücer, and Changil Kim for video and photo assistance,
Ronnie Gänsli for metal casting, Alec Jacobson for the posed Elephant and Armadillo
models, and Romain Prévost and Amit Bermano for print preparation. Model sources
include: Woven Ring: generated by “Sculpture Generator 1” by Carlo H. Séquin, UC
Berkeley; Elephant: De Espona model library, courtesy of Robert Sumner; T-Rex: TurboSquid;
Armadillo: Stanford Computer Graphics Laboratory; and Utah Teapot: Martin Newell,
University of Utah. "
article_processing_charge: No
article_type: original
author:
- first_name: Moritz
full_name: Bächer, Moritz
last_name: Bächer
- first_name: Bernd
full_name: Bickel, Bernd
id: 49876194-F248-11E8-B48F-1D18A9856A87
last_name: Bickel
orcid: 0000-0001-6511-9385
- first_name: Emily
full_name: Whiting, Emily
last_name: Whiting
- first_name: Olga
full_name: Sorkine Hornung, Olga
last_name: Sorkine Hornung
citation:
ama: 'Bächer M, Bickel B, Whiting E, Sorkine Hornung O. Spin it: Optimizing moment
of inertia for spinnable objects. Communications of the ACM. 2017;60(8):92-99.
doi:10.1145/3068766'
apa: 'Bächer, M., Bickel, B., Whiting, E., & Sorkine Hornung, O. (2017). Spin
it: Optimizing moment of inertia for spinnable objects. Communications of the
ACM. ACM. https://doi.org/10.1145/3068766'
chicago: 'Bächer, Moritz, Bernd Bickel, Emily Whiting, and Olga Sorkine Hornung.
“Spin It: Optimizing Moment of Inertia for Spinnable Objects.” Communications
of the ACM. ACM, 2017. https://doi.org/10.1145/3068766.'
ieee: 'M. Bächer, B. Bickel, E. Whiting, and O. Sorkine Hornung, “Spin it: Optimizing
moment of inertia for spinnable objects,” Communications of the ACM, vol.
60, no. 8. ACM, pp. 92–99, 2017.'
ista: 'Bächer M, Bickel B, Whiting E, Sorkine Hornung O. 2017. Spin it: Optimizing
moment of inertia for spinnable objects. Communications of the ACM. 60(8), 92–99.'
mla: 'Bächer, Moritz, et al. “Spin It: Optimizing Moment of Inertia for Spinnable
Objects.” Communications of the ACM, vol. 60, no. 8, ACM, 2017, pp. 92–99,
doi:10.1145/3068766.'
short: M. Bächer, B. Bickel, E. Whiting, O. Sorkine Hornung, Communications of the
ACM 60 (2017) 92–99.
date_created: 2018-12-11T11:46:33Z
date_published: 2017-08-01T00:00:00Z
date_updated: 2025-08-05T14:20:24Z
day: '01'
department:
- _id: BeBi
doi: 10.1145/3068766
intvolume: ' 60'
issue: '8'
language:
- iso: eng
month: '08'
oa_version: None
page: 92 - 99
publication: Communications of the ACM
publication_status: published
publisher: ACM
publist_id: '7370'
quality_controlled: '1'
related_material:
record:
- id: '2080'
relation: earlier_version
status: public
scopus_import: '1'
status: public
title: 'Spin it: Optimizing moment of inertia for spinnable objects'
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 60
year: '2017'
...
---
OA_place: publisher
OA_type: hybrid
_id: '453'
abstract:
- lang: eng
text: Most kinesin motors move in only one direction along microtubules. Members
of the kinesin-5 subfamily were initially described as unidirectional plus-end-directed
motors and shown to produce piconewton forces. However, some fungal kinesin-5
motors are bidirectional. The force production of a bidirectional kinesin-5 has
not yet been measured. Therefore, it remains unknown whether the mechanism of
the unconventional minus-end-directed motility differs fundamentally from that
of plus-end-directed stepping. Using force spectroscopy, we have measured here
the forces that ensembles of purified budding yeast kinesin-5 Cin8 produce in
microtubule gliding assays in both plus- and minus-end direction. Correlation
analysis of pause forces demonstrated that individual Cin8 molecules produce additive
forces in both directions of movement. In ensembles, Cin8 motors were able to
produce single-motor forces up to a magnitude of ∼1.5 pN. Hence, these properties
appear to be conserved within the kinesin-5 subfamily. Force production was largely
independent of the directionality of movement, indicating similarities between
the motility mechanisms for both directions. These results provide constraints
for the development of models for the bidirectional motility mechanism of fission
yeast kinesin-5 and provide insight into the function of this mitotic motor.
acknowledgement: 'The plasmid for full-length kinesin-1 was a gift from G. Holzwarth
and J. Macosko with permission from J. Howard. We thank I. Lueke and N. I. Cade
for technical assistance. G.P. thanks the Francis Crick Institute, and in particular
the Surrey and Salbreux groups, for their hospitality during his sabbatical stay,
as well as Imperial College London for making it possible. This work was supported
by the Francis Crick Institute, which receives its core funding from Cancer Research
UK (FC001163), the United Kingdom Medical Research Council (FC001163), and the Wellcome
Trust (FC001163), and by Imperial College London. J.R. was also supported by a Sir
Henry Wellcome Postdoctoral Fellowship (100145/Z/12/Z) and T.S. by the European
Research Council (Advanced Grant, project 323042). '
article_processing_charge: No
article_type: original
author:
- first_name: Todd
full_name: Fallesen, Todd
last_name: Fallesen
- first_name: Johanna
full_name: Roostalu, Johanna
last_name: Roostalu
- first_name: Christian F
full_name: Düllberg, Christian F
id: 459064DC-F248-11E8-B48F-1D18A9856A87
last_name: Düllberg
orcid: 0000-0001-6335-9748
- first_name: Gunnar
full_name: Pruessner, Gunnar
last_name: Pruessner
- first_name: Thomas
full_name: Surrey, Thomas
last_name: Surrey
citation:
ama: Fallesen T, Roostalu J, Düllberg CF, Pruessner G, Surrey T. Ensembles of bidirectional
kinesin Cin8 produce additive forces in both directions of movement. Biophysical
Journal. 2017;113(9):2055-2067. doi:10.1016/j.bpj.2017.09.006
apa: Fallesen, T., Roostalu, J., Düllberg, C. F., Pruessner, G., & Surrey, T.
(2017). Ensembles of bidirectional kinesin Cin8 produce additive forces in both
directions of movement. Biophysical Journal. Biophysical Society. https://doi.org/10.1016/j.bpj.2017.09.006
chicago: Fallesen, Todd, Johanna Roostalu, Christian F Düllberg, Gunnar Pruessner,
and Thomas Surrey. “Ensembles of Bidirectional Kinesin Cin8 Produce Additive Forces
in Both Directions of Movement.” Biophysical Journal. Biophysical Society,
2017. https://doi.org/10.1016/j.bpj.2017.09.006.
ieee: T. Fallesen, J. Roostalu, C. F. Düllberg, G. Pruessner, and T. Surrey, “Ensembles
of bidirectional kinesin Cin8 produce additive forces in both directions of movement,”
Biophysical Journal, vol. 113, no. 9. Biophysical Society, pp. 2055–2067,
2017.
ista: Fallesen T, Roostalu J, Düllberg CF, Pruessner G, Surrey T. 2017. Ensembles
of bidirectional kinesin Cin8 produce additive forces in both directions of movement.
Biophysical Journal. 113(9), 2055–2067.
mla: Fallesen, Todd, et al. “Ensembles of Bidirectional Kinesin Cin8 Produce Additive
Forces in Both Directions of Movement.” Biophysical Journal, vol. 113,
no. 9, Biophysical Society, 2017, pp. 2055–67, doi:10.1016/j.bpj.2017.09.006.
short: T. Fallesen, J. Roostalu, C.F. Düllberg, G. Pruessner, T. Surrey, Biophysical
Journal 113 (2017) 2055–2067.
date_created: 2018-12-11T11:46:33Z
date_published: 2017-11-07T00:00:00Z
date_updated: 2025-08-05T14:08:52Z
day: '07'
ddc:
- '570'
department:
- _id: MaLo
doi: 10.1016/j.bpj.2017.09.006
external_id:
pmid:
- '29117528'
file:
- access_level: open_access
checksum: 99a2474088e20ac74b1882c4fbbb45b1
content_type: application/pdf
creator: system
date_created: 2018-12-12T10:14:03Z
date_updated: 2020-07-14T12:46:31Z
file_id: '5052'
file_name: IST-2018-965-v1+1_2017_Duellberg_Ensembles_of.pdf
file_size: 977192
relation: main_file
file_date_updated: 2020-07-14T12:46:31Z
has_accepted_license: '1'
intvolume: ' 113'
issue: '9'
language:
- iso: eng
month: '11'
oa: 1
oa_version: Published Version
page: 2055 - 2067
pmid: 1
publication: Biophysical Journal
publication_identifier:
eissn:
- 1542-0086
issn:
- 0006-3495
publication_status: published
publisher: Biophysical Society
publist_id: '7369'
pubrep_id: '965'
quality_controlled: '1'
scopus_import: '1'
status: public
title: Ensembles of bidirectional kinesin Cin8 produce additive forces in both directions
of movement
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: 113
year: '2017'
...
---
_id: '459'
abstract:
- lang: eng
text: The social insects bees, wasps, ants, and termites are species-rich, occur
in many habitats, and often constitute a large part of the biomass. Many are also
invasive, including species of termites, the red imported fire ant, and the Argentine
ant. While invasive social insects have been a problem in Southern Europe for
some time, Central Europa was free of invasive ant species until recently because
most ants are adapted to warmer climates. Only in the 1990s, did Lasius neglectus,
a close relative of the common black garden ant, arrive in Germany. First described
in 1990 based on individuals collected in Budapest, the species has since been
detected for example in France, Germany, Spain, England, and Kyrgyzstan. The species
is spread with soil during construction work or plantings, and L. neglectus therefore
is often found in parks and botanical gardens. Another invasive ant now spreading
in southern Germany is Formica fuscocinerea, which occurs along rivers, including
in the sandy floodplains of the river Isar. As is typical of pioneer species,
F. fuscocinerea quickly becomes extremely abundant and therefore causes problems
for example on playgrounds in Munich. All invasive ant species are characterized
by cooperation across nests, leading to strongly interconnected, very large super-colonies.
The resulting dominance results in the extinction of native ant species as well
as other arthropod species and thus in the reduction of biodiversity.
article_processing_charge: No
author:
- first_name: Sylvia
full_name: Cremer, Sylvia
id: 2F64EC8C-F248-11E8-B48F-1D18A9856A87
last_name: Cremer
orcid: 0000-0002-2193-3868
citation:
ama: 'Cremer S. Invasive Ameisen in Europa: Wie sie sich ausbreiten und die heimische
Fauna verändern. Rundgespräche Forum Ökologie. 2017;46:105-116.'
apa: 'Cremer, S. (2017). Invasive Ameisen in Europa: Wie sie sich ausbreiten und
die heimische Fauna verändern. Rundgespräche Forum Ökologie. Verlag Dr.
Friedrich Pfeil.'
chicago: 'Cremer, Sylvia. “Invasive Ameisen in Europa: Wie Sie Sich Ausbreiten Und
Die Heimische Fauna Verändern.” Rundgespräche Forum Ökologie. Verlag Dr.
Friedrich Pfeil, 2017.'
ieee: 'S. Cremer, “Invasive Ameisen in Europa: Wie sie sich ausbreiten und die heimische
Fauna verändern,” Rundgespräche Forum Ökologie, vol. 46. Verlag Dr. Friedrich
Pfeil, pp. 105–116, 2017.'
ista: 'Cremer S. 2017. Invasive Ameisen in Europa: Wie sie sich ausbreiten und die
heimische Fauna verändern. Rundgespräche Forum Ökologie. 46, 105–116.'
mla: 'Cremer, Sylvia. “Invasive Ameisen in Europa: Wie Sie Sich Ausbreiten Und Die
Heimische Fauna Verändern.” Rundgespräche Forum Ökologie, vol. 46, Verlag
Dr. Friedrich Pfeil, 2017, pp. 105–16.'
short: S. Cremer, Rundgespräche Forum Ökologie 46 (2017) 105–116.
corr_author: '1'
date_created: 2018-12-11T11:46:35Z
date_published: 2017-04-04T00:00:00Z
date_updated: 2024-10-09T20:58:13Z
day: '04'
ddc:
- '592'
department:
- _id: SyCr
file:
- access_level: open_access
checksum: 4919baf9050415ca151fe22497379f78
content_type: application/pdf
creator: system
date_created: 2018-12-12T10:15:52Z
date_updated: 2020-07-14T12:46:32Z
file_id: '5175'
file_name: IST-2018-962-v1+1_044676698_07_Cremer__Invasive_Ameisen_in_Europa_...__BY-ND_.pdf
file_size: 1711131
relation: main_file
file_date_updated: 2020-07-14T12:46:32Z
has_accepted_license: '1'
intvolume: ' 46'
language:
- iso: eng
license: https://creativecommons.org/licenses/by-nd/4.0/
month: '04'
oa: 1
oa_version: Published Version
page: 105 - 116
publication: Rundgespräche Forum Ökologie
publication_identifier:
issn:
- 2366-2875
publication_status: published
publisher: Verlag Dr. Friedrich Pfeil
publist_id: '7362'
pubrep_id: '962'
quality_controlled: '1'
status: public
title: 'Invasive Ameisen in Europa: Wie sie sich ausbreiten und die heimische Fauna
verändern'
tmp:
image: /image/cc_by_nd.png
legal_code_url: https://creativecommons.org/licenses/by-nd/4.0/legalcode
name: Creative Commons Attribution-NoDerivatives 4.0 International (CC BY-ND 4.0)
short: CC BY-ND (4.0)
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 46
year: '2017'
...
---
OA_place: repository
OA_type: green
_id: '12193'
abstract:
- lang: eng
text: DNA methylation regulates eukaryotic gene expression and is extensively reprogrammed
during animal development. However, whether developmental methylation reprogramming
during the sporophytic life cycle of flowering plants regulates genes is presently
unknown. Here we report a distinctive gene-targeted RNA-directed DNA methylation
(RdDM) activity in the Arabidopsis thaliana male sexual lineage that regulates
gene expression in meiocytes. Loss of sexual-lineage-specific RdDM causes mis-splicing
of the MPS1 gene (also known as PRD2), thereby disrupting meiosis. Our results
establish a regulatory paradigm in which de novo methylation creates a cell-lineage-specific
epigenetic signature that controls gene expression and contributes to cellular
function in flowering plants.
acknowledgement: We thank Daniel Zilberman for intellectual contributions to this
work and assistance with manuscript preparation. We also thank Caroline Dean, Kirsten
Bomblies, Vinod Kumar, Siobhan Brady and Sophien Kamoun for comments on the manuscript,
Hugh Dickinson and Josephine Hellberg for developing the meiocyte isolation method,
Giles Oldroyd for the pGWB13-Bar vector, Elisa Fiume for the pMDC107-NTF vector,
Matthew Hartley, Matthew Couchman and Tjelvar Sten Gunnar Olsson for bioinformatics
support, and the John Innes Centre Bioimaging Facility (Elaine Barclay and Grant
Calder) for their assistance with microscopy. This work was funded by a Biotechnology
and Biological Sciences Research Council (BBSRC) David Phillips Fellowship (BBL0250431)
to X.F., a BBSRC grant (BBM01973X1) to J.H., and a Sainsbury PhD Studentship to
J.W.
article_processing_charge: No
article_type: original
author:
- first_name: James
full_name: Walker, James
last_name: Walker
- first_name: Hongbo
full_name: Gao, Hongbo
last_name: Gao
- first_name: Jingyi
full_name: Zhang, Jingyi
last_name: Zhang
- first_name: Billy
full_name: Aldridge, Billy
last_name: Aldridge
- first_name: Martin
full_name: Vickers, Martin
last_name: Vickers
- first_name: James D.
full_name: Higgins, James D.
last_name: Higgins
- first_name: Xiaoqi
full_name: Feng, Xiaoqi
id: e0164712-22ee-11ed-b12a-d80fcdf35958
last_name: Feng
orcid: 0000-0002-4008-1234
citation:
ama: Walker J, Gao H, Zhang J, et al. Sexual-lineage-specific DNA methylation regulates
meiosis in Arabidopsis. Nature Genetics. 2017;50(1):130-137. doi:10.1038/s41588-017-0008-5
apa: Walker, J., Gao, H., Zhang, J., Aldridge, B., Vickers, M., Higgins, J. D.,
& Feng, X. (2017). Sexual-lineage-specific DNA methylation regulates meiosis
in Arabidopsis. Nature Genetics. Nature Research. https://doi.org/10.1038/s41588-017-0008-5
chicago: Walker, James, Hongbo Gao, Jingyi Zhang, Billy Aldridge, Martin Vickers,
James D. Higgins, and Xiaoqi Feng. “Sexual-Lineage-Specific DNA Methylation Regulates
Meiosis in Arabidopsis.” Nature Genetics. Nature Research, 2017. https://doi.org/10.1038/s41588-017-0008-5.
ieee: J. Walker et al., “Sexual-lineage-specific DNA methylation regulates
meiosis in Arabidopsis,” Nature Genetics, vol. 50, no. 1. Nature Research,
pp. 130–137, 2017.
ista: Walker J, Gao H, Zhang J, Aldridge B, Vickers M, Higgins JD, Feng X. 2017.
Sexual-lineage-specific DNA methylation regulates meiosis in Arabidopsis. Nature
Genetics. 50(1), 130–137.
mla: Walker, James, et al. “Sexual-Lineage-Specific DNA Methylation Regulates Meiosis
in Arabidopsis.” Nature Genetics, vol. 50, no. 1, Nature Research, 2017,
pp. 130–37, doi:10.1038/s41588-017-0008-5.
short: J. Walker, H. Gao, J. Zhang, B. Aldridge, M. Vickers, J.D. Higgins, X. Feng,
Nature Genetics 50 (2017) 130–137.
date_created: 2023-01-16T09:18:05Z
date_published: 2017-12-18T00:00:00Z
date_updated: 2026-03-19T10:51:18Z
day: '18'
department:
- _id: XiFe
doi: 10.1038/s41588-017-0008-5
extern: '1'
external_id:
pmid:
- '29255257'
intvolume: ' 50'
issue: '1'
keyword:
- Genetics
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7611288/
month: '12'
oa: 1
oa_version: Submitted Version
page: 130-137
pmid: 1
publication: Nature Genetics
publication_identifier:
eissn:
- 1546-1718
issn:
- 1061-4036
publication_status: published
publisher: Nature Research
quality_controlled: '1'
scopus_import: '1'
status: public
title: Sexual-lineage-specific DNA methylation regulates meiosis in Arabidopsis
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 50
year: '2017'
...
---
_id: '638'
abstract:
- lang: eng
text: "This book constitutes the refereed proceedings of the 9th InternationalWorkshop
on Numerical Software Verification, NSV 2016, held in Toronto, ON, Canada in July
2011 - colocated with CAV 2016, the 28th International Conference on Computer
Aided Verification.\r\nThe NSV workshop is dedicated to the development of logical
and mathematical techniques for the reasoning about programmability and reliability."
alternative_title:
- LNCS
article_processing_charge: No
citation:
ama: Bogomolov S, Martel M, Prabhakar P, eds. Numerical Software Verification.
Vol 10152. Springer; 2017. doi:10.1007/978-3-319-54292-8
apa: 'Bogomolov, S., Martel, M., & Prabhakar, P. (Eds.). (2017). Numerical
Software Verification (Vol. 10152). Presented at the NSV: Numerical Software
Verification, Toronto, ON, Canada: Springer. https://doi.org/10.1007/978-3-319-54292-8'
chicago: Bogomolov, Sergiy, Matthieu Martel, and Pavithra Prabhakar, eds. Numerical
Software Verification. Vol. 10152. Springer, 2017. https://doi.org/10.1007/978-3-319-54292-8.
ieee: S. Bogomolov, M. Martel, and P. Prabhakar, Eds., Numerical Software Verification,
vol. 10152. Springer, 2017.
ista: Bogomolov S, Martel M, Prabhakar P eds. 2017. Numerical Software Verification,
Springer,p.
mla: Bogomolov, Sergiy, et al., editors. Numerical Software Verification.
Vol. 10152, Springer, 2017, doi:10.1007/978-3-319-54292-8.
short: S. Bogomolov, M. Martel, P. Prabhakar, eds., Numerical Software Verification,
Springer, 2017.
conference:
end_date: 2016-07-18
location: Toronto, ON, Canada
name: 'NSV: Numerical Software Verification'
start_date: 2016-07-17
date_created: 2018-12-11T11:47:38Z
date_published: 2017-01-01T00:00:00Z
date_updated: 2026-03-31T12:28:01Z
day: '01'
department:
- _id: ToHe
doi: 10.1007/978-3-319-54292-8
editor:
- first_name: Sergiy
full_name: Bogomolov, Sergiy
id: 369D9A44-F248-11E8-B48F-1D18A9856A87
last_name: Bogomolov
orcid: 0000-0002-0686-0365
- first_name: Matthieu
full_name: Martel, Matthieu
last_name: Martel
- first_name: Pavithra
full_name: Prabhakar, Pavithra
last_name: Prabhakar
intvolume: ' 10152'
language:
- iso: eng
month: '01'
oa_version: None
publication_identifier:
eisbn:
- 978-3-319-54292-8
issn:
- 0302-9743
publication_status: published
publisher: Springer
publist_id: '7150'
quality_controlled: '1'
status: public
title: Numerical Software Verification
type: conference_editor
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 10152
year: '2017'
...
---
_id: '1194'
abstract:
- lang: eng
text: 'Termination is one of the basic liveness properties, and we study the termination
problem for probabilistic programs with real-valued variables. Previous works
focused on the qualitative problem that asks whether an input program terminates
with probability~1 (almost-sure termination). A powerful approach for this qualitative
problem is the notion of ranking supermartingales with respect to a given set
of invariants. The quantitative problem (probabilistic termination) asks for bounds
on the termination probability. A fundamental and conceptual drawback of the existing
approaches to address probabilistic termination is that even though the supermartingales
consider the probabilistic behavior of the programs, the invariants are obtained
completely ignoring the probabilistic aspect. In this work we address the probabilistic
termination problem for linear-arithmetic probabilistic programs with nondeterminism.
We define the notion of {\em stochastic invariants}, which are constraints along
with a probability bound that the constraints hold. We introduce a concept of
{\em repulsing supermartingales}. First, we show that repulsing supermartingales
can be used to obtain bounds on the probability of the stochastic invariants.
Second, we show the effectiveness of repulsing supermartingales in the following
three ways: (1)~With a combination of ranking and repulsing supermartingales we
can compute lower bounds on the probability of termination; (2)~repulsing supermartingales
provide witnesses for refutation of almost-sure termination; and (3)~with a combination
of ranking and repulsing supermartingales we can establish persistence properties
of probabilistic programs. We also present results on related computational problems
and an experimental evaluation of our approach on academic examples. '
alternative_title:
- ACM SIGPLAN Notices
article_processing_charge: No
arxiv: 1
author:
- first_name: Krishnendu
full_name: Chatterjee, Krishnendu
id: 2E5DCA20-F248-11E8-B48F-1D18A9856A87
last_name: Chatterjee
orcid: 0000-0002-4561-241X
- first_name: Petr
full_name: Novotny, Petr
id: 3CC3B868-F248-11E8-B48F-1D18A9856A87
last_name: Novotny
- first_name: Djordje
full_name: Zikelic, Djordje
last_name: Zikelic
citation:
ama: 'Chatterjee K, Novotný P, Zikelic D. Stochastic invariants for probabilistic
termination. In: Vol 52. ACM; 2017:145-160. doi:10.1145/3009837.3009873'
apa: 'Chatterjee, K., Novotný, P., & Zikelic, D. (2017). Stochastic invariants
for probabilistic termination (Vol. 52, pp. 145–160). Presented at the POPL: Principles
of Programming Languages, Paris, France: ACM. https://doi.org/10.1145/3009837.3009873'
chicago: Chatterjee, Krishnendu, Petr Novotný, and Djordje Zikelic. “Stochastic
Invariants for Probabilistic Termination,” 52:145–60. ACM, 2017. https://doi.org/10.1145/3009837.3009873.
ieee: 'K. Chatterjee, P. Novotný, and D. Zikelic, “Stochastic invariants for probabilistic
termination,” presented at the POPL: Principles of Programming Languages, Paris,
France, 2017, vol. 52, no. 1, pp. 145–160.'
ista: 'Chatterjee K, Novotný P, Zikelic D. 2017. Stochastic invariants for probabilistic
termination. POPL: Principles of Programming Languages, ACM SIGPLAN Notices, vol.
52, 145–160.'
mla: Chatterjee, Krishnendu, et al. Stochastic Invariants for Probabilistic Termination.
Vol. 52, no. 1, ACM, 2017, pp. 145–60, doi:10.1145/3009837.3009873.
short: K. Chatterjee, P. Novotný, D. Zikelic, in:, ACM, 2017, pp. 145–160.
conference:
end_date: 2017-01-21
location: Paris, France
name: 'POPL: Principles of Programming Languages'
start_date: 2017-01-15
date_created: 2018-12-11T11:50:39Z
date_published: 2017-01-01T00:00:00Z
date_updated: 2026-04-07T13:27:56Z
day: '01'
department:
- _id: KrCh
doi: 10.1145/3009837.3009873
ec_funded: 1
external_id:
arxiv:
- '1611.01063'
isi:
- '000408311200013'
intvolume: ' 52'
isi: 1
issue: '1'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/abs/1611.01063
month: '01'
oa: 1
oa_version: Submitted Version
page: 145 - 160
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
- _id: 2581B60A-B435-11E9-9278-68D0E5697425
call_identifier: FP7
grant_number: '279307'
name: 'Quantitative Graph Games: Theory and Applications'
- _id: 25681D80-B435-11E9-9278-68D0E5697425
call_identifier: FP7
grant_number: '291734'
name: International IST Postdoc Fellowship Programme
publication_identifier:
issn:
- 0730-8566
publication_status: published
publisher: ACM
publist_id: '6157'
quality_controlled: '1'
related_material:
record:
- id: '14539'
relation: dissertation_contains
status: public
scopus_import: '1'
status: public
title: Stochastic invariants for probabilistic termination
type: conference
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 52
year: '2017'
...
---
_id: '637'
abstract:
- lang: eng
text: For many cryptographic primitives, it is relatively easy to achieve selective
security (where the adversary commits a-priori to some of the choices to be made
later in the attack) but appears difficult to achieve the more natural notion
of adaptive security (where the adversary can make all choices on the go as the
attack progresses). A series of several recent works shows how to cleverly achieve
adaptive security in several such scenarios including generalized selective decryption
(Panjwani, TCC ’07 and Fuchsbauer et al., CRYPTO ’15), constrained PRFs (Fuchsbauer
et al., ASIACRYPT ’14), and Yao garbled circuits (Jafargholi and Wichs, TCC ’16b).
Although the above works expressed vague intuition that they share a common technique,
the connection was never made precise. In this work we present a new framework
that connects all of these works and allows us to present them in a unified and
simplified fashion. Moreover, we use the framework to derive a new result for
adaptively secure secret sharing over access structures defined via monotone circuits.
We envision that further applications will follow in the future. Underlying our
framework is the following simple idea. It is well known that selective security,
where the adversary commits to n-bits of information about his future choices,
automatically implies adaptive security at the cost of amplifying the adversary’s
advantage by a factor of up to 2n. However, in some cases the proof of selective
security proceeds via a sequence of hybrids, where each pair of adjacent hybrids
locally only requires some smaller partial information consisting of m ≪ n bits.
The partial information needed might be completely different between different
pairs of hybrids, and if we look across all the hybrids we might rely on the entire
n-bit commitment. Nevertheless, the above is sufficient to prove adaptive security,
at the cost of amplifying the adversary’s advantage by a factor of only 2m ≪ 2n.
In all of our examples using the above framework, the different hybrids are captured
by some sort of a graph pebbling game and the amount of information that the adversary
needs to commit to in each pair of hybrids is bounded by the maximum number of
pebbles in play at any point in time. Therefore, coming up with better strategies
for proving adaptive security translates to various pebbling strategies for different
types of graphs.
alternative_title:
- LNCS
article_processing_charge: No
author:
- first_name: Zahra
full_name: Jafargholi, Zahra
last_name: Jafargholi
- first_name: Chethan
full_name: Kamath Hosdurg, Chethan
id: 4BD3F30E-F248-11E8-B48F-1D18A9856A87
last_name: Kamath Hosdurg
orcid: 0009-0006-6812-7317
- first_name: Karen
full_name: Klein, Karen
id: 3E83A2F8-F248-11E8-B48F-1D18A9856A87
last_name: Klein
- first_name: Ilan
full_name: Komargodski, Ilan
last_name: Komargodski
- first_name: Krzysztof Z
full_name: Pietrzak, Krzysztof Z
id: 3E04A7AA-F248-11E8-B48F-1D18A9856A87
last_name: Pietrzak
orcid: 0000-0002-9139-1654
- first_name: Daniel
full_name: Wichs, Daniel
last_name: Wichs
citation:
ama: 'Jafargholi Z, Kamath Hosdurg C, Klein K, Komargodski I, Pietrzak KZ, Wichs
D. Be adaptive avoid overcommitting. In: Katz J, Shacham H, eds. Vol 10401. Springer;
2017:133-163. doi:10.1007/978-3-319-63688-7_5'
apa: 'Jafargholi, Z., Kamath Hosdurg, C., Klein, K., Komargodski, I., Pietrzak,
K. Z., & Wichs, D. (2017). Be adaptive avoid overcommitting. In J. Katz &
H. Shacham (Eds.) (Vol. 10401, pp. 133–163). Presented at the CRYPTO: Cryptology,
Santa Barbara, CA, United States: Springer. https://doi.org/10.1007/978-3-319-63688-7_5'
chicago: Jafargholi, Zahra, Chethan Kamath Hosdurg, Karen Klein, Ilan Komargodski,
Krzysztof Z Pietrzak, and Daniel Wichs. “Be Adaptive Avoid Overcommitting.” edited
by Jonathan Katz and Hovav Shacham, 10401:133–63. Springer, 2017. https://doi.org/10.1007/978-3-319-63688-7_5.
ieee: 'Z. Jafargholi, C. Kamath Hosdurg, K. Klein, I. Komargodski, K. Z. Pietrzak,
and D. Wichs, “Be adaptive avoid overcommitting,” presented at the CRYPTO: Cryptology,
Santa Barbara, CA, United States, 2017, vol. 10401, pp. 133–163.'
ista: 'Jafargholi Z, Kamath Hosdurg C, Klein K, Komargodski I, Pietrzak KZ, Wichs
D. 2017. Be adaptive avoid overcommitting. CRYPTO: Cryptology, LNCS, vol. 10401,
133–163.'
mla: Jafargholi, Zahra, et al. Be Adaptive Avoid Overcommitting. Edited by
Jonathan Katz and Hovav Shacham, vol. 10401, Springer, 2017, pp. 133–63, doi:10.1007/978-3-319-63688-7_5.
short: Z. Jafargholi, C. Kamath Hosdurg, K. Klein, I. Komargodski, K.Z. Pietrzak,
D. Wichs, in:, J. Katz, H. Shacham (Eds.), Springer, 2017, pp. 133–163.
conference:
end_date: 2017-07-24
location: Santa Barbara, CA, United States
name: 'CRYPTO: Cryptology'
start_date: 2017-07-20
date_created: 2018-12-11T11:47:38Z
date_published: 2017-01-01T00:00:00Z
date_updated: 2026-04-08T07:01:44Z
day: '01'
department:
- _id: KrPi
doi: 10.1007/978-3-319-63688-7_5
ec_funded: 1
editor:
- first_name: Jonathan
full_name: Katz, Jonathan
last_name: Katz
- first_name: Hovav
full_name: Shacham, Hovav
last_name: Shacham
external_id:
isi:
- '000438672600005'
intvolume: ' 10401'
isi: 1
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://eprint.iacr.org/2017/515
month: '01'
oa: 1
oa_version: Submitted Version
page: 133 - 163
project:
- _id: 258AA5B2-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '682815'
name: Teaching Old Crypto New Tricks
publication_identifier:
isbn:
- 978-331963687-0
publication_status: published
publisher: Springer
publist_id: '7151'
quality_controlled: '1'
related_material:
record:
- id: '10035'
relation: dissertation_contains
status: public
scopus_import: '1'
status: public
title: Be adaptive avoid overcommitting
type: conference
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 10401
year: '2017'
...
---
_id: '1001'
abstract:
- lang: eng
text: We present a computational approach for designing CurveUps, curvy shells that
form from an initially flat state. They consist of small rigid tiles that are
tightly held together by two pre-stretched elastic sheets attached to them. Our
method allows the realization of smooth, doubly curved surfaces that can be fabricated
as a flat piece. Once released, the restoring forces of the pre-stretched sheets
support the object to take shape in 3D. CurveUps are structurally stable in their
target configuration. The design process starts with a target surface. Our method
generates a tile layout in 2D and optimizes the distribution, shape, and attachment
areas of the tiles to obtain a configuration that is fabricable and in which the
curved up state closely matches the target. Our approach is based on an efficient
approximate model and a local optimization strategy for an otherwise intractable
nonlinear optimization problem. We demonstrate the effectiveness of our approach
for a wide range of shapes, all realized as physical prototypes.
alternative_title:
- ACM Transactions on Graphics
article_number: '64'
article_processing_charge: No
author:
- first_name: Ruslan
full_name: Guseinov, Ruslan
id: 3AB45EE2-F248-11E8-B48F-1D18A9856A87
last_name: Guseinov
orcid: 0000-0001-9819-5077
- first_name: Eder
full_name: Miguel, Eder
last_name: Miguel
- first_name: Bernd
full_name: Bickel, Bernd
id: 49876194-F248-11E8-B48F-1D18A9856A87
last_name: Bickel
orcid: 0000-0001-6511-9385
citation:
ama: 'Guseinov R, Miguel E, Bickel B. CurveUps: Shaping objects from flat plates
with tension-actuated curvature. In: Vol 36. ACM; 2017. doi:10.1145/3072959.3073709'
apa: 'Guseinov, R., Miguel, E., & Bickel, B. (2017). CurveUps: Shaping objects
from flat plates with tension-actuated curvature (Vol. 36). Presented at the SIGGRAPH:
Special Interest Group on Computer Graphics and Interactive Techniques, Los Angeles,
CA, United States: ACM. https://doi.org/10.1145/3072959.3073709'
chicago: 'Guseinov, Ruslan, Eder Miguel, and Bernd Bickel. “CurveUps: Shaping Objects
from Flat Plates with Tension-Actuated Curvature,” Vol. 36. ACM, 2017. https://doi.org/10.1145/3072959.3073709.'
ieee: 'R. Guseinov, E. Miguel, and B. Bickel, “CurveUps: Shaping objects from flat
plates with tension-actuated curvature,” presented at the SIGGRAPH: Special Interest
Group on Computer Graphics and Interactive Techniques, Los Angeles, CA, United
States, 2017, vol. 36, no. 4.'
ista: 'Guseinov R, Miguel E, Bickel B. 2017. CurveUps: Shaping objects from flat
plates with tension-actuated curvature. SIGGRAPH: Special Interest Group on Computer
Graphics and Interactive Techniques, ACM Transactions on Graphics, vol. 36, 64.'
mla: 'Guseinov, Ruslan, et al. CurveUps: Shaping Objects from Flat Plates with
Tension-Actuated Curvature. Vol. 36, no. 4, 64, ACM, 2017, doi:10.1145/3072959.3073709.'
short: R. Guseinov, E. Miguel, B. Bickel, in:, ACM, 2017.
conference:
end_date: 2017-08-25
location: Los Angeles, CA, United States
name: 'SIGGRAPH: Special Interest Group on Computer Graphics and Interactive Techniques'
start_date: 2017-08-19
date_created: 2018-12-11T11:49:38Z
date_published: 2017-01-01T00:00:00Z
date_updated: 2026-04-08T07:25:22Z
day: '01'
ddc:
- '003'
- '004'
department:
- _id: BeBi
doi: 10.1145/3072959.3073709
ec_funded: 1
external_id:
isi:
- '000406432100032'
file:
- access_level: open_access
content_type: application/pdf
creator: system
date_created: 2018-12-12T10:10:24Z
date_updated: 2018-12-12T10:10:24Z
file_id: '4811'
file_name: IST-2018-1053-v1+1_CurveUp.pdf
file_size: 36159696
relation: main_file
file_date_updated: 2018-12-12T10:10:24Z
has_accepted_license: '1'
intvolume: ' 36'
isi: 1
issue: '4'
language:
- iso: eng
month: '01'
oa: 1
oa_version: Submitted Version
project:
- _id: 25082902-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '645599'
name: Soft-bodied intelligence for Manipulation
- _id: 24F9549A-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '715767'
name: 'MATERIALIZABLE: Intelligent fabrication-oriented Computational Design and
Modeling'
publication_status: published
publisher: ACM
publist_id: '6397'
pubrep_id: '1053'
quality_controlled: '1'
related_material:
record:
- id: '8366'
relation: dissertation_contains
status: public
scopus_import: '1'
status: public
title: 'CurveUps: Shaping objects from flat plates with tension-actuated curvature'
type: conference
user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1
volume: 36
year: '2017'
...
---
_id: '1120'
abstract:
- lang: eng
text: 'The existence of a self-localization transition in the polaron problem has
been under an active debate ever since Landau suggested it 83 years ago. Here
we reveal the self-localization transition for the rotational analogue of the
polaron -- the angulon quasiparticle. We show that, unlike for the polarons, self-localization
of angulons occurs at finite impurity-bath coupling already at the mean-field
level. The transition is accompanied by the spherical-symmetry breaking of the
angulon ground state and a discontinuity in the first derivative of the ground-state
energy. Moreover, the type of the symmetry breaking is dictated by the symmetry
of the microscopic impurity-bath interaction, which leads to a number of distinct
self-localized states. The predicted effects can potentially be addressed in experiments
on cold molecules trapped in superfluid helium droplets and ultracold quantum
gases, as well as on electronic excitations in solids and Bose-Einstein condensates. '
article_number: '033608'
article_processing_charge: No
arxiv: 1
author:
- first_name: Xiang
full_name: Li, Xiang
id: 4B7E523C-F248-11E8-B48F-1D18A9856A87
last_name: Li
- first_name: Robert
full_name: Seiringer, Robert
id: 4AFD0470-F248-11E8-B48F-1D18A9856A87
last_name: Seiringer
orcid: 0000-0002-6781-0521
- first_name: Mikhail
full_name: Lemeshko, Mikhail
id: 37CB05FA-F248-11E8-B48F-1D18A9856A87
last_name: Lemeshko
orcid: 0000-0002-6990-7802
citation:
ama: Li X, Seiringer R, Lemeshko M. Angular self-localization of impurities rotating
in a bosonic bath. Physical Review A. 2017;95(3). doi:10.1103/PhysRevA.95.033608
apa: Li, X., Seiringer, R., & Lemeshko, M. (2017). Angular self-localization
of impurities rotating in a bosonic bath. Physical Review A. American Physical
Society. https://doi.org/10.1103/PhysRevA.95.033608
chicago: Li, Xiang, Robert Seiringer, and Mikhail Lemeshko. “Angular Self-Localization
of Impurities Rotating in a Bosonic Bath.” Physical Review A. American
Physical Society, 2017. https://doi.org/10.1103/PhysRevA.95.033608.
ieee: X. Li, R. Seiringer, and M. Lemeshko, “Angular self-localization of impurities
rotating in a bosonic bath,” Physical Review A, vol. 95, no. 3. American
Physical Society, 2017.
ista: Li X, Seiringer R, Lemeshko M. 2017. Angular self-localization of impurities
rotating in a bosonic bath. Physical Review A. 95(3), 033608.
mla: Li, Xiang, et al. “Angular Self-Localization of Impurities Rotating in a Bosonic
Bath.” Physical Review A, vol. 95, no. 3, 033608, American Physical Society,
2017, doi:10.1103/PhysRevA.95.033608.
short: X. Li, R. Seiringer, M. Lemeshko, Physical Review A 95 (2017).
date_created: 2018-12-11T11:50:15Z
date_published: 2017-03-06T00:00:00Z
date_updated: 2026-04-08T07:26:09Z
day: '06'
department:
- _id: MiLe
- _id: RoSe
doi: 10.1103/PhysRevA.95.033608
ec_funded: 1
external_id:
arxiv:
- '1610.04908'
isi:
- '000395981900009'
intvolume: ' 95'
isi: 1
issue: '3'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/abs/1610.04908
month: '03'
oa: 1
oa_version: Published Version
project:
- _id: 25C6DC12-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '694227'
name: Analysis of quantum many-body systems
- _id: 25C878CE-B435-11E9-9278-68D0E5697425
call_identifier: FWF
grant_number: P27533_N27
name: Structure of the Excitation Spectrum for Many-Body Quantum Systems
- _id: 26031614-B435-11E9-9278-68D0E5697425
call_identifier: FWF
grant_number: P29902
name: Quantum rotations in the presence of a many-body environment
publication: Physical Review A
publication_identifier:
issn:
- 2469-9926
publication_status: published
publisher: American Physical Society
publist_id: '6242'
quality_controlled: '1'
related_material:
record:
- id: '8958'
relation: dissertation_contains
status: public
scopus_import: '1'
status: public
title: Angular self-localization of impurities rotating in a bosonic bath
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 95
year: '2017'
...