---
_id: '1213'
abstract:
- lang: eng
text: Bacterial cytokinesis is commonly initiated by the Z-ring, a dynamic cytoskeletal
structure that assembles at the site of division. Its primary component is FtsZ,
a tubulin-like GTPase, that like its eukaryotic relative forms protein filaments
in the presence of GTP. Since the discovery of the Z-ring 25 years ago, various
models for the role of FtsZ have been suggested. However, important information
about the architecture and dynamics of FtsZ filaments during cytokinesis is still
missing. One reason for this lack of knowledge has been the small size of bacteria,
which has made it difficult to resolve the orientation and dynamics of individual
FtsZ filaments in the Z-ring. While superresolution microscopy experiments have
helped to gain more information about the organization of the Z-ring in the dividing
cell, they were not yet able to elucidate a mechanism of how FtsZ filaments reorganize
during assembly and disassembly of the Z-ring. In this chapter, we explain how
to use an in vitro reconstitution approach to investigate the self-organization
of FtsZ filaments recruited to a biomimetic lipid bilayer by its membrane anchor
FtsA. We show how to perform single-molecule experiments to study the behavior
of individual FtsZ monomers during the constant reorganization of the FtsZ-FtsA
filament network. We describe how to analyze the dynamics of single molecules
and explain why this information can help to shed light onto possible mechanism
of Z-ring constriction. We believe that similar experimental approaches will be
useful to study the mechanism of membrane-based polymerization of other cytoskeletal
systems, not only from prokaryotic but also eukaryotic origin.
acknowledged_ssus:
- _id: Bio
acknowledgement: Natalia Baranova is supported by an EMBO Long-Term Fellowship (EMBO
ALTF 1163-2015) and Martin Loose by an ERC Starting Grant (ERCStG-2015-SelfOrganiCell).
alternative_title:
- Methods in Cell Biology
article_processing_charge: No
author:
- first_name: Natalia
full_name: Baranova, Natalia
id: 38661662-F248-11E8-B48F-1D18A9856A87
last_name: Baranova
orcid: 0000-0002-3086-9124
- first_name: Martin
full_name: Loose, Martin
id: 462D4284-F248-11E8-B48F-1D18A9856A87
last_name: Loose
orcid: 0000-0001-7309-9724
citation:
ama: 'Baranova NS, Loose M. Single-molecule measurements to study polymerization
dynamics of FtsZ-FtsA copolymers. In: Echard A, ed. Cytokinesis. Vol 137.
Academic Press; 2017:355-370. doi:10.1016/bs.mcb.2016.03.036'
apa: Baranova, N. S., & Loose, M. (2017). Single-molecule measurements to study
polymerization dynamics of FtsZ-FtsA copolymers. In A. Echard (Ed.), Cytokinesis
(Vol. 137, pp. 355–370). Academic Press. https://doi.org/10.1016/bs.mcb.2016.03.036
chicago: Baranova, Natalia S., and Martin Loose. “Single-Molecule Measurements to
Study Polymerization Dynamics of FtsZ-FtsA Copolymers.” In Cytokinesis,
edited by Arnaud Echard, 137:355–70. Academic Press, 2017. https://doi.org/10.1016/bs.mcb.2016.03.036.
ieee: N. S. Baranova and M. Loose, “Single-molecule measurements to study polymerization
dynamics of FtsZ-FtsA copolymers,” in Cytokinesis, vol. 137, A. Echard,
Ed. Academic Press, 2017, pp. 355–370.
ista: 'Baranova NS, Loose M. 2017.Single-molecule measurements to study polymerization
dynamics of FtsZ-FtsA copolymers. In: Cytokinesis. Methods in Cell Biology, vol.
137, 355–370.'
mla: Baranova, Natalia S., and Martin Loose. “Single-Molecule Measurements to Study
Polymerization Dynamics of FtsZ-FtsA Copolymers.” Cytokinesis, edited by
Arnaud Echard, vol. 137, Academic Press, 2017, pp. 355–70, doi:10.1016/bs.mcb.2016.03.036.
short: N.S. Baranova, M. Loose, in:, A. Echard (Ed.), Cytokinesis, Academic Press,
2017, pp. 355–370.
date_created: 2018-12-11T11:50:45Z
date_published: 2017-12-01T00:00:00Z
date_updated: 2023-09-20T11:16:30Z
day: '01'
department:
- _id: MaLo
doi: 10.1016/bs.mcb.2016.03.036
ec_funded: 1
editor:
- first_name: 'Arnaud '
full_name: 'Echard, Arnaud '
last_name: Echard
external_id:
isi:
- '000403542900022'
intvolume: ' 137'
isi: 1
language:
- iso: eng
month: '12'
oa_version: None
page: 355 - 370
project:
- _id: 2596EAB6-B435-11E9-9278-68D0E5697425
grant_number: ALTF 2015-1163
name: Synthesis of bacterial cell wall
- _id: 25681D80-B435-11E9-9278-68D0E5697425
call_identifier: FP7
grant_number: '291734'
name: International IST Postdoc Fellowship Programme
publication: Cytokinesis
publication_identifier:
issn:
- 0091679X
publication_status: published
publisher: Academic Press
publist_id: '6134'
quality_controlled: '1'
scopus_import: '1'
status: public
title: Single-molecule measurements to study polymerization dynamics of FtsZ-FtsA
copolymers
type: book_chapter
user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1
volume: 137
year: '2017'
...
---
_id: '256'
abstract:
- lang: eng
text: We show that a non-singular integral form of degree d is soluble over the
integers if and only if it is soluble over ℝ and over ℚp for all primes p, provided
that the form has at least (d - 1/2 √d)2d variables. This improves on a longstanding
result of Birch.
acknowledgement: While working on this paper the authors were supported by the Leverhulme
Trust and ERC grant 306457.
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Timothy D
full_name: Browning, Timothy D
id: 35827D50-F248-11E8-B48F-1D18A9856A87
last_name: Browning
orcid: 0000-0002-8314-0177
- first_name: Sean
full_name: Prendiville, Sean
last_name: Prendiville
citation:
ama: Browning TD, Prendiville S. Improvements in Birch’s theorem on forms in many
variables. Journal fur die Reine und Angewandte Mathematik. 2017;2017(731):122.
doi:10.1515/crelle-2014-0122
apa: Browning, T. D., & Prendiville, S. (2017). Improvements in Birch’s theorem
on forms in many variables. Journal Fur Die Reine Und Angewandte Mathematik.
Walter de Gruyter. https://doi.org/10.1515/crelle-2014-0122
chicago: Browning, Timothy D, and Sean Prendiville. “Improvements in Birch’s Theorem
on Forms in Many Variables.” Journal Fur Die Reine Und Angewandte Mathematik.
Walter de Gruyter, 2017. https://doi.org/10.1515/crelle-2014-0122.
ieee: T. D. Browning and S. Prendiville, “Improvements in Birch’s theorem on forms
in many variables,” Journal fur die Reine und Angewandte Mathematik, vol.
2017, no. 731. Walter de Gruyter, p. 122, 2017.
ista: Browning TD, Prendiville S. 2017. Improvements in Birch’s theorem on forms
in many variables. Journal fur die Reine und Angewandte Mathematik. 2017(731),
122.
mla: Browning, Timothy D., and Sean Prendiville. “Improvements in Birch’s Theorem
on Forms in Many Variables.” Journal Fur Die Reine Und Angewandte Mathematik,
vol. 2017, no. 731, Walter de Gruyter, 2017, p. 122, doi:10.1515/crelle-2014-0122.
short: T.D. Browning, S. Prendiville, Journal Fur Die Reine Und Angewandte Mathematik
2017 (2017) 122.
date_created: 2018-12-11T11:45:28Z
date_published: 2017-10-01T00:00:00Z
date_updated: 2024-03-05T12:09:21Z
day: '01'
doi: 10.1515/crelle-2014-0122
extern: '1'
external_id:
arxiv:
- '1402.4489'
intvolume: ' 2017'
issue: '731'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/abs/1402.4489
month: '10'
oa: 1
oa_version: Preprint
page: '122'
publication: Journal fur die Reine und Angewandte Mathematik
publication_identifier:
issn:
- 0075-4102
publication_status: published
publisher: Walter de Gruyter
publist_id: '7646'
quality_controlled: '1'
related_material:
record:
- id: '271'
relation: earlier_version
status: public
status: public
title: Improvements in Birch's theorem on forms in many variables
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 2017
year: '2017'
...
---
_id: '265'
abstract:
- lang: eng
text: We establish the dimension and irreducibility of the moduli space of rational
curves (of fixed degree) on arbitrary smooth hypersurfaces of sufficiently low
degree. A spreading out argument reduces the problem to hypersurfaces defined
over finite fields of large cardinality, which can then be tackled using a function
field version of the Hardy-Littlewood circle method, in which particular care
is taken to ensure uniformity in the size of the underlying finite field.
acknowledgement: While working on this paper the first author was supported by ERC
grant 306457.
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Timothy D
full_name: Browning, Timothy D
id: 35827D50-F248-11E8-B48F-1D18A9856A87
last_name: Browning
orcid: 0000-0002-8314-0177
- first_name: Pankaj
full_name: Vishe, Pankaj
last_name: Vishe
citation:
ama: Browning TD, Vishe P. Rational curves on smooth hypersurfaces of low degree.
Geometric Methods in Algebra and Number Theory. 2017;11(7):1657-1675. doi:10.2140/ant.2017.11.1657
apa: Browning, T. D., & Vishe, P. (2017). Rational curves on smooth hypersurfaces
of low degree. Geometric Methods in Algebra and Number Theory. Mathematical
Sciences Publishers. https://doi.org/10.2140/ant.2017.11.1657
chicago: Browning, Timothy D, and Pankaj Vishe. “Rational Curves on Smooth Hypersurfaces
of Low Degree.” Geometric Methods in Algebra and Number Theory. Mathematical
Sciences Publishers, 2017. https://doi.org/10.2140/ant.2017.11.1657.
ieee: T. D. Browning and P. Vishe, “Rational curves on smooth hypersurfaces of low
degree,” Geometric Methods in Algebra and Number Theory, vol. 11, no. 7. Mathematical
Sciences Publishers, pp. 1657–1675, 2017.
ista: Browning TD, Vishe P. 2017. Rational curves on smooth hypersurfaces of low
degree. Geometric Methods in Algebra and Number Theory. 11(7), 1657–1675.
mla: Browning, Timothy D., and Pankaj Vishe. “Rational Curves on Smooth Hypersurfaces
of Low Degree.” Geometric Methods in Algebra and Number Theory, vol. 11,
no. 7, Mathematical Sciences Publishers, 2017, pp. 1657–75, doi:10.2140/ant.2017.11.1657.
short: T.D. Browning, P. Vishe, Geometric Methods in Algebra and Number Theory 11
(2017) 1657–1675.
date_created: 2018-12-11T11:45:30Z
date_published: 2017-09-07T00:00:00Z
date_updated: 2024-03-05T11:43:38Z
day: '07'
doi: 10.2140/ant.2017.11.1657
extern: '1'
external_id:
arxiv:
- '1611.00553'
intvolume: ' 11'
issue: '7'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/abs/1611.00553
month: '09'
oa: 1
oa_version: Preprint
page: 1657 - 1675
publication: Geometric Methods in Algebra and Number Theory
publication_identifier:
eissn:
- 1944-7833
publication_status: published
publisher: ' Mathematical Sciences Publishers'
publist_id: '7637'
quality_controlled: '1'
status: public
title: Rational curves on smooth hypersurfaces of low degree
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 11
year: '2017'
...
---
_id: '266'
abstract:
- lang: eng
text: We generalise Birch's seminal work on forms in many variables to handle a
system of forms in which the degrees need not all be the same. This allows us
to prove the Hasse principle, weak approximation, and the Manin-Peyre conjecture
for a smooth and geometrically integral variety X Pm, provided only that its dimension
is large enough in terms of its degree.
acknowledgement: While working on this paper the first author was supported by ERC
grant 306457.
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Timothy D
full_name: Browning, Timothy D
id: 35827D50-F248-11E8-B48F-1D18A9856A87
last_name: Browning
orcid: 0000-0002-8314-0177
- first_name: Roger
full_name: Heath Brown, Roger
last_name: Heath Brown
citation:
ama: Browning TD, Heath Brown R. Forms in many variables and differing degrees.
Journal of the European Mathematical Society. 2017;19(2):357-394. doi:10.4171/JEMS/668
apa: Browning, T. D., & Heath Brown, R. (2017). Forms in many variables and
differing degrees. Journal of the European Mathematical Society. European
Mathematical Society Publishing House. https://doi.org/10.4171/JEMS/668
chicago: Browning, Timothy D, and Roger Heath Brown. “Forms in Many Variables and
Differing Degrees.” Journal of the European Mathematical Society. European
Mathematical Society Publishing House, 2017. https://doi.org/10.4171/JEMS/668.
ieee: T. D. Browning and R. Heath Brown, “Forms in many variables and differing
degrees,” Journal of the European Mathematical Society, vol. 19, no. 2.
European Mathematical Society Publishing House, pp. 357–394, 2017.
ista: Browning TD, Heath Brown R. 2017. Forms in many variables and differing degrees.
Journal of the European Mathematical Society. 19(2), 357–394.
mla: Browning, Timothy D., and Roger Heath Brown. “Forms in Many Variables and Differing
Degrees.” Journal of the European Mathematical Society, vol. 19, no. 2,
European Mathematical Society Publishing House, 2017, pp. 357–94, doi:10.4171/JEMS/668.
short: T.D. Browning, R. Heath Brown, Journal of the European Mathematical Society
19 (2017) 357–394.
date_created: 2018-12-11T11:45:31Z
date_published: 2017-01-26T00:00:00Z
date_updated: 2024-03-05T11:47:15Z
day: '26'
doi: 10.4171/JEMS/668
extern: '1'
external_id:
arxiv:
- '1403.5937'
intvolume: ' 19'
issue: '2'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/abs/1403.5937
month: '01'
oa: 1
oa_version: Preprint
page: 357 - 394
publication: Journal of the European Mathematical Society
publication_status: published
publisher: European Mathematical Society Publishing House
publist_id: '7636'
quality_controlled: '1'
status: public
title: Forms in many variables and differing degrees
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 19
year: '2017'
...
---
_id: '267'
abstract:
- lang: eng
text: Building on recent work of Bhargava, Elkies and Schnidman and of Kriz and
Li, we produce infinitely many smooth cubic surfaces defined over the field of
rational numbers that contain rational points.
acknowledgement: While working on this paper the author was supported by ERC grant
306457.
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Timothy D
full_name: Browning, Timothy D
id: 35827D50-F248-11E8-B48F-1D18A9856A87
last_name: Browning
orcid: 0000-0002-8314-0177
citation:
ama: Browning TD. Many cubic surfaces contain rational points. Mathematika.
2017;63(3):818-839. doi:10.1112/S0025579317000195
apa: Browning, T. D. (2017). Many cubic surfaces contain rational points. Mathematika.
Cambridge University Press. https://doi.org/10.1112/S0025579317000195
chicago: Browning, Timothy D. “Many Cubic Surfaces Contain Rational Points.” Mathematika.
Cambridge University Press, 2017. https://doi.org/10.1112/S0025579317000195.
ieee: T. D. Browning, “Many cubic surfaces contain rational points,” Mathematika,
vol. 63, no. 3. Cambridge University Press, pp. 818–839, 2017.
ista: Browning TD. 2017. Many cubic surfaces contain rational points. Mathematika.
63(3), 818–839.
mla: Browning, Timothy D. “Many Cubic Surfaces Contain Rational Points.” Mathematika,
vol. 63, no. 3, Cambridge University Press, 2017, pp. 818–39, doi:10.1112/S0025579317000195.
short: T.D. Browning, Mathematika 63 (2017) 818–839.
date_created: 2018-12-11T11:45:31Z
date_published: 2017-11-29T00:00:00Z
date_updated: 2024-03-05T11:49:27Z
day: '29'
doi: 10.1112/S0025579317000195
extern: '1'
external_id:
arxiv:
- '1701.00525'
intvolume: ' 63'
issue: '3'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/abs/1701.00525
month: '11'
oa: 1
oa_version: Preprint
page: 818 - 839
publication: Mathematika
publication_identifier:
issn:
- 0025-5793
publication_status: published
publisher: Cambridge University Press
publist_id: '7635'
quality_controlled: '1'
status: public
title: Many cubic surfaces contain rational points
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 63
year: '2017'
...
---
_id: '268'
abstract:
- lang: eng
text: We show that any subset of the squares of positive relative upper density
contains nontrivial solutions to a translation-invariant linear equation in five
or more variables, with explicit quantitative bounds. As a consequence, we establish
the partition regularity of any diagonal quadric in five or more variables whose
coefficients sum to zero. Unlike previous approaches, which are limited to equations
in seven or more variables, we employ transference technology of Green to import
bounds from the linear setting.
acknowledgement: Whilst working on this paper the authors were supported by ERC grant
306457.
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Timothy D
full_name: Browning, Timothy D
id: 35827D50-F248-11E8-B48F-1D18A9856A87
last_name: Browning
orcid: 0000-0002-8314-0177
- first_name: Sean
full_name: Prendiville, Sean
last_name: Prendiville
citation:
ama: Browning TD, Prendiville S. A transference approach to a Roth-type theorem
in the squares. International Mathematics Research Notices. 2017;2017(7):2219-2248.
doi:10.1093/imrn/rnw096
apa: Browning, T. D., & Prendiville, S. (2017). A transference approach to a
Roth-type theorem in the squares. International Mathematics Research Notices.
Oxford University Press. https://doi.org/10.1093/imrn/rnw096
chicago: Browning, Timothy D, and Sean Prendiville. “A Transference Approach to
a Roth-Type Theorem in the Squares.” International Mathematics Research Notices.
Oxford University Press, 2017. https://doi.org/10.1093/imrn/rnw096.
ieee: T. D. Browning and S. Prendiville, “A transference approach to a Roth-type
theorem in the squares,” International Mathematics Research Notices, vol.
2017, no. 7. Oxford University Press, pp. 2219–2248, 2017.
ista: Browning TD, Prendiville S. 2017. A transference approach to a Roth-type theorem
in the squares. International Mathematics Research Notices. 2017(7), 2219–2248.
mla: Browning, Timothy D., and Sean Prendiville. “A Transference Approach to a Roth-Type
Theorem in the Squares.” International Mathematics Research Notices, vol.
2017, no. 7, Oxford University Press, 2017, pp. 2219–48, doi:10.1093/imrn/rnw096.
short: T.D. Browning, S. Prendiville, International Mathematics Research Notices
2017 (2017) 2219–2248.
date_created: 2018-12-11T11:45:31Z
date_published: 2017-04-01T00:00:00Z
date_updated: 2024-03-05T11:52:36Z
day: '01'
doi: 10.1093/imrn/rnw096
extern: '1'
external_id:
arxiv:
- '1510.00136'
intvolume: ' 2017'
issue: '7'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/abs/1510.00136
month: '04'
oa: 1
oa_version: Preprint
page: 2219 - 2248
publication: International Mathematics Research Notices
publication_identifier:
issn:
- 1073-7928
publication_status: published
publisher: Oxford University Press
publist_id: '7634'
quality_controlled: '1'
status: public
title: A transference approach to a Roth-type theorem in the squares
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 2017
year: '2017'
...
---
_id: '269'
abstract:
- lang: eng
text: We investigate Fano varieties defined over a number field that contain subvarieties
whose number of rational points of bounded height is comparable to the total number
on the variety.
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Timothy D
full_name: Browning, Timothy D
id: 35827D50-F248-11E8-B48F-1D18A9856A87
last_name: Browning
orcid: 0000-0002-8314-0177
- first_name: Daniel
full_name: Loughran, Daniel
last_name: Loughran
citation:
ama: Browning TD, Loughran D. Varieties with too many rational points. Mathematische
Zeitschrift. 2017;285(3-4):1249-1267. doi:10.1007/s00209-016-1746-2
apa: Browning, T. D., & Loughran, D. (2017). Varieties with too many rational
points. Mathematische Zeitschrift. Springer. https://doi.org/10.1007/s00209-016-1746-2
chicago: Browning, Timothy D, and Daniel Loughran. “Varieties with Too Many Rational
Points.” Mathematische Zeitschrift. Springer, 2017. https://doi.org/10.1007/s00209-016-1746-2.
ieee: T. D. Browning and D. Loughran, “Varieties with too many rational points,”
Mathematische Zeitschrift, vol. 285, no. 3–4. Springer, pp. 1249–1267,
2017.
ista: Browning TD, Loughran D. 2017. Varieties with too many rational points. Mathematische
Zeitschrift. 285(3–4), 1249–1267.
mla: Browning, Timothy D., and Daniel Loughran. “Varieties with Too Many Rational
Points.” Mathematische Zeitschrift, vol. 285, no. 3–4, Springer, 2017,
pp. 1249–67, doi:10.1007/s00209-016-1746-2.
short: T.D. Browning, D. Loughran, Mathematische Zeitschrift 285 (2017) 1249–1267.
date_created: 2018-12-11T11:45:32Z
date_published: 2017-04-01T00:00:00Z
date_updated: 2024-03-05T11:56:29Z
day: '01'
doi: 10.1007/s00209-016-1746-2
extern: '1'
external_id:
arxiv:
- '1311.5755'
intvolume: ' 285'
issue: 3-4
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/abs/1311.5755
month: '04'
oa: 1
oa_version: Preprint
page: 1249 - 1267
publication: Mathematische Zeitschrift
publication_status: published
publisher: Springer
publist_id: '7633'
quality_controlled: '1'
status: public
title: Varieties with too many rational points
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 285
year: '2017'
...
---
_id: '270'
abstract:
- lang: eng
text: Given a symmetric variety Y defined over Q and a non-zero polynomial with
integer coefficients, we use techniques from homogeneous dynamics to establish
conditions under which the polynomial can be made r-free for a Zariski dense set
of integral points on Y . We also establish an asymptotic counting formula for
this set. In the special case that Y is a quadric hypersurface, we give explicit
bounds on the size of r by combining the argument with a uniform upper bound for
the density of integral points on general affine quadrics defined over Q.
acknowledgement: While working on this paper the authors were supported by ERC grants
306457 and 239606, respectively.
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Timothy D
full_name: Browning, Timothy D
id: 35827D50-F248-11E8-B48F-1D18A9856A87
last_name: Browning
orcid: 0000-0002-8314-0177
- first_name: Alexander
full_name: Gorodnik, Alexander
last_name: Gorodnik
citation:
ama: Browning TD, Gorodnik A. Power-free values of polynomials on symmetric varieties.
Proceedings of the London Mathematical Society. 2017;114(6):1044-1080.
doi:10.1112/plms.12030
apa: Browning, T. D., & Gorodnik, A. (2017). Power-free values of polynomials
on symmetric varieties. Proceedings of the London Mathematical Society.
Wiley. https://doi.org/10.1112/plms.12030
chicago: Browning, Timothy D, and Alexander Gorodnik. “Power-Free Values of Polynomials
on Symmetric Varieties.” Proceedings of the London Mathematical Society.
Wiley, 2017. https://doi.org/10.1112/plms.12030.
ieee: T. D. Browning and A. Gorodnik, “Power-free values of polynomials on symmetric
varieties,” Proceedings of the London Mathematical Society, vol. 114, no.
6. Wiley, pp. 1044–1080, 2017.
ista: Browning TD, Gorodnik A. 2017. Power-free values of polynomials on symmetric
varieties. Proceedings of the London Mathematical Society. 114(6), 1044–1080.
mla: Browning, Timothy D., and Alexander Gorodnik. “Power-Free Values of Polynomials
on Symmetric Varieties.” Proceedings of the London Mathematical Society,
vol. 114, no. 6, Wiley, 2017, pp. 1044–80, doi:10.1112/plms.12030.
short: T.D. Browning, A. Gorodnik, Proceedings of the London Mathematical Society
114 (2017) 1044–1080.
date_created: 2018-12-11T11:45:32Z
date_published: 2017-06-01T00:00:00Z
date_updated: 2024-03-05T11:58:25Z
day: '01'
doi: 10.1112/plms.12030
extern: '1'
external_id:
arxiv:
- '1606.06342'
intvolume: ' 114'
issue: '6'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/abs/1606.06342
month: '06'
oa: 1
oa_version: Preprint
page: 1044 - 1080
publication: Proceedings of the London Mathematical Society
publication_identifier:
issn:
- 0024-6115
publication_status: published
publisher: Wiley
publist_id: '7632'
quality_controlled: '1'
status: public
title: Power-free values of polynomials on symmetric varieties
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 114
year: '2017'
...
---
_id: '272'
abstract:
- lang: eng
text: Given a number field K/Q and a polynomial P ε Q [t], all of whose roots are
Q, let X be the variety defined by the equation NK (x) = P (t). Combining additive
combinatiorics with descent we show that the Brauer-Manin obstruction is the only
obstruction to the Hesse principle and weak approximation on any smooth and projective
model of X.
acknowledgement: While working on this paper the first author was supported by ERC
grant 306457 and the second author was supported by EPSRC grant EP/E053262/1 and
by ERC grant 208091. Some of this work was carried out during the programme “Arithmetic
and geometry” in 2013 at the Hausdorff Institute in Bonn.
article_processing_charge: No
article_type: original
author:
- first_name: Timothy D
full_name: Browning, Timothy D
id: 35827D50-F248-11E8-B48F-1D18A9856A87
last_name: Browning
orcid: 0000-0002-8314-0177
- first_name: Lilian
full_name: Matthiesen, Lilian
last_name: Matthiesen
citation:
ama: Browning TD, Matthiesen L. Norm forms for arbitrary number fields as products
of linear polynomials. Annales Scientifiques de l’Ecole Normale Superieure.
2017;50(6):1383-1446. doi:10.24033/asens.2348
apa: Browning, T. D., & Matthiesen, L. (2017). Norm forms for arbitrary number
fields as products of linear polynomials. Annales Scientifiques de l’Ecole
Normale Superieure. Societe Mathematique de France. https://doi.org/10.24033/asens.2348
chicago: Browning, Timothy D, and Lilian Matthiesen. “Norm Forms for Arbitrary Number
Fields as Products of Linear Polynomials.” Annales Scientifiques de l’Ecole
Normale Superieure. Societe Mathematique de France, 2017. https://doi.org/10.24033/asens.2348.
ieee: T. D. Browning and L. Matthiesen, “Norm forms for arbitrary number fields
as products of linear polynomials,” Annales Scientifiques de l’Ecole Normale
Superieure, vol. 50, no. 6. Societe Mathematique de France, pp. 1383–1446,
2017.
ista: Browning TD, Matthiesen L. 2017. Norm forms for arbitrary number fields as
products of linear polynomials. Annales Scientifiques de l’Ecole Normale Superieure.
50(6), 1383–1446.
mla: Browning, Timothy D., and Lilian Matthiesen. “Norm Forms for Arbitrary Number
Fields as Products of Linear Polynomials.” Annales Scientifiques de l’Ecole
Normale Superieure, vol. 50, no. 6, Societe Mathematique de France, 2017,
pp. 1383–446, doi:10.24033/asens.2348.
short: T.D. Browning, L. Matthiesen, Annales Scientifiques de l’Ecole Normale Superieure
50 (2017) 1383–1446.
date_created: 2018-12-11T11:45:32Z
date_published: 2017-12-01T00:00:00Z
date_updated: 2024-03-05T12:13:35Z
day: '01'
doi: 10.24033/asens.2348
extern: '1'
intvolume: ' 50'
issue: '6'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://research-information.bristol.ac.uk/en/publications/norm-forms-for-arbitrary-number-fields-as-products-of-linear-polynomials(f79a584b-ec58-47c8-aa97-8c5505e3f751).html
month: '12'
oa: 1
oa_version: Submitted Version
page: 1383 - 1446
publication: Annales Scientifiques de l'Ecole Normale Superieure
publication_status: published
publisher: Societe Mathematique de France
publist_id: '7630'
quality_controlled: '1'
status: public
title: Norm forms for arbitrary number fields as products of linear polynomials
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 50
year: '2017'
...
---
_id: '274'
abstract:
- lang: eng
text: We consider the problem of estimating the partition function Z(β)=∑xexp(−β(H(x))
of a Gibbs distribution with a Hamilton H(⋅), or more precisely the logarithm
of the ratio q=lnZ(0)/Z(β). It has been recently shown how to approximate q with
high probability assuming the existence of an oracle that produces samples from
the Gibbs distribution for a given parameter value in [0,β]. The current best
known approach due to Huber [9] uses O(qlnn⋅[lnq+lnlnn+ε−2]) oracle calls on average
where ε is the desired accuracy of approximation and H(⋅) is assumed to lie in
{0}∪[1,n]. We improve the complexity to O(qlnn⋅ε−2) oracle calls. We also show
that the same complexity can be achieved if exact oracles are replaced with approximate
sampling oracles that are within O(ε2qlnn) variation distance from exact oracles.
Finally, we prove a lower bound of Ω(q⋅ε−2) oracle calls under a natural model
of computation.
article_processing_charge: No
arxiv: 1
author:
- first_name: Vladimir
full_name: Kolmogorov, Vladimir
id: 3D50B0BA-F248-11E8-B48F-1D18A9856A87
last_name: Kolmogorov
citation:
ama: 'Kolmogorov V. A faster approximation algorithm for the Gibbs partition function.
In: Proceedings of the 31st Conference On Learning Theory. Vol 75. ML Research
Press; 2017:228-249.'
apa: Kolmogorov, V. (2017). A faster approximation algorithm for the Gibbs partition
function. In Proceedings of the 31st Conference On Learning Theory (Vol.
75, pp. 228–249). ML Research Press.
chicago: Kolmogorov, Vladimir. “A Faster Approximation Algorithm for the Gibbs Partition
Function.” In Proceedings of the 31st Conference On Learning Theory, 75:228–49.
ML Research Press, 2017.
ieee: V. Kolmogorov, “A faster approximation algorithm for the Gibbs partition function,”
in Proceedings of the 31st Conference On Learning Theory, 2017, vol. 75,
pp. 228–249.
ista: 'Kolmogorov V. 2017. A faster approximation algorithm for the Gibbs partition
function. Proceedings of the 31st Conference On Learning Theory. COLT: Annual
Conference on Learning Theory vol. 75, 228–249.'
mla: Kolmogorov, Vladimir. “A Faster Approximation Algorithm for the Gibbs Partition
Function.” Proceedings of the 31st Conference On Learning Theory, vol.
75, ML Research Press, 2017, pp. 228–49.
short: V. Kolmogorov, in:, Proceedings of the 31st Conference On Learning Theory,
ML Research Press, 2017, pp. 228–249.
conference:
end_date: 2018-07-09
name: 'COLT: Annual Conference on Learning Theory '
start_date: 2018-07-06
date_created: 2018-12-11T11:45:33Z
date_published: 2017-12-27T00:00:00Z
date_updated: 2023-10-17T12:32:13Z
day: '27'
ddc:
- '510'
department:
- _id: VlKo
ec_funded: 1
external_id:
arxiv:
- '1608.04223'
file:
- access_level: open_access
checksum: 89db06a0e8083524449cb59b56bf4e5b
content_type: application/pdf
creator: dernst
date_created: 2020-05-12T09:23:27Z
date_updated: 2020-07-14T12:45:45Z
file_id: '7820'
file_name: 2018_PMLR_Kolmogorov.pdf
file_size: 408974
relation: main_file
file_date_updated: 2020-07-14T12:45:45Z
has_accepted_license: '1'
intvolume: ' 75'
language:
- iso: eng
month: '12'
oa: 1
oa_version: Published Version
page: 228-249
project:
- _id: 25FBA906-B435-11E9-9278-68D0E5697425
call_identifier: FP7
grant_number: '616160'
name: 'Discrete Optimization in Computer Vision: Theory and Practice'
publication: Proceedings of the 31st Conference On Learning Theory
publication_status: published
publisher: ML Research Press
publist_id: '7628'
quality_controlled: '1'
status: public
title: A faster approximation algorithm for the Gibbs partition function
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: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 75
year: '2017'
...
---
_id: '313'
abstract:
- lang: eng
text: 'Tunneling of a particle through a potential barrier remains one of the most
remarkable quantum phenomena. Owing to advances in laser technology, electric
fields comparable to those electrons experience in atoms are readily generated
and open opportunities to dynamically investigate the process of electron tunneling
through the potential barrier formed by the superposition of both laser and atomic
fields. Attosecond-time and angstrom-space resolution of the strong laser-field
technique allow to address fundamental questions related to tunneling, which are
still open and debated: Which time is spent under the barrier and what momentum
is picked up by the particle in the meantime? In this combined experimental and
theoretical study we demonstrate that for strong-field ionization the leading
quantum mechanical Wigner treatment for the time resolved description of tunneling
is valid. We achieve a high sensitivity on the tunneling barrier and unambiguously
isolate its effects by performing a differential study of two systems with almost
identical tunneling geometry. Moreover, working with a low frequency laser, we
essentially limit the non-adiabaticity of the process as a major source of uncertainty.
The agreement between experiment and theory implies two substantial corrections
with respect to the widely employed quasiclassical treatment: In addition to a
non-vanishing longitudinal momentum along the laser field-direction we provide
clear evidence for a non-zero tunneling time delay. This addresses also the fundamental
question how the transition occurs from the tunnel barrier to free space classical
evolution of the ejected electron.'
alternative_title:
- 'Journal of Physics: Conference Series'
article_number: '012004'
arxiv: 1
author:
- first_name: Nicolas
full_name: Camus, Nicolas
last_name: Camus
- first_name: Enderalp
full_name: Yakaboylu, Enderalp
id: 38CB71F6-F248-11E8-B48F-1D18A9856A87
last_name: Yakaboylu
orcid: 0000-0001-5973-0874
- first_name: Lutz
full_name: Fechner, Lutz
last_name: Fechner
- first_name: Michael
full_name: Klaiber, Michael
last_name: Klaiber
- first_name: Martin
full_name: Laux, Martin
last_name: Laux
- first_name: Yonghao
full_name: Mi, Yonghao
last_name: Mi
- first_name: Karen
full_name: Hatsagortsyan, Karen
last_name: Hatsagortsyan
- first_name: Thomas
full_name: Pfeifer, Thomas
last_name: Pfeifer
- first_name: Cristoph
full_name: Keitel, Cristoph
last_name: Keitel
- first_name: Robert
full_name: Moshammer, Robert
last_name: Moshammer
citation:
ama: 'Camus N, Yakaboylu E, Fechner L, et al. Experimental evidence for Wigner’s
tunneling time. In: Vol 999. American Physical Society; 2017. doi:10.1088/1742-6596/999/1/012004'
apa: 'Camus, N., Yakaboylu, E., Fechner, L., Klaiber, M., Laux, M., Mi, Y., … Moshammer,
R. (2017). Experimental evidence for Wigner’s tunneling time (Vol. 999). Presented
at the Annual International Laser Physics Workshop LPHYS, Kazan, Russian Federation:
American Physical Society. https://doi.org/10.1088/1742-6596/999/1/012004'
chicago: Camus, Nicolas, Enderalp Yakaboylu, Lutz Fechner, Michael Klaiber, Martin
Laux, Yonghao Mi, Karen Hatsagortsyan, Thomas Pfeifer, Cristoph Keitel, and Robert
Moshammer. “Experimental Evidence for Wigner’s Tunneling Time,” Vol. 999. American
Physical Society, 2017. https://doi.org/10.1088/1742-6596/999/1/012004.
ieee: N. Camus et al., “Experimental evidence for Wigner’s tunneling time,”
presented at the Annual International Laser Physics Workshop LPHYS, Kazan, Russian
Federation, 2017, vol. 999, no. 1.
ista: 'Camus N, Yakaboylu E, Fechner L, Klaiber M, Laux M, Mi Y, Hatsagortsyan K,
Pfeifer T, Keitel C, Moshammer R. 2017. Experimental evidence for Wigner’s tunneling
time. Annual International Laser Physics Workshop LPHYS, Journal of Physics: Conference
Series, vol. 999, 012004.'
mla: Camus, Nicolas, et al. Experimental Evidence for Wigner’s Tunneling Time.
Vol. 999, no. 1, 012004, American Physical Society, 2017, doi:10.1088/1742-6596/999/1/012004.
short: N. Camus, E. Yakaboylu, L. Fechner, M. Klaiber, M. Laux, Y. Mi, K. Hatsagortsyan,
T. Pfeifer, C. Keitel, R. Moshammer, in:, American Physical Society, 2017.
conference:
end_date: 2017-08-21
location: Kazan, Russian Federation
name: Annual International Laser Physics Workshop LPHYS
start_date: 2017-08-17
date_created: 2018-12-11T11:45:46Z
date_published: 2017-07-14T00:00:00Z
date_updated: 2023-02-23T12:36:07Z
day: '14'
ddc:
- '530'
department:
- _id: MiLe
doi: 10.1088/1742-6596/999/1/012004
external_id:
arxiv:
- '1611.03701'
file:
- access_level: open_access
checksum: 6e70b525a84f6d5fb175c48e9f5cb59a
content_type: application/pdf
creator: dernst
date_created: 2019-01-22T08:34:10Z
date_updated: 2020-07-14T12:46:00Z
file_id: '5871'
file_name: 2017_Physics_Camus.pdf
file_size: 949321
relation: main_file
file_date_updated: 2020-07-14T12:46:00Z
has_accepted_license: '1'
intvolume: ' 999'
issue: '1'
language:
- iso: eng
month: '07'
oa: 1
oa_version: Published Version
publication_identifier:
issn:
- '17426588'
publication_status: published
publisher: American Physical Society
publist_id: '7552'
quality_controlled: '1'
related_material:
record:
- id: '6013'
relation: later_version
status: public
scopus_import: 1
status: public
title: Experimental evidence for Wigner's tunneling time
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: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 999
year: '2017'
...
---
_id: '373'
abstract:
- lang: eng
text: 'This review captures the synthesis, assembly, properties, and applications
of copper chalcogenide NCs, which have achieved significant research interest
in the last decade due to their compositional and structural versatility. The
outstanding functional properties of these materials stems from the relationship
between their band structure and defect concentration, including charge carrier
concentration and electronic conductivity character, which consequently affects
their optoelectronic, optical, and plasmonic properties. This, combined with several
metastable crystal phases and stoichiometries and the low energy of formation
of defects, makes the reproducible synthesis of these materials, with tunable
parameters, remarkable. Further to this, the review captures the progress of the
hierarchical assembly of these NCs, which bridges the link between their discrete
and collective properties. Their ubiquitous application set has cross-cut energy
conversion (photovoltaics, photocatalysis, thermoelectrics), energy storage (lithium-ion
batteries, hydrogen generation), emissive materials (plasmonics, LEDs, biolabelling),
sensors (electrochemical, biochemical), biomedical devices (magnetic resonance
imaging, X-ray computer tomography), and medical therapies (photochemothermal
therapies, immunotherapy, radiotherapy, and drug delivery). The confluence of
advances in the synthesis, assembly, and application of these NCs in the past
decade has the potential to significantly impact society, both economically and
environmentally. '
acknowledgement: C.C. and K.M.R. gratefully acknowledge support from Science Foundation
Ireland (SFI) under the Principal Investigator Program under Contract No. 11PI-1148.
This work was conducted under the framework of the Irish Government’s Programme
for Research in Third Level Institutions Cycle 5, National Development Plan 2007−2013
with the assistance of the European Regional Development Fund. A.S. gratefully acknowledges
Director’s Postdoctoral Fellowship support from the Los Alamos National Laboratory.
M.I., O.D., and A.C. gratefully acknowledge support from the European Regional Development
Funds and the Spanish MINECO Project BOOSTER (ENE2013-46624-C4-3-R). M.I. and O.D.
thank AGAUR for their Beatriu de Pinós postdoctoral grant (2013 BP-A00344) and Ph.D.
grant (2015 FI-B00810, 2016 FI-B100067), respectively.
article_processing_charge: No
article_type: review
author:
- first_name: Claudia
full_name: Coughlan, Claudia
last_name: Coughlan
- first_name: Maria
full_name: Ibanez Sabate, Maria
id: 43C61214-F248-11E8-B48F-1D18A9856A87
last_name: Ibanez Sabate
orcid: 0000-0001-5013-2843
- first_name: Oleksandr
full_name: Dobrozhan, Oleksandr
last_name: Dobrozhan
- first_name: Ajay
full_name: Singh, Ajay
last_name: Singh
- first_name: Andreu
full_name: Cabot, Andreu
last_name: Cabot
- first_name: Kevin
full_name: Ryan, Kevin
last_name: Ryan
citation:
ama: Coughlan C, Ibáñez M, Dobrozhan O, Singh A, Cabot A, Ryan K. Compound copper
chalcogenide nanocrystals. Chemical Reviews. 2017;117(9):5865-6109. doi:10.1021/acs.chemrev.6b00376
apa: Coughlan, C., Ibáñez, M., Dobrozhan, O., Singh, A., Cabot, A., & Ryan,
K. (2017). Compound copper chalcogenide nanocrystals. Chemical Reviews.
American Chemical Society. https://doi.org/10.1021/acs.chemrev.6b00376
chicago: Coughlan, Claudia, Maria Ibáñez, Oleksandr Dobrozhan, Ajay Singh, Andreu
Cabot, and Kevin Ryan. “Compound Copper Chalcogenide Nanocrystals.” Chemical
Reviews. American Chemical Society, 2017. https://doi.org/10.1021/acs.chemrev.6b00376.
ieee: C. Coughlan, M. Ibáñez, O. Dobrozhan, A. Singh, A. Cabot, and K. Ryan, “Compound
copper chalcogenide nanocrystals,” Chemical Reviews, vol. 117, no. 9. American
Chemical Society, pp. 5865–6109, 2017.
ista: Coughlan C, Ibáñez M, Dobrozhan O, Singh A, Cabot A, Ryan K. 2017. Compound
copper chalcogenide nanocrystals. Chemical Reviews. 117(9), 5865–6109.
mla: Coughlan, Claudia, et al. “Compound Copper Chalcogenide Nanocrystals.” Chemical
Reviews, vol. 117, no. 9, American Chemical Society, 2017, pp. 5865–6109,
doi:10.1021/acs.chemrev.6b00376.
short: C. Coughlan, M. Ibáñez, O. Dobrozhan, A. Singh, A. Cabot, K. Ryan, Chemical
Reviews 117 (2017) 5865–6109.
date_created: 2018-12-11T11:46:06Z
date_published: 2017-04-10T00:00:00Z
date_updated: 2024-03-05T12:17:59Z
day: '10'
doi: 10.1021/acs.chemrev.6b00376
extern: '1'
external_id:
pmid:
- '28394585'
intvolume: ' 117'
issue: '9'
language:
- iso: eng
month: '04'
oa_version: None
page: 5865 - 6109
pmid: 1
publication: Chemical Reviews
publication_identifier:
eissn:
- 1520-6890
issn:
- 0009-2665
publication_status: published
publisher: American Chemical Society
publist_id: '7456'
quality_controlled: '1'
status: public
title: Compound copper chalcogenide nanocrystals
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 117
year: '2017'
...
---
_id: '374'
abstract:
- lang: eng
text: The conversion of thermal energy to electricity and vice versa by means of
solid state thermoelectric devices is extremely appealing. However, its cost-effectiveness
is seriously hampered by the relatively high production cost and low efficiency
of current thermoelectric materials and devices. To overcome present challenges
and enable a successful deployment of thermoelectric systems in their wide application
range, materials with significantly improved performance need to be developed.
Nanostructuration can help in several ways to reach the very particular group
of properties required to achieve high thermoelectric performances. Nanodomains
inserted within a crystalline matrix can provide large charge carrier concentrations
without strongly influencing their mobility, thus allowing to reach very high
electrical conductivities. Nanostructured materials contain numerous grain boundaries
that efficiently scatter mid- and long-wavelength phonons thus reducing the thermal
conductivity. Furthermore, nanocrystalline domains can enhance the Seebeck coefficient
by modifying the density of states and/or providing type- and energy-dependent
charge carrier scattering. All these advantages can only be reached when engineering
a complex type of material, nanocomposites, with exquisite control over structural
and chemical parameters at multiple length scales. Since current conventional
nanomaterial production technologies lack such level of control, alternative strategies
need to be developed and adjusted to the specifics of the field. A particularly
suitable approach to produce nanocomposites with unique level of control over
their structural and compositional parameters is their bottom-up engineering from
solution-processed nanoparticles. In this work, we review the state-of-the-art
of this technology applied to the thermoelectric field, including the synthesis
of nanoparticles of suitable materials with precisely engineered composition and
surface chemistry, their combination and consolidation into nanostructured materials,
the strategies to electronically dope such materials and the attempts to fabricate
thermoelectric devices using nanoparticle-based nanopowders and inks.
acknowledgement: This work was supported by the European Regional Development Funds,
the Spanish Ministerio de Econom?a y Competitividad through the projects BOOSTER
(ENE2013-46624-C4-3-R) and SEHTOP (ENE2016-77798-C4-3-R). S. O. thanks AGAUR her
PhD grant. Y. L. and Y. Z. thank the China Scholarship Council for scholarship support.
M. I. acknowledges financial support by ETH Carrier Seed Grant (SEED-18 16-2) and
M. V. K. acknowledges partial financial support by the European Union (EU) via FP7
ERC Starting Grant 2012 (Project NANOSOLID, GA No. 306733).
article_processing_charge: No
article_type: original
author:
- first_name: Silvia
full_name: Ortega, Silvia
last_name: Ortega
- first_name: Maria
full_name: Ibanez Sabate, Maria
id: 43C61214-F248-11E8-B48F-1D18A9856A87
last_name: Ibanez Sabate
orcid: 0000-0001-5013-2843
- first_name: Yu
full_name: Liu, Yu
id: 2A70014E-F248-11E8-B48F-1D18A9856A87
last_name: Liu
orcid: 0000-0001-7313-6740
- first_name: Yu
full_name: Zhang, Yu
last_name: Zhang
- first_name: Maksym
full_name: Kovalenko, Maksym
last_name: Kovalenko
- first_name: Doris
full_name: Cadavid, Doris
last_name: Cadavid
- first_name: Andreu
full_name: Cabot, Andreu
last_name: Cabot
citation:
ama: Ortega S, Ibáñez M, Liu Y, et al. Bottom up engineering of thermoelectric nanomaterials
and devices from solution processed nanoparticle building blocks. Chemical
Society Reviews. 2017;46(12):3510-3528. doi:10.1039/c6cs00567e
apa: Ortega, S., Ibáñez, M., Liu, Y., Zhang, Y., Kovalenko, M., Cadavid, D., &
Cabot, A. (2017). Bottom up engineering of thermoelectric nanomaterials and devices
from solution processed nanoparticle building blocks. Chemical Society Reviews.
Royal Society of Chemistry. https://doi.org/10.1039/c6cs00567e
chicago: Ortega, Silvia, Maria Ibáñez, Yu Liu, Yu Zhang, Maksym Kovalenko, Doris
Cadavid, and Andreu Cabot. “Bottom up Engineering of Thermoelectric Nanomaterials
and Devices from Solution Processed Nanoparticle Building Blocks.” Chemical
Society Reviews. Royal Society of Chemistry, 2017. https://doi.org/10.1039/c6cs00567e.
ieee: S. Ortega et al., “Bottom up engineering of thermoelectric nanomaterials
and devices from solution processed nanoparticle building blocks,” Chemical
Society Reviews, vol. 46, no. 12. Royal Society of Chemistry, pp. 3510–3528,
2017.
ista: Ortega S, Ibáñez M, Liu Y, Zhang Y, Kovalenko M, Cadavid D, Cabot A. 2017.
Bottom up engineering of thermoelectric nanomaterials and devices from solution
processed nanoparticle building blocks. Chemical Society Reviews. 46(12), 3510–3528.
mla: Ortega, Silvia, et al. “Bottom up Engineering of Thermoelectric Nanomaterials
and Devices from Solution Processed Nanoparticle Building Blocks.” Chemical
Society Reviews, vol. 46, no. 12, Royal Society of Chemistry, 2017, pp. 3510–28,
doi:10.1039/c6cs00567e.
short: S. Ortega, M. Ibáñez, Y. Liu, Y. Zhang, M. Kovalenko, D. Cadavid, A. Cabot,
Chemical Society Reviews 46 (2017) 3510–3528.
date_created: 2018-12-11T11:46:06Z
date_published: 2017-06-21T00:00:00Z
date_updated: 2024-03-05T12:21:43Z
day: '21'
doi: 10.1039/c6cs00567e
extern: '1'
external_id:
pmid:
- '28470243'
intvolume: ' 46'
issue: '12'
language:
- iso: eng
month: '06'
oa_version: None
page: 3510 - 3528
pmid: 1
publication: Chemical Society Reviews
publication_identifier:
eissn:
- 1460-4744
issn:
- 0306-0012
publication_status: published
publisher: Royal Society of Chemistry
publist_id: '7454'
quality_controlled: '1'
status: public
title: Bottom up engineering of thermoelectric nanomaterials and devices from solution
processed nanoparticle building blocks
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 46
year: '2017'
...
---
_id: '375'
abstract:
- lang: eng
text: "Branched nanocrystals (NCs) enable high atomic surface exposure within a
crystalline network that provides avenues for charge transport. This combination
of properties makes branched NCs particularly suitable for a range of applications
where both interaction with the media and charge transport are involved. Herein
we report on the colloidal synthesis of branched ceria NCs by means of a ligand-mediated
overgrowth mechanism. In particular, the differential coverage of oleic acid as
an X-type ligand at ceria facets with different atomic density, atomic coordination
deficiency, and oxygen vacancy density resulted in a preferential growth in the
[111] direction and thus in the formation of ceria octapods. Alcohols, through
an esterification alcoholysis reaction, promoted faster growth rates that translated
into nanostructures with higher geometrical complexity, increasing the branch
aspect ratio and triggering the formation of side branches. On the other hand,
the presence of water resulted in a significant reduction of the growth rate,
decreasing the reaction yield and eliminating side branching, which we associate
to a blocking of the surface reaction sites or a displacement of the alcoholysis
reaction. Overall, adjusting the amounts of each chemical, well-defined branched
ceria NCs with tuned number, thickness, and length of branches and with overall
size ranging from 5 to 45 nm could be produced. We further demonstrate that such
branched ceria NCs are able to provide higher surface areas and related oxygen
storage capacities (OSC) than quasi-spherical NCs.\r\n\r\n"
acknowledgement: This work was supported by the European Regional Development Funds
and the Spanish MINECO project BOOSTER. T.B. is grateful for the FI-AGAUR Research
Fellowship Program, Generalitat de Catalunya (2015 FI_B 00744). P.G. acknowledges
the People Programme (Marie Curie Actions) of the FP7/2007-2013 European Union Program
(TECNIOspring Grant Agreement No. 600388) and the Agency for Business Competitiveness
of the Government of Catalonia, ACCIÓ. M.I. thanks AGAUR for Beatriu de Pinós postdoctoral
grant (2013 BP-A00344). Z.L. thanks the China Scholarship Council for scholarship
support.
article_processing_charge: No
article_type: original
author:
- first_name: Taisiia
full_name: Berestok, Taisiia
last_name: Berestok
- first_name: Pablo
full_name: Guardia, Pablo
last_name: Guardia
- first_name: Javier
full_name: Blanco, Javier
last_name: Blanco
- first_name: Raquel
full_name: Nafria, Raquel
last_name: Nafria
- first_name: Pau
full_name: Torruella, Pau
last_name: Torruella
- first_name: Luis
full_name: López Conesa, Luis
last_name: López Conesa
- first_name: Sònia
full_name: Estradé, Sònia
last_name: Estradé
- first_name: Maria
full_name: Ibanez Sabate, Maria
id: 43C61214-F248-11E8-B48F-1D18A9856A87
last_name: Ibanez Sabate
orcid: 0000-0001-5013-2843
- first_name: Jonathan
full_name: De Roo, Jonathan
last_name: De Roo
- first_name: Zhishan
full_name: Luo, Zhishan
last_name: Luo
- first_name: Doris
full_name: Cadavid, Doris
last_name: Cadavid
- first_name: José
full_name: Martins, José
last_name: Martins
- first_name: Maksym
full_name: Kovalenko, Maksym
last_name: Kovalenko
- first_name: Francesca
full_name: Peiró, Francesca
last_name: Peiró
- first_name: Andreu
full_name: Cabot, Andreu
last_name: Cabot
citation:
ama: Berestok T, Guardia P, Blanco J, et al. Tuning branching in ceria nanocrystals.
Chemistry of Materials. 2017;29(10):4418-4424. doi:10.1021/acs.chemmater.7b00896
apa: Berestok, T., Guardia, P., Blanco, J., Nafria, R., Torruella, P., López Conesa,
L., … Cabot, A. (2017). Tuning branching in ceria nanocrystals. Chemistry of
Materials. American Chemical Society. https://doi.org/10.1021/acs.chemmater.7b00896
chicago: Berestok, Taisiia, Pablo Guardia, Javier Blanco, Raquel Nafria, Pau Torruella,
Luis López Conesa, Sònia Estradé, et al. “Tuning Branching in Ceria Nanocrystals.”
Chemistry of Materials. American Chemical Society, 2017. https://doi.org/10.1021/acs.chemmater.7b00896.
ieee: T. Berestok et al., “Tuning branching in ceria nanocrystals,” Chemistry
of Materials, vol. 29, no. 10. American Chemical Society, pp. 4418–4424, 2017.
ista: Berestok T, Guardia P, Blanco J, Nafria R, Torruella P, López Conesa L, Estradé
S, Ibáñez M, De Roo J, Luo Z, Cadavid D, Martins J, Kovalenko M, Peiró F, Cabot
A. 2017. Tuning branching in ceria nanocrystals. Chemistry of Materials. 29(10),
4418–4424.
mla: Berestok, Taisiia, et al. “Tuning Branching in Ceria Nanocrystals.” Chemistry
of Materials, vol. 29, no. 10, American Chemical Society, 2017, pp. 4418–24,
doi:10.1021/acs.chemmater.7b00896.
short: T. Berestok, P. Guardia, J. Blanco, R. Nafria, P. Torruella, L. López Conesa,
S. Estradé, M. Ibáñez, J. De Roo, Z. Luo, D. Cadavid, J. Martins, M. Kovalenko,
F. Peiró, A. Cabot, Chemistry of Materials 29 (2017) 4418–4424.
date_created: 2018-12-11T11:46:07Z
date_published: 2017-04-24T00:00:00Z
date_updated: 2024-03-05T12:19:17Z
day: '24'
doi: 10.1021/acs.chemmater.7b00896
extern: '1'
intvolume: ' 29'
issue: '10'
language:
- iso: eng
month: '04'
oa_version: None
page: 4418 - 4424
publication: Chemistry of Materials
publication_identifier:
eissn:
- 1520-5002
issn:
- 0897-4756
publication_status: published
publisher: American Chemical Society
publist_id: '7455'
quality_controlled: '1'
status: public
title: Tuning branching in ceria nanocrystals
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 29
year: '2017'
...
---
_id: '391'
abstract:
- lang: eng
text: 'Three-dimensional topological insulators are bulk insulators with Z 2 topological
electronic order that gives rise to conducting light-like surface states. These
surface electrons are exceptionally resistant to localization by non-magnetic
disorder, and have been adopted as the basis for a wide range of proposals to
achieve new quasiparticle species and device functionality. Recent studies have
yielded a surprise by showing that in spite of resisting localization, topological
insulator surface electrons can be reshaped by defects into distinctive resonance
states. Here we use numerical simulations and scanning tunnelling microscopy data
to show that these resonance states have significance well beyond the localized
regime usually associated with impurity bands. At native densities in the model
Bi2X3 (X=Bi, Te) compounds, defect resonance states are predicted to generate
a new quantum basis for an emergent electron gas that supports diffusive electrical
transport. '
author:
- first_name: Yishuai
full_name: Xu, Yishuai
last_name: Xu
- first_name: Janet
full_name: Chiu, Janet
last_name: Chiu
- first_name: Lin
full_name: Miao, Lin
last_name: Miao
- first_name: Haowei
full_name: He, Haowei
last_name: He
- first_name: Zhanybek
full_name: Alpichshev, Zhanybek
id: 45E67A2A-F248-11E8-B48F-1D18A9856A87
last_name: Alpichshev
orcid: 0000-0002-7183-5203
- first_name: Aharon
full_name: Kapitulnik, Aharon
last_name: Kapitulnik
- first_name: Rudro
full_name: Biswas, Rudro
last_name: Biswas
- first_name: Lewis
full_name: Wray, Lewis
last_name: Wray
citation:
ama: Xu Y, Chiu J, Miao L, et al. Disorder enabled band structure engineering of
a topological insulator surface. Nature Communications. 2017;8. doi:10.1038/ncomms14081
apa: Xu, Y., Chiu, J., Miao, L., He, H., Alpichshev, Z., Kapitulnik, A., … Wray,
L. (2017). Disorder enabled band structure engineering of a topological insulator
surface. Nature Communications. Nature Publishing Group. https://doi.org/10.1038/ncomms14081
chicago: Xu, Yishuai, Janet Chiu, Lin Miao, Haowei He, Zhanybek Alpichshev, Aharon
Kapitulnik, Rudro Biswas, and Lewis Wray. “Disorder Enabled Band Structure Engineering
of a Topological Insulator Surface.” Nature Communications. Nature Publishing
Group, 2017. https://doi.org/10.1038/ncomms14081.
ieee: Y. Xu et al., “Disorder enabled band structure engineering of a topological
insulator surface,” Nature Communications, vol. 8. Nature Publishing Group,
2017.
ista: Xu Y, Chiu J, Miao L, He H, Alpichshev Z, Kapitulnik A, Biswas R, Wray L.
2017. Disorder enabled band structure engineering of a topological insulator surface.
Nature Communications. 8.
mla: Xu, Yishuai, et al. “Disorder Enabled Band Structure Engineering of a Topological
Insulator Surface.” Nature Communications, vol. 8, Nature Publishing Group,
2017, doi:10.1038/ncomms14081.
short: Y. Xu, J. Chiu, L. Miao, H. He, Z. Alpichshev, A. Kapitulnik, R. Biswas,
L. Wray, Nature Communications 8 (2017).
date_created: 2018-12-11T11:46:12Z
date_published: 2017-02-03T00:00:00Z
date_updated: 2021-01-12T07:53:08Z
day: '03'
doi: 10.1038/ncomms14081
extern: '1'
intvolume: ' 8'
language:
- iso: eng
month: '02'
oa_version: None
publication: Nature Communications
publication_status: published
publisher: Nature Publishing Group
publist_id: '7438'
status: public
title: Disorder enabled band structure engineering of a topological insulator surface
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 8
year: '2017'
...
---
_id: '392'
abstract:
- lang: eng
text: We used femtosecond optical pump-probe spectroscopy to study the photoinduced
change in reflectivity of thin films of the electron-doped cuprate La2-xCexCuO4
(LCCO) with dopings of x=0.08 (underdoped) and x=0.11 (optimally doped). Above
Tc, we observe fluence-dependent relaxation rates that begin at a temperature
similar to the one where transport measurements first show signatures of antiferromagnetic
correlations. Upon suppressing superconductivity with a magnetic field, it is
found that the fluence and temperature dependence of relaxation rates are consistent
with bimolecular recombination of electrons and holes across a gap (2ΔAF) originating
from antiferromagnetic correlations which comprise the pseudogap in electron-doped
cuprates. This can be used to learn about coupling between electrons and high-energy
(ω>2ΔAF) excitations in these compounds and set limits on the time scales on
which antiferromagnetic correlations are static.
acknowledgement: Optical pump-probe work was supported by the Gordon and Betty Moore
Foundation's EPiQS initiative through Grant No. GBMF4540. Materials growth and characterization
was supported by AFOSR FA95501410332 and NSF DMR1410665.
author:
- first_name: Inna
full_name: Vishik, Inna
last_name: Vishik
- first_name: Fahad
full_name: Mahmood, Fahad
last_name: Mahmood
- first_name: Zhanybek
full_name: Alpichshev, Zhanybek
id: 45E67A2A-F248-11E8-B48F-1D18A9856A87
last_name: Alpichshev
orcid: 0000-0002-7183-5203
- first_name: Nuh
full_name: Gedik, Nuh
last_name: Gedik
- first_name: Joshu
full_name: Higgins, Joshu
last_name: Higgins
- first_name: Richard
full_name: Greene, Richard
last_name: Greene
citation:
ama: Vishik I, Mahmood F, Alpichshev Z, Gedik N, Higgins J, Greene R. Ultrafast
dynamics in the presence of antiferromagnetic correlations in electron doped cuprate
La2 xCexCuO4±δ. Physical Review B. 2017;95(11). doi:10.1103/PhysRevB.95.115125
apa: Vishik, I., Mahmood, F., Alpichshev, Z., Gedik, N., Higgins, J., & Greene,
R. (2017). Ultrafast dynamics in the presence of antiferromagnetic correlations
in electron doped cuprate La2 xCexCuO4±δ. Physical Review B. American Physical
Society. https://doi.org/10.1103/PhysRevB.95.115125
chicago: Vishik, Inna, Fahad Mahmood, Zhanybek Alpichshev, Nuh Gedik, Joshu Higgins,
and Richard Greene. “Ultrafast Dynamics in the Presence of Antiferromagnetic Correlations
in Electron Doped Cuprate La2 XCexCuO4±δ.” Physical Review B. American
Physical Society, 2017. https://doi.org/10.1103/PhysRevB.95.115125.
ieee: I. Vishik, F. Mahmood, Z. Alpichshev, N. Gedik, J. Higgins, and R. Greene,
“Ultrafast dynamics in the presence of antiferromagnetic correlations in electron
doped cuprate La2 xCexCuO4±δ,” Physical Review B, vol. 95, no. 11. American
Physical Society, 2017.
ista: Vishik I, Mahmood F, Alpichshev Z, Gedik N, Higgins J, Greene R. 2017. Ultrafast
dynamics in the presence of antiferromagnetic correlations in electron doped cuprate
La2 xCexCuO4±δ. Physical Review B. 95(11).
mla: Vishik, Inna, et al. “Ultrafast Dynamics in the Presence of Antiferromagnetic
Correlations in Electron Doped Cuprate La2 XCexCuO4±δ.” Physical Review B,
vol. 95, no. 11, American Physical Society, 2017, doi:10.1103/PhysRevB.95.115125.
short: I. Vishik, F. Mahmood, Z. Alpichshev, N. Gedik, J. Higgins, R. Greene, Physical
Review B 95 (2017).
date_created: 2018-12-11T11:46:13Z
date_published: 2017-03-13T00:00:00Z
date_updated: 2021-01-12T07:53:12Z
day: '13'
doi: 10.1103/PhysRevB.95.115125
extern: '1'
intvolume: ' 95'
issue: '11'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: http://dspace.mit.edu/handle/1721.1/109835
month: '03'
oa: 1
oa_version: None
publication: Physical Review B
publication_status: published
publisher: American Physical Society
publist_id: '7437'
status: public
title: Ultrafast dynamics in the presence of antiferromagnetic correlations in electron
doped cuprate La2 xCexCuO4±δ
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 95
year: '2017'
...
---
_id: '393'
abstract:
- lang: eng
text: 'We use a three-pulse ultrafast optical spectroscopy to study the relaxation
processes in a frustrated Mott insulator Na2IrO3. By being able to independently
produce the out-of-equilibrium bound states (excitons) of doublons and holons
with the first pulse and suppress the underlying antiferromagnetic order with
the second one, we were able to elucidate the relaxation mechanism of quasiparticles
in this system. By observing the difference in the exciton dynamics in the magnetically
ordered and disordered phases we found that the mass of this quasiparticle is
mostly determined by its interaction with the surrounding spins. '
acknowledgement: "Z.A. gratefully acknowledges discussions with P. A. Lee and A. Kemper.
A conversation with J. Zaanen was instrumental in clarifying the physical picture
described in this paper. We would also like to thank A. Kogar for thoroughly reading
the manuscript and making valuable comments. This work was supported by Army Research
Office Grant No. W911NF-15-1-0128 and Gordon and Betty Moore Foundation EPiQS Initiative
through Grant No. GBMF4540 (time resolved optical spectroscopy), Skoltech, as part
of the Skoltech NGP program (theory) and National Science Foundation Grant No. DMR-1265162
(material growth).\r\n\r\n"
author:
- first_name: Zhanybek
full_name: Alpichshev, Zhanybek
id: 45E67A2A-F248-11E8-B48F-1D18A9856A87
last_name: Alpichshev
orcid: 0000-0002-7183-5203
- first_name: Edbert
full_name: Sie, Edbert
last_name: Sie
- first_name: Fahad
full_name: Mahmood, Fahad
last_name: Mahmood
- first_name: Gang
full_name: Cao, Gang
last_name: Cao
- first_name: Nuh
full_name: Gedik, Nuh
last_name: Gedik
citation:
ama: Alpichshev Z, Sie E, Mahmood F, Cao G, Gedik N. Origin of the exciton mass
in the frustrated Mott insulator Na2IrO3. Physical Review B. 2017;96(23).
doi:10.1103/PhysRevB.96.235141
apa: Alpichshev, Z., Sie, E., Mahmood, F., Cao, G., & Gedik, N. (2017). Origin
of the exciton mass in the frustrated Mott insulator Na2IrO3. Physical Review
B. American Physical Society. https://doi.org/10.1103/PhysRevB.96.235141
chicago: Alpichshev, Zhanybek, Edbert Sie, Fahad Mahmood, Gang Cao, and Nuh Gedik.
“Origin of the Exciton Mass in the Frustrated Mott Insulator Na2IrO3.” Physical
Review B. American Physical Society, 2017. https://doi.org/10.1103/PhysRevB.96.235141.
ieee: Z. Alpichshev, E. Sie, F. Mahmood, G. Cao, and N. Gedik, “Origin of the exciton
mass in the frustrated Mott insulator Na2IrO3,” Physical Review B, vol.
96, no. 23. American Physical Society, 2017.
ista: Alpichshev Z, Sie E, Mahmood F, Cao G, Gedik N. 2017. Origin of the exciton
mass in the frustrated Mott insulator Na2IrO3. Physical Review B. 96(23).
mla: Alpichshev, Zhanybek, et al. “Origin of the Exciton Mass in the Frustrated
Mott Insulator Na2IrO3.” Physical Review B, vol. 96, no. 23, American Physical
Society, 2017, doi:10.1103/PhysRevB.96.235141.
short: Z. Alpichshev, E. Sie, F. Mahmood, G. Cao, N. Gedik, Physical Review B 96
(2017).
date_created: 2018-12-11T11:46:13Z
date_published: 2017-12-26T00:00:00Z
date_updated: 2021-01-12T07:53:16Z
day: '26'
doi: 10.1103/PhysRevB.96.235141
extern: '1'
intvolume: ' 96'
issue: '23'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: http://dspace.mit.edu/handle/1721.1/114259
month: '12'
oa: 1
oa_version: None
publication: Physical Review B
publication_status: published
publisher: American Physical Society
publist_id: '7436'
status: public
title: Origin of the exciton mass in the frustrated Mott insulator Na2IrO3
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 96
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).'
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: 2024-02-28T12:59:37Z
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
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/abs/1310.4613v3
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: 4435EBFC-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
date_created: 2018-12-11T11:46:26Z
date_published: 2017-01-01T00:00:00Z
date_updated: 2023-10-17T11:48:03Z
day: '01'
department:
- _id: DaAl
external_id:
arxiv:
- '1610.02132'
intvolume: ' 2017'
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:
- '10495258'
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: 2DF688A6-F248-11E8-B48F-1D18A9856A87
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
date_created: 2018-12-11T11:46:26Z
date_published: 2017-01-01T00:00:00Z
date_updated: 2023-10-17T12:31:15Z
day: '01'
ddc:
- '000'
department:
- _id: DaAl
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'
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: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: ' 70'
year: '2017'
...