---
_id: '118'
abstract:
- lang: eng
text: While the penetration of objects into granular media is well-studied, there
is little understanding of how objects settle in gravities, geff, different from
that of Earth - a scenario potentially relevant to the geomorphology of planets
and asteroids and also to their exploration using man-made devices. By conducting
experiments in an accelerating frame, we explore geff ranging from 0.4 g to 1.2
g. Surprisingly, we find that the rest depth is independent of geff and also that
the time required for the object to come to rest scales like geff-1/2. With discrete
element modeling simulations, we reproduce the experimental results and extend
the range of geff to objects as small as asteroids and as large as Jupiter. Our
results shed light on the initial stage of sedimentation into dry granular media
across a range of celestial bodies and also have implications for the design of
man-made, extraterrestrial vehicles and structures. Key Points The settling depth
in granular media is independent of gravity The settling time scales like g-1/2
Layering driven by granular sedimentation should be similar.
acknowledgement: 'The Spanish MINECO project FIS2011-26675, the PIUNA program (U.
Navarra), and the Project 29942WL (Fonds de Solidarité Prioritaire France-Cuba)
have partially supported this research. '
author:
- first_name: Ernesto
full_name: Altshuler, Ernesto
last_name: Altshuler
- first_name: H
full_name: Torres, H
last_name: Torres
- first_name: A
full_name: González_Pita, A
last_name: González_Pita
- first_name: Colina G
full_name: Sánchez, Colina G
last_name: Sánchez
- first_name: Carlos
full_name: Pérez Penichet, Carlos
last_name: Pérez Penichet
- first_name: Scott R
full_name: Waitukaitis, Scott R
id: 3A1FFC16-F248-11E8-B48F-1D18A9856A87
last_name: Waitukaitis
orcid: 0000-0002-2299-3176
- first_name: Rauól
full_name: Hidalgo, Rauól
last_name: Hidalgo
citation:
ama: Altshuler E, Torres H, González_Pita A, et al. Settling into dry granular media
in different gravities. Geophysical Research Letters. 2014;41(9):3032-3037.
doi:10.1002/2014GL059229
apa: Altshuler, E., Torres, H., González_Pita, A., Sánchez, C. G., Pérez Penichet,
C., Waitukaitis, S. R., & Hidalgo, R. (2014). Settling into dry granular media
in different gravities. Geophysical Research Letters. Wiley-Blackwell.
https://doi.org/10.1002/2014GL059229
chicago: Altshuler, Ernesto, H Torres, A González_Pita, Colina G Sánchez, Carlos
Pérez Penichet, Scott R Waitukaitis, and Rauól Hidalgo. “Settling into Dry Granular
Media in Different Gravities.” Geophysical Research Letters. Wiley-Blackwell,
2014. https://doi.org/10.1002/2014GL059229.
ieee: E. Altshuler et al., “Settling into dry granular media in different
gravities,” Geophysical Research Letters, vol. 41, no. 9. Wiley-Blackwell,
pp. 3032–3037, 2014.
ista: Altshuler E, Torres H, González_Pita A, Sánchez CG, Pérez Penichet C, Waitukaitis
SR, Hidalgo R. 2014. Settling into dry granular media in different gravities.
Geophysical Research Letters. 41(9), 3032–3037.
mla: Altshuler, Ernesto, et al. “Settling into Dry Granular Media in Different Gravities.”
Geophysical Research Letters, vol. 41, no. 9, Wiley-Blackwell, 2014, pp.
3032–37, doi:10.1002/2014GL059229.
short: E. Altshuler, H. Torres, A. González_Pita, C.G. Sánchez, C. Pérez Penichet,
S.R. Waitukaitis, R. Hidalgo, Geophysical Research Letters 41 (2014) 3032–3037.
date_created: 2018-12-11T11:44:43Z
date_published: 2014-05-16T00:00:00Z
date_updated: 2021-01-12T06:48:53Z
day: '16'
doi: 10.1002/2014GL059229
extern: '1'
intvolume: ' 41'
issue: '9'
language:
- iso: eng
month: '05'
oa_version: None
page: 3032 - 3037
publication: Geophysical Research Letters
publication_status: published
publisher: Wiley-Blackwell
publist_id: '7936'
quality_controlled: '1'
status: public
title: Settling into dry granular media in different gravities
type: journal_article
user_id: 3E5EF7F0-F248-11E8-B48F-1D18A9856A87
volume: 41
year: '2014'
...
---
_id: '11855'
abstract:
- lang: eng
text: 'The decremental single-source shortest paths (SSSP) problem concerns maintaining
the distances between a given source node s to every node in an n-node m-edge
graph G undergoing edge deletions. While its static counterpart can be easily
solved in near-linear time, this decremental problem is much more challenging
even in the undirected unweighted case. In this case, the classic O(mn) total
update time of Even and Shiloach (JACM 1981) has been the fastest known algorithm
for three decades. With the loss of a (1 + ε)-approximation factor, the running
time was recently improved to O(n 2+o(1) ) by Bernstein and Roditty (SODA 2011),
and more recently to O(n 1.8+o(1) + m 1+o(1) ) by Henzinger, Krinninger, and Nanongkai
(SODA 2014). In this paper, we finally bring the running time of this case down
to near-linear: We give a (1 + ε)-approximation algorithm with O(m 1+o(1) ) total
update time, thus obtaining near-linear time. Moreover, we obtain O(m 1+o(1) log
W) time for the weighted case, where the edge weights are integers from 1 to W.
The only prior work on weighted graphs in o(mn log W) time is the O(mn 0.986 log
W)-time algorithm by Henzinger, Krinninger, and Nanongkai (STOC 2014) which works
for the general weighted directed case. In contrast to the previous results which
rely on maintaining a sparse emulator, our algorithm relies on maintaining a so-called
sparse (d, ε)-hop set introduced by Cohen (JACM 2000) in the PRAM literature.
A (d, ε)-hop set of a graph G = (V, E) is a set E'' of weighted edges such that
the distance between any pair of nodes in G can be (1 + ε)-approximated by their
d-hop distance (given by a path containing at most d edges) on G''=(V, E∪E'').
Our algorithm can maintain an (n o(1) , ε)-hop set of near-linear size in near-linear
time under edge deletions. It is the first of its kind to the best of our knowledge.
To maintain the distances on this hop set, we develop a monotone bounded-hop Even-Shiloach
tree. It results from extending and combining the monotone Even-Shiloach tree
of Henzinger, Krinninger, and Nanongkai (FOCS 2013) with the bounded-hop SSSP
technique of Bernstein (STOC 2013). These two new tools might be of independent
interest.'
article_processing_charge: No
arxiv: 1
author:
- first_name: Monika H
full_name: Henzinger, Monika H
id: 540c9bbd-f2de-11ec-812d-d04a5be85630
last_name: Henzinger
orcid: 0000-0002-5008-6530
- first_name: Sebastian
full_name: Krinninger, Sebastian
last_name: Krinninger
- first_name: Danupon
full_name: Nanongkai, Danupon
last_name: Nanongkai
citation:
ama: 'Henzinger MH, Krinninger S, Nanongkai D. Decremental single-source shortest
paths on undirected graphs in near-linear total update time. In: 55th Annual
Symposium on Foundations of Computer Science. Institute of Electrical and
Electronics Engineers; 2014:146-155. doi:10.1109/focs.2014.24'
apa: 'Henzinger, M. H., Krinninger, S., & Nanongkai, D. (2014). Decremental
single-source shortest paths on undirected graphs in near-linear total update
time. In 55th Annual Symposium on Foundations of Computer Science (pp.
146–155). Philadelphia, PA, United States: Institute of Electrical and Electronics
Engineers. https://doi.org/10.1109/focs.2014.24'
chicago: Henzinger, Monika H, Sebastian Krinninger, and Danupon Nanongkai. “Decremental
Single-Source Shortest Paths on Undirected Graphs in near-Linear Total Update
Time.” In 55th Annual Symposium on Foundations of Computer Science, 146–55.
Institute of Electrical and Electronics Engineers, 2014. https://doi.org/10.1109/focs.2014.24.
ieee: M. H. Henzinger, S. Krinninger, and D. Nanongkai, “Decremental single-source
shortest paths on undirected graphs in near-linear total update time,” in 55th
Annual Symposium on Foundations of Computer Science, Philadelphia, PA, United
States, 2014, pp. 146–155.
ista: 'Henzinger MH, Krinninger S, Nanongkai D. 2014. Decremental single-source
shortest paths on undirected graphs in near-linear total update time. 55th Annual
Symposium on Foundations of Computer Science. FOCS: Annual Symposium on Foundations
of Computer Science, 146–155.'
mla: Henzinger, Monika H., et al. “Decremental Single-Source Shortest Paths on Undirected
Graphs in near-Linear Total Update Time.” 55th Annual Symposium on Foundations
of Computer Science, Institute of Electrical and Electronics Engineers, 2014,
pp. 146–55, doi:10.1109/focs.2014.24.
short: M.H. Henzinger, S. Krinninger, D. Nanongkai, in:, 55th Annual Symposium on
Foundations of Computer Science, Institute of Electrical and Electronics Engineers,
2014, pp. 146–155.
conference:
end_date: 2014-10-21
location: Philadelphia, PA, United States
name: 'FOCS: Annual Symposium on Foundations of Computer Science'
start_date: 2014-10-18
date_created: 2022-08-16T08:14:33Z
date_published: 2014-10-01T00:00:00Z
date_updated: 2023-02-21T16:27:34Z
day: '01'
doi: 10.1109/focs.2014.24
extern: '1'
external_id:
arxiv:
- '1402.0054'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/abs/1402.0054
month: '10'
oa: 1
oa_version: Preprint
page: 146-155
publication: 55th Annual Symposium on Foundations of Computer Science
publication_identifier:
eisbn:
- 978-1-4799-6517-5
issn:
- 0272-5428
publication_status: published
publisher: Institute of Electrical and Electronics Engineers
quality_controlled: '1'
related_material:
record:
- id: '11768'
relation: later_version
status: public
scopus_import: '1'
status: public
title: Decremental single-source shortest paths on undirected graphs in near-linear
total update time
type: conference
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
year: '2014'
...
---
_id: '11870'
abstract:
- lang: eng
text: "We consider dynamic algorithms for maintaining Single-Source Reachability
(SSR) and approximate Single-Source Shortest Paths (SSSP) on n-node m-edge directed
graphs under edge deletions (decremental algorithms). The previous fastest algorithm
for SSR and SSSP goes back three decades to Even and Shiloach (JACM 1981); it
has O(1) query time and O(mn) total update time (i.e., linear amortized update
time if all edges are deleted). This algorithm serves as a building block for
several other dynamic algorithms. The question whether its total update time can
be improved is a major, long standing, open problem.\r\n\r\nIn this paper, we
answer this question affirmatively. We obtain a randomized algorithm which, in
a simplified form, achieves an Õ(mn0.984) expected total update time for SSR and
(1 + ε)-approximate SSSP, where Õ(·) hides poly log n. We also extend our algorithm
to achieve roughly the same running time for Strongly Connected Components (SCC),
improving the algorithm of Roditty and Zwick (FOCS 2002), and an algorithm that
improves the Õ (mn log W)-time algorithm of Bernstein (STOC 2013) for approximating
SSSP on weighted directed graphs, where the edge weights are integers from 1 to
W. All our algorithms have constant query time in the worst case."
article_number: 674 - 683
article_processing_charge: No
arxiv: 1
author:
- first_name: Monika H
full_name: Henzinger, Monika H
id: 540c9bbd-f2de-11ec-812d-d04a5be85630
last_name: Henzinger
orcid: 0000-0002-5008-6530
- first_name: Sebastian
full_name: Krinninger, Sebastian
last_name: Krinninger
- first_name: Danupon
full_name: Nanongkai, Danupon
last_name: Nanongkai
citation:
ama: 'Henzinger MH, Krinninger S, Nanongkai D. Sublinear-time decremental algorithms
for single-source reachability and shortest paths on directed graphs. In: 46th
Annual ACM Symposium on Theory of Computing. Association for Computing Machinery;
2014. doi:10.1145/2591796.2591869'
apa: 'Henzinger, M. H., Krinninger, S., & Nanongkai, D. (2014). Sublinear-time
decremental algorithms for single-source reachability and shortest paths on directed
graphs. In 46th Annual ACM Symposium on Theory of Computing. New York,
NY, United States: Association for Computing Machinery. https://doi.org/10.1145/2591796.2591869'
chicago: Henzinger, Monika H, Sebastian Krinninger, and Danupon Nanongkai. “Sublinear-Time
Decremental Algorithms for Single-Source Reachability and Shortest Paths on Directed
Graphs.” In 46th Annual ACM Symposium on Theory of Computing. Association
for Computing Machinery, 2014. https://doi.org/10.1145/2591796.2591869.
ieee: M. H. Henzinger, S. Krinninger, and D. Nanongkai, “Sublinear-time decremental
algorithms for single-source reachability and shortest paths on directed graphs,”
in 46th Annual ACM Symposium on Theory of Computing, New York, NY, United
States, 2014.
ista: 'Henzinger MH, Krinninger S, Nanongkai D. 2014. Sublinear-time decremental
algorithms for single-source reachability and shortest paths on directed graphs.
46th Annual ACM Symposium on Theory of Computing. STOC: Symposium on Theory of
Computing, 674–683.'
mla: Henzinger, Monika H., et al. “Sublinear-Time Decremental Algorithms for Single-Source
Reachability and Shortest Paths on Directed Graphs.” 46th Annual ACM Symposium
on Theory of Computing, 674–683, Association for Computing Machinery, 2014,
doi:10.1145/2591796.2591869.
short: M.H. Henzinger, S. Krinninger, D. Nanongkai, in:, 46th Annual ACM Symposium
on Theory of Computing, Association for Computing Machinery, 2014.
conference:
end_date: 2014-06-03
location: New York, NY, United States
name: 'STOC: Symposium on Theory of Computing'
start_date: 2014-05-31
date_created: 2022-08-16T09:41:57Z
date_published: 2014-05-01T00:00:00Z
date_updated: 2023-02-17T11:18:52Z
day: '01'
doi: 10.1145/2591796.2591869
extern: '1'
external_id:
arxiv:
- '1504.07959'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/abs/1504.07959
month: '05'
oa: 1
oa_version: Preprint
publication: 46th Annual ACM Symposium on Theory of Computing
publication_identifier:
isbn:
- 978-145032710-7
issn:
- 0737-8017
publication_status: published
publisher: Association for Computing Machinery
quality_controlled: '1'
scopus_import: '1'
status: public
title: Sublinear-time decremental algorithms for single-source reachability and shortest
paths on directed graphs
type: conference
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
year: '2014'
...
---
_id: '11875'
abstract:
- lang: eng
text: We present the first deterministic data structures for maintaining approximate
minimum vertex cover and maximum matching in a fully dynamic graph in time per
update. In particular, for minimum vertex cover we provide deterministic data
structures for maintaining a (2 + ε) approximation in O(log n/ε2) amortized time
per update. For maximum matching, we show how to maintain a (3 + e) approximation
in O(m1/3/ε2) amortized time per update, and a (4 + ε) approximation in O(m1/3/ε2)
worst-case time per update. Our data structure for fully dynamic minimum vertex
cover is essentially near-optimal and settles an open problem by Onak and Rubinfeld
[13].
article_processing_charge: No
arxiv: 1
author:
- first_name: Sayan
full_name: Bhattacharya, Sayan
last_name: Bhattacharya
- first_name: Monika H
full_name: Henzinger, Monika H
id: 540c9bbd-f2de-11ec-812d-d04a5be85630
last_name: Henzinger
orcid: 0000-0002-5008-6530
- first_name: Giuseppe F.
full_name: Italiano, Giuseppe F.
last_name: Italiano
citation:
ama: 'Bhattacharya S, Henzinger MH, Italiano GF. Deterministic fully dynamic data
structures for vertex cover and matching. In: 26th Annual ACM-SIAM Symposium
on Discrete Algorithms. Society for Industrial and Applied Mathematics; 2014:785-804.
doi:10.1137/1.9781611973730.54'
apa: 'Bhattacharya, S., Henzinger, M. H., & Italiano, G. F. (2014). Deterministic
fully dynamic data structures for vertex cover and matching. In 26th Annual
ACM-SIAM Symposium on Discrete Algorithms (pp. 785–804). San Diego, CA, United
States: Society for Industrial and Applied Mathematics. https://doi.org/10.1137/1.9781611973730.54'
chicago: Bhattacharya, Sayan, Monika H Henzinger, and Giuseppe F. Italiano. “Deterministic
Fully Dynamic Data Structures for Vertex Cover and Matching.” In 26th Annual
ACM-SIAM Symposium on Discrete Algorithms, 785–804. Society for Industrial
and Applied Mathematics, 2014. https://doi.org/10.1137/1.9781611973730.54.
ieee: S. Bhattacharya, M. H. Henzinger, and G. F. Italiano, “Deterministic fully
dynamic data structures for vertex cover and matching,” in 26th Annual ACM-SIAM
Symposium on Discrete Algorithms, San Diego, CA, United States, 2014, pp.
785–804.
ista: 'Bhattacharya S, Henzinger MH, Italiano GF. 2014. Deterministic fully dynamic
data structures for vertex cover and matching. 26th Annual ACM-SIAM Symposium
on Discrete Algorithms. SODA: Symposium on Discrete Algorithms, 785–804.'
mla: Bhattacharya, Sayan, et al. “Deterministic Fully Dynamic Data Structures for
Vertex Cover and Matching.” 26th Annual ACM-SIAM Symposium on Discrete Algorithms,
Society for Industrial and Applied Mathematics, 2014, pp. 785–804, doi:10.1137/1.9781611973730.54.
short: S. Bhattacharya, M.H. Henzinger, G.F. Italiano, in:, 26th Annual ACM-SIAM
Symposium on Discrete Algorithms, Society for Industrial and Applied Mathematics,
2014, pp. 785–804.
conference:
end_date: 2015-01-06
location: San Diego, CA, United States
name: 'SODA: Symposium on Discrete Algorithms'
start_date: 2015-01-04
date_created: 2022-08-16T12:36:42Z
date_published: 2014-01-01T00:00:00Z
date_updated: 2023-02-21T16:32:06Z
day: '01'
doi: 10.1137/1.9781611973730.54
extern: '1'
external_id:
arxiv:
- '1412.1318'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/abs/1412.1318
month: '01'
oa: 1
oa_version: Preprint
page: 785-804
publication: 26th Annual ACM-SIAM Symposium on Discrete Algorithms
publication_identifier:
eisbn:
- 978-1-61197-373-0
isbn:
- 978-1-61197-374-7
publication_status: published
publisher: Society for Industrial and Applied Mathematics
quality_controlled: '1'
related_material:
record:
- id: '11890'
relation: later_version
status: public
scopus_import: '1'
status: public
title: Deterministic fully dynamic data structures for vertex cover and matching
type: conference
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
year: '2014'
...
---
_id: '11876'
abstract:
- lang: eng
text: "We study dynamic (1 + ∊)-approximation algorithms for the single-source shortest
paths problem in an unweighted undirected n-node m-edge graph under edge deletions.
The fastest algorithm for this problem is an algorithm with O(n2+o(1)) total update
time and constant query time by Bernstein and Roditty (SODA 2011). In this paper,
we improve the total update time to O(n1.8+o(1) + m1+o(1)) while keeping the query
time constant. This running time is essentially tight when m = Ω(n1.8) since we
need Ω(m) time even in the static setting. For smaller values of m, the running
time of our algorithm is subquadratic, and is the first that breaks through the
quadratic time barrier.\r\n\r\nIn obtaining this result, we develop a fast algorithm
for what we call center cover data structure. We also make non-trivial extensions
to our previous techniques called lazy-update and monotone Even-Shiloach trees
(ICALP 2013 and FOCS 2013). As by-products of our new techniques, we obtain two
new results for the decremental all-pairs shortest-paths problem. Our first result
is the first approximation algorithm whose total update time is faster than Õ(mn)
for all values of m. Our second result is a new trade-off between the total update
time and the additive approximation guarantee."
article_processing_charge: No
author:
- first_name: Monika H
full_name: Henzinger, Monika H
id: 540c9bbd-f2de-11ec-812d-d04a5be85630
last_name: Henzinger
orcid: 0000-0002-5008-6530
- first_name: Sebastian
full_name: Krinninger, Sebastian
last_name: Krinninger
- first_name: Danupon
full_name: Nanongkai, Danupon
last_name: Nanongkai
citation:
ama: 'Henzinger MH, Krinninger S, Nanongkai D. A subquadratic-time algorithm for
decremental single-source shortest paths. In: 25th Annual ACM-SIAM Symposium
on Discrete Algorithms. Society for Industrial and Applied Mathematics; 2014:1053-1072.
doi:10.1137/1.9781611973402.79'
apa: 'Henzinger, M. H., Krinninger, S., & Nanongkai, D. (2014). A subquadratic-time
algorithm for decremental single-source shortest paths. In 25th Annual ACM-SIAM
Symposium on Discrete Algorithms (pp. 1053–1072). Portland, OR, United States:
Society for Industrial and Applied Mathematics. https://doi.org/10.1137/1.9781611973402.79'
chicago: Henzinger, Monika H, Sebastian Krinninger, and Danupon Nanongkai. “A Subquadratic-Time
Algorithm for Decremental Single-Source Shortest Paths.” In 25th Annual ACM-SIAM
Symposium on Discrete Algorithms, 1053–72. Society for Industrial and Applied
Mathematics, 2014. https://doi.org/10.1137/1.9781611973402.79.
ieee: M. H. Henzinger, S. Krinninger, and D. Nanongkai, “A subquadratic-time algorithm
for decremental single-source shortest paths,” in 25th Annual ACM-SIAM Symposium
on Discrete Algorithms, Portland, OR, United States, 2014, pp. 1053–1072.
ista: 'Henzinger MH, Krinninger S, Nanongkai D. 2014. A subquadratic-time algorithm
for decremental single-source shortest paths. 25th Annual ACM-SIAM Symposium on
Discrete Algorithms. SODA: Symposium on Discrete Algorithms, 1053–1072.'
mla: Henzinger, Monika H., et al. “A Subquadratic-Time Algorithm for Decremental
Single-Source Shortest Paths.” 25th Annual ACM-SIAM Symposium on Discrete Algorithms,
Society for Industrial and Applied Mathematics, 2014, pp. 1053–72, doi:10.1137/1.9781611973402.79.
short: M.H. Henzinger, S. Krinninger, D. Nanongkai, in:, 25th Annual ACM-SIAM Symposium
on Discrete Algorithms, Society for Industrial and Applied Mathematics, 2014,
pp. 1053–1072.
conference:
end_date: 2014-01-07
location: Portland, OR, United States
name: 'SODA: Symposium on Discrete Algorithms'
start_date: 2014-01-05
date_created: 2022-08-16T12:58:31Z
date_published: 2014-01-01T00:00:00Z
date_updated: 2023-02-17T11:58:42Z
day: '01'
doi: 10.1137/1.9781611973402.79
extern: '1'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1137/1.9781611973402.79
month: '01'
oa: 1
oa_version: Published Version
page: 1053-1072
publication: 25th Annual ACM-SIAM Symposium on Discrete Algorithms
publication_identifier:
eisbn:
- 978-1-61197-340-2
isbn:
- 978-1-61197-338-9
publication_status: published
publisher: Society for Industrial and Applied Mathematics
quality_controlled: '1'
scopus_import: '1'
status: public
title: A subquadratic-time algorithm for decremental single-source shortest paths
type: conference
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
year: '2014'
...
---
_id: '119'
abstract:
- lang: eng
text: Observations of flowing granular matter have suggested that same-material
tribocharging depends on particle size, typically rendering large grains positive
and small ones negative. Models assuming the transfer of trapped electrons can
account for this trend, but have not been validated. Tracking individual grains
in an electric field, we show quantitatively that charge is transferred based
on size between materially identical grains. However, the surface density of trapped
electrons, measured independently by thermoluminescence techniques, is orders
of magnitude too small to account for the scale of charge transferred. This reveals
that trapped electrons are not a necessary ingredient for same-material tribocharging.
acknowledgement: This work was supported by the NSF through DMR-1309611. Access to
the shared experimental facilities provided by the NSF-supported Chicago MRSEC (DMR-0820054)
is gratefully acknowledged. S. L. F. and J. L. P. acknowledge funding from UIC NSF
Grants No. 0850830 and No. 0602308. S. R. W. acknowledges support from a University
of Chicago Millikan Fellowship and from Mrs. Joan Winstein through the Winstein
Prize for Instrumentation.
article_number: '218001'
arxiv: 1
author:
- first_name: Scott R
full_name: Waitukaitis, Scott R
id: 3A1FFC16-F248-11E8-B48F-1D18A9856A87
last_name: Waitukaitis
orcid: 0000-0002-2299-3176
- first_name: Victor
full_name: Lee, Victor
last_name: Lee
- first_name: James
full_name: Pierson, James
last_name: Pierson
- first_name: Steven
full_name: Forman, Steven
last_name: Forman
- first_name: Heinrich
full_name: Jaeger, Heinrich
last_name: Jaeger
citation:
ama: Waitukaitis SR, Lee V, Pierson J, Forman S, Jaeger H. Size-dependent same-material
tribocharging in insulating grains. APS Physics, Physical Review Letters.
2014;112(21). doi:10.1103/PhysRevLett.112.218001
apa: Waitukaitis, S. R., Lee, V., Pierson, J., Forman, S., & Jaeger, H. (2014).
Size-dependent same-material tribocharging in insulating grains. APS Physics,
Physical Review Letters. American Physical Society. https://doi.org/10.1103/PhysRevLett.112.218001
chicago: Waitukaitis, Scott R, Victor Lee, James Pierson, Steven Forman, and Heinrich
Jaeger. “Size-Dependent Same-Material Tribocharging in Insulating Grains.” APS
Physics, Physical Review Letters. American Physical Society, 2014. https://doi.org/10.1103/PhysRevLett.112.218001.
ieee: S. R. Waitukaitis, V. Lee, J. Pierson, S. Forman, and H. Jaeger, “Size-dependent
same-material tribocharging in insulating grains,” APS Physics, Physical Review
Letters, vol. 112, no. 21. American Physical Society, 2014.
ista: Waitukaitis SR, Lee V, Pierson J, Forman S, Jaeger H. 2014. Size-dependent
same-material tribocharging in insulating grains. APS Physics, Physical Review
Letters. 112(21), 218001.
mla: Waitukaitis, Scott R., et al. “Size-Dependent Same-Material Tribocharging in
Insulating Grains.” APS Physics, Physical Review Letters, vol. 112, no.
21, 218001, American Physical Society, 2014, doi:10.1103/PhysRevLett.112.218001.
short: S.R. Waitukaitis, V. Lee, J. Pierson, S. Forman, H. Jaeger, APS Physics,
Physical Review Letters 112 (2014).
date_created: 2018-12-11T11:44:44Z
date_published: 2014-05-30T00:00:00Z
date_updated: 2021-01-12T06:48:58Z
day: '30'
doi: 10.1103/PhysRevLett.112.218001
extern: '1'
external_id:
arxiv:
- '1309.2578'
intvolume: ' 112'
issue: '21'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/abs/1309.2578
month: '05'
oa: 1
oa_version: Submitted Version
publication: APS Physics, Physical Review Letters
publication_status: published
publisher: American Physical Society
publist_id: '7935'
quality_controlled: '1'
status: public
title: Size-dependent same-material tribocharging in insulating grains
type: journal_article
user_id: 3E5EF7F0-F248-11E8-B48F-1D18A9856A87
volume: 112
year: '2014'
...
---
_id: '11967'
abstract:
- lang: eng
text: An experimentally easy to perform method for the generation of alumina-supported
Fe3O4 nanoparticles [(6±1) nm size, 0.67 wt %]and the use of this material in
hydrazine-mediated heterogeneously catalyzed reductions of nitroarenes to anilines
under batch and continuous-flow conditions is presented. The bench-stable, reusable
nano-Fe3O4@Al2O3 catalyst can selectively reduce functionalized nitroarenes at
1 mol % catalyst loading by using a 20 mol % excess of hydrazine hydrate in an
elevated temperature regime (150 °C, reaction time 2–6 min in batch). For continuous-flow
processing, the catalyst material is packed into dedicated cartridges and used
in a commercially available high-temperature/-pressure flow device. In continuous
mode, reaction times can be reduced to less than 1 min at 150 °C (30 bar back
pressure) in a highly intensified process. The nano-Fe3O4@Al2O3 catalyst demonstrated
stable reduction of nitrobenzene (0.5 M in MeOH) for more than 10 h on stream
at a productivity of 30 mmol h−1 (0.72 mol per day). Importantly, virtually no
leaching of the catalytically active material could be observed by inductively
coupled plasma MS monitoring.
article_processing_charge: No
article_type: original
author:
- first_name: Mojtaba Mirhosseini
full_name: Moghaddam, Mojtaba Mirhosseini
last_name: Moghaddam
- first_name: Bartholomäus
full_name: Pieber, Bartholomäus
id: 93e5e5b2-0da6-11ed-8a41-af589a024726
last_name: Pieber
orcid: 0000-0001-8689-388X
- first_name: Toma
full_name: Glasnov, Toma
last_name: Glasnov
- first_name: C. Oliver
full_name: Kappe, C. Oliver
last_name: Kappe
citation:
ama: Moghaddam MM, Pieber B, Glasnov T, Kappe CO. Immobilized iron oxide nanoparticles
as stable and reusable catalysts for hydrazine-mediated nitro reductions in continuous
flow. ChemSusChem. 2014;7(11):3122-3131. doi:10.1002/cssc.201402455
apa: Moghaddam, M. M., Pieber, B., Glasnov, T., & Kappe, C. O. (2014). Immobilized
iron oxide nanoparticles as stable and reusable catalysts for hydrazine-mediated
nitro reductions in continuous flow. ChemSusChem. Wiley. https://doi.org/10.1002/cssc.201402455
chicago: Moghaddam, Mojtaba Mirhosseini, Bartholomäus Pieber, Toma Glasnov, and
C. Oliver Kappe. “Immobilized Iron Oxide Nanoparticles as Stable and Reusable
Catalysts for Hydrazine-Mediated Nitro Reductions in Continuous Flow.” ChemSusChem.
Wiley, 2014. https://doi.org/10.1002/cssc.201402455.
ieee: M. M. Moghaddam, B. Pieber, T. Glasnov, and C. O. Kappe, “Immobilized iron
oxide nanoparticles as stable and reusable catalysts for hydrazine-mediated nitro
reductions in continuous flow,” ChemSusChem, vol. 7, no. 11. Wiley, pp.
3122–3131, 2014.
ista: Moghaddam MM, Pieber B, Glasnov T, Kappe CO. 2014. Immobilized iron oxide
nanoparticles as stable and reusable catalysts for hydrazine-mediated nitro reductions
in continuous flow. ChemSusChem. 7(11), 3122–3131.
mla: Moghaddam, Mojtaba Mirhosseini, et al. “Immobilized Iron Oxide Nanoparticles
as Stable and Reusable Catalysts for Hydrazine-Mediated Nitro Reductions in Continuous
Flow.” ChemSusChem, vol. 7, no. 11, Wiley, 2014, pp. 3122–31, doi:10.1002/cssc.201402455.
short: M.M. Moghaddam, B. Pieber, T. Glasnov, C.O. Kappe, ChemSusChem 7 (2014) 3122–3131.
date_created: 2022-08-25T08:36:54Z
date_published: 2014-11-01T00:00:00Z
date_updated: 2023-02-21T10:09:42Z
day: '01'
doi: 10.1002/cssc.201402455
extern: '1'
external_id:
pmid:
- '25209099'
intvolume: ' 7'
issue: '11'
language:
- iso: eng
month: '11'
oa_version: None
page: 3122-3131
pmid: 1
publication: ChemSusChem
publication_identifier:
eissn:
- 1864-564X
issn:
- 1864-5631
publication_status: published
publisher: Wiley
quality_controlled: '1'
scopus_import: '1'
status: public
title: Immobilized iron oxide nanoparticles as stable and reusable catalysts for hydrazine-mediated
nitro reductions in continuous flow
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 7
year: '2014'
...
---
_id: '11968'
abstract:
- lang: eng
text: 'Membrane phospholipids typically contain fatty acids (FAs) of 16 and 18 carbon
atoms. This particular chain length is evolutionarily highly conserved and presumably
provides maximum stability and dynamic properties to biological membranes in response
to nutritional or environmental cues. Here, we show that the relative proportion
of C16 versus C18 FAs is regulated by the activity of acetyl-CoA carboxylase (Acc1),
the first and rate-limiting enzyme of FA de novo synthesis. Acc1 activity is attenuated
by AMPK/Snf1-dependent phosphorylation, which is required to maintain an appropriate
acyl-chain length distribution. Moreover, we find that the transcriptional repressor
Opi1 preferentially binds to C16 over C18 phosphatidic acid (PA) species: thus,
C16-chain containing PA sequesters Opi1 more effectively to the ER, enabling AMPK/Snf1
control of PA acyl-chain length to determine the degree of derepression of Opi1
target genes. These findings reveal an unexpected regulatory link between the
major energy-sensing kinase, membrane lipid composition, and transcription.'
article_processing_charge: No
article_type: original
author:
- first_name: Harald F.
full_name: Hofbauer, Harald F.
last_name: Hofbauer
- first_name: Florian H.
full_name: Schopf, Florian H.
last_name: Schopf
- first_name: Hannes
full_name: Schleifer, Hannes
last_name: Schleifer
- first_name: Oskar L.
full_name: Knittelfelder, Oskar L.
last_name: Knittelfelder
- first_name: Bartholomäus
full_name: Pieber, Bartholomäus
id: 93e5e5b2-0da6-11ed-8a41-af589a024726
last_name: Pieber
orcid: 0000-0001-8689-388X
- first_name: Gerald N.
full_name: Rechberger, Gerald N.
last_name: Rechberger
- first_name: Heimo
full_name: Wolinski, Heimo
last_name: Wolinski
- first_name: Maria L.
full_name: Gaspar, Maria L.
last_name: Gaspar
- first_name: C. Oliver
full_name: Kappe, C. Oliver
last_name: Kappe
- first_name: Johannes
full_name: Stadlmann, Johannes
last_name: Stadlmann
- first_name: Karl
full_name: Mechtler, Karl
last_name: Mechtler
- first_name: Alexandra
full_name: Zenz, Alexandra
last_name: Zenz
- first_name: Karl
full_name: Lohner, Karl
last_name: Lohner
- first_name: Oksana
full_name: Tehlivets, Oksana
last_name: Tehlivets
- first_name: Susan A.
full_name: Henry, Susan A.
last_name: Henry
- first_name: Sepp D.
full_name: Kohlwein, Sepp D.
last_name: Kohlwein
citation:
ama: Hofbauer HF, Schopf FH, Schleifer H, et al. Regulation of gene expression through
a transcriptional repressor that senses acyl-chain length in membrane phospholipids.
Developmental Cell. 2014;29(6):P729-739. doi:10.1016/j.devcel.2014.04.025
apa: Hofbauer, H. F., Schopf, F. H., Schleifer, H., Knittelfelder, O. L., Pieber,
B., Rechberger, G. N., … Kohlwein, S. D. (2014). Regulation of gene expression
through a transcriptional repressor that senses acyl-chain length in membrane
phospholipids. Developmental Cell. Elsevier. https://doi.org/10.1016/j.devcel.2014.04.025
chicago: Hofbauer, Harald F., Florian H. Schopf, Hannes Schleifer, Oskar L. Knittelfelder,
Bartholomäus Pieber, Gerald N. Rechberger, Heimo Wolinski, et al. “Regulation
of Gene Expression through a Transcriptional Repressor That Senses Acyl-Chain
Length in Membrane Phospholipids.” Developmental Cell. Elsevier, 2014.
https://doi.org/10.1016/j.devcel.2014.04.025.
ieee: H. F. Hofbauer et al., “Regulation of gene expression through a transcriptional
repressor that senses acyl-chain length in membrane phospholipids,” Developmental
Cell, vol. 29, no. 6. Elsevier, pp. P729-739, 2014.
ista: Hofbauer HF, Schopf FH, Schleifer H, Knittelfelder OL, Pieber B, Rechberger
GN, Wolinski H, Gaspar ML, Kappe CO, Stadlmann J, Mechtler K, Zenz A, Lohner K,
Tehlivets O, Henry SA, Kohlwein SD. 2014. Regulation of gene expression through
a transcriptional repressor that senses acyl-chain length in membrane phospholipids.
Developmental Cell. 29(6), P729-739.
mla: Hofbauer, Harald F., et al. “Regulation of Gene Expression through a Transcriptional
Repressor That Senses Acyl-Chain Length in Membrane Phospholipids.” Developmental
Cell, vol. 29, no. 6, Elsevier, 2014, pp. P729-739, doi:10.1016/j.devcel.2014.04.025.
short: H.F. Hofbauer, F.H. Schopf, H. Schleifer, O.L. Knittelfelder, B. Pieber,
G.N. Rechberger, H. Wolinski, M.L. Gaspar, C.O. Kappe, J. Stadlmann, K. Mechtler,
A. Zenz, K. Lohner, O. Tehlivets, S.A. Henry, S.D. Kohlwein, Developmental Cell
29 (2014) P729-739.
date_created: 2022-08-25T08:42:42Z
date_published: 2014-06-23T00:00:00Z
date_updated: 2023-02-21T10:09:45Z
day: '23'
doi: 10.1016/j.devcel.2014.04.025
extern: '1'
external_id:
pmid:
- '24960695'
intvolume: ' 29'
issue: '6'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1016/j.devcel.2014.04.025
month: '06'
oa: 1
oa_version: Published Version
page: P729-739
pmid: 1
publication: Developmental Cell
publication_identifier:
eissn:
- 1878-1551
issn:
- 1534-5807
publication_status: published
publisher: Elsevier
quality_controlled: '1'
scopus_import: '1'
status: public
title: Regulation of gene expression through a transcriptional repressor that senses
acyl-chain length in membrane phospholipids
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 29
year: '2014'
...
---
_id: '11987'
abstract:
- lang: eng
text: A method for the direct lithiation of terminal alkynes and heterocycles with
subsequent carboxylation in a continuous flow format was developed. This method
provides carboxylic acids at ambient conditions within less than five seconds
with only little excess of the organometallic base and CO2.
article_number: '13430'
article_processing_charge: No
article_type: letter_note
author:
- first_name: Bartholomäus
full_name: Pieber, Bartholomäus
id: 93e5e5b2-0da6-11ed-8a41-af589a024726
last_name: Pieber
orcid: 0000-0001-8689-388X
- first_name: Toma
full_name: Glasnov, Toma
last_name: Glasnov
- first_name: C. O.
full_name: Kappe, C. O.
last_name: Kappe
citation:
ama: 'Pieber B, Glasnov T, Kappe CO. Flash carboxylation: Fast lithiation–carboxylation
sequence at room temperature in continuous flow. RSC Advances. 2014;4(26).
doi:10.1039/c4ra01442a'
apa: 'Pieber, B., Glasnov, T., & Kappe, C. O. (2014). Flash carboxylation: Fast
lithiation–carboxylation sequence at room temperature in continuous flow. RSC
Advances. Royal Society of Chemistry. https://doi.org/10.1039/c4ra01442a'
chicago: 'Pieber, Bartholomäus, Toma Glasnov, and C. O. Kappe. “Flash Carboxylation:
Fast Lithiation–Carboxylation Sequence at Room Temperature in Continuous Flow.”
RSC Advances. Royal Society of Chemistry, 2014. https://doi.org/10.1039/c4ra01442a.'
ieee: 'B. Pieber, T. Glasnov, and C. O. Kappe, “Flash carboxylation: Fast lithiation–carboxylation
sequence at room temperature in continuous flow,” RSC Advances, vol. 4,
no. 26. Royal Society of Chemistry, 2014.'
ista: 'Pieber B, Glasnov T, Kappe CO. 2014. Flash carboxylation: Fast lithiation–carboxylation
sequence at room temperature in continuous flow. RSC Advances. 4(26), 13430.'
mla: 'Pieber, Bartholomäus, et al. “Flash Carboxylation: Fast Lithiation–Carboxylation
Sequence at Room Temperature in Continuous Flow.” RSC Advances, vol. 4,
no. 26, 13430, Royal Society of Chemistry, 2014, doi:10.1039/c4ra01442a.'
short: B. Pieber, T. Glasnov, C.O. Kappe, RSC Advances 4 (2014).
date_created: 2022-08-25T11:48:19Z
date_published: 2014-03-03T00:00:00Z
date_updated: 2023-02-21T10:10:31Z
day: '03'
doi: 10.1039/c4ra01442a
extern: '1'
intvolume: ' 4'
issue: '26'
language:
- iso: eng
month: '03'
oa_version: None
publication: RSC Advances
publication_identifier:
eissn:
- 2046-2069
publication_status: published
publisher: Royal Society of Chemistry
quality_controlled: '1'
scopus_import: '1'
status: public
title: 'Flash carboxylation: Fast lithiation–carboxylation sequence at room temperature
in continuous flow'
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 4
year: '2014'
...
---
_id: '2080'
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. We present an
algorithm to generate designs for spinning objects by optimizing rotational dynamics
properties. As input, the user provides a solid 3D model and a desired axis of
rotation. Our approach then modifies the mass distribution such that the principal
directions of the moment of inertia align with the target rotation frame. We augment
the model by creating voids inside its volume, with interior fill represented
by an adaptive multi-resolution vox-elization. The discrete voxel fill values
are optimized using a continuous, nonlinear formulation. Further, we optimize
for rotational stability by maximizing the dominant principal moment. We extend
our technique to incorporate deformation and multiple materials for cases where
internal voids alone are insufficient. 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 is supported by the ETH Zurich / Marie Curie COFUND
Postdoctoral Fellowship.
author:
- first_name: Moritz
full_name: Bac̈her, Moritz
last_name: Bac̈Her
- first_name: Emily
full_name: Whiting, Emily
last_name: Whiting
- first_name: Bernd
full_name: Bernd Bickel
id: 49876194-F248-11E8-B48F-1D18A9856A87
last_name: Bickel
orcid: 0000-0001-6511-9385
- first_name: Olga
full_name: Sorkine-Hornung, Olga
last_name: Sorkine Hornung
citation:
ama: 'Bac̈Her M, Whiting E, Bickel B, Sorkine Hornung O. Spin-It: Optimizing moment
of inertia for spinnable objects. In: Vol 33. ACM; 2014. doi:10.1145/2601097.2601157'
apa: 'Bac̈Her, M., Whiting, E., Bickel, B., & Sorkine Hornung, O. (2014). Spin-It:
Optimizing moment of inertia for spinnable objects (Vol. 33). Presented at the
SIGGRAPH: 41st International Conference and Exhibition on Computer Graphics and
Interactive Techniques, ACM. https://doi.org/10.1145/2601097.2601157'
chicago: 'Bac̈Her, Moritz, Emily Whiting, Bernd Bickel, and Olga Sorkine Hornung.
“Spin-It: Optimizing Moment of Inertia for Spinnable Objects,” Vol. 33. ACM, 2014.
https://doi.org/10.1145/2601097.2601157.'
ieee: 'M. Bac̈Her, E. Whiting, B. Bickel, and O. Sorkine Hornung, “Spin-It: Optimizing
moment of inertia for spinnable objects,” presented at the SIGGRAPH: 41st International
Conference and Exhibition on Computer Graphics and Interactive Techniques, 2014,
vol. 33, no. 4.'
ista: 'Bac̈Her M, Whiting E, Bickel B, Sorkine Hornung O. 2014. Spin-It: Optimizing
moment of inertia for spinnable objects. SIGGRAPH: 41st International Conference
and Exhibition on Computer Graphics and Interactive Techniques vol. 33.'
mla: 'Bac̈Her, Moritz, et al. Spin-It: Optimizing Moment of Inertia for Spinnable
Objects. Vol. 33, no. 4, ACM, 2014, doi:10.1145/2601097.2601157.'
short: M. Bac̈Her, E. Whiting, B. Bickel, O. Sorkine Hornung, in:, ACM, 2014.
conference:
name: 'SIGGRAPH: 41st International Conference and Exhibition on Computer Graphics
and Interactive Techniques'
date_created: 2018-12-11T11:55:35Z
date_published: 2014-01-01T00:00:00Z
date_updated: 2019-04-26T07:22:07Z
day: '01'
doi: 10.1145/2601097.2601157
extern: 1
intvolume: ' 33'
issue: '4'
month: '01'
publication_status: published
publisher: ACM
publist_id: '4958'
quality_controlled: 0
status: public
title: 'Spin-It: Optimizing moment of inertia for spinnable objects'
type: conference
volume: 33
year: '2014'
...
---
_id: '2081'
abstract:
- lang: eng
text: We propose an interactive, optimization-in-the-loop tool for designing inflatable
structures. Given a target shape, the user draws a network of seams defining desired
segment boundaries in 3D. Our method computes optimally-shaped flat panels for
the segments, such that the inflated structure is as close as possible to the
target while satisfying the desired seam positions. Our approach is underpinned
by physics-based pattern optimization, accurate coarse-scale simulation using
tension field theory, and a specialized constraint-optimization method. Our system
is fast enough to warrant interactive exploration of different seam layouts, including
internal connections, and their effects on the inflated shape. We demonstrate
the resulting design process on a varied set of simulation examples, some of which
we have fabricated, demonstrating excellent agreement with the design intent.
acknowledgement: This work was partly funded by the NCCR Co-Me of the Swiss NSF.
article_number: '63'
author:
- first_name: Mélina
full_name: Skouras, Mélina
last_name: Skouras
- first_name: Bernhard
full_name: Thomaszewski, Bernhard
last_name: Thomaszewski
- first_name: Peter
full_name: Kaufmann, Peter
last_name: Kaufmann
- first_name: Akash
full_name: Garg, Akash
last_name: Garg
- first_name: Bernd
full_name: Bickel, Bernd
id: 49876194-F248-11E8-B48F-1D18A9856A87
last_name: Bickel
orcid: 0000-0001-6511-9385
- first_name: Eitan
full_name: Grinspun, Eitan
last_name: Grinspun
- first_name: Markus
full_name: Gross, Markus
last_name: Gross
citation:
ama: 'Skouras M, Thomaszewski B, Kaufmann P, et al. Designing inflatable structures.
In: Vol 33. ACM; 2014. doi:10.1145/2601097.2601166'
apa: 'Skouras, M., Thomaszewski, B., Kaufmann, P., Garg, A., Bickel, B., Grinspun,
E., & Gross, M. (2014). Designing inflatable structures (Vol. 33). Presented
at the SIGGRAPH: Special Interest Group on Computer Graphics and Interactive Techniques,
ACM. https://doi.org/10.1145/2601097.2601166'
chicago: Skouras, Mélina, Bernhard Thomaszewski, Peter Kaufmann, Akash Garg, Bernd
Bickel, Eitan Grinspun, and Markus Gross. “Designing Inflatable Structures,” Vol.
33. ACM, 2014. https://doi.org/10.1145/2601097.2601166.
ieee: 'M. Skouras et al., “Designing inflatable structures,” presented at
the SIGGRAPH: Special Interest Group on Computer Graphics and Interactive Techniques,
2014, vol. 33, no. 4.'
ista: 'Skouras M, Thomaszewski B, Kaufmann P, Garg A, Bickel B, Grinspun E, Gross
M. 2014. Designing inflatable structures. SIGGRAPH: Special Interest Group on
Computer Graphics and Interactive Techniques vol. 33, 63.'
mla: Skouras, Mélina, et al. Designing Inflatable Structures. Vol. 33, no.
4, 63, ACM, 2014, doi:10.1145/2601097.2601166.
short: M. Skouras, B. Thomaszewski, P. Kaufmann, A. Garg, B. Bickel, E. Grinspun,
M. Gross, in:, ACM, 2014.
conference:
name: 'SIGGRAPH: Special Interest Group on Computer Graphics and Interactive Techniques'
date_created: 2018-12-11T11:55:36Z
date_published: 2014-07-01T00:00:00Z
date_updated: 2021-01-12T06:55:11Z
day: '01'
doi: 10.1145/2601097.2601166
extern: '1'
intvolume: ' 33'
issue: '4'
language:
- iso: eng
month: '07'
oa_version: None
publication_status: published
publisher: ACM
publist_id: '4957'
status: public
title: Designing inflatable structures
type: conference
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 33
year: '2014'
...
---
_id: '2082'
abstract:
- lang: eng
text: 'NMAC is a mode of operation which turns a fixed input-length keyed hash function
f into a variable input-length function. A practical single-key variant of NMAC
called HMAC is a very popular and widely deployed message authentication code
(MAC). Security proofs and attacks for NMAC can typically be lifted to HMAC. NMAC
was introduced by Bellare, Canetti and Krawczyk [Crypto''96], who proved it to
be a secure pseudorandom function (PRF), and thus also a MAC, assuming that (1)
f is a PRF and (2) the function we get when cascading f is weakly collision-resistant.
Unfortunately, HMAC is typically instantiated with cryptographic hash functions
like MD5 or SHA-1 for which (2) has been found to be wrong. To restore the provable
guarantees for NMAC, Bellare [Crypto''06] showed its security based solely on
the assumption that f is a PRF, albeit via a non-uniform reduction. - Our first
contribution is a simpler and uniform proof for this fact: If f is an ε-secure
PRF (against q queries) and a δ-non-adaptively secure PRF (against q queries),
then NMAC f is an (ε+ℓqδ)-secure PRF against q queries of length at most ℓ blocks
each. - We then show that this ε+ℓqδ bound is basically tight. For the most interesting
case where ℓqδ ≥ ε we prove this by constructing an f for which an attack with
advantage ℓqδ exists. This also violates the bound O(ℓε) on the PRF-security of
NMAC recently claimed by Koblitz and Menezes. - Finally, we analyze the PRF-security
of a modification of NMAC called NI [An and Bellare, Crypto''99] that differs
mainly by using a compression function with an additional keying input. This avoids
the constant rekeying on multi-block messages in NMAC and allows for a security
proof starting by the standard switch from a PRF to a random function, followed
by an information-theoretic analysis. We carry out such an analysis, obtaining
a tight ℓq2/2 c bound for this step, improving over the trivial bound of ℓ2q2/2c.
The proof borrows combinatorial techniques originally developed for proving the
security of CBC-MAC [Bellare et al., Crypto''05].'
alternative_title:
- LNCS
author:
- first_name: Peter
full_name: Gazi, Peter
id: 3E0BFE38-F248-11E8-B48F-1D18A9856A87
last_name: Gazi
- 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: Michal
full_name: Rybar, Michal
id: 2B3E3DE8-F248-11E8-B48F-1D18A9856A87
last_name: Rybar
citation:
ama: 'Gazi P, Pietrzak KZ, Rybar M. The exact PRF-security of NMAC and HMAC. In:
Garay J, Gennaro R, eds. Vol 8616. Springer; 2014:113-130. doi:10.1007/978-3-662-44371-2_7'
apa: 'Gazi, P., Pietrzak, K. Z., & Rybar, M. (2014). The exact PRF-security
of NMAC and HMAC. In J. Garay & R. Gennaro (Eds.) (Vol. 8616, pp. 113–130).
Presented at the CRYPTO: International Cryptology Conference, Santa Barbara, USA:
Springer. https://doi.org/10.1007/978-3-662-44371-2_7'
chicago: Gazi, Peter, Krzysztof Z Pietrzak, and Michal Rybar. “The Exact PRF-Security
of NMAC and HMAC.” edited by Juan Garay and Rosario Gennaro, 8616:113–30. Springer,
2014. https://doi.org/10.1007/978-3-662-44371-2_7.
ieee: 'P. Gazi, K. Z. Pietrzak, and M. Rybar, “The exact PRF-security of NMAC and
HMAC,” presented at the CRYPTO: International Cryptology Conference, Santa Barbara,
USA, 2014, vol. 8616, no. 1, pp. 113–130.'
ista: 'Gazi P, Pietrzak KZ, Rybar M. 2014. The exact PRF-security of NMAC and HMAC.
CRYPTO: International Cryptology Conference, LNCS, vol. 8616, 113–130.'
mla: Gazi, Peter, et al. The Exact PRF-Security of NMAC and HMAC. Edited
by Juan Garay and Rosario Gennaro, vol. 8616, no. 1, Springer, 2014, pp. 113–30,
doi:10.1007/978-3-662-44371-2_7.
short: P. Gazi, K.Z. Pietrzak, M. Rybar, in:, J. Garay, R. Gennaro (Eds.), Springer,
2014, pp. 113–130.
conference:
end_date: 2014-08-21
location: Santa Barbara, USA
name: 'CRYPTO: International Cryptology Conference'
start_date: 2014-08-17
date_created: 2018-12-11T11:55:36Z
date_published: 2014-01-01T00:00:00Z
date_updated: 2023-09-07T12:02:27Z
day: '01'
ddc:
- '000'
- '004'
department:
- _id: KrPi
doi: 10.1007/978-3-662-44371-2_7
ec_funded: 1
editor:
- first_name: Juan
full_name: Garay, Juan
last_name: Garay
- first_name: Rosario
full_name: Gennaro, Rosario
last_name: Gennaro
file:
- access_level: open_access
checksum: dab6ab36a5f6af94f2b597e6404ed11d
content_type: application/pdf
creator: system
date_created: 2018-12-12T10:13:17Z
date_updated: 2020-07-14T12:45:28Z
file_id: '4999'
file_name: IST-2016-682-v1+1_578.pdf
file_size: 492310
relation: main_file
file_date_updated: 2020-07-14T12:45:28Z
has_accepted_license: '1'
intvolume: ' 8616'
issue: '1'
language:
- iso: eng
month: '01'
oa: 1
oa_version: Submitted Version
page: 113 - 130
project:
- _id: 258C570E-B435-11E9-9278-68D0E5697425
call_identifier: FP7
grant_number: '259668'
name: Provable Security for Physical Cryptography
publication_status: published
publisher: Springer
publist_id: '4955'
pubrep_id: '682'
quality_controlled: '1'
related_material:
record:
- id: '838'
relation: dissertation_contains
status: public
status: public
title: The exact PRF-security of NMAC and HMAC
type: conference
user_id: 4435EBFC-F248-11E8-B48F-1D18A9856A87
volume: 8616
year: '2014'
...
---
_id: '2083'
abstract:
- lang: eng
text: Understanding the effects of sex and migration on adaptation to novel environments
remains a key problem in evolutionary biology. Using a single-cell alga Chlamydomonas
reinhardtii, we investigated how sex and migration affected rates of evolutionary
rescue in a sink environment, and subsequent changes in fitness following evolutionary
rescue. We show that sex and migration affect both the rate of evolutionary rescue
and subsequent adaptation. However, their combined effects change as the populations
adapt to a sink habitat. Both sex and migration independently increased rates
of evolutionary rescue, but the effect of sex on subsequent fitness improvements,
following initial rescue, changed with migration, as sex was beneficial in the
absence of migration but constraining adaptation when combined with migration.
These results suggest that sex and migration are beneficial during the initial
stages of adaptation, but can become detrimental as the population adapts to its
environment.
acknowledgement: The authors are grateful to the Leverhulme Trust (F/00 215/AW) for
funding this work.
article_processing_charge: No
article_type: original
author:
- first_name: Mato
full_name: Lagator, Mato
id: 345D25EC-F248-11E8-B48F-1D18A9856A87
last_name: Lagator
- first_name: Andrew
full_name: Morgan, Andrew
last_name: Morgan
- first_name: Paul
full_name: Neve, Paul
last_name: Neve
- first_name: Nick
full_name: Colegrave, Nick
last_name: Colegrave
citation:
ama: Lagator M, Morgan A, Neve P, Colegrave N. Role of sex and migration in adaptation
to sink environments. Evolution. 2014;68(8):2296-2305. doi:10.1111/evo.12440
apa: Lagator, M., Morgan, A., Neve, P., & Colegrave, N. (2014). Role of sex
and migration in adaptation to sink environments. Evolution. Wiley. https://doi.org/10.1111/evo.12440
chicago: Lagator, Mato, Andrew Morgan, Paul Neve, and Nick Colegrave. “Role of Sex
and Migration in Adaptation to Sink Environments.” Evolution. Wiley, 2014.
https://doi.org/10.1111/evo.12440.
ieee: M. Lagator, A. Morgan, P. Neve, and N. Colegrave, “Role of sex and migration
in adaptation to sink environments,” Evolution, vol. 68, no. 8. Wiley,
pp. 2296–2305, 2014.
ista: Lagator M, Morgan A, Neve P, Colegrave N. 2014. Role of sex and migration
in adaptation to sink environments. Evolution. 68(8), 2296–2305.
mla: Lagator, Mato, et al. “Role of Sex and Migration in Adaptation to Sink Environments.”
Evolution, vol. 68, no. 8, Wiley, 2014, pp. 2296–305, doi:10.1111/evo.12440.
short: M. Lagator, A. Morgan, P. Neve, N. Colegrave, Evolution 68 (2014) 2296–2305.
date_created: 2018-12-11T11:55:36Z
date_published: 2014-04-25T00:00:00Z
date_updated: 2023-02-23T14:06:51Z
day: '25'
ddc:
- '570'
department:
- _id: CaGu
doi: 10.1111/evo.12440
file:
- access_level: open_access
checksum: 8d459b07e4a11bb5fde92d969184fe48
content_type: application/pdf
creator: dernst
date_created: 2020-05-14T16:40:31Z
date_updated: 2020-07-14T12:45:28Z
file_id: '7845'
file_name: 2014_Evolution_Lagator.pdf
file_size: 467254
relation: main_file
file_date_updated: 2020-07-14T12:45:28Z
has_accepted_license: '1'
intvolume: ' 68'
issue: '8'
language:
- iso: eng
month: '04'
oa: 1
oa_version: Published Version
page: 2296 - 2305
publication: Evolution
publication_status: published
publisher: Wiley
publist_id: '4954'
quality_controlled: '1'
related_material:
record:
- id: '9747'
relation: research_data
status: public
scopus_import: 1
status: public
title: Role of sex and migration in adaptation to sink environments
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 68
year: '2014'
...
---
_id: '2084'
abstract:
- lang: eng
text: Receptor tyrosine kinases (RTKs) are a large family of cell surface receptors
that sense growth factors and hormones and regulate a variety of cell behaviours
in health and disease. Contactless activation of RTKs with spatial and temporal
precision is currently not feasible. Here, we generated RTKs that are insensitive
to endogenous ligands but can be selectively activated by low-intensity blue light.
We screened light-oxygen-voltage (LOV)-sensing domains for their ability to activate
RTKs by light-activated dimerization. Incorporation of LOV domains found in aureochrome
photoreceptors of stramenopiles resulted in robust activation of the fibroblast
growth factor receptor 1 (FGFR1), epidermal growth factor receptor (EGFR) and
rearranged during transfection (RET). In human cancer and endothelial cells, light
induced cellular signalling with spatial and temporal precision. Furthermore,
light faithfully mimicked complex mitogenic and morphogenic cell behaviour induced
by growth factors. RTKs under optical control (Opto-RTKs) provide a powerful optogenetic
approach to actuate cellular signals and manipulate cell behaviour.
acknowledgement: European Union Seventh Framework Programme; Human Frontier Science
Program; Oesterreichische Nationalbank Anniversary Fund 14211; Austrian Research
Promotion Agency; FemTech
author:
- first_name: Michael
full_name: Grusch, Michael
last_name: Grusch
- first_name: Karin
full_name: Schelch, Karin
last_name: Schelch
- first_name: Robert
full_name: Riedler, Robert
last_name: Riedler
- first_name: Eva
full_name: Gschaider-Reichhart, Eva
id: 3FEE232A-F248-11E8-B48F-1D18A9856A87
last_name: Gschaider-Reichhart
orcid: 0000-0002-7218-7738
- first_name: Christopher
full_name: Differ, Christopher
last_name: Differ
- first_name: Walter
full_name: Berger, Walter
last_name: Berger
- first_name: Álvaro
full_name: Inglés Prieto, Álvaro
id: 2A9DB292-F248-11E8-B48F-1D18A9856A87
last_name: Inglés Prieto
orcid: 0000-0002-5409-8571
- first_name: Harald L
full_name: Janovjak, Harald L
id: 33BA6C30-F248-11E8-B48F-1D18A9856A87
last_name: Janovjak
orcid: 0000-0002-8023-9315
citation:
ama: Grusch M, Schelch K, Riedler R, et al. Spatio-temporally precise activation
of engineered receptor tyrosine kinases by light. EMBO Journal. 2014;33(15):1713-1726.
doi:10.15252/embj.201387695
apa: Grusch, M., Schelch, K., Riedler, R., Gschaider-Reichhart, E., Differ, C.,
Berger, W., … Janovjak, H. L. (2014). Spatio-temporally precise activation of
engineered receptor tyrosine kinases by light. EMBO Journal. Wiley-Blackwell.
https://doi.org/10.15252/embj.201387695
chicago: Grusch, Michael, Karin Schelch, Robert Riedler, Eva Gschaider-Reichhart,
Christopher Differ, Walter Berger, Álvaro Inglés Prieto, and Harald L Janovjak.
“Spatio-Temporally Precise Activation of Engineered Receptor Tyrosine Kinases
by Light.” EMBO Journal. Wiley-Blackwell, 2014. https://doi.org/10.15252/embj.201387695.
ieee: M. Grusch et al., “Spatio-temporally precise activation of engineered
receptor tyrosine kinases by light,” EMBO Journal, vol. 33, no. 15. Wiley-Blackwell,
pp. 1713–1726, 2014.
ista: Grusch M, Schelch K, Riedler R, Gschaider-Reichhart E, Differ C, Berger W,
Inglés Prieto Á, Janovjak HL. 2014. Spatio-temporally precise activation of engineered
receptor tyrosine kinases by light. EMBO Journal. 33(15), 1713–1726.
mla: Grusch, Michael, et al. “Spatio-Temporally Precise Activation of Engineered
Receptor Tyrosine Kinases by Light.” EMBO Journal, vol. 33, no. 15, Wiley-Blackwell,
2014, pp. 1713–26, doi:10.15252/embj.201387695.
short: M. Grusch, K. Schelch, R. Riedler, E. Gschaider-Reichhart, C. Differ, W.
Berger, Á. Inglés Prieto, H.L. Janovjak, EMBO Journal 33 (2014) 1713–1726.
date_created: 2018-12-11T11:55:37Z
date_published: 2014-07-01T00:00:00Z
date_updated: 2023-09-07T12:49:09Z
day: '01'
department:
- _id: HaJa
doi: 10.15252/embj.201387695
intvolume: ' 33'
issue: '15'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4194103/
month: '07'
oa: 1
oa_version: Submitted Version
page: 1713 - 1726
publication: EMBO Journal
publication_status: published
publisher: Wiley-Blackwell
publist_id: '4953'
quality_controlled: '1'
related_material:
record:
- id: '418'
relation: dissertation_contains
status: public
scopus_import: 1
status: public
title: Spatio-temporally precise activation of engineered receptor tyrosine kinases
by light
type: journal_article
user_id: 4435EBFC-F248-11E8-B48F-1D18A9856A87
volume: 33
year: '2014'
...
---
_id: '2086'
abstract:
- lang: eng
text: Pathogens may gain a fitness advantage through manipulation of the behaviour
of their hosts. Likewise, host behavioural changes can be a defence mechanism,
counteracting the impact of pathogens on host fitness. We apply harmonic radar
technology to characterize the impact of an emerging pathogen - Nosema ceranae
(Microsporidia) - on honeybee (Apis mellifera) flight and orientation performance
in the field. Honeybees are the most important commercial pollinators. Emerging
diseases have been proposed to play a prominent role in colony decline, partly
through sub-lethal behavioural manipulation of their hosts. We found that homing
success was significantly reduced in diseased (65.8%) versus healthy foragers
(92.5%). Although lost bees had significantly reduced continuous flight times
and prolonged resting times, other flight characteristics and navigational abilities
showed no significant difference between infected and non-infected bees. Our results
suggest that infected bees express normal flight characteristics but are constrained
in their homing ability, potentially compromising the colony by reducing its resource
inputs, but also counteracting the intra-colony spread of infection. We provide
the first high-resolution analysis of sub-lethal effects of an emerging disease
on insect flight behaviour. The potential causes and the implications for both
host and parasite are discussed.
acknowledgement: This study was funded jointly by a grant from BBSRC, Defra, NERC,
the Scottish Government and the Wellcome Trust, under the Insect Pollinators Initiative
(grant numbers BB/I00097/1 and BB/I000100/1). Rothamsted Research is a national
institute of bioscience strategically funded by the UK Biotechnology and Biological
Sciences Research Council (BBSRC).
article_number: e103989
author:
- first_name: Stephan
full_name: Wolf, Stephan
last_name: Wolf
- first_name: Dino
full_name: Mcmahon, Dino
last_name: Mcmahon
- first_name: Ka
full_name: Lim, Ka
last_name: Lim
- first_name: Christopher
full_name: Pull, Christopher
id: 3C7F4840-F248-11E8-B48F-1D18A9856A87
last_name: Pull
orcid: 0000-0003-1122-3982
- first_name: Suzanne
full_name: Clark, Suzanne
last_name: Clark
- first_name: Robert
full_name: Paxton, Robert
last_name: Paxton
- first_name: Juliet
full_name: Osborne, Juliet
last_name: Osborne
citation:
ama: 'Wolf S, Mcmahon D, Lim K, et al. So near and yet so far: Harmonic radar reveals
reduced homing ability of Nosema infected honeybees. PLoS One. 2014;9(8).
doi:10.1371/journal.pone.0103989'
apa: 'Wolf, S., Mcmahon, D., Lim, K., Pull, C., Clark, S., Paxton, R., & Osborne,
J. (2014). So near and yet so far: Harmonic radar reveals reduced homing ability
of Nosema infected honeybees. PLoS One. Public Library of Science. https://doi.org/10.1371/journal.pone.0103989'
chicago: 'Wolf, Stephan, Dino Mcmahon, Ka Lim, Christopher Pull, Suzanne Clark,
Robert Paxton, and Juliet Osborne. “So near and yet so Far: Harmonic Radar Reveals
Reduced Homing Ability of Nosema Infected Honeybees.” PLoS One. Public
Library of Science, 2014. https://doi.org/10.1371/journal.pone.0103989.'
ieee: 'S. Wolf et al., “So near and yet so far: Harmonic radar reveals reduced
homing ability of Nosema infected honeybees,” PLoS One, vol. 9, no. 8.
Public Library of Science, 2014.'
ista: 'Wolf S, Mcmahon D, Lim K, Pull C, Clark S, Paxton R, Osborne J. 2014. So
near and yet so far: Harmonic radar reveals reduced homing ability of Nosema infected
honeybees. PLoS One. 9(8), e103989.'
mla: 'Wolf, Stephan, et al. “So near and yet so Far: Harmonic Radar Reveals Reduced
Homing Ability of Nosema Infected Honeybees.” PLoS One, vol. 9, no. 8,
e103989, Public Library of Science, 2014, doi:10.1371/journal.pone.0103989.'
short: S. Wolf, D. Mcmahon, K. Lim, C. Pull, S. Clark, R. Paxton, J. Osborne, PLoS
One 9 (2014).
date_created: 2018-12-11T11:55:37Z
date_published: 2014-08-06T00:00:00Z
date_updated: 2023-02-23T14:11:56Z
day: '06'
ddc:
- '570'
department:
- _id: SyCr
doi: 10.1371/journal.pone.0103989
file:
- access_level: open_access
checksum: 2fc62c6739eada4bddf026afbae669db
content_type: application/pdf
creator: system
date_created: 2018-12-12T10:13:55Z
date_updated: 2020-07-14T12:45:28Z
file_id: '5042'
file_name: IST-2016-437-v1+1_journal.pone.0103989.pdf
file_size: 1013386
relation: main_file
file_date_updated: 2020-07-14T12:45:28Z
has_accepted_license: '1'
intvolume: ' 9'
issue: '8'
language:
- iso: eng
month: '08'
oa: 1
oa_version: Published Version
publication: PLoS One
publication_status: published
publisher: Public Library of Science
publist_id: '4949'
pubrep_id: '437'
quality_controlled: '1'
related_material:
record:
- id: '9888'
relation: research_data
status: public
scopus_import: 1
status: public
title: 'So near and yet so far: Harmonic radar reveals reduced homing ability of Nosema
infected honeybees'
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: 4435EBFC-F248-11E8-B48F-1D18A9856A87
volume: 9
year: '2014'
...
---
_id: '2115'
abstract:
- lang: eng
text: The facial performance of an individual is inherently rich in subtle deformation
and timing details. Although these subtleties make the performance realistic and
compelling, they often elude both motion capture and hand animation. We present
a technique for adding fine-scale details and expressiveness to low-resolution
art-directed facial performances, such as those created manually using a rig,
via marker-based capture, by fitting a morphable model to a video, or through
Kinect reconstruction using recent faceshift technology. We employ a high-resolution
facial performance capture system to acquire a representative performance of an
individual in which he or she explores the full range of facial expressiveness.
From the captured data, our system extracts an expressiveness model that encodes
subtle spatial and temporal deformation details specific to that particular individual.
Once this model has been built, these details can be transferred to low-resolution
art-directed performances. We demonstrate results on various forms of input; after
our enhancement, the resulting animations exhibit the same nuances and fine spatial
details as the captured performance, with optional temporal enhancement to match
the dynamics of the actor. Finally, we show that our technique outperforms the
current state-of-the-art in example-based facial animation.
author:
- first_name: Amit
full_name: Bermano, Amit H
last_name: Bermano
- first_name: Derek
full_name: Bradley, Derek J
last_name: Bradley
- first_name: Thabo
full_name: Beeler, Thabo
last_name: Beeler
- first_name: Fabio
full_name: Zund, Fabio
last_name: Zund
- first_name: Derek
full_name: Nowrouzezahrai, Derek
last_name: Nowrouzezahrai
- first_name: Ilya
full_name: Baran, Ilya
last_name: Baran
- first_name: Olga
full_name: Sorkine-Hornung, Olga
last_name: Sorkine Hornung
- first_name: Hanspeter
full_name: Pfister, Hanspeter
last_name: Pfister
- first_name: Robert
full_name: Sumner, Robert W
last_name: Sumner
- first_name: Bernd
full_name: Bernd Bickel
id: 49876194-F248-11E8-B48F-1D18A9856A87
last_name: Bickel
orcid: 0000-0001-6511-9385
- first_name: Markus
full_name: Groß, Markus S
last_name: Groß
citation:
ama: Bermano A, Bradley D, Beeler T, et al. Facial performance enhancement using
dynamic shape space analysis. ACM Transactions on Graphics. 2014;33(2).
doi:10.1145/2546276
apa: Bermano, A., Bradley, D., Beeler, T., Zund, F., Nowrouzezahrai, D., Baran,
I., … Groß, M. (2014). Facial performance enhancement using dynamic shape space
analysis. ACM Transactions on Graphics. ACM. https://doi.org/10.1145/2546276
chicago: Bermano, Amit, Derek Bradley, Thabo Beeler, Fabio Zund, Derek Nowrouzezahrai,
Ilya Baran, Olga Sorkine Hornung, et al. “Facial Performance Enhancement Using
Dynamic Shape Space Analysis.” ACM Transactions on Graphics. ACM, 2014.
https://doi.org/10.1145/2546276.
ieee: A. Bermano et al., “Facial performance enhancement using dynamic shape
space analysis,” ACM Transactions on Graphics, vol. 33, no. 2. ACM, 2014.
ista: Bermano A, Bradley D, Beeler T, Zund F, Nowrouzezahrai D, Baran I, Sorkine
Hornung O, Pfister H, Sumner R, Bickel B, Groß M. 2014. Facial performance enhancement
using dynamic shape space analysis. ACM Transactions on Graphics. 33(2).
mla: Bermano, Amit, et al. “Facial Performance Enhancement Using Dynamic Shape Space
Analysis.” ACM Transactions on Graphics, vol. 33, no. 2, ACM, 2014, doi:10.1145/2546276.
short: A. Bermano, D. Bradley, T. Beeler, F. Zund, D. Nowrouzezahrai, I. Baran,
O. Sorkine Hornung, H. Pfister, R. Sumner, B. Bickel, M. Groß, ACM Transactions
on Graphics 33 (2014).
date_created: 2018-12-11T11:55:48Z
date_published: 2014-03-01T00:00:00Z
date_updated: 2021-01-12T06:55:24Z
day: '01'
doi: 10.1145/2546276
extern: 1
intvolume: ' 33'
issue: '2'
month: '03'
publication: ACM Transactions on Graphics
publication_status: published
publisher: ACM
publist_id: '4919'
quality_controlled: 0
status: public
title: Facial performance enhancement using dynamic shape space analysis
type: journal_article
volume: 33
year: '2014'
...
---
_id: '2131'
abstract:
- lang: eng
text: We study approximations to a class of vector-valued equations of Burgers type
driven by a multiplicative space-time white noise. A solution theory for this
class of equations has been developed recently in Probability Theory Related Fields
by Hairer and Weber. The key idea was to use the theory of controlled rough paths
to give definitions of weak/mild solutions and to set up a Picard iteration argument.
In this article the limiting behavior of a rather large class of (spatial) approximations
to these equations is studied. These approximations are shown to converge and
convergence rates are given, but the limit may depend on the particular choice
of approximation. This effect is a spatial analogue to the Itô-Stratonovich correction
in the theory of stochastic ordinary differential equations, where it is well
known that different approximation schemes may converge to different solutions.
acknowledgement: JM is supported by Rubicon grant 680-50-0901 of the Netherlands Organisation
for Scientific Research (NWO). MH is supported by EPSRC grant EP/D071593/1 and by
the Royal Society through a Wolfson Research Merit Award. Both MH and HW are supported
by the Le
author:
- first_name: Martin
full_name: Hairer, Martin M
last_name: Hairer
- first_name: Jan
full_name: Jan Maas
id: 4C5696CE-F248-11E8-B48F-1D18A9856A87
last_name: Maas
orcid: 0000-0002-0845-1338
- first_name: Hendrik
full_name: Weber, Hendrik
last_name: Weber
citation:
ama: Hairer M, Maas J, Weber H. Approximating Rough Stochastic PDEs. Communications
on Pure and Applied Mathematics. 2014;67(5):776-870. doi:10.1002/cpa.21495
apa: Hairer, M., Maas, J., & Weber, H. (2014). Approximating Rough Stochastic
PDEs. Communications on Pure and Applied Mathematics. Wiley-Blackwell.
https://doi.org/10.1002/cpa.21495
chicago: Hairer, Martin, Jan Maas, and Hendrik Weber. “Approximating Rough Stochastic
PDEs.” Communications on Pure and Applied Mathematics. Wiley-Blackwell,
2014. https://doi.org/10.1002/cpa.21495.
ieee: M. Hairer, J. Maas, and H. Weber, “Approximating Rough Stochastic PDEs,” Communications
on Pure and Applied Mathematics, vol. 67, no. 5. Wiley-Blackwell, pp. 776–870,
2014.
ista: Hairer M, Maas J, Weber H. 2014. Approximating Rough Stochastic PDEs. Communications
on Pure and Applied Mathematics. 67(5), 776–870.
mla: Hairer, Martin, et al. “Approximating Rough Stochastic PDEs.” Communications
on Pure and Applied Mathematics, vol. 67, no. 5, Wiley-Blackwell, 2014, pp.
776–870, doi:10.1002/cpa.21495.
short: M. Hairer, J. Maas, H. Weber, Communications on Pure and Applied Mathematics
67 (2014) 776–870.
date_created: 2018-12-11T11:55:53Z
date_published: 2014-05-01T00:00:00Z
date_updated: 2021-01-12T06:55:30Z
day: '01'
doi: 10.1002/cpa.21495
extern: 1
intvolume: ' 67'
issue: '5'
main_file_link:
- open_access: '1'
url: 'http://arxiv.org/abs/1202.3094 '
month: '05'
oa: 1
page: 776 - 870
publication: Communications on Pure and Applied Mathematics
publication_status: published
publisher: Wiley-Blackwell
publist_id: '4902'
quality_controlled: 0
status: public
title: Approximating Rough Stochastic PDEs
type: journal_article
volume: 67
year: '2014'
...
---
_id: '2132'
abstract:
- lang: eng
text: We consider discrete porous medium equations of the form ∂tρt=Δϕ(ρt), where
Δ is the generator of a reversible continuous time Markov chain on a finite set
χ, and ϕ is an increasing function. We show that these equations arise as gradient
flows of certain entropy functionals with respect to suitable non-local transportation
metrics. This may be seen as a discrete analogue of the Wasserstein gradient flow
structure for porous medium equations in ℝn discovered by Otto. We present a one-dimensional
counterexample to geodesic convexity and discuss Gromov-Hausdorff convergence
to the Wasserstein metric.
author:
- first_name: Matthias
full_name: Erbar, Matthias
last_name: Erbar
- first_name: Jan
full_name: Jan Maas
id: 4C5696CE-F248-11E8-B48F-1D18A9856A87
last_name: Maas
orcid: 0000-0002-0845-1338
citation:
ama: Erbar M, Maas J. Gradient flow structures for discrete porous medium equations.
Discrete and Continuous Dynamical Systems- Series A. 2014;34(4):1355-1374.
doi:10.3934/dcds.2014.34.1355
apa: Erbar, M., & Maas, J. (2014). Gradient flow structures for discrete porous
medium equations. Discrete and Continuous Dynamical Systems- Series A.
Southwest Missouri State University. https://doi.org/10.3934/dcds.2014.34.1355
chicago: Erbar, Matthias, and Jan Maas. “Gradient Flow Structures for Discrete Porous
Medium Equations.” Discrete and Continuous Dynamical Systems- Series A.
Southwest Missouri State University, 2014. https://doi.org/10.3934/dcds.2014.34.1355 .
ieee: M. Erbar and J. Maas, “Gradient flow structures for discrete porous medium
equations,” Discrete and Continuous Dynamical Systems- Series A, vol. 34,
no. 4. Southwest Missouri State University, pp. 1355–1374, 2014.
ista: Erbar M, Maas J. 2014. Gradient flow structures for discrete porous medium
equations. Discrete and Continuous Dynamical Systems- Series A. 34(4), 1355–1374.
mla: Erbar, Matthias, and Jan Maas. “Gradient Flow Structures for Discrete Porous
Medium Equations.” Discrete and Continuous Dynamical Systems- Series A,
vol. 34, no. 4, Southwest Missouri State University, 2014, pp. 1355–74, doi:10.3934/dcds.2014.34.1355
.
short: M. Erbar, J. Maas, Discrete and Continuous Dynamical Systems- Series A 34
(2014) 1355–1374.
date_created: 2018-12-11T11:55:54Z
date_published: 2014-04-01T00:00:00Z
date_updated: 2021-01-12T06:55:30Z
day: '01'
doi: '10.3934/dcds.2014.34.1355 '
extern: 1
intvolume: ' 34'
issue: '4'
main_file_link:
- open_access: '1'
url: http://arxiv.org/abs/1212.1129
month: '04'
oa: 1
page: 1355 - 1374
publication: Discrete and Continuous Dynamical Systems- Series A
publication_status: published
publisher: Southwest Missouri State University
publist_id: '4903'
quality_controlled: 0
status: public
title: Gradient flow structures for discrete porous medium equations
type: journal_article
volume: 34
year: '2014'
...
---
_id: '2133'
abstract:
- lang: eng
text: "Let ℭ denote the Clifford algebra over ℝ\U0001D45B, which is the von Neumann
algebra generated by n self-adjoint operators Q j , j = 1,…,n satisfying the canonical
anticommutation relations, Q i Q j + Q j Q i = 2δ ij I, and let τ denote the
normalized trace on ℭ. This algebra arises in quantum mechanics as the algebra
of observables generated by n fermionic degrees of freedom. Let \U0001D513 denote
the set of all positive operators \U0001D70C∈ℭ such that τ(ρ) = 1; these are the
non-commutative analogs of probability densities in the non-commutative probability
space (ℭ,\U0001D70F). The fermionic Fokker–Planck equation is a quantum-mechanical
analog of the classical Fokker–Planck equation with which it has much in common,
such as the same optimal hypercontractivity properties. In this paper we construct
a Riemannian metric on \U0001D513 that we show to be a natural analog of the classical
2-Wasserstein metric, and we show that, in analogy with the classical case, the
fermionic Fokker–Planck equation is gradient flow in this metric for the relative
entropy with respect to the ground state. We derive a number of consequences of
this, such as a sharp Talagrand inequality for this metric, and we prove a number
of results pertaining to this metric. Several open problems are raised."
author:
- first_name: Eric
full_name: Carlen, Eric
last_name: Carlen
- first_name: Jan
full_name: Maas, Jan
id: 4C5696CE-F248-11E8-B48F-1D18A9856A87
last_name: Maas
orcid: 0000-0002-0845-1338
citation:
ama: Carlen E, Maas J. An analog of the 2-Wasserstein metric in non-commutative
probability under which the fermionic Fokker-Planck equation is gradient flow
for the entropy. Communications in Mathematical Physics. 2014;331(3):887-926.
doi:10.1007/s00220-014-2124-8
apa: Carlen, E., & Maas, J. (2014). An analog of the 2-Wasserstein metric in
non-commutative probability under which the fermionic Fokker-Planck equation is
gradient flow for the entropy. Communications in Mathematical Physics.
Springer. https://doi.org/10.1007/s00220-014-2124-8
chicago: Carlen, Eric, and Jan Maas. “An Analog of the 2-Wasserstein Metric in Non-Commutative
Probability under Which the Fermionic Fokker-Planck Equation Is Gradient Flow
for the Entropy.” Communications in Mathematical Physics. Springer, 2014.
https://doi.org/10.1007/s00220-014-2124-8.
ieee: E. Carlen and J. Maas, “An analog of the 2-Wasserstein metric in non-commutative
probability under which the fermionic Fokker-Planck equation is gradient flow
for the entropy,” Communications in Mathematical Physics, vol. 331, no.
3. Springer, pp. 887–926, 2014.
ista: Carlen E, Maas J. 2014. An analog of the 2-Wasserstein metric in non-commutative
probability under which the fermionic Fokker-Planck equation is gradient flow
for the entropy. Communications in Mathematical Physics. 331(3), 887–926.
mla: Carlen, Eric, and Jan Maas. “An Analog of the 2-Wasserstein Metric in Non-Commutative
Probability under Which the Fermionic Fokker-Planck Equation Is Gradient Flow
for the Entropy.” Communications in Mathematical Physics, vol. 331, no.
3, Springer, 2014, pp. 887–926, doi:10.1007/s00220-014-2124-8.
short: E. Carlen, J. Maas, Communications in Mathematical Physics 331 (2014) 887–926.
date_created: 2018-12-11T11:55:54Z
date_published: 2014-11-01T00:00:00Z
date_updated: 2021-01-12T06:55:30Z
day: '01'
doi: 10.1007/s00220-014-2124-8
extern: '1'
intvolume: ' 331'
issue: '3'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: 'http://arxiv.org/abs/1203.5377 '
month: '11'
oa: 1
oa_version: Submitted Version
page: 887 - 926
publication: Communications in Mathematical Physics
publication_status: published
publisher: Springer
publist_id: '4901'
quality_controlled: '1'
status: public
title: An analog of the 2-Wasserstein metric in non-commutative probability under
which the fermionic Fokker-Planck equation is gradient flow for the entropy
type: journal_article
user_id: 4435EBFC-F248-11E8-B48F-1D18A9856A87
volume: 331
year: '2014'
...
---
_id: '2140'
abstract:
- lang: eng
text: We propose a technique for engineering momentum-dependent dissipation in Bose-Einstein
condensates with non-local interactions. The scheme relies on the use of momentum-dependent
dark-states in close analogy to velocity-selective coherent population trapping.
During the short-time dissipative dynamics, the system is driven into a particular
finite-momentum phonon mode, which in real space corresponds to an ordered structure
with non-local density-density correlations. Dissipation-induced ordering can
be observed and studied in present-day experiments using cold atoms with dipole-dipole
or off-resonant Rydberg interactions. Due to its dissipative nature, the ordering
does not require artificial breaking of translational symmetry by an opticallattice
or harmonic trap. This opens up a perspective of direct cooling of quantum gases
into strongly-interacting phases.
acknowledgement: This work was supported by NSF through a grant for the Institute
for Theoretical Atomic, Molecular, and Optical Physics at Harvard University and
Smithsonian Astrophysical Observatory as well as the Harvard Quantum Optics Center.
article_number: '070401'
author:
- first_name: Johannes
full_name: Otterbach, Johannes
last_name: Otterbach
- first_name: Mikhail
full_name: Lemeshko, Mikhail
id: 37CB05FA-F248-11E8-B48F-1D18A9856A87
last_name: Lemeshko
orcid: 0000-0002-6990-7802
citation:
ama: Otterbach J, Lemeshko M. Dissipative preparation of spatial order in Rydberg-dressed
Bose-Einstein condensates. Physical Review Letters. 2014;113(7). doi:10.1103/PhysRevLett.113.070401
apa: Otterbach, J., & Lemeshko, M. (2014). Dissipative preparation of spatial
order in Rydberg-dressed Bose-Einstein condensates. Physical Review Letters.
American Physical Society. https://doi.org/10.1103/PhysRevLett.113.070401
chicago: Otterbach, Johannes, and Mikhail Lemeshko. “Dissipative Preparation of
Spatial Order in Rydberg-Dressed Bose-Einstein Condensates.” Physical Review
Letters. American Physical Society, 2014. https://doi.org/10.1103/PhysRevLett.113.070401.
ieee: J. Otterbach and M. Lemeshko, “Dissipative preparation of spatial order in
Rydberg-dressed Bose-Einstein condensates,” Physical Review Letters, vol.
113, no. 7. American Physical Society, 2014.
ista: Otterbach J, Lemeshko M. 2014. Dissipative preparation of spatial order in
Rydberg-dressed Bose-Einstein condensates. Physical Review Letters. 113(7), 070401.
mla: Otterbach, Johannes, and Mikhail Lemeshko. “Dissipative Preparation of Spatial
Order in Rydberg-Dressed Bose-Einstein Condensates.” Physical Review Letters,
vol. 113, no. 7, 070401, American Physical Society, 2014, doi:10.1103/PhysRevLett.113.070401.
short: J. Otterbach, M. Lemeshko, Physical Review Letters 113 (2014).
date_created: 2018-12-11T11:55:56Z
date_published: 2014-08-11T00:00:00Z
date_updated: 2021-01-12T06:55:33Z
day: '11'
doi: 10.1103/PhysRevLett.113.070401
extern: '1'
intvolume: ' 113'
issue: '7'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: http://arxiv.org/abs/1308.5905
month: '08'
oa: 1
oa_version: Submitted Version
publication: Physical Review Letters
publication_status: published
publisher: American Physical Society
publist_id: '4884'
status: public
title: Dissipative preparation of spatial order in Rydberg-dressed Bose-Einstein condensates
type: journal_article
user_id: 4435EBFC-F248-11E8-B48F-1D18A9856A87
volume: 113
year: '2014'
...