---
_id: '1230'
abstract:
- lang: eng
text: Concolic testing is a promising method for generating test suites for large
programs. However, it suffers from the path-explosion problem and often fails
to find tests that cover difficult-to-reach parts of programs. In contrast, model
checkers based on counterexample-guided abstraction refinement explore programs
exhaustively, while failing to scale on large programs with precision. In this
paper, we present a novel method that iteratively combines concolic testing and
model checking to find a test suite for a given coverage criterion. If concolic
testing fails to cover some test goals, then the model checker refines its program
abstraction to prove more paths infeasible, which reduces the search space for
concolic testing. We have implemented our method on top of the concolictesting
tool Crest and the model checker CpaChecker. We evaluated our tool on a collection
of programs and a category of SvComp benchmarks. In our experiments, we observed
an improvement in branch coverage compared to Crest from 48% to 63% in the best
case, and from 66% to 71% on average.
acknowledgement: "We thank Andrey Kupriyanov for feedback on the manuscript,\r\nand
Michael Tautschnig for help with preparing the experiments. This research was supported
in part by the European Research Council (ERC) under grant 267989 (QUAREM) and by
the Austrian Science Fund (FWF) under grants S11402-N23 (RiSE) and Z211-N23 (Wittgenstein
Award)."
alternative_title:
- LNCS
article_processing_charge: No
arxiv: 1
author:
- first_name: Przemyslaw
full_name: Daca, Przemyslaw
id: 49351290-F248-11E8-B48F-1D18A9856A87
last_name: Daca
- first_name: Ashutosh
full_name: Gupta, Ashutosh
id: 335E5684-F248-11E8-B48F-1D18A9856A87
last_name: Gupta
- first_name: Thomas A
full_name: Henzinger, Thomas A
id: 40876CD8-F248-11E8-B48F-1D18A9856A87
last_name: Henzinger
orcid: 0000−0002−2985−7724
citation:
ama: 'Daca P, Gupta A, Henzinger TA. Abstraction-driven concolic testing. In: Vol
9583. Springer; 2016:328-347. doi:10.1007/978-3-662-49122-5_16'
apa: 'Daca, P., Gupta, A., & Henzinger, T. A. (2016). Abstraction-driven concolic
testing (Vol. 9583, pp. 328–347). Presented at the VMCAI: Verification, Model
Checking and Abstract Interpretation, St. Petersburg, FL, USA: Springer. https://doi.org/10.1007/978-3-662-49122-5_16'
chicago: Daca, Przemyslaw, Ashutosh Gupta, and Thomas A Henzinger. “Abstraction-Driven
Concolic Testing,” 9583:328–47. Springer, 2016. https://doi.org/10.1007/978-3-662-49122-5_16.
ieee: 'P. Daca, A. Gupta, and T. A. Henzinger, “Abstraction-driven concolic testing,”
presented at the VMCAI: Verification, Model Checking and Abstract Interpretation,
St. Petersburg, FL, USA, 2016, vol. 9583, pp. 328–347.'
ista: 'Daca P, Gupta A, Henzinger TA. 2016. Abstraction-driven concolic testing.
VMCAI: Verification, Model Checking and Abstract Interpretation, LNCS, vol. 9583,
328–347.'
mla: Daca, Przemyslaw, et al. Abstraction-Driven Concolic Testing. Vol. 9583,
Springer, 2016, pp. 328–47, doi:10.1007/978-3-662-49122-5_16.
short: P. Daca, A. Gupta, T.A. Henzinger, in:, Springer, 2016, pp. 328–347.
conference:
end_date: 2016-01-19
location: St. Petersburg, FL, USA
name: 'VMCAI: Verification, Model Checking and Abstract Interpretation'
start_date: 2016-01-17
date_created: 2018-12-11T11:50:50Z
date_published: 2016-01-01T00:00:00Z
date_updated: 2025-09-22T09:23:47Z
day: '01'
department:
- _id: ToHe
doi: 10.1007/978-3-662-49122-5_16
ec_funded: 1
external_id:
arxiv:
- '1511.02615'
isi:
- '000375148800016'
intvolume: ' 9583'
isi: 1
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/abs/1511.02615
month: '01'
oa: 1
oa_version: Preprint
page: 328 - 347
project:
- _id: 25EE3708-B435-11E9-9278-68D0E5697425
call_identifier: FP7
grant_number: '267989'
name: Quantitative Reactive Modeling
- _id: 25F42A32-B435-11E9-9278-68D0E5697425
call_identifier: FWF
grant_number: Z211
name: Formal methods for the design and analysis of complex systems
- _id: 25832EC2-B435-11E9-9278-68D0E5697425
call_identifier: FWF
grant_number: S 11407_N23
name: Rigorous Systems Engineering
publication_status: published
publisher: Springer
publist_id: '6104'
quality_controlled: '1'
related_material:
record:
- id: '1155'
relation: dissertation_contains
status: public
scopus_import: '1'
status: public
title: Abstraction-driven concolic testing
type: conference
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 9583
year: '2016'
...
---
_id: '1231'
abstract:
- lang: eng
text: 'We study the time-and memory-complexities of the problem of computing labels
of (multiple) randomly selected challenge-nodes in a directed acyclic graph. The
w-bit label of a node is the hash of the labels of its parents, and the hash function
is modeled as a random oracle. Specific instances of this problem underlie both
proofs of space [Dziembowski et al. CRYPTO’15] as well as popular memory-hard
functions like scrypt. As our main tool, we introduce the new notion of a probabilistic
parallel entangled pebbling game, a new type of combinatorial pebbling game on
a graph, which is closely related to the labeling game on the same graph. As a
first application of our framework, we prove that for scrypt, when the underlying
hash function is invoked n times, the cumulative memory complexity (CMC) (a notion
recently introduced by Alwen and Serbinenko (STOC’15) to capture amortized memory-hardness
for parallel adversaries) is at least Ω(w · (n/ log(n))2). This bound holds for
adversaries that can store many natural functions of the labels (e.g., linear
combinations), but still not arbitrary functions thereof. We then introduce and
study a combinatorial quantity, and show how a sufficiently small upper bound
on it (which we conjecture) extends our CMC bound for scrypt to hold against arbitrary
adversaries. We also show that such an upper bound solves the main open problem
for proofs-of-space protocols: namely, establishing that the time complexity of
computing the label of a random node in a graph on n nodes (given an initial kw-bit
state) reduces tightly to the time complexity for black pebbling on the same graph
(given an initial k-node pebbling).'
acknowledgement: "Joël Alwen, Chethan Kamath, and Krzysztof Pietrzak’s research is
partially supported by an ERC starting grant (259668-PSPC). Vladimir Kolmogorov
is partially supported by an ERC consolidator grant (616160-DOICV). Binyi Chen was
partially supported by NSF grants CNS-1423566 and CNS-1514526, and a gift from the
Gareatis Foundation. Stefano Tessaro was partially supported by NSF grants CNS-1423566,
CNS-1528178, a Hellman Fellowship, and the Glen and Susanne Culler Chair.\r\n\r\nThis
work was done in part while the authors were visiting the Simons Institute for the
Theory of Computing, supported by the Simons Foundation and by the DIMACS/Simons
Collaboration in Cryptography through NSF grant CNS-1523467."
alternative_title:
- LNCS
article_processing_charge: No
author:
- first_name: Joel F
full_name: Alwen, Joel F
id: 2A8DFA8C-F248-11E8-B48F-1D18A9856A87
last_name: Alwen
- first_name: Binyi
full_name: Chen, Binyi
last_name: Chen
- first_name: Chethan
full_name: Kamath Hosdurg, Chethan
id: 4BD3F30E-F248-11E8-B48F-1D18A9856A87
last_name: Kamath Hosdurg
- first_name: Vladimir
full_name: Kolmogorov, Vladimir
id: 3D50B0BA-F248-11E8-B48F-1D18A9856A87
last_name: Kolmogorov
- 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: Stefano
full_name: Tessaro, Stefano
last_name: Tessaro
citation:
ama: 'Alwen JF, Chen B, Kamath Hosdurg C, Kolmogorov V, Pietrzak KZ, Tessaro S.
On the complexity of scrypt and proofs of space in the parallel random oracle
model. In: Vol 9666. Springer; 2016:358-387. doi:10.1007/978-3-662-49896-5_13'
apa: 'Alwen, J. F., Chen, B., Kamath Hosdurg, C., Kolmogorov, V., Pietrzak, K. Z.,
& Tessaro, S. (2016). On the complexity of scrypt and proofs of space in the
parallel random oracle model (Vol. 9666, pp. 358–387). Presented at the EUROCRYPT:
Theory and Applications of Cryptographic Techniques, Vienna, Austria: Springer.
https://doi.org/10.1007/978-3-662-49896-5_13'
chicago: Alwen, Joel F, Binyi Chen, Chethan Kamath Hosdurg, Vladimir Kolmogorov,
Krzysztof Z Pietrzak, and Stefano Tessaro. “On the Complexity of Scrypt and Proofs
of Space in the Parallel Random Oracle Model,” 9666:358–87. Springer, 2016. https://doi.org/10.1007/978-3-662-49896-5_13.
ieee: 'J. F. Alwen, B. Chen, C. Kamath Hosdurg, V. Kolmogorov, K. Z. Pietrzak, and
S. Tessaro, “On the complexity of scrypt and proofs of space in the parallel random
oracle model,” presented at the EUROCRYPT: Theory and Applications of Cryptographic
Techniques, Vienna, Austria, 2016, vol. 9666, pp. 358–387.'
ista: 'Alwen JF, Chen B, Kamath Hosdurg C, Kolmogorov V, Pietrzak KZ, Tessaro S.
2016. On the complexity of scrypt and proofs of space in the parallel random oracle
model. EUROCRYPT: Theory and Applications of Cryptographic Techniques, LNCS, vol.
9666, 358–387.'
mla: Alwen, Joel F., et al. On the Complexity of Scrypt and Proofs of Space in
the Parallel Random Oracle Model. Vol. 9666, Springer, 2016, pp. 358–87, doi:10.1007/978-3-662-49896-5_13.
short: J.F. Alwen, B. Chen, C. Kamath Hosdurg, V. Kolmogorov, K.Z. Pietrzak, S.
Tessaro, in:, Springer, 2016, pp. 358–387.
conference:
end_date: 2016-05-12
location: Vienna, Austria
name: 'EUROCRYPT: Theory and Applications of Cryptographic Techniques'
start_date: 2016-05-08
date_created: 2018-12-11T11:50:51Z
date_published: 2016-04-28T00:00:00Z
date_updated: 2025-09-22T09:22:54Z
day: '28'
department:
- _id: KrPi
- _id: VlKo
doi: 10.1007/978-3-662-49896-5_13
ec_funded: 1
external_id:
isi:
- '000389727200013'
intvolume: ' 9666'
isi: 1
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://eprint.iacr.org/2016/100
month: '04'
oa: 1
oa_version: Submitted Version
page: 358 - 387
project:
- _id: 258C570E-B435-11E9-9278-68D0E5697425
call_identifier: FP7
grant_number: '259668'
name: Provable Security for Physical Cryptography
- _id: 25FBA906-B435-11E9-9278-68D0E5697425
call_identifier: FP7
grant_number: '616160'
name: 'Discrete Optimization in Computer Vision: Theory and Practice'
publication_status: published
publisher: Springer
publist_id: '6103'
quality_controlled: '1'
scopus_import: '1'
status: public
title: On the complexity of scrypt and proofs of space in the parallel random oracle
model
type: conference
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 9666
year: '2016'
...
---
_id: '1232'
abstract:
- lang: eng
text: Mitochondrial electron transport chain complexes are organized into supercomplexes
responsible for carrying out cellular respiration. Here we present three architectures
of mammalian (ovine) supercomplexes determined by cryo-electron microscopy. We
identify two distinct arrangements of supercomplex CICIII 2 CIV (the respirasome)
- a major 'tight' form and a minor 'loose' form (resolved at the resolution of
5.8 Å and 6.7 Å, respectively), which may represent different stages in supercomplex
assembly or disassembly. We have also determined an architecture of supercomplex
CICIII 2 at 7.8 Å resolution. All observed density can be attributed to the known
80 subunits of the individual complexes, including 132 transmembrane helices.
The individual complexes form tight interactions that vary between the architectures,
with complex IV subunit COX7a switching contact from complex III to complex I.
The arrangement of active sites within the supercomplex may help control reactive
oxygen species production. To our knowledge, these are the first complete architectures
of the dominant, physiologically relevant state of the electron transport chain.
acknowledgement: We thank the MRC LMB Cambridge for the use of the Titan Krios microscope.
Data processing was performed using the IST high-performance computer cluster. J.A.L.
holds a long-term fellowship from FEBS. K.F. is partially funded by a MRC UK PhD
fellowship.
article_processing_charge: No
author:
- first_name: James A
full_name: Letts, James A
id: 322DA418-F248-11E8-B48F-1D18A9856A87
last_name: Letts
orcid: 0000-0002-9864-3586
- first_name: Karol
full_name: Fiedorczuk, Karol
id: 5BFF67CE-02D1-11E9-B11A-A5A4D7DFFFD0
last_name: Fiedorczuk
- first_name: Leonid A
full_name: Sazanov, Leonid A
id: 338D39FE-F248-11E8-B48F-1D18A9856A87
last_name: Sazanov
orcid: 0000-0002-0977-7989
citation:
ama: Letts JA, Fiedorczuk K, Sazanov LA. The architecture of respiratory supercomplexes.
Nature. 2016;537(7622):644-648. doi:10.1038/nature19774
apa: Letts, J. A., Fiedorczuk, K., & Sazanov, L. A. (2016). The architecture
of respiratory supercomplexes. Nature. Nature Publishing Group. https://doi.org/10.1038/nature19774
chicago: Letts, James A, Karol Fiedorczuk, and Leonid A Sazanov. “The Architecture
of Respiratory Supercomplexes.” Nature. Nature Publishing Group, 2016.
https://doi.org/10.1038/nature19774.
ieee: J. A. Letts, K. Fiedorczuk, and L. A. Sazanov, “The architecture of respiratory
supercomplexes,” Nature, vol. 537, no. 7622. Nature Publishing Group, pp.
644–648, 2016.
ista: Letts JA, Fiedorczuk K, Sazanov LA. 2016. The architecture of respiratory
supercomplexes. Nature. 537(7622), 644–648.
mla: Letts, James A., et al. “The Architecture of Respiratory Supercomplexes.” Nature,
vol. 537, no. 7622, Nature Publishing Group, 2016, pp. 644–48, doi:10.1038/nature19774.
short: J.A. Letts, K. Fiedorczuk, L.A. Sazanov, Nature 537 (2016) 644–648.
date_created: 2018-12-11T11:50:51Z
date_published: 2016-09-29T00:00:00Z
date_updated: 2025-09-22T09:22:23Z
day: '29'
department:
- _id: LeSa
doi: 10.1038/nature19774
external_id:
isi:
- '000384331700042'
intvolume: ' 537'
isi: 1
issue: '7622'
language:
- iso: eng
month: '09'
oa_version: None
page: 644 - 648
project:
- _id: 2593EBD6-B435-11E9-9278-68D0E5697425
name: Atomic-Resolution Structures of Mitochondrial Respiratory Chain Supercomplexes
publication: Nature
publication_status: published
publisher: Nature Publishing Group
publist_id: '6102'
quality_controlled: '1'
scopus_import: '1'
status: public
title: The architecture of respiratory supercomplexes
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 537
year: '2016'
...
---
_id: '1233'
abstract:
- lang: eng
text: About three decades ago it was realized that implementing private channels
between parties which can be adaptively corrupted requires an encryption scheme
that is secure against selective opening attacks. Whether standard (IND-CPA) security
implies security against selective opening attacks has been a major open question
since. The only known reduction from selective opening to IND-CPA security loses
an exponential factor. A polynomial reduction is only known for the very special
case where the distribution considered in the selective opening security experiment
is a product distribution, i.e., the messages are sampled independently from each
other. In this paper we give a reduction whose loss is quantified via the dependence
graph (where message dependencies correspond to edges) of the underlying message
distribution. In particular, for some concrete distributions including Markov
distributions, our reduction is polynomial.
acknowledgement: G. Fuchsbauer and K. Pietrzak are supported by the European Research
Council, ERC Starting Grant (259668-PSPC). F. Heuer is funded by a Sofja Kovalevskaja
Award of the Alexander von Humboldt Foundation and DFG SPP 1736, Algorithms for
BIG DATA. E. Kiltz is supported by a Sofja Kovalevskaja Award of the Alexander von
Humboldt Foundation, the German Israel Foundation, and ERC Project ERCC (FP7/615074).
alternative_title:
- LNCS
article_processing_charge: No
author:
- first_name: Georg
full_name: Fuchsbauer, Georg
id: 46B4C3EE-F248-11E8-B48F-1D18A9856A87
last_name: Fuchsbauer
- first_name: Felix
full_name: Heuer, Felix
last_name: Heuer
- first_name: Eike
full_name: Kiltz, Eike
last_name: Kiltz
- first_name: Krzysztof Z
full_name: Pietrzak, Krzysztof Z
id: 3E04A7AA-F248-11E8-B48F-1D18A9856A87
last_name: Pietrzak
orcid: 0000-0002-9139-1654
citation:
ama: 'Fuchsbauer G, Heuer F, Kiltz E, Pietrzak KZ. Standard security does imply
security against selective opening for markov distributions. In: Vol 9562. Springer;
2016:282-305. doi:10.1007/978-3-662-49096-9_12'
apa: 'Fuchsbauer, G., Heuer, F., Kiltz, E., & Pietrzak, K. Z. (2016). Standard
security does imply security against selective opening for markov distributions
(Vol. 9562, pp. 282–305). Presented at the TCC: Theory of Cryptography Conference,
Tel Aviv, Israel: Springer. https://doi.org/10.1007/978-3-662-49096-9_12'
chicago: Fuchsbauer, Georg, Felix Heuer, Eike Kiltz, and Krzysztof Z Pietrzak. “Standard
Security Does Imply Security against Selective Opening for Markov Distributions,”
9562:282–305. Springer, 2016. https://doi.org/10.1007/978-3-662-49096-9_12.
ieee: 'G. Fuchsbauer, F. Heuer, E. Kiltz, and K. Z. Pietrzak, “Standard security
does imply security against selective opening for markov distributions,” presented
at the TCC: Theory of Cryptography Conference, Tel Aviv, Israel, 2016, vol. 9562,
pp. 282–305.'
ista: 'Fuchsbauer G, Heuer F, Kiltz E, Pietrzak KZ. 2016. Standard security does
imply security against selective opening for markov distributions. TCC: Theory
of Cryptography Conference, LNCS, vol. 9562, 282–305.'
mla: Fuchsbauer, Georg, et al. Standard Security Does Imply Security against
Selective Opening for Markov Distributions. Vol. 9562, Springer, 2016, pp.
282–305, doi:10.1007/978-3-662-49096-9_12.
short: G. Fuchsbauer, F. Heuer, E. Kiltz, K.Z. Pietrzak, in:, Springer, 2016, pp.
282–305.
conference:
end_date: 2016-01-13
location: Tel Aviv, Israel
name: 'TCC: Theory of Cryptography Conference'
start_date: 2016-01-10
date_created: 2018-12-11T11:50:51Z
date_published: 2016-01-01T00:00:00Z
date_updated: 2025-09-22T09:21:52Z
day: '01'
department:
- _id: KrPi
doi: 10.1007/978-3-662-49096-9_12
ec_funded: 1
external_id:
isi:
- '000376041100012'
intvolume: ' 9562'
isi: 1
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://eprint.iacr.org/2015/853
month: '01'
oa: 1
oa_version: Submitted Version
page: 282 - 305
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: '6100'
quality_controlled: '1'
scopus_import: '1'
status: public
title: Standard security does imply security against selective opening for markov
distributions
type: conference
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 9562
year: '2016'
...
---
_id: '1234'
abstract:
- lang: eng
text: We present a new algorithm for the statistical model checking of Markov chains
with respect to unbounded temporal properties, including full linear temporal
logic. The main idea is that we monitor each simulation run on the fly, in order
to detect quickly if a bottom strongly connected component is entered with high
probability, in which case the simulation run can be terminated early. As a result,
our simulation runs are often much shorter than required by termination bounds
that are computed a priori for a desired level of confidence on a large state
space. In comparison to previous algorithms for statistical model checking our
method is not only faster in many cases but also requires less information about
the system, namely, only the minimum transition probability that occurs in the
Markov chain. In addition, our method can be generalised to unbounded quantitative
properties such as mean-payoff bounds.
acknowledgement: "This research was funded in part by the European Research Council
(ERC) under\r\ngrant agreement 267989 (QUAREM), the Austrian Science Fund
\ (FWF) under\r\ngrants project S11402-N23 (RiSE) and Z211-N23 (Wittgenstein Award),
the Peo-\r\nple Programme (Marie Curie Actions) of the European Union’s Seventh
Framework\r\nProgramme (FP7/2007-2013) REA Grant No 291734, the SNSF Advanced Postdoc.\r\nMobility
Fellowship – grant number P300P2\r\n161067, and the Czech Science Foun-\r\ndation
under grant agreement P202/12/G061."
alternative_title:
- LNCS
article_processing_charge: No
arxiv: 1
author:
- first_name: Przemyslaw
full_name: Daca, Przemyslaw
id: 49351290-F248-11E8-B48F-1D18A9856A87
last_name: Daca
- first_name: Thomas A
full_name: Henzinger, Thomas A
id: 40876CD8-F248-11E8-B48F-1D18A9856A87
last_name: Henzinger
orcid: 0000−0002−2985−7724
- first_name: Jan
full_name: Kretinsky, Jan
id: 44CEF464-F248-11E8-B48F-1D18A9856A87
last_name: Kretinsky
orcid: 0000-0002-8122-2881
- first_name: Tatjana
full_name: Petrov, Tatjana
id: 3D5811FC-F248-11E8-B48F-1D18A9856A87
last_name: Petrov
orcid: 0000-0002-9041-0905
citation:
ama: 'Daca P, Henzinger TA, Kretinsky J, Petrov T. Faster statistical model checking
for unbounded temporal properties. In: Vol 9636. Springer; 2016:112-129. doi:10.1007/978-3-662-49674-9_7'
apa: 'Daca, P., Henzinger, T. A., Kretinsky, J., & Petrov, T. (2016). Faster
statistical model checking for unbounded temporal properties (Vol. 9636, pp. 112–129).
Presented at the TACAS: Tools and Algorithms for the Construction and Analysis
of Systems, Eindhoven, The Netherlands: Springer. https://doi.org/10.1007/978-3-662-49674-9_7'
chicago: Daca, Przemyslaw, Thomas A Henzinger, Jan Kretinsky, and Tatjana Petrov.
“Faster Statistical Model Checking for Unbounded Temporal Properties,” 9636:112–29.
Springer, 2016. https://doi.org/10.1007/978-3-662-49674-9_7.
ieee: 'P. Daca, T. A. Henzinger, J. Kretinsky, and T. Petrov, “Faster statistical
model checking for unbounded temporal properties,” presented at the TACAS: Tools
and Algorithms for the Construction and Analysis of Systems, Eindhoven, The Netherlands,
2016, vol. 9636, pp. 112–129.'
ista: 'Daca P, Henzinger TA, Kretinsky J, Petrov T. 2016. Faster statistical model
checking for unbounded temporal properties. TACAS: Tools and Algorithms for the
Construction and Analysis of Systems, LNCS, vol. 9636, 112–129.'
mla: Daca, Przemyslaw, et al. Faster Statistical Model Checking for Unbounded
Temporal Properties. Vol. 9636, Springer, 2016, pp. 112–29, doi:10.1007/978-3-662-49674-9_7.
short: P. Daca, T.A. Henzinger, J. Kretinsky, T. Petrov, in:, Springer, 2016, pp.
112–129.
conference:
end_date: 2016-04-08
location: Eindhoven, The Netherlands
name: 'TACAS: Tools and Algorithms for the Construction and Analysis of Systems'
start_date: 2016-04-02
date_created: 2018-12-11T11:50:51Z
date_published: 2016-01-01T00:00:00Z
date_updated: 2025-09-22T09:21:17Z
day: '01'
department:
- _id: ToHe
- _id: CaGu
doi: 10.1007/978-3-662-49674-9_7
ec_funded: 1
external_id:
arxiv:
- '1504.05739'
isi:
- '000406428000007'
intvolume: ' 9636'
isi: 1
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/abs/1504.05739
month: '01'
oa: 1
oa_version: Preprint
page: 112 - 129
project:
- _id: 25EE3708-B435-11E9-9278-68D0E5697425
call_identifier: FP7
grant_number: '267989'
name: Quantitative Reactive Modeling
- _id: 25832EC2-B435-11E9-9278-68D0E5697425
call_identifier: FWF
grant_number: S 11407_N23
name: Rigorous Systems Engineering
- _id: 25F42A32-B435-11E9-9278-68D0E5697425
call_identifier: FWF
grant_number: Z211
name: Formal methods for the design and analysis of complex systems
- _id: 25681D80-B435-11E9-9278-68D0E5697425
call_identifier: FP7
grant_number: '291734'
name: International IST Postdoc Fellowship Programme
publication_status: published
publisher: Springer
publist_id: '6099'
quality_controlled: '1'
related_material:
record:
- id: '1155'
relation: dissertation_contains
status: public
- id: '471'
relation: later_version
status: public
scopus_import: '1'
status: public
title: Faster statistical model checking for unbounded temporal properties
type: conference
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 9636
year: '2016'
...
---
_id: '1235'
abstract:
- lang: eng
text: 'A constrained pseudorandom function (CPRF) F: K×X → Y for a family T of subsets
of χ is a function where for any key k ∈ K and set S ∈ T one can efficiently compute
a short constrained key kS, which allows to evaluate F(k, ·) on all inputs x ∈
S, while the outputs on all inputs x /∈ S look random even given kS. Abusalah
et al. recently constructed the first constrained PRF for inputs of arbitrary
length whose sets S are decided by Turing machines. They use their CPRF to build
broadcast encryption and the first ID-based non-interactive key exchange for an
unbounded number of users. Their constrained keys are obfuscated circuits and
are therefore large. In this work we drastically reduce the key size and define
a constrained key for a Turing machine M as a short signature on M. For this,
we introduce a new signature primitive with constrained signing keys that let
one only sign certain messages, while forging a signature on others is hard even
when knowing the coins for key generation.'
acknowledgement: H. Abusalah—Research supported by the European Research Council,
ERC starting grant (259668-PSPC) and ERC consolidator grant (682815 - TOCNeT).
alternative_title:
- LNCS
article_processing_charge: No
author:
- first_name: Hamza M
full_name: Abusalah, Hamza M
id: 40297222-F248-11E8-B48F-1D18A9856A87
last_name: Abusalah
- first_name: Georg
full_name: Fuchsbauer, Georg
id: 46B4C3EE-F248-11E8-B48F-1D18A9856A87
last_name: Fuchsbauer
citation:
ama: 'Abusalah HM, Fuchsbauer G. Constrained PRFs for unbounded inputs with short
keys. In: Vol 9696. Springer; 2016:445-463. doi:10.1007/978-3-319-39555-5_24'
apa: 'Abusalah, H. M., & Fuchsbauer, G. (2016). Constrained PRFs for unbounded
inputs with short keys (Vol. 9696, pp. 445–463). Presented at the ACNS: Applied
Cryptography and Network Security, Guildford, UK: Springer. https://doi.org/10.1007/978-3-319-39555-5_24'
chicago: Abusalah, Hamza M, and Georg Fuchsbauer. “Constrained PRFs for Unbounded
Inputs with Short Keys,” 9696:445–63. Springer, 2016. https://doi.org/10.1007/978-3-319-39555-5_24.
ieee: 'H. M. Abusalah and G. Fuchsbauer, “Constrained PRFs for unbounded inputs
with short keys,” presented at the ACNS: Applied Cryptography and Network Security,
Guildford, UK, 2016, vol. 9696, pp. 445–463.'
ista: 'Abusalah HM, Fuchsbauer G. 2016. Constrained PRFs for unbounded inputs with
short keys. ACNS: Applied Cryptography and Network Security, LNCS, vol. 9696,
445–463.'
mla: Abusalah, Hamza M., and Georg Fuchsbauer. Constrained PRFs for Unbounded
Inputs with Short Keys. Vol. 9696, Springer, 2016, pp. 445–63, doi:10.1007/978-3-319-39555-5_24.
short: H.M. Abusalah, G. Fuchsbauer, in:, Springer, 2016, pp. 445–463.
conference:
end_date: 2016-06-22
location: Guildford, UK
name: 'ACNS: Applied Cryptography and Network Security'
start_date: 2016-06-19
date_created: 2018-12-11T11:50:52Z
date_published: 2016-01-01T00:00:00Z
date_updated: 2025-09-22T09:20:42Z
day: '01'
department:
- _id: KrPi
doi: 10.1007/978-3-319-39555-5_24
ec_funded: 1
external_id:
isi:
- '000386324500024'
intvolume: ' 9696'
isi: 1
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://eprint.iacr.org/2016/279.pdf
month: '01'
oa: 1
oa_version: Submitted Version
page: 445 - 463
project:
- _id: 258C570E-B435-11E9-9278-68D0E5697425
call_identifier: FP7
grant_number: '259668'
name: Provable Security for Physical Cryptography
- _id: 258AA5B2-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '682815'
name: Teaching Old Crypto New Tricks
publication_status: published
publisher: Springer
publist_id: '6098'
quality_controlled: '1'
related_material:
record:
- id: '83'
relation: dissertation_contains
status: public
scopus_import: '1'
status: public
title: Constrained PRFs for unbounded inputs with short keys
type: conference
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 9696
year: '2016'
...
---
_id: '1236'
abstract:
- lang: eng
text: 'A constrained pseudorandom function F: K × X → Y for a family T ⊆ 2X of subsets
of X is a function where for any key k ∈ K and set S ∈ T one can efficiently compute
a constrained key kS which allows to evaluate F (k, ·) on all inputs x ∈ S, while
even given this key, the outputs on all inputs x ∉ S look random. At Asiacrypt’13
Boneh and Waters gave a construction which supports the most general set family
so far. Its keys kc are defined for sets decided by boolean circuits C and enable
evaluation of the PRF on any x ∈ X where C(x) = 1. In their construction the PRF
input length and the size of the circuits C for which constrained keys can be
computed must be fixed beforehand during key generation. We construct a constrained
PRF that has an unbounded input length and whose constrained keys can be defined
for any set recognized by a Turing machine. The only a priori bound we make is
on the description size of the machines. We prove our construction secure assuming
publiccoin differing-input obfuscation. As applications of our constrained PRF
we build a broadcast encryption scheme where the number of potential receivers
need not be fixed at setup (in particular, the length of the keys is independent
of the number of parties) and the first identity-based non-interactive key exchange
protocol with no bound on the number of parties that can agree on a shared key.'
acknowledgement: Supported by the European Research Council, ERC Starting Grant (259668-PSPC).
alternative_title:
- LNCS
article_processing_charge: No
author:
- first_name: Hamza M
full_name: Abusalah, Hamza M
id: 40297222-F248-11E8-B48F-1D18A9856A87
last_name: Abusalah
- first_name: Georg
full_name: Fuchsbauer, Georg
id: 46B4C3EE-F248-11E8-B48F-1D18A9856A87
last_name: Fuchsbauer
- first_name: Krzysztof Z
full_name: Pietrzak, Krzysztof Z
id: 3E04A7AA-F248-11E8-B48F-1D18A9856A87
last_name: Pietrzak
orcid: 0000-0002-9139-1654
citation:
ama: 'Abusalah HM, Fuchsbauer G, Pietrzak KZ. Constrained PRFs for unbounded inputs.
In: Vol 9610. Springer; 2016:413-428. doi:10.1007/978-3-319-29485-8_24'
apa: 'Abusalah, H. M., Fuchsbauer, G., & Pietrzak, K. Z. (2016). Constrained
PRFs for unbounded inputs (Vol. 9610, pp. 413–428). Presented at the CT-RSA: Topics
in Cryptology, San Francisco, CA, USA: Springer. https://doi.org/10.1007/978-3-319-29485-8_24'
chicago: Abusalah, Hamza M, Georg Fuchsbauer, and Krzysztof Z Pietrzak. “Constrained
PRFs for Unbounded Inputs,” 9610:413–28. Springer, 2016. https://doi.org/10.1007/978-3-319-29485-8_24.
ieee: 'H. M. Abusalah, G. Fuchsbauer, and K. Z. Pietrzak, “Constrained PRFs for
unbounded inputs,” presented at the CT-RSA: Topics in Cryptology, San Francisco,
CA, USA, 2016, vol. 9610, pp. 413–428.'
ista: 'Abusalah HM, Fuchsbauer G, Pietrzak KZ. 2016. Constrained PRFs for unbounded
inputs. CT-RSA: Topics in Cryptology, LNCS, vol. 9610, 413–428.'
mla: Abusalah, Hamza M., et al. Constrained PRFs for Unbounded Inputs. Vol.
9610, Springer, 2016, pp. 413–28, doi:10.1007/978-3-319-29485-8_24.
short: H.M. Abusalah, G. Fuchsbauer, K.Z. Pietrzak, in:, Springer, 2016, pp. 413–428.
conference:
end_date: 2016-03-04
location: San Francisco, CA, USA
name: 'CT-RSA: Topics in Cryptology'
start_date: 2016-02-29
date_created: 2018-12-11T11:50:52Z
date_published: 2016-02-02T00:00:00Z
date_updated: 2025-09-22T09:20:00Z
day: '02'
ddc:
- '005'
- '600'
department:
- _id: KrPi
doi: 10.1007/978-3-319-29485-8_24
ec_funded: 1
external_id:
isi:
- '000374102500024'
file:
- access_level: open_access
checksum: 3851cee49933ae13b1272e516f213e13
content_type: application/pdf
creator: system
date_created: 2018-12-12T10:08:05Z
date_updated: 2020-07-14T12:44:41Z
file_id: '4664'
file_name: IST-2017-764-v1+1_279.pdf
file_size: 495176
relation: main_file
file_date_updated: 2020-07-14T12:44:41Z
has_accepted_license: '1'
intvolume: ' 9610'
isi: 1
language:
- iso: eng
month: '02'
oa: 1
oa_version: Submitted Version
page: 413 - 428
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: '6097'
pubrep_id: '764'
quality_controlled: '1'
related_material:
record:
- id: '83'
relation: dissertation_contains
status: public
scopus_import: '1'
status: public
title: Constrained PRFs for unbounded inputs
type: conference
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 9610
year: '2016'
...
---
_id: '1237'
abstract:
- lang: eng
text: 'Bitmap images of arbitrary dimension may be formally perceived as unions
of m-dimensional boxes aligned with respect to a rectangular grid in ℝm. Cohomology
and homology groups are well known topological invariants of such sets. Cohomological
operations, such as the cup product, provide higher-order algebraic topological
invariants, especially important for digital images of dimension higher than 3.
If such an operation is determined at the level of simplicial chains [see e.g.
González-Díaz, Real, Homology, Homotopy Appl, 2003, 83-93], then it is effectively
computable. However, decomposing a cubical complex into a simplicial one deleteriously
affects the efficiency of such an approach. In order to avoid this overhead, a
direct cubical approach was applied in [Pilarczyk, Real, Adv. Comput. Math., 2015,
253-275] for the cup product in cohomology, and implemented in the ChainCon software
package [http://www.pawelpilarczyk.com/chaincon/]. We establish a formula for
the Steenrod square operations [see Steenrod, Annals of Mathematics. Second Series,
1947, 290-320] directly at the level of cubical chains, and we prove the correctness
of this formula. An implementation of this formula is programmed in C++ within
the ChainCon software framework. We provide a few examples and discuss the effectiveness
of this approach. One specific application follows from the fact that Steenrod
squares yield tests for the topological extension problem: Can a given map A →
Sd to a sphere Sd be extended to a given super-complex X of A? In particular,
the ROB-SAT problem, which is to decide for a given function f: X → ℝm and a value
r > 0 whether every g: X → ℝm with ∥g - f ∥∞ ≤ r has a root, reduces to the
extension problem.'
acknowledgement: The research conducted by both authors has received funding from
the People Programme (Marie Curie Actions) of the European Union’s Seventh Framework
Programme (FP7/2007-2013) under REA grant agreements no. 291734 (for M. K.) and
no. 622033 (for P. P.).
alternative_title:
- LNCS
article_processing_charge: No
author:
- first_name: Marek
full_name: Krcál, Marek
id: 33E21118-F248-11E8-B48F-1D18A9856A87
last_name: Krcál
- first_name: Pawel
full_name: Pilarczyk, Pawel
id: 3768D56A-F248-11E8-B48F-1D18A9856A87
last_name: Pilarczyk
citation:
ama: 'Krcál M, Pilarczyk P. Computation of cubical Steenrod squares. In: Vol 9667.
Springer; 2016:140-151. doi:10.1007/978-3-319-39441-1_13'
apa: 'Krcál, M., & Pilarczyk, P. (2016). Computation of cubical Steenrod squares
(Vol. 9667, pp. 140–151). Presented at the CTIC: Computational Topology in Image
Context, Marseille, France: Springer. https://doi.org/10.1007/978-3-319-39441-1_13'
chicago: Krcál, Marek, and Pawel Pilarczyk. “Computation of Cubical Steenrod Squares,”
9667:140–51. Springer, 2016. https://doi.org/10.1007/978-3-319-39441-1_13.
ieee: 'M. Krcál and P. Pilarczyk, “Computation of cubical Steenrod squares,” presented
at the CTIC: Computational Topology in Image Context, Marseille, France, 2016,
vol. 9667, pp. 140–151.'
ista: 'Krcál M, Pilarczyk P. 2016. Computation of cubical Steenrod squares. CTIC:
Computational Topology in Image Context, LNCS, vol. 9667, 140–151.'
mla: Krcál, Marek, and Pawel Pilarczyk. Computation of Cubical Steenrod Squares.
Vol. 9667, Springer, 2016, pp. 140–51, doi:10.1007/978-3-319-39441-1_13.
short: M. Krcál, P. Pilarczyk, in:, Springer, 2016, pp. 140–151.
conference:
end_date: 2016-06-17
location: Marseille, France
name: 'CTIC: Computational Topology in Image Context'
start_date: 2016-06-15
date_created: 2018-12-11T11:50:52Z
date_published: 2016-06-02T00:00:00Z
date_updated: 2025-09-22T09:19:17Z
day: '02'
department:
- _id: UlWa
- _id: HeEd
doi: 10.1007/978-3-319-39441-1_13
ec_funded: 1
external_id:
isi:
- '000389805800013'
intvolume: ' 9667'
isi: 1
language:
- iso: eng
month: '06'
oa_version: None
page: 140 - 151
project:
- _id: 25681D80-B435-11E9-9278-68D0E5697425
call_identifier: FP7
grant_number: '291734'
name: International IST Postdoc Fellowship Programme
- _id: 255F06BE-B435-11E9-9278-68D0E5697425
call_identifier: FP7
grant_number: '622033'
name: Persistent Homology - Images, Data and Maps
publication_status: published
publisher: Springer
publist_id: '6096'
quality_controlled: '1'
scopus_import: '1'
status: public
title: Computation of cubical Steenrod squares
type: conference
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 9667
year: '2016'
...
---
_id: '1238'
abstract:
- lang: eng
text: The dynamic localization of endosomal compartments labeled with targeted fluorescent
protein tags is routinely followed by time lapse fluorescence microscopy approaches
and single particle tracking algorithms. In this way trajectories of individual
endosomes can be mapped and linked to physiological processes as cell growth.
However, other aspects of dynamic behavior including endosomal interactions are
difficult to follow in this manner. Therefore, we characterized the localization
and dynamic properties of early and late endosomes throughout the entire course
of root hair formation by means of spinning disc time lapse imaging and post-acquisition
automated multitracking and quantitative analysis. Our results show differential
motile behavior of early and late endosomes and interactions of late endosomes
that may be specified to particular root hair domains. Detailed data analysis
revealed a particular transient interaction between late endosomes—termed herein
as dancing-endosomes—which is not concluding to vesicular fusion. Endosomes preferentially
located in the root hair tip interacted as dancing-endosomes and traveled short
distances during this interaction. Finally, sizes of early and late endosomes
were addressed by means of super-resolution structured illumination microscopy
(SIM) to corroborate measurements on the spinning disc. This is a first study
providing quantitative microscopic data on dynamic spatio-temporal interactions
of endosomes during root hair tip growth.
acknowledgement: "This work was supported by National Program for Sustainability I
(grant no. LO1204) provided by the Czech Ministry of Education and by Institutional
Fund of Palacký University Olomouc (GK and OŠ).\r\nWe thank Sabine Fischer for help
with the statistics."
article_number: '1262'
article_processing_charge: No
author:
- first_name: Daniel
full_name: Von Wangenheim, Daniel
id: 49E91952-F248-11E8-B48F-1D18A9856A87
last_name: Von Wangenheim
orcid: 0000-0002-6862-1247
- first_name: Amparo
full_name: Rosero, Amparo
last_name: Rosero
- first_name: George
full_name: Komis, George
last_name: Komis
- first_name: Olga
full_name: Šamajová, Olga
last_name: Šamajová
- first_name: Miroslav
full_name: Ovečka, Miroslav
last_name: Ovečka
- first_name: Boris
full_name: Voigt, Boris
last_name: Voigt
- first_name: Jozef
full_name: Šamaj, Jozef
last_name: Šamaj
citation:
ama: von Wangenheim D, Rosero A, Komis G, et al. Endosomal interactions during root
hair growth. Frontiers in Plant Science. 2016;6(JAN2016). doi:10.3389/fpls.2015.01262
apa: von Wangenheim, D., Rosero, A., Komis, G., Šamajová, O., Ovečka, M., Voigt,
B., & Šamaj, J. (2016). Endosomal interactions during root hair growth. Frontiers
in Plant Science. Frontiers Research Foundation. https://doi.org/10.3389/fpls.2015.01262
chicago: Wangenheim, Daniel von, Amparo Rosero, George Komis, Olga Šamajová, Miroslav
Ovečka, Boris Voigt, and Jozef Šamaj. “Endosomal Interactions during Root Hair
Growth.” Frontiers in Plant Science. Frontiers Research Foundation, 2016.
https://doi.org/10.3389/fpls.2015.01262.
ieee: D. von Wangenheim et al., “Endosomal interactions during root hair
growth,” Frontiers in Plant Science, vol. 6, no. JAN2016. Frontiers Research
Foundation, 2016.
ista: von Wangenheim D, Rosero A, Komis G, Šamajová O, Ovečka M, Voigt B, Šamaj
J. 2016. Endosomal interactions during root hair growth. Frontiers in Plant Science.
6(JAN2016), 1262.
mla: von Wangenheim, Daniel, et al. “Endosomal Interactions during Root Hair Growth.”
Frontiers in Plant Science, vol. 6, no. JAN2016, 1262, Frontiers Research
Foundation, 2016, doi:10.3389/fpls.2015.01262.
short: D. von Wangenheim, A. Rosero, G. Komis, O. Šamajová, M. Ovečka, B. Voigt,
J. Šamaj, Frontiers in Plant Science 6 (2016).
date_created: 2018-12-11T11:50:53Z
date_published: 2016-01-29T00:00:00Z
date_updated: 2025-09-22T09:18:11Z
day: '29'
ddc:
- '581'
department:
- _id: JiFr
doi: 10.3389/fpls.2015.01262
external_id:
isi:
- '000368891500001'
file:
- access_level: open_access
checksum: 3127eab844d53564bf47e2b6b42f1ca0
content_type: application/pdf
creator: system
date_created: 2018-12-12T10:09:36Z
date_updated: 2020-07-14T12:44:41Z
file_id: '4760'
file_name: IST-2016-710-v1+1_fpls-06-01262.pdf
file_size: 1640550
relation: main_file
file_date_updated: 2020-07-14T12:44:41Z
has_accepted_license: '1'
intvolume: ' 6'
isi: 1
issue: JAN2016
language:
- iso: eng
license: https://creativecommons.org/licenses/by/4.0/
month: '01'
oa: 1
oa_version: Published Version
publication: Frontiers in Plant Science
publication_status: published
publisher: Frontiers Research Foundation
publist_id: '6094'
pubrep_id: '710'
quality_controlled: '1'
scopus_import: '1'
status: public
title: Endosomal interactions during root hair growth
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 6
year: '2016'
...
---
_id: '1239'
abstract:
- lang: eng
text: Nonadherent polarized cells have been observed to have a pearlike, elongated
shape. Using a minimal model that describes the cell cortex as a thin layer of
contractile active gel, we show that the anisotropy of active stresses, controlled
by cortical viscosity and filament ordering, can account for this morphology.
The predicted shapes can be determined from the flow pattern only; they prove
to be independent of the mechanism at the origin of the cortical flow, and are
only weakly sensitive to the cytoplasmic rheology. In the case of actin flows
resulting from a contractile instability, we propose a phase diagram of three-dimensional
cell shapes that encompasses nonpolarized spherical, elongated, as well as oblate
shapes, all of which have been observed in experiment.
acknowledgement: 'V. R. acknowledges support by the Austrian Science Fund (FWF): (Grant
No. T560-B17).'
article_number: '028102'
article_processing_charge: No
author:
- first_name: Andrew
full_name: Callan Jones, Andrew
last_name: Callan Jones
- first_name: Verena
full_name: Ruprecht, Verena
id: 4D71A03A-F248-11E8-B48F-1D18A9856A87
last_name: Ruprecht
orcid: 0000-0003-4088-8633
- first_name: Stefan
full_name: Wieser, Stefan
id: 355AA5A0-F248-11E8-B48F-1D18A9856A87
last_name: Wieser
orcid: 0000-0002-2670-2217
- first_name: Carl-Philipp J
full_name: Heisenberg, Carl-Philipp J
id: 39427864-F248-11E8-B48F-1D18A9856A87
last_name: Heisenberg
orcid: 0000-0002-0912-4566
- first_name: Raphaël
full_name: Voituriez, Raphaël
last_name: Voituriez
citation:
ama: Callan Jones A, Ruprecht V, Wieser S, Heisenberg C-PJ, Voituriez R. Cortical
flow-driven shapes of nonadherent cells. Physical Review Letters. 2016;116(2).
doi:10.1103/PhysRevLett.116.028102
apa: Callan Jones, A., Ruprecht, V., Wieser, S., Heisenberg, C.-P. J., & Voituriez,
R. (2016). Cortical flow-driven shapes of nonadherent cells. Physical Review
Letters. American Physical Society. https://doi.org/10.1103/PhysRevLett.116.028102
chicago: Callan Jones, Andrew, Verena Ruprecht, Stefan Wieser, Carl-Philipp J Heisenberg,
and Raphaël Voituriez. “Cortical Flow-Driven Shapes of Nonadherent Cells.” Physical
Review Letters. American Physical Society, 2016. https://doi.org/10.1103/PhysRevLett.116.028102.
ieee: A. Callan Jones, V. Ruprecht, S. Wieser, C.-P. J. Heisenberg, and R. Voituriez,
“Cortical flow-driven shapes of nonadherent cells,” Physical Review Letters,
vol. 116, no. 2. American Physical Society, 2016.
ista: Callan Jones A, Ruprecht V, Wieser S, Heisenberg C-PJ, Voituriez R. 2016.
Cortical flow-driven shapes of nonadherent cells. Physical Review Letters. 116(2),
028102.
mla: Callan Jones, Andrew, et al. “Cortical Flow-Driven Shapes of Nonadherent Cells.”
Physical Review Letters, vol. 116, no. 2, 028102, American Physical Society,
2016, doi:10.1103/PhysRevLett.116.028102.
short: A. Callan Jones, V. Ruprecht, S. Wieser, C.-P.J. Heisenberg, R. Voituriez,
Physical Review Letters 116 (2016).
date_created: 2018-12-11T11:50:53Z
date_published: 2016-01-15T00:00:00Z
date_updated: 2025-09-22T09:18:45Z
day: '15'
department:
- _id: CaHe
doi: 10.1103/PhysRevLett.116.028102
external_id:
isi:
- '000368286300022'
intvolume: ' 116'
isi: 1
issue: '2'
language:
- iso: eng
month: '01'
oa_version: None
project:
- _id: 2529486C-B435-11E9-9278-68D0E5697425
call_identifier: FWF
grant_number: T 560-B17
name: Cell- and Tissue Mechanics in Zebrafish Germ Layer Formation
publication: Physical Review Letters
publication_status: published
publisher: American Physical Society
publist_id: '6095'
quality_controlled: '1'
scopus_import: '1'
status: public
title: Cortical flow-driven shapes of nonadherent cells
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 116
year: '2016'
...
---
_id: '1240'
abstract:
- lang: eng
text: 'Background: Long non-coding RNAs (lncRNAs) are increasingly implicated as
gene regulators and may ultimately be more numerous than protein-coding genes
in the human genome. Despite large numbers of reported lncRNAs, reference annotations
are likely incomplete due to their lower and tighter tissue-specific expression
compared to mRNAs. An unexplored factor potentially confounding lncRNA identification
is inter-individual expression variability. Here, we characterize lncRNA natural
expression variability in human primary granulocytes. Results: We annotate granulocyte
lncRNAs and mRNAs in RNA-seq data from 10 healthy individuals, identifying multiple
lncRNAs absent from reference annotations, and use this to investigate three known
features (higher tissue-specificity, lower expression, and reduced splicing efficiency)
of lncRNAs relative to mRNAs. Expression variability was examined in seven individuals
sampled three times at 1- or more than 1-month intervals. We show that lncRNAs
display significantly more inter-individual expression variability compared to
mRNAs. We confirm this finding in two independent human datasets by analyzing
multiple tissues from the GTEx project and lymphoblastoid cell lines from the
GEUVADIS project. Using the latter dataset we also show that including more human
donors into the transcriptome annotation pipeline allows identification of an
increasing number of lncRNAs, but minimally affects mRNA gene number. Conclusions:
A comprehensive annotation of lncRNAs is known to require an approach that is
sensitive to low and tight tissue-specific expression. Here we show that increased
inter-individual expression variability is an additional general lncRNA feature
to consider when creating a comprehensive annotation of human lncRNAs or proposing
their use as prognostic or disease markers.'
acknowledgement: "This study was partly funded by the Austrian Science Fund (FWF F43-B09,
FWF W1207-B09). PMG is a recipient of a DOC Fellowship of the Austrian Academy of
Sciences.\r\nWe thank Ruth Klement, Tomasz Kulinski, Elisangela Valente, Elisabeth
Salzer,\r\nand Roland Jäger for technical/bioinformatic assistance and advice, the
CeMM\r\nIT department and José Manuel Molero for help and advice on software usage,\r\nthe
Biomedical Sequencing Facility (http://biomedical-sequencing.at/) for\r\nsequencing
and advice, Jacques Colinge, Daniel Andergassen, and Tomasz\r\nKulinski for discussions,
Quanah Hudson and Jörg Menche for reading and\r\ncommenting on the manuscript."
article_number: '14'
article_processing_charge: No
author:
- first_name: Aleksandra
full_name: Kornienko, Aleksandra
last_name: Kornienko
- first_name: Christoph
full_name: Dotter, Christoph
id: 4C66542E-F248-11E8-B48F-1D18A9856A87
last_name: Dotter
orcid: 0000-0002-9033-9096
- first_name: Philipp
full_name: Guenzl, Philipp
last_name: Guenzl
- first_name: Heinz
full_name: Gisslinger, Heinz
last_name: Gisslinger
- first_name: Bettina
full_name: Gisslinger, Bettina
last_name: Gisslinger
- first_name: Ciara
full_name: Cleary, Ciara
last_name: Cleary
- first_name: Robert
full_name: Kralovics, Robert
last_name: Kralovics
- first_name: Florian
full_name: Pauler, Florian
id: 48EA0138-F248-11E8-B48F-1D18A9856A87
last_name: Pauler
orcid: 0000-0002-7462-0048
- first_name: Denise
full_name: Barlow, Denise
last_name: Barlow
citation:
ama: Kornienko A, Dotter C, Guenzl P, et al. Long non-coding RNAs display higher
natural expression variation than protein-coding genes in healthy humans. Genome
Biology. 2016;17(1). doi:10.1186/s13059-016-0873-8
apa: Kornienko, A., Dotter, C., Guenzl, P., Gisslinger, H., Gisslinger, B., Cleary,
C., … Barlow, D. (2016). Long non-coding RNAs display higher natural expression
variation than protein-coding genes in healthy humans. Genome Biology.
BioMed Central. https://doi.org/10.1186/s13059-016-0873-8
chicago: Kornienko, Aleksandra, Christoph Dotter, Philipp Guenzl, Heinz Gisslinger,
Bettina Gisslinger, Ciara Cleary, Robert Kralovics, Florian Pauler, and Denise
Barlow. “Long Non-Coding RNAs Display Higher Natural Expression Variation than
Protein-Coding Genes in Healthy Humans.” Genome Biology. BioMed Central,
2016. https://doi.org/10.1186/s13059-016-0873-8.
ieee: A. Kornienko et al., “Long non-coding RNAs display higher natural expression
variation than protein-coding genes in healthy humans,” Genome Biology,
vol. 17, no. 1. BioMed Central, 2016.
ista: Kornienko A, Dotter C, Guenzl P, Gisslinger H, Gisslinger B, Cleary C, Kralovics
R, Pauler F, Barlow D. 2016. Long non-coding RNAs display higher natural expression
variation than protein-coding genes in healthy humans. Genome Biology. 17(1),
14.
mla: Kornienko, Aleksandra, et al. “Long Non-Coding RNAs Display Higher Natural
Expression Variation than Protein-Coding Genes in Healthy Humans.” Genome Biology,
vol. 17, no. 1, 14, BioMed Central, 2016, doi:10.1186/s13059-016-0873-8.
short: A. Kornienko, C. Dotter, P. Guenzl, H. Gisslinger, B. Gisslinger, C. Cleary,
R. Kralovics, F. Pauler, D. Barlow, Genome Biology 17 (2016).
date_created: 2018-12-11T11:50:53Z
date_published: 2016-01-29T00:00:00Z
date_updated: 2025-09-22T09:17:40Z
day: '29'
ddc:
- '576'
department:
- _id: GaNo
doi: 10.1186/s13059-016-0873-8
external_id:
isi:
- '000368904100001'
file:
- access_level: open_access
checksum: a268beee1a690801c83ec6729f9ebc5b
content_type: application/pdf
creator: system
date_created: 2018-12-12T10:10:05Z
date_updated: 2020-07-14T12:44:41Z
file_id: '4789'
file_name: IST-2016-709-v1+1_s13059-016-0873-8.pdf
file_size: 2914601
relation: main_file
file_date_updated: 2020-07-14T12:44:41Z
has_accepted_license: '1'
intvolume: ' 17'
isi: 1
issue: '1'
language:
- iso: eng
month: '01'
oa: 1
oa_version: Published Version
publication: Genome Biology
publication_status: published
publisher: BioMed Central
publist_id: '6093'
pubrep_id: '709'
quality_controlled: '1'
scopus_import: '1'
status: public
title: Long non-coding RNAs display higher natural expression variation than protein-coding
genes in healthy humans
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 17
year: '2016'
...
---
_id: '1241'
abstract:
- lang: eng
text: 'How likely is it that a population escapes extinction through adaptive evolution?
The answer to this question is of great relevance in conservation biology, where
we aim at species’ rescue and the maintenance of biodiversity, and in agriculture
and medicine, where we seek to hamper the emergence of pesticide or drug resistance.
By reshuffling the genome, recombination has two antagonistic effects on the probability
of evolutionary rescue: It generates and it breaks up favorable gene combinations.
Which of the two effects prevails depends on the fitness effects of mutations
and on the impact of stochasticity on the allele frequencies. In this article,
we analyze a mathematical model for rescue after a sudden environmental change
when adaptation is contingent on mutations at two loci. The analysis reveals a
complex nonlinear dependence of population survival on recombination. We moreover
find that, counterintuitively, a fast eradication of the wild type can promote
rescue in the presence of recombination. The model also shows that two-step rescue
is not unlikely to happen and can even be more likely than single-step rescue
(where adaptation relies on a single mutation), depending on the circumstances.'
acknowledgement: This work was made possible by a “For Women in Science” fellowship
(L’Oréal Österreich in cooperation with the Austrian Commission for the United Nations
Educational, Scientific, and Cultural Organization and the Austrian Academy of Sciences
with financial support from the Federal Ministry for Science and Research Austria)
and European Research Council grant 250152 (to Nick Barton).
article_processing_charge: No
author:
- first_name: Hildegard
full_name: Uecker, Hildegard
id: 2DB8F68A-F248-11E8-B48F-1D18A9856A87
last_name: Uecker
orcid: 0000-0001-9435-2813
- first_name: Joachim
full_name: Hermisson, Joachim
last_name: Hermisson
citation:
ama: Uecker H, Hermisson J. The role of recombination in evolutionary rescue. Genetics.
2016;202(2):721-732. doi:10.1534/genetics.115.180299
apa: Uecker, H., & Hermisson, J. (2016). The role of recombination in evolutionary
rescue. Genetics. Genetics Society of America. https://doi.org/10.1534/genetics.115.180299
chicago: Uecker, Hildegard, and Joachim Hermisson. “The Role of Recombination in
Evolutionary Rescue.” Genetics. Genetics Society of America, 2016. https://doi.org/10.1534/genetics.115.180299.
ieee: H. Uecker and J. Hermisson, “The role of recombination in evolutionary rescue,”
Genetics, vol. 202, no. 2. Genetics Society of America, pp. 721–732, 2016.
ista: Uecker H, Hermisson J. 2016. The role of recombination in evolutionary rescue.
Genetics. 202(2), 721–732.
mla: Uecker, Hildegard, and Joachim Hermisson. “The Role of Recombination in Evolutionary
Rescue.” Genetics, vol. 202, no. 2, Genetics Society of America, 2016,
pp. 721–32, doi:10.1534/genetics.115.180299.
short: H. Uecker, J. Hermisson, Genetics 202 (2016) 721–732.
date_created: 2018-12-11T11:50:54Z
date_published: 2016-02-01T00:00:00Z
date_updated: 2025-09-22T09:17:06Z
day: '01'
department:
- _id: NiBa
doi: 10.1534/genetics.115.180299
ec_funded: 1
external_id:
isi:
- '000371304600028'
intvolume: ' 202'
isi: 1
issue: '2'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: http://biorxiv.org/content/early/2015/07/06/022020.abstract
month: '02'
oa: 1
oa_version: Preprint
page: 721 - 732
project:
- _id: 25B07788-B435-11E9-9278-68D0E5697425
call_identifier: FP7
grant_number: '250152'
name: Limits to selection in biology and in evolutionary computation
- _id: 25B67606-B435-11E9-9278-68D0E5697425
name: Evolutionary rescue
publication: Genetics
publication_status: published
publisher: Genetics Society of America
publist_id: '6091'
quality_controlled: '1'
scopus_import: '1'
status: public
title: The role of recombination in evolutionary rescue
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 202
year: '2016'
...
---
_id: '1242'
abstract:
- lang: eng
text: A crucial step in the regulation of gene expression is binding of transcription
factor (TF) proteins to regulatory sites along the DNA. But transcription factors
act at nanomolar concentrations, and noise due to random arrival of these molecules
at their binding sites can severely limit the precision of regulation. Recent
work on the optimization of information flow through regulatory networks indicates
that the lower end of the dynamic range of concentrations is simply inaccessible,
overwhelmed by the impact of this noise. Motivated by the behavior of homeodomain
proteins, such as the maternal morphogen Bicoid in the fruit fly embryo, we suggest
a scheme in which transcription factors also act as indirect translational regulators,
binding to the mRNA of other regulatory proteins. Intuitively, each mRNA molecule
acts as an independent sensor of the input concentration, and averaging over these
multiple sensors reduces the noise. We analyze information flow through this scheme
and identify conditions under which it outperforms direct transcriptional regulation.
Our results suggest that the dual role of homeodomain proteins is not just a historical
accident, but a solution to a crucial physics problem in the regulation of gene
expression.
acknowledgement: "We thank T. Gregor, A. Prochaintz, and others for\r\nhelpful discussions.
This work was supported in part by\r\nGrants No. PHY-1305525 and No. CCF-0939370
from the\r\nUS National Science Foundation and by the W.M. Keck\r\nFoundation. A.M.W.
acknowledges the support by European\r\nResearch Council (ERC) Grant No. MCCIG PCIG10–GA-\r\n2011–303561.
G.T. and T.R.S. were supported by Austrian\r\nScience Fund (FWF) Grant No. P28844S."
article_number: '022404'
article_processing_charge: No
arxiv: 1
author:
- first_name: Thomas R
full_name: Sokolowski, Thomas R
id: 3E999752-F248-11E8-B48F-1D18A9856A87
last_name: Sokolowski
orcid: 0000-0002-1287-3779
- first_name: Aleksandra
full_name: Walczak, Aleksandra
last_name: Walczak
- first_name: William
full_name: Bialek, William
last_name: Bialek
- first_name: Gasper
full_name: Tkacik, Gasper
id: 3D494DCA-F248-11E8-B48F-1D18A9856A87
last_name: Tkacik
orcid: 0000-0002-6699-1455
citation:
ama: Sokolowski TR, Walczak A, Bialek W, Tkačik G. Extending the dynamic range of
transcription factor action by translational regulation. Physical Review E
Statistical Nonlinear and Soft Matter Physics. 2016;93(2). doi:10.1103/PhysRevE.93.022404
apa: Sokolowski, T. R., Walczak, A., Bialek, W., & Tkačik, G. (2016). Extending
the dynamic range of transcription factor action by translational regulation.
Physical Review E Statistical Nonlinear and Soft Matter Physics. American
Institute of Physics. https://doi.org/10.1103/PhysRevE.93.022404
chicago: Sokolowski, Thomas R, Aleksandra Walczak, William Bialek, and Gašper Tkačik.
“Extending the Dynamic Range of Transcription Factor Action by Translational Regulation.”
Physical Review E Statistical Nonlinear and Soft Matter Physics. American
Institute of Physics, 2016. https://doi.org/10.1103/PhysRevE.93.022404.
ieee: T. R. Sokolowski, A. Walczak, W. Bialek, and G. Tkačik, “Extending the dynamic
range of transcription factor action by translational regulation,” Physical
Review E Statistical Nonlinear and Soft Matter Physics, vol. 93, no. 2. American
Institute of Physics, 2016.
ista: Sokolowski TR, Walczak A, Bialek W, Tkačik G. 2016. Extending the dynamic
range of transcription factor action by translational regulation. Physical Review
E Statistical Nonlinear and Soft Matter Physics. 93(2), 022404.
mla: Sokolowski, Thomas R., et al. “Extending the Dynamic Range of Transcription
Factor Action by Translational Regulation.” Physical Review E Statistical Nonlinear
and Soft Matter Physics, vol. 93, no. 2, 022404, American Institute of Physics,
2016, doi:10.1103/PhysRevE.93.022404.
short: T.R. Sokolowski, A. Walczak, W. Bialek, G. Tkačik, Physical Review E Statistical
Nonlinear and Soft Matter Physics 93 (2016).
date_created: 2018-12-11T11:50:54Z
date_published: 2016-02-04T00:00:00Z
date_updated: 2025-09-22T09:16:30Z
day: '04'
department:
- _id: GaTk
doi: 10.1103/PhysRevE.93.022404
external_id:
arxiv:
- '1507.02562'
isi:
- '000369439100005'
intvolume: ' 93'
isi: 1
issue: '2'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/abs/1507.02562
month: '02'
oa: 1
oa_version: Preprint
project:
- _id: 254E9036-B435-11E9-9278-68D0E5697425
call_identifier: FWF
grant_number: P28844-B27
name: Biophysics of information processing in gene regulation
publication: Physical Review E Statistical Nonlinear and Soft Matter Physics
publication_status: published
publisher: American Institute of Physics
publist_id: '6088'
quality_controlled: '1'
scopus_import: '1'
status: public
title: Extending the dynamic range of transcription factor action by translational
regulation
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 93
year: '2016'
...
---
_id: '1243'
abstract:
- lang: eng
text: Restriction-modification (RM) systems represent a minimal and ubiquitous biological
system of self/non-self discrimination in prokaryotes [1], which protects hosts
from exogenous DNA [2]. The mechanism is based on the balance between methyltransferase
(M) and cognate restriction endonuclease (R). M tags endogenous DNA as self by
methylating short specific DNA sequences called restriction sites, whereas R recognizes
unmethylated restriction sites as non-self and introduces a double-stranded DNA
break [3]. Restriction sites are significantly underrepresented in prokaryotic
genomes [4-7], suggesting that the discrimination mechanism is imperfect and occasionally
leads to autoimmunity due to self-DNA cleavage (self-restriction) [8]. Furthermore,
RM systems can promote DNA recombination [9] and contribute to genetic variation
in microbial populations, thus facilitating adaptive evolution [10]. However,
cleavage of self-DNA by RM systems as elements shaping prokaryotic genomes has
not been directly detected, and its cause, frequency, and outcome are unknown.
We quantify self-restriction caused by two RM systems of Escherichia coli and
find that, in agreement with levels of restriction site avoidance, EcoRI, but
not EcoRV, cleaves self-DNA at a measurable rate. Self-restriction is a stochastic
process, which temporarily induces the SOS response, and is followed by DNA repair,
maintaining cell viability. We find that RM systems with higher restriction efficiency
against bacteriophage infections exhibit a higher rate of self-restriction, and
that this rate can be further increased by stochastic imbalance between R and
M. Our results identify molecular noise in RM systems as a factor shaping prokaryotic
genomes.
acknowledgement: This work was funded by an HFSP Young Investigators’ grant. M.P.
is a recipient of a DOC Fellowship of the Austrian Academy of Science at the Institute
of Science and Technology Austria. R.O. and Y.W. were supported by the Platform
for Dynamic Approaches to Living System from MEXT, Japan. We wish to thank I. Kobayashi
for providing us with the EcoRI and EcoRV plasmids, and A. Campbell for providing
us with the λ vir phage. We thank D. Siekhaus and C. Uhler and members of the C.C.G.
and J.P. Bollback laboratories for in-depth discussions. We thank B. Stern for comments
on an earlier version of the manuscript. We especially thank B.R. Levin for advice
and comments, and the anonymous reviewers for significantly improving the manuscript.
article_processing_charge: No
author:
- first_name: Maros
full_name: Pleska, Maros
id: 4569785E-F248-11E8-B48F-1D18A9856A87
last_name: Pleska
orcid: 0000-0001-7460-7479
- first_name: Long
full_name: Qian, Long
last_name: Qian
- first_name: Reiko
full_name: Okura, Reiko
last_name: Okura
- first_name: Tobias
full_name: Bergmiller, Tobias
id: 2C471CFA-F248-11E8-B48F-1D18A9856A87
last_name: Bergmiller
orcid: 0000-0001-5396-4346
- first_name: Yuichi
full_name: Wakamoto, Yuichi
last_name: Wakamoto
- first_name: Edo
full_name: Kussell, Edo
last_name: Kussell
- first_name: Calin C
full_name: Guet, Calin C
id: 47F8433E-F248-11E8-B48F-1D18A9856A87
last_name: Guet
orcid: 0000-0001-6220-2052
citation:
ama: Pleska M, Qian L, Okura R, et al. Bacterial autoimmunity due to a restriction-modification
system. Current Biology. 2016;26(3):404-409. doi:10.1016/j.cub.2015.12.041
apa: Pleska, M., Qian, L., Okura, R., Bergmiller, T., Wakamoto, Y., Kussell, E.,
& Guet, C. C. (2016). Bacterial autoimmunity due to a restriction-modification
system. Current Biology. Cell Press. https://doi.org/10.1016/j.cub.2015.12.041
chicago: Pleska, Maros, Long Qian, Reiko Okura, Tobias Bergmiller, Yuichi Wakamoto,
Edo Kussell, and Calin C Guet. “Bacterial Autoimmunity Due to a Restriction-Modification
System.” Current Biology. Cell Press, 2016. https://doi.org/10.1016/j.cub.2015.12.041.
ieee: M. Pleska et al., “Bacterial autoimmunity due to a restriction-modification
system,” Current Biology, vol. 26, no. 3. Cell Press, pp. 404–409, 2016.
ista: Pleska M, Qian L, Okura R, Bergmiller T, Wakamoto Y, Kussell E, Guet CC. 2016.
Bacterial autoimmunity due to a restriction-modification system. Current Biology.
26(3), 404–409.
mla: Pleska, Maros, et al. “Bacterial Autoimmunity Due to a Restriction-Modification
System.” Current Biology, vol. 26, no. 3, Cell Press, 2016, pp. 404–09,
doi:10.1016/j.cub.2015.12.041.
short: M. Pleska, L. Qian, R. Okura, T. Bergmiller, Y. Wakamoto, E. Kussell, C.C.
Guet, Current Biology 26 (2016) 404–409.
date_created: 2018-12-11T11:50:54Z
date_published: 2016-02-08T00:00:00Z
date_updated: 2025-09-22T09:15:58Z
day: '08'
department:
- _id: CaGu
doi: 10.1016/j.cub.2015.12.041
external_id:
isi:
- '000369502900034'
intvolume: ' 26'
isi: 1
issue: '3'
language:
- iso: eng
month: '02'
oa_version: None
page: 404 - 409
project:
- _id: 251D65D8-B435-11E9-9278-68D0E5697425
grant_number: '24210'
name: Effects of Stochasticity on the Function of Restriction-Modi cation Systems
at the Single-Cell Level
publication: Current Biology
publication_status: published
publisher: Cell Press
publist_id: '6087'
quality_controlled: '1'
related_material:
record:
- id: '202'
relation: dissertation_contains
status: public
scopus_import: '1'
status: public
title: Bacterial autoimmunity due to a restriction-modification system
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 26
year: '2016'
...
---
_id: '1244'
abstract:
- lang: eng
text: Cell polarity refers to a functional spatial organization of proteins that
is crucial for the control of essential cellular processes such as growth and
division. To establish polarity, cells rely on elaborate regulation networks that
control the distribution of proteins at the cell membrane. In fission yeast cells,
a microtubule-dependent network has been identified that polarizes the distribution
of signaling proteins that restricts growth to cell ends and targets the cytokinetic
machinery to the middle of the cell. Although many molecular components have been
shown to play a role in this network, it remains unknown which molecular functionalities
are minimally required to establish a polarized protein distribution in this system.
Here we show that a membrane-binding protein fragment, which distributes homogeneously
in wild-type fission yeast cells, can be made to concentrate at cell ends by attaching
it to a cytoplasmic microtubule end-binding protein. This concentration results
in a polarized pattern of chimera proteins with a spatial extension that is very
reminiscent of natural polarity patterns in fission yeast. However, chimera levels
fluctuate in response to microtubule dynamics, and disruption of microtubules
leads to disappearance of the pattern. Numerical simulations confirm that the
combined functionality of membrane anchoring and microtubule tip affinity is in
principle sufficient to create polarized patterns. Our chimera protein may thus
represent a simple molecular functionality that is able to polarize the membrane,
onto which additional layers of molecular complexity may be built to provide the
temporal robustness that is typical of natural polarity patterns.
acknowledgement: "We thank Sophie Martin, Ken Sawin, Stephen Huisman,\r\nand Damian
Brunner for strains; Julianne\r\nTeapal, Marcel Janson, Sergio Rincon,\r\nand Phong
Tran for technical assistance; Andrew Mugler and Bela Mulder for\r\ndiscussions;
and Sander Tans, Phong Tran,\r\nand Anne Paoletti for critical reading\r\nof the
manuscript. This work is part of the research program of the\r\n“\r\nStichting\r\nvoor
Fundamenteel Onderzoek de Materie,\r\n”\r\nwhich is financially supported by\r\nthe\r\n“\r\nNederlandse
organisatie voor Wete\r\nnschappelijk Onderzoek (NWO).\r\n”"
article_processing_charge: No
author:
- first_name: Pierre
full_name: Recouvreux, Pierre
last_name: Recouvreux
- first_name: Thomas R
full_name: Sokolowski, Thomas R
id: 3E999752-F248-11E8-B48F-1D18A9856A87
last_name: Sokolowski
orcid: 0000-0002-1287-3779
- first_name: Aristea
full_name: Grammoustianou, Aristea
last_name: Grammoustianou
- first_name: Pieter
full_name: Tenwolde, Pieter
last_name: Tenwolde
- first_name: Marileen
full_name: Dogterom, Marileen
last_name: Dogterom
citation:
ama: Recouvreux P, Sokolowski TR, Grammoustianou A, Tenwolde P, Dogterom M. Chimera
proteins with affinity for membranes and microtubule tips polarize in the membrane
of fission yeast cells. PNAS. 2016;113(7):1811-1816. doi:10.1073/pnas.1419248113
apa: Recouvreux, P., Sokolowski, T. R., Grammoustianou, A., Tenwolde, P., &
Dogterom, M. (2016). Chimera proteins with affinity for membranes and microtubule
tips polarize in the membrane of fission yeast cells. PNAS. National Academy
of Sciences. https://doi.org/10.1073/pnas.1419248113
chicago: Recouvreux, Pierre, Thomas R Sokolowski, Aristea Grammoustianou, Pieter
Tenwolde, and Marileen Dogterom. “Chimera Proteins with Affinity for Membranes
and Microtubule Tips Polarize in the Membrane of Fission Yeast Cells.” PNAS.
National Academy of Sciences, 2016. https://doi.org/10.1073/pnas.1419248113.
ieee: P. Recouvreux, T. R. Sokolowski, A. Grammoustianou, P. Tenwolde, and M. Dogterom,
“Chimera proteins with affinity for membranes and microtubule tips polarize in
the membrane of fission yeast cells,” PNAS, vol. 113, no. 7. National Academy
of Sciences, pp. 1811–1816, 2016.
ista: Recouvreux P, Sokolowski TR, Grammoustianou A, Tenwolde P, Dogterom M. 2016.
Chimera proteins with affinity for membranes and microtubule tips polarize in
the membrane of fission yeast cells. PNAS. 113(7), 1811–1816.
mla: Recouvreux, Pierre, et al. “Chimera Proteins with Affinity for Membranes and
Microtubule Tips Polarize in the Membrane of Fission Yeast Cells.” PNAS,
vol. 113, no. 7, National Academy of Sciences, 2016, pp. 1811–16, doi:10.1073/pnas.1419248113.
short: P. Recouvreux, T.R. Sokolowski, A. Grammoustianou, P. Tenwolde, M. Dogterom,
PNAS 113 (2016) 1811–1816.
date_created: 2018-12-11T11:50:55Z
date_published: 2016-02-16T00:00:00Z
date_updated: 2025-09-22T09:15:17Z
day: '16'
department:
- _id: GaTk
doi: 10.1073/pnas.1419248113
external_id:
isi:
- '000370220000046'
intvolume: ' 113'
isi: 1
issue: '7'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4763754/
month: '02'
oa: 1
oa_version: Submitted Version
page: 1811 - 1816
publication: PNAS
publication_status: published
publisher: National Academy of Sciences
publist_id: '6085'
quality_controlled: '1'
scopus_import: '1'
status: public
title: Chimera proteins with affinity for membranes and microtubule tips polarize
in the membrane of fission yeast cells
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 113
year: '2016'
...
---
_id: '1245'
abstract:
- lang: eng
text: 'To facilitate collaboration in massive online classrooms, instructors must
make many decisions. For instance, the following parameters need to be decided
when designing a peer-feedback system where students review each others'' essays:
the number of students each student must provide feedback to, an algorithm to
map feedback providers to receivers, constraints that ensure students do not become
free-riders (receiving feedback but not providing it), the best times to receive
feedback to improve learning etc. While instructors can answer these questions
by running experiments or invoking past experience, game-theoretic models with
data from online learning platforms can identify better initial designs for further
improvements. As an example, we explore the design space of a peer feedback system
by modeling it using game theory. Our simulations show that incentivizing students
to provide feedback requires the value obtained from receiving a feedback to exceed
the cost of providing it by a large factor (greater than 7). Furthermore, hiding
feedback from low-effort students incentivizes them to provide more feedback.'
acknowledgement: 'ERC Start Grant Graph Games 279307 supported this research. '
article_processing_charge: No
author:
- first_name: Vineet
full_name: Pandey, Vineet
last_name: Pandey
- first_name: Krishnendu
full_name: Chatterjee, Krishnendu
id: 2E5DCA20-F248-11E8-B48F-1D18A9856A87
last_name: Chatterjee
orcid: 0000-0002-4561-241X
citation:
ama: 'Pandey V, Chatterjee K. Game-theoretic models identify useful principles for
peer collaboration in online learning platforms. In: Proceedings of the ACM
Conference on Computer Supported Cooperative Work. Vol 26. ACM; 2016:365-368.
doi:10.1145/2818052.2869122'
apa: 'Pandey, V., & Chatterjee, K. (2016). Game-theoretic models identify useful
principles for peer collaboration in online learning platforms. In Proceedings
of the ACM Conference on Computer Supported Cooperative Work (Vol. 26, pp.
365–368). San Francisco, CA, USA: ACM. https://doi.org/10.1145/2818052.2869122'
chicago: Pandey, Vineet, and Krishnendu Chatterjee. “Game-Theoretic Models Identify
Useful Principles for Peer Collaboration in Online Learning Platforms.” In Proceedings
of the ACM Conference on Computer Supported Cooperative Work, 26:365–68. ACM,
2016. https://doi.org/10.1145/2818052.2869122.
ieee: V. Pandey and K. Chatterjee, “Game-theoretic models identify useful principles
for peer collaboration in online learning platforms,” in Proceedings of the
ACM Conference on Computer Supported Cooperative Work, San Francisco, CA,
USA, 2016, vol. 26, no. Februar-2016, pp. 365–368.
ista: 'Pandey V, Chatterjee K. 2016. Game-theoretic models identify useful principles
for peer collaboration in online learning platforms. Proceedings of the ACM Conference
on Computer Supported Cooperative Work. CSCW: Computer Supported Cooperative Work
and Social Computing vol. 26, 365–368.'
mla: Pandey, Vineet, and Krishnendu Chatterjee. “Game-Theoretic Models Identify
Useful Principles for Peer Collaboration in Online Learning Platforms.” Proceedings
of the ACM Conference on Computer Supported Cooperative Work, vol. 26, no.
Februar-2016, ACM, 2016, pp. 365–68, doi:10.1145/2818052.2869122.
short: V. Pandey, K. Chatterjee, in:, Proceedings of the ACM Conference on Computer
Supported Cooperative Work, ACM, 2016, pp. 365–368.
conference:
end_date: 2016-03-02
location: San Francisco, CA, USA
name: 'CSCW: Computer Supported Cooperative Work and Social Computing'
start_date: 2016-02-26
date_created: 2018-12-11T11:50:55Z
date_published: 2016-02-27T00:00:00Z
date_updated: 2025-09-22T09:14:46Z
day: '27'
department:
- _id: KrCh
doi: 10.1145/2818052.2869122
ec_funded: 1
external_id:
isi:
- '000468137600088'
intvolume: ' 26'
isi: 1
issue: Februar-2016
language:
- iso: eng
month: '02'
oa_version: None
page: 365 - 368
project:
- _id: 2581B60A-B435-11E9-9278-68D0E5697425
call_identifier: FP7
grant_number: '279307'
name: 'Quantitative Graph Games: Theory and Applications'
publication: Proceedings of the ACM Conference on Computer Supported Cooperative Work
publication_status: published
publisher: ACM
publist_id: '6083'
quality_controlled: '1'
scopus_import: '1'
status: public
title: Game-theoretic models identify useful principles for peer collaboration in
online learning platforms
type: conference
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 26
year: '2016'
...
---
_id: '1246'
abstract:
- lang: eng
text: Near-field imaging is a powerful tool to investigate the complex structure
of light at the nanoscale. Recent advances in near-field imaging have indicated
the possibility for the complete reconstruction of both electric and magnetic
components of the evanescent field. Here we study the electro-magnetic field structure
of surface plasmon polariton waves propagating along subwavelength gold nanowires
by performing phase- and polarization-resolved near-field microscopy in collection
mode. By applying the optical reciprocity theorem, we describe the signal collected
by the probe as an overlap integral of the nanowire's evanescent field and the
probe's response function. As a result, we find that the probe's sensitivity to
the magnetic field is approximately equal to its sensitivity to the electric field.
Through rigorous modeling of the nanowire mode as well as the aperture probe response
function, we obtain a good agreement between experimentally measured signals and
a numerical model. Our findings provide a better understanding of aperture-based
near-field imaging of the nanoscopic plasmonic and photonic structures and are
helpful for the interpretation of future near-field experiments.
acknowledgement: 'This work is supported part of the research program of the Netherlands
Foundation for Fundamental Research on Matter (FOM) and the Netherlands Organization
for Scientific Research (NWO), and part of this work has been funded by the project
‘SPANGL4Q’, which acknowledges the financial support of the Future and Emerging
Technologies (FET) program within the Seventh Framework Programme for Research of
the European Commission, under FETOpen grant number: FP7-284743. L.K. acknowledges
funding from ERC Advanced, Investigator Grant (no. 240438-CONSTANS).'
article_number: '22665'
article_processing_charge: No
author:
- first_name: Irina
full_name: Kabakova, Irina
last_name: Kabakova
- first_name: Anouk
full_name: De Hoogh, Anouk
last_name: De Hoogh
- first_name: Ruben
full_name: Van Der Wel, Ruben
last_name: Van Der Wel
- first_name: Matthias
full_name: Wulf, Matthias
id: 45598606-F248-11E8-B48F-1D18A9856A87
last_name: Wulf
orcid: 0000-0001-6613-1378
- first_name: Boris
full_name: Le Feber, Boris
last_name: Le Feber
- first_name: Laurens
full_name: Kuipers, Laurens
last_name: Kuipers
citation:
ama: Kabakova I, De Hoogh A, Van Der Wel R, Wulf M, Le Feber B, Kuipers L. Imaging
of electric and magnetic fields near plasmonic nanowires. Scientific Reports.
2016;6. doi:10.1038/srep22665
apa: Kabakova, I., De Hoogh, A., Van Der Wel, R., Wulf, M., Le Feber, B., &
Kuipers, L. (2016). Imaging of electric and magnetic fields near plasmonic nanowires.
Scientific Reports. Nature Publishing Group. https://doi.org/10.1038/srep22665
chicago: Kabakova, Irina, Anouk De Hoogh, Ruben Van Der Wel, Matthias Wulf, Boris
Le Feber, and Laurens Kuipers. “Imaging of Electric and Magnetic Fields near Plasmonic
Nanowires.” Scientific Reports. Nature Publishing Group, 2016. https://doi.org/10.1038/srep22665.
ieee: I. Kabakova, A. De Hoogh, R. Van Der Wel, M. Wulf, B. Le Feber, and L. Kuipers,
“Imaging of electric and magnetic fields near plasmonic nanowires,” Scientific
Reports, vol. 6. Nature Publishing Group, 2016.
ista: Kabakova I, De Hoogh A, Van Der Wel R, Wulf M, Le Feber B, Kuipers L. 2016.
Imaging of electric and magnetic fields near plasmonic nanowires. Scientific Reports.
6, 22665.
mla: Kabakova, Irina, et al. “Imaging of Electric and Magnetic Fields near Plasmonic
Nanowires.” Scientific Reports, vol. 6, 22665, Nature Publishing Group,
2016, doi:10.1038/srep22665.
short: I. Kabakova, A. De Hoogh, R. Van Der Wel, M. Wulf, B. Le Feber, L. Kuipers,
Scientific Reports 6 (2016).
date_created: 2018-12-11T11:50:55Z
date_published: 2016-03-07T00:00:00Z
date_updated: 2025-09-22T09:14:06Z
day: '07'
ddc:
- '539'
department:
- _id: JoFi
doi: 10.1038/srep22665
external_id:
isi:
- '000371407500001'
file:
- access_level: open_access
checksum: ca76236cb1aae22cb90c65313e2c5e98
content_type: application/pdf
creator: system
date_created: 2018-12-12T10:14:11Z
date_updated: 2020-07-14T12:44:41Z
file_id: '5061'
file_name: IST-2016-707-v1+1_srep22665.pdf
file_size: 1425165
relation: main_file
file_date_updated: 2020-07-14T12:44:41Z
has_accepted_license: '1'
intvolume: ' 6'
isi: 1
language:
- iso: eng
month: '03'
oa: 1
oa_version: Published Version
publication: Scientific Reports
publication_status: published
publisher: Nature Publishing Group
publist_id: '6082'
pubrep_id: '707'
quality_controlled: '1'
scopus_import: '1'
status: public
title: Imaging of electric and magnetic fields near plasmonic nanowires
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 6
year: '2016'
...
---
_id: '1247'
abstract:
- lang: eng
text: The shaping of organs in plants depends on the intercellular flow of the phytohormone
auxin, of which the directional signaling is determined by the polar subcellular
localization of PIN-FORMED (PIN) auxin transport proteins. Phosphorylation dynamics
of PIN proteins are affected by the protein phosphatase 2A (PP2A) and the PINOID
kinase, which act antagonistically to mediate their apical-basal polar delivery.
Here, we identified the ROTUNDA3 (RON3) protein as a regulator of the PP2A phosphatase
activity in Arabidopsis thaliana. The RON3 gene was map-based cloned starting
from the ron3-1 leaf mutant and found to be a unique, plant-specific gene coding
for a protein with high and dispersed proline content. The ron3-1 and ron3-2 mutant
phenotypes [i.e., reduced apical dominance, primary root length, lateral root
emergence, and growth; increased ectopic stages II, IV, and V lateral root primordia;
decreased auxin maxima in indole-3-acetic acid (IAA)-treated root apical meristems;
hypergravitropic root growth and response; increased IAA levels in shoot apices;
and reduced auxin accumulation in root meristems] support a role for RON3 in auxin
biology. The affinity-purified PP2A complex with RON3 as bait suggested that RON3
might act in PIN transporter trafficking. Indeed, pharmacological interference
with vesicle trafficking processes revealed that single ron3-2 and double ron3-2
rcn1 mutants have altered PIN polarity and endocytosis in specific cells. Our
data indicate that RON3 contributes to auxin-mediated development by playing a
role in PIN recycling and polarity establishment through regulation of the PP2A
complex activity.
acknowledgement: "This work was supported by the Ghent University Special Research
Fund (M.K.), the European Research Council (Project ERC-2011-StG-20101109-PSDP)
(to J.F.), and the Körber European Science Foun-\r\ndation (J.F.). S.D.G. is indebted
to the Agency for Science and Technology for\r\na predoctoral fellowship."
article_processing_charge: No
author:
- first_name: Michael
full_name: Karampelias, Michael
last_name: Karampelias
- first_name: Pia
full_name: Neyt, Pia
last_name: Neyt
- first_name: Steven
full_name: De Groeve, Steven
last_name: De Groeve
- first_name: Stijn
full_name: Aesaert, Stijn
last_name: Aesaert
- first_name: Griet
full_name: Coussens, Griet
last_name: Coussens
- first_name: Jakub
full_name: Rolčík, Jakub
last_name: Rolčík
- first_name: Leonardo
full_name: Bruno, Leonardo
last_name: Bruno
- first_name: Nancy
full_name: De Winne, Nancy
last_name: De Winne
- first_name: Annemie
full_name: Van Minnebruggen, Annemie
last_name: Van Minnebruggen
- first_name: Marc
full_name: Van Montagu, Marc
last_name: Van Montagu
- first_name: Maria
full_name: Ponce, Maria
last_name: Ponce
- first_name: José
full_name: Micol, José
last_name: Micol
- first_name: Jirí
full_name: Friml, Jirí
id: 4159519E-F248-11E8-B48F-1D18A9856A87
last_name: Friml
orcid: 0000-0002-8302-7596
- first_name: Geert
full_name: De Jaeger, Geert
last_name: De Jaeger
- first_name: Mieke
full_name: Van Lijsebettens, Mieke
last_name: Van Lijsebettens
citation:
ama: Karampelias M, Neyt P, De Groeve S, et al. ROTUNDA3 function in plant development
by phosphatase 2A-mediated regulation of auxin transporter recycling. PNAS.
2016;113(10):2768-2773. doi:10.1073/pnas.1501343112
apa: Karampelias, M., Neyt, P., De Groeve, S., Aesaert, S., Coussens, G., Rolčík,
J., … Van Lijsebettens, M. (2016). ROTUNDA3 function in plant development by phosphatase
2A-mediated regulation of auxin transporter recycling. PNAS. National Academy
of Sciences. https://doi.org/10.1073/pnas.1501343112
chicago: Karampelias, Michael, Pia Neyt, Steven De Groeve, Stijn Aesaert, Griet
Coussens, Jakub Rolčík, Leonardo Bruno, et al. “ROTUNDA3 Function in Plant Development
by Phosphatase 2A-Mediated Regulation of Auxin Transporter Recycling.” PNAS.
National Academy of Sciences, 2016. https://doi.org/10.1073/pnas.1501343112.
ieee: M. Karampelias et al., “ROTUNDA3 function in plant development by phosphatase
2A-mediated regulation of auxin transporter recycling,” PNAS, vol. 113,
no. 10. National Academy of Sciences, pp. 2768–2773, 2016.
ista: Karampelias M, Neyt P, De Groeve S, Aesaert S, Coussens G, Rolčík J, Bruno
L, De Winne N, Van Minnebruggen A, Van Montagu M, Ponce M, Micol J, Friml J, De
Jaeger G, Van Lijsebettens M. 2016. ROTUNDA3 function in plant development by
phosphatase 2A-mediated regulation of auxin transporter recycling. PNAS. 113(10),
2768–2773.
mla: Karampelias, Michael, et al. “ROTUNDA3 Function in Plant Development by Phosphatase
2A-Mediated Regulation of Auxin Transporter Recycling.” PNAS, vol. 113,
no. 10, National Academy of Sciences, 2016, pp. 2768–73, doi:10.1073/pnas.1501343112.
short: M. Karampelias, P. Neyt, S. De Groeve, S. Aesaert, G. Coussens, J. Rolčík,
L. Bruno, N. De Winne, A. Van Minnebruggen, M. Van Montagu, M. Ponce, J. Micol,
J. Friml, G. De Jaeger, M. Van Lijsebettens, PNAS 113 (2016) 2768–2773.
date_created: 2018-12-11T11:50:56Z
date_published: 2016-03-08T00:00:00Z
date_updated: 2025-09-22T09:13:28Z
day: '08'
department:
- _id: JiFr
doi: 10.1073/pnas.1501343112
ec_funded: 1
external_id:
isi:
- '000372013300055'
intvolume: ' 113'
isi: 1
issue: '10'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4791031/
month: '03'
oa: 1
oa_version: Submitted Version
page: 2768 - 2773
project:
- _id: 25716A02-B435-11E9-9278-68D0E5697425
call_identifier: FP7
grant_number: '282300'
name: Polarity and subcellular dynamics in plants
publication: PNAS
publication_status: published
publisher: National Academy of Sciences
publist_id: '6081'
quality_controlled: '1'
scopus_import: '1'
status: public
title: ROTUNDA3 function in plant development by phosphatase 2A-mediated regulation
of auxin transporter recycling
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 113
year: '2016'
...
---
_id: '1248'
abstract:
- lang: eng
text: Life depends as much on the flow of information as on the flow of energy.
Here we review the many efforts to make this intuition precise. Starting with
the building blocks of information theory, we explore examples where it has been
possible to measure, directly, the flow of information in biological networks,
or more generally where information-theoretic ideas have been used to guide the
analysis of experiments. Systems of interest range from single molecules (the
sequence diversity in families of proteins) to groups of organisms (the distribution
of velocities in flocks of birds), and all scales in between. Many of these analyses
are motivated by the idea that biological systems may have evolved to optimize
the gathering and representation of information, and we review the experimental
evidence for this optimization, again across a wide range of scales.
acknowledgement: "Our work was supported in part by the US\r\nNational Science Foundation
(PHY–1305525 and CCF–\r\n0939370), by the Austrian Science Foundation (FWF\r\nP25651),
by the Human Frontiers Science Program, and\r\nby the Simons and Swartz Foundations."
article_processing_charge: No
arxiv: 1
author:
- first_name: Gasper
full_name: Tkacik, Gasper
id: 3D494DCA-F248-11E8-B48F-1D18A9856A87
last_name: Tkacik
orcid: 0000-0002-6699-1455
- first_name: William
full_name: Bialek, William
last_name: Bialek
citation:
ama: Tkačik G, Bialek W. Information processing in living systems. Annual Review
of Condensed Matter Physics. 2016;7:89-117. doi:10.1146/annurev-conmatphys-031214-014803
apa: Tkačik, G., & Bialek, W. (2016). Information processing in living systems.
Annual Review of Condensed Matter Physics. Annual Reviews. https://doi.org/10.1146/annurev-conmatphys-031214-014803
chicago: Tkačik, Gašper, and William Bialek. “Information Processing in Living Systems.”
Annual Review of Condensed Matter Physics. Annual Reviews, 2016. https://doi.org/10.1146/annurev-conmatphys-031214-014803.
ieee: G. Tkačik and W. Bialek, “Information processing in living systems,” Annual
Review of Condensed Matter Physics, vol. 7. Annual Reviews, pp. 89–117, 2016.
ista: Tkačik G, Bialek W. 2016. Information processing in living systems. Annual
Review of Condensed Matter Physics. 7, 89–117.
mla: Tkačik, Gašper, and William Bialek. “Information Processing in Living Systems.”
Annual Review of Condensed Matter Physics, vol. 7, Annual Reviews, 2016,
pp. 89–117, doi:10.1146/annurev-conmatphys-031214-014803.
short: G. Tkačik, W. Bialek, Annual Review of Condensed Matter Physics 7 (2016)
89–117.
date_created: 2018-12-11T11:50:56Z
date_published: 2016-03-10T00:00:00Z
date_updated: 2025-09-22T09:12:56Z
day: '10'
department:
- _id: GaTk
doi: 10.1146/annurev-conmatphys-031214-014803
external_id:
arxiv:
- '1412.8752'
isi:
- '000372188500005'
intvolume: ' 7'
isi: 1
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/abs/1412.8752
month: '03'
oa: 1
oa_version: Preprint
page: 89 - 117
project:
- _id: 254D1A94-B435-11E9-9278-68D0E5697425
call_identifier: FWF
grant_number: P 25651-N26
name: Sensitivity to higher-order statistics in natural scenes
publication: Annual Review of Condensed Matter Physics
publication_status: published
publisher: Annual Reviews
publist_id: '6080'
quality_controlled: '1'
scopus_import: '1'
status: public
title: Information processing in living systems
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 7
year: '2016'
...
---
_id: '1249'
abstract:
- lang: eng
text: 'Actin and myosin assemble into a thin layer of a highly dynamic network underneath
the membrane of eukaryotic cells. This network generates the forces that drive
cell- and tissue-scale morphogenetic processes. The effective material properties
of this active network determine large-scale deformations and other morphogenetic
events. For example, the characteristic time of stress relaxation (the Maxwell
time τM) in the actomyosin sets the timescale of large-scale deformation of the
cortex. Similarly, the characteristic length of stress propagation (the hydrodynamic
length λ) sets the length scale of slow deformations, and a large hydrodynamic
length is a prerequisite for long-ranged cortical flows. Here we introduce a method
to determine physical parameters of the actomyosin cortical layer in vivo directly
from laser ablation experiments. For this we investigate the cortical response
to laser ablation in the one-cell-stage Caenorhabditis elegans embryo and in the
gastrulating zebrafish embryo. These responses can be interpreted using a coarse-grained
physical description of the cortex in terms of a two-dimensional thin film of
an active viscoelastic gel. To determine the Maxwell time τM, the hydrodynamic
length λ, the ratio of active stress ζΔμ, and per-area friction γ, we evaluated
the response to laser ablation in two different ways: by quantifying flow and
density fields as a function of space and time, and by determining the time evolution
of the shape of the ablated region. Importantly, both methods provide best-fit
physical parameters that are in close agreement with each other and that are similar
to previous estimates in the two systems. Our method provides an accurate and
robust means for measuring physical parameters of the actomyosin cortical layer.
It can be useful for investigations of actomyosin mechanics at the cellular-scale,
but also for providing insights into the active mechanics processes that govern
tissue-scale morphogenesis.'
acknowledgement: S.W.G. acknowledges support by grant no. 281903 from the European
Research Council and by grant No. GR-7271/2-1 from the Deutsche Forschungsgemeinschaft.
S.W.G. and C.-P.H. acknowledge support through a grant from the Fonds zur Förderung
der Wissenschaftlichen Forschung and the Deutsche Forschungsgemeinschaft (No. I930-B20).
We are grateful to Daniel Dickinson for providing the LP133 C. elegans strain. We
thank G. Salbreux, V. K. Krishnamurthy, and J. S. Bois for fruitful discussions.
article_processing_charge: No
author:
- first_name: Arnab
full_name: Saha, Arnab
last_name: Saha
- first_name: Masatoshi
full_name: Nishikawa, Masatoshi
last_name: Nishikawa
- first_name: Martin
full_name: Behrndt, Martin
id: 3ECECA3A-F248-11E8-B48F-1D18A9856A87
last_name: Behrndt
- first_name: Carl-Philipp J
full_name: Heisenberg, Carl-Philipp J
id: 39427864-F248-11E8-B48F-1D18A9856A87
last_name: Heisenberg
orcid: 0000-0002-0912-4566
- first_name: Frank
full_name: Julicher, Frank
last_name: Julicher
- first_name: Stephan
full_name: Grill, Stephan
last_name: Grill
citation:
ama: Saha A, Nishikawa M, Behrndt M, Heisenberg C-PJ, Julicher F, Grill S. Determining
physical properties of the cell cortex. Biophysical Journal. 2016;110(6):1421-1429.
doi:10.1016/j.bpj.2016.02.013
apa: Saha, A., Nishikawa, M., Behrndt, M., Heisenberg, C.-P. J., Julicher, F., &
Grill, S. (2016). Determining physical properties of the cell cortex. Biophysical
Journal. Biophysical Society. https://doi.org/10.1016/j.bpj.2016.02.013
chicago: Saha, Arnab, Masatoshi Nishikawa, Martin Behrndt, Carl-Philipp J Heisenberg,
Frank Julicher, and Stephan Grill. “Determining Physical Properties of the Cell
Cortex.” Biophysical Journal. Biophysical Society, 2016. https://doi.org/10.1016/j.bpj.2016.02.013.
ieee: A. Saha, M. Nishikawa, M. Behrndt, C.-P. J. Heisenberg, F. Julicher, and S.
Grill, “Determining physical properties of the cell cortex,” Biophysical Journal,
vol. 110, no. 6. Biophysical Society, pp. 1421–1429, 2016.
ista: Saha A, Nishikawa M, Behrndt M, Heisenberg C-PJ, Julicher F, Grill S. 2016.
Determining physical properties of the cell cortex. Biophysical Journal. 110(6),
1421–1429.
mla: Saha, Arnab, et al. “Determining Physical Properties of the Cell Cortex.” Biophysical
Journal, vol. 110, no. 6, Biophysical Society, 2016, pp. 1421–29, doi:10.1016/j.bpj.2016.02.013.
short: A. Saha, M. Nishikawa, M. Behrndt, C.-P.J. Heisenberg, F. Julicher, S. Grill,
Biophysical Journal 110 (2016) 1421–1429.
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