---
_id: '8510'
abstract:
- lang: eng
  text: In this paper, using the ideas of Bessi and Mather, we present a simple mechanical
    system exhibiting Arnold diffusion. This system of a particle in a small periodic
    potential can be also interpreted as ray propagation in a periodic optical medium
    with a near-constant index of refraction. Arnold diffusion in this context manifests
    itself as an arbitrary finite change of direction for nearly constant index of
    refraction.
article_processing_charge: No
article_type: original
author:
- first_name: Vadim
  full_name: Kaloshin, Vadim
  id: FE553552-CDE8-11E9-B324-C0EBE5697425
  last_name: Kaloshin
  orcid: 0000-0002-6051-2628
- first_name: Mark
  full_name: Levi, Mark
  last_name: Levi
citation:
  ama: Kaloshin V, Levi M. An example of Arnold diffusion for near-integrable Hamiltonians.
    <i>Bulletin of the American Mathematical Society</i>. 2008;45(3):409-427. doi:<a
    href="https://doi.org/10.1090/s0273-0979-08-01211-1">10.1090/s0273-0979-08-01211-1</a>
  apa: Kaloshin, V., &#38; Levi, M. (2008). An example of Arnold diffusion for near-integrable
    Hamiltonians. <i>Bulletin of the American Mathematical Society</i>. American Mathematical
    Society. <a href="https://doi.org/10.1090/s0273-0979-08-01211-1">https://doi.org/10.1090/s0273-0979-08-01211-1</a>
  chicago: Kaloshin, Vadim, and Mark Levi. “An Example of Arnold Diffusion for Near-Integrable
    Hamiltonians.” <i>Bulletin of the American Mathematical Society</i>. American
    Mathematical Society, 2008. <a href="https://doi.org/10.1090/s0273-0979-08-01211-1">https://doi.org/10.1090/s0273-0979-08-01211-1</a>.
  ieee: V. Kaloshin and M. Levi, “An example of Arnold diffusion for near-integrable
    Hamiltonians,” <i>Bulletin of the American Mathematical Society</i>, vol. 45,
    no. 3. American Mathematical Society, pp. 409–427, 2008.
  ista: Kaloshin V, Levi M. 2008. An example of Arnold diffusion for near-integrable
    Hamiltonians. Bulletin of the American Mathematical Society. 45(3), 409–427.
  mla: Kaloshin, Vadim, and Mark Levi. “An Example of Arnold Diffusion for Near-Integrable
    Hamiltonians.” <i>Bulletin of the American Mathematical Society</i>, vol. 45,
    no. 3, American Mathematical Society, 2008, pp. 409–27, doi:<a href="https://doi.org/10.1090/s0273-0979-08-01211-1">10.1090/s0273-0979-08-01211-1</a>.
  short: V. Kaloshin, M. Levi, Bulletin of the American Mathematical Society 45 (2008)
    409–427.
date_created: 2020-09-18T10:48:20Z
date_published: 2008-07-01T00:00:00Z
date_updated: 2021-01-12T08:19:47Z
day: '01'
doi: 10.1090/s0273-0979-08-01211-1
extern: '1'
intvolume: '        45'
issue: '3'
keyword:
- Applied Mathematics
- General Mathematics
language:
- iso: eng
month: '07'
oa_version: None
page: 409-427
publication: Bulletin of the American Mathematical Society
publication_identifier:
  issn:
  - 0273-0979
publication_status: published
publisher: American Mathematical Society
quality_controlled: '1'
status: public
title: An example of Arnold diffusion for near-integrable Hamiltonians
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 45
year: '2008'
...
---
_id: '895'
abstract:
- lang: eng
  text: Background. The arginine vasopressin V1a receptor (V1aR) modulates social
    cognition and behavior in a wide variety of species. Variation in a repetitive
    microsatellite element in the 5′ flanking region of the V1aR gene (AVPR1A) in
    rodents has been associated with variation in brain V1aR expression and in social
    behavior. In humans, the 5′ flanking region of AVPR1A contains a tandem duplication
    of two ∼350 bp, microsatellite-containing elements located approximately 3.5 kb
    upstream of the transcription start site. The first block, referred to as DupA,
    contains a polymorphic (GT) 25microsatellite; the second block, DupB, has a complex
    (CT) 4-(TT)-(CT)8-(GT)24polymorphic motif, known as RS3. Polymorphisms in RS3
    have been associated with variation in sociobehavioral traits in humans, including
    autism spectrum disorders. Thus, evolution of these regions may have contributed
    to variation in social behavior in primates. We examined the structure of these
    regions in six ape, six monkey, and one prosimian species. Results. Both tandem
    repeat blocks are present upstream of the AVPR1A coding region in five of the
    ape species we investigated, while monkeys have only one copy of this region.
    As in humans, the microsatellites within DupA and DupB are polymorphic in many
    primate species. Furthermore, both single (lacking DupB) and duplicated alleles
    (containing both DupA and DupB) are present in chimpanzee (Pan troglodytes) populations
    with allele frequencies of 0.795 and 0.205 for the single and duplicated alleles,
    respectively, based on the analysis of 47 wild-caught individuals. Finally, a
    phylogenetic reconstruction suggests two alternate evolutionary histories for
    this locus. Conclusion. There is no obvious relationship between the presence
    of the RS3 duplication and social organization in primates. However, polymorphisms
    identified in some species may be useful in future genetic association studies.
    In particular, the presence of both single and duplicated alleles in chimpanzees
    provides a unique opportunity to assess the functional role of this duplication
    in contributing to variation in social behavior in primates. While our initial
    studies show no signs of directional selection on this locus in chimps, pharmacological
    and genetic association studies support a potential role for this region in influencing
    V1aR expression and social behavior.
acknowledgement: |
  We thank the caretakers at Zoo Atlanta and Yerkes National Primate Center for help with procuring specimens. Additional DNA samples were supplied by Bill Hopkins, Emory University (chimpanzee), Allyson Bennet, Wake Forest University (chimpanzee, rhesus macaque, bonnet macaque), Mar Sanchez, Emory University (rhesus macaque), and Anne Yoder, Duke University (galago). Susan Lambeth, M.D. Anderson Cancer Center, and Katie Chace, Yerkes National Primate Center, helped provide records regarding the origins of wild born chimps at these centers. We would like to thank Dr Lisa McGraw and two anonymous reviewers for their com- ments on this manuscript. This work was supported by NSF IBN-9876754, NIH RR00165, NIMH56897 (LJY), MH64692 (LJY) and a Howard Hughes Predoctoral Fellowship (ZRD).
author:
- first_name: Zoe
  full_name: Donaldson, Zoe R
  last_name: Donaldson
- first_name: Fyodor
  full_name: Fyodor Kondrashov
  id: 44FDEF62-F248-11E8-B48F-1D18A9856A87
  last_name: Kondrashov
  orcid: 0000-0001-8243-4694
- first_name: Andrea
  full_name: Putnam, Andrea S
  last_name: Putnam
- first_name: Yaohui
  full_name: Bai, Yaohui
  last_name: Bai
- first_name: Tara
  full_name: Stoinski, Tara S
  last_name: Stoinski
- first_name: Elizabeth
  full_name: Hammock, Elizabeth A
  last_name: Hammock
- first_name: Larry
  full_name: Young, Larry
  last_name: Young
citation:
  ama: Donaldson Z, Kondrashov F, Putnam A, et al. Evolution of a behavior-linked
    microsatellite-containing element in the 5′ flanking region of the primate AVPR1A
    gene. <i>BMC Evolutionary Biology</i>. 2008;8(1). doi:<a href="https://doi.org/10.1186/1471-2148-8-180">10.1186/1471-2148-8-180</a>
  apa: Donaldson, Z., Kondrashov, F., Putnam, A., Bai, Y., Stoinski, T., Hammock,
    E., &#38; Young, L. (2008). Evolution of a behavior-linked microsatellite-containing
    element in the 5′ flanking region of the primate AVPR1A gene. <i>BMC Evolutionary
    Biology</i>. BioMed Central. <a href="https://doi.org/10.1186/1471-2148-8-180">https://doi.org/10.1186/1471-2148-8-180</a>
  chicago: Donaldson, Zoe, Fyodor Kondrashov, Andrea Putnam, Yaohui Bai, Tara Stoinski,
    Elizabeth Hammock, and Larry Young. “Evolution of a Behavior-Linked Microsatellite-Containing
    Element in the 5′ Flanking Region of the Primate AVPR1A Gene.” <i>BMC Evolutionary
    Biology</i>. BioMed Central, 2008. <a href="https://doi.org/10.1186/1471-2148-8-180">https://doi.org/10.1186/1471-2148-8-180</a>.
  ieee: Z. Donaldson <i>et al.</i>, “Evolution of a behavior-linked microsatellite-containing
    element in the 5′ flanking region of the primate AVPR1A gene,” <i>BMC Evolutionary
    Biology</i>, vol. 8, no. 1. BioMed Central, 2008.
  ista: Donaldson Z, Kondrashov F, Putnam A, Bai Y, Stoinski T, Hammock E, Young L.
    2008. Evolution of a behavior-linked microsatellite-containing element in the
    5′ flanking region of the primate AVPR1A gene. BMC Evolutionary Biology. 8(1).
  mla: Donaldson, Zoe, et al. “Evolution of a Behavior-Linked Microsatellite-Containing
    Element in the 5′ Flanking Region of the Primate AVPR1A Gene.” <i>BMC Evolutionary
    Biology</i>, vol. 8, no. 1, BioMed Central, 2008, doi:<a href="https://doi.org/10.1186/1471-2148-8-180">10.1186/1471-2148-8-180</a>.
  short: Z. Donaldson, F. Kondrashov, A. Putnam, Y. Bai, T. Stoinski, E. Hammock,
    L. Young, BMC Evolutionary Biology 8 (2008).
date_created: 2018-12-11T11:49:04Z
date_published: 2008-01-01T00:00:00Z
date_updated: 2021-01-12T08:21:29Z
day: '01'
doi: 10.1186/1471-2148-8-180
extern: 1
intvolume: '         8'
issue: '1'
month: '01'
publication: BMC Evolutionary Biology
publication_status: published
publisher: BioMed Central
publist_id: '6753'
quality_controlled: 0
status: public
title: Evolution of a behavior-linked microsatellite-containing element in the 5′
  flanking region of the primate AVPR1A gene
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
volume: 8
year: '2008'
...
---
_id: '907'
abstract:
- lang: eng
  text: The most common form of protein-coding gene overlap in eukaryotes is a simple
    nested structure, whereby one gene is embedded in an intron of another. Analysis
    of nested protein-coding genes in vertebrates, fruit flies and nematodes revealed
    substantially higher rates of evolutionary gains than losses. The accumulation
    of nested gene structures could not be attributed to any obvious functional relationships
    between the genes involved and represents an increase of the organizational complexity
    of animal genomes via a neutral process.
author:
- first_name: Raquel
  full_name: Assis, Raquel
  last_name: Assis
- first_name: Alexey
  full_name: Kondrashov, Alexey S
  last_name: Kondrashov
- first_name: Eugene
  full_name: Koonin, Eugene V
  last_name: Koonin
- first_name: Fyodor
  full_name: Fyodor Kondrashov
  id: 44FDEF62-F248-11E8-B48F-1D18A9856A87
  last_name: Kondrashov
  orcid: 0000-0001-8243-4694
citation:
  ama: Assis R, Kondrashov A, Koonin E, Kondrashov F. Nested genes and increasing
    organizational complexity of metazoan genomes. <i>Trends in Genetics</i>. 2008;24(10):475-478.
    doi:<a href="https://doi.org/10.1016/j.tig.2008.08.003">10.1016/j.tig.2008.08.003</a>
  apa: Assis, R., Kondrashov, A., Koonin, E., &#38; Kondrashov, F. (2008). Nested
    genes and increasing organizational complexity of metazoan genomes. <i>Trends
    in Genetics</i>. Elsevier. <a href="https://doi.org/10.1016/j.tig.2008.08.003">https://doi.org/10.1016/j.tig.2008.08.003</a>
  chicago: Assis, Raquel, Alexey Kondrashov, Eugene Koonin, and Fyodor Kondrashov.
    “Nested Genes and Increasing Organizational Complexity of Metazoan Genomes.” <i>Trends
    in Genetics</i>. Elsevier, 2008. <a href="https://doi.org/10.1016/j.tig.2008.08.003">https://doi.org/10.1016/j.tig.2008.08.003</a>.
  ieee: R. Assis, A. Kondrashov, E. Koonin, and F. Kondrashov, “Nested genes and increasing
    organizational complexity of metazoan genomes,” <i>Trends in Genetics</i>, vol.
    24, no. 10. Elsevier, pp. 475–478, 2008.
  ista: Assis R, Kondrashov A, Koonin E, Kondrashov F. 2008. Nested genes and increasing
    organizational complexity of metazoan genomes. Trends in Genetics. 24(10), 475–478.
  mla: Assis, Raquel, et al. “Nested Genes and Increasing Organizational Complexity
    of Metazoan Genomes.” <i>Trends in Genetics</i>, vol. 24, no. 10, Elsevier, 2008,
    pp. 475–78, doi:<a href="https://doi.org/10.1016/j.tig.2008.08.003">10.1016/j.tig.2008.08.003</a>.
  short: R. Assis, A. Kondrashov, E. Koonin, F. Kondrashov, Trends in Genetics 24
    (2008) 475–478.
date_created: 2018-12-11T11:49:08Z
date_published: 2008-10-01T00:00:00Z
date_updated: 2021-01-12T08:21:49Z
day: '01'
doi: 10.1016/j.tig.2008.08.003
extern: 1
intvolume: '        24'
issue: '10'
month: '10'
page: 475 - 478
publication: Trends in Genetics
publication_status: published
publisher: Elsevier
publist_id: '6743'
quality_controlled: 0
status: public
title: Nested genes and increasing organizational complexity of metazoan genomes
type: journal_article
volume: 24
year: '2008'
...
---
_id: '9457'
abstract:
- lang: eng
  text: Eukaryotic chromatin is separated into functional domains differentiated by
    posttranslational histone modifications, histone variants, and DNA methylation1–6.
    Methylation is associated with repression of transcriptional initiation in plants
    and animals, and is frequently found in transposable elements. Proper methylation
    patterns are critical for eukaryotic development4,5, and aberrant methylation-induced
    silencing of tumor suppressor genes is a common feature of human cancer7. In contrast
    to methylation, the histone variant H2A.Z is preferentially deposited by the Swr1
    ATPase complex near 5′ ends of genes where it promotes transcriptional competence8–20.
    How DNA methylation and H2A.Z influence transcription remains largely unknown.
    Here we show that in the plant Arabidopsis thaliana, regions of DNA methylation
    are quantitatively deficient in H2A.Z. Exclusion of H2A.Z is seen at sites of
    DNA methylation in the bodies of actively transcribed genes and in methylated
    transposons. Mutation of the MET1 DNA methyltransferase, which causes both losses
    and gains of DNA methylation4,5, engenders opposite changes in H2A.Z deposition,
    while mutation of the PIE1 subunit of the Swr1 complex that deposits H2A.Z17 leads
    to genome-wide hypermethylation. Our findings indicate that DNA methylation can
    influence chromatin structure and effect gene silencing by excluding H2A.Z, and
    that H2A.Z protects genes from DNA methylation.
article_processing_charge: No
article_type: letter_note
author:
- first_name: Daniel
  full_name: Zilberman, Daniel
  id: 6973db13-dd5f-11ea-814e-b3e5455e9ed1
  last_name: Zilberman
  orcid: 0000-0002-0123-8649
- first_name: Devin
  full_name: Coleman-Derr, Devin
  last_name: Coleman-Derr
- first_name: Tracy
  full_name: Ballinger, Tracy
  last_name: Ballinger
- first_name: Steven
  full_name: Henikoff, Steven
  last_name: Henikoff
citation:
  ama: Zilberman D, Coleman-Derr D, Ballinger T, Henikoff S. Histone H2A.Z and DNA
    methylation are mutually antagonistic chromatin marks. <i>Nature</i>. 2008;456(7218):125-129.
    doi:<a href="https://doi.org/10.1038/nature07324">10.1038/nature07324</a>
  apa: Zilberman, D., Coleman-Derr, D., Ballinger, T., &#38; Henikoff, S. (2008).
    Histone H2A.Z and DNA methylation are mutually antagonistic chromatin marks. <i>Nature</i>.
    Springer Nature. <a href="https://doi.org/10.1038/nature07324">https://doi.org/10.1038/nature07324</a>
  chicago: Zilberman, Daniel, Devin Coleman-Derr, Tracy Ballinger, and Steven Henikoff.
    “Histone H2A.Z and DNA Methylation Are Mutually Antagonistic Chromatin Marks.”
    <i>Nature</i>. Springer Nature, 2008. <a href="https://doi.org/10.1038/nature07324">https://doi.org/10.1038/nature07324</a>.
  ieee: D. Zilberman, D. Coleman-Derr, T. Ballinger, and S. Henikoff, “Histone H2A.Z
    and DNA methylation are mutually antagonistic chromatin marks,” <i>Nature</i>,
    vol. 456, no. 7218. Springer Nature, pp. 125–129, 2008.
  ista: Zilberman D, Coleman-Derr D, Ballinger T, Henikoff S. 2008. Histone H2A.Z
    and DNA methylation are mutually antagonistic chromatin marks. Nature. 456(7218),
    125–129.
  mla: Zilberman, Daniel, et al. “Histone H2A.Z and DNA Methylation Are Mutually Antagonistic
    Chromatin Marks.” <i>Nature</i>, vol. 456, no. 7218, Springer Nature, 2008, pp.
    125–29, doi:<a href="https://doi.org/10.1038/nature07324">10.1038/nature07324</a>.
  short: D. Zilberman, D. Coleman-Derr, T. Ballinger, S. Henikoff, Nature 456 (2008)
    125–129.
date_created: 2021-06-04T11:49:32Z
date_published: 2008-11-06T00:00:00Z
date_updated: 2021-12-14T08:54:36Z
day: '06'
department:
- _id: DaZi
doi: 10.1038/nature07324
extern: '1'
external_id:
  pmid:
  - '18815594'
intvolume: '       456'
issue: '7218'
keyword:
- Multidisciplinary
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2877514/
month: '11'
oa: 1
oa_version: Submitted Version
page: 125-129
pmid: 1
publication: Nature
publication_identifier:
  eissn:
  - 1476-4687
  issn:
  - 0028-0836
publication_status: published
publisher: Springer Nature
quality_controlled: '1'
scopus_import: '1'
status: public
title: Histone H2A.Z and DNA methylation are mutually antagonistic chromatin marks
type: journal_article
user_id: 8b945eb4-e2f2-11eb-945a-df72226e66a9
volume: 456
year: '2008'
...
---
_id: '9537'
abstract:
- lang: eng
  text: DNA methylation is an ancient process found in all domains of life. Although
    the enzymes that mediate methylation have remained highly conserved, DNA methylation
    has been adapted for a variety of uses throughout evolution, including defense
    against transposable elements and control of gene expression. Defects in DNA methylation
    are linked to human diseases, including cancer. Methylation has been lost several
    times in the course of animal and fungal evolution, thus limiting the opportunity
    for study in common model organisms. In the past decade, plants have emerged as
    a premier model system for genetic dissection of DNA methylation. A recent combination
    of plant genetics with powerful genomic approaches has led to a number of exciting
    discoveries and promises many more.
article_processing_charge: No
article_type: review
author:
- first_name: Daniel
  full_name: Zilberman, Daniel
  id: 6973db13-dd5f-11ea-814e-b3e5455e9ed1
  last_name: Zilberman
  orcid: 0000-0002-0123-8649
citation:
  ama: Zilberman D. The evolving functions of DNA methylation. <i>Current Opinion
    in Plant Biology</i>. 2008;11(5):554-559. doi:<a href="https://doi.org/10.1016/j.pbi.2008.07.004">10.1016/j.pbi.2008.07.004</a>
  apa: Zilberman, D. (2008). The evolving functions of DNA methylation. <i>Current
    Opinion in Plant Biology</i>. Elsevier . <a href="https://doi.org/10.1016/j.pbi.2008.07.004">https://doi.org/10.1016/j.pbi.2008.07.004</a>
  chicago: Zilberman, Daniel. “The Evolving Functions of DNA Methylation.” <i>Current
    Opinion in Plant Biology</i>. Elsevier , 2008. <a href="https://doi.org/10.1016/j.pbi.2008.07.004">https://doi.org/10.1016/j.pbi.2008.07.004</a>.
  ieee: D. Zilberman, “The evolving functions of DNA methylation,” <i>Current Opinion
    in Plant Biology</i>, vol. 11, no. 5. Elsevier , pp. 554–559, 2008.
  ista: Zilberman D. 2008. The evolving functions of DNA methylation. Current Opinion
    in Plant Biology. 11(5), 554–559.
  mla: Zilberman, Daniel. “The Evolving Functions of DNA Methylation.” <i>Current
    Opinion in Plant Biology</i>, vol. 11, no. 5, Elsevier , 2008, pp. 554–59, doi:<a
    href="https://doi.org/10.1016/j.pbi.2008.07.004">10.1016/j.pbi.2008.07.004</a>.
  short: D. Zilberman, Current Opinion in Plant Biology 11 (2008) 554–559.
date_created: 2021-06-08T13:13:37Z
date_published: 2008-10-01T00:00:00Z
date_updated: 2021-12-14T08:54:07Z
department:
- _id: DaZi
doi: 10.1016/j.pbi.2008.07.004
extern: '1'
external_id:
  pmid:
  - '18774331'
intvolume: '        11'
issue: '5'
language:
- iso: eng
month: '10'
oa_version: None
page: 554-559
pmid: 1
publication: Current Opinion in Plant Biology
publication_identifier:
  issn:
  - 1369-5266
publication_status: published
publisher: 'Elsevier '
quality_controlled: '1'
scopus_import: '1'
status: public
title: The evolving functions of DNA methylation
type: journal_article
user_id: 8b945eb4-e2f2-11eb-945a-df72226e66a9
volume: 11
year: '2008'
...
---
_id: '965'
abstract:
- lang: eng
  text: We give many examples of applying Bogoliubov's forest formula to iterative
    solutions of various nonlinear equations. The same formula describes an extremely
    wide class of objects, from an ordinary quadratic equation to renormalization
    in quantum field theory.
acknowledgement: |-
  This work is supported in part by the Dynasty Foundation (M. N. S.),  the
  Russian Foundation for Basic Research (Grant No
  s. 07-02-00878 and 07-02-00645), a joint grant (Grant
  No. 06-01-92059-CE), the NWO (Project No. 047.011.2004.026), INTAS (Grant No. 05-1000008-7865), the
  Program for Supporting Leading Scientific School
  s (Grant No. NSh-8004.2006.2), and also by a project
  (Project No. ANR-05-BLAN-0029-01, A. Yu. M.).
author:
- first_name: Alexei
  full_name: Morozov, Alexei Y
  last_name: Morozov
- first_name: Maksym
  full_name: Maksym Serbyn
  id: 47809E7E-F248-11E8-B48F-1D18A9856A87
  last_name: Serbyn
  orcid: 0000-0002-2399-5827
citation:
  ama: Morozov A, Serbyn M. Nonlinear algebra and Bogoliubov’s recursion. <i>Theoretical
    and Mathematical Physics</i>. 2008;154(2):270-293. doi:<a href="https://doi.org/10.1007/s11232-008-0026-7">10.1007/s11232-008-0026-7</a>
  apa: Morozov, A., &#38; Serbyn, M. (2008). Nonlinear algebra and Bogoliubov’s recursion.
    <i>Theoretical and Mathematical Physics</i>. Elsevier. <a href="https://doi.org/10.1007/s11232-008-0026-7">https://doi.org/10.1007/s11232-008-0026-7</a>
  chicago: Morozov, Alexei, and Maksym Serbyn. “Nonlinear Algebra and Bogoliubov’s
    Recursion.” <i>Theoretical and Mathematical Physics</i>. Elsevier, 2008. <a href="https://doi.org/10.1007/s11232-008-0026-7">https://doi.org/10.1007/s11232-008-0026-7</a>.
  ieee: A. Morozov and M. Serbyn, “Nonlinear algebra and Bogoliubov’s recursion,”
    <i>Theoretical and Mathematical Physics</i>, vol. 154, no. 2. Elsevier, pp. 270–293,
    2008.
  ista: Morozov A, Serbyn M. 2008. Nonlinear algebra and Bogoliubov’s recursion. Theoretical
    and Mathematical Physics. 154(2), 270–293.
  mla: Morozov, Alexei, and Maksym Serbyn. “Nonlinear Algebra and Bogoliubov’s Recursion.”
    <i>Theoretical and Mathematical Physics</i>, vol. 154, no. 2, Elsevier, 2008,
    pp. 270–93, doi:<a href="https://doi.org/10.1007/s11232-008-0026-7">10.1007/s11232-008-0026-7</a>.
  short: A. Morozov, M. Serbyn, Theoretical and Mathematical Physics 154 (2008) 270–293.
date_created: 2018-12-11T11:49:26Z
date_published: 2008-01-01T00:00:00Z
date_updated: 2021-01-12T08:22:17Z
day: '01'
doi: 10.1007/s11232-008-0026-7
extern: 1
intvolume: '       154'
issue: '2'
main_file_link:
- open_access: '1'
  url: https://arxiv.org/abs/hep-th/0703258
month: '01'
oa: 1
page: 270 - 293
publication: Theoretical and Mathematical Physics
publication_status: published
publisher: Elsevier
publist_id: '6437'
quality_controlled: 0
status: public
title: Nonlinear algebra and Bogoliubov's recursion
type: journal_article
volume: 154
year: '2008'
...
---
_id: '581'
abstract:
- lang: eng
  text: We have detected a spin-dependent displacement perpendicular to the refractive
    index gradient for photons passing through an air-glass interface. The effect
    is the photonic version of the spin Hall effect in electronic systems, indicating
    the universality of the effect for particles of different nature. Treating the
    effect as a weak measurement of the spin projection of the photons, we used a
    preselection and postselection technique on the spin state to enhance the original
    displacement by nearly four orders of magnitude, attaining sensitivity to displacements
    of ∼1 angstrom. The spin Hall effect can be used for manipulating photonic angular
    momentum states, and the measurement technique holds promise for precision metrology.
author:
- first_name: Onur
  full_name: Onur Hosten
  id: 4C02D85E-F248-11E8-B48F-1D18A9856A87
  last_name: Hosten
  orcid: 0000-0002-2031-204X
- first_name: Paul
  full_name: Kwiat, Paul
  last_name: Kwiat
citation:
  ama: Hosten O, Kwiat P. Observation of the spin hall effect of light via weak measurements.
    <i>Science</i>. 2008;319(5864):787-790. doi:<a href="https://doi.org/10.1126/science.1152697">10.1126/science.1152697</a>
  apa: Hosten, O., &#38; Kwiat, P. (2008). Observation of the spin hall effect of
    light via weak measurements. <i>Science</i>. American Association for the Advancement
    of Science. <a href="https://doi.org/10.1126/science.1152697">https://doi.org/10.1126/science.1152697</a>
  chicago: Hosten, Onur, and Paul Kwiat. “Observation of the Spin Hall Effect of Light
    via Weak Measurements.” <i>Science</i>. American Association for the Advancement
    of Science, 2008. <a href="https://doi.org/10.1126/science.1152697">https://doi.org/10.1126/science.1152697</a>.
  ieee: O. Hosten and P. Kwiat, “Observation of the spin hall effect of light via
    weak measurements,” <i>Science</i>, vol. 319, no. 5864. American Association for
    the Advancement of Science, pp. 787–790, 2008.
  ista: Hosten O, Kwiat P. 2008. Observation of the spin hall effect of light via
    weak measurements. Science. 319(5864), 787–790.
  mla: Hosten, Onur, and Paul Kwiat. “Observation of the Spin Hall Effect of Light
    via Weak Measurements.” <i>Science</i>, vol. 319, no. 5864, American Association
    for the Advancement of Science, 2008, pp. 787–90, doi:<a href="https://doi.org/10.1126/science.1152697">10.1126/science.1152697</a>.
  short: O. Hosten, P. Kwiat, Science 319 (2008) 787–790.
date_created: 2018-12-11T11:47:19Z
date_published: 2008-02-08T00:00:00Z
date_updated: 2021-01-12T08:03:38Z
day: '08'
doi: 10.1126/science.1152697
extern: 1
intvolume: '       319'
issue: '5864'
month: '02'
page: 787 - 790
publication: Science
publication_status: published
publisher: American Association for the Advancement of Science
publist_id: '7226'
quality_controlled: 0
status: public
title: Observation of the spin hall effect of light via weak measurements
type: journal_article
volume: 319
year: '2008'
...
---
_id: '584'
abstract:
- lang: eng
  text: Using “quantum weak-measurements” as a coherent enhancement technique for
    small signals, we have measured the recently proposed “spin Hall effect” of light
    at an air-glass interface, and are working on the smoothly varying refractive-index
    case.
alternative_title:
- Optics InfoBase Conference Papers
article_processing_charge: No
author:
- first_name: Onur
  full_name: Hosten, Onur
  id: 4C02D85E-F248-11E8-B48F-1D18A9856A87
  last_name: Hosten
  orcid: 0000-0002-2031-204X
- first_name: Paul
  full_name: Kwiat, Paul
  last_name: Kwiat
citation:
  ama: 'Hosten O, Kwiat P. Spin hall effect of light via weak measurements: Sharp
    and smooth index variations. In: Optica Publishing Group; 2008.'
  apa: 'Hosten, O., &#38; Kwiat, P. (2008). Spin hall effect of light via weak measurements:
    Sharp and smooth index variations. Presented at the QELS: Quantum Electronics
    and Laser Science Conference, San Jose, CA, United States: Optica Publishing Group.'
  chicago: 'Hosten, Onur, and Paul Kwiat. “Spin Hall Effect of Light via Weak Measurements:
    Sharp and Smooth Index Variations.” Optica Publishing Group, 2008.'
  ieee: 'O. Hosten and P. Kwiat, “Spin hall effect of light via weak measurements:
    Sharp and smooth index variations,” presented at the QELS: Quantum Electronics
    and Laser Science Conference, San Jose, CA, United States, 2008.'
  ista: 'Hosten O, Kwiat P. 2008. Spin hall effect of light via weak measurements:
    Sharp and smooth index variations. QELS: Quantum Electronics and Laser Science
    Conference, Optics InfoBase Conference Papers, .'
  mla: 'Hosten, Onur, and Paul Kwiat. <i>Spin Hall Effect of Light via Weak Measurements:
    Sharp and Smooth Index Variations</i>. Optica Publishing Group, 2008.'
  short: O. Hosten, P. Kwiat, in:, Optica Publishing Group, 2008.
conference:
  end_date: 2008-05-09
  location: San Jose, CA, United States
  name: 'QELS: Quantum Electronics and Laser Science Conference'
  start_date: 2008-05-04
corr_author: '1'
date_created: 2018-12-11T11:47:20Z
date_published: 2008-01-01T00:00:00Z
date_updated: 2024-10-09T20:53:53Z
day: '01'
extern: '1'
language:
- iso: eng
main_file_link:
- url: https://opg.optica.org/abstract.cfm?URI=QELS-2008-QFB7
month: '01'
oa_version: None
publication_identifier:
  isbn:
  - 978-155752859-9
  issn:
  - '21622701'
publication_status: published
publisher: Optica Publishing Group
publist_id: '7227'
quality_controlled: '1'
scopus_import: '1'
status: public
title: 'Spin hall effect of light via weak measurements: Sharp and smooth index variations'
type: conference
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
year: '2008'
...
---
_id: '6146'
abstract:
- lang: eng
  text: Homeostasis of internal carbon dioxide (CO2) and oxygen (O2) levels is fundamental
    to all animals. Here we examine the CO2 response of the nematode Caenorhabditis
    elegans. This species inhabits rotting material, which typically has a broad CO2
    concentration range. We show that well fed C. elegans avoid CO2 levels above 0.5%.
    Animals can respond to both absolute CO2 concentrations and changes in CO2 levels
    within seconds. Responses to CO2 do not reflect avoidance of acid pH but appear
    to define a new sensory response. Sensation of CO2 is promoted by the cGMP-gated
    ion channel subunits TAX-2 and TAX-4, but other pathways are also important. Robust
    CO2 avoidance in well fed animals requires inhibition of the DAF-16 forkhead transcription
    factor by the insulin-like receptor DAF-2. Starvation, which activates DAF-16,
    strongly suppresses CO2 avoidance. Exposure to hypoxia (<1% O2) also suppresses
    CO2 avoidance via activation of the hypoxia-inducible transcription factor HIF-1.
    The npr-1 215V allele of the naturally polymorphic neuropeptide receptor npr-1,
    besides inhibiting avoidance of high ambient O2 in feeding C. elegans, also promotes
    avoidance of high CO2. C. elegans integrates competing O2 and CO2 sensory inputs
    so that one response dominates. Food and allelic variation at NPR-1 regulate which
    response prevails. Our results suggest that multiple sensory inputs are coordinated
    by C. elegans to generate different coherent foraging strategies.
author:
- first_name: A. J.
  full_name: Bretscher, A. J.
  last_name: Bretscher
- first_name: K. E.
  full_name: Busch, K. E.
  last_name: Busch
- first_name: Mario
  full_name: de Bono, Mario
  id: 4E3FF80E-F248-11E8-B48F-1D18A9856A87
  last_name: de Bono
  orcid: 0000-0001-8347-0443
citation:
  ama: Bretscher AJ, Busch KE, de Bono M. A carbon dioxide avoidance behavior is integrated
    with responses to ambient oxygen and food in Caenorhabditis elegans. <i>Proceedings
    of the National Academy of Sciences</i>. 2008;105(23):8044-8049. doi:<a href="https://doi.org/10.1073/pnas.0707607105">10.1073/pnas.0707607105</a>
  apa: Bretscher, A. J., Busch, K. E., &#38; de Bono, M. (2008). A carbon dioxide
    avoidance behavior is integrated with responses to ambient oxygen and food in
    Caenorhabditis elegans. <i>Proceedings of the National Academy of Sciences</i>.
    Proceedings of the National Academy of Sciences. <a href="https://doi.org/10.1073/pnas.0707607105">https://doi.org/10.1073/pnas.0707607105</a>
  chicago: Bretscher, A. J., K. E. Busch, and Mario de Bono. “A Carbon Dioxide Avoidance
    Behavior Is Integrated with Responses to Ambient Oxygen and Food in Caenorhabditis
    Elegans.” <i>Proceedings of the National Academy of Sciences</i>. Proceedings
    of the National Academy of Sciences, 2008. <a href="https://doi.org/10.1073/pnas.0707607105">https://doi.org/10.1073/pnas.0707607105</a>.
  ieee: A. J. Bretscher, K. E. Busch, and M. de Bono, “A carbon dioxide avoidance
    behavior is integrated with responses to ambient oxygen and food in Caenorhabditis
    elegans,” <i>Proceedings of the National Academy of Sciences</i>, vol. 105, no.
    23. Proceedings of the National Academy of Sciences, pp. 8044–8049, 2008.
  ista: Bretscher AJ, Busch KE, de Bono M. 2008. A carbon dioxide avoidance behavior
    is integrated with responses to ambient oxygen and food in Caenorhabditis elegans.
    Proceedings of the National Academy of Sciences. 105(23), 8044–8049.
  mla: Bretscher, A. J., et al. “A Carbon Dioxide Avoidance Behavior Is Integrated
    with Responses to Ambient Oxygen and Food in Caenorhabditis Elegans.” <i>Proceedings
    of the National Academy of Sciences</i>, vol. 105, no. 23, Proceedings of the
    National Academy of Sciences, 2008, pp. 8044–49, doi:<a href="https://doi.org/10.1073/pnas.0707607105">10.1073/pnas.0707607105</a>.
  short: A.J. Bretscher, K.E. Busch, M. de Bono, Proceedings of the National Academy
    of Sciences 105 (2008) 8044–8049.
date_created: 2019-03-21T08:10:15Z
date_published: 2008-06-10T00:00:00Z
date_updated: 2021-01-12T08:06:21Z
day: '10'
ddc:
- '570'
doi: 10.1073/pnas.0707607105
extern: '1'
external_id:
  pmid:
  - '18524954'
file:
- access_level: open_access
  checksum: eac0413064b022c1489f7b6719e7228c
  content_type: application/pdf
  creator: kschuh
  date_created: 2019-03-21T08:14:54Z
  date_updated: 2020-07-14T12:47:20Z
  file_id: '6147'
  file_name: 2008_PNAS_Bretscher.pdf
  file_size: 501506
  relation: main_file
file_date_updated: 2020-07-14T12:47:20Z
has_accepted_license: '1'
intvolume: '       105'
issue: '23'
language:
- iso: eng
month: '06'
oa: 1
oa_version: Published Version
page: 8044-8049
pmid: 1
publication: Proceedings of the National Academy of Sciences
publication_identifier:
  issn:
  - 0027-8424
  - 1091-6490
publication_status: published
publisher: Proceedings of the National Academy of Sciences
quality_controlled: '1'
status: public
title: A carbon dioxide avoidance behavior is integrated with responses to ambient
  oxygen and food in Caenorhabditis elegans
type: journal_article
user_id: 3E5EF7F0-F248-11E8-B48F-1D18A9856A87
volume: 105
year: '2008'
...
---
_id: '6148'
author:
- first_name: Jan E.
  full_name: Kammenga, Jan E.
  last_name: Kammenga
- first_name: Patrick C.
  full_name: Phillips, Patrick C.
  last_name: Phillips
- first_name: Mario
  full_name: de Bono, Mario
  id: 4E3FF80E-F248-11E8-B48F-1D18A9856A87
  last_name: de Bono
  orcid: 0000-0001-8347-0443
- first_name: Agnieszka
  full_name: Doroszuk, Agnieszka
  last_name: Doroszuk
citation:
  ama: 'Kammenga JE, Phillips PC, de Bono M, Doroszuk A. Beyond induced mutants: using
    worms to study natural variation in genetic pathways. <i>Trends in Genetics</i>.
    2008;24(4):178-185. doi:<a href="https://doi.org/10.1016/j.tig.2008.01.001">10.1016/j.tig.2008.01.001</a>'
  apa: 'Kammenga, J. E., Phillips, P. C., de Bono, M., &#38; Doroszuk, A. (2008).
    Beyond induced mutants: using worms to study natural variation in genetic pathways.
    <i>Trends in Genetics</i>. Elsevier. <a href="https://doi.org/10.1016/j.tig.2008.01.001">https://doi.org/10.1016/j.tig.2008.01.001</a>'
  chicago: 'Kammenga, Jan E., Patrick C. Phillips, Mario de Bono, and Agnieszka Doroszuk.
    “Beyond Induced Mutants: Using Worms to Study Natural Variation in Genetic Pathways.”
    <i>Trends in Genetics</i>. Elsevier, 2008. <a href="https://doi.org/10.1016/j.tig.2008.01.001">https://doi.org/10.1016/j.tig.2008.01.001</a>.'
  ieee: 'J. E. Kammenga, P. C. Phillips, M. de Bono, and A. Doroszuk, “Beyond induced
    mutants: using worms to study natural variation in genetic pathways,” <i>Trends
    in Genetics</i>, vol. 24, no. 4. Elsevier, pp. 178–185, 2008.'
  ista: 'Kammenga JE, Phillips PC, de Bono M, Doroszuk A. 2008. Beyond induced mutants:
    using worms to study natural variation in genetic pathways. Trends in Genetics.
    24(4), 178–185.'
  mla: 'Kammenga, Jan E., et al. “Beyond Induced Mutants: Using Worms to Study Natural
    Variation in Genetic Pathways.” <i>Trends in Genetics</i>, vol. 24, no. 4, Elsevier,
    2008, pp. 178–85, doi:<a href="https://doi.org/10.1016/j.tig.2008.01.001">10.1016/j.tig.2008.01.001</a>.'
  short: J.E. Kammenga, P.C. Phillips, M. de Bono, A. Doroszuk, Trends in Genetics
    24 (2008) 178–185.
date_created: 2019-03-21T08:19:45Z
date_published: 2008-04-01T00:00:00Z
date_updated: 2021-01-12T08:06:21Z
day: '01'
doi: 10.1016/j.tig.2008.01.001
extern: '1'
external_id:
  pmid:
  - '18325626'
intvolume: '        24'
issue: '4'
language:
- iso: eng
month: '04'
oa_version: None
page: 178-185
pmid: 1
publication: Trends in Genetics
publication_identifier:
  issn:
  - 0168-9525
publication_status: published
publisher: Elsevier
quality_controlled: '1'
status: public
title: 'Beyond induced mutants: using worms to study natural variation in genetic
  pathways'
type: journal_article
user_id: 3E5EF7F0-F248-11E8-B48F-1D18A9856A87
volume: 24
year: '2008'
...
---
_id: '6149'
article_processing_charge: No
author:
- first_name: Birgitta
  full_name: Olofsson, Birgitta
  last_name: Olofsson
- first_name: Mario
  full_name: de Bono, Mario
  id: 4E3FF80E-F248-11E8-B48F-1D18A9856A87
  last_name: de Bono
  orcid: 0000-0001-8347-0443
citation:
  ama: 'Olofsson B, de Bono M. Sleep: dozy worms and sleepy flies. <i>Current Biology</i>.
    2008;18(5):R204-R206. doi:<a href="https://doi.org/10.1016/j.cub.2008.01.002">10.1016/j.cub.2008.01.002</a>'
  apa: 'Olofsson, B., &#38; de Bono, M. (2008). Sleep: dozy worms and sleepy flies.
    <i>Current Biology</i>. Elsevier. <a href="https://doi.org/10.1016/j.cub.2008.01.002">https://doi.org/10.1016/j.cub.2008.01.002</a>'
  chicago: 'Olofsson, Birgitta, and Mario de Bono. “Sleep: Dozy Worms and Sleepy Flies.”
    <i>Current Biology</i>. Elsevier, 2008. <a href="https://doi.org/10.1016/j.cub.2008.01.002">https://doi.org/10.1016/j.cub.2008.01.002</a>.'
  ieee: 'B. Olofsson and M. de Bono, “Sleep: dozy worms and sleepy flies,” <i>Current
    Biology</i>, vol. 18, no. 5. Elsevier, pp. R204–R206, 2008.'
  ista: 'Olofsson B, de Bono M. 2008. Sleep: dozy worms and sleepy flies. Current
    Biology. 18(5), R204–R206.'
  mla: 'Olofsson, Birgitta, and Mario de Bono. “Sleep: Dozy Worms and Sleepy Flies.”
    <i>Current Biology</i>, vol. 18, no. 5, Elsevier, 2008, pp. R204–06, doi:<a href="https://doi.org/10.1016/j.cub.2008.01.002">10.1016/j.cub.2008.01.002</a>.'
  short: B. Olofsson, M. de Bono, Current Biology 18 (2008) R204–R206.
date_created: 2019-03-21T08:23:24Z
date_published: 2008-03-11T00:00:00Z
date_updated: 2022-08-25T15:03:41Z
day: '11'
doi: 10.1016/j.cub.2008.01.002
extern: '1'
external_id:
  pmid:
  - '18334193'
intvolume: '        18'
issue: '5'
language:
- iso: eng
month: '03'
oa_version: None
page: R204-R206
pmid: 1
publication: Current Biology
publication_identifier:
  issn:
  - 0960-9822
publication_status: published
publisher: Elsevier
quality_controlled: '1'
status: public
title: 'Sleep: dozy worms and sleepy flies'
type: journal_article
user_id: 3E5EF7F0-F248-11E8-B48F-1D18A9856A87
volume: 18
year: '2008'
...
---
_id: '7320'
abstract:
- lang: eng
  text: A comparative, experimental diffusivity study of gas diffusion layer (GDL)
    materials for polymer electrolyte fuel cells (PEFC) is presented for the first
    time. The GDL plays an important role for electrochemical losses due to gas transport
    limitations at high current densities. Characterization and optimization of these
    layers is therefore essential to improve power density. A recently developed method
    which allows for fast diffusimetry is applied and data compared to the literature
    values. Measurements are made as a function of direction and compression and the
    effect of different binder structures and hydrophobic treatments on effective
    diffusivities are discussed. A better understanding of the results is gained by
    including novel GDL cross-section images and a meaningful unit cell model for
    the interpretation of the data. The diffusivity data is valuable for GDL manufacturers
    and future PEFC models. The study reveals that a binder–fiber ratio larger than
    50% has a negative impact on the effective diffusion properties. The hydrophobic
    treatment which is necessary to improve the water management can impede diffusion
    and thus reduce the power density. Furthermore binder has an isotropic effect
    while compression pronounces the in-plane orientation of the fibers.
article_processing_charge: No
article_type: original
author:
- first_name: Reto
  full_name: Flückiger, Reto
  last_name: Flückiger
- first_name: Stefan Alexander
  full_name: Freunberger, Stefan Alexander
  id: A8CA28E6-CE23-11E9-AD2D-EC27E6697425
  last_name: Freunberger
  orcid: 0000-0003-2902-5319
- first_name: Denis
  full_name: Kramer, Denis
  last_name: Kramer
- first_name: Alexander
  full_name: Wokaun, Alexander
  last_name: Wokaun
- first_name: Günther G.
  full_name: Scherer, Günther G.
  last_name: Scherer
- first_name: Felix N.
  full_name: Büchi, Felix N.
  last_name: Büchi
citation:
  ama: Flückiger R, Freunberger SA, Kramer D, Wokaun A, Scherer GG, Büchi FN. Anisotropic,
    effective diffusivity of porous gas diffusion layer materials for PEFC. <i>Electrochimica
    Acta</i>. 2008;54(2):551-559. doi:<a href="https://doi.org/10.1016/j.electacta.2008.07.034">10.1016/j.electacta.2008.07.034</a>
  apa: Flückiger, R., Freunberger, S. A., Kramer, D., Wokaun, A., Scherer, G. G.,
    &#38; Büchi, F. N. (2008). Anisotropic, effective diffusivity of porous gas diffusion
    layer materials for PEFC. <i>Electrochimica Acta</i>. Elsevier. <a href="https://doi.org/10.1016/j.electacta.2008.07.034">https://doi.org/10.1016/j.electacta.2008.07.034</a>
  chicago: Flückiger, Reto, Stefan Alexander Freunberger, Denis Kramer, Alexander
    Wokaun, Günther G. Scherer, and Felix N. Büchi. “Anisotropic, Effective Diffusivity
    of Porous Gas Diffusion Layer Materials for PEFC.” <i>Electrochimica Acta</i>.
    Elsevier, 2008. <a href="https://doi.org/10.1016/j.electacta.2008.07.034">https://doi.org/10.1016/j.electacta.2008.07.034</a>.
  ieee: R. Flückiger, S. A. Freunberger, D. Kramer, A. Wokaun, G. G. Scherer, and
    F. N. Büchi, “Anisotropic, effective diffusivity of porous gas diffusion layer
    materials for PEFC,” <i>Electrochimica Acta</i>, vol. 54, no. 2. Elsevier, pp.
    551–559, 2008.
  ista: Flückiger R, Freunberger SA, Kramer D, Wokaun A, Scherer GG, Büchi FN. 2008.
    Anisotropic, effective diffusivity of porous gas diffusion layer materials for
    PEFC. Electrochimica Acta. 54(2), 551–559.
  mla: Flückiger, Reto, et al. “Anisotropic, Effective Diffusivity of Porous Gas Diffusion
    Layer Materials for PEFC.” <i>Electrochimica Acta</i>, vol. 54, no. 2, Elsevier,
    2008, pp. 551–59, doi:<a href="https://doi.org/10.1016/j.electacta.2008.07.034">10.1016/j.electacta.2008.07.034</a>.
  short: R. Flückiger, S.A. Freunberger, D. Kramer, A. Wokaun, G.G. Scherer, F.N.
    Büchi, Electrochimica Acta 54 (2008) 551–559.
date_created: 2020-01-15T12:21:36Z
date_published: 2008-12-30T00:00:00Z
date_updated: 2021-01-12T08:13:02Z
day: '30'
doi: 10.1016/j.electacta.2008.07.034
extern: '1'
intvolume: '        54'
issue: '2'
language:
- iso: eng
month: '12'
oa_version: None
page: 551-559
publication: Electrochimica Acta
publication_identifier:
  issn:
  - 0013-4686
publication_status: published
publisher: Elsevier
quality_controlled: '1'
status: public
title: Anisotropic, effective diffusivity of porous gas diffusion layer materials
  for PEFC
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 54
year: '2008'
...
---
_id: '7321'
abstract:
- lang: eng
  text: Cell interaction phenomena in polymer electrolyte fuel cell stacks that arise
    from imbalance between adjacent cells are investigated in detail experimentally
    and theoretically. A specialized two-cell stack with advanced localized diagnostics
    was developed and used to analyze the mechanism and effect of cell-to-cell coupling
    as a result of operationally relevant variations in reactant feed flow. Contributions
    to overall and local voltage changes with respect to uniformly operated cells
    are scrutinized. Unequal operation of the cells causes in-plane current in the
    bipolar plate to redistribute current and result in inhomogeneous polarization.
    Both increasing and decreasing polarization along the air-flow path reduces cell
    power as compared to isopotential operation. A two-dimensional model based on
    a commercial computational fluid dynamics code is used to back and extend the
    experimental results to more general cases. Furthermore, the experimental setup
    presented allowed for the first time to perform simultaneous localized electrochemical
    impedance spectroscopy beyond the single-cell level. The mechanism of mutual cell
    interaction on local and integral spectra is revealed. Results show that virtually
    identical operation of the cells is essential to obtain meaningful integral spectra.
article_number: B704
article_processing_charge: No
article_type: original
author:
- first_name: Stefan Alexander
  full_name: Freunberger, Stefan Alexander
  id: A8CA28E6-CE23-11E9-AD2D-EC27E6697425
  last_name: Freunberger
  orcid: 0000-0003-2902-5319
- first_name: Ingo A.
  full_name: Schneider, Ingo A.
  last_name: Schneider
- first_name: Pang-Chieh
  full_name: Sui, Pang-Chieh
  last_name: Sui
- first_name: Alexander
  full_name: Wokaun, Alexander
  last_name: Wokaun
- first_name: Nedjib
  full_name: Djilali, Nedjib
  last_name: Djilali
- first_name: Felix N.
  full_name: Büchi, Felix N.
  last_name: Büchi
citation:
  ama: Freunberger SA, Schneider IA, Sui P-C, Wokaun A, Djilali N, Büchi FN. Cell
    interaction phenomena in polymer electrolyte fuel cell stacks. <i>Journal of The
    Electrochemical Society</i>. 2008;155(7). doi:<a href="https://doi.org/10.1149/1.2913095">10.1149/1.2913095</a>
  apa: Freunberger, S. A., Schneider, I. A., Sui, P.-C., Wokaun, A., Djilali, N.,
    &#38; Büchi, F. N. (2008). Cell interaction phenomena in polymer electrolyte
    fuel cell stacks. <i>Journal of The Electrochemical Society</i>. The Electrochemical
    Society. <a href="https://doi.org/10.1149/1.2913095">https://doi.org/10.1149/1.2913095</a>
  chicago: Freunberger, Stefan Alexander, Ingo A. Schneider, Pang-Chieh Sui, Alexander
    Wokaun, Nedjib Djilali, and Felix N. Büchi. “Cell Interaction Phenomena in Polymer
    Electrolyte Fuel Cell Stacks.” <i>Journal of The Electrochemical Society</i>.
    The Electrochemical Society, 2008. <a href="https://doi.org/10.1149/1.2913095">https://doi.org/10.1149/1.2913095</a>.
  ieee: S. A. Freunberger, I. A. Schneider, P.-C. Sui, A. Wokaun, N. Djilali, and
    F. N. Büchi, “Cell interaction phenomena in polymer electrolyte fuel cell stacks,”
    <i>Journal of The Electrochemical Society</i>, vol. 155, no. 7. The Electrochemical
    Society, 2008.
  ista: Freunberger SA, Schneider IA, Sui P-C, Wokaun A, Djilali N, Büchi FN. 2008.
    Cell interaction phenomena in polymer electrolyte fuel cell stacks. Journal of
    The Electrochemical Society. 155(7), B704.
  mla: Freunberger, Stefan Alexander, et al. “Cell Interaction Phenomena in Polymer
    Electrolyte Fuel Cell Stacks.” <i>Journal of The Electrochemical Society</i>,
    vol. 155, no. 7, B704, The Electrochemical Society, 2008, doi:<a href="https://doi.org/10.1149/1.2913095">10.1149/1.2913095</a>.
  short: S.A. Freunberger, I.A. Schneider, P.-C. Sui, A. Wokaun, N. Djilali, F.N.
    Büchi, Journal of The Electrochemical Society 155 (2008).
date_created: 2020-01-15T12:21:47Z
date_published: 2008-05-08T00:00:00Z
date_updated: 2021-01-12T08:13:03Z
day: '08'
doi: 10.1149/1.2913095
extern: '1'
intvolume: '       155'
issue: '7'
language:
- iso: eng
month: '05'
oa_version: None
publication: Journal of The Electrochemical Society
publication_identifier:
  issn:
  - 0013-4651
publication_status: published
publisher: The Electrochemical Society
quality_controlled: '1'
status: public
title: Cell interaction phenomena in polymer electrolyte fuel cell stacks
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 155
year: '2008'
...
---
_id: '7322'
abstract:
- lang: eng
  text: The gas diffusion layers (GDLs) of a membrane electrode assembly (MEA) serve
    as link between flow field and porous electrode within a polymer electrolyte fuel
    cell. Beside ensuring sufficient electrical and thermal contact between the whole
    electrode area and the flow field, these typically 200–400 μm thick porous structures
    enable the access of educts to the electrode area which would be occluded by the
    flow field lands if the flow field is directly attached to the electrode. Hence,
    the characterisation of properties pertaining to mass transport of educts and
    products through these structures is indispensable whilst examining the contribution
    of the GDLs to the overall electrochemical characteristics of a MEA. A fast and
    cost effective method to measure the effective diffusivity of a GDL is presented.
    Electrochemical impedance spectroscopy is applied to measure the effective ionic
    conductivity of an electrolyte-soaked GDL. Taking advantage of the analogy between
    Ficks and Ohms law, this provides a measure for the effective diffusivity. The
    method is described in detail, including experimental as well as theoretical aspects,
    and selected results, highlighting the anisotropy and dependence on the degree
    of compression, are shown. Moreover, a two-dimensional model consisting of regularly
    spaced ellipses is developed to represent the porous structure of the GDL, and
    by using conformal maps, the agreement between this model and experiment with
    respect to the sensitivity of the effective diffusivity towards compression is
    shown.
article_processing_charge: No
article_type: original
author:
- first_name: Denis
  full_name: Kramer, Denis
  last_name: Kramer
- first_name: Stefan Alexander
  full_name: Freunberger, Stefan Alexander
  id: A8CA28E6-CE23-11E9-AD2D-EC27E6697425
  last_name: Freunberger
  orcid: 0000-0003-2902-5319
- first_name: Reto
  full_name: Flückiger, Reto
  last_name: Flückiger
- first_name: Ingo A.
  full_name: Schneider, Ingo A.
  last_name: Schneider
- first_name: Alexander
  full_name: Wokaun, Alexander
  last_name: Wokaun
- first_name: Felix N.
  full_name: Büchi, Felix N.
  last_name: Büchi
- first_name: Günther G.
  full_name: Scherer, Günther G.
  last_name: Scherer
citation:
  ama: Kramer D, Freunberger SA, Flückiger R, et al. Electrochemical diffusimetry
    of fuel cell gas diffusion layers. <i>Journal of Electroanalytical Chemistry</i>.
    2008;612(1):63-77. doi:<a href="https://doi.org/10.1016/j.jelechem.2007.09.014">10.1016/j.jelechem.2007.09.014</a>
  apa: Kramer, D., Freunberger, S. A., Flückiger, R., Schneider, I. A., Wokaun, A.,
    Büchi, F. N., &#38; Scherer, G. G. (2008). Electrochemical diffusimetry of fuel
    cell gas diffusion layers. <i>Journal of Electroanalytical Chemistry</i>. Elsevier.
    <a href="https://doi.org/10.1016/j.jelechem.2007.09.014">https://doi.org/10.1016/j.jelechem.2007.09.014</a>
  chicago: Kramer, Denis, Stefan Alexander Freunberger, Reto Flückiger, Ingo A. Schneider,
    Alexander Wokaun, Felix N. Büchi, and Günther G. Scherer. “Electrochemical Diffusimetry
    of Fuel Cell Gas Diffusion Layers.” <i>Journal of Electroanalytical Chemistry</i>.
    Elsevier, 2008. <a href="https://doi.org/10.1016/j.jelechem.2007.09.014">https://doi.org/10.1016/j.jelechem.2007.09.014</a>.
  ieee: D. Kramer <i>et al.</i>, “Electrochemical diffusimetry of fuel cell gas diffusion
    layers,” <i>Journal of Electroanalytical Chemistry</i>, vol. 612, no. 1. Elsevier,
    pp. 63–77, 2008.
  ista: Kramer D, Freunberger SA, Flückiger R, Schneider IA, Wokaun A, Büchi FN, Scherer
    GG. 2008. Electrochemical diffusimetry of fuel cell gas diffusion layers. Journal
    of Electroanalytical Chemistry. 612(1), 63–77.
  mla: Kramer, Denis, et al. “Electrochemical Diffusimetry of Fuel Cell Gas Diffusion
    Layers.” <i>Journal of Electroanalytical Chemistry</i>, vol. 612, no. 1, Elsevier,
    2008, pp. 63–77, doi:<a href="https://doi.org/10.1016/j.jelechem.2007.09.014">10.1016/j.jelechem.2007.09.014</a>.
  short: D. Kramer, S.A. Freunberger, R. Flückiger, I.A. Schneider, A. Wokaun, F.N.
    Büchi, G.G. Scherer, Journal of Electroanalytical Chemistry 612 (2008) 63–77.
date_created: 2020-01-15T12:21:57Z
date_published: 2008-01-01T00:00:00Z
date_updated: 2021-01-12T08:13:03Z
day: '01'
doi: 10.1016/j.jelechem.2007.09.014
extern: '1'
intvolume: '       612'
issue: '1'
language:
- iso: eng
month: '01'
oa_version: None
page: 63-77
publication: Journal of Electroanalytical Chemistry
publication_identifier:
  issn:
  - 1572-6657
publication_status: published
publisher: Elsevier
quality_controlled: '1'
status: public
title: Electrochemical diffusimetry of fuel cell gas diffusion layers
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 612
year: '2008'
...
---
_id: '7425'
abstract:
- lang: eng
  text: The propagation of single cell performance losses to adjacent cells in a polymer
    electrolyte fuel cell stack is studied by means of local current density measurements
    in a two cell stack. In this stack, the working conditions of adjacent cells can
    be controlled independently in order to deliberately change the performance of
    one cell (inducing cell) and study the coupling effects to the adjacent cell (response
    cell), while keeping the working conditions of the later one unchanged. The experiments
    have shown that changes in the current density distribution caused by lowering
    of the air stoichiometry in the inducing cell cause changes in the current density
    distribution of the response cell in the order of 60% of the change of the inducing
    cell, even when the air stoichiometry of the response cell is kept constant. The
    losses in cell voltage of the inducing cell cause losses in cell voltage of the
    response cell in a magnitude between 30 and 50%.
article_processing_charge: No
author:
- first_name: Marco
  full_name: Santis, Marco
  last_name: Santis
- first_name: Stefan Alexander
  full_name: Freunberger, Stefan Alexander
  id: A8CA28E6-CE23-11E9-AD2D-EC27E6697425
  last_name: Freunberger
  orcid: 0000-0003-2902-5319
- first_name: Matthias
  full_name: Papra, Matthias
  last_name: Papra
- first_name: Felix N.
  full_name: Büchi, Felix N.
  last_name: Büchi
citation:
  ama: 'Santis M, Freunberger SA, Papra M, Büchi FN. Experimental investigation of
    the propagation of local current density variations to adjacent cells in PEFC
    stacks. In: <i>3rd International Conference on Fuel Cell Science, Engineering
    and Technology</i>. ASMEDC; 2008:763-765. doi:<a href="https://doi.org/10.1115/fuelcell2005-74116">10.1115/fuelcell2005-74116</a>'
  apa: 'Santis, M., Freunberger, S. A., Papra, M., &#38; Büchi, F. N. (2008). Experimental
    investigation of the propagation of local current density variations to adjacent
    cells in PEFC stacks. In <i>3rd International Conference on Fuel Cell Science,
    Engineering and Technology</i> (pp. 763–765). Ypsilanti, MI, United States: ASMEDC.
    <a href="https://doi.org/10.1115/fuelcell2005-74116">https://doi.org/10.1115/fuelcell2005-74116</a>'
  chicago: Santis, Marco, Stefan Alexander Freunberger, Matthias Papra, and Felix
    N. Büchi. “Experimental Investigation of the Propagation of Local Current Density
    Variations to Adjacent Cells in PEFC Stacks.” In <i>3rd International Conference
    on Fuel Cell Science, Engineering and Technology</i>, 763–65. ASMEDC, 2008. <a
    href="https://doi.org/10.1115/fuelcell2005-74116">https://doi.org/10.1115/fuelcell2005-74116</a>.
  ieee: M. Santis, S. A. Freunberger, M. Papra, and F. N. Büchi, “Experimental investigation
    of the propagation of local current density variations to adjacent cells in PEFC
    stacks,” in <i>3rd International Conference on Fuel Cell Science, Engineering
    and Technology</i>, Ypsilanti, MI, United States, 2008, pp. 763–765.
  ista: Santis M, Freunberger SA, Papra M, Büchi FN. 2008. Experimental investigation
    of the propagation of local current density variations to adjacent cells in PEFC
    stacks. 3rd International Conference on Fuel Cell Science, Engineering and Technology.
    International conference on fuel cell science, engineering and technology, 763–765.
  mla: Santis, Marco, et al. “Experimental Investigation of the Propagation of Local
    Current Density Variations to Adjacent Cells in PEFC Stacks.” <i>3rd International
    Conference on Fuel Cell Science, Engineering and Technology</i>, ASMEDC, 2008,
    pp. 763–65, doi:<a href="https://doi.org/10.1115/fuelcell2005-74116">10.1115/fuelcell2005-74116</a>.
  short: M. Santis, S.A. Freunberger, M. Papra, F.N. Büchi, in:, 3rd International
    Conference on Fuel Cell Science, Engineering and Technology, ASMEDC, 2008, pp.
    763–765.
conference:
  end_date: 2005-05-25
  location: Ypsilanti, MI, United States
  name: International conference on fuel cell science, engineering and technology
  start_date: 2005-05-23
date_created: 2020-01-31T10:14:45Z
date_published: 2008-10-13T00:00:00Z
date_updated: 2021-01-12T08:13:33Z
day: '13'
doi: 10.1115/fuelcell2005-74116
extern: '1'
language:
- iso: eng
month: '10'
oa_version: None
page: 763-765
publication: 3rd International Conference on Fuel Cell Science, Engineering and Technology
publication_identifier:
  isbn:
  - '0791837645'
  - '0791837572'
publication_status: published
publisher: ASMEDC
quality_controlled: '1'
status: public
title: Experimental investigation of the propagation of local current density variations
  to adjacent cells in PEFC stacks
type: conference
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
year: '2008'
...
---
_id: '753'
abstract:
- lang: eng
  text: 'This paper addresses the following question: what is the minimum-sized synchronous
    window needed to solve consensus in an otherwise asynchronous system? In answer
    to this question, we present the first optimally-resilient algorithm ASAP that
    solves consensus as soon as possible in an eventually synchronous system, i.e.,
    a system that from some time GST onwards, delivers messages in a timely fashion.
    ASAP guarantees that, in an execution with at most f failures, every process decides
    no later than round GST + f + 2, which is optimal.'
alternative_title:
- LNCS
article_processing_charge: No
author:
- first_name: Dan-Adrian
  full_name: Alistarh, Dan-Adrian
  id: 4A899BFC-F248-11E8-B48F-1D18A9856A87
  last_name: Alistarh
  orcid: 0000-0003-3650-940X
- first_name: Seth
  full_name: Gilbert, Seth
  last_name: Gilbert
- first_name: Rachid
  full_name: Guerraoui, Rachid
  last_name: Guerraoui
- first_name: Corentin
  full_name: Travers, Corentin
  last_name: Travers
citation:
  ama: 'Alistarh D-A, Gilbert S, Guerraoui R, Travers C. How to solve consensus in
    the smallest window of synchrony. In: Vol 5218 LNCS. Springer; 2008:32-46. doi:<a
    href="https://doi.org/10.1007/978-3-540-87779-0_3">10.1007/978-3-540-87779-0_3</a>'
  apa: 'Alistarh, D.-A., Gilbert, S., Guerraoui, R., &#38; Travers, C. (2008). How
    to solve consensus in the smallest window of synchrony (Vol. 5218 LNCS, pp. 32–46).
    Presented at the DISC: Distributed Computing, Springer. <a href="https://doi.org/10.1007/978-3-540-87779-0_3">https://doi.org/10.1007/978-3-540-87779-0_3</a>'
  chicago: Alistarh, Dan-Adrian, Seth Gilbert, Rachid Guerraoui, and Corentin Travers.
    “How to Solve Consensus in the Smallest Window of Synchrony,” 5218 LNCS:32–46.
    Springer, 2008. <a href="https://doi.org/10.1007/978-3-540-87779-0_3">https://doi.org/10.1007/978-3-540-87779-0_3</a>.
  ieee: 'D.-A. Alistarh, S. Gilbert, R. Guerraoui, and C. Travers, “How to solve consensus
    in the smallest window of synchrony,” presented at the DISC: Distributed Computing,
    2008, vol. 5218 LNCS, pp. 32–46.'
  ista: 'Alistarh D-A, Gilbert S, Guerraoui R, Travers C. 2008. How to solve consensus
    in the smallest window of synchrony. DISC: Distributed Computing, LNCS, vol. 5218
    LNCS, 32–46.'
  mla: Alistarh, Dan-Adrian, et al. <i>How to Solve Consensus in the Smallest Window
    of Synchrony</i>. Vol. 5218 LNCS, Springer, 2008, pp. 32–46, doi:<a href="https://doi.org/10.1007/978-3-540-87779-0_3">10.1007/978-3-540-87779-0_3</a>.
  short: D.-A. Alistarh, S. Gilbert, R. Guerraoui, C. Travers, in:, Springer, 2008,
    pp. 32–46.
conference:
  name: 'DISC: Distributed Computing'
date_created: 2018-12-11T11:48:19Z
date_published: 2008-01-01T00:00:00Z
date_updated: 2023-02-23T13:10:13Z
day: '01'
doi: 10.1007/978-3-540-87779-0_3
extern: '1'
language:
- iso: eng
month: '01'
oa_version: None
page: 32 - 46
publication_status: published
publisher: Springer
publist_id: '6904'
status: public
title: How to solve consensus in the smallest window of synchrony
type: conference
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 5218 LNCS
year: '2008'
...
---
_id: '3435'
abstract:
- lang: eng
  text: We develop a new method for estimating effective population sizes, Ne, and
    selection coefficients, s, from time-series data of allele frequencies sampled
    from a single diallelic locus. The method is based on calculating transition probabilities,
    using a numerical solution of the diffusion process, and assuming independent
    binomial sampling from this diffusion process at each time point. We apply the
    method in two example applications. First, we estimate selection coefficients
    acting on the CCR5-Δ32 mutation on the basis of published samples of contemporary
    and ancient human DNA. We show that the data are compatible with the assumption
    of s = 0, although moderate amounts of selection acting on this mutation cannot
    be excluded. In our second example, we estimate the selection coefficient acting
    on a mutation segregating in an experimental phage population. We show that the
    selection coefficient acting on this mutation is ~0.43.
author:
- first_name: Jonathan P
  full_name: Jonathan Bollback
  id: 2C6FA9CC-F248-11E8-B48F-1D18A9856A87
  last_name: Bollback
  orcid: 0000-0002-4624-4612
- first_name: Thomas
  full_name: York, Thomas L
  last_name: York
- first_name: Rasmus
  full_name: Nielsen, Rasmus
  last_name: Nielsen
citation:
  ama: Bollback JP, York T, Nielsen R. Estimation of 2Nes From Temporal Allele Frequency
    Data. <i>Genetics</i>. 2008;179(1):497-502. doi:<a href="https://doi.org/10.1534/genetics.107.085019">10.1534/genetics.107.085019</a>
  apa: Bollback, J. P., York, T., &#38; Nielsen, R. (2008). Estimation of 2Nes From
    Temporal Allele Frequency Data. <i>Genetics</i>. Genetics Society of America.
    <a href="https://doi.org/10.1534/genetics.107.085019">https://doi.org/10.1534/genetics.107.085019</a>
  chicago: Bollback, Jonathan P, Thomas York, and Rasmus Nielsen. “Estimation of 2Nes
    From Temporal Allele Frequency Data.” <i>Genetics</i>. Genetics Society of America,
    2008. <a href="https://doi.org/10.1534/genetics.107.085019">https://doi.org/10.1534/genetics.107.085019</a>.
  ieee: J. P. Bollback, T. York, and R. Nielsen, “Estimation of 2Nes From Temporal
    Allele Frequency Data,” <i>Genetics</i>, vol. 179, no. 1. Genetics Society of
    America, pp. 497–502, 2008.
  ista: Bollback JP, York T, Nielsen R. 2008. Estimation of 2Nes From Temporal Allele
    Frequency Data. Genetics. 179(1), 497–502.
  mla: Bollback, Jonathan P., et al. “Estimation of 2Nes From Temporal Allele Frequency
    Data.” <i>Genetics</i>, vol. 179, no. 1, Genetics Society of America, 2008, pp.
    497–502, doi:<a href="https://doi.org/10.1534/genetics.107.085019">10.1534/genetics.107.085019</a>.
  short: J.P. Bollback, T. York, R. Nielsen, Genetics 179 (2008) 497–502.
date_created: 2018-12-11T12:03:19Z
date_published: 2008-05-01T00:00:00Z
date_updated: 2021-01-12T07:43:27Z
day: '01'
doi: 10.1534/genetics.107.085019
extern: 1
intvolume: '       179'
issue: '1'
main_file_link:
- open_access: '1'
  url: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2390626
month: '05'
oa: 1
page: 497 - 502
publication: Genetics
publication_status: published
publisher: Genetics Society of America
publist_id: '2965'
quality_controlled: 0
status: public
title: Estimation of 2Nes From Temporal Allele Frequency Data
type: journal_article
volume: 179
year: '2008'
...
---
_id: '3501'
abstract:
- lang: eng
  text: |-
    The Wikipedia is a collaborative encyclopedia: anyone can contribute to its articles simply by clicking on an &quot;edit&quot; button. The open nature of the Wikipedia has been key to its success, but has also created a challenge: how can readers develop an informed opinion on its reliability? We propose a system that computes quantitative values of trust for the text in Wikipedia articles; these trust values provide an indication of text reliability.

    The system uses as input the revision history of each article, as well as information about the reputation of the contributing authors, as provided by a reputation system. The trust of a word in an article is computed on the basis of the reputation of the original author of the word, as well as the reputation of all authors who edited text near the word. The algorithm computes word trust values that vary smoothly across the text; the trust values can be visualized using varying text-background colors. The algorithm ensures that all changes to an article's text are reflected in the trust values, preventing surreptitious content changes.

    We have implemented the proposed system, and we have used it to compute and display the trust of the text of thousands of articles of the English Wikipedia. To validate our trust-computation algorithms, we show that text labeled as low-trust has a significantly higher probability of being edited in the future than text labeled as high-trust.
acknowledgement: 'This research has been partially supported by the CITRIS: Center
  for Information Technology Research in the Interest of Society.'
author:
- first_name: B Thomas
  full_name: Adler, B Thomas
  last_name: Adler
- first_name: Krishnendu
  full_name: Krishnendu Chatterjee
  id: 2E5DCA20-F248-11E8-B48F-1D18A9856A87
  last_name: Chatterjee
  orcid: 0000-0002-4561-241X
- first_name: Luca
  full_name: de Alfaro, Luca
  last_name: De Alfaro
- first_name: Marco
  full_name: Faella, Marco
  last_name: Faella
- first_name: Ian
  full_name: Pye, Ian
  last_name: Pye
- first_name: Vishwanath
  full_name: Raman, Vishwanath
  last_name: Raman
citation:
  ama: 'Adler BT, Chatterjee K, De Alfaro L, Faella M, Pye I, Raman V. Assigning trust
    to Wikipedia content. In: ACM; 2008. doi:<a href="https://doi.org/10.1145/1822258.1822293">10.1145/1822258.1822293</a>'
  apa: 'Adler, B. T., Chatterjee, K., De Alfaro, L., Faella, M., Pye, I., &#38; Raman,
    V. (2008). Assigning trust to Wikipedia content. Presented at the WikiSym: International
    Symposium on Wikis, ACM. <a href="https://doi.org/10.1145/1822258.1822293">https://doi.org/10.1145/1822258.1822293</a>'
  chicago: Adler, B Thomas, Krishnendu Chatterjee, Luca De Alfaro, Marco Faella, Ian
    Pye, and Vishwanath Raman. “Assigning Trust to Wikipedia Content.” ACM, 2008.
    <a href="https://doi.org/10.1145/1822258.1822293">https://doi.org/10.1145/1822258.1822293</a>.
  ieee: 'B. T. Adler, K. Chatterjee, L. De Alfaro, M. Faella, I. Pye, and V. Raman,
    “Assigning trust to Wikipedia content,” presented at the WikiSym: International
    Symposium on Wikis, 2008.'
  ista: 'Adler BT, Chatterjee K, De Alfaro L, Faella M, Pye I, Raman V. 2008. Assigning
    trust to Wikipedia content. WikiSym: International Symposium on Wikis.'
  mla: Adler, B. Thomas, et al. <i>Assigning Trust to Wikipedia Content</i>. ACM,
    2008, doi:<a href="https://doi.org/10.1145/1822258.1822293">10.1145/1822258.1822293</a>.
  short: B.T. Adler, K. Chatterjee, L. De Alfaro, M. Faella, I. Pye, V. Raman, in:,
    ACM, 2008.
conference:
  name: 'WikiSym: International Symposium on Wikis'
date_created: 2018-12-11T12:03:40Z
date_published: 2008-09-10T00:00:00Z
date_updated: 2021-01-12T07:43:53Z
day: '10'
doi: 10.1145/1822258.1822293
extern: 1
month: '09'
publication_status: published
publisher: ACM
publist_id: '2886'
quality_controlled: 0
status: public
title: Assigning trust to Wikipedia content
type: conference
year: '2008'
...
---
_id: '3502'
abstract:
- lang: eng
  text: 'In content-driven reputation systems for collaborative content, users gain
    or lose reputation according to how their contributions fare: authors of long-lived
    contributions gain reputation, while authors of reverted contributions lose reputation.
    Existing content-driven systems are prone to Sybil attacks, in which multiple
    identities, controlled by the same person, perform coordinated actions to increase
    their reputation. We show that content-driven reputation systems can be made resistant
    to such attacks by taking advantage of thefact that the reputation increments
    and decrements depend on content modifications, which are visible to all. We present
    an algorithm for content-driven reputation that prevents a set of identities from
    increasing their maximum reputation without doing any useful work. Here, work
    is considered useful if it causes content to evolve in a direction that is consistent
    with the actions of high-reputation users. We argue that the content modifications
    that require no effort, such as the insertion or deletion of arbitrary text, are
    invariably non-useful. We prove a truthfullness result for the resulting system,
    stating that users who wish to perform a contribution do not gain by employing
    complex contribution schemes, compared to simply performing the contribution at
    once. In particular, splitting the contribution in multiple portions, or employing
    the coordinated actions of multiple identities, do not yield additional reputation.
    Taken together, these results indicate that content-driven systems can be made
    robust with respect to Sybil attacks. Copyright 2008 ACM.'
acknowledgement: 'This research has been partially supported by the CITRIS: Center
  for Information Technology Research in the Interest of Society.'
author:
- first_name: Krishnendu
  full_name: Krishnendu Chatterjee
  id: 2E5DCA20-F248-11E8-B48F-1D18A9856A87
  last_name: Chatterjee
  orcid: 0000-0002-4561-241X
- first_name: Luca
  full_name: de Alfaro, Luca
  last_name: De Alfaro
- first_name: Ian
  full_name: Pye, Ian
  last_name: Pye
citation:
  ama: 'Chatterjee K, De Alfaro L, Pye I. Robust content-driven reputation. In: ACM;
    2008:33-42. doi:<a href="https://doi.org/10.1145/1456377.1456387 ">10.1145/1456377.1456387
    </a>'
  apa: 'Chatterjee, K., De Alfaro, L., &#38; Pye, I. (2008). Robust content-driven
    reputation (pp. 33–42). Presented at the AISec: Artificial Intelligence and Security,
    ACM. <a href="https://doi.org/10.1145/1456377.1456387 ">https://doi.org/10.1145/1456377.1456387
    </a>'
  chicago: Chatterjee, Krishnendu, Luca De Alfaro, and Ian Pye. “Robust Content-Driven
    Reputation,” 33–42. ACM, 2008. <a href="https://doi.org/10.1145/1456377.1456387
    ">https://doi.org/10.1145/1456377.1456387 </a>.
  ieee: 'K. Chatterjee, L. De Alfaro, and I. Pye, “Robust content-driven reputation,”
    presented at the AISec: Artificial Intelligence and Security, 2008, pp. 33–42.'
  ista: 'Chatterjee K, De Alfaro L, Pye I. 2008. Robust content-driven reputation.
    AISec: Artificial Intelligence and Security, 33–42.'
  mla: Chatterjee, Krishnendu, et al. <i>Robust Content-Driven Reputation</i>. ACM,
    2008, pp. 33–42, doi:<a href="https://doi.org/10.1145/1456377.1456387 ">10.1145/1456377.1456387
    </a>.
  short: K. Chatterjee, L. De Alfaro, I. Pye, in:, ACM, 2008, pp. 33–42.
conference:
  name: 'AISec: Artificial Intelligence and Security'
date_created: 2018-12-11T12:03:40Z
date_published: 2008-10-31T00:00:00Z
date_updated: 2021-01-12T07:43:54Z
day: '31'
doi: '10.1145/1456377.1456387 '
extern: 1
month: '10'
page: 33 - 42
publication_status: published
publisher: ACM
publist_id: '2885'
quality_controlled: 0
status: public
title: Robust content-driven reputation
type: conference
year: '2008'
...
---
_id: '3504'
abstract:
- lang: eng
  text: "Simulation and bisimulation metrics for stochastic systems provide a quantitative
    gen- eralization of the classical simulation and bisimulation relations. These
    metrics capture the similarity of states with respect to quantitative specifications
    written in the quantitative μ-calculus and related probabilistic logics.\r\nWe
    present algorithms for computing the metrics on Markov decision processes (MDPs),
    turn- based stochastic games, and concurrent games. For turn-based games and MDPs,
    we provide a polynomial-time algorithm based on linear programming for the computation
    of the one-step metric distance between states. The algorithm improves on the
    previously known exponential-time algo- rithm based on a reduction to the theory
    of reals. We then present PSPACE algorithms for both the decision problem and
    the problem of approximating the metric distance between two states, matching
    the best known bound for Markov chains. For the bisimulation kernel of the metric,
    which corresponds to probabilistic bisimulation, our algorithm works in time O(n4)
    for both turn-based games and MDPs; improving the previously best known O(n9 ·
    log(n)) time algorithm for MDPs. For a concurrent game G, we show that computing
    the exact distance between states is at least as hard as computing the value of
    concurrent reachability games and the square-root-sum problem in computational
    geometry. We show that checking whether the metric distance is bounded by a rational
    r, can be accomplished via a reduction to the theory of real closed fields, involving
    a\r\nformula with three quantifier alternations, yielding O(|G|O(|G|5)) time complexity,
    improving the previously known reduction with O(|G|O(|G|7)) time complexity. These
    algorithms can be iterated\r\nto approximate the metrics using binary search."
acknowledgement: This research was supported in part by the NSF grants CCR-0132780
  and CNS-0720884.
alternative_title:
- LIPIcs
author:
- first_name: Krishnendu
  full_name: Chatterjee, Krishnendu
  id: 2E5DCA20-F248-11E8-B48F-1D18A9856A87
  last_name: Chatterjee
  orcid: 0000-0002-4561-241X
- first_name: Luca
  full_name: De Alfaro, Luca
  last_name: De Alfaro
- first_name: Ritankar
  full_name: Majumdar, Ritankar
  last_name: Majumdar
- first_name: Vishwanath
  full_name: Raman, Vishwanath
  last_name: Raman
citation:
  ama: 'Chatterjee K, De Alfaro L, Majumdar R, Raman V. Algorithms for game metrics.
    In: Vol 2. Schloss Dagstuhl - Leibniz-Zentrum für Informatik; 2008:107-118. doi:<a
    href="https://doi.org/10.4230/LIPIcs.FSTTCS.2008.1745">10.4230/LIPIcs.FSTTCS.2008.1745</a>'
  apa: 'Chatterjee, K., De Alfaro, L., Majumdar, R., &#38; Raman, V. (2008). Algorithms
    for game metrics (Vol. 2, pp. 107–118). Presented at the FSTTCS: Foundations of
    Software Technology and Theoretical Computer Science, Schloss Dagstuhl - Leibniz-Zentrum
    für Informatik. <a href="https://doi.org/10.4230/LIPIcs.FSTTCS.2008.1745">https://doi.org/10.4230/LIPIcs.FSTTCS.2008.1745</a>'
  chicago: Chatterjee, Krishnendu, Luca De Alfaro, Ritankar Majumdar, and Vishwanath
    Raman. “Algorithms for Game Metrics,” 2:107–18. Schloss Dagstuhl - Leibniz-Zentrum
    für Informatik, 2008. <a href="https://doi.org/10.4230/LIPIcs.FSTTCS.2008.1745">https://doi.org/10.4230/LIPIcs.FSTTCS.2008.1745</a>.
  ieee: 'K. Chatterjee, L. De Alfaro, R. Majumdar, and V. Raman, “Algorithms for game
    metrics,” presented at the FSTTCS: Foundations of Software Technology and Theoretical
    Computer Science, 2008, vol. 2, pp. 107–118.'
  ista: 'Chatterjee K, De Alfaro L, Majumdar R, Raman V. 2008. Algorithms for game
    metrics. FSTTCS: Foundations of Software Technology and Theoretical Computer Science,
    LIPIcs, vol. 2, 107–118.'
  mla: Chatterjee, Krishnendu, et al. <i>Algorithms for Game Metrics</i>. Vol. 2,
    Schloss Dagstuhl - Leibniz-Zentrum für Informatik, 2008, pp. 107–18, doi:<a href="https://doi.org/10.4230/LIPIcs.FSTTCS.2008.1745">10.4230/LIPIcs.FSTTCS.2008.1745</a>.
  short: K. Chatterjee, L. De Alfaro, R. Majumdar, V. Raman, in:, Schloss Dagstuhl
    - Leibniz-Zentrum für Informatik, 2008, pp. 107–118.
conference:
  name: 'FSTTCS: Foundations of Software Technology and Theoretical Computer Science'
date_created: 2018-12-11T12:03:40Z
date_published: 2008-12-05T00:00:00Z
date_updated: 2025-09-30T09:31:30Z
day: '05'
ddc:
- '000'
doi: 10.4230/LIPIcs.FSTTCS.2008.1745
extern: '1'
file:
- access_level: open_access
  checksum: 0a447454a24e273f7ddf51dbfe47f877
  content_type: application/pdf
  creator: dernst
  date_created: 2019-05-10T10:01:21Z
  date_updated: 2020-07-14T12:46:12Z
  file_id: '6398'
  file_name: 2008_LIPIcs_Chatterjee.pdf
  file_size: 442139
  relation: main_file
file_date_updated: 2020-07-14T12:46:12Z
has_accepted_license: '1'
intvolume: '         2'
language:
- iso: eng
month: '12'
oa: 1
oa_version: Published Version
page: 107 - 118
publication_status: published
publisher: Schloss Dagstuhl - Leibniz-Zentrum für Informatik
publist_id: '2883'
quality_controlled: '1'
related_material:
  record:
  - id: '3868'
    relation: later_version
    status: public
status: public
title: Algorithms for game metrics
tmp:
  image: /images/cc_by_nc_nd.png
  legal_code_url: https://creativecommons.org/licenses/by-nc-nd/4.0/legalcode
  name: Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
    (CC BY-NC-ND 4.0)
  short: CC BY-NC-ND (4.0)
type: conference
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 2
year: '2008'
...
