---
_id: '17737'
abstract:
- lang: eng
text: Cosmological models that include suppression of the power spectrum of density
fluctuations on small scales exhibit an exponential reduction of high-redshift,
non-linear structures, including a reduction in the rate of gamma ray bursts (GRBs).
Here we quantify the constraints that the detection of distant GRBs would place
on structure formation models with reduced small-scale power. We compute the number
of GRBs that could be detectable by the Swift satellite at high redshifts (z >
6), assuming that the GRBs trace the cosmic star formation history, which itself
traces the formation of non-linear structures. We calibrate simple models of the
intrinsic luminosity function of the bursts to the number and flux distribution
of GRBs observed by the Burst And Transient Source Experiment (BATSE). We find
that a discovery of high-z GRBs would imply strong constraints on models with
reduced small-scale power. For example, a single GRB at z > 10, or 10 GRBs at
z > 5, discovered by Swift during its scheduled two-year mission, would rule out
an exponential suppression of the power spectrum on scales below R_c=0.09 Mpc
(exemplified by warm dark matter models with a particle mass of m_x=2 keV). Models
with a less sharp suppression of small-scale power, such as those with a red tilt
or a running scalar index, n_s, are more difficult to constrain, because they
are more degenerate with an increase in the power spectrum normalization, sigma_8,
and with models in which star-formation is allowed in low-mass minihalos. We find
that a tilt of \delta n_s ~ 0.1 is difficult to detect; however, an observed rate
of 1 GRB/yr at z > 12 would yield an upper limit on the running of the spectral
index, alpha = d(n_s)/d(ln k) > -0.05.
article_processing_charge: No
article_type: original
author:
- first_name: Andrei
full_name: Mesinger, Andrei
last_name: Mesinger
- first_name: Rosalba
full_name: Perna, Rosalba
last_name: Perna
- first_name: Zoltán
full_name: Haiman, Zoltán
id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36
last_name: Haiman
citation:
ama: Mesinger A, Perna R, Haiman Z. Constraints on the small‐scale power spectrum
of density fluctuations from high‐redshift gamma‐ray bursts. The Astrophysical
Journal. 2005;623(1):1-10. doi:10.1086/428770
apa: Mesinger, A., Perna, R., & Haiman, Z. (2005). Constraints on the small‐scale
power spectrum of density fluctuations from high‐redshift gamma‐ray bursts. The
Astrophysical Journal. American Astronomical Society. https://doi.org/10.1086/428770
chicago: Mesinger, Andrei, Rosalba Perna, and Zoltán Haiman. “Constraints on the
Small‐scale Power Spectrum of Density Fluctuations from High‐redshift Gamma‐ray
Bursts.” The Astrophysical Journal. American Astronomical Society, 2005.
https://doi.org/10.1086/428770.
ieee: A. Mesinger, R. Perna, and Z. Haiman, “Constraints on the small‐scale power
spectrum of density fluctuations from high‐redshift gamma‐ray bursts,” The
Astrophysical Journal, vol. 623, no. 1. American Astronomical Society, pp.
1–10, 2005.
ista: Mesinger A, Perna R, Haiman Z. 2005. Constraints on the small‐scale power
spectrum of density fluctuations from high‐redshift gamma‐ray bursts. The Astrophysical
Journal. 623(1), 1–10.
mla: Mesinger, Andrei, et al. “Constraints on the Small‐scale Power Spectrum of
Density Fluctuations from High‐redshift Gamma‐ray Bursts.” The Astrophysical
Journal, vol. 623, no. 1, American Astronomical Society, 2005, pp. 1–10, doi:10.1086/428770.
short: A. Mesinger, R. Perna, Z. Haiman, The Astrophysical Journal 623 (2005) 1–10.
date_created: 2024-09-06T09:20:42Z
date_published: 2005-04-10T00:00:00Z
date_updated: 2024-09-26T14:02:13Z
day: '10'
doi: 10.1086/428770
extern: '1'
intvolume: ' 623'
issue: '1'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1086/428770
month: '04'
oa: 1
oa_version: Published Version
page: 1-10
publication: The Astrophysical Journal
publication_identifier:
issn:
- 0004-637X
- 1538-4357
publication_status: published
publisher: American Astronomical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: Constraints on the small‐scale power spectrum of density fluctuations from
high‐redshift gamma‐ray bursts
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 623
year: '2005'
...
---
_id: '17781'
abstract:
- lang: eng
text: We have discovered an extended Lyα plume (UDF 5225) associated with a compact
source at redshift z ≈ 5.4 in slitless spectroscopic data from the Grism ACS Program
for Extragalactic Science (GRAPES) project. The spatial extent of the emission
is about 6 × 1.5 kpc (1'' × 0farcs25). Combining our grism data and the broadband
images from the Hubble Ultra Deep Field (UDF) images, we find a Lyα line flux
of ~2.2 × 10^-17 ergs cm^-2 s^-1 and surface brightness ~7 × 10^-17ergs cm^-2
s-1 arcsec^-2. The UDF images show diffuse continuum emission associated with
UDF 5225, including three embedded knots. The morphology of UDF 5225 is highly
suggestive of a galaxy in assembly. It is possible that the prominent Lyα emission
from this object is due to an active nucleus, and that we are seeing the simultaneous
growth through accretion of a galaxy and its central black hole. Follow-up observations
at higher spectral resolution could test this hypothesis.
article_processing_charge: No
article_type: original
author:
- first_name: James E.
full_name: Rhoads, James E.
last_name: Rhoads
- first_name: Nino
full_name: Panagia, Nino
last_name: Panagia
- first_name: Rogier A.
full_name: Windhorst, Rogier A.
last_name: Windhorst
- first_name: Sangeeta
full_name: Malhotra, Sangeeta
last_name: Malhotra
- first_name: Norbert
full_name: Pirzkal, Norbert
last_name: Pirzkal
- first_name: Chun
full_name: Xu, Chun
last_name: Xu
- first_name: Louis Gregory
full_name: Strolger, Louis Gregory
last_name: Strolger
- first_name: Louis E.
full_name: Bergeron, Louis E.
last_name: Bergeron
- first_name: Emanuele
full_name: Daddi, Emanuele
last_name: Daddi
- first_name: Harry
full_name: Ferguson, Harry
last_name: Ferguson
- first_name: Jonathan P.
full_name: Gardner, Jonathan P.
last_name: Gardner
- first_name: Caryl
full_name: Gronwall, Caryl
last_name: Gronwall
- first_name: Zoltán
full_name: Haiman, Zoltán
id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36
last_name: Haiman
- first_name: Anton
full_name: Koekemoer, Anton
last_name: Koekemoer
- first_name: Martin
full_name: Kummel, Martin
last_name: Kummel
- first_name: Leonidas A.
full_name: Moustakas, Leonidas A.
last_name: Moustakas
- first_name: Anna
full_name: Pasquali, Anna
last_name: Pasquali
- first_name: Adam
full_name: Riess, Adam
last_name: Riess
- first_name: Sperello
full_name: di Serego Alighieri, Sperello
last_name: di Serego Alighieri
- first_name: Massimo
full_name: Stiavelli, Massimo
last_name: Stiavelli
- first_name: Zlatan
full_name: Tsvetanov, Zlatan
last_name: Tsvetanov
- first_name: Joel
full_name: Vernet, Joel
last_name: Vernet
- first_name: Jeremy
full_name: Walsh, Jeremy
last_name: Walsh
- first_name: Haojing
full_name: Yan, Haojing
last_name: Yan
citation:
ama: Rhoads JE, Panagia N, Windhorst RA, et al. A redshift z≈ 5.4 Lyα emitting galaxy
with linear morphology in the GRAPES/Hubble Ultra Deep Field. The Astrophysical
Journal. 2005;621(2):582-586. doi:10.1086/427622
apa: Rhoads, J. E., Panagia, N., Windhorst, R. A., Malhotra, S., Pirzkal, N., Xu,
C., … Yan, H. (2005). A redshift z≈ 5.4 Lyα emitting galaxy with linear morphology
in the GRAPES/Hubble Ultra Deep Field. The Astrophysical Journal. American
Astronomical Society. https://doi.org/10.1086/427622
chicago: Rhoads, James E., Nino Panagia, Rogier A. Windhorst, Sangeeta Malhotra,
Norbert Pirzkal, Chun Xu, Louis Gregory Strolger, et al. “A Redshift Z≈ 5.4 Lyα
Emitting Galaxy with Linear Morphology in the GRAPES/Hubble Ultra Deep Field.”
The Astrophysical Journal. American Astronomical Society, 2005. https://doi.org/10.1086/427622.
ieee: J. E. Rhoads et al., “A redshift z≈ 5.4 Lyα emitting galaxy with linear
morphology in the GRAPES/Hubble Ultra Deep Field,” The Astrophysical Journal,
vol. 621, no. 2. American Astronomical Society, pp. 582–586, 2005.
ista: Rhoads JE, Panagia N, Windhorst RA, Malhotra S, Pirzkal N, Xu C, Strolger
LG, Bergeron LE, Daddi E, Ferguson H, Gardner JP, Gronwall C, Haiman Z, Koekemoer
A, Kummel M, Moustakas LA, Pasquali A, Riess A, di Serego Alighieri S, Stiavelli
M, Tsvetanov Z, Vernet J, Walsh J, Yan H. 2005. A redshift z≈ 5.4 Lyα emitting
galaxy with linear morphology in the GRAPES/Hubble Ultra Deep Field. The Astrophysical
Journal. 621(2), 582–586.
mla: Rhoads, James E., et al. “A Redshift Z≈ 5.4 Lyα Emitting Galaxy with Linear
Morphology in the GRAPES/Hubble Ultra Deep Field.” The Astrophysical Journal,
vol. 621, no. 2, American Astronomical Society, 2005, pp. 582–86, doi:10.1086/427622.
short: J.E. Rhoads, N. Panagia, R.A. Windhorst, S. Malhotra, N. Pirzkal, C. Xu,
L.G. Strolger, L.E. Bergeron, E. Daddi, H. Ferguson, J.P. Gardner, C. Gronwall,
Z. Haiman, A. Koekemoer, M. Kummel, L.A. Moustakas, A. Pasquali, A. Riess, S.
di Serego Alighieri, M. Stiavelli, Z. Tsvetanov, J. Vernet, J. Walsh, H. Yan,
The Astrophysical Journal 621 (2005) 582–586.
date_created: 2024-09-06T10:15:40Z
date_published: 2005-05-10T00:00:00Z
date_updated: 2024-09-30T12:17:32Z
day: '10'
doi: 10.1086/427622
extern: '1'
intvolume: ' 621'
issue: '2'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1086/427622
month: '05'
oa: 1
oa_version: Published Version
page: 582-586
publication: The Astrophysical Journal
publication_identifier:
issn:
- 0004-637X
- 1538-4357
publication_status: published
publisher: American Astronomical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: A redshift z≈ 5.4 Lyα emitting galaxy with linear morphology in the GRAPES/Hubble
Ultra Deep Field
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 621
year: '2005'
...
---
_id: '17786'
abstract:
- lang: eng
text: "The first stars and black holes that formed in the Universe are likely too
faint for a direct detection. However, by ionizing most of the intergalactic medium
(IGM), they left an indirect clue that reveals their existence. We discuss currently
available observational constraints on the reionization history of IGM, and the
extent to which accreting black holes (BHs) and stars can help account for these
observations. We argue, based on the combined statistics of Lyman α and β absorption
in quasar spectra, that the IGM contains a significant amount of neutral hydrogen
with nHI/nH ≳0.1. On the other hand, we argue, based on the lack of a strong evolution
in the observed abundance of Lyman α emitting galaxies beyond z ∼5.5, that the
mean neutral hydrogen fraction cannot exceed nHI/nH ≈0.3 at the same redshift.
We conclude that the IGM is experiencing rapid ionization at redshift z ∼6.\r\nWe
find that quasar BHs, including faint ones that are individually below the detection
thresholds of existing optical and X-ray surveys, are unlikely to drive the evolution
of the neutral fraction around this epoch, because they would over-produce the
present-day soft X-ray background. On the other hand, the seeds of the z ∼6 quasar
BHs likely appeared at much earlier epochs (z ∼20), and produced hard ionizing
radiation by accretion. These early BHs are promising candidates to account for
the high redshift (z ∼15) ionization implied by the recent cosmic microwave anisotropy
data from WMAP.\r\nUsing a model for the growth of BHs by accretion and mergers
in a hierarchical cosmology, we suggest that the early growth of quasars must
include a super-Eddington growth phase, and that, although not yet optically identified,
the FIRST radio survey may have already detected several thousand > 10^8 M⊙ BHs
at z > 6."
article_processing_charge: No
article_type: original
author:
- first_name: Zoltán
full_name: Haiman, Zoltán
id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36
last_name: Haiman
citation:
ama: Haiman Z. Finding the first generation of stars and black holes. Progress
of Theoretical Physics Supplement. 2005;158:86-104. doi:10.1143/ptps.158.86
apa: Haiman, Z. (2005). Finding the first generation of stars and black holes. Progress
of Theoretical Physics Supplement. Oxford University Press. https://doi.org/10.1143/ptps.158.86
chicago: Haiman, Zoltán. “Finding the First Generation of Stars and Black Holes.”
Progress of Theoretical Physics Supplement. Oxford University Press, 2005.
https://doi.org/10.1143/ptps.158.86.
ieee: Z. Haiman, “Finding the first generation of stars and black holes,” Progress
of Theoretical Physics Supplement, vol. 158. Oxford University Press, pp.
86–104, 2005.
ista: Haiman Z. 2005. Finding the first generation of stars and black holes. Progress
of Theoretical Physics Supplement. 158, 86–104.
mla: Haiman, Zoltán. “Finding the First Generation of Stars and Black Holes.” Progress
of Theoretical Physics Supplement, vol. 158, Oxford University Press, 2005,
pp. 86–104, doi:10.1143/ptps.158.86.
short: Z. Haiman, Progress of Theoretical Physics Supplement 158 (2005) 86–104.
date_created: 2024-09-06T10:19:04Z
date_published: 2005-02-01T00:00:00Z
date_updated: 2024-09-30T13:00:29Z
day: '01'
doi: 10.1143/ptps.158.86
extern: '1'
intvolume: ' 158'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1143/PTPS.158.86
month: '02'
oa: 1
oa_version: Published Version
page: 86-104
publication: Progress of Theoretical Physics Supplement
publication_identifier:
issn:
- 0375-9687
publication_status: published
publisher: Oxford University Press
quality_controlled: '1'
scopus_import: '1'
status: public
title: Finding the first generation of stars and black holes
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 158
year: '2005'
...
---
_id: '9514'
abstract:
- lang: eng
text: "Background:\r\nDNA methylation occurs at preferred sites in eukaryotes. In
Arabidopsis, DNA cytosine methylation is maintained by three subfamilies of methyltransferases
with distinct substrate specificities and different modes of action. Targeting
of cytosine methylation at selected loci has been found to sometimes involve histone
H3 methylation and small interfering (si)RNAs. However, the relationship between
different cytosine methylation pathways and their preferred targets is not known.\r\nResults:\r\nWe
used a microarray-based profiling method to explore the involvement of Arabidopsis
CMT3 and DRM DNA methyltransferases, a histone H3 lysine-9 methyltransferase (KYP)
and an Argonaute-related siRNA silencing component (AGO4) in methylating target
loci. We found that KYP targets are also CMT3 targets, suggesting that histone
methylation maintains CNG methylation genome-wide. CMT3 and KYP targets show similar
proximal distributions that correspond to the overall distribution of transposable
elements of all types, whereas DRM targets are distributed more distally along
the chromosome. We find an inverse relationship between element size and loss
of methylation in ago4 and drm mutants.\r\nConclusion:\r\nWe conclude that the
targets of both DNA methylation and histone H3K9 methylation pathways are transposable
elements genome-wide, irrespective of element type and position. Our findings
also suggest that RNA-directed DNA methylation is required to silence isolated
elements that may be too small to be maintained in a silent state by a chromatin-based
mechanism alone. Thus, parallel pathways would be needed to maintain silencing
of transposable elements."
article_number: R90
article_processing_charge: No
article_type: original
author:
- first_name: Robert K.
full_name: Tran, Robert K.
last_name: Tran
- first_name: Daniel
full_name: Zilberman, Daniel
id: 6973db13-dd5f-11ea-814e-b3e5455e9ed1
last_name: Zilberman
orcid: 0000-0002-0123-8649
- first_name: Cecilia
full_name: de Bustos, Cecilia
last_name: de Bustos
- first_name: Renata F.
full_name: Ditt, Renata F.
last_name: Ditt
- first_name: Jorja G.
full_name: Henikoff, Jorja G.
last_name: Henikoff
- first_name: Anders M.
full_name: Lindroth, Anders M.
last_name: Lindroth
- first_name: Jeffrey
full_name: Delrow, Jeffrey
last_name: Delrow
- first_name: Tom
full_name: Boyle, Tom
last_name: Boyle
- first_name: Samson
full_name: Kwong, Samson
last_name: Kwong
- first_name: Terri D.
full_name: Bryson, Terri D.
last_name: Bryson
- first_name: Steven E.
full_name: Jacobsen, Steven E.
last_name: Jacobsen
- first_name: Steven
full_name: Henikoff, Steven
last_name: Henikoff
citation:
ama: Tran RK, Zilberman D, de Bustos C, et al. Chromatin and siRNA pathways cooperate
to maintain DNA methylation of small transposable elements in Arabidopsis. Genome
Biology. 2005;6(11). doi:10.1186/gb-2005-6-11-r90
apa: Tran, R. K., Zilberman, D., de Bustos, C., Ditt, R. F., Henikoff, J. G., Lindroth,
A. M., … Henikoff, S. (2005). Chromatin and siRNA pathways cooperate to maintain
DNA methylation of small transposable elements in Arabidopsis. Genome Biology.
Springer Nature. https://doi.org/10.1186/gb-2005-6-11-r90
chicago: Tran, Robert K., Daniel Zilberman, Cecilia de Bustos, Renata F. Ditt, Jorja
G. Henikoff, Anders M. Lindroth, Jeffrey Delrow, et al. “Chromatin and SiRNA Pathways
Cooperate to Maintain DNA Methylation of Small Transposable Elements in Arabidopsis.”
Genome Biology. Springer Nature, 2005. https://doi.org/10.1186/gb-2005-6-11-r90.
ieee: R. K. Tran et al., “Chromatin and siRNA pathways cooperate to maintain
DNA methylation of small transposable elements in Arabidopsis,” Genome Biology,
vol. 6, no. 11. Springer Nature, 2005.
ista: Tran RK, Zilberman D, de Bustos C, Ditt RF, Henikoff JG, Lindroth AM, Delrow
J, Boyle T, Kwong S, Bryson TD, Jacobsen SE, Henikoff S. 2005. Chromatin and siRNA
pathways cooperate to maintain DNA methylation of small transposable elements
in Arabidopsis. Genome Biology. 6(11), R90.
mla: Tran, Robert K., et al. “Chromatin and SiRNA Pathways Cooperate to Maintain
DNA Methylation of Small Transposable Elements in Arabidopsis.” Genome Biology,
vol. 6, no. 11, R90, Springer Nature, 2005, doi:10.1186/gb-2005-6-11-r90.
short: R.K. Tran, D. Zilberman, C. de Bustos, R.F. Ditt, J.G. Henikoff, A.M. Lindroth,
J. Delrow, T. Boyle, S. Kwong, T.D. Bryson, S.E. Jacobsen, S. Henikoff, Genome
Biology 6 (2005).
date_created: 2021-06-07T13:12:41Z
date_published: 2005-10-19T00:00:00Z
date_updated: 2021-12-14T09:09:41Z
day: '19'
department:
- _id: DaZi
doi: 10.1186/gb-2005-6-11-r90
extern: '1'
external_id:
pmid:
- '16277745'
intvolume: ' 6'
issue: '11'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1186/gb-2005-6-11-r90
month: '10'
oa: 1
oa_version: Published Version
pmid: 1
publication: Genome Biology
publication_identifier:
eissn:
- 1465-6906
issn:
- 1474-760X
publication_status: published
publisher: Springer Nature
quality_controlled: '1'
scopus_import: '1'
status: public
title: Chromatin and siRNA pathways cooperate to maintain DNA methylation of small
transposable elements in Arabidopsis
type: journal_article
user_id: 8b945eb4-e2f2-11eb-945a-df72226e66a9
volume: 6
year: '2005'
...
---
_id: '4624'
abstract:
- lang: eng
text: Surveying results from [5] and [6], we motivate and introduce the theory behind
formalizing rich interfaces for software and hardware components. Rich interfaces
specify the protocol aspects of component interaction. Their formalization, called
interface automata, permits a compiler to check the compatibility of component
interaction protocols. Interface automata support incremental design and independent
implementability. Incremental design means that the compatibility checking of
interfaces can proceed for partial system descriptions, without knowing the interfaces
of all components. Independent implementability means that compatible interfaces
can be refined separately, while still maintaining compatibility.
alternative_title:
- 'NATO Science Series: Mathematics, Physics, and Chemistry'
author:
- first_name: Luca
full_name: de Alfaro, Luca
last_name: De Alfaro
- first_name: Thomas A
full_name: Thomas Henzinger
id: 40876CD8-F248-11E8-B48F-1D18A9856A87
last_name: Henzinger
orcid: 0000−0002−2985−7724
citation:
ama: 'De Alfaro L, Henzinger TA. Interface-based design. In: Vol 195. Springer;
2005:83-104. doi:10.1007/1-4020-3532-2_3'
apa: De Alfaro, L., & Henzinger, T. A. (2005). Interface-based design (Vol.
195, pp. 83–104). Presented at the Engineering Theories of Software Intensive
Systems, Springer. https://doi.org/10.1007/1-4020-3532-2_3
chicago: De Alfaro, Luca, and Thomas A Henzinger. “Interface-Based Design,” 195:83–104.
Springer, 2005. https://doi.org/10.1007/1-4020-3532-2_3.
ieee: L. De Alfaro and T. A. Henzinger, “Interface-based design,” presented at the
Engineering Theories of Software Intensive Systems, 2005, vol. 195, pp. 83–104.
ista: 'De Alfaro L, Henzinger TA. 2005. Interface-based design. Engineering Theories
of Software Intensive Systems, NATO Science Series: Mathematics, Physics, and
Chemistry, vol. 195, 83–104.'
mla: De Alfaro, Luca, and Thomas A. Henzinger. Interface-Based Design. Vol.
195, Springer, 2005, pp. 83–104, doi:10.1007/1-4020-3532-2_3.
short: L. De Alfaro, T.A. Henzinger, in:, Springer, 2005, pp. 83–104.
conference:
name: Engineering Theories of Software Intensive Systems
date_created: 2018-12-11T12:09:49Z
date_published: 2005-07-15T00:00:00Z
date_updated: 2021-01-12T08:00:36Z
day: '15'
doi: 10.1007/1-4020-3532-2_3
extern: 1
intvolume: ' 195'
month: '07'
page: 83 - 104
publication_status: published
publisher: Springer
publist_id: '85'
quality_controlled: 0
status: public
title: Interface-based design
type: conference
volume: 195
year: '2005'
...
---
_id: '3721'
abstract:
- lang: eng
text: Recent advances in atomic force microscopy allowed globular and membrane proteins
to be mechanically unfolded on a single-molecule level. Presented is an extension
to the existing force spectroscopy experiments. While unfolding single bacteriorhodopsins
from native purple membranes, small oscillation amplitudes (6–9nm) were supplied
to the vertical displacement of the cantilever at a frequency of 3kHz. The phase
and amplitude response of the cantilever-protein system was converted to reveal
the elastic (conservative) and viscous (dissipative) contributions to the unfolding
process. The elastic response (stiffness) of the extended parts of the protein
were in the range of a few tens pN/nm and could be well described by the derivative
of the wormlike chain model. Discrete events in the viscous response coincided
with the unfolding of single secondary structure elements and were in the range
of 1μNs/m. In addition, these force modulation spectroscopy experiments revealed
novel mechanical unfolding intermediates of bacteriorhodopsin. We found that kinks
result in a loss of unfolding cooperativity in transmembrane helices. Reconstructing
force-distance spectra by the integration of amplitude-distance spectra verified
their position, offering a novel approach to detect intermediates during the forced
unfolding of single proteins.
author:
- first_name: Harald L
full_name: Harald Janovjak
id: 33BA6C30-F248-11E8-B48F-1D18A9856A87
last_name: Janovjak
orcid: 0000-0002-8023-9315
- first_name: Daniel
full_name: Mueller, Daniel J
last_name: Mueller
- first_name: Andrew
full_name: Humphris, Andrew D
last_name: Humphris
citation:
ama: Janovjak HL, Mueller D, Humphris A. Molecular force modulation spectroscopy
revealing the dynamic response of single bacteriorhodopsins. Biophysical Journal.
2005;88(2):1423-1431. doi:10.1529/biophysj.104.052746
apa: Janovjak, H. L., Mueller, D., & Humphris, A. (2005). Molecular force modulation
spectroscopy revealing the dynamic response of single bacteriorhodopsins. Biophysical
Journal. Biophysical Society. https://doi.org/10.1529/biophysj.104.052746
chicago: Janovjak, Harald L, Daniel Mueller, and Andrew Humphris. “Molecular Force
Modulation Spectroscopy Revealing the Dynamic Response of Single Bacteriorhodopsins.”
Biophysical Journal. Biophysical Society, 2005. https://doi.org/10.1529/biophysj.104.052746.
ieee: H. L. Janovjak, D. Mueller, and A. Humphris, “Molecular force modulation spectroscopy
revealing the dynamic response of single bacteriorhodopsins,” Biophysical Journal,
vol. 88, no. 2. Biophysical Society, pp. 1423–1431, 2005.
ista: Janovjak HL, Mueller D, Humphris A. 2005. Molecular force modulation spectroscopy
revealing the dynamic response of single bacteriorhodopsins. Biophysical Journal.
88(2), 1423–1431.
mla: Janovjak, Harald L., et al. “Molecular Force Modulation Spectroscopy Revealing
the Dynamic Response of Single Bacteriorhodopsins.” Biophysical Journal,
vol. 88, no. 2, Biophysical Society, 2005, pp. 1423–31, doi:10.1529/biophysj.104.052746.
short: H.L. Janovjak, D. Mueller, A. Humphris, Biophysical Journal 88 (2005) 1423–1431.
date_created: 2018-12-11T12:04:48Z
date_published: 2005-02-01T00:00:00Z
date_updated: 2021-01-12T07:51:43Z
day: '01'
doi: 10.1529/biophysj.104.052746
extern: 1
intvolume: ' 88'
issue: '2'
main_file_link:
- open_access: '1'
url: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1305144/
month: '02'
oa: 1
page: 1423 - 1431
publication: Biophysical Journal
publication_status: published
publisher: Biophysical Society
publist_id: '2509'
quality_controlled: 0
status: public
title: Molecular force modulation spectroscopy revealing the dynamic response of single
bacteriorhodopsins
type: journal_article
volume: 88
year: '2005'
...
---
_id: '3916'
abstract:
- lang: eng
text: Divergent reproductive interests of males and females often cause sexual conflict
[1] and [2]. Males of many species manipulate females by transferring seminal
fluids that boost female short-term fecundity while decreasing their life expectancy
and future reproductivity [3] and [4]. The life history of ants, however, is expected
to reduce sexual conflict; whereas most insect females show repeated phases of
mating and reproduction, antqueens mate only during a short period early in life
and undergo a lifelong commitment to their mates by storing sperm [5]. Furthermore,
sexual offspring can only be reared after a sterile worker force has been built
up [5]. Therefore, the males should also profit from a long female lifespan. In
the antCardiocondyla obscurior, mating indeed has a positive effect on the lifetime
reproductive success of queens. Queens that mated to either one fertile or one
sterilized male lived considerably longer and started laying eggs earlier than
virgin queens. Only queens that received viable sperm from fertile males showed
increased fecundity. The lack of a trade-off between fecundity and longevity is
unexpected, given evolutionary theories of aging [6]. Our data instead reveal
the existence of sexual cooperation in ants.
author:
- first_name: Alexandra
full_name: Schrempf, Alexandra
last_name: Schrempf
- first_name: Jürgen
full_name: Heinze, Jürgen
last_name: Heinze
- first_name: Sylvia
full_name: Cremer, Sylvia
id: 2F64EC8C-F248-11E8-B48F-1D18A9856A87
last_name: Cremer
orcid: 0000-0002-2193-3868
citation:
ama: 'Schrempf A, Heinze J, Cremer S. Sexual cooperation: mating increases longevity
in ant queens. Current Biology. 2005;15(3):267-270. doi:10.1016/j.cub.2005.01.036'
apa: 'Schrempf, A., Heinze, J., & Cremer, S. (2005). Sexual cooperation: mating
increases longevity in ant queens. Current Biology. Cell Press. https://doi.org/10.1016/j.cub.2005.01.036'
chicago: 'Schrempf, Alexandra, Jürgen Heinze, and Sylvia Cremer. “Sexual Cooperation:
Mating Increases Longevity in Ant Queens.” Current Biology. Cell Press,
2005. https://doi.org/10.1016/j.cub.2005.01.036.'
ieee: 'A. Schrempf, J. Heinze, and S. Cremer, “Sexual cooperation: mating increases
longevity in ant queens,” Current Biology, vol. 15, no. 3. Cell Press,
pp. 267–270, 2005.'
ista: 'Schrempf A, Heinze J, Cremer S. 2005. Sexual cooperation: mating increases
longevity in ant queens. Current Biology. 15(3), 267–270.'
mla: 'Schrempf, Alexandra, et al. “Sexual Cooperation: Mating Increases Longevity
in Ant Queens.” Current Biology, vol. 15, no. 3, Cell Press, 2005, pp.
267–70, doi:10.1016/j.cub.2005.01.036.'
short: A. Schrempf, J. Heinze, S. Cremer, Current Biology 15 (2005) 267–270.
date_created: 2018-12-11T12:05:52Z
date_published: 2005-02-08T00:00:00Z
date_updated: 2021-01-12T07:53:10Z
day: '08'
doi: 10.1016/j.cub.2005.01.036
extern: '1'
intvolume: ' 15'
issue: '3'
language:
- iso: eng
month: '02'
oa_version: None
page: 267 - 270
publication: Current Biology
publication_status: published
publisher: Cell Press
publist_id: '2238'
status: public
title: 'Sexual cooperation: mating increases longevity in ant queens'
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 15
year: '2005'
...
---
_id: '11762'
abstract:
- lang: eng
text: 'In this paper, we describe six algorithmic problems that arise in web search
engines and that are not or only partially solved: (1) Uniformly sampling of web
pages; (2) modeling the web graph; (3) finding duplicate hosts; (4) finding top
gainers and losers in data streams; (5) finding large dense bipartite graphs; and
(6) understanding how eigenvectors partition the web.'
article_processing_charge: No
article_type: original
author:
- first_name: Monika H
full_name: Henzinger, Monika H
id: 540c9bbd-f2de-11ec-812d-d04a5be85630
last_name: Henzinger
orcid: 0000-0002-5008-6530
citation:
ama: Henzinger M. Algorithmic challenges in web search engines. Internet Mathematics.
2004;1(1):115-123. doi:10.1080/15427951.2004.10129079
apa: Henzinger, M. (2004). Algorithmic challenges in web search engines. Internet
Mathematics. Internet Mathematics. https://doi.org/10.1080/15427951.2004.10129079
chicago: Henzinger, Monika. “Algorithmic Challenges in Web Search Engines.” Internet
Mathematics. Internet Mathematics, 2004. https://doi.org/10.1080/15427951.2004.10129079.
ieee: M. Henzinger, “Algorithmic challenges in web search engines,” Internet
Mathematics, vol. 1, no. 1. Internet Mathematics, pp. 115–123, 2004.
ista: Henzinger M. 2004. Algorithmic challenges in web search engines. Internet
Mathematics. 1(1), 115–123.
mla: Henzinger, Monika. “Algorithmic Challenges in Web Search Engines.” Internet
Mathematics, vol. 1, no. 1, Internet Mathematics, 2004, pp. 115–23, doi:10.1080/15427951.2004.10129079.
short: M. Henzinger, Internet Mathematics 1 (2004) 115–123.
date_created: 2022-08-08T11:55:53Z
date_published: 2004-01-01T00:00:00Z
date_updated: 2024-11-06T08:13:59Z
day: '01'
doi: 10.1080/15427951.2004.10129079
extern: '1'
intvolume: ' 1'
issue: '1'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1080/15427951.2004.10129079
month: '01'
oa: 1
oa_version: Published Version
page: 115-123
publication: Internet Mathematics
publication_identifier:
eissn:
- 1944-9488
issn:
- 1542-7951
publication_status: published
publisher: Internet Mathematics
quality_controlled: '1'
scopus_import: '1'
status: public
title: Algorithmic challenges in web search engines
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 1
year: '2004'
...
---
_id: '2644'
abstract:
- lang: eng
text: The release of GABA in synapses is modulated by presynaptic metabotropic glutamate
receptors (mGluRs). We tested whether GABA release to identified hippocampal neurons
is influenced by group III mGluR activation using the agonist L-(+)-2-amino-4-phosphonobutyric
acid (L-AP4) on inhibitory postsynaptic currents (IPSCs) evoked in CA1 interneurons
and pyramidal cells. In interneurons, characterized with biocytin and immunolabelling
for somatostatin, evoked IPSCs were depressed by 50 μM L-AP4 (activating mGluR4
and 8) to 68±6% of control, but they were rarely depressed in pyramidal cells
(96±4% of control). At 300-500 μM concentration (activating mGluR4, 7 and 8),
L-AP4 depressed IPSCs in both interneurons (to 70±6%) and pyramidal cells (to
67±4%). The change in trial-to-trial variability and in paired-pulse depression
indicated a presynaptic action. In interneurons, the degree of IPSC depression
was variable (to 9-87%), and a third of IPSCs were not affected by L-AP4. The
L-AP4-evoked IPSC depression was blocked by LY341495. The depression of IPSCs
was similar in O-LM cells and other interneurons. The lack of cell-type selectivity
and the similar efficacy of different concentrations of L-AP4 suggest that several
group III mGluRs are involved in the depression of IPSCs. Electron microscopic
immunocytochemistry confirmed that mGluR4, mGluR7a and mGluR8a occur in the presynaptic
active zone of GABAergic terminals on interneurons, but not on those innervating
pyramidal cells. The high variability of L-AP4-evoked IPSC suppression is in line
with the selective expression of presynaptic mGluRs by several distinct types
of GABAergic neuron innervating each interneuron type.
author:
- first_name: Naoki
full_name: Kogo, Naoki
last_name: Kogo
- first_name: Yannis
full_name: Dalezios, Yannis
last_name: Dalezios
- first_name: Marco
full_name: Capogna,Marco
last_name: Capogna
- first_name: Francesco
full_name: Ferraguti, Francesco
last_name: Ferraguti
- first_name: Ryuichi
full_name: Ryuichi Shigemoto
id: 499F3ABC-F248-11E8-B48F-1D18A9856A87
last_name: Shigemoto
orcid: 0000-0001-8761-9444
- first_name: Péter
full_name: Somogyi, Péter
last_name: Somogyi
citation:
ama: Kogo N, Dalezios Y, Capogna M, Ferraguti F, Shigemoto R, Somogyi P. Depression
of GABAergic input to identified hippocampal neurons by group III metabotropic
glutamate receptors in the rat. European Journal of Neuroscience. 2004;19(10):2727-2740.
doi:10.1111/j.0953-816X.2004.03394.x
apa: Kogo, N., Dalezios, Y., Capogna, M., Ferraguti, F., Shigemoto, R., & Somogyi,
P. (2004). Depression of GABAergic input to identified hippocampal neurons by
group III metabotropic glutamate receptors in the rat. European Journal of
Neuroscience. Wiley-Blackwell. https://doi.org/10.1111/j.0953-816X.2004.03394.x
chicago: Kogo, Naoki, Yannis Dalezios, Marco Capogna, Francesco Ferraguti, Ryuichi
Shigemoto, and Péter Somogyi. “Depression of GABAergic Input to Identified Hippocampal
Neurons by Group III Metabotropic Glutamate Receptors in the Rat.” European
Journal of Neuroscience. Wiley-Blackwell, 2004. https://doi.org/10.1111/j.0953-816X.2004.03394.x.
ieee: N. Kogo, Y. Dalezios, M. Capogna, F. Ferraguti, R. Shigemoto, and P. Somogyi,
“Depression of GABAergic input to identified hippocampal neurons by group III
metabotropic glutamate receptors in the rat,” European Journal of Neuroscience,
vol. 19, no. 10. Wiley-Blackwell, pp. 2727–2740, 2004.
ista: Kogo N, Dalezios Y, Capogna M, Ferraguti F, Shigemoto R, Somogyi P. 2004.
Depression of GABAergic input to identified hippocampal neurons by group III metabotropic
glutamate receptors in the rat. European Journal of Neuroscience. 19(10), 2727–2740.
mla: Kogo, Naoki, et al. “Depression of GABAergic Input to Identified Hippocampal
Neurons by Group III Metabotropic Glutamate Receptors in the Rat.” European
Journal of Neuroscience, vol. 19, no. 10, Wiley-Blackwell, 2004, pp. 2727–40,
doi:10.1111/j.0953-816X.2004.03394.x.
short: N. Kogo, Y. Dalezios, M. Capogna, F. Ferraguti, R. Shigemoto, P. Somogyi,
European Journal of Neuroscience 19 (2004) 2727–2740.
date_created: 2018-12-11T11:58:50Z
date_published: 2004-05-01T00:00:00Z
date_updated: 2021-01-12T06:58:46Z
day: '01'
doi: 10.1111/j.0953-816X.2004.03394.x
extern: 1
intvolume: ' 19'
issue: '10'
month: '05'
page: 2727 - 2740
publication: European Journal of Neuroscience
publication_status: published
publisher: Wiley-Blackwell
publist_id: '4255'
quality_controlled: 0
status: public
title: Depression of GABAergic input to identified hippocampal neurons by group III
metabotropic glutamate receptors in the rat
type: journal_article
volume: 19
year: '2004'
...
---
_id: '17725'
abstract:
- lang: eng
text: A bright quasar residing in a dense and largely neutral intergalactic medium
(IGM) at high redshifts (z > 6) will be surrounded by a large cosmological Stromgren
sphere. The quasar's spectrum will then show a sharp increase in resonant Lyman
line absorption at wavelengths approaching and shorter than that corresponding
to the Stromgren sphere's boundary along the line of sight. We show here that
simultaneously considering the measured absorption in two or more hydrogen Lyman
lines can provide the dynamical range required to detect this feature. We model
broad and robust features of the Lyman alpha and Lyman beta regions of the spectrum
of the z=6.28 quasar SDSS J1030+0524, using a hydrodynamical simulation. From
the steep wavelength-dependence of the inferred absorption opacity, we detect
the boundary of the Stromgren sphere at a proper distance of 6.0 +/- 0.2 Mpc away
from the source redshift. From the spectrum alone, we also find that beyond this
distance, cosmic hydrogen turns nearly neutral, with a neutral fraction of x_HI
> 0.2, and that the ionizing luminosity of this quasar is in the range (5.2 +/-
2.5) times 10^{56} photons/sec. The method presented here, when applied to future
quasars, can probe the complex topology of overlapping ionized regions, and can
be used to study the details of the reionization process.
article_processing_charge: No
article_type: original
author:
- first_name: Andrei
full_name: Mesinger, Andrei
last_name: Mesinger
- first_name: Zoltán
full_name: Haiman, Zoltán
id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36
last_name: Haiman
citation:
ama: Mesinger A, Haiman Z. Evidence of a cosmological Strömgren surface and of significant
neutral hydrogen surrounding the quasar SDSS J1030+0524. The Astrophysical
Journal. 2004;611(2):L69-L72. doi:10.1086/423935
apa: Mesinger, A., & Haiman, Z. (2004). Evidence of a cosmological Strömgren
surface and of significant neutral hydrogen surrounding the quasar SDSS J1030+0524.
The Astrophysical Journal. American Astronomical Society. https://doi.org/10.1086/423935
chicago: Mesinger, Andrei, and Zoltán Haiman. “Evidence of a Cosmological Strömgren
Surface and of Significant Neutral Hydrogen Surrounding the Quasar SDSS J1030+0524.”
The Astrophysical Journal. American Astronomical Society, 2004. https://doi.org/10.1086/423935.
ieee: A. Mesinger and Z. Haiman, “Evidence of a cosmological Strömgren surface and
of significant neutral hydrogen surrounding the quasar SDSS J1030+0524,” The
Astrophysical Journal, vol. 611, no. 2. American Astronomical Society, pp.
L69–L72, 2004.
ista: Mesinger A, Haiman Z. 2004. Evidence of a cosmological Strömgren surface and
of significant neutral hydrogen surrounding the quasar SDSS J1030+0524. The Astrophysical
Journal. 611(2), L69–L72.
mla: Mesinger, Andrei, and Zoltán Haiman. “Evidence of a Cosmological Strömgren
Surface and of Significant Neutral Hydrogen Surrounding the Quasar SDSS J1030+0524.”
The Astrophysical Journal, vol. 611, no. 2, American Astronomical Society,
2004, pp. L69–72, doi:10.1086/423935.
short: A. Mesinger, Z. Haiman, The Astrophysical Journal 611 (2004) L69–L72.
date_created: 2024-09-06T09:12:22Z
date_published: 2004-07-19T00:00:00Z
date_updated: 2024-09-25T14:12:20Z
day: '19'
doi: 10.1086/423935
extern: '1'
intvolume: ' 611'
issue: '2'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1086/423935
month: '07'
oa: 1
oa_version: Published Version
page: L69-L72
publication: The Astrophysical Journal
publication_identifier:
issn:
- 0004-637X
- 1538-4357
publication_status: published
publisher: American Astronomical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: Evidence of a cosmological Strömgren surface and of significant neutral hydrogen
surrounding the quasar SDSS J1030+0524
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 611
year: '2004'
...
---
_id: '17743'
abstract:
- lang: eng
text: We use a physically motivated semi-analytic model, based on the mass function
of dark matter halos, to predict the number of radio-loud quasars as a function
of redshift and luminosity. Simple models in which the central BH mass scales
with the velocity dispersion of its host halo as M(bh) sigma(halo)^5 have been
previously found to be consistent with a number of observations, including the
optical and X-ray quasar luminosity functions. We find that similar models, when
augmented with an empirical prescription for radio emission, overpredict the number
of faint (10 micro-Jy) radio sources by 1-2 orders of magnitude. This translates
into a more stringent constraint on the low-mass end of the quasar black hole
mass function than is available from the Hubble and Chandra Deep Fields. We interpret
this discrepancy as evidence that black holes with masses below 10^7 Msun are
either rare or are not as radio-loud as their more massive counterparts. Models
that exclude BHs with masses below 10^7 Msun are in agreement with the deepest
existing radio observations, but still produce a significant tail of high-redshift
objects. In the 1-10GHz bands, at the sensitivity of 10 micro-Jy, we find surface
densities of 100, 10, and 0.3 deg^-2 for sources located at z>6, 10, and 15, respectively.
The discovery of these sources with instruments such as the Allen Telescope Array
(ATA), Extended Very Large Array (EVLA), and the Square Kilometer Array (SKA)
would open a new window for the study of supermassive BHs at high redshift. We
also find surface densities of 0.1 deg^-2 at z > 6 for mJy sources that can be
used to study 21 cm absorption from the epoch of reionization. We suggest that,
although not yet optically identified, the FIRST survey may have already detected
10^3-10^4 such sources.
article_processing_charge: No
article_type: original
author:
- first_name: Zoltán
full_name: Haiman, Zoltán
id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36
last_name: Haiman
- first_name: Eliot
full_name: Quataert, Eliot
last_name: Quataert
- first_name: Geoffrey C.
full_name: Bower, Geoffrey C.
last_name: Bower
citation:
ama: 'Haiman Z, Quataert E, Bower GC. Modeling the counts of faint radio‐loud quasars:
Constraints on the supermassive black hole population and predictions for high
redshift. The Astrophysical Journal. 2004;612(2):698-705. doi:10.1086/422834'
apa: 'Haiman, Z., Quataert, E., & Bower, G. C. (2004). Modeling the counts of
faint radio‐loud quasars: Constraints on the supermassive black hole population
and predictions for high redshift. The Astrophysical Journal. American
Astronomical Society. https://doi.org/10.1086/422834'
chicago: 'Haiman, Zoltán, Eliot Quataert, and Geoffrey C. Bower. “Modeling the Counts
of Faint Radio‐loud Quasars: Constraints on the Supermassive Black Hole Population
and Predictions for High Redshift.” The Astrophysical Journal. American
Astronomical Society, 2004. https://doi.org/10.1086/422834.'
ieee: 'Z. Haiman, E. Quataert, and G. C. Bower, “Modeling the counts of faint radio‐loud
quasars: Constraints on the supermassive black hole population and predictions
for high redshift,” The Astrophysical Journal, vol. 612, no. 2. American
Astronomical Society, pp. 698–705, 2004.'
ista: 'Haiman Z, Quataert E, Bower GC. 2004. Modeling the counts of faint radio‐loud
quasars: Constraints on the supermassive black hole population and predictions
for high redshift. The Astrophysical Journal. 612(2), 698–705.'
mla: 'Haiman, Zoltán, et al. “Modeling the Counts of Faint Radio‐loud Quasars: Constraints
on the Supermassive Black Hole Population and Predictions for High Redshift.”
The Astrophysical Journal, vol. 612, no. 2, American Astronomical Society,
2004, pp. 698–705, doi:10.1086/422834.'
short: Z. Haiman, E. Quataert, G.C. Bower, The Astrophysical Journal 612 (2004)
698–705.
date_created: 2024-09-06T09:27:01Z
date_published: 2004-09-10T00:00:00Z
date_updated: 2024-09-26T14:20:17Z
day: '10'
doi: 10.1086/422834
extern: '1'
intvolume: ' 612'
issue: '2'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1086/422834
month: '09'
oa: 1
oa_version: Published Version
page: 698-705
publication: The Astrophysical Journal
publication_identifier:
issn:
- 0004-637X
- 1538-4357
publication_status: published
publisher: American Astronomical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: 'Modeling the counts of faint radio‐loud quasars: Constraints on the supermassive
black hole population and predictions for high redshift'
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 612
year: '2004'
...
---
_id: '17745'
abstract:
- lang: eng
text: We quantify and discuss the footprints of neutral hydrogen in the intergalactic
medium (IGM) on the spectra of high-redshift (z ~ 6) sources, using mock spectra
generated from hydrodynamical simulations of the IGM. We show that it should be
possible to extract relevant parameters, including the mean neutral fraction in
the IGM and the radius of the local cosmological Strömgren region, from the flux
distribution in the observed spectra of distant sources. We focus on quasars,
but a similar analysis is applicable to galaxies and gamma-ray burst (GRB) afterglows.
We explicitly include uncertainties in the spectral shape of the assumed source
template near the Lyα line. Our results suggest that a mean neutral hydrogen fraction,
xH, of unity can be statistically distinguished from xH ≈ 10^-2 by combining the
spectra of tens of bright (M ≈ -27) quasars. Alternatively, the same distinction
can be achieved using the spectra of several hundred sources that are ~100 times
fainter. Furthermore, if the radius of the Strömgren sphere can be independently
constrained to within ~10%, this distinction can be achieved using a single source.
The information derived from such spectra will help in settling the current debate
as to what extent the universe was reionized at redshifts near z ~ 6.
article_processing_charge: No
article_type: original
author:
- first_name: Andrei
full_name: Mesinger, Andrei
last_name: Mesinger
- first_name: Zoltán
full_name: Haiman, Zoltán
id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36
last_name: Haiman
- first_name: Renyue
full_name: Cen, Renyue
last_name: Cen
citation:
ama: Mesinger A, Haiman Z, Cen R. Probing the reionization history using the spectra
of high‐redshift sources. The Astrophysical Journal. 2004;613(1):23-35.
doi:10.1086/422898
apa: Mesinger, A., Haiman, Z., & Cen, R. (2004). Probing the reionization history
using the spectra of high‐redshift sources. The Astrophysical Journal.
American Astronomical Society. https://doi.org/10.1086/422898
chicago: Mesinger, Andrei, Zoltán Haiman, and Renyue Cen. “Probing the Reionization
History Using the Spectra of High‐redshift Sources.” The Astrophysical Journal.
American Astronomical Society, 2004. https://doi.org/10.1086/422898.
ieee: A. Mesinger, Z. Haiman, and R. Cen, “Probing the reionization history using
the spectra of high‐redshift sources,” The Astrophysical Journal, vol.
613, no. 1. American Astronomical Society, pp. 23–35, 2004.
ista: Mesinger A, Haiman Z, Cen R. 2004. Probing the reionization history using
the spectra of high‐redshift sources. The Astrophysical Journal. 613(1), 23–35.
mla: Mesinger, Andrei, et al. “Probing the Reionization History Using the Spectra
of High‐redshift Sources.” The Astrophysical Journal, vol. 613, no. 1,
American Astronomical Society, 2004, pp. 23–35, doi:10.1086/422898.
short: A. Mesinger, Z. Haiman, R. Cen, The Astrophysical Journal 613 (2004) 23–35.
date_created: 2024-09-06T09:34:05Z
date_published: 2004-09-20T00:00:00Z
date_updated: 2024-09-26T14:26:47Z
day: '20'
doi: 10.1086/422898
extern: '1'
intvolume: ' 613'
issue: '1'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1086/422898
month: '09'
oa: 1
oa_version: Published Version
page: 23-35
publication: The Astrophysical Journal
publication_identifier:
issn:
- 0004-637X
- 1538-4357
publication_status: published
publisher: American Astronomical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: Probing the reionization history using the spectra of high‐redshift sources
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 613
year: '2004'
...
---
_id: '17763'
abstract:
- lang: eng
text: Recent studies have suggested that during their coalescence, binary supermassive
black holes (SMBHs) experience typical gravitational recoil velocities that may
be as large as ≳100 km s^-1. These velocities exceed the escape velocity vesc
from typical dark matter (DM) halos at high redshift (z ≳ 6), and therefore put
constraints on scenarios in which early SMBHs grow at the centers of DM halos.
Here we quantify these constraints for the most distant known SMBH, with an inferred
mass in excess of 10^9 M☉, powering the bright quasar SDSS J1148+5251 discovered
in the Sloan Digital Sky Survey at z = 6.43. We assume that this SMBH grew via
a combination of accretion and mergers between preexisting seed BHs in individual
progenitor halos, and that mergers between progenitors with vesc < vkick disrupt
the BH growth process. Our results suggest that under these assumptions, the z
≈ 6 SMBHs had a phase during which they gained mass vary rapidly. In particular,
typical z ≈ 3 quasars with luminosities similar to that of SDSS J1148+5251 have
recently been inferred to have an average radiative efficiency of epsilon ≈ 20%.
The growth rate of the SMBH in SDSS J1148+5251 must have significantly exceeded
the Eddington accretion rate with this efficiency.
article_processing_charge: No
article_type: original
author:
- first_name: Zoltán
full_name: Haiman, Zoltán
id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36
last_name: Haiman
citation:
ama: Haiman Z. Constraints from gravitational recoil on the growth of supermassive
black holes at high redshift. The Astrophysical Journal. 2004;613(1):36-40.
doi:10.1086/422910
apa: Haiman, Z. (2004). Constraints from gravitational recoil on the growth of supermassive
black holes at high redshift. The Astrophysical Journal. American Astronomical
Society. https://doi.org/10.1086/422910
chicago: Haiman, Zoltán. “Constraints from Gravitational Recoil on the Growth of
Supermassive Black Holes at High Redshift.” The Astrophysical Journal.
American Astronomical Society, 2004. https://doi.org/10.1086/422910.
ieee: Z. Haiman, “Constraints from gravitational recoil on the growth of supermassive
black holes at high redshift,” The Astrophysical Journal, vol. 613, no.
1. American Astronomical Society, pp. 36–40, 2004.
ista: Haiman Z. 2004. Constraints from gravitational recoil on the growth of supermassive
black holes at high redshift. The Astrophysical Journal. 613(1), 36–40.
mla: Haiman, Zoltán. “Constraints from Gravitational Recoil on the Growth of Supermassive
Black Holes at High Redshift.” The Astrophysical Journal, vol. 613, no.
1, American Astronomical Society, 2004, pp. 36–40, doi:10.1086/422910.
short: Z. Haiman, The Astrophysical Journal 613 (2004) 36–40.
date_created: 2024-09-06T09:50:34Z
date_published: 2004-09-20T00:00:00Z
date_updated: 2024-09-30T09:12:19Z
day: '20'
doi: 10.1086/422910
extern: '1'
intvolume: ' 613'
issue: '1'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1086/422910
month: '09'
oa: 1
oa_version: Published Version
page: 36-40
publication: The Astrophysical Journal
publication_identifier:
issn:
- 0004-637X
- 1538-4357
publication_status: published
publisher: American Astronomical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: Constraints from gravitational recoil on the growth of supermassive black holes
at high redshift
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 613
year: '2004'
...
---
_id: '17775'
abstract:
- lang: eng
text: 'We discuss a simple model for the growth of supermassive black holes (BHs)
at the center of spheroidal stellar systems. In particular, we assess the hypotheses
that (1) star formation in spheroids and BH fueling are proportional to one another,
and (2) the BH accretion luminosity stays near the Eddington limit during luminous
quasar phases. With the aid of this simple model, we are able to interpret many
properties of the QSO luminosity function, including the puzzling steep decline
of the characteristic luminosity from redshift z=2 to to z=0: indeed the residual
star formation in spheroidal systems is today limited to a small number of bulges,
characterized by stellar velocity dispersions a factor of 2-3 smaller those of
the elliptical galaxies hosting QSOs at z > 2. A simple consequence of our hypotheses
is that the redshift evolution of the QSO emissivity and of the star formation
history in spheroids should be roughly parallel. We find this result to be broadly
consistent with our knowledge of the evolution of both the global star formation
rate, and of the evolution of the QSO emissivity, but we identify interesting
discrepancies at both low and high redshifts, to which we offer tentative solutions.
Finally, our hypotheses allow us to present a robust method to derive the duty
cycle of QSO activity, based on the observed QSO luminosity function, and on the
present-day relation between the masses of supermassive BHs and those of their
spheroidal host stellar systems. The duty cycle is found to be substantially less
than unity, with characteristic values in the range (3-6)x10^(-3), and we compute
that the average bolometric radiative efficiency is epsilon=0.07. Finally, we
find that the growth in mass of individual black holes at high redshift (z>2)
can be dominated by mergers, and is therefore not necessarily limited by accretion.'
article_processing_charge: No
article_type: original
author:
- first_name: Zoltán
full_name: Haiman, Zoltán
id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36
last_name: Haiman
- first_name: Luca
full_name: Ciotti, Luca
last_name: Ciotti
- first_name: Jeremiah P.
full_name: Ostriker, Jeremiah P.
last_name: Ostriker
citation:
ama: 'Haiman Z, Ciotti L, Ostriker JP. Reasoning from fossils: Learning from the
local black hole population about the evolution of quasars. The Astrophysical
Journal. 2004;606(2):763-773. doi:10.1086/383022'
apa: 'Haiman, Z., Ciotti, L., & Ostriker, J. P. (2004). Reasoning from fossils:
Learning from the local black hole population about the evolution of quasars.
The Astrophysical Journal. American Astronomical Society. https://doi.org/10.1086/383022'
chicago: 'Haiman, Zoltán, Luca Ciotti, and Jeremiah P. Ostriker. “Reasoning from
Fossils: Learning from the Local Black Hole Population about the Evolution of
Quasars.” The Astrophysical Journal. American Astronomical Society, 2004.
https://doi.org/10.1086/383022.'
ieee: 'Z. Haiman, L. Ciotti, and J. P. Ostriker, “Reasoning from fossils: Learning
from the local black hole population about the evolution of quasars,” The Astrophysical
Journal, vol. 606, no. 2. American Astronomical Society, pp. 763–773, 2004.'
ista: 'Haiman Z, Ciotti L, Ostriker JP. 2004. Reasoning from fossils: Learning from
the local black hole population about the evolution of quasars. The Astrophysical
Journal. 606(2), 763–773.'
mla: 'Haiman, Zoltán, et al. “Reasoning from Fossils: Learning from the Local Black
Hole Population about the Evolution of Quasars.” The Astrophysical Journal,
vol. 606, no. 2, American Astronomical Society, 2004, pp. 763–73, doi:10.1086/383022.'
short: Z. Haiman, L. Ciotti, J.P. Ostriker, The Astrophysical Journal 606 (2004)
763–773.
date_created: 2024-09-06T10:07:44Z
date_published: 2004-05-10T00:00:00Z
date_updated: 2024-09-30T11:41:03Z
day: '10'
doi: 10.1086/383022
extern: '1'
intvolume: ' 606'
issue: '2'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1086/383022
month: '05'
oa: 1
oa_version: Published Version
page: 763-773
publication: The Astrophysical Journal
publication_identifier:
issn:
- 0004-637X
- 1538-4357
publication_status: published
publisher: American Astronomical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: 'Reasoning from fossils: Learning from the local black hole population about
the evolution of quasars'
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 606
year: '2004'
...
---
_id: '17790'
abstract:
- lang: eng
text: Over the last few years, the Sloan Digital Sky Survey (SDSS) has discovered
several hundred quasars with redshift between 4.0 and 6.4. Including the effects
of magnification bias, one expects a priori that an appreciable fraction of these
objects are gravitationally lensed. We have used the Advanced Camera for Surveys
on the Hubble Space Telescope to carry out a snapshot imaging survey of high-redshift
SDSS quasars to search for gravitationally split lenses. This paper, the first
in a series reporting the results of the survey, describes snapshot observations
of four quasars at z = 5.74, 5.82, 5.99, and 6.30, respectively. We find that
none of these objects has a lensed companion within 5 mag with a separation larger
than 0farcs3; within 2.5 mag we can rule out companions within 0farcs1. Based
on the nondetection of strong lensing in these four systems, we constrain the
z ∼ 6 luminosity function to a slope of β > -4.63 (3 σ), assuming a break in the
quasar luminosity function at M = -24.1. We discuss the implications of this constraint
on the ionizing background due to quasars in the early universe. Given that these
quasars are not highly magnified, estimates of the masses of their central engines
by the Eddington argument must be taken seriously, possibly challenging models
of black hole formation.
article_processing_charge: No
article_type: original
author:
- first_name: Gordon T.
full_name: Richards, Gordon T.
last_name: Richards
- first_name: Michael A.
full_name: Strauss, Michael A.
last_name: Strauss
- first_name: Bartosz
full_name: Pindor, Bartosz
last_name: Pindor
- first_name: Zoltán
full_name: Haiman, Zoltán
id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36
last_name: Haiman
- first_name: Xiaohui
full_name: Fan, Xiaohui
last_name: Fan
- first_name: Daniel
full_name: Eisenstein, Daniel
last_name: Eisenstein
- first_name: Donald P.
full_name: Schneider, Donald P.
last_name: Schneider
- first_name: Neta A.
full_name: Bahcall, Neta A.
last_name: Bahcall
- first_name: J.
full_name: Brinkmann, J.
last_name: Brinkmann
- first_name: Robert
full_name: Brunner, Robert
last_name: Brunner
citation:
ama: Richards GT, Strauss MA, Pindor B, et al. A snapshot survey for gravitational
lenses among z ≥ 4.0 quasars. I. The z >5.7 sample. The Astronomical Journal.
2004;127(3):1305-1312. doi:10.1086/381906
apa: Richards, G. T., Strauss, M. A., Pindor, B., Haiman, Z., Fan, X., Eisenstein,
D., … Brunner, R. (2004). A snapshot survey for gravitational lenses among z ≥
4.0 quasars. I. The z >5.7 sample. The Astronomical Journal. American
Astronomical Society. https://doi.org/10.1086/381906
chicago: Richards, Gordon T., Michael A. Strauss, Bartosz Pindor, Zoltán Haiman,
Xiaohui Fan, Daniel Eisenstein, Donald P. Schneider, Neta A. Bahcall, J. Brinkmann,
and Robert Brunner. “A Snapshot Survey for Gravitational Lenses among z ≥ 4.0
Quasars. I. The z >5.7 Sample.” The Astronomical Journal. American
Astronomical Society, 2004. https://doi.org/10.1086/381906.
ieee: G. T. Richards et al., “A snapshot survey for gravitational lenses
among z ≥ 4.0 quasars. I. The z >5.7 sample,” The Astronomical Journal,
vol. 127, no. 3. American Astronomical Society, pp. 1305–1312, 2004.
ista: Richards GT, Strauss MA, Pindor B, Haiman Z, Fan X, Eisenstein D, Schneider
DP, Bahcall NA, Brinkmann J, Brunner R. 2004. A snapshot survey for gravitational
lenses among z ≥ 4.0 quasars. I. The z >5.7 sample. The Astronomical Journal.
127(3), 1305–1312.
mla: Richards, Gordon T., et al. “A Snapshot Survey for Gravitational Lenses among
z ≥ 4.0 Quasars. I. The z >5.7 Sample.” The Astronomical Journal, vol.
127, no. 3, American Astronomical Society, 2004, pp. 1305–12, doi:10.1086/381906.
short: G.T. Richards, M.A. Strauss, B. Pindor, Z. Haiman, X. Fan, D. Eisenstein,
D.P. Schneider, N.A. Bahcall, J. Brinkmann, R. Brunner, The Astronomical Journal
127 (2004) 1305–1312.
date_created: 2024-09-06T10:22:30Z
date_published: 2004-03-01T00:00:00Z
date_updated: 2024-09-30T13:53:57Z
day: '01'
doi: 10.1086/381906
extern: '1'
intvolume: ' 127'
issue: '3'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1086/381906
month: '03'
oa: 1
oa_version: Published Version
page: 1305-1312
publication: The Astronomical Journal
publication_identifier:
issn:
- 0004-6256
- 1538-3881
publication_status: published
publisher: American Astronomical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: A snapshot survey for gravitational lenses among z ≥ 4.0 quasars. I. The z
>5.7 sample
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 127
year: '2004'
...
---
OA_place: repository
OA_type: free access
_id: '17806'
abstract:
- lang: eng
text: A population of black holes (BHs) at high redshifts (z ≳ 6) that contributes
significantly to the ionization of the intergalactic medium (IGM) would be accompanied
by the copious production of hard (≳10 keV) X-ray photons. The resulting hard
X-ray background would redshift and be observed as a present-day soft X-ray background
(SXB). Under the hypothesis that BHs are the main producers of reionizing photons
in the high-redshift universe, we calculate their contribution to the present-day
SXB. We find that accreting BHs with a hard spectrum (be it luminous quasars or
their lower mass "miniquasar" counterparts) could not fully reionize the universe
without saturating the unresolved component of the 0.5-2 keV SXB at the ≥2 σ level.
Distant miniquasars that produce enough X-rays to only partially ionize the IGM
to a level of at most xe ~ 50% saturate the unresolved SXB by ≲1 σ. Improved determinations
of the unresolved component of the SXB can provide a powerful constraint on the
contribution of accreting BHs to partial or full reionization.
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Mark
full_name: Dijkstra, Mark
last_name: Dijkstra
- first_name: Zoltán
full_name: Haiman, Zoltán
id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36
last_name: Haiman
orcid: 0000-0003-3633-5403
- first_name: Abraham
full_name: Loeb, Abraham
last_name: Loeb
citation:
ama: Dijkstra M, Haiman Z, Loeb A. A limit from the X‐ray background on the contribution
of quasars to reionization. The Astrophysical Journal. 2004;613(2):646-654.
doi:10.1086/422167
apa: Dijkstra, M., Haiman, Z., & Loeb, A. (2004). A limit from the X‐ray background
on the contribution of quasars to reionization. The Astrophysical Journal.
American Astronomical Society. https://doi.org/10.1086/422167
chicago: Dijkstra, Mark, Zoltán Haiman, and Abraham Loeb. “A Limit from the X‐ray
Background on the Contribution of Quasars to Reionization.” The Astrophysical
Journal. American Astronomical Society, 2004. https://doi.org/10.1086/422167.
ieee: M. Dijkstra, Z. Haiman, and A. Loeb, “A limit from the X‐ray background on
the contribution of quasars to reionization,” The Astrophysical Journal,
vol. 613, no. 2. American Astronomical Society, pp. 646–654, 2004.
ista: Dijkstra M, Haiman Z, Loeb A. 2004. A limit from the X‐ray background on the
contribution of quasars to reionization. The Astrophysical Journal. 613(2), 646–654.
mla: Dijkstra, Mark, et al. “A Limit from the X‐ray Background on the Contribution
of Quasars to Reionization.” The Astrophysical Journal, vol. 613, no. 2,
American Astronomical Society, 2004, pp. 646–54, doi:10.1086/422167.
short: M. Dijkstra, Z. Haiman, A. Loeb, The Astrophysical Journal 613 (2004) 646–654.
date_created: 2024-09-06T11:34:30Z
date_published: 2004-10-01T00:00:00Z
date_updated: 2024-11-12T10:16:58Z
day: '01'
doi: 10.1086/422167
extern: '1'
external_id:
arxiv:
- astro-ph/0403078
intvolume: ' 613'
issue: '2'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.48550/arXiv.astro-ph/0403078
month: '10'
oa: 1
oa_version: Preprint
page: 646-654
publication: The Astrophysical Journal
publication_identifier:
eissn:
- 1538-4357
issn:
- 0004-637X
publication_status: published
publisher: American Astronomical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: A limit from the X‐ray background on the contribution of quasars to reionization
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 613
year: '2004'
...
---
_id: '3918'
abstract:
- lang: eng
text: Wingless (ergatoid) males of the tramp ant Cardiocondyla minutior attack and
kill their young ergatoid rivals and thus attempt to monopolize mating with female
sexuals reared in the colony. Because of the different strength of local mate
competition in colonies with one or several reproductive queens, we expected the
production of new ergatoid males to vary with queen number. Sex ratios were mostly
female-biased, but in contrast to the sympatric species C. obscurior (Cremer and
Heinze, 2002) neither the percentage of ergatoid males nor of female sexuals among
the first 20 sexuals produced varied considerably with queen number. As in C.
obscurior, experimental colony fragmentation led to the production of winged males,
whereas in unfragmented control colonies only ergatoid males eclosed.
author:
- first_name: Jürgen
full_name: Heinze, Jürgen
last_name: Heinze
- first_name: A.
full_name: Böttcher, A.
last_name: Böttcher
- first_name: Sylvia
full_name: Cremer, Sylvia
id: 2F64EC8C-F248-11E8-B48F-1D18A9856A87
last_name: Cremer
orcid: 0000-0002-2193-3868
citation:
ama: Heinze J, Böttcher A, Cremer S. Production of winged and wingless males in
the ant, Cardiocondyla minutior. Insectes Sociaux. 2004;51(3):275-278.
doi:10.1007/s00040-004-0740-6
apa: Heinze, J., Böttcher, A., & Cremer, S. (2004). Production of winged and
wingless males in the ant, Cardiocondyla minutior. Insectes Sociaux. Springer.
https://doi.org/10.1007/s00040-004-0740-6
chicago: Heinze, Jürgen, A. Böttcher, and Sylvia Cremer. “Production of Winged and
Wingless Males in the Ant, Cardiocondyla Minutior.” Insectes Sociaux. Springer,
2004. https://doi.org/10.1007/s00040-004-0740-6.
ieee: J. Heinze, A. Böttcher, and S. Cremer, “Production of winged and wingless
males in the ant, Cardiocondyla minutior,” Insectes Sociaux, vol. 51, no.
3. Springer, pp. 275–278, 2004.
ista: Heinze J, Böttcher A, Cremer S. 2004. Production of winged and wingless males
in the ant, Cardiocondyla minutior. Insectes Sociaux. 51(3), 275–278.
mla: Heinze, Jürgen, et al. “Production of Winged and Wingless Males in the Ant,
Cardiocondyla Minutior.” Insectes Sociaux, vol. 51, no. 3, Springer, 2004,
pp. 275–78, doi:10.1007/s00040-004-0740-6.
short: J. Heinze, A. Böttcher, S. Cremer, Insectes Sociaux 51 (2004) 275–278.
date_created: 2018-12-11T12:05:53Z
date_published: 2004-08-19T00:00:00Z
date_updated: 2021-01-12T07:53:11Z
day: '19'
doi: 10.1007/s00040-004-0740-6
extern: '1'
intvolume: ' 51'
issue: '3'
language:
- iso: eng
month: '08'
oa_version: None
page: 275 - 278
publication: Insectes Sociaux
publication_status: published
publisher: Springer
publist_id: '2236'
status: public
title: Production of winged and wingless males in the ant, Cardiocondyla minutior
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 51
year: '2004'
...
---
_id: '3985'
abstract:
- lang: eng
text: Given a Morse function f over a 2-manifold with or without boundary, the Reeb
graph is obtained by contracting the connected components of the level sets to
points. We prove tight upper and lower bounds on the number of loops in the Reeb
graph that depend on the genus, the number of boundary components, and whether
or not the 2-manifold is orientable. We also give an algorithm that constructs
the Reeb graph in time O(n log n), where n is the number of edges in the triangulation
used to represent the 2-manifold and the Morse function.
acknowledgement: Partially supported by NSF under Grants EIA-99-72879 and CCR-00-86013.
author:
- first_name: Kree
full_name: Cole-McLaughlin, Kree
last_name: Cole Mclaughlin
- first_name: Herbert
full_name: Herbert Edelsbrunner
id: 3FB178DA-F248-11E8-B48F-1D18A9856A87
last_name: Edelsbrunner
orcid: 0000-0002-9823-6833
- first_name: John
full_name: Harer, John
last_name: Harer
- first_name: Vijay
full_name: Natarajan, Vijay
last_name: Natarajan
- first_name: Valerio
full_name: Pascucci, Valerio
last_name: Pascucci
citation:
ama: Cole Mclaughlin K, Edelsbrunner H, Harer J, Natarajan V, Pascucci V. Loops
in Reeb graphs of 2-manifolds. Discrete & Computational Geometry. 2004;32(2):231-244.
doi:10.1007/s00454-004-1122-6
apa: Cole Mclaughlin, K., Edelsbrunner, H., Harer, J., Natarajan, V., & Pascucci,
V. (2004). Loops in Reeb graphs of 2-manifolds. Discrete & Computational
Geometry. Springer. https://doi.org/10.1007/s00454-004-1122-6
chicago: Cole Mclaughlin, Kree, Herbert Edelsbrunner, John Harer, Vijay Natarajan,
and Valerio Pascucci. “Loops in Reeb Graphs of 2-Manifolds.” Discrete &
Computational Geometry. Springer, 2004. https://doi.org/10.1007/s00454-004-1122-6.
ieee: K. Cole Mclaughlin, H. Edelsbrunner, J. Harer, V. Natarajan, and V. Pascucci,
“Loops in Reeb graphs of 2-manifolds,” Discrete & Computational Geometry,
vol. 32, no. 2. Springer, pp. 231–244, 2004.
ista: Cole Mclaughlin K, Edelsbrunner H, Harer J, Natarajan V, Pascucci V. 2004.
Loops in Reeb graphs of 2-manifolds. Discrete & Computational Geometry. 32(2),
231–244.
mla: Cole Mclaughlin, Kree, et al. “Loops in Reeb Graphs of 2-Manifolds.” Discrete
& Computational Geometry, vol. 32, no. 2, Springer, 2004, pp. 231–44,
doi:10.1007/s00454-004-1122-6.
short: K. Cole Mclaughlin, H. Edelsbrunner, J. Harer, V. Natarajan, V. Pascucci,
Discrete & Computational Geometry 32 (2004) 231–244.
date_created: 2018-12-11T12:06:16Z
date_published: 2004-07-01T00:00:00Z
date_updated: 2021-01-12T07:53:39Z
day: '01'
doi: 10.1007/s00454-004-1122-6
extern: 1
intvolume: ' 32'
issue: '2'
month: '07'
page: 231 - 244
publication: Discrete & Computational Geometry
publication_status: published
publisher: Springer
publist_id: '2140'
quality_controlled: 0
status: public
title: Loops in Reeb graphs of 2-manifolds
type: journal_article
volume: 32
year: '2004'
...
---
_id: '11766'
abstract:
- lang: eng
text: 'This paper studies the multicast routing and admission control problem on
unit-capacity tree and mesh topologies in the throughput model. The problem is
a generalization of the edge-disjoint paths problem and is NP-hard both on trees
and meshes. We study both the offline and the online version of the problem: In
the offline setting, we give the first constant-factor approximation algorithm
for trees, and an -factor approximation algorithm for meshes. In the online setting,
we give the first polylogarithmic competitive online algorithm for tree and mesh
topologies. No polylogarithmic-competitive algorithm is possible on general network
topologies (Lower bounds for on-line graph problems with application to on-line
circuits and optical routing, in: Proceedings of the 28th ACM Symposium on Theory
of Computing, 1996, pp. 531–540) and there exists a polylogarithmic lower bound
on the competitive ratio of any online algorithm on tree topologies (Making commitments
in the face of uncertainity: how to pick a winner almost every time, in: Proceedings
of the 28th Annual ACM Symposium on Theory of Computing, 1996, pp. 519–530). We
prove the same lower bound for meshes.'
article_processing_charge: No
article_type: original
author:
- first_name: Monika H
full_name: Henzinger, Monika H
id: 540c9bbd-f2de-11ec-812d-d04a5be85630
last_name: Henzinger
orcid: 0000-0002-5008-6530
- first_name: Stefano
full_name: Leonardi, Stefano
last_name: Leonardi
citation:
ama: Henzinger M, Leonardi S. Scheduling multicasts on unit-capacity trees and meshes.
Journal of Computer and System Sciences. 2003;66(3):567-611. doi:10.1016/s0022-0000(03)00043-6
apa: Henzinger, M., & Leonardi, S. (2003). Scheduling multicasts on unit-capacity
trees and meshes. Journal of Computer and System Sciences. Elsevier. https://doi.org/10.1016/s0022-0000(03)00043-6
chicago: Henzinger, Monika, and Stefano Leonardi. “Scheduling Multicasts on Unit-Capacity
Trees and Meshes.” Journal of Computer and System Sciences. Elsevier, 2003.
https://doi.org/10.1016/s0022-0000(03)00043-6.
ieee: M. Henzinger and S. Leonardi, “Scheduling multicasts on unit-capacity trees
and meshes,” Journal of Computer and System Sciences, vol. 66, no. 3. Elsevier,
pp. 567–611, 2003.
ista: Henzinger M, Leonardi S. 2003. Scheduling multicasts on unit-capacity trees
and meshes. Journal of Computer and System Sciences. 66(3), 567–611.
mla: Henzinger, Monika, and Stefano Leonardi. “Scheduling Multicasts on Unit-Capacity
Trees and Meshes.” Journal of Computer and System Sciences, vol. 66, no.
3, Elsevier, 2003, pp. 567–611, doi:10.1016/s0022-0000(03)00043-6.
short: M. Henzinger, S. Leonardi, Journal of Computer and System Sciences 66 (2003)
567–611.
date_created: 2022-08-08T12:24:35Z
date_published: 2003-05-01T00:00:00Z
date_updated: 2024-11-06T08:21:23Z
day: '01'
doi: 10.1016/s0022-0000(03)00043-6
extern: '1'
intvolume: ' 66'
issue: '3'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1016/S0022-0000(03)00043-6
month: '05'
oa: 1
oa_version: Published Version
page: 567-611
publication: Journal of Computer and System Sciences
publication_identifier:
issn:
- 0022-0000
publication_status: published
publisher: Elsevier
quality_controlled: '1'
scopus_import: '1'
status: public
title: Scheduling multicasts on unit-capacity trees and meshes
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 66
year: '2003'
...
---
_id: '2631'
abstract:
- lang: eng
text: Cyclic ADP-ribose (cADP-ribose) is a putative second messenger or modulator.
However, the role of cADP-ribose in the downstream signals of the metabotropic
glutamate receptors (mGluRs) is unclear. Here, we show that glutamate stimulates
ADP-ribosyl cyclase activity in rat or mouse crude membranes of retina via group
III mGluRs or in superior cervical ganglion via group I mGluRs. The retina of
mGluR6-deficient mice showed no increase in the ADP-ribosyl cyclase level in response
to glutamate. GTP enhanced the initial rate of basal and glutamate-stimulated
cyclase activity. GTP-γ-S also stimulated basal activity. To determine whether
the coupling mode of mGluRs to ADP-ribosyl cyclase is a feature common to individual
cloned mGluRs, we expressed each mGluR subtype in NG108-15 neuroblastoma x glioma
hybrid cells. The glutamate-induced stimulation of the cyclase occurs preferentially
in NG108-15 cells over-expressing mGluRs1, 3, 5, and 6. Cells expressing mGluR2
or mGluRs4 and 7 exhibit inhibition or no coupling, respectively. Glutamate-induced
activation or inhibition of the cyclase activity was eliminated after pre-treatment
with cholera or pertussis toxin, respectively. Thus, the subtype-specific coupling
of mGluRs to ADP-ribosyl cyclase via G proteins suggests that some glutamate-evoked
neuronal functions are mediated by cADP-ribose.
author:
- first_name: Haruhiro
full_name: Higashida, Haruhiro
last_name: Higashida
- first_name: Jia
full_name: Zhang, Jia-Sheng
last_name: Zhang
- first_name: Sumiko
full_name: Mochida, Sumiko
last_name: Mochida
- first_name: Xiao
full_name: Chen, Xiao-Liang
last_name: Chen
- first_name: Yeonsook
full_name: Shin, Yeonsook
last_name: Shin
- first_name: Mami
full_name: Noda, Mami
last_name: Noda
- first_name: Kazi
full_name: Hossain, Kazi Z
last_name: Hossain
- first_name: Naoto
full_name: Hoshi, Naoto
last_name: Hoshi
- first_name: Minako
full_name: Hashii, Minako
last_name: Hashii
- first_name: Ryuichi
full_name: Ryuichi Shigemoto
id: 499F3ABC-F248-11E8-B48F-1D18A9856A87
last_name: Shigemoto
orcid: 0000-0001-8761-9444
- first_name: Shigetada
full_name: Nakanishi, Shigetada
last_name: Nakanishi
- first_name: Yutaka
full_name: Fukuda, Yutaka
last_name: Fukuda
- first_name: Shigeru
full_name: Yokoyama, Shigeru
last_name: Yokoyama
citation:
ama: Higashida H, Zhang J, Mochida S, et al. Subtype-specific coupling with ADP-ribosyl
cyclase of metabotropic glutamate receptors in retina, cervical superior ganglion
and NG108-15 cells. Journal of Neurochemistry. 2003;85(5):1148-1158. doi:10.1046/j.1471-4159.2003.01751.x
apa: Higashida, H., Zhang, J., Mochida, S., Chen, X., Shin, Y., Noda, M., … Yokoyama,
S. (2003). Subtype-specific coupling with ADP-ribosyl cyclase of metabotropic
glutamate receptors in retina, cervical superior ganglion and NG108-15 cells.
Journal of Neurochemistry. Wiley-Blackwell. https://doi.org/10.1046/j.1471-4159.2003.01751.x
chicago: Higashida, Haruhiro, Jia Zhang, Sumiko Mochida, Xiao Chen, Yeonsook Shin,
Mami Noda, Kazi Hossain, et al. “Subtype-Specific Coupling with ADP-Ribosyl Cyclase
of Metabotropic Glutamate Receptors in Retina, Cervical Superior Ganglion and
NG108-15 Cells.” Journal of Neurochemistry. Wiley-Blackwell, 2003. https://doi.org/10.1046/j.1471-4159.2003.01751.x.
ieee: H. Higashida et al., “Subtype-specific coupling with ADP-ribosyl cyclase
of metabotropic glutamate receptors in retina, cervical superior ganglion and
NG108-15 cells,” Journal of Neurochemistry, vol. 85, no. 5. Wiley-Blackwell,
pp. 1148–1158, 2003.
ista: Higashida H, Zhang J, Mochida S, Chen X, Shin Y, Noda M, Hossain K, Hoshi
N, Hashii M, Shigemoto R, Nakanishi S, Fukuda Y, Yokoyama S. 2003. Subtype-specific
coupling with ADP-ribosyl cyclase of metabotropic glutamate receptors in retina,
cervical superior ganglion and NG108-15 cells. Journal of Neurochemistry. 85(5),
1148–1158.
mla: Higashida, Haruhiro, et al. “Subtype-Specific Coupling with ADP-Ribosyl Cyclase
of Metabotropic Glutamate Receptors in Retina, Cervical Superior Ganglion and
NG108-15 Cells.” Journal of Neurochemistry, vol. 85, no. 5, Wiley-Blackwell,
2003, pp. 1148–58, doi:10.1046/j.1471-4159.2003.01751.x.
short: H. Higashida, J. Zhang, S. Mochida, X. Chen, Y. Shin, M. Noda, K. Hossain,
N. Hoshi, M. Hashii, R. Shigemoto, S. Nakanishi, Y. Fukuda, S. Yokoyama, Journal
of Neurochemistry 85 (2003) 1148–1158.
date_created: 2018-12-11T11:58:46Z
date_published: 2003-06-01T00:00:00Z
date_updated: 2021-01-12T06:58:42Z
day: '01'
doi: 10.1046/j.1471-4159.2003.01751.x
extern: 1
intvolume: ' 85'
issue: '5'
month: '06'
page: 1148 - 1158
publication: Journal of Neurochemistry
publication_status: published
publisher: Wiley-Blackwell
publist_id: '4268'
quality_controlled: 0
status: public
title: Subtype-specific coupling with ADP-ribosyl cyclase of metabotropic glutamate
receptors in retina, cervical superior ganglion and NG108-15 cells
type: journal_article
volume: 85
year: '2003'
...