---
_id: '48'
abstract:
- lang: eng
text: 'The hippocampus is a key brain region for spatial memory and navigation and
is needed at all stages of memory, including encoding, consolidation, and recall.
Hippocampal place cells selectively discharge at specific locations of the environment
to form a cognitive map of the space. During the rest period and sleep following
spatial navigation and/or learning, the waking activity of the place cells is
reactivated within high synchrony events. This reactivation is thought to be important
for memory consolidation and stabilization of the spatial representations. The
aim of my thesis was to directly test whether the reactivation content encoded
in firing patterns of place cells is important for consolidation of spatial memories.
In particular, I aimed to test whether, in cases when multiple spatial memory
traces are acquired during learning, the specific disruption of the reactivation
of a subset of these memories leads to the selective disruption of the corresponding
memory traces or through memory interference the other learned memories are disrupted
as well. In this thesis, using a modified cheeseboard paradigm and a closed-loop
recording setup with feedback optogenetic stimulation, I examined how the disruption
of the reactivation of specific spiking patterns affects consolidation of the
corresponding memory traces. To obtain multiple distinctive memories, animals
had to perform a spatial task in two distinct cheeseboard environments and the
reactivation of spiking patterns associated with one of the environments (target)
was disrupted after learning during four hours rest period using a real-time decoding
method. This real-time decoding method was capable of selectively affecting the
firing rates and cofiring correlations of the target environment-encoding cells.
The selective disruption led to behavioural impairment in the memory tests after
the rest periods in the target environment but not in the other undisrupted control
environment. In addition, the map of the target environment was less stable in
the impaired memory tests compared to the learning session before than the map
of the control environment. However, when the animal relearned the task, the same
map recurred in the target environment that was present during learning before
the disruption. Altogether my work demonstrated that the reactivation content
is important: assembly-related disruption of reactivation can lead to a selective
memory impairment and deficiency in map stability. These findings indeed suggest
that reactivated assembly patterns reflect processes associated with the consolidation
of memory traces. '
alternative_title:
- ISTA Thesis
article_processing_charge: No
author:
- first_name: Igor
full_name: Gridchyn, Igor
id: 4B60654C-F248-11E8-B48F-1D18A9856A87
last_name: Gridchyn
orcid: 0000-0002-1807-1929
citation:
ama: Gridchyn I. Reactivation content is important for consolidation of spatial
memory. 2018. doi:10.15479/AT:ISTA:th_1042
apa: Gridchyn, I. (2018). Reactivation content is important for consolidation
of spatial memory. Institute of Science and Technology Austria. https://doi.org/10.15479/AT:ISTA:th_1042
chicago: Gridchyn, Igor. “Reactivation Content Is Important for Consolidation of
Spatial Memory.” Institute of Science and Technology Austria, 2018. https://doi.org/10.15479/AT:ISTA:th_1042.
ieee: I. Gridchyn, “Reactivation content is important for consolidation of spatial
memory,” Institute of Science and Technology Austria, 2018.
ista: Gridchyn I. 2018. Reactivation content is important for consolidation of spatial
memory. Institute of Science and Technology Austria.
mla: Gridchyn, Igor. Reactivation Content Is Important for Consolidation of Spatial
Memory. Institute of Science and Technology Austria, 2018, doi:10.15479/AT:ISTA:th_1042.
short: I. Gridchyn, Reactivation Content Is Important for Consolidation of Spatial
Memory, Institute of Science and Technology Austria, 2018.
date_created: 2018-12-11T11:44:21Z
date_published: 2018-08-27T00:00:00Z
date_updated: 2023-09-07T12:42:44Z
day: '27'
ddc:
- '573'
degree_awarded: PhD
department:
- _id: JoCs
doi: 10.15479/AT:ISTA:th_1042
file:
- access_level: closed
checksum: 7db4415e435590fa33542c7b0a0321d7
content_type: application/vnd.openxmlformats-officedocument.wordprocessingml.document
creator: dernst
date_created: 2019-04-08T13:36:01Z
date_updated: 2021-02-11T23:30:22Z
embargo_to: open_access
file_id: '6236'
file_name: 2018_Thesis_Gridchyn_source.docx
file_size: 7666687
relation: source_file
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checksum: f96f3fe8979f7b1e6db6acaca962b10c
content_type: application/pdf
creator: dernst
date_created: 2019-04-08T13:36:01Z
date_updated: 2021-02-11T11:17:18Z
embargo: 2019-08-29
file_id: '6237'
file_name: 2018_Thesis_Gridchyn.pdf
file_size: 6034153
relation: main_file
file_date_updated: 2021-02-11T23:30:22Z
has_accepted_license: '1'
language:
- iso: eng
license: https://creativecommons.org/licenses/by/4.0/
month: '08'
oa: 1
oa_version: Published Version
page: '104'
publication_identifier:
issn:
- 2663-337X
publication_status: published
publisher: Institute of Science and Technology Austria
publist_id: '8006'
pubrep_id: '1042'
status: public
supervisor:
- first_name: Jozsef L
full_name: Csicsvari, Jozsef L
id: 3FA14672-F248-11E8-B48F-1D18A9856A87
last_name: Csicsvari
orcid: 0000-0002-5193-4036
title: Reactivation content is important for consolidation of spatial memory
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: dissertation
user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1
year: '2018'
...
---
_id: '49'
abstract:
- lang: eng
text: Nowadays, quantum computation is receiving more and more attention as an alternative
to the classical way of computing. For realizing a quantum computer, different
devices are investigated as potential quantum bits. In this thesis, the focus
is on Ge hut wires, which turned out to be promising candidates for implementing
hole spin quantum bits. The advantages of Ge as a material system are the low
hyperfine interaction for holes and the strong spin orbit coupling, as well as
the compatibility with the highly developed CMOS processes in industry. In addition,
Ge can also be isotopically purified which is expected to boost the spin coherence
times. The strong spin orbit interaction for holes in Ge on the one hand enables
the full electrical control of the quantum bit and on the other hand should allow
short spin manipulation times. Starting with a bare Si wafer, this work covers
the entire process reaching from growth over the fabrication and characterization
of hut wire devices up to the demonstration of hole spin resonance. From experiments
with single quantum dots, a large g-factor anisotropy between the in-plane and
the out-of-plane direction was found. A comparison to a theoretical model unveiled
the heavy-hole character of the lowest energy states. The second part of the thesis
addresses double quantum dot devices, which were realized by adding two gate electrodes
to a hut wire. In such devices, Pauli spin blockade was observed, which can serve
as a read-out mechanism for spin quantum bits. Applying oscillating electric fields
in spin blockade allowed the demonstration of continuous spin rotations and the
extraction of a lower bound for the spin dephasing time. Despite the strong spin
orbit coupling in Ge, the obtained value for the dephasing time is comparable
to what has been recently reported for holes in Si. All in all, the presented
results point out the high potential of Ge hut wires as a platform for long-lived,
fast and fully electrically tunable hole spin quantum bits.
alternative_title:
- ISTA Thesis
article_processing_charge: No
author:
- first_name: Hannes
full_name: Watzinger, Hannes
id: 35DF8E50-F248-11E8-B48F-1D18A9856A87
last_name: Watzinger
citation:
ama: Watzinger H. Ge hut wires - from growth to hole spin resonance. 2018. doi:10.15479/AT:ISTA:th_1033
apa: Watzinger, H. (2018). Ge hut wires - from growth to hole spin resonance.
Institute of Science and Technology Austria. https://doi.org/10.15479/AT:ISTA:th_1033
chicago: Watzinger, Hannes. “Ge Hut Wires - from Growth to Hole Spin Resonance.”
Institute of Science and Technology Austria, 2018. https://doi.org/10.15479/AT:ISTA:th_1033.
ieee: H. Watzinger, “Ge hut wires - from growth to hole spin resonance,” Institute
of Science and Technology Austria, 2018.
ista: Watzinger H. 2018. Ge hut wires - from growth to hole spin resonance. Institute
of Science and Technology Austria.
mla: Watzinger, Hannes. Ge Hut Wires - from Growth to Hole Spin Resonance.
Institute of Science and Technology Austria, 2018, doi:10.15479/AT:ISTA:th_1033.
short: H. Watzinger, Ge Hut Wires - from Growth to Hole Spin Resonance, Institute
of Science and Technology Austria, 2018.
date_created: 2018-12-11T11:44:21Z
date_published: 2018-07-30T00:00:00Z
date_updated: 2023-09-07T12:27:43Z
day: '30'
ddc:
- '530'
degree_awarded: PhD
department:
- _id: GeKa
doi: 10.15479/AT:ISTA:th_1033
file:
- access_level: open_access
checksum: b653b5216251f938ddbeafd1de88667c
content_type: application/pdf
creator: dernst
date_created: 2019-04-09T07:13:28Z
date_updated: 2020-07-14T12:46:35Z
file_id: '6249'
file_name: 2018_Thesis_Watzinger.pdf
file_size: 85539748
relation: main_file
- access_level: closed
checksum: 39bcf8de7ac5b1bb516b11ce2f966785
content_type: application/zip
creator: dernst
date_created: 2019-04-09T07:13:27Z
date_updated: 2020-07-14T12:46:35Z
file_id: '6250'
file_name: 2018_Thesis_Watzinger_source.zip
file_size: 21830697
relation: source_file
file_date_updated: 2020-07-14T12:46:35Z
has_accepted_license: '1'
language:
- iso: eng
month: '07'
oa: 1
oa_version: Published Version
page: '77'
publication_identifier:
issn:
- 2663-337X
publication_status: published
publisher: Institute of Science and Technology Austria
publist_id: '8005'
pubrep_id: '1033'
status: public
supervisor:
- first_name: Georgios
full_name: Katsaros, Georgios
id: 38DB5788-F248-11E8-B48F-1D18A9856A87
last_name: Katsaros
orcid: 0000-0001-8342-202X
title: Ge hut wires - from growth to hole spin resonance
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: dissertation
user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1
year: '2018'
...
---
_id: '50'
abstract:
- lang: eng
text: The Wnt/planar cell polarity (Wnt/PCP) pathway determines planar polarity
of epithelial cells in both vertebrates and invertebrates. The role that Wnt/PCP
signaling plays in mesenchymal contexts, however, is only poorly understood. While
previous studies have demonstrated the capacity of Wnt/PCP signaling to polarize
and guide directed migration of mesenchymal cells, it remains unclear whether
endogenous Wnt/PCP signaling performs these functions instructively, as it does
in epithelial cells. Here we developed a light-switchable version of the Wnt/PCP
receptor Frizzled 7 (Fz7) to unambiguously distinguish between an instructive
and a permissive role of Wnt/PCP signaling for the directional collective migration
of mesendoderm progenitor cells during zebrafish gastrulation. We show that prechordal
plate (ppl) cell migration is defective in maternal-zygotic fz7a and fz7b (MZ
fz7a,b) double mutant embryos, and that Fz7 functions cell-autonomously in this
process by promoting ppl cell protrusion formation and directed migration. We
further show that local activation of Fz7 can direct ppl cell migration both in
vitro and in vivo. Surprisingly, however, uniform Fz7 activation is sufficient
to fully rescue the ppl cell migration defect in MZ fz7a,b mutant embryos, indicating
that Wnt/PCP signaling functions permissively rather than instructively in directed
mesendoderm cell migration during zebrafish gastrulation.
alternative_title:
- ISTA Thesis
article_processing_charge: No
author:
- first_name: Daniel
full_name: Capek, Daniel
id: 31C42484-F248-11E8-B48F-1D18A9856A87
last_name: Capek
orcid: 0000-0001-5199-9940
citation:
ama: Capek D. Optogenetic Frizzled 7 reveals a permissive function of Wnt/PCP signaling
in directed mesenchymal cell migration. 2018. doi:10.15479/AT:ISTA:TH_1031
apa: Capek, D. (2018). Optogenetic Frizzled 7 reveals a permissive function of
Wnt/PCP signaling in directed mesenchymal cell migration. Institute of Science
and Technology Austria. https://doi.org/10.15479/AT:ISTA:TH_1031
chicago: Capek, Daniel. “Optogenetic Frizzled 7 Reveals a Permissive Function of
Wnt/PCP Signaling in Directed Mesenchymal Cell Migration.” Institute of Science
and Technology Austria, 2018. https://doi.org/10.15479/AT:ISTA:TH_1031.
ieee: D. Capek, “Optogenetic Frizzled 7 reveals a permissive function of Wnt/PCP
signaling in directed mesenchymal cell migration,” Institute of Science and Technology
Austria, 2018.
ista: Capek D. 2018. Optogenetic Frizzled 7 reveals a permissive function of Wnt/PCP
signaling in directed mesenchymal cell migration. Institute of Science and Technology
Austria.
mla: Capek, Daniel. Optogenetic Frizzled 7 Reveals a Permissive Function of Wnt/PCP
Signaling in Directed Mesenchymal Cell Migration. Institute of Science and
Technology Austria, 2018, doi:10.15479/AT:ISTA:TH_1031.
short: D. Capek, Optogenetic Frizzled 7 Reveals a Permissive Function of Wnt/PCP
Signaling in Directed Mesenchymal Cell Migration, Institute of Science and Technology
Austria, 2018.
date_created: 2018-12-11T11:44:21Z
date_published: 2018-06-22T00:00:00Z
date_updated: 2023-09-07T12:48:16Z
day: '22'
ddc:
- '570'
- '591'
- '596'
degree_awarded: PhD
department:
- _id: CaHe
doi: 10.15479/AT:ISTA:TH_1031
file:
- access_level: open_access
checksum: d3eca3dcacb67bffdde6e6609c31cdd0
content_type: application/pdf
creator: dernst
date_created: 2019-04-08T13:42:26Z
date_updated: 2021-02-11T11:17:17Z
embargo: 2019-06-25
file_id: '6238'
file_name: 2018_Thesis_Capek.pdf
file_size: 31576521
relation: main_file
- access_level: closed
checksum: 876deb14067e638aba65d209668bd821
content_type: application/vnd.openxmlformats-officedocument.wordprocessingml.document
creator: dernst
date_created: 2019-04-08T13:42:27Z
date_updated: 2021-02-11T23:30:21Z
embargo_to: open_access
file_id: '6239'
file_name: 2018_Thesis_Capek_source.docx
file_size: 38992956
relation: source_file
file_date_updated: 2021-02-11T23:30:21Z
has_accepted_license: '1'
language:
- iso: eng
month: '06'
oa: 1
oa_version: Published Version
page: '95'
publication_identifier:
issn:
- 2663-337X
publication_status: published
publisher: Institute of Science and Technology Austria
publist_id: '8004'
pubrep_id: '1031'
related_material:
record:
- id: '1100'
relation: part_of_dissertation
status: public
- id: '661'
relation: part_of_dissertation
status: public
- id: '676'
relation: part_of_dissertation
status: public
status: public
supervisor:
- first_name: Carl-Philipp J
full_name: Heisenberg, Carl-Philipp J
id: 39427864-F248-11E8-B48F-1D18A9856A87
last_name: Heisenberg
orcid: 0000-0002-0912-4566
title: Optogenetic Frizzled 7 reveals a permissive function of Wnt/PCP signaling in
directed mesenchymal cell migration
type: dissertation
user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1
year: '2018'
...
---
_id: '503'
abstract:
- lang: eng
text: Buffers are essential for diluting bacterial cultures for flow cytometry analysis
in order to study bacterial physiology and gene expression parameters based on
fluorescence signals. Using a variety of constitutively expressed fluorescent
proteins in Escherichia coli K-12 strain MG1655, we found strong artifactual changes
in fluorescence levels after dilution into the commonly used flow cytometry buffer
phosphate-buffered saline (PBS) and two other buffer solutions, Tris-HCl and M9
salts. These changes appeared very rapidly after dilution, and were linked to
increased membrane permeability and loss in cell viability. We observed buffer-related
effects in several different E. coli strains, K-12, C and W, but not E. coli B,
which can be partially explained by differences in lipopolysaccharide (LPS) and
outer membrane composition. Supplementing the buffers with divalent cations responsible
for outer membrane stability, Mg2+ and Ca2+, preserved fluorescence signals, membrane
integrity and viability of E. coli. Thus, stabilizing the bacterial outer membrane
is essential for precise and unbiased measurements of fluorescence parameters
using flow cytometry.
acknowledged_ssus:
- _id: Bio
acknowledgement: "We thank R Chait and M Lagator for sharing Bacillus subtilis CR_Y1
and pZS*_2R-cIPtet-Venus-Prm, respectively. We are grateful to T Pilizota and all
members of the Guet lab for critically reading the manuscript. We also thank the
Bioimaging facility at IST Austria for assistance using the FACSAria III system.\r\n\r\n"
article_processing_charge: No
author:
- first_name: Kathrin
full_name: Tomasek, Kathrin
id: 3AEC8556-F248-11E8-B48F-1D18A9856A87
last_name: Tomasek
orcid: 0000-0003-3768-877X
- first_name: Tobias
full_name: Bergmiller, Tobias
id: 2C471CFA-F248-11E8-B48F-1D18A9856A87
last_name: Bergmiller
orcid: 0000-0001-5396-4346
- first_name: Calin C
full_name: Guet, Calin C
id: 47F8433E-F248-11E8-B48F-1D18A9856A87
last_name: Guet
orcid: 0000-0001-6220-2052
citation:
ama: Tomasek K, Bergmiller T, Guet CC. Lack of cations in flow cytometry buffers
affect fluorescence signals by reducing membrane stability and viability of Escherichia
coli strains. Journal of Biotechnology. 2018;268:40-52. doi:10.1016/j.jbiotec.2018.01.008
apa: Tomasek, K., Bergmiller, T., & Guet, C. C. (2018). Lack of cations in flow
cytometry buffers affect fluorescence signals by reducing membrane stability and
viability of Escherichia coli strains. Journal of Biotechnology. Elsevier.
https://doi.org/10.1016/j.jbiotec.2018.01.008
chicago: Tomasek, Kathrin, Tobias Bergmiller, and Calin C Guet. “Lack of Cations
in Flow Cytometry Buffers Affect Fluorescence Signals by Reducing Membrane Stability
and Viability of Escherichia Coli Strains.” Journal of Biotechnology. Elsevier,
2018. https://doi.org/10.1016/j.jbiotec.2018.01.008.
ieee: K. Tomasek, T. Bergmiller, and C. C. Guet, “Lack of cations in flow cytometry
buffers affect fluorescence signals by reducing membrane stability and viability
of Escherichia coli strains,” Journal of Biotechnology, vol. 268. Elsevier,
pp. 40–52, 2018.
ista: Tomasek K, Bergmiller T, Guet CC. 2018. Lack of cations in flow cytometry
buffers affect fluorescence signals by reducing membrane stability and viability
of Escherichia coli strains. Journal of Biotechnology. 268, 40–52.
mla: Tomasek, Kathrin, et al. “Lack of Cations in Flow Cytometry Buffers Affect
Fluorescence Signals by Reducing Membrane Stability and Viability of Escherichia
Coli Strains.” Journal of Biotechnology, vol. 268, Elsevier, 2018, pp.
40–52, doi:10.1016/j.jbiotec.2018.01.008.
short: K. Tomasek, T. Bergmiller, C.C. Guet, Journal of Biotechnology 268 (2018)
40–52.
date_created: 2018-12-11T11:46:50Z
date_published: 2018-02-20T00:00:00Z
date_updated: 2023-09-13T08:24:51Z
day: '20'
department:
- _id: CaGu
doi: 10.1016/j.jbiotec.2018.01.008
external_id:
isi:
- '000425715100006'
intvolume: ' 268'
isi: 1
language:
- iso: eng
month: '02'
oa_version: None
page: 40 - 52
publication: Journal of Biotechnology
publication_status: published
publisher: Elsevier
publist_id: '7317'
quality_controlled: '1'
scopus_import: '1'
status: public
title: Lack of cations in flow cytometry buffers affect fluorescence signals by reducing
membrane stability and viability of Escherichia coli strains
type: journal_article
user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1
volume: 268
year: '2018'
...
---
_id: '51'
abstract:
- lang: eng
text: Asymmetries have long been known about in the central nervous system. From
gross anatomical differences, such as the presence of the parapineal organ in
only one hemisphere of the developing zebrafish, to more subtle differences in
activity between both hemispheres, as seen in freely roaming animals or human
participants under PET and fMRI imaging analysis. The presence of asymmetries
has been demonstrated to have huge behavioural implications, with their disruption
often leading to the generation of neurological disorders, memory problems, changes
in personality, and in an organism's health and well-being. For my Ph.D. work
I aimed to tackle two important avenues of research. The first being the process
of input-side dependency in the hippocampus, with the goal of finding a key gene
responsible for its development (Gene X). The second project was to do with experience-induced
laterality formation in the hippocampus. Specifically, how laterality in the synapse
density of the CA1 stratum radiatum (s.r.) could be induced purely through environmental
enrichment. Through unilateral tracer injections into the CA3, I was able to selectively
measure the properties of synapses within the CA1 and investigate how they differed
based upon which hemisphere the presynaptic neurone originated. Having found the
existence of a previously unreported reversed (left-isomerism) i.v. mutant, through
morpholocal examination of labelled terminals in the CA1 s.r., I aimed to elucidate
a key gene responsible for the process of left or right determination of inputs
to the CA1 s.r.. This work relates to the previous finding of input-side dependent
asymmetry in the wild-type rodent, where the origin of the projecting neurone
to the CA1 will determine the morphology of a synapse, to a greater degree than
the hemisphere in which the projection terminates. Using left- and right-isomerism
i.v. mice, in combination with whole genome sequence analysis, I highlight Ena/VASP-like
(Evl) as a potential target for Gene X. In relation to this topic, I also highlight
my work in the recently published paper of how knockout of PirB can lead to a
lack of input-side dependency in the murine hippocampus. For the second question,
I show that the environmental enrichment paradigm will lead to an asymmetry in
the synapse densities in the hippocampus of mice. I also highlight that the nature
of the enrichment is of less consequence than the process of enrichment itself.
I demonstrate that the CA3 region will dramatically alter its projection targets,
in relation to environmental stimulation, with the asymmetry in synaptic density,
caused by enrichment, relying heavily on commissural fibres. I also highlight
the vital importance of input-side dependent asymmetry, as a necessary component
of experience-dependent laterality formation in the CA1 s.r.. However, my results
suggest that it isn't the only cause, as there appears to be a CA1 dependent mechanism
also at play. Upon further investigation, I highlight the significant, and highly
important, finding that the changes seen in the CA1 s.r. were predominantly caused
through projections from the left-CA3, with the right-CA3 having less involvement
in this mechanism.
alternative_title:
- ISTA Thesis
article_processing_charge: No
author:
- first_name: Matthew J
full_name: Case, Matthew J
id: 44B7CA5A-F248-11E8-B48F-1D18A9856A87
last_name: Case
citation:
ama: 'Case MJ. From the left to the right: A tale of asymmetries, environments,
and hippocampal development. 2018. doi:10.15479/AT:ISTA:th_1032'
apa: 'Case, M. J. (2018). From the left to the right: A tale of asymmetries,
environments, and hippocampal development. Institute of Science and Technology
Austria. https://doi.org/10.15479/AT:ISTA:th_1032'
chicago: 'Case, Matthew J. “From the Left to the Right: A Tale of Asymmetries, Environments,
and Hippocampal Development.” Institute of Science and Technology Austria, 2018.
https://doi.org/10.15479/AT:ISTA:th_1032.'
ieee: 'M. J. Case, “From the left to the right: A tale of asymmetries, environments,
and hippocampal development,” Institute of Science and Technology Austria, 2018.'
ista: 'Case MJ. 2018. From the left to the right: A tale of asymmetries, environments,
and hippocampal development. Institute of Science and Technology Austria.'
mla: 'Case, Matthew J. From the Left to the Right: A Tale of Asymmetries, Environments,
and Hippocampal Development. Institute of Science and Technology Austria,
2018, doi:10.15479/AT:ISTA:th_1032.'
short: 'M.J. Case, From the Left to the Right: A Tale of Asymmetries, Environments,
and Hippocampal Development, Institute of Science and Technology Austria, 2018.'
date_created: 2018-12-11T11:44:22Z
date_published: 2018-06-27T00:00:00Z
date_updated: 2023-09-07T12:39:22Z
day: '27'
ddc:
- '571'
- '576'
degree_awarded: PhD
department:
- _id: RySh
doi: 10.15479/AT:ISTA:th_1032
file:
- access_level: closed
checksum: dcc7b55619d8509dd62b8e99d6cdee44
content_type: application/msword
creator: dernst
date_created: 2019-04-09T07:16:26Z
date_updated: 2021-02-11T23:30:13Z
embargo_to: open_access
file_id: '6251'
file_name: 2018_Thesis_Case_Source.doc
file_size: 141270528
relation: source_file
- access_level: open_access
checksum: f69fdd5c8709c4e618aa8c1a1221153d
content_type: application/pdf
creator: dernst
date_created: 2019-04-09T07:16:23Z
date_updated: 2021-02-11T11:17:14Z
embargo: 2019-07-05
file_id: '6252'
file_name: 2018_Thesis_Case.pdf
file_size: 15193621
relation: main_file
file_date_updated: 2021-02-11T23:30:13Z
has_accepted_license: '1'
language:
- iso: eng
month: '06'
oa: 1
oa_version: Published Version
page: '186'
publication_identifier:
issn:
- 2663-337X
publication_status: published
publisher: Institute of Science and Technology Austria
publist_id: '8003'
pubrep_id: '1032'
related_material:
record:
- id: '682'
relation: part_of_dissertation
status: public
status: public
supervisor:
- first_name: Ryuichi
full_name: Shigemoto, Ryuichi
id: 499F3ABC-F248-11E8-B48F-1D18A9856A87
last_name: Shigemoto
orcid: 0000-0001-8761-9444
title: 'From the left to the right: A tale of asymmetries, environments, and hippocampal
development'
type: dissertation
user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1
year: '2018'
...
---
_id: '519'
abstract:
- lang: eng
text: 'This study treats with the influence of a symmetry-breaking transversal magnetic
field on the nonlinear dynamics of ferrofluidic Taylor-Couette flow – flow confined
between two concentric independently rotating cylinders. We detected alternating
‘flip’ solutions which are flow states featuring typical characteristics of slow-fast-dynamics
in dynamical systems. The flip corresponds to a temporal change in the axial wavenumber
and we find them to appear either as pure 2-fold axisymmetric (due to the symmetry-breaking
nature of the applied transversal magnetic field) or involving non-axisymmetric,
helical modes in its interim solution. The latter ones show features of typical
ribbon solutions. In any case the flip solutions have a preferential first axial
wavenumber which corresponds to the more stable state (slow dynamics) and second
axial wavenumber, corresponding to the short appearing more unstable state (fast
dynamics). However, in both cases the flip time grows exponential with increasing
the magnetic field strength before the flip solutions, living on 2-tori invariant
manifolds, cease to exist, with lifetime going to infinity. Further we show that
ferrofluidic flow turbulence differ from the classical, ordinary (usually at high
Reynolds number) turbulence. The applied magnetic field hinders the free motion
of ferrofluid partials and therefore smoothen typical turbulent quantities and
features so that speaking of mildly chaotic dynamics seems to be a more appropriate
expression for the observed motion. '
acknowledgement: S.Altmeyer is a Serra Húnter Fellow
article_processing_charge: No
article_type: original
author:
- first_name: Sebastian
full_name: Altmeyer, Sebastian
id: 2EE67FDC-F248-11E8-B48F-1D18A9856A87
last_name: Altmeyer
orcid: 0000-0001-5964-0203
citation:
ama: Altmeyer S. Non-linear dynamics and alternating ‘flip’ solutions in ferrofluidic
Taylor-Couette flow. Journal of Magnetism and Magnetic Materials. 2018;452:427-441.
doi:10.1016/j.jmmm.2017.12.073
apa: Altmeyer, S. (2018). Non-linear dynamics and alternating ‘flip’ solutions in
ferrofluidic Taylor-Couette flow. Journal of Magnetism and Magnetic Materials.
Elsevier. https://doi.org/10.1016/j.jmmm.2017.12.073
chicago: Altmeyer, Sebastian. “Non-Linear Dynamics and Alternating ‘Flip’ Solutions
in Ferrofluidic Taylor-Couette Flow.” Journal of Magnetism and Magnetic Materials.
Elsevier, 2018. https://doi.org/10.1016/j.jmmm.2017.12.073.
ieee: S. Altmeyer, “Non-linear dynamics and alternating ‘flip’ solutions in ferrofluidic
Taylor-Couette flow,” Journal of Magnetism and Magnetic Materials, vol.
452. Elsevier, pp. 427–441, 2018.
ista: Altmeyer S. 2018. Non-linear dynamics and alternating ‘flip’ solutions in
ferrofluidic Taylor-Couette flow. Journal of Magnetism and Magnetic Materials.
452, 427–441.
mla: Altmeyer, Sebastian. “Non-Linear Dynamics and Alternating ‘Flip’ Solutions
in Ferrofluidic Taylor-Couette Flow.” Journal of Magnetism and Magnetic Materials,
vol. 452, Elsevier, 2018, pp. 427–41, doi:10.1016/j.jmmm.2017.12.073.
short: S. Altmeyer, Journal of Magnetism and Magnetic Materials 452 (2018) 427–441.
date_created: 2018-12-11T11:46:56Z
date_published: 2018-04-15T00:00:00Z
date_updated: 2023-09-13T09:03:44Z
day: '15'
ddc:
- '530'
department:
- _id: BjHo
doi: 10.1016/j.jmmm.2017.12.073
external_id:
isi:
- '000425547700061'
file:
- access_level: open_access
checksum: 431f5cd4a628d7ca21161f82b14ccb4f
content_type: application/pdf
creator: dernst
date_created: 2020-05-14T14:41:17Z
date_updated: 2020-07-14T12:46:37Z
file_id: '7838'
file_name: 2018_Magnetism_Altmeyer.pdf
file_size: 17309535
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file_date_updated: 2020-07-14T12:46:37Z
has_accepted_license: '1'
intvolume: ' 452'
isi: 1
language:
- iso: eng
month: '04'
oa: 1
oa_version: Submitted Version
page: 427 - 441
publication: Journal of Magnetism and Magnetic Materials
publication_status: published
publisher: Elsevier
publist_id: '7297'
quality_controlled: '1'
scopus_import: '1'
status: public
title: Non-linear dynamics and alternating ‘flip’ solutions in ferrofluidic Taylor-Couette
flow
type: journal_article
user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1
volume: 452
year: '2018'
...
---
_id: '52'
abstract:
- lang: eng
text: In this thesis we will discuss systems of point interacting fermions, their
stability and other spectral properties. Whereas for bosons a point interacting
system is always unstable this ques- tion is more subtle for a gas of two species
of fermions. In particular the answer depends on the mass ratio between these
two species. Most of this work will be focused on the N + M model which consists
of two species of fermions with N, M particles respectively which interact via
point interactions. We will introduce this model using a formal limit and discuss
the N + 1 system in more detail. In particular, we will show that for mass ratios
above a critical one, which does not depend on the particle number, the N + 1
system is stable. In the context of this model we will prove rigorous versions
of Tan relations which relate various quantities of the point-interacting model.
By restricting the N + 1 system to a box we define a finite density model with
point in- teractions. In the context of this system we will discuss the energy
change when introducing a point-interacting impurity into a system of non-interacting
fermions. We will see that this change in energy is bounded independently of the
particle number and in particular the bound only depends on the density and the
scattering length. As another special case of the N + M model we will show stability
of the 2 + 2 model for mass ratios in an interval around one. Further we will
investigate a different model of point interactions which was discussed before
in the literature and which is, contrary to the N + M model, not given by a limiting
procedure but is based on a Dirichlet form. We will show that this system behaves
trivially in the thermodynamic limit, i.e. the free energy per particle is the
same as the one of the non-interacting system.
alternative_title:
- ISTA Thesis
article_processing_charge: No
author:
- first_name: Thomas
full_name: Moser, Thomas
id: 2B5FC9A4-F248-11E8-B48F-1D18A9856A87
last_name: Moser
citation:
ama: Moser T. Point interactions in systems of fermions. 2018. doi:10.15479/AT:ISTA:th_1043
apa: Moser, T. (2018). Point interactions in systems of fermions. Institute
of Science and Technology Austria. https://doi.org/10.15479/AT:ISTA:th_1043
chicago: Moser, Thomas. “Point Interactions in Systems of Fermions.” Institute of
Science and Technology Austria, 2018. https://doi.org/10.15479/AT:ISTA:th_1043.
ieee: T. Moser, “Point interactions in systems of fermions,” Institute of Science
and Technology Austria, 2018.
ista: Moser T. 2018. Point interactions in systems of fermions. Institute of Science
and Technology Austria.
mla: Moser, Thomas. Point Interactions in Systems of Fermions. Institute
of Science and Technology Austria, 2018, doi:10.15479/AT:ISTA:th_1043.
short: T. Moser, Point Interactions in Systems of Fermions, Institute of Science
and Technology Austria, 2018.
date_created: 2018-12-11T11:44:22Z
date_published: 2018-09-04T00:00:00Z
date_updated: 2023-09-27T12:34:14Z
day: '04'
ddc:
- '515'
- '530'
- '519'
degree_awarded: PhD
department:
- _id: RoSe
doi: 10.15479/AT:ISTA:th_1043
file:
- access_level: open_access
checksum: fbd8c747d148b468a21213b7cf175225
content_type: application/pdf
creator: dernst
date_created: 2019-04-09T07:45:38Z
date_updated: 2020-07-14T12:46:37Z
file_id: '6256'
file_name: 2018_Thesis_Moser.pdf
file_size: 851164
relation: main_file
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checksum: c28e16ecfc1126d3ce324ec96493c01e
content_type: application/zip
creator: dernst
date_created: 2019-04-09T07:45:38Z
date_updated: 2020-07-14T12:46:37Z
file_id: '6257'
file_name: 2018_Thesis_Moser_Source.zip
file_size: 1531516
relation: source_file
file_date_updated: 2020-07-14T12:46:37Z
has_accepted_license: '1'
language:
- iso: eng
month: '09'
oa: 1
oa_version: Published Version
page: '115'
project:
- _id: 25C878CE-B435-11E9-9278-68D0E5697425
call_identifier: FWF
grant_number: P27533_N27
name: Structure of the Excitation Spectrum for Many-Body Quantum Systems
publication_identifier:
issn:
- 2663-337X
publication_status: published
publisher: Institute of Science and Technology Austria
publist_id: '8002'
pubrep_id: '1043'
related_material:
record:
- id: '5856'
relation: part_of_dissertation
status: public
- id: '154'
relation: part_of_dissertation
status: public
- id: '1198'
relation: part_of_dissertation
status: public
- id: '741'
relation: part_of_dissertation
status: public
status: public
supervisor:
- first_name: Robert
full_name: Seiringer, Robert
id: 4AFD0470-F248-11E8-B48F-1D18A9856A87
last_name: Seiringer
orcid: 0000-0002-6781-0521
title: Point interactions in systems of fermions
type: dissertation
user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1
year: '2018'
...
---
_id: '53'
abstract:
- lang: eng
text: In 2013, a publication repository was implemented at IST Austria and 2015
after a thorough preparation phase a data repository was implemented - both based
on the Open Source Software EPrints. In this text, designed as field report, we
will reflect on our experiences with Open Source Software in general and specifically
with EPrints regarding technical aspects but also regarding their characteristics
of the user community. The second part is a pleading for including the end users
in the process of implementation, adaption and evaluation.
author:
- first_name: Barbara
full_name: Petritsch, Barbara
id: 406048EC-F248-11E8-B48F-1D18A9856A87
last_name: Petritsch
orcid: 0000-0003-2724-4614
- first_name: Jana
full_name: Porsche, Jana
id: 3252EDC2-F248-11E8-B48F-1D18A9856A87
last_name: Porsche
citation:
ama: 'Petritsch B, Porsche J. IST PubRep and IST DataRep: the institutional repositories
at IST Austria. VÖB Mitteilungen. 2018;71(1):199-206. doi:10.31263/voebm.v71i1.1993'
apa: 'Petritsch, B., & Porsche, J. (2018). IST PubRep and IST DataRep: the institutional
repositories at IST Austria. VÖB Mitteilungen. Vereinigung Österreichischer
Bibliothekarinnen und Bibliothekare. https://doi.org/10.31263/voebm.v71i1.1993'
chicago: 'Petritsch, Barbara, and Jana Porsche. “IST PubRep and IST DataRep: The
Institutional Repositories at IST Austria.” VÖB Mitteilungen. Vereinigung
Österreichischer Bibliothekarinnen und Bibliothekare, 2018. https://doi.org/10.31263/voebm.v71i1.1993.'
ieee: 'B. Petritsch and J. Porsche, “IST PubRep and IST DataRep: the institutional
repositories at IST Austria,” VÖB Mitteilungen, vol. 71, no. 1. Vereinigung
Österreichischer Bibliothekarinnen und Bibliothekare, pp. 199–206, 2018.'
ista: 'Petritsch B, Porsche J. 2018. IST PubRep and IST DataRep: the institutional
repositories at IST Austria. VÖB Mitteilungen. 71(1), 199–206.'
mla: 'Petritsch, Barbara, and Jana Porsche. “IST PubRep and IST DataRep: The Institutional
Repositories at IST Austria.” VÖB Mitteilungen, vol. 71, no. 1, Vereinigung
Österreichischer Bibliothekarinnen und Bibliothekare, 2018, pp. 199–206, doi:10.31263/voebm.v71i1.1993.'
short: B. Petritsch, J. Porsche, VÖB Mitteilungen 71 (2018) 199–206.
date_created: 2018-12-11T11:44:22Z
date_published: 2018-10-01T00:00:00Z
date_updated: 2021-01-12T08:01:26Z
day: '01'
ddc:
- '020'
department:
- _id: E-Lib
doi: 10.31263/voebm.v71i1.1993
file:
- access_level: open_access
checksum: 7ac61bade5f37db011ca435ebcf86797
content_type: application/pdf
creator: dernst
date_created: 2018-12-17T12:40:27Z
date_updated: 2020-07-14T12:46:38Z
file_id: '5702'
file_name: 2018_VOEB_Petritsch.pdf
file_size: 509434
relation: main_file
file_date_updated: 2020-07-14T12:46:38Z
has_accepted_license: '1'
intvolume: ' 71'
issue: '1'
language:
- iso: eng
month: '10'
oa: 1
oa_version: Published Version
page: 199 - 206
publication: VÖB Mitteilungen
publication_status: published
publisher: Vereinigung Österreichischer Bibliothekarinnen und Bibliothekare
publist_id: '8001'
scopus_import: 1
status: public
title: 'IST PubRep and IST DataRep: the institutional repositories at IST Austria'
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 71
year: '2018'
...
---
_id: '530'
abstract:
- lang: eng
text: Inclusion–exclusion is an effective method for computing the volume of a union
of measurable sets. We extend it to multiple coverings, proving short inclusion–exclusion
formulas for the subset of Rn covered by at least k balls in a finite set. We
implement two of the formulas in dimension n=3 and report on results obtained
with our software.
article_processing_charge: No
author:
- first_name: Herbert
full_name: Edelsbrunner, Herbert
id: 3FB178DA-F248-11E8-B48F-1D18A9856A87
last_name: Edelsbrunner
orcid: 0000-0002-9823-6833
- first_name: Mabel
full_name: Iglesias Ham, Mabel
id: 41B58C0C-F248-11E8-B48F-1D18A9856A87
last_name: Iglesias Ham
citation:
ama: 'Edelsbrunner H, Iglesias Ham M. Multiple covers with balls I: Inclusion–exclusion.
Computational Geometry: Theory and Applications. 2018;68:119-133. doi:10.1016/j.comgeo.2017.06.014'
apa: 'Edelsbrunner, H., & Iglesias Ham, M. (2018). Multiple covers with balls
I: Inclusion–exclusion. Computational Geometry: Theory and Applications.
Elsevier. https://doi.org/10.1016/j.comgeo.2017.06.014'
chicago: 'Edelsbrunner, Herbert, and Mabel Iglesias Ham. “Multiple Covers with Balls
I: Inclusion–Exclusion.” Computational Geometry: Theory and Applications.
Elsevier, 2018. https://doi.org/10.1016/j.comgeo.2017.06.014.'
ieee: 'H. Edelsbrunner and M. Iglesias Ham, “Multiple covers with balls I: Inclusion–exclusion,”
Computational Geometry: Theory and Applications, vol. 68. Elsevier, pp.
119–133, 2018.'
ista: 'Edelsbrunner H, Iglesias Ham M. 2018. Multiple covers with balls I: Inclusion–exclusion.
Computational Geometry: Theory and Applications. 68, 119–133.'
mla: 'Edelsbrunner, Herbert, and Mabel Iglesias Ham. “Multiple Covers with Balls
I: Inclusion–Exclusion.” Computational Geometry: Theory and Applications,
vol. 68, Elsevier, 2018, pp. 119–33, doi:10.1016/j.comgeo.2017.06.014.'
short: 'H. Edelsbrunner, M. Iglesias Ham, Computational Geometry: Theory and Applications
68 (2018) 119–133.'
date_created: 2018-12-11T11:46:59Z
date_published: 2018-03-01T00:00:00Z
date_updated: 2023-09-13T08:59:00Z
day: '01'
ddc:
- '000'
department:
- _id: HeEd
doi: 10.1016/j.comgeo.2017.06.014
ec_funded: 1
external_id:
isi:
- '000415778300010'
file:
- access_level: open_access
checksum: 1c8d58cd489a66cd3e2064c1141c8c5e
content_type: application/pdf
creator: dernst
date_created: 2019-02-12T06:47:52Z
date_updated: 2020-07-14T12:46:38Z
file_id: '5953'
file_name: 2018_Edelsbrunner.pdf
file_size: 708357
relation: main_file
file_date_updated: 2020-07-14T12:46:38Z
has_accepted_license: '1'
intvolume: ' 68'
isi: 1
language:
- iso: eng
month: '03'
oa: 1
oa_version: Preprint
page: 119 - 133
project:
- _id: 255D761E-B435-11E9-9278-68D0E5697425
call_identifier: FP7
grant_number: '318493'
name: Topological Complex Systems
publication: 'Computational Geometry: Theory and Applications'
publication_status: published
publisher: Elsevier
publist_id: '7289'
quality_controlled: '1'
scopus_import: '1'
status: public
title: 'Multiple covers with balls I: Inclusion–exclusion'
type: journal_article
user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1
volume: 68
year: '2018'
...
---
_id: '536'
abstract:
- lang: eng
text: 'We consider the problem of consensus in the challenging classic model. In
this model, the adversary is adaptive; it can choose which processors crash at
any point during the course of the algorithm. Further, communication is via asynchronous
message passing: there is no known upper bound on the time to send a message from
one processor to another, and all messages and coin flips are seen by the adversary.
We describe a new randomized consensus protocol with expected message complexity
O(n2log2n) when fewer than n / 2 processes may fail by crashing. This is an almost-linear
improvement over the best previously known protocol, and within logarithmic factors
of a known Ω(n2) message lower bound. The protocol further ensures that no process
sends more than O(nlog3n) messages in expectation, which is again within logarithmic
factors of optimal. We also present a generalization of the algorithm to an arbitrary
number of failures t, which uses expected O(nt+t2log2t) total messages. Our approach
is to build a message-efficient, resilient mechanism for aggregating individual
processor votes, implementing the message-passing equivalent of a weak shared
coin. Roughly, in our protocol, a processor first announces its votes to small
groups, then propagates them to increasingly larger groups as it generates more
and more votes. To bound the number of messages that an individual process might
have to send or receive, the protocol progressively increases the weight of generated
votes. The main technical challenge is bounding the impact of votes that are still
“in flight” (generated, but not fully propagated) on the final outcome of the
shared coin, especially since such votes might have different weights. We achieve
this by leveraging the structure of the algorithm, and a technical argument based
on martingale concentration bounds. Overall, we show that it is possible to build
an efficient message-passing implementation of a shared coin, and in the process
(almost-optimally) solve the classic consensus problem in the asynchronous message-passing
model.'
article_processing_charge: Yes (via OA deal)
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: James
full_name: Aspnes, James
last_name: Aspnes
- first_name: Valerie
full_name: King, Valerie
last_name: King
- first_name: Jared
full_name: Saia, Jared
last_name: Saia
citation:
ama: Alistarh D-A, Aspnes J, King V, Saia J. Communication-efficient randomized
consensus. Distributed Computing. 2018;31(6):489-501. doi:10.1007/s00446-017-0315-1
apa: Alistarh, D.-A., Aspnes, J., King, V., & Saia, J. (2018). Communication-efficient
randomized consensus. Distributed Computing. Springer. https://doi.org/10.1007/s00446-017-0315-1
chicago: Alistarh, Dan-Adrian, James Aspnes, Valerie King, and Jared Saia. “Communication-Efficient
Randomized Consensus.” Distributed Computing. Springer, 2018. https://doi.org/10.1007/s00446-017-0315-1.
ieee: D.-A. Alistarh, J. Aspnes, V. King, and J. Saia, “Communication-efficient
randomized consensus,” Distributed Computing, vol. 31, no. 6. Springer,
pp. 489–501, 2018.
ista: Alistarh D-A, Aspnes J, King V, Saia J. 2018. Communication-efficient randomized
consensus. Distributed Computing. 31(6), 489–501.
mla: Alistarh, Dan-Adrian, et al. “Communication-Efficient Randomized Consensus.”
Distributed Computing, vol. 31, no. 6, Springer, 2018, pp. 489–501, doi:10.1007/s00446-017-0315-1.
short: D.-A. Alistarh, J. Aspnes, V. King, J. Saia, Distributed Computing 31 (2018)
489–501.
date_created: 2018-12-11T11:47:01Z
date_published: 2018-11-01T00:00:00Z
date_updated: 2023-02-23T12:23:25Z
day: '01'
ddc:
- '000'
department:
- _id: DaAl
doi: 10.1007/s00446-017-0315-1
file:
- access_level: open_access
checksum: 69b46e537acdcac745237ddb853fcbb5
content_type: application/pdf
creator: dernst
date_created: 2019-01-22T07:25:51Z
date_updated: 2020-07-14T12:46:38Z
file_id: '5867'
file_name: 2017_DistribComp_Alistarh.pdf
file_size: 595707
relation: main_file
file_date_updated: 2020-07-14T12:46:38Z
has_accepted_license: '1'
intvolume: ' 31'
issue: '6'
language:
- iso: eng
month: '11'
oa: 1
oa_version: Published Version
page: 489-501
project:
- _id: B67AFEDC-15C9-11EA-A837-991A96BB2854
name: IST Austria Open Access Fund
publication: Distributed Computing
publication_identifier:
issn:
- '01782770'
publication_status: published
publisher: Springer
publist_id: '7281'
quality_controlled: '1'
scopus_import: 1
status: public
title: Communication-efficient randomized consensus
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: journal_article
user_id: 3E5EF7F0-F248-11E8-B48F-1D18A9856A87
volume: 31
year: '2018'
...
---
_id: '12193'
abstract:
- lang: eng
text: DNA methylation regulates eukaryotic gene expression and is extensively reprogrammed
during animal development. However, whether developmental methylation reprogramming
during the sporophytic life cycle of flowering plants regulates genes is presently
unknown. Here we report a distinctive gene-targeted RNA-directed DNA methylation
(RdDM) activity in the Arabidopsis thaliana male sexual lineage that regulates
gene expression in meiocytes. Loss of sexual-lineage-specific RdDM causes mis-splicing
of the MPS1 gene (also known as PRD2), thereby disrupting meiosis. Our results
establish a regulatory paradigm in which de novo methylation creates a cell-lineage-specific
epigenetic signature that controls gene expression and contributes to cellular
function in flowering plants.
acknowledgement: We thank Daniel Zilberman for intellectual contributions to this
work and assistance with manuscript preparation. We also thank Caroline Dean, Kirsten
Bomblies, Vinod Kumar, Siobhan Brady and Sophien Kamoun for comments on the manuscript,
Hugh Dickinson and Josephine Hellberg for developing the meiocyte isolation method,
Giles Oldroyd for the pGWB13-Bar vector, Elisa Fiume for the pMDC107-NTF vector,
Matthew Hartley, Matthew Couchman and Tjelvar Sten Gunnar Olsson for bioinformatics
support, and the John Innes Centre Bioimaging Facility (Elaine Barclay and Grant
Calder) for their assistance with microscopy. This work was funded by a Biotechnology
and Biological Sciences Research Council (BBSRC) David Phillips Fellowship (BBL0250431)
to X.F., a BBSRC grant (BBM01973X1) to J.H., and a Sainsbury PhD Studentship to
J.W.
article_processing_charge: No
article_type: original
author:
- first_name: James
full_name: Walker, James
last_name: Walker
- first_name: Hongbo
full_name: Gao, Hongbo
last_name: Gao
- first_name: Jingyi
full_name: Zhang, Jingyi
last_name: Zhang
- first_name: Billy
full_name: Aldridge, Billy
last_name: Aldridge
- first_name: Martin
full_name: Vickers, Martin
last_name: Vickers
- first_name: James D.
full_name: Higgins, James D.
last_name: Higgins
- first_name: Xiaoqi
full_name: Feng, Xiaoqi
id: e0164712-22ee-11ed-b12a-d80fcdf35958
last_name: Feng
orcid: 0000-0002-4008-1234
citation:
ama: Walker J, Gao H, Zhang J, et al. Sexual-lineage-specific DNA methylation regulates
meiosis in Arabidopsis. Nature Genetics. 2017;50(1):130-137. doi:10.1038/s41588-017-0008-5
apa: Walker, J., Gao, H., Zhang, J., Aldridge, B., Vickers, M., Higgins, J. D.,
& Feng, X. (2017). Sexual-lineage-specific DNA methylation regulates meiosis
in Arabidopsis. Nature Genetics. Nature Research. https://doi.org/10.1038/s41588-017-0008-5
chicago: Walker, James, Hongbo Gao, Jingyi Zhang, Billy Aldridge, Martin Vickers,
James D. Higgins, and Xiaoqi Feng. “Sexual-Lineage-Specific DNA Methylation Regulates
Meiosis in Arabidopsis.” Nature Genetics. Nature Research, 2017. https://doi.org/10.1038/s41588-017-0008-5.
ieee: J. Walker et al., “Sexual-lineage-specific DNA methylation regulates
meiosis in Arabidopsis,” Nature Genetics, vol. 50, no. 1. Nature Research,
pp. 130–137, 2017.
ista: Walker J, Gao H, Zhang J, Aldridge B, Vickers M, Higgins JD, Feng X. 2017.
Sexual-lineage-specific DNA methylation regulates meiosis in Arabidopsis. Nature
Genetics. 50(1), 130–137.
mla: Walker, James, et al. “Sexual-Lineage-Specific DNA Methylation Regulates Meiosis
in Arabidopsis.” Nature Genetics, vol. 50, no. 1, Nature Research, 2017,
pp. 130–37, doi:10.1038/s41588-017-0008-5.
short: J. Walker, H. Gao, J. Zhang, B. Aldridge, M. Vickers, J.D. Higgins, X. Feng,
Nature Genetics 50 (2017) 130–137.
date_created: 2023-01-16T09:18:05Z
date_published: 2017-12-18T00:00:00Z
date_updated: 2023-10-18T07:21:53Z
day: '18'
department:
- _id: XiFe
doi: 10.1038/s41588-017-0008-5
external_id:
pmid:
- '29255257'
intvolume: ' 50'
issue: '1'
keyword:
- Genetics
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7611288/
month: '12'
oa: 1
oa_version: None
page: 130-137
pmid: 1
publication: Nature Genetics
publication_identifier:
eissn:
- 1546-1718
issn:
- 1061-4036
publication_status: published
publisher: Nature Research
quality_controlled: '1'
scopus_import: '1'
status: public
title: Sexual-lineage-specific DNA methylation regulates meiosis in Arabidopsis
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 50
year: '2017'
...
---
_id: '1228'
abstract:
- lang: eng
text: Since 2006, reprogrammed cells have increasingly been used as a biomedical
research technique in addition to neuro-psychiatric methods. These rapidly evolving
techniques allow for the generation of neuronal sub-populations, and have sparked
interest not only in monogenetic neuro-psychiatric diseases, but also in poly-genetic
and poly-aetiological disorders such as schizophrenia (SCZ) and bipolar disorder
(BPD). This review provides a summary of 19 publications on reprogrammed adult
somatic cells derived from patients with SCZ, and five publications using this
technique in patients with BPD. As both disorders are complex and heterogeneous,
there is a plurality of hypotheses to be tested in vitro. In SCZ, data on alterations
of dopaminergic transmission in vitro are sparse, despite the great explanatory
power of the so-called DA hypothesis of SCZ. Some findings correspond to perturbations
of cell energy metabolism, and observations in reprogrammed cells suggest neuro-developmental
alterations. Some studies also report on the efficacy of medicinal compounds to
revert alterations observed in cellular models. However, due to the paucity of
replication studies, no comprehensive conclusions can be drawn from studies using
reprogrammed cells at the present time. In the future, findings from cell culture
methods need to be integrated with clinical, epidemiological, pharmacological
and imaging data in order to generate a more comprehensive picture of SCZ and
BPD.
acknowledgement: This work was supported by grants of the Austrian Science Fund (FWF)
P23585B09 to M.W. and F3506 to H.H.S. and the “Wiener Wissenschafts-, Forschungs-
und Technologiefonds” (Vienna Science and Technology Fund; WWTF) CS15-033 to M.W.
article_processing_charge: No
article_type: review
author:
- first_name: Ulrich
full_name: Sauerzopf, Ulrich
last_name: Sauerzopf
- first_name: Roberto
full_name: Sacco, Roberto
id: 42C9F57E-F248-11E8-B48F-1D18A9856A87
last_name: Sacco
- first_name: Gaia
full_name: Novarino, Gaia
id: 3E57A680-F248-11E8-B48F-1D18A9856A87
last_name: Novarino
orcid: 0000-0002-7673-7178
- first_name: Marco
full_name: Niello, Marco
last_name: Niello
- first_name: Ana
full_name: Weidenauer, Ana
last_name: Weidenauer
- first_name: Nicole
full_name: Praschak Rieder, Nicole
last_name: Praschak Rieder
- first_name: Harald
full_name: Sitte, Harald
last_name: Sitte
- first_name: Matthaeus
full_name: Willeit, Matthaeus
last_name: Willeit
citation:
ama: Sauerzopf U, Sacco R, Novarino G, et al. Are reprogrammed cells a useful tool
for studying dopamine dysfunction in psychotic disorders? A review of the current
evidence. European Journal of Neuroscience. 2017;45(1):45-57. doi:10.1111/ejn.13418
apa: Sauerzopf, U., Sacco, R., Novarino, G., Niello, M., Weidenauer, A., Praschak
Rieder, N., … Willeit, M. (2017). Are reprogrammed cells a useful tool for studying
dopamine dysfunction in psychotic disorders? A review of the current evidence.
European Journal of Neuroscience. Wiley-Blackwell. https://doi.org/10.1111/ejn.13418
chicago: Sauerzopf, Ulrich, Roberto Sacco, Gaia Novarino, Marco Niello, Ana Weidenauer,
Nicole Praschak Rieder, Harald Sitte, and Matthaeus Willeit. “Are Reprogrammed
Cells a Useful Tool for Studying Dopamine Dysfunction in Psychotic Disorders?
A Review of the Current Evidence.” European Journal of Neuroscience. Wiley-Blackwell,
2017. https://doi.org/10.1111/ejn.13418.
ieee: U. Sauerzopf et al., “Are reprogrammed cells a useful tool for studying
dopamine dysfunction in psychotic disorders? A review of the current evidence,”
European Journal of Neuroscience, vol. 45, no. 1. Wiley-Blackwell, pp.
45–57, 2017.
ista: Sauerzopf U, Sacco R, Novarino G, Niello M, Weidenauer A, Praschak Rieder
N, Sitte H, Willeit M. 2017. Are reprogrammed cells a useful tool for studying
dopamine dysfunction in psychotic disorders? A review of the current evidence.
European Journal of Neuroscience. 45(1), 45–57.
mla: Sauerzopf, Ulrich, et al. “Are Reprogrammed Cells a Useful Tool for Studying
Dopamine Dysfunction in Psychotic Disorders? A Review of the Current Evidence.”
European Journal of Neuroscience, vol. 45, no. 1, Wiley-Blackwell, 2017,
pp. 45–57, doi:10.1111/ejn.13418.
short: U. Sauerzopf, R. Sacco, G. Novarino, M. Niello, A. Weidenauer, N. Praschak
Rieder, H. Sitte, M. Willeit, European Journal of Neuroscience 45 (2017) 45–57.
date_created: 2018-12-11T11:50:50Z
date_published: 2017-01-01T00:00:00Z
date_updated: 2023-09-20T11:16:01Z
day: '01'
ddc:
- '616'
department:
- _id: GaNo
doi: 10.1111/ejn.13418
external_id:
isi:
- '000392487100005'
pmid:
- '27690184'
file:
- access_level: open_access
checksum: c572cf02be8fbb7020cfcfb892182e4c
content_type: application/pdf
creator: system
date_created: 2018-12-12T10:10:48Z
date_updated: 2020-07-14T12:44:39Z
file_id: '4838'
file_name: IST-2017-738-v1+1_Sauerzopf_et_al-2017-European_Journal_of_Neuroscience.pdf
file_size: 169145
relation: main_file
file_date_updated: 2020-07-14T12:44:39Z
has_accepted_license: '1'
intvolume: ' 45'
isi: 1
issue: '1'
language:
- iso: eng
month: '01'
oa: 1
oa_version: Published Version
page: 45 - 57
pmid: 1
publication: European Journal of Neuroscience
publication_status: published
publisher: Wiley-Blackwell
publist_id: '6106'
pubrep_id: '738'
quality_controlled: '1'
scopus_import: '1'
status: public
title: Are reprogrammed cells a useful tool for studying dopamine dysfunction in psychotic
disorders? A review of the current evidence
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: journal_article
user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1
volume: 45
year: '2017'
...
---
_id: '123'
abstract:
- lang: eng
text: The Leidenfrost effect occurs when an object near a hot surface vaporizes
rapidly enough to lift itself up and hover. Although well understood for liquids
and stiff sublimable solids, nothing is known about the effect with materials
whose stiffness lies between these extremes. Here we introduce a new phenomenon
that occurs with vaporizable soft solids - the elastic Leidenfrost effect. By
dropping hydrogel spheres onto hot surfaces we find that, rather than hovering,
they energetically bounce several times their diameter for minutes at a time.
With high-speed video during a single impact, we uncover high-frequency microscopic
gap dynamics at the sphere/substrate interface. We show how these otherwise-hidden
agitations constitute work cycles that harvest mechanical energy from the vapour
and sustain the bouncing. Our findings suggest a new strategy for injecting mechanical
energy into a widely used class of soft materials, with potential relevance to
fields such as active matter, soft robotics and microfluidics.
acknowledgement: A.S. acknowledges funding from the Delta Institute for Theoretical
Physics and the hospitality of the IBS Center for Theoretical Physics of Complex
Systems, Daejeon, South Korea. We acknowledge funding from the Netherlands Organisation
for Scientific Research through grants VICI No. NWO-680-47-609 (M.v.H. and S.R.W.),
VENI No. NWO-680-47-445 (C.C.) and VENI No. NWO-680-47-453 (S.R.W.).
arxiv: 1
author:
- first_name: Scott R
full_name: Waitukaitis, Scott R
id: 3A1FFC16-F248-11E8-B48F-1D18A9856A87
last_name: Waitukaitis
orcid: 0000-0002-2299-3176
- first_name: Antal
full_name: Zuiderwijk, Antal
last_name: Zuiderwijk
- first_name: Anton
full_name: Souslov, Anton
last_name: Souslov
- first_name: Corentin
full_name: Coulais, Corentin
last_name: Coulais
- first_name: Martin
full_name: Van Hecke, Martin
last_name: Van Hecke
citation:
ama: Waitukaitis SR, Zuiderwijk A, Souslov A, Coulais C, Van Hecke M. Coupling the
Leidenfrost effect and elastic deformations to power sustained bouncing. Nature
Physics. 2017;13(11):1095-1099. doi:10.1038/nphys4194
apa: Waitukaitis, S. R., Zuiderwijk, A., Souslov, A., Coulais, C., & Van Hecke,
M. (2017). Coupling the Leidenfrost effect and elastic deformations to power sustained
bouncing. Nature Physics. Nature Publishing Group. https://doi.org/10.1038/nphys4194
chicago: Waitukaitis, Scott R, Antal Zuiderwijk, Anton Souslov, Corentin Coulais,
and Martin Van Hecke. “Coupling the Leidenfrost Effect and Elastic Deformations
to Power Sustained Bouncing.” Nature Physics. Nature Publishing Group,
2017. https://doi.org/10.1038/nphys4194.
ieee: S. R. Waitukaitis, A. Zuiderwijk, A. Souslov, C. Coulais, and M. Van Hecke,
“Coupling the Leidenfrost effect and elastic deformations to power sustained bouncing,”
Nature Physics, vol. 13, no. 11. Nature Publishing Group, pp. 1095–1099,
2017.
ista: Waitukaitis SR, Zuiderwijk A, Souslov A, Coulais C, Van Hecke M. 2017. Coupling
the Leidenfrost effect and elastic deformations to power sustained bouncing. Nature
Physics. 13(11), 1095–1099.
mla: Waitukaitis, Scott R., et al. “Coupling the Leidenfrost Effect and Elastic
Deformations to Power Sustained Bouncing.” Nature Physics, vol. 13, no.
11, Nature Publishing Group, 2017, pp. 1095–99, doi:10.1038/nphys4194.
short: S.R. Waitukaitis, A. Zuiderwijk, A. Souslov, C. Coulais, M. Van Hecke, Nature
Physics 13 (2017) 1095–1099.
date_created: 2018-12-11T11:44:45Z
date_published: 2017-07-24T00:00:00Z
date_updated: 2021-01-12T06:49:14Z
day: '24'
doi: 10.1038/nphys4194
extern: '1'
external_id:
arxiv:
- '1705.03530'
intvolume: ' 13'
issue: '11'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/abs/1705.03530
month: '07'
oa: 1
oa_version: Preprint
page: 1095 - 1099
publication: Nature Physics
publication_status: published
publisher: Nature Publishing Group
publist_id: '7931'
quality_controlled: '1'
status: public
title: Coupling the Leidenfrost effect and elastic deformations to power sustained
bouncing
type: journal_article
user_id: 3E5EF7F0-F248-11E8-B48F-1D18A9856A87
volume: 13
year: '2017'
...
---
_id: '12571'
abstract:
- lang: eng
text: We consider the problems of maintaining approximate maximum matching and minimum
vertex cover in a dynamic graph. Starting with the seminal work of Onak and Rubinfeld
[STOC 2010], this problem has received significant attention in recent years.
Very recently, extending the framework of Baswana, Gupta and Sen [FOCS 2011],
Solomon [FOCS 2016] gave a randomized 2-approximation dynamic algorithm for this
problem that has amortized update time of O(1) with high probability. We consider
the natural open question of derandomizing this result. We present a new deterministic
fully dynamic algorithm that maintains a O(1)-approximate minimum vertex cover
and maximum fractional matching, with an amortized update time of O(1). Previously,
the best deterministic algorithm for this problem was due to Bhattacharya, Henzinger
and Italiano [SODA 2015]; it had an approximation ratio of (2+ϵ) and an amortized
update time of O(logn/ϵ2). Our result can be generalized to give a fully dynamic
O(f3)-approximation algorithm with O(f2) amortized update time for the hypergraph
vertex cover and fractional matching problems, where every hyperedge has at most
f vertices.
alternative_title:
- LNCS
article_processing_charge: No
arxiv: 1
author:
- first_name: Sayan
full_name: Bhattacharya, Sayan
last_name: Bhattacharya
- first_name: Deeparnab
full_name: Chakrabarty, Deeparnab
last_name: Chakrabarty
- 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: 'Bhattacharya S, Chakrabarty D, Henzinger MH. Deterministic fully dynamic approximate
vertex cover and fractional matching in O(1) amortized update time. In: 19th
International Conference on Integer Programming and Combinatorial Optimization.
Vol 10328. Springer Nature; 2017:86-98. doi:10.1007/978-3-319-59250-3_8'
apa: 'Bhattacharya, S., Chakrabarty, D., & Henzinger, M. H. (2017). Deterministic
fully dynamic approximate vertex cover and fractional matching in O(1) amortized
update time. In 19th International Conference on Integer Programming and Combinatorial
Optimization (Vol. 10328, pp. 86–98). Waterloo, ON, Canada: Springer Nature.
https://doi.org/10.1007/978-3-319-59250-3_8'
chicago: Bhattacharya, Sayan, Deeparnab Chakrabarty, and Monika H Henzinger. “Deterministic
Fully Dynamic Approximate Vertex Cover and Fractional Matching in O(1) Amortized
Update Time.” In 19th International Conference on Integer Programming and Combinatorial
Optimization, 10328:86–98. Springer Nature, 2017. https://doi.org/10.1007/978-3-319-59250-3_8.
ieee: S. Bhattacharya, D. Chakrabarty, and M. H. Henzinger, “Deterministic fully
dynamic approximate vertex cover and fractional matching in O(1) amortized update
time,” in 19th International Conference on Integer Programming and Combinatorial
Optimization, Waterloo, ON, Canada, 2017, vol. 10328, pp. 86–98.
ista: 'Bhattacharya S, Chakrabarty D, Henzinger MH. 2017. Deterministic fully dynamic
approximate vertex cover and fractional matching in O(1) amortized update time.
19th International Conference on Integer Programming and Combinatorial Optimization.
IPCO: Integer Programming and Combinatorial Optimization, LNCS, vol. 10328, 86–98.'
mla: Bhattacharya, Sayan, et al. “Deterministic Fully Dynamic Approximate Vertex
Cover and Fractional Matching in O(1) Amortized Update Time.” 19th International
Conference on Integer Programming and Combinatorial Optimization, vol. 10328,
Springer Nature, 2017, pp. 86–98, doi:10.1007/978-3-319-59250-3_8.
short: S. Bhattacharya, D. Chakrabarty, M.H. Henzinger, in:, 19th International
Conference on Integer Programming and Combinatorial Optimization, Springer Nature,
2017, pp. 86–98.
conference:
end_date: 2017-06-28
location: Waterloo, ON, Canada
name: 'IPCO: Integer Programming and Combinatorial Optimization'
start_date: 2017-06-26
date_created: 2023-02-20T07:52:31Z
date_published: 2017-05-24T00:00:00Z
date_updated: 2023-02-20T07:57:24Z
day: '24'
doi: 10.1007/978-3-319-59250-3_8
extern: '1'
external_id:
arxiv:
- '1611.00198'
intvolume: ' 10328'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/abs/1611.00198
month: '05'
oa: 1
oa_version: Preprint
page: 86-98
publication: 19th International Conference on Integer Programming and Combinatorial
Optimization
publication_identifier:
eisbn:
- '9783319592503'
isbn:
- '9783319592497'
issn:
- 0302-9743
- 1611-3349
publication_status: published
publisher: Springer Nature
quality_controlled: '1'
scopus_import: '1'
status: public
title: Deterministic fully dynamic approximate vertex cover and fractional matching
in O(1) amortized update time
type: conference
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 10328
year: '2017'
...
---
_id: '12608'
abstract:
- lang: eng
text: The spatio-temporal distribution of air temperature over mountain glaciers
can demonstrate complex patterns, yet it is often represented simplistically using
linear vertical temperature gradients (VTGs) extrapolated from off-glacier locations.
We analyse a network of centreline and lateral air temperature observations at
Tsanteleina Glacier, Italy, during summer 2015. On average, VTGs are steep (<−0.0065
°C m−1), but they are shallow under warm ambient conditions
when the correlation between air temperature and elevation becomes weaker. Published
along-flowline temperature distribution methods explain centreline observations
well, including warming on the lower glacier tongue, but cannot estimate lateral
temperature variability. Application of temperature distribution methods improves
simulation of melt rates (RMSE) in an energy-balance model by up to 36% compared
to the environmental lapse rate extrapolated from an off-glacier station. However,
results suggest that model parameters are not easily transferable to glaciers
with a small fetch without recalibration. Such methods have potential to improve
estimates of temperature across a glacier, but their parameter transferability
should be further linked to the glacier and atmospheric characteristics. Furthermore,
‘cold spots’, which can be >2°C cooler than expected for their elevation, whose
occurrence is not predicted by the temperature distribution models, are identified
at one-quarter of the measurement sites.
article_processing_charge: No
article_type: original
author:
- first_name: THOMAS E.
full_name: SHAW, THOMAS E.
last_name: SHAW
- first_name: BEN W.
full_name: BROCK, BEN W.
last_name: BROCK
- first_name: ÁLVARO
full_name: AYALA, ÁLVARO
last_name: AYALA
- first_name: NICK
full_name: RUTTER, NICK
last_name: RUTTER
- first_name: Francesca
full_name: Pellicciotti, Francesca
id: b28f055a-81ea-11ed-b70c-a9fe7f7b0e70
last_name: Pellicciotti
citation:
ama: 'SHAW TE, BROCK BW, AYALA Á, RUTTER N, Pellicciotti F. Centreline and cross-glacier
air temperature variability on an Alpine glacier: Assessing temperature distribution
methods and their influence on melt model calculations. Journal of Glaciology.
2017;63(242):973-988. doi:10.1017/jog.2017.65'
apa: 'SHAW, T. E., BROCK, B. W., AYALA, Á., RUTTER, N., & Pellicciotti, F. (2017).
Centreline and cross-glacier air temperature variability on an Alpine glacier:
Assessing temperature distribution methods and their influence on melt model calculations.
Journal of Glaciology. Cambridge University Press. https://doi.org/10.1017/jog.2017.65'
chicago: 'SHAW, THOMAS E., BEN W. BROCK, ÁLVARO AYALA, NICK RUTTER, and Francesca
Pellicciotti. “Centreline and Cross-Glacier Air Temperature Variability on an
Alpine Glacier: Assessing Temperature Distribution Methods and Their Influence
on Melt Model Calculations.” Journal of Glaciology. Cambridge University
Press, 2017. https://doi.org/10.1017/jog.2017.65.'
ieee: 'T. E. SHAW, B. W. BROCK, Á. AYALA, N. RUTTER, and F. Pellicciotti, “Centreline
and cross-glacier air temperature variability on an Alpine glacier: Assessing
temperature distribution methods and their influence on melt model calculations,”
Journal of Glaciology, vol. 63, no. 242. Cambridge University Press, pp.
973–988, 2017.'
ista: 'SHAW TE, BROCK BW, AYALA Á, RUTTER N, Pellicciotti F. 2017. Centreline and
cross-glacier air temperature variability on an Alpine glacier: Assessing temperature
distribution methods and their influence on melt model calculations. Journal of
Glaciology. 63(242), 973–988.'
mla: 'SHAW, THOMAS E., et al. “Centreline and Cross-Glacier Air Temperature Variability
on an Alpine Glacier: Assessing Temperature Distribution Methods and Their Influence
on Melt Model Calculations.” Journal of Glaciology, vol. 63, no. 242, Cambridge
University Press, 2017, pp. 973–88, doi:10.1017/jog.2017.65.'
short: T.E. SHAW, B.W. BROCK, Á. AYALA, N. RUTTER, F. Pellicciotti, Journal of Glaciology
63 (2017) 973–988.
date_created: 2023-02-20T08:13:47Z
date_published: 2017-12-01T00:00:00Z
date_updated: 2023-02-28T11:30:34Z
day: '01'
doi: 10.1017/jog.2017.65
extern: '1'
intvolume: ' 63'
issue: '242'
keyword:
- Earth-Surface Processes
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1017/jog.2017.65
month: '12'
oa: 1
oa_version: Published Version
page: 973-988
publication: Journal of Glaciology
publication_identifier:
eissn:
- 1727-5652
issn:
- 0022-1430
publication_status: published
publisher: Cambridge University Press
quality_controlled: '1'
scopus_import: '1'
status: public
title: 'Centreline and cross-glacier air temperature variability on an Alpine glacier:
Assessing temperature distribution methods and their influence on melt model calculations'
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 63
year: '2017'
...
---
_id: '12609'
abstract:
- lang: eng
text: Previous estimates of melt and surface sublimation on glaciers of the subtropical
semiarid Andes (29–34°S) have been obtained at few specific locations, but it
is not clear how ablation components vary across the entire extent of a glacier
in this dry environment. Here, we simulate the distributed energy and mass balance
of Juncal Norte Glacier (33°S) during a 2-month summer period. Forcing fields
of near-surface air temperature and wind speed are generated using two methods
accounting for the main physical processes that shape their spatial variations.
Simulated meteorological variables and ablation agree well with observations on
the glacier tongue and reveal complex patterns of energy and mass fluxes. Ablation
decreases from 70 mm w.e. d−1 at the low-albedo glacier terminus
(~3000 m), where almost 100% of total ablation corresponds to melt, to <5 mm
w.e. d−1 at wind-exposed, strong-radiated sites above 5500
m, where surface sublimation represents >75% of total ablation. Our simulations
provide the first glacier-scale estimates of ablation components on a glacier
in the study region and better reproduce the observed and expected spatial variations
of melt and surface sublimation, in comparison with more simple assumptions, such
as linear gradients and uniform wind speeds.
article_processing_charge: No
article_type: original
author:
- first_name: A.
full_name: AYALA, A.
last_name: AYALA
- first_name: Francesca
full_name: Pellicciotti, Francesca
id: b28f055a-81ea-11ed-b70c-a9fe7f7b0e70
last_name: Pellicciotti
- first_name: N.
full_name: PELEG, N.
last_name: PELEG
- first_name: P.
full_name: BURLANDO, P.
last_name: BURLANDO
citation:
ama: 'AYALA A, Pellicciotti F, PELEG N, BURLANDO P. Melt and surface sublimation
across a glacier in a dry environment: distributed energy-balance modelling of
Juncal Norte Glacier, Chile. Journal of Glaciology. 2017;63(241):803-822.
doi:10.1017/jog.2017.46'
apa: 'AYALA, A., Pellicciotti, F., PELEG, N., & BURLANDO, P. (2017). Melt and
surface sublimation across a glacier in a dry environment: distributed energy-balance
modelling of Juncal Norte Glacier, Chile. Journal of Glaciology. Cambridge
University Press. https://doi.org/10.1017/jog.2017.46'
chicago: 'AYALA, A., Francesca Pellicciotti, N. PELEG, and P. BURLANDO. “Melt and
Surface Sublimation across a Glacier in a Dry Environment: Distributed Energy-Balance
Modelling of Juncal Norte Glacier, Chile.” Journal of Glaciology. Cambridge
University Press, 2017. https://doi.org/10.1017/jog.2017.46.'
ieee: 'A. AYALA, F. Pellicciotti, N. PELEG, and P. BURLANDO, “Melt and surface sublimation
across a glacier in a dry environment: distributed energy-balance modelling of
Juncal Norte Glacier, Chile,” Journal of Glaciology, vol. 63, no. 241.
Cambridge University Press, pp. 803–822, 2017.'
ista: 'AYALA A, Pellicciotti F, PELEG N, BURLANDO P. 2017. Melt and surface sublimation
across a glacier in a dry environment: distributed energy-balance modelling of
Juncal Norte Glacier, Chile. Journal of Glaciology. 63(241), 803–822.'
mla: 'AYALA, A., et al. “Melt and Surface Sublimation across a Glacier in a Dry
Environment: Distributed Energy-Balance Modelling of Juncal Norte Glacier, Chile.”
Journal of Glaciology, vol. 63, no. 241, Cambridge University Press, 2017,
pp. 803–22, doi:10.1017/jog.2017.46.'
short: A. AYALA, F. Pellicciotti, N. PELEG, P. BURLANDO, Journal of Glaciology 63
(2017) 803–822.
date_created: 2023-02-20T08:13:53Z
date_published: 2017-10-01T00:00:00Z
date_updated: 2023-02-28T11:28:19Z
day: '01'
doi: 10.1017/jog.2017.46
extern: '1'
intvolume: ' 63'
issue: '241'
keyword:
- Earth-Surface Processes
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1017/jog.2017.46
month: '10'
oa: 1
oa_version: Published Version
page: 803-822
publication: Journal of Glaciology
publication_identifier:
eissn:
- 1727-5652
issn:
- 0022-1430
publication_status: published
publisher: Cambridge University Press
quality_controlled: '1'
scopus_import: '1'
status: public
title: 'Melt and surface sublimation across a glacier in a dry environment: distributed
energy-balance modelling of Juncal Norte Glacier, Chile'
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 63
year: '2017'
...
---
_id: '12610'
abstract:
- lang: eng
text: The hydrological systems of heavily-downwasted debris-covered glaciers differ
from those of clean-ice glaciers due to the hummocky surface and debris mantle
of such glaciers, leading to a relatively limited understanding of drainage pathways.
Supraglacial ponds represent sinks within the discontinuous supraglacial drainage
system, and occasionally drain englacially. To assess pond dynamics, we made pond
water level measurements on Lirung Glacier, Nepal, during May and October of 2013
and 2014. Simultaneously, aerial, satellite, and terrestrial orthoimages and digital
elevation models were obtained, providing snapshots of the ponds and their surroundings.
We performed a DEM-based analysis of the glacier's closed surface catchments to
identify surface drainage pathways and englacial drainage points, and compared
this to field observations of surface and near-surface water flow. The total ponded
area was higher in the pre-monsoon than post-monsoon, with individual ponds filling
and draining seasonally associated with the surface exposure of englacial conduit
segments. We recorded four pond drainage events, all of which occurred gradually
(duration of weeks), observed diurnal fluctuations indicative of varying water
supply and outflow discharge, and we documented instances of interaction between
distant ponds. The DEM drainage analysis identified numerous sinks >3 m in depth
across the glacier surface, few of which exhibited ponds (23%), while the field
survey highlighted instances of surface water only explicable via englacial routes.
Taken together, our observations provide evidence for widespread supraglacial-englacial
connectivity of meltwater drainage paths. Results suggest that successive englacial
conduit collapse events, themselves likely driven by supraglacial pond drainage,
cause the glacier surface drainage system to evolve into a configuration following
relict englacial conduit systems. Within this system, ponds form in depressions
of reduced drainage efficiency and link the supraglacial and englacial drainage
networks.
article_number: '69'
article_processing_charge: No
article_type: original
author:
- first_name: Evan S.
full_name: Miles, Evan S.
last_name: Miles
- first_name: Jakob
full_name: Steiner, Jakob
last_name: Steiner
- first_name: Ian
full_name: Willis, Ian
last_name: Willis
- first_name: Pascal
full_name: Buri, Pascal
last_name: Buri
- first_name: Walter W.
full_name: Immerzeel, Walter W.
last_name: Immerzeel
- first_name: Anna
full_name: Chesnokova, Anna
last_name: Chesnokova
- first_name: Francesca
full_name: Pellicciotti, Francesca
id: b28f055a-81ea-11ed-b70c-a9fe7f7b0e70
last_name: Pellicciotti
citation:
ama: Miles ES, Steiner J, Willis I, et al. Pond dynamics and supraglacial-englacial
connectivity on debris-covered Lirung Glacier, Nepal. Frontiers in Earth Science.
2017;5. doi:10.3389/feart.2017.00069
apa: Miles, E. S., Steiner, J., Willis, I., Buri, P., Immerzeel, W. W., Chesnokova,
A., & Pellicciotti, F. (2017). Pond dynamics and supraglacial-englacial connectivity
on debris-covered Lirung Glacier, Nepal. Frontiers in Earth Science. Frontiers
Media. https://doi.org/10.3389/feart.2017.00069
chicago: Miles, Evan S., Jakob Steiner, Ian Willis, Pascal Buri, Walter W. Immerzeel,
Anna Chesnokova, and Francesca Pellicciotti. “Pond Dynamics and Supraglacial-Englacial
Connectivity on Debris-Covered Lirung Glacier, Nepal.” Frontiers in Earth Science.
Frontiers Media, 2017. https://doi.org/10.3389/feart.2017.00069.
ieee: E. S. Miles et al., “Pond dynamics and supraglacial-englacial connectivity
on debris-covered Lirung Glacier, Nepal,” Frontiers in Earth Science, vol.
5. Frontiers Media, 2017.
ista: Miles ES, Steiner J, Willis I, Buri P, Immerzeel WW, Chesnokova A, Pellicciotti
F. 2017. Pond dynamics and supraglacial-englacial connectivity on debris-covered
Lirung Glacier, Nepal. Frontiers in Earth Science. 5, 69.
mla: Miles, Evan S., et al. “Pond Dynamics and Supraglacial-Englacial Connectivity
on Debris-Covered Lirung Glacier, Nepal.” Frontiers in Earth Science, vol.
5, 69, Frontiers Media, 2017, doi:10.3389/feart.2017.00069.
short: E.S. Miles, J. Steiner, I. Willis, P. Buri, W.W. Immerzeel, A. Chesnokova,
F. Pellicciotti, Frontiers in Earth Science 5 (2017).
date_created: 2023-02-20T08:14:04Z
date_published: 2017-09-21T00:00:00Z
date_updated: 2023-02-28T11:13:23Z
day: '21'
doi: 10.3389/feart.2017.00069
extern: '1'
intvolume: ' 5'
keyword:
- General Earth and Planetary Sciences
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.3389/feart.2017.00069
month: '09'
oa: 1
oa_version: Published Version
publication: Frontiers in Earth Science
publication_identifier:
issn:
- 2296-6463
publication_status: published
publisher: Frontiers Media
quality_controlled: '1'
scopus_import: '1'
status: public
title: Pond dynamics and supraglacial-englacial connectivity on debris-covered Lirung
Glacier, Nepal
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 5
year: '2017'
...
---
_id: '12611'
abstract:
- lang: eng
text: 'We investigate the energy balance and ablation regimes of glaciers in high-elevation,
dry environments using glaciometeorological data collected on six glaciers in
the semiarid Andes of North-Central Chile (29–34°S, 3127–5324 m). We use a point-scale
physically based energy balance (EB) model and an enhanced Temperature-Index (ETI)
model that calculates melt rates only as a function of air temperature and net
shortwave radiation. At all sites, the largest energy inputs are net shortwave
and incoming longwave radiation, which are controlled by surface albedo and elevation,
respectively. Turbulent fluxes cancel each other out at the lower sites, but as
elevation increases, cold, dry and wind-exposed conditions increase the magnitude
of negative latent heat fluxes, associated with large surface sublimation rates.
In midsummer (January), ablation rates vary from 67.9 mm w.e. d−1 at the lowest
site (∼100% corresponding to melt), to 2.3 mm w.e. d−1 at the highest site (>85%
corresponding to surface sublimation). At low-elevation, low-albedo, melt-dominated
sites, the ETI model correctly reproduces melt using a large range of possible
parameters, but both the performance and parameter transferability decrease with
elevation for two main reasons: (i) the air temperature threshold approach for
melt onset does not capture the diurnal variability of melt in cold and strong
irradiated environments and (ii) energy losses decrease the correlation between
melt and net shortwave radiation. We summarize our results by means of an elevation
profile of ablation components that can be used as reference in future studies
of glacier ablation in the semiarid Andes.'
article_processing_charge: No
article_type: original
author:
- first_name: A.
full_name: Ayala, A.
last_name: Ayala
- first_name: Francesca
full_name: Pellicciotti, Francesca
id: b28f055a-81ea-11ed-b70c-a9fe7f7b0e70
last_name: Pellicciotti
- first_name: S.
full_name: MacDonell, S.
last_name: MacDonell
- first_name: J.
full_name: McPhee, J.
last_name: McPhee
- first_name: P.
full_name: Burlando, P.
last_name: Burlando
citation:
ama: 'Ayala A, Pellicciotti F, MacDonell S, McPhee J, Burlando P. Patterns of glacier
ablation across North-Central Chile: Identifying the limits of empirical melt
models under sublimation-favorable conditions. Water Resources Research.
2017;53(7):5601-5625. doi:10.1002/2016wr020126'
apa: 'Ayala, A., Pellicciotti, F., MacDonell, S., McPhee, J., & Burlando, P.
(2017). Patterns of glacier ablation across North-Central Chile: Identifying the
limits of empirical melt models under sublimation-favorable conditions. Water
Resources Research. American Geophysical Union. https://doi.org/10.1002/2016wr020126'
chicago: 'Ayala, A., Francesca Pellicciotti, S. MacDonell, J. McPhee, and P. Burlando.
“Patterns of Glacier Ablation across North-Central Chile: Identifying the Limits
of Empirical Melt Models under Sublimation-Favorable Conditions.” Water Resources
Research. American Geophysical Union, 2017. https://doi.org/10.1002/2016wr020126.'
ieee: 'A. Ayala, F. Pellicciotti, S. MacDonell, J. McPhee, and P. Burlando, “Patterns
of glacier ablation across North-Central Chile: Identifying the limits of empirical
melt models under sublimation-favorable conditions,” Water Resources Research,
vol. 53, no. 7. American Geophysical Union, pp. 5601–5625, 2017.'
ista: 'Ayala A, Pellicciotti F, MacDonell S, McPhee J, Burlando P. 2017. Patterns
of glacier ablation across North-Central Chile: Identifying the limits of empirical
melt models under sublimation-favorable conditions. Water Resources Research.
53(7), 5601–5625.'
mla: 'Ayala, A., et al. “Patterns of Glacier Ablation across North-Central Chile:
Identifying the Limits of Empirical Melt Models under Sublimation-Favorable Conditions.”
Water Resources Research, vol. 53, no. 7, American Geophysical Union, 2017,
pp. 5601–25, doi:10.1002/2016wr020126.'
short: A. Ayala, F. Pellicciotti, S. MacDonell, J. McPhee, P. Burlando, Water Resources
Research 53 (2017) 5601–5625.
date_created: 2023-02-20T08:14:10Z
date_published: 2017-07-10T00:00:00Z
date_updated: 2023-02-24T11:41:55Z
day: '10'
doi: 10.1002/2016wr020126
extern: '1'
intvolume: ' 53'
issue: '7'
keyword:
- Water Science and Technology
language:
- iso: eng
month: '07'
oa_version: None
page: 5601-5625
publication: Water Resources Research
publication_identifier:
issn:
- 0043-1397
publication_status: published
publisher: American Geophysical Union
quality_controlled: '1'
scopus_import: '1'
status: public
title: 'Patterns of glacier ablation across North-Central Chile: Identifying the limits
of empirical melt models under sublimation-favorable conditions'
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 53
year: '2017'
...
---
_id: '12612'
abstract:
- lang: eng
text: Supraglacial ponds play a key role in absorbing atmospheric energy and directing
it to the ice of debris-covered glaciers, but the spatial and temporal distribution
of these features is not well documented. We analyse 172 Landsat TM/ETM+ scenes
for the period 1999–2013 to identify thawed supraglacial ponds for the debris-covered
tongues of five glaciers in the Langtang Valley of Nepal. We apply an advanced
atmospheric correction routine (Landcor/6S) and use band ratio and image morphological
techniques to identify ponds and validate our results with 2.5 m Cartosat-1 observations.
We then characterize the spatial, seasonal and interannual patterns of ponds.
We find high variability in pond incidence between glaciers (May–October means
of 0.08–1.69% of debris area), with ponds most frequent in zones of low surface
gradient and velocity. The ponds show pronounced seasonality, appearing in the
pre-monsoon as snow melts, peaking at the monsoon onset at 2% of debris-covered
area, then declining in the post-monsoon as ponds drain or freeze. Ponds are highly
recurrent and persistent, with 40.5% of pond locations occurring for multiple
years. Rather than a trend in pond cover over the study period, we find high interannual
variability for each glacier after controlling for seasonality.
article_processing_charge: No
article_type: original
author:
- first_name: EVAN S.
full_name: MILES, EVAN S.
last_name: MILES
- first_name: IAN C.
full_name: WILLIS, IAN C.
last_name: WILLIS
- first_name: NEIL S.
full_name: ARNOLD, NEIL S.
last_name: ARNOLD
- first_name: JAKOB
full_name: STEINER, JAKOB
last_name: STEINER
- first_name: Francesca
full_name: Pellicciotti, Francesca
id: b28f055a-81ea-11ed-b70c-a9fe7f7b0e70
last_name: Pellicciotti
citation:
ama: MILES ES, WILLIS IC, ARNOLD NS, STEINER J, Pellicciotti F. Spatial, seasonal
and interannual variability of supraglacial ponds in the Langtang Valley of Nepal,
1999–2013. Journal of Glaciology. 2017;63(237):88-105. doi:10.1017/jog.2016.120
apa: MILES, E. S., WILLIS, I. C., ARNOLD, N. S., STEINER, J., & Pellicciotti,
F. (2017). Spatial, seasonal and interannual variability of supraglacial ponds
in the Langtang Valley of Nepal, 1999–2013. Journal of Glaciology. Cambridge
University Press. https://doi.org/10.1017/jog.2016.120
chicago: MILES, EVAN S., IAN C. WILLIS, NEIL S. ARNOLD, JAKOB STEINER, and Francesca
Pellicciotti. “Spatial, Seasonal and Interannual Variability of Supraglacial Ponds
in the Langtang Valley of Nepal, 1999–2013.” Journal of Glaciology. Cambridge
University Press, 2017. https://doi.org/10.1017/jog.2016.120.
ieee: E. S. MILES, I. C. WILLIS, N. S. ARNOLD, J. STEINER, and F. Pellicciotti,
“Spatial, seasonal and interannual variability of supraglacial ponds in the Langtang
Valley of Nepal, 1999–2013,” Journal of Glaciology, vol. 63, no. 237. Cambridge
University Press, pp. 88–105, 2017.
ista: MILES ES, WILLIS IC, ARNOLD NS, STEINER J, Pellicciotti F. 2017. Spatial,
seasonal and interannual variability of supraglacial ponds in the Langtang Valley
of Nepal, 1999–2013. Journal of Glaciology. 63(237), 88–105.
mla: MILES, EVAN S., et al. “Spatial, Seasonal and Interannual Variability of Supraglacial
Ponds in the Langtang Valley of Nepal, 1999–2013.” Journal of Glaciology,
vol. 63, no. 237, Cambridge University Press, 2017, pp. 88–105, doi:10.1017/jog.2016.120.
short: E.S. MILES, I.C. WILLIS, N.S. ARNOLD, J. STEINER, F. Pellicciotti, Journal
of Glaciology 63 (2017) 88–105.
date_created: 2023-02-20T08:14:16Z
date_published: 2017-02-01T00:00:00Z
date_updated: 2023-02-24T11:38:31Z
day: '01'
doi: 10.1017/jog.2016.120
extern: '1'
intvolume: ' 63'
issue: '237'
keyword:
- Earth-Surface Processes
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1017/jog.2016.120
month: '02'
oa: 1
oa_version: Published Version
page: 88-105
publication: Journal of Glaciology
publication_identifier:
eissn:
- 1727-5652
issn:
- 0022-1430
publication_status: published
publisher: Cambridge University Press
quality_controlled: '1'
scopus_import: '1'
status: public
title: Spatial, seasonal and interannual variability of supraglacial ponds in the
Langtang Valley of Nepal, 1999–2013
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 63
year: '2017'
...
---
_id: '12905'
article_processing_charge: No
author:
- first_name: Alois
full_name: Schlögl, Alois
id: 45BF87EE-F248-11E8-B48F-1D18A9856A87
last_name: Schlögl
orcid: 0000-0002-5621-8100
- first_name: Janos
full_name: Kiss, Janos
id: 3D3A06F8-F248-11E8-B48F-1D18A9856A87
last_name: Kiss
citation:
ama: 'Schlögl A, Kiss J. Scientific Computing at IST Austria. In: AHPC17 – Austrian
HPC Meeting 2017. FSP Scientific Computing; 2017:28.'
apa: 'Schlögl, A., & Kiss, J. (2017). Scientific Computing at IST Austria. In
AHPC17 – Austrian HPC Meeting 2017 (p. 28). Grundlsee, Austria: FSP Scientific
Computing.'
chicago: Schlögl, Alois, and Janos Kiss. “Scientific Computing at IST Austria.”
In AHPC17 – Austrian HPC Meeting 2017, 28. FSP Scientific Computing, 2017.
ieee: A. Schlögl and J. Kiss, “Scientific Computing at IST Austria,” in AHPC17
– Austrian HPC Meeting 2017, Grundlsee, Austria, 2017, p. 28.
ista: 'Schlögl A, Kiss J. 2017. Scientific Computing at IST Austria. AHPC17 – Austrian
HPC Meeting 2017. AHPC: Austrian HPC Meeting, 28.'
mla: Schlögl, Alois, and Janos Kiss. “Scientific Computing at IST Austria.” AHPC17
– Austrian HPC Meeting 2017, FSP Scientific Computing, 2017, p. 28.
short: A. Schlögl, J. Kiss, in:, AHPC17 – Austrian HPC Meeting 2017, FSP Scientific
Computing, 2017, p. 28.
conference:
end_date: 2017-03-03
location: Grundlsee, Austria
name: 'AHPC: Austrian HPC Meeting'
start_date: 2017-03-01
date_created: 2023-05-05T12:58:53Z
date_published: 2017-03-03T00:00:00Z
date_updated: 2023-05-16T07:22:23Z
day: '03'
ddc:
- '000'
department:
- _id: ScienComp
file:
- access_level: open_access
checksum: 7bcc499479d4f4c5ce6c0071c24ca6c6
content_type: application/pdf
creator: dernst
date_created: 2023-05-16T07:20:50Z
date_updated: 2023-05-16T07:20:50Z
file_id: '12969'
file_name: 2017_AHPC_Schloegl.pdf
file_size: 1005486
relation: main_file
success: 1
file_date_updated: 2023-05-16T07:20:50Z
has_accepted_license: '1'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://vsc.ac.at/fileadmin/user_upload/vsc/conferences/ahpc17/BOOKLET_AHPC17.pdf
month: '03'
oa: 1
oa_version: Published Version
page: '28'
publication: AHPC17 – Austrian HPC Meeting 2017
publication_status: published
publisher: FSP Scientific Computing
status: public
title: Scientific Computing at IST Austria
type: conference_abstract
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
year: '2017'
...