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RNA polymerase II pausing regulates a quiescence-dependent transcriptional program, priming cells for cell cycle reentry
[article]
2018
bioRxiv
pre-print
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We propose a model wherein Pol II pausing restrains transcription to maintain G0, preconfigures gene networks required for the G0-G1 transition, and sets the timing of their transcriptional activation. ...
Finally, we uncover a novel, unexpected repressive role of the super-elongation complex component Aff4 in G0-specific stalling. ...
Left panel = Equal cell number normalization: Group B transcript used as reference for normalization and histogram shows their value is close to zero. ...
doi:10.1101/250910
fatcat:sfhr4snqanctrlf3sydaaacxre
Self-organization of self-clearing beating patterns in an array of locally interacting ciliated cells formulated as an adaptive Boolean network
2019
Theory in biosciences
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Here, we present a simplified pluricellular epithelium model, which intends to make the self-organization of ciliary beating patterns as well as of the associated fluid transport across the airway epithelium ...
In particular, the dynamical response of the network with respect to variations of the boundary conditions, updating schemes (representing intercellular signaling mechanisms) and the proportion of ciliated ...
Figure 19 illustrates the frequency distribution of functioning (dark gray bars) as well as malfunctioning (bright gray bars) parameter sets considering their corresponding | g0 |-classes (10 logarithmically ...
doi:10.1007/s12064-019-00299-x
pmid:31350677
pmcid:PMC6994478
fatcat:2r2eyscf7fgr7nqcevkoezzql4
A chan-vese model based on the Markov chain for unsupervised medical image segmentation
2021
Tsinghua Science and Technology
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Our method exploits abundant boundary and local region information in segmentation and thus can handle images with intensity inhomogeneity and object sparsity. ...
In some subsequent experiments on parameters, we use 19 CT slices of one patient (referred to as MINI-CVIP). ...
Most unsupervised image segmentation approaches involve utilizing features, such as color, brightness, or texture over local patches, and then perform pixel level clustering based on these features. ...
doi:10.26599/tst.2020.9010042
fatcat:4dqoe3y64zeypmftad42g2xhbe
Super-Tonks-Girardeau quench of dipolar bosons in a one-dimensional optical lattice
[article]
2024
arXiv
pre-print
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By calculating particle density, correlations, entropy measures, and natural occupations, we establish the regimes of stability as a function of dipolar interaction strength. ...
The other parameters are V0 ≈ 20Er and |g0| ≈ 81Er. The dotted lines indicate the system boundaries.
FIG. 2 . 2 FIG. 2. ...
The other parameters are V0 ≈ 20Er and |g0| ≈ 81Er. The dotted lines indicate the system boundaries.
FIG. 8 . 8 FIG. 8. ...
arXiv:2401.10317v1
fatcat:qffdqzivwrg7lll4nn4kh2q6w4
Tidal disruption of stellar clusters and their remnants' spatial distribution near the galactic center
[article]
2022
arXiv
pre-print
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We consider an evolved power-law potential (with α = 0.5) and an evolved two-component potential (with α = 0.5 and f • (R g ) = 0.01) where ρ g0 increases exponentially as ρ g0 (t) = ρ g0 (0)e Rρt . ( ...
For a static power-law galactic potential, it can be approximated as: ∆ρ g ρ g0 R g R − ∆R α − R g R + ∆R α ≈ 2αρ g0 R α g ∆R 1 R α+1 (21) where ∆R is the maximum difference of R for the star (traveling ...
arXiv:2212.09215v1
fatcat:pvzn3nlr2rhcpfytku3wt6e5vm
Characterisation of red supergiants in theGaiaspectral range
2016
Astronomy and Astrophysics
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In addition, it is capable to separate most of the non-SGs in the sample, identifying as SGs only a very small fraction of them. ...
Using the principal components, we develop an automatised method to differentiate CSGs from other bright late-type stars, and to classify them. ...
by those objects considered equal or later than the given putative boundary. ...
doi:10.1051/0004-6361/201628422
fatcat:zqe2aulb7zhdxldmgykmsd33ay
The red supergiant population in the Perseus arm
2017
Monthly notices of the Royal Astronomical Society
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We confirm that our method is as efficient at finding supergiants as the best classical methods, but with a far lower contamination by red giants than any other method. ...
We compare our identification with a classification done using classical criteria and discuss their respective efficiencies and contaminations as identification methods. ...
As the Ib-II subclass is the boundary between SGs (LC I) and bright giants (LC II), the morphology of the objects with this tag is intermediate. ...
doi:10.1093/mnras/stx3317
fatcat:nfk7g52lkvfktitpbxmdhmkudm
Tidal Disruption of Stellar Clusters and the Spatial Distribution of Their Remnants Near the Galactic Center
2023
Astrophysical Journal
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The NoTide model is shown as a dashed curve for reference. ...
The NoTide model is shown as a dashed curve for reference.
Figure 8 . 8 Figure 8. ...
The major impact is the evolution of r t as R decreases. The speed of the inspiral as controlled by r does not suppress tidal compression but only affects the timescale. ...
doi:10.3847/1538-4357/acac97
fatcat:mp3pozud4new3mz7mmgswm73w4
Constraining the structure of the planet-forming region in the disk of the Herbig Be star HD 100546
2011
Astronomy and Astrophysics
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Date
Baseline
Projected
PA
Date
Baseline
Projected
PA
length (m)
( • )
length (m)
( • )
2009-01-06
H0-E0
48
42
2009-04-24
H0-E0
44
-76
G0-E0
16
42
G0-E0
15
-76
H0-G0
32
42 ...
H0-G0
29
-76
2009-04-05
D0-H0
62
66
2009-04-25
H0-E0
44
-74
G1-D0
61
119
G0-E0
15
-74
G1-H0
52
6
H0-G0
29
-74
2009-04-08
K0-A0
125
72
2009-04-30
D0-H0
62
77
G1-A0
85
106 ...
doi:10.1051/0004-6361/201016165
fatcat:zajsxyqr2nfqbhw6haze62oeyq
Review of x-ray free-electron laser theory
2007
Physical Review Special Topics. Accelerators and Beams
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High-gain free-electron lasers (FELs) are being developed as extremely bright sources for a next-generation x-ray facility. ...
Abstract High-gain free-electron lasers (FELs) are being developed as extremely bright sources for a nextgeneration x-ray facility. ...
Hence, the radiation power builds up as P ∝ exp(z/L G0 ), with L G0 = λ u /(4π √ 3ρ) as in Eq. (6).
F. ...
doi:10.1103/physrevstab.10.034801
fatcat:k4yuxxfjbjhtfcvqak6vstpv4e
Photodissociation and X-Ray Dominated Regions
[article]
2022
arXiv
pre-print
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In this review, we describe the dominant thermal, chemical, and radiation transfer processes in PDRs and XDRs, as well as a brief description of models and their use to analyze observations. ...
Their interpretation is, however, in dispute as observations suggest a prominent role for stellar winds while they are much less important in theoretical models. ∙ A significant fraction of molecular mass ...
These are usually interpreted as the bright classic PDRs. ...
arXiv:2202.05867v2
fatcat:twbj6o75uvd77k23fbn4jj36du
Lopsided Galaxies, Weak Interactions, and Boosting the Star Formation Rate
2000
Astrophysical Journal
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We quantify lopsidedness as the amplitude of the m=1 Fourier component of the azimuthal surface brightness distribution, averaged over a range of radii. ...
Using the evolutionary population synthesis code of Bruzual & Charlot we model the spectra as an "underlying population" and a superimposed "boost population" with the aim of constraining the fractional ...
We quantify lopsidedness as the amplitude of the m \ 1 Fourier component of the SA3 1 T azimuthal surface brightness distribution averaged over a range of radii. ...
doi:10.1086/309169
fatcat:vqn3cm2ambczbf3uerkdnj3uci
Stability and dynamics of two-soliton molecules
[article]
2010
arXiv
pre-print
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The problem of soliton-soliton force is revisited. ...
We investigate the molecule's stability against perturbations such as reflection from surfaces, scattering by barriers, and collisions with other solitons. ...
This agrees with our earlier result that two equal solitons with zero relative speed and finite separation, do not exist as an exact solution.
C. ...
arXiv:1004.3000v3
fatcat:e5jnsb74cjexphnza7ihbkezx4
Using UAS Hyperspatial RGB Imagery for Identifying Beach Zones along the South Texas Coast
2017
Remote Sensing
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The analysis of shoreline variability usually uses a group of shoreline indicators visibly discernible in coastal imagery, such as the seaward vegetation line, wet beach/dry beach line, and instantaneous ...
Patterns with a U value of less than or equal to two are designated as "uniform". ...
Texture Features The similar land objects may have similar geometric patterns as manifested by grey-level variation in an image, which is referred to as texture. ...
doi:10.3390/rs9020159
fatcat:vinquqp6yfdunchwtffrzwnms4
Spectral classification of stars based on LAMOST spectra
[article]
2015
arXiv
pre-print
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About 40% of the OB and K type stars are mis-classified as A and G type stars, respectively. ...
The equivalentwidths of the prominent spectral lines, playing the similar role as the multi-color photometry, form a clean stellar locus well ordered by MK classes. ...
To be convenient, we also mark the averaged effective temperatures along the stellar loci as the reference. ...
arXiv:1505.05940v1
fatcat:m2m5s4byh5fxjciwflvam6bzuq
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