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Genome-wide analysis of distributions of densities of long-range interactions of human chromosomes with each other, nucleoli, nuclear lamina, and binding sites of chromatin state regulatory proteins, CTCF and STAT1, identifies non-random…

基因组学 · 定量生物学 2014-01-13 Gennadi V. Glinsky

The statistical properties of intra-chromosome maps obtained by a genome-wide chromosome conformation capture method (Hi-C) are described in the framework of the hierarchical crumpling model of heteropolymer chain with quenched disorder in…

基因组学 · 定量生物学 2013-12-02 L. Nazarov , M. V. Tamm , S. K. Nechaev , V. A. Avetisov

We derive an unbiased information theoretic energy landscape for chromosomes at metaphase using a maximum entropy approach that accurately reproduces the details of the experimentally measured pair-wise contact probabilities between genomic…

生物物理 · 物理学 2016-06-22 Bin Zhang , Peter G. Wolynes

Correlation measurements indicate that excess two particle correlations extend over causally disconnected rapidity ranges. Although, this enhancement is broad in relative rapidity $\eta=\eta_1 - \eta_2$, it is focused in a narrow region in…

核理论 · 物理学 2009-11-03 George Moschelli , Sean Gavin

Three-dimensional (3D) chromatin structure is closely related to genome function, in particular transcription. However, the folding path of the chromatin fiber in the interphase nucleus is unknown. Here, we systematically measured the 3D…

Context. Fine-scale structures of the solar chromosphere, particularly fibrils, are known to host various types of magnetohydrodynamic (MHD) waves that can transport energy to the corona. In particular, absorption features observed in the…

太阳与恒星天体物理 · 物理学 2025-05-01 E. Petrova , T. Van Doorsselaere , M. van Noort , D. Berghmans , J. S. Castellanos Durán

Modern biological techniques such as Hi-C permit to measure probabilities that different chromosomal regions are close in space. These probabilities can be visualised as matrices called contact maps. In this paper, we introduce a…

生物大分子 · 定量生物学 2020-10-21 Simone Pigolotti , Mogens H. Jensen , Yinxiu Zhan , Guido Tiana

The problem of chromatic thresholds seeks for minimum degree conditions that ensure $H$-free graphs to have a bounded chromatic number, or equivalently a bounded size homomorphic image. The strengthened homomorphism thresholds problem…

组合数学 · 数学 2025-02-14 Xinqi Huang , Hong Liu , Mingyuan Rong , Zixiang Xu

Previous work utilising NASA's High-resolution Coronal Imager (Hi-C 2.1) 17.2 nm observations revealed that, even at the increased spatial scales available in the data-set, there may be evidence for coronal structures that are still not…

太阳与恒星天体物理 · 物理学 2020-10-21 Thomas Williams , Robert W. Walsh , Hardi Peter , Amy R. Winebarger

We demonstrate the existence of a pair of almost dissipationless oscillating modes at low temperatures in both the shear and sound channels of a hybrid quantum system, comprised of a weakly self-interacting perturbative sector coupled to…

高能物理 - 理论 · 物理学 2026-05-19 Toshali Mitra , Sukrut Mondkar , Ayan Mukhopadhyay , Alexander Soloviev

Much of coronal hole (CH) research is focused upon determining the boundary and calculating the open flux as accurately as possible. However, the observed boundary itself is worthy of investigation, and holds important clues to the physics…

太阳与恒星天体物理 · 物理学 2022-10-05 Emily I. Mason , Vadim M. Uritsky

We study theoretically and experimentally a novel type of metamaterial with hybrid elements composed of twisted pairs of cross-shaped meta-atoms and their complements. We reveal that such two-layer metasurfaces demonstrate large,…

光学 · 物理学 2015-06-18 Kirsty Hannam , David A. Powell , Ilya V. Shadrivov , Yuri S. Kivshar

Classic solar models put the Chromosphere-Corona Transition Region (CCTR} at $\sim2$Mm above the $\tau_{5000} = 1$ level, whereas rMHD models place it in a wider range of heights. Observational verification is scarce. We review and discuss…

太阳与恒星天体物理 · 物理学 2022-07-08 C. E. Alissandrakis

We determine magnetic fields from the photosphere to the upper chromosphere combining data from the Hinode satellite and the CLASP2.1 sounding rocket experiment. CLASP2.1 provided polarization profiles of the Mg~{|sc ii} $h$ and $k$ lines,…

We perform a theoretical investigation on the Goos-H\"achen (GH) shift in one-dimensional photonic crystals (1DPCs) containing left-handed metamaterials (LHMs). We find an unusal effect of the GH shift near the photonic band-crossing…

光学 · 物理学 2009-05-12 Li-Gang Wang , Shi-Yao Zhu

Using an effective genetic algorithm, we uncover the structure of a metastable Al41Sm5 phase that supplements its family sharing similar short-range orders. The phase evolves upon heating an amorphous Al-9.7at.%Sm ribbon, produced by…

This is the first measurement and detection of coherence in the intergalactic medium (IGM) at substantially high redshift (z~3.8) and on large physical scales (~2.5 h^-1 Mpc). We perform the measurement by presenting new observations from…

天体物理学 · 物理学 2009-11-13 Caitlin M. Casey , Christopher D. Impey , Catherine E. Petry , Andrew R. Marble , Romeel Dave

The jamming transition characterizes athermal systems of particles interacting via finite range repulsive potentials, and occurs on increasing the density when particles cannot avoid making contacts with those of their first coordination…

软凝聚态物质 · 物理学 2012-10-12 M. Pica Ciamarra , P. Sollich

Inter-core skew (ICS), the differential group delay between cores of a multicore fiber (MCF), is a critical parameter for both classical space-division multiplexed communications and quantum photonic networks. We present a high-precision…

Type II second-harmonic generation was performed in a 15.8-mm-long KTiOPO4 micrometric ridge waveguide with an average transversal section of 38 micrometer^2. Theoretical predictions are compared with experiments. Strong agreements are…

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