cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
LOFAR: Recent imaging results & future prospects
Creators: name: Heald, George
name: Bell, Michael R.
name: Horneffer, Andreas
name: Offringa, André R.
name: Pizzo, Roberto
name: van der Tol, Sebastiaan
name: van Weeren, Reinout J.
name: van Zwieten, Joris E.
name: Anderson, James M.
name: Beck, Rainer
name: van Bemmel, Ilse
name: Bîrzan, Laura
name: Bonafede, Annalisa
name: Conway, John
name: Ferrari, Chiara
name: De Gasperin, Francesco
name: Haverkorn, Marijke
name: Jackson, Neal
name: Macario, Giulia
name: McKean, John
name: Miraghaei, Halime
name: Orrù, Emanuela
name: Rafferty, David
name: Röttgering, Huub
name: Scaife, Anna
name: Shulevski, Aleksandar
name: Sotomayor, Carlos
name: Tasse, Cyril
name: Trasatti, Monica
name: Wucknitz, Olaf
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The Low Frequency Array (LOFAR) is under construction in the Netherlands and in several surrounding European countries. In this contribution, we describe the layout and design of the telescope, with a particular emphasis on the imaging characteristics of the array when used in its "standard imaging" mode. After briefly reviewing the calibration and imaging software used for LOFAR image processing, we show some recent results from the ongoing imaging commissioning efforts. We conclude by summarizing future prospects for the use of LOFAR in observing the little-explored low frequency Universe.
description: Accepted for publication in special issue of Journal of Astrophysics and Astronomy: conference proceedings of "Diffuse Relativistic Plasmas" conference, Bangalore, 1-4 March 2011
Credit Risk, Market Sentiment and Randomly-Timed Default
Creators: name: Brody, Dorje C.
name: Hughston, Lane P.
name: Macrina, Andrea
Publisher: name: arXiv
Year: 2010
Subjects: subject: Pricing of Securities (q-fin.PR)
subject: FOS: Economics and business

description: We propose a model for the credit markets in which the random default times of bonds are assumed to be given as functions of one or more independent "market factors". Market participants are assumed to have partial information about each of the market factors, represented by the values of a set of market factor information processes. The market filtration is taken to be generated jointly by the various information processes and by the default indicator processes of the various bonds. The value of a discount bond is obtained by taking the discounted expectation of the value of the default indicator function at the maturity of the bond, conditional on the information provided by the market filtration. Explicit expressions are derived for the bond price processes and the associated default hazard rates. The latter are not given a priori as part of the model but rather are deduced and shown to be functions of the values of the information processes. Thus the "perceived" hazard rates, based on the available information, determine bond prices, and as perceptions change so do the prices. In conclusion, explicit expressions are derived for options on discount bonds, the values of which also fluctuate in line with the vicissitudes of market sentiment.
description: To appear in: Stochastic Analysis in 2010, Edited by D. Crisan, Springer Verlag
Defect Formation Preempts Dynamical Symmetry Breaking in Closed Quantum Systems
Creators: name: Ortix, Carmine
name: Rijnbeek, Jorrit
name: Brink, Jeroen van den
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Physics (quant-ph)
subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We show that no matter how slowly a quantum-to-classical symmetry breaking process is driven, the adiabatic limit can never be reached in a macroscopic body. Massive defect formation preempts an adiabatic quantum-classical crossover and triggers the appearance of a symmetric non-equilibrium state that recursively collapses into the classical state, breaking the symmetry at punctured times. The presence of this state allows the quantum-classical transition to be investigated and controlled in mesoscopic devices by supplying externally the proper dynamical symmetry breaking perturbation.
description: 4 pages, 4 figures
Majorana vortex modes in spin-singlet chiral superconductors with noncollinear spin ordering: Local density of states study
Creators: name: Zlotnikov, A. O.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: In the present study topologically nontrivial edge and vortex bound states are described in the coexistence phase of chiral spin-singlet superconductivity and noncollinear spin ordering on a triangular lattice in the presence of few (up to four) vortices. We consider the topological phase transition induced by the magnetic order between the phase hosting Majorana modes and the initial phase of the chiral d-wave superconductivity supporting non-Majorana modes which is also topologically nontrivial. The change of the excitation spectrum at the critical point is obtained in both cases of open and periodic boundary conditions in the presence of vortices. It is proved that zero energy Majorana modes localized at vortex cores are caused by noncollinear long-range magnetic ordering. Even though nearby excitation energies of subgap states including the edge-localized and vortex-localized states are very close to each other, the energy difference between different vortex bound states is an order of magnitude higher. This difference determines the energy gap for Majorana vortex modes separating them from other vortex bound states. It is found that even in the presence of noncollinear spin ordering its value can be estimated from the excitation energy of vortex bound states in the pure chiral d-wave state for the nonmagnetic case. By studying local density of states near the vortex cores the possibility to experimentally detect the described Majorana vortex modes by scanning tunneling microscopy is discussed. It is demonstrated that Majorana vortex modes and Majorana antivortex modes induced by noncollinear magnetism have different features in energy and spatially resolved density of states due to the chiral symmetry on the superconducting order parameter.
description: 17 pages, 13 figures, revised version, accepted in Physical Review B
Time Series, Stochastic Processes and Completeness of Quantum Theory
Creators: name: Kupczynski, Marian
Publisher: name: arXiv
Year: 2010
Subjects: subject: Quantum Physics (quant-ph)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Physical sciences

description: Most of physical experiments are usually described as repeated measurements of some random variables. The experimental data registered by on-line computers form time series of outcomes. The frequencies of different outcomes are compared with the probabilities provided by the algorithms of quantum theory (QT). In spite of statistical predictions of QT a claim was made that the theory provided the most complete description of the data and of the underlying physical phenomena. This claim could be easily rejected if some fine structures, averaged out in standard statistical descriptive analysis, were found in the time series of experimental data. To search for these structures one has to use more subtle statistical tools which were developed to study time series produced by various stochastic processes. In this talk we review some of these tools. As an example we show how the standard descriptive statistical analysis of the data is unable to reveal a fine structure in a simulated sample of AR(2) stochastic process. We emphasize once again that the violation of Bell inequalities gives no information on the completeness or the non locality of QT. The appropriate way to test the completeness of quantum theory is to search for fine structures in time series of experimental data by means of the purity tests or by studying the autocorrelation and partial autocorrelation functions.
description: 7 pages, 3 figures, to be published in AQT Proceedings Vaxjo 2010, AIP Conference Series
Curves intersecting in a circuit pattern
Creators: name: Ryffel, Levi
Publisher: name: arXiv
Year: 2022
Subjects: subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: 57K20 (Primary) 20F36 (Secondary)

description: We show that the cycle relation between Dehn twists about curves in a circuit detects whether the circuit bounds an embedded disc. This is done by determining the isomorphism type of the group generated by said Dehn twists for various surfaces.
description: 15 pages, 11 figures. Version accepted for publication in TAIA
Additional file 1 of Gene regulation network analyses of pistil development in papaya
Creators: name: Liao, Zhenyang
name: Dong, Fei
name: Liu, Juan
name: Xu, Lele
name: Marshall-Colon, Amy
name: Ming, Ray
Publisher: name: figshare
Year: 2022
Subjects: subject: Genetics
subject: FOS: Biological sciences
subject: Plant Biology

description: Additional file 1. The heatmap of the biological repeat correlation analysis of RNA-seq data samples. The suffixes 1, 2, and 3 represent three repeats, and the leaf sample has only two repeats. F, Female; M, Male; S, stage; L, leaf; FS1, Female stage1; and so on.
Plasmons in Z2 Topological Insulators
Creators: name: Guan, Yuling
name: Haas, Stephan
name: Schlomer, Henning
name: Jiang, Zhihao
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We study plasmonic excitations in the Kane-Mele model, a two-dimensional Z2 topological insulator on the honeycomb lattice, using the random phase approximation (RPA). In the topologically non-trivial phase, the model has conducting edge states that traverse the bulk energy gap and display spin-momentum-locking. Such a state of matter is called the quantum spin hall (QSH) phase, which is robust against time-reversal (TR) invariant perturbations. We find that in the QSH phase, gapless spin-polarized plasmons can be excited on the edges of the system. The propagation of these plasmons is chiral for each individual spin component and shows spin-momentum-locking for both spin components on the same edge. Moreover, we study the effect of external magnetic fields on the gapless edge plasmons. Specifically, out-of-plane magnetic fields delocalize edge plasmons propagating in one direction without affecting the other one, while an in-plane magnetic field can be applied to selectively excite a specific spin-plasmon branch with proper doping or gating to the system. Our findings may have potential applications in novel plasmonic and spintronic devices. We also investigate plasmons in the Kane-Mele model on a finite-sized diamond-shaped nanoflake and observe low-energy plasmons circulating the boundary of the material.
description: 11 pages, 12 figures
Planetesimals in Debris Disks of Sun-like Stars
Creators: name: Shannon, Andrew B.
name: Wu, Yanqin
Publisher: name: arXiv
Year: 2011
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Observations of dusty debris disks can be used to test theories of planetesimal coagulation. Planetesimals of sizes up to a couple thousand kms are embedded in these disks and their mutual collisions generate the small dust grains that are observed. The dust luminosities, when combined with information on the dust spatial extent and the system age, can be used to infer initial masses in the planetesimal belts. Carrying out such a procedure for a sample of debris disks around Sun-like stars, we reach the following two conclusions. First, if we assume that colliding planetesimals satisfy a primordial size spectrum of the form dn/ds ~ s^{-q}, observed disks strongly favor a value of q between 3.5 and 4, while both current theoretical expectations and statistics of Kuiper belt objects favor a somewhat larger value. Second, number densities of planetesimals are two to three orders of magnitude higher in detected disks than in the Kuiper belt, for comparably-sized objects. This is a surprise for the coagulation models. It would require a similar increase in the solid surface density of the primordial disk over that of the Minimum Mass Solar Nebula, which is unreasonable. Both of our conclusions are driven by the need to explain the presence of bright debris disks at a few Gyrs of age.
description: Submitted to ApJ
Converting Divergent Weak-Coupling into Exponentially Fast Convergent Strong-Coupling Expansions
Creators: name: Kleinert, H.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Mathematical Physics (math-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: With the help of a simple variational procedure it is possible to convert the partial sums of order $N$ of many divergent series expansions $f(g)=\sum_{n=0}^\infty a_n g^n$ into partial sums $\sum_{n=0}^N b_n g^{- ωn}$, where $0
description: 32 pages
Densest local packing diversity. II. Application to three dimensions
Creators: name: Hopkins, Adam B.
name: Stillinger, Frank H.
name: Torquato, Salvatore
Publisher: name: arXiv
Year: 2010
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Metric Geometry (math.MG)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: The densest local packings of N three-dimensional identical nonoverlapping spheres within a radius Rmin(N) of a fixed central sphere of the same size are obtained for selected values of N up to N = 1054. In the predecessor to this paper [A.B. Hopkins, F.H. Stillinger and S. Torquato, Phys. Rev. E 81 041305 (2010)], we described our method for finding the putative densest packings of N spheres in d-dimensional Euclidean space Rd and presented those packings in R2 for values of N up to N = 348. We analyze the properties and characteristics of the densest local packings in R3 and employ knowledge of the Rmin(N), using methods applicable in any d, to construct both a realizability condition for pair correlation functions of sphere packings and an upper bound on the maximal density of infinite sphere packings. In R3, we find wide variability in the densest local packings, including a multitude of packing symmetries such as perfect tetrahedral and imperfect icosahedral symmetry. We compare the densest local packings of N spheres near a central sphere to minimal-energy configurations of N+1 points interacting with short-range repulsive and long-range attractive pair potentials, e.g., 12-6 Lennard-Jones, and find that they are in general completely different, a result that has possible implications for nucleation theory. We also compare the densest local packings to finite subsets of stacking variants of the densest infinite packings in R3 (the Barlow packings) and find that the densest local packings are almost always most similar, as measured by a similarity metric, to the subsets of Barlow packings with the smallest number of coordination shells measured about a single central sphere, e.g., a subset of the FCC Barlow packing. We additionally observe that the densest local packings are dominated by the spheres arranged with centers at precisely distance Rmin(N) from the fixed sphere's center.
description: 45 pages, 18 figures, 2 tables
Electrical switching of a moiré ferroelectric superconductor
Creators: name: Klein, Dahlia R.
name: Xia, Li-Qiao
name: MacNeill, David
name: Watanabe, Kenji
name: Taniguchi, Takashi
name: Jarillo-Herrero, Pablo
Publisher: name: arXiv
Year: 2022
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Electrical control of superconductivity is critical for nanoscale superconducting circuits including cryogenic memory elements, superconducting field-effect transistors (FETs), and gate-tunable qubits. Superconducting FETs operate through continuous tuning of carrier density, but there has not yet been a bistable superconducting FET, which could serve as a new type of cryogenic memory element. Recently, unusual ferroelectricity in Bernal-stacked bilayer graphene aligned to its insulating hexagonal boron nitride (BN) gate dielectrics was discovered. Here, we report the observation of ferroelectricity in magic-angle twisted bilayer graphene (MATBG) with aligned BN layers. This ferroelectric behavior coexists alongside the strongly correlated electron system of MATBG without disrupting its correlated insulator or superconducting states. This all-van der Waals platform enables configurable switching between different electronic states of this rich system. To illustrate this new approach, we demonstrate reproducible bistable switching between the superconducting, metallic, and correlated insulator states of MATBG using gate voltage or electric displacement field. These experiments unlock the potential to broadly incorporate this new moiré ferroelectric superconductor into highly tunable superconducting electronics.
Construction of a photon position operator with commuting components from natural axioms
Creators: name: Dobrski, Michal
name: Przanowski, Maciej
name: Tosiek, Jaromir
name: Turrubiates, Francisco J.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A general form of the photon position operator with commuting components fulfilling some natural axioms is obtained. This operator commutes with the photon helicity operator, is Hermitian with respect to the Bialynicki-Birula scalar product and defined up to a unitary transformation preserving the transversality condition. It is shown that, using the procedure analogous to the one introduced by T. T. Wu and C. N. Yang for the case of the Dirac magnetic monopole, the photon position operator can be defined by a flat connection in some trivial vector bundle over $\mathbb{R}^3 \setminus \{(0,0,0)\}$. This observation enables us to reformulate quantum mechanics of a~single photon on $(\mathbb{R}^{3} \setminus \{(0,0,0)\}) \times \mathbb{C}^2$.
description: 19 pages, some corrections, to appear in Phys. Rev. A
Discrete ambiguities in a partial-wave analysis of pseudoscalar photoproduction with truncation in total angular momentum
Creators: name: Fix, A.
name: Dementjev, I.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The discrete ambiguities appearing in the complete experiment problem for single pseudoscalar meson photoproduction within truncated partial-wave analysis are discussed. It is shown that, in addition to the double ambiguity known from previous works, it is always necessary to take into account another ambiguity arising when truncation in total angular momentum is employed.
Role of the KNAT7 transcription factor in diurnal regulation of lignin biosynthetic genes and resource allocation in Arabidopsis thaliana
Creators: name: Das, Orpita
Publisher: name: University of British Columbia
Year: 2016

description: Lignified secondary cell walls in plants represent an irreversibly deposited final metabolic sink for global fixed carbon reserves and synthesis of these walls is an energetically expensive process for the plant; hence it follows that spatial-temporal control of secondary cell wall biosynthesis must be closely co-ordinated with carbon metabolism. The function of the KNOTTED ARABIDOPSIS THALIANA 7 (KNAT7) homeodomain protein, a repressor of transcription and part of the multi-level network of transcription factors regulating secondary cell wall biosynthesis and deposition, was studied to investigate its potential role in diurnal regulation of a set of lignin biosynthetic genes (LBGs) in Arabidopsis thaliana. I found that in young wild-type seedlings, transcript accumulation levels of LBGs grown in long day conditions vary diurnally but most do not show a change in temporal variation over a daily light-dark cycle in the knat7 mutant. Diurnal patterns of LBG transcript accumulation were less clear in mature wild-type inflorescence stem tissue, however diurnal expression at subjective 'dawn' was altered for some LBGs in knat7, providing evidence for a function for KNAT7 as a diurnal regulator of LBG expression in actively lignifying tissue. A diurnal regulatory function for KNAT7 is also supported by the presence of a hypocotyl elongation phenotype as well as by an altered timing to floral transition in KNAT7 mutants, phenotypes commonly displayed by mutants defective in clock regulation. Further, evidence for KNAT7 function as an activator of diurnal transcription of 3-DEOXY-D-ARABINO-HEPTULOSONATE 7-PHOSPHATE SYNTHASE 1 (DHS1) was observed in seedlings while in stems KNAT7 seemed to function as a repressor of LBGs. KNAT7 temporal expression variation itself shows minimal change in seedling and stem tissue grown in longday conditions, suggesting that post transcriptional mechanisms, such as protein-protein interactions, may be important for modulating KNAT7 functions diurnally. Overall, my data provides support for the hypothesis that diurnal regulation of transcript abundance is a function of KNAT7 in seedlings and mature stem tissue, which may represent a means to fine-tune resource (sucrose and starch) allocation to secondary cell wall biosynthesis coordinated with diurnal fluctuations in availability.
Additional file 7 of Gene regulation network analyses of pistil development in papaya
Creators: name: Liao, Zhenyang
name: Dong, Fei
name: Liu, Juan
name: Xu, Lele
name: Marshall-Colon, Amy
name: Ming, Ray
Publisher: name: figshare
Year: 2022
Subjects: subject: Genetics
subject: FOS: Biological sciences
subject: Plant Biology

description: Additional file 7. Bar chart of differentially expressed transcription factors between females and males at different stages. The abscissa shows the different transcription factor families. Different colors represent different stages of pistil development.
On the importance of separators as sites of 3D magnetic reconnection
Creators: name: Parnell, Clare E
Publisher: name: arXiv
Year: 2024
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Plasma Physics (physics.plasm-ph)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: For 3D magnetic reconnection to occur there must exist a volume within which the electric field component parallel to the magnetic field is non-zero. In numerical experiments, locations of non-zero parallel electric field indicate sites of 3D magnetic reconnection. If these experiments contain all types of topological feature (null points, separatrix surfaces, spines and separators) then comparing topological features with the reconnection sites reveals that all the reconnection sites are threaded by separators with the local maxima/minima of the integrated parallel electric along fieldlines coinciding with these separators. However, not all separators thread a reconnection site. Furthermore, there are different types of separator. Cluster separators are short arising within an individual weak magnetic field region and have negligible parallel electric field along them so are not associated with much reconnection. Intercluster separators connect a positive null point lying in one weak-field region to a negative null point that lies in a different weak-field region. Intercluster separators often thread enhanced regions of parallel electric field and are long. Since separators form the boundary between 4 globally-significant topologically-distinct domains, they are important sites of reconnection which can results in the global restructuring of the magnetic field. By considering the kinematic bifurcation models in which separators form it is possible to understand the formation of cluster and intercluster separators and explain their key properties.
description: 18 pages, 16 figures
DRalgo: a package for effective field theory approach for thermal phase transitions
Creators: name: Ekstedt, Andreas
name: Schicho, Philipp
name: Tenkanen, Tuomas V. I.
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: DRalgo is an algorithmic implementation that constructs an effective, dimensionally reduced, high-temperature field theory for generic models. The corresponding Mathematica package automatically performs the matching to next-to-leading order. This includes two-loop thermal corrections to scalar and Debye masses as well as one-loop thermal corrections to couplings. DRalgo also allows for integrating out additional heavy scalars. Along the way, the package provides leading-order beta functions for general gauge-charges and fermion-families; both in the fundamental and in the effective theory. Finally, the package computes the finite-temperature effective potential within the effective theory. The article explains the theory of the underlying algorithm while introducing the software on a pedagogical level.
description: 46 pages, 4 figures
Geometry and Energy of Non-abelian Vortices
Creators: name: Manton, Nicholas S.
name: Rink, Norman A.
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We study pure Yang--Mills theory on $Σ\times S^2$, where $Σ$ is a compact Riemann surface, and invariance is assumed under rotations of $S^2$. It is well known that the self-duality equations in this set-up reduce to vortex equations on $Σ$. If the Yang--Mills gauge group is $\SU{2}$, the Bogomolny vortex equations of the abelian Higgs model are obtained. For larger gauge groups one generally finds vortex equations involving several matrix-valued Higgs fields. Here we focus on Yang--Mills theory with gauge group $\SU{N}/\ZZ_N$ and a special reduction which yields only one non-abelian Higgs field. One of the new features of this reduction is the fact that while the instanton number of the theory in four dimensions is generally fractional with denominator $N$, we still obtain an integral vortex number in the reduced theory. We clarify the relation between these two topological charges at a bundle geometric level. Another striking feature is the emergence of non-trivial lower and upper bounds for the energy of the reduced theory on $Σ$. These bounds are proportional to the area of $Σ$. We give special solutions of the theory on $Σ$ by embedding solutions of the abelian Higgs model into the non-abelian theory, and we relate our work to the language of quiver bundles, which has recently proved fruitful in the study of dimensional reduction of Yang--Mills theory.
description: 22 pages, 1 figure
Tighter sum uncertainty relations via metric-adjusted skew information
Creators: name: Li, Hui
name: Gao, Ting
name: Yan, Fengli
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In this paper, we first provide three general norm inequalities, which are used to give new uncertainty relations of any finite observables and quantum channels via metric-adjusted skew information. The results are applicable to its special cases as Wigner-Yanase-Dyson skew information. In quantifying the uncertainty of channels, we discuss two types of lower bounds and compare the tightness between them, meanwhile, a tight lower bound is given. The uncertainty relations obtained by us are stronger than the existing ones. To illustrate our results, we give several specific examples.
description: 17 pages, 4 figures
VIDEOYOZUVLARDA QAYD QILINGAN TRANSPORT VOSITASINING HARAKATLANISH TEZLIGINI ANIQLASH ZAMONAVIY IMKONIYATLARI
Creators: name: Xudayberdiyev, Sharofjon Abduazizovich
name: G'abitov, Diyorbek Quvonch o'g'li
Publisher: name: Zenodo
Year: 2025

description: Videoyozuvlarda qayd qilingan jinoyatlarning hozirgi vaqtdajinoyatchilikka qarshi kurashish borasidagi samaradorligini baholash. Transportsohasida jinoyatlarning ko'rsatkichlari, va ularning tahlili, oldingi va hozirgi davrdatransport sohasidagi jinoyatlarga qarshi kurashishdagi o'zaro farq mulohazayuritish. Videoregistrator orqali yo'l transport sohasining tartibga solinishi vazamonaviy imkoniyatlarini yoritib berish.
title: Allenby, Edmund Henry Hynman Allenby, Viscount
title: Allenby, Edmund Henry Hynman Allenby, Viscount
Creators: name: Kitchen, James E.
Publisher: name: BSB - Bavarian State Library
Year: 2020
Subjects: subject: Allenby, Edmund Henry Hynman
subject: Allenby, Edmund Henry Hynman Allenby, Viscount, 1861-1936

description: Field Marshal Edmund Allenby was a British army officer who commanded a variety of formations on the Western Front, including the Third Army (October 1915 - June 1917) and the Egyptian Expeditionary Force in Palestine from June 1917 until the end of the First World War.
description: 1914-1918-Online International Encyclopedia of the First World War
description: 1914-1918-Online International Encyclopedia of the First World War
Slim: interoperable slide microscopy viewer and annotation tool for imaging data science and computational pathology
Creators: name: Gorman, Chris
name: Punzo, Davide
name: Octaviano, Igor
name: Pieper, Steve
name: Longabaugh, William J. R.
name: Clunie, David A.
name: Kikinis, Ron
name: Fedorov, Andrey Y.
name: Herrmann, Markus D.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantitative Methods (q-bio.QM)
subject: FOS: Biological sciences

description: The exchange of large and complex slide microscopy imaging data in biomedical research and pathology practice is impeded by a lack of data standardization and interoperability, which is detrimental to the reproducibility of scientific findings and clinical integration of technological innovations. Slim is an open-source, web-based slide microscopy viewer that implements the internationally accepted Digital Imaging and Communications in Medicine (DICOM) standard to achieve interoperability with a multitude of existing medical imaging systems. We showcase the capabilities of Slim as the slide microscopy viewer of the NCI Imaging Data Commons and demonstrate how the viewer enables interactive visualization of traditional brightfield microscopy and highly-multiplexed immunofluorescence microscopy images from The Cancer Genome Atlas and Human Tissue Atlas Network, respectively, using standard DICOMweb services. We further show how Slim enables the collection of standardized image annotations for the development or validation of machine learning models and the visual interpretation of model inference results in the form of segmentation masks, spatial heat maps, or image-derived measurements.
Accuracy of transfer matrix approaches for solving the effective mass Schrödinger equation
Creators: name: Jirauschek, Christian
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Computational Physics (physics.comp-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The accuracy of different transfer matrix approaches, widely used to solve the stationary effective mass Schrödinger equation for arbitrary one-dimensional potentials, is investigated analytically and numerically. Both the case of a constant and a position dependent effective mass are considered. Comparisons with a finite difference method are also performed. Based on analytical model potentials as well as self-consistent Schrödinger-Poisson simulations of a heterostructure device, it is shown that a symmetrized transfer matrix approach yields a similar accuracy as the Airy function method at a significantly reduced numerical cost, moreover avoiding the numerical problems associated with Airy functions.
Additional file 9 of Gene regulation network analyses of pistil development in papaya
Creators: name: Liao, Zhenyang
name: Dong, Fei
name: Liu, Juan
name: Xu, Lele
name: Marshall-Colon, Amy
name: Ming, Ray
Publisher: name: figshare
Year: 2022
Subjects: subject: Genetics
subject: FOS: Biological sciences
subject: Plant Biology

description: Additional file 9. Diagram of gene regulation network in meiosis stage (S2-3), red triangles represent transcription factors, blue circles represent other genes. The black line represents the regulatory relationship. a, Female sample. b, Male sample.
title: Armenian Patriarchate of Constantinople
title: Armenian Patriarchate of Constantinople
Creators: name: Maksudyan, Nazan
Publisher: name: BSB - Bavarian State Library
Year: 2020
Subjects: subject: Osmanisches Reich
subject: Armenier
subject: Zaven [Armenisches Patriarchat von Konstantinopel, Patriarch]
subject: Zawēn, Armenian Patriarch of Constantinople, 1868-
subject: Turkey--History--Ottoman Empire, 1288-1918

description: This article focuses on the function of the Armenian Patriarchate of Istanbul during World War I and the activities of Patriarch Zaven I Der Yeghiayan, whose term as patriarch coincided not only with the First World War, but also with the demise of the Ottoman Armenians.
description: 1914-1918-Online International Encyclopedia of the First World War
description: 1914-1918-Online International Encyclopedia of the First World War
Microscopic analysis of spin-momentum locking on a geometric phase metasurface
Creators: name: Lorén, Fernando
name: Paravicini-Bagliani, Gian L.
name: Saha, Sudipta
name: Gautier, Jérôme
name: Li, Minghao
name: Genet, Cyriaque
name: Martín-Moreno, Luis
Publisher: name: arXiv
Year: 2022
Subjects: subject: Optics (physics.optics)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We revisit spin-orbit coupling in a plasmonic Berry metasurface comprised of rotated nanoapertures, which is known to imprint a robust far-field polarization response. We present a scattering formalism that shows how that spin-momentum locking emerges from the geometry of the unit cell without requiring global rotation symmetries. We find and confirm with Mueller polarimetry measurements that spin-momentum locking is an approximate symmetry. The symmetry breakdown is ascribed to the elliptical projection of circularly polarized light into the planar surface. This breakdown is maximal when surface waves are excited, and a new set of spin-momentum locking rules is presented for this case.
description: 6 pages and 3 figures. 1 Supplemental material with 15 pages and 6 figures
Kadanoff-Baym approach to time-dependent quantum transport in AC and DC fields
Creators: name: Myöhänen, Petri
name: Stan, Adrian
name: Stefanucci, Gianluca
name: van Leeuwen, Robert
Publisher: name: arXiv
Year: 2010
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We have developed a method based on the embedded Kadanoff-Baym equations to study the time evolution of open and inhomogeneous systems. The equation of motion for the Green's function on the Keldysh contour is solved using different conserving many-body approximations for the self-energy. Our formulation incorporates basic conservation laws, such as particle conservation, and includes both initial correlations and initial embedding effects, without restrictions on the time-dependence of the external driving field. We present results for the time-dependent density, current and dipole moment for a correlated tight binding chain connected to one-dimensional non-interacting leads exposed to DC and AC biases of various forms. We find that the self-consistent 2B and GW approximations are in extremely good agreement with each other at all times, for the long-range interactions that we consider. In the DC case we show that the oscillations in the transients can be understood from interchain and lead-chain transitions in the system and find that the dominant frequency corresponds to the HOMO-LUMO transition of the central wire. For AC biases with odd inversion symmetry odd harmonics to high harmonic order in the driving frequency are observed in the dipole moment, whereas for asymmetric applied bias also even harmonics have considerable intensity. In both cases we find that the HOMO-LUMO transition strongly mixes with the harmonics leading to harmonic peaks with enhanced intensity at the HOMO-LUMO transition energy.
description: 16 pages, 9 figures. Submitted at "Progress in Nonequilibrium Green's Functions IV" conference
Particle Entity in the Doi-Peliti and Response Field Formalisms
Creators: name: Bothe, Marius
name: Cocconi, Luca
name: Zhen, Zigan
name: Pruessner, Gunnar
Publisher: name: arXiv
Year: 2022
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We introduce a procedure to test a theory for point particle entity, that is, whether said theory takes into account the discrete nature of the constituents of the system. We then identify the mechanism whereby particle entity is enforced in the context of two field-theoretic frameworks designed to incorporate the particle nature of the degrees of freedom, namely the Doi-Peliti field theory and the response field theory that derives from Dean's equation. While the Doi-Peliti field theory encodes the particle nature at a very fundamental level that is easily revealed, demonstrating the same for Dean's equation is more involved and results in a number of surprising diagrammatic identities. We derive those and discuss their implications. These results are particularly pertinent in the context of active matter, whose surprising and often counterintuitive phenomenology rests wholly on the particle nature of the agents and their degrees of freedom as particles.
Variational Quantum Eigensolver Ansatz for the $J_1$-$J_2$-model
Creators: name: Feulner, Verena
name: Hartmann, Michael J.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The ground state properties of the two-dimensional $J_1-J_2$-model are very challenging to analyze via classical numerical methods due to the high level of frustration. This makes the model a promising candidate where quantum computers could be helpful and possibly explore regimes that classical computers cannot reach. The $J_1-J_2$-model is a quantum spin model composed of Heisenberg interactions along the rectangular lattice edges and along diagonal edges between next-nearest neighbor spins. We propose an ansatz for the Variational Quantum Eigensolver (VQE) to approximate the ground state of an antiferromagnetic $J_1-J_2$-Hamiltonian for different lattice sizes and different ratios of $J_1$ and $J_2$. Moreover, we demonstrate that this ansatz can work without the need for gates along the diagonal next-nearest neighbor interactions. This simplification is of great importance for solid state based hardware with qubits on a rectangular grid, where it eliminates the need for SWAP gates. In addition, we provide an extrapolation for the number of gates and parameters needed for larger lattice sizes, showing that these are expected to grow less than quadratically in the qubit number up to lattice sizes which eventually can no longer be treated with classical computers.
description: 10 pages, 12 figures
On the speed of approach to equilibrium for a collisionless gas
Creators: name: Aoki, Kazuo
name: Golse, François
Publisher: name: arXiv
Year: 2010
Subjects: subject: Analysis of PDEs (math.AP)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 82C40 (35F10, 35B40)

description: We investigate the speed of approach to Maxwellian equilibrium for a collisionless gas enclosed in a vessel whose wall are kept at a uniform, constant temperature, assuming diffuse reflection of gas molecules on the vessel wall. We establish lower bounds for potential decay rates assuming uniform $L^p$ bounds on the initial distribution function. We also obtain a decay estimate in the spherically symmetric case. We discuss with particular care the influence of low-speed particles on thermalization by the wall.
description: 22 pages, 1 figure; submitted to Kinetic and Related Models
Challenges and Opportunities for Emerging Groundwater Markets (PowerPoint)
Creators: name: Brozović, Nick
Publisher: name: Unknown
Year: 2014
Subjects: Demand and Price Analysis
Land Economics/Use
Resource /Energy Economics and Policy

description: Summary: • Stream depletion is the primary driver of changes in groundwater management • Binding pumping constraints with monitoring and enforcement are feasible • Nascent groundwater trading systems exist worldwide • Trading systems offer increased profits to producers and resource conservation benefits • There is mismatch between current economic research on groundwater management and applied needs
description: USDA Economists Group Seminar / 28 January 2014
Gas Streaming Motions towards the Nucleus of M81
Creators: name: Müller, Allan Schnorr
name: Storchi-Bergmann, Thaisa
name: Riffel, Rogemar A.
name: Ferrari, Fabricio
name: Steiner, J. E.
name: Axon, David J.
name: Robinson, Andrew
Publisher: name: arXiv
Year: 2010
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present stellar and gaseous kinematics of the inner 120x250pc^2 of the Liner/Seyfert 1 galaxy M81, from optical spectra obtained with the GMOS integral field spectrograph on the Gemini North telescope at a spatial resolution of 10pc. The stellar velocity field shows circular rotation but deviations are observed close to the minor axis which can be attributed to stellar motions possibly associated to a nuclear bar. The stellar velocity dispersion of the bulge is 162km/s leading to a black hole mass of M_BH=5.5x10^7M_sun based on the M_BH-sigma relationship. The gas kinematics is dominated by non-circular motions and the subtraction of the stellar velocity field reveals blueshifts of ~-100km/s on the far side of the galaxy and a few redshifts on the near side. These characteristics can be interpreted in terms of streaming towards the center if the gas is in the plane. On the basis of the observed velocities and geometry of the flow, we estimate a mass inflow rate in ionized gas of ~4.0x10^-3M_sun/year, which is of the order of the accretion rate necessary to power the LINER nucleus of M81. We have also applied the technique of Principal Component Analysis (PCA) to our data, which reveals the presence of a rotating nuclear gas disk within ~50pc from the nucleus and a compact outflow, approximately perpendicular to the disk. The PCA combined with the observed gas velocity field shows that the nuclear disk is being fed by gas circulating in the galaxy plane. The presence of the outflow is supported by a compact jet seen in radio observations at a similar orientation, as well as by an enhancement of the [OI]\Halpha line ratio, probably resulting from shock excitation of the circumnuclear gas by the radio jet. With these observations we are thus resolving both the feeding -- via the nuclear disk and observed gas inflow, and the feedback -- via the outflow, around the nucleus of M81.
description: Accepted by MNRAS; 14 pages; 13 figures
Noise-driven bifurcations in a nonlinear Fokker-Planck system describing stochastic neural fields
Creators: name: Carrillo, José A.
name: Roux, Pierre
name: Solem, Susanne
Publisher: name: arXiv
Year: 2022
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: The existence and characterisation of noise-driven bifurcations from the spatially homogeneous stationary states of a nonlinear, non-local Fokker--Planck type partial differential equation describing stochastic neural fields is established. The resulting theory is extended to a system of partial differential equations modelling noisy grid cells. It is shown that as the noise level decreases, multiple bifurcations from the homogeneous steady state occur. Furthermore, the shape of the branches at a bifurcation point is characterised locally. The theory is supported by a set of numerical illustrations of the condition leading to bifurcations, the patterns along the corresponding local bifurcation branches, and the stability of the homogeneous state and the most prevalent pattern: the hexagonal one.
description: Includes EBT. 43 pages, 5 figures
Effects of Neutral Hydrogen on Cosmic Ray Precursors in Supernova Remnant Shock Waves
Creators: name: Raymond, John C.
name: Vink, J.
name: Helder, E. A.
name: de Laat, A.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Many fast supernova remnant shocks show spectra dominated by Balmer lines. The H$α$ profiles have a narrow component explained by direct excitations and a thermally Doppler broadened component due to atoms that undergo charge exchange in the post-shock region. However, the standard model does not take into account the cosmic-ray shock precursor, which compresses and accelerates plasma ahead of the shock. In strong precursors with sufficiently high densities, the processes of charge exchange, excitation and ionization will affect the widths of both narrow and broad line components. Moreover, the difference in velocity between the neutrals and the precursor plasma gives rise to frictional heating due to charge exchange and ionization in the precursor. In extreme cases, all neutrals can be ionized by the precursor. In this paper we compute the ion and electron heating for a wide range of shock parameters, along with the velocity distribution of the neutrals that reach the shock. Our calculations predict very large narrow component widths for some shocks with efficient acceleration, along with changes in the broad- to-narrow intensity ratio used as a diagnostic for the electron-ion temperature ratio. Balmer lines may therefore provide a unique diagnostic of precursor properties. We show that heating by neutrals in the precursor can account for the observed H$α$ narrow component widths, and that the acceleration efficiency is modest in most Balmer line shocks observed thus far.
description: 9 pages, 3 figures
helyOS: A customized off-the-shelf solution for autonomous driving applications in delimited areas
Creators: name: Barbosa, Carlos Viol
name: Belov, Nikolay
name: Keppler, Felix
name: Kolb, Julius
name: Nitzsche, Gunter
name: Wagner, Sebastian
Publisher: name: arXiv
Year: 2022
Subjects: subject: Software Engineering (cs.SE)
subject: Multiagent Systems (cs.MA)
subject: Systems and Control (eess.SY)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Microservice Architectures (MSA), known to successfully handle complex software systems, are emerging as the new paradigm for automotive software. The design of an MSA requires correct subdivision of the software system and implementation of the communication between components. These tasks demand both software expertise and domain knowledge. In this context, we developed an MSA framework pre-tailored to meet the requirements of autonomous driving applications in delimited areas - the helyOS framework. The framework decomposes complex applications in predefined microservice domains and provides a communication backbone for event messages and data. This paper demonstrates how such a tailored MSA framework can accelerate the development by prompting a quick start for the integration of motion planning algorithms, device controllers, vehicles simulators and web-browser interfaces.