cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Visible, invisible and trapped ghosts as sources of wormholes and black universes
Creators: name: Bolokhov, S. V.
name: Bronnikov, K. A.
name: Korolyov, P. A.
name: Skvortsova, M. V.
Publisher: name: arXiv
Year: 2015
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We construct explicit examples of globally regular static, spherically symmetric solutions in general relativity with scalar and electromagnetic fields, describing traversable wormholes with flat and AdS asymptotics and regular black holes, in particular, black universes. (A black universe is a regular black hole with an expanding, asymptotically isotropic space-time beyond the horizon.) Such objects exist in the presence of scalar fields with negative kinetic energy ("phantoms", or "ghosts"), which are not observed under usual physical conditions. To account for that, we consider what we call "trapped ghosts" (scalars whose kinetic energy is only negative in a strong-field region of space-time) and "invisible ghosts", i.e., phantom scalar fields sufficiently rapidly decaying in the weak-field region. The resulting configurations contain different numbers of Killing horizons, from zero to four.
description: 4 pages, 1 figure. Submitted to Proceedings of the International Conference on Particle Physics and Astrophysics (ICPPA 2015), October 5-10, 2015, Moscow, Russia
title: Overstromingen juli 2021: analyse van een hypothetische gelijkaardige gebeurtenis in Vlaanderen
Creators: name: Pereira, F.
name: Nossent, J.
Publisher: name: Flanders Hydraulics Research
Year: 2022

description: Title : WL Rapporten. Waterbouwkundig Laboratorium: Antwerpen. Volume : 21_094_1 Issue : Pagination : VI, 30
Significant crosstalk reduction using all-dielectric CMOS-compatible metamaterials
Creators: name: Khavasi, Amin
name: Chrostowski, Lukas
name: Lu, Zeqin
name: Bojko, Richard
Publisher: name: arXiv
Year: 2016
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: A recent computational result suggests that highly confined modes can be realized by all-dielectric metamaterials (S. Jahani et. al., Optica 1, 96 (2014)). This substantially decreases crosstalk between dielectric waveguides, paving the way for high-density photonic circuits. Here, we experimentally demonstrate, on a standard silicon-on-insulator (SOI) platform, that using a simple metamaterial between two silicon strip waveguides results in about a 10-fold increase in coupling length. The proposed structure may lead to significant reduction in the size of devices in silicon photonics.
On Minimizing Crossings in Storyline Visualizations
Creators: name: Kostitsyna, Irina
name: Nöllenburg, Martin
name: Polishchuk, Valentin
name: Schulz, André
name: Strash, Darren
Publisher: name: arXiv
Year: 2015
Subjects: subject: Data Structures and Algorithms (cs.DS)
subject: Computational Geometry (cs.CG)
subject: FOS: Computer and information sciences
subject: F.2.2; G.2.2

description: In a storyline visualization, we visualize a collection of interacting characters (e.g., in a movie, play, etc.) by $x$-monotone curves that converge for each interaction, and diverge otherwise. Given a storyline with $n$ characters, we show tight lower and upper bounds on the number of crossings required in any storyline visualization for a restricted case. In particular, we show that if (1) each meeting consists of exactly two characters and (2) the meetings can be modeled as a tree, then we can always find a storyline visualization with $O(n\log n)$ crossings. Furthermore, we show that there exist storylines in this restricted case that require $Ω(n\log n)$ crossings. Lastly, we show that, in the general case, minimizing the number of crossings in a storyline visualization is fixed-parameter tractable, when parameterized on the number of characters $k$. Our algorithm runs in time $O(k!^2k\log k + k!^2m)$, where $m$ is the number of meetings.
description: 6 pages, 4 figures. To appear at the 23rd International Symposium on Graph Drawing and Network Visualization (GD 2015)
Proactive Demand Response for Data Centers: A Win-Win Solution
Creators: name: Wang, Hao
name: Huang, Jianwei
name: Lin, Xiaojun
name: Mohsenian-Rad, Hamed
Publisher: name: arXiv
Year: 2015
Subjects: subject: Systems and Control (eess.SY)
subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: In order to reduce the energy cost of data centers, recent studies suggest distributing computation workload among multiple geographically dispersed data centers, by exploiting the electricity price difference. However, the impact of data center load redistribution on the power grid is not well understood yet. This paper takes the first step towards tackling this important issue, by studying how the power grid can take advantage of the data centers' load distribution proactively for the purpose of power load balancing. We model the interactions between power grid and data centers as a two-stage problem, where the utility company chooses proper pricing mechanisms to balance the electric power load in the first stage, and the data centers seek to minimize their total energy cost by responding to the prices in the second stage. We show that the two-stage problem is a bilevel quadratic program, which is NP-hard and cannot be solved using standard convex optimization techniques. We introduce benchmark problems to derive upper and lower bounds for the solution of the two-stage problem. We further propose a branch and bound algorithm to attain the globally optimal solution, and propose a heuristic algorithm with low computational complexity to obtain an alternative close-to-optimal solution. We also study the impact of background load prediction error using the theoretical framework of robust optimization. The simulation results demonstrate that our proposed scheme can not only improve the power grid reliability but also reduce the energy cost of data centers.
Model Selection and Multiple Testing - A Bayesian and Empirical Bayes Overview and some New Results
Creators: name: Dutta, Ritabrata
name: Bogdan, Malgortaza
name: Ghosh, Jayanta K.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Statistics Theory (math.ST)
subject: FOS: Mathematics

description: We provide a brief overview of both Bayes and classical model selection. We argue tentatively that model selection has at least two major goals, that of finding the correct model or predicting well, and that in general both these goals may not be achieved in an optimum manner by a single model selection rule. We discuss, briefly but critically, through a study of well-known model selection rules like AIC, BIC, DIC and Lasso, how these different goals are pursued in each paradigm. We introduce some new definitions of consistency, results and conjectures about consistency in high dimensional model selection problems. Finally we discuss some new or recent results in Full Bayes and Empirical Bayes multiple testing, and cross-validation. We show that when the number of parameters tends to infinity at a smaller rate than sample size, then it is best from the point of view of consistency to use most of the data for inference and only a negligible proportion to make an improper prior proper.
description: 29 pages
Order-disorder transition in repulsive self-propelled particle systems
Creators: name: Hiraoka, Takayuki
name: Shimada, Takashi
name: Ito, Nobuyasu
Publisher: name: arXiv
Year: 2016
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We study the collective dynamics of repulsive self-propelled particles. The particles are governed by coupled equations of motion that include polar self-propulsion, damping of velocity and of polarity, repulsive particle-particle interaction, and deterministic dynamics. Particle dynamics simulations show that the collective coherent motion with large density fluctuations spontaneously emerges from a disordered, isotropic state. In the parameter region where the rotational damping of polarity is strong, the systems undergoes an abrupt shift to the absorbing ordered state after a waiting period in the metastable disordered state. In order to obtain a simple understanding of the mechanism underlying the collective behavior, we analyze binary particle scattering process. We show that this approach correctly predicts the order-disorder transition at dilute limit. The same approach is expanded for finite densities, although it disagrees with the result from many-particle simulations due to many-body correlations and density fluctuations.
Extraordinary wavelength reduction in terahertz graphene-cladded photonic crystal slabs
Creators: name: Williamson, Ian A. D.
name: Mousavi, S. Hossein
name: Wang, Zheng
Publisher: name: arXiv
Year: 2015
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Photonic crystal slabs have been widely used in nanophotonics for light confinement, dispersion engineering, nonlinearity enhancement, and other unusual effects arising from their structural periodicity. Sub-micron device sizes and mode volumes are routine for silicon-based photonic crystal slabs, however spectrally they are limited to operate in the near infrared. Here, we show that two single-layer graphene sheets allow silicon photonic crystal slabs with submicron periodicity to operate in the terahertz regime, with an extreme 100x wavelength reduction and excellent out-of-plane confinement. The graphene-cladded photonic crystal slabs exhibit band structures closely resembling those of ideal two-dimensional photonic crystals, with broad two-dimensional photonic band gaps even when the slab thickness approaches zero. The overall photonic band structure not only scales with the graphene Fermi level, but more importantly scales to lower frequencies with reduced slab thickness. Just like ideal 2D photonic crystals, graphene-cladded photonic crystal slabs confine light along line defects, forming waveguides with the propagation lengths on the order of tens of lattice constants. The proposed structure opens up the possibility to dramatically reduce the size of terahertz photonic systems by orders of magnitude.
The Subaru COSMOS 20: Subaru Optical Imaging of the HST COSMOS Field with 20 Filters
Creators: name: Taniguchi, Y.
name: Kajisawa, M.
name: Kobayashi, M. A. R.
name: Shioya, Y.
name: Nagao, T.
name: Capak, P.
name: Aussel, H.
name: Ichikawa, A.
name: Murayama, T.
name: Scoville, N.
name: Ilbert, O.
name: Salvato, M.
name: Sanders, D. B.
name: Mobasher, B.
name: Miyazaki, S.
name: Komiyama, Y.
name: Fevre, O. Le
name: Tasca, L.
name: Lilly, S.
name: Carollo, M.
name: Renzini, A.
name: Rich, M.
name: Schinnerer, E.
name: Kaifu, N.
name: Karoji, H.
name: Arimoto, N.
name: Okamura, S.
name: Ohta, K.
name: Shimasaku, K.
name: Hayashino, T.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present both the observations and the data reduction procedures of the Subaru COSMOS 20 project that is an optical imaging survey of the HST COSMOS field, carried out by using Suprime-Cam on the Subaru Telescope with the following 20 optical filters: 6 broad-band (B, g', V, r', i', and z'), 2 narrow-band (NB711 and NB816), and 12 intermediate-band filters (IA427, IA464, IA484, IA505, IA527, IA574, IA624, IA679, IA709, IA738, IA767, and IA827). A part of this project is described in Taniguchi et al. (2007) and Capak et al. (2007) for the six broad-band and one narrow-band (NB816) filter data. In this paper, we present details of the observations and data reduction for remaining 13 filters (the 12 IA filters and NB711). In particular, we describe the accuracy of both photometry and astrometry in all the filter bands. We also present optical properties of the Suprime-Cam IA filter system in Appendix.
description: 15 pages, 8 figures, 7 tables; accepted for publication in PASJ on October 2, 2015
Distance measures and evolution of polymer chains in their topological space
Creators: name: Mashaghi, Alireza
name: Ramezanpour, Abolfazl
Publisher: name: arXiv
Year: 2015
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Conformational transitions are ubiquitous in biomolecular systems, have significant functional roles and are subject to evolutionary pressures. Here we provide a first theoretical framework for topological transition, i.e. conformational transitions that are associated with changes in molecular topology. For folded linear biomolecules, arrangement of intramolecular contacts is identified as a key topological property, termed as circuit topology. Distance measures are proposed as reaction coordinates to represent progress along a pathway from initial topology to final topology. Certain topological classes are shown to be more accessible from a random topology. We study dynamic stability and pathway degeneracy associated with a topological reaction and found that off-pathways might seriously hamper evolution to desired topologies. Finally we present an algorithm for estimating the number of intermediate topologies visited during a topological reaction. The results of this study are relevant to, among others, structural studies of RNA and proteins, analysis of topologically associated domains in chromosomes, and molecular evolution.
description: 21 pages, 7 figures, 4 appendixes
Lattice Point Counting in Sectors of Hyperbolic 3-space
Creators: name: Laaksonen, Niko
Publisher: name: arXiv
Year: 2015
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11F72 (Primary), 11N36 (Secondary)

description: Let $Γ$ be a cocompact discrete subgroup of $\mathrm{PSL}_{2}(\mathbb{C})$ and denote by $\mathcal{H}$ the three dimensional upper half-space. For a $p\in\mathcal{H}$, we count the number of points in the orbit $Γp$, according to their distance, $\operatorname{arccosh} X$, from a totally geodesic hyperplane. The main term in $n$ dimensions was obtained by Herrmann for any subset of a totally geodesic submanifold. We prove a pointwise error term of $O(X^{3/2})$ by extending the method of Huber and Chatzakos-Petridis to three dimensions. By applying Chamizo's large sieve inequalities we obtain the conjectured error term $O(X^{1+ε})$ on average in the spatial aspect. We prove a corresponding large sieve inequality for the radial average and explain why it only improves on the pointwise bound by $1/6$.
description: 23 pages, 2 figures
Tomography is necessary for universal entanglement detection with single-copy observables
Creators: name: Lu, Dawei
name: Xin, Tao
name: Yu, Nengkun
name: Ji, Zhengfeng
name: Chen, Jianxin
name: Long, Guilu
name: Baugh, Jonathan
name: Peng, Xinhua
name: Zeng, Bei
name: Laflamme, Raymond
Publisher: name: arXiv
Year: 2015
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Entanglement, one of the central mysteries of quantum mechanics, plays an essential role in numerous applications of quantum information theory. A natural question of both theoretical and experimental importance is whether universal entanglement detection is possible without full state tomography. In this work, we prove a no-go theorem that rules out this possibility for any non-adaptive schemes that employ single-copy measurements only. We also examine in detail a previously implemented experiment, which claimed to detect entanglement of two-qubit states via adaptive single-copy measurements without full state tomography. By performing the experiment and analyzing the data, we demonstrate that the information gathered is indeed sufficient to reconstruct the state. These results reveal a fundamental limit for single-copy measurements in entanglement detection, and provides a general framework to study the detection of other interesting properties of quantum states, such as the positivity of partial transpose and the $k$-symmetric extendibility.
description: 10 pages, 7 figures, plus 5 pages of supplementary information
Tutorial: Opto-mechanical cooling by the back-action of cavity photons
Creators: name: Mansuripur, Masud
Publisher: name: arXiv
Year: 2015
Subjects: subject: Optics (physics.optics)
subject: Classical Physics (physics.class-ph)
subject: FOS: Physical sciences

description: We present a simple classical analysis of light interacting with a Fabry-Perot cavity consisting of a fixed (dielectric) front mirror and a vibrating rear mirror. In the adiabatic approximation, the returning light exhibits sideband symmetry, which will go away once the photon lifetime becomes comparable to or longer than the oscillation period of the rear mirror. When the oscillation period is short compared to the cavity photon lifetime, one must approach the problem differently, treating the vibrating mirror as a scatterer which sends a fraction of the incident light into sideband frequencies. With proper detuning, the cavity's internal radiation pressure could either dampen or amplify the vibrations of the mirror; the former is the physical principle behind opto-mechanical cooling by the back-action of cavity photons.
description: 7 pages, 1 figure, 23 equations, 24 references
title: Structural characterisation of a novel E3 ligase module and activity-based probe development for UBL E3 ligases
titleType: Other
Creators: name: Barnsby-Greer, Lu
Publisher: name: University of Dundee
Year: 2022

description: E3 ligase enzymes are key regulators of many aspects of eukaryotic biology via the promotion of the ubiquitylation and subsequent degradation of proteins. There have been over 700 E3s identified within the ubiquitin system with diverse mechanisms of E3 ligase activity, however, significantly less have been identified for ubiquitin-like proteins. Recently developed activity-based probes allowed for the identification of novel E3 ligase proteins involved in the ubiquitin system that carry out unconventional ubiquitylation. The development of UBL activity-based probes has the potential to identify novel E3 ligases in these systems via proteomic analysis.

To date, seven UBR (ubiquitin ligase N-recognin) family E3s (UBR1-UBR7) have been identified with all members apart from UBR4 shown to contain an established catalytic E3 module. Using recently developed activity-based probes I identified a region within the large E3 ligase UBR4 responsible for its ability to function as an E3 ligase. The crystal structures identified a novel protein fold named the ‘hemi-RING’ which resembles half of a canonical RING domain, coordinating a single zinc ion responsible for E3 ligase activity. Subsequent work is required to further investigate the presence of a potential catalytic cysteine residue within UBR4 and to further understand UBR4’s mechanism of function.
Production of Quarkonia at RHIC
Creators: name: Vertesi, Robert
Publisher: name: arXiv
Year: 2015
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: The production of different quarkonium states provides unique insight to the hot and cold nuclear matter effects in the strongly interacting medium that is formed in high energy heavy ion collisions. While LHC explores the energy frontier, RHIC has a broad physics program to explore the nuclear modification at different energies in a wide range of systems. Some of the most interesting recent results on $J/ψ$ and $Υ$ production in p+p, d+Au and A+A collisions from PHENIX and STAR are summarized in this work.
description: Writeup of the talk on the "Joint Wigner-CCNU High-Energy Heavy-Ion Balaton Workshop 2015", Tihany, Hungary. To be published in the Gribov 85 memorial issue "Exploring Quantum Field Theory". 8 pages, 8 figures
Parallel Ordered Sets Using Join
Creators: name: Blelloch, Guy
name: Ferizovic, Daniel
name: Sun, Yihan
Publisher: name: arXiv
Year: 2016
Subjects: subject: Data Structures and Algorithms (cs.DS)
subject: FOS: Computer and information sciences

description: The ordered set is one of the most important data type in both theoretical algorithm design and analysis and practical programming. In this paper we study the set operations on two ordered sets, including Union, Intersect and Difference, based on four types of balanced Binary Search Trees (BST) including AVL trees, red-black trees, weight balanced trees and treaps. We introduced only one subroutine Join that needs to be implemented differently for each balanced BST, and on top of which we can implement generic, simple and efficient parallel functions for ordered sets. We first prove the work-efficiency of these Join-based set functions using a generic proof working for all the four types of balanced BSTs. We also implemented and tested our algorithm on all the four balancing schemes. Interestingly the implementations on all four data structures and three set functions perform similarly in time and speedup (more than 45x on 64 cores). We also compare the performance of our implementation to other existing libraries and algorithms.
The Indo-French TRISHNA satellite mission High resolution and high revisit surface temperature for land and coastal ocean
Creators: name: Gamet, Philippe
name: Marcq, Sebastien
name: Autret, Emmanuelle
Publisher: name: Zenodo
Year: 2023

description: GHRSST talk 19 January 2023 More information: https://www.ghrsst.org/meetings/19-january-2023-philippe-gamet-on-the-indo-french-trishna-satellite-mission/ About this talk and the speakers The Indo-French TRISHNA satellite mission: high resolution and high revisit surface temperature for land and coastal ocean The TRISHNA mission (Thermal infraRed Imaging Satellite for High-resolution Natural resource Assessment) is a cooperation between the French (CNES) and Indian (ISRO) space agencies, for a satellite to be launched in 2025 for a 5-year lifetime, to measure approximately twice a week the visible, near infrared and thermal infrared signal of the surface-atmosphere system globally and at 60 m resolution for the continents and coastal ocean, with a resolution of 1000 meters over deep ocean. Level 2 products –free and open data policy- include Sea Surface Temperature, visible and near infrared surface reflectances as well as cloud mask, aerosol optical thickness and data quality flags. Design drivers of the mission: (i) monitoring of ecosystem stress and water use, focusing on agriculture and water content of vegetation, through evapotranspiration; and (ii) coastal and inland waters: characterization of the dynamics of the shallow bathymetry; monitoring of exchanges in estuaries and intertidal zones; sea surface temperatures and winds; sub-mesoscale activity in coastal areas and in the high seas; oil spills, thermal pollutants, effluents and wastewater discharges. Interactions are needed with the experts and future users: definition of monitored coastal areas and polar zones, algorithms for SST and optical surface variables computation, cloud mask, product content: variables, auxiliary and ancillary data. The synergy (orbits, products, algorithms, CAL/VAL) between TRISHNA and future operational high-resolution thermal infrared missions (Surface Biology and Geology (SBG, 2027) from NASA/JPL, Land Surface Temperature Monitoring (LSTM, 2029) from ESA) is also a key element of the preparation of TRISHNA.
Design and experimental demonstration of optomechanical paddle nanocavities
Creators: name: Healey, Chris
name: Kaviani, Hamidreza
name: Wu, Marcelo
name: Khanaliloo, Behzad
name: Mitchell, Matthew
name: Hryciw, Aaron C.
name: Barclay, Paul E.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We present the design, fabrication and initial characterization of a paddle nanocavity consisting of a suspended sub-picogram nanomechanical resonator optomechanically coupled to a photonic crystal nanocavity. The optical and mechanical properties of the paddle nanocavity can be systematically designed and optimized, and key characteristics including mechanical frequency easily tailored. Measurements under ambient conditions of a silicon paddle nanocavity demonstrate an optical mode with quality factor $Q_o$ ~ 6000 near 1550 nm, and optomechanical coupling to several mechanical resonances with frequencies $ω_m/2π$ ~ 12-64 MHz, effective masses $m_\text{eff}$ ~ 350-650 fg, and mechanical quality factors $Q_m$ ~ 44-327. Paddle nanocavities are promising for optomechanical sensing and nonlinear optomechanics experiments.
description: 5 pages, 4 figures
Decay of Determinantal and Pfaffian Correlation Functionals in One-dimensional Lattices
Creators: name: Sims, Robert
name: Warzel, Simone
Publisher: name: arXiv
Year: 2015
Subjects: subject: Mathematical Physics (math-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We establish bounds on the decay of time-dependent multipoint correlation functionals of one-dimensional quasi-free fermions in terms of the decay properties of their two-point function. At a technical level, this is done with the help of bounds on certain bordered determinants and pfaffians. These bounds, which we prove, go beyond the well-known Hadamard estimates. Our main application of these results is a proof of strong (exponential) dynamical localization of spin-correlation functions in disordered $XY$-spin chains.
Sachdev-Ye-Kitaev Model and Thermalization on the Boundary of Many-Body Localized Fermionic Symmetry Protected Topological States
Creators: name: You, Yi-Zhuang
name: Ludwig, Andreas W. W.
name: Xu, Cenke
Publisher: name: arXiv
Year: 2016
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: We consider the Sachdev-Ye-Kitaev (SYK) model as an effective theory arising at the zero-dimensional boundary of a many-body localized, Fermionic symmetry protected topological (SPT) phase in one spatial dimension. The Fermions at the boundary are always fully interacting. We find that the boundary is thermalized and investigate how its boundary anomaly, dictated by the bulk SPT order, is encoded in the quantum chaotic eigenspectrum of the SYK model. We show that depending on the SPT symmetry class, the boundary many-body level statistics cycle in a systematic manner through those of the three different Wigner-Dyson random matrix ensembles with a periodicity in the topological index that matches the interaction-reduced classification of the bulk SPT states. We consider all three symmetry classes BDI, AIII, and CII, whose SPT phases are classified in one spatial dimension by $\mathbb{Z}$ in the absence of interactions. For symmetry class BDI, we derive the eight-fold periodicity of the Wigner-Dyson statistics by using Clifford algebras.
description: 7 pages, 1 figure
The Phase Space of z~1.2 SpARCS Clusters: Using Herschel to probe Dust Temperature as a Function of Environment and Accretion History
Creators: name: Noble, A. G.
name: Webb, T. M. A.
name: Yee, H. K. C.
name: Muzzin, A.
name: Wilson, G.
name: van der Burg, R. F. J.
name: Balogh, M. L.
name: Shupe, D. L.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present a five-band Herschel study (100-500um) of three galaxy clusters at z~1.2 from the Spitzer Adaptation of the Red-Sequence Cluster Survey (SpARCS). With a sample of 120 spectroscopically-confirmed cluster members, we investigate the role of environment on galaxy properties utilizing the projected cluster phase space (line-of-sight velocity versus clustercentric radius), which probes the time-averaged galaxy density to which a galaxy has been exposed. We divide cluster galaxies into phase-space bins of (r/r200) x (v/sigma_v), tracing a sequence of accretion histories in phase space. Stacking optically star-forming cluster members on the Herschel maps, we measure average infrared star formation rates, and, for the first time in high-redshift galaxy clusters, dust temperatures for dynamically distinct galaxy populations---namely, recent infalls and those that were accreted onto the cluster at an earlier epoch. Proceeding from the infalling to virialized (central) regions of phase space, we find a steady decrease in the specific star formation rate and increase in the stellar age of star-forming cluster galaxies. We perform a probability analysis to investigate all acceptable infrared spectral energy distributions within the full parameter space and measure a ~4 sigma drop in the average dust temperature of cluster galaxies in an intermediate phase-space bin, compared to an otherwise flat trend with phase space. We suggest one plausible quenching mechanism which may be consistent with these trends, invoking ram-pressure stripping of the warmer dust for galaxies within this intermediate accretion phase.
description: 14 pages, 7 figures, 2 tables; accepted for publication in ApJ
title: Role of long acting bronchodilators in asthma and chronic obstructive pulmonary disease
titleType: Other
Creators: name: Jabbal, Sunny
Publisher: name: University of Dundee
Year: 2022

description: Long acting beta agonists (LABA) and long acting muscarinic receptor antagonists (LAMA) are both used in the treatment of obstructive airway disease, in asthma they are given with inhaled corticosteroids (ICS), in chronic obstructive pulmonary disease (COPD) they may be given with or without ICS. These therapies may attenuate the degree to which airways narrow to a bronchoconstrictor stimulus (airway hyperresponsiveness). Long acting bronchodilators may also change airway geometry as well as pure airway calibre, this can be measured by an effort independent breathing test called impulse oscillometry. The works within this thesis assess the effects of LABA and LABA with LAMA therapy on the airways of non-smoking people with asthma, people with asthma who smoke, and people with COPD. Primarily it focuses on outcomes related to impulse oscillometry measurements of airway resistance (R) and reactance (X), but also assesses how the bronchodilators attenuate airway hyperresponsiveness.

In mild-moderate persistent asthma, the addition of the LAMA tiotropium to ICS/LABA adds little to airway calibre or geometry. Neither does it significantly attenuate airway hyperresponsiveness. In the group of smokers with asthma, the addition of tiotropium to ICS/LABA does significantly reduce airway resistance and reactance, alongside asthma symptoms. In COPD tiotropium added to ICS/LABA reduces bronchoconstriction from non-selective beta-blocker therapy with carvedilol.

In summary add on LAMA to ICS/LABA has little benefit in mild-moderate asthma but may offer benefits in both people with asthma who smoke and those with COPD. This may be due to a different inflammatory or bronchoconstrictor stimulus in those patients.
Ab initio calculation of the electromagnetic and neutral-weak response functions of 4He and 12C
Creators: name: Lovato, A.
name: Benhar, O.
name: Carlson, J.
name: Gandolfi, S.
name: Pieper, Steven C.
name: Rocco, N.
name: Schiavilla, R.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Precise measurement of neutrino oscillations, and hence the determination of their masses demands a quantitative understanding of neutrino-nucleus interactions. To this aim, two-body meson-exchange currents have to be accounted for along within realistic models of nuclear dynamics. We summarize our progresses towards the construction of a consistent framework, based on quantum Monte Carlo methods and on the spectral function approach, that can be exploited to accurately describe neutrino interactions with atomic nuclei over the broad kinematical region covered by neutrino experiments.
description: 8 pages, 4 figure, Proceedings of the 21st International Conference on Few-Body Problems in Physics, Chicago, Illinois, USA
title: Электротехника и электроника. Электрический привод
title: Учебное пособие для СПО
titleType: Subtitle
Creators: name: Дементьев Ю.Н.
name:  Чернышев А.Ю.
name:  Чернышев И.А.
Publisher: name: Профобразование
Year: 2017

description: В пособии изложены основы теории электропривода. Рассматриваются принципы действия разомкнутых и замкнутых систем электроприводов постоянного и переменного тока. Представлена методика и примеры расчета параметров двигателей, статических и динамических характеристик электроприводов. Пособие предназначено для студентов, обучающихся по специальностям укрупненной группы «Электро- и теплоэнергетика», изучающим дисциплину «Электротехника и электроника».
description: The manual outlines the basics of the theory of the drive. Operation principles open and closed systems of electric drives of AC and DC. The methods and examples of calculation of the engine parameters, static and dynamic characteristics of electric drives. The textbook is intended for students enrolled in the specialties of the enlarged group "Electro - and heat power engineering", studying the discipline "Electrical and electronics".
title: Формирование активной гражданской позиции учащейся молодежи в учреждениях профессионального образования
title: Сборник методических материалов
titleType: Subtitle
Creators: name: Воробей Н.В.
name:  Гаврикова Д.Ю.
name:  Демидик И.Я.
name:  Жигунова Е.Ю.
name:  Иванова М.Ф.
name:  Кавцевич М.Г.
name:  Литовчик С.М.
name:  Пчельник Е.В.
name:  Пыжьянова Л.В.
name:  Тагаев С.М.
name:  Терновская Ж.В.
Publisher: name: Республиканский институт профессионального образования (РИПО)
Year: 2015

description: Сборник содержит теоретические и практические материалы из опыта работы учреждений профессионального образования по гражданско-патриотическому воспитанию учащейся молодежи, представленные на XV республиканской выставке научно-методической литературы и педагогического опыта «Я – грамадзянін Беларусі». Адресуется заместителям директоров по учебно-воспитательной (воспитательной) работе, а также всем, кто занимается вопросами гражданско-патриотического воспитания, формирования активной гражданской позиции учащейся молодежи.
description: The collection contains theoretical and practical materials from the experience of professional education establishments to the civil-Patriotic upbringing of young students, presented at the XV Republican exhibition of scientific and methodical literature and pedagogical experience "I – Ramazan Belarus". Meetings of the Deputy Directors on educational (educational) work and anyone who deals with issues of civil and Patriotic education, formation of active civil position of students.
THE ECONOMIC AND PRODUCTION-RELATED SITUATION OF POLISH AGRICULTURE OVER THE PERIOD FROM 2015-2021
Creators: name: MIKUŁA, ANETA
name: MAŚNIAK, JACEK
name: GRUZIEL, KINGA
name: MIKUŁA, ANETA
name: MAŚNIAK, JACEK
name: GRUZIEL, KINGA
Publisher: name: Unknown
Year: 2022
Subjects: subject: Agribusiness
subject: Agricultural and Food Policy
subject: agriculture
subject: production
subject: income
subject: COVID-19
subject: Poland

description: The aim of the study was to assess the economic and production-related situation of Polish agriculture during the COVID-19 pandemic. The analysis covered the years 2015-2021, i.e. in addition to the years of the pandemic’s occurrence in Poland (2020- 2021), the research period included 5 earlier years, in order to identify possible changes during the pandemic. In order to attain the objective, the data from the Economic Accounts for Agriculture – EAA, published by Eurostat, was used. A library query and secondary data from the Eurostat database were employed. Over the years 2015-2021, the value and quantity of agricultural production in Poland increased. In the first year of the pandemic, the value of production increased nominally by 13.7%, and by 8% in real terms. This growth mainly stemmed from the increase in the volume of plant production. The second year of the pandemic brought a slight decrease in the production volume – by 0.8%. It resulted primarily from yield deterioration. The time of the pandemic was characterized by considerable changes in agricultural income. Unfavourable price changes in 2021, related to a large increase in costs, caused the income from agriculture rise in the first year of the pandemic, but over the second year of COVID-19, the income situation deteriorated significantly. Worse farming conditions related mainly to an increase in the cost of loans and the prices of production means may have a significant impact on the food security of the Polish society.
The Dirac equation in the Kerr-de Sitter metric
Creators: name: Batic, D.
name: Morgan, K.
name: Nowakowski, M.
name: Medina, S. Bravo
Publisher: name: arXiv
Year: 2015
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We consider a fermion in the presence of a rotating black hole immersed in a universe with positive cosmological constant. After deriving new formulae for the event, Cauchy and cosmological horizons we adopt the Carter tetrad to separate the aforementioned equation into a radial and angular equation. We show how the Chandrasekhar ansatz leads to the construction of a symmetry operator that can be interpreted as the square root of the squared total angular momentum operator. Furthermore, we prove that the the spectrum of the angular operator is discrete and consists of simple eigenvalues and by means of the functional Bethe ansatz method we also derive a set of necessary and sufficient conditions for the angular operator to have polynomial solutions. Finally, we show that there exist no bound states for the Dirac equation in the non-extreme case.
description: 29 pages, 2 figures
Thermodynamics of Cosmic Defect Network Evolution
Creators: name: Avelino, P. P.
name: Sousa, L.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We show that simple thermodynamic conditions determine, to a great extent, the equation of state and dynamics of cosmic defects of arbitrary dimensionality. We use these conditions to provide a more direct derivation of the Velocity-dependent One-Scale (VOS) model for the macroscopic dynamics of topological defects of arbitrary dimensionality in a $N+1$-dimensional homogeneous and isotropic universe. We parameterize the modifications to the VOS model associated to the interaction of the topological defects with other fields, including, in particular, a new dynamical degree of freedom associated to the variation of the mass per unit $p$-area of the defects, and compute the corresponding scaling solutions. The observational impact of this new dynamical degree of freedom is also briefly discussed.
description: 9 pages, no figures
Nonlinear State Space Model Identification Using a Regularized Basis Function Expansion
Creators: name: Svensson, Andreas
name: Schön, Thomas B.
name: Solin, Arno
name: Särkkä, Simo
Publisher: name: arXiv
Year: 2015
Subjects: subject: Computation (stat.CO)
subject: Systems and Control (eess.SY)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: This paper is concerned with black-box identification of nonlinear state space models. By using a basis function expansion within the state space model, we obtain a flexible structure. The model is identified using an expectation maximization approach, where the states and the parameters are updated iteratively in such a way that a maximum likelihood estimate is obtained. We use recent particle methods with sound theoretical properties to infer the states, whereas the model parameters can be updated using closed-form expressions by exploiting the fact that our model is linear in the parameters. Not to over-fit the flexible model to the data, we also propose a regularization scheme without increasing the computational burden. Importantly, this opens up for systematic use of regularization in nonlinear state space models. We conclude by evaluating our proposed approach on one simulation example and two real-data problems.
description: Accepted to the 6th IEEE international workshop on computational advances in multi-sensor adaptive processing (CAMSAP), Cancun, Mexico, December 2015
Scaling of Harmonic Oscillator Eigenfunctions and Their Nodal Sets Around the Caustic
Creators: name: Hanin, Boris
name: Zelditch, Steve
name: Zhou, Peng
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mathematical Physics (math-ph)
subject: Probability (math.PR)
subject: Spectral Theory (math.SP)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We study the scaling asymptotics of the eigenspace projection kernels $Π_{\hbar, E}(x,y)$ of the isotropic Harmonic Oscillator $- \hbar ^2 Δ+ |x|^2$ of eigenvalue $E = \hbar(N + \frac{d}{2})$ in the semi-classical limit $\hbar \to 0$. The principal result is an explicit formula for the scaling asymptotics of $Π_{\hbar, E}(x,y)$ for $x,y$ in a $\hbar^{2/3}$ neighborhood of the caustic $\mathcal C_E$ as $\hbar \to 0.$ The scaling asymptotics are applied to the distribution of nodal sets of Gaussian random eigenfunctions around the caustic as $\hbar \to 0$. In previous work we proved that the density of zeros of Gaussian random eigenfunctions of $\hat{H}_{\hbar}$ have different orders in the Planck constant $\hbar$ in the allowed and forbidden regions: In the allowed region the density is of order $\hbar^{-1}$ while it is $\hbar^{-1/2}$ in the forbidden region. Our main result on nodal sets is that the density of zeros is of order $\hbar^{-\frac{2}{3}}$ in an $\hbar^{\frac{2}{3}}$-tube around the caustic. This tube radius is the `critical radius'. For annuli of larger inner and outer radii $\hbar^α$ with $0< α< \frac{2}{3}$ we obtain density results which interpolate between this critical radius result and our prior ones in the allowed and forbidden region. We also show that the Hausdorff $(d-2)$-dimensional measure of the intersection of the nodal set with the caustic is of order $\hbar^{- \frac{2}{3}}$.
description: v3. Accepted to Communications in Mathematical Physics
Four-dimensional Quantum Gravity with a Cosmological Constant from Three-dimensional Holomorphic Blocks
Creators: name: Haggard, Hal M.
name: Han, Muxin
name: Kamiński, Wojciech
name: Riello, Aldo
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Mathematical Physics (math-ph)
subject: Geometric Topology (math.GT)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: Prominent approaches to quantum gravity struggle when it comes to incorporating a positive cosmological constant in their models. Using quantization of a complex $\mathrm{SL}(2,\mathbb{C})$ Chern-Simons theory we include a cosmological constant, of either sign, into a model of quantum gravity.
description: 5 pages and 2 figures
Fermat's Last Theorem and Catalan's Conjecture in Weak Exponential Arithmetics
Creators: name: Glivický, Petr
name: Kala, Vítězslav
Publisher: name: arXiv
Year: 2016
Subjects: subject: Logic (math.LO)
subject: FOS: Mathematics
subject: 03F30 (Primary), 11U10, 03H15, 03C62 (Secondary)

description: We study Fermat's Last Theorem and Catalan's conjecture in the context of weak arithmetics with exponentiation. We deal with expansions (B,e) of models of arithmetical theories (in the language L=(0,1,+,x,
Relativistic top in the Ostrohrads'kyj dynamics
Creators: name: Matsyuk, Roman
Publisher: name: arXiv
Year: 2015
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Differential Geometry (math.DG)
subject: Dynamical Systems (math.DS)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 83C10, 70H40, 70H50, 70E99

description: A variational equation of the fourth order for the free relativistic top is developed starting from the Dixon's system of equations for the motion of the relativistic dipole. The obtained equation is then cast into the homogeneous space-time Hamiltonian form.
description: in Ukrainian
Random walks over a super-percolating two dimensional lattice
Creators: name: Cleri, Fabrizio
Publisher: name: arXiv
Year: 2015
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Two-dimensional networks of ordered quantum dots beyond the percolation threshold are studied, as typical example of conducting nanostructures with quenched random disorder. Theory predicts anomalous diffusion with stretched-exponential relaxation at short distances, and computer simulations on lattices of crossing, straight paths of random length confirm such a behavior. Anomalous diffusion is interpreted as resulting from the higher probability of taking straight, or ballistic paths, when the traveled distance is comparable or shorter than the lattice characteristic length. Diffusion turns over to normal for longer traveled distances, whence all paths tend to become equiprobable. Such random lattice structures represent a model for realistic quantum dot networks, with potential applications in optoelectronics, photovoltaics or spintronics.
description: 4 pages; 3 figures
Mobile Edge Computing, Fog et al.: A Survey and Analysis of Security Threats and Challenges
Creators: name: Roman, Rodrigo
name: Lopez, Javier
name: Mambo, Masahiro
Publisher: name: arXiv
Year: 2016
Subjects: subject: Cryptography and Security (cs.CR)
subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences
subject: A.1; D.4.6; C.2.4

description: For various reasons, the cloud computing paradigm is unable to meet certain requirements (e.g. low latency and jitter, context awareness, mobility support) that are crucial for several applications (e.g. vehicular networks, augmented reality). To fulfil these requirements, various paradigms, such as fog computing, mobile edge computing, and mobile cloud computing, have emerged in recent years. While these edge paradigms share several features, most of the existing research is compartmentalised; no synergies have been explored. This is especially true in the field of security, where most analyses focus only on one edge paradigm, while ignoring the others. The main goal of this study is to holistically analyse the security threats, challenges, and mechanisms inherent in all edge paradigms, while highlighting potential synergies and venues of collaboration. In our results, we will show that all edge paradigms should consider the advances in other paradigms.
description: In press, accepted manuscript: Future Generation Computer Systems
Geometric aspects of Extremal Kerr black hole entropy
Creators: name: Howard, E M
Publisher: name: arXiv
Year: 2015
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Extreme Black holes are an important theoretical laboratory for exploring the nature of entropy. We suggest that this unusual nature of the extremal limit could explain the entropy of extremal Kerr black holes. The time-independence of the extremal black hole, the zero surface gravity, the zero entropy and the absence of a bifurcate Killing horizon are all related properties that define and reduce to one single unique feature of the extremal Kerr spacetime. We suggest the presence of a true geometric discontinuity as the underlying cause of a vanishing entropy.
description: 10 pages, published in Journal of Modern Physics, 2013, 4, 357-363. arXiv admin note: text overlap with arXiv:hep-th/9608162, arXiv:1201.4017 by other authors