cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Magnetic vortices instead of stripes: another interpretation of magnetic neutron scattering in lanthanum cuprates
Creators: name: Fine, Boris V.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: It is proposed, that a two-dimensional magnetic superstructure closely related to the one mentioned recently by Christensen et al. [cond-mat/0608204] constitutes a viable interpretation of the four-fold splitting of the magnetic (π, π) peak in lanthanum cuprates. (This splitting is usually interpreted as the evidence for stripes.) The superstructure in question has the topology of the square crystal of magnetic vortices with approximate periodicity (4a x 4a). This vortex crystal exhibits no magnetic antiphase lines. It is shown that such a superstructure is magnetically stable in the approximation of staggered spin polarizations, and that it should be accompanied by charge modulation characterized by charge peaks at the positions observed experimentally.
description: 4 pages, 2 figures, final version
Operads for Designing Systems of Systems
Creators: name: Baez, John C.
name: Foley, John
Publisher: name: arXiv
Year: 2020
Subjects: subject: Software Engineering (cs.SE)
subject: Category Theory (math.CT)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: System of systems engineering seeks to analyze, design and deploy collections of systems that together can flexibly address an array of complex tasks. In the Complex Adaptive System Composition and Design Environment program, we developed "network operads" as a tool for designing and tasking systems of systems, and applied them to domains including maritime search and rescue. The network operad formalism offers new ways to handle changing levels of abstraction in system-of-system design and tasking.
description: 2 pages, TikZ figure
The optical depth of the Universe to ultrahigh energy cosmic ray scattering in the magnetized large scale structure
Creators: name: Kotera, Kumiko
name: Lemoine, Martin
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: This paper provides an analytical description of the transport of ultrahigh energy cosmic rays in an inhomogeneously magnetized intergalactic medium. This latter is modeled as a collection of magnetized scattering centers such as radio cocoons, magnetized galactic winds, clusters or magnetized filaments of large scale structure, with negligible magnetic fields in between. Magnetic deflection is no longer a continuous process, it is rather dominated by scattering events. We study the interaction between high energy cosmic rays and the scattering agents. We then compute the optical depth of the Universe to cosmic ray scattering and discuss the phenomological consequences for various source scenarios. For typical parameters of the scattering centers, the optical depth is greater than unity at 5x10^{19}eV, but the total angular deflection is smaller than unity. One important consequence of this scenario is the possibility that the last scattering center encountered by a cosmic ray be mistaken with the source of this cosmic ray. In particular, we suggest that part of the correlation recently reported by the Pierre Auger Observatory may be affected by such delusion: this experiment may be observing in part the last scattering surface of ultrahigh energy cosmic rays rather than their source population. Since the optical depth falls rapidly with increasing energy, one should probe the arrival directions of the highest energy events beyond 10^{20}eV on an event by event basis to circumvent this effect.
description: version to appear in PRD; substantial improvements: extended introduction, sections added on angular images and on direction dependent effects with sky maps of optical depth, enlarged discussion of Auger results (conclusions unchanged); 27 pages, 9 figures
Additional file 1 of Chemistry, lung toxicity and mutagenicity of burn pit smoke-related particulate matter
Creators: name: Kim, Yong Ho
name: Warren, Sarah H.
name: Kooter, Ingeborg
name: Williams, Wanda C.
name: George, Ingrid J.
name: Vance, Samuel A.
name: Hays, Michael D.
name: Higuchi, Mark A.
name: Gavett, Stephen H.
name: DeMarini, David M.
name: Jaspers, Ilona
name: Gilmour, M. Ian
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Genetics
subject: FOS: Biological sciences
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Ecology
subject: Science Policy

description: Additional file 1: Table S1. Military Waste Stream Analysis (% by Weight). Table S2. Concentration (µg/g) of PAHs in the burn pit smoke PM. Table S3. Breathing parameters from the burn pit smoke exposures. Figure S1. Emission factors for VOCs of the burn pit smoke emissions. Figure S2. Mutagenicity dose–response curves of the smoldering samples in Salmonella strain TA98 with or without metabolic activation (S9). Figure S3. Mutagenicity dose–response curves of the flaming samples in Salmonella strains TA98 and TA100 with or without metabolic activation (S9). Figure S4. Correlation between biological responses and total PAH concentration of PM.
An example of Feynman-Jackson integral
Creators: name: Diaz, Rafael
name: Pariguan, Eddy
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We review the construction of a q-analogue of the Gaussian measure. We apply that construction to obtain a q-analogue of Feynman integrals and to compute explicitly an example of such integrals.
description: 5 figures, 10 pages
Aufbruch zu einer missionarischen Ökumene
Creators: name: Matthey, Jacques
name: Göpfert, Michael
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 48 Nr. 4 (1999): Ökumenische Rundschau, Band 48, Heft 4
Evolution of forest tenures in India : implications for sustainable forest management (c.1500 BC-1997 AD)
Creators: name: Singh, Ramvir
Publisher: name: University of British Columbia
Year: 2009

description: This study which explores the evolution of forest tenures grew out of a conviction that many forestry issues could be better addressed if the evolution of property rights was better understood. The focus is on forest values rather than forests. A forest tenure is conceptualized as a mechanism, approved by society, to capture, to distribute and to sustain a recognized value in a forest. It is also articulated as a triadic relationship between admitted rights (adhikaras) and assigned duties (dharma) with regard to a socially recognized value (dhan tatva) in a forest. This project pursues three research hypotheses: (i) there have been significant temporal and spatial variations in forest tenures in India, (ii) forest tenures evolved as a result of changes in demand for forest values, technological changes and changes in political institutions, and (iii) there is, at present, a divergence between de jure and de facto forest tenures. In order to address these hypotheses, research was undertaken at national, regional and local levels using a mix of quantitative and qualitative methods for collection and analysis of data drawn from diverse sources including vedic and post-vedic sacred and secular literature, historical accounts, official records, archives and village studies. It is argued that observed temporal and spatial variations in forest tenures in India have been significantly impacted over the last three and a half millennia by changes in political institutions and technology. People's demands for forest values only weakly explain these variations. The study demonstrates significant divergence between de jure and de facto tenures. Some commonly held hypotheses concerning forests and their management in India are challenged and fresh insights into a number of controversies concerning forests are offered. Some policy implications of the research are outlined. A challenge before the forest policy makers in India is how to ensure and sustain adequate investment and managerial inputs in all forests.
Counting RSA-integers
Creators: name: Decker, Andreas
name: Moree, Pieter
Publisher: name: arXiv
Year: 2008
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11N05, 94A60

description: In the RSA cryptosystem integers of the form n=p.q with p and q primes of comparable size (`RSA-integers') play an important role. It is a folklore result of cryptographers that C_r(x), the number of integers n<=x that are of the form n=pq with p and q primes such that p1 asymptotically equal to c_r*x*log^{-2}x for some constant c_r>0. Here we prove this and show that c_r=2log r.
description: to appear in Results in Mathematics, 5 pages, with the view of possible interest by cryptographers we aimed for a very short paper, rather than a more extensive technical one with stronger results
Additional file 10 of Genome-wide identification of PIP5K in wheat and its relationship with anther male sterility induced by high temperature
Creators: name: Liu, Hongzhan
name: Sun, Zhongke
name: Hu, Lizong
name: Yue, Zonghao
Publisher: name: figshare
Year: 2021
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 10: Table S1. The primer sequences of target genes for analysis of qRT-PCR.
Grammatical elicitation: Order of verbal suffixes
Creators: name: Ovelar, Irma Easty
name: Dabkowski, Maksymilian
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2021
Subjects: subject: gug

description: Order of verbal suffixes, including -gua'u, -vy, -guy, -se, -ve, -ramo, -rei, -pota, -ke, -na, -mi, -py.
The first AI simulation of a black hole
Creators: name: Nemmen, Rodrigo
name: Duarte, Roberta
name: Navarro, Joao Paulo
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We report the results from our ongoing pilot investigation of the use of deep learning techniques for forecasting the state of turbulent flows onto black holes. Deep neural networks seem to learn well black hole accretion physics and evolve the accretion flow orders of magnitude faster than traditional numerical solvers, while maintaining a reasonable accuracy for a long time.
description: 5 pages, 2 figures. To be published in Proceedings of IAU Symposium No. 359, 2020, "Galaxy evolution and feedback across different environments". Presented in March 2020
XIVA XONLIGIDA TA'LIM-TARBIYA TIZIMI
Creators: name: Qurbonnazarova, Shahnoza
Publisher: name: Zenodo
Year: 2024

description: Buxoro amirligi, Qo’qon va Xiva xonliklarida xalq ta’limining tuzilishi va faoliyati deyarli bir xil bo’lgan. Ularda madrasalar, maktablar va qoriqxonalar mavjud edi. Madrasalar musulmon oliy o’quv yurtlari hisoblangan. Maktablar masjidlar qoshida va xususiy uylarda tashkil etilgan. Xonlar o’rtasida xonzoda va zodagonlarning bolalarini o’qitish uchun maxsus maktab bor edi. Masalan, «Ansob as-solatin va tavorixi al-havoqin» nomli asarda yozilishcha, «Musulmonqul mingboshining buyrug’i bilan yosh Xudoyorxon va qipchoqlar bolalarini o’qitish uchun o’rdada maktab qurilib, unga maktabdor etib Mullo So-diq tayinlangan».
Non-uniqueness in conformal formulations of the Einstein constraints
Creators: name: Walsh, D. M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Standard methods in non-linear analysis are used to show that there exists a parabolic branching of solutions of the Lichnerowicz-York equation with an unscaled source. We also apply these methods to the extended conformal thin sandwich formulation and show that if the linearised system develops a kernel solution for sufficiently large initial data then we obtain parabolic solution curves for the conformal factor, lapse and shift identical to those found numerically by Pfeiffer and York. The implications of these results for constrained evolutions are discussed.
description: Arguments clarified and typos corrected. Matches published version
OTFS Based Random Access Preamble Transmission For High Mobility Scenarios
Creators: name: Sinha, Alok Kumar
name: Mohammed, Saif Khan
name: Raviteja, P.
name: Hong, Yi
name: Viterbo, Emanuele
Publisher: name: arXiv
Year: 2020
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: We consider the problem of uplink timing synchronization for Orthogonal Time Frequency Space (OTFS) modulation based systems where information is embedded in the delay-Doppler (DD) domain. For this, we propose a novel Random Access (RA) preamble waveform based on OTFS modulation. We also propose a method to estimate the round-trip propagation delay between a user terminal (UT) and the base station (BS) based on the received RA preambles in the DD domain. This estimate (known as the timing advance estimate) is fed back to the respective UTs so that they can advance their uplink timing in order that the signal from all UTs in a cell is received at the BS in a time-synchronized manner. Through analysis and simulations we study the impact of OTFS modulation parameters of the RA preamble on the probability of timing error, which gives valuable insights on how to choose these parameters. Exhaustive numerical simulations of high mobility scenarios suggests that the timing error probability (TEP) performance of the proposed OTFS based RA is much more robust to channel induced multi-path Doppler shift when compared to the RA method in Fourth Generation (4G) systems.
description: Accepted in IEEE Transactions on Vehicular Technology. Copyright 2020 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses (see IEEE Publication Services and Products Board Operations Manual)
Binary crystals in two-dimensional two-component Yukawa mixtures
Creators: name: Assoud, Lahcen
name: Messina, Rene
name: Loewen, Hartmut
Publisher: name: arXiv
Year: 2008
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The zero-temperature phase diagram of binary mixtures of particles interacting via a screened Coulomb pair potential is calculated as a function of composition and charge ratio. The potential energy obtained by a Lekner summation is minimized among a variety of candidate two-dimensional crystals. A wealth of different stable crystal structures is identified including $A,B,AB_2, A_2B, AB_4$ structures [$A$ $(B)$ particles correspond to large (small) charge.] Their elementary cells consist of triangular, square or rhombic lattices of the $A$ particles with a basis comprising various structures of $A$ and $B$ particles. For small charge asymmetry there are no intermediate crystals besides the pure $A$ and $B$ triangular crystals.
description: RevTeX 4 - 17 pages - 6 main figures
ADMM-Net for Communication Interference Removal in Stepped-Frequency Radar
Creators: name: Johnston, Jeremy
name: Li, Yinchuan
name: Lops, Marco
name: Wang, Xiaodong
Publisher: name: arXiv
Year: 2020
Subjects: subject: Signal Processing (eess.SP)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Complex ADMM-Net, a complex-valued neural network architecture inspired by the alternating direction method of multipliers (ADMM), is designed for interference removal in super-resolution stepped frequency radar angle-range-doppler imaging. Tailored to an uncooperative scenario wherein a MIMO radar shares spectrum with communications, the ADMM-Net recovers the radar image---which is assumed to be sparse---and simultaneously removes the communication interference, which is modeled as sparse in the frequency domain owing to spectrum underutilization. The scenario motivates an $\ell_1$-minimization problem whose ADMM iteration, in turn, undergirds the neural network design, yielding a set of generalized ADMM iterations that have learnable hyperparameters and operations. To train the network we use random data generated according to the radar and communication signal models. In numerical experiments ADMM-Net exhibits markedly lower error and computational cost than ADMM and CVX.
Black Holes at the IceCube Neutrino Telescope
Creators: name: Anchordoqui, Luis A.
name: Glenz, Matthew M.
name: Parker, Leonard
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: If the fundamental Planck scale is about a TeV and the cosmic neutrino flux is at the Waxman-Bahcall level, quantum black holes are created daily in the Antarctic ice-cap. We re-examine the prospects for observing such black holes with the IceCube neutrino-detection experiment. To this end, we first revise the black hole production rate by incorporating the effects of inelasticty, i.e., the energy radiated in gravitational waves by the multipole moments of the incoming shock waves. After that we study in detail the process of Hawking evaporation accounting for the black hole's large momentum in the lab system. We derive the energy spectrum of the Planckian cloud which is swept forward with a large, O (10^6), Lorentz factor. (It is noteworthy that the boosted thermal spectrum is also relevant for the study of near-extremal supersymmetric black holes, which could be copiously produced at the LHC.) In the semiclassical regime, we estimate the average energy of the boosted particles to be less than 20% the energy of the neutrino-progenitor. Armed with such a constraint, we determine the discovery reach of IceCube by tagging on "soft" (relative to what one would expect from charged current standard model processes) muons escaping the electromagnetic shower bubble produced by the black hole's light descendants. The statistically significant 5-sigma excess extends up to a quantum gravity scale ~ 1.3 TeV.
description: Matching version to be published in Phys. Rev. D
Additional file 1 of Prevalence and associated factors of COVID-19 across Italian regions: a secondary analysis from a national survey on physiotherapists
Creators: name: Gambazza, Simone
name: Bargeri, Silvia
name: Campanini, Isabella
name: Meroni, Roberto
name: Turolla, Andrea
name: Castellini, Greta
name: Gianola, Silvia
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Biotechnology
subject: Immunology
subject: FOS: Clinical medicine
subject: 111714 Mental Health
subject: FOS: Health sciences
subject: 110309 Infectious Diseases
subject: Computational Biology

description: Additional file 1. Checklist for Reporting Results of Internet E-Surveys (CHERRIES).
title: Patronage of the Knights Hospitaller in Britain and Ireland, 1291-1400
Creators: name: MacLellan, Rory
Publisher: name: University of St Andrews
Year: 2019

description: This study examines what motivated donors to the Knights Hospitaller throughout the British Isles from 1291 to 1400. The Hospitallers, a military-religious order which fought in the crusades, came to Britain and Ireland in the twelfth century. It soon became, due to the generosity of donors from all levels of society, one of the archipelago’s largest ecclesiastical institutions. This thesis is the first study of donations to the Hospitallers in the British Isles, allowing conclusions to be drawn about the Order’s patronage and relations with societies throughout Britain and Ireland. Chapter One discusses the role of the Hospitallers’ crusading, knighthood, and hospitality in motivating donors, finding that these traditional explanations behind patronage, particularly crusading, played only a minor role. Chapter Two finds that their military support of England did influence patronage by alienating support, but only in Ireland, Scotland, and Wales. The remaining chapters show what really motivated most patrons: personal and professional ties, particularly familial, religious benefactions, and localism. At each stage, the Hospitallers’ patronage is compared with that of other religious orders, finding that there was little difference between what motivated donations to military and non-military orders. Such a conclusion has important implications for the treatment of the military orders in studies of medieval religion, many of which relegate these orders to a subfield of crusade studies rather than treating them as a full part of mainstream religious life. It also suggests that we should reconsider the place of the military orders within the societies of late medieval Britain and Ireland. They were not valued by most donors primarily as outposts of the crusade movement, but rather were treated firstly as professed religious offering much the same services as any other house: intercessory prayer, employment, trade, and acting as a source of prestige for those who patronised them.
Late Quaternary dynamics of Arctic biota from ancient environmental genomics
Creators: name: Wang, Yucheng
name: Pedersen, Mikkel Winther
name: Alsos, Inger Greve
name: De Sanctis, Bianca
name: Racimo, Fernando
name: Prohaska, Ana
name: Coissac, Eric
name: Owens, Hannah Lois
name: Merkel, Marie Kristine Føreid
name: Fernandez-Guerra, Antonio
name: Rouillard, Alexandra
name: Lammers, Youri
name: Alberti, Adriana
name: Denoeud, France
name: Money, Daniel
name: Ruter, Anthony H.
name: McColl, Hugh
name: Larsen, Nicolaj Krog
name: Cherezova, Anna A.
name: Edwards, Mary E.
name: Fedorov, Grigory B.
name: Haile, James
name: Orlando, Ludovic
name: Vinner, Lasse
name: Korneliussen, Thorfinn Sand
name: Beilman, David W.
name: Bjørk, Anders A.
name: Cao, Jialu
name: Dockter, Christoph
name: Esdale, Julie
name: Gusarova, Galina
name: Kjeldsen, Kristian K.
name: Mangerud, Jan
name: Rasic, Jeffrey T.
name: Skadhauge, Birgitte
name: Svendsen, John Inge
name: Tikhonov, Alexei
name: Wincker, Patrick
name: Xing, Yingchun
name: Zhang, Yubin
name: Froese, Duane G.
name: Rahbek, Carsten
name: Bravo, David Nogues
name: Holden, Philip B.
name: Edwards, Neil R.
name: Durbin, Richard
name: Meltzer, David J.
name: Kjær, Kurt H.
name: Möller, Per
name: Willerslev, Eske
Publisher: name: Apollo - University of Cambridge Repository
Year: 2021
Subjects: Article
/631/158/2463
/631/158/2462
/631/208/212/2142
/631/208/514/2254
/704/158/2165
/38/23
/45/22
article

description: Abstract: During the last glacial–interglacial cycle, Arctic biotas experienced substantial climatic changes, yet the nature, extent and rate of their responses are not fully understood1–8. Here we report a large-scale environmental DNA metagenomic study of ancient plant and mammal communities, analysing 535 permafrost and lake sediment samples from across the Arctic spanning the past 50,000 years. Furthermore, we present 1,541 contemporary plant genome assemblies that were generated as reference sequences. Our study provides several insights into the long-term dynamics of the Arctic biota at the circumpolar and regional scales. Our key findings include: (1) a relatively homogeneous steppe–tundra flora dominated the Arctic during the Last Glacial Maximum, followed by regional divergence of vegetation during the Holocene epoch; (2) certain grazing animals consistently co-occurred in space and time; (3) humans appear to have been a minor factor in driving animal distributions; (4) higher effective precipitation, as well as an increase in the proportion of wetland plants, show negative effects on animal diversity; (5) the persistence of the steppe–tundra vegetation in northern Siberia enabled the late survival of several now-extinct megafauna species, including the woolly mammoth until 3.9 ± 0.2 thousand years ago (ka) and the woolly rhinoceros until 9.8 ± 0.2 ka; and (6) phylogenetic analysis of mammoth environmental DNA reveals a previously unsampled mitochondrial lineage. Our findings highlight the power of ancient environmental metagenomics analyses to advance understanding of population histories and long-term ecological dynamics.
Additional file 2 of Prevalence and associated factors of COVID-19 across Italian regions: a secondary analysis from a national survey on physiotherapists
Creators: name: Gambazza, Simone
name: Bargeri, Silvia
name: Campanini, Isabella
name: Meroni, Roberto
name: Turolla, Andrea
name: Castellini, Greta
name: Gianola, Silvia
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Biotechnology
subject: Immunology
subject: FOS: Clinical medicine
subject: 111714 Mental Health
subject: FOS: Health sciences
subject: 110309 Infectious Diseases
subject: Computational Biology

description: Additional file 2. Questionnaire.
Grammatical elicitation: Causativizing ideophones, negation, suffix stacking, sentence translation
Creators: name: Gómez, María
name: Russell, Katherine
name: Dabkowski, Maksymilian
name: Jarvis, Rebecca
name: Michael, Lev
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2021
Subjects: subject: gug

description: Ideophones with causative nasalization. Negation with Spanish loanwords; stacking of harmonic suffixes; translation of sentences from Spanish.
XROMASOMA MUTATSIYALARI VA UNING INSON SALOMATLIGIGA TA'SIRI
Creators: name: Yo'ldashev, Abduvali
name: Olimova, Muxlisa
Publisher: name: Zenodo
Year: 2024

description: Ushbu maqolada xromasoma mutatsiyalarining turlari, mutatsiya sabablari, jinsiy hujayralar yetilishi davomida sodir bo‘ladigan turli anomal holatlar va buning oqibatida yuzaga keladigan irsiy kasalliklar, ularning belgilari, mutatsiyalarning oldini olish usullari haqida ma’lumotlar berilgan.
Propagators in Yang-Mills theory for different gauges
Creators: name: Maas, Axel
name: Cucchieri, Attilio
name: Mendes, Tereza
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Green's functions are gauge-dependent quantities. Thus, the manifestation of confinement in these correlation functions also depends on the gauge. Here we use lattice gauge theory to study the gluon and the ghost propagators in a gauge (the so-called lambda-gauge) interpolating between the Landau and the Coulomb gauge. Results are compared to the usual minimal Landau gauge.
description: 3 pages, 2 figures, talk presented by AM at the conference "Quark Confinement and the Hadron Spectrum VII", Ponta Delgada, Portugal, 2nd-7th of September 2006; submitted to the proceedings
Entanglement entropy of cosmological perturbations for S-brane Ekpyrosis
Creators: name: Brahma, Suddhasattwa
name: Brandenberger, Robert
name: Wang, Ziwei
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We calculate the entanglement entropy of scalar perturbations due to gravitational non-linearities present in any model of canonically-coupled, single-field ekpyrosis. Specifically, we focus on a recent model of improved ekpyrosis which is able to generate a scale-invariant power spectrum of curvature perturbations and gravitational waves as well as have a non-singular bounce due to an S-brane at the end of ekpyrotic contraction. By requiring that the entanglement entropy remians subdominant to the thermal entropy produced during reheating, we get an upper bound on the energy scale of the bounce.
description: 7 pages
Additional file 3 of Prevalence and associated factors of COVID-19 across Italian regions: a secondary analysis from a national survey on physiotherapists
Creators: name: Gambazza, Simone
name: Bargeri, Silvia
name: Campanini, Isabella
name: Meroni, Roberto
name: Turolla, Andrea
name: Castellini, Greta
name: Gianola, Silvia
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Biotechnology
subject: Immunology
subject: FOS: Clinical medicine
subject: 111714 Mental Health
subject: FOS: Health sciences
subject: 110309 Infectious Diseases
subject: Computational Biology

description: Additional file 3. Cluster analysis.
Voila mon Billet - pour mon Logis
Creators: name: Neustück, Maximilian
Publisher: name: [s.n.]
Year: 1790
Subjects: Soldat

description: Max Neustück inv. et fecit
description: Ein weiteres, koloriertes Exemplar befindet sich unter der Signatur: Geschichte 1793 Basel I, 3 ebenfalls im Bestand der Graphischen Sammlung
Additional file 4 of Prevalence and associated factors of COVID-19 across Italian regions: a secondary analysis from a national survey on physiotherapists
Creators: name: Gambazza, Simone
name: Bargeri, Silvia
name: Campanini, Isabella
name: Meroni, Roberto
name: Turolla, Andrea
name: Castellini, Greta
name: Gianola, Silvia
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Biotechnology
subject: Immunology
subject: FOS: Clinical medicine
subject: 111714 Mental Health
subject: FOS: Health sciences
subject: 110309 Infectious Diseases
subject: Computational Biology

description: Additional file 4. Additional analyses Prevalence of COVID-19 in all regions.
Visualisation materials and tools available for MR2 development
Creators: name: Dagsson, Þormóður
name: Viðarsson, Jónas R.
Publisher: name: Zenodo
Year: 2020
Subjects: Fisheries management
Training
Common Fisheries Policy (CFP)
Fisheries Partnership Agreement
Stock assessment
Senegal
EU fleet
Maximum Sustainable Yield
Seychelles
Mauritania
Cape Verde

description: This report summarises the progress and main outputs when it comes to development of visualisation materials and visualisation tools within the FarFish project. Development of visualisation materials and other visualisation tools that allow stakeholders to easily understand otherwise complicate data on e.g. biological, ecological, economic, social and political issues relevant for the six FarFish case studies is an important component of the FarFish project. These visualisation materials and tools have the purpose of assisting stakeholders within the case studies when developing Management Recommendations (MRs), by sowing in a simple manner historic data and forecasts. The forecasts are in particular intended to provide stakeholders with most likely scenarios or effects of MR implementation (what if? scenarios). The visualisation materials and other visualisation tools do also have an important purpose for overall aim of the FarFish project, when it comes to advancing knowledge on fisheries in the case studies, both for internal use within the project and for stakeholders outside of the project. The FarFish project is run in an iterative process, which amongst other things means that MRs will be developed, tested/validated and audited/valuated twice during the lifetime of the project. The second MRs (MR2) are to be developed and audited in the second half of the project. The visualisation materials and other visualisation tools are also expected to go through similar iterative process, where first and second versions are intended to assist stakeholders with developing MR1 and MR2. This deliverable reports on the progress and current status of the visualisation materials and visualisation tools that have been, or are intended to be, made available within the FarFish project to support MR2 development.
A Fully Pseudospectral Scheme for Solving Singular Hyperbolic Equations
Creators: name: Hennig, Jörg
name: Ansorg, Marcus
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: With the example of the spherically symmetric scalar wave equation on Minkowski space-time we demonstrate that a fully pseudospectral scheme (i.e. spectral with respect to both spatial and time directions) can be applied for solving hyperbolic equations. The calculations are carried out within the framework of conformally compactified space-times. In our formulation, the equation becomes singular at null infinity and yields regular boundary conditions there. In this manner it becomes possible to avoid "artificial" conditions at some numerical outer boundary at a finite distance. We obtain highly accurate numerical solutions possessing exponential spectral convergence, a feature known from solving elliptic PDEs with spectral methods. Our investigations are meant as a first step towards the goal of treating time evolution problems in General Relativity with spectral methods in space and time.
description: 24 pages, 12 figures
SAB'AI SAYYOR DOSTONI BADIIYATI
Creators: name: Kubayeva, Madinabonu
Publisher: name: Zenodo
Year: 2024

description: Ushbu maqolada Alisher Navoiyning "Sab'ai Sayyor" dostoni haqida maʼlumotlar berish, ushbu dostonning boshqa Bahrom haqidagi dostonlardan farqini tasvirlab berish.
Dynamical collapse in a degenerate binary fermion mixture using a hydrodynamic model
Creators: name: Adhikari, Sadhan K.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We use a time-dependent dynamical hydrodynamic model to study a collapse in a degenerate fermion-fermion mixture (DFFM) of different atoms. Due to a strong Pauli-blocking repulsion among identical spin-polarized fermions at short distances there cannot be a collapse for repulsive interspecies fermion-fermion interaction. However, there can be a collapse for a sufficiently attractive interspecies fermion-fermion interaction in a DFFM of different atoms. Using a variational analysis and numerical solution of the hydrodynamic model we study different aspects of collapse in such a DFFM initiated by a jump in the interspecies fermion-fermion interaction (scattering length) to a large negative (attractive) value using a Feshbach resonance. Suggestion for experiments of collapse in a DFFM of distinct atoms is made.
description: 18 pages, 9 figures
Grammatical elicitation: Verbal nominals and agents
Creators: name: Gómez, María
name: Jarvis, Rebecca
name: Dabkowski, Maksymilian
name: Michael, Lev
name: Russell, Katherine
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2021
Subjects: subject: gug

description: Expressing agents in verbal nominals and on different types of verbs.
Selection management of interior Douglas-fir for mule deer winter range
Creators: name: Day, John Kenneth
Publisher: name: University of British Columbia
Year: 2009

description: A working plan for the Knife Creek block of the Alex Fraser Research Forest is presented. The plan recommends single-tree selection management of interior Douglas-fir (Pseudotsuga menzesii var. glaucd) to maintain and enhance winter range habitat for mule deer (Odocoileus hemionus hemionus) near Williams Lake in central British Columbia. An extensive review of the literature describes the silvics of Douglas-fir, the ecology and history of the area, and the ecology of mule deer. Mule deer at Knife Creek are dependent upon Douglas-fir forests, because large Douglasfirs provide shelter from winter snow and wind-blown litterfall as forage. It is suggested that current stand structures are different from the condition that existed a century ago, and place winter range values at risk due to fire and insect attack. Single-tree-selection management will reduce those risks over time. Stand level regulation by the "Basal Area - Maximum Diameter - q Factor" method is pursued, and two target stand structures are recommended: -Low to moderate cover is provided by B = 18 m²/ha D = 60 cm dbh, and q = 1.25 -Moderate to high cover is provided by B = 25 m²/ha D = 70 cm dbh, and q = 1.2 Cover for deer will vary within a stand depending upon time since harvest. A cutting cycle of 20 years is recommended, and forest level regulation is provided by area control. The Allowable Annual Cut is thereby established as 170.9 ha/year. A stand table projection model is offered without validation. Once completed, the model will be used to develop a volume check for the allowable cut, thereby developing a harvest queue that will provide relatively even flow of timber volume. Methodologies for sampling and describing stands, developing prescriptions, and implementing cutting plans are provided. A list of research and training required to implement this plan across similar winter ranges in the Cariboo Forest Region is provided. Implementation of this working plan will provide a blueprint for managing mule deer winter range by single-treeselection management of Douglas-fir. Key Words: Cariboo Region, Interior Douglas-fir zone, logging guidelines, mule deer, Odocoileus hemionus hemionus, Pseudotsuga menzesii var. glauca, single-tree selection management, Alex Fraser Research Forest, uneven-aged management
Dissipation of jet bulk kinetic energy in powerful blazars
Creators: name: Katarzynski, K.
name: Ghisellini, G.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We investigate the dissipation of the bulk kinetic energy of a relativistic jet at different distances from the central power--house and analyse in detail how the dissipated energy is radiated away. We assume that the location of the dissipation region is a function of the bulk Lorentz factor Gamma of the jet, being closer to the center for smaller Gamma. This assumption is naturally fulfilled in the internal shock scenario. The dissipated energy is partially used to accelerate electrons and to amplify the magnetic field. This process creates a source inside the jet (blob). Such blobs may efficiently produce synchrotron and inverse Compton emission. We find that even if the blobs or shells responsible for the blazar activity carry the same energy (in bulk kinetic form), the fact that they move at different Gamma can produce dramatic variations in different bands, even if the bolometric luminosity is instead very similar. This is due to the relative importance of the synchrotron, self-Compton and external Compton radiation processes, which greatly changes by changing Gamma and the compactness of the source, even if the total radiated energy is constant. We then find that the jet can produce most of its radiative output at small distances from the putative black-hole and its accretion disk, if this implies a low level of emitted MeV-GeV flux. Our findings, which we apply for illustrative purposes to the blazar 3C 454.3, will be easily testable by the coming gamma-ray satellite, such as AGILE and GLAST.
description: accepted for publication in A&A
A Diffractive Study of Parametric Process in Nonlinear Photonic Crystals
Creators: name: Guo, H. C.
name: Qin, Y. Q.
name: You, G. J.
name: Liu, W. M.
name: Tang, S. H.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We report a general description of quasi-phase-matched parametric process in nonlinear photonic crystals (NLPC) by extending the conventional X-ray diffraction theory in solids. Under the virtual wave approximation, phase-matching resonance is equivalent to the diffraction of the scattered virtual wave. Hence a modified NLPC Ewald construction can be built up, which illustrates the nature of the accident for the diffraction of the virtual wave in NLPC and further reveals the complete set of diffractions of the virtual wave for both of the air-dielectric and dielectric-dielectric contacts. We show the two basic linear sequences, the anti-stacking and para-stacking linear sequences, in one-dimension (1D) NLPC and present a general rule for multiple phase-matching resonances in 1D NLPC. The parameters affecting the NLPC structure factor are investigated, which indicate that not only the Ewald construction but also the relative NLPC atom size together determine whether a diffraction of the virtual wave can occur in 2D NLPC. The results also show that 1D NLPC is a better choice than 2D NLPC for a single parametric process.
Cramér-Rao Bound Optimization for Joint Radar-Communication Design
Creators: name: Liu, Fan
name: Liu, Ya-Feng
name: Li, Ang
name: Masouros, Christos
name: Eldar, Yonina C.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Signal Processing (eess.SP)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: In this paper, we propose multi-input multi-output (MIMO) beamforming designs towards joint radar sensing and multi-user communications. We employ the Cramér-Rao bound (CRB) as a performance metric of target estimation, under both point and extended target scenarios. We then propose minimizing the CRB of radar sensing while guaranteeing a pre-defined level of signal-to-interference-plus-noise ratio (SINR) for each communication user. For the single-user scenario, we derive a closed form for the optimal solution for both cases of point and extended targets. For the multi-user scenario, we show that both problems can be relaxed into semidefinite programming by using the semidefinite relaxation approach, and prove that the global optimum can always be obtained. Finally, we demonstrate numerically that the globally optimal solutions are reachable via the proposed methods, which provide significant gains in target estimation performance over state-of-the-art benchmarks.
description: 13 pages, 7 figures, submitted to IEEE for possible publications
REEEM-D1.1_Report On Pathway Definition
Creators: name: REEEM Project
Publisher: name: Zenodo
Year: 2019

description: This report describes the process for the definition of EU energy transition pathways developed in
 REEEM and introduces the structure, main assumptions and preliminary impact indicators of the first
 pathways defined. It addresses different groups of readers, specifically 1) the general audience, since it
 presents in a transparent fashion the methodological and modelling framework developed in REEEM,
 2) the European Commission, through its explicit link with the Energy Union and the SET-Plan, 3) energy
 modellers and modelling projects, in that it delivers a scientifically sound and repeatable process to
 define pathways for a multi-model and multi-sectoral analysis, 4) stakeholders, since it pinpoints the
 steps in the REEEM activities where interaction with them is essential and explains how it occurs, 5) the
 REEEM partners, in its guiding the modelling teams towards the creation of an integrated modelling
 framework and the continuation of the quantitative analyses.
 The methodology and this related report are a joint effort of all the partners involved in REEEM Work
 Package 1 (Transformation strategies and pathways).
Mirror potentials in classical mechanics
Creators: name: del Castillo, G. F. Torres
name: Garcia, I. Rubalcava
Publisher: name: arXiv
Year: 2006
Subjects: subject: Classical Physics (physics.class-ph)
subject: General Physics (physics.gen-ph)
subject: FOS: Physical sciences

description: It is shown that for a central potential that is an injective function of the radial coordinate, a second central potential can be found that leads to trajectories in the configuration space and the momentum space coinciding, respectively, with the trajectories in the momentum space and the configuration space produced by the original potential.
description: 5 pages, Accepted for publication in Rev. Mex. Fis
Causal Viscous Hydrodynamics for Central Heavy-Ion Collisions
Creators: name: Baier, Rudolf
name: Romatschke, Paul
Publisher: name: arXiv
Year: 2006
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study causal viscous hydrodynamics in the context of central relativistic heavy-ion collisions and provide details of a straightforward numerical algorithm to solve the hydrodynamic equations. It is shown that correlation functions of fluctuations provide stringent test cases for any such numerical algorithm. Passing these tests, we study the effects of viscosity on the temperature profile in central heavy-ion collisions. Also, we find that it is possible to counter-act the effects of viscosity to some extent by re-adjusting the initial conditions. However, viscous corrections are strongest for high-mass particles, signaling the breakdown of hydrodynamic descriptions for large eta/s.
description: 15 pages, 10 figures, revtex4; v2: bug corrected, minor changes in results; sec IV.B. modified due to referee report
Symbolic Abstractions for Nonlinear Control Systems via Feedback Refinement Relation
Creators: name: Ren, Wei
name: Dimarogonas, Dimos V.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Systems and Control (eess.SY)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: This paper studies the construction of symbolic abstractions for nonlinear control systems via feedback refinement relation. Both the delay-free and time-delay cases are addressed. For the delay-free case, to reduce the computational complexity, we propose a new approximation approach for the state and input sets based on a static quantizer, and then a novel symbolic model is constructed such that the original system and the symbolic model satisfy the feedback refinement relation. For the time-delay case, both static and dynamic quantizers are combined to approximate the state and input sets. This leads to a novel dynamic symbolic model for time-delay control systems, and a feedback refinement relation is established between the original system and the symbolic model. Finally, a numerical example is presented to illustrate the obtained results.
description: 9 pages, 8 figures
Decoherence versus disentanglement for two qubits in a squeezed bath
Creators: name: Hernandez, Maritza
name: Orszag, Miguel
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study the relation between the sudden death and revival of the entanglement of two qubits in a common squeezed reservoir, and the normal decoherence, by getting closer to the Decoherence Free Subspace and calculating the effect on the death and revival times.
description: 9 pages, 13 figures
Kondo screening regimes in multi-Dirac and Weyl systems
Creators: name: Pedrosa, G. T. D.
name: Silva, Joelson F.
name: Vernek, E.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We have investigated the Kondo physics of a single magnetic impurity embedded in multi-Dirac (Weyl) node fermionic systems. By using a generic effective model for the host material and employing a numerical renormalization group approach we access the low temperature behavior of the system, identifying the existence of Kondo screening in single-, double-, and triple-Dirac (Weyl) node models. We find that in any multi-Dirac node systems the low-energy regime lies within one of the known classes of pseudogap Kondo problem, extensively studied in the literature. Kondo screening is also observed for time reversal symmetry broken Weyl systems. This is, however, possible only in the particle-hole symmetry broken regime obtained for finite chemical potential $μ$. Although weakly, breaking time-reversal symmetry suppresses the Kondo resonance, especially in the single-node Weyl semimetals. More interesting Kondo screening regimes are obtained for inversion symmetry broken multi-Weyl fermions. In these systems the Kondo regimes of double- and triple-Weyl node models are much richer than in the single-Weyl node model. While in the single-Weyl node model the Kondo temperature increases monotonically with $|μ|$ regardless the value of the inversion symmetry breaking parameter $Q_0$, in double- and triple-Weyl node models there are two distinct regimes: (i) For $Q_0< |μ|$ the Kondo temperature depends strongly on $μ$, while (ii) for $Q_0 > |μ|$ the Kondo temperature depends very weakly on $μ$, resembling the flat-band single impurity Anderson model.
description: 9 figures, 10 pages