cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Exact non-Markovian master equation for a driven damped two-level system
Creators: name: Shen, H. Z.
name: Qin, M.
name: Xiu, Xiao-Ming
name: Yi, X. X.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Driven two-level system is a useful model to describe many quantum objects, particularly in quantum information processing. However, the exact master equation for such a system is barely explored. Making use of the Feynman-Vernon influence functional theory, we derive an exact non-Markovian master equation for the driven two-level system and show the lost feature in the perturbative treatment for this system. The perturbative treatment leads to the time-convolutionless (TCL) and the Nakajima-Zwanzig (NZ) master equations. So to this end, we derive the time-convolutionless (TCL) and the Nakajima-Zwanzig (NZ) master equations for the system and compare the dynamics given by the three master equations. We find the validity condition for the TCL and NZ master equations. Based on the exact non-Markovian master equation, we analyze the regime of validity for the secular approximation in the time-convolutionless master equation and discuss the leading corrections of the nonsecular terms to the quantum dynamics, significant effects are found in the dynamics of the driven system.
description: 14 pages, 9 figures. arXiv admin note: text overlap with arXiv:0907.4629 by other authors
DC resistivity at the onset of spin density wave order in two-dimensional metals
Creators: name: Patel, Aavishkar A.
name: Sachdev, Subir
Publisher: name: arXiv
Year: 2014
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The theory for the onset of spin density wave order in a metal in two dimensions flows to strong coupling, with strong interactions not only at the `hot spots', but on the entire Fermi surface. We advocate the computation of DC transport in a regime where there is rapid relaxation to local equilibrium around the Fermi surface by processes which conserve total momentum. The DC resistivity is then controlled by weaker perturbations which do not conserve momentum. We consider variations in the local position of the quantum critical point, induced by long-wavelength disorder, and find a contribution to the resistivity which is linear in temperature (up to logarithmic corrections) at low temperature. Scattering of fermions between hot spots, by short-wavelength disorder, leads to a residual resistivity and a correction which is linear in temperature.
description: 25 pages, 5 figures, published version
Vesicular and conductive mechanisms of nucleotide release
Creators: name: Lazarowski, Eduardo R.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2012

description: Extracellular nucleotides and nucleosides promote a vast range of physiological responses, via activation of cell surface purinergic receptors. Virtually all tissues and cell types exhibit regulated release of ATP, which, in many cases, is accompanied by the release of uridine nucleotides. Given the relevance of extracellular nucleotide/nucleoside-evoked responses, understanding how ATP and other nucleotides are released from cells is an important physiological question. By facilitating the entry of cytosolic nucleotides into the secretory pathway, recently identified vesicular nucleotide and nucleotide-sugar transporters contribute to the exocytotic release of ATP and UDP-sugars not only from endocrine/exocrine tissues, but also from cell types in which secretory granules have not been biochemically characterized. In addition, plasma membrane connexin hemichannels, pannexin channels, and less-well molecularly defined ATP conducting anion channels have been shown to contribute to the release of ATP (and UTP) under a variety of conditions.
UTP is not a biased agonist at human P2Y11 receptors
Creators: name: Morrow, Gael B.
name: Nicholas, Robert A.
name: Kennedy, Charles
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2014

description: Biased agonism describes a multi-state model of G protein-coupled receptor activation in which each ligand induces a unique structural conformation of the receptor, such that the receptor couples differentially to G proteins and other intracellular proteins. P2Y receptors are G protein-coupled receptors that are activated by endogenous nucleotides, such as ATP and UTP. A previous report suggested that UTP may be a biased agonist at the human P2Y11 receptor, as it increased cytosolic [Ca2+], but did not induce accumulation of inositol phosphates, whereas ATP did both. The mechanism of action of UTP was unclear, so the aim of this study was to characterise the interaction of UTP with the P2Y11 receptor in greater detail. Intracellular Ca2+ was monitored in 1321N1 cells stably expressing human P2Y11 receptors using the Ca2+-sensitive fluorescent indicator, fluo-4. ATP evoked a rapid, concentration-dependent rise in intracellular Ca2+, but surprisingly, even high concentrations of UTP were ineffective. In contrast, UTP was slightly, but significantly more potent than ATP in evoking a rise in intracellular Ca2+ in 1321N1 cells stably expressing the human P2Y2 receptor, with no difference in the maximum response. Thus the lack of response to UTP at hP2Y11 receptors was not due to a problem with the UTP solution. Furthermore, coapplying a high concentration of UTP with ATP did not inhibit the response to ATP. Thus contrary to a previous report, we find no evidence for an agonist action of UTP at the human P2Y11 receptor, nor does UTP act as an antagonist.
Involvement of NADPH oxidase in A2A adenosine receptor-mediated increase in coronary flow in isolated mouse hearts
Creators: name: Ledent, Catherine
name: Tilley, Stephen L.
name: Rajamani, Uthra
name: Labazi, Hicham
name: Zhou, Zhichao
name: Mustafa, S. Jamal
name: Teng, Bunyen
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2015

description: Adenosine increases coronary flow mainly through the activation of A
Living the Golden Rule: Reciprocal Exchanges among African Americans with Cancer
Creators: name: Sandelowski, Margarete
name: Hamilton, Jill B.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2003

description: Giving is receiving, and receiving is giving. This is the key finding from interviews conducted with 28 African American women and men with cancer who were active participants in dynamic relationships characterized by both giving and receiving. These participants engaged in reciprocal relationships varying in the number of persons involved, types of resources exchanged, and timing of exchange. Findings suggest the need to reconceptualize social support as caregiving and caregiving as social support. This study also points to the need to redesign intervention studies to be more inclusive of components that allow the elderly in illness-related situations to maintain their status as givers in their social networks.
walter: A Tool for Predicting Resolved Stellar Population Observations with Applications to the Roman Space Telescope
Creators: name: Lancaster, Lachlan
name: Pearson, Sarah
name: Williams, Benjamin F.
name: Johnston, Kathryn V.
name: Starkenburg, Tjitske K.
name: Kado-Fong, Erin
name: Seth, Anil C.
name: Bell, Eric F.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Studies of resolved stellar populations in the Milky Way and nearby galaxies reveal an amazingly detailed and clear picture of galaxy evolution. Within the Local Group, the ability to probe the stellar populations of small and large galaxies opens up the possibility of exploring key questions such as the nature of dark matter, the detailed formation history of different galaxy components, and the role of accretion in galactic formation. Upcoming wide-field surveys promise to extend this ability to all galaxies within 10~Mpc, drastically increasing our capability to decipher galaxy evolution and enabling statistical studies of galaxies' stellar populations. To facilitate the optimum use of these upcoming capabilities we develop a simple formalism to predict the density of resolved stars for an observation of a stellar population at fixed surface brightness and population parameters. We provide an interface to calculate all quantities of interest to this formalism via a public release of the code: \texttt{walter}. This code enables calculation of (i) the expected number density of detected stars, (ii) the exposure time needed to reach certain population features, such as the horizontal branch, and (iii) an estimate of the crowding limit, among other features. These calculations will be very useful for planning surveys with NASA's upcoming Nancy Grace Roman Space Telescope (Roman, formerly WFIRST), which we use for example calculations throughout this work.
description: 16 pages, 6 figures, submitted to AJ. Comments welcome
Properties of optically selected BL Lac candidates from the SDSS
Creators: name: Kügler, S. D.
name: Nilsson, K.
name: Heidt, J.
name: Esser, J.
name: Schultz, T.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: \textbf{Context.} Deep optical surveys open the avenue for find large numbers of BL Lac objects that are hard to identify because they lack the unique properties classifying them as such. While radio or X-ray surveys typically reveal dozens of sources, recent compilations based on optical criteria alone have increased the number of BL Lac candidates considerably. However, these compilations are subject to biases and may contain a substantial number of contaminating sources. \textbf{Aims.} In this paper we extend our analysis of 182 optically selected BL Lac object candidates from the SDSS with respect to an earlier study. The main goal is to determine the number of bona fide BL Lac objects in this sample. \textbf{Methods.} We examine their variability characteristics, determine their broad-band radio-UV SEDs, and search for the presence of a host galaxy. In addition we present new optical spectra for 27 targets with improved S/N with respect to the SDSS spectra. \textbf{Results.} At least 59% of our targets have shown variability between SDSS DR2 and our observations by more than 0.1-0.27 mag de- pending on the telescope used. A host galaxy was detected in 36% of our targets. The host galaxy type and luminosities are consistent with earlier studies of BL Lac host galaxies. Simple fits to broad-band SEDS for 104 targets of our sample derived synchrotron peak frequencies between $13.5 \leq \mathrm{log}_{10}(ν_{\mathrm{peak}}) \leq 16$ with a peak at $\mathrm{log}_{10} \sim 14.5$. Our new optical spectra do not reveal any new redshift for any of our objects. Thus the sample contains a large number of bona fide BL Lac objects and seems to contain a substantial fraction of intermediate-frequency peaked BL Lacs.
description: Accepted for publication in A\&A
Generalized susceptibilities along the phase boundary of the three-dimensional, three-state Potts model
Creators: name: Pan, Xue
name: Xu, Mingmei
name: Wu, Yuanfang
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Through the Monte Carlo simulation of the three-dimensional, three-state Potts model, which is a paradigm of finite-temperature pure gauge QCD, we study the fluctuations of generalized susceptibilities near the temperatures of external fields of first-, second-order phase transitions and crossover. Similar peak-like fluctuation appears in the second order susceptibility at three given external fields. Oscillation-like fluctuation appears in the third and fourth order susceptibilities. We find that these non-monotonic fluctuations are not only associated with the second-order phase transition, but also the first-order one and crossover in a system of finite-size. We further present the finite-size scaling analysis of the second and fourth order susceptibilities, respectively. The exponent of the scaling characterizes the order of the transitions, or the crossover.
description: 9 pages, 5 figures
Saturated absorption technique used in Potassium microcell for magnetic field sensing
Creators: name: Sargsyan, Armen
name: Momier, Rodolphe
name: Leroy, Claude
name: Sarkisyan, David
Publisher: name: arXiv
Year: 2022
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: It is demonstrated that the use of a Micrometric Thin $^{39}$K vapor Cell (MTC) and Saturated Absorption spectroscopy (SA) allows to form narrow atomic lines in transmission spectrum without unwanted Cross-Over (CO) resonances. Another important feature is the small characteristic magnetic field value $B_0 = A_{hf}/μ_B$ of $^{39}$K, significantly smaller than for Rb and Cs. As a consequence, decoupling of $J$ and $I$ can be observed at relatively low magnetic fields $\sim$300 G, which results in the formation of two groups of four well-spectrally-resolved and equidistantly-positioned atomic transitions having the same amplitude (each group corresponds to a given circular polarization $σ^\pm$) which we record using a simple experimental setup with a linearly polarized tunable diode-laser and a longitudinal magnetic field obtained with two permanent magnets. Fabrication of a MTC is much easier than the fabrication of the $^{39}$K nanocells used in our previous works. A simple method to determine the magnitude of a wide range of B-fields with a spatial resolution of 30 $μ$m is presented, which is intrinsically calibrated and does not require a frequency reference.
description: 9 pages, 4 figures
Magnetic Fields in High-Mass Infrared Dark Clouds
Creators: name: Pillai, Thushara
name: Kauffmann, Jens
name: Tan, Jonathan C.
name: Goldsmith, Paul F.
name: Carey, Sean J.
name: Menten, Karl M.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: High-mass Stars are cosmic engines known to dominate the energetics in the Milky Way and other galaxies. However, their formation is still not well understood. Massive, cold, dense clouds, often appearing as Infrared Dark Clouds (IRDCs), are the nurseries of massive stars. No measurements of magnetic fields in IRDCs in a state prior to the onset of high-mass star formation (HMSF) have previously been available, and prevailing HMSF theories do not consider strong magnetic fields. Here, we report observations of magnetic fields in two of the most massive IRDCs in the Milky Way. We show that IRDCs G11.11-0.12 and G0.253+0.016 are strongly magnetized and that the strong magnetic field is as important as turbulence and gravity for HMSF. The main dense filament in G11.11-0.12 is perpendicular to the magnetic field, while the lower density filament merging onto the main filament is parallel to the magnetic field. The implied magnetic field is strong enough to suppress fragmentation sufficiently to allow HMSF. Other mechanisms reducing fragmentation, such as the entrapment of heating from young stars via high mass surface densities, are not required to facilitate HMSF.
description: Accepted to ApJ, 8 pages, 3 color figures
Lattice-Tuned Magnetism of Ru4+(4d4) Ions in Single-Crystals of the Layered Honeycomb Ruthenates: Li2RuO3 and Na2RuO3
Creators: name: Wang, J. C.
name: Terzic, J.
name: Qi, T. F.
name: Ye, Feng
name: Yuan, S. J.
name: Aswartham, S.
name: Streltsov, S. V.
name: Khomskii, D. I.
name: Kaul, R. K.
name: Cao, G.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We synthesize and study single crystals of the layered honeycomb lattice Mott insulators Na2RuO3 and Li2RuO3 with magnetic Ru4+(4d4) ions. The newly found Na2RuO3 features a nearly ideal honeycomb lattice and orders antiferromagnetically at 30 K. Single-crystals of Li2RuO3 adopt a honeycomb lattice with either C2/m or more distorted P21/m below 300 K, depending on detailed synthesis conditions. We find that Li2RuO3 in both structures hosts a well-defined magnetic state, in contrast to the singlet ground state found in polycrystalline Li2RuO3. A phase diagram generated based on our results uncovers a new, direct correlation between the magnetic ground state and basal-plane distortions in the honeycomb ruthenates.
description: 4 figures, accepted for publication in Phys. Rev. B
Calculating non-linear response functions for multi-dimensional electronic spectroscopy using dyadic non-Markovian quantum state diffusion
Creators: name: Chen, Lipeng
name: Bennett, Doran I. G.
name: Eisfeld, Alexander
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: We present a methodology for simulating multi-dimensional electronic spectra of molecular aggregates with coupling of electronic excitation to a structured environment using the stochastic non-Markovian quantum state diffusion (NMQSD) method in combination with perturbation theory for the response functions. A crucial aspect of our approach is that we propagate the NMQSD equation in a doubled system Hilbert space, but with the same noise. We demonstrate that our approach shows fast convergence with respect to the number of stochastic trajectories, providing a promising technique for numerical calculation of two-dimensional spectra of large molecular aggregates.
title: Ein Formular ist nicht genug
title: Vom Onlinezugangsgesetz zum digitalen Zertifikat
titleType: Subtitle
Creators: name: Keidel, Anke
name: Kulka-Peschke, Catharina
name: Pullwitt, Sabine
name: Battikh, Mohamed
name: Klemme, Markus
Publisher: name: Physikalisch-Technische Bundesanstalt (PTB)
Year: 2023
Subjects: Onlinezugangsgesetz (OZG)
Digitalisierung
Verwaltung
Dienstleistung
E-Service
E-Akte
digitale Zertifikate (DCC)
digitale Workflows

description: Das Onlinezugangsgesetz (OZG) mit seiner Fristsetzung Ende 2022 treibt die Digitalisierung der öffentlichen Verwaltung voran. Entscheidend für die erfolgreiche Digitalisierung von Verwaltungsprozessen ist, dass die eingereichten Aufträge, inklusive ihrer Unterlagen, medienbruchfrei weiterverarbeitet werden. Um eine weitreichende Digitalisierung und Optimierung von Verwaltungsprozessen zu erreichen, muss der gesamte Prozess, von der elektronischen Antragsstellung bis hin zu Bescheiderstellung, durchgängig digitalisiert werden. Die Physikalisch-Technische Bundesanstalt (PTB) hat sich dieser Herausforderung gestellt und erstellt maschinenlesbar Zertifikate, welche vom Kunden ohne Medienbruch weiterverwendet werden können. Dieses Whitepaper behandelt die unterschiedlichen Szenarien der digitalen Transformation von Verwaltungsprozessen, wie sie an der PTB bereits umgesetzt werden. Szenario 1 beschreibt die Umsetzung des OZG durch die Entwicklung des webbasierten Kundenportals „E-Service“, welches die medienbruchfreie Antragsstellung gewährleistet und darüber hinaus die gesamte Kommunikation zwischen Kunden und PTB ermöglicht. In Szenario 2 wird die digitale Transformation des gesamten nachfolgenden Bearbeitungsprozesses beschrieben. Die Schlüsselelemente zu einer erfolgreichen Digitalisierung sind Daten, Schnittstellen und Prozesse. Die Daten, die zur Erstellung eines digitalen Zertifikats erforderlich sind, werden über Schnittstellen medienbruchfrei im Prozess weitergereicht. Auf diese Weise wird ein optimierter Arbeitsprozess für die Umsetzung vollständig digitaler Workflows realisiert
Stirring the Base of the Solar Wind: On Heat Transfer and Vortex Formation
Creators: name: Finley, Adam J.
name: Brun, Sacha A.
name: Carlsson, Mats
name: Szydlarski, Mikolaj
name: Hansteen, Viggo
name: Shoda, Munehito
Publisher: name: arXiv
Year: 2022
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: Current models of the solar wind must approximate (or ignore) the small-scale dynamics within the solar atmosphere, however these are likely important in shaping the emerging wave-turbulence spectrum and ultimately heating/accelerating the coronal plasma. The Bifrost code produces realistic simulations of the solar atmosphere that facilitate the analysis of spatial and temporal scales which are currently at, or beyond, the limit of modern solar telescopes. For this study, the Bifrost simulation is configured to represent the solar atmosphere in a coronal hole region, from which the fast solar wind emerges. The simulation extends from the upper-convection zone (2.5 Mm below the photosphere) to the low-corona (14.5 Mm above the photosphere), with a horizontal extent of 24 Mm x 24 Mm. The twisting of the coronal magnetic field by photospheric flows, efficiently injects energy into the low-corona. Poynting fluxes of up to $2-4$ kWm$^{-2}$ are commonly observed inside twisted magnetic structures with diameters in the low-corona of 1 - 5 Mm. Torsional Alfvén waves are favourably transmitted along these structures, and will subsequently escape into the solar wind. However, reflections of these waves from the upper boundary condition make it difficult to unambiguously quantify the emerging Alfvén wave-energy flux. This study represents a first step in quantifying the conditions at the base of the solar wind using Bifrost simulations. It is shown that the coronal magnetic field is readily braided and twisted by photospheric flows. Temperature and density contrasts form between regions with active stirring motions and those without. Stronger whirlpool-like flows in the convection, concurrent with magnetic concentrations, launch torsional Alfvén waves up through the magnetic funnel network, which are expected to enhance the turbulent generation of magnetic switchbacks in the solar wind.
description: Accepted to A&A. 22 Pages + Appendix. 20 Figures + 5 Appendix Figures
Characterising motion types of G-band bright points in the quiet Sun
Creators: name: Yang, Yun-Fei
name: Qu, Hui-Xue
name: Ji, Kai-Fan
name: Feng, Song
name: Deng, Hui
name: Lin, Jia-Ben
name: Wang, Feng
Publisher: name: arXiv
Year: 2014
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We study the motions of G band bright points (GBPs) in the quiet Sun to obtain the characteristics of different motion types. A high resolution image sequence taken with the Hinode/Solar Optical Telescope (SOT) is used, and GBPs are automatically tracked by segmenting 3D evolutional structures in a space time cube. After putting the GBPs that do not move during their lifetimes aside, the non stationary GBPs are categorized into three types based on an index of motion type. Most GBPs that move in straight or nearly straight lines are categorized into a straight motion type, a few moving in rotary paths into a rotary motion, and the others fall into a motion type we called erratic. The mean horizontal velocity is 2.18 km/s, 1.63 km/s and 1.33 km/s for straight, erratic and rotary motion type, respectively. We find that a GBP drifts at a higher and constant velocity during its whole life if it moves in a straight line. However, it has a lower and variational velocity if it moves in a rotary path. The diffusive process is ballistic, super and sub diffusion for straight, erratic and rotary motion type, respectively. The corresponding diffusion index and coefficients are 2.13 and 850 km2/s, 1.82 and 331 km2/s, 0.73 and 13 km2/s. In terms of direction of motion, it is homogeneous and isotropical, and usually persists between neighbouring frames, no matter what motion type a GBP belongs to.
description: 13 pages, 9 figures
Bayesian data augmentation methods for the synthesis of qualitative and quantitative research findings
Creators: name: Sandelowski, Margarete
name: Voils, Corrine I.
name: Chang, YunKyung
name: Crandell, Jamie L.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2011

description: The possible utility of Bayesian methods for the synthesis of qualitative and quantitative research has been repeatedly suggested but insufficiently investigated. In this project, we developed and used a Bayesian method for synthesis, with the goal of identifying factors that influence adherence to HIV medication regimens. We investigated the effect of 10 factors on adherence. Recognizing that not all factors were examined in all studies, we considered standard methods for dealing with missing data and chose a Bayesian data augmentation method. We were able to summarize, rank, and compare the effects of each of the 10 factors on medication adherence. This is a promising methodological development in the synthesis of qualitative and quantitative research.
Moderate-Resolution $K$-Band Spectroscopy of the Substellar Companion VHS 1256 b
Creators: name: Hoch, Kielan K. W.
name: Konopacky, Quinn M.
name: Barman, Travis S.
name: Theissen, Christopher A.
name: Brock, Laci
name: Perrin, Marshall D.
name: Ruffio, Jean-Baptiste
name: Macintosh, Bruce
name: Marois, Christian
Publisher: name: arXiv
Year: 2022
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We present moderate-resolution ($R\sim4000$) $K$ band spectra of the planetary-mass companion VHS 1256 b. The data were taken with the OSIRIS integral field spectrograph at the W.M. Keck Observatory. The spectra reveal resolved molecular lines from H$_{2}$O and CO. The spectra are compared to custom $PHOENIX$ atmosphere model grids appropriate for young, substellar objects. We fit the data using a Markov Chain Monte Carlo forward modeling method. Using a combination of our moderate-resolution spectrum and low-resolution, broadband data from the literature, we derive an effective temperature of 1240 K, with a range of 1200--1300 K, a surface gravity of $\log{g}=$ 3.25, with a range of 3.25--3.75 and a cloud parameter of $\log P_{cloud}=$ 6, with a range of 6.0--6.6. These values are consistent with previous studies, regardless of the new, larger system distance from GAIA EDR3 (22.2$^{+1.1}_{-1.2}$ pc). We derive a C/O ratio of 0.590$_{-0.354}^{+0.280}$ for VHS 1256b. Both our OSIRIS data and spectra from the literature are best modeled when using a larger 3 $μ$m grain size for the clouds than used for hotter objects, consistent with other sources in the L/T transition region. VHS 1256 b offers an opportunity to look for systematics in the modeling process that may lead to the incorrect derivation of properties like C/O ratio in the high contrast regime.
description: 16 pages, 10 figures. arXiv admin note: text overlap with arXiv:2009.08959
Historical grand narratives of the Seven Kingdoms of Westeros: from invention to deconstruction of a traditional medieval historiography
Creators: name: Kyrchanoff Maksim W
Publisher: name: Журнал Фронтирных Исследований
Year: 2018
Subjects: GEORGE MARTIN
WESTEROS
SEVEN KINGDOMS
HISTORICAL IMAGINATION
NARRATIVES
FEUDALISM
POLITICAL RITUALS
ДЖОРДЖ МАРТИН
ВЕСТЕРОС
СЕМЬ КОРОЛЕВСТВ
ИСТОРИЧЕСКОЕ ВООБРАЖЕНИЕ
НАРРАТИВЫ
ФЕОДАЛИЗМ
ПОЛИТИЧЕСКИЕ РИТУАЛЫ

description: The article is focused on the problems of medieval images in modern mass culture in the contexts of simulation and imitation of grand historical narratives. The author analyses the text of "The World of Ice and Fire: the Untold History of the Westeros and the Game of Thrones" in the contexts of historical and political imaginations and the inventions of alternative identities. The author believes that medievalism lost its academic isolation because modern mass culture uses various images of the Middle Ages actively. Representatives and creators of mass culture use the achievements of academic medieval studies. The imagined universe of George Martin has real medieval prototypes. The author of the article, on the one hand, analyses the historical narratives of "The World of Ice and Fire: the Untold History of Westeros and the Game of Thrones" as an attempt to form historical and political memories. On the other hand, the problems of the features and type of Westeros feudalism are also analysed in this article.
The number of the maximal triangle-free graphs
Creators: name: Balogh, József
name: Petříčková, Šárka
Publisher: name: arXiv
Year: 2014
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05C35, 05C30, 05C69

description: Paul Erdős suggested the following problem: Determine or estimate the number of maximal triangle-free graphs on $n$ vertices. Here we show that the number of maximal triangle-free graphs is at most $2^{n^2/8+o(n^2)}$, which matches the previously known lower bound. Our proof uses among others the Ruzsa-Szemerédi triangle removal lemma, and recent results on characterizing of the structure of independent sets in hypergraphs.
description: 7 pages. This article is slightly different from the journal version, as it contains comments on more recent developments
In-work poverty in the European Union (II)
Creators: name: Ratti, Luca
name: Alhambra, Manuel Antonio Garcia-Muñoz
Publisher: name: Zenodo
Year: 2022
Subjects: in-work poverty; digitalisation; self-employed

description: This second Special Issue addresses two highly topical issues of EU law that are pivotal in the analysis of in-work poverty: on the one hand, the regulation of platform work at EU level and, on the other hand, the difficult question of collective bargaining for the self-employed in the EU.
Phase transitions and latent heat in magnetized matter
Creators: name: Pelicer, M. R.
name: Menezes, D. P.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Based on the assumption that the QCD phase diagram gives a realistic picture of hadronic and quark matter under different regimes, it is possible to claim that a quark core may be present inside compact objects commonly named hybrid neutron stars or even that a pure strange star may exist. In this work we explore how the phase transition is modified by the presence of strong magnetic fields and how it is impacted by parameters of the quark phase, for which we use the MIT-model with vector interactions. The phase transition is assumed to conserve flavor when hadrons turn into deconfined quarks. The hadronic equation of state is calculated with the NL3$ωρ^\ast$ parametrization of quantum hadrodynamics. We find that the magnetic field slightly reduces the pressure and chemical potential of the phase transition and the latent heat, the latter being very model dependent.
description: 10 pages, 5 figures, 2 tables
Improving safety on the front lines: the role of clinical microsystems
Creators: name: Mohr, J J
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2002

description: The clinical microsystem puts medical error and harm reduction into the broader context of safety and quality of care by providing a framework to assess and evaluate the structure, process, and outcomes of care. Eight characteristics of clinical microsystems emerged from a qualitative analysis of interviews with representatives from 43 microsystems across North America. These characteristics were used to develop a tool for assessing the function of microsystems. Further research is needed to assess microsystem performance, outcomes, and safety, and how to replicate "best practices" in other settings.
Probing the Antisymmetric Fano Interference Assisted by a Majorana Fermion
Creators: name: Dessotti, F. A.
name: Ricco, L. S.
name: de Souza, M.
name: Souza, F. M.
name: Seridonio, A. C.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: As the Fano effect is an interference phenomenon where tunneling paths compete for the electronic transport, it becomes a probe to catch fingerprints of Majorana fermions lying on condensed matter systems. In this work we benefit of this mechanism by proposing as a route for that an Aharonov-Bohm-like interferometer composed by two quantum dots, being one of them coupled to a Majorana bound state, which is attached to one of the edges of a semi-infinite Kitaev wire within the topological phase. By changing the Fermi energy of the leads and the symmetric detuning of the levels for the dots, we show that opposing Fano regimes result in a transmittance characterized by distinct conducting and insulating regions, which are fingerprints of an isolated Majorana quasiparticle. Furthermore, we show that the maximum fluctuation of the transmittance as a function of the detuning is half for a semi-infinite wire, while it corresponds to the unity for a finite system. The setup proposed here constitutes an alternative experimental tool to detect Majorana excitations.
description: Featured article: cover of the Journal of Applied Physics 116, 17 (2014)
The white tsar and his "unfaithful" subjects: intercultural diplomacies on Russia''s Asian frontier
Creators: name: Khodarkovsky Michael
Publisher: name: Журнал Фронтирных Исследований
Year: 2018
Subjects: FRONTIER
RUSSIA
CAUCUSES
DIPLOMACY
INTERCULTURAL DIALOGUE
COLONIAL ADMINISTRATION
ФРОНТИР
РОССИЯ
КАВКАЗ
ДИПЛОМАТИЯ
МЕЖКУЛЬТУРНЫЙ ДИАЛОГ
КОЛОНИАЛЬНАЯ АДМИНИСТРАЦИЯ

description: What is Russia? Is it “a riddle wrapped in a mystery” as the British Prime Minister Winston Churchill famously described it? A state driven by “messianic expansionism” according to the Nobel Peace Prize winner Andrei Sakharov? A civilization stuck between apocalypse and revolution in the words of the 20th century Russian philosopher Nikolai Berdyaev? Or is it simply a space defined by its vast size, imperial ideology, intertwined cultures, and co-habiting civilizations? This paper examines how a Russian government approached and conceptualized its relationship with various non-Russian peoples during Russia’s relentless expansion along the southern and eastern frontiers. Throughout the centuries, Russia’s paramount concerns remained geopolitical rather than commercial. From the outset, Russian authorities insisted on the non-Russians’ subordinate political status codified through diplomatic means. Indigenous peoples, however, perceived their relationship with Russia through the prism of their own societies, which exhibited significant structural differences with that of the Russian state. Perceiving the native peoples through a set of distorted mirrors and its own rigid ideology, Russian authorities consistently denied a colonial nature of what was, in fact, Russia’s colonial empire. Inevitably, however, the rise of ethnic and national identities among the non-Russian peoples within the empire pulled down the very imperial structures that helped to create them.
Elliptical and Purely NS Superstrata
Creators: name: Ganchev, Bogdan
name: Houppe, Anthony
name: Warner, Nicholas P.
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We analyze the BPS equations in the ``superstratum sector'' of three-dimensional gauged supergravity. We obtain multi-parameter supersymmetric solutions that include elliptical deformations of the supertubes that underlie standard superstrata. We uplift the three-dimensional solutions to obtain the corresponding six-dimensional geometries. This yields new families of elliptically-deformed, ambi-bolar hyper-Kähler geometries in four dimensions with a non-tri-holomorphic $U(1)$ isometry. We also find a new family of scaling superstrata whose S-dual lives entirely within the NS-sector of supergravity, and will thus be more amenable to exact analysis using string probes. In all these new superstrata, including the scaling ones, if the momentum charge is non-zero we find that the ellipse stays away from the degeneration locus in which the ellipse becomes flat.
description: 37 pages, 4 figures
RKKY interaction in bilayer graphene
Creators: name: Mohammadi, Yawar
name: Moradian, Rostam
Publisher: name: arXiv
Year: 2014
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We study the RKKY interaction between two magnetic impurities located on same layer (intralayer case) or on different layers (interlayer case) in undoped bilayer graphene in the four-bands model, by directly calculating the Green functions in the eigenvalues and eigenvectors representation. Our results show that both intra- and interlayer RKKY interactions between two magnetic impurities located on same (opposite) sublattice are always ferromagnetic (antiferromagnetic). Furthermore we find unusual long-distance decay of the RKKY interaction in BLG. The intralyer RKKY interactions between two magnetic impurities located on same sublattice, $J^{A_{n}A_{n}}(\mathbf{R})$ and $J^{B_{n}B_{n}}(\mathbf{R)}$, decay closely as $1/R^{6}$ and $1/R^{2}$ at large impurity distances respectively, but when they are located on opposite sublattices the RKKY interactions exhibit $1/R^{4}$ decays approximately. In the interlayer case, the RKKY interactions between two magnetic impurities located on same sublattice show a decay close to $1/R^{4}$ at large impurity distances, but if two magnetic impurities be on opposite sublattices the RKKY interactions, $J^{A_{1}B_{2}}(\mathbf{R})$ and $J^{B_{1}A_{2}}(\mathbf{R)}$, decay closely as $1/R^{6}$ and $1/R^{2}$ respectively. Both intra- and interlayer RKKY interactions have anisotropic oscillatory factors which for intralayer case is equal to that for single layer graphene. Our results at weak and strong interlayer coupling limits reduce to the RKKY interaction of SLG and that of BLG in the two-bands approximation respectively.
description: 28 pages, 7 figures
Quality or financing: what drives design of the health care system?
Creators: name: McLoughlin, V
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2003

description: The scope and scale of problems in the quality of health service provision have been increasingly recognised in recent years. Policy and planning for financing are usually concerned with how funding is made available and allocated, rather than with what is being achieved, including the quality of health services delivered. A fundamental challenge is how to improve the delivery of health services to achieve improved patient outcomes and to optimize financial outcomes. To accomplish this it is essential that the debates on quality of care and financing are aligned. Approaches to improving the quality of care are drawn from Australia, the US, and the UK. Financing arrangments for care at a national level have a bearing on how payment incentives can be used to promote or impede quality. The level of overall expenditure is obviously important, as are the mechanisms for payment. Long term programs to build knowledge, standardise processes, provide credible performance data and foster accountability are required to ensure that further investments lead to improvement in care.
Cognitive interviewing in the evaluation of fatigue items: Results from the patient-reported outcomes measurement information system (PROMIS)
Creators: name: Rothrock, Nan
name: Christodoulou, Christopher
name: DeWalt, Darren A.
name: Junghaenel, Doerte U.
name: Stone, Arthur A.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2008

description: Cognitive Interviewing (CI) is a technique increasingly used to obtain respondent feedback on potential items during questionnaire development. No standard guidelines exist by which to incorporate CI feedback in deciding to retain, revise, or eliminate potential items. We used CI in developing fatigue items for the National Institutes of Health (NIH) Patient-Reported Outcomes Measurement Information System (PROMIS) Roadmap initiative. Our aims were to describe the CI process, formally evaluate the utility of decisions made on the basis of CI, and offer suggestions for future research.
Combined exercise during type 2 diabetes: modulation of myocardium metaflammation of male rats
Creators: name: pourfarzad, Kambiz
name: Soori, Rahman
name: HAMEDCHAMAN, NADER
name: Karami, Esmail
name: Riahy, Simin
Publisher: name: figshare
Year: 2023
Subjects: Exercise physiology

description: Abstract Objectives: The aim of this study was to investigate the effect of 8 weeks of combined training (endurance and resistance) on the amount of NLRP3, CASPASE-1 and IL-1β proteins in the cardiac tissue of type 2 diabetic male rats. Methods: 21 male Wistar rats were randomly divided into Healthy Control (C), Diabetic Control (D) and Diabetic with Combined Training (D+COT). After the induction of diabetes, the animals performed combined training for 8 weeks. 48 hours after final session protein expression levels of NLRP3, caspase-1 and IL-1β were assessed by Western blot and Eliza techniques from myocardium. Results: The findings showed that the levels of NLRP-3, caspase-1 and IL-1β proteins in the cardiac tissue of the exercise group were significantly decreased in comparison with the diabetic group (P < 0.05). Conclusion: Combined training (endurance-resistance) can reduce the risk factors associated with DCM in the myocardium of type 2 diabetic rats.
Sperner type lemma for quadrangulations
Creators: name: Musin, Oleg R.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Combinatorics (math.CO)
subject: Metric Geometry (math.MG)
subject: FOS: Mathematics

description: Sperner's lemma states that every Sperner coloring of a triangulation of a simplex contains a fully colored simplex. We present a generalization of this lemma, where instead of triangulations are considered quadrangulations.
description: 8 pages, 2 figures. arXiv admin note: text overlap with arXiv:1405.7513
The merger fraction of post-starburst galaxies in UNIONS
Creators: name: Wilkinson, Scott
name: Ellison, Sara L.
name: Bottrell, Connor
name: Bickley, Robert W.
name: Gwyn, Stephen
name: Cuillandre, Jean-Charles
name: Wild, Vivienne
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Post-starburst (PSB) galaxies are defined as having experienced a recent burst of star formation, followed by a prompt truncation in further activity. Identifying the mechanism(s) causing a galaxy to experience a post-starburst phase therefore provides integral insight into the causes of rapid quenching. Galaxy mergers have long been proposed as a possible post-starburst trigger. Effectively testing this hypothesis requires a large spectroscopic galaxy survey to identify the rare PSBs as well as high quality imaging and robust morphology metrics to identify mergers. We bring together these critical elements by selecting PSBs from the overlap of the Sloan Digital Sky Survey and the Canada-France Imaging Survey and applying a suite of classification methods: non-parametric morphology metrics such as asymmetry and Gini-M20, a convolutional neural network trained to identify post-merger galaxies, and visual classification. This work is therefore the largest and most comprehensive assessment of the merger fraction of PSBs to date. We find that the merger fraction of PSBs ranges from 19% to 42% depending on the merger identification method and details of the PSB sample selection. These merger fractions represent an excess of 3-46x relative to non-PSB control samples. Our results demonstrate that mergers play a significant role in generating PSBs, but that other mechanisms are also required. However, applying our merger identification metrics to known post-mergers in the IllustrisTNG simulation shows that ~70% of recent post-mergers (<200 Myr) would not be detected. Thus, we cannot exclude the possibility that nearly all post-starburst galaxies have undergone a merger in their recent past.
description: 21 pages, 16 figures
Content validity in the PROMIS social-health domain: a qualitative analysis of focus-group data
Creators: name: Hahn, Elizabeth A.
name: DeVellis, Robert F.
name: Morse, Jennifer
name: Bosworth, Hayden B.
name: Irwin, Debra E.
name: Stover, Angela
name: Williams, Kelly A.
name: Kelly, Morgen A. R.
name: Castel, Liana D.
name: Eisen, Susan V.
name: DeWalt, Darren A.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2008

description: Our aim was to assess the content validity of the Patient-Reported Outcomes Measurement Information System (PROMIS) social health item banks by comparing a prespecified conceptual model with concepts that focus-group participants identified as important social-health-related outcomes. These data will inform the process of improving health-related quality-of-life measures.
The use of focus groups in the development of the PROMIS pediatrics item bank
Creators: name: Walsh, Tasanee R.
name: Meier, Andrea
name: DeWalt, Darren A.
name: Irwin, Debra E.
name: Varni, James W.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2008

description: To understand differences in perceptions of patient reported outcome domains between children with asthma and children from the general population. We used this information in the development of patient-reported outcome items for the Patient Reported Outcomes Measurement Information System Pediatrics project.
Nature of excitons in PPDT2FBT: PCBM solar cell: Role played by PCBM
Creators: name: Sahoo, Subhamoy
name: Barah, Dhruvajyoti
name: S, Dinesh Kumar
name: Xavier, Nithin
name: Dutta, Soumya
name: Ray, Debdutta
name: Bhattacharyya, Jayeeta
Publisher: name: arXiv
Year: 2022
Subjects: subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: In organic semiconductor based bulk heterojunction solar cells, the presence of acceptor increases the formation of charge transfer (CT) excitons, thereby leading to higher exciton dissociation probabilities. In this work we used steady state EA measurements to probe the change in the nature of excitons as the blend composition of the solar cell active layer material is varied. We investigated blends of poly[(2,5-bis(2-hexyldecyloxy)phenylene)-alt-(5,6-difluoro-4,7-di(thiophen-2-yl)benzo[c]-[1,2,5]thiadiazole)] (PPDT2FBT) and (6,6)-Phenyl C71 butyric acid methyl ester (PCBM). Analysis of the EA spectra showed that in presence of fullerene based acceptor, like PCBM, CT characteristics of the excitons were modified, though, no new CT signature was observed in the blend. Enhancement in the CT characteristic in the blend was reflected in the photoluminescence (PL) measurements of the blends, where, PL quenching of $\sim$ 63\% was observed for 1\% PCBM. The quenching reaches saturation at about 20\% PCBM. However, the maximum efficiency of the devices was obtained for the blend having 50\% PCBM. Comparing experimental results with simulations, the variation of the device efficiency with PCBM percentage was shown to be arising from multiple factors like increase in polarizability and dipole moment of excitons, and the efficiency of the carrier collection from the bulk of the active layer.