cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Resolving the Origin of the Diffuse Soft X-ray Background
Creators: name: Smith, Randall K.
name: Foster, Adam R.
name: Edgar, Richard J.
name: Brickhouse, Nancy S.
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The ubiquitous diffuse soft (1/4 keV) X-ray background was one of the earliest discoveries of X-ray astronomy. At least some of the emission may arise from charge exchange between solar wind ions and neutral atoms in the heliosphere, but no detailed models have been fit to the available data. Here we report on a new model for charge exchange in the solar wind, which when combined with a diffuse hot plasma component filling the Local Cavity provides a good fit to the only available high-resolution soft X-ray and extreme ultraviolet (EUV) spectra using plausible parameters for the solar wind. The implied hot plasma component is in pressure equilibrium with the local cloud that surrounds the solar system, creating for the first time a self-consistent picture of the local interstellar medium.
description: 6 pages, 4 figures
Systematic Broad-band X-ray Study of super-Eddington Accretion onto Supermassive Black Holes. I. X-ray Continuum
Creators: name: Tortosa, Alessia
name: Ricci, Claudio
name: Ho, Luis C.
name: Tombesi, Francesco
name: Du, Pu
name: Inayoshi, Kohei
name: Wang, Jian-Min
name: Shangguan, Jinyi
name: Li, Ruancun
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present the first systematic broad-band X-ray study of super-Eddington accretion onto SMBHs with simultaneous {\it NuSTAR} and {\it XMM-Newton} or {\it Swift}/XRT observations of a sample of 8 super-Eddington accreting AGN with Eddington ratio $1<λ_{\rm Edd}<426$. We find that the SEAMBHs show a steep primary continuum slope as expected for sources accreting in the super Eddington regime, mostly dominated by relativistic reflection. The Iron K$α$ emission lines of the sources of our sample show relativistic broadening. In addition the equivalent widths of the narrow components of the Iron K$α$ lines follow the 'X-ray Baldwin' effect, also known as the 'Iwasawa-Taniguchi' effect. We found a statistically significant correlation between the photon-index of the primary power-law and the Eddington ratio, consistent with past studies. Moreover, as expected for super-Eddington sources, the median value of the reflection fraction of the sources we analysed is a factor $\sim 2$ higher than the median reflection fraction value of the type\,1 AGN from the BASS sample. We are able to estimate the coronal temperature for three sources of our sample: Mrk\,382 ($kT_e=7.8$\,keV), PG\,0026+129 ($kT_e=39$\,keV) and IRAS\,04416+1215 ($kT_e=3$\,keV). Looking at the position of the SEAMBHs sources of our sample in the compactness-temperature diagram it appears that in super-Eddington AGN, as for lower Eddington ratio AGN, the X-ray corona is controlled by pair production and annihilation.
description: Accepted for publication in Monthly Notices of the Royal Astronomical Society
Characterization of Excited States in Time-Dependent Density Functional Theory Using Localized Molecular Orbitals
Creators: name: Sen, Souloke
name: Senjean, Bruno
name: Visscher, Lucas
Publisher: name: arXiv
Year: 2022
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: Localized molecular orbitals are often used for the analysis of chemical bonds, but they can also serve to efficiently and comprehensibly compute linear response properties. While conventional canonical molecular orbitals provide an adequate basis for the treatment of excited states, a chemically meaningful identification of the different excited-state processes is difficult within such a delocalized orbital basis. In this work, starting from an initial set of supermolecular canonical molecular orbitals, we provide a simple one-step top-down embedding procedure for generating a set of orbitals which are localized in terms of the supermolecule, but delocalized over each subsystem composing the supermolecule. Using an orbital partitioning scheme based on such sets of localized orbitals, we further present a procedure for the construction of local excitations and charge-transfer states within the linear response framework of time-dependent density functional theory (TDDFT). This procedure provides direct access to approximate diabatic excitation energies and, under the Tamm--Dancoff approximation, also their corresponding electronic couplings -- quantities that are of primary importance in modelling energy transfer processes in complex biological systems. Our approach is compared with a recently developed diabatization procedure based on subsystem TDDFT using projection operators, which leads to a similar set of working equations. Although both of these methods differ in the general localization strategies adopted and the type of basis functions (Slaters vs. Gaussians) employed, an overall decent agreement is obtained.
Polymeric aerogels
Creators: name: Longo, Simona
Publisher: name: Universita degli studi di Salerno
Year: 2014
Subjects: subject: CHIM/04 CHIMICA INDUSTRIALE
subject: Crystalline phase
subject: Aerogels
subject: Nanoporous

description: 2012 - 2013
description: Aerogels are a unique class of materials characterized by a highly porous network, being attractive for many applications such as thermal and acoustic insulation, capacitors or catalysis. In more recent years, polymeric aerogels based on thermoplastic uncrosslinked polymers, where the knots of the three-dimensional networks are physical, not formed by covalent chemical bonds but by small crystallites, have been obtained. These physically cross-linked aerogels are generally prepared by supercritical CO2 extraction of thermoreversible organogels. Besides aerogels, another class of porous materials, which has received attention in the last decade by the scientific community, is constituted by semicrystalline thermoplastic polymers whose crystalline phase is nanoporous, i.e. presents a density lower than the corresponding amorphous phase. In this thesis monolithic aerogels, where the crystallites that constitute the physical knots exhibit a nanoporous-crystalline form have been prepared for polymer that exhibit a nanoporous crystalline phase e.g. syndiotactic polystyrene (s-PS) and poly(2,6-dimethyl-1,4-phenylene)oxide (PPO).[2c] Physically cross-linked aerogels have also been prepared for poly(2,6-diphenyl-1,4-phenylene oxide) (PPPO), that does not exhibit a nanoporous crystalline phase, but a highly absorbent amorphous phase.[2d] Moreover the preparation of aerogels of polyethylene, is described. The fast kinetics and high sorption capacity of VOCs by aerogels, as well as their good handling characteristics, make these new materials particularly suitable as a sorption medium to remove selectively traces of pollutants from water and air. Furthermore nanocomposites aerogels, with large amounts of both intercalated and exfoliated organically modified montmorillonite (OMMT) and including the nanoporous-crystalline δ form of s-PS, were prepared. Also for high OMMT content, the aerogel preparation procedures occur without re-aggregation of the exfoliated clay, which is instead observed for other kinds of polymer processing. Analogous aerogels were prepared with graphene oxide (GO) leading to complete GO exfoliation as well as its substantial reduction. The most important result is that the aerogel preparation allows the inclusion of also large amount of nanofillers, without aggregation, at least up to a content of 20 wt%. This allows to improve mechanical and electrical properties of the nanoporous-crystalline aerogels of s-PS. Composite aerogels exhibiting large nanofiller content, can be also used as masterbatches for polymer composites. [edited by Author]
Impact of MgII interstellar medium absorption on near-ultraviolet exoplanet transit measurements
Creators: name: Sreejith, A. G.
name: Fossati, L.
name: Cubillos, P. E.
name: Ambily, S.
name: France, K.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Ultraviolet (UV) transmission spectroscopy probes atmospheric escape, which has a significant impact on planetary atmospheric evolution. If unaccounted for, interstellar medium absorption (ISM) at the position of specific UV lines might bias transit depth measurements, and thus potentially affect the (non-)detection of features in transmission spectra. Ultimately, this is connected to the so called ``resolution-linked bias'' (RLB) effect. We present a parametric study quantifying the impact of unresolved or unconsidered ISM absorption in transit depth measurements at the position of the MgII h&k resonance lines (i.e. 2802.705 Å and 2795.528 Å respectively) in the near-ultraviolet spectral range. We consider main-sequence stars of different spectral types and vary the shape and amount of chromospheric emission, ISM absorption, and planetary absorption, as well as their relative velocities. We also evaluate the role played by integration bin and spectral resolution. We present an open-source tool enabling one to quantify the impact of unresolved or unconsidered MgII ISM absorption in transit depth measurements. We further apply this tool to a few already or soon to be observed systems. On average, we find that ignoring ISM absorption leads to biases in the MgII transit depth measurements comparable to the uncertainties obtained from the observations published to date. However, considering the bias induced by ISM absorption might become necessary when analysing observations obtained with the next generation space telescopes with UV coverage (e.g. LUVOIR, HABEX), which will provide transmission spectra with significantly smaller uncertainties compared to what obtained with current facilities (e.g. HST).
description: Accepted for publication in MNRAS
Classifying representations by way of Grassmannians
Creators: name: Huisgen-Zimmermann, Birge
Publisher: name: arXiv
Year: 2014
Subjects: subject: Representation Theory (math.RT)
subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics
subject: 16G10, 14D20, 14D22, 16G20

description: Let $Λ$ be a finite dimensional algebra over an algebraically closed field. Criteria are given which characterize existence of a fine or coarse moduli space classifying, up to isomorphism, the representations of $Λ$ with fixed dimension $d$ and fixed squarefree top $T$. Next to providing a complete theoretical picture, some of these equivalent conditions are readily checkable from quiver and relations. In case of existence of a moduli space -- unexpectedly frequent in light of the stringency of fine classification -- this space is always projective and, in fact, arises as a closed subvariety ${\mathfrak{Grass}}^T_d$ of a classical Grassmannian. Even when the full moduli problem fails to be solvable, the variety ${\mathfrak{Grass}}^T_d$ is seen to have distinctive properties recommending it as a substitute for a moduli space. As an application, a characterization of the algebras having only finitely many representations with fixed simple top is obtained; in this case of `finite local representation type at a given simple $T$', the radical layering $\bigl( J^lM/ J^{l+1}M \bigr)_{l \ge 0}$ is shown to be a classifying invariant for the modules with top $T$. This relies on the following general fact obtained as a byproduct: Proper degenerations of a local module $M$ never have the same radical layering as $M$.
MPEC 2023-R30 : 2023 RL
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2023
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: 2023 RL

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Unconventional localization of electrons inside of a nematic electronic phase
Creators: name: Farrar, L.
name: Zajicek, Z.
name: Morfoot, A. B.
name: Bristow, M.
name: Humphries, O. S.
name: Haghighirad, A. A.
name: McCollam, A.
name: Bending, S. J.
name: Coldea, A. I.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The magnetotransport behaviour inside the nematic phase of bulk FeSe reveals unusual multiband effects that cannot be reconciled with a simple two-band approximation proposed by surface-sensitive spectroscopic probes. In order to understand the role played by the multiband electronic structure and the degree of two-dimensionality we have investigated the electronic properties of exfoliated flakes of FeSe by reducing their thickness. Based on magnetotransport and Hall resistivity measurements, we assess the mobility spectrum that suggests an unusual asymmetry between the mobilities of the electrons and holes with the electron carriers becoming localized inside the nematic phase. Quantum oscillations in magnetic fields up to 38 T indicate the presence of a hole-like quasiparticle with a lighter effective mass and a quantum scattering time three times shorter, as compared with bulk FeSe. The observed localization of negative charge carriers by reducing dimensionality can be driven by orbitally-dependent correlation effects, enhanced interband spin-fluctuations or a Lifshitz-like transition which affect mainly the electron bands. The electronic localization leads to a fragile two-dimensional superconductivity in thin flakes of FeSe, in contrast to the two-dimensional high-Tc induced with electron doping via dosing or using a suitable interface.
description: 22 pages, 14 figures
Effects of scented personal care products on ozone reactivity with human building occupants
Creators: name: Fritz, Hagen Earl
Publisher: name: The University of Texas at Austin
Year: 2018
Subjects: Terpenes
Air exchange rate
Deposition velocity

description: The concentration of ground-level ozone in many cities is projected to increase in the coming years. The greater the concentration of ground-level ozone, the more ozone will enter building spaces through infiltration and ventilation. Once indoors, ozone reacts with other gas-phase pollutants, building materials, and human skin lipids. Studies in portable classrooms suggest that reactions between ozone and human skin lipids contribute more to the overall reduction in bulk indoor ozone concentration than previous research indicates. We hypothesize that the increased ozone uptake to occupants is due to the prevalence of body sprays like colognes and perfumes noted during field measurements in high school classrooms. Cleaning products, air fresheners, body sprays, and deodorants contain high concentrations of unsaturated volatile organic compounds called terpenes because terpenes, which are known for their pleasant-smelling fragrances. Ozone is a respiratory irritant and known asthmagen, but by-products from ozone/terpene reactions can be potentially more harmful. Terpenes, along with molecules present on indoor furnishings and human skin lipids, represent major sinks for indoor ozone. In this study, the terpene compositions of multiple, common male body sprays are characterized. From this analysis, one particular body spray was chosen based on the concentration of terpene and terpene-related species it contained. The body spray's effects on the ozone deposition velocity to cotton clothing and human subjects was tested in a stainless steel environmental chamber by comparing the steady-state ozone concentrations with and without the body spray applied. The average ozone deposition velocity to humans without the body spray applied was found to be 16.2 m/s. When the body spray was applied, the value actually decreased to 14.7 m/s. This research shows that scented body sprays might not noticeably alter clothing's or a person's reactivity with ozone. However, results from portable classrooms and a test chamber indicate that humans might be more reactive in the presence of ozone than previous studies have found, particularly at higher AERs that reduce transport resistance for ozone interactions with humans in indoor spaces
Reliable and efficient a posteriori error estimation for adaptive IGA boundary element methods for weakly-singular integral equations
Creators: name: Feischl, Michael
name: Gantner, Gregor
name: Praetorius, Dirk
Publisher: name: arXiv
Year: 2014
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: We consider the Galerkin boundary element method (BEM) for weakly-singular integral equations of the first-kind in 2D. We analyze some residual-type a posteriori error estimator which provides a lower as well as an upper bound for the unknown Galerkin BEM error. The required assumptions are weak and allow for piecewise smooth parametrizations of the boundary, local mesh-refinement, and related standard piecewise polynomials as well as NURBS. In particular, our analysis gives a first contribution to adaptive BEM in the frame of isogeometric analysis (IGABEM), for which we formulate an adaptive algorithm which steers the local mesh-refinement and the multiplicity of the knots. Numerical experiments underline the theoretical findings and show that the proposed adaptive strategy leads to optimal convergence.
Medium effects and the shear viscosity of the dilute Fermi gas away from the conformal limit
Creators: name: Bluhm, Marcus
name: Schaefer, Thomas
Publisher: name: arXiv
Year: 2014
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We study the shear viscosity of a dilute Fermi gas as a function of the scattering length in the vicinity of the unitarity limit. The calculation is based on kinetic theory, which provides a systematic approach to transport properties in the limit in which the fugacity $z=nλ^3/2$ is small. Here, $n$ is the density of the gas and $λ$ is the thermal wave length of the fermions. At leading order in the fugacity expansion the shear viscosity is independent of density, and the minimum shear viscosity is achieved at unitarity. At the next order medium effects modify the scattering amplitude as well as the quasi-particle energy and velocity. We show that these effects shift the minimum of the shear viscosity to the Bose-Einstein condensation (BEC) side of the resonance, in agreement with the result of recent experiments.
description: Oct 10, 2014. 17 pp
AGN cool feedback and analogy with X-ray binaries: from radiation pressure to cosmic ray driven outflows
Creators: name: Ishibashi, W.
name: Fabian, A. C.
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Cool outflows are now commonly observed in galaxies, but their physical origin and driving mechanism remain unclear. Active galactic nucleus (AGN) feedback can potentially accelerate cool galactic outflows via cosmic rays (CR) and radiation pressure on dust. Here we investigate the relative importance of CR and radiation feedback in AGNs, and we analyse the physical conditions for outflow launching as a function of the black hole accretion flow mode. We assume CRs from AGN jet origin and consider the analogy with Galactic X-ray binaries, whereby the jet is prominent at low accretion rates (hard state) and quenched at high accretion rates (soft state). We show that CR-driven outflows can be powered at low accretion rates and at large radii, whereas radiation pressure-driven outflows dominate at high accretion rates and small radii. Thus the two AGN feedback mechanisms -- CRs and radiation pressure on dust -- may play complementary roles in driving cool outflows on galactic scales. The transition from radiation pressure-driven outflows at higher accretion rates to CR-driven outflows at lower accretion rates likely corresponds to a transition in the underlying accretion flow modes (from a radiatively efficient accretion disc to a radiatively inefficient jet-dominated flow) over cosmic time.
description: MNRAS, in press
Single-shot 3D sensing with improved data density
Creators: name: Willomitzer, Florian
name: Ettl, Svenja
name: Faber, Christian
name: Häusler, Gerd
Publisher: name: arXiv
Year: 2014
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We introduce a novel concept for motion robust optical 3D-sensing. The concept is based on multi-line triangulation. The aim is to evaluate a large number of projected lines (high data density) in a large measurement volume with high precision. Implementing all those three attributes at the same time allows for the "perfect" real-time 3D movie camera (our long term goal). The key problem towards this goal is ambiguous line indexing: we will demonstrate that the necessary information for unique line indexing can be acquired by two synchronized cameras and a back projection scheme. The introduced concept preserves high lateral resolution, since the lines are as narrow as the sampling theorem allows, no spatial bandwidth is consumed by encoding of the lines. In principle, the distance uncertainty is only limited by shot noise and coherent noise. The concept can be also advantageously implemented with a hand-guided sensor and real-time registration, for a complete and dense 3D-acquisition of complicated scenes.
Impoliteness in Iraqi Arabic
Creators: name: Aziz, Niaz Muhsin
name: 0000-0004-1936-9924
Publisher: name: The University of Texas at Austin
Year: 2018
Subjects: Impoliteness
Iraqi Arabic
Usuul

description: This dissertation concerns impoliteness in Iraqi Arabic. It investigates the moral concept of Usuul as used by speakers of Iraqi Arabic in everyday interaction. It applies the analytical concepts developed in the literature of ethnomethodology and conversation analysis to impoliteness in Iraqi candid camera programs. First, it describes the participants’ conceptualization of Usuul according to their discursive negotiations in interaction. Then the study illustrates, through extensive examples, how pranksters invoke social norms of Usuul. I argue that the moral negotiations associated with Usuul are dynamic and unfold by degrees over the course of a conversation. Finally, the study shows that candid camera television shows can be utilized to examine the moral and cultural dimensions of everyday interaction
Searches for Extremely Metal Poor Galaxies using ALFALFA-selected Dwarf Galaxies
Creators: name: Miller, John H.
name: Salzer, John J.
name: Janowiecki, Steven
name: Haynes, Martha P.
name: Hirschauer, Alec S.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present a study of nearby dwarf galaxies selected from the ALFALFA blind HI survey. A primary goal of the project was to utilize a non-standard selection method with the hope of detecting previously unrecognized extremely metal-poor (XMP) galaxies. The study was motivated by the recent discovery of two XMP galaxies $-$ Leo P and Leoncino $-$ which were both originally found via the ALFALFA survey. We have obtained narrowband H$α$ images for 42 dwarf systems, many of which are located in the local void in front of the Pisces-Perseus Supercluster. Spectra for eleven of the best candidates resulted in the determination of metal abundances for ten of the systems. None were found to be extremely metal poor, although one system (AGC 123350) was found to have an oxygen abundance of log(O/H)+12 = 7.46, or $\sim$6\% solar. One of the galaxies in our sample exhibits a high oxygen abundance for its luminosity, suggesting the possibility that it may have a tidal origin.
description: 21 pages, 11 figures, 4 tables
Data-integrated executable publications for reproducible geohazards research
Creators: name: Yildiz, Anil
name: Kowalski, Julia
Publisher: name: RWTH Aachen University
Year: 2023

description: Abstracts & presentations / EGU General Assembly 2023 EGU General Assembly 2023, EGU 2023, Vienna, Austria, 23 Apr 2023 - 28 Apr 2023; Göttingen : Copernicus Gesellschaft mbH EGU23-7417, 1 Seite (2023). doi:10.5194/egusphere-egu23-7417
description: Published by Copernicus Gesellschaft mbH, Göttingen
Engineering human autoimmune T cell receptors towards the development of a cellular therapy for multiple sclerosis
Creators: name: Leonard, Elissa Kathleen
name: 0000-0001-7757-895X
Publisher: name: The University of Texas at Austin
Year: 2018
Subjects: T cell receptor
TCR
Multiple sclerosis
MS
Protein engineering
T cell engineering
T regulatory cells
Cellular therapeutics
Autoimmunity
Yeast display
T cell activation

description: Multiple sclerosis (MS) is a debilitating neurodegenerative autoimmune disorder caused by autoreactive T cells that recognize and initiate immune attack of the myelin sheath that protects neurons of the central nervous system. Over time, this results in scarring or destruction of the affected tissue, and cerebellar atrophy. Existing therapies are mostly non-specifically immunosuppressive or immunomodulatory, and all fail to fully prevent progression of the disease. T regulatory cells, whose function is impaired in MS patients, show great promise as a therapeutic target and as a cellular therapy, as their immunosuppressive activity is specifically targeted based on the identity of their T cell receptor (TCR). The one remaining obstacle in developing Treg cellular therapies for MS and other autoimmune diseases is engineering the TCR to give these cells optimal specificity and suppressive activity. Few, if any, human autoimmune TCRs have been successfully engineered, largely because most autoimmune TCRs, especially those observed in MS, show atypical and unstable binding of antigen compared to more common pathogen-specific TCRs, and thus are very challenging to work with. A unique yeast display system was developed in order to generate variants of an MS TCR with more stable binding of their cognate antigen. These variants showed enhanced avidity on both yeast and T cells, but lost all T cell reactivity to that antigen. This result, though unintended, contributes to our understanding of how these MS TCRs function, and indicates that the instability may somehow be essential to their interaction, or is the most stable interaction that also allows for T cell activation. As traditional receptor engineering techniques rely heavily on selection of variants with more stable or stronger binding of ligand, and this work demonstrated unreliable translation of that selection technique to improved T cell function, an alternative T cell-based strategy for direct screening and selection for TCR variants that endow improved T cell activity has been developed. Together, the work presented here provides insights into the molecular mechanisms involved in the function of human autoimmune TCRs, and provides novel techniques that can be employed to better engineer them.
Top-stable degenerations of finite dimensional representations I
Creators: name: Huisgen-Zimmermann, Birge
Publisher: name: arXiv
Year: 2014
Subjects: subject: Representation Theory (math.RT)
subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics
subject: 16G10, 14D20, 16D70, 16G20

description: Given a finite dimensional representation $M$ of a finite dimensional algebra, two hierarchies of degenerations of $M$ are analyzed in the context of their natural orders: the poset of those degenerations of $M$ which share the top $M/JM$ with $M$ - here $J$ denotes the radical of the algebra - and the sub-poset of those which share the full radical layering $\bigl(J^lM/J^{l+1}M\bigr)_{l \ge 0}$ with $M$. In particular, the article addresses existence of proper top-stable or layer-stable degenerations - more generally, it addresses the sizes of the corresponding posets including bounds on the lengths of saturated chains - as well as structure and classification.
Thermal Fluctuations Evolution of the New Schwarzschild Black Hole
Creators: name: Akhtar, Zunaira
name: Babar, Rimsha
name: Ali, Riasat
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We study the thermodynamic analysis and logarithm corrections of the new Schwarzschild black hole. We compute the thermodynamic quantities like entropy, Hawking temperature and heat capacity. The area of black holes never decreases because they absorb everything from their surroundings due to high gravity. In this regard, the area-entropy relation proposed by Bekenstein needs to be corrected, leading to the concept of logarithmic corrections. To do so, we obtain the corrected entropy for new Schwarzschild black hole to analyze the effects of thermal fluctuations and we evaluate the thermodynamic quantities like specific heat, internal energy, Helmholtz free energy, Gibbs free energy, enthalpy and pressure in the presence of correction parameter $η$. Furthermore, we check the stability of the system with the help of heat capacity and well known Hessian matrix technique. By our graphical analysis, we observe that the thermal fluctuations effects the stability of small radii black holes (e.g., New Schwarzchild black hole) and therefore, small black holes get unstable regions due to these first order corrections.
description: 11 pages, 14 figures, version accepted for publication in Annals of Physics
Web Object Size satisfying Mean Waiting Time In Multiple Access Environment
Creators: name: Lee, Y. -J.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: This paper addresses web object size which is one of important performance measures and affects to service time in multiple access environment. Since packets arrive according to Poission distribution and web service time has arbitrary distribution, M/G/1 model can be used to describe the behavior of the web server system. In the time division multiplexing (TDM), we can use M/D/1 with vacations model, because service time is constant and server may have a vacation. We derive the mean web object size satisfying the constraint such that mean waiting time by round-robin scheduling in multiple access environment is equal to the mean queueing delay of M/D/1 with vacations model in TDM and M/H2/1 model, respectively. Performance evaluation shows that the mean web object size increases as the link utilization increases at the given maximum segment size (MSS), but converges on the lower bound when the number of embedded objects included in a web page is beyond the threshold. Our results can be applied to the economic design and maintenance of web service.
The cyborg Caribbean : bodies, technology and the struggle for (post)humanity in 21st-century Cuban, Dominican, and Puerto Rican science fiction
Creators: name: Ginsburg, Samuel Ellis
name: 0000-0003-0006-6707
Publisher: name: The University of Texas at Austin
Year: 2018
Subjects: Cuba
Puerto Rico
Dominican Republic
Caribbean
Science fiction
Technology
Bodies
Cyborg

description: While the genre of science fiction has origins in European and North American colonizing fantasies, many Caribbean authors are now imagining future worlds that highlight or challenge both historical and present oppressions. Many of these texts describe futuristic machines as a way to underline the historical connection between technology and the domination of marginalized bodies. In this project, I examine various 21st-century Cuban, Dominican and Puerto Rican science fiction texts, looking at how each author manipulates the genre to contest transhumanist, neoliberal narratives that link technological and social progress. Instead, these texts opt for a posthumanist understanding of hypertechnology that seeks the blurred line between body and machine as an opportunity for destabilizing normative binaries while recognizing the ways in which increased technology may amplify the marginalization of certain bodies based on race, gender, sexuality and other factors. As both a historical and literary study, this project seeks to trace the legacies of techno-colonialism and techno-authoritarianism. Each chapter in this dissertation is organized around a specific technological advancement that has challenged the conceptualization of corporeality in the Caribbean: electroshock or electroconvulsive therapy (ECT), nuclear weapons, and the digital avatars. In Chapter 1, texts by Pedro Cabiya, Alexandra Pagán-Vélez and Vagabond Beaumont represent ECT abuse in ways that show the manipulation of narratives of health and science in order to justify state torture. Chapter 2 analyzes works by Rey Emmanuel Andújar, Yasmín Silvia Portales, and Erick Mota to explore the textual nature of nuclear power and the ways that nuclear rhetoric challenges acts of remembrance and mourning. In Chapter 3, texts by Maielis González Fernández, Jorge Enrique Lage, and Rita Indiana Hernández demonstrate the ways social inequalities may be amplified in digital worlds, along with the role that avatars can play in reshaping cyberspace. The goal of this dissertation is to show how Caribbean science fiction can be used to highlight and contest the rhetorical and social legacies of techno-dominance, while mapping out possible resistances for the future
Temnothorax rugosus
Creators: name: Prebus, Matthew M.
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Formicidae
Temnothorax
Temnothorax rugosus

description: rugosus group overview This group is composed of two species, Temnothorax parralensis sp. nov. and T. rugosus, which are found at mid-to-high elevations in the southern United States to central Mexico (Fig. 150). Members of this group have been collected from dead branches on live trees, mostly Quercus spp. The species of the rugosus group, with their arboreal nests, large size, coarse sculpturing, and somewhat incrassate femora, are very similar in habitus to the annexus group, but differ from them by their relatively short propodeal spines and shape of their petiolar nodes (cuneiform to truncate).
description: Published as part of Prebus, Matthew M., 2021, Taxonomic revision of the Temnothorax salvini clade (Hymenoptera: Formicidae), with a key to the clades of New World Temnothorax, pp. 1-462 in PeerJ (e 11514) (e 11514) 9 on page 345, DOI: 10.7717/peerj.11514, http://zenodo.org/record/5102026
Glueballs in Radiative $J/ψ$ Decays
Creators: name: Klempt, Eberhard
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The scalar glueball is observed in a coupled-channel analysis of the $S$-wave amplitude from BESIII data on radiative $J/ψ$ decays and further data. Ten scalar isoscalar resonances were required to fit the data. Five of them were interpreted as mainly-singlet, five as mainly-octet resonances in SU(3). The yield of resonances showed a striking peak with properties expected from a scalar glueball. The $D$ wave amplitude in the BESIII data on radiative $J/ψ$ decays reveales a high-mass structure which can be described by a single Breit-Wigner or by the sum of three $ϕϕ$ resonances interpreted as tensor glueballs a long time ago. The structure - and further tensor resonances observed in radiative $J/ψ$ decays - are tentatively interpreted as tensor glueball. In $J/ψ$ decays into $γπ^0π^0η'$ several resonances are reported. The possibility is discussed that the pseudoscalar glueball might be hidden in these data.
description: Contribution to XVth Quark confinement and the Hadron spectrum conference, August 1st - 6th, 2022, University of Stavanger, Norway
title: Φυσικές ικανότητες και φυσική δραστηριότητα μαθητών πρωτοβάθμιας εκπαίδευσης
titleType: AlternativeTitle
Creators: name: Μπερτάκη, Χριστίνα
Publisher: name: University of Thessaly
Year: 2009
Subjects: subject: ΦΥΣΙΚΗ ΑΓΩΓΗ ΚΑΙ ΕΚΠΑΙΔΕΥΣΗ
subject: ΠΑΙΔΙΑ -- ΦΥΣΙΚΗ ΑΓΩΓΗ

description: Σκοπός της μελέτης ήταν η καταγραφή της φυσικής δραστηριότητας και της φυσικής κατάστασης παιδιών πρωτοβάθμιας εκπαίδευσης. Επίσης ερευνήθηκε η επίδραση της σχολικής και εξωσχολικής φυσικής δραστηριότητας στη φυσική κατάστασή τους. Συμμετείχαν 175 παιδιά, 80 αγόρια (10,45 + 0,5 ετών) και 95 κορίτσια (10,54 + 0,5 ετών). Η φυσική δραστηριότητα αξιολογήθηκε με το 3dPAR-G και μετρήθηκαν τα ημερήσια βήματα με το βηματόμετρου SW200, (ΥΑΜΑΧ Inc.). Οι φυσικές ικανότητες (αντοχή, δύναμη των κοιλιακών μυών και άνω άκρων, ευλυγισίας κορμού και ευκαμψίας) αξιολογήθηκαν με το τεστ Fitnessgram (Cooper Institute). Απ’ τα αποτελέσματα φάνηκε οτι τα παιδιά ήταν αρκετά δραστήρια, ενώ ο αριθμός ημερήσιων βημάτων τους ήταν πιο χαμηλός από τον ενδεδειγμένο για καλή υγεία. Απ’ την ανάλυση διακύμανσης (2x3) με δύο σταθερούς παράγοντες (φύλο και απασχόληση) φάνηκε οτι τ’ αγόρια σημείωσαν υψηλότερα σκορ (ρ=.016), και περισσότερα βήματα (ρ = .016). Δεν υπήρξε επίδραση της συμμετοχής σε αθλητική δραστηριότητα στη συνολική φυσική δραστηριότητα (ρ = .068), > ούτε και σημαντική αύξηση του αριθμού των βημάτων των παιδιών, που συμμετείχαν σ’ αυτή (ρ = .105). Η επίδραση των προγραμμάτων αθλητικής απασχόλησης ήταν σημαντική στην αντοχή, τη δύναμη των κοιλιακών μυών, των άνω άκρων και στην δύναμη και ευλυγισία του κορμού, αλλά όχι στην ευκαμψία (ρ =.000). Μετά την παρέμβαση βελτιώθηκαν μόνο η αντοχή (ρ= .001) και η δύναμη και ευλυγισία του κορμού (ρ =.000). Συνοψίζοντας, φάνηκε οτι τα παιδιά 10-12 ετών ήταν φυσικά δραστήρια, με τα αγόρια να υπερέχουν και η συμμετοχή σε οργανωμένη αθλητική δραστηριότητα είχε θετικές επιδράσεις σε ορισμένες παραμέτρους της φυσικής κατάστασης.
This machine kills fascists : detecting propaganda with formal models of mass discourse structure (and other ideas)
Creators: name: Hyska, Megan Alexandra
Publisher: name: The University of Texas at Austin
Year: 2018
Subjects: Language
Pragmatics

description: This dissertation consists of three free-standing chapters, all of which deal with themes in the philosophy of language in general and in pragmatics in particular. Chapter 1 augments an existing model of discourse-level information structure in order to articulate relevance conditions that make the right predictions about the class of utterances I call higher order utterances. The apparatus introduced turns out also to have some utility for the representation of a certain kind of discourse defectiveness. Chapter 2 explores an analogy between communication and knowledge to ultimately advance the thesis that communication is not a uniquely valuable type of signaling event. Chapter 3 draws connections between propaganda and polarization, and then between the measurement of polarization and the tools used in the modeling of discourse structure. The upshot is that tools from formal pragmatics have an application in the characterization, and perhaps ultimately detection, of propaganda.
The Occurrence of Wide-Orbit Planets in Binary Star Systems
Creators: name: Zuckerman, B.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: The occurrence of planets in binary star systems has been investigated via a variety of techniques that sample a wide range of semi-major axes, but with a preponderance of such results applicable to planets with semi-major axes less than a few AU. We utilize a new method -- the presence or absence of heavy elements in the atmospheres of white dwarf stars -- to elucidate the frequency in main sequence binary star systems of planets with semi-major axes greater than a few AU. We consider only binaries where a putative planetary system orbits one member (no circumbinary planets). For main sequence binaries where the primary star is of spectral type A or F, data in the published literature suggests that the existence of a secondary star with a semi-major axis less than about 1000 AU suppresses the formation and/or long term stability of an extended planetary system around the primary. For these spectral types and initial semi-major axis $\geq$1000 AU, extended planetary systems appear to be as common around stars in binary systems as they are around single stars.
description: Accepted at ApJ Letters
Delocalization of boundary states in disordered topological insulators
Creators: name: Essin, A.
name: Gurarie, V.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We use the method of bulk-boundary correspondence of topological invariants to show that disordered topological insulators have at least one delocalized state at their boundary at zero energy. Those insulators which do not have chiral (sublattice) symmetry have in addition the whole band of delocalized states at their boundary, with the zero energy state lying in the middle of the band. This result was previously conjectured based on the anticipated properties of the supersymmetric (or replicated) sigma models with WZW-type terms, as well as verified in some cases using numerical simulations and a variety of other arguments. Here we derive this result generally, in arbitrary number of dimensions, and without relying on the description in the language of sigma models.
description: 6 pages, 2 figures
High-performance artificial micro/nanomachines and their bioapplications
Creators: name: Guo, Jianhe
name: 0000-0002-0486-5437
Publisher: name: The University of Texas at Austin
Year: 2018
Subjects: Micro/nanomachines
Micromachines
Nanomachines
Bioapplications

description: Artificial micro/nanomachines are micrometer or nanometer scale mechanical devices that convert diverse energy sources into controlled mechanical motions. The development and applications of these micro/nanomachines are among the most pressing challenges in the research field of nanoscience and nanotechnology. In this dissertation, we report innovative designs and operations of artificial micro/nanomachines for bioapplications in biochemical sensing, biomolecule capture, drug delivery and release. Based on the electric tweezers, innovative rotary nanomotors are bottom-up assembled with high efficiency from nanoscale building blocks, which are massively fabricated and less than 1 μm in all dimensions. After assembling, the rotary nanomotors achieve an ultrafast speed up to 18,000 rpm, an ultradurable operation lifetime of 80 hours, and over 1.1 million rotation cycles. To explore diverse alternative energy inputs for nanomotors, we also applied electric tweezers in the guided manipulation of chemical nanomotors: the motions of chemical nanomotors are aligned along the direction of AC electric fields and their speeds are modulated by the DC electric fields. The prowess of the manipulation of chemical nanomotors by the electric tweezers is demonstrated for applications in cargo delivery to designated microdocks and assembling of chemical nanomotors for powering rotary nanoelectromechanical system (NEMS) devices. To integrate the function of Raman sensing on the micro/nanomachines, plasmonic nanomotors and bio-photonic-plasmonic micromotors with silver (Ag) nanoparticle coating are designed and fabricated, which provide ultrasensitive detection of biochemicals by Surface-enhanced Raman spectroscopy (SERS). The plasmonic nanomotors are designed with nanoporous superstructures, providing high capacities of drug loading and large numbers of hotspots. The plasmonic nanomotors also actively manipulate molecules and tune the release rate in electric fields due to the induced electrokinetic effect. The bio-photonic-plasmonic micromotors based on biosilica diatom frustules are applied in the capture and detection of DNA molecules, which are significantly accelerated during the rotation of the micromotors. The fundamental mechanism is investigated and attributed to the reduction of Nernst diffusion layer caused by the rotation. The innovations of artificial micro/nanomachines including concept, design, fabrication, manipulation, and bioapplications in this dissertation, are expected to inspire various research areas including NEMS, nanorobotics, microfluidics, biochemical delivery, and diagnostic sensing
Aspects of class-S theories
Creators: name: Yan, Fei, (Ph. D. In Physics)
Publisher: name: The University of Texas at Austin
Year: 2018
Subjects: Class-S theories
Product superconformal field theories
Line defects

description: This dissertation discusses certain aspects of class-S theories [1,2]. First we give an overview of class-S theories. Then we report on the study of product SCFTs in class-S theories. We first describe an algorithm to determine whether an isolated 4d N = 2 SCFT is a product of two (or more) theories and apply this algorithm to a large subset of class-S theories that have been catalogued. This part is based on joint work with Jacques Distler and Behzat Ergun [3]. Afterwards we report on some preliminary studies of the supersymmetric vacuum moduli space of product SCFTs. Finally we turn our attention to supersymmetric (half) line defects in 4d N = 2 theories. In particular we describe a close relation between the Schur index in the presence of a supersymmetric (half) line defect and the vacuum expectation value of such line defect in U(1) [subscript r]-invariant vacua of the theory compactified on a circle. We explicitly check such relation in some special class-S theories: the ArgyresDouglas theories of type (A₁, A₂), (A₁, A₄), (A₁, A₆), (A₁, D₃) and (A₁, D₅). This part is based on joint work with Andrew Neitzke [4].
Societal Vulnerability and Resilience in the COVID-19 Crisis
Creators: name: De Marchi, Bruno
Publisher: name: Universita' degli Studi di Salerno
Year: 2020
Subjects: COVID-19
Disaster
Crisis
Uncertainty
Vulnerability
Resilience

description: Despite the possibility of a pandemic had been seriously considered in professional circles, most governments were taken by surprise by the rapid diffusion of the SARS CoV-2, from first reports in China (December 2019) to the declaration of the COVID-19 pandemic by the WHO (11th March 2020). The same was true for the majority of citizens, unfamiliar with the word pandemic and its meaning. The nightmare scenario of a collapse of the health services and its consequences led to the adoption of measures that impacted very heavily on peoples’ daily lives and required great efforts of adaptation with a high toll on the econom-ic, social and cultural spheres. The paper focuses on some of the major vulnerabilities hig-hlighted by the crisis, from the limited knowledge on the virus and the pandemic to the many uncertainties regarding the response of the human systems and their capacity to cope. Some positive short-term responses are identified, while long-term resilience remains doubtful, including the stability of democratic processes.