cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
A Theoretical and Experimental Analysis of the Effect of Nanoclay on Gas Perm-Selectivity of Biodegradable PLA/EVA Blends in the Presence and Absence of Compatibilizer
Creators: name: Karimpour-Motlagh, Navid
name: Moghadam, Abolfazl Salehi
name: Khonakdar, Hossein Ali
name: Jafari, Seyed Hassan
name: Wagenknecht, Udo
name: Kasbi, Sina Farahani
name: Shojaei, Shahrokh
name: Mirzaee, Ramin
Publisher: name: New York, NY [u.a.] : Wiley InterScience
Year: 2020
Subjects: subject: barrier films
subject: bio-based film packaging
subject: PLA/EVA blends
subject: polymer/clay nanocomposites
subject: 540

description: Poly (lactic acid) (PLA)-based compounds are widely used in thin-film and food packaging industries. Herein, PLA/ethylene vinyl acetate copolymer (EVA)/nanoclay nanocomposites are prepared in various compositions by melt blending. The gas permeability against N2, CO2, and O2 gases is determined as a function of composition and morphology of the nanocomposites. Inclusion of high aspect ratio of platelet-like nanoclay to the blend reduces the gas diffusion. The best barrier properties against all gases is observed on introducing 5 wt% poly(ethylene/n-butyl acrylate glycidyl methacrylate) copolymer as compatibilizer to the PLA/EVA/nanoclay (75/25/5) system. The scanning and transmission electron microscopic analyses and wide-angle X-ray scattering studies reveal that inclusion of compatibilizer to the filled-blends improves the blend morphology, dispersion state, and intercalation level of clay platelets which are preferably localized at the interface of the blend. Analysis of selectivity parameter (a) shows the lowest O2 permeability and the highest aCO2/N2 and aO2/N2 values for the compatibilized filled-blend (75/25/5/5). In situ aspect ratio of clay and the degree of intercalation are theoretically evaluated based on the permeability data using various empirical models. It is found that the compatibilized filled-blend has the highest aspect ratio and intercalation level that are responsible for the optimum perm-selectivity performance. © 2020 The Authors. Published by Wiley-VCH GmbH
Black hole superradiance with (dark) matter accretion
Creators: name: Hui, Lam
name: Law, Y. T. Albert
name: Santoni, Luca
name: Sun, Guanhao
name: Tomaselli, Giovanni Maria
name: Trincherini, Enrico
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Studies of black hole superradiance often focus on the growth of a cloud in isolation, accompanied by the spin-down of the black hole. In this paper, we consider the additional effect of the accretion of matter and angular momentum from the environment. We show that, in many cases, the black hole evolves by drifting along the superradiance threshold, in which case the evolution of its parameters can be described analytically or semi-analytically. We quantify the conditions under which accretion can serve as a mechanism to increase the cloud-to-black hole mass ratio, beyond the standard maximum of about 10%. This occurs by a process we call over-superradiance, whereby accretion effectively feeds the superradiance cloud, by way of the black hole. We give two explicit examples: accretion from a vortex expected in wave dark matter and accretion from a baryonic disk. In the former case, we estimate the accretion rate by using an analytical fit to the asymptotic behavior of the confluent Heun function. Level transition, whereby one cloud level grows while the other shrinks, can be understood in a similar way.
description: 30+21 pages, 14 figures
title: Nonresident Enrollment Demand at Utah State University
Creators: name: Workman, William G.
Publisher: name: Utah State University
Year: 1978

description: The determination of the level of student registration fees at colleges and universities in many cases appears to be made without adequate consideration given to probable enrollment responses and to the associated implications for tuition revenues. This study was aimed at reducing this information gap at Utah State University and focused specifically on past sensitivities of students from neighboring western states to changes in the nonresident charges at USU. The analytical framework employed in this investigation specified a causal link between the proportion of the college-attending populations from these states choosing to enroll at USU and comparative tuition levels.
The empirical findings showed considerable variation among students from different states with regard to their adjustments to changes in the USU fee. These differences in sensitivities were interpreted as a reflection of the desire and ability of students to make substitutions between USU and alternative colleges in the face of these relative tuition changes. While it was expected a priori that students at different stages of their academic careers would exhibit some disparity in their responses to fee level adjustments- the study results offered no evidence that a consistent discrepancy was present. When data from the various states under consideration were aggregated and used in the estimation of enrollment response functions, the demand for admission at USU was shown to be relatively inelastic with respect to the nonresident registration charge.
The empirical results suggest that while increases in nonresident tuition levels at USU may produce greater tuition revenues due to the inelastic demand, tuition policy does represent an important determinant of aggregate enrollment patterns. Furthermore, the data show marked variations among students from different states regarding their demand elasticities, suggesting that adjustments in nonresident charges could also be expected to produce a compositional change in the USU student body. The weight given to these considerations in determining the policy for nonresident tuition at USU must reflect the management objectives of the school governing board.
Estimating relic magnetic fields from CMB temperature correlations
Creators: name: Giovannini, Massimo
Publisher: name: arXiv
Year: 2009
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The temperature and polarization inhomogeneities of the Cosmic Microwave Background might bear the mark of pre-decoupling magnetism. The parameters of a putative magnetized background are hereby estimated from the observed temperature autocorrelation as well as from the measured temperature-polarization cross-correlation.
description: 9 pages, 6 included figures
Effects of electron-electron interactions in the Yu-Shiba-Rusinov lattice model
Creators: name: Kachin, Valerii
name: Ojanen, Teemu
name: Lado, Jose L.
name: Hyart, Timo
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: In two-dimensional superconductors, Yu-Shiba-Rusinov bound states, induced by the magnetic impurities, extend over long distances giving rise to a long-range hopping model supporting a large number of topological phases with distinct Chern numbers. Here, we study how the electron-electron interactions affect on a mean-field level the selection of the realized Chern numbers and the magnitudes of the topological energy gaps in this model. We find that in the case of an individual choice of the model parameters the interactions can enhance or reduce the topological gap as well as cause topological phase transitions because of the complex interplay of superconductivity, magnetism, and large spatial extent of the Yu-Shiba-Rusinov states. By sampling a large number of realizations of Yu-Shiba-Rusinov lattice models with different model parameters, we show that statistically the interactions have no effect on the realized Chern numbers and typical magnitudes of the topological gaps. However, the interactions substantially increase the likelihood of the largest topological gaps in the tails of the energy gap distribution in comparison to the non-interacting case.
Architecture engineering of carbonaceous anodes for high‐rate potassium‐ion batteries
Creators: name: Wu, Tianlai
name: Zhang, Weicai
name: Yang, Jiaying
name: Lu, Qiongqiong
name: Peng, Jing
name: Zheng, Mingtao
name: Xu, Fei
name: Liu, Yingliang
name: Liang, Yeru
Publisher: name: Hoboken, NJ : Wiley
Year: 2021
Subjects: subject: carbonaceous anodes
subject: electronic conductivity
subject: high‐rate performance
subject: ion diffusivity
subject: potassiumion batteries
subject: 333,7

description: The limited lithium resource in earth's crust has stimulated the pursuit of alternative energy storage technologies to lithium‐ion battery. Potassium‐ion batteries (KIBs) are regarded as a kind of promising candidate for large‐scale energy storage owing to the high abundance and low cost of potassium resources. Nevertheless, further development and wide application of KIBs are still challenged by several obstacles, one of which is their fast capacity deterioration at high rates. A considerable amount of effort has recently been devoted to address this problem by developing advanced carbonaceous anode materials with diverse structures and morphologies. This review presents and highlights how the architecture engineering of carbonaceous anode materials gives rise to high‐rate performances for KIBs, and also the beneficial conceptions are consciously extracted from the recent progress. Particularly, basic insights into the recent engineering strategies, structural innovation, and the related advances of carbonaceous anodes for high‐rate KIBs are under specific concerns. Based on the achievements attained so far, a perspective on the foregoing, and proposed possible directions, and avenues for designing high‐rate anodes, are presented finally.
Heavy elements and electromagnetic transients from neutron star mergers
Creators: name: Rosswog, S.
name: Korobkin, O.
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Compact binary mergers involving neutron stars can eject a fraction of their mass to space. Being extremely neutron rich, this material undergoes rapid neutron capture nucleosynthesis, and the resulting radioactivity powers fast, short-lived electromagnetic transients known as kilonova or macronova. Such transients are exciting probes of the most extreme physical conditions and their observation signals the enrichment of the Universe with heavy elements. Here we review our current understanding of the mass ejection mechanisms, the properties of the ejecta and the resulting radioactive transients. The first well-observed event in the aftermath of GW170817 delivered a wealth of insights, but much of today's picture of such events is still based on a patchwork of theoretical studies. Apart from summarizing the current understanding, we also point out questions where no consensus has been reached yet, and we sketch possible directions for the future research. In an appendix, we describe a publicly available heating rate library based on the WinNet nuclear reaction network, and we provide a simple fit formula to alleviate the implementation in hydrodynamic simulations.
description: 22 pages, updated according to the suggestions of two referees; accepted by Annalen der Physik
Hadronic D decays involving even-parity light mesons
Creators: name: Cheng, Hai-Yang
name: Chiang, Cheng-Wei
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We study the hadronic D meson decays into a pseudoscalar meson $P$ and an even-parity meson $M$, where $M$ represents a scalar meson $S$, an axial-vector meson $A$, or a tensor meson $T$. These decays are first analyzed in the flavor-diagram approach. Fits to the $SP$ modes with $S$ being a non-strange scalar meson show that neither the simple $q\bar q$ picture nor the $q^2\bar q^2$ scheme is favored by data. Current measurements on the $AP$ decays are insufficient for a meaningful analysis. Some $TP$ data are inconsistent with the others. In certain cases, the $W$-annihilation diagrams indicated by the data are unexpectedly large. As a comparison, we also compute their decay rates in the factorization approach using form factors extracted from the covariant light-front model. We find that factorization works well for Cabibbo-allowed $D^+ \to SP,AP$ decays free of the weak annihilation contributions ($W$-exchange or $W$-annihilation). For the other $SP$ and $AP$ modes, it is necessary to include weak annihilation contributions to account for the data. However, factoriztion fails for $D\to TP$ decays for some unknown reason; the predicted rates are in general too small by at least two orders of magnitude compared to experiment. We also examine the finite width effects of resonances. Some decay modes which are kinematically forbidden become physically allowed due to the finite width of the resonance. We show that the branching fraction of $D^+\toσπ^+$ extracted from three-body decays is enhanced by a factor of 2, whereas $\B(D^0\to f_2(1270)\ov K^0)$ is reduced by a factor of 4 by finite width effects.
description: 30 pages; add a new section VII and several references. To appear in PRD
title: Reduced Recruitment in Utah Mule Deer Relative to Winter Condition
Creators: name: Zwank, Phillip J.
Publisher: name: Utah State University
Year: 1978

description: Reduced recruitment rates in Utah mule deer (Odocoilus hemionus) showed that significant losses in production were accruing during pregnancy, the neonatal period or during the first few months after birth . The primary objectives of the study were to determine the time, extent and possible causes of these losses.
Corpora luteal and fetal rates were estimated by examining the reproductive tracts of 125 carcasses collected on selected herd units in Utah and by observing the reproductive tracts of 136 female deer captured in Spanish Fork Canyon. A laparotomy was performed on each captured female to allow visual examination of the reproductive tract without sacrificing the doe. Live-birth rates were estimated by observing and monitoring pregnant wild does held captive during the fawning period, and by observing free - ranging does tagged with radio- transmitters . Fawn mortality was estimated by monitoring radio-tagged fawns, captured shortly after birth until fawn:doe ratios were observed the following fall.
The greatest loss in production occurred during the post-natal period. Annual fawn losses averaged 26.4 percent, while a 3.7 percent interuterine loss occurred before midpregnancy and a 9.5 percent fetal loss was recorded between midpregnancy and parturition. No single mortality factor appeared to be responsible for most of the fawn losses.
Condition of the pregnant doe on the winter range was investigated as the cause of reduced recruitment. The condition of the doe had to be accurately estimated while the doe was alive, before the relationship between condition and reproductive success could be evaluated. The condition of 43 carcasses, based upon a modified nutritional status index that included weight corrected for size and age, was highly significantly correlated to condition of the same carcasses estimated by amount of kidney fat (r=0.70, P
Bi-presymplectic chains of co-rank one and related Liouville integrable systems
Creators: name: Błaszak, Maciej
name: Gürses, Metin
name: Zheltukhin, Kostyantyn
Publisher: name: arXiv
Year: 2009
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: Bi-presymplectic chains of one-forms of co-rank one are considered. The conditions in which such chains represent some Liouville integrable systems and the conditions in which there exist related bi-Hamiltonian chains of vector fields are derived. To present the construction of bi-presymplectic chains, the notion of dual Poisson-presymplectic pair is used and the concept of d-compatibility of Poisson bivectors and d-compatibility of presymplectic forms is introduced. It is shown that bi-presymplectic representation of related flow leads directly to the construction of separation coordinates in purely algorithmic way. As an illustration bi-presymplectic and bi-Hamiltonian chains in ${\mathbb R}^3$ are considered in detail.
title: Effect of Forage Height Upon the Microtemperature of a Grass-Legume Pasture and a Comparison of Forage Composition
Creators: name: Warnick, Robert E.
Publisher: name: Utah State University
Year: 1963

description: The use of pasture to provide low cost feed for dairy and other farm animals is an important factor in the success of livestock operations.
Some of the factors which influence the income from pasture land are: management, pasture mix, and climate. The management of a pasture can determine to a great extent the value of pasture in a farming enterprise. Irrigating the pasture at the right time, using the right fertilizer, and proper methods of harvesting are examples of some of the management problems facing the grassland farmer.
title: The Accuracy of Soil Mapping Units of Certain Pachic and Cumulic Soils in Northern Utah
Creators: name: Badamchian, Behjat
Publisher: name: Utah State University
Year: 1976

description: The purpose of this study was to determine the accuracy of mapping of pachic and cumulic soils in Cache County. The soil maps that were used for this study as the basemap were the Atlas sheets of the published soil survey of Cache County.
Five map units from Mendou, Nebeker, Avon, Hendricks and Winn which include almost 52 percent of the pachic and cumulic soils in the survey area were selected for this study. These five soils cover large areas when compared to other soil series and they are distributed throughout the county. All these map units were recognized as pachic and cumulic in the published soil survey report. The thickness of the epipedon was therefore selected as the principal criterion for determining the accuracy of the map units.
About 400 samples from the major delineations were studied in the field and the necessary data were collected and interpreted statistically in order to find: (1) the accuracy of each map unit, (2) the inclusions, misclassified and not classified pedons and their proportions, and (3) the estimated thickness of the epipedons.
Attempts were made to select the pedons on transects with appropriate interval, depending on landforms and continuity of soils.
Statistical interpretations were conducted by using the chi-square method. The results for each map units are as follows: for Mendon map unit (MeA) 42-56 percent and for Hendricks map unit (HdD) only 30-60 percent of the samples have characteristics required for the named soil in these map units.
These values are less than 75 percent which is the critical value for the map units by definition. It is concluded therefore that with the available data the Mendon and Hendricks series have been mapped incorrectly. For Nebeker map unit (NbE) 77-93 percent and from Avon map unit (ArA) 85-99 percent of the samples have the characteristics required for the named soil in the map units. These values are more than the critical value (75) so it is concluded that with available data the Nebeker and Avon series have been mapped correctly. For Winn map unit (Wn) 54-82 percent of the samples have the required characteristics of this series. The statistical analysis did not reveal strictly whether the pedons are mapped correctly or not and additional samples are required to adequately test the accuracy of the Winn map unit.
It is concluded that in Cache County the influence of different geologic depositions and variations in topography are two major factors responsible for poor accuracy in mapping the Mendon and Hendricks series.
Evolution of Low-Frequency Vibrational Modes in Ultrathin GeSbTe Films
Creators: name: Zallo, Eugenio
name: Dragoni, Daniele
name: Zaytseva, Yuliya
name: Cecchi, Stefano
name: Borgardt, Nikolai I.
name: Bernasconi, Marco
name: Calarco, Raffaella
Publisher: name: Weinheim : Wiley-VCH
Year: 2021
Subjects: subject: 2D materials
subject: first principles
subject: molecular beam epitaxy
subject: phase-change materials
subject: Raman
subject: 530

description: GeSbTe (GST) phase-change alloys feature layered crystalline structures made of lamellae separated by van der Waals (vdW) gaps. This work sheds light on the dependence of interlamellae interactions at the vdW gap on film thickness of GST alloys as probed by vibrational spectroscopy. Molecular beam epitaxy is used for designing GST layers down to a single lamella. By combining density-functional theory and Raman spectroscopy, a direct and simple method is demonstrated to identify the thickness of the GST film. The shift of the vibrational modes is studied as a function of the layer size, and the low-frequency range opens up a new route to probe the number of lamellae for different GST compositions. Comparison between experimental and theoretical Raman spectra highlights the precision growth control obtained by the epitaxial technique.
NLO QCD corrections to ZZ+jet production at hadron colliders
Creators: name: Binoth, T.
name: Gleisberg, T.
name: Karg, S.
name: Kauer, N.
name: Sanguinetti, G.
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: A fully differential calculation of the next-to-leading order QCD corrections to the production of Z-boson pairs in association with a hard jet at the Tevatron and LHC is presented. This process is an important background for Higgs particle and new physics searches at hadron colliders. We find sizable corrections for cross sections and differential distributions, particularly at the LHC. Residual scale uncertainties are typically at the 10% level and can be further reduced by applying a veto against the emission of a second hard jet. Our results confirm that NLO corrections do not simply rescale LO predictions.
description: 15 pages, 4 figures, 4 tables; added 1 reference, version to appear in Phys. Lett. B
Guided elastic waves in a highly-stretched soft plate
Creators: name: Delory, Alexandre
name: Lemoult, Fabrice
name: Eddi, Antonin
name: Prada, Claire
Publisher: name: arXiv
Year: 2022
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences
subject: 74-05, 74B15, 74D10, 74J99, 74K20

description: We study the propagation of guided elastic waves in a highly-stretched Ecoflex\c{opyright} plate, a nearly incompressible elastomer. The plate is subjected to a nearly-uniaxial stress with an elongation reaching 120% and we measure in-plane displacements of the shear horizontal mode SH0 and of the plate mode S0 coexisting in the low frequency limit. An induced anisotropy is first observed and characterized by following the phase velocities in two principal directions. Although these measurements provide an initial stress estimate, we evidence the limits of the acoustoelastic theory to predict those phase velocities in a prestressed elastomer. Taking into account the frequency dependent shear modulus of the elastomer, an experiment-driven fractional rheological model is added to the theory. This provides a proper prediction of phase velocities up to 80% elongation.
description: 12 pages 8 figures published in: Extreme Mechanics Letter
Electrically driven insulator-to-metal transition in a correlated insulator: Electronic mechanism and thermal description
Creators: name: Díaz, Manuel I.
name: Han, Jong E.
name: Aron, Camille
Publisher: name: arXiv
Year: 2022
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Motivated by the resistive switchings in transition-metal oxides (TMOs) induced by a voltage bias, we study the far-from-equilibrium dynamics of an electric-field-driven strongly-correlated model featuring a first-order insulator-to-metal transition at equilibrium, namely the dimer-Hubbard model. We use a non-equilibrium implementation of the dynamical cluster approximation to access the steady-state spectral and transport properties. We show that the electric field can drive both metal-to-insulator and insulator-to-metal transitions. While they proceed by quite distinct mechanisms, specifically simple heating of the metal versus non-equilibrium effects in the correlated charge gap, we show that both of these non-equilibrium transitions can be unified in a single framework once the excitations are accounted for in terms of an effective temperature. This conceptual advance brings together the two sides of the long-lasting debate over the origins of the electrically-driven resistive switching in TMOs.
description: 15 pages, 11 figures. v2: minor changes
title: The Guitar as an Accompaniment Instrument
Creators: name: Christiansen, Michael
Publisher: name: Utah State University
Year: 1976

description: A reliable music store should carry a wide selection of guitars for you to choose from. Ask your teacher which brands he would suggest. You might also ask him to help select a guitar for you. You do not need an expensive instrument in the beginning. Choose a guitar that feels comfortable to you. Do not choose one that is too large for you to hold correctly.
Evidence for a Stellar Disruption by an IMBH in an Extragalactic Globular Cluster
Creators: name: Irwin, Jimmy A.
name: Brink, Thomas G.
name: Bregman, Joel N.
name: Roberts, Timothy P.
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We report [O III] 5007 Angstrom and [N II] 6583 Angstrom emission from a globular cluster harboring the ultraluminous X-ray source (ULX) CXOJ033831.8-352604 in the Fornax elliptical galaxy NGC1399. No accompanying Balmer emission lines are present in the spectrum. One possibility is that the forbidden lines emanate from X-ray illuminated debris of a star that has been tidally-disrupted by an intermediate-mass black hole (IMBH), with this debris also feeding the black hole leading to the observed X-ray emission. The line strengths indicate that the minimum size of the emitting region is ~10^15 cm, and if the 70 km/s half-widths of the emission lines represent rotation around the black hole, a minimum black hole mass of 1000 solar mass is implied. The non-detection of H-alpha and H-beta emission lines suggests a white dwarf star was disrupted, although the presence of strong nitrogen emission is somewhat of a mystery.
description: 5 pages, 2 figures, accepted by Astrophysical Journal Letters, moderate changes since last revision, main conclusions unchanged
Hard Optimization Problems have Soft Edges
Creators: name: Marino, Raffaele
name: Kirkpatrick, Scott
Publisher: name: arXiv
Year: 2022
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Data Structures and Algorithms (cs.DS)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Finding a Maximum Clique is a classic property test from graph theory; find any one of the largest complete subgraphs in an Erdös-Rényi G(N, p) random graph. We use Maximum Clique to explore the structure of the problem as a function of N, the graph size, and K, the clique size sought. It displays a complex phase boundary, a staircase of steps at each of which 2log2 N and Kmax, the maximum size of a clique that can be found, increases by 1. Each of its boundaries has a finite width, and these widths allow local algorithms to find cliques beyond the limits defined by the study of infinite systems. We explore the performance of a number of extensions of traditional fast local algorithms, and find that much of the "hard" space remains accessible at finite N. The "hidden clique" problem embeds a clique somewhat larger than those which occur naturally in a G(N, p) random graph. Since such a clique is unique, we find that local searches which stop early, once evidence for the hidden clique is found, may outperform the best message passing or spectral algorithms.
description: arXiv admin note: text overlap with arXiv:1807.09091
Optical Superradiance from Nuclear Spin Environment of Single Photon Emitters
Creators: name: Kessler, E. M.
name: Yelin, S.
name: Lukin, M. D.
name: Cirac, J. I.
name: Giedke, G.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Quantum Physics (quant-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We show that superradiant optical emission can be observed from the polarized nuclear spin ensemble surrounding a single photon emitter such as a single quantum dot (QD) or Nitrogen-Vacancy (NV) center. The superradiant light is emitted under optical pumping conditions and would be observable with realistic experimental parameters.
description: 4+ pages, 3 figures, considerably rewritten, conclusions unchanged, accepted version
Semiclassical calculation of time delay statistics in chaotic quantum scattering
Creators: name: Novaes, Marcel
Publisher: name: arXiv
Year: 2022
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: We present a semiclassical calculation, based on classical action correlations implemented by means of a matrix integral, of all moments of the Wigner--Smith time delay matrix, $Q$, in the context of quantum scattering through systems with chaotic dynamics. Our results are valid for broken time reversal symmetry and depend only on the classical dwell time and the number of open channels, $M$, which is arbitrary. Agreement with corresponding random matrix theory reduces to an identity involving some combinatorial concepts, which can be proved in special cases.
description: 9 pages, no figures
Solving Lattice QCD systems of equations using mixed precision solvers on GPUs
Creators: name: Clark, M. A.
name: Babich, R.
name: Barros, K.
name: Brower, R. C.
name: Rebbi, C.
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: Modern graphics hardware is designed for highly parallel numerical tasks and promises significant cost and performance benefits for many scientific applications. One such application is lattice quantum chromodyamics (lattice QCD), where the main computational challenge is to efficiently solve the discretized Dirac equation in the presence of an SU(3) gauge field. Using NVIDIA's CUDA platform we have implemented a Wilson-Dirac sparse matrix-vector product that performs at up to 40 Gflops, 135 Gflops and 212 Gflops for double, single and half precision respectively on NVIDIA's GeForce GTX 280 GPU. We have developed a new mixed precision approach for Krylov solvers using reliable updates which allows for full double precision accuracy while using only single or half precision arithmetic for the bulk of the computation. The resulting BiCGstab and CG solvers run in excess of 100 Gflops and, in terms of iterations until convergence, perform better than the usual defect-correction approach for mixed precision.
description: 30 pages, 7 figures
title: An Evaluation of the Effectiveness of the Teacher Education Program at Utah State University for Elementary School Teachers
Creators: name: Alldredge, Diana
Publisher: name: Utah State University
Year: 1977

description: The purpose of this study was to evaluate the effectiveness of the teacher education program in the Department of Elementary Education at Utah State University. The program has been in effect for only a few years and the department desired that an evaluation b e conducted to determine its present strengths and weaknesses.
The procedure used to collect data for this study involved several instruments. Letters were sent to 150 universities in the United States to determine what they had done to evaluate their teacher education programs. Questionnaires were sent to 399 graduates from 1974, 1975, and 1976 to ask their opinions of the program. Questionnaires were also sent to 101 principals of these graduates asking them to evaluate the graduates as products of the program. Visits were made to a random sample of 20 graduates and principals. Recommendations for the program were requested of the graduates and principals on the questionnaires and during visits.
The results of this study showed strengths in the program in the subject areas of language arts, math, and social studies. Weaknesses were found in the areas of art, music, physical education, reading, and science.
In the teaching competencies major strengths were found in the areas of positive personality traits, capturing interest and attention, encouraging creative activity, collecting and using media and materials, and gaining trust and building student self-concept. Major weaknesses were found in the areas of helping students of varied ethnic backgrounds, correlating curriculum with that in the grades preceeding and following, making interest centers and learning stations, caring for health, safety, and muscle coordination, helping students to use inductive and deductive thinking, and helping students develop visual and auditory perception.
It was also found that the principals feel differently about graduates' performance than the graduates do. The principals rated the majority of the graduates slightly above average compared to other beginning teachers, while the graduates rated themselves above or below their principals' ratings. The correlations of individual pairs of graduates and principals were, therefore, very low.
The overall ratings of graduates and principals, obtained through the questionnaires and interviews, were similar. The college supervisors and cooperating teachers also showed agreement. However, the graduates and principals did not agree with the college supervisors and cooperating teachers in their ratings.
The molecular structure of 1,2:5,6-Di-O-isopropylidene-3-otoluenesulfonyl- α-D-glucofuranose
Creators: name: Mamat, C.
name: Peppel, T.
name: Köckerling, M.
Publisher: name: Basel : MDPI AG
Year: 2012
Subjects: subject: Carbohydrates
subject: Glucose
subject: Tosylation
subject: 540

description: The crystal and molecular structure of 1,2:5,6-di-O-isopropylidene-3-Otoluenesulfonyl- α-D-glucofuranose is reported. This compound crystallizes from a petroleum ether/ethyl acetate mixture with the chiral orthorhombic space group P212121 with four molecules in the unit cell. The unit cell parameters are: a = 9.7945(7) Å, b = 10.1945(7) Å, c = 21.306(1) Å, and V = 2127.4(2) Å3. No classical hydrogen bonds were found. Bond lengths and angles of this tosylated glucofuranose derivative are typical.
Supplementary Material for "Decoherence dynamics in molecular qubits: Exponential, Gaussian and beyond
Creators: name: Gustin, Ignacio
name: Chen, Xinxian
name: Franco, Ignacio
Publisher: name: AIP Publishing
Year: 2025
Subjects: classificationCode: 51
subject: Physical sciences
subject: FOS: Physical sciences

description: Derivation of the decoherence function at finite temperatures for initially entangled states.
title: Effects of Fluoride Availability on Fluoride Content of Deciduous Teeth of Children and Bone Measurements of the Mothers in Some Utah Communities
Creators: name: Lowgren, Monika Margareta
Publisher: name: Utah State University
Year: 1976

description: The relationship between the fluoride content of the enamel and dentine of deciduous teeth and the number of tooth lesions/mouth was compared to fluoride treatment in Logan , Brigham City, Helper and Milford, Utah. Bone measurement data was obtained on the second metacarpal bones of the mother s of the participating children from the same communities except Brigham City.
The fluoride treatment in the communities were as follows: Logan has no fluoride added to the domestic water supply but some children received fluoride treatment through tablets, drops, etc. Milford has water which naturally contains 0 . 8 ppm fluoride , Helper and Brigham City have 1 ppm fluoride added to their water ,supplies.
The results showed that significantly less (P > 0.05) fluoride existed in the dentine of teeth originating from Logan children without fluoride treatment than the dentine from fluoride treated children in Logan and Brigham City. The fluoride content of the enamel showed a tendency to be increased with increasing amount of fluoride exposure. The fluoride content of the enamel and dentine from non fluoride treated Logan children was considerably less than from fluoride treated Logan children and from Brigham City children.
Logan children who had received fluoride treatments had significantly (P > 0.05) fewer dental lesions/mouth compared to the nontreated Logan children. The fluoride exposed Milford and Helper children had a greater frequency of dental lesions/mouth than even nonfluoride treated Logan children . This might be explained by the socioeconomic differences existing between Logan in comparison to Helper and Milford.
Midshaft bone measurements were taken on x-rays of the second metacarpal of women (average age 35.7) residing ten or more years in the respective community. When measuring cortical thickness, cortical area, medullary area, and per cent cortical area, no significant differences could be shown.
Brane-Bulk energy exchange and agegraphic dark energy
Creators: name: Sheykhi, Ahmad
Publisher: name: arXiv
Year: 2009
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We consider the agegraphic models of dark energy in a braneworld scenario with brane-bulk energy exchange. We assume that the adiabatic equation for the dark matter is satisfied while it is violated for the agegraphic dark energy due to the energy exchange between the brane and the bulk. Our study shows that with the brane-bulk interaction, the equation of state parameter of agegraphic dark energy on the brane, $w_D$, can have a transition from normal state where $w_D >-1 $ to the phantom regime where $w_D
description: 13 pages, to appear in IJMPD
title: A Model Child Abuse and Neglect reporting Policy and Procedure for Use by Utah School Personnel
Creators: name: London, Samuel Barry
Publisher: name: Utah State University
Year: 1976

description: A model child abuse and neglect reporting policy and procedure was developed which Utah school districts could use in preparing their own district specific policies and procedures for use by district personnel. The development of the model policy was carried out using two groups of consultants for evaluating the model's format, content, and usability. A third group of consultants, the superintendent or a designee in each of the 40 Utah school districts, was asked to evaluate the model policy for completeness, format, and adoptability. The evaluation was made with a questionnaire developed by the researcher and mailed to the 40 Utah superintendents. Accompanying each questionnaire was a letter of transmittal and a self-addressed, stamped, return envelope. Three mailings were utilized to achieve a usable 92.5%return.
Examination of the data collected from the superintendents or a designee showed the following:
1. Averaging the questions regarding the completeness of the model policy, 82 . 5% of the respondents rated the overall model policy as being complete.
2. Seventy-six percent of the respondents felt that the format of the model policy would not cause a problem with existing policy format in their districts.
3 . Seventy percent of the respondents would adopt the model policy for use in their district. (Three districts have a policy dealing with child abuse and neglect and two respondents would recommend adoption.)
title: Sensitivity Analysis of Surface Deposition in a Numerical Model of Atmospheric Dispersion
Creators: name: Lewis, Jackie
Publisher: name: Utah State University
Year: 1976

description: Profiles of height-dependent diffusion which accommodate site-specific diffusivities were produced. A numerical model was adapted to incorporate the profiles. The model represented three-dimensional steady-state advection and diffusion of aerosols from an elevated point source. Sorption effects were simulated with surface attachment coefficients greater than unity. This proved effective in depleting the plume differentially upward from the surface.
BCS-BEC Crossover in Symmetric Nuclear Matter at Finite Temperature: Pairing Fluctuation and Pseudogap
Creators: name: Huang, Xu-Guang
Publisher: name: arXiv
Year: 2010
Subjects: subject: Nuclear Theory (nucl-th)
subject: Superconductivity (cond-mat.supr-con)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Experiment (nucl-ex)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: By adopting a $T$-matrix based method within $G_0G$ approximation for the pair susceptibility, we studied the effects of pairing fluctuation on the BCS-BEC crossover in symmetric nuclear matter. The pairing fluctuation induces a pseudogap in the excitation spectrum of nucleon in both superfluid and normal phases. The critical temperature of superfluid transition was calculated. It differs from the BCS result remarkably when density is low. We also computed the specific heat which shows a nearly ideal BEC type temperature dependence at low density but a BCS type behavior at high density. This qualitative change of the temperature dependence of specific heat may serve as a thermodynamic signal for BCS-BEC crossover.
description: 11 pages,11 figures,1 table, published version in Phys. Rev. C.
title: Guidelines for Roadside Revegetation to Create Wildlife Habitat in Northern Utah
Creators: name: Anderson, Lars D.
Publisher: name: Utah State University
Year: 1996

description: Many species of wildlife use roadside vegetation as habitat. The ring-necked pheasant (Phasianus colchicus) utilizes roadsides for all types of cover. Because pheasants are nonmigratory and generally live their entire lives within a 1- to 2-mile radius, pheasants are excellent indicator species to predict both quantity and quality of roadside wildlife habitat. Pheasants were introduced to Utah in the late 1800's. Populations climbed until pheasant habitat occupied 2-4 percent of the total land area in Utah. Populations began to decrease in the 1950's. Since 1962, pheasant populations in Cache County, Utah have dropped 2.71 percent annually. Experts believe the decline in pheasants is directly related to decreased habitat. They attribute the decrease to land use changes.
Cache County roadsides currently support 3,643 acres of wildlife habitat and have the potential to support over 15,000 acres. To evaluate roadside habitat in Cache County, a roadside vegetation inventory was conducted. This was done by conducting a windshield survey of Cache County roadsides in agricultural areas. Next, vegetation density was measured along roadside transects using a Daubenmire frame and vertical profile board.
The results showed Cache County roadsides did not support quality wildlife habitat. The exception was wetlands that contained significant stands of cattail. The evaluation found current maintenance practices of mowing and spraying roadside vegetation has degraded the plant communities and created dense monocultures of a few grass species.
A questionnaire was completed by county weed supervisors throughout the state of Utah as well as Utah Department of Transportation personnel and other people associated with the managment of roadside vegetation. The questionnaire provided information about current roadside maintenance practices and attitudes.
As a result of the roadside vegetation data and the questionnaire, the study determined that healthier roadside plant communities are possible if current maintenance practices and standards are modified. These modifications should include 1) spot spraying herbicide to eradicate weed species, 2) mowing only 10% of the right-of-way, which will provide more residual nesting cover in the unmowed areas, and 3) allowing woody vegetation along the backs! ope of ditches and other areas where motorist safety is not compromised. By modifying maintenance practices and implementing diverse seed mixes, roadside plant communities will support quality wildlife habitat.
title: Hydrogen Uptake Genes and Nitrogen Fixation Efficiency of Rhizobium Species in Symbiosis With Alfalfa, Chickpea and Pigeonpea
Creators: name: Sajid, G. Mustafa
Publisher: name: Utah State University
Year: 1991

description: The plasmids pDN211 and pDNll, isolated from the gene bank of the Rhizobium japonicum strain I-110, have been reported to complement two different Nif+ Hup· (nitrogen fixation positive and hydrogen uptake negative) mutants. A 5.9-kb Hindiii DNA fragment of the cosmid pHU52, isolated from the gene bank of R. japonicum strain 122DES, has been reported to code for the two polypeptide subunits of uptake hydrogenase. To determine homology between the structural genes of uptake hydrogenase of the two strains, a Southern blot of the Hindiii restriction fragments of the plasmids pDN211 and pDN11 was hybridized to the 5.9-kb Hindiii fragment. A 6.0-kb HindIII DNA fragment of pDN11 was observed to be homologous to the hup DNA probe. Thus, the hup genes of the two Rhizobium strains are conserved.
Colony hybridization with the 5.9-kb DNA as the probe was used to detect the homologous hup genes in alfalfa-, chickpea- and pigeonpea- Rhizobium species. These Rhizobium species were also successfully derepressed for uptake hydrogenase in free living conditions. It was found that 30% of the alfalfa-, 30% of the chickpea- and 21% of the pigeonpea- Rhizobium strains tested were Hup+ as determined by the methylene blue (MB) reduction assay. All but one strain of alfalfa- (Celpril Ind. 3623) and one strain of pigeonpea- Rhizobium (IC3282) that showed strong homology to the hup DNA probe also exhibited MB reduction activity.
The Hup+ strains of alfalfa- and pigeonpea- Rhizobium produced significantly higher yields as compared to the Hup- strains, whereas those of the chickpea-Rhizobium strains produced significantly lower yields as compared to the Hup- strains. Two of the alfalfa-Rhizobium strains, USDA1024 and CmRm~, exhibited Hup activities greater than any reported previously for this bacterial species. The cosmid-borne hup genes of R. japonicum were successfully expressed in all strains tested but the enzyme activities were very low in alfalfa-Rhizobium compared to those in chickpea- and pigeonpea-Rhizobium species. The relative efficiency of N2-fixation was significantly increased by the transfer of hup genes into the chickpea- and pigeonpea- Rhizobium strains.
Learning logical Pauli noise in quantum error correction
Creators: name: Wagner, Thomas
name: Kampermann, Hermann
name: Bruß, Dagmar
name: Kliesch, Martin
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The characterization of quantum devices is crucial for their practical implementation but can be costly in experimental effort and classical postprocessing. Therefore, it is desirable to measure only the information that is relevant for specific applications and develop protocols that require little additional effort. In this work, we focus on the characterization of quantum computers in the context of stabilizer quantum error correction. For arbitrary stabilizer codes, subsystem codes, and data syndrome codes, we prove that the logical error channel induced by Pauli noise can be estimated from syndrome data under minimal conditions. More precisely, for any such code, we show that the estimation is possible as long as the code can correct the noise.
description: 5+8 pages; v2: close to published version