cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
$R_{e^+ e^-}$ and an effective QCD charge
Creators: name: Gomez, J. D.
name: Natale, A. A.
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We consider the electron-positron annihilation process into hadrons $R_{e^+e^-}$ up to $\mathcal{O}(α_{s}^{3})$ and we adopt the smearing method suggest by Poggio, Quinn and Weinberg to confront the experimental data with theory. As a theoretical model we use a QCD coupling constant frozen in the low energy regime, where this coupling can be parameterised in terms of an effective dynamical gluon mass ($m_g$) which is determined through Schwinger-Dyson equations. In order to find the best fit between experimental data and theory we perform a $χ^2$ study, that, within the uncertainties of the approach, has a minimum value when $m_g/Λ_{QCD}$ is in the range $1.2 \, - \, 1.4$. These values are in agreement with other phenomenological determinations of this ratio and lead to an infrared effective charge $α_s(0) \approx 0.7$. We comment how this effective charge may affect the global duality mass scale that indicates the frontier between perturbative and non-perturbative physics.
description: 8 pages, 8 figures. Type and language correction. New references. Version to be published
Considering Time in Designing Large-Scale Systems for Scientific Computing
Creators: name: Chen, Nan-Chen
name: Poon, Sarah S.
name: Ramakrishnan, Lavanya
name: Aragon, Cecilia R.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: FOS: Computer and information sciences
subject: H.5.3

description: High performance computing (HPC) has driven collaborative science discovery for decades. Exascale computing platforms, currently in the design stage, will be deployed around 2022. The next generation of supercomputers is expected to utilize radically different computational paradigms, necessitating fundamental changes in how the community of scientific users will make the most efficient use of these powerful machines. However, there have been few studies of how scientists work with exascale or close-to-exascale HPC systems. Time as a metaphor is so pervasive in the discussions and valuation of computing within the HPC community that it is worthy of close study. We utilize time as a lens to conduct an ethnographic study of scientists interacting with HPC systems. We build upon recent CSCW work to consider temporal rhythms and collective time within the HPC sociotechnical ecosystem and provide considerations for future system design.
description: 13 pages, to be published in Proceedings of the ACM Conference on Computer Supported Cooperative Work 2016
MS Gr. class. c. 4 886
Creators: name: Oxyrhynchus Papyri
Publisher: name: University of Oxford
Year: 2023
Subjects: classificationCode: 470316
subject: Latin and classical Greek languages

description: P.Herc. 1056 fr. 2.2. Epicurus, De natura 25
Drawing by Giuseppe Casanova
Stakeholder Perceptions of Drupal Project Success
Creators: name: Thomas, Matthew O.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2010
Subjects: Computer software--Evaluation
Computer software--Drupal
Surveys--Internet
Administration--Project management

description: The purpose of this research was to collect descriptive data about Drupal projects and explore the relationships between various factors and perceived project success. Literature was examined to explore a variety of perspectives on project success. From this literature, a survey was developed. This survey was administered to a sample of Drupal project stakeholders. It collected information about Drupal expertise and experience level, asked respondents to consider their most recent Drupal project and answer questions about it, and asked respondents to rate characteristics of projects in terms of their association with project success and failure. The survey also collected qualitative data about stakeholder perceptions of project success. Results and implications of the research are discussed and suggestions for future research are presented.
Power-law and intermediate inflationary models in f(T)-gravity
Creators: name: Rezazadeh, K.
name: Abdolmaleki, A.
name: Karami, K.
Publisher: name: arXiv
Year: 2015
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We study inflation in the framework of $f(T)$-gravity in the presence of a canonical scalar field. After reviewing the basic equations governing the background cosmology in $f(T)$-gravity, we turn to study the cosmological perturbations and obtain the evolutionary equations for the scalar and tensor perturbations. Solving those equations, we find the power spectra for the scalar and tensor perturbations. Then, we consider a power-law form for the $f(T)$ function in the action and examine the inflationary models with the power-law and intermediate scale factors. We see that in contrast with the standard inflationary scenario based on the Einstein gravity, in the considered $f(T)$-gravity scenario, the power-law and intermediate inflationary models can be compatible with the observational results of Planck 2015 at 68\% CL. In our $f(T)$-gravity setting, the potentials responsible for both the power-law and intermediate inflationary models have the power-law form $V(ϕ) \propto {ϕ^m}$ but the power $m$ is different for them. Therefore, we can refine some of power-law inflationary potentials in the framework of $f(T)$-gravity while they are disfavored by the observational data in the standard inflationary scenario. Interestingly enough, the self-interacting quartic potential $V(ϕ) \propto {ϕ^4}$ which has special reheating properties, can be consistent with the Planck 2015 data in our $f(T)$-gravity scenario while it is ruled out in the standard inflationary scenario.
description: 30 pages, 3 figures
MS Gr. class. c. 4 887
Creators: name: Oxyrhynchus Papyri
Publisher: name: University of Oxford
Year: 2023
Subjects: classificationCode: 470316
subject: Latin and classical Greek languages

description: P.Herc. 1056 fr. 2.3. Epicurus, De natura 25
Drawing by Giuseppe Casanova
Acoustic Emission Study of Fatigue Crack Progression in Additive Manufactured Components
Creators: name: YAO, XINYUE
Publisher: name: Monash University
Year: 2023
Subjects: Mechanical engineering not elsewhere classified

description: Additive manufactured (or 3D printed) materials suffer from internal defects due to their production procedures. To ensure the safety of additive manufactured components, proper structural health monitoring methods are needed. This thesis shows the feasibility of acoustic emission testing in monitoring internal defects of additive manufactured components and studies waveform related features of collected activities. It also provides a deeper understanding of acoustic emission sources from pencil lead break signals and fatigue crack progressions.
Nonminimal black holes with regular electric field
Creators: name: Balakin, Alexander B.
name: Zayats, Alexei E.
Publisher: name: arXiv
Year: 2015
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We discuss the problem of identification of coupling constants, which describe interactions between photons and space-time curvature, using exact regular solutions to the extended equations of the nonminimal Einstein-Maxwell theory. We argue the idea that three nonminimal coupling constants in this theory can be reduced to the single guiding parameter, which plays the role of nonminimal radius. We base our consideration on two examples of exact solutions obtained earlier in our works: the first of them describes a nonminimal spherically symmetric object (star or black hole) with regular radial electric field; the second example represents a nonminimal Dirac-type object (monopole or black hole) with regular metric. We demonstrate that one of the inflexion points of the regular metric function identifies a specific nonminimal radius, thus marking the domain of dominance of nonminimal interactions.
description: 10 pages, 2 figures; based on talks presented at VII Black Holes Workshop, Aveiro, Portugal
Music Libraries and E-Readers: Perspectives from the Profession
Creators: name: McCall, Maria M.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2011
Subjects: Music libraries and collections
Electronic book readers
Music literature and scores

description: Purpose: The purpose of this study is to explore the intersection of music libraries and e-  readers by identifying key features, uses, and challenges of e-reader usage in the context  of music libraries.  Design/Methodology: This study surveyed 66 music librarian participants and analyzed  the most important features and challenges of the devices.  Findings: Findings showed that the variety of file formats supported is the most important  feature and that content availability and cost pose the most significant challenges.  Originality/Value: This study explores a new and developing area of library and  collections technology that has been minimally investigated at this point.
MS Gr. class. c. 4 888
Creators: name: Oxyrhynchus Papyri
Publisher: name: University of Oxford
Year: 2023
Subjects: classificationCode: 470316
subject: Latin and classical Greek languages

description: P.Herc. 1056 fr. 3.1. Epicurus, De natura 25
Drawing by Giuseppe Casanova
Spin-polarized supercurrents for spintronics: a review of current progress
Creators: name: Eschrig, M.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: During the past 15 years a new field has emerged, which combines superconductivity and spintronics, with the goal to pave a way for new types of devices for applications combining the virtues of both by offering the possibility of long-range spin-polarized supercurrents. Such supercurrents constitute a fruitful basis for the study of fundamental physics as they combine macroscopic quantum coherence with microscopic exchange interactions, spin selectivity, and spin transport. This report follows recent developments in the controlled creation of long-range equal-spin triplet supercurrents in ferromagnets and its contribution to spintronics. The mutual proximity-induced modification of order in superconductor-ferromagnet hybrid structures introduces in a natural way such evasive phenomena as triplet superconductivity, odd-frequency pairing, Fulde-Ferrell-Larkin-Ovchinnikov pairing, long-range equal-spin supercurrents, $π$-Josephson junctions, as well as long-range magnetic proximity effects. All these effects were rather exotic before 2000, when improvements in nanofabrication and materials control allowed for a new quality of hybrid structures. Guided by pioneering theoretical studies, experimental progress evolved rapidly, and since 2010 triplet supercurrents are routinely produced and observed. We have entered a new stage of studying new phases of matter previously out of our reach, and of merging the hitherto disparate fields of superconductivity and spintronics to a new research direction: super-spintronics.
description: 95 pages, 23 Figures; published version with minor typos corrected and few references added
Under The Dome: Doped holographic superconductors with broken translational symmetry
Creators: name: Baggioli, Matteo
name: Goykhman, Mikhail
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We comment on a simple way to accommodate translational symmetry breaking into the recently proposed holographic model which features a superconducting dome-shaped region on the temperature-doping phase diagram.
description: 14 pages, 6 figures
One-On-One: Learning the Art of Research Consultations
Creators: name: Saylor, Kodi
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2017
Subjects: Academic libraries--Reference services
Research Consultations
Reference interviews (Library science)

description: Research consultations are meetings between a patron and a librarian during which the librarian attempts to assist the patron with their information or research need. Many academic libraries have implemented research consultation services as part of the suite of reference services that their libraries offer. Outside of the reference interview model created for the traditional reference desk setting, no model has been put forth to provide guidance to librarians attempting to learn how to perform a research consultation, which can differ significantly from traditional reference desk interactions because of their intensive and personal nature. The ultimate goal of this study is to investigate how the librarians who provide research consultations learned their craft both in terms of their ability to conduct the more technical aspects of a research consultation and their ability to manage the affective elements of the research consultation.
Equation of State of Ultracold Fermions in the 2D BEC-BCS Crossover Region
Creators: name: Boettcher, I.
name: Bayha, L.
name: Kedar, D.
name: Murthy, P. A.
name: Neidig, M.
name: Ries, M. G.
name: Wenz, A. N.
name: Zürn, G.
name: Jochim, S.
name: Enss, T.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We report the experimental measurement of the equation of state of a two-dimensional Fermi gas with attractive s-wave interactions throughout the crossover from a weakly coupled Fermi gas to a Bose gas of tightly bound dimers as the interaction strength is varied. We demonstrate that interactions lead to a renormalization of the density of the Fermi gas by several orders of magnitude. We compare our data near the ground state and at finite temperature to predictions for both fermions and bosons from Quantum Monte Carlo simulations and Luttinger-Ward theory. Our results serve as input for investigations of close-to-equilibrium dynamics and transport in the two-dimensional system.
description: 6+7 pages, 3+3 figures, published version
A Study in Archival Collecting from Extremist Groups: An Investigation of Ku Klux Klan Holdings in the United States.
Creators: name: Titchener, Lynnwood E.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2011
Subjects: Ku Klux Klan
Archives
Special collections--Case studies

description: This study examines the quantity and placement of Ku Klux Klan materials among archival collections  in five academic libraries in the United States. I discuss the importance of collecting materials from hate  groups in the United States, with the Ku Klux Klan as an example, and explore challenges in outreach  and description. A comparison and analysis of Ku Klux Klan holdings in repositories reveals the current status of those materials and provides insight into how repositories and archivists confront controversial  research topics.
Homeless perspectives of the public library
Creators: name: Harvey, Aisha
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2002
Subjects: Public libraries--North Carolina
Libraries and the Homeless
Libraries and Communities

description: This paper presents the perceptions of five homeless library users of a public library. Homeless participants were interviewed in order to obtain information about both their perceptions of their own library activities and their perceptions of library service. The participant selection criterion was based on residence at the Durham Urban Ministries homeless shelter in Durham, NC and on evidence of use of the Central library of the Durham Public Library system. All participants answered several questions regarding their perceptions of this public library, frequency of use of the library and their current length of residency at Durham Urban Ministries homeless shelter.
Effective properties of periodic tubular structures
Creators: name: Godin, Yuri A.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences
subject: 35B27, 74E30, 74Q05, 78M40

description: A method is described to calculate effective tensor properties of a periodic array of two-phase dielectric tubes embedded in a host matrix. The method uses Weierstrass' quasiperodic functions for representation of the potential that considerably facilitates the problem and allows us to find an exact expression for the effective tensor. For weakly interacting tubes we obtain Maxwell-like approximation of the effective parameter which is in very good agreement with experimental results in considered examples.
description: 14 pages, 8 figures
MS Gr. class. c. 4 889
Creators: name: Oxyrhynchus Papyri
Publisher: name: University of Oxford
Year: 2023
Subjects: classificationCode: 470316
subject: Latin and classical Greek languages

description: P.Herc. 1056 fr. 3.2. Epicurus, De natura 25
Drawing by Giuseppe Casanova
Developing a System for Collecting, Storing, and Displaying Information for the Development Finance Initiative
Creators: name: Kashef, Omar
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2016
Subjects: Strategic information system
Business information services
Knowledge management

description: This master’s project was developed for the Development Finance Initiative (DFI), a program of the School of Government (SOG) at The University of North Carolina at Chapel Hill. The goal of this master’s project was to build a website to assist DFI track key project metrics, compare projects through those metrics, and develop an internal knowledge base that could lead to evidence-based practices for the redevelopment of a distressed community. Moreover, this master’s project is part of the greater push for standardization in DFI’s workflow and describes how an organization under twenty employees can develop a system for collecting, storing, and displaying key project metrics to better document the impact of the organization’s work.
Shortcuts to adiabatic holonomic quantum computation in decoherence-free subspace with transitionless quantum driving algorithm
Creators: name: Song, Xue-Ke
name: Zhang, Hao
name: Ai, Qing
name: Qiu, Jing
name: Deng, Fu-Guo
Publisher: name: arXiv
Year: 2015
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: By using transitionless quantum driving algorithm (TQDA), we present an efficient scheme for the shortcuts to the holonomic quantum computation (HQC). It works in decoherence-free subspace (DFS) and the adiabatic process can be speeded up in the shortest possible time. More interestingly, we give a physical implementation for our shortcuts to HQC with nitrogen-vacancy centers in diamonds dispersively coupled to a whispering-gallery mode microsphere cavity. It can be efficiently realized by controlling appropriately the frequencies of the external laser pulses. Also, our scheme has good scalability with more qubits. Different from previous works, we first use TQDA to realize a universal HQC in DFS, including not only two noncommuting accelerated single-qubit holonomic gates but also a accelerated two-qubit holonomic controlled-phase gate, which provides the necessary shortcuts for the complete set of gates required for universal quantum computation. Moreover, our experimentally realizable shortcuts require only two-body interactions, not four-body ones, and they work in the dispersive regime, which relax greatly the difficulty of their physical implementation in experiment. Our numerical calculations show that the present scheme is robust against decoherence with current experimental parameters.
description: 8 pages, 2 figures
MS Gr. class. c. 4 890
Creators: name: Oxyrhynchus Papyri
Publisher: name: University of Oxford
Year: 2023
Subjects: classificationCode: 470316
subject: Latin and classical Greek languages

description: P.Herc. 1056 fr. 3.3. Epicurus, De natura 25
Drawing by Giuseppe Casanova
Prospects for Neutron Star Equation of State Constraints using "Recycled" Millisecond Pulsars
Creators: name: Bogdanov, Slavko
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Rotation-powered "recycled" millisecond pulsars are a variety of rapidly-spinning neutron stars that typically show thermal X-ray radiation due to the heated surface of their magnetic polar caps. Detailed numerical modeling of the rotation-induced thermal X-ray pulsations observed from recycled millisecond pulsars, including all relevant relativistic and stellar atmospheric effects, has been identified as a promising approach towards an astrophysical determination of the true neutron star mass-radius relation, and by extension the state of cold matter at densities exceeding those of atomic nuclei. Herein, I review the basic model and methodology commonly used to extract information regarding neutron star structure from the pulsed X-ray radiation observed from millisecond pulsars. I also summarize the results of past X-ray observations of these objects and the prospects for precision neutron star mass-radius measurements with the upcoming Neutron Star Interior Composition Explorer (NICER) X-ray timing mission.
description: 8 pages, 7 figures; invited contribution to the European Physics Journal A topical issue on "Exotic Matter in Neutron Stars"
MS Gr. class. c. 4 891
Creators: name: Oxyrhynchus Papyri
Publisher: name: University of Oxford
Year: 2023
Subjects: classificationCode: 470316
subject: Latin and classical Greek languages

description: P.Herc. 1056 fr. 4.1. Epicurus, De natura 25
Drawing by Giuseppe Casanova
Sharing Research Data in the Social Sciences: The Role of Journal Policies
Creators: name: Lafferty-Hess, Sophia
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2014
Subjects: Periodicals
Data sharing
Social science archives

description: This paper explores the relationship between social science journal data sharing policies and online data availability. The study was conducted to understand the effectiveness of data sharing policies on influencing researchers to share their data.
Data availability for 65 articles published in social science journals with three types of data sharing policies (mandatory, recommended, or no policy) were examined. The study
also examined the type and location of the data. A low percentage of researchers were found to share their original research data and the majority who shared their data were bound by a mandatory data replication policy. These findings suggest that there is a
relationship between strong data sharing policies and the rate of data sharing. Journals can use these findings to inform decisions on maintaining, expanding, or enforcing policies.
Simulation of muon radiography for monitoring CO$_2$ stored in a geological reservoir
Creators: name: Klinger, J.
name: Clark, S. J.
name: Coleman, M.
name: Gluyas, J. G.
name: Kudryavtsev, V. A.
name: Lincoln, D. L.
name: Pal, S.
name: Paling, S. M.
name: Spooner, N. J. C.
name: Telfer, S.
name: Thompson, L. F.
name: Woodward, D.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Geophysics (physics.geo-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Current methods of monitoring subsurface CO$_2$, such as repeat seismic surveys, are episodic and require highly skilled personnel to acquire the data. Simulations based on simplified models have previously shown that muon radiography could be automated to continuously monitor CO$_2$ injection and migration, in addition to reducing the overall cost of monitoring. In this paper, we present a simulation of the monitoring of CO$_2$ plume evolution in a geological reservoir using muon radiography. The stratigraphy in the vicinity of a nominal test facility is modelled using geological data, and a numerical fluid flow model is used to describe the time evolution of the CO$_2$ plume. A planar detection region with a surface area of 1000 m$^2$ is considered, at a vertical depth of 776 m below the seabed. We find that one year of constant CO$_2$ injection leads to changes in the column density of $\lesssim 1\%$, and that the CO$_2$ plume is already resolvable with an exposure time of less than 50 days.
description: Accepted for publication in International Journal of Greenhouse Gas Control
MS Gr. class. c. 4 892
Creators: name: Oxyrhynchus Papyri
Publisher: name: University of Oxford
Year: 2023
Subjects: classificationCode: 470316
subject: Latin and classical Greek languages

description: P.Herc. 1056 fr. 4.2. Epicurus, De natura 25
Drawing by Giuseppe Casanova
Machaerophorus Schlechtendal 1857
Creators: name: Al-Shehbaz, Ihsan A.
name: Cano, Asunción
name: Manchego, Marco Antonio Cueva
name: Salariato, Diego L.
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Brassicales
Brassicaceae
Machaerophorus

description: Machaerophorus Schlechtendal (1857: 469).
Herbs suffrutescent perennial, or subshrubs, tomentose, becoming puberulent or glabrescent with age. Trichomes simple and branched, crisped, flattened, forming floccose-arachnoid cover on young branches. Multicellular glands absent. Stems erect to ascending, branched, flexuous, woody below, leafy, unarmed. Basal leaves not developed; cauline leaves petiolate, not auriculate at base, finely pinnatisect into narrowly linear lobes, usually grooved abaxially and densely pubescent along groves, fleshy, entire. Racemes ebracteate, many flowered, lax, elongated considerably in fruit; rachis strongly flexuous; mature flower buds narrowly oblong; fruiting pedicels ascending to divaricate, straight or slightly curved, sometimes secund, persistent. Sepals linear-oblong, free, deciduous, erect, equal, base of lateral pair not saccate; petals yellow or white, erect at claw and with flaring blade, longer than sepals; blade ovate to oblong or linear, apex obtuse to acute; claw strongly differentiated, longer than sepals, glabrous, unappendaged, entire; stamens 6, slightly exserted, erect, tetradynamous; filaments wingless, unappendaged, glabrous, free; anthers linear, not apiculate; nectar glands 2, lateral, V-shaped, with a lateral arm on each side, subtending bases of lateral stamens; median glands absent; ovules 24–70 per ovary; placentation parietal. Fruit dehiscent, capsular siliques, linear to oblong-lanceolate or lanceolate, terete or strongly latiseptate, not inflated, unsegmented; valves papery, obscurely veined, glabrous or puberulent, not keeled, smooth or torulose, wingless, unappendaged; gynophore absent or obsolete, rarely to 0.5 mm long; replum rounded, visible; septum complete, usually wrinkled between seeds, not veined; style obsolete or 0.5–6 mm long, persistent; stigma capitate or subconical, distinctly wider than style, unappendaged, strongly 2-lobed, the lobes opposite replum, connivent, not decurrent, densely papillate and stigma appearing entire. Seeds uniseriate or biseriate, margined or apiculate, wingless, oblong or ovate, plump or slightly flattened; seed coat minutely reticulate, mucilaginous when wetted; cotyledons incumbent.
A genus of three species endemic to southern Peru.
description: Published as part of Al-Shehbaz, Ihsan A., Cano, Asunción, Manchego, Marco Antonio Cueva & Salariato, Diego L., 2018, Remarkable discoveries in the long-neglected and Peruvian-endemic genus Machaerophorus (Brassicaceae), pp. 114-124 in Phytotaxa 360 (2) on page 116, DOI: 10.11646/phytotaxa.360.2.3, http://zenodo.org/record/13703822
The development of a web-based commercial vehicle tracking and maintenance system
Creators: name: Argue, Bradley C.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2001
Subjects: Information system--Design
Database management systems
Web databases

description: This project designed and developed a system for web-enabling an existing technological device that captures data from commercial vehicle engines. A company based in South Carolina will use the prototype generated by this project for demonstration purposes and as a basis for future product development. Development of the demonstration system required defining processes for packing and transporting data from the vehicle to the web server, coding a custom TCP server, and constructing a database and web-based user interface for viewing the data.
Fröhlich electron-phonon vertex from first principles
Creators: name: Verdi, Carla
name: Giustino, Feliciano
Publisher: name: arXiv
Year: 2015
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We develop a method for calculating the electron-phonon vertex in polar semiconductors and insulators from first principles. The present formalism generalizes the Fröhlich vertex to the case of anisotropic materials and multiple phonon branches, and can be used either as a post-processing correction to standard electron-phonon calculations, or in conjunction with {\it ab initio} interpolation based on maximally localized Wannier functions. We demonstrate this formalism by investigating the electron-phonon interactions in anatase TiO$_2$, and show that the polar vertex significantly reduces the electron lifetimes and enhances the anisotropy of the coupling. The present work enables {\it ab initio} calculations of carrier mobilities, lifetimes, mass enhancement, and pairing in polar materials.
Impact of 15 Jan 2010 annular solar eclipse on the equatorial and low latitude ionosphere over Indian region from Magnetometer, Ionosonde and GPS observations
Creators: name: Panda, Sampad Kumar
name: Gedam, Shirish S.
name: Rajaram, Girija
name: Sripathi, Samireddipalle
name: Bhaskar, Ankush
Publisher: name: arXiv
Year: 2015
Subjects: subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: The annular eclipse of Jan 15, 2010 over southern India was studied with a network of multi-instrumental observations consisting magnetometer, ionosonde and GPS receivers. By selecting the day before and the normal EEJ days as the control days, it is intrinsically proved that the regular eastward electric field for the whole day at the equator was not just weakened but actually was flipped for several hours by the influence of tides related to the spectacular Sun-Moon-Earth alignment near the middle of the day. The effect of flipping the electric field was clearly seen in the equatorial ionosonde data and through the large array of GPS receivers that accomplished the TEC data. The main impact of the change in the electric field was the reduced EIA at all latitudes, with the anomaly crest that shifted towards the equator. The equatorial F-region density profile was also showing an enhanced F region peak in spite of a reduced VTEC. By comparison to the plasma density depletion associated with the temporary lack of photo-ionization during the episode of eclipse, the electrodynamical consequences of the eclipse were far more important and influenced the plasma density over a wide range of latitudes.
description: 45 pages, 8 figures
MS Gr. class. c. 4 893
Creators: name: Oxyrhynchus Papyri
Publisher: name: University of Oxford
Year: 2023
Subjects: classificationCode: 470316
subject: Latin and classical Greek languages

description: P.Herc. 1056 fr. 4.3. Epicurus, De natura 25
Drawing by Giuseppe Casanova
Inequality measures in kinetic exchange models of wealth distributions
Creators: name: Ghosh, Asim
name: Chatterjee, Arnab
name: Inoue, Jun-ichi
name: Chakrabarti, Bikas K.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Physics and Society (physics.soc-ph)
subject: General Finance (q-fin.GN)
subject: FOS: Physical sciences
subject: FOS: Economics and business

description: In this paper, we study the inequality indices for some models of wealth exchange. We calculated Gini index and newly introduced k-index and compare the results with reported empirical data available for different countries. We have found lower and upper bounds for the indices and discuss the efficiencies of the models. Some exact analytical calculations are given for a few cases. We also exactly compute the quantities for Gamma and double Gamma distributions.
description: 10 pages, 7 figures; accepted in Physica A
Reflection positivity in simplicial gravity
Creators: name: Schrader, Robert
Publisher: name: arXiv
Year: 2015
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: 81T08 (Primary), 81T25, 83C27 (Secondary)

description: Within the context of piecewise linear manifolds we establish reflection positivity with a Hilbert action given in terms of the Regge curvature and a cosmological term. Using this positivity a Hilbert space for a quantum theory is constructed and some field operators and observables are given. The set-up allows to introduce time reversal though no time exists. All constructions are non-perturbative.
description: 16 pages
A Framework for Analyzing Electronic Communication: Bales' Interaction Process Categories and a Community of Practice
Creators: name: Choi, Junghee
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2003
Subjects: Statistical Analysis SAS
Community of Practice Social Aspects
Relational Database System Database
Bales' Interaction Process Category Research
Electronic Communication Interaction Research

description: This paper describes and evaluates a tool developed to analyze communication interaction of Newslib LISTSERV using Bales' Interaction Process Category. In this study, Microsoft ACCESS was used for managing data and SAS Enterprise Guide was used for performing the statistical analysis and representing their results. The purpose of analyzing Newslib LISTSERV is to determine if there is evidence that this LISTSERV helps to create and reinforce a "community of practice" among the special librarians who work in a variety of News organizations. The results show that this group behaves as a community of practice by interchanging information or knowledge actively in their domains. The ACCESS relational database system is suitable for this study to organize and manipulate data because the relationship between entities needs to be modeled. The SAS Enterprise Guide is very useful to perform statistical analysis and represent results with new features such as the GUI interface and automatic output delivery system.
MS Gr. class. c. 4 894
Creators: name: Oxyrhynchus Papyri
Publisher: name: University of Oxford
Year: 2023
Subjects: classificationCode: 470316
subject: Latin and classical Greek languages

description: P.Herc. 1056 fr. 4.4. Epicurus, De natura 25
Drawing by Giuseppe Casanova
Topological Rice-Mele model in an emergent lattice: Exact diagonalization approach
Creators: name: Biedroń, Krzysztof
name: Dutta, Omjyoti
name: Zakrzewski, Jakub
Publisher: name: arXiv
Year: 2015
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: Using exact diagonalization methods we study possible phases in a one dimensional model of two differently populated fermionic species in a periodically driven optical lattice. The shaking amplitude and frequency are chosen to resonantly drive $s-p$ transition while minimizing the standard intraband tunnelings. We numerically verify that in the vicinity of vanishing intraband tunnelings the system, for an appropriate filling, shows an emergent density wave configuration of composites. The majority fermions moving in such a lattice mimic the celebrated Rice-Mele model. Far away from that region structure changes to clustered phase, with intermediate phase abundantly populated by defects of the density wave. These defects lead to loclaized modes carrying fractional particle charge. The results obtained are compared with earlier mean field approximation predictions.
description: revised version, 1 figure more
Framing a Future Vision of Partner Services: Pathways for Enhancing Value and Impact
Creators: name: Broussard, Dawn
Publisher: name: University of Illinois at Chicago
Year: 2023
Subjects: subject: 111799 Public Health and Health Services not elsewhere classified
subject: FOS: Health sciences

description: Sexually transmitted infections (STIs) in the United States are at epidemic proportions, with 2.5 million cases – the largest number on record -- reported in 2019. (Centers for Disease Control and Prevention, 2021) Partner services, a specific form of contact tracing focused on sexual partners, is a longstanding intervention for STI prevention. Today’s partner services programs are challenged by low levels of acceptance by clients. Lessons learned from the COVID-19 pandemic and new investments in the disease intervention workforce as a result of the American Recovery Plan Act are affording an opportune moment for CDC and partner services programs to adapt to changes in the environment and to further partner services practice and impact.
MS Gr. class. c. 4 895
Creators: name: Oxyrhynchus Papyri
Publisher: name: University of Oxford
Year: 2023
Subjects: classificationCode: 470316
subject: Latin and classical Greek languages

description: P.Herc. 1056 fr. 5.1. Epicurus, De natura 25
Drawing by Giuseppe Casanova
Phenomenological Investigation of African American Women in Information Technology Upper Management
Creators: name: Edwards, Leondra
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2013
Subjects: Information technology--Management

description: A qualitative phenomenological study investigated the challenges faced by African American women pursuing upper management positions in the field of Information Technology. The study detailed the subjects' experiences of achieving their goals of upper management, including their reflections and sentiments on pursuing their goals.
The research findings indicated a number of factors contributed to the advancement of the subjects, all African American women, as they moved into upper management. No distinct underlying factor guaranteed success; instead, the women used a number of elements that enabled them to advance. These factors included mentoring, education, and individual personality traits.  The study also found a number of challenges that affected the subjects' progress into management, such as performance weariness, keeping their thoughts and ideas under restraint, and remaining compliant; nevertheless, the subjects reported they found ways to advance regardless of hostile workplace circumstances.
Frequency-tunable Superconducting Resonators via Nonlinear Kinetic Inductance
Creators: name: Vissers, Michael R.
name: Hubmayr, Johannes
name: Sandberg, Martin
name: Chaudhuri, Saptarshi
name: Bockstiegel, Clint
name: Gao, Jiansong
Publisher: name: arXiv
Year: 2015
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We have designed, fabricated and tested a frequency-tunable high-Q superconducting resonator made from a niobium titanium nitride film. The frequency tunability is achieved by injecting a DC current through a current-directing circuit into the nonlinear inductor whose kinetic inductance is current-dependent. We have demonstrated continuous tuning of the resonance frequency in a 180 MHz frequency range around 4.5 GHz while maintaining the high internal quality factor $Q_i> 180,000$. This device may serve as a tunable filter and find applications in superconducting quantum computing and measurement. It also provides a useful tool to study the nonlinear response of a superconductor. In addition, it may be developed into techniques for measurement of the complex impedance of a superconductor at its transition temperature and for readout of transition-edge sensors.
description: 10 pages, 4 figures
MS Gr. class. c. 4 896
Creators: name: Oxyrhynchus Papyri
Publisher: name: University of Oxford
Year: 2023
Subjects: classificationCode: 470316
subject: Latin and classical Greek languages

description: P.Herc. 1056 fr. 5.2. Epicurus, De natura 25
Drawing by Giuseppe Casanova
The Delphi: Insecticide Use and Lint Yields, Beltwide Boll Weevil/Cotton Insect Management Programs (Appendix E)
Creators: name: Reichelderfer, Katherine
name: Natural Resource Economics Division, Economic Research Service
name: Reichelderfer, Katherine
name: Natural Resource Economics Division, Economic Research Service
Publisher: name: Unknown
Year: 1981
Subjects: Crop Production/Industries
Production Economics
Productivity Analysis
Research and Development/Tech Change/Emerging Technologies
Research Methods/ Statistical Methods

description: The Delphi, a method for systematic collection of information from experts, was modified to obtain biological data required for the economic analysis of boll weevil/cotton insect management programs. Cotton insect management and crop production experts provided detailed data regarding the insecticide use patterns and cotton lint yields they projected would result under each of five alternative insect management options, in 35 subregions of cotton production. These data were used to estimate average insecticide use and cotton lint yield of six boll weevil/cotton insect management programs. Producers' average insect control costs under each program also were calculated from the information provided by the Delphi experts.
description: The Delphi project received overall administration from Velmar Davis, ESS. This report was primarily prepared by Katherine Reichelderfer, ESS. Contributions to its preparation also were provided by Gerald Carlson (North Carolina State University), Herman Delvo (ESS), Dave Parvin (Mississippi State University), John Schaub (ESS), and Irving Starbird (ESS). In cooperation with Southern State Departments of Agriculture, Agricultural Experiment Stations, and Cooperative Extension Services.
Leisure reading materials and urban adolescents: Do school libraries collect for these readers?
Creators: name: Borowski, Victoria J.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2009
Subjects: School libraries--North Carolina
Reading--Leisure reading
Libraries and teenagers
Teenagers--Books and reading--United States
Urban libraries
Reading--Preferences

description: Literacy rates of urban adolescents are staggeringly low in comparison with that of their peers. Forty-three percent of urban 8th graders scored Below Basic on one national reading test as compared with only 24 percent in suburban and 25 percent in rural regions Research shows a link between the leisure reading habits of adolescents, and reading attitude and performance. Because of this link, ensuring that students living in low-income urban communities have access to materials they are interested in is key to encouraging reading, and consequently improving their reading performance. Using a list of leisure materials that have been found to be of interest to urban adolescents, 20 school library media center collections in an urban community in North Carolina were analyzed to see if these materials were within the school library collection.
Sourcing semiclassical gravity from spontaneously localized quantum matter
Creators: name: Tilloy, Antoine
name: Diósi, Lajos
Publisher: name: arXiv
Year: 2015
Subjects: subject: Quantum Physics (quant-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The possibility that a classical space-time and quantum matter cohabit at the deepest level, i.e. the possibility of having a fundamental and not phenomenological semiclassical gravity, is often disregarded for lack of a good candidate theory. The standard semiclassical theory suffers from fundamental inconsistencies (e.g.: Schrödinger cat sources, faster-than-light communication and violation of the Born rule) which can only be ignored in simple typical situations. We harness the power of spontaneous localization models, historically constructed to solve the measurement problem in quantum mechanics, to build a consistent theory of (stochastic) semiclassical gravity in the Newtonian limit. Our model makes quantitative and potentially testable predictions: we recover the Newtonian pair potential up to a short distance cut-off (hence we predict no 1 particle self-interaction) and uncover an additional gravitational decoherence term which depends on the specifics of the underlying spontaneous localization model considered. We hint at a possible program to go past the Newtonian limit, towards a consistent general relativistic semiclassical gravity.
description: 9 pages + refs, 1 figure, typos corrected and minor modifications
Grupos privados, confesiones públicas y movimientos masivos: El impacto de la narrativa confesional en la marcha "Ni una menos" en el Perú
Creators: name: Saona, Margarita
Publisher: name: University of Illinois at Chicago
Year: 2023
Subjects: subject: 130201 Creative Arts, Media and Communication Curriculum and Pedagogy
subject: FOS: Educational sciences
subject: Digital Humanities
subject: 220306 Feminist Theory
subject: FOS: Philosophy, ethics and religion
subject: Gender studies
subject: 210308 Latin American History
subject: FOS: History and archaeology
subject: Literature

description: LA marcha "Ni una menos" del 13 de agosto del 2016 en el Perú alcanzó niveles de participación popular sin precedentes. Los diarios reportaron cifras que oscilaban entre los "cientos de miles" y el "medio millón"; (Alvitres; Brieger; Fowks et al.). En este ensayo exploro la manera en la que los testimonios de experiencias de violencia sexual en un grupo privado de Facebook impactaron a la sociedad peruana, impulsando un movimiento en defensa de las mujeres nunca antes visto en el país.
Non-perturbative improvement of the vector current in Wilson lattice QCD
Creators: name: Harris, Tim
name: Meyer, Harvey B.
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: Many observables of interest in lattice QCD are extracted from correlation functions involving the vector current. If Wilson fermions are used, it is therefore of practical importance that, besides the action, the current be O($a$) improved in order to remove the leading discretization errors from the observables. Here we introduce and apply a new method to determine the improvement coefficient for the two most widely used discretizations of the current.
description: 12 pages, 5 figures
Real-time feedback from iterative electronic structure calculations
Creators: name: Vaucher, Alain C.
name: Haag, Moritz P.
name: Reiher, Markus
Publisher: name: arXiv
Year: 2015
Subjects: subject: Computational Physics (physics.comp-ph)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: Real-time feedback from iterative electronic structure calculations requires to mediate between the inherently unpredictable execution times of the iterative algorithm employed and the necessity to provide data in fixed and short time intervals for real-time rendering. We introduce the concept of a mediator as a component able to deal with infrequent and unpredictable reference data to generate reliable feedback. In the context of real-time quantum chemistry, the mediator takes the form of a surrogate potential that has the same local shape as the first-principles potential and can be evaluated efficiently to deliver atomic forces as real-time feedback. The surrogate potential is updated continuously by electronic structure calculations and guarantees to provide a reliable response to the operator for any molecular structure. To demonstrate the application of iterative electronic structure methods in real-time reactivity exploration, we implement self-consistent semi-empirical methods as the data source and apply the surrogate-potential mediator to deliver reliable real-time feedback.
description: 9 pages, 10 figures, 2 tables