cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Machine Learning and Cosmological Simulations I: Semi-Analytical Models
Creators: name: Kamdar, Harshil M.
name: Turk, Matthew J.
name: Brunner, Robert J.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present a new exploratory framework to model galaxy formation and evolution in a hierarchical universe by using machine learning (ML). Our motivations are two-fold: (1) presenting a new, promising technique to study galaxy formation, and (2) quantitatively analyzing the extent of the influence of dark matter halo properties on galaxies in the backdrop of semi-analytical models (SAMs). We use the influential Millennium Simulation and the corresponding Munich SAM to train and test various sophisticated machine learning algorithms (k-Nearest Neighbors, decision trees, random forests and extremely randomized trees). By using only essential dark matter halo physical properties for haloes of $M>10^{12} M_{\odot}$ and a partial merger tree, our model predicts the hot gas mass, cold gas mass, bulge mass, total stellar mass, black hole mass and cooling radius at z = 0 for each central galaxy in a dark matter halo for the Millennium run. Our results provide a unique and powerful phenomenological framework to explore the galaxy-halo connection that is built upon SAMs and demonstrably place ML as a promising and a computationally efficient tool to study small-scale structure formation.
description: Accepted for publication in MNRAS. 19 pages, 20 figures, 4 tables
title: Brown tumour and its differential diagnosis: Challenges in radiological evaluation
Creators: name: Chandak, Shruti
Publisher: name: EURORAD
Year: 2023
Subjects: subject: Musculoskeletal system
subject: Musculoskeletal bone
subject: Musculoskeletal system
subject: CT
subject: Digital radiography
subject: Clinical Cases

description: Clinical History: A 35-year-old female patient presented with shortness of breath since one year and chest pain radiating to the right shoulder since three months. There was no history of trauma, fever, hypertension or diabetes mellitus.

description: 35 years, female
MS Gr. class. c. 4 914
Creators: name: Oxyrhynchus Papyri
Publisher: name: University of Oxford
Year: 2023
Subjects: classificationCode: 470316
subject: Latin and classical Greek languages

description: P.Herc. 1061 col. 10 col. 9. Demetrius Laco, De geometria
Drawing by Giuseppe (?) Casanova
A Tale of Two Types of Perspective Taking: Sex Differences in Spatial Ability
Creators: name: Tarampi, Margaret
Publisher: name: Open Science Framework
Year: 2022

description: Social and spatial testing instructions for the Object Perspective/Spatial Orientation Test (SOT; Hegarty & Waller, 2004), and the Money Standardized Test of Direction Sense (MRM; Money et al., 1965; modifed by Zacks et al., 2002) as well as social and spatial versions of the SOT and MRM corresponding to Experiments 1-3 of A Tale of Two Types of Perspective Taking: Sex Differences in Spatial Ability by Margaret Tarampi, Nahal Heydari and Mary Hegarty
Dynamical current-induced ferromagnetic and antiferromagnetic resonances
Creators: name: Guimarães, F. S. M.
name: Lounis, S.
name: Costa, A. T.
name: Muniz, R. B.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We demonstrate that ferromagnetic and antiferromagnetic excitations can be triggered by the dynamical spin accumulations induced by the bulk and surface contributions of the spin Hall effect. Due to the spin-orbit interaction, a time-dependent spin density is generated by an oscillatory electric field applied parallel to the atomic planes of Fe/W(110) multilayers. For symmetric trilayers of Fe/W/Fe in which the Fe layers are ferromagnetically coupled, we demonstrate that only the collective out-of-phase precession mode is excited, while the uniform (in-phase) mode remains silent. When they are antiferromagnetically coupled, the oscillatory electric field sets the Fe magnetizations into elliptical precession motions with opposite angular velocities. The manipulation of different collective spin-wave dynamical modes through the engineering of the multilayers and their thicknesses may be used to develop ultrafast spintronics devices. Our work provides a general framework that probes the realistic responses of materials in the time or frequency domain.
description: 5 pages, 4 figures
MS Gr. class. c. 4 915
Creators: name: Oxyrhynchus Papyri
Publisher: name: University of Oxford
Year: 2023
Subjects: classificationCode: 470316
subject: Latin and classical Greek languages

description: P.Herc. 1061 col. 8. Demetrius Laco, De geometria
Drawing by Giuseppe (?) Casanova
The range and nature of effective interactions in hard-sphere solids
Creators: name: Schindler, Michael
name: Maggs, A. C.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: Colloidal systems observed in video microscopy are often analysed using the displacements correlation matrix of particle positions. In non-thermal systems, the inverse of this matrix can be interpreted as a pair-interaction potential between particles. If the system is thermally agitated, however, only an effective interaction is accessible from the correlation matrix. We show how this effective interaction differs from the non-thermal case by comparing with high-statistics numerical data from hard-sphere crystals.
description: 12 pages, 10 figures, Soft Matter 2016
A Quantum Dipolar Spin Liquid
Creators: name: Yao, Norman Y.
name: Zaletel, Michael P.
name: Stamper-Kurn, Dan M.
name: Vishwanath, Ashvin
Publisher: name: arXiv
Year: 2015
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: Quantum spin liquids are a new class of magnetic ground state in which spins are quantum mechanically entangled over macroscopic scales. Motivated by recent advances in the control of polar molecules, we show that dipolar interactions between S=1/2 moments stabilize spin liquids on the triangular and kagome lattices. In the latter case, the moments spontaneously break time-reversal, forming a chiral spin liquid with robust edge modes and emergent semions. We propose a simple route toward synthesizing a dipolar Heisenberg antiferromagnet from lattice-trapped polar molecules using only a single pair of rotational states and a constant electric field.
description: 11 pages, 8 figures
MS Gr. class. c. 4 916
Creators: name: Oxyrhynchus Papyri
Publisher: name: University of Oxford
Year: 2023
Subjects: classificationCode: 470316
subject: Latin and classical Greek languages

description: P.Herc. 1061 subscriptio. Demetrius Laco, De geometria
Drawing by Giuseppe (?) Casanova
A Lagrangian effective field theory
Creators: name: Vlah, Zvonimir
name: White, Martin
name: Aviles, Alejandro
Publisher: name: arXiv
Year: 2015
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We have continued the development of Lagrangian, cosmological perturbation theory for the low-order correlators of the matter density field. We provide a new route to understanding how the effective field theory (EFT) of large-scale structure can be formulated in the Lagrandian framework and a new resummation scheme, comparing our results to earlier work and to a series of high-resolution N-body simulations in both Fourier and configuration space. The `new' terms arising from EFT serve to tame the dependence of perturbation theory on small-scale physics and improve agreement with simulations (though with an additional free parameter). We find that all of our models fare well on scales larger than about two to three times the non-linear scale, but fail as the non-linear scale is approached. This is slightly less reach than has been seen previously. At low redshift the Lagrangian model fares as well as EFT in its Eulerian formulation, but at higher $z$ the Eulerian EFT fits the data to smaller scales than resummed, Lagrangian EFT. All the perturbative models fare better than linear theory.
description: 19 pages, 3 figures
Libraries in Litigation: The Role of Procedural and Jurisdictional Rules in Large-Scale Copyright Use Cases
Creators: name: Hansen, David R.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2012
Subjects: Copyright--Digital media
Copyright infringement
Libraries & state
Library legislation
Authorship

description: This paper examines the application of federal procedural, jurisdictional, and substantive rules that apply to libraries and their adversaries in determining their appropriate role as plaintiff or defendant in copyright litigation. In recent years, libraries and their host institutions have been called into court to answer complaints of copyright infringement for large-scale uses of copyrighted works. Associations, class representatives, and publishers represent copyright owners' interests as plaintiffs, while libraries and universities act on behalf of the interests of users as defendants. These proxy-representations implicate complex areas of federal jurisdictional, procedural, and substantive rules that are not well understood in this setting. This paper explains the importance of those rules in the context of libraries and the roles that they have traditionally filled with respect to users, and suggests clarifications that would maintain the position of appropriate parties as litigants, while leaving others to seek relief through legislation or other avenues.
Kress Fellows for Applied Research at the Ackland Art Museum: A Case Study of Collaboration
Creators: name: Tinsley, Maryellen G.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2012
Subjects: Collaboration
Case studies
Museums

description: The Kress Fellows for Applied Research project at the Ackland Art Museum has provided three graduate students, from the Art Department, the School of Education, and the School of Library and Information science, with unique opportunities to collaborate in a museum environment and to learn ways in which seemingly different professions can benefit from working together. The collaborative effort is the topic of this case study examining driving forces and motivations for collaboration between information professionals, educators, museums, and other interested parties.  Many instances of collaboration are driven by shared administration, interests or values as defined by Günter Waibel in his work entitled Collaboration Contexts: Framing Local, Group and Global Solutions, which offered the basis for analysis of previous collaborative efforts involving libraries, museums, and educators and also sheds light on the current collaborative project taking place at the Ackland Art Museum.
Two betweenness centrality measures based on Randomized Shortest Paths
Creators: name: Kivimäki, Ilkka
name: Lebichot, Bertrand
name: Saramäki, Jari
name: Saerens, Marco
Publisher: name: arXiv
Year: 2015
Subjects: subject: Social and Information Networks (cs.SI)
subject: Data Structures and Algorithms (cs.DS)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: This paper introduces two new closely related betweenness centrality measures based on the Randomized Shortest Paths (RSP) framework, which fill a gap between traditional network centrality measures based on shortest paths and more recent methods considering random walks or current flows. The framework defines Boltzmann probability distributions over paths of the network which focus on the shortest paths, but also take into account longer paths depending on an inverse temperature parameter. RSP's have previously proven to be useful in defining distance measures on networks. In this work we study their utility in quantifying the importance of the nodes of a network. The proposed RSP betweenness centralities combine, in an optimal way, the ideas of using the shortest and purely random paths for analysing the roles of network nodes, avoiding issues involving these two paradigms. We present the derivations of these measures and how they can be computed in an efficient way. In addition, we show with real world examples the potential of the RSP betweenness centralities in identifying interesting nodes of a network that more traditional methods might fail to notice.
description: Minor updates; published in Scientific Reports
MS Gr. class. c. 4 918
Creators: name: Oxyrhynchus Papyri
Publisher: name: University of Oxford
Year: 2023
Subjects: classificationCode: 470316
subject: Latin and classical Greek languages

description: P.Herc. 1065 col. 1. Philodemus, De signis
Drawing by Gennaro Casanova
Normierung von Verlagsdaten mit Wikidata - offen und mit Hilfe der Community!
Creators: name: Hikl, Anna Laetitia
name: Ulrych, Ursula
name: Achleitner, Michaela
name: Danowski, Patrick
name: Erlinger, Christian
name: Formanek, Daniel
name: Hubweber, Johanna
name: Hölbling, Lothar
name: Kranewitter, Michael
name: Rösel, Martin
name: Zojer, Michael
Publisher: name: Zenodo
Year: 2023
Subjects: Wikidata
Verlagsdaten
Normierung
AT2OA²
Imprints

description: Im dynamischen Feld des Verlagswesens den Überblick zu behalten ist eine riesige Herausforderung. Es gibt permanent Veränderungen, Wechsel und Übernahmen und bis dato fehlen in diesem Bereich verlässliche Metadaten. Eine kleine Arbeitsgruppe des nationalen Projekts Austrian Transition to Open Access Two (AT2OA²)* hat sich vor einem Jahr dazu entschlossen, diese Lücke zu schließen und die Verlagsdatennormierung in Angriff zu nehmen. Ein zentrales Element von AT2OA² ist der „Austrian Datahub for Open Access Negotiations and Monitoring", der als OA Monitor konzipiert ist. Zusätzlich soll der Datahub Verhandlungen von Open Access Agreements unterstützen, was die Normierung von Verlagsdaten sehr bald in den Fokus der Arbeiten gerückt hat. In diesem Zusammenhang war es uns ein Anliegen, nicht nur eine Momentaufnahme festzuhalten, sondern die Entwicklung des Publikationsaufkommens eines bestimmten Verlags abbilden und vergleichen zu können (Thema Imprints). Mit Wikidata ist es möglich, genau diese Aspekte wie Parent-Child-Relations darzustellen und mit einer Zeitrelation zu verknüpfen. Zusätzlich haben uns erfolgreiche Beispiele wie die Wikidata ID und die Möglichkeit, vollkommen kollaborativ zu arbeiten überzeugt, unsere Projektidee mit Wikidata umzusetzen. Nach extrem positiven Gesprächen mit Wikimedia Austria, Wikimedia Deutschland sowie regem Austausch mit den Kolleg*innen des OA Monitor Deutschland, haben im März 2023 die ersten Arbeiten in Wikidata gestartet. Im Zuge eines internen Workshops wurde auf der Projektseite unter anderem bereits unser Datenmodell dokumentiert. Wir hoffen, auf diesem Weg eine breite Community zu erreichen und zur Mitarbeit zu motivieren, um die herausfordernde Aufgabe der Normierung von Verlagsdaten gemeinsam bewältigen zu können! https://www.wikidata.org/wiki/Wikidata:WikiProject_Academic_Publisher *Das Projekt AT2OA² hat das Ziel, zur Transformation von Closed zu Open Access in der wissenschaftlichen Kommunikation beizutragen und unterstützende Maßnahmen umzusetzen
Centralized Adaptation for Parameter Estimation over Wireless Sensor Networks
Creators: name: Abdolee, Reza
name: Champagne, Benoit
Publisher: name: arXiv
Year: 2015
Subjects: subject: Systems and Control (eess.SY)
subject: Optimization and Control (math.OC)
subject: Applications (stat.AP)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Mathematics
subject: FOS: Computer and information sciences

description: We study the performance of centralized least mean-squares (CLMS) algorithms in wireless sensor networks where nodes transmit their data over fading channels to a central processing unit (e.g., fusion center or cluster head), for parameter estimation. Wireless channel impairments, including fading and path loss, distort the transmitted data, cause link failure and degrade the performance of the adaptive solutions. To address this problem, we propose a novel CLMS algorithm that uses a refined version of the transmitted data and benefits from a link failure alarm strategy to discard severely distorted data. Furthermore, to remove the bias due to communication noise from the estimate, we introduce a bias-elimination scheme that also leads to a lower steady-state mean-square error. Our theoretical findings are supported by numerical simulation results.
description: IEEE Communication Letter, 2015
The Role of Conflict and Conflict Management/Resolution in Face to Face and Remote Collaboration: A Content Analysis of a Controlled Experiment
Creators: name: Phillips, Andrew L.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2004
Subjects: Collaboration
Conflict Resolution
Conflict

description: Collaborating effectively is essential in getting work done. Regardless of physical location, being able to effectively communicate ideas and tasks to one another is essential in completing successful work. The objective of the study is to observe conflict and conflict management techniques and see how they affect a group's ability to produce good work. The study is a content analysis of video and audio produced by a separate study conducted by researchers at the University of North Carolina at Chapel Hill. The UNC study focused on the relationship between the lab environment (face to face vs. remote) of a scientific experiment and the quality of the lab reports produced. The tapes from the UNC study were coded according to a coding system devised to capture types of conflict and types of conflict management/resolution techniques. Descriptive statistics taken from the coding were compared to lab grades to infer possible affects that conflict and conflict management/resolution may have on the final lab grades.
Leontodon albanicus F. Conti
Creators: name: Conti, Fabio
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Asterales
Asteraceae
Leontodon
Leontodon albanicus

description: Leontodon albanicus (F.K.Meyer) F. Conti, comb. & stat. nov. (Figs. 1–2)
 Basionym:— Leontodon incanus subsp. albanicus Meyer (2011: 170).
 Type:— ALBANIA. Mali i Gjer (Mali Gjinezh), zwischen Qafa Gradishtit und Qafa Piloit, ca. 1400 m, 26 June 1959, F. K.Meyer 3397 (holotype JE, [digital image]!).
 Emended description:—Perennial with a taproot and 1 unbranched stem up to ca. 20 cm tall. Stem ribbed with short stalked 5–9-fid hairs; bracts 0–3. Basal leaves rosulate, 40–130 × 5–30 mm, oblanceolate, sinuate-dentate, greyishgreen, with dense, stalked (4–) 8 (–9)-fid hairs on both surfaces. Capitulum solitary. Involucre 13–22 mm, phyllaries linear-lanceolate, in several rows, outer with sparse to dense flexuose long stalked 2–8-fid hairs, pectinate-ciliate with stellate hairs in the upper part. Ligules yellow. Achene 5–6 mm with minute rigid hairs above, narrowed towards apex. Pappus off-white, 9–11 mm long, denticulate or plumose with a few longer hairs 0.4–0.6 mm. Flowering from end of May to beginning of July, fruiting in July.
 Distribution and habitat:—The species is endemic to southern Albania and Greece, in a restricted area. It is known from Gjirokastër district (Rrethi i Gjirokastrës) near Fushë Bardhë and Mt. Nëmerçkë.
 Additional specimens examined:— ALBANIA. District of Gjirokastër (Rrethi i Gjirokastrës); above the valley of brook “Pirdu” near Fushë Bardhë, between pass Dardhë and Mt Lucë; in deciduos forest, on limestone, 40.09258 N 19.96774 E, 650 m, 21 May 2011, Z. Barina, H. Mező & D. Pifkó 19216 (BP!); idem, 40.0935 N 19.96225 E, 1500 m, 21 May 2011, Z. Barina, H. Mező & D. Pifkó 19217 (BP!); Nemercka, near the summit (Maja e Papingut), calcareous scree slopes, 2180 m, 40°08’05’’N 20°24’33’’E, 12 July 2012, Conti & Manilla s.n. (APP Nos. 48886!, 55528!); Tra Poliçan e la vetta del Mt. Nëmerçkë, pendii rupestri e pascoli, 2300 m, 26 June 2015, F. Conti, D. Lakušić, R. Di Pietro, N. Kuzmanović, A. Stinca, S. Durović, I. Janković, R. Pennesi (APP No. 56996!); Mt. Nëmerçkë, circo glaciale principale, pendii rupestri, 28 June 2015, F. Conti, R. Di Pietro, A. Stinca, R. Pennesi (APP Nos. 57114!, 57115!, 57118!); Nemërçkë, Dousko, 40.064832 N, 20.479923 E, alt. 1960 m, alpine grasslands, Daphno-Festucetea limestone, 24 June 2015, D.Lakušić, N. Kuzmanović, S. Đurović, I. Janković (BEOU No. 42346). GREECE. Ioannina Nemërçkë, Dousko, 40.06297N, 20.48703E, alpine grasslands, Daphno-Festucetea limestone, 24 June 2015, D.Lakušić, N. Kuzmanović, R. Di Pietro, S. Đurović, I. Janković (APP No. 56301!).
description: Published as part of Conti, Fabio, 2018, A new combination in Leontodon (Asteraceae, Cichorieae), pp. 287-291 in Phytotaxa 360 (3) on pages 288-289, DOI: 10.11646/phytotaxa.360.3.9, http://zenodo.org/record/13704170
Exploring Flavor-Dependent Long-Range Forces in Long-Baseline Neutrino Oscillation Experiments
Creators: name: Chatterjee, Sabya Sachi
name: Dasgupta, Arnab
name: Agarwalla, Sanjib Kumar
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: The Standard Model gauge group can be extended with minimal matter content by introducing anomaly free U(1) symmetry, such as $L_e-L_μ$ or $L_e-L_τ$. If the neutral gauge boson corresponding to this abelian symmetry is ultra-light, then it will give rise to flavor-dependent long-range leptonic force, which can have significant impact on neutrino oscillations. For an instance, the electrons inside the Sun can generate a flavor-dependent long-range potential at the Earth surface, which can suppress the $ν_μ \to ν_e$ appearance probability in terrestrial experiments. The sign of this potential is opposite for anti-neutrinos, and affects the oscillations of (anti-)neutrinos in different fashion. This feature invokes fake CP-asymmetry like the SM matter effect and can severely affect the leptonic CP-violation searches in long-baseline experiments. In this paper, we study in detail the possible impacts of these long-range flavor-diagonal neutral current interactions due to $L_e-L_μ$ symmetry, when (anti-)neutrinos travel from Fermilab to Homestake (1300 km) and CERN to Pyhäsalmi (2290 km) in the context of future high-precision superbeam facilities, DUNE and LBNO respectively. If there is no signal of long-range force, DUNE (LBNO) can place stringent constraint on the effective gauge coupling $α_{eμ} < 1.9 \times 10^{-53}~(7.8 \times 10^{-54})$ at 90% C.L., which is almost 30 (70) times better than the existing bound from the Super-Kamiokande experiment. We also observe that if $α_{eμ} \geq 2 \times 10^{-52}$, the CP-violation discovery reach of these future facilities vanishes completely. The mass hierarchy measurement remains robust in DUNE (LBNO) if $α_{eμ} < 5 \times 10^{-52}~(10^{-52})$.
description: 44 pages, 54 pdf figures, 7 tables. Published in JHEP
MS Gr. class. c. 4 919
Creators: name: Oxyrhynchus Papyri
Publisher: name: University of Oxford
Year: 2023
Subjects: classificationCode: 470316
subject: Latin and classical Greek languages

description: P.Herc. 1065 col. 2. Philodemus, De signis
Drawing by Gennaro Casanova
MPEC 2024-R100 : 2024 RF3
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2024
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: 2024 RF3

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
The Use of Twitter in Everyday Life Information Seeking
Creators: name: Weber, Jessica Lee
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2010
Subjects: Information behavior
Online social networks
Computer-mediated communication
Twitter

description: This study is concerned with information seeking behaviors and strategies on Twitter, a microblogging social network of some 75 million registered users. Data was collected using an electronic survey distributed to SILS listservs in February 2010. Responses from 126 active Twitter users were analyzed. Findings indicate that Twitter is not used as a search engine so much as a 'serendipity engine'. Rather than actively seeking information, most users report they are passive participants in the network, picking and choosing tweets of interest among the constant flow of data. Users enjoy the immediacy of real-time information which is contextualized by a community of diverse individuals. System recommendations are suggested, particularly as they pertain to advanced search features and filtering to reduce noise and locate accurate results in cases where specific information is sought. The exploratory nature of this work lays a foundation for future study while providing insights to scholars and system designers.
CSI 2264: Accretion process in classical T Tauri stars in the young cluster NGC 2264
Creators: name: Sousa, Alana
name: Alencar, Silvia
name: Bouvier, Jérôme
name: Stauffer, John
name: Venuti, Laura
name: Hillenbrand, Lynne
name: Cody, Ann Marie
name: Teixeira, Paula
name: Guimarães, Marcelo
name: McGinnis, Pauline
name: Rebull, Luisa
name: Flaccomio, Ettore
name: Fürész, Gabor
name: Micela, Giuseppina
name: Gameiro, Jorge
Publisher: name: arXiv
Year: 2015
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Our goal is to relate the photometric and spectroscopic variability of classical T Tauri stars, of the star-forming cluster NGC 2264, to the physical processes acting in the stellar and circumstellar environment, within a few stellar radii from the star. NGC 2264 was the target of a multiwavelength observational campaign with CoRoT, MOST, Spitzer, and Chandra satellites and observations from the ground. We classified the CoRoT light curves of accreting systems according to their morphology and compared our classification to several accretion diagnostics and disk parameters. The morphology of the CoRoT light curve reflects the evolution of the accretion process and of the inner disk region. Accretion burst stars present high mass-accretion rates and optically thick inner disks. AA Tau-like systems, whose light curves are dominated by circumstellar dust obscuration, show intermediate mass-accretion rates and are located in the transition of thick to anemic disks. Classical T Tauri stars with spot-like light curves correspond mostly to systems with a low mass-accretion rate and low mid-IR excess. About 30% of the classical T Tauri stars observed in the 2008 and 2011 CoRoT runs changed their light-curve morphology. Transitions from AA Tau-like and spot-like to aperiodic light curves and vice versa were common. The analysis of the $Hα$ emission line variability of 58 accreting stars showed that 8 presented a periodicity that in a few cases was coincident with the photometric period. The blue and red wings of the $Hα$ line profiles often do not correlate with each other, indicating that they are strongly influenced by different physical processes. Accreting stars have a dynamic stellar and circumstellar environment that can be explained by magnetospheric accretion and outflow models, including variations from stable to unstable accretion regimes on timescales of a few years
Η Β΄ Οικουμενική Σύνοδος και το κανονικό της έργο
Creators: name: Σαρβάνης, Γρηγόριος Δημόκριτου
Publisher: name: Aristotle University of Thessaloniki
Year: 2023
Subjects: Θεολογία
Κανονικό Δίκαιο
Οικουμενικές Σύνοδοι
Theology
Canon Law
Ecumenical Council

description: Σκοπός της συγκεκριμένης μελέτης είναι η παρουσίαση της κανονικής διδασκαλίας της Β΄ Οικουμενικής Συνόδου, αλλά και η αναλυτική ερμηνευτική προσέγγισή των κανόνων της. Πιο συγκεκριμένα, αρχικά αναπτύσσεται το ιστορικό συγκείμενο μέσα στο οποίο συγκλήθηκε η Β΄ Οικουμενική Σύνοδος στην Κωνσταντινούπολή κατά τα έτη 381-382. Στη συνέχεια, αναλύεται σύντομα το δογματικό μέρος των εργασιών. Έπειτα, η μελέτη επικεντρώνεται στο νομοθετικό-κανονικό έργο της Συνόδου, εξετάζοντας τους επτά κανόνες που θεσπίστηκαν κατά τη διάρκεια των εργασιών της και ομαδοποιώντας τους σε τρεις επιμέρους κατηγορίες. Η μελέτη ολοκληρώνεται με τη διατύπωση συμπερασμάτων και την ανάδειξη της συνεισφοράς της Συνόδου στην κανονική παράδοση της Ορθόδοξης Εκκλησίας. Στο τέλος, παρατίθεται η ελληνόγλωσση και ξενόγλωσση επιστημονική βιβλιογραφία.
description: The purpose of this study is the presentation of the Second Ecuminical Council’s canons and their interpretation. First of all, it is developed the historical frame of the Second Ecuminical Council in Constantinople during 381-382. After that, it is shortly analyzed the doctrinal part of the Council. Then the study is focusing on the canons of the Council and it is grouping them in three categories. In conclusion, it is emerged the contribution of the Second Ecumenical Council in the canonical tradition of Orthodox Church and it is listed the greek and international literature.
Stenostelma Schlechter 1894
Creators: name: Bester, Stoffel P.
name: Nicholas, Ashley
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Gentianales
Apocynaceae
Stenostelma

description: Stenostelma Schlechter (1894b: 6).
 Type: Stenostelma capense Schlechter (1894b: 6).
 Krebsia Harvey (1868: 233) (nom. illeg.), non Ecklon & Zeyher (1836: 179).
 Type: Krebsia stenoglossa (Schlechter 1895a: 270), Schlechter (1895b: 40).
description: Published as part of Bester, Stoffel P. & Nicholas, Ashley, 2018, New combinations in Stenostelma (Apocynaceae-Asclepiadoideae) and two novel species from South Africa, pp. 41-55 in Phytotaxa 361 (1) on page 42, DOI: 10.11646/phytotaxa.361.1.3, http://zenodo.org/record/13704192
Authentication and access issues for electronic library resources at the University of North Carolina-Chapel Hill
Creators: name: Cahall, Molynda
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2002
Subjects: Distance education
Authentication
Internet--Security measures
College and University Libraries Computers--Access Control

description: A variety of data collection methods were used to identify access and authentication issues faced by remote users of licensed electronic resources at the University of North Carolina-Chapel Hill. Five main components must be addressed by users for successful access from off-campus including: 1) a valid identification number with corresponding library borrower's record, 2) a working Internet connection, 3) a compatible Internet browser properly configured to the proxy server, 4) correctly configured firewall and/or filter software, and 5) properly working electronic resources. Recommendations are made related to support for distance learners in regard to library borrower's database issues, proxy server setup, and usability of online off-campus access instructions. These findings will be helpful to academic libraries that are providing off-campus access for all remote users as well as distance learning students.
Active-sterile neutrino oscillations in the early Universe with full collision terms
Creators: name: Hannestad, Steen
name: Hansen, Rasmus Sloth
name: Tram, Thomas
name: Wong, Yvonne Y. Y.
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Sterile neutrinos are thermalised in the early Universe via oscillations with the active neutrinos for certain mixing parameters. The most detailed calculation of this thermalisation process involves the solution of the momentum-dependent quantum kinetic equations, which track the evolution of the neutrino phase space distributions. Until now the collision terms in the quantum kinetic equations have always been approximated using equilibrium distributions, but this approximation has never been checked numerically. In this work we revisit the sterile neutrino thermalisation calculation using the full collision term, and compare the results with various existing approximations in the literature. We find a better agreement than would naively be expected, but also identify some issues with these approximations that have not been appreciated previously. These include an unphysical production of neutrinos via scattering and the importance of redistributing momentum through scattering, as well as details of Pauli blocking. Finally, we devise a new approximation scheme, which improves upon some of the shortcomings of previous schemes.
description: 30 pages, 7 figures
Κράτος και Θρησκεία στην Πολιτική Φιλοσοφία του Σπινόζα
Creators: name: Κόνιαρη, Αργυρώ Χρήστου
Publisher: name: Aristotle University of Thessaloniki
Year: 2023
Subjects: Σπινόζα
Κράτος
Θρησκεία
Spinoza
State
Religion

description: Σκοπός της διατριβής ήταν η μελέτη της φιλοσοφίας του Σπινόζα και η παρουσίαση της σκέψης του σε ζητήματα θρησκείας και πολιτικής οργάνωσης. Εξετάσαμετην ταύτιση του Θεού με την έννοια της μοναδικής υπόστασης πουαποτελείκεντρικό ζήτημα στο σύστημα του Σπινόζα. Παράλληλα αναφερθήκαμεστα κατηγορήματα που αποδίδονται σ’ αυτή, τα οποία είναι άπειρα, έχουμε ωστόσο τη δυνατότητα να γνωρίσουμε δύο από αυτά, τη σκέψη και την έκταση. Στη συνέχεια μας απασχόλησε η διάκριση της προφητικής από τη φιλοσοφική γνώση, που είναι η μόνη που έχει αποδεικτική αξία κι οδηγεί στην αλήθεια, αλλά και η έμφαση που δίνει ο φιλόσοφος στη γνώση, την οποία κατατάσσει σε τρία επίπεδα. Ένα άλλο θέμα που θίξαμε ήταν η οργάνωση των θεσμών. Αφού αναλύσαμε την έννοια του φυσικού δικαίου που εισάγει ο Σπινόζα παρουσιάσαμε τις συνθήκες διαμόρφωσης των πολιτικών θεσμών, ώστε να καθίσταται δυνατή η παραχώρηση ελευθερίας χωρίς να τίθεται σε κίνδυνο η πολιτειακή οργάνωση.
description: The aim of the present thesis was the study of Spinoza's philosophy and the presentation of his thinking on matters of religion and political organization. We have examined the identification of God with the concept of unique being which is a central issue in Spinoza's system. At the same time we referred to the predicates attributed to it, which are infinite, but we have the possibility to know two of them, thought and extent. Then we were concerned with the distinction between prophetic knowledge and philosophical knowledge, which is the only one that has evidential value and leads to the truth, and also the emphasis that the philosopher places on knowledge, which he classifies on three levels. Another issue we touched upon was the organization of the institutions. After analyzing the concept of natural law introduced by Spinoza, we presented the conditions for the formation of political institutions, so that it becomes possible to grant freedom without jeopardizing the state organization.
Service Oriented Library: the Conception of the Ford Business Library
Creators: name: Puderbaugh, Allison L.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2004
Subjects: Duke University. Fuqua School of Business Ford Library
Business Libraries Case Studies

description: This paper will examine the academic business library, its conception and future through interviews and documentation available at the Ford Business Library of Duke University. This paper describes the evolution of the academic business library in relation to the evolution of business. Interviewees include faculty present at the time of the library's conception as well as faculty currently serving at the Fuqua Business School. This paper also considers the purpose of the Ford Business Library and if there are any reasons to change or expand the current collection.
Stenostelma capense Schlechter 1894
Creators: name: Bester, Stoffel P.
name: Nicholas, Ashley
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Gentianales
Apocynaceae
Stenostelma
Stenostelma capense

description: Stenostelma capense Schlechter (1894b: 6).
 Schizoglossum capense (Schltr.) Huber (1961: 35).
 Type: — SOUTH AFRICA, Northern Cape Province, near Kimberley, alt. 1300 m, December 1892, H.G. Flanagan 1693 (lectotype PRE! [PRE0345553 -0], here designated; isolectotypes BOL [BOL137919] scan!, GRA [GRA0002410 -0] scan!, K! [K000234348]).
 Schizoglossum aciculare N.E. Brown (1902: 363), syn. nov.
 Type: — BOTSWANA, Ngamiland, near Kgwebe, December 1896, E.J. Lugard 82 (holotype K! [K000234349]).
 In the original description of Stenostelma capense Schlechter (1894b) cited only the collection of Flanagan 1693. From the four duplicates seen the PRE specimen was selected as lectotype as it is the best quality material with numerous inflorescences and the habit typical of the species. The K material is only a branch taken from this specimen as indicated on the note in Brown’s hand on the K specimen. The GRA and BOL specimens are much smaller though also good material.
 The type of Schizoglossum aciculare was indicated as Lugard 82 by Brown (1902). The only duplicate of Lugard 82 found is at K, it is indicated as “ Type ” and therefore must be regarded as the holotype.
description: Published as part of Bester, Stoffel P. & Nicholas, Ashley, 2018, New combinations in Stenostelma (Apocynaceae-Asclepiadoideae) and two novel species from South Africa, pp. 41-55 in Phytotaxa 361 (1) on pages 42-43, DOI: 10.11646/phytotaxa.361.1.3, http://zenodo.org/record/13704192
Nanosized helical magnetic domains in strongly frustrated Fe3PO4O3
Creators: name: Ross, Kate A.
name: Bordelon, Mitchell
name: Terho, Greg
name: Neilson, James R.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Fe3PO4O3 forms a non-centrosymmetric lattice structure (space group R3m) comprising triangular motifs of Fe^{3+} coupled by strong antiferromagnetic interactions (|Θ_{CW}| > 900 K). Neutron diffraction from polycrystalline samples shows that strong frustration eventually gives way to an ordered helical incommensurate structure below T_N = 163 K, with the helical axis in the hexagonal ab plane and a modulation length of ~ 86 Å. The magnetic structure consists of an unusual needle-like correlation volume that extends past 900 Åalong the hexagonal c-axis but is limited to ~ 70 Åin the ab plane, despite the three-dimensional nature of the magnetic sublattice topology. The small in-plane correlation length, which persists to at least T = T_N/40, indicates a robust blocking of long-range order of the helical magnetic structure, and therefore stable domain walls, or other defect spin textures, must be abundant in Fe3PO7. Temperature dependent neutron powder diffraction reveals small negative thermal expansion below T_N. No change in lattice symmetry is observed on cooling through T_N, as revealed by high resolution synchrotron X-ray diffraction. The previously reported reduced moment of the Fe^{3+} ions (S=5/2), μ~ 4.2 μ_B, is confirmed here through magnetization studies of a magnetically diluted solid solution series of compounds, Fe3-xGaxPO4O3, and is consistent with the refined magnetic moment from neutron diffraction 4.14(2) μ_B. We attribute the reduced moment to a modified spin density distribution arising from ligand charge transfer in this insulating oxide.
description: 16 pages, 16 figures. Minor changes to text
Supporting Legal Scholarship: Exploring Law Library Services for Student-Edited Law Journals
Creators: name: Hyland, Melissa
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2017
Subjects: Information services--User education
Law librarians
Law libraries

description: Legal scholarship is unique amongst nearly all disciplines because it is edited and published through student-run law reviews and journals rather than through the traditional peer-review and editing processes. The student-edited law review system has been in place for over a century and serves two purposes: (1) to act as a vehicle for legal scholarship and (2) to serve as a learning opportunity for American law students. Law reviews are cited by practicing attorneys, judges, and legislators, and these publications have helped to shape the current state of American law. However, law students who serve as staff members on these journals often receive little training and support from legal institutions and faculty. This research paper explores the types of services that academic law libraries are providing for staff members of student-edited law reviews and journals and seeks to identify emerging best practices and areas for further expansion of services.
Addressing the Challenges of Using Ferromagnetic Electrodes in the Molecular Spintronics Devices
Creators: name: Tyagi, Pawan
name: Friebe, Edward
name: Baker, Collin
Publisher: name: arXiv
Year: 2015
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Ferromagnetic electrodes chemically bonded with thiol functionalized molecules can produce novel molecular spintronics devices. However, major challenges lie in developing Ferromagnetic electrodes based commercially viable device fabrication scheme that consider the susceptibility of ferromagnetic electrodes to oxidation, chemical etching, and stress induced deformations during fabrication and usage. This paper studies NiFe, an alloy used in the present day memory devices and high-temperature engineering applications, as a candidate FM electrode for the fabrication of MSDs. Our spectroscopic reflectance studies show that NiFe start oxidizing aggressively beyond 90 C. The NiFe surfaces, aged for several months or heated for several minutes below 90 C, exhibited remarkable electrochemical activity and were suitable for chemical bonding with the thiol functionalized molecular device elements. NiFe also demonstrated excellent etching resistance and minimized the mechanical stress induced deformities. This paper demonstrates the successful utilization of NiFe electrodes in the tunnel junction based molecular device fabrication approach. This paper is expected to fill the knowledge gap impeding the experimental development of ferromagnetic electrode based molecular spintronics devices for realizing novel logic and memory devices and observing a numerous theoretically predicted phenomenon.
A Critique of the Student as Customer Metaphor in Higher Education and Academic Libraries
Creators: name: McGuigan, Niamh A.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2005
Subjects: Public relations of libraries--College and university libraries
College and university libraries--Evaluation
Library Science literature--Evaluation
Terminology Evaluation
Total quality management

description: This paper describes a critique of the trend in higher education and academic libraries to refer to students and library patrons as customers. A survey of education and library literature was conducted to trace the development of this metaphor, particularly in relation to the use of Total Quality Management in higher education. Issues examined in this paper include the role of metaphors, the applicability of business terminology and concepts to education and libraries, the effects of commodification of information and education, and the influence the student/patron as customer metaphor has on information literacy instruction. This paper concludes that usage of the student/patron as customer metaphor indicates an inability to comprehend the role of the student or library patron, and that, by continuing to refer to college students and library patrons as customers, we contribute to the sense that education, research, and access to library services are irrelevant in today's world.
Automatic Detection of Magnetic delta in Sunspot Groups
Creators: name: Padinhatteeri, Sreejith
name: Higgins, Paul A.
name: Bloomfield, D. Shaun
name: Gallagher, Peter T.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Large and magnetically complex sunspot groups are known to be associated with flares. To date, the Mount Wilson scheme has been used to classify sunspot groups based on their morphological and magnetic properties. The most flare prolific class, the delta sunspot-group, is characterised by opposite polarity umbrae within a common penumbra, separated by less than 2 degrees. In this article, we present a new system, called the Solar Monitor Active Region Tracker - Delta Finder (SMART-DF), that can be used to automatically detect and classify magnetic deltas in near-realtime. Using continuum images and magnetograms from the Helioseismic and Magnetic Imager (HMI) onboard NASA's Solar Dynamics Observatory (SDO), we first estimate distances between opposite polarity umbrae. Opposite polarity pairs having distances of less that 2 degrees are then identified, and if these pairs are found to share a common penumbra, they are identified as a magnetic delta configuration. The algorithm was compared to manual delta detections reported by the Space Weather Prediction Center (SWPC), operated by the National Oceanic and Atmospheric Administration (NOAA). SMART-DF detected 21 out of 23 active regions (ARs) that were marked as delta spots by NOAA during 2011 - 2012 (within +/- 60 degrees longitude). SMART-DF in addition detected five ARs which were not announced as delta spots by NOAA. The near-relatime operation of SMART-DF resulted in many deltas being identified in advance of NOAA's daily notification. SMART-DF will be integrated with SolarMonitor (www.solarmonitor.org) and the near-realtime information will be available to the public.
description: 14 pages, 5 figures, accepted for publication in Solarphysics
MS Gr. class. c. 4 920
Creators: name: Oxyrhynchus Papyri
Publisher: name: University of Oxford
Year: 2023
Subjects: classificationCode: 470316
subject: Latin and classical Greek languages

description: P.Herc. 1065 col. 3. Philodemus, De signis
Drawing by Gennaro Casanova
Design decisions for a low literacy health survey user interface
Creators: name: Lewis, Clarence
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2000
Subjects: Human-computer interaction
Touch screens
Interactive computer systems
Literacy
Surveys--Computer software
Graphical user interfaces (Computer systems)

description: The American health care system relies heavily on information supplied by patients to administer efficient and effective patient care.  Unfortunately, most standard patient intake forms are incomprehensible for the 94 million American adults who are functionally illiterate.  This inability to communicate health factors can adversely affect the ability to receive proper care.  Studies have shown that the use of computers as an alternative strategy for retrieving information from patients can be advantageous for both patients and health care providers.  This paper details the background, methodology, results, and design decisions of a series of usability test conducted on an interface designed to collect health information from a low literacy population.