cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Gas inflow and metallicity drops in star-forming galaxies
Creators: name: Ceverino, Daniel
name: Sanchez-Almeida, Jorge
name: Muñoz-Tuñon, Casiana
name: Dekel, Avishai
name: Elmegreen, Bruce G.
name: Elmegreen, Debra M.
name: Primack, Joel
Publisher: name: arXiv
Year: 2015
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Gas inflow feeds galaxies with low metallicity gas from the cosmic web, sustaining star formation across the Hubble time. We make a connection between these inflows and metallicity inhomogeneities in star-forming galaxies, by using synthetic narrow-band images of the Halpha emission line from zoom-in AMR cosmological simulations of galaxies with stellar masses of $M \simeq 10^9 $Msun at redshifts z=2-7. In $\sim$50\% of the cases at redshifts lower than 4, the gas inflow gives rise to star-forming, Halpha-bright, off-centre clumps. Most of these clumps have gas metallicities, weighted by Halpha luminosity, lower than the metallicity in the surrounding interstellar medium by $\sim$0.3 dex, consistent with observations of chemical inhomogeneities at high and low redshifts. Due to metal mixing by shear and turbulence, these metallicity drops are dissolved in a few disc dynamical times. Therefore, they can be considered as evidence for rapid gas accretion coming from cosmological inflow of pristine gas.
description: 8 pages, 7 figures. New figure 6 and minor changes. Conclusions unchanged. Accepted version
MS Gr. class. c. 5 1030
Creators: name: Oxyrhynchus Papyri
Publisher: name: University of Oxford
Year: 2023
Subjects: classificationCode: 470316
subject: Latin and classical Greek languages

description: P.Herc. 336/1150 col. 14. Polystratus, De contemptu
Drawing by Carlo Orazi
The RDA Revolution: Professional Reactions to RDA
Creators: name: Kyrios, Alexander C.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2011
Subjects: Anglo-American cataloguing rules
College and university libraries
Catalogers
MARC system
Cataloging--Rules

description: Since 2005, when the in-development AACR3 was rechristened Resource Description and Access (RDA), the academic cataloging community has become sharply divided based on the perceived merits and shortcomings of the emerging standard. Some opponents have argued that tweaks could have kept AACR2 relevant in the digital age, while others dismiss RDA as too similar to AACR2 and too firmly grounded in a card catalog model. RDA's supporters contend that it will be an important step forward, helping lead to a post-MARC cataloging environment. This paper examines this range of opinions expressed by professional academic catalogers and seeks to identify some of the reasons this debate has often flared tempers and led to personal resentments. The paper will review published literature on the topic, feature interviews with five professional catalogers, and analyze a survey conducted by another cataloger. Analysis reveals more common ground among these differing parties than may have been expected.
title: A “stone-like” leiomyoma causing uterine and bowel perforation
Creators: name: Freitas, Patrícia
Publisher: name: EURORAD
Year: 2023
Subjects: subject: Genital (female) imaging
subject: Oncology
subject: Pelvis
subject: CT
subject: MR
subject: MR-Functional imaging
subject: Ultrasound
subject: Clinical Cases

description: Clinical History: A 75-year-old female with a clinical background of hypertension, diabetes mellitus type II, and uterine leiomyoma, presented at our hospital's emergency department with abdominal pain, asthenia, and anorexia. Physical examination revealed a large palpable abdominal mass. Analytically, the patient presented with anaemia and increased inflammatory parameters (Hb 7.4 g/dL; Leucocytosis 14.230 x 109/L).

description: 75 years, female
The $β$-expansion of the $D=1$ fermionic spinless Hubbard model off the half-filling regime
Creators: name: Silva, E. V. Corrêa
name: Thomaz, M. T.
name: Rojas, O.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We found that when the spinless model is off the half-filling regime ($μ\neq V$), the Helmholtz free energy (HFE) can be written as two $β$-expansions: one expansion comes from the half-filling configuration and another one that depends on the parameter $x = μ- V$. We show numerically that the chemical potential as a function of temperature satisfies a relation similar to the one derived from the particle-hole symmetry of the fermionic spinless model. We extend the $β$-expansion of the HFE of the one-dimensional fermionic spinless Hubbard model up to order $β^8$.
description: 12 pages, 3 figures
An Evidence-Based Study of Social Media Use by Small Businesses
Creators: name: Vepraskas, Laura
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2015
Subjects: Digital media
Computers--Business Use

description: Over the past decade, social media networking has become increasingly
valuable to individuals and other entities, such as small businesses for
promotional means. Developed as a tool to help individuals interact,
communicate, and exchange information, social media use can yield positive
outcomes for small businesses as evident through financial gain and increased
customer communication.
Using Evidence-Based Practice (EBP) principles, this study evaluates the
current body of literature regarding small business use of social media. Thirty
articles were evaluated using a criteria checklist to develop recommended
principles of how small businesses may best use social media in their future
marking strategies.
Sarah Hennies | Thought Sectors
Creators: name: Lloyd-Jones, Rebecca
Publisher: name: Griffith University
Year: 2023
Subjects: subject: 190407 Music Performance
subject: FOS: Arts (arts, history of arts, performing arts, music)

description: On Wednesday, October 26th, 2022, Rebecca Lloyd-Jones presented the Australian Premiere of Sarah Hennies percussion solo, Thought Sectors. One hour in length, Thought Sectors explores concepts of divided consciousness - the active and receptive brain, with the composition being based on these conditions and their manifestation through sound exploration. Staged at the Woolloongabba Substation, the virtuosic percussion solo consists not only of conventional instruments, such as the vibraphone and bass drum, yet also incorporates items such as a flower sifter, stapler mixing bowl, and large pitcher of water. Program note: “Thought Sectors” was somehow based on “divided consciousness," a term coined by psychologist Ernest Hilgard that theorized the human brain is divided into distinct components rather than a single unified consciousness. He assigns two modes of consciousness to the brain - active and receptive - and the piece is based on these conditions, both separately and then simultaneously. I began this piece before the COVID-19 pandemic began in spring 2020 when I took a long break from composing. The amount of time that has passed since I first conceived of the piece coupled with a harrowing few years of early parenthood, a long distance job, and serious mental health issues mean that this piece is a particularly honed example of a mysterious, semi-rational approach to composition I have been exploring since 2018. What is this piece? How did I make artistic decisions? I truly don’t remember and perhaps this is analogous to the vast portions of our brains to which we have no direct access. - Sarah Hennies Sarah Hennies | Thought Sectors (Aust premiere), performed by Rebecca Lloyd-Jones
MS Gr. class. c. 5 1031
Creators: name: Oxyrhynchus Papyri
Publisher: name: University of Oxford
Year: 2023
Subjects: classificationCode: 470316
subject: Latin and classical Greek languages

description: P.Herc. 336/1150 col. 15. Polystratus, De contemptu
Drawing by Carlo Orazi
Interplay of Electron and Nuclear Spin Noise in GaAs
Creators: name: Berski, Fabian
name: Hübner, Jens
name: Oestreich, Michael
name: Ludwig, Arne
name: Wieck, A. D.
name: Glazov, Mikhail
Publisher: name: arXiv
Year: 2015
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We present spin noise (SN) measurements on an ensemble of donor-bound electrons in ultrapure GaAs:Si covering temporal dynamics over six orders of magnitude from milliseconds to nanoseconds. The SN spectra detected at the donor-bound exciton transition show the multifaceted dynamical regime of the ubiquitous mutual electron and nuclear spin interaction typical for III-V based semiconductor systems. The experiment distinctly reveals the finite Overhauser-shift of an electron spin precession at zero external magnetic field and a second contribution around zero frequency stemming from the electron spin components parallel to the nuclear spin fluctuations. Moreover, at very low frequencies features related with time-dependent nuclear spin fluctuations are clearly resolved making it possible to study the intricate nuclear spin dynamics at zero and low magnetic fields. The findings are in agreement with the developed model of electron and nuclear SN.
Maidens or Warriors: Women's Roles in Current Young Adult Fantasy Literature
Creators: name: Wolford, Tara E.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2011
Subjects: Young adults' literature
Content analysis
Young adults' literature--Evaluation--Sexism

description: In American society, media, and literature, gender bias and stereotyping are often the subject for analysis.  Fantasy, a genre that has recently enjoyed much popularity, has a history of assigning female characters with roles stereotypical to gender.  What remains to be seen is whether women's roles in current young adult fantasy have adapted with the changing times: are roles still gender-biased, or have they become neutral?  In this quantitative content analysis, current young adult fantasy novels are to be randomly selected and the female characters will be examined for their roles, both positive or negative.  Each book will be analyzed for the stereotypical gender traits found in the Gender Personality Traits as Used in Basal Reading Group Series (Evans & Davies, 2000) inventory.  The data will be analyzed for themes within the books separately, and then as a whole.
The Function of Gods in Modern Children's Literature: A Content Analysis of the Gods' Roles in Rick Riordan's Percy Jackson and the Olympians Series
Creators: name: Checkai, Alyssa M.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2009
Subjects: Mythology, Greek, in literature
Children's literature--Evaluation
Folk literature--Evaluation
Fantasy--Evaluation

description: This study examines the function of ancient gods in modern children's literature. Latent content analysis was used to determine the roles gods play in Riordan's Percy Jackson and the Olympians series. Five roles were identified: helper, opponent, manipulator, enabler, and beneficiary. The gods were found to embody intangible concepts, raise the level of the action and increase the mortals' own powers, and ultimately prove the power and importance of humanity.
Averaging and rates of averaging for uniform families of deterministic fast-slow skew product systems
Creators: name: Korepanov, A.
name: Kosloff, Z.
name: Melbourne, I.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics

description: We consider families of fast-slow skew product maps of the form \begin{align*} x_{n+1} = x_n+εa(x_n,y_n,ε), \quad y_{n+1} = T_εy_n, \end{align*} where $T_ε$ is a family of nonuniformly expanding maps, and prove averaging and rates of averaging for the slow variables $x$ as $ε\to0$. Similar results are obtained also for continuous time systems \begin{align*} \dot x = εa(x,y,ε), \quad \dot y = g_ε(y). \end{align*} Our results include cases where the family of fast dynamical systems consists of intermittent maps, unimodal maps (along the Collet-Eckmann parameters) and Viana maps.
description: Shortened version. First order averaging moved into a remark. Explicit coupling argument moved into a separate note
MS Gr. class. c. 5 1032
Creators: name: Oxyrhynchus Papyri
Publisher: name: University of Oxford
Year: 2023
Subjects: classificationCode: 470316
subject: Latin and classical Greek languages

description: P.Herc. 336/1150 col. 16. Polystratus, De contemptu
Drawing by Carlo Orazi
Thermal emission by a subwavelength aperture
Creators: name: Joulain, Karl
name: Ezzahri, Younès
name: Carminati, Rémi
Publisher: name: arXiv
Year: 2015
Subjects: subject: Classical Physics (physics.class-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We calculate, by means of fluctuational electrodynamics, the thermal emission of an aperture filled by vacuum or a material at temperature T. We show that thermal emission is very different whether the aperture size is large or small compared to the thermal wavelength. Subwavelength apertures filled with vacuum (subwavelength blackbody) have their thermal emission strongly decreased compared to classical blackbodies. A simple expression of their emissivity can be calculated and their total emittance scales as T 8 instead of T 4 for large apertures. Thermal emission of disk of materials with a size comparable to the wavelength is also discussed. It is shown in particular that emissivity of such a disk is increased when the material can support surface waves such as phonon polaritons.
Thermodynamics and kinetics of solids fragmentation at severe plastic deformation
Creators: name: Khomenko, A. V.
name: Troshchenko, D. S.
name: Metlov, L. S.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The approach of nonequilibrium evolution thermodynamics earlier offered is developed. It helps to describe the processes of defect formation within the adiabatic approximation. The basic equations system depends on the initial defects distribution (dislocations and grain boundaries). The phase diagram is determined with the domains of the realization of different limiting structure types. The interaction effect of several defect types on the formation of a limiting structure is investigated in terms of the internal energy. The conditions of the formation of two limiting structures are found. The kinetics of the steady-state values establishment of the defects density is investigated within the scope of the adiabatic approximation. The dislocations density change follows the evolution of the grain boundaries density in this approach. It is shown that grain sizes, in limiting structures, decrease with an increase of the elastic strains.
description: 14 pages, 6 figures
Predicting Future E-Book Use: Correlating Selection Guide Scores with Usage Data in a Health Sciences Library
Creators: name: McElfresh, Karen
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2013
Subjects: Electronic books
Medical libraries--Collection development
Selection tools (Libraries)

description: Selection guides are essential tools in libraries because they help librarians determine which books to purchase for their collections. A popular selection aide in the Health Sciences is Doody's Core Titles (DCT), which provides quantifiable scores for each book. The objective of this study was to determine to what extent these scores correlate with usage by library patrons. A list of all e-books on the DCT list at the University of North Carolina at Chapel Hill Health Sciences Library was compiled and circulation data was obtained. Statistical calculations, including correlation coefficients, were performed in order to determine if a statistically significant relationship between DCT scores and usage exists. The data were also examined for other trends in e-book usage. While this study was not able to conclusively prove a relationship between DCT score and usage, in general, books with higher DCT scores are used more frequently.
Geometric Constructions of Two Dimensional (0,2) SUSY Theories
Creators: name: Tatar, Radu
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider the field theories on multiple stacks of D5 branes wrapped on four cycles of resolved/deformed conifold geometries fibered over a two torus. The central charges of the D5 branes are slightly misaligned when the branes are wrapped on various rigid holomorphic two cycles or when they have different charges with respect to a magnetic flux turned on the two torus. The wrapped D5 branes preserve (0,2) supersymmetry in two dimensions if the Kahler moduli and the magnetic flux are related. Our geometries are T-dual to the brane configurations considered by Kutasov-Lin and we provide a geometric interpretation for their equality between the field theory D-terms and the magnetic fluxes. We also consider the geometric transitions for rigid holomorphic two cycles fibered over a two torus with magnetic flux and discuss the partial breaking of supersymmetry after the geometric transitions.
description: 18 pages
Modelling the intermixing effects in highly strained asymmetric InGaAs/GaAs quantum well
Creators: name: Souaf, M.
name: Baira, M.
name: Maaref, H.
name: Ilahi, B.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: In this work, we have theoretically investigated the intermixing effect in highly strained In$_{0.3}$Ga$_{0.7}$As/GaAs quantum well (QW) taking into consideration the composition profile change resulting from in-situ indium surface segregation. To study the impact of the segregation effects on the postgrowth intermixing, one dimensional steady state Schrodinger equation and Fick's second law of diffusion have been numerically solved by using the finite difference methods. The impact of the In/Ga interdiffusion on the QW emission energy is considered for different In segregation coefficients. Our results show that the intermixed QW emission energy is strongly dependent on the segregation effects. The interdiffusion enhanced energy shift is found to be considerably reduced for higher segregation coefficients. This work adds a considerable insight into the understanding and modelling of the effects of interdiffusion in semiconductor nanostructures.
description: 6 pages, 4 figures
MS Gr. class. c. 5 1033
Creators: name: Oxyrhynchus Papyri
Publisher: name: University of Oxford
Year: 2023
Subjects: classificationCode: 470316
subject: Latin and classical Greek languages

description: P.Herc. 336/1150 col. 17. Polystratus, De contemptu
Drawing by Carlo Orazi
On growth of homology torsion in amenable groups
Creators: name: Kar, Aditi
name: Kropholler, Peter
name: Nikolov, Nikolay
Publisher: name: arXiv
Year: 2015
Subjects: subject: Group Theory (math.GR)
subject: Algebraic Topology (math.AT)
subject: K-Theory and Homology (math.KT)
subject: FOS: Mathematics

description: Suppose an amenable group $G$ is acting freely on a simply connected simplicial complex $\tilde X$ with compact quotient $X$. Fix $n \geq 1$, assume $H_n(\tilde X, \mathbb{Z})=0$ and let $(H_i)$ be a Farber chain in $G$. We prove that the torsion of the integral homology in dimension $n$ of $\tilde{X}/H_i$ grows subexponentially in $[G:H_i]$. By way of contrast, if $X$ is not compact, there are solvable groups of derived length 3 for which torsion in homology can grow faster than any given function.
0281 From Unwanted Heritage towards Difficult Heritage
Creators: name: Tali, Margaret
Publisher: name: RIHA Journal
Year: 2023

description: This article discusses Arno Breker’s portrait busts (1986) of the German collectors Peter and Irene Ludwig and the debates that surrounded this work during its displays in Germany and Hungary. Focusing on the contingent ways in which difficult pasts are attached to artistic heritage, it articulates how cross-border travels complicate this attachment. The work of Hitler’s once-leading artist Breker serves as a case study for analyzing how meanings are on the one hand produced and on the other hand suppressed and willfully ignored in the context of exhibition settings. The analysis of these portrait busts’ curatorial contextualisation from the 1980s to the 2020s reveals a shift in curators‘ attitudes towards Breker’s works: from an 'unwanted heritage' that is intentionally neglected to a 'difficult heritage' and the articulation of its difficulties and dissonances. Analysing the biography of these works makes it possible to show the important roles that curatorial problematising has carried in the framing of these works, both in Germany and Hungary.
description: RIHA Journal, 2022: RIHA Journal
Scrutinizing Hall effect in Mn$_{1-x}$Fe$_{x}$Si: Fermi surface evolution and hidden quantum criticality
Creators: name: Glushkov, V. V.
name: Lobanova, I. I.
name: Ivanov, V. Yu.
name: Voronov, V. V.
name: Dyadkin, V. A.
name: Chubova, N. M.
name: Grigoriev, S. V.
name: Demishev, S. V.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Separating between ordinary (OHE) and anomalous (AHE) Hall effect in the paramagnetic phase of Mn$_{1-x}$Fe$_{x}$Si reveals OHE sign inversion associated with the hidden quantum critical (QC) point $x^*\sim0.11$. The semimetallic behavior at intermediate Fe content leads to verifiable predictions in the field of fermiology, magnetic interactions and QC in Mn$_{1-x}$Fe$_{x}$Si. The change of electron and hole concentrations is considered as a driving force for tuning the QC regime in Mn$_{1-x}$Fe$_{x}$Si via modifying of RKKY exchange interaction within the Heisenberg model of magnetism.
description: 5 pages, 4 figures, 1 supplement
Validity of time reversal for testing Granger causality
Creators: name: Winkler, Irene
name: Panknin, Danny
name: Bartz, Daniel
name: Müller, Klaus-Robert
name: Haufe, Stefan
Publisher: name: arXiv
Year: 2015
Subjects: subject: Statistics Theory (math.ST)
subject: Machine Learning (stat.ML)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences

description: Inferring causal interactions from observed data is a challenging problem, especially in the presence of measurement noise. To alleviate the problem of spurious causality, Haufe et al. (2013) proposed to contrast measures of information flow obtained on the original data against the same measures obtained on time-reversed data. They show that this procedure, time-reversed Granger causality (TRGC), robustly rejects causal interpretations on mixtures of independent signals. While promising results have been achieved in simulations, it was so far unknown whether time reversal leads to valid measures of information flow in the presence of true interaction. Here we prove that, for linear finite-order autoregressive processes with unidirectional information flow, the application of time reversal for testing Granger causality indeed leads to correct estimates of information flow and its directionality. Using simulations, we further show that TRGC is able to infer correct directionality with similar statistical power as the net Granger causality between two variables, while being much more robust to the presence of measurement noise.
MS Gr. class. c. 5 1034
Creators: name: Oxyrhynchus Papyri
Publisher: name: University of Oxford
Year: 2023
Subjects: classificationCode: 470316
subject: Latin and classical Greek languages

description: P.Herc. 336/1150 col. 18. Polystratus, De contemptu
Drawing by Carlo Orazi
Electronic structure, magnetic ordering and X-ray magnetic circular dichroism in La$_{1-x}$Pr$_x$Co$_2$P$_2$ phosphides
Creators: name: Bekenov, L. V.
name: Moklyak, S. V.
name: Antonov, V. N.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The electronic structure and magnetic ordering in La$_{1-x}$Pr$_x$Co$_2$P$_2$ ($x=$0, 0.25, and 1) phosphides have been studied theoretically using the fully relativistic spin-polarized Dirac linear muffin-tin orbital (LMTO) band-structure method. The X-ray absorption and X-ray magnetic circular dichroism spectra at the Co$L_{2,3}$ and Pr$M_{4,5}$ edges have been investigated theoretically within the framework of the LSDA+$U$ method. The core-hole effect in the final state as well as the effects of the electric quadrupole $E_2$ and magnetic dipole $M_1$ transitions have been investigated. Good agreement with experimental measurements has been found.
description: 11 pages, 8 figures
Transformative Encounters in the Works of Neil Gaiman
Creators: name: Lukach, Katherine M.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2007
Subjects: Campbell, Joseph,1904-1987
Graphic novels
Gaiman, Neil,1960-
Comic books, strips

description: This study attempts to address the lack of research in the area of comic books and graphic novels, popular materials, and psychological approaches to literature. Literature on the topic is generally lacking, and is characterized by the need to provide evidence in favor of the scholarly merit of popular materials and previously neglected methodologies. The author used the works of Joseph Campbell to inform a content analysis of a sample of the works of British author Neil Gaiman in order to determine how characters are transformed by encounters. The method was qualitative in nature, and drew from research in the fields of education, psychology, literature studies, and librarianship. The study found that the transformations in Gaiman's works supported the concept that there is a lack of distinction between humans and mythical beings, and Gaiman fits Campbell's criteria for a modern mythmaker.
MS Gr. class. c. 5 1035
Creators: name: Oxyrhynchus Papyri
Publisher: name: University of Oxford
Year: 2023
Subjects: classificationCode: 470316
subject: Latin and classical Greek languages

description: P.Herc. 336/1150 col. 1. Polystratus, De contemptu
Drawing by Carlo Orazi
Diffusion Adaptation over Multi-Agent Networks with Wireless Link Impairments
Creators: name: Abdolee, Reza
name: Champagne, Benoit
name: Sayed, Ali H.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Systems and Control (eess.SY)
subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: Information Theory (cs.IT)
subject: Probability (math.PR)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: We study the performance of diffusion least-mean-square algorithms for distributed parameter estimation in multi-agent networks when nodes exchange information over wireless communication links. Wireless channel impairments, such as fading and path-loss, adversely affect the exchanged data and cause instability and performance degradation if left unattended. To mitigate these effects, we incorporate equalization coefficients into the diffusion combination step and update the combination weights dynamically in the face of randomly changing neighborhoods due to fading conditions. When channel state information (CSI) is unavailable, we determine the equalization factors from pilot-aided channel coefficient estimates. The analysis reveals that by properly monitoring the CSI over the network and choosing sufficiently small adaptation step-sizes, the diffusion strategies are able to deliver satisfactory performance in the presence of fading and path loss.
description: IEEE Transaction on Mobile Computing, July 2015
Providing context to Web collections: A survey of Archive-It users
Creators: name: Mannheimer, Sara
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2013
Subjects: Metadata
Web archiving
Archives--Administration

description: This study describes a survey to users of the Internet Archive's Archive-It Web-archiving tool, aiming to examine the descriptive metadata practice of archivists of the Web, how Web archives are accessed, and what variables facilitate or impede metadata implementation in Web collections.
Whereas books often contain contextual information bound between their covers, archival materials require additional explanation of context. The Web is the most transient of electronic records, and although it is currently being preserved at a higher rate than ever before, treatment of Web collections is still not up to archival standards. Through better understanding of current Web archiving metadata practices, this study hopes to help lay groundwork for future best practices.
Data Storage and Sharing: A Needs Assessment Survey of Social Science Researchers and Information Professionals for Developing a Data Management Curriculum
Creators: name: Gooch, Amanda
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2014
Subjects: Needs assessment
Massive open online course (MOOC)
Data management

description: This study seeks to determine the needs of the social science research and information professional communities regarding data management training and education. The needs assessment surveys conducted in this study work towards answering three main questions: How do researchers and the information professionals who serve them understand the term "data management"? What are some of the gaps in data management knowledge of the social science and information professional communities that need to be addressed? What preferences do researchers and information professionals have in regards to data management training and education dissemination methods? An online needs assessment survey was e-mailed to 1,974 participants with a total response rate of 10.5%. The results of this study emphasize a broad understanding of the term "data management" with a focus on storage and sharing, a need for education on long-term data storage best practices and data management tools, as well as a preference for short, online video courses with an open discussion forum.
MPEC 2023-F148 : COMET C/1971 M1 (Edwards)
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2023
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: COMET C/1971 M1 (Edwards)

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.
Coherent measures of the impact of co-authors in peer review journals and in proceedings publications
Creators: name: Ausloos, Marcel
Publisher: name: arXiv
Year: 2015
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Digital Libraries (cs.DL)
subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: This paper focuses on the coauthor effect in different types of publications, usually not equally respected in measuring research impact. {\it A priori} unexpected relationships are found between the total coauthor core value, $m_a$, of a leading investigator (LI), and the related values for their publications in either peer review journals ($j$) or in proceedings ($p$). A surprisingly linear relationship is found: $ m_a^{(j)} + 0.4\;m_a^{(p)} = m_a^{(jp)} $. Furthermore, another relationship is found concerning the measure of the total number of citations, $A_a$, i.e. the surface of the citation size-rank histogram up to $m_a$. Another linear relationship exists : $A_a^{(j)} + 1.36\; A_a^{(p)} = A_a^{(jp)} $. These empirical findings coefficients (0.4 and 1.36) are supported by considerations based on an empirical power law found between the number of joint publications of an author and the rank of a coauthor. Moreover, a simple power law relationship is found between $m_a$ and the number ($r_M$) of coauthors of a LI: $m_a\simeq r_M^μ$; the power law exponent $μ$ depends on the type ($j$ or $p$) of publications. These simple relations, at this time limited to publications in physics, imply that coauthors are a "more positive measure" of a principal investigator role, in both types of scientific outputs, than the Hirsch index could indicate. Therefore, to scorn upon co-authors in publications, in particular in proceedings, is incorrect. On the contrary, the findings suggest an immediate test of coherence of scientific authorship in scientific policy processes.
description: 22 pages; 2 Tables; 6 Figures; 38 references; prepared for Physica A
Homosexuality and the United States Military: An Annotated Bibliography of Federal Government Information
Creators: name: Springs, Gene R.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2006
Subjects: Military policy--Bibliography
Gay military personnel--United States
Government publications--Bibliography--Gay military personnel

description: This selective annotated bibliography compiles documents made available by the federal United States government with regard to the policy of the United States Armed Forces toward homosexuals. The documents included in this bibliography range from federal regulations, such as Department of Defense directives and instructions, to Presidential executive orders, Congressional hearings, and specific military branch memorandums. While this bibliography is by no means exhaustive, it is intended to aid researchers in locating and identifying pertinent federal documents that explicate the history of the U.S. military's policy toward homosexuals, from as early as 1953 through the implementation of the "Don't Ask, Don't Tell" policy and beyond.
MS Gr. class. c. 5 1038
Creators: name: Oxyrhynchus Papyri
Publisher: name: University of Oxford
Year: 2023
Subjects: classificationCode: 470316
subject: Latin and classical Greek languages

description: P.Herc. 1151 fr. 34 fr. Q. Epicurus, De natura 15
Drawing by Carlo Orazi
Forces and pressures in adsorbing partially directed walks
Creators: name: van Rensburg, E. J. Janse
name: Prellberg, T.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences
subject: 82B41, 82B23

description: Polymers in confined spaces lose conformational entropy. This induces a net repulsive entropic force on the walls of the confining space. A model for this phenomenon is a lattice walk between confining walls, and in this paper a model of an adsorbing partially directed walk is used. The walk is placed in a half square lattice $L^2_+$ with boundary $\partial L^2_+$, and confined between two vertical parallel walls, which are vertical lines in the lattice, a distance $w$ apart. The free energy of the walk is determined, as a function of $w$, for walks with endpoints in the confining walls and adsorbing in $\partial L^2_+$. This gives the entropic force on the confining walls as a function of $w$. It is shown that there are zero force points in this model and the locations of these points are determined, in some cases exactly, and in other cases asymptotically.
Effective resonant stability of Mercury
Creators: name: Sansottera, M.
name: Lhotka, C.
name: Lemaître, A.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Dynamical Systems (math.DS)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: Mercury is the unique known planet that is situated in a 3:2 spin-orbit resonance nowadays. Observations and models converge to the same conclusion: the planet is presently deeply trapped in the resonance and situated at the Cassini state $1$, or very close to it. We investigate the complete non-linear stability of this equilibrium, with respect to several physical parameters, in the framework of Birkhoff normal form and Nekhoroshev stability theory. We use the same approach adopted for the 1:1 spin-orbit case with a peculiar attention to the role of Mercury's non negligible eccentricity. The selected parameters are the polar moment of inertia, the Mercury's inclination and eccentricity and the precession rates of the perihelion and node. Our study produces a bound to both the latitudinal and longitudinal librations (of 0.1 radians) for a long but finite time (greatly exceeding the age of the solar system). This is the so-called effective stability time. Our conclusion is that Mercury, placed inside the 3:2 spin-orbit resonance, occupies a very stable position in the space of these physical parameters, but not the most stable possible one.
description: 9 pages
Data Repositories and User Preferences: A Survey of Researchers Submitting Phylogenies to Data Repositories
Creators: name: Swauger, Shea
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2013
Subjects: Data repository
Dryad
Data archiving

description: This study collected survey data from researchers that deposited phylogenetic data in the Dryad and TreeBASE data repositories in order to better understand the factors that most influence where researchers deposit their data. Respondents were asked to rank the relative importance of eight possible factors. I found that there were strong preferences within the larger sample of TreeBASE users, and that the rankings differed significantly between TreeBASE and Dryad users. On average, TreeBASE users ranked the specialization of the repository highest and Dryad users ranked as equally highest the trust in the persistence of the repository and the ease of the data submission process. Being directed to choose a repository by a journal policy had the greatest frequency of being ranked as the most important factor in both user groups, but had a bimodal ranking distribution. Some users reported depositing their data in multiple repositories and archiving their data voluntarily.
An Online System for Evaluation of Classroom Instruction: Design and Implementation
Creators: name: Morgan, Kevin J.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2002
Subjects: Student Surveys
Student Attitudes Design--Information Systems
Test Format
Student Evaluation of Teacher Performance

description: While course content delivered via the World Wide Web is increasingly routine at major universities in the United States, barriers still exist for the online course and teaching evaluations.  This paper describes the development and pilot of an online evaluation system designed to replace a pencil-and-paper evaluation system. Similar efforts described in the literature are reviewed. The creation and implementation of a database-backed Web evaluation application is specified. Post-pilot comparisons between old and new systems are discussed making use of several measures, including a post-participation survey of students involved in the pilot.
Kinetics and thermodynamics of reversible polymerization in closed systems
Creators: name: Lahiri, Sourabh
name: Wang, Yang
name: Esposito, Massimiliano
name: Lacoste, David
Publisher: name: arXiv
Year: 2015
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Motivated by a recent work on the metabolism of carbohydrates in bacteria, we study the kinetics and thermodynamics of two classic models for reversible polymerization, one preserving the total polymer concentration and the other one not. The chemical kinetics is described by rate equations following the mass-action law. We consider a closed system and nonequilibrium initial conditions and show that the system dynamically evolves towards equilibrium where detailed balance is satisfied. The entropy production during this process can be expressed as the time derivative of a Lyapunov function. When the solvent is not included in the description and the dynamics conserves the total concentration of polymer, the Lyapunov function can be expressed as a Kullback-Leibler divergence between the nonequilibrium and the equilibrium polymer length distribution. The same result holds true when the solvent is explicitly included in the description and the solution is assumed dilute, whether or not the total polymer concentration is conserved. Furthermore, in this case a consistent nonequilibrium thermodynamic formulation can be established and the out-of-equilibrium thermodynamic enthalpy, entropy and free energy can be identified. Such a framework is useful in complementing standard kinetics studies with the dynamical evolution of thermodynamic quantities during polymerization.
Quasiparticle electronic band structure of the alkali metal chalcogenides
Creators: name: Syrotyuk, S. V.
name: Shved, V. M.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The electronic energy band spectra of the alkali metal chalcogenides M$_2$A (M: Li, Na, K, Rb; A: O, S, Se, Te) have been evaluated within the projector augmented waves (PAW) approach by means of the ABINIT code. The Kohn-Sham single-particle states have been found in the GGA (the generalized gradient approximation) framework. Further, on the basis of these results the quasiparticle energies of electrons as well as the dielectric constants were obtained in the GW approximation. The calculations based on the Green's function have been originally done for all the considered M$_2$A crystals, except Li$_2$O.
description: 8 pages, 8 figures
Comparison of Alternative Methods of Tag Presentation on Chinese Websites
Creators: name: He, Li
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2008
Subjects: Web sites--Design
Keyword indexing
Use studies--Graphical user interfaces
Use studies--Internet

description: The purpose of this study was to investigate the unique characteristics of tag presentation on Chinese websites and their usability for Chinese users. A visual search experiment was conducted with 36 Mainland Chinese participants, who performed search tasks using six different tag presentation styles. Results indicated that, for the Mainland Chinese population, a tag layout with sorting is more effective than a randomly sorted one; but whether the tags are arranged in a vertical or horizontal list or a tag cloud does not affect their search performance. This study also found that the overall degree of satisfaction was not significantly different when the Chinese users interacted with a tag cloud or a tag list. The results of this research could provide insight for website designers when designing culturally and linguistically adapted human-computer interfaces for Mainland Chinese users.
MS Gr. class. c. 5 1039
Creators: name: Oxyrhynchus Papyri
Publisher: name: University of Oxford
Year: 2023
Subjects: classificationCode: 470316
subject: Latin and classical Greek languages

description: P.Herc. 1151 Subscriptio. Epicurus, De natura 15
Drawing by Carlo Orazi
Towards a Profile of Open Government Data Users
Creators: name: O'Connor, John
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2015
Subjects: Public records
Government information--Internet resources
Linked open data

description: This paper studies the user bases of two large open data initiatives in the United States in order to determine a profile of the users of open data services. Survey data from Open Raleigh (Raleigh, NC) and DataSF (San Francisco, CA) are used in combination to determine demographics of open data users. Discussion includes implications of demographics on the future of open data initiatives and whether the demographics as they exist today are acceptable for programs funded by the public at large.
Thymbra sintenisii Bornm. & Azn.
Creators: name: Bräuchler, Christian
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Lamiales
Lamiaceae
Thymbra
Thymbra sintenisii

description: 5. Thymbra sintenisii Bornm. & Azn., in Bornmüller (1912: 471).
For a detailed anatomical and morphological study of the subspecies see Erken (2005).
description: Published as part of Bräuchler, Christian, 2018, Delimitation and revision of the genus Thymbra (Lamiaceae), pp. 15-27 in Phytotaxa 369 (1) on page 21, DOI: 10.11646/phytotaxa.369.1.2, http://zenodo.org/record/13704605
Eisenstein Polynomials over Function Fields
Creators: name: Dotti, Edoardo
name: Micheli, Giacomo
Publisher: name: arXiv
Year: 2015
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics

description: In this paper we compute the density of monic and non-monic Eisenstein polynomials of fixed degree having entries in an integrally closed subring of a function field over a finite field.
Approximating dynamic phase-field fracture in viscoelastic materials with a first-order formulation for velocity and stress
Creators: name: Thomas, Marita
name: Tornquist, Sven
name: Wieners, Christian
Publisher: name: Weierstrass Institute
Year: 2023
Subjects: subject: Visco-elastodynamic damage
subject: phase-field method
subject: discontinuous Galerkin method
subject: first-order formulation of momentum balance
subject: elastic waves in solids
subject: 74H10
subject: 74H20
subject: 35M86
subject: 35Q74
subject: 74J05
subject: 65M60

description: We investigate a model for dynamic fracture in viscoelastic materials at small strains. While the sharp crack interface is approximated with a phase-field method, we consider a viscous evolution with a quadratic dissipation potential for the phase-field variable. A non-smooth constraint enforces a unidirectional evolution of the phase-field, i.e. material cannot heal. The viscoelastic equation of motion is transformed into a first order formulation and coupled in a nonlinear way to the non-smooth evolution law of the phase field. The system is fully discretized in space and time with a discontinuous Galerkin approach for the first-order formulation. Based on this, existence of discrete solutions is shown and, as the step size in space and time tends to zero, their convergence to a suitable notion of weak solution of the system is discussed.
Staffing Virtual Reference: A Comparison of User Questions and Library Web Site Traffic at Duke University Libraries
Creators: name: Bahnaman, Stephen M.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2007
Subjects: College and university libraries
Reference services--Automation
Hours of Opening
Internet--College and university libraries

description: Synchronous virtual reference (VR) services, usually in the form of online chat interfaces or instant messaging (IM), are increasingly provided by academic libraries as a way to enhance accessibility and provide better reference services to digital native users. This study evaluates the accessibility and value of synchronous VR service at Duke University. Using a complete sample of VR transcripts from a single week, the study compares the number and content of VR inquiries with usage statistics for the library's Web site, especially areas of the site that are related to the most common types of VR questions asked. The central goal of the study is to determine the optimal hours for staffing VR by predicting user needs from Web traffic in areas that seem to generate VR questions. The analysis of question content also offers insight into user behavior, allowing for an evaluation of what kinds of questions patrons ask.