cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Breaking Rate-Distance Limitation of Measurement-Device-Independent Quantum Secret Sharing
Creators: name: Li, Chen-Long
name: Fu, Yao
name: Liu, Wen-Bo
name: Xie, Yuan-Mei
name: Li, Bing-Hong
name: Zhou, Min-Gang
name: Yin, Hua-Lei
name: Chen, Zeng-Bing
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: Cryptography and Security (cs.CR)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Currently most progresses on quantum secret sharing suffer from rate-distance bound, and thus the key rates are limited. In addition to the limited key rate, the technical difficulty and the corresponding cost together prevent large-scale deployment. Furthermore, the performance of most existing protocols is analyzed in the asymptotic regime without considering participant attacks. Here we report a measurement-device-independent quantum secret sharing protocol with improved key rate and transmission distance. Based on spatial multiplexing, our protocol shows it can break rate-distance bounds over network under at least ten communication parties. Compared with other protocols, our work improves the secret key rate by more than two orders of magnitude and has a longer transmission distance. We analyze the security of our protocol in the composable framework considering participant attacks and evaluate its performance in the finite-size regime. In addition, we investigate applying our protocol to digital signatures where the signature rate is improved more than $10^7$ times compared with existing protocols. We anticipate that our quantum secret sharing protocol will provide a solid future for multiparty applications on the quantum network.
description: 14 pages, 6 figs, arXiv admin note: text overlap with arXiv:2212.05226
The Usage of Article Databases and Electronic Journals by Academic Atmospheric Scientists
Creators: name: Kozak, Kari A.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2007
Subjects: Atmospheric Scientists--User Surveys
Online databases
Meteorologists--User Surveys
Information Seeking Behavior--Electronic
Electronic periodicals

description: Researchers in the atmospheric science field rely on journal articles to gather information relevant to their work. These scientists use electronic journals and article databases more and more. Their use of these interfaces prompts questions of how they actually conduct their searches and, more specifically, what tools they utilize. This paper examines questionnaire responses from academic atmospheric scientists on why and how they use these databases. The data from these questionnaires were analyzed for trends. The results confirmed that many atmospheric scientists use article databases and electronic journals to find current as well as older literature. The results did not offer any startling discoveries but did help verify previous beliefs that atmospheric scientists use article databases and electronic journals regularly. These results can ultimately be used for the design of both better interfaces and more effective instructional courses.
Heegaard Floer homology of spatial graphs
Creators: name: Harvey, Shelly
name: O'Donnol, Danielle
Publisher: name: arXiv
Year: 2015
Subjects: subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: 57M

description: We extend the theory of combinatorial link Floer homology to a class of oriented spatial graphs called transverse spatial graphs. To do this, we define the notion of a grid diagram representing a transverse spatial graph, which we call a graph grid diagram. We prove that two graph grid diagrams representing the same transverse spatial graph are related by a sequence of graph grid moves, generalizing the work of Cromwell for links. For a graph grid diagram representing a transverse spatial graph $f:G \rightarrow S^3$, we define a relatively bigraded chain complex (which is a module over a multivariable polynomial ring) and show that its homology is preserved under the graph grid moves; hence it is an invariant of the transverse spatial graph. In fact, we define both a minus and hat version. Taking the graded Euler characteristic of the homology of the hat version gives an Alexander type polynomial for the transverse spatial graph. Specifically, for each transverse spatial graph $f$, we define a balanced sutured manifold $(S^3\smallsetminus f(G), γ(f))$. We show that the graded Euler characteristic is the same as the torsion of $(S^3\smallsetminus f(G), γ(f))$ defined by S. Friedl, A. Juhász, and J. Rasmussen. This paper is dedicated to the memory of Tim Cochran.
description: 59 pages, 51 figures
Increasing Information Security with Mandatory Access Controls in the Operating System
Creators: name: Lauber, Susan M.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2006
Subjects: Computer Security--Operating Systems
Computer Security--Access Control
Computer Security--Internet

description: Access control is a fundamental problem in all businesses and controlling access to computer and network resources is fundamental to information security. The distributed nature of the Internet makes complete and centralized control impossible, especially if there is a desire to have the security measures appear as seamless to the user as possible. Many layers of protection exist and each layer protects against different threats but with multiple vulnerabilities reported each day it is impossible to protect against all threats. The next best thing is to contain the attacks. One method of containing attacks is the use of mandatory access controls, not only in applications, but also in the operating system. The information provided in this paper should cut through the confusion associated with the many security solutions and assist in the development of an access control policy.
Bibliographie der Geschichte, Landes- und Volkskunde von Stadt und Kanton Zürich: August 1986-August 1987
Creators: name: Kohler, Ludwig
Publisher: name: Buchdruckerei a/d Sihl AG
Year: 1987
Subjects: subject: 010 Bibliografie
subject: Kanton Zürich
subject: Zürich
subject: Bibliografie
subject: Geschichte
subject: Landeskunde
subject: Volkskunde

description: Separatdruck aus dem Zürcher Taschenbuch auf das Jahr 1988.
Pinguicula filifolia Wright ex Grisebach 1866
Creators: name: Domínguez, Yoannis
name: Valdés, Cristina Mercedes Panfet
name: Miranda, Vitor Fernandes Oliveira
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Lamiales
Lentibulariaceae
Pinguicula
Pinguicula filifolia

description: Pinguicula filifolia Wright ex Grisebach (1866: 162)
 Protologue locality:— Cuba occ.
 Type (lectotype, designated here):— [CUBA]. Cuba occ.[identali], 1865, C. Wright 2886 [=560] (GOET barcode GOET004568 [digital photo!], isolectotype US No. 48178 barcode 00136346 [digital photo!]; image of the lectotype is available at http://gwdu64.gwdg. de/pls/herbar/typen$typen.QueryViewByKey? P _ ID =9200& Z _CHK=5068).
 Note:— Pinguicula filifolia was described by Grisebach (1866) based on a specimen collected by C. Wright in Western Cuba (560, Wright 2886). In the same way as for P. albida, Casper (1966) cited “ holotype ” (P) and “ isotype ” (MO) and Howard (1988) selected the specimen at GOET as “ holotype ”; nevertheless, Howard’s typification was not effectively published. During our searches we have traced nine specimens collected by Wright (2886) housed at G, GOET, HAC, MA, MO, NY, P, US and YU but its examination reveleaved the same incongruences regarding the information on the labels (collection year) as found in other Wright’s specimens (see note on P. albida for details). Therefore, we have selected the GOET specimen as lectotype according to Arts. 9.2, 9.3, 9.11 and 9.13 of the ICN (McNeill et al. 2012) and just the specimen housed at US, which bears the same collection year (1865), is recognized as isolectotype (Rec. 9 C).
description: Published as part of Domínguez, Yoannis, Valdés, Cristina Mercedes Panfet & Miranda, Vitor Fernandes Oliveira, 2017, Typification of names in the genus Pinguicula L. (Lentibulariaceae), pp. 179-198 in Phytotaxa 312 (2) on pages 184-185, DOI: 10.11646/phytotaxa.312.2.2, http://zenodo.org/record/13701461
MS Gr. class. c. 2 284
Creators: name: Oxyrhynchus Papyri
Publisher: name: University of Oxford
Year: 2023
Subjects: classificationCode: 470316
subject: Latin and classical Greek languages

description: P.Herc. 307 fr. 2. Chrysippus, Quaestiones logicae
Drawing by Carlo Orazi
Critical current density, vortex dynamics, and phase diagram of FeSe single crystal
Creators: name: Sun, Yue
name: Pyon, Sunseng
name: Tamegai, Tsuyoshi
name: Kobayashi, Ryo
name: Watashige, Tatsuya
name: Kasahara, Shigeru
name: Matsuda, Yuji
name: Shibauchi, Takasada
Publisher: name: arXiv
Year: 2015
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We present a comprehensive study of the vortex pinning and dynamics in a high-quality FeSe single crystal, which is free from doping introduced inhomogeneities and charged quasi-particle-scattering because of its innate superconductivity. Critical current density, $J_c$, is found to be almost isotropic, and reaches a value $\sim$ 3 $\times$ 10$^4$ A/cm$^2$ at 2 K (self-field) for both $H$ $\|$ $c$ and $ab$. The normalized magnetic relaxation rate $S$ (= $\mid$dln$M$/dln$t$$\mid$) shows a temperature insensitive plateau behavior in the intermediate temperature range with a relatively high creep rate ($S$ $\sim$ 0.02 under zero field), which is interpreted in the framework of the collective creep theory. A crossover from the elastic to plastic creep is observed, while the fish-tail effect is absent for both $H$ $\|$ $c$ and $ab$. Based on this observation, the origin of the fish-tail effect is also discussed. Combining the results of $J_c$ and $S$, vortex motion in FeSe single crystal is found to be dominated by sparse strong point-like pinning from nm-sized defects or imperfections. The weak collective pinning is also observed and proved in the form of large bundles. Besides, the vortex phase diagram of FeSe is also constructed and discussed.
description: 7 pages, 5 figures
Closed Stacks, Open Doors: An Annotated Bibliography of Public Services within Special Collections
Creators: name: Davis, Ashley K.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2010
Subjects: Public relations of libraries--College and university libraries
Special collections

description: Special collections librarianship is rapidly changing; new technologies, electronic reference services, and increased digitization of collections have profoundly affected all areas of special collections work. It has been noted that special collections have moved out of the 'treasure room' and into the 'school room,' as more emphasis is placed on drawing users into the library to use rare and unique materials. This bibliography assembles and evaluates special collections resources and highlights trends, standards, and accepted best practices within the field, specifically with regard to issues that have emerged from this newfound approach to special collections public services.     To present a current view of special collections, the bibliography is limited to resources published between 2000 and 2010. Peer-reviewed articles, monographs, and official organizational guidelines (ALA, ACRL, RBMS) are included. Resources selected for annotation are arranged in four categories representing facets of special collections work: access, instruction, outreach/collection use, and professional development.
MS Gr. class. c. 2 285
Creators: name: Oxyrhynchus Papyri
Publisher: name: University of Oxford
Year: 2023
Subjects: classificationCode: 470316
subject: Latin and classical Greek languages

description: P.Herc. 307 fr. 3. Chrysippus, Quaestiones logicae
Drawing by Carlo Orazi
Pinguicula macrophylla Kunth
Creators: name: Domínguez, Yoannis
name: Valdés, Cristina Mercedes Panfet
name: Miranda, Vitor Fernandes Oliveira
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Lamiales
Lentibulariaceae
Pinguicula
Pinguicula macrophylla

description: Pinguicula macrophylla Kunth in Bonpland & Humboldt (1817: 226)
 Protologue locality:—Crescit in Novae Hispaniae collibus inter urbem Guanaxuato et pagum Santa Rosa.
 Type (lectotype, designated by Casper 1966: 114):— [MEXICO]. S. Rosa, s.d., s. coll. [A. J. A. Bonpland & F. W. H. A. von Humboldt s.n.] (P barcode P00670051!, isolectotype Am.[érique] équat.[oriale], s.d., s. coll. [A. J. A. Bonpland & F. W. H. A. von Humboldt] 4117, P barcode P00072092!, fragments 2 and 3; image of the lectotype is available at http://coldb.mnhn.fr/catalognumber/mnhn/p/ p00670051).
 Note:—In the description of P. macrophylla (Kunth in Bonpland & Humboldt 1817: 226), the author mentioned a nonspecific locality between Guanajuato and Santa Rosa. Two original specimens associated to P. macrophylla were cited by Casper (1966) as “ holotype ” (P) and “ isotype ” (P-Bonpl) respectively. These specimens were found at MNHN-P and they partially fit the locality cited in the protologue (S. Rosa); therefore, it should be considered syntypes according to Art. 9.5 of the ICN (McNeill et al. 2012). Following Casper’s citation, and according to the observation above, we herein correct Casper’s citation to lectotype and isolectotype respectively. The sheet P 00072092, labeled “ Pinguicula macrophylla ”, bears an unnumbered Bonpland’s handwritten label stating: “ Pinguicula macrophylla, foliis subrotundo ovalibus apice obtusis planis. Habitat ni [in] collibus Novae Hispaniae, niter [inter] Guanajuato et Santa Rosa” and is stamped “ Isotype ”. This sheet has been regarded as an admixture specimen (Casper 1966, Zamudio 2001) containing parts of P. macrophylla, P. moranensis and P. heterophylla, and it has also been identified as Pinguicula caudata Schlechtendal (1832: 393) and Pinguicula mexicana Bonpland ex Casper (1966: 139). The fragments are numebered: 1) a winter rosette with a sterile scape, 2) a fruiting scape, 3) a summer leaf, and 4) a flowering scape; and they were identified by Casper (review label dated on 1963), in accordance with Art. 9.14 of the ICN (McNeill et al. 2012), as P. moranensis (1), P. macrophylla (2, 3) and P. heterophylla (4). Besides that, the collector number in the specimen’s label (4117) is directly related to P. moranensis (see note on P. moranensis), therefore, just fragments 2 and 3 are recognized here as isolectotypes due to the original association of this sheet with the name P. macrophylla and the locality that appears in Bonpland’s label.
description: Published as part of Domínguez, Yoannis, Valdés, Cristina Mercedes Panfet & Miranda, Vitor Fernandes Oliveira, 2017, Typification of names in the genus Pinguicula L. (Lentibulariaceae), pp. 179-198 in Phytotaxa 312 (2) on page 188, DOI: 10.11646/phytotaxa.312.2.2, http://zenodo.org/record/13701461
A rational approximation of the Dawson's integral for efficient computation of the complex error function
Creators: name: Abrarov, S. M.
name: Quine, B. M.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: In this work we show a rational approximation of the Dawson's integral that can be implemented for high-accuracy computation of the complex error function in a rapid algorithm. Specifically, this approach provides accuracy exceeding $\sim {10^{ - 14}}$ in the domain of practical importance $0 \le y < 0.1 \cap \left| {x + iy} \right| \le 8$. A Matlab code for computation of the complex error function with entire coverage of the complex plane is presented.
description: 37 pages, 7 figures
MS Gr. class. c. 2 286
Creators: name: Oxyrhynchus Papyri
Publisher: name: University of Oxford
Year: 2023
Subjects: classificationCode: 470316
subject: Latin and classical Greek languages

description: P.Herc. 307 col. 1. Chrysippus, Quaestiones logicae
Drawing by Carlo Orazi
Nonequilibrium Full Counting Statistics and Symmetry-Resolved Entanglement from Space-Time Duality
Creators: name: Bertini, Bruno
name: Calabrese, Pasquale
name: Collura, Mario
name: Klobas, Katja
name: Rylands, Colin
Publisher: name: arXiv
Year: 2022
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Theory (hep-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Due to its probabilistic nature, a measurement process in quantum mechanics produces a distribution of possible outcomes. This distribution - or its Fourier transform known as full counting statistics (FCS) - contains much more information than say the mean value of the measured observable and accessing it is sometimes the only way to obtain relevant information about the system. In fact, the FCS is the limit of an even more general family of observables - the charged moments - that characterise how quantum entanglement is split in different symmetry sectors in the presence of a global symmetry. Here we consider the evolution of the FCS and of the charged moments of a U(1) charge truncated to a finite region after a global quantum quench. For large scales these quantities take a simple large-deviation form, showing two different regimes as functions of time: while for times much larger than the size of the region they approach a stationary value set by the local equilibrium state, for times shorter than region size they show a non-trivial dependence on time. We show that, whenever the initial state is also U(1) symmetric, the leading order in time of FCS and charged moments in the out-of-equilibrium regime can be determined by means of a space-time duality. Namely, it coincides with the stationary value in the system where the roles of time and space are exchanged. We use this observation to find some general properties of FCS and charged moments out-of-equilibrium, and to derive an exact expression for these quantities in interacting integrable models. We test this expression against exact results in the Rule 54 quantum cellular automaton and exact numerics in the XXZ spin-1/2 chain.
description: 7+12 pages, 3+5 figures; v2 references added; v3 presentation improved, as appears in PRL
Optimal control of nonlocal continuity equations: numerical solution
Creators: name: Chertovskih, Roman
name: Pogodaev, Nikolay
name: Staritsyn, Maxim
Publisher: name: arXiv
Year: 2022
Subjects: subject: Optimization and Control (math.OC)
subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics
subject: 49K20, 49J45, 93C20

description: The paper addresses an optimal ensemble control problem for nonlocal continuity equations on the space of probability measures. We admit the general nonlinear cost functional, and an option to directly control the nonlocal terms of the driving vector field. For this problem, we design a descent method based on Pontryagin's maximum principle (PMP). To this end, we derive a new form of PMP with a decoupled Hamiltonian system. Specifically, we extract the adjoint system of linear nonlocal balance laws on the space of signed measures and prove its well-posedness. As an implementation of the designed descent method, we propose an indirect deterministic numeric algorithm with backtracking. We prove the convergence of the algorithm and illustrate its modus operandi by treating a simple case involving a Kuramoto-type model of a population of interacting oscillators.
Product, Process, and Photographs: Archival Workflows and More Product Less Process (MPLP) in Large Film Photography Collections
Creators: name: Moore, Jesse
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2018
Subjects: Workflow
Archival processing
Photography archives

description: This study explored the workflows used by institutions for processing large film photography collections. I conducted semi-structured interviews with professionals from seven cultural heritage institutions and created workflow maps to visualize the procedures that each institution followed when processing their collections. By creating these workflow maps, I intended to demonstrate the similarities and differences between the institutions’ arrangement and description practices for processing large film photography collections. I also asked participants questions to investigate whether Greene and Meissner’s More Product Less Process recommendations influenced how their institutions processed large film photography collections. Although each of the participating institutions described some or all of their collections at the item level, many used aspects of minimal processing in their workflows.
Choquard equation involving mixed local and nonlocal operators
Creators: name: Anthal, Gurdev C.
name: Giacomoni, Jacques
name: Sreenadh, Konijeti
Publisher: name: arXiv
Year: 2022
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: In this article, we study an elliptic problem involving an operator of mixed order with both local and nonlocal aspects and in the presence of critical nonlinearity of Hartree type. To this end, we first investigate the corresponding Hardy-Littlewood-Sobolev inequality and detect the optimal constant. Using variational methods and a Pohožaev identity we then show the existence and nonexistence results for the corresponding subcritical perturbation problem.
Scalar perturbations in the late Universe: viability of the Chaplygin gas models
Creators: name: Bouhmadi-López, Mariam
name: Brilenkov, Maxim
name: Brilenkov, Ruslan
name: Morais, João
name: Zhuk, Alexander
Publisher: name: arXiv
Year: 2015
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study the late-time evolution of the Universe where dark energy (DE) is parametrized by a modified generalized Chaplygin gas (mGCG) on top of cold dark matter (CDM). We also take into account the radiation content of the Universe. In this context, the late stage of the evolution of the universe refers to the epoch where CDM is already clustered into inhomogeneously distributed discrete structures (galaxies, groups and clusters of galaxies). Under these conditions, the mechanical approach is an adequate tool to study the Universe deep inside the cell of uniformity. To be more accurate, we study scalar perturbations of the Friedmann-Lemaître-Robertson-Walker metric due to inhomogeneities of CDM as well as fluctuations of radiation and mGCG, the later driving the late-time acceleration of the universe. Our analysis applies as well to the case where mGCG plays the role of DM and DE. We select the sets of parameters of the mGCG that are compatible with the mechanical approach. These sets define prospective mGCG models. By comparing the selected sets of models with some of the latest observational data results, we conclude that the mGCG is in tight agreement with those observations particularly for a mGCG playing the role of DE and DM.
description: 18 pages, no figures. Discussion improved. Version accepted in JCAP
Library Assessment Practices in North Carolina Public Libraries: What are they measuring and how are they measuring it?
Creators: name: Sinnott, Amy E.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2011
Subjects: Public libraries--North Carolina
Research techniques--Evaluation
Public libraries--Evaluation

description: Assessment and evaluation of library performance can inform both internal and external decision making, and libraries are increasingly being held accountable to a variety of stakeholders; therefore, it is important that any measurements of library use, services, collections, and patron attitudes reflect the value and impact of the library. Traditionally, libraries have demonstrated their worth via input and output measures, but the demand has increased for public libraries to begin measuring more complex outcome measures to assess their performance. This research study involved a survey of the 77 public library systems of North Carolina about what performance concepts they are measuring, how they are measuring these concepts, and identifying any barriers to collecting performance measures. The study found that NC public libraries are now commonly measuring input and output measures, while beginning to assess more complex performance concepts as the demand for demonstrating value and impact increases.
Application of the cell painting assay for pseudo-natural product projects
Creators: name: Zinken, Sarah
Publisher: name: TU Dortmund
Year: 2022
Subjects: subject: Pseudo-Naturstoffe
subject: Pseudo-natural products
subject: Small molecules
subject: Cell painting assay
subject: Morphological profiling
subject: Phenotypic assays
subject: Autophagy
subject: 570
subject: 540
subject: Naturstoffchemie
subject: Autophagie, Physiologie

description: Considering that natural products (NPs) underwent evolutionary selection to bind to their biological targets and therefore represent biologically prevalidated chemical matter, they can serve as a valuable source of inspiration. In the pseudo-NP (PNP) approach, NP fragments are combined by means of chemical methodologies in new arrangements that are not observed in nature. PNPs are designed to share the NP fragments’ high probability to bind to macromolecular targets but also may explore novel areas of biological space as they are structurally distinct from NPs. Phenotypic screening methods, particularly the cell-painting assay (CPA), have been investigated as powerful tools for the biological evaluation of PNPs since they may have unexpected bioactivities. Herein, a PNP class derived from a quinine- and azaindole-fragments was proven to inhibit the autophagy signalling pathway. Comparison of its morphological profile from the CPA to reference compound profiles with annotated bioactivity hinted towards a kinase target. Further investigation proved this hypothesis and identified VPS34 kinase as a potential autophagy-related target. This study highlighted the impact that the CPA can have on the target identification of bioactive PNPs. CPA analysis of diverse PNP compound classes derived from a small fragment subset, allowed the investigation of fragment combinations on morphological profiles. It was shown that fragments can either have a dominating or non-dominating effect on the morphological activity of PNPs that could also be proven in behaviour predictions. This led to the suggestion to use non-dominating fragments to design PNPs with unique and potentially novel bioactivities. Taking inspiration from previous PNP examples, a novel chromane- and 4H-quinoline-derived compound class was designed. The development of a suitable synthetic route resulted in a chromaline compound library that was subsequently tested in the CPA. Comparison with the inspiring PNP classes (chromopynone and pyrroquinoline) revealed, that both fragments were non-dominating and therefore suitable for the design of unique PNPs. Furthermore, the novel chromaline compound class showed high chemical and morphological diversity. Overall, design strategies with the guiding principle of PNPs were employed to generate compound libraries that were evaluated and biologically characterised by the cell painting assay.
Coreless vortices as direct signature of chiral $d$-wave superconductivity
Creators: name: Holmvall, Patric
name: Black-Schaffer, Annica M.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Chiral $d$-wave superconductivity has been proposed in a number of different materials, but characteristic experimental fingerprints have been largely lacking. We show that quadruply quantized coreless vortices are prone to form and offer distinctive signatures of the chiral $d$-wave state in both the local density of states and the total magnetic moment. Their dissimilarity in positive versus negative magnetic fields further leads to additional spontaneous symmetry breaking, producing clear evidence of time-reversal symmetry breaking, chiral superconductivity, and the Chern number.
description: 7 pages, 4 figures, Supplemental Material: 11 pages, 12 figures
MS Gr. class. c. 2 287
Creators: name: Oxyrhynchus Papyri
Publisher: name: University of Oxford
Year: 2023
Subjects: classificationCode: 470316
subject: Latin and classical Greek languages

description: P.Herc. 307 col. 2. Chrysippus, Quaestiones logicae
Drawing by Carlo Orazi
Young Adult Nonfiction Collection Development Practices in One Public Library System
Creators: name: Mosedale, Amanda D.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2011
Subjects: Collection development
Young adult literature
Young adults reading

description: Numerous researchers have examined the reading interests of young adults and concluded that they have a strong interest in reading nonfiction. Despite these findings, the young adult nonfiction collections in public libraries continue to be far smaller than the young adult fiction collections. This is the first study to explore this disconnect between research findings and the reality of young adult nonfiction collection development practices in public libraries. In this exploratory study, the librarians who work with young adult materials and patrons in one public library system were interviewed in an attempt to discover what issues may be keeping public libraries from developing young adult nonfiction collections large enough to meet young adults' nonfiction reading needs. The results showed a large number of obstacles that might hinder the development of young adult nonfiction collections in public libraries and suggest some ways in which those obstacles may be overcome.
Nonsmooth manifold decompositions
Creators: name: Horvat, Eva
Publisher: name: arXiv
Year: 2022
Subjects: subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: 57N80, 57M50, 57R45

description: We study the structure induced on a smooth manifold by a continuous selection of smooth functions. In case such selection is suitably generic, it provides a stratification of the manifold, whose strata are algebraically defined smooth submanifolds. When the continuous selection has nondegenerate critical points, stratification descends to the local topological structure. We analyze this structure for the maximum of three smooth functions on a 4-manifold, which provides a new perspective on the theory of trisections.
description: 21 pages, 5 figures
$*$-isomorphism of Leavitt path algebras over $\mathbb{Z}$
Creators: name: Carlsen, Toke Meier
Publisher: name: arXiv
Year: 2016
Subjects: subject: Rings and Algebras (math.RA)
subject: Operator Algebras (math.OA)
subject: FOS: Mathematics

description: We characterise when the Leavitt path algebras over $\mathbb{Z}$ of two arbitrary countable directed graphs are $*$-isomorphic by showing that two Leavitt path algebras over $\mathbb{Z}$ are $*$-isomorphic if and only if the corresponding graph groupoids are isomorphic (if and only if there is a diagonal preserving isomorphism between the corresponding graph $C^*$-algebras). We also prove that any $*$-homomorphism between two Leavitt path algebras over $\mathbb{Z}$ maps the diagonal to the diagonal. Both results hold for slight more general subrings of $\mathbb{C}$ than just $\mathbb{Z}$.
description: 9 pp. Thm 1 and Cor 5 have been changed to emphasize that the *-homomorphisms are *-algebra homomorphisms. The references [6], [10], [12] and [21] have been added, and the remarks following Thm 1 have been updated in order to reflect new results in these papers. There is no longer any Remark 4, so Prop 5 has become Prop 4, and Cor 6 has become Cor 5. This is the version that will be published
A comparative analysis of how the technological innovativeness of web sites varies across four industries
Creators: name: Neu, Noelle E.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2000
Subjects: Web sites
Web sites--Evaluation
Design--Evaluation

description: This study surveys 80 company web sites within four industry categories (high technology, financial services, healthcare and retail). All 80 web sites represent companies included in the 1999 Fortune 500 list. The purpose of the study was to investigate whether statistically significant differences existed among the four industries in terms of technological innovation of the companies' web sites. A list of 20 variables, each representing a different web site technology, was developed and used to evaluate all 80 web sites. As expected, the companies representing the high technology industry had the higher average number of technologies implemented on their web sites among the four industries, followed by finance, retail and healthcare. Certain analysis indicates varying degrees of statistical significance to support these results. Data indicates that companies conducting electronic commerce frequently implemented a wider variety of variables than those not engaging in e-commerce.
On bisectors in quaternionic hyperbolic space
Creators: name: Almeida, Igor A. R.
name: Chamorro, Jaime L. O.
name: Gusevskii, Nikolay
Publisher: name: arXiv
Year: 2022
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 20H10, 22E40, 32G07, 57S30

description: In this paper, we study a problem related to geometry of bisectors in quaternionic hyperbolic geometry. We develop some of the basic theory of bisectors in quaternionic hyperbolic space $H^n_Q$. In particular, we show that quaternionic bisectors enjoy various decompositions by totally geodesic submanifolds of $H^n_Q$. In contrast to complex hyperbolic geometry, where bisectors admit only two types of decomposition (described by Mostow and Goldman), we show that in the quaternionic case geometry of bisectors is more rich. The main purpose of the paper is to describe an infinite family of different decompositions of bisectors in $H^n_Q$ by totally geodesic submanifolds of $H^n_Q$ isometric to complex hyperbolic space $H^n_C$ which we call the fan decompositions. Also, we derive a formula for the orthogonal projection onto totally geodesic submanifolds in $H^n_Q$ isometric to $H^n_C$. Using this, we introduce a new class of hypersurfaces in $H^n_Q$, which we call complex hyperbolic packs in $H^n_Q$. We hope that the complex hyperbolic packs will be useful for constructing fundamental polyhedra for discrete groups of isometries of quaternionic hyperbolic space.
description: 24 pages
What Do Composition Faculty Want Their Students to Learn? Examining Source Evaluation
Creators: name: Becksford, Lisa
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2015
Subjects: Librarian-Teacher cooperation
Information literacy
Academic libraries--Relations with faculty & curriculum

description: Over the last 25 years, library instruction has come to include not only teaching students how to find sources, but also how to critically evaluate information. A common place for such instruction is the composition classroom, but little research has been done to learn about the attitudes of composition faculty in regards to teaching students these skills. Through interviews with composition instructors in North Carolina State University's first-year writing program (FYWP), this study sought to learn about the attitudes of composition instructors towards teaching students to evaluate sources, including what students should learn and who should teach them. Participants' responses indicate that composition instructors want their students to be able to distinguish between reliable and unreliable sources and develop a basic understanding of the context of scholarly communication. In addition, most participants believed that some form of collaboration with the library was the best way to teach source evaluation.
Hermitian Topologies originating from non-Hermitian braidings
Creators: name: Rui, W. B.
name: Zhao, Y. X.
name: Wang, Z. D.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The complex energy bands of non-Hermitian systems braid in momentum space even in one dimension. Here, we reveal that the non-Hermitian braiding underlies the Hermitian topological physics with chiral symmetry under a general framework that unifies Hermitian and non-Hermitian systems. Particularly, we derive an elegant identity that equates the linking number between the knots of braiding non-Hermitian bands and the zero-energy loop to the topological invariant of chiral-symmetric topological phases in one dimension. Moreover, we find an exotic class of phase transitions arising from the critical point transforming different knot structures of the non-Hermitian braiding, which are not included in the conventional Hermitian topological phase transition theory. Nevertheless, we show the bulk-boundary correspondence between the bulk non-Hermitian braiding and boundary zero-modes of the Hermitian topological insulators. Finally, we construct typical topological phases with non-Hermitian braidings, which can be readily realized by artificial crystals.
description: 10 pages, 9 figures. Published in Phys. Rev. B
MS Gr. class. c. 2 288
Creators: name: Oxyrhynchus Papyri
Publisher: name: University of Oxford
Year: 2023
Subjects: classificationCode: 470316
subject: Latin and classical Greek languages

description: P.Herc. 307 col. 3. Chrysippus, Quaestiones logicae
Drawing by Carlo Orazi
The Solar Twin Planet Search II. A Jupiter twin around a solar twin
Creators: name: Bedell, M.
name: Melendez, J.
name: Bean, J. L.
name: Ramirez, I.
name: Asplund, M.
name: Alves-Brito, A.
name: Casagrande, L.
name: Dreizler, S.
name: Monroe, T.
name: Spina, L.
name: Maia, M. Tucci
Publisher: name: arXiv
Year: 2015
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Through our HARPS radial velocity survey for planets around solar twin stars, we have identified a promising Jupiter twin candidate around the star HIP11915. We characterize this Keplerian signal and investigate its potential origins in stellar activity. Our analysis indicates that HIP11915 hosts a Jupiter-mass planet with a 3800-day orbital period and low eccentricity. Although we cannot definitively rule out an activity cycle interpretation, we find that a planet interpretation is more likely based on a joint analysis of RV and activity index data. The challenges of long-period radial velocity signals addressed in this paper are critical for the ongoing discovery of Jupiter-like exoplanets. If planetary in nature, the signal investigated here represents a very close analog to the solar system in terms of both Sun-like host star and Jupiter-like planet.
description: 8 pages, 5 figures; A&A accepted; typos corrected in this version
Web page support for use of slang terms during Internet searching in sexual and reproductive health
Creators: name: Dockendorf, Dionne M.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2002
Subjects: Internet searching
Reproductive Health
Contraception--Slang

description: This study evaluates the use of slang terms to locate reproductive and sexual health information on the Internet. Many users looking for health information, including adolescents and low literacy populations, may not use technical terms as search terms when searching the Internet. This study aimed to discover the type of sites retrieved using slang terms for condom in English and Spanish. The slang terms in each language were searched in the Google search engine. The English terms retrieved 3.5 percent relevant sites and the Spanish terms retrieved 19.5 percent relevant sites. Clearly, the reproductive and sexual health sites aiming to provide users with accurate health information are not reaching users that may not have knowledge of technical terms and instead use slang terms to search. These sites should re-evaluate the terms they include in their text and/or metadata in order to serve a more diverse community of users.
Russian Émigré Press Publications in the André Savine Collection: A Bibliographic Inventory of U.S.-published Periodicals
Creators: name: Trembach, Stanislav
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2006
Subjects: Russian periodicals--United States--20th century
Exiles--Russia(Federation)--Bibliography--Periodicals
Russia(Federation)--Emigration and immigration--History--20th century
Russians--Foreign countries

description: The purpose of this paper is to establish the bibliographic information on the Russian émigré periodicals published in the United States between 1917 and 1993 and currently held in a portion of the André Savine Collection. The library at the University of North Carolina at Chapel Hill purchased the Savine Collection in the spring of 2002. Collection materials have not been cataloged, and very little research has been done to establish bibliographic data of the Collection holdings, with the exception of the military periodicals section described and analyzed by Nicolae Harsanyi in 2004. This paper represents a similar attempt at providing a bibliographic inventory of another significant part of the Collection. Information for the bibliographic inventory was obtained from a variety of bibliographic sources, including American and Russian publisher's catalogs, and records of current library holdings. These data were subsequently analyzed against the originals available in the Savine Collection.
Better Intelligence Through Microblogging: Text Mining Tweets for Actionable Information
Creators: name: Croll, Meghan
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2013
Subjects: Text mining
Microblogs
Relevance ranking (Information science)

description: The goal of this paper is to evaluate specific event-related Twitter posts, called tweets, for their usability as intelligence data. Using text mining software for Natural Language Processing to attempt to establish the best keyword search strategy for actionable information, 2000 tweets documenting 2 independent events were analyzed. Additionally, the Twitter users who provided the tweets were evaluated for source reliability to determine if their information was likely to be credible.
The results of this study suggest that the best information retrieval strategy for tweets featuring reliable and actionable information, is to use hashtagged topics and/or location details as search keywords. Not only is "location" frequently a facet of determining actionability, the co-location of event and user increases the likelihood of a high-reliability source.
Quantum speed limit for complex dynamics
Creators: name: Zhang, Mao
name: Yu, Huai-Ming
name: Liu, Jing
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Physics (quant-ph)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: Quantum speed limit focuses on the minimum time scale for a fixed mission and hence is important in quantum information where fast dynamics is usually beneficial. Most existing tools for the depiction of quantum speed limit are the lower-bound-type tools, which are in fact difficult to reveal the true minimum time, especially for many-body systems or complex dynamics. Therefore, the evaluation of this true minimum time in these scenarios is still an unsolved problem. Hereby we propose a three-step (classification-regression-calibration) methodology based on machine learning to evaluate the true minimum time in complex dynamics. Moreover, the analytical expression of the true minimum time is also provided for the time-dependent Hamiltonians with time-independent eigenstates.
description: 7+17 pages, 14 figures, 1 table, close to the published version
Quantum many-body fluctuations around nonlinear Schrödinger dynamics
Creators: name: Boccato, Chiara
name: Cenatiempo, Serena
name: Schlein, Benjamin
Publisher: name: arXiv
Year: 2015
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We consider the many body quantum dynamics of systems of bosons interacting through a two-body potential $N^{3β-1} V (N^βx)$, scaling with the number of particles $N$. For $0< β< 1$, we obtain a norm-approximation of the evolution of an appropriate class of data on the Fock space. To this end, we need to correct the evolution of the condensate described by the one-particle nonlinear Schrödinger equation by means of a fluctuation dynamics, governed by a quadratic generator.
description: 78 pages, acknowledgements added
Exploring How to Evaluate The “Textbookiness” of a Textbook According to Librarians
Creators: name: Baker, Amanda
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2018

description: This paper aims to discover what librarians thought about Open Access Textbooks: namely what criteria they felt was pertinent to help users make an informed decision about their resource. Affordability and access to education materials is ideal in a world which aims to provide certain human rights, i.e. education. Prior to this research, no research existed pertaining to librarian’s opinions about essential metadata. Thus, librarians were shown a rubric and asked to evaluate each criterion ranging from title information to user friendliness on the web. It was discovered, that much of this information was valuable in determining which criteria were most useful to a user.
MS Gr. class. c. 2 289
Creators: name: Oxyrhynchus Papyri
Publisher: name: University of Oxford
Year: 2023
Subjects: classificationCode: 470316
subject: Latin and classical Greek languages

description: P.Herc. 307 col. 4. Chrysippus, Quaestiones logicae
Drawing by Carlo Orazi
Online Chat Reference: The Awareness of, Use of, Interest in, and Marketing of This New Reference Service Technology
Creators: name: Johnson, Corey M.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2002
Subjects: College and university libraries--Reference services
Reference services--Automation
Deans Achievement Award--Best Masters Papers Awarded 2003
Surveys--Reference services
Reference services--North Carolina
Reference services--Evaluation

description: Reference librarians have converted a significant portion of library resources to electronic format and now they must contemplate moving the reference interview itself to the electronic environment. This study consisted of survey and interview components carried out at the University of North Carolina at Chapel Hill and the University of North Carolina at Greensboro. The survey inquired about university affiliates' awareness of, use of, and interest in reference services, with a particular focus on online chat reference. Three librarians were interviewed, who provided information about the development and marketing of the online chat reference service at their respective institutions. Survey respondents reported strong prior usage of face-to-face reference and a desire to use this service first when pursuing research topics. Awareness and use of the online chat reference service at each institution was comparatively low, but respondents forecasted the service would be among the most heavily used in ten years.