cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Faceted Subject Access to Music: An Evaluation of the Music Thesaurus Project
Creators: name: Cronquist, Michelle
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2004
Subjects: Subject headings, Library of Congress
Thesauri
Subject Headings Music
Music Literature and Scores Cataloging

description: The Music Thesaurus Project is an initiative to develop a faceted thesaurus for music materials. The Library of Congress Subject Headings provide inadequate subject access to music in many ways, such as a lack of specificity and an incomplete syndetic structure, and its music headings are complex and difficult to construct. In addition, current music cataloging practice does not provide adequate access to non-Western and popular music. The Music Thesaurus would solve these problems by separating concepts into facets and building a complete syndetic structure, practices that will aid in the retrieval of Western art music as well as non-Western and popular music. This study evaluates the proposed structure for the Music Thesaurus and makes recommendations for improvement.
An anomalous band inversion protected by symmetry in a topological insulator of the Kane-Mele model
Creators: name: Yu, Jie-Xiang
name: Che, J. G.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences
subject: J.2

description: Depositing Au on a graphene derivate, which involves substituting four C atoms with three N atoms in a $3\times 3$ cell graphene, we realized a topological insulator of the Kane-Mele model with a gap of 50~meV surrounding the Dirac point of graphene. In this material, we observed an anomalous band inversion (BI) protected by the symmetry with character $e$ of group C$_{\rm 3V}$. The symmetry constrains two $e$ bands with mirror-symmetry combination (MSC) and mirror-antisymmetry combination (MAC) of Au and N orbitals degenerate at $Γ$, whereas the interaction of $π^*$ of graphene on the $e$-MAC band tends to lift this degenerate, resulting in that the $π^*$ and $e$-MAC band exchange their orbital components near $Γ$, causing thus a discontinued BI.
description: 13 pages, 4 figures
Materials
Creators: name: Hawkins, Lauren
Publisher: name: Open Science Framework
Year: 2022

description: The primary material in the experiment was a set of 25 basic arithmetic questions (see Appendix A). A specific set of instructions was given to participants based on the condition in which they were placed (see Appendix B). Participants were also asked to complete a series of demographic questions (see Appendix C). A five-year-old French Bulldog was used for the condition in which participants completed the activity in the presence of a dog (see Appendix D). Finally, when the experiment was completed, participants were read a debriefing script (Appendix E).
MS Gr. class. c. 3 538
Creators: name: Oxyrhynchus Papyri
Publisher: name: University of Oxford
Year: 2023
Subjects: classificationCode: 470316
subject: Latin and classical Greek languages

description: P.Herc. 1008 col. 13. Philodemus, De vitiis 10
Drawing by Gennaro Casanova
How does Cognitive Ability impact the use of Query Reformulation Moves?
Creators: name: Moore, Erin
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2015
Subjects: Query reformulation
Information retrieval
Search Strategies

description: People have different mental strengths and weakness, which can be measured according to cognitive ability. Learning about strengths and preferences in terms of search behavior, and looking for patterns between behaviors and cognitive abilities, creates the opportunity to make search tools and systems more effectively meet user needs and preferences. While we know that different cognitive abilities exist, and that people form and reform search queries in a variety of ways, we do not know how these two elements interact, or if the interaction is predictable or significant. This paper performs secondary analysis of data collected during a study of cognitive ability, adding in the element of query reformulation moves. It assesses the effect of these cognitive abilities on study participants' search formulation behaviors. Analysis showed that the most common search move was adding a concept to a query, followed by deleting concepts and manipulating search terms. Of the cognitive abilities, the only statistically significant differences between high and low groups were found in the visualization ability. Those in the high skill group made significantly more moves, and significantly more term manipulation moves, than their low skill counterparts.
T-count optimization and Reed-Muller codes
Creators: name: Amy, Matthew
name: Mosca, Michele
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In this paper, we study the close relationship between Reed-Muller codes and single-qubit phase gates from the perspective of $T$-count optimization. We prove that minimizing the number of $T$ gates in an $n$-qubit quantum circuit over CNOT and $T$, together with the Clifford group powers of $T$, corresponds to finding a minimum distance decoding of a length $2^n-1$ binary vector in the order $n-4$ punctured Reed-Muller code. Moreover, we show that the problems are polynomially equivalent in the length of the code. As a consequence, we derive an algorithm for the optimization of $T$-count in quantum circuits based on Reed-Muller decoders, along with a new upper bound of $O(n^2)$ on the number of $T$ gates required to implement an $n$-qubit unitary over CNOT and $T$ gates. We further generalize this result to show that minimizing small angle rotations corresponds to decoding lower order binary Reed-Muller codes. In particular, we show that minimizing the number of $R_Z(2π/d)$ gates for any integer $d$ is equivalent to minimum distance decoding in $\mathcal{RM}(n - k - 1, n)^*$, where $k$ is the highest power of $2$ dividing $d$.
description: 19 pages. Version 2 gives a substantially different presentation of the results, as well as a generalization to rotation angles of any finite order
Facilitating Retrieval of Sound Recordings for Use By Professionals Treating Children with Asperger's Syndrome
Creators: name: Belvin, Dena L.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2007
Subjects: Asperger's syndrome
Music therapy
Cataloging
Digital libraries
Indexing
Content-based music retrieval
Music libraries

description: Since the 1970s, music librarians have been discussing the challenges of cataloging music media. In the 1990s, they began work on a Music Thesaurus to provide a multi-faceted approach to indexing, cataloging, and retrieving music media. In 1999 Indiana University proposed a digital music library, to allow for better indexing and retrieval in addition to content-based music retrieval. In 2000, a commercial venture, The Music Genome Project©, began cataloging sound recordings of popular music by hundreds of musical characteristics and has created a user interface that allows listeners to enter the title and artist of a certain piece of music and receive recommendations for similar music to then purchase via Pandora.com. The following paper will address the question: how might current analyzing and classifying methods be used to provide additional indexing that facilitates retrieval and use of sound recordings by special populations, specifically professionals treating children with Asperger's syndrome?
MS Gr. class. c. 3 539
Creators: name: Oxyrhynchus Papyri
Publisher: name: University of Oxford
Year: 2023
Subjects: classificationCode: 470316
subject: Latin and classical Greek languages

description: P.Herc. 1008 col. 12. Philodemus, De vitiis 10
Drawing by Gennaro Casanova
MS Gr. class. c. 3 540
Creators: name: Oxyrhynchus Papyri
Publisher: name: University of Oxford
Year: 2023
Subjects: classificationCode: 470316
subject: Latin and classical Greek languages

description: P.Herc. 1008 col. 11. Philodemus, De vitiis 10
Drawing by Gennaro Casanova
Direct Evolutionary Optimization of Variational Autoencoders With Binary Latents
Creators: name: Guiraud, Enrico
name: Drefs, Jakob
name: Lücke, Jörg
Publisher: name: arXiv
Year: 2020
Subjects: subject: Machine Learning (stat.ML)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences
subject: G.3.0; I.2.6; I.4.0; I.5.1
subject: 65C20, 68T07

description: Discrete latent variables are considered important for real world data, which has motivated research on Variational Autoencoders (VAEs) with discrete latents. However, standard VAE training is not possible in this case, which has motivated different strategies to manipulate discrete distributions in order to train discrete VAEs similarly to conventional ones. Here we ask if it is also possible to keep the discrete nature of the latents fully intact by applying a direct discrete optimization for the encoding model. The approach is consequently strongly diverting from standard VAE-training by sidestepping sampling approximation, reparameterization trick and amortization. Discrete optimization is realized in a variational setting using truncated posteriors in conjunction with evolutionary algorithms. For VAEs with binary latents, we (A) show how such a discrete variational method ties into gradient ascent for network weights, and (B) how the decoder is used to select latent states for training. Conventional amortized training is more efficient and applicable to large neural networks. However, using smaller networks, we here find direct discrete optimization to be efficiently scalable to hundreds of latents. More importantly, we find the effectiveness of direct optimization to be highly competitive in `zero-shot' learning. In contrast to large supervised networks, the here investigated VAEs can, e.g., denoise a single image without previous training on clean data and/or training on large image datasets. More generally, the studied approach shows that training of VAEs is indeed possible without sampling-based approximation and reparameterization, which may be interesting for the analysis of VAE-training in general. For `zero-shot' settings a direct optimization, furthermore, makes VAEs competitive where they have previously been outperformed by non-generative approaches.
The effect of industry-created metadata on recall in the Legacy Tobacco Documents Collection
Creators: name: Kingston, Sally A.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2010
Subjects: Indexing Automatic Indexing
Metadata
Information retrieval--Evaluation

description: This study examines the effect of including industry-created metadata with full-text in an automatically generated index for information retrieval using the IIT CDIP document collection, based on the Legacy Tobacco Documents Library. The study was conducted to determine whether including metadata for all or a portion of the documents would improve recall.  No significant variation in recall was seen between indexes created with full text, full text and metadata, or full text and partial metadata. The index created with only metadata and no full text performed significantly worse. The supports the use of OCR to obtain the full text of the documents. These results do not support the inclusion of metadata in search tools for this collection.
The black hole spin influence on accretion disk neutrino detection
Creators: name: Caballero, O. L.
name: Zielinski, T.
name: McLaughlin, G. C.
name: Surman, R.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Neutrinos are copiously emitted from black hole accretion disks playing a fundamental role in their evolution, as well as in the production of gamma ray bursts and r-process nucleosynthesis. The black hole generates a strong gravitational field able to change the properties of the emerging neutrinos. We study the influence of the black hole spin on the structure of the neutrino surfaces, neutrino luminosities, average neutrino energies, and event counts at SuperK. We consider several disk models and provide estimates that cover different black hole efficiency scenarios. We discuss the influence of the detector's inclination with respect to the axis of the torus on neutrino properties. We find that tori around spinning black holes have larger luminosities, energies and rates compared to tori around static black holes, and that the inclination of the observer causes a reduction in the luminosities and detection rates but an increase in the average energies.
description: 10 pages, 5 figures, submitted to PRD
Atomically sharp domain walls in an antiferromagnet
Creators: name: Krizek, Filip
name: Reimers, Sonka
name: Kašpar, Zdeněk
name: Marmodoro, Alberto
name: Michalička, Jan
name: Man, Ondřej
name: Edstrom, Alexander
name: Amin, Oliver J.
name: Edmonds, Kevin W.
name: Campion, Richard P.
name: Maccherozzi, Francesco
name: Dnes, Sarnjeet S.
name: Zubáč, Jan
name: Železný, Jakub
name: Výborný, Karel
name: Olejník, Kamil
name: Novák, Vít
name: Rusz, Jan
name: Idrobo, Juan C.
name: Wadley, Peter
name: Jungwirth, Tomas
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The interest in understanding scaling limits of magnetic textures such as domain walls spans the entire field of magnetism from its relativistic quantum fundamentals to applications in information technologies. The traditional focus of the field on ferromagnets has recently started to shift towards antiferromagnets which offer a rich materials landscape and utility in ultra-fast and neuromorphic devices insensitive to magnetic field perturbations. Here we report the observation that domain walls in an epitaxial crystal of antiferromagnetic CuMnAs can be atomically sharp. We reveal this ultimate domain wall scaling limit using differential phase contrast imaging within aberrationcorrected scanning transmission electron microscopy, which we complement by X-ray magnetic dichroism microscopy and ab initio calculations. We highlight that the atomically sharp domain walls are outside the remits of established spin-Hamiltonian theories and can offer device functionalities unparalleled in ferromagnets.
description: 8 pages, 4 figures, Supplementary information
MS Gr. class. c. 3 541
Creators: name: Oxyrhynchus Papyri
Publisher: name: University of Oxford
Year: 2023
Subjects: classificationCode: 470316
subject: Latin and classical Greek languages

description: P.Herc. 1008 col. 10. Philodemus, De vitiis 10
Drawing by Gennaro Casanova
I Want to See It: A Usability Study of Digital Content Integrated into Finding Aids
Creators: name: Jackson, Tracy M.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2011
Subjects: Archives--Evaluation
Archives--Internet resources
Use studies

description: This paper presents the findings of a usability study conducted on finding aids from the North Carolina Collection Photographic Archives at UNC-Chapel Hill. The study focused on digital content from archival collections that is made available through these finding aids using CONTENTdm; sought to explore how users accessed and understood this digital content; and followed up on several aspects of a similar usability study conducted at the Southern Historical Collection in 2009. Findings indicated that the digital content integrated into finding aids was largely intuitive but that it could be made more consistently usable; advanced users and users with archival experience found the finding aids easy to use; novice users may need additional assistance to understand the finding aid and would prefer to access digital content through the CONTENTdm interface; and the search capabilities in CONTENTdm are very important to users but could be improved for usability.
Hologram of a Single Photon
Creators: name: Chrapkiewicz, Radosław
name: Jachura, Michał
name: Banaszek, Konrad
name: Wasilewski, Wojciech
Publisher: name: arXiv
Year: 2015
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The spatial structure of single photons is becoming an extensively explored resource used for facilitating the free-space quantum key distribution and quantum computation as well as for benchmarking the limits of quantum entanglement generation with orbital angular momentum modes or reduction of the photon free-space propagation speed. Albeit nowadays an accurate tailoring of photon's spatial structure is routinely performed using methods employed for shaping classical optical beams, the reciprocal problem of retrieving the spatial phase-amplitude structure of an unknown single photon cannot be solved using complimentary classical holography techniques exhibiting excellent interferometric precision. Here we introduce a method to record a hologram of a single photon (HSP) probed by another reference photon, based on essentially different concept of quantum interference between two-photon probability amplitudes. Similarly to classical holograms, HSP encodes full information about photon's "shape", i.e. its quantum wavefunction whose local amplitude and phase are retrieved in the demonstrated experiment.
Improving Recovery for Libraries That Have Been Hit by Disaster
Creators: name: Peterson, Mark E.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2008
Subjects: International cooperation
Disasters
Gifts, contributions, etc.
Planning, Library

description: This study analyzes research into cases where various types of libraries around the world  were hit by disaster and were then able to restore services to their patrons, in order to  determine the effect of appeals to outside agencies for help on the amount of funding  obtained and the time that it took to restore library services.  Of the sixty cases examined, thirty-six had full records that could be examined tracking  the fate of library services from catastrophe to recovery. This research shows that all  libraries need to consider methods for handling outside help and donations in their  disaster planning. Appeals to outside interest groups and international library agencies in  brought in additional funds and appear to have shortened the time to the full recovery of  services, even for libraries with considerable insurance coverage. Only in cases of  wartime destruction is outside help essential for the survival of libraries.
On the Benefits of Edge Caching for MIMO Interference Alignment
Creators: name: Deghel, Matha
name: Baştuğ, Ejder
name: Assaad, Mohamad
name: Debbah, Merouane
Publisher: name: arXiv
Year: 2015
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: In this contribution, we jointly investigate the benefits of caching and interference alignment (IA) in multiple-input multiple-output (MIMO) interference channel under limited backhaul capacity. In particular, total average transmission rate is derived as a function of various system parameters such as backhaul link capacity, cache size, number of active transmitter-receiver pairs as well as the quantization bits for channel state information (CSI). Given the fact that base stations are equipped both with caching and IA capabilities and have knowledge of content popularity profile, we then characterize an operational regime where the caching is beneficial. Subsequently, we find the optimal number of transmitter-receiver pairs that maximizes the total average transmission rate. When the popularity profile of requested contents falls into the operational regime, it turns out that caching substantially improves the throughput as it mitigates the backhaul usage and allows IA methods to take benefit of such limited backhaul.
description: 20 pages, 5 figures. A shorter version is to be presented at 16th IEEE International Workshop on Signal Processing Advances in Wireless Communications (SPAWC'2015), Stockholm, Sweden
MS Gr. class. c. 3 542
Creators: name: Oxyrhynchus Papyri
Publisher: name: University of Oxford
Year: 2023
Subjects: classificationCode: 470316
subject: Latin and classical Greek languages

description: P.Herc. 1008 col. 9. Philodemus, De vitiis 10
Drawing by Gennaro Casanova
Themes found in young adult literature: a comparative study between 1980 and 2000
Creators: name: Wells, April Dawn
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2003
Subjects: Adolescent Literature
Adolescent Development

description: This is a comparative study of the themes related to adolescence found in twelve young adult books. Six award-winning authors were selected who have written books around 1980 and again around 2000. The study looks at the way themes such as friendship, divorce, and race are depicted in young adult books and analyzes whether those depictions have changed over the twenty-year period. The trends found in newer books are towards characters being more developed, the truth about society being told more, and the idea that some things stay the same. These trends acknowledge the sophistication of today's young adults and that they can handle the truth.
Approximations for adapted M-solutions of Type-II backward stochastic Volterra integral equations
Creators: name: Hamaguchi, Yushi
name: Taguchi, Dai
Publisher: name: arXiv
Year: 2021
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 60H20, 65C30, 60H07

description: In this paper, we study a class of Type-II backward stochastic Volterra integral equations (BSVIEs). For the adapted M-solutions, we obtain two approximation results, namely, a BSDE approximation and a numerical approximation. The BSDE approximation means that the solution of a finite system of backward stochastic differential equations (BSDEs) converges to the adapted M-solution of the original equation. As a consequence of the BSDE approximation, we obtain an estimate for the $L^2$-time regularity of the adapted M-solutions of Type-II BSVIEs. For the numerical approximation, we provide a backward Euler--Maruyama scheme, and show that the scheme converges in the strong $L^2$-sense with the convergence speed of order $1/2$. These results hold true without any differentiability conditions for the coefficients.
description: 54 pages
The preservation re-recording of audio materials in sound archives
Creators: name: Jones, Jeremy
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 1999
Subjects: Sound--Recording and Reproducing
Sound--Recording and Reproducing--Equipment and Supplies
Recorded Sound Archives--Conservation and Restoration

description: The purpose of this study was to survey preservation re-recording practices in sound archives and to compare them to the professional literature generated on the subject. This research paper describes interviews conducted with sound archivists to determine the practice of preservation re-recording of audio materials at their respective institutions. Each of the institutions visited carry out some form of preservation re-recording. All of the institutions, however, exhibited large gaps between accepted practice and their own practice. Examples of the gaps were a lack of professional staff familiar with re-recording procedures, insufficient institutional support for re-recording programs, and a shortage of high quality studio equipment.
Quasinormal modes of Four Dimensional Topological Nonlinear Charged Lifshitz Black Holes
Creators: name: Becar, Ramon
name: Gonzalez, P. A.
name: Vasquez, Yerko
Publisher: name: arXiv
Year: 2015
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We study scalar perturbations of four dimensional topological nonlinear charged Lifshitz black holes with spherical and plane transverse sections, and we find numerically the quasinormal modes for scalar fields. Then, we study the stability of these black holes under massive and massless scalar field perturbations. We focus our study on the dependence of the dynamical exponent, the nonlinear exponent, the angular momentum and the mass of the scalar field in the modes. It is found that the modes are overdamped depending strongly on the dynamical exponent and the angular momentum of the scalar field for a spherical transverse section. In constrast, for plane transverse sections the modes are always overdamped.
description: 13 pages, 2 figures and 6 Tables. arXiv admin note: text overlap with arXiv:1404.3172, arXiv:1510.04605
Born-digital architectural records: defining the archivable record
Creators: name: Barrett, Anne R.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2012
Subjects: Electronic archives
Digital preservation
Architecture archives

description: Architectural records have always presented unique challenges to archivists, being much larger, both in size and volume, and having different organizational needs than most manuscript materials. Born-digital (Computer-Aided Design or CAD) architectural records are particularly complex, being one of the most difficult types of electronic records to manage. Appraisal of these records has proved challenging, because few archives possess staff with expertise in reading architectural records or the technical expertise to deal with CAD file formats. A larger problem persists, in that no single record type or format has been defined as the archivable record. Is it possible to define the archivable architectural record in a collaborative, holistic way?   Institutions that collect these materials face challenges in determining those records of enduring value, arranging and describing those records, and providing long-term access to them. This paper proposes a collaborative approach in defining the archivable architectural record, using primary source interview data to explore which records are the most meaningful to archive. Once archivable records are identified, best practices and guidelines can be developed to ensure the longevity of those records.
Graphs via Ink: Understanding How the Amount of Non-data Ink in a Graph Affects Perception and Learning
Creators: name: Kulla-Mader, Julia
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2007
Subjects: Graph perception
Graph design
Data-ink ratio
Eye tracking

description: There is much debate in the design community concerning how to make an easy-to-understand graph. While expert designers recommend including as little non-data ink as possible, there is little empirical evidence to support their arguments. Non-data ink refers to any ink on a graph that is not required to display the graph's data. As a result of the lack of strong evidence concerning how to design graphs, there is widespread confusion when it comes to best practices. This paper describes a preliminary study of graph perception and learning using an eye-tracking system at UNC's School of Information and Library Science.
MS Gr. class. c. 3 543
Creators: name: Oxyrhynchus Papyri
Publisher: name: University of Oxford
Year: 2023
Subjects: classificationCode: 470316
subject: Latin and classical Greek languages

description: P.Herc. 1008 col. 8. Philodemus, De vitiis 10
Drawing by Gennaro Casanova
Ferula ceratophylla Regel & Schmalhausen
Creators: name: Kljuykov, Eugene
name: Lyskov, Dmitry
name: Ukrainskaja, Uliana
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Apiales
Apiaceae
Ferula
Ferula ceratophylla

description: Ferula ceratophylla Regel & Schmalhausen in Regel (1878: 595).
General distribution: Central Asia (Kazakhstan and Uzbekistan).
 Note: —Specimens from the Pskem Range and the Ugam Range have intermediate features between F. ceratophylla and F. tschimganica Lipsky ex Korovin (1947: 54). Pimenov (1983) treated them as F. ceratophylla.
 Ferula eremophyla Korovin (1947: 61). = Ferula karatavica Regel & Schmalhausen in Regel (1878: 594).
General distribution: Central Asia (Kazakhstan, Kyrgyzstan, Tadzhikistan, and Uzbekistan).
description: Published as part of Kljuykov, Eugene, Lyskov, Dmitry & Ukrainskaja, Uliana, 2018, An annotated checklist of the endemic Apiaceae of Kazakhstan, pp. 237-254 in Phytotaxa 360 (3) on page 249, DOI: 10.11646/phytotaxa.360.3.4, http://zenodo.org/record/13702655
A Multigrid Preconditioner for Jacobian-free Newton-Krylov Methods
Creators: name: Kothari, Hardik
name: Kopaničáková, Alena
name: Krause, Rolf
Publisher: name: arXiv
Year: 2021
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: In this work, we propose a multigrid preconditioner for Jacobian-free Newton-Krylov (JFNK) methods. Our multigrid method does not require knowledge of the Jacobian at any level of the multigrid hierarchy. As it is common in standard multigrid methods, the proposed method also relies on three building blocks: transfer operators, smoothers, and a coarse level solver. In addition to the restriction and prolongation operator, we also use a projection operator to transfer the current Newton iterate to a coarser level. The three-level Chebyshev semi-iterative method is employed as a smoother, as it has good smoothing properties and does not require the representation of the Jacobian matrix. We replace the direct solver on the coarsest level with a matrix-free Krylov subspace method, thus giving rise to a truly Jacobian-free multigrid preconditioner. We will discuss all building blocks of our multigrid preconditioner in detail and demonstrate the robustness and the efficiency of the proposed method using several numerical examples.
MS Gr. class. c. 3 544
Creators: name: Oxyrhynchus Papyri
Publisher: name: University of Oxford
Year: 2023
Subjects: classificationCode: 470316
subject: Latin and classical Greek languages

description: P.Herc. 1008 col. 7. Philodemus, De vitiis 10
Drawing by Gennaro Casanova
A Case Study of Assertions for the Iron Age and Implications for Temporal Metadata Creation
Creators: name: Krueger, Kristi
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2013
Subjects: Metadata
Authority control

description: This paper presents an exploratory case study of definitions, or assertions, of the Iron Age and its subdivisions consisting of name, date range, location, and source within two broadly defined geographic regions.  The collected assertions represent a period label-the Iron Age-that would appear in an authoritative database of time periods that does not require a controlled vocabulary.  Assertions were gathered from archaeological literature and related sources.  Results showed that date ranges for the Iron Age varied both by region and scholar.  Subdivisions within the Iron Age are also named differently depending on the geographic area.  Consolidating definitions for an authority file would cause loss of information.  This study is intended to address the role of authority files in temporal metadata in order to contribute generally to an understanding of appropriate metadata.
On the jumping phenomenon of $\dim_{\mathbb{C}}H^q(\mathcal{X}_t,\mathcal{E}_t)$
Creators: name: Chan, Kwokwai
name: Suen, Yat-Hin
Publisher: name: arXiv
Year: 2016
Subjects: subject: Differential Geometry (math.DG)
subject: Algebraic Geometry (math.AG)
subject: Complex Variables (math.CV)
subject: FOS: Mathematics

description: Let $X$ be a compact complex manifold and $E$ be a holomorphic vector bundle on $X$. Given a deformation $(\mathcal{X},\mathcal{E})$ of the pair $(X,E)$ over a small polydisk $B$ centered at the origin, we study the jumping phenomenon of the cohomology groups $\dim_{\mathbb{C}}H^q(\mathcal{X}_t,\mathcal{E}_t)$ near $t = 0$. Generalizing previous results of X. Ye for the tangent bundle $E = T_{\mathcal{X}_t}$ and exterior powers of the cotangent bundle $E = Ω^p_{\mathcal{X}_t}$, we show that there are precisely two cohomological obstructions to the stability of $\dim_{\mathbb{C}}H^q(\mathcal{X}_t,\mathcal{E}_t)$, which can be expressed explicitly in terms of the Maurer-Cartan element associated to the deformation $(\mathcal{X},\mathcal{E})$. As an application, we study the jumping phenomenon of the dimension of the cohomology group $H^1(\mathcal{X}_t,\text{End}(T_{\mathcal{X}_t}))$ which is related to a question raised by physicists.
description: 21 pages; v3: minor modifications, to appear in Asian J. Math
The Design, Implementation, and Evaluation of the Multimedia Story Builder and Multimedia Story Player Content Management and Delivery Systems
Creators: name: Jackson, Thomas C.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2006
Subjects: Human-computer interaction
Multimedia Presentation and Delivery
Web Interface Design
User interface design
Multimedia Content Management

description: This paper documents the planning, design, implementation, and preliminary evaluation of the Multimedia Story Builder and Multimedia Story Player--two applications that together are used to create, edit, manage, and deliver web-based multimedia presentations. These applications incorporate simple and intuitive interfaces, extensive functionality, multiple presentation methods, and support for multiple media types, all of which represent improvements over similar systems. The results of a preliminary usability test and suggestions for future testing and development are also described.
MS Gr. class. c. 3 545
Creators: name: Oxyrhynchus Papyri
Publisher: name: University of Oxford
Year: 2023
Subjects: classificationCode: 470316
subject: Latin and classical Greek languages

description: P.Herc. 1008 col. 6. Philodemus, De vitiis 10
Drawing by Gennaro Casanova
Learning in Middle School Library Makerspaces: A Makerspace Collaboration Guide for School Librarians
Creators: name: Parks, Jennifer
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2016
Subjects: Librarian-Teacher cooperation
Library media specialists
School library makerspaces

description: This paper establishes an argument for the beneficial roles makerspaces can provide in school library programs. It builds a bridge between formal and informal education by grounding it in current accepted educational theories and frameworks including constructivism, constructionism, inquiry-based learning, and Backward Design. The paper stresses the importance of understanding adolescents and how they learn in a school library makerspace. It also addresses the role of school librarians as collaborators and their responsibility to conduct evidence-based practice. The final product resulting from this work is a makerspace collaboration guide intended for use by school librarians. It provides tools for facilitating productive collaborations between the school librarian, teachers, students, and community members. A version of this collaboration guide is available for download and modification at jennythelibrarian.wordpress.com.
Two dimensional Quantum droplets in random repulsive potential
Creators: name: Sahu, Saswata
name: Majumder, Dwipesh
Publisher: name: arXiv
Year: 2021
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We have studied the effect of time-independent repulsive random impurity potential on the quantum droplets of Bose-Einstein condensation of two different species of Bose atoms in two dimensions. We have solved the Gross-Pitaevskii equation to get the density profile and the energy of the condensate. In our study, we found that quantum droplets are incredibly robust against the non-chemical reactive impurity.
Observation of an orbital interaction-induced Feshbach resonance in 173-Yb
Creators: name: Höfer, M.
name: Riegger, L.
name: Scazza, F.
name: Hofrichter, C.
name: Fernandes, D. R.
name: Parish, M. M.
name: Levinsen, J.
name: Bloch, I.
name: Fölling, S.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We report on the experimental observation of a novel inter-orbital Feshbach resonance in ultracold 173-Yb atoms, which opens the possibility of tuning the interactions between the 1S0 and 3P0 metastable state, both possessing vanishing total electronic angular momentum. The resonance is observed at experimentally accessible magnetic field strengths and occurs universally for all hyperfine state combinations. We characterize the resonance in the bulk via inter-orbital cross-thermalization as well as in a three-dimensional lattice using high-resolution clock-line spectroscopy.
description: 5 pages, 4 figures
Bridging the Digital Divide: A Case Study of the Situation in India
Creators: name: Sundaram, Anita
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2003
Subjects: India's technology development Poverty in India
Digital divide
Bridging the Divide
Globalization and technology in India

description: In the 21st century, the pace of globalization and the growth of new information  technologies, such as the Internet, are fueling both economic prosperity and human  advancement. The potential for social and economic inequality due to lack of access is an  issue of growing concern. The issue becomes even more pressing when we look at the  implications for large, developing countries such as India. While many are living in a  period of tremendous prosperity, innovation, and growth, the disparity between wealth  and poverty has never been greater. In this paper an attempt is made to look at the  different approaches being adopted to bridge the digital divide in India.
Instruction in Disability Services and Adaptive Technology in Schools of Library and Information Science: A Survey of the Curriculum
Creators: name: Carlos, Deborah J.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2005
Subjects: Libraries and people with disabilities
Curricula
Teaching.
Library education
United States
Libraries and adaptive technology

description: This paper examines the curricula of a sample of American library and information  science programs to determine the type and extent of instruction they offer in disability-related  services and adaptive technology. The course catalogs and syllabi of nine library  schools were examined for courses, lesson units, or required readings on adaptive  technology or disability services. The results of the survey indicate that instruction in  disability-related issues is not yet standard in library schools, despite the growing number  of people with disabilities who use library services and increasing concern among  practicing librarians about providing disability services.
Fidelity Bounds for Device-Independent Advantage Distillation
Creators: name: Hahn, Thomas A.
name: Tan, Ernest Y. -Z.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: It is known that advantage distillation (that is, information reconciliation using two-way communication) improves noise tolerances for quantum key distribution (QKD) setups. Two-way communication is hence also of interest in the device-independent case, where noise tolerance bounds for one-way error correction are currently too low to be experimentally feasible. Existing security proofs for the device-independent repetition-code protocol (the most prominent form of advantage distillation) rely on fidelity-related security conditions, but previous bounds on the fidelity were not tight. We improve on those results by developing an algorithm that returns arbitrarily tight lower bounds on the fidelity. Our results give new insight on how strong the fidelity-related security conditions are, and could also be used to compute some lower bounds on one-way protocol keyrates. Finally, we conjecture a necessary security condition for the protocol studied in this work, that naturally complements the existing sufficient conditions.
description: 15 pages, 3 figures. Includes changes made for publication
Internet Resources on Chinese Studies in East Asian Libraries of US: An Analysis of Links, Content and Organization
Creators: name: Chen, Xi
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2006
Subjects: Chinese Studies--Internet Resources
Internet--College and University Libraries Websites--Evaluation
East Asian Libraries

description: This paper aims to explore the current status of Internet Resources on Chinese studies among East Asian Libraries in the US. The author examined Internet Resources on Chinese Studies at the websites of 35 libraries by collecting data on the number of unique links, the kinds of websites included, the arrangement and classification of resources, the content and commonalities of the most frequently cited websites. Lists of link popularity are also compiled to illustrate the current status of Internet Resources on Chinese Studies. Finally, a number of recommendations are proposed for further research.
Policy Domains: A State-Machine Based Approach to Policy-Based Data Management
Creators: name: Conway, Michael
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2017
Subjects: Archives--Collection management
Data curation
Digital preservation
Information Resources Management Software

description: A Policy Domain is a concept introduced by Ward, Xu, Conway, et al. It describes abridge between the low-level model of a Policy Enforcement Point in iRODS and a high-level representation of an event where policies may be applied.  This proposal describes a project to concretely define and implement a policy domain as applied to a portion of the OAIS Reference Model, showing the properties of a policy domain, and pointing towards a general mechanism for creating well defined policy sets, metadata, and constraints appropriate for a domain. This provides a flexible and powerful enhancement to the successful policy management approach of iRODS, and points to new methods of composing policy-managed systems.
The Reality of Providing Professional Development in the Work Responsibilities of School Librarians
Creators: name: Stroud, Jeanne
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2016
Subjects: Surveys--School libraries
Professional Development

description: This study describes a survey given to school librarians regarding their provision of professional development opportunities for teachers. Librarians who are members of AASL Forum and LM_NET were emailed the survey. The purpose of this study was to investigate the time allocated and/or spent by school librarians on staff development related activities and to identify the variables within the school community which inhibit or contribute to those activities.
School Librarians' professional development activities were assessed using the AASL's Empowering Learners: Guidelines for School Library Programs. The survey results of 230 participants showed that librarians provide large group PD about 0.57 times per month and one-on-one PD about 5.3 times per month; however, most librarians would ideally provide more PD opportunities than they currently provide. Responses also showed that the most common factors contributing to and inhibiting the provision of PD were teacher cooperation and lack of time, respectively.
Transient dynamics of pulse-coupled oscillators with nonlinear charging curves
Creators: name: O'Keeffe, Kevin P.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: FOS: Physical sciences

description: We consider the transient behavior of globally coupled systems of identical pulse coupled oscillators. Synchrony develops through an aggregation phenomenon, with clusters of synchronized oscillators forming and growing larger in time. Previous work derived expressions for these time dependent clusters, when each oscillator obeyed a linear charging curve. We generalize these results to cases where the charging curves have nonlinearities
MS Gr. class. c. 3 546
Creators: name: Oxyrhynchus Papyri
Publisher: name: University of Oxford
Year: 2023
Subjects: classificationCode: 470316
subject: Latin and classical Greek languages

description: P.Herc. 1008 col. 5. Philodemus, De vitiis 10
Drawing by Gennaro Casanova
Publication Behaviors of the Signers of the Public Library of Science(PLoS) "Open Letter to Scientific Publishers
Creators: name: Hughes, Annie M.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2008
Subjects: Open access publishing
Electronic publishing
Publishers and publishing
Scholarly communication

description: The purpose of this work is to determine publishing behaviors of academic scientists who signed the PLoS (Public Library of Science) "Open Letter to Scientific Publishers". From the original 3,741 signers in the United States on the PLoS list, a random stratified sample of both medical and biological academic scientists who are either Assistant, Associate or Full professors was selected. After selecting the sample, names were entered into Google and Google Scholar to compile full lists of authors' publications, mainly by collecting publication lists provided on curriculum vitae. Following the collection of publication lists, journal names were resolved and coded as open access or non-open access by using Sherpa RoMEO and DOAJ (Directory of Open Access Journals). Publication behaviors were tracked from 2001--2007 in order to discover any trends. Results show that trends were similar for both medical and biological disciplines, and overall, professors adhered to the "Open Letter" pledge.
"一带一路"倡议下中国与中东国家互动的演变
Creators: name: Chen, Junhua
name: Yang, Xiaolu
name: Wang, Meijun
name: Su, Min
Publisher: name: figshare
Year: 2023
Subjects: classificationCode: 440699
subject: Human geography not elsewhere classified

description: 中东在全球政治、经济和军事事务中具有重要的战略地位，是通过陆路和海路推进"一带一路"倡议的关键枢纽。自"一带一路"倡议提出以来，中国与中东国家的合作稳步深化。因此，审视过去十年中国与中东国家互动的演变，对未来的发展具有重要意义。本研究利用GDELT数据库构建了衡量事件影响和双边关系强度的公式。它分析了中国与中东国家互动的时间发展和空间模式，同时也考察了互惠原则下中国与中东各国互动关系的类型。调查结果表明，中国与中东国家之间的整体互动保持稳定。合作关系已经从"单一合作"方式转变为涉及伊朗和沙特阿拉伯的"双重合作"模式。此外，发展轨迹已从不平衡的"北高南低"格局转向平衡模式，导致冲突关系普遍下降，国家间差距缩小。国家间普遍的互动类型的特点是平衡。
The Location of the Citation: Practice vs. Recommendations in Data Citation
Creators: name: Mayo, Christine
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2014
Subjects: Citation of electronic information resources
Digital libraries--Evaluation

description: Over the last decade, citation of archived scientific data have been the focus of intense debate. However, much of the work on data citation has centered around proposing specific formats for references. In the meantime, scientists have been creating and citing archived data sets, and we thus far lack a deep body of evidence to map the emerging best practices onto actual usage of data references.
This study sketches out some of those connections by examining references to data from the Dryad Digital Repository as appearing in articles collected in PMC Europe. I collected examples of references that appear in works cited lists and intratextually, and analyzed the occurrence of references over time, both by themselves and in conjunction with several other factors. This paper offers preliminary insights into current data citation practices, which hopefully can be used to help inform the discussion surrounding data citation.