cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Cluster di Calcolo di OAS-Bologna e Software Scientifico disponibile
Creators: name: GIANOTTI, Fulvio
name: TACCHINI, ALESSANDRO
name: DE ROSA, Adriano Giuseppe
name: PAOLETTI, DANIELA
name: TORRESI, ELEONORA
name: BULGARELLI, ANDREA
name: CONFORTI, Vito
name: DADINA, MAURO
name: DE CESARE, GIOVANNI
name: FINELLI, FABIO
name: FIORETTI, Valentina
name: FRANCESCHI, ENRICO
name: GRANDI, PAOLA
name: PASTORE, Valerio
Publisher: name: OAS Bologna
Year: 2023

description: All’interno dell’ Osservatorio di Astrofisica e Scienza dello Spazio di Bologna (OAS), da sempre abbiamo avuto la necessità di strumenti di calcolo potenti e condivisi su cui gli scienziati possano svolgere le elaborazioni sui dati scientifici di Progetti e Missioni. Il Cluster OAS nasce proprio per soddisfare questa esigenza ed è ospitato nel Centro di Calcolo del plesso OAS presso il CNR di Bologna. Tutti gli afferenti a OAS possono chiedere di essere registrati nel sistema di autenticazione LDAP del Cluster e in questo modo accedere via Internet ai nodi di login da dove possono sottomettere le loro elaborazioni. Ci sono due modalità di usare il cluster: quella interattiva e quella batch più classica per un Cluster. L’accesso interattivo consente di lanciare in tempo reale le elaborazioni anche in maniera grafica tramite opportuni programmi si console virtuale, questo tipo di elaborazione viene svolta direttamente nei nodi di login. La modalità batch sfrutta il meccanismo a code, slurm, per sottomettere i lavori in maniera organizzata ai più potenti nodi di calcolo che non sono direttamente utilizzabili dagli utenti. Il cluster inoltre fornisce spazio di archiviazione condiviso organizzato in HOME per i dati personali degli utenti, DATA per i risultati delle elaborazioni PROGRAMMI per la memorizzazione dei moduli di elaborazione e LUSTRE per il calcolo parallelo. I vantaggi di avere un Cluster sono che gli utenti trovano i programmi e compilatori di cui necessitano già installati nelle principali versioni e hanno a disposizione una buona potenza di calcolo e spazio di storage per poter lavorare molto più agevolmente rispetto ai propri computer personali. Il Cluster OAS non ha una potenza paragonabile ai grandi Cluster Commerciali e di Ricerca, ma essendo ritagliato sulle esigenze degli afferenti a OAS risponde bene alle esigenze dell'istituto e può servire come Nave Scuola per poter poi accedere a strutture più grandi qualora fosse necessario. Nel documento saranno illustrate nel dettaglio le caratteristiche Hardware e Software del Cluster, compresi tutti i principali Software scientifici installati di cui si spiega brevemente l’utilizzo.
A Survey of Orange County Public Library Computer Users
Creators: name: Brzozowski, Bonnie S.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2007
Subjects: Digital divide
Public libraries--North Carolina
Information retrieval--Social aspects
Microcomputers--Patron use
Use studies--Internet
Internet--Public libraries

description: This study presents the results of a paper-based survey conducted at all four branches of the Orange County Public Library System (OCPLS) in North Carolina. The goal of the study was to gauge the adequacy in which OCPLS is bridging the digital divide, defined as gaps in technological access among the American public, as well as offer OCPLS an opportunity to gather feedback on existing policies and services. The collection of this data could have provided OCPLS with justification for its continued funding; however, the response rate was low and it is still unclear whether or not OCPLS is filling technological gaps. Nonetheless, the value of this survey has been demonstrated previously, and with slight alterations to the present study a higher response rate is likely.
Turning Statistical Physics Models Into Materials Design Engines
Creators: name: Miskin, Marc Z.
name: Khaira, Gurdaman S.
name: de Pablo, Juan J.
name: Jaeger, Heinrich M.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Despite the success statistical physics has enjoyed at predicting the properties of materials for given parameters, the inverse problem, identifying which material parameters produce given, desired properties, is only beginning to be addressed. Recently, several methods have emerged across disciplines that draw upon optimization and simulation to create computer programs that tailor material responses to specified behaviors. However, so far the methods developed either involve black-box techniques, in which the optimizer operates without explicit knowledge of the material's configuration space, or they require carefully tuned algorithms with applicability limited to a narrow subclass of materials. Here we introduce a formalism that can generate optimizers automatically by extending statistical mechanics into the realm of design. The strength of this new approach lies in its capability to transform statistical models that describe materials into optimizers to tailor them. By comparing against standard black-box optimization methods, we demonstrate how optimizers generated by this formalism can be faster and more effective, while remaining straightforward to implement. The scope of our approach includes new possibilities for solving a variety of complex optimization and design problems concerning materials both in and out of equilibrium.
Bibliographie der Geschichte, Landes- und Volkskunde von Stadt und Kanton Zürich: 1. April 1969 bis 31. März 1970
Creators: name: Bühner, Carl
Publisher: name: Buchdruckerei a/d Sihl AG
Year: 1970
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 1971.
Cylindrospermopsis taverae Komarek & Komarkova-Legnerova 2002
Creators: name: Li, Xiao-Chuang
name: Huo, Shou-Liang
name: Cai, Fang-Fang
name: Yang, Yi-Ming
name: Xi, Bei-Dou
name: Li, Ren-Hui
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Bacteria
Cyanobacteria
Cyanophyceae
Nostocales
Nostocaceae
Cylindrospermopsis
Cylindrospermopsis taverae

description: Cylindrospermopsis taverae Komárek & Komárková-Legnerová (2002: 229, 228, fig. 21)
 Strains:— CHAB 143 from a small pond in Kunming City,Yun’nan Province.
 Habitat:— In lakes or ponds, planktonic.
 Description:— Trichomes solitary, free floating, more or less regularly screw-like coiled with one to two coils, cylindrical, constricted at cross walls, rarely in straight (Fig. 1A–C). Cells cylindrical to slightly barrel-shaped, rarely almost isodiametric, 5.4-8.0–13.4 μm long, 3.1–3.9–4.8 μm wide (L:W ratio 1.3–2.0–2.8), with gas vesicles, apical cells rounded at the ends. Heterocytes elongated, slightly conical, apical cells of the same width as the other cells, or slightly narrower and rounded, curved and rounded at the apex, 4.7–9.2–13.5 μm long, 3.2–4.8–6.3 μm wide (L: W ratio 1.3–2.0–3.4). Akinetes cylindrical with rounded ends, usually solitary, near the ends of trichomes, slightly distant from terminal heterocytes by 1–3 vegetative cells, 3.3–9.1–14.7 μm long, 2.8–4.3–5.4 μm wide (L:W ratio 1.1–2.1–3.1) (Table S4).
 Notes:— C. taverae differed from other Cylindrospermopsis species by its irregularly screw-like coiled trichomes, apical cells narrowed, conical, rounded at the ends, and heterocytes elongated, slightly conical, always curved and rounded at the ends.
description: Published as part of Li, Xiao-Chuang, Huo, Shou-Liang, Cai, Fang-Fang, Yang, Yi-Ming, Xi, Bei-Dou & Li, Ren-Hui, 2017, The taxonomy and phylogeny of the genus Cylindrospermopsis (Cyanobacterium) evaluated by adding five new records from China, pp. 224-238 in Phytotaxa 316 (3) on pages 227-228, DOI: 10.11646/phytotaxa.316.3.2, http://zenodo.org/record/13700027
Pixton's double ramification cycle relations
Creators: name: Clader, Emily
name: Janda, Felix
Publisher: name: arXiv
Year: 2016
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics

description: We prove a conjecture of Pixton, namely that his proposed formula for the double ramification cycle on Mbar_{g,n} vanishes in codimension beyond g. This yields a collection of tautological relations in the Chow ring of Mbar_{g,n}. We describe, furthermore, how these relations can be obtained from Pixton's 3-spin relations via localization on the moduli space of stable maps to an orbifold projective line.
description: 40 pages. v2: Correction to proof of Lemma 4.2; results of Section 4 assume that exactly one a_i is negative, and the general case is deduced by polynomiality in A. v3: Substantial changes to Section 6 and the Appendix
Cylindrospermopsis helicoidea Cronberg & Komarek 2003
Creators: name: Li, Xiao-Chuang
name: Huo, Shou-Liang
name: Cai, Fang-Fang
name: Yang, Yi-Ming
name: Xi, Bei-Dou
name: Li, Ren-Hui
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Bacteria
Cyanobacteria
Cyanophyceae
Nostocales
Nostocaceae
Cylindrospermopsis
Cylindrospermopsis helicoidea

description: Cylindrospermopsis helicoidea Cronberg & Komárek (2003: 83, 95, fig. 15)
 Strains:— CHAB 357 from Lake Wenshan in Shenzhen City, Guangdong Province.
 Habitat:— In lakes, planktonic.
 Description:— Trichomes solitary, free floating, intensely screw-like coiled, with mainly 3–6 coils, without mucilaginous envelopes (Fig. 1D–G). Cells cylindrical, not constricted at cross walls, not or slightly attenuated towards the ends, 5.3–6.7–8.9 μm long, 2.0–2.5–3.2 μm wide (L:W ratio 1.9–2.7–3.5), apical cells are rounded at the ends. Heterocytes ellipsoidal to irregularly barrel-shaped, slightly curved, narrowed and rounded at the apex, their long axis are oriented parallel with the axis of the coiled filament, 4.6–6.4–8.2 μm long, 2.6–4.1–5.7 μm wide (L:W ratio 1.2–1.6–2.3). Akinetes not found (Table S4).
 Notes:— C. helicoidea was featured with densely coiled trichomes.
description: Published as part of Li, Xiao-Chuang, Huo, Shou-Liang, Cai, Fang-Fang, Yang, Yi-Ming, Xi, Bei-Dou & Li, Ren-Hui, 2017, The taxonomy and phylogeny of the genus Cylindrospermopsis (Cyanobacterium) evaluated by adding five new records from China, pp. 224-238 in Phytotaxa 316 (3) on page 228, DOI: 10.11646/phytotaxa.316.3.2, http://zenodo.org/record/13700027
Disformal Gravity Theories: A Jordan Frame Analysis
Creators: name: Sakstein, Jeremy
name: Verner, Sarunas
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 - Theory (hep-th)
subject: FOS: Physical sciences

description: The Jordan frame action for general disformal theories is presented and studied for the first time, motivated by several unresolved mysteries that arise when working in the Einstein frame. We present the Friedmann equations and, specialising to exponential functions, study the late-time cosmology using dynamical systems methods and by finding approximate solutions. Our analysis reveals that either the disformal effects are irrelevant or the universe evolves towards a phantom phase where the equation of state of dark energy is $-3$. There is a marginal case where the asymptotic state of the universe depends on the model parameters and de-Sitter solutions can be obtained. Our findings indicate that the metric singularity found using the Einstein frame construction corresponds phantom behaviour in the Jordan frame and we argue that this is the case for general disformal theories.
description: Updated to reflect published version, results unchanged. 15 pages, 9 figures, 4 tables
Bibliographie der Geschichte, Landes- und Volkskunde von Stadt und Kanton Zürich: 1. April 1970 bis 31. März 1971
Creators: name: Bühner, Carl
Publisher: name: Buchdruckerei a/d Sihl AG
Year: 1971
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 1972.
Post-Click Conversion Rate Predictive Model on E-commerce Recommender System
Creators: name: Ding, Yuhe
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2018

description: This paper discusses about how different features influence customers’ decision on their online purchase after click behavior. The dataset is gathered from real-world traffic log of the recommender system in e-commerce. Logistic Regression and Extreme Gradient Boosting are used as main machine learning approaches for predictive analysis and modeling. In this study, features from users’ profile, shops’ profile and context are tested to see to what extent they may exert influence on customers’ purchase intention. Based on the experiment results, this paper also proposes some possible improvement for e-commerce platform in personalized recommendation in order to increase conversions and discusses about potential approaches to improve conversion rate prediction performance.
Experimental investigation of circular Bragg phenomenon exhibited by a mirror-backed chiral sculptured thin film
Creators: name: Erten, Sema
name: Swiontek, Stephen E.
name: Graham, Christian M.
name: Lakhtakia, Akhlesh
Publisher: name: arXiv
Year: 2015
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Experimentation with obliquely incident light established that all four circular reflectances of a chiral sculptured thin film backed by a metallic mirror contain strong evidence of the circular Bragg phenomenon. When the mirror is removed, strong evidence of that phenomenon is found only in the spectrum of the co-polarized and co-handed reflectance.
description: 8 pages, 4 figures
Bibliographie der Geschichte, Landes- und Volkskunde von Stadt und Kanton Zürich: 1. April 1968 bis 31. März 1969
Creators: name: Bühner, Carl
Publisher: name: Buchdruckerei a/d Sihl AG
Year: 1969
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 1970.
"Voices on the Third Floor": The Literary Society Libraries of Miami University, 1825-1873
Creators: name: Ceronie, Katelin
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2014
Subjects: Miami University (Oxford, Ohio). Erodelphian Literary Society--History
Society libraries--Ohio--Oxford--History
Miami University (Oxford, Ohio). Miami Union Literary Society--History

description: Nineteenth century American colleges and universities placed heavy restrictions on their students. Students' academic work was rigidly laid out for them, and college administrators did not feel that students required access to books outside of the textbooks they used in their courses. Thus, undergraduate students were barred from most academic libraries. The students themselves began to form literary societies in order to expand upon their college educations; these societies focused on debating and speech making, skills students did not learn in their coursework. Often the literary societies founded their own libraries, giving student members access both to texts that supplemented their collegiate learning and to modern texts for their extracurricular enjoyment. This paper looks at the history of the literary societies at Miami University, in Oxford, Ohio-the Erodelphian Literary Society and the Miami Union Literary Society-and the libraries they founded, between 1825 and 1873.
Quark deconfinement and the duration of short Gamma Ray Bursts
Creators: name: Drago, Alessandro
name: Lavagno, Andrea
name: Metzger, Brian
name: Pagliara, Giuseppe
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We propose a model for short duration gamma-ray bursts (sGRBs) based on the formation of a quark star after the merger of two neutron stars. We assume that the sGRB central engine is a proto-magnetar, which has been previously invoked to explain the plateau-like X-ray emission observed following both long and short GRBs. Here, we show that: i) a few milliseconds after the merger it is possible to form a stable and massive star made in part of quarks; ii) during the early cooling phase of the incompletely formed quark star, the flux of baryons ablated from the surface by neutrinos is large and it does not allow the outflow to achieve a bulk Lorentz factor high enough to produce a GRB; iii) after the quark burning front reaches the stellar surface, baryon ablation ceases and the jet becomes too baryon poor to produce a GRB; iv) however, between these two phases a GRB can be produced over the finite timescale required for the baryon pollution to cease; a characteristic timescale of the order of $\sim 0.1 $ s naturally results from the time the conversion front needs to cover the distance between the rotational pole and the latitude of the last closed magnetic field line; v) we predict a correlation between the luminosity of the sGRB and its duration, consistent with the data; vi) our model also predicts a delay of the order of ten seconds between the time of the merger event and the sGRB, allowing for the possibility of precursor emission and implying that the jet will encounter the dense cocoon formed immediately after the merger.
description: 4 pages, 3 figures
Low volume-fraction microstructures in martensites and crystal plasticity
Creators: name: Conti, Sergio
name: Zwicknagl, Barbara
Publisher: name: arXiv
Year: 2015
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: We study microstructure formation in two nonconvex singularly-perturbed variational problems from materials science, one modeling austenite-martensite interfaces in shape-memory alloys, the other one slip structures in the plastic deformation of crystals. For both functionals we determine the scaling of the optimal energy in terms of the parameters of the problem, leading to a characterization of the mesoscopic phase diagram. Our results identify the presence of a new phase, which is intermediate between the classical laminar microstructures and branching patterns. The new phase, characterized by partial branching, appears for both problems in the limit of small volume fraction, that is, if one of the variants (or of the slip systems) dominates the picture and the volume fraction of the other one is small.
Limits on sterile neutrino contributions to neutrinoless double beta decay
Creators: name: Barea, J.
name: Kotila, J.
name: Iachello, F.
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Nuclear matrix elements (NME) for exchange of arbitrary mass neutrinos are calculated in the interacting boson model (IBM-2). By combining the NME with the phase space factors (PSF), expected half-lives for neutrinos of mass $m_N$ and coupling $U_{eN}$ are estimated. Limits on sterile neutrinos with masses in the eV, keV, MeV-GeV, and TeV range are given.
Integral Field Spectroscopy of Massive Young Stellar Objects in the N113 H\,{\sc ii} Region in the Large Magellanic Cloud
Creators: name: Ward, J. L.
name: Oliveira, J. M.
name: van Loon, J. Th.
name: Sewilo, M.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The \textit{Spitzer} SAGE survey has allowed the identification and analysis of significant samples of Young Stellar Object (YSO) candidates in the Large Magellanic Cloud (LMC). However the angular resolution of \textit{Spitzer} is relatively poor meaning that at the distance of the LMC, it is likely that many of the \textit{Spitzer} YSO candidates in fact contain multiple components. We present high resolution \textit{K}-band integral field spectroscopic observations of the three most prominent massive YSO candidates in the N113 H\,{\sc ii} region using VLT/SINFONI. We have identified six \textit{K}-band continuum sources within the three \textit{Spitzer} sources and we have mapped the morphology and velocity fields of extended line emission around these sources. Br$γ$, He\,{\sc i} and H$_2$ emission is found at the position of all six \textit{K}-band sources; we discuss whether the emission is associated with the continuum sources or whether it is ambient emission. H$_2$ emission appears to be mostly ambient emission and no evidence of CO emission arising in the discs of YSOs has been found. We have mapped the centroid velocities of extended Br$γ$ emission and He {\sc i} emission and found evidence of two expanding compact H\,{\sc ii} regions. One source shows compact and strong H$_2$ emission suggestive of a molecular outflow. The diversity of spectroscopic properties observed is interpreted in the context of a range of evolutionary stages associated with massive star formation.
description: 20 pages, 12 figures, Accepted by MNRAS 2015 October 19
Cylindrospermopsis catemaco Komarkova-Legnerova & R. Tavera 1996
Creators: name: Li, Xiao-Chuang
name: Huo, Shou-Liang
name: Cai, Fang-Fang
name: Yang, Yi-Ming
name: Xi, Bei-Dou
name: Li, Ren-Hui
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Bacteria
Cyanobacteria
Cyanophyceae
Nostocales
Nostocaceae
Cylindrospermopsis
Cylindrospermopsis catemaco

description: Cylindrospermopsis catemaco Komárková-Legnerová & R.Tavera (1996: 413, 413, fig. 6)
 Strains:— CHAB 148, CHAB 151, CHAB 155 and CHAB 220 from a pond in Kunming City, Yunnan Province; CHAB 1390 and CHAB 1391 from Lake Chidong in Huang’gang City, Hubei Province.
 Habitat:— In lakes and ponds, planktonic.
 Description:— Trichomes solitary, free floating, irregularly screw-like coiled, not constricted at the cross-walls, narrowed and sharply pointed at both ends, (Fig. 1M–Q). Cells cylindrical, slightly attenuated towards the ends, 4.0– 8.3–15.0 μm long, 1.3–3.4–4.1 μm wide (L:W ratio 1.3–2.9–5.0), apical cells sharply pointed at the ends. Heterocytes cylindrical to ellipsoidal, bluntly pointed at the ends, sometimes curved, 2.9–7.6–10.9 μm long, 1.4–3.3–4.4 μm wide (L:W ratio 1.4–3.6–4.5). Akinetes cylindrical to ellipsoidal, rounded at the ends, usually curved, 4.9–11.6–18.9 μm long, 2.0–5.0–7.0 μm wide (L:W ratio 1.3–1.9–5.0).
 Notes:— C. catemaco was identified according to its irregularly screw-like coiled trichomes, apical cells narrowed and sharply pointed at the ends, and their heterocytes curved, drop-like, slightly narrowed to the rounded ends.
description: Published as part of Li, Xiao-Chuang, Huo, Shou-Liang, Cai, Fang-Fang, Yang, Yi-Ming, Xi, Bei-Dou & Li, Ren-Hui, 2017, The taxonomy and phylogeny of the genus Cylindrospermopsis (Cyanobacterium) evaluated by adding five new records from China, pp. 224-238 in Phytotaxa 316 (3) on page 229, DOI: 10.11646/phytotaxa.316.3.2, http://zenodo.org/record/13700027
Archival Literature: Analysis of the Evolution of American Archivist
Creators: name: Berman, Whitney Elizabeth
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2004
Subjects: Archivists--Education
Society of American Archivists History
American Archivist (Periodical)
Archivists
Society of American Archivists

description: This paper is a content analysis of the "American Archivist," the journal of the "Society of American Archivists." Eight volumes of the journal were analyzed to review the decade by decade thematic and structural evolution of the journal from its foundation in 1938 to the present. Analysis was conducted to determine if the journal had fulfilled its initial requirement "to be as useful as possible to all members of the profession."
Rectifiability of harmonic measure
Creators: name: Azzam, Jonas
name: Hofmann, Steve
name: Martell, José María
name: Mayboroda, Svitlana
name: Mourgoglou, Mihalis
name: Tolsa, Xavier
name: Volberg, Alexander
Publisher: name: arXiv
Year: 2015
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 31A15, 31B15, 30C85, 42B37, 31B05, 35J08, 42B20, 28A75, 28A78

description: In the present paper we prove that for any open connected set $Ω\subset\mathbb{R}^{n+1}$, $n\geq 1$, and any $E\subset \partial Ω$ with $\mathcal{H}^n(E)
description: arXiv admin note: text overlap with arXiv:1505.06088, arXiv:1507.04409
Finding similarity using metadata of clinical trials using Natural Language Processing in DataBridge
Creators: name: Boya, Harika
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2016
Subjects: Similarity calculation techniques
Data mining
Natural language processing

description: Information explosion in every field in this age creates one big challenge - how to extract meaningful information from massive amounts of data. Currently there are millions of datasets available as a result of research by various scientists. It is necessary to find the hidden potential of this data and identify different ways data can be related to each other. The purpose of the project is to identify the level of similarity between the metadata of any two clinical trials that have been completed in Databridge application. The dataset being considered is the entire metadata of all the concluded clinical trials as updated on clinicaltrials.gov. Only the trials which have been completed and have results updated are being considered. This paper discusses four different techniques employed for finding similarity between any two particular clinical trials and their corresponding results.
Taxonomie der Evidenzorientierung im Bildungsbereich – was, wozu, wo und wie?
Creators: name: Rochnia, Michael
name: Schellenbach-Zell, Judith
name: Steckel, Jennifer
name: Radisch, Falk
Publisher: name: PraxisForschungLehrer*innenBildung. Zeitschrift für Schul- und Professionsentwicklung.
Year: 2022

description: Die Nutzung von Evidenz ist eine Herausforderung für die Lehrkräftebildung. Studien und konzeptionelle Überlegungen zu diesem Thema zeichnen sich durch unterschiedliche Zugriffe auf Evidenz aus. Im vorliegenden Beitrag werden diese Zugriffe anhand von vier Fragen diskutiert: (1) Was ist Evidenz? (2) Wozu kann diese genutzt werden? (3) Wo ist Evidenz zu finden? (4) Wie kann Evidenz kommuniziert werden? Abschließend schlagen wir eine Taxonomie der Nutzung von Evidenz vor und diskutieren mögliche Implikationen für die Lehrkräftebildung.
description: PraxisForschungLehrer*innenBildung. Zeitschrift für Schul- und Professionsentwicklung., Bd. 4 Nr. 1 (2022): PraxisForschungLehrer*innenBildung – Ausgabe 4
Electronic Coherence Control in a Charged Quantum Dot
Creators: name: Moody, Galan
name: McDonald, Corey
name: Feldman, Ari
name: Harvey, Todd
name: Mirin, Richard P.
name: Silverman, Kevin L.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Minimizing decoherence due to coupling of a quantum system to its fluctuating environment is at the forefront of quantum information science and photonics research. Nature sets the ultimate limit, however, given by the strength of the system's coupling to the electromagnetic field. Here, we establish the ability to electronically control this coupling and $\textit{enhance}$ the coherence time of a quantum dot excitonic state. Coherence control is demonstrated on the positively charged exciton transition (an electron Coulomb-bound with two holes) in quantum dots embedded in a photonic waveguide by manipulating the electron and hole wavefunctions through an applied lateral electric field. With increasing field up to 15 kV cm$^{-1}$, the coherence time increases by a factor of two from $\sim1.4$ ns to $\sim2.7$ ns. Numerical calculations reveal that longer coherence arises from the separation of charge carriers by up to $\sim6$ nm, which leads to a $30\%$ weaker transition dipole moment. The ability to electrostatically control the coherence time and transition dipole moment opens new avenues for quantum communication and novel coupling schemes between distant qubits.
description: 12 pages, 3 figures
Conceptions of Emulation, Migration, and Related Concepts in Digital Preservation Literature
Creators: name: Swails, Mark J.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2009
Subjects: Electronic data archives--Conservation and restoration

description: This study uses conceptual content analysis to examine and compare definitions of "emulation," "migration," and other key terms in the digital preservation literature. Eight terms were coded and analyzed including "digital object," "authenticity," and "significant properties." Particular attention is paid to definitions of emulation and migration, and arguments for and against each process are reviewed.  Within the library science literature there is a significant consensus about the definitions of many of these key terms. However, there still exists some ambiguity and disagreement about how these fundamental concepts should be understood. Those undertaking digital projects must be deliberate about defining these foundational terms before they begin work.
Investigation of a High-frequency Modulated Illumination System for Time-of-Flight Imaging
Creators: name: Lokesh, Varun Kalasapura
Publisher: name: Zenodo
Year: 2022
Subjects: Time-of-Flight
Phase Delay
VCSEL (Vertical-Cavity Surface-Emitting Laser)
Fourier coefficients

description: The Time of Flight (ToF) camera can extract depth information from the scene. ToF cameras require a modulated illumination source, generally, a near-infrared (NIR) light source that is modulated with a frequency of tens to hundreds of MHz. The illumination system comprises 13 double LED modules surrounding the ZESS MultiCam. It is essential that all LED modules emit synchronously because otherwise non-homogeneity of the modulated wavefront is observed. In this work, the experimental evaluation of phase delay between the Illumination Control Signal (ICS) and the optical signal (light emitted by each LED) is evaluated using Fourier coefficients corresponding to the fundamental frequency for all the LED modules surrounding ZESS MultiCam. The modulation frequency of the light establishes a trade-off between the depth resolution and the unambiguous range. Higher frequencies provide high depth resolution but at the cost of reduced unambiguous range. In this work, a new illumination source, a VCSEL (Vertical-Cavity Surface-Emitting Laser) which could operate in frequency ranges up to one Gigahertz is selected and a suitable driving system is developed.
Quantitative Quasiperiodicity
Creators: name: Das, Suddhasattwa
name: Saiki, Yoshitaka
name: Sander, Evelyn
name: Yorke, James A
Publisher: name: arXiv
Year: 2016
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 37J35, 37A30

description: The Birkhoff Ergodic Theorem concludes that time averages, i.e., Birkhoff averages, $Σ_{n=0}^{N-1} f(x_n)/N$ of a function $f$ along a length $N$ ergodic trajectory $(x_n)$ of a function $T$ converge to the space average $\int f dμ$, where $μ$ is the unique invariant probability measure. Convergence of the time average to the space average is slow. We introduce a modified average of $f(x_n)$ by giving very small weights to the "end" terms when $n$ is near $0$ or $N-1$. When $(x_n)$ is a trajectory on a quasiperiodic torus and $f$ and $T$ are $C^\infty$, we show that our weighted Birkhoff averages converge 'super" fast to $\int f dμ$ with respect to the number of iterates $N$, i.e. with error decaying faster than $N^{-m}$ for every integer $m$. Our goal is to show that our weighted Birkhoff average is a powerful computational tool, and this paper illustrates its use for several examples where the quasiperiodic set is one or two dimensional. In particular, we compute rotation numbers and conjugacies (i.e. changes of variables) and their Fourier series, often with 30-digit accuracy.
description: arXiv admin note: substantial text overlap with arXiv:1508.00062
Materials Availability and Programming Activities for Hispanic Students: A Survey of North Carolina Elementary School Media Centers
Creators: name: Mikkelsen, Susan K.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2002
Subjects: School libraries--North Carolina
School libraries--Services to Spanish Americans
School libraries--Book selection
Multiculturalism Hispanic

description: A questionnaire survey of 86 North Carolina elementary school media centers was conducted to determine media center compliance levels to the American Library Association's Guidelines for Library Services to Hispanics. Information was gathered to determine compliance levels in the areas of Spanish language materials and access, and Spanish language programming and reading encouragement activities. Analysis of the survey data revealed that the majority of libraries studied achieved fair to moderate compliance levels in the areas of Spanish materials and access performance. The performance levels for Spanish language programming and reading encouragement activities were somewhat lower with the majority of libraries studied showing no or only fair compliance to the standards outlined by the American Library Association.
Reference-guided Pseudo-Label Generation for Medical Semantic Segmentation
Creators: name: Seibold, Constantin
name: Reiß, Simon
name: Kleesiek, Jens
name: Stiefelhagen, Rainer
Publisher: name: Association for the Advancement of Artificial Intelligence (AAAI)
Year: 2022
Subjects: semi-supervised learning
semantic segmentation

description: Producing densely annotated data is a difficult and tedious task for medical imaging applications. To address this prob- lem, we propose a novel approach to generate supervision for semi-supervised semantic segmentation. We argue that visu- ally similar regions between labeled and unlabeled images likely contain the same semantics and therefore should share their label. Following this thought, we use a small number of labeled images as reference material and match pixels in an unlabeled image to the semantics of the best fitting pixel in a reference set. This way, we avoid pitfalls such as confirma- tion bias, common in purely prediction-based pseudo-labeling. Since our method does not require any architectural changes or accompanying networks, one can easily insert it into existing frameworks. We achieve the same performance as a standard fully supervised model on X-ray anatomy segmentation, albeit 95% fewer labeled images. Aside from an in-depth analy- sis of different aspects of our proposed method, we further demonstrate the effectiveness of our reference-guided learning paradigm by comparing our approach against existing methods for retinal fluid segmentation with competitive performance as we improve upon recent work by up to 15% mean IoU.
Yelp Rating Prediction with Sentiment and Topic Models.
Creators: name: Liang, Ying
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2017
Subjects: Topic Modeling
Rating Prediction
Sentiment

description: Online reviews have been widely used for sentiment analysis tasks, for example, sentiment polarity prediction. In this paper, I address the rating prediction problem, using Yelp reviews. A star rating, in most cases, agrees with its review sentiment, which makes sentiment-words a reasonable solution for this task. Topics in reviews, on the other hand, are also likely to influence rating prediction. For example, for a restaurant, a customer may think it has a 5-stars service but the food is just 3-stars. So overall, that customer might give that restaurant a 4-stars rating. Using this idea, in this paper, I investigate whether topics, in addition to sentiment, are helpful in rating prediction task. I incorporated topic model with sentiment model and observed performance improvement.
User Experience: Portfolio Design
Creators: name: West, Robert
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2013
Subjects: Design--User experience
Design--Portfolios

description: This report describes a survey of current User Experience (UX) practitioners to establish the
value of a strong portfolio during the job application process, and to define what features create
a strong portfolio. Responses were collected via a formal survey distribution, informal
informational interviews, and a literature review of formal publications and professional blogs.
During data collection, all levels of industry were consulted, from local, national, and
international development firms.
Nearly every UX position advertised carries the note that a portfolio review is a necessary
component of candidate selection. As such, portfolio creation is a large part of professional
development and a critical component of the application process for current and future UX
designers. However, portfolio creation remains an art form, and can be difficult for
inexperienced designers to tackle without guidance and preparation.
Temperature-dependent many-body effects in Dirac-Weyl materials: Interacting compressibility and quasiparticle velocity
Creators: name: Setiawan, F.
name: Sarma, S. Das
Publisher: name: arXiv
Year: 2015
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We calculate, within the single-loop or equivalently the Hartree-Fock Approximation (HFA), the finite-temperature interacting compressibility for three-dimensional (3D) Dirac materials and renormalized quasiparticle velocities for 3D and two-dimensional (2D) Dirac materials. We find that in the extrinsic (i.e., doped) system, the inverse compressibility (incompressibility) and renormalized quasiparticle velocity at $k=0$ show nonmonotonic dependences on temperature. At low temperatures the incompressibility initially decreases to a shallow minimum with a $T^2 \ln T$ dependence. As the temperature increases further, the incompressibility rises to a maximum and beyond that it decreases with increasing temperature. On the other hand, the renormalized quasiparticle velocity at $k=0$ for both 2D and 3D Dirac materials first increases with $T^2$, rises to a maximum, and after reaching the maximum it decreases with increasing temperature. We also find that within the HFA, the leading-order temperature correction to the low-temperature renormalized extrinsic Fermi velocity for both 2D and 3D doped Dirac materials is $\ln (1/T)$.
description: 14 pages, 9 figures. Published version
A finite element method for nematic liquid crystals with variable degree of orientation
Creators: name: Nochetto, Ricardo H.
name: Walker, Shawn W.
name: Zhang, Wujun
Publisher: name: arXiv
Year: 2016
Subjects: subject: Numerical Analysis (math.NA)
subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 65N30, 49M25, 35J70

description: We consider the simplest one-constant model, put forward by J. Ericksen, for nematic liquid crystals with variable degree of orientation. The equilibrium state is described by a director field $\mathbf{n}$ and its degree of orientation $s$, where the pair $(s, \mathbf{n})$ minimizes a sum of Frank-like energies and a double well potential. In particular, the Euler-Lagrange equations for the minimizer contain a degenerate elliptic equation for $\mathbf{n}$, which allows for line and plane defects to have finite energy. We present a structure preserving discretization of the liquid crystal energy with piecewise linear finite elements that can handle the degenerate elliptic part without regularization, and show that it is consistent and stable. We prove $Γ$-convergence of discrete global minimizers to continuous ones as the mesh size goes to zero. We develop a quasi-gradient flow scheme for computing discrete equilibrium solutions and prove it has a strictly monotone energy decreasing property. We present simulations in two and three dimensions to illustrate the method's ability to handle non-trivial defects. A music video summary of the paper is available on YouTube: "Mathematical Modeling and Simulation of Nematic Liquid Crystals (A Montage)," http://www.youtube.com/watch?v=pWWw7\_6cQ-U
description: keywords: liquid crystals, finite element method, gamma-convergence, gradient flow, line defect, plane defect
Electronic Supplementary Material from Does peer review improve the statistical content of manuscripts? A study on 27 467 submissions to four journals
Creators: name: Garcia-Costa, Daniel
name: Forte, Anabel
name: Lòpez-Iñesta, Emilia
name: Squazzoni, Flaminio
name: Grimaldo, Francisco
Publisher: name: The Royal Society
Year: 2022
Subjects: subject: Statistics
subject: FOS: Mathematics
subject: Artificial Intelligence and Image Processing
subject: FOS: Computer and information sciences
subject: 179999 Psychology and Cognitive Sciences not elsewhere classified
subject: FOS: Psychology

description: Improving the methodological rigour and the quality of data analysis in manuscripts submitted to journals is key to ensure the validity of scientific claims. However, there is scant knowledge of how manuscripts change throughout the review process in academic journals. Here, we examined 27 467 manuscripts submitted to four journals from the Royal Society (2006–2017) and analysed the effect of peer review on the amount of statistical content of manuscripts, i.e. one of the most important aspects to assess the methodological rigour of manuscripts. We found that manuscripts with both initial low or high levels of statistical content increased their statistical content during peer review. The availability of guidelines on statistics in the review forms of journals was associated with an initial similarity of statistical content of manuscripts but did not have any relevant implications on manuscript change during peer review. We found that when reports were more concentrated on statistical content, there was a higher probability that these manuscripts were eventually rejected by editors.
Studying database problems in small businesses
Creators: name: Brown, Ron T.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2002
Subjects: University Press
Data Quality
Database Administrators
Usability
Database management systems
Software Analysis

description: This study investigates the database (DB) environment of university presses across the United States. A questionnaire survey was administered to database administrators (DBAs) of university press DBs, followed by semi-structured interviews. The survey and the semi-structured interviews were conducted to determine the tasks, system environment and problems that DBAs of university presses encounter. The presses surveyed had multiple operating systems (OSs) and/or database management systems (DBMSs). The importance of mailing functions and exporting monthly financial reports arose in the interviews. The majority of the DBAs interviewed said that there was little documentation of the press DB and the press was either migrating or planning to migrate to a new DBMS. As time continues, the tasks of the DBA and the DB environment will continue to get more complex. Software designers of DBs need to take into account the needs of small businesses by dividing the increasing job responsibilities of the DBA between intelligent automated software and other stakeholders in the DB environment.
Understanding and optimising the packing density of perylene bisimide layers on CVD-grown graphene
Creators: name: Berner, Nina C.
name: Winters, Sinéad
name: Backes, Claudia
name: Yim, Chanyoung
name: Dümbgen, Kim C.
name: Kaminska, Izabela
name: Mackowski, Sebastian
name: Cafolla, Attilio A.
name: Hirsch, Andreas
name: Duesberg, Georg S.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The non-covalent functionalisation of graphene is an attractive strategy to alter the surface chemistry of graphene without damaging its superior electrical and mechanical properties. Using the facile method of aqueous-phase functionalisation on large-scale CVD-grown graphene, we investigated the formation of different packing densities in self-assembled monolayers (SAMs) of perylene bisimide derivatives and related this to the amount of substrate contamination. We were able to directly observe wet-chemically deposited SAMs in scanning tunnelling microscopy (STM) on transferred CVD graphene and revealed that the densely packed perylene ad-layers adsorb with the conjugated π-system of the core perpendicular to the graphene substrate. This elucidation of the non-covalent functionalisation of graphene has major implications on controlling its surface chemistry and opens new pathways for adaptable functionalisation in ambient conditions and on the large scale.
description: 27 pages (including SI), 10 figures
Optimized Configurable Architectures for Scalable Soft-Input Soft-Output MIMO Detectors with 256-QAM
Creators: name: Mansour, Mohammad M.
name: Jalloul, Louay M. A.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: This paper presents an optimized low-complexity and high-throughput multiple-input multiple-output (MIMO) signal detector core for detecting spatially-multiplexed data streams. The core architecture supports various layer configurations up to 4, while achieving near-optimal performance, as well as configurable modulation constellations up to 256-QAM on each layer. The core is capable of operating as a soft-input soft-output log-likelihood ratio (LLR) MIMO detector which can be used in the context of iterative detection and decoding. High area-efficiency is achieved via algorithmic and architectural optimizations performed at two levels. First, distance computations and slicing operations for an optimal 2-layer maximum a posteriori (MAP) MIMO detector are optimized to eliminate the use of multipliers and reduce the overhead of slicing in the presence of soft-input LLRs. We show that distances can be easily computed using elementary addition operations, while optimal slicing is done via efficient comparisons with soft decision boundaries, resulting in a simple feed-forward pipelined architecture. Second, to support more layers, an efficient channel decomposition scheme is presented that reduces the detection of multiple layers into multiple 2-layer detection subproblems, which map onto the 2-layer core with a slight modification using a distance accumulation stage and a post-LLR processing stage. Various architectures are accordingly developed to achieve a desired detection throughput and run-time reconfigurability by time-multiplexing of one or more component cores. The proposed core is applied as well to design an optimal multi-user MIMO detector for LTE. The core occupies an area of 1.58MGE and achieves a throughput of 733 Mbps for 256-QAM when synthesized in 90 nm CMOS.