cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
A GeoSPARQL Compliance Benchmark
Creators: name: Jovanovik, Milos
name: Homburg, Timo
name: Spasić, Mirko
Publisher: name: arXiv
Year: 2021
Subjects: subject: Databases (cs.DB)
subject: FOS: Computer and information sciences

description: We propose a series of tests that check for the compliance of RDF triplestores with the GeoSPARQL standard. The purpose of the benchmark is to test how many of the requirements outlined in the standard a tested system supports and to push triplestores forward in achieving a full GeoSPARQL compliance. This topic is of concern because the support of GeoSPARQL varies greatly between different triplestore implementations, and such support is of great importance for the domain of geospatial RDF data. Additionally, we present a comprehensive comparison of triplestores, providing an insight into their current GeoSPARQL support.
Constraining Ultra-light Axions with Galaxy Cluster Number Counts
Creators: name: Diehl, Johannes
name: Weller, Jochen
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In this paper we investigate the potential of current and upcoming cosmological surveys to constrain the mass and abundance of ultra-light axion (ULA) cosmologies with galaxy cluster number counts. ULAs, sometimes also referred to as Fuzzy Dark Matter, are well-motivated in many theories beyond the Standard Model and could potentially solve the $Λ$CDM small-scale crisis. Galaxy cluster counts provide a robust probe of the formation of structures in the Universe. Their distribution in mass and redshift is strongly sensitive to the underlying linear matter perturbations. In this forecast paper we explore two scenarios, firstly an exclusion limit on axion mass given a no-axion model and secondly constraints on an axion model. With this we obtain lower limits on the ULA mass on the order of $m_a \gtrsim 10^{-24}$ eV. However, this result depends heavily on the mass of the smallest reliably observable clusters for a given survey. Cluster counts, like many other cosmological probes, display an approximate degeneracy in the ULA mass vs. abundance parameter space, which is dependent on the characteristics of the probe. These degeneracies are different for other cosmological probes. Hence galaxy cluster counts might provide a complementary window on the properties of ultra-light axions.
description: 22 pages, 6 figures
Improving the portability of natural language interfaces through learning
Creators: name: McClement, Gregory J.
Publisher: name: University of British Columbia
Year: 2008

description: One major concern with natural language interfaces is dealing with the problem of porting the system from one domain to another. Early approaches required that significant parts of the system be rewritten. Improvements have been made to the point that a system can be configured for a new database by a database expert who has no special knowledge of Computational Linguistics. Unfortunately, this has not yet lead to the widespread use of natural language interfaces. Proposed here is a natural language interface that can he configured by a user that has no knowledge of Computational Linguistics and no knowledge of databases ie - no knowledge of formal query languages, no knowledge of relational databases and no knowledge about how the data is organized in the database. Such a user merely needs to know some specific information about the domain that is modelled by the database. For an employee database, specific information is knowledge about a particular employee, eg - their name, address, and department.
Decomposable representations and Lagrangian submanifolds of moduli spaces associated to surface groups
Creators: name: Schaffhauser, Florent
Publisher: name: arXiv
Year: 2007
Subjects: subject: Symplectic Geometry (math.SG)
subject: FOS: Mathematics
subject: 53D20, 53D30

description: In this paper, we construct a Lagrangian submanifold of the moduli space associated to the fundamental group of a punctured Riemann surface (the space of representations of this fundamental group into a compact connected Lie group). This Lagrangian submanifold is obtained as the fixed-point set of an anti-symplectic involution defined on the moduli space. The notion of decomposable representation provides a geometric interpretation of this Lagrangian submanifold.
Age and Sex Effects in Anchoring Vignette Studies:   Methodological and Empirical Contributions
Creators: name: Grol-Prokopczyk, Hanna
Publisher: name: European Survey Research Association
Year: 2013
Subjects: anchoring vignettes; reporting heterogeneity; differential item functioning

description: Anchoring vignettes are an increasingly popular tool for identifying and correcting for group differences in use of subjective ordered response categories.  However, existing techniques to maximize response consistency (use of the same standards for self-ratings as for vignette-ratings), which center on matching vignette characters’ demographic characteristics to respondents’ own characteristics, appear at times to be ineffective or to pose interpretive difficulties.  Specifically, respondents often appear to neglect instructions to treat vignette characters as age peers.  Furthermore, when vignette characters’ sex is matched to respondents’ sex, interpretation of sex differences in rating style is rendered problematic.  This study applies two experimental manipulations to a national American sample (n=1,765) to clarify best practices for enhancing response consistency.  First, an analysis of two methods of highlighting vignette characters’ age suggests that both yield better response consistency than previous, less prominent means.  Second, a comparison of ratings of same- and opposite-sex vignette characters suggests that, with avoidable exceptions, the sex of the respondent rather than of the vignette character drives observed sex differences in rating style.  Implications for interpretation and design of anchoring vignette studies are discussed.  Findings also show significant sex, educational, and racial/ethnic differences in styles of rating health, and racial/ethnic differences in styles of rating political efficacy. These findings underscore the incomparability of unadjusted subjective self-ratings across demographic groups.
description: Survey Research Methods, Vol 8, No 1 (2014)
Emerging magnetic nutation
Creators: name: Thibaudeau, Pascal
name: Nicolis, Stam
Publisher: name: arXiv
Year: 2021
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Other Condensed Matter (cond-mat.other)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Nutation has been recognized as of great significance for spintronics; but justifying its presence has proven to be a hard problem. In this paper we show that nutation can be understood as emerging from a systematic expansion of a kernel that describes the history of the interaction of a magnetic moment with a bath of colored noise. The parameter of the expansion is the ratio of the colored noise timescale to the precession period. In the process we obtain the Gilbert damping from the same expansion. We recover the known results, when the coefficients of the two terms are proportional to one another, in the white noise limit; and show how colored noise leads to situations where this simple relation breaks down, but what replaces it can be understood by the appropriate generalization of the fluctuation--dissipation theorem. Numerical simulations of the stochastic equations support the analytic approach. In particular we find that the equilibration time is about an order of magnitude longer than the timescale set by the colored noise for a wide range of values of the latter and we can identify the presence of nutation in the non-uniform way the magnetization approaches equilibrium.
description: 7 pages, 2 figures
Measurement Error in Retrospective Work Histories
Creators: name: Pina Sánchez, Jose
name: Koskinen, Johan
name: Plewis, Ian
Publisher: name: European Survey Research Association
Year: 2014
Subjects: Measurement error, survey, retrospective design, work history, administrative data

description: Measurement error in retrospective reports of work status has been difficult to quantify in the past. Issues of confidentiality have made access to datasets linking survey responses to a valid administrative source very problematic. This study uses a Swedish register of unemployment as a benchmark against which responses from two survey questions are compared and hence the presence of measurement error elucidated. We carry out separate analyses for the different forms that measurement error in retrospective reports of unemployment can take: miscounting of the number of spells of unemployment, mismeasuring duration in unemployment, and misdating starts of spells and misclassification of status. The prevalence of measurement error for different social categories and interview formats is also examined, leading to a better understanding of the error-generating mechanisms that interact when interviewees are asked to produce retrospective reports of past work status.
description: Survey Research Methods, Vol 8, No 1 (2014)
Quantum metrology for non-Markovian processes
Creators: name: Altherr, Anian
name: Yang, Yuxiang
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Quantum metrology is a rapidly developing branch of quantum technologies. While various theories have been established on quantum metrology for Markovian processes, i.e., quantum channel estimation, quantum metrology for non-Markovian processes is much less explored. In this Letter, we establish a general framework of non-Markovian quantum metrology. For any parametrized non-Markovian process on a finite-dimensional system, we derive a formula for the maximal amount of quantum Fisher information that can be extracted from it by an optimally controlled probe state. In addition, we design an algorithm that evaluates this quantum Fisher information via semidefinite programming. We apply our framework to noisy frequency estimation, where we find that the optimal performance of quantum metrology is better in the non-Markovian scenario than in the Markovian scenario and explore the possibility of efficient sensing via simple variational circuits.
description: 5 pages, 6 figures + appendix; published version
Magnetic field enhancement of superconductivity in ultra-narrow wires
Creators: name: Rogachev, A.
name: Wei, T. -C.
name: Pekker, D.
name: Bollinger, A. T.
name: Goldbart, P. M.
name: Bezryadin, A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We study the effect of an applied magnetic field on sub-10nm wide MoGe and Nb superconducting wires. We find that magnetic fields can enhance the critical supercurrent at low temperatures, and does so more strongly for narrower wires. We conjecture that magnetic moments are present, but their pair-breaking effect, active at lower magnetic fields, is suppressed by higher fields. The corresponding microscopic theory, which we have developed, quantitatively explains all experimental observations, and suggests that magnetic moments have formed on the wire surfaces.
description: 4 pages, 3 figures, 1 table
Collecting Biomarkers Using Trained Interviewers. Lessons Learned from a Pilot Study
Creators: name: McFall, Stephanie L.
name: Conolly, Anne
name: Burton, Jonathan
Publisher: name: European Survey Research Association
Year: 2014
Subjects: survey design, data collection, biomarkers, feasibility

description: This paper reports the design and outcomes of a pilot study for the UK Household Longitudinal Study (UKHLS), Understanding Society, to develop and test the feasibility of collection of biomarkers by trained non-clinical interviewers. Feasibility tests performance of procedures, that they are technically satisfactory and reasonable in relation to alternatives. The dimensions reported are recruitment and training of interviewers, completeness, acceptability and time required for data collection, and quality of the biological samples. Some comparisons are made with measures conducted by nurses in wave 2 of the UK Household Longitudinal Study, Understanding Society. Biomeasures included anthropometrics, blood pressure, grip strength and the collection of saliva and dried blood spots. We implemented measurement protocols, introduced training and certification of interviewers, who then collected data from 92 participants. The study produced information about duration of collection, participation and quality of blood and saliva samples. The pilot study informs the design decisions about the biosocial component of Understanding Society
description: Survey Research Methods, Vol 8, No 1 (2014)
Demonstration of a laser powder bed fusion combinatorial sample for high-throughput microstructure and indentation characterization
Creators: name: Weaver, Jordan S.
name: Pintar, Adam L.
name: Beauchamp, Carlos
name: Joress, Howie
name: Moon, Kil-Won
name: Phan, Thien Q.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Applied Physics (physics.app-ph)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: High-throughput experiments that use combinatorial samples with rapid measurements can be used to provide process-structure-property information at reduced time, cost, and effort. Developing these tools and methods is essential in additive manufacturing where new process-structure-property information is required on a frequent basis as advances are made in feedstock materials, additive machines, and post-processing. Here we demonstrate the design and use of combinatorial samples produced on a commercial laser powder bed fusion system to study 60 distinct process conditions of nickel superalloy 625: five laser powers and four laser scan speeds in three different conditions. Combinatorial samples were characterized using optical and electron microscopy, x-ray diffraction, and indentation to estimate the porosity, grain size, crystallographic texture, secondary phase precipitation, and hardness. Indentation and porosity results were compared against a regular sample. The smaller-sized regions (3 mm x 4 mm) in the combinatorial sample have a lower hardness compared to a larger regular sample (20 mm x 20 mm) with similar porosity (< 0.03 %). Despite this difference, meaningful trends were identified with the combinatorial sample for grain size, crystallographic texture, and porosity versus laser power and scan speed as well as trends with hardness versus stress-relief condition.
description: 44 pages, 13 figures, 4 tables (not including the supplemental material) submitted to Materials & Design
Στρατηγικές Διαχείρησης του Κινδύνου Αιολικής Παραγωγής σε Αποκεντροποιημένα Ενεργειακά Συστήματα
Creators: name: Χριστοδούλου, Θεόδωρος Σάββα
Publisher: name: Aristotle University of Thessaloniki
Year: 2019
Subjects: Αιολική ενέργεια
Αντιστάθμιση κινδύνου
Διαφοροποίηση
Wind energy
Hedging
Diversification

description: Στην ανάλυση μας υπολογίζουμε την αποτελεσματικότητα δύο διαφορετικών στρατηγικών για την διαχείρηση του κινδύνου αιολικής παραγωγής στην Ισπανία, ο οποίος ορίζεται ως η ημερήσια μεταβλητότητα της αιολικής παραγωγής σε καθορισμένες τοποθεσίες στην ευρύτερη περιοχή της Ιβηρικής Χερσόνησου. Η πρώτη στρατηγική βασίζεται στην ιδέα του σχεδιασμού χαρτοφυλακίων παραγωγής, τα οποία κατανέμουν την διαθέσιμη συνολική παραγωγική ισχύ στον χώρο και η δεύτερη στην αγοραπωλησία χρηματοοικονομικών συμβολαίων ( παράγωγα αιολικής ισχύς-Wind Power Futures), τα οποία έχουν ενταχθεί πρόσφατα στo ευρωπαϊκό χρηματιστήριο ενέργειας (European Energy Exchange) για επιλεγμένες χώρες (https://www.eex.com/en/). Τα χαρτοφυλάκια πραγματοποιούν μια σαφή διαφοροποίηση του κινδύνου παραγωγικότητας, μέσω της ενσωμάτωσης χωρικά κατανεμημένων αιολικών (ηλιακών) πάρκων με διαφορετικά προφίλ παραγωγικότητας. Η αποτελεσματικότητα της στρατηγικής της αντιστάθμισης κινδύνου (Hedging), συνίσταται στην ικανότητα των συμβολαίων να αναπαράγουν τις στοχαστικές ιδιότητες της αιολικής παραγωγής των διαφόρων τοποθεσιών. Παρατίθενται στοιχεία για την αποτελεσματικότητα των δύο αυτών στρατηγικών, μέσω της χρήσης οικονομετρικών υποδειγμάτων και τεχνικών αναδειγματοληψίας (bootstrapping). Τέλος, προτείνουμε τον σχεδιασμό νέων τύπων συμβολαίων,βασισμένα στους κοινούς παράγοντες κινδύνου που υποδεικνύει η παραγοντική ανάλυση και εκτιμούμε την αποτελεσματικότητά τους στην διαχείριση του κινδύνου παραγωγικότητας μεμονωμένων περιοχών.
description: We evaluate the effectiveness of two strategies for managing wind power generation risk in Spain, being broadly conceived as the daily variability of wind generation in designated locations around the Iberian Peninsula. The first strategy is based on the idea of forming a generation portfolio, which optimally distributes available capacity over space, and the second on trading financial contracts (aka wind power derivatives), which have been recently introduced in the European Energy Exchange for selected countries (https://www.eex.com/en/). These strategies have the same objective but their approach to risk management is fundamentally different. Power portfolios make an explicit diversification of risk by integrating spatially distributed wind (solar) farms with heterogeneous generation profiles. The effectiveness of the hedging instruments is determined by their ability to closely replicate the stochastic properties of wind generation on selected locations. We provide ample empirical evidence on the relative performance of each risk management approach, using bootstrapping techniques and advanced weather numerical modeling. Finally, we explore and provide empirical results of the potential of introducing new-type hedging instruments (Factor k-contracts), specially designed to capture different dimensions of the volumetric risk.
Variation in Incentive Effects across Neighbourhoods
Creators: name: Hanly, Mark J
name: Savva, George M
name: Clifford, Ian
name: Whelan, Brendan J
Publisher: name: European Survey Research Association
Year: 2014
Subjects: incentives; targeted designs; multilevel modelling; face-to-face survey

description: Small monetary incentives increase survey cooperation rates, however evidence suggests that the appeal of incentives may vary across sample subgroups. Fieldwork budgets can be most effectively distributed by targeting those subgroups where incentives will have the strongest appeal.  We examine data from a randomised experiment implemented in the pilot phase of the Irish Longitudinal Study of Ageing, which randomly assigned households to receive a higher (€25) or lower (€10) incentive amount. Using a random effects logistic regression model, we observe a variable effect of the higher incentive across geographic neighbourhoods. The higher incentive has the largest impact in neighbourhoods where baseline cooperation is low, as predicted by Leverage-Saliency theory. Auxiliary neighbourhood-level variables are linked to the sample frame to explore this variation further, however none of these moderate the incentive effect, suggesting that richer information is needed to identify sample subgroups where incentive budgets should be directed.
description: Survey Research Methods, Vol 8, No 1 (2014)
Ποιμαντικές διαστάσεις της εκκλησιολογίας του αγίου Νεκταρίου
Creators: name: Samardžić, Nektarije (Ratko) Nemanja
Publisher: name: Aristotle University of Thessaloniki
Year: 2019
Subjects: Νεκτάριος Πενταπόλεως (1846-1920)
Εκκλησιολογία
Ποιμαντική
Nektarios of Pentapolis (1846-1920)
Ecclesiology
Pastoral

description: Ο στόχος της εργασίας ήταν να ψηλαφήσουμε τις ποιμαντικές διαστάσεις της Εκκλησιολογίας ενός μεγάλου Αγίου της Εκκλησίας. Η έρευνα μας έφερε κοντά στην ενδιαφέρουσα, λόγω του μεταβατικού της χαρακτήρα εποχή του, ενώ μας αποκάλυψε αφανείς πτυχές της διδασκαλίας και της προσωπικότητάς του. Στην εργασία μας προσεγγίζουμε την προσωπικότητα του Αγίου μέσα στο ιστορικό πλαίσιο της εποχής που έζησε, αναφέροντας στις βασικές συνιστώσες της πολιτικής του νέου Ελληνικού κράτους που καθόρισαν την πνευματικότητα της Εκκλησίας. Επίσης, προσπαθήσαμε να αναλύσουμε με συντομία όλα τα στοιχεία της Εκκλησιολογίας όπως εμφανίζονται στα συγγράμματά του και ταυτόχρονα να διακρίνουμε την ποιμαντική τους προοπτική, δηλαδή την πρακτική τους εφαρμογή στη ζωή των πιστών. Τέλος, θεωρήσαμε αναγκαίο να εξετάσουμε με ποιον τρόπο ισορροπούν στο έργο του το χαρισματικό και το θεσμικό στοιχείο. Πέρα από τις θεωρητικές προσεγγίσεις που ανιχνεύονται στα συγγράμματά του, αποκαλυπτικά για το συγκεκριμένο ζήτημα ήταν και τα στοιχεία του βίου του. Δεν θα μπορούσε άλλωστε να είναι διαφορετικά τα πράγματα, καθώς το άγιο Πνεύμα είναι εκείνο που εξισορροπεί και ορθοτομεί τα πράγματα μέσω των Αγίων που αποτελούν παραδείγματα για τους πιστούς, πρώτα με τη ζωή τους και στη συνέχεια με τη διδασκαλία τους.
description: The aim of this study is to outline the pastoral dimensions of the ecclesiology of a great Saint Nectarios. Our research has brought us to the very interesting, due to its transitional character, era, whereas it revealed unknown parts of his teaching and personality. In our study, we approach the personality of the Saint, within the historical framework in which he lived, in regard to the basic principles of the policy of the new Hellenic State which determined the spirituality of the Church. Additionally, we tried to analyze all the elements of the Ecclesiology as found in his writings, as well as to distinguish their pastoral perspective, that is their practical use in the life of the faithful. Finally, we consider that is very crucial to examine the ways in which the charismatic and the institutional element harmonically coexist. Besides the theoretical approaches that are recognized in the writings of Saint Nektarios, the data of his life were proven very revealing. Such as reality could not be different since the Holy Spirit is the one that balances everything through the Saints who function as examples for the faithful, first with their lives and then with their teaching.
Quantum Phase Transition in Lattice Model of Unconventional Superconductors
Creators: name: Sawamura, Kenji
name: Moribe, Yuki
name: Ichinose, Ikuo
Publisher: name: arXiv
Year: 2007
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: In this paper we shall introduce a lattice model of unconventional superconductors (SC) like d-wave SC in order to study quantum phase transition at vanishing temperature ($T$). Finite-$T$ counterpart of the present model was proposed previously with which SC phase transition at finite $T$ was investigated. The present model is a noncompact U(1) lattice-gauge-Higgs model in which the Higgs boson, the Cooper-pair field, is put on lattice links in order to describe d-wave SC. We first derive the model from a microscopic Hamiltonian in the path-integral formalism and then study its phase structure by means of the Monte Carlo simulations. We calculate the specific heat, monopole densities and the magnetic penetration depth (the gauge-boson mass). We verified that the model exhibits a second-order phase transition from normal to SC phases. Behavior of the magnetic penetration depth is compared with that obtained in the previous analytical calculation using XY model in four dimensions. Besides the normal to SC phase transition, we also found that another second-order phase transition takes place within the SC phase in the present model. We discuss physical meaning of that phase transition.
description: 12 pages, 10 figures, references added, some discussion on the results added
Microphone check
Creators: name: Parker, Verdena
name: Escamilla, Ramón
name: Newbold, Lindsey
name: Spence, Justin
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2021
Subjects: subject: hup

description: Audio file VP-220308-01: Microphone check (Verdena says the date in Hupa).
Language MOOCs: Learners’ Motivation and Background
Creators: name: Καριπίδη, Δέσποινα Ιωάννη
Publisher: name: Aristotle University of Thessaloniki
Year: 2019
Subjects: Γλωσσικά Μαζικά Ανοιχτά Διαδικτυακά Μαθήματα
Κίνητρα συμμετοχής
Προφίλ συμμετεχόντων
Language MOOCs
Learners’ motivation
Participants’ educational/personal background

description: The aim of the present master thesis is to research the educational and personal background of the participants in Massive Open Online Courses (MOOCs) of Spanish language. What follows is the analysis of learners’ motivation for registration on the above mentioned online courses. Moreover the dissertation examines the completion and drop-out rates for these specific MOOCs. The thesis is completed with suggestions for future improvements to the online courses, based on the participants’ visions and expectations.
description: Σκοπός της παρούσας μεταπτυχιακής εργασίας είναι η ανάλυση του προφίλ των συμμετεχόντων στα Μαζικά Ανοιχτά Διαδικτυακά μαθήματα (LMOOCs) για την εκμάθηση της ισπανικής γλώσσας. Ιδιαίτερη έμφαση δίνεται, επίσης, στη μελέτη των κινήτρων συμμετοχής στα εν λόγω διαδικτυακά μαθήματα. Στη συνέχεια αναλύονται οι αιτίες αποχώρησης από ένα MOOC σε συνάρτηση με τα χαμηλά ποσοστά ολοκλήρωσης του διαδικτυακού μαθήματος (drop-out rates /completion rates). Η εργασία ολοκληρώνεται με προτάσεις για τη βελτίωση των διαδικτυακών γλωσσικών μαθημάτων, λαμβάνοντας υπόψη τις απαντήσεις των συμμετεχόντων στο ερωτηματολόγιο της έρευνας.
On the Relative Advantage of Mixed-Mode versus Single-Mode Surveys
Creators: name: Vannieuwenhuyze, Jorre
Publisher: name: European Survey Research Association
Year: 2013
Subjects: Mixed-mode surveys, Single-mode surveys, Mean Squared Error, Survey Design, Survey Budget, Survey Costs

description: Survey researchers increasingly use mixed-mode surveys for general population data collection because mixed-mode surveys are argued to provide lower selection error at constant budgets or lower variable costs at constant selection error. Nevertheless, the advantage of lower selection error and variable costs might be counteracted by higher measurement error and by higher fixed costs. This trade-off between selection error, measurement error, variable costs and fixed costs has hardly been studied within the existing literature about mixed-mode surveys. This paper discusses a possible procedure for evaluating this trade-off by comparing the performance (mean squared error) of mixed-mode survey designs against single-mode survey designs. The procedure is further illustrated by real example data stemming from a mixed-mode mail---face-to-face survey. This illustration yields smaller errors for single-mode designs under low budgets but smaller errors for mixed-mode designs under large budgets or, alternatively, a budgetary advantage of single-mode designs when the allowed error is relatively high but a budgetary advantage of mixed-mode designs when the allowed error is relatively small. However, the validity of these results depend on several modelling assumptions which may be topics for future research.
description: Survey Research Methods, Vol 8, No 1 (2014)
A Spatially Extended Model for Residential Segregation
Creators: name: Aguilera, Antonio
name: Ugalde, Edgardo
Publisher: name: arXiv
Year: 2006
Subjects: subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: FOS: Physical sciences

description: In this paper we analyze urban spatial segregation phenomenon in terms of the income distribution over a population, and inflationary parameter weighting the evolution of housing prices. For this, we develop a discrete, spatially extended model based in a multi--agent approach. In our model, the mobility of socioeconomic agents is driven only by the housing prices. Agents exchange location in order to fit their status to the cost of their housing. On the other hand, the price of a particular house changes depends on the status of its tenant, and on the neighborhood mean lodging cost, weighted by a control parameter. The agent's dynamics converges to a spatially organized configuration, whose regularity we measured by using an entropy--like indicator. With this simple model we found a nontrivial dependence of segregation on both, the initial inequality of the socioeconomic agents and the inflationary parameter. In this way we supply an explanatory model for the segregation--inequality thesis putted forward by Douglas Massey.
description: 17 pages, 11 figures. email: aaguilera@colsan.edu.mx, ugalde@ifisica.uaslp.mx
Thermal neutron cross sections of amino acids from average contributions of functional groups
Creators: name: Romanelli, G.
name: Onorati, D.
name: Ulpiani, P.
name: Cancelli, S.
name: Perelli-Cippo, E.
name: Damián, J. I. Márquez
name: Capelli, S. C.
name: Croci, G.
name: Muraro, A.
name: Tardocchi, M.
name: Gorini, G.
name: Andreani, C.
name: Senesi, R.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: The experimental thermal neutron cross sections of the twenty proteinogenic amino acids have been measured over the incident-neutron energy range spanning from 1 meV to 10 keV and data have been interpreted using the multi-phonon expansion based on first-principles calculations. The scattering cross section, dominated by the incoherent inelastic contribution from the hydrogen atoms, can be rationalised in terms of the average contributions of different functional groups, thus neglecting their correlation. These results can be used for modelling the total neutron cross sections of complex organic systems like proteins, muscles, or human tissues from a limited number of starting input functions. This simplification is of crucial importance for fine-tuning of transport simulations used in medical applications, including boron neutron capture therapy as well as secondary neutrons-emission induced during proton therapy. Moreover, the parametrized neutron cross sections allow a better treatment of neutron scattering experiments, providing detailed sample self-attenuation corrections for a variety of biological and soft-matter systems.
Improving between-wave mailings on longitudinal surveys: A randomised experiment on the UK Millennium Cohort Study
Creators: name: Calderwood, Lisa
Publisher: name: European Survey Research Association
Year: 2014
Subjects: longitudinal; tracking; nonresponse; attrition; survey methods; between-wave mailing; covering letters; advance letters

description: Typically, longitudinal survey managers send ‘keep in touch’ mailings to sample members between waves to help minimise non-response through failure to locate individuals at future waves. This paper reports the results from a randomised experiment to improve the effectiveness of the between-wave mailing on the Millennium Cohort Study (MCS), a large-scale birth cohort study in the UK. Our experimental intervention, which involved revising the content of the covering letters used in the 2010 mailing, aimed to increase the proportion of sample members responding to the mailing, particularly among those with higher attrition rates i.e. lower educated sample members and minority ethnic groups. The re-design involved making the letter easier to read, due to a concern that poor literacy or English may be a barrier to returning the form for some groups, and changing the style and signatory, motivated by the psychological concepts of reciprocity, linking and helping tendencies. Our main finding, that the design of the covering letter has a minimal impact on the effectiveness of these mailings, will help guide further research in this area and help to inform practice on longitudinal surveys. The results also make an important contribution to the existing evidence on the content of advance letters more generally and thereby have broader applicability for survey research and practice.
description: Survey Research Methods, Vol 8, No 2 (2014)
Solid phase epitaxial growth of the correlated-electron transparent conducting oxide SrVO3
Creators: name: Marks, Samuel D.
name: Lin, Lin
name: Zuo, Peng
name: Strohbeen, Patrick J.
name: Jacobs, Ryan
name: Du, Dongxue
name: Waldvogel, Jason R.
name: Liu, Rui
name: Savage, Donald E.
name: Booske, John H.
name: Kawasaki, Jason K.
name: Babcock, Susan E.
name: Morgan, Dane
name: Evans, Paul G.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: SrVO3 thin films with a high figure of merit for applications as transparent conductors were crystallized from amorphous layers using solid phase epitaxy (SPE). Epitaxial SrVO3 films crystallized on SrTiO3 using SPE exhibit a room temperature resistivity of 2.5 x 10-5 Ohms cm, a residual resistivity ratio of 3.8, and visible light transmission above 0.5 for a 60 nm-thick film. SrVO3 layers were deposited at room temperature using radio-frequency sputtering in an amorphous form and subsequently crystallized by heating in controlled gas environment. The lattice parameters and mosaic angular width of x-ray reflections from the crystallized films are consistent with partial relaxation of the strain resulting from the epitaxial mismatch between SrVO3 and SrTiO3. A reflection high-energy electron diffraction study of the kinetics of SPE indicates that crystallization occurs via the thermally activated propagation of the crystalline/amorphous interface, similar to SPE phenomena in other perovskite oxides. Thermodynamic calculations based on density functional theory predict the temperature and oxygen partial pressure conditions required to produce the SrVO3 phase and are consistent with the experiments. The separate control of deposition and crystallization conditions in SPE presents new possibilities for the crystallization of transparent conductors in complex geometries and over large areas.
description: Keywords: epitaxial transparent conducting oxides, solid-phase epitaxy, strontium vanadate, phase selection in oxide synthesis
Decaying fermionic warm dark matter and XENON1T electronic recoil excess
Creators: name: Dutta, Koushik
name: Ghosh, Avirup
name: Kar, Arpan
name: Mukhopadhyaya, Biswarup
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: In the light of the recently observed XENON1T electronic recoil (ER) data, we investigate the possibility of constraining the parameter space of a generic fermionic warm dark matter (WDM), decaying into a standard model (SM) neutrino and a photon. The photon as a decay product, when produced inside the XENON1T chamber, interacts with an electron of a xenon (Xe) atom, leading to a contribution in the observed ER data. We add this dark matter (DM) induced signal over the standard background ($\rm B_0$) considered by the XENON1T collaboration and perform a $χ^2$ fit against the XENON1T data to obtain the best-fit values of the DM decay width and the associated $95\%$ confidence level (C.L.) band for DM mass ($m_χ$) varied in the range $2 - 60$ keV. Additionally, we have extended our analysis by including two other background models available in the literature and in each case, the corresponding limits on the DM decay width are estimated for DM mass ($m_χ$) in the domain $2 - 18$ keV. By comparing the constraints, obtained by fitting the XENON1T data, with the upper limits arising from various existing astrophysical and cosmological observations, we find that, for the background model $\rm B_0$, a fair amount of the DM parameter space is allowed at $95\%$ C.L. for DM masses outside the range $3.5\,{\rm keV} \lesssim m_χ\lesssim 8.5\,{\rm keV}$. However, in case of other two background models, reasonable parts of the DM parameter space are favoured at $95\%$ C.L. by all astrophysical data for all DM masses in the range $2 - 18$ keV.
description: 9 pages, 4 figures; text modified, figures modified, current version matches with the version published in Phys.Dark Univ
Pear Film Narrations
Creators: name: Parker, Verdena
name: Newbold, Lindsey
name: Spence, Justin
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2021
Subjects: subject: hup

description: Audio files VP-240208-03, VP-240208-04, and VP-240208-05: Narration of the Pear Film. Verdena narrates in Hupa twice, once while watching the video (VP-240208-03), then immediately after watching it (VP-240208-04), followed by an English translation (VP-240208-05). The Pear Film was produced by researchers at the University of California, Berkeley in 1975. For details, see Wallace Chafe (ed.), "The Pear Stories: Cognitive, Cultural, and Linguistic Aspects of Narrative Production." Norwood, New Jersey: Ablex (1980).
A virtual machine approach to parallel debugging
Creators: name: Lin, Kunhua
Publisher: name: University of British Columbia
Year: 2008

description: Debugging is generally considered to be difficult. The increased complexity and non determinism of parallel programs makes it even more difficult. It is one of the reasons that parallel machines are not widely used for computationally intensive applications even though recent progress on VLSI technology has significantly reduced the cost of building these machines. In this thesis, a two-phase approach to debugging parallel applications based on task-oriented virtual machines is proposed. In the first phase, a message passing event history of the application is constructed and analyzed against the specifications of the application to automatically identify and localize fatal errors in terms of the task number, the processor identity and the user program process. In the second phase, the code segments identified in the first phase are debugged in a simulated environment using effective sequential debugging techniques. This provides us with a technique to deal with the complexity of parallel programs through high-level abstractions and a divide-and-conquer strategy. As it is solely based on the execution history, this approach avoids the non-reproducibility that results from the nondeterministic characteristics of a parallel program. We have implemented a monitor and trace analyzer on a transputer-based multi computer for two virtual machines, PFVM (Processor Farm Virtual Machine) and DCVM(Divide and Conquer Virtual Machine). The effectiveness and limitations of our approach are demonstrated and evaluated.
Exterior dissipation, proportional decay, and integrals of motion
Creators: name: Aureli, M.
name: Hanna, J. A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Classical Physics (physics.class-ph)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: Given a dynamical system with $m$ independent conserved quantities, we construct a multi-parameter family of new systems in which these quantities evolve monotonically and proportionally, and are replaced by $m-1$ conserved linear combinations of themselves, with any of the original quantities as limiting cases. The modification of the dynamics employs an exterior product of gradients of the original quantities, and often evolves the system towards asymptotic linear dependence of these gradients in a nontrivial state. The process both generalizes and provides additional structure to existing techniques for selective dissipation in the literature on fluids and plasmas, nonequilibrium thermodynamics, and nonlinear controls. It may be iterated or adapted to obtain any reduction in the degree of integrability. It may enable discovery of extremal states, limit cycles, or solitons, and the construction of new integrable systems from superintegrable systems. We briefly illustrate the approach by its application to the cyclic three-body Toda lattice, driven from an aperiodic orbit towards a limit cycle.
description: minor changes
Τα Μεσοβυζαντινά κοσμήματα (10ος-12ος αιώνας) μέσα από τις ανασκαφικές έρευνες: νέα δεδομένα από το Καβαλάρι (Στάνοβο) του νομού Θεσσαλονίκης
Creators: name: Κωνσταντινίδου, Ελένη Δημητρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2019
Subjects: Μεσοβυζαντινά κοσμήματα
Χάλκινα κοσμήματα
Μεσοβυζαντινό νεκροταφείο
Middle Byzantine jewellery
Bronze jewellery
Middle Byzantine cemetery

description: Σκοπός της διατριβής ήταν η μελέτη ενός πρωτότυπου ανασκαφικού υλικού του 10ου -12ου αιώνα από την περιφέρεια της Θεσσαλονίκης, παρουσιάζοντας ταυτόχρονα όψεις των ιστορικών γεγονότων και συνθηκών που επηρέασαν την περιοχή αλλά και τα έθιμα ταφής της εποχής. Το σύνολο των χάλκινων κοσμημάτων που παρουσιάζονται προέρχεται από τάφους της Μέσης Βυζαντινής περιόδου που εντοπίστηκαν στο εσωτερικό ενός εγκαταλελειμμένου ναού του 19ου αιώνα στην αγροτική περιοχή Νοτιοανατολικά του Καβαλαρίου της επαρχίας Λαγκαδά. Τα κοσμήματα μελετήθηκαν σε σύγκριση με αντίστοιχα παραδείγματα από την Ελλάδα και τα Βαλκάνια, τα οποία συνέβαλλαν στη χρονολόγηση του συγκεκριμένου συνόλου. Μεταξύ των χάλκινων κοσμημάτων υπάρχει κι ένα μοναδικό στο είδος του περίαπτο, σφαιρικού σχήματος, με ιδιαίτερη τεχνική διακόσμησης.
description: In this dissertation we present an assemblage of Middle Byzantine bronze jewellery, dated between 10th – 12th centuries. The author examines the aspects of historical events and circumstances that affected the area of Thessaloniki at the time. The jewellery come from a small cemetery (14 graves were found and excavated), located in the rural area Southeast of Kavallari, a village 20 km. away from Thessaloniki, in the area of Langadas. Among the bronze jewellery that we found inside the graves, there is a unique piece, a pendant, in the shape of a sphere but with a unique decoration technique. All the jewels from this assemblage have many common elements with corresponding items from the whole Balkan peninsula, therefore they are analyzed accordingly.
Hidden Quantum Gravity in 4d Feynman diagrams: Emergence of spin foams
Creators: name: Baratin, Aristide
name: Freidel, Laurent
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We show how Feynman amplitudes of standard QFT on flat and homogeneous space can naturally be recast as the evaluation of observables for a specific spin foam model, which provides dynamics for the background geometry. We identify the symmetries of this Feynman graph spin foam model and give the gauge-fixing prescriptions. We also show that the gauge-fixed partition function is invariant under Pachner moves of the triangulation, and thus defines an invariant of four-dimensional manifolds. Finally, we investigate the algebraic structure of the model, and discuss its relation with a quantization of 4d gravity in the limit where the Newton constant goes to zero.
description: 28 pages (RevTeX4), 7 figures, references added
Cosmology with Standard Sirens at Cosmic Noon
Creators: name: Ye, Christine
name: Fishbach, Maya
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Gravitational waves (GWs) directly measure the luminosity distance to the merger, which, when combined with an independent measurement of the source's redshift, provides a novel probe of cosmology. The proposed next generation of ground-based GW detectors, Einstein Telescope and Cosmic Explorer, will detect tens of thousands of binary neutron stars (BNSs) out to cosmological distances ($z>2$), beyond the peak of the star formation rate (SFR), or "cosmic noon." At these distances, it will be challenging to measure the sources' redshifts by observing electromagnetic (EM) counterparts or statistically marginalizing over a galaxy catalog. In the absence of an EM counterpart or galaxy catalog, Ding et al. showed that theoretical priors on the merger redshift distribution can be used to infer parameters in a $w$CDM cosmology. We argue that in the BNS case, the redshift distribution will be measured by independent observations of short gamma ray bursts (GRBs), kilonovae, and known BNS host galaxies. We show that, in addition to measuring the background cosmology, this method can constrain the effects of dark energy on modified GW propagation. We consider the simple case in which the BNS rate is \textit{a priori} known to follow the SFR. If the SFR is perfectly known, $\mathcal{O}(10,000)$ events (to be expected within a year of observation with Cosmic Explorer) would yield a sub-tenth percent measurement of the combination $H_0^{2.8}Ω_M$. Fixing $H_0$ and $Ω_M$, this method may enable a 5\% measurement of the dark energy equation of state parameter. Fixing the background cosmology and probing modified GW propagation, the running of the Planck mass parameter $c_M$ may be measured to $\pm0.02$. Although realistically, the redshift evolution of the merger rate will be uncertain, prior knowledge of the peak redshift will provide valuable information for standard siren analyses.
description: 14 pages, 10 figures. Published in Phys. Rev. D
Logarithmic singularities of solutions to nonlinear partial differential equations
Creators: name: Tahara, Hidetoshi
name: Yamane, Hideshi
Publisher: name: arXiv
Year: 2007
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 35A20, 35L70

description: We construct a family of singular solutions to some nonlinear partial differential equations which have resonances in the sense of a paper due to T. Kobayashi. The leading term of a solution in our family contains a logarithm, possibly multiplied by a monomial. As an application, we study nonlinear wave equations with quadratic nonlinearities. The proof is by the reduction to a Fuchsian equation with singular coefficients.
Speeding in Web Surveys: The tendency to answer very fast and its association with straightlining
Creators: name: Zhang, Chan
name: Conrad, Frederick
Publisher: name: European Survey Research Association
Year: 2014
Subjects: Web surveys; satisficing; speeding; straightlining

description: Web surveys can be programmed to capture a variety of paradata regarding how respondents answer questions. These paradata provide great opportunities for researchers to assess response quality, specifically whether respondents engage in satisficing – not spending enough effort to provide accurate responses. In particular, speeding (i.e., giving answers very quickly) has increasingly been used as an indicator for satisficing and low response quality. However, few studies have examined whether speeding actually leads to compromised response quality. To address this gap in the literature, the current study investigates speeding behaviors among Web respondents from a probability-based panel. We first identify and characterize respondents who speed more frequently than others over the entire questionnaire. To explore the impact of speeding on response quality, we then examine whether respondents who speed more frequently also straightline in more grid questions. The results show that the tendency to speed is related to several respondent characteristics, particularly age (younger respondents are more likely to speed). This study also reveals that more speeding seems to be universally related to more straightlining, and this relationship is particularly strong among the less educated respondents.
description: Survey Research Methods, Vol 8, No 2 (2014)