cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Programmatic Innovations that Accord with the Retention of Women in STEM Careers
Creators: name: Balasubramanian, R.
name: Nostrand, D. Findley-Van
name: Fleenor, M. C.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Physics Education (physics.ed-ph)
subject: FOS: Physical sciences

description: Gender representation in the physical sciences remains inequitable and continues to lag behind other fields. Even though there exists adequate documentation regarding programmatic postures and innovations, difficulties persist within the physics discipline. In this paper, we present innovative, programmatic implementations over an eight-year period at an undergraduate, liberal arts physics program. Some of these innovations accord with nationally-published, `best practices' for undergraduate physics programs, while others are novel to the program's context. Within this eight-year period, alterations are separated into curricular, co-curricular, and experiential elements. Innovations are introduced in some detail, and data are presented before, during, and after their introduction. While it is currently impossible to say which elements had the greatest impact, the synergistic combination did have a positive effect on the program. Not only did the number of total majors and graduates increase, there was a 200% increase of women degree recipients compared to the previous ten years, which boosted average graduation rates above the national average (30% > 20%). Women were retained within the undergraduate physics major at a higher percentage during this time period when compared to men in the program. Lastly, these women physics majors maintained careers in science advancement fields at a rate of ~90% after $\leq5$ years post-graduation. While this paper presents a singular case study, the purpose is two-fold: a) to validate quantitatively the work of national physics organizations within the context of a liberal arts institution, and b) to suggest that a multi-level approach is most efficacious when considering programmatic innovations.
description: 23 pages, 8 figures, accepted in Frontiers in Education, section STEM Education (23/02/23)
Properties of the half-filled Hubbard model investigated by the strong coupling diagram technique
Creators: name: Sherman, A.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The equation for the electron Green's function of the fermionic Hubbard model, derived using the strong coupling diagram technique, is solved self-consistently for the near-neighbor form of the kinetic energy and for half-filling. In this case the Mott transition occurs at the Hubbard repulsion $U_c\approx 6.96t$, where $t$ is the hopping constant. The calculated spectral functions, density of states and momentum distribution are compared with results of Monte Carlo simulations. A satisfactory agreement was found for $U>U_c$ and for temperatures, at which magnetic ordering and spin correlations are suppressed. For $U
description: 7 pages, 7 figures
The tourism forecasting competition
Creators: name: Athanasopoulos, George
name: Hyndman, Rob J
name: Song, Haiyan
name: Wu, Doris C
Publisher: name: Monash University
Year: 2022

description: We evaluate the performance of various methods for forecasting tourism demand. The data used include 380 monthly series, 427 quarterly series and 530 yearly series, all supplied to us by tourism bodies or by academics from previous tourism forecasting studies. The forecasting methods implemented in the competition are univariate time series approaches, and also econometric models. This forecasting completion differs from previous competitions in several ways: (i) we concentrate only on tourism demand data; (ii) we include econometric approaches; (iii) we evaluate forecast interval coverage as well as point forecast accuracy; (iv) we observe the effect of temporal aggregation on forecasting accuracy; and (v) we consider the mean absolute scaled error as an alternative forecasting accuracy measure.
Non-Standard Words as Features for Text Categorization
Creators: name: Beliga, Slobodan
name: Martinčić-Ipšić, Sanda
Publisher: name: arXiv
Year: 2014
Subjects: subject: Computation and Language (cs.CL)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: This paper presents categorization of Croatian texts using Non-Standard Words (NSW) as features. Non-Standard Words are: numbers, dates, acronyms, abbreviations, currency, etc. NSWs in Croatian language are determined according to Croatian NSW taxonomy. For the purpose of this research, 390 text documents were collected and formed the SKIPEZ collection with 6 classes: official, literary, informative, popular, educational and scientific. Text categorization experiment was conducted on three different representations of the SKIPEZ collection: in the first representation, the frequencies of NSWs are used as features; in the second representation, the statistic measures of NSWs (variance, coefficient of variation, standard deviation, etc.) are used as features; while the third representation combines the first two feature sets. Naive Bayes, CN2, C4.5, kNN, Classification Trees and Random Forest algorithms were used in text categorization experiments. The best categorization results are achieved using the first feature set (NSW frequencies) with the categorization accuracy of 87%. This suggests that the NSWs should be considered as features in highly inflectional languages, such as Croatian. NSW based features reduce the dimensionality of the feature space without standard lemmatization procedures, and therefore the bag-of-NSWs should be considered for further Croatian texts categorization experiments.
description: IEEE 37th International Convention on Information and Communication Technology, Electronics and Microelectronics (MIPRO 2014), pp. 1415-1419, 2014
Additional file 3 of A patients’ view of OA: the Global Osteoarthritis Patient Perception Survey (GOAPPS), a pilot study
Creators: name: Vitaloni, Marianna
name: Bemden, Angie Botto-Van
name: Sciortino, Rosa
name: Carné, Xavier
name: Quintero, Maritza
name: Santos-Moreno, Pedro
name: Espinosa, Rolando
name: Rillo, Oscar
name: Monfort, Jordi
name: Abajo, Francisco De
name: Oswald, Elizabeth
name: Matucci, Marco
name: Souich, Patrick Du
name: Möller, Ingrid
name: Baures, Montserrat Romera
name: Vinci, Arlene
name: Scotton, Deborah
name: Bibas, Marco
name: Eakin, Guy
name: Verges, Josep
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Sociology
subject: FOS: Sociology
subject: Science Policy

description: Additional file 3. Figure showing the joints reported by participants in the category “other”. Patients could report OA in joints other than the options offered as an answer (knee, hip, spine, hand). Each column represents the localization(s) of OA as diagnosed by their medical doctor.
Accelerated Matrix Element Method with Parallel Computing
Creators: name: Schouten, Doug
name: DeAbreu, Adam
name: Stelzer, Bernd
Publisher: name: arXiv
Year: 2014
Subjects: subject: Computational Physics (physics.comp-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The matrix element method utilizes ab initio calculations of probability densities as powerful discriminants for processes of interest in experimental particle physics. The method has already been used successfully at previous and current collider experiments. However, the computational complexity of this method for final states with many particles and degrees of freedom sets it at a disadvantage compared to supervised classification methods such as decision trees, k nearest-neighbour, or neural networks. This note presents a concrete implementation of the matrix element technique using graphics processing units. Due to the intrinsic parallelizability of multidimensional integration, dramatic speedups can be readily achieved, which makes the matrix element technique viable for general usage at collider experiments.
Removal and replacement of interference in tied-array radio pulsar observations using the spectral kurtosis estimator
Creators: name: Purver, M.
name: Bassa, C. G.
name: Cognard, I.
name: Janssen, G. H.
name: Karuppusamy, R.
name: Kramer, M.
name: Lee, K. J.
name: Liu, K.
name: McKee, J. W.
name: Perrodin, D.
name: Sanidas, S.
name: Smits, R.
name: Stappers, B. W.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We describe how to implement the spectral kurtosis method of interference removal (zapping) on a digitized signal of averaged power values. Spectral kurtosis is a hypothesis test, analogous to the t-test, with a null hypothesis that the amplitudes from which power is formed belong to a `good' distribution -- typically Gaussian with zero mean -- where power values are zapped if the hypothesis is rejected at a specified confidence level. We derive signal-to-noise ratios (SNRs) as a function of amount of zapping for folded radio pulsar observations consisting of a sum of signals from multiple telescopes in independent radio-frequency interference (RFI) environments, comparing four methods to compensate for lost data with coherent (tied-array) and incoherent summation. For coherently summed amplitudes, scaling amplitudes from non-zapped telescopes achieves a higher SNR than replacing zapped amplitudes with artificial noise. For incoherently summed power values, the highest SNR is given by scaling power from non-zapped telescopes to maintain a constant mean. We use spectral kurtosis to clean a tied-array radio pulsar observation by the Large European Array for Pulsars (LEAP): the signal from one telescope is zapped with time and frequency resolutions of 6.25 $μ$s and 0.16 MHz, removing interference along with 0.27 per cent of `good' data, giving an uncertainty of 0.25 $μ$s in pulse time of arrival (TOA) for PSR J1022+1001. We use a single-telescope observation to demonstrate recovery of the pulse profile shape, with 0.6 per cent of data zapped and a reduction from 1.22 to 0.70 $μ$s in TOA uncertainty.
description: 16 pages, 9 figures
Enhancing $\ell_1$-minimization estimates of polynomial chaos expansions using basis selection
Creators: name: Jakeman, John D.
name: Eldred, Michael S.
name: Sargsyan, Khachik
Publisher: name: arXiv
Year: 2014
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: In this paper we present a basis selection method that can be used with $\ell_1$-minimization to adaptively determine the large coefficients of polynomial chaos expansions (PCE). The adaptive construction produces anisotropic basis sets that have more terms in important dimensions and limits the number of unimportant terms that increase mutual coherence and thus degrade the performance of $\ell_1$-minimization. The important features and the accuracy of basis selection are demonstrated with a number of numerical examples. Specifically, we show that for a given computational budget, basis selection produces a more accurate PCE than would be obtained if the basis is fixed a priori. We also demonstrate that basis selection can be applied with non-uniform random variables and can leverage gradient information.
Robotik und Programmieren an Heilpädagogischen Schulen. Ein strukturiertes Literaturreview
Creators: name: Platz, Armin
Publisher: name: Zenodo
Year: 2022
Subjects: Sonderpädagogik
Masterarbeit
Robotik und Programmieren
Heilpädagogische Schulen
Literaturreview

description: Die Auswirkungen der Digitalisierung prägt auch den Unterricht an Heilpädagogischen Schulen. Die vorliegende Arbeit bietet einen Überblick der zentralen Begrifflichkeiten und Konzepte und zeigt auf, welche Rolle der Einsatz von Robotik und Programmierung bei der Vermittlung von informatischem Fachwissen sowie Schlüsselkompetenzen an HPS spielen kann. Anhand eines strukturierten Literaturreviews wird dargestellt, in welchem Mass die aktuelle Forschungsliteratur dieses Themenfeld behandelt. Die Ergebnisse verdeutlichen, dass Robotik und Programmieren u. a. dazu beitragen können, Anwendungskompetenzen zu erweitern. Zudem zeigte sich eine grosse Motivation sowie ein hoher Anteil effektiver Lernzeit. Gleichzeitig wurde ein grosser Mangel an Fachliteratur sowie ein Entwicklungsrückstand im Bereich handlungsorientierter Unterrichtsmaterialien deutlich. Eine exemplarische Unterrichtseinheit mit «Lego Education Spike Essential» zeigt auf, was bei der Adaption von Lehrmitteln für HPS wichtig ist.
Additional file 1 of A patients’ view of OA: the Global Osteoarthritis Patient Perception Survey (GOAPPS), a pilot study
Creators: name: Vitaloni, Marianna
name: Bemden, Angie Botto-Van
name: Sciortino, Rosa
name: Carné, Xavier
name: Quintero, Maritza
name: Santos-Moreno, Pedro
name: Espinosa, Rolando
name: Rillo, Oscar
name: Monfort, Jordi
name: Abajo, Francisco De
name: Oswald, Elizabeth
name: Matucci, Marco
name: Souich, Patrick Du
name: Möller, Ingrid
name: Baures, Montserrat Romera
name: Vinci, Arlene
name: Scotton, Deborah
name: Bibas, Marco
name: Eakin, Guy
name: Verges, Josep
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Sociology
subject: FOS: Sociology
subject: Science Policy

description: Additional file 1. Global Osteoarthritis Patient Perception Survey (GOAPPS) questionnaire. English version.
Additional file 1 of An exploration into physician and surgeon data sensemaking: a qualitative systematic review using thematic synthesis
Creators: name: Whitelock-Wainwright, Emma
name: Koh, Jia Wei
name: Whitelock-Wainwright, Alexander
name: Talic, Stella
name: Rankin, David
name: Gašević, Dragan
Publisher: name: figshare
Year: 2022
Subjects: subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences
subject: Science Policy
subject: 111714 Mental Health
subject: FOS: Health sciences

description: Additional file 1. Supplementary Material: Appendix.
Empirical non-parametric estimation of the Fisher Information
Creators: name: Berisha, Visar
name: Hero, Alfred O.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Computation (stat.CO)
subject: Information Theory (cs.IT)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: The Fisher information matrix (FIM) is a foundational concept in statistical signal processing. The FIM depends on the probability distribution, assumed to belong to a smooth parametric family. Traditional approaches to estimating the FIM require estimating the probability distribution function (PDF), or its parameters, along with its gradient or Hessian. However, in many practical situations the PDF of the data is not known but the statistician has access to an observation sample for any parameter value. Here we propose a method of estimating the FIM directly from sampled data that does not require knowledge of the underlying PDF. The method is based on non-parametric estimation of an $f$-divergence over a local neighborhood of the parameter space and a relation between curvature of the $f$-divergence and the FIM. Thus we obtain an empirical estimator of the FIM that does not require density estimation and is asymptotically consistent. We empirically evaluate the validity of our approach using two experiments.
description: 12 pages
Scaling laws governing stochastic growth and division of single bacterial cells
Creators: name: Iyer-Biswas, Srividya
name: Wright, Charles S.
name: Henry, Jonathan T.
name: Lo, Klevin
name: Burov, Stanislav
name: Lin, Yihan
name: Crooks, Gavin E.
name: Crosson, Sean
name: Dinner, Aaron R.
name: Scherer, Norbert F.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Biological Physics (physics.bio-ph)
subject: Cell Behavior (q-bio.CB)
subject: Quantitative Methods (q-bio.QM)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: Uncovering the quantitative laws that govern the growth and division of single cells remains a major challenge. Using a unique combination of technologies that yields unprecedented statistical precision, we find that the sizes of individual Caulobacter crescentus cells increase exponentially in time. We also establish that they divide upon reaching a critical multiple ($\approx$1.8) of their initial sizes, rather than an absolute size. We show that when the temperature is varied, the growth and division timescales scale proportionally with each other over the physiological temperature range. Strikingly, the cell-size and division-time distributions can both be rescaled by their mean values such that the condition-specific distributions collapse to universal curves. We account for these observations with a minimal stochastic model that is based on an autocatalytic cycle. It predicts the scalings, as well as specific functional forms for the universal curves. Our experimental and theoretical analysis reveals a simple physical principle governing these complex biological processes: a single temperature-dependent scale of cellular time governs the stochastic dynamics of growth and division in balanced growth conditions.
description: Text+Supplementary
First Experimental Characterization of Microwave Emission from Cosmic Ray Air Showers
Creators: name: Smida, R.
name: Werner, F.
name: Engel, R.
name: Arteaga-Velazquez, J. C.
name: Bekk, K.
name: Bertaina, M.
name: Bluemer, J.
name: Bozdog, H.
name: Brancus, I. M.
name: Chiavassa, A.
name: Cossavella, F.
name: Di Pierro, F.
name: Doll, P.
name: Fuchs, B.
name: Fuhrmann, D.
name: Grupen, C.
name: Haungs, A.
name: Heck, D.
name: Hoerandel, J. R.
name: Huber, D.
name: Huege, T.
name: Kampert, K. -H.
name: Kang, D.
name: Klages, H.
name: Kleifges, M.
name: Kroemer, O.
name: Link, K.
name: Luczak, P.
name: Ludwig, M.
name: Mathes, H. J.
name: Mathys, S.
name: Mayer, H. J.
name: Melissas, M.
name: Morello, C.
name: Neunteufel, P.
name: Oehlschlaeger, J.
name: Palmieri, N.
name: Pekala, J.
name: Pierog, T.
name: Rautenberg, J.
name: Rebel, H.
name: Riegel, M.
name: Roth, M.
name: Salamida, F.
name: Schieler, H.
name: Schoo, S.
name: Schroeder, F. G.
name: Sima, O.
name: Stasielak, J.
name: Toma, G.
name: Trinchero, G. C.
name: Unger, M.
name: Weber, M.
name: Weindl, A.
name: Wilczynski, H.
name: Will, M.
name: Wochele, J.
name: Zabierowski, J.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We report the first direct measurement of the overall characteristics of microwave radio emission from extensive air showers. Using a trigger provided by the KASCADE-Grande air shower array, the signals of the microwave antennas of the CROME (Cosmic-Ray Observation via Microwave Emission) experiment have been read out and searched for signatures of radio emission by high-energy air showers in the GHz frequency range. Microwave signals have been detected for more than 30 showers with energies above 3*10^16 eV. The observations presented in this Letter are consistent with a mainly forward-directed and polarised emission process in the GHz frequency range. The measurements show that microwave radiation offers a new means of studying air showers at energies above 10^17 eV.
description: Accepted for publication in PRL
Balancing Weighted Substreams in MIMO Interference Channels
Creators: name: Yetis, Cenk M.
name: Zeng, Yong
name: Anand, Kushal
name: Guan, Yong Liang
name: Gunawan, Erry
Publisher: name: arXiv
Year: 2014
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: Substreams refer to the streams of each user in a system. Substream weighting, where the weights determine the prioritization order, can be important in multiple-input multiple-output interference channels. In this letter, a distributed algorithm is proposed for the problem of power minimization subject to weighted SINR constraint. The algorithm is based on two basic features, the well known distributed power control algorithm by Yates in 1995 and a simple linear search to find feasible SINR targets. The power control law used in the proposed algorithm is proven to linearly converge to a unique fixed-point.
description: To be published at IEEE Wireless Commun. Letters
Induced fermionic currents in de Sitter spacetime in the presence of a compactified cosmic string
Creators: name: Mohammadi, A.
name: de Mello, E. R. Bezerra
name: Saharian, A. A.
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We investigate the vacuum fermionic currents in the geometry of a compactified cosmic string on background of de Sitter spacetime. The currents are induced by magnetic fluxes running along the cosmic string and enclosed by the compact dimension. We show that the vacuum charge and the radial component of the current density vanish. By using the Abel-Plana summation formula, the azimuthal and axial currents are explicitly decomposed into two parts: the first one corresponds to the geometry of a straight cosmic string and the second one is induced by the compactification of the string along its axis. For the axial current the first part vanishes and the corresponding topological part is an even periodic function of the magnetic flux along the string axis and an odd periodic function of the flux enclosed by the compact dimension with the periods equal to the flux quantum. The azimuthal current density is an odd periodic function of the flux along the string axis and an even periodic function of the flux enclosed by the compact dimension with the same period. Depending on the magnetic fluxes, the planar angle deficit can either enhance or reduce the azimuthal and axial currents. The influence of the background gravitational field on the vacuum currents is crucial at distances from the string larger than the de Sitter curvature radius. In particular, for the geometry of a straight cosmic string and for a massive fermionic field, we show that the decay of the azimuthal current density is damping oscillatory with the amplitude inversely proportional to the fourth power of the distance from the string. This behavior is in clear contrast with the case of the string in Minkowski bulk where the current density is exponentially suppressed at large distances.
description: 25 pages, 5 figures
Instability of solitary waves for nonlinear Schrödinger equations of derivative type
Creators: name: Ohta, Masahito
Publisher: name: arXiv
Year: 2014
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: We study the orbital stablity and instability of solitary wave solutions for nonlinear Schrödinger equations of derivative type.
description: Some typos are corrected
Mechanical annealing and memories in a disordered solid
Creators: name: Keim, Nathan C.
name: Medina, Dani
Publisher: name: arXiv
Year: 2021
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Shearing a disordered or amorphous solid for many cycles with a constant strain amplitude can anneal it, relaxing a sample to a steady state that encodes a memory of that amplitude. This steady state also features a remarkable stability to amplitude variations that allows one to read the memory. Here we shed new light on both annealing and memory, by considering how to mechanically anneal a sample to have as little memory content as possible. In experiments, we show that a "ring-down" protocol reaches a comparable steady state, but with no discernible memories and minimal structural anisotropy. We introduce a method to characterize the population of rearrangements within a sample, and show how it connects with the response to amplitude variation and the size of annealing steps. These techniques can be generalized to other forms of glassy matter and a wide array of disordered solids, especially those that yield by flowing homogeneously.
Quantized and maximum entanglement from sublattice symmetry
Creators: name: Wilming, Henrik
name: Osborne, Tobias J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We observe that the many-body eigenstates of any quadratic, fermionic Hamiltonian with sublattice symmetry have quantized entanglement entropies between the sublattices: the entanglement comes in multiple singlets. Moreover, such systems always have a ground state that is maximally entangled between the two sublattices. In fact we also show that under the same assumptions there always exists a (potentially distinct) basis of energy eigenstates that do not conserve the particle number in which each energy eigenstate is maximally entangled between the sublattices. No additional properties, such as translation invariance, are required. We also show that the quantization of ground state entanglement may persist when interactions are introduced.
description: 5+4 pages, 4 figures; v2: added results for interacting model, improved presentation, close to published version
Deviated nasal septum hinders intranasal sprays: A computer simulation study
Creators: name: Pawar, Sachin
name: Frank, Dennis
name: Kimbell, Julia
name: Cannon, Daniel
name: Rhee, John
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2012

description: This study investigates how deviated nasal septum affects the quantity and distribution of spray particles, and examines the effects of inspiratory airflow and head position on particle transport.
Room Temperature Electrical Detection of Spin Polarized Currents in Topological Insulators
Creators: name: Dankert, André
name: Geurs, Johannes
name: Kamalakar, M. Venkata
name: Dash, Saroj P.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Topological insulators (TIs) are a new class of quantum materials that exhibit spin momentum locking (SML) of massless Dirac fermions in the surface states. Usually optical methods, such as angle and spin-resolved photoemission spectroscopy, have been employed to observe the helical spin polarization in the surface states of three-dimensional (3D) TIs up to room temperatures. Recently, spin polarized surface currents in 3D TIs were detected by electrical methods using ferromagnetic (FM) contacts in a lateral spin-valve measurement geometry. However, probing the spin texture with such electrical approaches is so far limited to temperatures below 125K, which restricts its application potential. Here we demonstrate the room temperature electrical detection of the spin polarization on the surface of Bi$_2$Se$_3$ due to SML by employing spin sensitive FM tunnel contacts. The current-induced spin polarization on the Bi$_2$Se$_3$ surface is probed at room temperature by measuring a spin-valve signal while switching the magnetization direction of the FM detector. The spin signal increases linearly with current bias, reverses sign with current direction, exhibits a weak temperature dependence and decreases with higher TI thickness, as predicted theoretically. Our results demonstrate the electrical detection of the spin polarization on the surface of 3D TIs, which could lead to innovative spin-based quantum information technology at ambient temperatures.
description: Incl. Supplementary information
title: Automatisiertes RFID-Antennen-Matching mithilfe eines Vektor-Netzwerkanalysators
Creators: name: Juwan, Michael
Publisher: name: FH CAMPUS 02 (CAMPUS 02 Fachhochschule der Wirtschaft)
Year: 2023
Subjects: subject: 621 Angewandte Physik

description: Diese wissenschaftliche Arbeit, welche für die Fachhochschule CAMPUS 02 durchgeführt wird, setzt sich mit der automatisierten und softwaregestützten Antennen-Anpassung im NFC-Bereich mithilfe eines Vektor-Netzwerk-Analysators (VNA) auseinander. Das Programm soll zur einfachen und automatisierten Antennenanpassung ohne tieferes Fachwissen des Benutzers fähig sein und etwaige Projekte im Bereich Forschung und Entwicklung an der Fachhochschule CAMPUS 02 vereinfachen. Ziel ist, die Antennen-Anpassung als Prozess abbilden zu können und alle nötigen Schritte mithilfe eines günstigen VNAs und der Software umzusetzen mit so wenig Benutzerinteraktionen wie nötig. Das fertige System soll von der Genauigkeit der Messung nahe der eines um ein vielfaches teureren VNAs liegen. Die Funktionsweisen eines NFC-Systems und dessen Antenne wird analysiert und alle wichtigen Punkte für die Anpassung einer Antenne ermittelt. Aufbauend auf den gesammelten Informationen werden Methoden zur Ermittlung der Antennenparameter und deren Anpassungsschaltung erörtert und evaluiert. Die benötigten Maßnahmen zur Umsetzung der Methoden wie etwaige Messungen und Berechnungen mithilfe des VNAs werden aufgeführt und analysiert. Für die Antennenanpassung wird ein C# Programm geschrieben, welches die Messungen und Kalibrationen am VNA durchführt und mit wenigen Benutzereingaben visuell und tabellarisch alle benötigten Daten für die Antennenanpassung liefert.
description: This scientific work is carried out for the university of applied science CAMPUS 02 and deals with the automated and software-supported antenna matching in the NFC area using a vector network analyser (VNA). The program is designed to facilitate simple and automated antenna customization without the user's deeper technical expertise and to simplify any research and development projects at FH CAMPUS 02 in this field. The goal is to be able to map the antenna matching as a process and to implement all necessary steps with the help of an economical VNA and the software with as few user interactions as necessary. The finished system should be close to that of a much more expensive VNA in terms of measurement accuracy. The functioning of an NFC system and its antenna is analysed and all important aspects for the matching of an antenna are determined. Based on the collected information, methods for determining the antenna parameters and their matching circuit are discussed and evaluated. The steps needed to implement the methods, such as any measurements and calculations using the VNA, are listed and analysed. For the antenna matching a C# program is written, which manages the measurements and calibrations for the VNA and provides all necessary data visually and tabularly for the antenna matching requiring only little user inputs.
Orbital-dependent second-order scaled-opposite-spin correlation functionals in the optimized effective potential method
Creators: name: Grabowski, I.
name: Fabiano, E.
name: Teale, A.
name: Śmiga, S.
name: Buksztel, A.
name: Della Sala, F.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The performance of correlated optimized effective potential (OEP) functionals based on the spin-resolved second-order correlation energy is analyzed. The relative importance of singly- and doubly- excited contributions as well as the effect of scaling the same- and opposite- spin components is investigated in detail comparing OEP results with Kohn-Sham (KS) quantities determined via an inversion procedure using accurate ab initio electronic densities. Special attention is dedicated in particular to the recently proposed scaled-opposite-spin OEP functional [I. Grabowski, E. Fabiano and F. Della Sala, Phys. Rev. B, 87, 075103, (2013)] which is the most advantageous from a computational point of view. We find that for high accuracy a careful, system dependent, selection of the scaling coefficient is required. We analyze several size-extensive approaches for this selection. Finally, we find that a composite approach, named OEP2-SOSh, based on a post-SCF rescaling of the correlation energy can yield high accuracy for many properties, being comparable with the most accurate OEP procedures previously reported in the literature but at substantially reduced computational effort.
description: 14 pages, 4 figures
title: Toronto's first street kids and the origins of child welfare systems in Canada part 1 : the early years
Creators: name: Dunlop, Ted
Publisher: name: Strathprints - University of Strathclyde
Year: 2017

description: This study focuses on the evolution of a philanthropic movement in the second half of 19th Century Canada that gave particular attention to a population of children and youth in Toronto known as newsboys and newsgirls. The plight of these children, who were largely living on the streets although in many instances still connected in varying degrees to their families, attracted growing attention in Toronto as the city emerged as a major commercial and industrial hub in Canada in the closing decades of the century. Mounting public concern about these wayward young people was fueled by alarmist (though sometimes sympathetic) newspaper accounts of an expanding population of children and youth who were plying their trade from a very young age on the streets selling newspapers, shoelaces, pencils and later working as what were called bootblacks. In establishment circles, these children and youth came to be viewed as a threat to public order whose rough apprenticeship on the streets, so it was speculated, left them vulnerable to a life of crime and prostitution later in life. However, in time, the attention that this population garnered did help usher in a new era that began giving recognition to some fundamental rights of all children. From this, we witness the begrudging acceptance in those early days of a more activist role that government might play in the development of policies that allowed for greater state intervention in protecting vulnerable and marginalized children and youth.
A Planck Radiation and Quantization Scheme for Human Cognition and Language
Creators: name: Aerts, Diederik
name: Beltran, Lester
Publisher: name: arXiv
Year: 2022
Subjects: subject: Neurons and Cognition (q-bio.NC)
subject: Computation and Language (cs.CL)
subject: Quantum Physics (quant-ph)
subject: FOS: Biological sciences
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: As a result of the identification of 'identity' and 'indistinguishability' and strong experimental evidence for the presence of the associated Bose-Einstein statistics in human cognition and language, we argued in previous work for an extension of the research domain of quantum cognition. In addition to quantum complex vector spaces and quantum probability models, we showed that quantization itself, with words as quanta, is relevant and potentially important to human cognition. In the present work, we build on this result, and introduce a powerful radiation quantization scheme for human cognition. We show that the lack of independence of the Bose-Einstein statistics compared to the Maxwell-Boltzmann statistics can be explained by the presence of a 'meaning dynamics', which causes words to be attracted to the same words. And so words clump together in the same states, a phenomenon well known for photons in the early years of quantum mechanics, leading to fierce disagreements between Planck and Einstein. Using a simple example, we introduce all the elements to get a better and detailed view of this 'meaning dynamics', such as micro and macro states, and Maxwell-Boltzmann, Bose-Einstein and Fermi-Dirac numbers and weights, and compare this example and its graphs, with the radiation quantization scheme of a Winnie the Pooh story, also with its graphs. By connecting a concept directly to human experience, we show that entanglement is a necessity for preserving the 'meaning dynamics' we identified, and it becomes clear in what way Fermi-Dirac addresses human memory. Within the human mind, as a crucial aspect of memory, in spaces with internal parameters, identical words can nevertheless be assigned different states and hence realize locally and contextually the necessary distinctiveness, structured by a Pauli exclusion principle, for human thought to thrive.
description: 7 figures
Approximate discrete dynamics of EMG signal
Creators: name: Mukherjee, Sayan
name: Palit, Sanjay Kumar
name: Bhattacharya, D. K.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Neurons and Cognition (q-bio.NC)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: Approximation of a continuous dynamics by discrete dynamics in the form of Poincare map is one of the fascinating mathematical tool, which can describe the approximate behaviour of the dynamics of the dynamical system in lesser dimension than the embedding diemnsion. The present article considers a very rare biomedical signal like Electromyography (EMG) signal. It determines suitable time delay and reconstruct the attractor of embedding diemnsion three. By measuring its Lyapunov exponent, the attractor so reconstructed is found to be chaotic. Naturally the Poincare map obtained by corresponding Poincare section is to be chaotic too. This may be verified by calculation of Lyapunov exponent of the map. The main objective of this article is to show that Poincare map exists in this case as a 2D map for a suitable Poincare section only. In fact, the article considers two Poincare sections of the attractor for construction of the Poincare map. It is seen that one such map is chaotic but the other one is not so, both are verified by calculation of Lyapunov exponent of the map.
title: Beehive Tracker
Creators: name: Rieger, Alexander
Publisher: name: FH CAMPUS 02 (CAMPUS 02 Fachhochschule der Wirtschaft)
Year: 2023
Subjects: subject: 621 Angewandte Physik

description: Bienen sind wohl der wichtigste Bestäuber für die Landwirtschaft, obwohl der Honigbienenbestand in den letzten zehn Jahren um fast 50% abgenommen hat. Die meisten kommerziell betriebenen Bienenstöcke befinden sich in abgelegenen Gebieten, in denen der Diebstahl dieser Bienenstöcke ein großes Problem für die Imker darstellt. In dieser Arbeit wird untersucht, unter welchen optimalen Bedingungen ein Bienenstock überleben und Honig produzieren kann, wie diese Bedingungen gemessen werden und wie ein Bienenstock nachverfolgt werden kann. Daher wurde ein Prototyp für die Platzierung im Bienenstock gebaut, um Temperatur, Luftfeuchtigkeit, Gewicht und die GPS-Position zu messen. Ein Batteriesystem wurde entwickelt, um das Gerät bis zu sechs Monate mit Strom zu versorgen. Um diese Geräte remote überwachen zu können, wurde eine mobile Verbindung zu einem Cloud-Server hergestellt. Dieser CloudServer bietet eine grafische Benutzeroberfläche für den einfachen Zugriff auf die hochgeladenen Daten des Bienenstocks und löst Alarme aus, wenn ein Diebstahl festgestellt wird.
description: Bees are arguably the single-most important pollinator to agriculture, although the honeybee stock has decreased by almost 50% in the last decade. Most of the commercially operated beehives are placed in remote areas, where theft of those beehives is a huge issue for beekeepers. This thesis examines the optimal conditions a beehive needs to survive and to produce honey, as well as how to measure those conditions and how to keep track of a beehive. Therefore, a prototype device was built to be placed inside the beehive to measure temperature, humidity, weight, and the GPS position. A battery system was developed to keep the device powered for up to six months. To be able to monitor those devices remotely a mobile connection to a cloud server was established. This cloud server provides a graphical user interface for easy access to the uploaded data of the beehive, and raises alarms if theft is detected.
Sulfur-bearing species in molecular clouds
Creators: name: Bilalbegovic, G.
name: Baranovic, G.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Atomic and Molecular Clusters (physics.atm-clus)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: We study several molecules that could help in the solution of the missing sulfur problem in dense clouds and circumstellar regions, as well as in the clarification of the sulfur chemistry in comets. These sulfur molecules are: the trimer (CH2S)3 and the tetramer (CH2S)4 of thioformaldehyde, pentathian S5CH2, hexathiepan S6CH2, thiirane C2H4S, trisulfane HSSSH, and thioacetone (CH3)2CS. Infrared spectra of these species are calculated using density functional theory methods. The majority of calculated bands belong to the mid-infrared, with some of them occurring in the near and far-infrared region. We suggest that some of unidentified spectral features measured by Infrared Space Observatory in several active galactic nuclei and starburst galaxies could be caused by 1,3,5-trithiane ((CH2S)3), 1,3,5,7-tetrathiocane ((CH2S)4), and thiirane (C2H4S). The objects whose unidentified infrared features we compare with calculated bands are: NGC 253, M82, NGC 1068, Circinus, Arp 220, 30 Doradus, Orion KL, and Sgr B2.
description: accepted for publication in MNRAS
Pricing Time-to-Event Contingent Cash Flows: A Discrete-Time Survival Analysis Approach
Creators: name: Lautier, Jackson P.
name: Pozdnyakov, Vladimir
name: Yan, Jun
Publisher: name: arXiv
Year: 2022
Subjects: subject: Risk Management (q-fin.RM)
subject: FOS: Economics and business
subject: 91G40 (Primary), 62N02 (Secondary), 91G70

description: Prudent management of insurance investment portfolios requires competent asset pricing of fixed-income assets with time-to-event contingent cash flows, such as consumer asset-backed securities (ABS). Current market pricing techniques for these assets either rely on a non-random time-to-event model or may not utilize detailed asset-level data that is now available with most public transactions. We first establish a framework capable of yielding estimates of the time-to-event random variable from securitization data, which is discrete and often subject to left-truncation and right-censoring. We then show that the vector of discrete-time hazard rate estimators is asymptotically multivariate normal with independent components, which has not yet been done in the statistical literature in the case of both left-truncation and right-censoring. The time-to-event distribution estimates are then fed into our cash flow model, which is capable of calculating a formulaic price of a pool of time-to-event contingent cash flows vis-á-vis calculating an expected present value with respect to the estimated time-to-event distribution. In an application to a subset of 29,845 36-month leases from the Mercedes-Benz Auto Lease Trust 2017-A (MBALT 2017-A) bond, our pricing model yields estimates closer to the actual realized future cash flows than the non-random time-to-event model, especially as the fitting window increases. Finally, in certain settings, the asymptotic properties of the hazard rate estimators allow investors to assess the potential uncertainty of the price point estimates, which we illustrate for a subset of 493 24-month leases from MBALT 2017-A.
description: 50 pages, 6 figures, 3 tables, contact corresponding author to obtain data
An introduction to PT-symmetric quantum mechanics -- time-dependent systems
Creators: name: Fring, Andreas
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: I will provide a pedagogical introduction to non-Hermitian quantum systems that are PT-symmetric, that is they are left invariant under a simultaneous parity transformation (P) and time-reversal (T). I will explain how generalised versions of this antilinear symmetry can be utilised to explain that these type of systems possess real eigenvalue spectra in parts of their parameter spaces and how to set up a consistent quantum mechanical framework for them that enables a unitary time-evolution. In the second part I will explain how to extend this framework to explicitly time-dependent Hamiltonian systems and report in particular on recent progress made in this context. I will explain how to construct the essential key quantity in this framework, the time-dependent Dyson map and metric and solutions to the time-dependent Schrödinger equation, in an algebraic fashion, using time-dependent Darboux transformations, utilising Lewis-Riesenfeld invariants, point transformations and some approximation methods. I comment on the ambiguities of this metric and demonstrate that this can even lead to infinite series of metric operators. I conclude with some applications to PT-symmetrically coupled oscillators, demonstrate the equivalence of the time-dependent double wells and unstable anharmonic oscillators and show how the unphysical PT$-symmetrically broken regions in the parameter space for the time-independent theory becomes physical in the explicitly time-dependent systems. I discuss how this leads to a prolongation of the otherwise rapidly decaying von Neumann entropy. The so-called sudden death of the entropy is stopped at a finite value.
description: 37 pages, Lecture notes, Contribution to the proceedings of the Quantum Fest 2021, International Conference on Quantum Phenomena, Quantum Control and Quantum Optics, virtually held at Cinvestav Mexico, 25/10-29/10 2021 (eds. Marco Enr\'iquez, Sara Cruz y Cruz, Francisco Delgado, V\'ictor Manuel Vel\'azquez, Journal of Physics: Conference Series (IoP Publishing))
Open-Access-Vernetzungsstellen und -Initiativen der deutschen Bundesländer
Creators: name: Landesinitiative Openaccess.Nrw
name: Open-Access-Büro Berlin
name: Open-Access-Infopoint Schleswig-Holstein
name: Projekt "Open Access An HAWen Und PHen In Baden-Württemberg"
name: Vernetzungs- Und Kompetenzstelle Open Access Brandenburg
Publisher: name: Zenodo
Year: 2022

description: Auf diesem Poster stellen die Open-Access-Vernetzungsstellen und -Initiativen aus Berlin, Brandenburg, Nordrhein-Westfalen und Schleswig-Holstein, sowie das Projekt "Open Access an HAWen und PHen in Baden-Württemberg" ihre Aufgaben und Zielgruppen vor. Wir führen auf, welche Bedeutung Landesinitiativen und Vernetzungsstellen für ein Bundesland haben, und wie wir miteinander kooperieren.
Additional file 2 of A patients’ view of OA: the Global Osteoarthritis Patient Perception Survey (GOAPPS), a pilot study
Creators: name: Vitaloni, Marianna
name: Bemden, Angie Botto-Van
name: Sciortino, Rosa
name: Carné, Xavier
name: Quintero, Maritza
name: Santos-Moreno, Pedro
name: Espinosa, Rolando
name: Rillo, Oscar
name: Monfort, Jordi
name: Abajo, Francisco De
name: Oswald, Elizabeth
name: Matucci, Marco
name: Souich, Patrick Du
name: Möller, Ingrid
name: Baures, Montserrat Romera
name: Vinci, Arlene
name: Scotton, Deborah
name: Bibas, Marco
name: Eakin, Guy
name: Verges, Josep
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Sociology
subject: FOS: Sociology
subject: Science Policy

description: Additional file 2. Percentages as calculated on the total number of answers and on the total number of respondents.