cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Field-effect-induced midinfrared electroluminescence of a quantum-wire-cascade structure by remote d-doping
Creators: name: Schmult, Stefan
name: Keck, Ingo
name: Herrle, Thomas
name: Wegscheider, Werner
name: Bichler, Max
name: Schuh, Dieter
name: Abstreiter, Gerhard
Publisher: name: Universität Regensburg
Year: 2003
Subjects: subject: 530 Physik

description: We present a quantum-cascade emitter in the galliumarsenide/aluminum–galliumarsenide (GaAs/AlGaAs) heterosystem whose emission properties are controlled by an additional electric field perpendicular to the transport direction. In our case, the additional field is established by remote d-doping gives rise to an in-plane confinement creating a quantum- wire cascade. This field-effect quantum- cascade emitter is realized using the cleaved edge overgrowth method. Radiative electronic transitions between discrete energy levels in coupled quantum wires were calculated for such a structure. Without an additional electric field, no significant transport is observed. With a field applied, midinfrared emission is observed at a peak wave number of 1200 cm^–1 with a full width at half maximum of 300 cm^–1 for a heat-sink temperature of 20 K. The presented sample is an experimental proposal for a unipolar quantum-wire intersubband laser.
Carbon-doped high mobility two-dimensional hole gases on (110) faced GaAs
Creators: name: Schmult, Stefan
name: Gerl, Christian
name: Wurstbauer, Ursula
name: Mitzkus, C.
name: Wegscheider, Werner
Publisher: name: Universität Regensburg
Year: 2005
Subjects: subject: 530 Physik

description: Carbon-doped high mobility two-dimensional hole gases grown on (110) oriented GaAs substrates have been grown with hole mobilities exceeding 10^6 cm^2/Vs in single heterojunction GaAs/AlGaAs structures. At these high mobilities, a pronounced mobility anisotropy has been observed. Rashba induced spin-splitting in these asymmetric structures has been found to be independent on the transport direction.
Spin phase-space semiclassics for weak spin-orbit coupling
Creators: name: Zaitsev, Oleg
Publisher: name: Universität Regensburg
Year: 2002
Subjects: subject: 530 Physik

description: We apply the semiclassical spin coherent state method for the density of states by Pletyukhov et al (2002 Phys. Rev. Lett. 89 116601) in the weak spin–orbit coupling limit and recover the modulation factor in the semiclassical trace formula found by Bolte and Keppeler (1998 Phys. Rev. Lett. 81 1987; 1999 Ann. Phys., NY 274 125).
Anreizsysteme - Eine Möglichkeit zur Verbesserung der universitären Lehre?
Creators: name: Kiefer, Björn
name: Niederhaus, Constanze
name: Balzani, Daniel
name: Bobisch, Christian A.
name: Gerharz, Eva
name: Kruggel-Emden, Harald
name: Schwarz, Alexander
name: Thielbörger, Pierre
name: Weiss, Gregor N. F.
Publisher: name: TU Dortmund
Year: 2013
Subjects: subject: Anreizsystem Förderung Hochschullehre Universität Bochum Dortmund Duisburg-Essen Motivation Hochschullehrer/Hochschullehrerin
subject: 370

description: Eingeleitet wird das Journal mit dem Beitrag "Anreize für gute Lehre" von Kiefer, Niederhaus, Balzani, Bobisch, Gerharz, Kruggel-Emden, Schwarz, Thielbörger & Weiss, Mitgliedern der Global Young Faculty. In ihrer Umfrage in den UMAR-Universitäten gingen sie der Frage nach "Was motiviert Lehrende qualitativ gute Lehre anzubieten?". Ihre Ergebnisse überraschen und zeigen, welchen Stellenwert nach Meinung der Interviewten Lehre generell einnimmt.
description: Journal Hochschuldidaktik ; 24. Jahrgang 2013 Heft 1 und 2
Resonance- and Chaos-Assisted Tunneling in Mixed Regular-Chaotic Systems
Creators: name: Eltschka, Christopher
name: Schlagheck, Peter
Publisher: name: Universität Regensburg
Year: 2005
Subjects: subject: 530 Physik

description: We present evidence that nonlinear resonances govern the tunneling process between symmetry- related islands of regular motion in mixed regular-chaotic systems. In a similar way as for near-integrable tunneling, such resonances induce couplings between regular states within the islands and states that are supported by the chaotic sea. On the basis of this mechanism, we derive a semiclassical expression for the average tunneling rate, which yields good agreement in comparison with the exact quantum tunneling rates calculated for the kicked rotor and the kicked Harper.
The impact of COVID-19 social isolation on aspects of emotional and social cognition
Creators: name: Bland, Amy Rachel
name: Roiser, Jonathan Paul
name: Mehta, Mitul Ashok
name: Sahakian, Barbara Jacquelyn
name: Robbins, Trevor William
name: Elliott, Rebecca
Publisher: name: Taylor & Francis
Year: 2021
Subjects: subject: Medicine
subject: Evolutionary Biology
subject: FOS: Biological sciences
subject: Sociology
subject: FOS: Sociology
subject: 111714 Mental Health
subject: FOS: Health sciences

description: The present study aimed to examine the impact of COVID-19 social isolation upon aspects of emotional and social cognitive function. We predicted that greater impairments in emotional and social cognition would be observed in people who experienced more disruption to their usual social connectivity during COVID-19 social isolation. Healthy volunteers (N = 92) without prior mental health problems completed assessments online in their own homes during the most stringent period of the first COVID-19 “lockdown” in the UK (March – May 2020). Measures included two questionnaires probing levels of social isolation, anxiety levels, as well as five neuropsychological tasks assessing emotional and social cognition. Reduced positive bias in emotion recognition was related to reduced contact with friends, household size and communication method during social isolation. In addition, reduced positive bias for attention to emotional faces was related to frequency of contact with friends during social isolation. Greater cooperative behaviour in an ultimatum game was associated with more frequent contact with both friends and family during social isolation. The present study provides important insights into the detrimental effects of subjective and objective social isolation upon affective cognitive processes.
Sparse regulatory networks
Creators: name: James, Gareth M.
name: Sabatti, Chiara
name: Zhou, Nengfeng
name: Zhu, Ji
Publisher: name: arXiv
Year: 2010
Subjects: subject: Applications (stat.AP)
subject: FOS: Computer and information sciences

description: In many organisms the expression levels of each gene are controlled by the activation levels of known "Transcription Factors" (TF). A problem of considerable interest is that of estimating the "Transcription Regulation Networks" (TRN) relating the TFs and genes. While the expression levels of genes can be observed, the activation levels of the corresponding TFs are usually unknown, greatly increasing the difficulty of the problem. Based on previous experimental work, it is often the case that partial information about the TRN is available. For example, certain TFs may be known to regulate a given gene or in other cases a connection may be predicted with a certain probability. In general, the biology of the problem indicates there will be very few connections between TFs and genes. Several methods have been proposed for estimating TRNs. However, they all suffer from problems such as unrealistic assumptions about prior knowledge of the network structure or computational limitations. We propose a new approach that can directly utilize prior information about the network structure in conjunction with observed gene expression data to estimate the TRN. Our approach uses $L_1$ penalties on the network to ensure a sparse structure. This has the advantage of being computationally efficient as well as making many fewer assumptions about the network structure. We use our methodology to construct the TRN for E. coli and show that the estimate is biologically sensible and compares favorably with previous estimates.
description: Published in at http://dx.doi.org/10.1214/10-AOAS350 the Annals of Applied Statistics (http://www.imstat.org/aoas/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Zero-field magnetization reversal of two-body Stoner particles with dipolar interaction
Creators: name: Sun, Z. Z.
name: Lopez, Alexander
name: Schliemann, John
Publisher: name: arXiv
Year: 2010
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Nanomagnetism has recently attracted explosive attention, in particular, because of the enormous potential applications in information industry, e.g. new harddisk technology, race-track memory[1], and logic devices[2]. Recent technological advances[3] allow for the fabrication of single-domain magnetic nanoparticles (Stoner particles), whose magnetization dynamics have been extensively studied, both experimentally and theoretically, involving magnetic fields[4-9] and/or by spin-polarized currents[10-20]. From an industrial point of view, important issues include lowering the critical switching field $H_c$, and achieving short reversal times. Here we predict a new technological perspective: $H_c$ can be dramatically lowered (including $H_c=0$) by appropriately engineering the dipole-dipole interaction (DDI) in a system of two synchronized Stoner particles. Here, in a modified Stoner-Wohlfarth (SW) limit, both of the above goals can be achieved. The experimental feasibility of realizing our proposal is illustrated on the example of cobalt nanoparticles.
description: 5 pages, 4 figures
Pandemic reminders as psychological threat: thinking about COVID-19 lowers coping self-Efficacy among trauma-exposed adults
Creators: name: Lockett, McKenzie
name: Pyszczynski, Tom
name: Koole, Sander L.
Publisher: name: Taylor & Francis
Year: 2021
Subjects: subject: Medicine
subject: Molecular Biology
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Science Policy
subject: 111714 Mental Health
subject: FOS: Health sciences

description: Reminders of COVID-related problems have been pervasive throughout the COVID-19 pandemic. Such reminders could have negative mental health impacts, especially among psychologically vulnerable people, including those with trauma-related problems. We experimentally examined the effects of pandemic reminders among trauma-exposed participants sampled from Prolific (N = 238). Participants were induced to think about health-related or social isolation-related aspects of COVID-19 or their favourite TV show and existential anxiety and coping self-efficacy (CSE) were then assessed. Posttraumatic stress symptoms (PTSS) related to a prior stressor and COVID-related functional impairment were assessed as potential moderators of reactions to pandemic reminders. Results showed that both types of pandemic reminders lowered CSE among participants with either higher PTSS or COVID-related functional impairment. Pandemic reminders did not significantly affect existential anxiety. These findings suggest that reminders of the COVID-19 pandemic may undermine the mental health of psychologically vulnerable populations.
Semiclassical form factor for spectral and matrix element fluctuations of multidimensional chaotic systems
Creators: name: Turek, Marko
name: Spehner, Dominique
name: Müller, Sebastian
name: Richter, Klaus
Publisher: name: Universität Regensburg
Year: 2005
Subjects: subject: 530 Physik
subject: 05.45.Mt
subject: 03.65.Sq

description: We present a semiclassical calculation of the generalized form factor Kab(τ) which characterizes the fluctuations of matrix elements of the operators a and b in the eigenbasis of the Hamiltonian of a chaotic system. Our approach is based on some recently developed techniques for the spectral form factor of systems with hyperbolic and ergodic underlying classical dynamics and f=2 degrees of freedom, that allow us to go beyond the diagonal approximation. First we extend these techniques to systems with f>2. Then we use these results to calculate Kab(τ). We show that the dependence on the rescaled time τ (time in units of the Heisenberg time) is universal for both the spectral and the generalized form factor. Furthermore, we derive a relation between Kab(τ) and the classical time-correlation function of the Weyl symbols of ̂a and b.
BOZOR IQTISODIYOTIGA O'TISH DAVRIDA INTENSIV IQTISODIY RIVOJLANISH ORQALI TADBIRKORLIKNI RIVOJLANTIRISH
Creators: name: Burhon Erkinov Shuxratjon o`g'li Namangan muhandislik texnalogiya instituti iqtisodiyot fakulteti iqtisod yonalishi 14a_21 guruhi 3- kurs talabasi
Publisher: name: Zenodo
Year: 2023

description: Ushbu maqolada bozor iqtisodiyotiga o'tish davrida intensiv iqtisodiy rivojlanish orqali tadbirkorlikni rivojlantirish haqida so`z yuritilgan.
Kаlit sо'zlаr: iqtisodiy nazariya, iqtisodiy tizim, bozor iqtisodiyoti, erkin tovar-pul munosabatlari, xususiy mulk, iqtisodiyoti taraqqiyot, bozor munosabati.
A short-period super-Earth orbiting the M2.5 dwarf GJ3634. Detection with Harps velocimetry and transit search with Spitzer photometry
Creators: name: Bonfils, X.
name: Gillon, M.
name: Forveille, T.
name: Delfosse, X.
name: Deming, D.
name: Demory, B. -O.
name: Lovis, C.
name: Mayor, M.
name: Neves, V.
name: Perrier, C.
name: Santos, N. C.
name: Seager, S.
name: Udry, S.
name: Boisse, I.
name: Bonnefoy, M.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We report on the detection of GJ3634b, a super-Earth of mass m sin i = 7.0 +/-0.9 Mearth and period P = 2.64561 +/- 0.00066 day. Its host star is a M2.5 dwarf, has a mass of 0.45+/-0.05 Msun, a radius of 0.43+/-0.03 Rsun and lies 19.8+/-0.6 pc away from our Sun. The planet is detected after a radial-velocity campaign using the ESO/Harps spectrograph. GJ3634b had an a priori geometric probability to undergo transit of ~7% and, if telluric in composition, a non-grazing transit would produce a photometric dip of
description: A&A, accepted. Radial-velocity and photometric tables are available in electronic form at the CDS
The effect of induced COVID-19-related fear on psychological distance and time perception
Creators: name: Schelhorn, Iris
name: Buchner, Emily
name: Kosak, Ferdinand
name: Hutmacher, Fabian
name: Kinateder, Max
name: Shiban, Youssef
Publisher: name: Taylor & Francis
Year: 2021
Subjects: subject: Neuroscience
subject: Evolutionary Biology
subject: FOS: Biological sciences
subject: Sociology
subject: FOS: Sociology
subject: Science Policy
subject: 111714 Mental Health
subject: FOS: Health sciences

description: Emotional experience can influence cognitive estimates such as perceived psychological distance and time judgements. These estimators are crucial in threatening situations like the COVID-19 pandemic because the subjective perception of the closeness of a potential infection might influence behaviour. However, to date it remains unclear how fear affects these estimates. We report on data from N = 183 participants collected in Germany during the summer of 2020, when a “second wave” of COVID-19 infections was still only on the horizon of public awareness. We induced COVID-19-related fear in members of one group and compared their estimates of psychological distance and time judgements to those of a neutral group. Fear induction influenced these conjoint estimates in the way that an increase in infection rates appeared farther away and of shorter duration. Mediation analysis revealed inverse effects of changes in valence and ratings of Fear of COVID-19 on psychological distance. Possible explanations for these effects are discussed.
Magnetic-field dependence of transport in normal and Andreev billiards: A classical interpretation of the averaged quantum behavior
Creators: name: Fytas, Nikolaos G.
name: Diakonos, Fotis K.
name: Schmelcher, Peter
name: Scheid, Matthias
name: Lassl, Andreas
name: Richter, Klaus
name: Fagas, Giorgos
Publisher: name: Universität Regensburg
Year: 2005
Subjects: subject: 530 Physik
subject: 73.23.Ad
subject: 05.60.Gg
subject: 74.45.+c
subject: 05.60.Cd

description: We perform a comparative study of the quantum and classical transport probabilities of low-energy quasiparticles ballistically traversing normal and Andreev two-dimensional open cavities with a Sinai-billiard shape. We focus on the dependence of the transport on the strength of an applied magnetic field B. With increasing field strength the classical dynamics changes from mixed to regular phase space. Averaging out the quantum fluctuations, we find an excellent agreement between the quantum and classical transport coefficients in the complete range of field strengths. This allows an overall description of the non-monotonic behavior of the average magnetoconductance in terms of the corresponding classical trajectories, thus, establishing a basic tool useful in the design and analysis of experiments.
Focusing on the object of learning and the critical aspects : a case study of teacher candidates applying variation theory
Creators: name: Miechie
Publisher: name: University of British Columbia
Year: 2018

description: In an attempt to bridge the theory and practice gap in teacher education, this study employed a learning study approach as a platform for teacher candidates to learn about variation theory. This study investigated teacher candidates’ experiences in applying variation theory in lesson planning and explored how teacher candidates identify the object of learning and the critical aspects. In groups of four to five, 27 teacher candidates participated in a learning study and worked collaboratively to plan science lessons either on the topic of genetics and cell division (biology) or rate of reaction (chemistry). The lesson planning was framed using variation theory. Guided by a descriptive case study approach, variation theory was employed as the theoretical framework and phenomenography was the methodological approach. Data sources included the teacher candidates’ lesson plans, the researcher’s field notes, and participant interviews. Data analysis included the construction of individual profiles of the teacher candidates, followed by a construction of three categories of description that build on each other. Arranged in increasing complexity, the categories included: (1) Analysing content knowledge in order to develop a coherent learning plan; (2) Reflecting on personal experiences and beliefs about teaching and learning; and (3) Developing knowledge about students and their prior knowledge as informed by external resources. These categories captured the different ways the teacher candidates identified the object of learning and the critical aspects during their lesson planning. The findings revealed the complex nature of this critical stage of planning a lesson based on variation theory.
Time inhomogeneous Markov chains with wave-like behavior
Creators: name: Saloff-Coste, L.
name: Zúñiga, J.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics

description: Starting from a given Markov kernel on a finite set $V$ and a bijection $g$ of $V$, we construct and study a time inhomogeneous Markov chain whose kernel at time $n$ is obtained from $K$ by transport of $g^{n-1}$. We show that this construction leads to interesting examples, and we obtain quantitative results for some of these examples.
description: Published in at http://dx.doi.org/10.1214/09-AAP661 the Annals of Applied Probability (http://www.imstat.org/aap/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Nondispersive two-electron wave packets in driven helium
Creators: name: Schlagheck, Peter
name: Buchleitner, Andreas
Publisher: name: Universität Regensburg
Year: 2003
Subjects: subject: 530 Physik

description: We provide a detailed quantum treatment of the spectral characteristics and of the dynamics of nondispersive two-electron wave packets along the periodically driven, collinear frozen planet configuration of helium. These highly correlated, long-lived wave packets arise as a quantum manifestation of regular islands in a mixed classical phase space, which are induced by nonlinear resonances between the external driving and the unperturbed dynamics of the frozen-planet configuration. Particular emphasis is given to the dependence of the ionization rates of the wave packet states on the driving field parameters and on the quantum mechanical phase space resolution, preceded by a comparison of 1D and 3D life times of the unperturbed frozen planet. Furthermore, we study the effect of a superimposed static electric field component, which, on the grounds of classical considerations, is expected to stabilize the real 3D dynamics against large (and possibly ionizing) deviations from collinearity.
Continuous symmetry of C60 fullerene and its derivatives
Creators: name: Sheka, E. F.
name: Razbirin, B. S.
name: Nelson, E. A. Nikitina D. K.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Conventionally, the Ih symmetry of fullerene C60 is accepted which is supported by numerous calculations. However, this conclusion results from the consideration of the molecule electron system, of its odd electrons in particular, in a close-shell approximation without taking the electron spin into account. Passing to the open-shell approximation has lead to both the energy and the symmetry lowering up to Ci. Seemingly contradicting to a high-symmetry pattern of experimental recording, particularly concerning the molecule electronic spectra, the finding is considered in the current paper from the continuous symmetry viewpoint. Exploiting both continuous symmetry measure and continuous symmetry content, was shown that formal Ci symmetry of the molecule is by 99.99% Ih. A similar continuous symmetry analysis of the fullerene monoderivatives gives a reasonable explanation of a large variety of their optical spectra patterns within the framework of the same C1 formal symmetry exhibiting a strong stability of the C60 skeleton.
description: 11 pages. 5 figures. 6 tables
Resonance-Assisted Tunneling
Creators: name: Brodier, Olivier
name: Schlagheck, Peter
name: Ullmo, Denis
Publisher: name: Universität Regensburg
Year: 2002
Subjects: subject: 530 Physik

description: We present evidence that tunneling processes in near-integrable systems are enhanced due to the manifestation of nonlinear resonances and their respective island chains in phase space. A semiclassical description of this \"resonance-assisted\" mechanism is given, which is based on a local perturbative description of the dynamics in the vicinity of the resonances. As underlying picture, we obtain that the quantum state is coupled, via a succession of classically forbidden transitions across nonlinear resonances, to high excitations within the well, from where tunneling occurs with a rather large rate. The connection between this description and the complex classical structure of the underlying integrable dynamics is furthermore studied, giving ground to the general coherence of the description as well as guidelines for the identification of the dominant tunneling paths. The validity of this mechanism is demonstrated within the kicked Harper model, where good agreement between quantum and semiclassical (resonance-assisted) tunneling rates is found.
Can vertebral remains differentiate more than one species of Australian Cretaceous ichthyosaur?
Creators: name: Vakil, Vikram
name: Webb, Gregory E.
name: Cook, Alex G.
Publisher: name: Taylor & Francis
Year: 2021
Subjects: subject: Cell Biology
subject: Evolutionary Biology
subject: FOS: Biological sciences
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: 69999 Biological Sciences not elsewhere classified
subject: 110309 Infectious Diseases
subject: FOS: Health sciences
subject: Plant Biology

description: All currently described Cretaceous ichthyosaur remains in Australia have been referred to the single taxon Platypterygius australis M’Coy 1867, primarily on the basis of skull morphology. This research set out to determine if specimens could be attributed to P. australis on the basis of vertebral data alone. Vertebrae were measured and subjected to morphometric analysis for specimens previously attributed to P. australis, along with several unattributed specimens that either lack skulls or where existing skulls have not been described. Centrum length (CL) plots, together with a principle components analysis and multivariate analysis of variance, suggest that different specimens can be distinguished from each other on the basis of vertebrae. Although our analyses using only basic centrum dimensions are heavily impacted by size, and thus growth stage of individuals, two specimens previously attributed to P. australis on the basis of skull morphology alone plotted separately from each other in all analyses, with one plotting consistently near the outgroup taxon, Ophthalmosaurus natans (Marsh, 1879). Hence, the data are consistent either with very large intraspecific variation within vertebral patterns, or support the possibility that more than one Australian species occurs in the dataset. CL and multivariate data showed that juvenile ichthyosaurs plot differently relative to all subadults–adults, not only in their proportionately smaller vertebrae, but also in having consistently different shapes with little difference between the length of dorsal and caudal vertebrae. One subadult individual (RGC1) also showed similarity in length between dorsal and caudal vertebrae and has abnormal rib facets. We posit that it could either be an aberrant P. australis, or an otherwise unknown taxon. Although additional material is required, questions raised by this study suggest the need to test the postcranial remains of additional specimens, especially those with well-studied skulls, so as to identify the level of intraspecific variation or any sexual dimorphism, and to determine if any as yet undetected ichthyosaur taxa occurred in the Australian Early Cretaceous. Vikram Vakil [vikram.vakil@uqconnect.edu.au], Gregory E. Webb[g.webb@uq.edu.au] and Alex G. Cook [alex.cook@y7mail.com] School of Earth & Environmental Sciences, The University of Queensland, St Lucia, Brisbane, Queensland 4072, Australia.
Pengimplementasian Model Pembelajaran Fun Learning untuk Meningkatkan Minat Belajar di SMPN 3 Reteh
Creators: name: Suroyo, Denggan Tua Sianturi, Rafif Deopra Bowen, Fatinah Khairiyah, Klara Debora Manalu, Randu Kinanti Najla, Selviana Safitri, Siti Nurqasanah, Tio Pina Uli Sitohang, Trido Pasuna Purba
Publisher: name: Zenodo
Year: 2024

description: This study explores the implementation of fun learning and ice-breaking activities as effective strategies in enhancing the learning experience in educational settings. Fun learning, combined with ice-breaking techniques, aims to create an engaging and interactive classroom environment that promotes student participation and improves their understanding of the subject matter. The integration of these methods not only reduces anxiety and boredom but also fosters a positive attitude toward learning. By incorporating games, quizzes, and interactive activities, educators can capture students' attention, making complex concepts more accessible and enjoyable. Ice-breaking activities, in particular, are essential at the beginning of lessons to help students relax, build rapport, and encourage collaboration among peers. The study highlights the benefits of this approach, showing that students are more motivated and active in the learning process, leading to better academic outcomes. Moreover, fun learning and ice-breaking techniques cater to diverse learning styles, making education more inclusive and adaptable to different student needs. The findings suggest that adopting these methods can significantly enhance student engagement, retention of information, and overall academic performance. This study advocates for the broader application of fun learning and ice-breaking activities in various educational contexts to create a more dynamic and effective learning environment.
Programming of adiposity in female offspring by maternal obesity and exercise
Creators: name: Melanson, James
Publisher: name: University of British Columbia
Year: 2018

description: INTRODUCTION: In Canada, nearly half of women of child-bearing age are overweight (BMI 25-29.9 kg/m²) or obese (BMI ≥30 kg/m²). Current guidelines recommend moderate exercise for all pregnant women. However, little is known about the effect of exercise during pregnancy on the developing offspring. Rodent studies demonstrate that offspring from dams fed a high-fat diet have vessel-specific impairment in endothelium-dependent vascular function, greater adiposity, and impairments in glucose homeostasis. Further, offspring from exercised dams have improved glucose homeostasis. OBJECTIVE: In this thesis, I determined if maternal exercise during pregnancy mitigates the adverse effects of maternal obesity on offspring adiposity, glucose homeostasis, and vascular health in female offspring. METHODS: Dams (C57BL/6) were fed a control (10% energy from fat) or western diet (45% energy from fat) from weaning for 13 weeks and through breeding, pregnancy, and lactation. Just prior to breeding, dams were put into cages with or without a running wheel for voluntary exercise through breeding, pregnancy, and lactation. Offspring were weaned onto the control or western diet and maintained on the diet for 20 weeks; only female offspring were studied. Lean and fat mass were quantified by ¹H-NMR. Intraperitoneal insulin tolerance (IPITT), glucose tolerance (IPGTT) and insulin secretion tests (IPIST) were performed prior to the end of the feeding period. Vascular endothelial-dependent and independent dilatation were assessed ex vivo by isometric force measurements of aortic rings in response to phenylephrine, acetylcholine, and sodium nitroprusside. RESULTS: Weaning weights were greater in offspring from western-fed dams than control-fed dams. Control-fed offspring from western-fed dams had higher heart and kidney weights than those from control-fed dams. Control-fed offspring from exercised dams had higher blood glucose concentrations at IPGTT₃₀minutes than those from sedentary dams. Western-fed offspring from exercised dams had greater body weights, retroperitoneal fat weights, and Il10 mRNA in retroperitoneal adipose tissue, and lower blood glucose concentrations at IPGTT₉₀minutes than those from sedentary dams. Endothelium-dependent vasorelaxation of thoracic aortae was likely unaffected by maternal western diet or maternal exercise in control-fed and western-fed offspring. CONCLUSION: These findings suggest maternal exercise is beneficial in improving glucose homeostasis and adiposity in western-fed female offspring.
Impact of spin-orbit coupling on the Holstein polaron
Creators: name: Li, Zhou
name: Covaci, L.
name: Berciu, M.
name: Baillie, D.
name: Marsiglio, F.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We utilize an exact variational numerical procedure to calculate the ground state properties of a polaron in the presence of a Rashba-like spin orbit interaction. Our results corroborate with previous work performed with the Momentum Average approximation and with weak coupling perturbation theory. We find that spin orbit coupling increases the effective mass in the regime with weak electron phonon coupling, and decreases the effective mass in the intermediate and strong electron phonon coupling regime. Analytical strong coupling perturbation theory results confirm our numerical results in the small polaron regime. A large amount of spin orbit coupling can lead to a significant lowering of the polaron effective mass.
description: 10 pages, 7 figures
Lectures on principal bundles over projective varieties
Creators: name: Gomez, Tomas L.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 14D22

description: Lectures on the construction on the moduli space of principal bundles, given in the Mini-School on Moduli Spaces at the Banach center (Warsaw) 26-30 April 2005.
description: 21 pages
Direct numerical evaluation of multi-loop integrals without contour deformation
Creators: name: Pittau, Roberto
name: Webber, Bryan
Publisher: name: Apollo - University of Cambridge Repository
Year: 2022
Subjects: Regular Article - Theoretical Physics

description: Abstract: We propose a method for computing numerically integrals defined via iϵ deformations acting on single-pole singularities. We achieve this without an explicit analytic contour deformation. Our solution is then used to produce precise Monte Carlo estimates of multi-scale multi-loop integrals directly in Minkowski space. We corroborate the validity of our strategy by presenting several examples ranging from one to three loops. When used in connection with four-dimensional regularization techniques, our treatment can be extended to ultraviolet and infrared divergent integrals.
Spin interference effects in ring conductors subject to Rashba coupling
Creators: name: Frustaglia, Diego
name: Richter, Klaus
Publisher: name: Universität Regensburg
Year: 2004
Subjects: subject: 530 Physik
subject: 73.23.-b
subject: 03.65.Vf
subject: 72.10.-d
subject: 72.25.-b

description: Quantum interference effects in rings provide suitable means for controlling spin at mesoscopic scales. Here we apply such control mechanisms to coherent spin-dependent transport in one- and two-dimensional rings subject to Rashba spin-orbit coupling. We first study the spin-induced modulation of unpolarized currents as a function of the Rashba coupling strength. The results suggest the possibility of all-electrical spintronic devices. Moreover, we find signatures of Berry phases in the conductance previously unnoticed. Second, we show that the polarization direction of initially polarized, transmitted spins can be tuned via an additional small magnetic control flux. In particular, this enables to precisely reverse the polarization direction at half a flux quantum. We present full numerical calculations for realistic two-dimensional ballistic microstructures and explain our findings in a simple analytical model for one-dimensional rings.
Student nurses' views of participating in an intergenerational café with older people
Creators: name: TUOHY, DYMPNA
name: TUOHY, TERESA
name: GRAHAM, MARGARET
name: MC CARTHY, JANE
name: MURPHY, JILL
name: SHANAHAN, JACINTA
name: CASSIDY, IRENE
Publisher: name: University of Limerick
Year: 2023
Subjects: classificationCode: 42
subject: Health sciences
subject: FOS: Health sciences

description: BackgroundWithin the context of global ageing, older people will require health care during times in their later lives. As most nurses will care for older people across a variety of care settings, it is crucial that older people and nurses can work together in partnership. In preparation for this, it is important to develop intergenerational learning innovations for student nurses and older people. An online intergenerational discussion café was developed to provide an opportunity for older people and student nurses to meet and get to know each other.Objectives1) Evaluate the effectiveness of an intergenerational discussion café as a way of facilitating intergenerational learning, 2) Elicit participants' views on whether intergenerational learning had occurred.DesignEthically approved survey research.SettingsTertiary education institution.ParticipantsThird year student nurses (n = 50) across three BSc Nursing pre-registration degree programmes enrolled on a shared community care module.MethodsPost-café, student nurses were invited via email to voluntarily participate in the research and to complete an anonymous online survey. Questionnaire return implied consent. Fifty student nurses (n = 50) participated in the post café survey. Descriptive statistical analysis of Likert scale quantitative data and thematic analysis of open-ended questions was undertaken.ResultsParticipants reported that the intergenerational cafés were well organised, worked well and strongly agreed that the cafés were helpful in facilitating student nurses and older people to connect socially and share views. Results also showed that participants felt they got to know a lot about older people and that they were in many ways quite similar to older people.ConclusionsThis study provides valuable information on the use of intergenerational cafés as a means of facilitating intergenerational learning. Findings indicate that it was a positive learning experience for participants.
Localization of a pair of bound particles in a random potential
Creators: name: Turek, Marko
name: John, W.
Publisher: name: Universität Regensburg
Year: 2003
Subjects: subject: Disordered systems; Localization
subject: 530 Physik

description: We study the localization length {\it l$_{c}$} of a pair of two attractively bound particles moving in a one-dimensional random potential. We show in which way it depends on the interaction potential between the constituents of this composite particle. For a pair with many bound states {\it N} the localization length is proportional to {\it N}, independently of the form of the two particle interaction. For the case of two bound states, we present an exact solution for the corresponding Fokker–Planck equation and demonstrate that {\it l$_{c}$} depends sensitively on the shape of the interaction potential and the symmetry of the bound state wave functions.
The Nuclear Spectroscopic Telescope Array (NuSTAR)
Creators: name: Harrison, Fiona A.
name: Boggs, Steven
name: Christensen, Finn
name: Craig, William
name: Hailey, Charles
name: Stern, Daniel
name: Zhang, William
name: Angelini, Lorella
name: An, HongJun
name: Bhalereo, Varun
name: Brejnholt, Nicolai
name: Cominsky, Lynn
name: Cook, W. Rick
name: Doll, Melania
name: Giommi, Paolo
name: Grefenstette, Brian
name: Hornstrup, Allan
name: Kaspi, Victoria M.
name: Kim, Yunjin
name: Kitaguchi, Takao
name: Koglin, Jason
name: Liebe, Carl Christian
name: Madejski, Greg
name: Madsen, Kristin Kruse
name: Mao, Peter
name: Meier, David
name: Miyasaka, Hiromasa
name: Mori, Kaya
name: Perri, Matteo
name: Pivovaroff, Michael
name: Puccetti, Simonetta
name: Rana, Vikram
name: Zoglauer, Andreas
Publisher: name: arXiv
Year: 2010
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: The Nuclear Spectroscopic Telescope Array (NuSTAR) is a NASA Small Explorer mission that will carry the first focusing hard X-ray (5 -- 80 keV) telescope to orbit. NuSTAR will offer a factor 50 -- 100 sensitivity improvement compared to previous collimated or coded mask imagers that have operated in this energy band. In addition, NuSTAR provides sub-arcminute imaging with good spectral resolution over a 12-arcminute field of view. After launch, NuSTAR will carry out a two-year primary science mission that focuses on four key programs: studying the evolution of massive black holes through surveys carried out in fields with excellent multiwavelength coverage, understanding the population of compact objects and the nature of the massive black hole in the center of the Milky Way, constraining explosion dynamics and nucleosynthesis in supernovae, and probing the nature of particle acceleration in relativistic jets in active galactic nuclei. A number of additional observations will be included in the primary mission, and a guest observer program will be proposed for an extended mission to expand the range of scientific targets. The payload consists of two co-aligned depth-graded multilayer coated grazing incidence optics focused onto solid state CdZnTe pixel detectors. To be launched in early 2012 on a Pegasus rocket into a low-inclination Earth orbit. Data will be publicly available at GSFC's High Energy Astrophysics Science Archive Research Center (HEASARC) following validation at the science operations center located at Caltech.
description: 9 pages, 5 figures, to appear in Proceedings of the SPIE, Space Telescopes and Instrumentation 2010: Ultraviolet to Gamma Ray
Aharonov-Bohm physics with spin. II. Spin-flip effects in two-dimensional ballistic systems
Creators: name: Frustaglia, Diego
name: Hentschel, Martina
name: Richter, Klaus
Publisher: name: Universität Regensburg
Year: 2004
Subjects: subject: 530 Physik
subject: 73.23.2-b
subject: 03.65.Vf
subject: 72.10.2-d
subject: 72.25.2-b

description: We study spin effects in the magnetoconductance of ballistic mesoscopic systems subject to inhomogeneous magnetic fields. We present a numerical approach to the spin-dependent Landauer conductance which generalizes recursive Green-function techniques to the case with spin. Based on this method we address spin-flip effects in quantum transport of spin-polarized and spin-unpolarized electrons through quantum wires and various two-dimensional Aharonov-Bohm geometries. In particular, we investigate the range of validity of a spin-switch mechanism recently found which allows for controlling spins indirectly via Aharonov-Bohm fluxes. Our numerical results are compared to a transfer-matrix model for one-dimensional ring structures presented in the first paper [Hentschel et al., Phys. Rev. B, preceding paper, Phys. Rev. B 69, 155326 (2004)] of this series.
Modeling the spectral evolution of PWNe inside SNRs
Creators: name: Bucciantini, N.
name: Arons, J.
name: Amato, E.
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present a new model for the spectral evolution of Pulsar Wind Nebulae inside Supernova Remnants. The model couples the long-term dynamics of these systems, as derived in the 1-D approximation, with a 1-zone description of the spectral evolution of the emitting plasma. Our goal is to provide a simplified theoretical description that can be used as a tool to put constraints on unknown properties of PWN-SNR systems: a piece of work that is preliminary to any more accurate and sophisticated modeling. In the present paper we apply the newly developed model to a few objects of different ages and luminosities. We find that an injection spectrum in the form of a broken-power law gives a satisfactory description of the emission for all the systems we consider. More surprisingly, we also find that the intrinsic spectral break turns out to be at a similar energy for all sources, in spite of the differences mentioned above. We discuss the implications of our findings on the workings of pulsar magnetospheres, pair multiplicity and on the particle acceleration mechanism(s) that might be at work at the pulsar wind termination shock.
description: 20 Pages, 6 Figures, Submitted to MNRAS
Rate and characteristics of infection after transrectal prostate biopsy: a retrospective observational study
Creators: name: Forsvall, Andreas
name: Jönsson, Hannah
name: Wagenius, Magnus
name: Bratt, Ola
name: Linder, Adam
Publisher: name: Taylor & Francis
Year: 2021
Subjects: subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Biotechnology
subject: Cancer
subject: Science Policy
subject: 111714 Mental Health
subject: FOS: Health sciences
subject: 110309 Infectious Diseases
subject: 60506 Virology
subject: Computational Biology

description: The aim of this study was to assess the incidence of infection after transrectal prostate biopsy (TRbx). Secondary objectives were to describe infection characteristics, antibiotic resistance patterns, ICD-10 coding, and costs. TRbx carried out at the hospitals of Ängelholm and Helsingborg, Scania, Sweden, between October 2017 and March 2019, were identified based on the NOMESCO Classification of Surgical Procedures code for TRbx, TKE00. All patients received per oral antibiotic prophylaxis, usually 750 mg ciprofloxacin at biopsy. Other preventative measures were not used. Medical care within 30 days of the biopsy was evaluated through a manual retrospective medical chart review. Data on patient and infection characteristics were collected. The costs of infections causing hospitalization were estimated. After 36 (5.4%) of 670 biopsies, the patient developed post-biopsy infection within 30 days after TRbx. Twenty-six patients (3.9%) required hospitalization for an average of 6 days, at an estimated direct cost of USD 9174 (EUR 8031) per patient. Nine patients (1.3%) had a complicated infection leading to intensive care, multiple hospitalizations or emergency department visits. The inpatient care episodes for the 26 hospitalized patients were categorized with 15 different ICD-codes. In 6 episodes no ICD-code related to infection was used. In this study, we found an infection rate of 5.4% after TRbx; 3.9% of the patients were hospitalized for a post-TRbx infection and 1.3% had complicated infections. A specific ICD code for post-TRbx infections would facilitate evaluation and monitoring of this common, costly, and sometimes serious complication.
ОБУЧЕНИЕ МЕЖКУЛЬТУРНЫМ КОММУНИКАТИВНЫМ КОМПЕТЕНЦИЯМ НА ЗАНЯТИЯХ ПО ИНОСТРАННОМУ ЯЗЫКУ ПОСРЕДСТВОМ ОНОМАТОПЕИ
Creators: name: Сарвиноз Азамжонова Студентка 1 курса Узбекского государственного университета мировых языков Научный руководитель: старший преподаватель Зульфия Давронова
Publisher: name: Zenodo
Year: 2023

description: Данная статья посвящена изучению структуры и семантики звукоподражательных слов, а также особенностей их функционирования. Более того, представлена системная характеристика фонетических, лексико-семантических особенностей некоторых звукоподражательных слов.   
Ключевые слова: ономатопея, общеевропейские компетенции, говорение, письмо, повторение, запоминание, речевой и языковой материал.
Extending Electrical Resistivity Measurements in Micro-scratching of Silicon to Determine Thermal Conductivity of the Metallic Phase Si-II
Creators: name: Abdel-Aal, Hisham A.
name: Reyes, Ysai
name: Patten, John A.
name: Dong, Lei
Publisher: name: arXiv
Year: 2010
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Ductile Regime Machining of semiconductors (DRM) offers higher quality of the resulting surfaces. To optimize this process, it is required to understand the thermal kinetics of silicon metallization under pressure. Such understanding is not yet possible since the metallic phases of silicon aren't readily amenable to thermal characterization through direct measurements. This being the case, one has to rely on processing indirect measurement data to deduce refined estimates of the thermal transport properties of pressurized Silicon. A feasible measurement of this sort is the electrical resistivity, since its' variation during indentation and consider is often an indicator of the formation of the metallic silicon phase Si-II under the indenter. This paper, therefore, describes a procedure by which the average thermal conductivity of the metallic phase of silicon, Si-II is extracted from electrical resistivity measurements taken in real time. The procedure is based on teaming a temperature evaluation code to the resistivity measurements thus allowing the extraction of the conductivity as a function of temperature.