cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The Roots of real concepts: expressive talk and evolved learning processes
Creators: name: Mowat, William M.
Publisher: name: University of Calgary
Year: 1979
Subjects: subject: LB 1060 M67 1979 Microfiche
subject: Learning, Psychology of
subject: Concept learning
subject: High school students - Psychology
subject: Psycholinguistics

description: Bibliography: p. 259-273.
Interplay between Kondo tunneling and Rashba precession
Creators: name: Kikoin, Konstantin
name: Avishai, Yshai
Publisher: name: arXiv
Year: 2012
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The influence of Thomas - Rashba precession on the physics of Kondo tunneling through quantum dots is analyzed. It is shown that this precession is relevant only at finite magnetic fields. Thomas - Rashba precession results in peculiar anisotropy of the effective g-factor and initiates dephasing of the Kondo tunneling amplitude at low temperature, that is strongly dependent on the magnetic field.
description: 6.5 two column pages
Gapped spin liquid phase in the J1-J2 Heisenberg model by a Bosonic resonating valence-bond ansatz
Creators: name: Li, Tao
name: Becca, Federico
name: Hu, Wenjun
name: Sorella, Sandro
Publisher: name: arXiv
Year: 2012
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study the ground-state phase diagram of the spin-1/2 J1-J2 Heisenberg model on the square lattice with an accurate Bosonic resonating valence-bond (RVB) wave function. In contrast to the RVB ansatz based on Schwinger Fermions, the representation based on Schwinger Bosons, supplemented by a variational Monte Carlo technique enforcing the exact projection onto the physical subspace, is able to describe a fully gapped spin liquid in the strongly frustrated regime. In particular, a fully symmetric Z2 spin liquid is stable between two antiferromagnetic phases; a continuous transition at J2=0.4J1, when the Marshall sign rule begins to be essentially violated, and a first-order transition around J2=0.6J1 are present. Most importantly, the triplet gap is found to have a non-monotonic behavior, reaching a maximum around J2=0.51J1, when the lowest spinon excitation moves from the Γto the M point, i.e., k=(π,0).
description: 8 pages, 7 figures
Supernova remnants and candidates detected in the XMM-Newton M31 large survey
Creators: name: Sasaki, Manami
name: Pietsch, Wolfgang
name: Haberl, Frank
name: Hatzidimitriou, Despina
name: Stiele, Holger
name: Williams, Benjamin
name: Kong, Albert
name: Kolb, Ulrich
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present the analysis of supernova remnants (SNRs) and candidates in M31 identified in the XMM-Newton large programme survey of M31. SNRs are among the bright X-ray sources in a galaxy. They are good indicators of recent star formation activities of a galaxy and of the interstellar environment in which they evolve. By combining the X-ray data of sources in M31 with optical data as well as with optical and radio catalogues, we aim to compile a complete, revised list of SNRs emitting X-rays in M31 detected with XMM-Newton, study their luminosity and spatial distribution, and understand the X-ray spectrum of the brightest SNRs. We analysed the X-ray spectra of the twelve brightest SNRs and candidates using XMM-Newton data. The four brightest sources allowed us to perform a more detailed spectral analysis and the comparison of different models to describe their spectrum. For all M31 large programme sources we searched for optical counterparts on the Ha, [Sii], and [Oiii] images of the Local Group Galaxy Survey. We confirm 21 X-ray sources as counterparts of known SNRs. In addition, we identify five new X-ray sources as X-ray and optically emitting SNRs. Seventeen sources are no longer considered as SNR candidates. We have thus created a list of 26 X-ray SNRs and 20 candidates in M31 based on their X-ray, optical, and radio emission, which is the most recent complete list of X-ray SNRs in M31. The brightest SNRs have X-ray luminosities of up to 8 x 10^36 erg/s in the 0.35 - 2.0 keV band.
description: Accepted by AandA. 15 pages. Appendices will be published electronically only
FOSTERING PRESCHOOL TEACHERS’ READINESS TO USE DIGITAL TECHNOLOGIES IN EDUCATIONAL ROBOTICS
Creators: name: Prolygina, Natalya
name: Tsitavets, Tatsiana
Publisher: name: Материалы Международного психологического форума «Ребенок в цифровом мире»
Year: 2022
Subjects: ICT technologies
preschool education
teacher training
educational robotics
technical creativity

description: Abstract: Integration of ICT technologies and educational robotics into preschool education necessitates the emergence of new teacher training programs aimed at producing competent preschool educators who are ready to deliver high-level instruction to children. The objective of this paper is to describe methodology for the training of preschool educators to use digital technologies in educational robotics. The research relies on a comprehensive study of the literature, methods of theoretical induction and deduction, pedagogical modelling, empirical experimentation, and statistical data analysis (with 160 college students). The results of the research indicate that the methodically centered approach to training preschool educators is more efficient than the information-centered approach. The criteria for the readiness of future preschool educators to use digital technologies in educational robotics include the ability to harness children’s motivation for engineering and design activities, manage the process of technical creativity of the child, and evaluate the results of technical creativity of the child. The paper presents new curriculum and extra-curriculum activities for college students aimed to enhance the quality of the educational process in a preschool educational institution via modern software. It is concluded that preschool teachers are not always able to organize robotics classes and develop a child's engineering ability, even when they master programming and ICT technologies, and therefore special training for managing children’s technical creativity is required.
Theory of light amplification in active fishnet metamaterials
Creators: name: Hamm, Joachim M.
name: Wuestner, Sebastian
name: Tsakmakidis, Kosmas L.
name: Hess, Ortwin
Publisher: name: arXiv
Year: 2011
Subjects: subject: Optics (physics.optics)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: We establish a theory that traces light amplification in an active double-fishnet metamaterial back to its microscopic origins. Based on ab initio calculations of the light/plasmon fields we extract energy rates and conversion efficiencies associated with gain/loss channels directly from Poynting's theorem. We find that for the negative refactive index mode both radiative loss and gain outweigh resistive loss by more than a factor of two, opening a broad window of steady-state amplification (free of instabilities) accessible even when a gain reduction close to the metal is taken into account.
description: Physical Review Letters, in press
New methods in conformal partial wave analysis
Creators: name: Neumann, Christoph
name: Rehren, Karl-Henning
name: Wallenhorst, Lena
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We report on progress concerning the partial wave analysis of higher correlation functions in conformal quantum field theory.
description: 16 pages
A Study of written language development: an application of James Britton's theories of language development to the high school English class writing of three girls
Creators: name: Parbs, Ruth Ann
Publisher: name: University of Calgary
Year: 1974
Subjects: subject: LB 1631 P37 1974 Microfice
subject: English language - Study and teaching (Secondary)
subject: Britton, James N.

description: Bibliography: p. 116-118.
Model of a PT symmetric Bose-Einstein condensate in a delta-functions double well
Creators: name: Cartarius, Holger
name: Wunner, Günter
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: Quantum Gases (cond-mat.quant-gas)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: The observation of PT symmetry in a coupled optical wave guide system that involves a complex refractive index has been demonstrated impressively in the experiment by Rüter el al. (Nat. Phys. 6, 192, 2010). This is, however, only an optical analogue of a quantum system, and it would be highly desirable to observe the manifestation of PT symmetry and the resulting properties also in a real, experimentally accessible, quantum system. Following a suggestion by Klaiman et al. (Phys. Rev. Lett. 101, 080402, 2008), we investigate a PT symmetric arrangement of a Bose-Einstein condensate in a double well potential, where in one well cold atoms are injected while in the other particles are extracted from the condensate. We investigate, in particular, the effects of the nonlinearity in the Gross-Pitaevskii equation on the PT properties of the condensate. To study these effects we analyze a simple one-dimensional model system in which the condensate is placed into two PT symmetric delta-function traps. The analysis will serve as a useful guide for studies of the behaviour of Bose-Einstein condensates in realistic PT symmetric double wells.
description: 5 pages, 3 figures (one redundant figure removed), minor changes in the discussion
Supernova enhanced cosmic ray ionization and induced chemistry in a molecular cloud of W51C
Creators: name: Ceccarelli, C.
name: Hily-Blant, P.
name: Montmerle, T.
name: Dubus, G.
name: Gallant, Y.
name: Fiasson, A.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Cosmic rays pervade the Galaxy and are thought to be accelerated in supernova shocks. The interaction of cosmic rays with dense interstellar matter has two important effects: 1) high energy (>1 GeV) protons produce γ-rays by π0-meson decay; 2) low energy (< 1 GeV) cosmic rays (protons and electrons) ionize the gas. We present here new observations towards a molecular cloud close to the W51C supernova remnant and associated with a recently discovered TeV γ-ray source. Our observations show that the cloud ionization degree is highly enhanced, implying a cosmic ray ionization rate ~ 10-15 s-1, i.e. 100 times larger than the standard value in molecular clouds. This is consistent with the idea that the cloud is irradiated by an enhanced flux of freshly accelerated low-energy cosmic rays. In addition, the observed high cosmic ray ionization rate leads to an instability in the chemistry of the cloud, which keeps the electron fraction high, ~ 10-5, in a large fraction (Av \geq 6mag) of the cloud and low, ~ 10-7, in the interior. The two states have been predicted in the literature as high- and low-ionization phases (HIP and LIP). This is the observational evidence of their simultaneous presence in a cloud.
description: Accepted to be published in The Astrophysical Journal Letters
Experimental investigation and theoretical modeling of piezoelectric actuators used in fuel injectors
Creators: name: Senousy Youssef, Mohamed Salah
Publisher: name: University of British Columbia
Year: 2009

description: Piezoelectric stack actuators are increasingly used in micropositioning applications due to their precision and responsiveness. Advanced automotive fuel injectors have recently been developed that utilize multilayer piezoelectric actuators. Since these injectors must operate under high dynamical excitations at high temperatures, understanding their thermo-electro-mechanical performance under such operating conditions is crucial to their proper design. In this thesis, the effect on soft Lead Zirconate Titanate (PZT) piezoelectric actuators of different controlling parameters relevant to fuel injection is studied experimentally. These parameters include electric-field magnitude and frequency, driving-field rise time, DC offset, duty-cycle percentage, and ambient temperature. Soft PZT actuators generate a significant amount of heat when driven under high electric-field magnitudes and/or high frequency, both of which occur in fuel injectors. They also exhibit hysteretic nonlinear behavior when driven under high electric-field magnitudes. Self-heating and hysteretic nonlinearity are interconnected, and both are undesirable in applications that require precise positioning, such as fuel injection. Self-heating in PZT stacks is considered to be caused by ferroelectric hysteretic nonlinearity, originating from domain-switching. Theoretical studies of self-heating and domain-switching in PZT materials are developed in this thesis. An analytical self-heating model based on the first law of thermodynamics is presented that accounts for different parameters such as geometry, magnitude and frequency of applied electric field, duty-cycle percentage, and surrounding properties. It also directly relates self-heating in PZT actuators to displacement-electric field loss (displacement hysteresis), which is found to increase linearly with increased temperature. The model shows reasonable agreement with experimental results at low and high electric-field magnitudes. A novel domain-switching model for PZT materials is developed. The model is based on changes in potential energy, and accounts for the temperature effect on domain switching. It also accounts for full thermo-electro-mechanical coupling. Additionally, different energy levels are assumed for different domain-switching types. It is assumed that 180° switching is a two-step process caused by two 90° switching events. A finite element implementation of a thermo-piezoelectric continuum, based on the proposed switching model, is presented. The model shows good agreement with experimental results at different temperatures and loading conditions.
HOW TO CHARACTERIZE THE AUDIOVISUAL CONSUMPTION OF CHILDREN IN EARLY CHILDHOOD
Creators: name: Annia Cano Pérez
name: Leonard, Isa Rios
name: Idania De La Vega Hernández
Publisher: name: Материалы Международного психологического форума «Ребенок в цифровом мире»
Year: 2022
Subjects: methodological package
characterize
audiovisual consumption
early childhood children

description: The paper presents a methodological package for the characterization of the audiovisual consumption of children in early childhood. It is the result of a group of researchers from a sectoral project (Ministry of Education in Cuba) entitled “Promotion of an audiovisual culture for children and families in early childhood”. This idea arose due to the rapid development and diversification of screens, in order to overcome limitations of previous studies. Data obtained through theoretical studies carried out in various countries has demonstrated an increase in consumption habits following the emergence of accessibility to multiple screens, an ever decreasing age at which children begin audiovisual consumption, as well as increased screen presence in educational environments. Many of these past studies have used descriptive research methods, or methods in which the researcher presupposes the participants’ possible responses. Though these approaches are valid, as they provide information regarding the cultural phenomenon in question, they are highly dependent upon individuals that may have certain biases. National studies have previously been restricted to quantitative explorations that account for the possession of goods and consumption habits. These limitations have skewed the view of the role of consumption in society and have failed to consider a deeper analysis of its essential function. Another limitation is that many of these international and national studies generally investigate subjects aged seven and above, emitting key stages of early childhood.
Enhancement of fusion rates due to quantum effects in the particles momentum distribution in nonideal media
Creators: name: Fisch, N. J.
name: Gladush, M. G.
name: Petrushevich, Yu. V.
name: Quarati, Piero
name: Starostin, A. N.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: This study concerns a situation when measurements of the nonresonant cross-section of nuclear reactions appear highly dependent on the environment in which the particles interact. An appealing example discussed in the paper is the interaction of a deuteron beam with a target of deuterated metal Ta. In these experiments, the reaction cross section for d(d,p)t was shown to be orders of magnitude greater than what the conventional model predicts for the low-energy particles. In this paper we take into account the influence of quantum effects due to the Heisenberg uncertainty principle for particles in a non-ideal medium elastically interacting with the medium particles. In order to calculate the nuclear reaction rate in the non-ideal environment we apply both the Monte Carlo technique and approximate analytical calculation of the Feynman diagram using nonrelativistic kinetic Green's functions in the medium which correspond to the generalized energy and momentum distribution functions of interacting particles. We show a possibility to reduce the 12-fold integral corresponding to this diagram to a fivefold integral. This can significantly speed up the computation and control accuracy. Our calculations show that quantum effects significantly influence reaction rates such as p +7Be, 3He +4He, p +7Li, and 12C +12C. The new reaction rates may be much higher than the classical ones for the interior of the Sun and supernova stars. The possibility to observe the theoretical predictions under laboratory conditions is discussed.
Untersuchung zum Manövrierverhalten sehr breiter Schiffe
Creators: name: Oltmann, Peter
Publisher: name: TUHH Universitätsbibliothek
Year: 1981
Subjects: classificationCode: 52.00
subject: Maschinenbau, Energietechnik, Fertigungstechnik: Allgemeines

description: Untersuchung zum Manövrierverhalten sehr breiter Schiffe
HOME-BASED LEARNING AND HYBRID LEARNING PROGRAMME FOR PRE-SCHOOLERS
Creators: name: Yee, Jeanne
name: Gan, Gerry
Publisher: name: Материалы Международного психологического форума «Ребенок в цифровом мире»
Year: 2022
Subjects: Home-Based Learning
Hybrid Learning Program

description: Abstract: This presentation highlights our Kindergarten's efforts towards our goal of providing quality education and care for our children during the challenges and opportunities posed by COVID-19. 48 We will be sharing some of the observations and learning points we have experienced as we implemented and conducted a nearly 20-week-long Home-Based Learning Program and a 15-week Hybrid Learning Program.
Migration from the United Kingdom to Australia, 1860-1890
Creators: name: Marshall, George C.
Publisher: name: University of Calgary
Year: 1973
Subjects: subject: JV 9185 B7 M35 1973 Microfiche
subject: Australia - Emigration and immigration
subject: Great Britain - Emigration and immigration
subject: Australia - Economic conditions

description: Bibliography: p. 67-72.
Recent Progress in the Theoretical Studies on the Behavior of Ships in a Seeway
Creators: name: Weinblum, Georg
Publisher: name: TUHH Universitätsbibliothek
Year: 1954
Subjects: classificationCode: 52.00
subject: Maschinenbau, Energietechnik, Fertigungstechnik: Allgemeines

description: Recent progress in the theoretical studies on the behavior of ships in a seeway
Prototyping scalable digital signal processing systems for radio astronomy using dataflow models
Creators: name: Sane, Nimish
name: Ford, John
name: Harris, Andrew I.
name: Bhattacharyya, Shuvra S.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: There is a growing trend toward using high-level tools for design and implementation of radio astronomy digital signal processing (DSP) systems. Such tools, for example, those from the Collaboration for Astronomy Signal Processing and Electronics Research (CASPER), are usually platform-specific, and lack high-level, platform-independent, portable, scalable application specifications. This limits the designer's ability to experiment with designs at a high-level of abstraction and early in the development cycle. We address some of these issues using a model-based design approach employing dataflow models. We demonstrate this approach by applying it to the design of a tunable digital downconverter (TDD) used for narrow-bandwidth spectroscopy. Our design is targeted toward an FPGA platform, called the Interconnect Break-out Board (IBOB), that is available from the CASPER. We use the term TDD to refer to a digital downconverter for which the decmation factor and center frequency can be reconfigured without the need for regenerating the hardware code. Such a design is currently not available in the CASPER DSP library. The work presented in this paper focuses on two aspects. Firstly, we introduce and demonstrate a dataflow-based design approach using the dataflow interchange format (DIF) tool for high-level application specification, and we integrate this approach with the CASPER tool flow. Secondly, we explore the trade-off between the flexibility of TDD designs and the low hardware cost of fixed-configuration digital downconverter (FDD) designs that use the available CASPER DSP library. We further explore this trade-off in the context of a two-stage downconversion scheme employing a combination of TDD or FDD designs.
description: Accepted for publication in Radio Science
INTERACTIVE SANDBOX AS A FOUNDATION FOR THE DEVELOPMENT OF THE CREATIVE POTENTIAL OF A PRESCHOOLER
Creators: name: Rudneva, Ilona
Publisher: name: Материалы Международного психологического форума «Ребенок в цифровом мире»
Year: 2022
Subjects: preschool
mental activity
creative
fine motor skills

description: Abstract: The purpose of the study is to theoretically substantiate and experimentally test the pedagogical conditions for the development of the creative potential of preschool children by means of 34 an interactive sandbox. The object of research is the process of developing the creative potential of preschool children. The subject of the study is the pedagogical conditions for the development of the creative potential of the personality of preschoolers by means of an interactive sandbox. Task: To determine the pedagogical conditions for the development of children's creative potential using information and communication technologies. The priority tasks all over the world are the training of highly qualified specialists with a high level of creative and mental activity of thinking. The modern educational environment is limited in technologies that create conditions for the development of a child's creative thinking. The interactive sandbox is a combination of sand and augmented reality. The child is not wholly immersed in the virtual world and interacts with it using natural material. Developing fine motor skills and tactile perception. The child becomes a creator. By changing the level of the height of the sand, they model the landscape in the sand space: rivers, lakes, mountains, volcanoes. The child goes from an idea to the use of auxiliary materials, with the help of which they create their own story. As a result, children develop initiative, creativity, speech skills, teamwork, the ability to think outside the box and create stories, and the ability to change the plot on the fly. According to the criterion of "Involuntary creativity", at the beginning of the school year, preschoolers mainly had a low and average level of development. 48% of children were found to have a low level, suggesting that it is difficult for children to make changes to the plot. 50% of children turned out to be at the average level. After the implementation of pedagogical conditions for the development of creative potential with an interactive sandbox, children developed the ability to change the plot of the game on the go. Thus, 52% of children agreed to the proposal to change something, reaching the average level. And 48% of preschoolers at the end of the school year showed the ability to change the plot on the go, showing ingenuity.
Magnetic Structure of Sunspots
Creators: name: Borrero, J. M.
name: Ichimoto, K.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: In this review we give an overview about the current state-of-knowledge of the magnetic field in sunspots from an observational point of view. We start by offering a brief description of tools that are most commonly employed to infer the magnetic field in the solar atmosphere with emphasis in the photosphere of sunspots. We then address separately the global and local magnetic structure of sunspots, focusing on the implications of the current observations for the different sunspots models, energy transport mechanisms, extrapolations of the magnetic field towards the Corona and other issues.
description: Published version (including high resolution figures): http://www.livingreviews.org/lrsp-2011-4
title: Smoothed-particle-hydrodynamics simulation of port hydrodynamic problems
title: Smoothed-Particle-Hydrodynamics Simulationen hydrodynamischer Problemstellungen in Häfen
titleType: AlternativeTitle
Creators: name: Ulrich, Christian
Publisher: name: TUHH Universitätsbibliothek
Year: 2013
Subjects: subject: Fluid/Boden/Struktur-Interaktion
subject: Propellermodel
subject: Bugstrahlrudermodell
subject: Bodenmodelle
subject: computational fluid dynamics
subject: fluid/structure/soil-interaction
subject: multiphysics simulation
subject: meshfree method
subject: marine engineering
subject: Smoothed Particle Hydrodynamics
subject: Numerische Strömungssimulation
subject: Kolk
subject: Hafenbau
subject: Schiffbau
subject: Hydrodynamik

description: Gegenstand der Dissertation ist die Entwicklung eines numerischen Verfahrens auf Basis der gitterfreien Smoothed-Particle-Hydrodynamics (SPH) Methode zur Simulation komplexer hydrodynamischer Fragestellungen in Häfen mit Interaktion zwischen Schiffen, Hafenbauwerken, Boden und Wasser. Entsprechende Stoffmodelle wurden entwickelt, implementiert und validiert. Im Anwendungsfokus liegt die von Schiffspropellern und Querstrahlrudern induzierte Kolkbildung nahe der Kaimauer. Das entwickelte Verfahren lässt sich weiterhin auf eine Vielzahl von Fragestellungen aus dem Gebiet der maritimen Technik anwenden.
description: The thesis reports on the development of a numerical procedure based on the meshfree Smoothed-Particle-Hydrodynamics (SPH) approach for the simulation of complex port hydrodynamic problems including the interaction between ships, harbour facilities, water and soil. Corresponding constitutive models have been derived, implemented and validated. The regarded applications focus on scouring close to quay walls induced by active ship manoeuvring and propulsion devices. The developed procedure can further be applied to a wide range of problems from the field of marine and offshore engineering.
Welfare dependency and alienation: a Marxian analysis
Creators: name: Ternowetsky, Gordon William
Publisher: name: University of Calgary
Year: 1972
Subjects: subject: HM 291 T45 1972
subject: Alienation (Social Psychology)
subject: Welfare economics
subject: Marx, Karl, 1818-1883
subject: Public welfare - Winnipeg
subject: Public welfare - Canada

description: Bibliography: p. 177-186.
Idealistic and realistic occupational aspirations and their discrepancy: the positive and negative case
Creators: name: Allen, Sandra Paulette
Publisher: name: University of Calgary
Year: 1972
Subjects: subject: BF 698.9 O3 A54 1972
subject: Personality and occupation
subject: Occupations
subject: Occupational aptitude tests

description: Bibliography: p. 96-100.
Multi-wavelength study of the Be/X-ray binary MXB 0656-072
Creators: name: Yan, Jingzhi
name: Heras, Juan Antonio Zurita
name: Chaty, Sylvain
name: Li, Hui
name: Liu, Qingzhong
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present and analyze the optical photometric and spectroscopic data of the Be/X-ray binary MXB 0656-072 from 2006 to 2009. A 101.2-day orbital period is found, for the first time, from the present public X-ray data(Swift/BAT and RXTE/ASM). The anti-correlation between the H$α$ emission and the $UBV$ brightness of MXB 0656$-$072 during our 2007 observations indicates that a mass ejection event took place in the system. After the mass ejection, a low-density region might develop around the Oe star. With the outward motion of the circumstellar disk, the outer part of the disk interacted with the neutron star around its periastron passage and a series of the X-ray outbursts were triggered between MJD 54350 and MJD 54850. The PCA--HEXTE spectra during the 2007-2008 X-ray outbursts could be well fitted by a cut-off power law with low energy absorption, together with an iron line around 6.4 keV, and a broad cyclotron resonance feature around 30 keV. The same variability of the soft and hard X-ray colors in 2.3-21 keV indicated that there were no overall changes in the spectral shape during the X-ray outbursts, which might be only connected with the changes of the mass-accretion rate onto the neutron star.
description: 27pages, 11figures, accepted for publication in ApJ
Noncovalent Immobilization of Electrocatalysts on Carbon Electrodes via a Pyrenyl Ligand
Creators: name: Gupta, Ayush
Publisher: name: California Institute of Technology
Year: 2016
Subjects: Chemistry
pyrene surface catalyst electrochemistry

description: There are many problems that need to be overcome if solar energy is to be viable on a global scale. Photons must be harvested and stored in a usable to allow efficient use of energy throughout the day. The functionalization of electrode surfaces with molecular catalysts is an attractive route for assembling (photo)electrochemical devices that convert renewable energy into chemical fuels. This work focuses on one method of noncovalently attaching molecular catalysts to graphitic surfaces.
The first part describes the synthesis of a pyrene-appended bipyridine ligand that serves as the linker between the catalysts and the surface. Using this ligand, a rhodium proton-reduction catalyst and a rhenium CO2-reduction catalyst were synthesized in order to study the electrochemistry of the surface-attached species. Electrochemical and spectroscopic analysis confirm catalyst immobilization and electrocatalytically active assemblies. Bulk electrolysis of the surface-attached complexes confirm catalytic turnover formation of H2 for the rhodium complex and CO for the rhenium complex.
The second part describes three new complexes utilizing the same pyrene-appended bipyridine ligand. These are [Ru(P)(4,4’-dimethyl-2,2’-bipyridine)2]Cl2, [Cp*Ir(P)Cl]Cl, and [Mn(P)(CO)3Br]. Once again, spectroscopic and electrochemical analyses confirmed successful immobilization of these complexes on high surface area carbon electrodes. The iridium complex was found to be unstable with respect to redox cycling due to ligand exchange. The ruthenium complex exhibited very high stability over long periods of redox cycling. The manganese complex was found to catalytically produce CO during bulk electrolysis.
INTERNET GAMING AND ADDICTION IN NEPAL
Creators: name: Subba, Usha Kiran
Publisher: name: Материалы Международного психологического форума «Ребенок в цифровом мире»
Year: 2022
Subjects: Internet
gaming
gaming disorder

description: Abstract: The Internet is now an integral and inescapable part of many people’s daily lives; they turn to it to send messages, read news, conduct business and much more. Recent scientific reports, however, have begun to focus on the preoccupation some people develop with certain aspects of the internet, particularly online games. The “gamers” play compulsively, excluding other interests, and their persistent and recurrent online activity results in clinically significant impairment or distress. People with this condition endanger their academic/professional functioning due to the amount of time they spend playing. They experience symptoms of withdrawal when kept from gaming. In late 2017, the World Health Organization (WHO) announced that in the upcoming edition (11th Revision) of the International Classification of Diseases* (ICD), gaming disorder would be identified as a new disorder. Gaming prompts a neurological response that influences feelings of pleasure and reward, and the result, in the extreme, is manifested as addictive behavior. Further research will determine if the same patterns of excessive online gaming are detected using the proposed criteria. At this time, the criteria for this condition are limited to internet gaming and do not include general use of the Internet, online gambling, or social media. Whether internet gaming should be classified as an addiction/mental disorder is the subject of much debate and a growing body of research.
[RILEM Week Kyoto 2022] Bottom-up modeling of ion diffusivity from two-scale pore networks
Creators: name: Limtong, Pakpoom
name: Patel, Ravi A.
name: Takahashi, Yuya
name: Ishida, Tetsuya
Publisher: name: Zenodo
Year: 2023
Subjects: Concrete
Modeling
Durability
Microstructure
Imaging
Diffusion

description: This poster received the outstanding poster award from the RILEM Week Kyoto 2022.
A vanishing theorem for operators in Fock space
Creators: name: Hasler, David
name: Herbst, Ira
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We consider the bosonic Fock space over the Hilbert space of transversal vector fields in three dimensions. This space carries a canonical representation of the group of rotations. For a certain class of operators in Fock space we show that rotation invariance implies the absence of terms which either create or annihilate only a single particle. We outline an application of this result in an operator theoretic renormalization analysis of Hamilton operators, which occur in non-relativistic qed.
description: 14 pages
KINEMATIC CHARACTERISTICS OF MOVEMENT ON A TOUCHSCREEN REPRESENTATION OF A VIRTUAL OBJECT AS PREDICTORS OF ITS MENTAL IMAGE IN PRESCHOOLERS
Creators: name: Krylova, Svetlana
name: Vodyakha, Yuliya
Publisher: name: Материалы Международного психологического форума «Ребенок в цифровом мире»
Year: 2022
Subjects: virtual object
touchscreen
mental image
kinematic characteristics

description: Abstract: This research aims to find objective correlatives of mental image characteristics of a virtual object in preschoolers using computer applications. It addresses the caveats of a common approach 32 utilized to study children’s perception. Our study relies on Leontiev’s activity theory framework regarding the active role of the mental image in the regulation of actions, and on the “mental image action more developed mental image” scheme, according to which task execution is modulated by the mental image of the context (Smirnov S.D., 1994). 18 children (9 boys, 9 girls) from 3.58 to 4.58 years old (Mage = 4,16 years, SD = 0,38) participated. They executed the virtual task “place a cube on a shelf” using a touchscreen. The linear coordinates of the cube’s center of gravity were recorded every 0.01 seconds. Each participant completed three trials: the first two trials served as a basis for the formation of a mental image of the moving object, expected to regulate the execution of the task during the third trial. Additionally, we assessed the children’s perception of a virtual cube’s weight with a nonverbal weight task (Kloos H., Amazeen E.L., 2002). The virtual cube’s weight was identified as “light” by 14 participants, and as “heavy” by 4 participants. Cube kinematic characteristics from the third trial were compared between the “light” and the “heavy” groups. Median value of the initial acceleration was 205.9 mm/s2 and 22.7 mm/s2 in the “heavy” and “light” group, respectively. Acceleration peaked at 0.15 s and 0.25 s in the “heavy” and “light” group, respectively. The collected data has significant inter-individual variability. To validate the attribution of the results to the difference in anticipation of participants of the virtual object’s “weight”, the control of an additional variable “maturation of motor control” is necessary.
Description of dipole strength in heavy nuclei in conformity with their quadrupole degrees of freedom
Creators: name: Grosse, Eckart
name: Junghans, Arnd R.
name: Massarczyk, Ralph
name: Schwengner, Ronald
name: Schramm, Georg
Publisher: name: arXiv
Year: 2011
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: In conformity to new findings about the widespread occurrence of triaxiality arguments are given in favor of a description of the giant dipole resonance in heavy nuclei by the sum of three Lorentzians. This TLO parameterization allows a strict use of resonance widths Γ in accordance to the theoretically founded power law relation to the resonance energy. No additional variation of Γ with the photon energy and no violation of the sum rule are necessary to obtain a good agreement to nuclear photo-effect, photon scattering and radiative capture data. Photon strength other than E1 has a small effect, but the influence of the level density on photon emission probabilities needs further investigation.
description: Presented at the 3rd International Workshop on Compound Nuclear Reactions and Related Topics at Prague, 2011, to be published via the EPJ Web of Conferences
JUMPING OUT OF THE MIND: CHILDREN’S RESPONSE TO ‘LIVING IN THE COMPUTER SIMULATION’
Creators: name: Subbotsky, Eugene
Publisher: name: Материалы Международного психологического форума «Ребенок в цифровом мире»
Year: 2022
Subjects: computer simulation
imagination
perception

description: Abstract: Relevance: With the progress of digital technologies, there appears to have arisen the philosophical argument that we live in a computer simulation and human consciousness is nothing but a headset that plunges our mind into simulated reality. The corollary of this provocative theory is that there must be a supreme programmer out there who can produce a computer technology sufficiently advanced to create a person and make them believe that they are a real individual with free will. Purpose: Accordingly, the purpose of the study was to examine the extent to which children are able to accept that such a supreme programmer can really exist out there. Research methods: The study was in the form of an interview. In order to refer to the supreme programmer concept in a manner accessible to children, the term 'Almighty Wizard' was used. Sample: Russian children in Moscow, and British children in Lancaster, aged 4, 5, 6, 7, 9 and 11 years. Main results: The interview included three stages. The first stage examined whether children were ready to acknowledge the existence of the Almighty Wizard in the domain of the imagination (fairy tale and imaginary play). The aim of the second and third stages was to determine whether the children thought that the wizard was able to move from the domain of the imagination into the perceived world. 59 Altogether, the results of this interview showed that almost all the children refused to admit that the Almighty Wizard could exist outside their imagination. Conclusion: Most children of all age groups in Russia and the UK strongly resisted the idea that they might live in a world of computer simulation.
Jet-driving protostars identified from infrared observations of the Carina Nebula complex
Creators: name: Ohlendorf, Henrike
name: Preibisch, Thomas
name: Gaczkowski, Benjamin
name: Ratzka, Thorsten
name: Grellmann, Rebekka
name: McLeod, Anna F.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Aims: Jets are excellent signposts for very young embedded protostars, so we want to identify jet-driving protostars as a tracer of the currently forming generation of stars in the Carina Nebula, which is one of the most massive galactic star-forming regions and which is characterised by particularly high levels of massive-star feedback on the surrounding clouds. Methods: We used archive data to construct large (> 2 deg x 2 deg) Spitzer IRAC mosaics of the Carina Nebula and performed a spatially complete search for objects with excesses in the 4.5 micron band, typical of shock-excited molecular hydrogen emission. We also identified the mid-infrared point sources that are the likely drivers of previously discovered Herbig-Haro jets and molecular hydrogen emission line objects. We combined the Spitzer photometry with our recent Herschel far-infrared data to construct the spectral energy distributions, and used the Robitaille radiative-transfer modelling tool to infer the properties of the objects. Results: The radiative-transfer modelling suggests that the jet sources are protostars with masses between ~1 M_sol and ~10 M_sol that are surrounded by circumstellar disks and embedded in circumstellar envelopes. Conclusions: The estimated protostar masses < 10 M_sol suggest that the current star-formation activity in the Carina Nebula is restricted to low- and intermediate-mass stars. More optical than infrared jets can be observed, indicating that star formation predominantly takes place close to the surfaces of clouds.
description: Accepted for publication in Astronomy & Astrophysics (16 pages, 7 figures). A high quality preprint is available at http://www.usm.uni-muenchen.de/people/preibisch/publications.html
Charge exchange and ionisation in N$^{7+}$, N$^{6+}$, C$^{6+}$ - H($n=1, 2$) collisions studied systematically by theoretical approaches
Creators: name: Igenbergs, Katharin
name: Schweinzer, Josef
name: Veiter, Alexander
name: Perneczky, Lukas
name: Frühwirth, Edwin
name: Wallerberger, Markus
name: Olson, Ronald E.
name: Aumayr, Friedrich
Publisher: name: arXiv
Year: 2011
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: The introduction of gases like nitrogen or neon for cooling the edge region of magnetically confined fusion plasmas has triggered a renewed interest in state selective cross sections necessary for plasma diagnostics by means of charge exchange recombination spectroscopy. To improve the quality of spectroscopic data analysis, charge exchange and ionisation cross sections for N$^{7+}$ + H($n=1,2$) have been calculated using two different theoretical approaches, namely the atomic-orbital close-coupling method and the classical trajectory Monte Carlo method. Total and state resolved charge exchange cross sections are analysed in detail. In the second part, we compare two collision systems involving equally charged ions, C$^{6+}$ and N$^{6+}$ on atomic hydrogen. The analysis of the data lead to the conclusion that deviations between these two impurity ions are practically negligible. This finding is very helpful when calculating cross sections for collision systems with heavier not completely stripped impurity ions.
description: 21 pages, 10 figures, 6 data tables
Essays on nominal rigidities, financial constraints and transfers
Creators: name: Poon, Doris Sum Yee
Publisher: name: University of British Columbia
Year: 2009

description: One principal research in macroeconomics is concerned with the importance of nominal rigidities. This dissertation applies nominal rigidities in closed- and open-economy models to study issues on firms’ pricing decisions, optimal monetary policy in a financially constrained economy, and the choice of exchange rate regime in the presence of transfer problem. Chapter 1 presents empirical evidence for price and wage stickiness, and the development of models with nominal rigidities in macroeconomics and international finance. Chapter 2 incorporates state-dependent pricing in a closed-economy model to explain the asymmetric responses of output and prices to monetary shocks. The model focuses on the effects of strategic complementarity and substitutability in firms’ pricing decisions, as well as the mixed strategies used by an individual firm. The strategic interactions among firms’ pricing decisions lead to asymmetric response of prices and output to monetary shocks. The model implies asymmetries in positive versus negative monetary shocks, and the asymmetric responses are affected by the degree of real rigidity in marginal cost, the magnitude of price-adjusting costs and the market power of an individual firm. Chapter 3 studies the optimal monetary policy of a small open economy with nominal rigidities and exchange-rate sensitive collateral constraints. This model attempts to explain the observed monetary policy behaviour of emerging markets. The model implies pro-cyclical optimal monetary policy when the collateral constraint binds, and an economy with large external shocks that may favour a fixed exchange rate, which are consistent with the observed features of monetary policy used by emerging markets. The last chapter studies the transfer problem using a two-country DSGE model with nominal rigidities. The model compares the effects of a transfer shock under flexible and sticky wages, as well as under fixed and floating exchange rate regimes. The results of this model are consistent with the conventional wisdom in international macroeconomics with nominal rigidities, which suggests that a flexible exchange rate can help reduce internal instability after some negative shocks via exchange rate ad justment. However, the welfare analysis of this model implies the donor country is better off to maintain the gold standard instead of going to a floating exchange rate, even with nominal rigidities.