cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Selective Separation of 4,4’-Methylenedianiline, Isophoronediamine and 2,4-Toluenediamine from Enzymatic Hydrolysis Solutions of Polyurethane
Creators: name: Eberz, Jörg
name: Doeker, Moritz
name: Ackermann, Yannic S.
name: Schaffeld, Dominik
name: Wierckx, Nick
name: Jupke, Andreas
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Biochemistry
subject: Space Science
subject: Microbiology
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Pharmacology
subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Ecology
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Plant Biology

description: The recycling of plastics such as polyurethane (PU) is a current challenge. The continuously increasing production volume and additionally growing end-of-life streams increase the urgency for solutions. Conventional recycling methods such as mechanical and chemical recycling are only economically and/or ecologically suitable to a limited extent. The three-step approach consisting of enzymatic PU decomposition, separation of amines (4,4’-methylenedianiline (MDA), isophoronediamine (IPDA), 2,4-toluenediamine (TDA)) and fermentation of the residual stream is a promising recycling concept. In this study, extraction methods for the separation of MDA and IPDA from an aqueous solution at neutral pH are developed. In addition, the influence of relevant PU hydrolysate components on the amine extraction is investigated. The results show that MDA can be efficiently separated using solvent extraction of 1-octanol. For IPDA separation, a reactive extraction with oleic acid as reactant is developed. The application of these two extraction methods to TDA shows extraction efficiencies of 52% to 86%. The other PU hydrolysate components adipic acid and selected salts have only a minor influence on the extraction efficiency. The diols ethylene glycol and 1,4-butanediol influence the equilibrium pH of IPDA extraction, raising it to higher values. For MDA, no influence of other PU hydrolysate components on the extraction efficiency can be observed. Since amines can have an inhibitory effect on microorganisms, toxicity experiments were carried out to determine the tolerable residual concentration of amines in the raffinate to avoid fermentation inhibition. Growth experiments with Pseudomonas putida KT240 show that MDA has an inhibitory effect at concentrations near the solubility limit, whereas IPDA does not affect growth.
Discovery of the thallium, lead, bismuth, and polonium isotopes
Creators: name: Fry, C.
name: Thoennessen, M.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Currently, forty-two thallium, forty-two lead, forty-one bismuth, and forty-two polonium isotopes have so far been observed; the discovery of these isotopes is discussed. For each isotope a brief summary of the first refereed publication, including the production and identification method, is presented.
description: to be published in At. Data Nucl. Data Tables
Rigorose Fehlerschranken für das Elektronenstrukturproblem
Creators: name: Ohlhus, Kai Torben
Publisher: name: TUHH Universitätsbibliothek
Year: 2019
Subjects: subject: Optimierung
subject: Elektronenstruktur
subject: Verifikation
classificationCode: 600
subject: Technik

description: Die vorliegende Doktorarbeit behandelt die Berechnung rigoroser Fehlerschranken für konische Optimierungsprobleme, einer Spezialform der konvexen Optimierung. Der Anwendungsschwerpunkt ist die Berechnung der Elektronenstruktur, insbesondere deren Grundzustandsenergie. Dies ist bis heute eine schwierig lösbare Problemstellung der Quantenchemie und kann als konisches Optimierungsproblem relaxiert werden. Es werden rigorose untere Fehlerschranken für das Elektronenstrukturproblem hergeleitet, welche alle Rundungsfehler miteinbeziehen und mit vernachlässigbarem Speicher- und Zeitaufwand für eine Vielzahl von Molekülen berechnet werden.
description: This thesis deals with the computation of rigorous error bounds for conic optimization problems, a special case of convex optimization. The focus of application is electronic structure calculation, especially the ground state energy. To this day it is a difficult problem of quantum chemistry, that can be relaxed to a conic optimization problem. Rigorous lower error bounds for the electronic structure problem are derived, that take all rounding errors into account and are computed for several molecules with negligible memory and time effort.
Design of optimal and suboptimal, scaler, time-invariant, Wiener filters and Kalman regulators
Creators: name: Altenhof, Terrence George
Publisher: name: University of Calgary
Year: 1973
Subjects: subject: TK 7872 F5 A46 1973 Microfilm
subject: Digital filters (Mathematics)
subject: Control theory
subject: Kalman filtering
subject: Wiener filters

description: Bibliography: p. 126-134.
Signatures of asymmetric and inelastic tunneling on the spin torque bias dependence
Creators: name: Manchon, A.
name: Zhang, S.
name: Lee, K. -J.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The influence of structural asymmetries (barrier height and exchange splitting), as well as inelastic scattering (magnons and phonons) on the bias dependence of the spin transfer torque in a magnetic tunnel junction is studied theoretically using the free electron model. We show that they modify the "conventional" bias dependence of the spin transfer torque, together with the bias dependence of the conductance. In particular, both structural asymmetries and bulk (inelastic) scattering add {\em antisymmetric} terms to the perpendicular torque ($\propto V$ and $\propto j_e|V|$), while the interfacial inelastic scattering conserves the junction symmetry and only produces {\em symmetric} terms ($\propto |V|^n$, $n\in\mathbb{N}$). The analysis of spin torque and conductance measurements displays a signature revealing the origin (asymmetry or inelastic scattering) of the discrepancy.
RELATIONSHIP BETWEEN THE USE OF DIGITAL DEVICES AND THE DEVELOPMENT OF THE IMAGINATION OF A PRESCHOOLER
Creators: name: Denisenkova, Nataliya
name: Taruntaev, Pavel
Publisher: name: Материалы Международного психологического форума «Ребенок в цифровом мире»
Year: 2022
Subjects: digital socialization
non-verbal imagination
digital devices
screen time

description: Abstract: The impact of digital socialization on the development of children occupies a significant place in modern research. Our goal was to study the relationship between the use of digital devices and the development of the imagination of a preschooler. We assumed that the level of development of non-verbal imagination in older preschoolers who have 2 hours or more of screen time per day would be lower than in children who have less than 1 hour of screen time per day. To assess active (using applications, video games) and passive (watching video products) screen time of older preschoolers, a questionnaire by M. Bortsova and S. Nekrasov was used: “Regulations on the use of gadgets by a child”. To determine the level of development of non-verbal imagination, the technique of O. Dyachenko "Dorisovyvanie" was used. The sample consisted of 189 preschool children aged 5-7 attending kindergartens in Moscow and their parents. Children were divided into three groups according to the level of imagination (low, medium and high). Performance levels were factors in a one-way analysis of variance to compare children's screen time. Children with a low level of imaginative development significantly differed [F(2,236) = 6.25, p = 0.001] in terms of passive screen time (M = 11.2; SD = 5.5) from children with an average (M = 8.2; SD = 5.2) and a high level of imagination development (M = 8.7; SD = 5.9). In addition, these children significantly differed [F(2,235) = 11.22, p = 0.001] from children with a high and medium level of imagination development in terms of active screen time (M = 8.4; SD = 5.8): from groups of children with a level (M =4.7; SD = 5.3) and high (M = 5; SD = 4.8). Consequently, the hypothesis was confirmed, the level of development of the imagination is associated with screen time.
A Multiple choice test on ratios for determining Piagetian developmental levels
Creators: name: Onslow, Barry A.
Publisher: name: University of Calgary
Year: 1976
Subjects: subject: BF 431 O58 1976 Microfiche
subject: Intelligence tests
subject: Child study
subject: Educational psychology
subject: Psychology, Comparative
subject: Piaget, Jean, 1896-1980

description: Bibliography: p. 55-58.
RELATIONSHIP BETWEEN THE USE OF SOCIAL MEDIA AND BODILY SELF ESTEEM AS SEXTING PRACTICES PREDICTORS AMONG 14 TO 18 YEARS OLD ADOLESCENTS IN BARRANQUILLA CITY
Creators: name: Gisell De La Rosa Gutierrez
name: Cervantes, Claudia Reyes
Publisher: name: Материалы Международного психологического форума «Ребенок в цифровом мире»
Year: 2022
Subjects: adolescents
sexting
body self-esteem
social networks
affective relationships
body image
social use
body satisfaction

description: social media and bodily self-esteem as predictors of the sexting practice among 14-18 years old adolescents living in Barranquilla city. An associative strategy and empirical-analytical based study with a transversal predictive design was implemented. The participants were 405 adolescents: 39.5% (n=160) were men and 60.5% (n=245) were women, with an average age of 16.1 years (sd=1.4). 3 instruments were applied: Bodily Self Esteem Scale(BSES, Peris & Maganto, 2016), Internet and Social Media Adolescent-Addiction Risk Scale (ISM-ARS, Peris, Maganto & Garaigordobil, 2018) and Sexting Scale (Peris & Maganto, 2016). The results showed significant scores on the addiction-symptom variable which was higher among over 16 years old adolescents in comparison with the ones that were between 14 and 16 years old. The geek trait variable showed differences between sexes, significantly greater among women than men. Meanwhile, age and socioeconomic stratum showed no significant difference. On the other hand, the physical attraction variable showed a direct relationship with erotic sexting and the sexting global scale. Lastly, the social-use variable had greater predictive weight, alongside physical attraction, predicting sexting practices at 39%. In conclusion, the greater the use of social media and the greater the body satisfaction, the greater the tendency towards sexting practices; meaning that, adolescent who feels most satisfied with their body make greater use of social media to share photos not only with sexual or erotic content multimedia but also of an explicit sexual nature.
Graphene morphology regulated by nanowires patterned in parallel on a substrate surface
Creators: name: Zhang, Zhao
name: Li, Teng
Publisher: name: arXiv
Year: 2011
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The graphene morphology regulated by nanowires patterned in parallel on a substrate surface is quantitatively determined using energy minimization. The regulated graphene morphology is shown to be governed by the nanowire diameter, the nanowire spacing and the interfacial bonding energies between the graphene and the underlying nanowires and substrate. We demonstrate two representative regulated graphene morphologies and determine critical values of the nanowire spacing, nanowire diameter and interfacial bonding energies at which graphene switches between the two representative morphologies. Interestingly, we identify a rule-of-thumb formula that correlates the critical nanowire spacing, the critical interfacial bonding energies and the nanowire diameter in quite well agreement with the full-scale simulation results. Results from the present study offer guidelines in nano-structural design to achieve desired graphene morphology via regulation with a resolution approaching the atomic feature size of graphene.
description: 26 pages, 4 figures
Windkanalversuche mit Überwasserschiffen- Fährschiffe, Fahrgastschiff, Tragflächenboot, Schlepper und Hecktrawler
Creators: name: Wagner, Bernd
Publisher: name: TUHH Universitätsbibliothek
Year: 1968
Subjects: classificationCode: 52.00
subject: Maschinenbau, Energietechnik, Fertigungstechnik: Allgemeines

description: Windkanalversuche mit Überwasserschiffen- Fährschiffe, Fahrgastschiff, Tragflächenboot, Schlepper und Hecktrawler
Two-dimensional incommensurate magnetic fluctuations in Sr$_2$(Ru$_{0.99}$Ti$_{0.01}$)O$_4$
Creators: name: Iida, K.
name: Lee, J.
name: Stone, M. B.
name: Kofu, M.
name: Yoshida, Y.
name: Lee, S. -H.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We investigate the imaginary part of the wave vector dependent dynamic spin susceptibility in Sr$_2$(Ru$_{0.99}$Ti$_{0.01}$)O$_4$ as a function of temperature using neutron scattering. At T=5 K, two-dimensional incommensurate (IC) magnetic fluctuations are clearly observed around $\mathbf{Q}_\text{c}=(0.3,0.3,L)$ up to approximately 60 meV energy transfer. We find that the IC excitations disperse to ridges around the $(π,π)$ point. Below 50 K, the energy and temperature dependent excitations are well described by the phenomenological response function for a Fermi liquid system with a characteristic energy of 4.0(1) meV. Although the wave vector dependence of the IC magnetic fluctuations in Sr$_2$(Ru$_{0.99}$Ti$_{0.01}$)O$_4$ is similar to that in the Fermi liquid state of the parent compound, Sr$_2$RuO$_4$, the magnetic fluctuations are clearly suppressed by the Ti-doping.
description: 5 pages, 4 figures
Molecular abundances in the inner layers of IRC +10216
Creators: name: Agundez, M.
name: Fonfria, J. P.
name: Cernicharo, J.
name: Kahane, C.
name: Daniel, F.
name: Guelin, M.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Observations towards IRC +10216 of CS, SiO, SiS, NaCl, KCl, AlCl, AlF, and NaCN have been carried out with the IRAM 30-m telescope in the 80-357.5 GHz frequency range. A large number of rotational transitions covering a wide range of energy levels, including highly excited vibrational states, are detected in emission and serve to trace different regions of the envelope. Radiative transfer calculations based on the LVG formalism have been performed to derive molecular abundances from the innermost out to the outer layers. The excitation calculations include infrared pumping to excited vibrational states and inelastic collisions, for which up-to-date rate coefficients for rotational and, in some cases, ro-vibrational transitions are used. We find that in the inner layers CS, SiO, and SiS have abundances relative to H$_2$ of 4e-6, 1.8e-7, and 3e-6, respectively, and that CS and SiS have significant lower abundances in the outer envelope, which implies that they actively contribute to the formation of dust. Moreover, in the inner layers, the amount of sulfur and silicon in gas phase molecules is only 27 % for S and 5.6 % for Si, implying that these elements have already condensed onto grains, most likely in the form of MgS and SiC. Metal-bearing molecules lock up a relatively small fraction of metals, although our results indicate that NaCl, KCl, AlCl, AlF, and NaCN, despite their refractory character, are not significantly depleted in the cold outer layers. In these regions a few percent of the metals Na, K, and Al survive in the gas phase, either in atomic or molecular form, and are therefore available to participate in the gas phase chemistry in the outer envelope.
description: Accepted for publication in A&A
Search for the standard model and a fermiophobic Higgs boson in diphoton final states
Creators: name: D0 Collaboration
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We present a search for the standard model Higgs boson and a fermiophobic Higgs boson in the diphoton final states based on 8.2 fb-1 of ppbar collisions collected with the D0 detector at the Fermilab Tevatron Collider. No excess of data above background predictions is observed and upper limits at the 95% C.L. on the cross section multiplied by the branching fraction are set which are the most restrictive to date. A fermiophobic Higgs boson with a mass below 112.9 GeV is excluded at the 95% C.L.
description: 12 pages, 21 figures, submitted to PRL
RURAL MATERNITY PRACTICES IN THE MODERN CITY
Creators: name: Golubeva, Lyubov
name: Kupriyanova, Sofya
Publisher: name: Материалы Международного психологического форума «Ребенок в цифровом мире»
Year: 2022
Subjects: practice of childbirth
folklore of maternity
body techniques
daily routine practices

description: Abstract: Many of the practices associated with caring for a child, which are experienced by modern city dwellers, are rooted in the peasant tradition. For example, in the city, parents still rock their children to sleep and sing lullabies to them, hide their children's faces on social networks, fearing the evil eye, or while washing they say the words "water off the goose ...", unsuspecting of any conspiracy. Our report is based on materials from the archive "Russian everyday life" (daytodaydata.ru) (ANO "Proppovsky Center") and the thematically organized folklore archive of St. Petersburg State University. For the analysis, interviews with women were selected from the archives. Their years of birth fell between 1900–1980. This time frame allowed one to see the changes that have taken place within the family structure, assisted birth practices and births, and child care. However, many private practices recorded at the beginning of the 20th century are still preserved today and broadcast to the next generation. Using the example of such practices, we looked at what remains unchanged as an experience that determines the worldview of modern Russians.
Investigation of personality, motivation, reading ability, and audio-tutorial or lecture treatments as predictors of achievement in college mathematics
Creators: name: MacNab, David Frederick
Publisher: name: University of Calgary
Year: 1971
Subjects: subject: QA 11 M23 1971 Microfilm
subject: Mathematics - Study and teaching
subject: Academic achievement
subject: Students - Psychology

description: Bibliography: p. 40-43.
Imperfect variables : the combined problem of missing data and mismeasured variables with application to generalized linear models
Creators: name: Regier, Michael David
Publisher: name: University of British Columbia
Year: 2009

description: Observational studies predicated on the secondary use of information from administrative and health databases often encounter the problem of missing and mismeasured data. Although there is much methodological literature pertaining to each problem in isolation, there is a scant body of literature addressing both problems in tandem. I investigate the effect of missing and mismeasured covariates on parameter estimation from a binary logistic regression model and propose a likelihood based method to adjust for the combined data deficiencies. Two simulation studies are used to understand the effect of data imperfection on parameter estimation and to evaluate the utility of a likelihood based adjustment. When missing and mismeasured data occurred for separate covariates, I found that the parameter estimate associated with the mismeasured portion was biased and that the parameter estimate for the missing data aspect may be biased under both missing at random and non-ignorable missing at random assumptions. A Monte Carlo Expectation-Maximization adjustment reduced the magnitude of the bias, but a trade-off was observed. Bias reduction for the mismeasured covariate was achieved by increasing the bias associated with the others. When both problems affected a single covariate, the parameter estimate for the imperfect covariate was biased. Additionally, the parameter estimates for the other covariates were also biased. The Monte Carlo Expectation-Maximization adjustment often corrected the bias, but the bias trade-off amongst the covariates was observed. For both simulation studies, I observed a potential dissimilarity across missing data mechanisms. A substantive data set was investigated and by using the second simulation study, which was structurally similar, I could provide reasonable conclusions about the nature of the estimates. Also, I could suggest avenues of research which would potentially minimize expenditures for additional high quality data. I conclude that the problem of imperfection may be addressed through standard statistical methodology, but that the known effects of missing data or measurement error may not manifest as expected when more general data imperfections are considered.
Josephson supercurrent through a topological insulator surface state
Creators: name: Veldhorst, M.
name: Snelder, M.
name: Hoek, M.
name: Gang, T.
name: Wang, X. L.
name: Guduru, V. K.
name: Zeitler, U.
name: Wiel, W. G. v. d.
name: Golubov, A. A.
name: Hilgenkamp, H.
name: Brinkman, A.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Topological insulators are characterized by an insulating bulk with a finite band gap and conducting edge or surface states, where charge carriers are protected against backscattering. These states give rise to the quantum spin Hall effect without an external magnetic field, where electrons with opposite spins have opposite momentum at a given edge. The surface energy spectrum of a threedimensional topological insulator is made up by an odd number of Dirac cones with the spin locked to the momentum. The long-sought yet elusive Majorana fermion is predicted to arise from a combination of a superconductor and a topological insulator. An essential step in the hunt for this emergent particle is the unequivocal observation of supercurrent in a topological phase. Here, we present the first measurement of a Josephson supercurrent through a topological insulator. Direct evidence for Josephson supercurrents in superconductor (Nb) - topological insulator (Bi2Te3) - superconductor e-beam fabricated junctions is provided by the observation of clear Shapiro steps under microwave irradiation, and a Fraunhofer-type dependence of the critical current on magnetic field. The dependence of the critical current on temperature and length shows that the junctions are in the ballistic limit. Shubnikov-de Haas oscillations in magnetic fields up to 30 T reveal a topologically non-trivial two-dimensional surface state. We argue that the ballistic Josephson current is hosted by this surface state despite the fact that the normal state transport is dominated by diffusive bulk conductivity. The lateral Nb-Bi2Te3-Nb junctions hence provide prospects for the realization of devices supporting Majorana fermions.
RELATIONSHIP OF PSYCHOLOGICAL WELL-BEING WITH REGULATORY AND MOTIVATIONAL CHARACTERISTICS OF STUDENTS IN SECONDARY SCHOOL
Creators: name: Tsyganov, Igor
Publisher: name: Материалы Международного психологического форума «Ребенок в цифровом мире»
Year: 2022
Subjects: psychological well-being
conscious self-regulation
motivation
younger adolescents

description: Abstract: Relevance. Understanding the factors ensuring the stability of psychological well-being (PWB) will provide teachers and psychologists with a useful tool. Purpose of the study. The study investigated the differences in the relationship of psychological well-being with regulatory and motivational characteristics in students with different dynamics of psychological well-being in fifth and sixth grades. Research methods and sample. Longitudinal data of 155 secondary school pupils (Moscow and Kaluga) aged 10–12 years (M = 11 ± 0.28) were analyzed. According to two 5th and 6th grader surveys, we identified groups with decreasing, increasing, and stable PWB. Research methods: "Well-Being Manifestation Measure Scale" (modification: V.I. Morosanova et al., 2018), "The Self-Regulation Profile of Learning Activity Questionnaire (SRPLAQ)" (V.I. Morosanova, I.N. Bondarenko, 2018), "Academic Motivation Scale – School (AMS-S)" (T.O. Gordeeva et al., 2017). The academic performance indicator: the average score of success in learning Russian and mathematics. Main results. The decrease in PWB is associated with a weakening of the links between PWB and students' motivational and regulatory characteristics. In comparison with the 5th grade, in the 6th grade, conscious self-regulation ceases to be a regulatory resource for both PWB and academic performance. PWB stability is ensured by the strong relationship between self-regulation and PWB and the "inclusion" of all regulatory and motivational factors in this process. The increase in PWB is primarily associated with the actualization of personal development: an accentuated and stable relationship between PWB and self-esteem motivation was revealed. Conclusion. The study results allow us to obtain new data on changes occurring in the system of PWB and academic performance predictors during the beginning of secondary school education.
Revealing the state space of turbulent pipe flow by symmetry reduction
Creators: name: Willis, Ashley P.
name: Cvitanovic, Predrag
name: Avila, Marc
Publisher: name: arXiv
Year: 2012
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Symmetry reduction by the method of slices is applied to pipe flow in order to quotient the stream-wise translation and azimuthal rotation symmetries of turbulent flow states. Within the symmetry-reduced state space, all travelling wave solutions reduce to equilibria, and all relative periodic orbits reduce to periodic orbits. Projections of these solutions and their unstable manifolds from their $\infty$-dimensional symmetry-reduced state space onto suitably chosen 2- or 3-dimensional subspaces reveal their interrelations and the role they play in organising turbulence in wall-bounded shear flows. Visualisations of the flow within the slice and its linearisation at equilibria enable us to trace out the unstable manifolds, determine close recurrences, identify connections between different travelling wave solutions, and find, for the first time for pipe flows, relative periodic orbits that are embedded within the chaotic attractor, which capture turbulent dynamics at transitional Reynolds numbers.
description: 24 pages, 12 figures
Stationary states of a PT-symmetric two-mode Bose-Einstein condensate
Creators: name: Graefe, Eva-Maria
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: The understanding of nonlinear PT-symmetric quantum systems, arising for example in the theory of Bose-Einstein condensates in PT-symmetric potentials, is widely based on numerical investigations, and little is known about generic features induced by the interplay of PT-symmetry and nonlinearity. To gain deeper insights it is important to have analytically solvable toy-models at hand. In the present paper the stationary states of a simple toy-model of a PT-symmetric system are investigated. The model can be interpreted as a simple description of a Bose-Einstein condensate in a PT-symmetric double well trap in a two-mode approximation. The eigenvalues and eigenstates of the system can be explicitly calculated in a straight forward manner; the resulting structures resemble those that have recently been found numerically for a more realistic PT-symmetric double delta potential. In addition, a continuation of the system is introduced that allows an interpretation in terms of a simple linear matrix model.
description: 13 pages, 4 figures
Essays on executive compensation
Creators: name: Wu, Shuo
Publisher: name: University of British Columbia
Year: 2009

description: This thesis consists of two studies in the area of executive compensation. The first examines the effect of boards of directors’ characteristics on the degree of compensation efficiency with respect to the use of private information. I predict and find that boards’ competence both in information acquisition and in monitoring influence the extent to which boards use private performance measures in CEO compensation. Specifically, smaller and more independent boards with their CEOs as the board chair are more efficient in exploiting private performance measures. Furthermore, the better a board balances its information role with its monitoring role, the more efficient it is in exploiting private performance measures. No asymmetry is found in rewarding and punishing CEOs based on private information. The second study investigates the mechanism to inflate the value of executive stock options after Sarbanes-Oxley Act Section 403 (SOX 403), which requires that executive option grants be reported to the SEC within two business days following the grant day. As this requirement largely restricts backdating of executive option grants, I examine whether firms that previously backdated resort to alternative strategies after SOX. Using firms that were relatively free from backdating before SOX as a control group, I find that in the post-SOX period previous backdating firms exhibit a significantly larger return reversal around option grant dates, suggesting some sort of opportunistic behavior is still going on in these firms. Furthermore, I find that post-SOX option grant filings of previous backdating firms are as timely as those of the non-backdating control group, and that the large return reversals are associated with a pattern consistent with strategic timing of grants and disclosures; that is, a larger proportion of option grants are issued right after bad news (before good news) than right before bad news (after good news). These findings suggest that firms that previously backdated engage in strategic timing as an alternative mechanism to lower the grant-date stock price in the post-SOX period.
A Paper-and-pencil alternative to clinical interviews: for assessing mathematical reasoning in adolescents
Creators: name: Tyrell, L. Eileen
Publisher: name: University of Calgary
Year: 1976
Subjects: subject: BF 724.3 R4 T97 1976 Microfiche
subject: Adolescent psychology
subject: Reasoning (Psychology) - Testing
subject: Logic, Symbolic and mathematical
subject: Ability - Testing

description: Bibliography: p. 55-58.
A multi-wavelength survey of NGC\,6752: X-ray counterparts, two new dwarf novae, and a core-collapsed radial profile
Creators: name: Thomson, G. S.
name: Knigge, C.
name: Dieball, A.
name: Maccarone, T. J.
name: Dolphin, A.
name: Zurek, D.
name: Long, K. S.
name: Shara, M.
name: Sarajedini, A.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present the results of a multi-wavelength (FUV to I-band) survey of the stellar populations of the globular cluster NGC 6752, using STIS, ACS and WFC3 on board the Hubble Space Telescope. We have confirmed that two previously identified CV candidates are, in fact, dwarf novae which underwent outbursts during our observations. We have also identified previously unknown optical counterparts to two X-ray sources. We estimate the position of the centre of the cluster, and show that the stellar density profile is not well described by a single King model, indicating that this cluster is in a core-collapsed or post-core collapse phase. The colour-magnitude diagram shows a well-populated horizontal branch, numerous blue stragglers and white dwarfs (WDs), as well as 87 sources in the gap region where we expect to find WD - main sequence binaries, including cataclysmic variables (CVs). The X-ray sources and WD binary systems are the most centrally concentrated populations, with dynamically estimated characteristic masses >1.1Msun and >0.8Msun, respectively.
description: 17 pages, 11 figures, accepted for publication in MNRAS
Comparison of an algebraic and a graphical method for teaching grade eight problem solving
Creators: name: Davis, Marie L.
Publisher: name: University of Calgary
Year: 1977
Subjects: subject: QA 135.5 D378 1977 Microfiche
subject: Mathematics - Study and teaching (Elementary)
subject: Algebra - Study and teaching (Elementary)
subject: Problem solving - Graphic methods

description: Bibliography: p. 72-74.
RUSSIAN BILINGUAL CHILDREN: VOCABULARY RICHNESS IN L1 AND L2 AND THEORY OF MIND
Creators: name: Kyuchukov, Hristo
name: Ushakova, Oksana
name: Yashina, Valentina
Publisher: name: Материалы Международного психологического форума «Ребенок в цифровом мире»
Year: 2022
Subjects: bilingual children
vocabulary
theory of mind

description: Abstract: The present study aims to demonstrate the connection between the vocabulary richness of Russian bilingual children in their mother tongue and in their second language and their theory of mind development. For the purpose of the study 80 children aged 4-6 years were tested . 40 were from Tatarstan and 40 from Bashkortostan, with 20 children aged 4-5 years and 20 children aged 5-6 years. In both countries, the children lived in big cities and attend kindergartens. The children were tested for vocabulary richness using a specially designed test in which half of the vocabulary was in the mother tongue and half of it was in Russian as their second language. Alongside this, the children had a language test (wh-complements task). The children were also tested on their theory of mind using the false belief test. The results showed that the Bashkir children performed better in all the tests and the paper discusses the factors influencing these results.
title: IT-Sicherheitsarchitektur zur Containerüberwachung
title: MASC -- Monitoring and Security of Containers
titleType: AlternativeTitle
Creators: name: Lauf, Jens Ove
Publisher: name: TUHH Universitätsbibliothek
Year: 2008
Subjects: subject: IT-Sicherheit, Containerüberwachung, Sensornetzwerke, SPKI/SDSI, AMANDA, Delegierung, XACML delegation, AKEP2, Logistik, Terrorismusbekämpfung
subject: IT Security, Transport container monitoring, sensor networks, SPKI/SDSI, AMANDA, delegation, XACML delegation, AKEP2, logsitics, terrorism
subject: Container
subject: Sensor-Array
subject: Logistik
subject: Sicherheit
subject: Computersicherheit
subject: Hafen

description: MASC beschreibt eine Containerüberwachungsarchitektur, die Vertraulichkeit und Integrität des Informationsflusses sicherstellt. Ein Baustein ist das entworfene MASC-ST, ein dynamisches und authentifiziertes Schlüsseletablierungsprotokoll. Die Zugriffskontrolle wird vom MASC-IS mit einem delegierungsfähigen Ansatz geregelt. Die ganzheitliche Sicherheitsarchitektur ist speziell den Anforderungen des Logistikwesens angepasst.
description: This thesis proposes a security architecture for a container monitoring application which aims at increasing transport quality by damage detection. Furthermore, border control authorities get the possibility to better control the import of containers. A secure tunnel protocol between the sensor nodes in the container and an internet remote station is developed that protects confidentiality and integrity of sensor data in an energy efficient way. Another key building block of the architecture is a delegable access control mechanism, which ensures that only correct parties can access the database, which keeps records of the container transport.
A rotating molecular disk toward IRAS 18162-2048, the exciting source of HH 80-81
Creators: name: Fernández-López, Manuel
name: Girart, Josep M.
name: Curiel, Salvador
name: Gómez, Yolanda
name: Ho, Paul T. P.
name: Patel, Nimesh
Publisher: name: arXiv
Year: 2011
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present several molecular line emission arcsec and subarcsec observations obtained with the Submillimeter Array (SMA) in the direction of the massive protostar IRAS 18162-2048, the exciting source of HH 80-81. The data clearly indicates the presence of a compact (radius~425-850 AU) SO2 structure, enveloping the more compact (radius~150 AU) 1.4 millimeter dust emission (reported in a previous paper). The emission spatially coincides with the position of the prominent thermal radio jet which terminates at the HH 80-81 and HH 80N Herbig-Haro objects. Furthermore, the molecular emission is elongated in the direction perpendicular to the axis of the thermal radio jet, suggesting a disk-like structure. We derive a total dynamic mass (disk-like structure and protostar) of 11-15 msun. The SO2 spectral line data also allow us to constrain the structure temperature between 120-160 K and the volume density > 2x10^9 cm-3. We also find that such a rotating flattened system could be unstable due to gravitational disturbances. The data from C17O line emission show a dense core within this star-forming region. Additionally, the H2CO and the SO emissions appear clumpy and trace the disk-like structure, a possible interaction between a molecular core and the outflows, and in part, the cavity walls excavated by the thermal radio jet.
description: 13 pages,11 figures. Accepted in the AJ, 07-15-2011
A survey of the problems of teacher supply and teacher quality in the Federation of Nigeria and the Federated State of West Cameroon
Creators: name: Kajih, Tansam John
Publisher: name: University of Calgary
Year: 1971
Subjects: subject: LA 1611 N55 K33 1971 Microfilm
subject: Education - Nigeria
subject: Education - Cameroon
subject: Teachers - Supply and demand

description: Bibliography: p. 141-149.
Electronic, Optical, Mechanical and Li-Ion Storage Properties of Novel Benzotrithiophene-Based Graphdiyne Monolayers Explored by First Principles and Machine Learning
Creators: name: Mortazavi, Bohayra
name: Shojaei, Fazel
name: Shahrokhi, Masoud
name: Rabczuk, Timon
name: Shapeev, Alexander V.
name: Zhuang, Xiaoying
Publisher: name: Basel : MDPI
Year: 2022
Subjects: subject: graphdiyne
subject: machine learning
subject: mechanical
subject: optical
subject: semiconductors
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: Recently, benzotrithiophene graphdiyne (BTT-GDY), a novel two-dimensional (2D) carbon-based material, was grown via a bottom-up synthesis strategy. Using the BTT-GDY lattice and by replacing the S atoms with N, NH and O, we designed three novel GDY lattices, which we named BTHP-, BTP- and BTF-GDY, respectively. Next, we explored structural, electronic, mechanical, optical, photocatalytic and Li-ion storage properties, as well as carrier mobilities, of novel GDY monolayers. Phonon dispersion relations, mechanical and failure behavior were explored using the machine learning interatomic potentials (MLIPs). The obtained HSE06 results reveal that BTX-GDYs (X = P, F, T) are direct gap semiconductors with band gaps in the range of 2.49–2.65 eV, whereas the BTHP-GDY shows a narrow indirect band gap of 0.06 eV. With appropriate band offsets, good carrier mobilities and a strong capability for the absorption of visible and ultraviolet range of light, BTF- and BTT-GDYs were predicted to be promising candidates for overall photocatalytic water splitting. The BTHP-GDY nanosheet, noticeably, was found to yield an ultrahigh Li-ion storage capacity of over 2400 mAh/g. The obtained findings provide a comprehensive vision of the critical physical properties of the novel BTT-based GDY nanosheets and highlight their potential for applications in nanoelectronics and energy storage and conversion systems.
title: Amnionmembran-Transplantation: Indikationen – Gewebe – Techniken
Creators: name: Meller, Daniel
Publisher: name: German Medical Science GMS Publishing House
Year: 2016
Subjects: subject: 610 Medical sciences; Medicine

description: Die Amnionmembrantransplantation (AMT) hat in der operativen Augenheilkunde eine lange Tradition und eine Renaissance seit Einführung moderner Konservierungsmethoden erlebt. Die Amnionmembran (AM) wird nach den Arbeitsrichtlinien (Gute Fachliche Praxis) zur Gewinnung und Herstellung von humaner,[zum vollständigen Text gelangen Sie über die oben angegebene URL]
description: 29. Internationaler Kongress der Deutschen Ophthalmochirurgen
Feasibility study of a guided discovery approach to conic sections using a translucent mirror
Creators: name: Brindley, Selwyn R. W.
Publisher: name: University of Calgary
Year: 1974
Subjects: subject: QA 462 B75 1974 Microfiche
subject: Geometry - Study and teaching
subject: Conic sections
subject: Parabola

description: Bibliography: p. 77-79.
Recursive formulation of the multiconfigurational time-dependent Hartree method for fermions, bosons and mixtures thereof in terms of one-body density operators
Creators: name: Alon, Ofir E.
name: Streltsov, Alexej I.
name: Sakmann, Kaspar
name: Lode, Axel U. J.
name: Grond, Julian
name: Cederbaum, Lorenz S.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The multiconfigurational time-dependent Hartree method (MCTDH) [Chem. Phys. Lett. {\bf 165}, 73 (1990); J. Chem. Phys. {\bf 97}, 3199 (1992)] is celebrating nowadays entering its third decade of tackling numerically-exactly a broad range of correlated multi-dimensional non-equilibrium quantum dynamical systems. Taking in recent years particles' statistics explicitly into account, within the MCTDH for fermions (MCTDHF) and for bosons (MCTDHB), has opened up further opportunities to treat larger systems of interacting identical particles, primarily in laser-atom and cold-atom physics. With the increase of experimental capabilities to simultaneously trap mixtures of two, three, and possibly even multiple kinds of interacting composite identical particles together, we set up the stage in the present work and specify the MCTDH method for such cases. Explicitly, the MCTDH method for systems with three kinds of identical particles interacting via all combinations of two- and three-body forces is presented, and the resulting equations-of-motion are briefly discussed. All four possible mixtures of fermions and bosons are presented in a unified manner. Particular attention is paid to represent the coefficients' part of the equations-of-motion in a compact recursive form in terms of one-body density operators only. The recursion utilizes the recently proposed Combinadic-based mapping for fermionic and bosonic operators in Fock space [Phys. Rev. A {\bf 81}, 022124 (2010)] and successfully applied and implemented within MCTDHB. Our work sheds new light on the representation of the coefficients' part in MCTDHF and MCTDHB without resorting to the matrix elements of the many-body Hamiltonian with respect to the time-dependent configurations. It suggests a recipe for efficient implementation of the schemes derived here for mixtures which is suitable for parallelization.
description: 43 pages
title: 23 vs. 27 g PPV
Creators: name: Signer, Theo
Publisher: name: German Medical Science GMS Publishing House
Year: 2016
Subjects: subject: 610 Medical sciences; Medicine

description: Ziel dieses Referates ist es innerhalb der Small Gauge Systeme das zurzeit am häufigsten angewandte (23G) mit dem kleinsten im klinischen Alltag zur Anwendung kommenden System (27G) zu vergleichen.    Im Jahre 2014 wurden in der Schweiz 68.1% aller Vitrektomien mittels eines 23G Systems durchgeführt.[zum vollständigen Text gelangen Sie über die oben angegebene URL]
description: 29. Internationaler Kongress der Deutschen Ophthalmochirurgen
Model-based identification and testing of appropriate strategies to minimize N2O emissions from biofilm deammonification
Creators: name: Freyschmidt, A.
name: Beier, M.
Publisher: name: London : IWA Publishing
Year: 2022
Subjects: subject: aeration strategies
subject: control algorithms
subject: denitrification
subject: GHG Emissions
subject: Dewey Decimal Classification::600 | Technik::690 | Hausbau, Bauhandwerk

description: Based on a one-year pilot plant operation of a two-step biofilm nitritation-anammox pilot plant, N2O mitigation strategies were identified by applying a newly developed biofilm modeling approach. Due to adapted plant operation, the N2O emission could be diminished by 75% (8.8% → 2.3% of NH4-Noxidized_AOB). The results (measurement and simulation) confirm the huge importance of denitrification as an N2O source or N2O sink, depending on the boundary conditions. A significant reduction of N2O emissions could only be achieved with a one-step deammonification system, which is related to low nitrite and HNO2 concentrations. Increased oxygen concentrations in the bulk phase are not related to decreased emissions. N2O formation by ammonium-oxidizing bacteria (AOB) just shifts deeper into the biofilm; zones with low oxygen concentrations are not avoidable in biofilm systems. Low oxygen concentrations in the bulk phase, however, result in a reduction of the total net N2O formation due to increased activity of heterotrophic bacteria directly at the source of N2O formation (outer biofilm layer). For the model-based identification of mitigation strategies, the standard modeling approaches for biofilms were expanded by including the factor-based N2O formation and emission approach. The new model 'Biofilm/N2OISAH' was successfully validated using data from pilot-scale measurement campaigns. Altogether, the investigation confirms that the employed digital model can strongly support the development of N2O mitigation strategies without the need for specialized measurement inside the biofilm.
SCREEN CONSUMPTION, PERCEPTION AND FAMILY MEDIATION DURING CONFINEMENT DUE TO THE COVID-19 PANDEMIC
Creators: name: Yaritza García-Ortiz
name: Yurianely Machado-Machado
name: Castillo, Evelyn Fernández
Publisher: name: Материалы Международного психологического форума «Ребенок в цифровом мире»
Year: 2022
Subjects: screens
family mediation
confinement

description: Abstract: The increased use of screens during confinement due to the Covid-19 pandemic has been a cause for concern among professionals. Objective: To describe screen consumption in primary school children in the city of Santa Clara during confinement due to Covid-19 and the perception and family mediation of such consumption. Methodology: An exploratory online study was conducted using a survey on the Google Forms platform. The research was carried out from April to June 2021 and the sample consisted of 127 parents of school-age children living in the city of Santa Clara, Villa Clara, Cuba. Results: 92.1% of school children used between 2 and 4 screens during this period of confinement; with a daily frequency of 92.9% and 61.4% between 3 and 6 hours. 48% of parents considered that the use of screens increased considerably during confinement and 41.7% recognized that it increased somewhat. 54.3% of parents perceived between one and three effects on the child as a result of consumption. Among the most noted affectations were restlessness and difficulties in falling asleep and following orders. Restrictive mediation and shared mediation were the most used by parents to deal with increased screen consumption. Conclusions: Even when parents perceive affectations as a result of the consumption of screens and make restrictions on their children's consumption, the frequency and the number of hours used remain high.