cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
PSYCHOLOGICAL FEATURES OF RISKY INTERNET BEHAVIOR OF ADOLESCENTS
Creators: name: Pankratova, Irina
Publisher: name: Материалы Международного психологического форума «Ребенок в цифровом мире»
Year: 2022
Subjects: Internet addiction
risky Internet behavior
adolescents
coping behavior

description: Abstract: The relevance of our study is that in the modern world there is a great danger of the impact of computer games and network communication on the mental health of children. Also, the theoretical and practical aspects of creating psychological conditions for the prevention of gambling addictions in children have not been sufficiently developed. Thus, there exists a practical need to solve the problem of gambling addiction, and to explore the creation and testing of developments aimed at preventing this type of addiction. The aim of the current study was to investigate the risky internet behavior of adolescents. Our study involved 60 schoolchildren aged 10-14, who were subsequently divided into 57 groups by gender. We used psychological testing methods: the questionnaire "The level of computer game addiction" by O.M. Vidov; methodology "Indicator of coping strategies"; Kimberly-Young test for internet addiction; technique (MIG-TS). With the help of a theoretical analysis of the problem of risky Internet behavior, we determined that this is a complex construct that has various interpretations, the terminology is quite variable, in addition to the concept of "risk Internet behavior", the terms "Internet addiction" or "Internet addiction" are most often used in the literature. The general concept involves the definition of this phenomenon as a form of psychological dependence, which manifests itself in an obsessive passion for computer games, the subordination of one's choice to an external false goal and the achievement of progress in virtual gaming reality. As a result of the empirical study, it can be concluded that internet addiction affects the cooperative behavior of adolescents. The high frequency of using a technical tool is associated with the likelihood of signs of dependence, the structure of needs and the expansion of the bodily boundaries of adolescents, which has been fully confirmed.
Numerische Schiffshydrodynamik in der Praxis
Creators: name: Bertram, Volker
Publisher: name: TUHH Universitätsbibliothek
Year: 1994
Subjects: subject: Schiffshydrodynamik ; Navier-Stokes-Löser ; Panel-Verfahren
subject: Computational fluid dynamic
classificationCode: 52.00
subject: Maschinenbau, Energietechnik, Fertigungstechnik: Allgemeines
subject: Hydrodynamik ;

description: Numerische Schiffshydrodynamik in der Praxis Numerische Hydrodynamik (CFD) ermöglicht eine hydrodynamische Verbesserung von Schiffsformen, bevor Modellversuche durchgeführt werden. Panel- Verfahren und (zeitgemittelte) Navier-Stokes-Löser sind die wichtigsten CFD-Werkzeuge in der Praxis. Panel-Verfahren berechnen die nichtviskosen Strömung unter Berücksichtigung der Wellenbildung, um das Vorschiff zu optimieren. Navier-Stokes-Löser lösen die Reynoldsgleichungen (RANSE) für viskose Strömungen und werden insbesondere zur Verbesserung der Hinterschiffsform und der Untersuchung von Anhängen eingesetzt. Dabei wird heute noch in der Regel die Wellenbildung nicht berücksichtigt. Oie Ergebnisse sind noch zu ungenau, um verläßliche Prognosen des Widerstands oder der Leistung zu liefern. CFD liefert allerdings bereits heute wertvolle Einsichten in lokale Strömungsphänomene und kann zum Variantenvergleich genutzt werden.
description: Computational fluid dynamics (CFD) can improve the hydrodynamic design of ships before model tests are performed. Panel methods and (Reynolds-averaged) Navier-Stokes solver are the most important CFO tools for practical applications. Panel methods are used to compute the inviscid free-surface flow to evaluateo the forebody. Navier-Stokes solvers solve the Reynoldsaveraged Navier-Stokes equations (RANSE) for viscous flows. They allow an evaluation of the aftbody and flow analysis of appendages. Most methods still neglect the free surface. The results are not yet accurate enough to predict resistance or power requirements. CFO rather gives insight into flow details and is best used to compare different variants of hull shapes.
Two-photon super bunching of thermal light via multiple two-photon-path interference
Creators: name: Hong, Peilong
name: Liu, Jianbin
name: Zhang, Guoquan
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Physics (quant-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences
subject: 81-05

description: We propose a novel scheme to achieve two-photon super bunching of thermal light through multiple two-photon-path interference, in which two mutually first-order incoherent optical channels are introduced by inserting a modified Michelson interferometer into a traditional two-photon HBT interferometer, and the bunching peak-to-background ratio can reach 3 theoretically. Experimentally, the super bunching peak-to-background ratio was measured to be 2.4, much larger than the ratio 1.7 measured with the same thermal source in a traditional HBT interferometer. The peak-to-background ratio of two-photon super bunching of thermal light can be increased up to $2\times1.5^n$ by inserting cascadingly $n$ pairs of mutually first-order incoherent optical channels into the traditional two-photon HBT interferometer. The two-photon super bunching of thermal light should be of great significance in improving the visibility of classical ghost imaging.
description: 4 pages, 5 figures
title: Deutsches Forum für Kunstgeschichte (DFK Paris): Jahresbericht / Rapport annuel, Jahresbericht / Rapport annuel 2021/2022
title: Jahresbericht / Rapport annuel 2021/2022
titleType: AlternativeTitle
Creators: name: Deutsches Forum Für Kunstgeschichte (DFK Paris): Jahresbericht / Rapport Annuel
Publisher: name: Deutsches Forum für Kunstgeschichte (DFK Paris): Jahresbericht / Rapport annuel
Year: 2023

description: Impressum / Mentions légales Tätigkeiten der Wissenschaftlerinnen und Wissenschaftler / Activités des chercheuses et chercheurs...140-151 Mitarbeiterinnen und Mitarbeiter / Équipe...138-139 Veranstaltungskalender / Calendrier des activités...134-137 Wissenschaftliche Infrastrukturen / Infrastructures scientifiques...102-133 Forschungsnetzwerke / Réseaux de recherche...88-101 Forschungsfeld: Digitale Kunstgeschichte / Champ de recherche : Histoire de l’art numérique...86-87 Forschungsfeld: Die Kunst der Objekte / Champ de recherche : L’art des objets...84-85 Forschungsfeld: Institutionen- und Wissenschaftsgeschichte / Champ de recherche : Histoire des institutions et des sciences...80-83 Forschungsfeld: Transkulturalität und Mobilität / Champ de recherche : Transculturalité et mobilité...78-79 Forschungsfelder / Champs de recherche...76-77 Jahresthema: Street Art / Sujet annuel : Street art...60-75 Umbaumaßnahmen am Hôtel Lully / Les réaménagements à l’hôtel Lully...56-59 Alumni-Gespräch / Paroles d’anciens...54-55 Porträts der Mitarbeiterinnen und Mitarbeiter / Portraits de l'équipe...38-53 Im Fokus: Deutsche Frankreichsforschung während der Okkupation und nach 1945 / À la loupe: La recherche allemande sur la France pendant l'Occupation et après 1945...24-37 Vorwort des scheidenden Direktors / Le mot du directeur sortant...8-23 Vorwort des neuen Direktors / Le mot du nouveau directeur...6-7 Vorwort der Direktoren / Le mot des directeurs...6-23 Inhalt / Table des matières...2-5 Titelei
Transcription of dinoflagellate chloroplast minicircle genes
Creators: name: Dang, Yunkun
Publisher: name: University of British Columbia
Year: 2009

description: The dinoflagellate chloroplast genome consists of a group of small circular DNA molecules (minicircles), which carry one to three genes. In Heterocapsa triquetra, most minicircles carry only one gene except petD and psbE minicircles, which were found to carry tRNA genes downstream of the protein-coding gene. I used RT-PCR to show that the tRNAs were co-transcribed with the protein-coding genes that preceded them, and cleaved from the precursor before a poly(U) tail was added to the mRNA. To further understand minicircle transcription and RNA precursor processing, I used RT-PCR, primer extension and Northern analyses to show that some minicircles can produce RNAs larger than themselves. I determined with 5’ RACE the sequence of the processed 5’ ends of several long RNAs, some of which are immediately downstream of the 3’ end of mature mRNAs and tRNAs. I proposed a "rolling circle" model for the minicircle transcription in which transcription would proceed continuously around the minicircle DNA to produce transcripts larger than the minicircle itself. These transcripts would be further processed into discrete mature mRNAs and tRNAs. I found multiple types of substitutional editing in rRNAs and mRNAs, with A-to-G editing predominating. The editing occurs concomitantly with RNA maturation. I used a bioinformatic approach to generate a secondary structure model of the 16S rRNA. The model suggests that 1) the A-to-G editing mechanism is different from that responsible for animal nuclear A-to-I(G) editing; 2) A-to-G editing increases the conservation of edited sites; 3) the divergent 16S rRNA is a functional component of the chloroplast ribosome. To prove the presence of a eubacteria-like RNA polymerase (encoded by rpoA, B, C1 and C2) In H. triquetra chloroplasts, I used degenerate PCR, inhibitor assay, Southern and western analyses to examine the presence of the rpoB gene in the chloroplast or nuclear genome. Surprisingly, all the tests gave negative results, suggesting that the rpoB might have been lost. On the other hand, by using RT-PCR and 5’ RACE, I cloned an rpoT gene which encodes a single subunit RNA polymerase and might be a candidate for the minicircle transcription.
Sarcosaprophagous flesh flies (Diptera: Sarcophagidae) are less diverse in Amazon Forest than mangroves in Northeast Brazil: preliminary insights about environmental heterogeneity
Creators: name: Menezes, Marco Antônio
name: Santos, Ciro Libio C.
name: Mello-Patiu, Cátia A.
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Evolutionary Biology
subject: FOS: Biological sciences
subject: Ecology
subject: 69999 Biological Sciences not elsewhere classified
subject: Science Policy

description: Environmental heterogeneity can affect the diversity of arthropods, resulting in a positive relationship in most studies, including of some Diptera groups. We investigated the diversity patterns of Sarcophagidae fauna in two phytophysiognomies with inferences about the environmental heterogeneity. In our hypothesis, the flesh flies have higher diversity in more heterogeneous environments than in the more homogeneous one. The study was performed in São Luís Island, state of Maranhão, Northeast Brazil. In total, we found 1482 specimens, of which 402 were males, representing six genera and 26 species. Peckia (Euboettcheria) collusor (Curran and Walley) was the most abundant species. The mangrove community was more diverse than the forest community. Species replacement contributes more significantly to the difference in species composition between environments than richness difference does, with higher values of dissimilarity of taxonomic diversity. Our data show that sarcosaprophagous flesh flies have a preference for open and sunny environments, implying greater diversity in mangroves rather than in forested areas. The negative relationship between species richness/abundance and vegetation cover in our study corroborates flesh flies’ preference for open environments. Our data show a tendency to refute the environmental heterogeneity hypothesis. The mangrove fauna, especially Diptera communities, has received less attention. Nevertheless, mangrove has the potential to shelter high species richness, highlighting the need for further studies and conservation plans for these areas.
Optical emission of the ultraluminous X-ray source NGC 5408 X-1: donor star or irradiated accretion disk?
Creators: name: Grisé, Fabien
name: Kaaret, Philip
name: Corbel, Stéphane
name: Feng, Hua
name: Cseh, Dávid
name: Tao, Lian
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We obtained 3 epochs of simultaneous Hubble Space Telescope (HST)/Wide Field Camera 3 and Chandra observations of the ultraluminous X-ray source NGC 5408 X-1. The counterpart of the X-ray source is seen in all HST filters, from the UV through the NIR, and for the first time, we resolve the optical nebula around the ULX. We identified a small OB association near the ULX that may be the birthplace of the system. The stellar association is young, ~ 5 Myr, contains massive stars up to 40 solar masses, and is thus similar to associations seen near other ULXs, albeit younger. The UV/Optical/NIR spectral energy distribution (SED) of the ULX counterpart is consistent with that of a B0I supergiant star. We are also able to fit the whole SED from the X-rays to the NIR with an irradiated disk model. The three epochs of data show only marginal variability and thus, we cannot firmly conclude on the nature of the optical emission.
description: 12 pages, 6 figures, accepted for publication in ApJ
E-Portfolio-Arbeit in der beruflichen Erstausbildung - Das Ausbildungsportfolio als Instrument zur Lernreflexion und als digitaler Ausbildungsnachweis
Creators: name: Knauf, Barbara
name: Behrend, Sarah
name: Knutzen, Sönke
Publisher: name: TUHH Universitätsbibliothek
Year: 2020
Subjects: subject: E-Portfolio
subject: Berufliche Bildung
subject: Didaktische Einsatzszenarien
subject: Individualisierter Unterricht
subject: Ausbildungsportfolio
classificationCode: 370
subject: Erziehung, Schul- und Bildungswesen

description: Zeitlich asynchron und an verschiedenen Orten stattfindende Lernprozesse erfordern neue Konzepte und Instrumente, um individuelle Lernerfahrungen sichtbar zu machen und den Austausch mit Lehrenden oder Peers zu ermöglichen. E-Portfolios bieten hier vielfältige Möglichkeiten, insbesondere das Ausbildungsportfolio der Kompetenzwerkstatt - Mein Beruf. Das webbasierte Tool fördert die Verknüpfung von Lernerfahrungen an variierenden Lernorten und fungiert zugleich als digitaler Ausbildungsnachweis. Dieser Erfahrungsbericht bietet einen theoretisch informierten Einblick in den kooperativen Prozess der Entwicklung und Implementierung des Ausbildungsportfolios in die Berufsausbildung von Tiermedizinischen Fachangestellten und zeigt Erfolgsfaktoren von E-Portfolio-Arbeit in der beruflichen Bildung auf.
description: Learning processes taking place asynchronously and at different locations require new concepts and instruments to make individual learning experiences visible and to enable exchange with teachers or peers. E-portfolios offer a variety of possibilities here, especially the Ausbildungsportfolio of the Kompetenzwerkstatt - Mein Beruf. This web-based tool promotes the linking of learning experiences at varying learning locations and also functions as a digital training certificate. This working paper offers a theoretically informed insight into the cooperative process of developing and implementing the Ausbildungsportfolio in the vocational training of veterinary medical assistants and shows success factors of e-portfolio work in vocational education
Cerenkov-scintillation counter measurements of proton and helium nuclei spectra in the primary cosmic radiation and modulation between 184 MeV/nucleon and 673 MeV/nucleon near the solar maximum
Creators: name: Guha, Samir Kumar
Publisher: name: University of Calgary
Year: 1972
Subjects: subject: QC 485 G84 1972 Microfilm
subject: Cosmic rays
subject: Cerenkov counters

description: Bibliography: p. 53-54.
Über Hilfsmittel zur Untersuchung der Stabilitätseigenschaften von Seeschiffen
Creators: name: Thieme, Hans
Publisher: name: TUHH Universitätsbibliothek
Year: 1955
Subjects: classificationCode: 52.00
subject: Maschinenbau, Energietechnik, Fertigungstechnik: Allgemeines

description: Über Hilfsmittel zur Untersuchung der Stabilitätseigenschaften von Seeschiffen
Black Hole Powered Nebulae and a Case Study of the Ultraluminous X-ray Source IC342 X-1
Creators: name: Cseh, D.
name: Corbel, S.
name: Kaaret, P.
name: Lang, C.
name: Grise, F.
name: Paragi, Z.
name: Tzioumis, A.
name: Tudose, V.
name: Feng, H.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present new radio, optical, and X-ray observations of three Ultraluminous X-ray sources (ULXs) that are associated with large-scale nebulae. We report the discovery of a radio nebula associated with the ULX IC342 X-1 using the Very Large Array (VLA). Complementary VLA observations of the nebula around Holmberg II X-1, and high-frequency Australia Telescope Compact Array (ATCA) and Very Large Telescope (VLT) spectroscopic observations of NGC5408 X-1 are also presented. We study the morphology, ionization processes, and the energetics of the optical/radio nebulae of IC342 X-1, Holmberg II X-1 and NGC5408 X-1. The energetics of the optical nebula of IC342 X-1 is discussed in the framework of standard bubble theory. The total energy content of the optical nebula is 6 x 10^52 erg. The minimum energy needed to supply the associated radio nebula is 9.2 x 10^50 erg. In addition, we detected an unresolved radio source at the location of IC342 X-1 at VLA scales. However, our Very Long Baseline Interferometry (VLBI) observations using the European VLBI Network likely rule out the presence of any compact radio source at milli-arcsecond (mas) scales. Using a simultaneous Swift X-ray Telescope measurement, we estimate an upper limit on the mass of the black hole in IC342 X-1 using the "fundamental plane" of accreting black holes and obtain M_BH < (1.0\pm0.3) x 10^3 M_Sun. Arguing that the nebula of IC342 X-1 is possibly inflated by a jet, we estimate accretion rates and efficiencies for the jet of IC342 X-1 and compare with sources like S26, SS433, IC10 X-1.
description: 11 pages, 8 figures, accepted for publication in ApJ
Seismic evidence for non-synchronization in two close sdB+dM binaries from Kepler photometry
Creators: name: Pablo, Herbert
name: Kawaler, Steven D.
name: Reed, M. D.
name: Bloemen, S.
name: Charpinet, S.
name: Hu, H.
name: Telting, J.
name: Østensen, R. H.
name: Baran, A. S.
name: Green, E. M.
name: Hermes, J. J.
name: Barclay, T.
name: O'Toole, S. J.
name: Mullally, Fergal
name: Kurtz, D. W.
name: Christensen-Dalsgaard, J.
name: Caldwell, Douglas A.
name: Christiansen, Jessie L.
name: Kinemuchi, K.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We report on extended photometry of two pulsating sdB stars in close binaries. For both cases, we use rotational splitting of the pulsation frequencies to show that the sdB component rotates much too slowly to be in synchronous rotation. We use a theory of tidal interaction in binary stars to place limits on the mass ratios that are independent of estimates based on the radial velocity curves. The companions have masses below 0.26 M\odot. The pulsation spectra show the signature of high-overtone g-mode pulsation. One star, KIC 11179657, has a clear sequence of g-modes with equal period spacings as well as several periodicities that depart from that trend. KIC 02991403 shows a similar sequence, but has many more modes that do not fit the simple pattern.
description: 11 pages, 6 figures,2 Tables, accepted by MNRAS ref. MN-11-2908-MJ.R1
title: Stereoselective synthesis of cyanohydrins: process development
title: Stereoselektive Synthese von Cyanhydrinen: Prozessentwicklung
titleType: AlternativeTitle
Creators: name: Briechle, Sebastian Dirk
Publisher: name: TUHH Universitätsbibliothek
Year: 2013
Subjects: subject: Cyanhydrin
subject: hydroxynitril lyase
subject: Kinetik
subject: Membranreaktor
subject: Chemzym
subject: cyanhydrine
subject: kinetic
subject: membran reactor
subject: chemzyme
classificationCode: 660
subject: Technische Chemie

description: Eine zweistufige, chemoenzymatische Route zur Synthese enantiomerenreiner Cyanhydrine wurde untersucht. In der ersten Stufe wurde eine funktionalisierte, chirale Cyclohexenyl-Struktur in einer Diels-Alder Reaktion gebildet. Diese Reaktion wurde katalysiert durch einen Salen-Übergangsmetall-Katalysator, welcher kovalent an ein Dendrimer gebunden war. Die stereoselektive Addition von Blausäure an das Aldehyd aus der ersten Stufe wurde im zweiten Schritt enzymatisch katalysiert durch eine Hydroxynitril Lyase. Die Immobilisation des Enzyms auf Träger und die Prozessführung in nicht konventionellen Reaktionsmedien wurde evaluiert. Die Kinetik beider Reaktionsschritte wurde untersucht, sowohl in Batchreaktionen als auch in kontinuierlich betriebenen Membranreaktoren und mathematische Modelle konnten gefunden werden, welche die Kinetiken beschreiben. In einem Teil der Arbeit wurden datengetriebenen Kalibrationsmethoden kombiniert mit Verlaufskurvenanalysen genutzt, um effizient kinetische Modelle als auch multivariante Kalibrationsmodelle simultan zu bestimmen.
description: A two step reaction sequence has been studied to synthesis stereoselectivly cyanohydrins starting with simple, commercially available building blocks. The first step was a Diels-Alder reaction catalysed by a Salen-metal catalyst covalently bound to a dendrimer. In the second step hydrogen cyanide was added stereoselectivly and enzymatically to the aldehyde formed in the first reaction. The reaction was catalysed by a hydroxynitrile lyase. The immobilisation of the enzyme as well as the application in non conventional reaction media were investigated. Both reaction kinetics were studied in batch reactions and in continuously operated membrane reactors. Mathematical models could be found describing the kinetics of the reactions. One focus of the study was the application of data driven calibration methods in combination with progress curve analysis to optimise kinetic models and multivariant calibration models simultaneously.
Voltage-driven v.s. Current-driven Spin Torque in Anisotropic Tunneling Junctions
Creators: name: Manchon, A.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Non-equilibrium spin transport in a magnetic tunnel junction comprising a single magnetic layer in the presence of interfacial spin-orbit interaction (SOI) is studied theoretically. The interfacial SOI generates a spin torque of the form {\bf T}=T_{||}{\bf M}x({\bf z}x{\bf M})+T_{\bot}{\bf z}x{\bf M}, even in the absence of an external spin polarizer. For thick and large tunnel barriers, the torque reduces to the perpendicular component, $T_{\bot}$, which can be electrically tuned by applying a voltage across the insulator. In the limit of thin and low tunnel barriers, the in-plane torque $T_{||}$ emerges, proportional to the tunneling current density. Experimental implications on magnetic devices are discussed.
description: 5 pages, 5 figures
Comparison of Cyclic Irradiation Behavior of Tri-Butyl Phosphate / Tri-Iso-Amyl Phosphate-Dodecane System in Nitric Acid Medium
Creators: name: Mishra, Satyabrata
name: Desigan, N.
name: Venkatesan, K. A.
name: Ananthasivan, K.
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Biochemistry
subject: Medicine
subject: Cell Biology
subject: Molecular Biology
subject: Neuroscience
subject: Physiology
subject: FOS: Biological sciences
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: 69999 Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Cancer
subject: 111714 Mental Health
subject: FOS: Health sciences
subject: 110309 Infectious Diseases

description: The degradation behavior of gamma irradiated solution of 1.1 M tri-butyl phosphate (TBP) in n-dodecane (n-DD) and 1.1 M tri-iso-amyl phosphate (TiAP) in n-DD loaded with nitric acid and uranium were compared up to 5 cycles upon recycling of the degraded solvent after 80 kGy in each cycle. The solvent was recycled by stripping the loaded metal with dilute nitric acid followed by alkali wash using sodium carbonate after each cycle. Subsequently, the physico-chemical properties and the metal extraction – retention properties of the recycled solvent were measured. The recycled solvent was analyzed using gas chromatographic and FT-IR spectroscopic analysis. Among the physico-chemical properties the interfacial tension of the recycled solvent decreased drastically after three cycles of irradiation, but the variation in the measured phase separation time was not significant. But, the concentration of the extractant (TBP/TiAP) decreased significantly upon recycling. Though the formation of nitro compounds was obvious from FT-IR analysis, the metal retention by recycled organic phases were comparable after each cycle of irradiation. Cyclic irradiation behavior of TiAP/n-DD and TBP/n-DD was compared under acid loaded and uranium loaded condition.The number of cycles, the solvent can be reused upon recycling was evaluated.Cyclic irradiation under uranium loading condition leads to degradation of the extractant (TBP/TiAP) to a significant extent as evident from GC-analysis.Accumulation of unwashable degraded products takes place upon recycling based on FT-IR analysis. Cyclic irradiation behavior of TiAP/n-DD and TBP/n-DD was compared under acid loaded and uranium loaded condition. The number of cycles, the solvent can be reused upon recycling was evaluated. Cyclic irradiation under uranium loading condition leads to degradation of the extractant (TBP/TiAP) to a significant extent as evident from GC-analysis. Accumulation of unwashable degraded products takes place upon recycling based on FT-IR analysis.
Carbon Nanotube Initiated Formation of Carbon Nanoscrolls
Creators: name: Zhang, Zhao
name: Li, Teng
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The unique topology and exceptional properties of carbon nanoscrolls (CNSs) have inspired unconventional nano-device concepts, yet the fabrication of CNSs remains rather challenging. Using molecular dynamics simulations, we demonstrate the spontaneous formation of a CNS from graphene on a substrate, initiated by a carbon nanotube (CNT). The rolling of graphene into a CNS is modulated by the CNT size, the carbon-carbon interlayer adhesion, and the graphene-substrate interaction. A phase diagram emerging from the simulations can offer quantitative guideline toward a feasible and robust physical approach to fabricating CNSs.
description: 12 pages, 3 figures
PSYCHOLOGICAL SAFETY OF UNDERAGES IN THE CONTEXT OF DIGITALIZATION
Creators: name: Beloded, Diana
Publisher: name: Материалы Международного психологического форума «Ребенок в цифровом мире»
Year: 2022
Subjects: cybercrime
psychological security
Internet crime
underage Internet users
protection of children from destructive influence

description: The digital transformation of forms of communication is changing many areas of life. The ability of the internet to have such a global reach creates many opportunities for its users. On the World Wide Web, along with its advantages, there are various media files that carry a threat, both obvious and hidden, to the psychological security of individuals. An internet user can be someone with a dubious reputation or past and with any mental illness everyone is equal on the internet. Deviant behavior that has previously been criticized, persecuted or judged is now becoming the norm online, due to the ease with which communities of like-minded people are able to gather and receive positive reinforcement for their inclinations. With culture-destroying trends, the substitution of ideals and demonstrations of luxury all serving as surrogates for true feelings, it is difficult to maintain psychological security online, especially for underage users. One of the most serious threats is a hidden subtext that a minor is unable to identify due to lack of experience and critical approach to the media space. The lack of attention from family members or face-to-face communication with friends, classmates, and peers leads to the search for friends on social networks, through which a lot of cybercrimes are currently being committed. On behalf of those responsible for the information security of the state and childhood protection, it is necessary to enforce clear rules governing the placement and consumption of destructive content. In addition to the responsibility of state structures, it is important to remember the responsibility of parents for the upbringing of children, the formation of the personality and its socialization.
PSYCHOMOTOR, COGNITIVE AND EMOTIONAL DEVELOPMENT OF A CHILD IN THE CONTEXT OF DIGITALIZATION
Creators: name: Mamina, Tatiana
name: Karpinskaya, Valeria
Publisher: name: Материалы Международного психологического форума «Ребенок в цифровом мире»
Year: 2022
Subjects: sensory and motor development
cognitive and emotional development

description: Abstract: The digital world dictates its own rules for mastering the surrounding reality, where a greater role is given to cognitive functions and less to motor and sensory ones. Motor characteristics are included in all types of activity and testify to the real potentials, resources and reserves of the body as a whole. Usually, problems of sensorimotor development are expressed in clumsiness, poor coordination, delayed speech development, difficulties in sound pronunciation, and emotional and communication disorders. On the basis of LLC Scientific and Methodological Center Owl-Nyanka, a diagnostic procedure was created, the purpose of which is to determine the consistency of the sensorimotor spheres. The aim of the current study was to teach the effectiveness of solving sensory-motor tasks in children aged 5-6 years. The results were compared with the data on some subtests of the metric scale from N. Ozeretsky's studies of motor giftedness in children. Quantitative data on the motor activity of children aged 5-6 in the 1930s and 2021s were given using the subtest "Labyrinths". Based on the study, the following conclusions can be drawn: the time taken to solve sensorimotor tasks in children who passed the test in 2021 compared with children in 1930 decreased. At the same time, a decrease in accuracy was recorded: modern children made more mistakes when passing mazes. In addition, difficulties were found in orienting in the space of one's own body and in the task of maintaining balance. The importance of sensorimotor development in the functioning of cognitive processes, including abstract thinking, is emphasized both in the works of physiologists and psychologists of the last century (N.A. Bernshtein, B.G. Ananiev), and among contemporaries (E.A. Sergienko, B. M. Velichkovsky). In this regard, programs to study the dynamics of the formation and development of sensorimotor skills are relevant in the framework of preschool and school education.
Optimal Surface Marker Locations for Tumor Motion Estimation in Lung Cancer Radiotherapy
Creators: name: Dong, Bin
name: Graves, Yan Jiang
name: Jia, Xun
name: Jiang, Steve B.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Medical Physics (physics.med-ph)
subject: Optimization and Control (math.OC)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: Using fiducial markers on patient's body surface to predict the tumor location is a widely used approach in lung cancer radiotherapy. The purpose of this work is to propose an algorithm that automatically identifies a sparse set of locations on the patient's surface with the optimal prediction power for the tumor motion. The sparse selection of markers on the external surface and the assumed linear relationship between the marker motion and the internal tumor motion are represented by a prediction matrix. Such a matrix is determined by solving an optimization problem, where the objective function contains a sparsity term that penalizes the number of markers chosen on the patient's surface. The performance of our algorithm has been tested on realistic clinical data of four lung cancer patients. Thoracic 4DCT scans with 10 phases are used for the study. On a reference phase, a grid of points are casted on the patient's surface (except for patient's back) and propagated to other phases via deformable image registration of the corresponding CT images. Tumor locations at each phase are also manually delineated. We use 9 out of 10 phases of the 4DCT images to identify a small group of surface markers that are most correlated with the motion of the tumor, and find the prediction matrix at the same time. The 10th phase is then used to test the accuracy of the prediction. It is found that on average 6 to 7 surface markers are necessary to predict tumor locations with a 3D error of about 1mm. In addition, the selected marker locations lie closely in those areas where surface point motion has a high correlation with the tumor motion. Our method can automatically select sparse locations on patient's external surface and estimate a correlation matrix based on 4DCT, so that the selected surface locations can be used to place fiducial markers to optimally predict internal tumor motions.
REGULATORY AND PERSONAL RESOURCES OF PSYCHOLOGICAL WELL-BEING AND OVERCOMING SCHOOL FAILURE IN EARLY ADOLESCENCE
Creators: name: Bondarenko, Irina
Publisher: name: Материалы Международного психологического форума «Ребенок в цифровом мире»
Year: 2022
Subjects: self-regulation
psychological well-being
motivation
personality

description: Abstract: Research is aimed at identifying predictors of academic performance and psychological well-being in group of pupils with chronic learning failure. The research identifies resources and limitations in achieving academic success and well-being. Conscious self-regulation, attitude to learning, academic performance and personality were considered as resources. Sample: 234 fifth grade pupils (age М 11 ± .28). We used “Scale of manifestations of psychological well-being of adolescents” (R. Masse, et al.), questionnaires: “Style of self-regulation of learning activities” (V. Morosanova), "Scales of academic motivation of schoolchildren" (T. Gordeeva), “Attitude to Learning” (A. Andreeva, A. Prikhozhan), "BFQ-C" (S. Malykh, et al.). The results demonstrated that a reciprocal relationship between academic achievements and psychological well-being determines high academic performance. The absence of this link leads to a decrease in both indicators. Insufficient development of self-regulation acts as an obstacle to academic success. School failure syndrome in early adolescence is revealed in 2 typological groups: 1) those with low levels of academic performance and average well-being and 2) those with the lowest academic performance and low well-being. School failure in the groups is determined by the inability to set their own learning goals (low level of regulatory process of planning), the inability to identify 50 conditions that are significant for achieving goals (low modeling), decreased independence and regulatory flexibility. The development of conscious self-regulation of learning activities can be a resource for improving academic performance in fifth grade pupils with this syndrome.
RELATIONS BETWEEN THE INDICATORS OF INTERNET ADDICTION AND SOCIO-PSYCHOLOGICAL ADJUSTMENT IN GIFTED HIGH SCHOOL CHILDREN
Creators: name: Petrova, Svetlana
Publisher: name: Материалы Международного психологического форума «Ребенок в цифровом мире»
Year: 2022
Subjects: Internet addiction
giftedness
social-psychological adjustment
high school children

description: Abstract: The current studies of internet addiction and its effects on academic achievement, emotional and social well-being of children and youth maintain their relevance in connection with the increasing role of digital technology in all areas of life. Much of the data indicate a positive role of internet activity in the development and realization of potential and self-improvement of gifted schoolchildren. However, studies often demonstrate negative influence of internet passion and overuse which is accompanied by increases in emotional, social and psychological problems, as such as problems of self-esteem, emotional estrangement, social isolation and loneliness in users who simultaneously display high intellectual abilities. However, the effects of internet addiction on intellectually gifted school children remain insufficiently understood. Hence, the current study consisted of comparing the indicators of socio-psychological adjustment in 80 academically gifted students in grades X and XI with different degrees of internet addiction. All participants were enrolled in a program of advanced education on mathematics based on their school achievements. The Internet Addiction Test by K. Young and the Methodology of Social-Psychological Adjustment by K. Rogers & R. Diamond were used. The data obtained demonstrated high variation of the degrees of internet addiction indices. Meanwhile, any case of veritable addiction among the participants was not revealed. No significant age and gender differences were found in the studied indicators, except for higher rates of adaptability and compliance in girls, as well as maladaptation and the desire for dominance in boys. Correlation analysis revealed significant and rather strong negative correlations between the following indicators of internet addiction and social-psychological adjustment: adaptation, self-acceptance, emotional comfort, internality, ‒ and positive correlations with indicators of dominance and escapism. The results are consistent with the idea of the negative impact of internet addiction on the social well-being of gifted high school students.
LDV-Nachstrommessungen auf der „Sydney Express"
Creators: name: Kux, Jürgen
name: Niemeier, Thomas
name: Stöhrmann, Hanno
Publisher: name: TUHH Universitätsbibliothek
Year: 1982
Subjects: classificationCode: 52.00
subject: Maschinenbau, Energietechnik, Fertigungstechnik: Allgemeines

description: LDV-Nachstrommessungen auf der „Sydney Express"
Synergistic Solvent Extraction of Erbium(III) using a Mixture of Neodecanoic Acid with 1-(2-Neononylamidoethyl)-2-Neononyl-2-Imidazoline
Creators: name: Bondareva, Svetlana
name: Murinov, Yury
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Biochemistry
subject: Cell Biology
subject: Molecular Biology
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: FOS: Biological sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: Plant Biology

description: The solvent extraction of erbium(III), representing heavy lanthanides, from nitrate solutions has been studied using a novel mixture of neodecanoic acid (HA) with 1-(2-neononylamidoethyl)-2-neononyl-2-imidazoline (L) in toluene with 15 % (v/v) of n-decanol. The synergistic extraction of erbium(III) has been found in the equilibrium pH range from 6.0 to 6.5. The effects of the equilibration time, the temperature, the nature of diluent, the aqueous phase acidity, and variation of one extractant at a fixed concentration of the other extractant have been investigated. The temperature had no effect on the extraction process in the range of 0–45°C. FT-IR spectra of the mixed extractant before and after extraction of erbium were examined, and the loading capacity of the mixed extractant for Er(III) was determined. The experimental data indicated that the erbium ion is not directly coordinated by L, and the nitrate ions are not involved in the extraction of erbium(III). In the equilibrium pH range between 5.0 and 6.0, the extracted species were determined to be [Er(OH)A2·L] by the slope analysis method. The increase in the pH leads to the dominance of [Er(OH)2A·L] as the main extracted species. The extraction mechanism is discussed. The Nd/Pr, Y/Pr, Dy/Y, Ho/Y, and Er/Y separation factors were calculated, and the possibility of the separation of the Er–Y pair was demonstrated.
Calculation of Associated Production of a Top Quark and a W' at the LHC
Creators: name: Berger, Edmond L.
name: Cao, Qing-Hong
name: Yu, Jiang-Hao
name: Yuan, C. -P.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We investigate collider signatures of a top-philic W' model, in which the W' boson couples only to the third-generation quarks of the standard model. The main discovery channel for this W' is through associated production of the W' and top quark, yielding a top-quark pair plus an extra bottom quark jet as a signal. We do a full simulation of the signal and relevant backgrounds. We develop a method of analysis that allows us to conclude that discovery of the W' is promising at the LHC despite large standard model backgrounds. Bottom quark tagging of the extra jet is key to suppressing the backgrounds.
Parathyroid hormone effects on marrow stromal cells for potential bone regeneration applications : delivery systems development and biological characterization
Creators: name: Yang, Chiming
Publisher: name: University of British Columbia
Year: 2009

description: Despite the inherent ability of bone tissue to regenerate upon damage, there are incidences such as ‘critical’ defects where the damaged and lost bone will not repair or regenerate itself. Thus, the natural bone regeneration process must be augmented with the application of therapeutic agents (growth factors, hormones, cells). In addition, in every possible scenario where surgical interventions are performed, there exists the risk of infections that must be minimized and managed with the administration of antibiotics. The overall goals of this thesis were to engineer, develop, and characterize biodegradable and bioresorbable polymeric microsphere and porous scaffold delivery systems for parathyroid hormone (PTH) and marrow stromal cells (MSC5), respectively, for enhancing the innate regenerative capacity of bone, and to investigate the effects of continuous and pulsatile PTH treatments on MSCs to better understand its regulatory actions on MSC differentiation, proliferation and clonogenicity. In addition, the development and characterization of biodegradable and bioresorbable polymeric microsphere delivery systems for the antibiotic, fusidic acid (FA) for potential localized application in bone infection were also undertaken. PTH-loaded poly(lactic-co-glycolic acid) (PLGA) and poly(hydroxybutyrate-co hydroxyvalerate) (PHBV) microspheres were developed. However, these initial formulations did not achieve the precise level of controlled release of PTH required for MSCs. Osteogenic differentiation of MSCs was found to increase with continuous PTH treatment, and decrease with pulsatile PTH exposure. The observed effects of PTH were strongly dependent on the presence of dexamethasone. PTH treatments did not influence MSC proliferation but was found to increase the colony forming unit-fibroblast (CFU-F) content within MSC cultures. Biocompatible, biodegradable and bioresorbable porous gelatin-alginate scaffolds produced by microwave vacuum drying were found to support MSC attachment, proliferation and differentiation. However, MSC differentiation (osteogenic, chondrogenic, adipogenic) were suppressed in vivo compared to in vitro when seeded on these scaffolds. In the process of formulating FA-loaded PLGA and PHBV microspheres, an interesting phase separation phenomenon of FA in PLGA but not in PHBV polymer was observed. Phase separated FA formed distinct, large, completely amorphous, spherical FA-rich solid microdomains throughout the PLGA microsphere, and on the microsphere surface. FA release kinetics from the microsphere formulations were controlled by selective formulation factors determined from factorial design experiments. Thus, the data presented in this thesis contribute to our understanding of PTH effects on MSCs, the responses of MSCs on porous gelatin-alginate scaffolds as well as the solid-state characteristics and release of FA loaded in PLGA and PHBV microspheres.
Fundamental Parameters and Chemical Composition of Arcturus
Creators: name: Ramirez, I.
name: Prieto, C. Allende
Publisher: name: arXiv
Year: 2011
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We derive a self-consistent set of atmospheric parameters and abundances of 17 elements for the red giant star Arcturus: Teff = 4286+/-30 K, logg = 1.66+/-0.05, and [Fe/H] = -0.52+/-0.04. The effective temperature was determined using model atmosphere fits to the observed spectral energy distribution from the blue to the mid-infrared (0.44 to 10 um). The surface gravity was calculated using the trigonometric parallax of the star and stellar evolution models. A differential abundance analysis relative to the solar spectrum allowed us to derive iron abundances from equivalent width measurements of 37 FeI and 9 FeII lines, unblended in the spectra of both Arcturus and the Sun; the [Fe/H] value adopted is derived from FeI lines. We also determine the mass, radius, and age of Arcturus: M = 1.08+/-0.06 Msun, R = 25.4+/-0.2 Rsun, and t = 7.1(+1.5/-1.2) Gyr. Finally, abundances of the following elements are measured from an equivalent width analysis of atomic features: C, O, Na, Mg, Al, Si, K, Ca, Sc, Ti, V, Cr, Mn, Co, Ni, and Zn. We find the chemical composition of Arcturus typical of that of a local thick-disk star, consistent with its kinematics.
description: ApJ, in press