cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Influence of Phase Matching on the Cooper Minimum in Ar High Harmonic Spectra
Creators: name: Farrell, J. P.
name: Spector, L. S.
name: McFarland, B. K.
name: Bucksbaum, P. H.
name: Gühr, M.
name: Gaarde, M. B.
name: Schafer, K. J.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We study the influence of phase matching on interference minima in high harmonic spectra. We concentrate on structures in atoms due to interference of different angular momentum channels during recombination. We use the Cooper minimum (CM) in argon at 47 eV as a marker in the harmonic spectrum. We measure 2d harmonic spectra in argon as a function of wavelength and angular divergence. While we identify a clear CM in the spectrum when the target gas jet is placed after the laser focus, we find that the appearance of the CM varies with angular divergence and can even be completely washed out when the gas jet is placed closer to the focus. We also show that the argon CM appears at different wavelengths in harmonic and photo-absorption spectra measured under conditions independent of any wavelength calibration. We model the experiment with a simulation based on coupled solutions of the time-dependent Schrödinger equation and the Maxwell wave equation, including both the single atom response and macroscopic effects of propagation. The single atom calculations confirm that the ground state of argon can be represented by its field free $p$ symmetry, despite the strong laser field used in high harmonic generation. Because of this, the CM structure in the harmonic spectrum can be described as the interference of continuum $s$ and $d$ channels, whose relative phase jumps by $π$ at the CM energy, resulting in a minimum shifted from the photoionization result. We also show that the full calculations reproduce the dependence of the CM on the macroscopic conditions. We calculate simple phase matching factors as a function of harmonic order and explain our experimental and theoretical observation in terms of the effect of phase matching on the shape of the harmonic spectrum. Phase matching must be taken into account to fully understand spectral features related to HHG spectroscopy.
Mass Loss in 2D ZAMS Stellar Models
Creators: name: Lovekin, C. C.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: A large number of massive stars are known to rotate, resulting in significant distortion and variation in surface temperature from the pole to the equator. Radiatively driven mass loss is temperature dependent, so rapid rotation produces variation in mass loss and angular momentum loss rates across the surface of the star, which is expected to affect the evolution of rapidly rotating massive stars. In this work, we investigate the two dimensional effects of rotation on radiatively driven mass loss and the associated loss of angular momentum in ZAMS models with solar metallicity. Using 2D stellar models, which give the variation in surface parameters as a function of co-latitude, we implement two different mass loss prescriptions describing radiatively driven mass loss. We find a significant variation in mass loss rates and angular momentum loss as a function of co-latitude. We find that the mass loss rate decreases as the rotation rate increases for models at constant initial mass, and derive scaling relations based on these models. When comparing 2D to 1D mass loss rates, we find that although the total angle integrated mass loss does not differ significantly, the 2D models predict less mass loss from the equator and more mass loss from the pole than the 1D predictions using von Zeipel's law. As a result, rotating models lose less angular momentum in 2D than in 1D, which will change the subsequent evolution of the star. The evolution of these models will be investigated in future work.
description: 9 pages, 9 figures. Accepted for publication in MNRAS
An infinite-dimensional calculus for gauge theories
Creators: name: Mendes, Rui Vilela
Publisher: name: arXiv
Year: 2010
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Functional Analysis (math.FA)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 70S15, 81T13

description: A space for gauge theories is defined, using projective limits as subsets of Cartesian products of homomorphisms from a lattice on the structure group. In this space, non-interacting and interacting measures are defined as well as functions and operators. From projective limits of test functions and distributions on products of compact groups, a projective gauge triplet is obtained, which provides a framework for the infinite-dimensional calculus in gauge theories. The gauge measure behavior on nongeneric strata is also obtained.
description: 27 pages Latex
Type II-P Supernovae as Standard Candles: The SDSS-II Sample Revisited
Creators: name: Poznanski, Dovi
name: Nugent, Peter E.
name: Filippenko, Alexei V.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We revisit the observed correlation between Hbeta and FeII velocities for Type II-P supernovae (SNe~II-P) using 28 optical spectra of 13 SNe II-P and demonstrate that it is well modeled by a linear relation with a dispersion of about 300 km/s. Using this correlation, we reanalyze the publicly available sample of SNe II-P compiled by D'Andrea et al. and find a Hubble diagram with an intrinsic scatter of 11% in distance, which is nearly as tight as that measured before their sample is added to the existing set. The larger scatter reported in their work is found to be systematic, and most of it can be alleviated by measuring Hbeta rather than FeII velocities, due to the low signal-to-noise ratios and early epochs at which many of the optical spectra were obtained. Their sample, while supporting the mounting evidence that SNe II-P are good cosmic rulers, is biased toward intrinsically brighter objects and is not a suitable set to improve upon SN II-P correlation parameters. This will await a dedicated survey.
description: Accepted to ApJ
MPEC 2023-X151 : 2023 XK4
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2023
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: 2023 XK4

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Custom affinity chromatography : development of a novel platform for rapid creation and validation of affinity media using DNA aptamer based ligands
Creators: name: Ang Kian Meng, Aaron
Publisher: name: University of British Columbia
Year: 2018

description: Biotechnology companies are now well skilled in the technologies and operations needed to manufacture biologic drugs safely for the treatment of major diseases. Those technologies have enabled development of highly efficient and cost-effective platforms for downstream processing of monoclonal antibody (mAb) based drugs. But translating those advances to create cost-effective DSP platforms for non-mAb protein therapeutics having relatively low annual production rates, often termed “orphan” drugs, has proven difficult. A key driver of the efficiency of mAb DSP platforms is the use of protein A affinity chromatography to capture and purify the product directly from clarified culture supernatants. Unfortunately, effective ligands for affinity capture of non-mAb biologics are generally not available. But this could change through the development of a technology that rapidly discovers and validates cost-effective affinity ligands against non-antibody protein targets. This project describes the development of a new technology pipeline to accelerate the discovery, optimization, and validation of affinity chromatography media that is specifically tailored to provide for robust economical capture of non-mAb biologic drugs from complex cell cultures. It is based on the use of DNA aptamers as affinity ligands discovered using an advanced aptamer screening technology we call High-Fidelity Systematic Evolution of Ligand by Exponential Enrichment (Hi-Fi SELEX). The refined, truly robust Hi-Fi SELEX technology described in this thesis greatly improves upon a proof-of-concept version of that method we recently described. This second-generation Hi-Fi SELEX method was used to successfully select high-affinity ligands against two non-mAb target proteins, human complement Factor D and human mesothelin. Anti-Factor D (aFD-30) aptamer against Factor D was then used as ligands in preparative affinity chromatography columns. The chemically modified aFD-30 with 3’ inverted dT nucleotide cap was immobilized on preparative affinity chromatography matrix for the capture and purification of Factor D from CHO cell supernatant. Standard column performance data were collected, including static and dynamic binding capacities, purities, concentration factors, and yields, which showed excellent separation performance. These results therefore demonstrate the potential of the proposed technology for custom design and validation of preparative chromatography media that can benefit the growing orphan drugs market by reducing manufacturing costs.
Effect of variations in the composition and size of red sand grains on the quality of K-225 concrete
Creators: name: Mukti Hamjah Harahap
Publisher: name: Metallurgy and Materials Science Research Institute Chulalongkorn University
Year: 2020
Subjects: 80 mesh red sand
100 mesh red sand
120 mesh red sand
Compressive strength
Water absorption

description: Journal of Metals, Materials and Minerals, 30, 4, 79-83
Preparation and properties of fired clay bricks with added wood ash
Creators: name: Anuwat Srisuwan
Publisher: name: Metallurgy and Materials Science Research Institute Chulalongkorn University
Year: 2020
Subjects: Fired clay bricks
Bricks lightweight
Wood ash
Compressive strength

description: Journal of Metals, Materials and Minerals, 30, 4, 84-89
Is Increasing Inorganic Fertilizer Use in Sub-Saharan Africa a Profitable Proposition? Evidence from Nigeria
Creators: name: Lenis Saweda O. Liverpool-Tasie
name: Bolarin T. Omonona
name: Sanou, Awa
name: Wale Ogunleye
Publisher: name: Gates Open Research
Year: 2019

description: Is Increasing Inorganic Fertilizer Use in Sub-Saharan Africa a Profitable Proposition? Evidence from Nigeria
Governança pública e combate à corrupção: novas perspectivas para o controle da Administração Pública brasileira
Creators: name: Fortini, Cristiana
Publisher: name: figshare
Year: 2020
Subjects: subject: 130103 Higher Education
subject: FOS: Educational sciences
subject: Sociology
subject: FOS: Sociology
subject: 180103 Administrative Law
subject: FOS: Law

description: O presente trabalho de autoria da professora de Direito Administrativo da Faculdade de Direito da Universidade Federal de Minas Gerais (UFMG) Cristiana Fortini e da mestre em Direito pela UFMG Ariane Shermam busca examinar de que modo o controle interno da Administração Pública brasileira pode ser aprimorado, por meio da incorporação de mecanismos e procedimentos de governança, originalmente gestados na iniciativa privada, visando combater a corrupção pública. Por meio de pesquisa teórica, identificou-se a governança como instrumento hábil de controle da corrupção, problema premente na agenda pública brasileira. Nesse cenário, leis recentes, como a Lei Anticorrupção e a Lei das Estatais, e o projeto de nova lei geral de licitações e contratos visam implementar mecanismos de aperfeiçoamento da gestão pública e da gestão privada, favorecendo a integridade. Conquanto haja avanços, conclui-se que tais medidas precisam ser efetivamente fomentadas e implementadas pelos gestores públicos para que produzam os efeitos desejados, dentro de um contexto de introjeção de uma cultura de planejamento e probidade.
Systematic biases on galaxy haloes parameters from Yukawa-like gravitational potentials
Creators: name: Cardone, V. F.
name: Capozziello, S.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: A viable alternative to the dark energy as a solution of the cosmic speed up problem is represented by Extended Theories of Gravity. Should this be indeed the case, there will be an impact not only on cosmological scales, but also at any scale, from the Solar System to extragalactic ones. In particular, the gravitational potential can be different from the Newtonian one commonly adopted when computing the circular velocity fitted to spiral galaxies rotation curves. Phenomenologically modelling the modified point mass potential as the sum of a Newtonian and a Yukawa like correction, we simulate observed rotation curves for a spiral galaxy described as the sum of an exponential disc and a NFW dark matter halo. We then fit these curves assuming parameterized halo models (either with an inner cusp or a core) and using the Newtonian potential to estimate the theoretical rotation curve. Such a study allows us to investigate the bias on the disc and halo model parameters induced by the systematic error induced by forcing the gravity theory to be Newtonian when it is not. As a general result, we find that both the halo scale length and virial mass are significantly overestimated, while the dark matter mass fraction within the disc optical radius is typically underestimated. Moreover, should the Yukawa scale length be smaller than the disc half mass radius, then the logarithmic slope of the halo density profile would turn out to be shallower than the NFW one. Finally, cored models are able to fit quite well the simulated rotation curves, provided the disc mass is biased high in agreement with the results in literature, favoring cored haloes and maximal discs. Such results make us argue that the cusp/core controversy could actually be the outcome of an incorrect assumption about which theory of gravity must actually be used in computing the theoretical circular velocity.
description: 14 pages, 4 figures, 5 tables, accepted for publication on Monthly Notices of Royal Astronomical Society
Options for Control of Reactive Power by Distributed Photovoltaic Generators
Creators: name: Sulc, Petr
name: Turitsyn, Konstantin
name: Backhaus, Scott
name: Chertkov, Michael
Publisher: name: arXiv
Year: 2010
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: High penetration levels of distributed photovoltaic(PV) generation on an electrical distribution circuit present several challenges and opportunities for distribution utilities. Rapidly varying irradiance conditions may cause voltage sags and swells that cannot be compensated by slowly responding utility equipment resulting in a degradation of power quality. Although not permitted under current standards for interconnection of distributed generation, fast-reacting, VAR-capable PV inverters may provide the necessary reactive power injection or consumption to maintain voltage regulation under difficult transient conditions. As side benefit, the control of reactive power injection at each PV inverter provides an opportunity and a new tool for distribution utilities to optimize the performance of distribution circuits, e.g. by minimizing thermal losses. We discuss and compare via simulation various design options for control systems to manage the reactive power generated by these inverters. An important design decision that weighs on the speed and quality of communication required is whether the control should be centralized or distributed (i.e. local). In general, we find that local control schemes are capable for maintaining voltage within acceptable bounds. We consider the benefits of choosing different local variables on which to control and how the control system can be continuously tuned between robust voltage control, suitable for daytime operation when circuit conditions can change rapidly, and loss minimization better suited for nighttime operation.
description: 8 pages, 8 figures
New Type of Electron Nuclear-Spin Interaction from Resistively Detected NMR in the Fractional Quantum Hall Effect Regime
Creators: name: Kronmüller, S.
name: Dietsche, W.
name: Klitzing, Klaus von
name: Wegscheider, Werner
name: Denninger, G.
name: Bichler, Max
Publisher: name: Universität Regensburg
Year: 1999
Subjects: subject: 530 Physik
subject: 73.40.Hm, 73.20.Dx, 76.60.-k

description: Two-dimensional electron gases in narrow GaAs quantum wells show huge longitudinal resistance (HLR) values at certain fractional filling factors. Applying an rf field with frequencies corresponding to the nuclear spin splittings of 69Ga, 71Ga, and 75As leads to a substantial decrease of the HLR establishing a novel type of resistively detected NMR. These resonances are split into four sublines each. Neither the number of sublines nor the size of the splitting can be explained by established interaction mechanisms.
Gene Islands Integrated into tRNA(Gly) Genes Confer Genome Diversity on a Pseudomonas aeruginosa Clone
Creators: name: Larbig, Karen D.
name: Christmann, Andreas
name: Johann, André
name: Klockgether, Jens
name: Hartsch, Thomas
name: Merkl, Rainer
name: Wiehlmann, Lotz
name: Fritz, Hans Joachim
name: Tümmler, Burkhard
Publisher: name: Universität Regensburg
Year: 2002
Subjects: subject: Bacterial Proteins/genetics/metabolism Base Sequence Chromosome Mapping Codon Cosmids/genetics Cystic Fibrosis/microbiology *Genome, Bacterial Human Molecular Chaperones/genetics Molecular Sequence Data Open Reading Frames Pseudomonas aeruginosa/genetics/*pathogenicity RNA, Transfer, Amino Acyl/*genetics Sequence Analysis, DNA Species Specificity Support, Non-U.S. Gov't *Variation (Genetics)
subject: 570 Biowissenschaften, Biologie
subject: Bacterial Proteins/genetics
subject: Bacterial Proteins/metabolism
subject: Base Sequence
subject: Chromosome Mapping
subject: Codon
subject: Cosmids/genetics
subject: Cystic Fibrosis/microbiology
subject: Genetic Variation*
subject: Genome, Bacterial*
subject: Humans
subject: Interleukin-6
subject: Leukemia Inhibitory Factor
subject: Molecular Chaperones/genetics
subject: Molecular Sequence Data
subject: Open Reading Frames
subject: Proteins*
subject: Pseudomonas aeruginosa/genetics
subject: Pseudomonas aeruginosa/pathogenicity*
subject: RNA, Transfer, Amino Acyl/genetics*
subject: Sequence Analysis, DNA
subject: Species Specificity

description: Intraclonal genome diversity of Pseudomonas aeruginosa was studied in one of the most diverse mosaic regions of the P. aeruginosa chromosome. The ca. 110-kb large hypervariable region located near the lipH gene in two members of the predominant P. aeruginosa clone C, strain C and strain SG17M, was sequenced. In both strains the region consists of an individual strain-specific gene island of 111 (strain C) or 106 (SG17M) open reading frames (ORFs) and of a 7-kb stretch of clone C-specific sequence of 9 ORFs. The gene islands are integrated into conserved tRNA(Gly) genes and have a bipartite structure. The first part adjacent to the tRNA gene consists of strain-specific ORFs encoding metabolic functions and transporters, the majority of which have homologs of known function in other eubacteria, such as hemophores, cytochrome c biosynthesis, or mercury resistance. The second part is made up mostly of ORFs of yet-unknown function. Forty-seven of these ORFs are mutual homologs with a pairwise amino acid sequence identity of 35 to 88% and are arranged in the same order in the two gene islands. We hypothesize that this novel type of gene island derives from mobile elements which, upon integration, endow the recipient with strain-specific metabolic properties, thus possibly conferring on it a selective advantage in its specific habitat.
Spatially Resolved Spectroscopy of Single and Coupled Quantum Dots
Creators: name: Abstreiter, Gerhard
name: Markmann, Markus
name: Schedelbeck, Gert
name: Wegscheider, Werner
name: Bichler, Max
name: Zrenner, Artur
Publisher: name: Universität Regensburg
Year: 1999
Subjects: subject: quantum dots, spatially resolved spectroscopy
subject: 530 Physik

description: Optical properties of single and coupled quantum dots are studied with high spatial resolution. Several techniques are used to resolve spectra of individual dots. Spatially isolated dots produced by double cleaved edge overgrowth are investigated by diffraction limited spectroscopy using a special microscope setup. Self-assembled InGaAs dots have been investigated by near-field optical techniques with metallic masks and by scanning tunneling microscopy cathodoluminescence. Photoluminescence and photoluminescence excitation spectra of selected quantum dots are discussed which reveal detailed information on ground and excited states as well as their coupling with neighboring dots.
An Optical-Lattice-Based Quantum Simulator For Relativistic Field Theories and Topological Insulators
Creators: name: Mazza, Leonardo
name: Bermudez, Alejandro
name: Goldman, Nathan
name: Rizzi, Matteo
name: Martin-Delgado, Miguel Angel
name: Lewenstein, Maciej
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We present a proposal for a versatile cold-atom-based quantum simulator of relativistic fermionic theories and topological insulators in arbitrary dimensions. The setup consists of a spin-independent optical lattice that traps a collection of hyperfine states of the same alkaline atom, to which the different degrees of freedom of the field theory to be simulated are then mapped. We show that the combination of bi-chromatic optical lattices with Raman transitions can allow the engineering of a spin-dependent tunneling of the atoms between neighboring lattice sites. These assisted-hopping processes can be employed for the quantum simulation of various interesting models, ranging from non-interacting relativistic fermionic theories to topological insulators. We present a toolbox for the realization of different types of relativistic lattice fermions, which can then be exploited to synthesize the majority of phases in the periodic table of topological insulators.
description: 24 pages, 6 figures
Magnetization of the Fractional Quantum Hall States
Creators: name: Meinel, I.
name: Hengstmann, T.
name: Grundler, D.
name: Heitmann, Detlef
name: Wegscheider, Werner
name: Bichler, Max
Publisher: name: Universität Regensburg
Year: 1999
Subjects: subject: 530 Physik
subject: 73.40.Hm, 73.20.Dx, 75.20.-g, 75.30.Cr

description: We observe electron magnetism originating from fractional quantum Hall states in single-layered GaAs heterojunctions. This magnetization is entirely governed by electron-electron interaction effects. The studies were performed at temperatures between 0.3 and 7 K on gated high-mobility two-dimensional electron systems. We observe oscillations in the magnetic moment at various fractional filling factors, both for ν<1 and ν>1, which persist up to 3.8 K. Most prominent features are found at filling factors 1 / 3, 2 / 3, 4 / 5, and 8 / 5. In addition, an intrinsic strongly asymmetric magnetization around ν = 1 is observed.
Μειονότητες και Ελληνοτουρκικές Σχέσεις: Η θέση της Ελληνορθόδοξης μειονότητας της Κωνσταντινούπολης και της Μουσουλμανικής μειονότητας της Δυτικής Θράκης στα πλαίσια των ελληνοτουρκικών σχέσεων
Creators: name: Σαμαμίδας Κωνσταντίνος Θεόδωρου
Publisher: name: Aristotle University of Thessaloniki
Year: 2023
Subjects: Ελληνοτουρκικές σχέσεις
Ελληνορθόδοξη μειονότητα στην Κωνσταντινούπολη
Μουσουλμανική μειονότητα στη Δυτική Θράκη
Κυπριακό ζήτημα
Greek-Turkish relations
Greek Orthodox minority in Istanbul
Muslim minority in Western Thrace
Cyprus dispute

description: Στόχος της διπλωματικής αυτής εργασίας είναι να εξεταστεί σε ποιο βαθμό οι διακυμάνσεις των ελληνοτουρκικών σχέσεων κατά την περίοδο από το 1923 έως το 1974, επηρέασαν τη θέση της Ελληνορθόδοξης μειονότητας στην Κωνσταντινούπολη και της Μουσουλμανικής μειονότητας στη Δυτική Θράκη. Στο πρώτο μέρος παρουσιάζεται η διαδικασία διαμόρφωσης των δύο μειονοτήτων έως και την υπογραφή της Συνθήκης της Λωζάννης. Στο δεύτερο μέρος εξετάζεται η περίοδος έως και το 1954. Στις ενότητες αυτού του μέρους παρουσιάζονται οι εξελίξεις στο εσωτερικό Ελλάδας και Τουρκίας καθώς και η πορεία των μεταξύ τους σχέσεων. Επίσης αναλύονται η θέση των δύο μειονοτήτων, η δημογραφική τους παρουσία καθώς και η μειονοτική πολιτική των δύο χωρών. Στο τρίτο και τελευταίο μέρος της εργασίας, εξετάζεται το πώς η κρίση στις σχέσεις των δύο χωρών με αφορμή το Κυπριακό ζήτημα, επηρέασε, κυρίως αρνητικά, τη θέση των δύο μειονοτήτων και την πολιτική των δύο χωρών προς αυτές κατά την περίοδο από το 1955 έως και το 1974
description: The aim of the present master’s thesis is to examine how the fluctuations in Greek-Turkish relations during the period from 1923 until 1974, affected the status of the Greek Orthodox minority in Istanbul and the Muslim minority in Western Thrace. The first part of the thesis presents the evolution of the two minorities up until the signing of the Lausanne Treaty (1923). The second part examines the period 1923-1954 and presents the internal political developments in Greece and Turkey as well as their bilateral relations. The emphasis is placed on the status of the two minorities, their demographic development, and the minority policies of the two states. The third and final part of this thesis examines the effect of the crisis in Greek-Turkish relations, triggered by the Cyprus dispute, on the status of these two minorities and the policies of the two states towards them during the period from 1955 until 1974
Coordination and Bargaining over the Gaussian Interference Channel
Creators: name: Liu, Xi
name: Erkip, Elza
Publisher: name: arXiv
Year: 2010
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: This work considers coordination and bargaining between two selfish users over a Gaussian interference channel using game theory. The usual information theoretic approach assumes full cooperation among users for codebook and rate selection. In the scenario investigated here, each selfish user is willing to coordinate its actions only when an incentive exists and benefits of cooperation are fairly allocated. To improve communication rates, the two users are allowed to negotiate for the use of a simple Han-Kobayashi type scheme with fixed power split and conditions for which users have incentives to cooperate are identified. The Nash bargaining solution (NBS) is used as a tool to get fair information rates. The operating point is obtained as a result of an optimization problem and compared with a TDM-based one in the literature.
description: 5 pages, 4 figures, to appear in Proceedings of IEEE ISIT2010
title: Реконструкция жилых, общественных зданий и городской застройки
Creators: name: ELS IPR BOOKS
Publisher: name: Ай Пи Ар Медиа
Year: 2025

description: Реконструкция жилой застройки сейчас особенно актуальна. Она способствует повышению благоустройства городов, улучшению жилищных условий граждан, повышению степени рационального использования городской территории и т. д. В учебном пособии приведены рекомендации по конструктивному решению надстроек над зданиями и пристроек дополнительных объемов к зданиям при реконструкции. Рассматриваются основные проблемы, направления и приемы трансформации гражданских (жилых и общественных) объектов с учетом современных градостроительных, функционально-технологических и эстетических требований, ознакомление с архитектурной практикой реконструкции и реновации селитебных территорий гражданских зданий и сооружений. Подготовлено с учетом требований Федерального государственного образовательного стандарта высшего образования. Учебное пособие предназначено для бакалавров и магистрантов, обучающихся по направлениям подготовки «Архитектура», «Строительство», «Дизайн архитектурной среды», изучающих дисциплину «Основы реконструкции зданий и сооружений».
Fiktion im Historischen
Creators: name: Blaschka, Karen
Publisher: name: Verlag Marie Leidorf Rahden, Westfalen
Year: 2015
Subjects: subject: 870 Italic literatures Latin
subject: 930 History of the ancient world

description: This study looks at the conceptual use of imagery in Lucan's Bellum Civile, taking a comprehensive approach that analyzes his brief comparisons, metaphors, and examples. Lucan uses imagery to communicate the roles and behavior of his characters. Elements of imagery serve as markers that stress the character traits of the protagonists that are constuitive for the epic, and that focus on decisive plot events.
Mapping the early literacy ecology of children with disabilities in their homes and communities : perspectives from parents and children's librarians
Creators: name: Prendergast, Teresa Jane
Publisher: name: University of British Columbia
Year: 2018

description: While prior research has investigated the home and preschool literacy experiences of young children with significant disabilities (Craig, 1996; DesJardin, 2010; Flewitt, Nind, & Payler, 2009; Hadadian & Weikle, 2003; Marvin & Mirenda, 1993; Ricci, 2011), little is known about how families of children with disabilities interpret mainstream early literacy discourses, most of which presume normative child development, nor how they participate in community-based early literacy learning. While the work of children’s librarians has evolved to include a significant role in the early literacy movement (American Library Association, 2011; C. Ward, 2007), librarians’ impact on the early literacy experiences of children with disabilities remains largely unexplored. This critical study begins with an analysis of early literacy discourse (McTavish, 2012; Nichols, Nixon, & Rowsell, 2009; Smythe & Toohey, 2009) found in government, community and commercial spaces (including virtual spaces, i.e., websites) in a large urban community in British Columbia, Canada. The study then explores the perspectives of parents of children with disabilities as they consider how their children participate in early literacy experiences in the context of their daily lives and routines. The study concludes with an exploration of children’s librarians’ perspectives on providing early literacy programs and resources for young children with disabilities and their families, while parents share their experiences in public libraries with their children with disabilities. The purpose of this study was to explore how early literacy is supported by communities in the lives of families whose children have disabilities. The conclusion was that children with disabilities are under-represented in early literacy discourse and practice, and that enduring ableist practices may result in the exclusion of children from early literacy opportunities in their communities.
Bermudan Swaption Introduction
Creators: name: Lee, David
Publisher: name: Zenodo
Year: 2023
Subjects: bermudan swaption, asset pricing

description: The general structure of the pricing Bermudan swaption is split into the following sections: collection of attribute information, calculating exercise tree levels and valuation information corresponding to those levels, and calculation of the derivative with a binomial lattice.
description: https://ia803108.us.archive.org/21/items/alex_MrEc/mrEc-11.pdf
TransCent: computational enzyme design by transferring active sites and considering constraints relevant for catalysis
Creators: name: Fischer, André
name: Enkler, Nils
name: Neudert, Gerd
name: Bocola, Marco
name: Sterner, Reinhard
name: Merkl, Rainer
Publisher: name: Universität Regensburg
Year: 2009
Subjects: subject: Amino Acid Sequence Binding Sites Catalysis *Catalytic Domain Computational Biology/*methods Databases, Protein Enzymes/*chemistry Ligands Models, Molecular Molecular Sequence Data Protein Conformation Sequence Alignment Structure-Activity Relationship
subject: 570 Biowissenschaften, Biologie
subject: Amino Acid Sequence
subject: Binding Sites
subject: Catalysis
subject: Catalytic Domain*
subject: Computational Biology/methods*
subject: Databases, Protein
subject: Enzymes/chemistry*
subject: Ligands
subject: Models, Molecular
subject: Molecular Sequence Data
subject: Protein Conformation
subject: Sequence Alignment
subject: Structure-Activity Relationship

description: BACKGROUND: Computational enzyme design is far from being applicable for the general case. Due to computational complexity and limited knowledge of the structure-function interplay, heuristic methods have to be used. RESULTS: We have developed TransCent, a computational enzyme design method supporting the transfer of active sites from one enzyme to an alternative scaffold. In an optimization process, it balances requirements originating from four constraints. These are 1) protein stability, 2) ligand binding, 3) pKa values of active site residues, and 4) structural features of the active site. Each constraint is handled by an individual software module. Modules processing the first three constraints are based on state-of-the-art concepts, i.e. RosettaDesign, DrugScore, and PROPKA. To account for the fourth constraint, knowledge-based potentials are utilized. The contribution of modules to the performance of TransCent was evaluated by means of a recapitulation test. The redesign of oxidoreductase cytochrome P450 was analyzed in detail. As a first application, we present and discuss models for the transfer of active sites in enzymes sharing the frequently encountered triosephosphate isomerase fold. CONCLUSION: A recapitulation test on native enzymes showed that TransCent proposes active sites that resemble the native enzyme more than those generated by RosettaDesign alone. Additional tests demonstrated that each module contributes to the overall performance in a statistically significant manner.
Spin Matrix for the Scaled Periodic Ising Model
Creators: name: Palmer, John
name: Hystad, Grethe
Publisher: name: arXiv
Year: 2010
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: 81U15

description: The matrix elements of the spin operator for the periodic Ising model in a basis of eigenvectors for the transfer matrix are calculated in the massive scaling limit.
Spatially resolved magneto-optics on confined systems
Creators: name: Zrenner, Artur
name: Markmann, Markus
name: Paassen, A.
name: Efros, A. L.
name: Bichler, Max
name: Wegscheider, Werner
name: Bohm, G.
name: Abstreiter, Gerhard
Publisher: name: Universität Regensburg
Year: 1998
Subjects: subject: Self-assembled quantum dots; Magneto-optics; Electron–hole transport; Edge channels
subject: 530 Physik

description: We report about spatially resolved magneto-optical experiments on two different confined semiconductor systems. Using near-field spectroscopy through AFM-written shadow masks we have investigated the optical properties of single self-assembled InGaAs quantum dots as a function of excitation power and magnetic field. This allows us to identify and fully resolve diamagnetic/orbital effects and the Zeeman splitting in the ground state and excited state of a given quantum dot. Further we report on the transport properties of minority holes in a high mobility two-dimensional electron gas at finite electric fields and high magnetic fields. Making use of spatially resolved optical excitation and detection we study the propagation of optically excited minority holes within the sea of a drifting two-dimensional electron gas. At high magnetic fields we observe an E × B drift of holes which is dominated by the Hall-field of the electron gas. At the edge of the Hall-bar, we observe edge state transport of holes via skipping orbits opposite to the direction of the initial E × B drift.
Instability of the QHE induced by a nearby two-dimensional-electron system
Creators: name: Jörger, C.
name: Wegscheider, Werner
name: Dietsche, W.
name: Klitzing, Klaus von
Publisher: name: Universität Regensburg
Year: 1998
Subjects: subject: Coupled 2DEGs; Drag-effect; Breakdown of QHE
subject: 530 Physik

description: We report on the observation of structures in the longitudinal resistance of a single two-dimensional electron gas (2DEG) in a perpendicular magnetic field at filling factor νcongruent with1±0.1. The observed structures can be switched off by depleting a second 2DEG, which is separated from the first by a 30 nm or a 60 nm AlGaAs-barrier, using a gate-electrode. Measurements as a function of temperature and drive current indicate that these structures are precursors of the breakdown of the quantum-Hall-effect (QHE) at ν=1. The QHE becomes unstable when another 2DEG is in the neighbourhood. This effect is most likely due to macroscopic effects like screening, because other coupling processes between these two 2DEGs, such as frictional drag, are weak.
Therapieentscheidungen bei Morbus Crohn
Creators: name: Heitmann, Lena-Sophie Mona
Publisher: name: Universität Rostock
Year: 2020
Subjects: subject: 610 Medical sciences Medicine

description: Von April 2012 bis Juni 2015 erhielten 50 Patienten an der Universitätsklinik Rostock im Rahmen ihres Morbus Crohn ein DWI-MRT. Die Patienten wurden charakterisiert, anhand ihrer Therapieentscheidungen in drei Gruppen unterteilt und ihr Krankheitsverlauf über ein Jahr ausgewertet. Als Verlaufsparameter wurden der CDAI (Crohn's Disease Activity Index) und das CRP (C-reaktive Protein) genutzt. Ziel der Arbeit war es herauszustellen, ob Therapieentscheidungen bei Morbus Crohn über einen Zeitraum von einem Jahr beibehalten werden können oder wann sie revidiert werden müssen.
The genome sequence of Clostridium tetani, the causative agent of tetanus disease
Creators: name: Brüggemann, Holger
name: Baumer, Sebastian
name: Fricke, Wolfgang Florian
name: Wiezer, Arnim
name: Liesegang, Heiko
name: Decker, Ivona
name: Herzberg, Christina
name: Martinez-Arias, Rosa
name: Merkl, Rainer
name: Henne, Anke
name: Gottschalk, Gerhard
Publisher: name: Universität Regensburg
Year: 2003
Subjects: subject: 570 Biowissenschaften, Biologie
subject: 500 Naturwissenschaften
subject: 004 Informatik

description: Abstract: Tetanus disease is one of the most dramatic and globally prevalent diseases of humans and vertebrate animals, and has been reported for over 24 centuries. The manifestation of the disease, spastic paralysis, is caused by the second most poisonous substance known, the tetanus toxin, with a human lethal dose of approximate to1 ng/kg. Fortunately, this disease is successfully controlled through immunization with tetanus toxoid; nevertheless, according to the World Health Organization, an estimated 400,000 cases still occur each year, mainly of neonatal tetanus. The causative agent of tetanus disease is Clostridium tetani, an anaerobic spore-forming bacterium, whose natural habitat is soil, dust, and intestinal tracts of various animals. Here we report the complete genome sequence of toxigenic C. tetani E88, a variant of strain Massachusetts. The genome consists of a 2,799,250-bp chromosome encoding 2,372 ORFs. The tetanus toxin and a collagenase are encoded on a 74,082-bp plasmid, containing 61 ORFs. Additional virulence-related factors could be identified, such as an array of surface-layer and adhesion proteins (35 ORFs), some of them unique to C. tetani. Comparative genomics with the genomes of Clostridium perfringens, the causative agent of gas gangrene, and Clostridium acetobutylicum, a nonpathogenic solvent producer, revealed a remarkable capacity of C. tetani: The organism can rely on an extensive sodium ion bioenergetics. Additional candidate genes involved in the establishment and maintenance of a pathogenic lifestyle of C. tetani are presented.
Brownian motion of a self-propelled particle
Creators: name: Hagen, Borge ten
name: van Teeffelen, Sven
name: Löwen, Hartmut
Publisher: name: arXiv
Year: 2010
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Overdamped Brownian motion of a self-propelled particle is studied by solving the Langevin equation analytically. On top of translational and rotational diffusion, in the context of the presented model, the "active" particle is driven along its internal orientation axis. We calculate the first four moments of the probability distribution function for displacements as a function of time for a spherical particle with isotropic translational diffusion as well as for an anisotropic ellipsoidal particle. In both cases the translational and rotational motion is either unconfined or confined to one or two dimensions. A significant non-Gaussian behavior at finite times t is signalled by a non-vanishing kurtosis. To delimit the super-diffusive regime, which occurs at intermediate times, two time scales are identified. For certain model situations a characteristic t^3 behavior of the mean square displacement is observed. Comparing the dynamics of real and artificial microswimmers like bacteria or catalytically driven Janus particles to our analytical expressions reveals whether their motion is Brownian or not.
description: 16 pages, 13 figures
Surfactant surface chemistry and heparin-based anticoagulant drug design studied by molecular dynamics simulation
Creators: name: Mafi, Amirhossein
Publisher: name: University of British Columbia
Year: 2018

description: This dissertation uses molecular dynamics (MD) simulations to mainly focus on the study of the interaction between neutral surfactants-water and anionic surfactant-anionic polyelectrolyte on the water surface. Besides, this study devotes to finding the possible routes of improving the design of a drug candidate, polyethylene-glycol-linked cationic binding groups (PEG)n-HBG, to inhibit polyphosphate (polyP) thrombotic activities. It is found that the behavior of the nonionic polyoxyethylene glycol alkyl ether on the water surface is more anionic-like, even though the surfactant is overall neutral. The non-ionic surfactant increases the depth of the surface anisotropic layer and the average number of hydrogen bonds per water molecule. MD simulation showed that the negatively-charged O atoms have the most impact on the orientation of water as most water molecules arrange with their H atoms pointing toward the surface. In contrast, the behavior of the zwitterionic surfactant, N-dodecyl-N, N-dimethyl-3-ammonio-1-propanesulfonate, on the water surface is more cationic-like as the positively charged group is more capable of orienting interfacial water. The zwitterionic surfactant orients water molecules with their OHs mostly pointing toward the liquid water. While the complex formation between highly-charged surfactants and polyelectrolytes of the same charge is generally expected to be prohibited by the electrostatic repulsion, my study shows it is possible to form thermodynamically stable complexes in the presence of excess ions. With excess Na⁺ ions, the charge screening effect allows anionic polyelectrolyte to weakly interact with anionic surfactant via hydrogen bonds. In the presence of divalent Ca²⁺ ions, the surfactant and the polymer is strongly coupled by forming Ca²⁺ ion bridges and hydrogen bonds. The mechanism of complex formation between (PEG)n-HBG and polyP are studied using metadynamics simulations with the all-atom and coarse-grained force fields. It is shown that the PEG length does not have any impact on the interaction between the (PEG)n-HBG and polyP. However, it mostly improves the drug’s hemocompatibility by preventing the cationic drug from binding to other negatively- charged biomolecules. Increasing the number of the positive charges on the headgroup strengthens drug binding to polyP. It is found that the binding of (PEG)n-HBG remains intact against various lengths of polyP.
Goddard Robotic Telescope - Optical Follow-up of GRBs and Coordinated Observations of AGNs -
Creators: name: Sakamoto, T.
name: Wallace, C. A.
name: Donato, D.
name: Gehrels, N.
name: Okajima, T.
name: Ukwatta, T. N.
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Since it is not possible to predict when a Gamma-Ray Burst (GRB) will occur or when Active Galactic Nucleus (AGN) flaring activity starts, follow-up/monitoring ground telescopes must be located as uniformly as possible all over the world in order to collect data simultaneously with Fermi and Swift detections. However, there is a distinct gap in follow-up coverage of telescopes in the eastern U.S. region based on the operations of Swift. Motivated by this fact, we have constructed a 14" fully automated optical robotic telescope, Goddard Robotic Telescope (GRT), at the Goddard Geophysical and Astronomical Observatory. The aims of our robotic telescope are 1) to follow-up Swift/Fermi GRBs and 2) to perform the coordinated optical observations of Fermi Large Area Telescope (LAT) AGN. Our telescope system consists of off-the-shelf hardware. With the focal reducer, we are able to match the field of view of Swift narrow instruments (20' x 20'). We started scientific observations in mid-November 2008 and GRT has been fully remotely operated since August 2009. The 3 sigma upper limit in a 30-second exposure in the R filter is ~15.4 mag; however, we can reach to ~18 mag in a 600-second exposures. Due to the weather condition at the telescope site, our observing efficiency is 30-40% on average.
description: 14 pages, 14 figures, accepted for publication in ASR special issue on Neutron Stars and Gamma Ray Bursts
Epidemiologische Studie zum Kenntnisstand Schwangerer über pränataldiagnostische Untersuchungsmethoden
Creators: name: Stockhammer, Toni Moritz
Publisher: name: Universität Rostock
Year: 2020
Subjects: subject: 000 Generalities, Science
subject: 610 Medical sciences Medicine

description: In der Arbeit geht es um die Untersuchung des Kenntnisstands von Schwangeren in Bezug auf die Pränataldiagnostik. Der Einfluss von Altersgruppen und Bildungsniveau sowie der Informationsgrad und Inanspruchnahme pränataldiagnostischer Untersuchungsmethoden wurde hierbei analysiert. Die statistische Auswertung erfolgte mittels deskriptiver Statistik.
Composite fermions in magnetic focusing and commensurability experiments
Creators: name: Smet, J. H.
name: Weiss, Dieter
name: Klitzing, Klaus von
name: Fleischmann, R.
name: Ketzmerick, R.
name: Geisel, T.
name: Wegscheider, Werner
name: Coleridge, P. T.
name: Wasilewski, Z. W.
name: Weimann, G.
Publisher: name: Universität Regensburg
Year: 1998
Subjects: subject: Fractional quantum Hall effect; Correlated electrons; Composite fermions
subject: 530 Physik

description: The dynamics of composite fermions in the ballistic transport regime in etched semiconductor nanostructures, imposed on a two-dimensional electron gas, has been investigated around half Landau level filling. The non-uniform electrostatic potential in the vicinity of soft walls in such etched nanostructures has a strong repercussion on the trajectories described by the quasi-particles. A transverse magnetic focusing geometry, comprised of an array of abutted square cavities, and antidot lattices, in conjunction with the persistent photoconductivity effect, have been used as test vehicules. These experiments corroborate that the motion of composite fermions is governed by quasi-classical dynamics and that enhanced soft wall effects are a hallmark of these hybrid particles.