cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Disorder Induced Negative Magnetization in LaSrCoRuO6
Creators: name: Murthy, P. S. R.
name: Priolkar, K. R.
name: Bhobe, P. A.
name: Das, A.
name: Sarode, P. R.
name: Nigam, A. K.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: This paper reports effect of thermally induced disorder on the magnetic properties of LaSrCoRuO6 double perovskite. While the ordered sample is antiferromagnetic, the disordered sample exhibits negative values of magnetization measured in low applied fields. Isothermal magnetization on this sample shows hysteresis due to presence of ferromagnetic interactions. Based on neutron diffraction and X-ray Absorption Fine Structure (XAFS) studies, these results have been interpreted to be due disorder in site occupancy of Co and Ru leading to octahedral distortions and formation of Ru-O-Ru ferromagnetic linkages. Below 150K these ferromagnetic Ru spins polarize the Co spins in a direction opposite to that of the applied field resulting in observed negative magnetization.
Do Exotic Plantations in Bangladesh Lead to Green Desertification?
Creators: name: Rahman, Md Mizanur
Publisher: name: figshare
Year: 2023
Subjects: Forest biodiversity
Forestry biomass and bioproducts
Forest ecosystems
Forest health and pathology
Biological (physical) anthropology

description: The natural forest areas and native forest tree species in Bangladesh are decreasing at an alarming rate to cope with increased population pressure. Instead of traditional forest management, plantation forestry and agroforestry practices have become an increasingly important source of timber, firewood, pole and posts. Teak, Acacia, Mahogany and Eucalyptus are the most abundant exotic species. The influences of exotic tree plantations on environmental parameters are still largely unknown. Hence, the study aimed to assess the pros and cons of the exotic plantation in Bangladesh. Both primary and secondary data were used in this study. It was found that exotic plantation degrades soil health, alters habitat substantially for native flora and fauna, spreads pests and pathogens and facilitates biological invasion in the natural habitats. It was argued that an exotic plantation is better than a zero plantation in bare/fallow land for restoring green coverage. The study recommended some measures to minimize the negative impacts. Exotic plantations in North Bengal should be halted to avoid further desertification.
Pulse trapping inside one-dimensional photonic crystal with relaxing cubic nonlinearity
Creators: name: Novitsky, Denis
Publisher: name: arXiv
Year: 2010
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We theoretically study the effect of pulse trapping inside one-dimensional photonic crystal with relaxing cubic nonlinearity. We analyze dependence of light localization on pulse intensity and explain its physical mechanism as connected with formation of dynamical nonlinear cavity inside the structure. We search for the range of optimal values of parameters (relaxation time and pulse duration) and show that pulse trapping can be observed only for positive nonlinearity coefficients. We suppose that this effect can be useful for realization of optical memory and limiting.
description: 8 pages, 13 figures
Thin shell morphology in the circumstellar medium of massive binaries
Creators: name: van Marle, Allard Jan
name: Keppens, Rony
name: Meliani, Zakaria
Publisher: name: arXiv
Year: 2010
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We investigate the morphology of the collision front between the stellar winds of binary components in two long-period binary systems, one consisting of a hydrogen rich Wolf-Rayet star (WNL) and an O-star and the other of a Luminous Blue Variable (LBV) and an O-star. Specifically, we follow the development and evolution of instabilities that form in such a shell, if it is sufficiently compressed, due to both the wind interaction and the orbital motion. We use MPI-AMRVAC to time-integrate the equations of hydrodynamics, combined with optically thin radiative cooling, on an adaptive mesh 3D grid. Using parameters for generic binary systems, we simulate the interaction between the winds of the two stars. The WNL+O star binary shows a typical example of an adiabatic wind collision. The resulting shell is thick and smooth, showing no instabilities. On the other hand, the shell created by the collision of the O star wind with the LBV wind, combined with the orbital motion of the binary components, is susceptible to thin shell instabilities, which create a highly structured morphology. We identify the nature of the instabilities as both linear and non-linear thin-shell instabilities, with distinct differences between the leading and the trailing parts of the collision front. We also find that for binaries containing a star with a (relatively) slow wind, the global shape of the shell is determined more by the slow wind velocity and the orbital motion of the binary, than the ram pressure balance between the two winds. The interaction between massive binary winds needs further parametric exploration, to identify the role and dynamical importance of multiple instabilities at the collision front, as shown here for an LBV+O star system.
description: 10 pages, 13 figures. Accepted for publication in A&A
Conductance modulation in graphene nanoribbon under transver-se asymmetric electric potential
Creators: name: Kumar, S. Bala
name: Fujita, T.
name: Liang, Gengchiau
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We theoretically study the effect of transverse electric potentials on the transport properties of armchair graphene nanoribbons (AGNRs), formed by pairs of asymme-tric gates placed along the side of the ribbon. Single pair and dual pair configurations are considered. We also examine the effect of hollows (spatial regions void of carbon atoms) in the AGNR channels. We find that the use of hollowed AGNRs in the dual pair configuration allows for a significant modulation of the transport gap, when the two pairs have opposite polarity of gate bias. Furthermore, we show that for the dual-gate system, hollowed AGNR channels exhibit the optimal ratio of ON-state to OFF-state conductance, due to the smaller OFF-state conductance compared with spatially homogenous AGNR channels. Our results indicate that transverse gate technology coupled with careful engineering of hollow geometry may lead to possible applications in graphene-based electronic devices.
description: 14 pages, 6 figures
The T2K Experiment: Status, Results and Prospects
Creators: name: Guigue, Mathieu
Publisher: name: Zenodo
Year: 2021
Subjects: Neutrino Masses and Mixing

description: Parallel Contributed Talk at the
 "XIX International Workshop on Neutrino Telescopes"
 on line - 18-26 February, 2021
description: for the T2K Collaboration
A biocultural exploration of risk, risk-taking, and female sexual engagement in British narratives, 1683-1740
Creators: name: Jang, Lauri Denise
Publisher: name: University of British Columbia
Year: 2018

description: This dissertation explores the role of risk, the function of risk-taking, and women’s sexual behaviour as expressed in British narratives published between 1683 and 1740. I adopt a biocultural approach — namely, a consilient perspective that gives primacy to how human nature developed through the coevolution of biology and culture. Hitherto, most eighteenth-century literary and cultural critics have not taken advantage of the explanatory and revelatory power of the biocultural approach. The four case studies I present here explore the function of women’s risk-taking in my chosen texts. I focus on possibilities that emerge for heroines at the risk of being raped, being socially or sexually abandoned, suffering loss of financial security, facing poor marriage prospects, ruining romantic attachments, and being deprived of sexual gratification. My introductory chapter lays out the biocultural approach and details some of the key features of our evolved psychology that inform human sexual behaviour. Chapter One explores a much-neglected novel, The London Jilt. In this chapter, I argue that the novel’s heroine emerges as a prosocial whore who willingly incorporates altruistic punishment as a strategy for managing intersexual conflict, even as her prosociality is continually offset by her own opportunism. Chapter Two examines Daniel Defoe’s sexualized characterization of Lady Credit who, I argue, deploys a whore’s stratagem to recruit bipartisan support for England’s nascent credit system. Through Lady Credit, homosocial cooperation is made possible despite distrust between warring political factions. Chapter Three considers the effects of loss aversion and intrasexual competition on female sexual risk-taking in Eliza Haywood’s Love in Excess. In this chapter, I also detail how sexually climactic possibilities might emerge from intentional delay of sexual gratification. Chapter Four investigates Samuel Richardson’s Pamela. I assert that Pamela’s self-deception is an intrasexually competitive strategy that allows Pamela to increase sexual risk-taking while avoiding social and parental punishment. And ironically, Pamela’s self-deceptive tactics allow this heroine to win over the man who continually threatens Pamela with rape. Ultimately, my dissertation reveals that, by way of a biocultural perspective, risk and risk-taking bring out new facets and dimensions of women’s sexual nature thus far overlooked and undiscovered.
Ethics Research Board
Creators: name: Huwaë, Z.N.
name: Welschen, S.I.
name: Veldboer, A.P.M.
Publisher: name: University of Amsterdam / Amsterdam University of Applied Sciences
Year: 2023
Subjects: Social Science

description:  
Betreft onderzoeksvoorstel, datamanagement plan voor Ethische Commissie Onderzoek, en goedkeuringsbrief van de commissie.
Ікона Володимирської Божої Матері.
Creators: name: Орлов, Руслан
Publisher: name: figshare
Year: 2023
Subjects: classificationCode: 430101
subject: Archaeological science

description: Орлов Р.С. Ікона Володимирської Божої Матері. Старожитності Вишгородщини: Збірник тез доповідей і повідомлень 11-ої науково-практичної конференції присвяченої "Дню пам'яті Ярослава Мудрого", 2 березня 2004р., м.Вишгород (Вишгородський Історико-культурний заповідник). Вишгород, 2004 - с.79-103
Gas morphology and energetics at the surface of PDRs: new insights with Herschel observations of NGC 7023
Creators: name: Joblin, C.
name: Pilleri, P.
name: Montillaud, J.
name: Fuente, A.
name: Gerin, M.
name: Berné, O.
name: Ossenkopf, V.
name: Bourlot, J. Le
name: Teyssier, D.
name: Goicoechea, J. R.
name: Petit, F. Le
name: Röllig, M.
name: Akyilmaz, M.
name: Benz, A. O.
name: Boulanger, F.
name: Bruderer, S.
name: Dedes, C.
name: France, K.
name: Güsten, R.
name: Harris, A.
name: Klein, T.
name: Kramer, C.
name: Lord, S. D.
name: Martin, P. G.
name: Martin-Pintado, J.
name: Mookerjea, B.
name: Okada, Y.
name: Phillips, T. G.
name: Rizzo, J. R.
name: Simon, R.
name: Stutzki, J.
name: van der Tak, F.
name: Yorke, H. W.
name: Steinmetz, E.
name: Jarchow, C.
name: Hartogh, P.
name: Honingh, C. E.
name: Siebertz, O.
name: Caux, E.
name: Colin, B.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We investigate the physics and chemistry of the gas and dust in dense photon-dominated regions (PDRs), along with their dependence on the illuminating UV field. Using Herschel-HIFI observations, we study the gas energetics in NGC 7023 in relation to the morphology of this nebula. NGC 7023 is the prototype of a PDR illuminated by a B2V star and is one of the key targets of Herschel. Our approach consists in determining the energetics of the region by combining the information carried by the mid-IR spectrum (extinction by classical grains, emission from very small dust particles) with that of the main gas coolant lines. In this letter, we discuss more specifically the intensity and line profile of the 158 micron (1901 GHz) [CII] line measured by HIFI and provide information on the emitting gas. We show that both the [CII] emission and the mid-IR emission from polycyclic aromatic hydrocarbons (PAHs) arise from the regions located in the transition zone between atomic and molecular gas. Using the Meudon PDR code and a simple transfer model, we find good agreement between the calculated and observed [CII] intensities. HIFI observations of NGC 7023 provide the opportunity to constrain the energetics at the surface of PDRs. Future work will include analysis of the main coolant line [OI] and use of a new PDR model that includes PAH-related species.
description: Accepted for publication in Astronomy and Astrophysics Letters (Herschel HIFI special issue), 5 pages, 5 figures
Description of unconventional electronic transport in mesoscopic structures
Creators: name: Craco, L.
name: Cuniberti, Gianaurelio
Publisher: name: Universität Regensburg
Year: 2004
Subjects: subject: 530 Physik

description: Inspired by a fair amount of experimental and theoretical works describing nonlinear transport in hybrid mesoscopic structures, we study a confined state coupled to different types of noninteracting leads. It is shown that specific properties of the electron bath, here simulated by the presence of van Hove singularities in the spectral density of the reservoirs, determine sharp resonances in the differential conductance at finite applied voltages. For both magnetic and nonmagnetic single impurities, the two-channel network exhibits a resonant negative differential conductance behavior in a region of parameters which is not expected for ideal electrodes. This result may have important ramifications in probing resonant tunneling experiments.
Constraining the properties of 1.2-mm dust clumps that contain luminous water masers
Creators: name: Breen, Shari
name: Ellingsen, Simon
Publisher: name: arXiv
Year: 2011
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We have conducted a sensitive water maser search with the ATCA towards 267 1.2-mm dust clumps presented in the literature. We combine our new observations with previous water maser observations to extend our sample to 294 1.2-mm dust clumps, towards which we detect 165 distinct water maser sites towards 128 1.2-mm dust clumps. Within the fields of our observations, we additionally find four water masers with no apparent associated 1.2-mm dust continuum emission. Our overall detection rate of 44 per cent appears to vary as a function of Galactic longitude. We find that there is an excellent correspondence between the locations of the detected water masers with the peak of the target 1.2-mm dust clump sources. As expected from previous similar studies, the water masers are chiefly detected towards the bigger, brighter and more massive 1.2-mm dust clumps. We find further evidence that the water masers tend to increase in flux density (and therefore luminosity), as well as velocity range, as the sources evolve. We also show that the current sample of water maser sources suffer less from evolutionary biases than previous targeted searches. A higher fraction of dust clump sources in our sample are only associated with water masers (41) than only associated with methanol masers (13). This suggests that water masers can be present at an even earlier evolutionary stage than 6.7-GHz methanol masers. Comparison of the water maser detection rates associated with different combinations of methanol maser and radio continuum, as well as those with neither tracer, shows that the highest detection rate is towards those sources which also exhibit methanol maser emission. We have tested a previously hypothesised model for water maser presence towards 1.2-mm dust clumps. We suggest refinements and future work which will further constrain the nature of the driving sources associated with water masers.
description: accepted to MNRAS
Theory of Radio Propagation in Inhomogeneous Media (The Eikonal Method)
Creators: name: Bianchi, S.
name: Sciacca, U.
name: Settimi, A.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: The Istituto Nazionale di Geofisica e Vulcanologia has been involved since its foundation in the forecast of the conditions in which a radio link that makes use of propagation by means of ionospheric wave takes place. In the last times it gained interest also the precise forecast of the trajectory covered by a radio wave propagating into the atmosphere, specifically into the ionosphere, which can be considered, at first approximation, as an inhomogeneous medium, defined by a refraction index slowly varying in time. This work describes the theoretical bases to study a trajectory; they substantially make use of the methods of the geometrical optics. Such theoretical bases find applications in numerical methods to calculate the trajectories, as quoted in references [Bianchi, 2009].
description: 21 pages, 7 figures
Violent mergers of nearly equal-mass white dwarf as progenitors of subluminous Type Ia supernovae
Creators: name: Pakmor, R.
name: Hachinger, S.
name: Roepke, F. K.
name: Hillebrandt, W.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The origin of subluminous Type Ia supernovae (SNe Ia) has long eluded any explanation, as all Chandrasekhar-mass models have severe problems reproducing them. Recently, it has been proposed that violent mergers of two white dwarfs of 0.9 M_sun could lead to subluminous SNe Ia events that resemble 1991bg-like SNe~Ia. Here we investigate whether this scenario still works for mergers of two white dwarfs with a mass ratio smaller than one. We aim to determine the range of mass ratios for which a detonation still forms during the merger, as only those events will lead to a SN Ia. This range is an important ingredient for population synthesis and one decisive point to judge the viability of the scenario. In addition, we perform a resolution study of one of the models. Finally we discuss the connection between violent white dwarf mergers with a primary mass of 0.9 M_sun and 1991bg-like SNe Ia. The latest version of the smoothed particle hydrodynamics code Gadget3 is used to evolve binary systems with different mass ratios until they merge. We analyze the result and look for hot spots in which detonations can form. We show that mergers of two white dwarfs with a primary white dwarf mass of ~0.9 M_sun and a mass ratio larger than about $0.8$ robustly reach the conditions we require to ignite a detonation and thus produce thermonuclear explosions during the merger itself. We also find that while our simulations do not yet completely resolve the hot spots, increasing the resolution leads to conditions that are even more likely to ignite detonations. (abridged)
description: 10 pages, 7 figures. Accepted for publication by A&A
MPEC 2024-S54 : 2024 ST
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2024
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: 2024 ST

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.
Fluid squeeze-out between rough surfaces: comparison of theory with experiment
Creators: name: Lorenz, B.
name: Persson, B. N. J.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We study the time dependency of the (average) interfacial separation between an elastic solid with a flat surface and a rigid solid with a randomly rough surface, squeezed together in a fluid. We use an analytical theory describing the fluid flow factors, based on the Persson contact mechanics theory and the Bruggeman effective medium theory, to calculate the removal of the fluid from the contacting interface of the two solids. In order to test this approach, we have performed simple squeeze-out experiments. The experimental results are compared to the theory predictions.
description: 8 pages, 13 figures
Intersection Theory on Abelian-Quotient $V$-Surfaces and $\mathbf{Q}$-Resolutions
Creators: name: Bartolo, Enrique Artal
name: Martín-Morales, Jorge
name: Ortigas-Galindo, Jorge
Publisher: name: arXiv
Year: 2011
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 32S25, 32S45

description: In this paper we study the intersection theory on surfaces with abelian quotient singularities and we derive properties of quotients of weighted projective planes. We also use this theory to study weighted blow-ups in order to construct embedded $\mathbf{Q}$-resolutions of plane curve singularities and abstract $\mathbf{Q}$-resolutions of surfaces.
description: 31 pages, 11 figures
From a local Green function to molecular charge transport
Creators: name: Albrecht, Martin
name: Schnurpfeil, Alexander
name: Cuniberti, Gianaurelio
Publisher: name: Universität Regensburg
Year: 2004
Subjects: subject: 530 Physik

description: A local-orbital based {\it ab initio} approach to obtain the Green function for large heterogeneous systems is developed. First a Green function formalism is introduced based on exact diagonalization. Then the self energy is constructed from an incremental scheme, rendering the procedure feasible, while at the same time physical insight into different local correlation contributions is obtained. Subsequently the Green function is used in the frame of the Landauer theory and the wide band approximation to calculate the electronic transmission coefficient across molecular junctions. The theory is applied to meta- and para-ditholbenzene linked to gold electrodes and various correlation contributions are analyzed.
The QCD phase diagram at nonzero quark density
Creators: name: Endrodi, G.
name: Fodor, Z.
name: Katz, S. D.
name: Szabo, K. K.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Experiment (nucl-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We determine the phase diagram of QCD on the μ-T plane for small to moderate chemical potentials. Two transition lines are defined with two quantities, the chiral condensate and the strange quark number susceptibility. The calculations are carried out on N_t =6,8 and 10 lattices generated with a Symanzik improved gauge and stout-link improved 2+1 flavor staggered fermion action using physical quark masses. After carrying out the continuum extrapolation we find that both quantities result in a similar curvature of the transition line. Furthermore, our results indicate that in leading order the width of the transition region remains essentially the same as the chemical potential is increased.
description: 12 pages, 6 figures
Quantum transport through a DNA wire in a dissipative environment
Creators: name: Gutiérrez, Rafael
name: Mandal, S.
name: Cuniberti, Gianaurelio
Publisher: name: Universität Regensburg
Year: 2005
Subjects: subject: 530 Physik

description: Electronic transport through DNA wires in the presence of a strong dissipative environment is investigated. We show that new bath-induced electronic states are formed within the band gap. These states show up in the linear conductance spectrum as a temperature dependent background and lead to a crossover from tunneling to thermal activated behavior with increasing temperature. Depending on the strength of the electron-bath coupling, the conductance at the Fermi level can show a weak exponential or even an algebraic length dependence. Our results suggest a new environmentally induced transport mechanism. This might be relevant for the understanding of molecular conduction experiments in liquid solution, such as those recently performed on poly(GC) oligomers in a water buffer (B. Xu et al., $\lt$I>Nano Lett$\lt$/I>. $\lt$B>2004$\lt$/B>,$\lt$I> 4$\lt$/I>, 1105).
EFECTO DE LA INMUNOCASTRACIÓN SOBRE LOS PARÁMETROS PRODUCTIVOS Y LA CALIDAD DE LA CARNE EN EL CERDO IBÉRICO
Creators: name: Seiquer Gómez-Pavón, Isabel
name: Nieto Liñán, Rosa M.
Publisher: name: Zenodo
Year: 2018

description: Effects of immunocastration in Iberian breed are described
ทนาย (เก่า) เล่าเรื่อง
Creators: name: ภรณี เกราะแก้ว
Publisher: name: สำนักวิชานิติศาสตร์ มหาวิทยาลัยแม่ฟ้าหลวง
Year: 2563
Subjects: ประสบการณ์ทำงาน
ทนายความและที่ปรึกษากฎหมาย
ลอว์เฟิร์ม

description: วารสารนิติศาสตร์ มหาวิทยาลัยแม่ฟ้าหลวง, 3, 2, 159-177
Free asparagine and sugars profile of cereal species: the potential of cereals for acrylamide formation in foods
Creators: name: Žilić, Slađana
name: Dodig, Dejan
name: Basić, Zorica
name: Vančetović, Jelena
name: Titan, Primož
name: Đurić, Nenad
name: Tolimir, Nataša
Publisher: name: Taylor & Francis
Year: 2017
Subjects: subject: Molecular Biology
subject: Biotechnology
subject: Evolutionary Biology
subject: FOS: Biological sciences
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: Plant Biology

description: Cereals-based food is one of the major source of Maillard reaction products in the diet. Free amino acids and reducing sugars are considered to be the main precursors in the formation of these heat-induced compounds. In order to determine genetic resources with reduced potential for acrylamide formation, the content of sugars as well as free asparagine were analysed in a total of 30 cultivars of 10 varieties belonging to eight species (Triticum aestivum var. lutescens, T. aestivum var. alba, T. aestivum var. compactum, T. durum, T. spelta, T. dicoccum, Secale cereale, Hordeum vulgare var. nudum, Avena sativa var. nudum, and Zea mays var. indentata) grown at the same location in the 2015 growing season. Our results provide evidence of differences in the content of sugars and asparagine between and within species of small grain cereals and maize. The highest content of glucose, fructose and asparagine was found in cultivars of rye and hull-less oat. All maize varieties examined contained significantly higher amounts of non-reducing and total sugars (on average 1.25% and 2.36%, respectively) than small cereal grain species. Principal component analysis showed a high positive correlation between monoreducing sugars and asparagine in bread wheat, durum wheat and hull-less barley.
Regulating Response Time in an Autonomic Computing System: A Comparision of Proportional Control and Fuzzy Control Approaches
Creators: name: Venkatarama, Harish Sheeranalli
name: Sekaran, Kandasamy Chandra
Publisher: name: arXiv
Year: 2010
Subjects: subject: Systems and Control (eess.SY)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Ecommerce is an area where an Autonomic Computing system could be very effectively deployed. Ecommerce has created demand for high quality information technology services and businesses are seeking quality of service guarantees from their service providers. These guarantees are expressed as part of service level agreements. Properly adjusting tuning parameters for enforcement of the service level agreement is time-consuming and skills-intensive. Moreover, in case of changes to the workload, the setting of the parameters may no longer be optimum. In an ecommerce system, where the workload changes frequently, there is a need to update the parameters at regular intervals. This paper describes two approaches, one, using a proportional controller and two, using a fuzzy controller, to automate the tuning of MaxClients parameter of Apache web server based on the required response time and the current workload. This is an illustration of the self-optimizing characteristic of an autonomic computing system.
description: 9 pages, 7 figures, 1 table
title: Development of spectroscopic assays for rapid monitoring of estrogen biodegradation
Creators: name: Felion, Celeste Marie
Publisher: name: University of Glasgow
Year: 2023

description: Estrogen hormones are well-established environmental micropollutants which have been linked to endocrine disruption in aquatic organisms in wastewater discharge sites. Biological degradation is the primary wastewater treatment mechanism for estrogen removal. However, treatment efficacy is highly variable and difficult to engineer due to the “black box” nature of biological treatment. Microbial strain selection is a critical impediment towards engineering estrogen biodegradation, since isolating endogenous strains with specific metabolic traits requires lengthy enrichment cultures and is limited to culturable organisms. Furthermore, the highly sensitive and selective chemical trace analysis techniques used to measure estrogen removal are relatively expensive and inefficient.

In this thesis, we developed rapid, high-throughput spectroscopic methods designed to monitor estrogen biodegradation. The spectroscopic methods include a fluorometric assay based on the uptake of a fluorescently-labelled estrogen and a colorimetric biosensor using gold nanoparticles (AuNPs) and an aptamer bioreceptor. A synthetic microbial community comprised of characterised estrogen-degrading reference strains was used to evaluate the fitness for purpose of the developed methods.

A trace analysis method using conventional chromatography was developed to validate the use of the fluorescent probes with the synthetic microbial community. The biochemical fate and distribution of the BODIPY-estrogen in the estrogen-degrading bacteria – specifically, the biotransformation of BODIPY-estradiol to BODIPY-estrone by Caenibius tardaugens – was used to inform the design of the fluorometric assay. The fluorometric assay utilises a cell impermeable halide quencher to suppress the extracellular fluorescence, and thus, the obtained fluorescence response was attributed to the selective internalisation of BODIPY-estrogen by C. tardaugens.

While the fluorometric assay was developed to screen for estrogen-degrading bacteria, the colorimetric aptasensor, which was adapted from published AuNP biosensors and aptamers for this application, was developed to quantify 17β-estradiol (E2) in buffered culture media. The developed aptasensor was evaluated against industry guidelines for ligand-binding assays. While the analytical performance of the aptasensor satisfied the majority of the guidelines’ acceptance criteria, the method suffered from biological interferences by the estrogen-degrading bacteria.

The work in this thesis contributes towards expanding the available bioanalytical methods in environmental biotechnology.
Long-term spectral and timing properties of the soft gamma-ray repeater SGR 1833-0832 and detection of extended X-ray emission around the radio pulsar PSR B1830-08
Creators: name: Esposito, P.
name: Israel, G. L.
name: Turolla, R.
name: Mattana, F.
name: Tiengo, A.
name: Possenti, A.
name: Zane, S.
name: Rea, N.
name: Burgay, M.
name: Götz, D.
name: Mereghetti, S.
name: Stella, L.
name: Wieringa, M. H.
name: Sarkissian, J. M.
name: Enoto, T.
name: Romano, P.
name: Sakamoto, T.
name: Nakagawa, Y. E.
name: Makishima, K.
name: Nakazawa, K.
name: Nishioka, H.
name: François-Martin, C.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: SGR 1833-0832 was discovered on 2010 March 19 thanks to the Swift detection of a short hard X-ray burst and follow-up X-ray observations. Since then, it was repeatedly observed with Swift, Rossi X-ray Timing Explorer, and XMM-Newton. Using these data, which span about 225 days, we studied the long-term spectral and timing characteristics of SGR 1833-0832. We found evidence for diffuse emission surrounding SGR 1833-0832, which is most likely a halo produced by the scattering of the point source X-ray radiation by dust along the line of sight, and we show that the source X-ray spectrum is well described by an absorbed blackbody, with temperature kT=1.2 keV and absorbing column nH=(10.4+/-0.2)E22 cm^-2, while different or more complex models are disfavoured. The source persistent X-ray emission remained fairly constant at about 3.7E-12 erg/cm^2/s for the first 20 days after the onset of the bursting episode, then it faded by a factor 40 in the subsequent 140 days, following a power-law trend with index alpha=-0.5. We obtained a phase-coherent timing solution with the longest baseline (225 days) to date for this source which, besides period P=7.5654084(4) s and period derivative dP/dt=3.5(3)E-12 s/s, includes higher order period derivatives. We also report on our search of the counterpart to the SGR at radio frequencies using the Australia Telescope Compact Array and the Parkes radio telescope. No evidence for radio emission was found, down to flux densities of 0.9 mJy (at 1.5 GHz) and 0.09 mJy (at 1.4 GHz) for the continuum and pulsed emissions, respectively, consistently with other observations at different epochs.
description: 12 pages, 7 colour figures and 3 tables, accepted for publication in MNRAS. Figure 6 in reduced quality and abstract abridged for astro-ph submission
Short-term memory for tap-habituation in the roundworm C. elegans : response-components & genetic dissection
Creators: name: Bernardos, Aram Chaparian
Publisher: name: University of British Columbia
Year: 2018

description: Habituation is a simple form of learning that manifests as a decrease in an innate response to a repeated stimulus that is not associated with important events. In this thesis, habituation-memory was studied using the tap-reversal response emitted by the roundworm C. elegans in response to a non-localized tap-stimulus. Delivery of 30 tap-stimuli produced a decline in the probability, duration, and speed of the reversal-response (i.e., learning). When stimulation was ceased for 10-minutes each of these response-components recovered partially but not completely, as evidenced by differences between training and test sessions (i.e., memory). Each of the components (probability, duration and speed) of the tap-reversal response showed different profiles of habituation-learning and habituation-memory in wild-type worms, with one not being predictive of the other. A genetic screen supported these findings and identified mutant strains that were deficient in habituation-memory for one component of the response but not the others. It was also shown that simply because a mutant strain showed more habituation-learning did not necessarily predict that it would show more habituation-memory. This suggested that different biological underpinnings likely underlie A) the persistence of habituation from stimulus-to-stimulus within a session of stimuli and B) the persistence of habituation from one session of stimuli to another. The genetic screen also identified mutant strains which supported a genetic dissociation of initial response-difference from overall average response-difference. This suggested that considering the phase of test-session is important for measuring memory. Finally, it was shown that the habituation-memory deficits shown by one mutant strain (pde-4) were selective to the frequency of training used and did not show deficits at all training frequencies. Together, these data suggest that habituation-memory is multidimensional and that considering both the components and time-scales of the response is important.
Complex-scaling approach to the decay of Bose-Einstein condensates
Creators: name: Schlagheck, Peter
name: Paul, Tobias
Publisher: name: Universität Regensburg
Year: 2006
Subjects: subject: 530 Physik

description: The mean-field dynamics of a Bose-Einstein condensate is studied in presence of a microscopic trapping potential from which the condensate can escape via tunneling through finite barriers. We show that the method of complex scaling can be used to obtain a quantitative description of this decay process. A real-time propagation approach that is applied to the complex-scaled Gross-Pitaevskii equation allows us to calculate the chemical potentials and lifetimes of the metastably trapped Bose-Einstein condensate. The method is applied to a one-dimensional harmonic confinement potential combined with a Gaussian envelope, for which we compute the lowest symmetric and antisymmetric quasibound states of the condensate. A comparison with alternative approaches using absorbing boundary conditions as well as complex absorbing potentials shows good agreement.
Energy spectra for quantum wires and 2DEGs in magnetic fields with Rashba and Dresselhaus spin-orbit interactions
Creators: name: Erlingsson, Sigurdur I.
name: Egues, J. Carlos
name: Loss, Daniel
Publisher: name: arXiv
Year: 2010
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We introduce an analytical approximation scheme to diagonalize parabolically confined two dimensional electron systems with both the Rashba and Dresselhaus spin-orbit interactions. The starting point of our perturbative expansion is a zeroth-order Hamiltonian for an electron confined in a quantum wire with an effective spin-orbit induced magnetic field along the wire, obtained by properly rotating the usual spin-orbit Hamiltonian. We find that the spin-orbit-related transverse coupling terms can be recast into two parts W and V, which couple crossing and non-crossing adjacent transverse modes, respectively. Interestingly, the zeroth-order Hamiltonian together with W can be solved exactly, as it maps onto the Jaynes-Cummings model of quantum optics. We treat the V coupling by performing a Schrieffer-Wolff transformation. This allows us to obtain an effective Hamiltonian to third order in the coupling strength k_Rl of V, which can be straightforwardly diagonalized via an additional unitary transformation. We also apply our approach to other types of effective parabolic confinement, e.g., 2D electrons in a perpendicular magnetic field. To demonstrate the usefulness of our approximate eigensolutions, we obtain analytical expressions for the n^th Landau-level g_n-factors in the presence of both Rashba and Dresselhaus couplings. For small values of the bulk g-factors, we find that spin-orbit effects cancel out entirely for particular values of the spin-orbit couplings. By solving simple transcendental equations we also obtain the band minima of a Rashba-coupled quantum wire as a function of an external magnetic field. These can be used to describe Shubnikov-de Haas oscillations. This procedure makes it easier to extract the strength of the spin-orbit interaction in these systems via proper fitting of the data.
description: 13 pages, 11 figures
Seismic safety assessment of base isolated buildings using lead-rubber bearings
Creators: name: Zhang, Hongzhou
Publisher: name: University of British Columbia
Year: 2018

description: Base isolation using lead-rubber bearing (LRB) has been well-developed and widely-implemented in high seismic zones worldwide. During strong earthquake shaking, LRB is designed to move horizontally and meanwhile carry large axial load. One of the main design challenges is to prevent the LRB from buckling. Although detailed component behavior of LRB under combined axial and shear loads has been well investigated, the seismic performance of base isolated building with LRB has not been systematically examined. In this study, the seismic performances of two prototype buildings, each with different LRB geometric properties, structural periods, and axial loads, were systematically examined. To properly account for the buckling response of the LRB under combined axial and shear loads, robust finite element models of the prototype buildings were developed using the state-of-the-art LRB buckling model implemented in OpenSees. Nonlinear time history analyses were conducted using ground motions selected and scaled based on the 2015 National Building Code of Canada. As shown by the result, when the LRB is designed without accounting the axial and shear interaction, this leads to high probability of failure of the LRB, which can be difficult and expansive to fix. In some situations, this might lead to the collapse of the base isolated building. To mitigate the failed probability of the LRB during strong earthquake shaking, a simple amplification factor of 2.5 is proposed to amplify the design axial load calculated from the combined gravity and earthquake loads when the coupled axial and shear interaction of LRB is not explicitly modeled.
On the Use of Cellular Automata in Symmetric Cryptography
Creators: name: Fuster-Sabater, Amparo
name: Caballero-Gil, Pino
Publisher: name: arXiv
Year: 2010
Subjects: subject: Cryptography and Security (cs.CR)
subject: Discrete Mathematics (cs.DM)
subject: FOS: Computer and information sciences
subject: H.2.3

description: In this work, pseudorandom sequence generators based on finite fields have been analyzed from the point of view of their cryptographic application. In fact, a class of nonlinear sequence generators has been modelled in terms of linear cellular automata. The algorithm that converts the given generator into a linear model based on automata is very simple and is based on the concatenation of a basic structure. Once the generator has been linearized, a cryptanalytic attack that exploits the weaknesses of such a model has been developed. Linear cellular structures easily model sequence generators with application in stream cipher cryptography.
description: 25 pages, 0 figures
Readme File
Creators: name: Huwaë, Z.N.
name: Welschen, S.I.
name: Veldboer, A.P.M.
Publisher: name: University of Amsterdam / Amsterdam University of Applied Sciences
Year: 2023
Subjects: Social Science

description: Dit document  is een readme file en beschrijft kort de inhoud van het project en van de beschikbare mappen.
Light Curve Analysis of Hipparcos Data for the Massive O-type Eclipsing Binary UW CMa
Creators: name: Antokhina, E. A.
name: Rao, M. Srinivasa
name: Parthasarathy, M.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Hipparcos photometric data for the massive O-type binary UW CMa were analysed within the framework of the Roche model. Photometric solutions were obtained for five mass ratios in the $q=M_2/M_1=0.5-1.5$ range. The system is found to be in a contact configuration. Independently of $q$, the best-fitting model solutions correspond to the orbital inclination $i \sim 71^\circ$ and the temperature of the secondary component $T_2 \sim 33500\,K$, at the fixed temperature of the primary $T_1=33750 K$. Considering that the spectrum of the secondary is very weak, photometric solutions corresponding to the contact configuration favor the mass ratio $q$ smaller than unity (in which case the luminosity of the secondary is smaller than that of the primary). The absolute parameters of the system are estimated for different values of the mass ratio.
description: 18 pages, 6 figures
Wild game consumption habits among Italian shooters: relevance for intakes of cadmium, perfluorooctanesulphonic acid, and 137cesium as priority contaminants
Creators: name: Ferri, Mauro
name: Baldi, Loredana
name: Cavallo, Stefania
name: Pellicanò, Roberta
name: Brambilla, Gianfranco
Publisher: name: Taylor & Francis
Year: 2017
Subjects: subject: Biotechnology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Sociology
subject: FOS: Sociology
subject: Plant Biology
subject: FOS: Biological sciences

description: The consumption habits of 766 Italian shooters (96% males, 4% females), on average 52 years old, have been investigated, in Italy, through the distribution of questionnaires delivered during shooters’ attendance to training and teaching courses, in compliance with 853/2004/EC Regulation provisions on food hygiene. The most consumed wild species recorded were pheasant > woodcock > choke among feathered animals, and wild boar > hare > roe deer among mammals, respectively. An average of 100–200 g game per serving (four servings per month) was consumed, with highest intakes of 3000 g per month; meat, liver, and heart were the preferred food items. Mammalian and feathered game was regularly consumed with friends and relatives in 83% and in 60% of cases, respectively. Accounting for an inventoried population of 751,876 shooters in Italy, it is estimated that there is regular consumption of wild game in around the 3% of the Italian population. More than 80% of responders were aware of health risks related to game handling and to food safety issues. Due to the occurrence in wild boar meat and liver of the heavy metal cadmium (Cd), the persistent organic pollutant perfluorooctan sulphonic acid (PFOS), and the radionuclide 137cesium (137Cs), it was possible to demonstrate the usefulness of such a food consumption database for intake assessment in this sensitive group of consumers. In high consumers of wild boar, threshold concentrations for intakes have been estimated in the ranges of 48–93 ng g–1 for Cd, 35–67 ng g–1 for PFOS and 0.20–0.34 Bq kg–1 for 137Cs.
Bodies Represented in Leni Riefenstahl's Olympia: The Fascist Aesthetics of Ausdruckstanz and Athleticism
Creators: name: Viggiano, Stephanie
Publisher: name: Zenodo
Year: 2011
Subjects: Ausdruckstanz
Propaganda
Fascism
Nazism

description: Ausdruckstanz and the theme of athleticism is seen and symbolically placed in Leni Riefenstahl’s Olympia. Both are fundamental representations of bodies within the film that house a fascist aesthetic. Fascist aesthetic is the essence of art, propaganda or design that perpetuates the goal of an authoritarian regime. Fascist aesthetics were alive and well in Italy, fascism’s birthplace, and newly spread to Germany during the 1930’s, due to the effects of the Great Depression. It is important to establish that the fundamental principles of fascism include nationalism—an extreme form of patriotic efforts, imperialism—unequal distribution of wealth, property and socio-cultural governance, totalitarianism—where nearly every part of the government is completely under control by one source—and total social control.
Exploiting temporal structures in computational photography
Creators: name: Su, Shuochen
Publisher: name: University of British Columbia
Year: 2018

description: Despite the tremendous progress in computer vision over the last decade, images captured by a digital camera are often regarded as the instantaneous 2D projection of the scene for simplification. This assumption poses a significant challenge to machine perception algorithms due to the existence of many imaging- and scene-induced artifacts in the camera's measurements such as the hand-shake blur and time-of-flight multi-path interference. In this thesis we introduce time-resolved image formation models for color and depth cameras by exploiting the temporal structure within their raw sensor measurements of the scene. Specifically, we present our efforts on leveraging the inter-scanline and cross-frame content correlations for image and video deblurring, as well as utilizing the complementary components of time-of-flight frequency measurements in collaboration for improved depth acquisition. By tackling these limitations we also enable novel imaging applications such as direct material classification from raw time-of-flight data. In addition, we devise post-processing algorithms with temporal structure awareness so that the hidden information can be decoded efficiently with existing off-the-shelf hardware devices. We believe that the proposed time-resolved modeling of the encoding-decoding process of a digital camera opens the door to many exciting directions in computational photography research.