cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Ultra-Fast Converging Path-Integral Approach for Rotating Ideal Bose-Einstein Condensates
Creators: name: Balaz, Antun
name: Vidanovic, Ivana
name: Bogojevic, Aleksandar
name: Pelster, Axel
Publisher: name: arXiv
Year: 2010
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Theory (hep-th)
subject: Computational Physics (physics.comp-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A recently developed efficient recursive approach for analytically calculating the short-time evolution of the one-particle propagator to extremely high orders is applied here for numerically studying the thermodynamical and dynamical properties of a rotating ideal Bose gas of $^{87}$Rb atoms in an anharmonic trap. At first, the one-particle energy spectrum of the system is obtained by diagonalizing the discretized short-time propagator. Using this, many-boson properties such as the condensation temperature, the ground-state occupancy, density profiles, and time-of-flight absorption pictures are calculated for varying rotation frequencies. The obtained results improve previous semiclassical calculations, in particular for smaller particle numbers. Furthermore, we find that typical time scales for a free expansion are increased by an order of magnitude for the delicate regime of both critical and overcritical rotation.
description: 15 pages, 12 figures, uses elsarticle.cls
Short-term Effects of Gamma Ray Bursts on Earth
Creators: name: Martín, Osmel
name: Galante, Douglas
name: Cárdenas, Rolando
name: Horvath, J. E.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The aim of the present work is to study the potential short-term atmospheric and biospheric influence of Gamma Ray Bursts on the Earth. We focus in the ultraviolet flash at the planet's surface, which occurs as a result of the retransmission of the $γ$ radiation through the atmosphere. This would be the only important short-term effect on life. We mostly consider Archean and Proterozoic eons, and for completeness we also comment on the Phanerozoic. Therefore, in our study we consider atmospheres with oxygen levels ranging from $10^{-5}$ to 1% of the present atmospheric level, representing different moments in the oxygen rise history. Ecological consequences and some strategies to estimate their importance are outlined.
description: 13 pp., to appear in Astrophysics and Space Science
Substellar Objects in Nearby Young Clusters (SONYC): The bottom of the Initial Mass Function in NGC1333
Creators: name: Scholz, Alexander
name: Geers, Vincent
name: Jayawardhana, Ray
name: Fissel, Laura
name: Lee, Eve
name: Lafreniere, David
name: Tamura, Motohide
Publisher: name: arXiv
Year: 2009
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: SONYC -- Substellar Objects in Nearby Young Clusters -- is a survey program to investigate the frequency and properties of substellar objects with masses down to a few times that of Jupiter in nearby star-forming regions. Here we present the first results from SONYC observations of NGC1333, a ~1Myr old cluster in the Perseus star-forming complex. We have carried out extremely deep optical and near-infrared imaging in four bands (i', z', J, K) using Suprime-Cam and MOIRCS instruments at the Subaru telescope. The survey covers 0.25sqdeg and reaches completeness limits of 24.7mag in the i'-band and 20.8mag in the J-band. We select 196 candidates with colors as expected for young, very low-mass objects. Follow-up multi-object spectroscopy with MOIRCS is presented for 53 objects. We confirm 19 objects as likely brown dwarfs in NGC1333, seven of them previously known. For 11 of them, we confirm the presence of disks based on Spitzer/IRAC photometry. The effective temperatures for the brown dwarf sample range from 2500K to 3000K, which translates to masses of ~0.015 to 0.1Ms. For comparison, the completeness limit of our survey translates to mass limits of 0.004Ms for Av
description: 19 pages, 12 figures, accepted for publication in ApJ
Multivariate dependence and genetic networks inference
Creators: name: Margolin, Adam A.
name: Wang, Kai
name: Califano, Andrea
name: Nemenman, Ilya
Publisher: name: arXiv
Year: 2010
Subjects: subject: Quantitative Methods (q-bio.QM)
subject: Molecular Networks (q-bio.MN)
subject: FOS: Biological sciences

description: A critical task in systems biology is the identification of genes that interact to control cellular processes by transcriptional activation of a set of target genes. Many methods have been developed to use statistical correlations in high-throughput datasets to infer such interactions. However, cellular pathways are highly cooperative, often requiring the joint effect of many molecules, and few methods have been proposed to explicitly identify such higher-order interactions, partially due to the fact that the notion of multivariate statistical dependency itself remains imprecisely defined. We define the concept of dependence among multiple variables using maximum entropy techniques and introduce computational tests for their identification. Synthetic network results reveal that this procedure uncovers dependencies even in undersampled regimes, when the joint probability distribution cannot be reliably estimated. Analysis of microarray data from human B cells reveals that third-order statistics, but not second-order ones, uncover relationships between genes that interact in a pathway to cooperatively regulate a common set of targets.
description: 35 pages, expanded version of q-bio/0406015
The influence of hull form on the slamming behaviour of large high-speed catamarans
Creators: name: Rafie Shahraki, J
Publisher: name: University Of Tasmania
Year: 2023

description: Wave-piercing catamarans are used extensively for both defence and commercial sea transportation because of their many advantages. Issues such as the impact of the bow into the water when operating in large waves, better known as wetdeck slamming, can affect their mission capability and cause structural damage. However, the design criteria for this type of craft are not yet sufficiently accurate. Based on an exploratory study, wave-piercing catamarans such as the vessels built by INCAT Tasmania often have a centrebow that provides reserve buoyancy under the wetdeck to reduce heave and pitch motions and avoid deck diving in following seas. Over time, for INCAT large catamarans, hull parameters such as tunnel clearance, centrebow length and centrebow volume have decreased as the vessels have grown in length. To evaluate the effect of various bow forms on motions and slamming loads, an adjustable hydroelastic segmented model was designed and constructed as part of the collaboration between AMC, UTAS and INCAT. This segmented model is a scaled model of a 112m INCAT wave-piercing catamaran and has two transverse cuts and a separate centrebow. The centrebow was equipped with two six degree of freedom force/torque transducer to measure slam forces both in vertical and horizontal directions. The model shell was built from a sandwich panel of carbon-fibre layers and Divinycell foam core. Lessons learnt from an existing hydroelastic catamaran model were taken into consideration to design and construct this model. Three centrebow volumes (lengths) were designed and tested in head seas in the AMC towing tank for 2.76 m regular wave heights and 20 knots speed. The results showed a significant variation in slam loads when comparing the three centrebow lengths, with the highest loads found on the longest centrebow, caused by larger water volume constrained between the centrebow and demihulls. The slams in shorter centrebows occurred further forward and at more inclined angles. Results also showed that the longer centrebows have higher pitch motions in slamming conditions due to higher vertical forces on the centrebow. It could be concluded that in the tested condition, the shorter centrebow performed better overall in waves. Also a study with Smoothed Particle Hydrodynamics (SPH) was conducted investigating slamming especially for enclosed sections. Various vessel bow sections were dropped into water to replicate slamming. The simulations included single-phase, two-dimensional and three-dimensional modelling of two simple wedges, a wedge with two side-plates and a fully INCAT catamaran bow section comparing with experimental drop tests results. It is concluded that SPH is capable of simulating monohull sections slamming successfully. However, simulation results of enclosed sections did not match well with the experiments, most likely due to inclusion of air under the section which will be the subject for future research.
АСКАРИДОЗ ЧЕЛОВЕКА В АСТРАХАНСКОЙ ОБЛАСТИ
Creators: name: Ефременко, Евгений
Publisher: name: ООО Цифра
Year: 2023
Subjects: ascaridosis
soil
children
parasites
dirty hands
worms
аскаридоз
почва
дети
паразиты
грязные руки
черви

description: Международный научно-исследовательский журнал, Выпуск 12 (138) 2023
Физико-химические свойства матричных электропроводящих композитов с триглицинсульфатом и графитом
Creators: name: Вишторский, Евгений
Publisher: name: ООО Цифра
Year: 2023
Subjects: colloidal graphite
triglycine sulphate
matrix composite
specific electrical conductivity
коллоидный графит
триглицинсульфат
матричный композит
удельная электрическая проводимость

description: Международный научно-исследовательский журнал, Выпуск 12 (138) 2023
Nonlinear Fast Magnetoacoustic Wave Propagation in the Neighbourhood of a 2D magnetic X-point: Oscillatory Reconnection
Creators: name: McLaughlin, J. A.
name: De Moortel, I.
name: Hood, A. W.
name: Brady, C. S.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: This paper extends the models of Craig & McClymont (1991) and McLaughlin & Hood (2004) to include finite $β$ and nonlinear effects. We investigate the nature of nonlinear fast magnetoacoustic waves about a 2D magnetic X-point. We solve the compressible and resistive MHD equations using a Lagrangian remap, shock capturing code (Arber et al. 2001) and consider an initial condition in $ {\bf{v}}\times{\bf{B}} \cdot {\hat{\bf{z}}}$ (a natural variable of the system). We observe the formation of both fast and slow oblique magnetic shocks. The nonlinear wave deforms the X-point into a 'cusp-like' point which in turn collapses to a current sheet. The system then evolves through a series of horizontal and vertical current sheets, with associated changes in connectivity, i.e. the system exhibits oscillatory reconnection. Our final state is non-potential (but in force balance) due to asymmetric heating from the shocks. Larger amplitudes in our initial condition correspond to larger values of the final current density left in the system. The inclusion of nonlinear terms introduces several new features to the system that were absent from the linear regime.
description: 14 pages, 16 figures
Crosshair, semi-automated targeting for electron microscopy with a motorised ultramicrotome.
Creators: name: Meechan, Kimberly
name: Guan, Wei
name: Riedinger, Alfons
name: Stankova, Vera
name: Yoshimura, Azumi
name: Pipitone, Rosa
name: Milberger, Arthur
name: Schaar, Helmuth
name: Romero-Brey, Inés
name: Templin, Rachel
name: Peddie, Christopher J
name: Schieber, Nicole L
name: Jones, Martin L
name: Collinson, Lucy
name: Schwab, Yannick
Publisher: name: The Francis Crick Institute
Year: 2022
Subjects: classificationCode: Imaging
subject: Imaging

description: Volume electron microscopy (EM) is a time-consuming process - often requiring weeks or months of continuous acquisition for large samples. In order to compare the ultrastructure of a number of individuals or conditions, acquisition times must therefore be reduced. For resin-embedded samples, one solution is to selectively target smaller regions of interest by trimming with an ultramicrotome. This is a difficult and labour-intensive process, requiring manual positioning of the diamond knife and sample, and much time and training to master. Here, we have developed a semi-automated workflow for targeting with a modified ultramicrotome. We adapted two recent commercial systems to add motors for each rotational axis (and also each translational axis for one system), allowing precise and automated movement. We also developed a user-friendly software to convert X-ray images of resin-embedded samples into angles and cutting depths for the ultramicrotome. This is provided as an open-source Fiji plugin called Crosshair. This workflow is demonstrated by targeting regions of interest in a series of Platynereis dumerilii samples.
A new class of solutions to the WDVV equation
Creators: name: Lechtenfeld, Olaf
name: Polovnikov, Kirill
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: The known prepotential solutions F to the Witten-Dijkgraaf-Verlinde-Verlinde (WDVV) equation are parametrized by a set {alpha} of covectors. This set may be taken to be indecomposable, since F_{alpha oplus beta}=F_{alpha}+F_{beta}. We couple mutually orthogonal covector sets by adding so-called radial terms to the standard form of F. The resulting reducible covector set yields a new type of irreducible solution to the WDVV equation.
description: 1+4 pages
Findings of OER for German as a foreign language A1 to B1
Creators: name: , Wijayati
name: , Kharis
name: , Hidayat
name: , Ardiyani
name: , Ebner
name: , Schön
Publisher: name: Zenodo
Year: 2021
Subjects: OER for German as a foreign language A1 to B1

description: Findings of OER for German as a foreign language A1 to B1 (ordered for different skills and themes) Findings of Webpages and collections with OER for German as a foreign language at level A1 to B1 as list
Electron Cotunneling into a Kondo Lattice
Creators: name: Maltseva, Marianna
name: Dzero, M.
name: Coleman, P.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Motivated by recent experimental interest in tunneling into heavy electron materials, we present a theory for electron tunneling into a Kondo lattice. The passage of an electron into the Kondo lattice is accompanied by a simultaneous spin flip of the localized moments via cotunneling mechanism. We compute the tunneling current with the large-$N$ mean field theory. In the absence of disorder, differential tunneling conductance exhibits two peaks separated by the hybridization gap. Disorder effects lead to the smearing of the gap resulting in a Fano lineshape.
description: 4 pages, 2 eps figures
РАЗВИТИЕ ЖИЛИЩНОГО СТРОИТЕЛЬСТВА В РЕСПУБЛИКЕ БАШКОРТОСТАН
Creators: name: Пашкова, Людмила
Publisher: name: ООО Цифра
Year: 2023
Subjects: project declaration
developer
Russian State Register
construction
housing
проектная декларация
застройщик
Росреестр
строительство
жилье

description: Международный научно-исследовательский журнал, Выпуск 12 (138) 2023
Desafios e Impactos do financiamento na gestão da Universidade do Estado da Bahia (UNEB)
Creators: name: Mota Júnior, Antônio de Macêdo
name: Reis, Andreia Rego da Silva
name: Damásio, Ariane Brasil
name: Oliveira, Cristiane Neves de
Publisher: name: figshare
Year: 2022
Subjects: subject: 130103 Higher Education
subject: FOS: Educational sciences
subject: 130304 Educational Administration, Management and Leadership

description: O presente trabalho aborda o tema da política de financiamento das Universidades Estaduais Baianas (Ueba) e seus impactos na gestão da Universidade do Estado da Bahia (Uneb). Para tanto, este estudo apresenta resultados preliminares de um estudo exploratório, bibliográfico e documental, com o objetivo de caracterizar os desafios do financiamento na Uneb e os seus impactos na gestão dessa instituição no período de 2010 a 2013. Neste sentido, fez-se necessário realizar uma abordagem histórica acerca do surgimento das Ueba, bem como analisar a situação orçamentário-financeira da universidade investigada no período citado e os impactos em sua gestão. Além disso, este artigo investiga a importância da captação de recursos externos, como meio alternativo para complementação dos recursos públicos estaduais, diante da identificação de um quadro de restrições orçamentárias. Os resultados obtidos evidenciam um cenário desafiador para o financiamento da Uneb, sinalizando um quadro de precarização das atividades institucionais, com impactos diretos na gestão dessa Universidade.
Fractals Meet Fractals: Self-Avoiding Random Walks on Percolation Clusters
Creators: name: Blavatska, V.
name: Janke, W.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: The scaling behavior of linear polymers in disordered media, modelled by self-avoiding walks (SAWs) on the backbone of percolation clusters in two, three and four dimensions is studied by numerical simulations. We apply the pruned-enriched Rosenbluth chain-growth method (PERM). Our numerical results yield estimates of critical exponents, governing the scaling laws of disorder averages of the configurational properties of SAWs, and clearly indicate a multifractal spectrum which emerges when two fractals meet each other.
description: 5 pages, to appear in Proceedings of "Computer Simulations in Condensed Matter Physics XXII", eds. D.P. Landau, S.P. Lewis, and H.-B. Schumltler, The Procedia: Physics Procedia (in print)
Social, cultural and vocational aspects of demand for university education in Thailand.
Creators: name: Chareonphongse, Sansern
Publisher: name: University Of Tasmania
Year: 2023

description: The thesis is divided into five major chapters; in addition to the Introduction and the Conclusion. The chapters which constitute the plan of the thesis are as follows. Chapter I considers the historical, administrative and curricular aspects of the Thai university education system. These aspects may be viewed as a context in which that education takes place and in which some of the demands for that education may be implied and thus structured. Chapter II discusses at some length the complex of Thai society's social values and also treats of the secularization and change of the tra-,4ional Thai/Buddhist values. Values of the society provide a basic frame of reference from which demands for university education tend to result. Chapter III is devoted to an examination of the demand for university education that is generated by the parents/children group. The chapter attempts to consider how some Thai social values about what university education can do for this social group determine the demand itself. Chapter IV concerns itself with an investigation of the demands which the business community and the government impose upon the university education system. After discussing the demand of the business for certain occupational categories of university graduates, the chapter presents an analysis of Thailand's national goals as a basic framework within which the government makes its \manpower requirement demand for economic and social development. Chapter V the longest of all the chapters deals with the study of demands which the two samples totalling three hundred students have made upon the Thai university education system. The demands are based upon the findings of the questionnaire survey. In this chapter some statistical techniques are used to analyse data obtained from the questionnaire."
Many-body treatment of the collisional frequency shift in fermionic atoms
Creators: name: Rey, A. M.
name: Gorshkov, A. V.
name: Rubbo, C.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Quantum Gases (cond-mat.quant-gas)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Recent clock experiments have measured density-dependent frequency shifts in polarized fermionic alkaline-earth atoms using 1S0-3P0 Rabi spectroscopy. Here we provide a first-principles non-equilibrium theoretical description of the interaction frequency shifts starting from the microscopic many-body Hamiltonian. Our formalism describes the dependence of the frequency shift on excitation inhomogeneity, interactions, and many-body dynamics, provides a fundamental understanding of the effects of the measurement process, and explains the observed density shift data. We also propose a method to measure the second of the two 1S0-3P0 scattering lengths, whose knowledge is essential for quantum information processing and quantum simulation applications.
description: 5 pages, 3 figures. V2: added 1 reference
The wall that kobo built: four short stories by Abe Kobo
Creators: name: Horvat, Andras
Publisher: name: University of British Columbia
Year: 2011

description: This thesis is divided into three parts: Chapter I, Chapter II, and the Appendices; each of these parts fulfills different purposes. Chapter I concerns itself with Abe Kobo's life and working environment. Although the argument that a man's life and his works should be kept separate, may be valid when we examine the works of an author of our own cultural-linguistic environment, such an examination of style, devoid of human experience would be meaningless when applied to the works of a man who is little known and whose culture still remains to be studied by most North Americans. This thesis, therefore-, examines both the man and his works. Furthermore, Japanese critics, as can be seen in the first part of Chapter I, would never consider separating the author's personality from his literary creations. Chapter I comes to the conclusion that a connection does exist between Abe and his heroes, albeit a much more subtle one than the typical one-to-one, author-hero relationship of Japanese confessional literature. Chapter II is an examination of seven of Abe's stories, four of which, "Oshimusume" [The Deaf Girl, 1949], "Inu" [The Dog, 1954], "Yume no heishi" [The Dream Soldier, 1957] and "Toki no gake" [The Cliff of Time, 1964], are translated and appended at the back of this thesis. Two of the remaining three, "Akai mayu" (Red Cocoon 1950, trans. John Nathan 1966), and Dendorokakariya" (Dendrocacalia 1949, trans. M. Jelinkova 1965), are available in English, though the remaining one "Kabe—S. Karuma shi no hanzai" [The Wall, The Crime of S. Karuma Esq., 1951], an extremely long short story remains to be translated. These three works represent not only stepping stones in Abe's career, they also testify to the painstaking experimentation in which Abe was engaged before abandoning the surrealist style of his early years. In the second part of Chapter II, the four translations mentioned above are examined in chronological order and are analyzed in detail to show Abe's change in style at about the time he wrote "Yume no heishi." Some facts concerning Abe's politics are also explained. Appendix I and II contain the four short stories in chronological order: first the translations and then the originals. Appendix III Is a list of Abe's original works, in order of publication. The corpus of this thesis, four translations, three stories in the original, several novels in translation, as well as the works of criticism consulted, should provide the basis for some tentative conclusions. First, Abe's style is not confessional, but descriptive and explanatory. Second, Abe abandoned the politically directed surrealism of his early days for a more subtle, documentary style. Third, Abe's heroes struggle with outside forces against which they are powerless; their defeat is intended to prove some failing present in all of us. It is hoped that the materials introduced, and the conclusions arrived at in this thesis will help to form the basis for more detailed research.
HOW INTERACTIVE JUSTICE IMPACTS EMPLOYEE COMMITMENT IN MANUFACTURING FIRMS ACROSS RIVERS STATE
Creators: name: Timi, Olabode Wokocha
name: Ezinne, Chioma Amadi
Publisher: name: AYDEN JOURNAL
Year: 2024
Subjects: Interactive Justice, Employee Commitment, Affective Commitment, Normative Commitment, Continuance Commitment and Manufacturing Firms

description: The objective of the study was to examine the impact of interactive justice on employees’ commitment, with focus on manufacturing firms in Rivers State. The study evaluates interactive justice as the dimension while the measures of employee commitment analysed, are affective, normative, and continuance commitment. The explanatory cross-sectional survey research design was adopted for this study. The population of the study consists of nineteen (19) registered manufacturing firms in Rivers State. For the purpose of fairness across the various firms the study adopted random sampling technique in which 10 employees were selected across the various 19 manufacturing firms which gave us a total of 190 respondents. The study adopted a primary source of data. Questionnaires were used to collect data from managers of the manufacturing firms in Rivers State. Structured questionnaire was used as instrument for data collection. The research instrument was called “Interactive Justice questionnaire and Employee Commitment. Cronbach alpha was used to test the internal consistency of the instrument that was used for the study. The Cronbach's Alpha value is .877 indicating that the items are reliable hence they were accepted. The data collected from the administration of the instrument on the respondents were hand scored and entered on frequency tables in excel and exported to SPSS (Statistical Package for Social Sciences. The Mean and standard deviations were used to analyses the research variables. Hypotheses were tested using Pearson’s moment correlation statistics at 0.05 significance level. From the analysis of the study, the finding revealed that interactive justice has positive and significant relationship with affective, normative and continuance commitment. The study therefore, concluded that management abilities to foster good interpersonal relationship and effective channel of information to the employees would positively and significantly influence commitment in the organization. The study recommended that management in the Nigerian manufacturing sector should put in place a reward system that will be fair and just to the employees as it will boast the workers' morale to put more work effort and remain with the organization
ОПРЕДЕЛЕНИЕ ТРИБОТЕХНИЧЕСКИХ ХАРАКТЕРИСТИК КОМПОЗИТНЫХ ИОННО-ПЛАЗМЕННЫХ ПОКРЫТИЙ ДЛЯ ПОРШНЕВЫХ КОЛЕЦ ДИЗЕЛЬНЫХ ДВИГАТЕЛЕЙ
Creators: name: Sagalovich, Alex
Publisher: name: figshare
Year: 2022
Subjects: subject: 90202 Automotive Engineering Materials
subject: FOS: Mechanical engineering
subject: 90201 Automotive Combustion and Fuel Engineering (incl. Alternative/Renewable Fuels)
subject: FOS: Environmental engineering
subject: 91309 Tribology

description: Приведены результаты испытаний по определению влияния состава композитных вакуумных ионно-плазменных покрытий на величину и характер изменения коэффициента трения в зависимости от нагрузки. Определена эффективность использования покрытий для поршневых колец дизельных двигателей.
The evolution of the hard X-ray luminosity function of AGN
Creators: name: Aird, J.
name: Nandra, K.
name: Laird, E. S.
name: Georgakakis, A.
name: Ashby, M. L. N.
name: Barmby, P.
name: Coil, A. L.
name: Huang, J. -S.
name: Koekemoer, A. M.
name: Steidel, C. C.
name: Willmer, C. N. A.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present new observational determinations of the evolution of the 2-10keV X-ray luminosity function (XLF) of AGN. We utilise data from a number of surveys including both the 2Ms Chandra Deep Fields and the AEGIS-X 200ks survey, enabling accurate measurements of the evolution of the faint end of the XLF. We combine direct, hard X-ray selection and spectroscopic follow-up or photometric redshift estimates at z<1.2 with a rest-frame UV colour pre-selection approach at higher redshifts to avoid biases associated with catastrophic failure of the photometric redshifts. Only robust optical counterparts to X-ray sources are considered using a likelihood ratio matching technique. A Bayesian methodology is developed that considers redshift probability distributions, incorporates selection functions for our high redshift samples, and allows robust comparison of different evolutionary models. We find that the XLF retains the same shape at all redshifts, but undergoes strong luminosity evolution out to z~1, and an overall negative density evolution with increasing redshift, which thus dominates the evolution at earlier times. We do not find evidence that a Luminosity-Dependent Density Evolution, and the associated flattening of the faint-end slope, is required to describe the evolution of the XLF. We find significantly higher space densities of low-luminosity, high-redshift AGN than in prior studies, and a smaller shift in the peak of the number density to lower redshifts with decreasing luminosity. The total luminosity density of AGN peaks at z=1.2+/-0.1, but there is a mild decline to higher redshifts. We find >50% of black hole growth takes place at z>1, with around half in Lx<10^44 erg/s AGN.
description: 24 pages, 13 figures, accepted for publication in MNRAS
Assessing Cognitive Load on Web Search Tasks
Creators: name: Gwizdka, Jacek
Publisher: name: arXiv
Year: 2010
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: Information Retrieval (cs.IR)
subject: FOS: Computer and information sciences

description: Assessing cognitive load on web search is useful for characterizing search system features and search tasks with respect to their demands on the searcher's mental effort. It is also helpful for examining how individual differences among searchers (e.g. cognitive abilities) affect the search process. We examined cognitive load from the perspective of primary and secondary task performance. A controlled web search study was conducted with 48 participants. The primary task performance components were found to be significantly related to both the objective and the subjective task difficulty. However, the relationship between objective and subjective task difficulty and the secondary task performance measures was weaker than expected. The results indicate that the dual-task approach needs to be used with caution.
description: Published in the special issue Hot Topic: Cognition and the Web
Divergence preservation in the ADI algorithms for electromagnetics
Creators: name: Smithe, David N.
name: Cary, John R.
name: Carlsson, Johan A.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: This paper contains a study of ADI methods in the presence of charge and current sources. It is shown that there are four significantly distinct cases, with four more related by duality. Of those, only one preserves divergence and, thus, is guaranteed to be stable in the presence of moving charged particles. Computational verification of this property is accomplished by implementation in existing 3D-EMPIC simulation software. Of the other three cases, two are verified unstable, as expected, and one remains stable, despite the lack of divergence preservation. This other stable algorithm is shown to be related to the divergence preserving case by a similarity transformation, effectively providing the complement of the divergence preserving field in the finite-difference energy quantity.
description: "20 pages, 2 figures. Submitted to Journal of Computation Physics"
A piagetian analysis of intellectual performance on first-year university physics examinations
Creators: name: Hewson, Mariana Gay A'Beckett
Publisher: name: University of British Columbia
Year: 2011

description: This thesis is addressed to a problem in classroom practice identified as formative evaluation, that is, the development of a method of utilizing Piaget's theory of intellectual development to evaluate the intellectual performance of students contending with the formal concepts and methods of inquiry presented in a first year physics course with a view to improving instruction in the course. The method of studying the problem required a good understanding and analysis of the relevant aspects of Piaget's theory so that it could be reformulated in such a way as to be unable in identifying formal behaviour of individuals' answers to specially selected examination items. This resulted in the formulation of a methodology in the form of an inventory of descriptors, and a method of analysis for identifying behaviour at the final stage of Piaget's developmental sequence, namely the formal operations stage. Method of Study The inventory of descriptors was used to identify formal operational behaviour of students performance on selected Piaget tasks, providing information concerning their maximum potential level of intellectual development. It was then used to identify physics examination items which required formal operations for their solution and the formal operational behaviour displayed by students in responding to the selected items thereby providing information concerning the actual level of intellectual performance displayed by students in classroom situations. A comparison of identified intellectual behaviours provided information concerning the actual level of intellectual performance displayed by students in classroom situations. A comparison of identified intellectual behaviours provided information concerning the usefulness of such an instrument in education. Results of the Study It was concluded that the inventory of descriptors adequately described and identified intellectual behaviour at the formal operations level, both in student performance on the Piaget tasks, and in student performance on selected items from the physics examination paper. The inventory of descriptors proved to be of potential value to formative evaluation in the classroom situation.
Compactification of the Heterotic Pure Spinor Superstring I
Creators: name: Chandia, Osvaldo
name: Linch, William D.
name: Vallilo, Brenno Carlini
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this paper we begin the study of compactifications of the pure spinor formalism for superstrings. As a first example of such a process we study the case of the heterotic string in a Calabi-Yau background. We explicitly construct a BRST operator imposing N=1 four-dimensional supersymmetry and show that nilpotence implies Kahler and Ricci-flatness conditions. The massless spectrum is computed using this BRST operator and it agrees with the expected result.
description: 20 pages
Additional file 1 of Association between epicardial adipose tissue and incident heart failure mediating by alteration of natriuretic peptide and myocardial strain
Creators: name: Choy, Manting
name: Huang, Yuwen
name: Peng, Yang
name: Liang, Weihao
name: He, Xin
name: Chen, Chen
name: Li, Jiayong
name: Zhu, Wengen
name: Wei, Fang-fei
name: Dong, Yugang
name: Liu, Chen
name: Wu, Yuzhong
Publisher: name: figshare
Year: 2023
Subjects: subject: Medicine
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Physiology
subject: Cancer

description: Additional file 1: Table S1. Detailed diagnostic criteria of study outcomes. Table S2. Baseline right ventricle indexes according to EAT thickness. Table S3. The differences of the shortlisted 14 circulating biomarkers according to EAT thickness. Table S4. The associations of all 85 circulating biomarkers with EAT thickness. Table S5. Baseline characteristics according to occurrence of incident heart failure and LVEF stratification in those with incident heart failure. Table S6. The hazard ratio of EAT and adjusted factors in univariate and multivariate models which assessed their association with incident heart failure. Table S7. Associations of circulating biomarkers and cardiac measures with incident heart failure. Table S8. Mediation analyses of circulating biomarkers and cardiac measures in the association of EAT with the risk of heart failure.
First Steps Toward an Autonomous Accelerator, a Common Project Between DESY and KIT
Creators: name: Eichler, Annika
name: Burkart, Florian
name: Kaiser, Jan
name: Kuropka, Willi
name: Stein, Oliver
name: Xu, Chenran
name: Bründermann, Erik
name: Santamaria Garcia, Andrea
Publisher: name: Joint Accelerator Conferences Website (JACoW)
Year: 2021

description: Reinforcement Learning algorithms have risen in popularity in recent years in the accelerator physics community, showing potential in beam control and in the optimization and automation of tasks in accelerator operation. The Helmholtz AI project "Machine Learning toward Autonomous Accelerators" is a collaboration between DESY and KIT that works on investigating and developing RL applications for the automatic start-up of electron linear accelerators. The work is carried out in parallel at two similar research accelerators: ARES at DESY and FLUTE at KIT, giving the unique opportunity of transfer learning between facilities. One of the first steps of this project is the establishment of a common interface between the simulations and the machine, in order to test and apply various optimization approaches interchangeably between the two accelerators. In this paper we present the first results on the common interface and its application to beam focusing in ARES, and the idea of laser shaping with spatial light modulators at FLUTE.
GRB 080913 at redshift 6.7
Creators: name: Greiner, J.
name: Kruehler, T.
name: Fynbo, J. P. U.
name: Rossi, A.
name: Schwarz, R.
name: Klose, S.
name: Savaglio, S.
name: Tanvir, N. R.
name: McBreen, S.
name: Totani, T.
name: Zhang, B. B.
name: Wu, X. F.
name: Watson, D.
name: Barthelmy, S. D.
name: Beardmore, A. P.
name: Ferrero, P.
name: Gehrels, N.
name: Kann, D. A.
name: Kawai, N.
name: Yoldas, A. Kuepcue
name: Meszaros, P.
name: Milvang-Jensen, B.
name: Oates, S. R.
name: Pierini, D.
name: Schady, P.
name: Toma, K.
name: Vreeswijk, P. M.
name: Yoldas, A.
name: Zhang, B.
name: Afonso, P.
name: Aoki, K.
name: Burrows, D. N.
name: Clemens, C.
name: Filgas, R.
name: Haiman, Z.
name: Hartmann, D. H.
name: Hasinger, G.
name: Hjorth, J.
name: Jehin, E.
name: Levan, A. J.
name: Liang, E. W.
name: Malesani, D.
name: Pyo, T. -S.
name: Schulze, S.
name: Szokoly, G.
name: Terada, H.
name: Wiersema, K.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report on the detection by Swift of GRB 080913, and subsequent optical/near-infrared follow-up observations by GROND which led to the discovery of its optical/NIR afterglow and the recognition of its high-z nature via the detection of a spectral break between the i' and z' bands. Spectroscopy obtained at the ESO-VLT revealed a continuum extending down to lambda = 9400 A, and zero flux for 7500 A < lambda<9400 A, which we interpret as the onset of a Gunn-Peterson trough at z=6.695+-0.025 (95.5% conf. level), making GRB 080913 the highest redshift GRB to date, and more distant than the highest-redshift QSO. We note that many redshift indicators which are based on promptly available burst or afterglow properties have failed for GRB 080913. We report on our follow-up campaign and compare the properties of GRB 080913 with bursts at lower redshift. In particular, since the afterglow of this burst is fainter than typical for GRBs, we show that 2m-class telescopes can identify most high-redshift GRBs.
description: 14 pages, 7 figures, ApJ (subm)
Репрезентация этнической повестки в межкультурной коммуникации в Крыму
Creators: name: Даниленко, Илья
Publisher: name: ООО Цифра
Year: 2023
Subjects: intercultural communication
frame
cultural policy
agenda
ethnic agenda
межкультурная коммуникация
фрейм
культурная политика
повестка дня
этническая повестка

description: Международный научно-исследовательский журнал, Выпуск 12 (138) 2023
Additional file 1 of Insulin signaling in skeletal muscle during inflammation and/or immobilisation
Creators: name: Grunow, Julius J.
name: Gan, Thomas
name: Lewald, Heidrun
name: Martyn, J. A. Jeevendra
name: Blobner, Manfred
name: Schaller, Stefan J.
Publisher: name: figshare
Year: 2023
Subjects: subject: Biochemistry
subject: Medicine
subject: Molecular Biology
subject: Neuroscience
subject: Physiology
subject: FOS: Biological sciences
subject: Biotechnology
subject: Chemical Sciences not elsewhere classified
subject: Immunology
subject: FOS: Clinical medicine
subject: Mental Health
subject: Computational Biology

description: Additional file 1: Appendix.
Exact and Approximate Formulas for Neutrino Mixing and Oscillations with Non-Standard Interactions
Creators: name: Meloni, Davide
name: Ohlsson, Tommy
name: Zhang, He
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We present, both exactly and approximately, a complete set of mappings between the vacuum (or fundamental) leptonic mixing parameters and the effective ones in matter with non-standard neutrino interaction (NSI) effects included. Within the three-flavor neutrino framework and a constant matter density profile, a full set of sum rules is established, which enables us to reconstruct the moduli of the effective leptonic mixing matrix elements, in terms of the vacuum mixing parameters in order to reproduce the neutrino oscillation probabilities for future long-baseline experiments. Very compact, but quite accurate, approximate mappings are obtained based on series expansions in the neutrino mass hierarchy parameter η\equiv Δm^2_{21}/Δm^2_{31}, the vacuum leptonic mixing parameter s_{13} \equiv \sinθ_{13}, and the NSI parameters ε_{αβ}. A detailed numerical analysis about how the NSIs affect the smallest leptonic mixing angle θ_{13}, the deviation of the leptonic mixing angle θ_{23} from its maximal mixing value, and the transition probabilities useful for future experiments are performed using our analytical results.
description: 29 pages, 8 figures, final version published in J. High Energy Phys
title: Acid-base homeostasis orchestrated by NHE1 defines the pancreatic stellate cell phenotype in pancreatic cancer
Creators: name: Pethő, Zoltán
name: Najder, Karolina
name: Beel, Stephanie
name: Fels, Benedikt
name: Neumann, Ilka
name: Schimmelpfennig, Sandra
name: Sargin, Sarah
name: Wolters, Maria
name: Grantins, Klavs
name: Wardelmann, Eva
name: Mitkovski, Mišo
name: Oeckinghaus, Andrea
name: Schwab, Albrecht
Publisher: name: University of Muenster, Institutional Repository MIAMI
Year: 2024
Subjects: subject: 610 Medicine and health

description: Pancreatic ductal adenocarcinoma (PDAC) progresses in an organ with a unique pH landscape, where the stroma acidifies after each meal. We hypothesized that disrupting this pH landscape during PDAC progression triggers pancreatic stellate cells (PSCs) and cancer-associated fibroblasts (CAFs) to induce PDAC fibrosis. We revealed that alkaline environmental pH was sufficient to induce PSC differentiation to a myofibroblastic phenotype. We then mechanistically dissected this finding, focusing on the involvement of the Na+/H+ exchanger NHE1. Perturbing cellular pH homeostasis by inhibiting NHE1 with cariporide partially altered the myofibroblastic PSC phenotype. To show the relevance of this finding in vivo, we targeted NHE1 in murine PDAC (KPfC). Indeed, tumor fibrosis decreased when mice received the NHE1-inhibitor cariporide in addition to gemcitabine treatment. Moreover, the tumor immune infiltrate shifted from granulocyte rich to more lymphocytic. Taken together, our study provides mechanistic evidence on how the pancreatic pH landscape shapes pancreatic cancer through tuning PSC differentiation.
description: Finanziert durch den Open-Access-Publikationsfonds der Universität Münster.
Regge Trajectories of Quark Gluon Bags
Creators: name: Bugaev, K. A.
name: Zinovjev, G. M.
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Using an exactly solvable statistical model we discuss the equation of state of large/heavy and short-living quark gluon plasma (QGP) bags. We argue that the large width of the QGP bags explains not only the observed deficit in the number of hadronic resonances, but also clarifies the reason why the heavy QGP bags cannot be directly observed even as metastable states in a hadronic phase. Also the Regge trajectories of large and heavy QGP bags are established both in a vacuum and in a strongly interacting medium. It is shown that at high temperatures the average mass and width of the QGP bags behave in accordance with the upper bound of the Regge trajectory asymptotics (the linear asymptotics), whereas for temperatures below T_H/2 (T_H is the Hagedorn temperature) they obey the lower bound of the Regge trajectory asymptotics (the square root one). Thus, for T < T_H/2 the spin of the QGP bags is restricted from above, whereas for T> T_H/2 these bags demonstrate the standard Regge behavior consistent with the string models.
description: Talk at the Bogolyubov Kyiv Conference
Statistical model formulation for power systems
Creators: name: Mumford, Donald Gregory
Publisher: name: University of British Columbia
Year: 2011

description: An investigation has been undertaken to ascertain how readily a power system lends itself to statistical modelling. A nonlinear state variable model has been derived in terms of measurable states. This model is linear in its coefficients which are evaluated by the least squares fitting technique of regression analysis. The statistical model's performance is evaluated by comparison of its predicted system responses with those predicted by Park's formulation, and with those produced by a laboratory power system model.
Diagnostics of longitudinal bunch instabilities at KARA
Creators: name: Kehrer, Benjamin
name: Brosi, Miriam
name: Bründermann, Erik
name: Funkner, Stefan
name: Nasse, Michael J.
name: Niehues, Gudrun
name: Patil, Meghana M.
name: Steinmann, Johannes L.
name: Müller, Anke-Susanne
Publisher: name: Europäische Organisation für Kernforschung (CERN)
Year: 2020

description: KARA, the Karlsruhe Research Accelerator, can be operated in different modes, including a short-bunch mode. During this mode, where the dispersion is stretched in order to reduce the momentum-compaction factor, micro-bunching instability can occur. At KARA, several measurement setups and techniques are used to investigate this instability further with the long-term perspective to suppress and control it. In this contribution, we give an overview about the different setups and the results achieved during the past years.
Optimum Statistical Test Procedure
Creators: name: Singh, Rajesh
name: Singh, Jayant
name: Smarandache, Florentin
Publisher: name: arXiv
Year: 2009
Subjects: subject: General Mathematics (math.GM)
subject: FOS: Mathematics
subject: 62F03

description: In this paper we obtain a test which minimizes the sum of the two error probabilities irrespective of whether $σ^2$ is known or unknown.
description: 16 pages
The nature and function of knowledge in morality for the Cambridge Platonists
Creators: name: Bonney, WL
Publisher: name: University Of Tasmania
Year: 2023

description: The problem of the relationship of knowledge to morality has always been a vexed one in philosophy, since, and even before, the statement of the Socratic dictum: Virtue is knowledge. Most ethical theories, if analysed, contain a theory of the relationship of a certain kind of knowledge to virtue, but it is in the precise nature of this knowledge and in the nature of the relationship it bears to virtue that there is disagreement.