cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Compact periods of Eisenstein series of orthogonal groups of rank one
Creators: name: Boavida, João Pedro
Publisher: name: arXiv
Year: 2009
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11F67 (Primary) 11R42, 11S40 (Secondary)

description: Let G=O(n+3) be an orthogonal group of rank one and H=O(n+2) an anisotropic subgroup. We unwind the period along H of a spherical Eisenstein series of G against a cuspform of H into an Euler product and evaluate the local factors at odd primes.
description: 19 pages; submitted. Changes from version 1: old sections 3 and 7 removed for conciseness. All else: minor mistakes fixed; presentation substantially revised (results unchanged); discussion at bad odd primes added
Supplemental Figures and Tables
Creators: name: Mäntyselkä, Sakari
Publisher: name: figshare
Year: 2023
Subjects: classificationCode: 310103
subject: Cell metabolism
classificationCode: 310902
subject: Animal cell and molecular biology

description: Supplementary material for the article: Serine synthesis pathway enzyme PHGDH is critical for muscle cell biomass, anabolic metabolism and mTORC1 signaling.Authors: Sakari Mäntyselkä, Kalle Kolari, Philipp Baumert, Laura Ylä-Outinen, Lauri Kuikka, Suvi Lahtonen, Perttu Permi, Henning Wackerhage, Elina Kalenius, Riikka Kivelä, Juha J. Hulmi.Journal: American Journal of Physiology-Endocrinology and Metabolism
Foregrounds for observations of the cosmological 21 cm line: II. Westerbork observations of the fields around 3C196 and the North Celestial Pole
Creators: name: Bernardi, G.
name: de Bruyn, A. G.
name: Harker, G.
name: Brentjens, M. A.
name: Ciardi, B.
name: Jelić, V.
name: Koopmans, L. V. E.
name: Labropoulos, P.
name: Offringa, A.
name: Pandey, V. N.
name: Schaye, J.
name: Thomas, R. M.
name: Yatawatta, S.
name: Zaroubi, S.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: In the coming years a new insight into galaxy formation and the thermal history of the Universe is expected to come from the detection of the highly redshifted cosmological 21 cm line. The cosmological 21 cm line signal is buried under Galactic and extragalactic foregrounds which are likely to be a few orders of magnitude brighter. Strategies and techniques for effective subtraction of these foreground sources require a detailed knowledge of their structure in both intensity and polarization on the relevant angular scales of 1-30 arcmin. We present results from observations conducted with the Westerbork telescope in the 140-160 MHz range with 2 arcmin resolution in two fields located at intermediate Galactic latitude, centred around the bright quasar 3C196 and the North Celestial Pole. They were observed with the purpose of characterizing the foreground properties in sky areas where actual observations of the cosmological 21 cm line could be carried out. The polarization data were analysed through the rotation measure synthesis technique. We have computed total intensity and polarization angular power spectra. Total intensity maps were carefully calibrated, reaching a high dynamic range, 150000:1 in the case of the 3C196 field. [abridged]
description: 20 pages, 22 figures, accepted for publication in A&A. A version with full resolution figures is available at http://www.astro.rug.nl/~bernardi/NCP_3C196/bernardi.pdf
Phylogenomics, biogeography and conservation prioritisation of Nepenthaceae
Creators: name: Murphy, Bruce
Publisher: name: Imperial College London
Year: 2020

description: Nepenthaceae are a family of carnivorous plants mainly from Southeast Asia but with geographical outliers reaching Madagascar and New Caledonia. They are highly collectable because of their attractive and unusual morphology. Taxonomists have considerably increased the number of described species in recent decades while other research has revealed remarkable ecological variation suggesting an adaptive radiation. Despite considerable public and scientific interest, limited phylogenetic knowledge hinders further understanding of this interesting family. Incorporating many previously unsampled species and using high throughput sequencing this study investigates their phylogeny, biogeography, evolutionary history and conservation status. I perform phylogenetic analyses using a target capture approach with 353 low copy nuclear loci and 197 samples representing 151 species covering all the main geographic regions and taxonomic sections and with multiple samples of geographically widespread species. Supermatrix and summary coalescent analyses produce similar results, revealing two major Southeast Asian lineages, with subclades geographically defined to a high degree. My phylogenetic analyses are then used to investigate the biogeographical history and evolutionary radiation of the family, with ancestral reconstructions and investigations of diversification rate and species-pair trait divergence. I find an increase in diversification rate between two major Southeast Asian clades and investigate this in relation to altitude, substrate and range-size. Biogeographical analysis indicates an out-of-Borneo pattern for several major lineages, with little internal migration to this island. Finally, I explore phylogenetically informed conservation prioritisation of Nepenthes, using IUCN Red List assessments combined with my phylogenetic results to perform a HEDGE analysis, additionally investigating regional patterns and the relationship between evolutionary distinctiveness and extinction risk.
High Redshift Galaxies in the Hubble Ultra Deep Field
Creators: name: Hathi, Nimish P.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: My dissertation presents results from three recent investigations in the Hubble Ultra Deep Field (HUDF) focusing on understanding structural and physical properties of high redshift galaxies. Here I summarize results from these studies. This thesis work was conducted at Arizona State University under the guidance of Prof. Rogier Windhorst and Prof. Sangeeta Malhotra.
description: Accepted for publication as Dissertation Summary in PASP (2 pages; emulateapj). My full dissertation in PDF format (132 pages) is available at http://web.me.com/hathi/asu_thesis_files/hathi_thesis.pdf
The Andyrchy-BUST experiment: primary spectrum and composition around the knee
Creators: name: Petkov, V. B.
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The main goal of the Andyrchy-BUST experiment is to study the primary cosmic rays spectrum and composition around the knee. The experimental data on the knee, as observed in the electromagnetic and high energy muon components, are presented. The electromagnetic component in our experiment is measured using the "Andyrchy" EAS array. High energy muon component (with 230 GeV threshold energy of muons) is measured using the Baksan Underground Scintillation Telescope (BUST). The location of the "Andyrchy" right above the BUST gives us a possibility for simultaneous measurements of both EAS components.
description: 6 pages, 10 figures. Highlight Talk given at the 31st International Cosmic Ray Conference, July 07-15, 2009, Lodz, Poland, to be published in the conference proceedings. Added references.
Curves over every global field violating the local-global principle
Creators: name: Poonen, Bjorn
Publisher: name: arXiv
Year: 2009
Subjects: subject: Number Theory (math.NT)
subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 11G30, 14H25

description: There is an algorithm that takes as input a global field k and produces a curve over k violating the local-global principle. Also, given a global field k and a nonnegative integer n, one can effectively construct a curve X over k such that #X(k)=n and X has points over every completion of k.
description: 5 pages
THE ROLE OF PARENTS IN CHILD EDUCATION
Creators: name: Rahimberdiyeva, Mahfuza
name: Karimova, Mubinakhan
name: Murodova, Nargis
Publisher: name: Zenodo
Year: 2023

description: The article describes the crucial role of parents in raising children, various aspects of parental responsibility. It emphasizes the importance of emotional education, where parents create a safe environment for their children, developing emotional stability and self-esteem. The role of parents in setting boundaries and instilling values is explored, and the importance of moral guidance in child development is emphasized.
Hearing Delzant polytopes from the equivariant spectrum
Creators: name: Dryden, Emily B.
name: Guillemin, Victor
name: Sena-Dias, Rosa
Publisher: name: arXiv
Year: 2009
Subjects: subject: Differential Geometry (math.DG)
subject: Symplectic Geometry (math.SG)
subject: Spectral Theory (math.SP)
subject: FOS: Mathematics
subject: 58J50, 53D20

description: Let M^{2n} be a symplectic toric manifold with a fixed T^n-action and with a toric Kähler metric g. Abreu asked whether the spectrum of the Laplace operator $Δ_g$ on $\mathcal{C}^\infty(M)$ determines the moment polytope of M, and hence by Delzant's theorem determines M up to symplectomorphism. We report on some progress made on an equivariant version of this conjecture. If the moment polygon of M^4 is generic and does not have too many pairs of parallel sides, the so-called equivariant spectrum of M and the spectrum of its associated real manifold M_R determine its polygon, up to translation and a small number of choices. For M of arbitrary even dimension and with integer cohomology class, the equivariant spectrum of the Laplacian acting on sections of a naturally associated line bundle determines the moment polytope of M.
description: 23 pages, 9 figures; v2 is published version
Majorana Fermions and a Topological Phase Transition in Semiconductor-Superconductor Heterostructures
Creators: name: Lutchyn, Roman M.
name: Sau, Jay D.
name: Sarma, S. Das
Publisher: name: arXiv
Year: 2010
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We propose and analyze theoretically an experimental setup for detecting the elusive Majorana particle in semiconductor-superconductor heterostructures. The experimental system consists of one-dimensional semiconductor wire with strong spin-orbit Rashba interaction embedded into a superconducting quantum interference device. We show that the energy spectra of the Andreev bound states at the junction are qualitatively different in topologically trivial (i.e., not containing any Majorana) and nontrivial phases having an even and odd number of crossings at zero energy, respectively. The measurement of the supercurrent through the junction allows one to discern topologically distinct phases and observe a topological phase transition by simply changing the in-plane magnetic field or the gate voltage. The observation of this phase transition will be a direct demonstration of the existence of Majorana particles.
description: 4 pages, 3 figures, final version published in Phys. Rev. Lett
Spark spectra of thallium and lead
Creators: name: Gutmann, Francis
Publisher: name: University of British Columbia
Year: 2011

description: The atomic spectra of Thallium were excited and photographed in the spectral region from 340 to 9000 Å , using both an electrodeless discharge and a spark-in-Helium as light sources. The single electron Rydberg series have been extended in TI III. The ionization potential of TI III and Pb IV was determined from hydrogenic terms and found to be 240773 ± 5 cm⁻¹ and 342438 ± 5 cm⁻¹ respectively. The dipole polarizability of TI III was found to be 2.53 ± .02 a³₀ and of Pb IV 4.37 ± .04 a³₀. Using a line list previously obtained in this laboratory, terms belonging to three electron configuration were established in TI III and Pb IV. The 5d⁹ ns series was extended in TI IV and an ionization potential of 412500 ± 300 cm⁻¹ arrived at. In TI IV and Pb V the two electron configurations 5d⁹ 6d, 5d⁹ 5f, 5d⁹ 7p and 5d⁸ 6s² were partially established while a number of terms belonging to the complex 5d⁸ 6s6p configuration could be identified as well. The analysis of TI II was extended by completing the 5d¹º 6p² configuration and identifying a number of odd and even parity terms above the first ionization limit. These were tentatively assigned to the 5d¹º 6p7p, 5d⁹ 6s² 7s, 5d⁹ 6s² 6d, 5d⁹6s6p² and the 5d¹º6p7s configurations. The number of classified TI III lines, involved in this extension of the term analysis, has increased from 247 to 579. In the TI IV spectrum the increase in classified lines has been from 35 to 308 lines. In lead spectra the increase in Pb IV has been from 134 lines to 460, and in Pb V the corresponding increase is from 200 to 303 lines.
THE IMPORTANCE OF INCLUSIVE EDUCATION IN PEDAGOGY.
Creators: name: Rahimberdiyeva, Mahfuza
name: Tashmirzayev, Ilyasbek
name: Sultanov, Farhad
Publisher: name: Zenodo
Year: 2023

description: In this article, ideas are presented about ways to improve the lives of children with developmental disabilities, help them find their place in society, and the role of education in this.
An Introduction to Cascading Gravity and Degravitation
Creators: name: de Rham, Claudia
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Cascading gravity is an explicit realization of the idea of degravitation, where gravity behaves as a high-pass filter. This could explain why a large cosmological constant does not backreact as much as anticipated from standard General Relativity. The model relies on the presence of at least two infinite extra dimensions while our world is confined on a four-dimensional brane. Gravity is then four-dimensional at short distances and becomes weaker and weaker at larger distances.
description: accepted in the Canadian Journal of Physics, to appear in a special issue devoted to the proceedings of Theory Canada 4
Quilted Floer Cohomology
Creators: name: Wehrheim, Katrin
name: Woodward, Chris
Publisher: name: arXiv
Year: 2009
Subjects: subject: Symplectic Geometry (math.SG)
subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: 53D40, 57R56

description: We generalize Lagrangian Floer cohomology to sequences of Lagrangian correspondences. For sequences related by the geometric composition of Lagrangian correspondences we establish an isomorphism of the Floer cohomologies. We give applications to calculations of Floer cohomology, displaceability of Lagrangian correspondences, and transfer of displaceability under geometric composition.
description: minor corrections and updated references
A methodology and an implementation to perform live time traversal queries on RDF datasets
Creators: name: Massari, Arcangelo
Publisher: name: Zenodo
Year: 2021
Subjects: OpenCitations
provenance
change-traking
time-traversal
Python

description: Abstract Purpose This dissertation introduces a methodology to perform live time-traversal queries on RDF datasets and software based on this procedure. It offers a solution to manage provenance and change-tracking in the Semantic Web. Although they are crucial factors in ensuring verifiability and trust, there is no standard metadata representation model to achieve this result. Moreover, the leading knowledge bases – DBpedia, Wikidata, Yago, and the Dynamic Linked Data Observatory – do not use RDF to track changes and enable time-agnostic queries. Methodology  The OpenCitations provenance model was adopted to fill this gap. It expresses provenance metadata via the Provenance Ontology and saves deltas in separate named graphs as SPARQL update strings. This approach enables to restore an entity to a specific snapshot in a straightforward way by applying the inverse operations, i.e., deletions instead of additions and vice versa. Additionally, only those portions that are strictly necessary to answer the user’s question are recovered to avoid reconstructing all past versions of a dataset before running a time traversal query. This method was implemented in a Python library following the Test-Driven Development, and benchmarks were executed on a dataset created for the purpose. Findings and limitations This procedure has proven effective for any materialization. Regarding structured queries, they are efficient if all subjects are known or deductible, while isolated triples require a significant amount of time and resources. Future research should focus on optimizing specific queries containing isolated triples to avoid reconstructing portions of the past that are not needed to fulfill the query. Originality To date, the Time-Agnostic Library is the only software enabling all the time-related retrieval functionalities without pre-indexing data. It can materialize versions and deltas and run structured queries on them, either considering the entire dataset history or a specified time interval.
Black odorous water concentrating by forward osmosis: rejection performance of characteristic pollutants based on cation exchange
Creators: name: Pan, Ting
name: Wang, Kai-Tong
name: He, Jia-Ying
name: Zhang, Yong
name: Ni, Shou-Gao
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Biophysics
subject: Biochemistry
subject: Space Science
subject: Microbiology
subject: FOS: Biological sciences
subject: Chemical Sciences not elsewhere classified
subject: Ecology
subject: Biological Sciences not elsewhere classified
subject: Marine Biology

description: This study aimed to investigate pollutant concentration and nitrogen interception characteristics of a forward osmosis (FO) process for concentrating black odorous water. The membrane cell was operated in active layer facing feed solution (AL-FS) mode with aquaporin (AQP) as the membrane material and NaCl solution as the draw solution (DS). The organic pollutants (COD), TP, NH+ 4-N, NO- 3-N, TN, Fe and Mn in black odorous water were concentrated non-intermittently for 24 hours, and their interception characteristics were investigated. The results showed that the average interception rates of COD, TP, NO- 3-N, TN, Fe and Mn were 97.2%, 98.0%, 58.7%, 54.3%, 61.8% and 60.0%, respectively, while the average interception rate of NH+ 4-N was only 1.27%-3.47%. To explore the characteristics of nitrogen interception, a comparison was conducted between AQP membrane and thin film composite (TFC) membrane. Because the surface electronegativity of AQP membrane was stronger than that of TFC, the effect of cation exchange on ammonia nitrogen interception was more serious with AQP membrane. With NaCl solution as DS, the reverse osmosis flux of Na+ was (0.53 ± 0.02 mol·m-2·h-1), which was significantly higher than that of Cl- (0.29 ± 0.03 mol·m-2·h-1) (P < 0.05). The interception effect of AQP membrane on TN was related to the proportion of NH+ 4-N in TN. The pretreatment of black odorous water by aeration could transform part of NH+ 4-N into NO- 3-N, and reduce the negative effect of cation exchange effect on nitrogen interception. The TN interception rate increased from 54.3% to 66.1%.
Glassy Dynamics Under Superhigh Pressure
Creators: name: Pronin, A. A.
name: Kondrin, M. V.
name: Lyapin, A. G.
name: Brazhkin, V. V.
name: Volkov, A. A.
name: Lunkenheimer, P.
name: Loidl, A.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Nearly all glass-forming liquids feature, along with the structural alpha-relaxation process, a faster secondary process (beta-relaxation), whose nature belongs to the great mysteries of glass physics. However, for some of these liquids, no well-pronounced secondary relaxation is observed. A prominent example is the archetypical glass-forming liquid glycerol. In the present work, by performing dielectric spectroscopy under superhigh pressures up to 6 GPa, we show that in glycerol a significant secondary relaxation peak appears in the dielectric loss at P > 3 GPa. We identify this beta-relaxation to be of Johari-Goldstein type and discuss its relation to the excess wing. We provide evidence for a smooth but significant increase of glass-transition temperature and fragility on increasing pressure.
description: 5 pages, 5 figures, final version with minor changes according to referee demands and corrected Figs 1 and 2
Multivariable polynomial injections on rational numbers
Creators: name: Poonen, Bjorn
Publisher: name: arXiv
Year: 2009
Subjects: subject: Number Theory (math.NT)
subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 11C08, 11G30, 11G35

description: For each number field k, the Bombieri-Lang conjecture for k-rational points on surfaces of general type implies the existence of a polynomial f(x,y) in k[x,y] inducing an injection k x k --> k.
description: 4 pages
A quantum mechanical treatment of the relativistic scattering of light by the sun
Creators: name: Feser, Siegfried
Publisher: name: University of British Columbia
Year: 2011

description: This thesis concerns itself with the applicability of quantum field methods, in the fixed field approximation, to problems involving a weak gravitational field. After introducing general scattering relations, various classic problems are reviewed to illustrate various approaches to solving scattering problems. Newtonian and quantum mechanical field methods are illustrated using Coulomb scattering. Classical relativity is used to solve the bending of light rays by the sun. Finally, quantum field methods are used to solve the scattering of polarized photons by the sun. The additional problems of scattering of light by a mass distribution and by a rotating mass are calculable using this method.
Relativistic disc reflection in the extreme NLS1 IRAS13224-3809
Creators: name: Ponti, G.
name: Gallo, L. C.
name: Fabian, A. C.
name: Miniutti, G.
name: Zoghbi, A.
name: Uttley, P.
name: Ross, R. R.
name: Vasudevan, R. V.
name: Tanaka, Y.
name: Brandt, W. N.
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 a spectral variability study of the XMM-Newton and Suzaku observations of one of the most extreme Narrow Line Seyfert 1 galaxies, IRAS13224-3809. The X-ray spectrum is characterized by two main peculiar features, i) a strong soft excess with a steep rise below about 1.3 keV and ii) a deep drop in flux above 8.2 keV. We focus here on a reflection-based interpretation which interprets both features, as well as the large soft excess, in terms of partially ionized reflection off the inner accretion disc. We show that the two peculiar spectral features mentioned above can be reproduced by two relativistic emission lines due to Fe K and Fe L. The lines are produced in the inner accretion disc and independently yield consistent disc parameters. We argue that the high L/K intensity ratio is broadly consistent with expectations from an ionized accretion disc reflection, indicating that they belong to a single ionized reflection component. The spectral shape, X-ray flux, and variability properties are very similar in the XMM-Newton and Suzaku observations, performed about 5 years apart. The overall X-ray spectrum and variability can be described by a simple two-component model comprising a steep power law continuum plus its ionised reflection off the inner accretion disc. In this model, a rapidly rotating Kerr black hole and a steep emissivity profile are required to describe the data. The simultaneous detection of broad relativistic Fe L and K lines in IRAS 13224-3809 follows that in another extreme NLS1 galaxy, 1H0707-495. Although the data quality for IRAS13224-3809 does not allow us to rule out competing models as in 1H0707-495, we show here that our reflection-based interpretation describes in a self-consistent manner the available data and points towards IRAS13224-3809 being a very close relative of 1H0707-495 in terms of both spectral and variability properties.
description: MNRAS in press
Mathematical Religionism
Creators: name: Cortez, Cedric Jr.
Publisher: name: Zenodo
Year: 2023

description: The ontology of mathematics and its relation to the description of scientific theories has been an increasingly relevant issue as scientific knowledge progress. With this, debates regarding the truth-value of mathematics have implications on its use in the explanation of physical phenomena, of which many philosophers holding a nominalist position concede to its indispensability. In this paper, I will argue three claims: (1) mathematical objects not true-as abstract objects do not exist, (2) mathematics is dispensable to scientific theories, and (3) the truth-value of mathematics is falsely perceived. Mathematically imbued scientific theories such as quantum field theory derive from scientific inquiries that specifically aim to approach aspects of the universe which can be explained by mathematics. Through conceptual analysis, the paper will incorporate a retrospective analysis of mathematically imbued theories, fictionalism, and Kuhnian analysis in order to develop a version of fictionalist anti-realism that emphasizes the religionist perspective in mathematics in empirical science today while maintaining the rejection of the existence of mathematical objects.
Non-canonical generalizations of slow-roll inflation models
Creators: name: Tzirakis, Konstantinos
name: Kinney, William H.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We consider non-canonical generalizations of two classes of simple single-field inflation models. First, we study the non-canonical version of "ultra-slow roll" inflation, which is a class of inflation models for which quantum modes do not freeze at horizon crossing, but instead evolve rapidly on superhorizon scales. Second, we consider the non-canonical generalization of the simplest "chaotic" inflation scenario, with a potential dominated by a quartic (mass) term for the inflaton. We find a class of related non-canonical solutions with polynomial potentials, but with varying speed of sound. These solutions are characterized by a constant field velocity, and we dub such models {\it isokinetic} inflation. As in the canonical limit, isokinetic inflation has a slightly red-tilted power spectrum, consistent with current data. Unlike the canonical case, however, these models can have an arbitrarily small tensor/scalar ratio. Of particular interest is that isokinetic inflation is marked by a correlation between the tensor/scalar ratio and the amplitude of non-Gaussianity such that parameter regimes with small tensor/scalar ratio have {\it large} associated non-Gaussianity, which is a distinct observational signature.
description: 12 pages, 3 figures, LaTeX; V2: version submitted to JCAP. References added
РАЗРАБОТКА ДИСТАНЦИОННОГО УПРАВЛЕНИЯ ТОКАРНО-ВИНТОРЕЗНОГО СТАНКА
Creators: name: Ёркин Кадиров
name: Абдухалил Самадов
Publisher: name: TECHика
Year: 2020
Subjects: Система автоматического управления
станок НТ-250
машиностроения
принципиальная схема
Raspberry Pi 3
Python
MATLAB
Simulink

description: Основные показатели эффективности современных промышленных предприятий определяются его конкурентоспособностью и рентабельностью. Чтобы добиться успеха на рынке машиностроения, промышленное предприятие должно не только производить качественный продукт, но и само оборудование должно быть качественным и производительным. В этой статье описывается, как добиться высокой эффективности и прибыльности при создании устройства дистанционного управления.
Computing the Spectrum of a Heterotic Flux Vacuum
Creators: name: Adams, Allan
name: Lapan, Joshua M.
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We compute the massless spectra of a set of flux vacua of the heterotic string. The vacua we study include well-known non-Kahler T^2-fibrations over K3 with SU(3) structure and intrinsic torsion. Following gauged linear sigma models of these vacua into phases governed by asymmetric Landau-Ginzburg orbifolds allows us to compute the spectrum using generalizations of familiar LG-orbifold techniques. We study several four- and six-dimensional examples with N=2 spacetime supersymmetry in detail.
description: 1+49 pages, updated to JHEP version (added appendix and minor revisions)
EFFECTIVE WAYS TO ORGANIZE A LESSON
Creators: name: Rahimberdiyeva, Mahfuza
Publisher: name: Zenodo
Year: 2023

description: This article explores the basic techniques used in organizing a lesson to achieve optimal learning outcomes. It emphasizes the importance of introductions for setting clear objectives, strategic lesson planning, and engaging students. The sequential organization and use of visual aids are emphasized as key components of understanding and accommodating different learning styles. Interactive activities and technology integration are offered to encourage active student participation and enhance the overall learning experience. The article highlights the importance of incorporating a variety of formative and summative assessment strategies to measure student understanding and provide timely feedback. The importance of completion and summarization is emphasized to reinforce key concepts, which contributes to a holistic learning experience. Overall, the article is a valuable guide for teachers, emphasizing multifaceted approaches to effective lesson planning and subsequent successful teaching and learning.
Gravitational Lensing by Black Holes
Creators: name: Bozza, V.
Publisher: name: arXiv
Year: 2009
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We review the theoretical aspects of gravitational lensing by black holes, and discuss the perspectives for realistic observations. We will first treat lensing by spherically symmetric black holes, in which the formation of infinite sequences of higher order images emerges in the clearest way. We will then consider the effects of the spin of the black hole, with the formation of giant higher order caustics and multiple images. Finally, we will consider the perspectives for observations of black hole lensing, from the detection of secondary images of stellar sources and spots on the accretion disk to the interpretation of iron K-lines and direct imaging of the shadow of the black hole.
description: Invited article for the GRG special issue on lensing (P. Jetzer, Y. Mellier and V. Perlick Eds.). 31 pages, 12 figures
GRBs as standard candles: There is no "circularity problem" (and there never was)
Creators: name: Graziani, Carlo
Publisher: name: arXiv
Year: 2010
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The 2002 discovery of the "Amati Relation" of GRB spectra created the possibility that this and other correlations of GRB phenomenology might be used to make GRBs into standard candles. One recurring apparent difficulty with this program has been that some of the primary observational quantities to be fit as "data" - the isotropic-equivalent prompt energy $E_{iso}$ and the collimation-corrected "total" prompt energy energy $E_γ$ - depend for their construction on the very cosmological models that they are supposed to help constrain. This is the so-called "circularity problem" of standard candle GRBs. This paper is intended to point out that the circularity problem is not in fact a problem at all, except to the extent that it amounts to a self-inflicted wound. It arises essentially because of an unfortunate choice of data variables, such as $E_{iso}$, which are unnecessarily model-dependent. If, instead, the empirical correlations of GRB phenomenology which are formulated in source-variables are {\it mapped to the primitive observational variables} (such as fluence) and compared to the observations in that space, then all circularity disappears. I also indicate here a set of procedures for encoding high-dimensional empirical correlations in a "Gaussian Tube" smeared model that includes both the correlation and its intrinsic scatter, and how that source-variable model may easily be mapped to the space of primitive observables and fashioned into a likelihood. I discuss the projections of such Gaussian tubes into sub-spaces, which may be used to incorporate data from GRB events that may lack some element of the data (for example, GRBs without ascertained jet-break times). In this way, a large set of inhomogeneously observed GRBs may be assimilated into a single analysis, so long as each possesses at least two correlated data attributes.
description: 10 pages, to appear in New Astronomy
སྐར་ཅུང་རྡོ་རང་ལ་རགས་ཙམ་དཔྱད་པ་
Creators: name: Anon
Publisher: name: Zenodo
Year: 2004
Subjects: སྐར་ཅུང་

description: སྐར་ཅུང་རྡོ་རང་ལ་རགས་ཙམ་དཔྱད་པ་
Wave propagation in rarefied gases
Creators: name: Bejar Hurtado, Jose Antonio
Publisher: name: University of British Columbia
Year: 2011

description: This thesis describes an investigation of the propagation of a pressure wave, through a long straight pipe, in a rarefied atmosphere of Argon. This phenomenon is approximately analogous to thermal wave propagation in the boundary scattering limit. Casimir and Ziman studied this latter phenomenon for the steady state case. P.W. Matthews extended their theory to the non-steady state and found a diffusion coefficient D depending on L. Smoluchowski studied the corresponding phenomenon in gases for the steady state and again P.W. Matthews extended the theory to the non-steady state, and again found a dependence of D on L. Therefore at the low frequency limit a wave pressure velocity would depend on L. An experiment was set up in order to produce a wave pressure and measure its velocity as a function of the frequency and the pressure and hence L. Results have been obtained and no dependence on the pressure has been observed.
On Bayesian learning from Bernoulli observations
Creators: name: Bissiri, Pier Giovanni
name: Walker, Stephen G.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Statistics Theory (math.ST)
subject: FOS: Mathematics

description: We provide a reason for Bayesian updating, in the Bernoulli case, even when it is assumed that observations are independent and identically distributed with a fixed but unknown parameter $θ_0$. The motivation relies on the use of loss functions and asymptotics. Such a justification is important due to the recent interest and focus on Bayesian consistency which indeed assumes that the observations are independent and identically distributed rather than being conditionally independent with joint distribution depending on the choice of prior.
description: This is a personal 19-pages manuscript version of the article that has been accepted for publication by Journal of Statistical Planning and Inference
Combinatorics of symbolic Rees algebras of edge ideals of clutters
Creators: name: Martinez-Bernal, Jose
name: Renteria, Carlos
name: Villarreal, Rafael H.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Commutative Algebra (math.AC)
subject: Combinatorics (math.CO)
subject: Optimization and Control (math.OC)
subject: FOS: Mathematics
subject: 13A30, 05C65

description: Let C be a clutter and let I be its edge ideal. We present a combinatorial description of the minimal generators of the symbolic Rees algebra Rs(I) of I. It is shown that the minimal generators of Rs(I) are in one to one correspondence with the irreducible parallelizations of C. From our description some major results on symbolic Rees algebras of perfect graphs and clutters will follow. As a byproduct, we give a method, using Hilbert bases, to compute all irreducible parallelizations of C along with all the corresponding vertex covering numbers.
description: Contemp. Math., to appear
The large-scale shock in the cluster of galaxies Hydra A
Creators: name: Simionescu, A.
name: Roediger, E.
name: Nulsen, P. E. J.
name: Brüggen, M.
name: Forman, W. R.
name: Böhringer, H.
name: Werner, N.
name: Finoguenov, A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We analyzed a deep XMM-Newton observation of the cluster of galaxies Hydra A, focusing on the large-scale shock discovered as a surface brightness discontinuity in Chandra images. The shock front can be seen both in the pressure map and in temperature profiles in several sectors. The Mach numbers determined from the temperature jumps are in good agreement with the Mach numbers derived from EPIC/pn surface brightness profiles and previously from Chandra data and are consistent with M~1.3. The estimated shock age in the different sectors using a spherically symmetric point explosion model ranges between 130 and 230 Myr and the outburst energy between 1.5 and 3e61 ergs. The shape of the shock seen in the pressure map can be approximated with an ellipse centered 70 kpc towards the NE from the cluster center. We aimed to develop a better model that can explain the offset between the shock center and the AGN and give a consistent result on the shock age and energy. To this end, we performed 3D hydrodynamical simulations in which the shock is produced by a symmetrical pair of AGN jets launched in a spherical galaxy cluster. As an explanation of the observed offset of the shock center, we consider large-scale bulk flows in the intracluster medium. The simulation successfully reproduces the size, ellipticity, and average Mach number of the observed shock front. The predicted age of the shock is 160 Myr and the total input energy 3e61 erg. Both values are within the range determined by the spherically symmetric model. Matching the observed 70 kpc offset of the shock ellipse from the cluster center requires large-scale coherent motions with a high velocity of 670 km/s. We discuss the feasibility of this scenario and offer alternative ways to produce the offset and to further improve the simulation.
description: 14 pages, accepted for publication in A&A, minor revision compared to previous version
PSYCHOLOGICAL CHARACTERISTICS OF THE ORIGIN OF CHILDREN WITH DIFFICULT UPBRINGINGS.
Creators: name: Yuldasheva, Malokhat
name: Odilova, Yokutan
name: Rakhimov, Shokhrukhbek
Publisher: name: Zenodo
Year: 2023

description: The article contains the content of the increase in the number of children with difficult upbringings, the negative aspects of their behavior from a psychological point of view, the role of social factors causing them to acquire a new color, and their consequences.
Knight shift and quadrupole interaction in single crystal magnesium
Creators: name: Dougan, Patrick Daniel
Publisher: name: University of British Columbia
Year: 2011

description: The nuclear magnetic resonance in single crystal magnesium has been studied at 4.2°K. The isotropic Knight shift, the anisotropic Knight shift and the quadrupole interaction have been investigated. The values for the parameters measured are K = (0.1127 ± 0.0005)%, K' = (0.0004 ± 0.0002)%, e²qQ/h = 324 ± 6 KHz. These results are compared with those of Rowland in powdered magnesium to reveal the Knight shift is independent of temperature. This contrasts directly with the behavior of cadmium. The quadrupole interaction is shown to increase by 40% as temperature is lowered to 4.2°K from room temperature.
Additional file 2 of MicroRNA-296-5p inhibits cell metastasis and invasion in nasopharyngeal carcinoma by reversing transforming growth factor-β-induced epithelial–mesenchymal transition
Creators: name: Chen, Meihui
name: Chen, Chen
name: Luo, Haiqing
name: Ren, Jing
name: Dai, Qiuqin
name: Hu, Wenjia
name: Zhou, Keyuan
name: Tang, Xudong
name: Li, Xiangyong
Publisher: name: figshare
Year: 2020
Subjects: subject: Biochemistry
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Physiology
subject: Immunology
subject: FOS: Clinical medicine
subject: Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Cancer

description: Additional file 2: Original Data.
Nonexistence for extremal Type II $\ZZ_{2k}$-Codes
Creators: name: Miezaki, Tsuyoshi
Publisher: name: arXiv
Year: 2009
Subjects: subject: Combinatorics (math.CO)
subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 94B05, 11F03

description: In this paper, we show that an extremal Type II $\ZZ_{2k}$-code of length $n$ dose not exist for all sufficiently large $n$ when $k=2,3,4,5,6$.
description: 8 pages. arXiv admin note: substantial text overlap with arXiv:0906.5023
Global existence analysis of energy-reaction-diffusion systems
Creators: name: Fischer, Julian
name: Hopf, Katharina
name: Kniely, Michael
name: Mielke, Alexander
Publisher: name: Weierstrass Institute
Year: 2021
Subjects: subject: Energy-reaction-diffusion systems
subject: cross diffusion
subject: global-in-time existence of weak/renormalised solutions
subject: entropy method
subject: Onsager system
subject: Soret/Dufour effect
subject: 35Q79
subject: 35K51
subject: 35K57
subject: 80A19

description: We establish global-in-time existence results for thermodynamically consistent reaction-(cross-)diffusion systems coupled to an equation describing heat transfer. Our main interest is to model species-dependent diffusivities, while at the same time ensuring thermodynamic consistency. A key difficulty of the non-isothermal case lies in the intrinsic presence of cross-diffusion type phenomena like the Soret and the Dufour effect: due to the temperature/energy dependence of the thermodynamic equilibria, a nonvanishing temperature gradient may drive a concentration flux even in a situation with constant concentrations; likewise, a nonvanishing concentration gradient may drive a heat flux even in a case of spatially constant temperature. We use time discretisation and regularisation techniques and derive a priori estimates based on a suitable entropy and the associated entropy production. Renormalised solutions are used in cases where non-integrable diffusion fluxes or reaction terms appear.
Analytical study on holographic superconductors in external magnetic field
Creators: name: Ge, Xian-Hui
name: Wang, Bin
name: Wu, Shao-Feng
name: Yang, Guo-Hong
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We investigate the holographic superconductors immersed in an external magnetic field by using the analytical approach. We obtain the spatially dependent condensate solutions in the presence of the magnetism and find analytically that the upper critical magnetic field satisfies the relation given in the Ginzburg-Landau theory. We observe analytically the reminiscent of the Meissner effect where the magnetic field expels the condensate. Extending to the D-dimensional Gauss-Bonnet AdS black holes, we examine the influence given by the Gauss-Bonnet coupling on the condensation. Different from the positive coupling, we find that the negative Gauss-Bonnet coupling enhances the condensation when the external magnetism is not strong enough.
description: revised version, to appear in JHEP
Differential Puiseux theorem in generalized series fields of finite rank
Creators: name: Matusinski, Mickael
Publisher: name: arXiv
Year: 2009
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics
subject: 34A25, 12J10, 12H05

description: We study differential equations $F(y,...,y^{(n)})=0$ where $F(Y_0,...,Y_n)$ is a formal series in $Y_0,...,Y_n$ with coefficients in some field of \emph{generalized power series} $\mathds{K}_r$ with finite rank $r\in\mathbb{N}^*$. Our purpose is to understand the connection between the set of exponents of the coefficients of the equation $\textrm{Supp} F$ and the set $\textrm{Supp} y_0$ of exponents of the elements $y_0\in\mathds{K}_r$ that are solutions.
description: 37 pages
Surface configurations of ionic crystals
Creators: name: Reid, Alex. James
Publisher: name: University of British Columbia
Year: 2011

description: We examine the surface configurations of sodium and cesium chloride using a simplified Born-Mayer-Huggins Interaction potential which neglects van der Waals forces and polarization. Displacements of the outer five layers normal to the {100} and {110} faces of sodium and cesium chloride respectively are considered. We adopt the procedure of determining the total force exerted by the planes of charge on an ion in a given plane as a function of their displacements and equate it to zero. Systems of simultaneous equations are thus arrived at and are solved by an iteration procedure. Two separate cases are considered: 1) nearest neighbor interaction only, and 2) second neighbor interaction. The effect of a free boundary on the variations in interionic spacings of the surface ions is found to decrease rapidly with increasing depth in the range considered. Both contraction and expansion of the surface layers is observed, and the configurations are found to depend highly on the form of the interaction potential.
Plastic deformations in crystal, polycrystal, and glass in binary mixtures under shear: Collective yielding
Creators: name: Shiba, Hayato
name: Onuki, Akira
Publisher: name: arXiv
Year: 2009
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Using molecular dynamics simulation, we examine the dynamics of crystal, polycrystal, and glass in a Lennard-Jones binary mixture composed of small and large particles in two dimensions. The crossovers occur among these states as the composition c is varied at fixed size ratio. Shear is applied to a system of 9000 particles in contact with moving boundary layers composed of 1800 particles. The particle configurations are visualized with a sixfold orientation angle alpha_j(t) and a disorder variable D_j(t) defined for particle j, where the latter represents the deviation from hexagonal order. Fundamental plastic elements are classified into dislocation gliding and grain boundary sliding. At any c, large-scale yielding events occur on the acoustic time scale. Moreover, they multiply occur in narrow fragile areas, forming shear bands. The dynamics of plastic flow is highly hierarchical with a wide range of time scales for slow shearing. We also clarify the relationship between the shear stress averaged in the bulk region and the wall stress applied at the boundaries.
description: 17 pages, 15 figures, to appear in Physical Review E