cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Fermionic Effective Operators and Higgs Production at a Linear Collider
Creators: name: Kile, Jennifer
name: Ramsey-Musolf, Michael J.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study the possible contributions of dimension six operators containing fermion fields to Higgs production at a 500 GeV or 1 TeV $e^+e^-$ linear collider. We show that -- depending on the production mechanism -- the effects of such operators can be kinematically enhanced relative to Standard Model (SM) contributions. We determine constraints on the operator coefficients implied by existing precision electroweak measurements and the scale of neutrino mass. We find that even in the presence of such constraints, substantial deviations from SM Higgs production cross-sections are possible. We compare the effects of fermionic operators with those associated with purely bosonic operators that have been previously discussed in the literature.
description: 25 pages, 9 figures, fixed typo in author names
SN 1987A : from the beginning at La Silla up to now with Spitzer & ALMA. 11722.308 days after its outburst
Creators: name: Bouchet, Patrice
name: Danziger, John
name: Gouiffes, Christian
name: Lucy, Leon
Publisher: name: Zenodo
Year: 2019

description: The explosion of SN 1987A in the LMC on February 23, 1987, generated a real outburst of the activities at La Silla. The scheduled and on-going observations were soon modified at all telescopes, for giving to this once-in-a-life-time event the importance it deserved. I will single out the exceptional temporal coverage of the observations conducted in the infrared, and their importance in understanding the physical phenomena that accompanied the evolution of the supernova. I will present the main results yield by the ESO group enlightening the building of the most complete and accurate bolometric light curve ever obtained from a supernova, the discovery of dust condensation in the ejecta, and the first estimates of chemical abundances. I would also especially draw attention to some of the advancements experienced during this adventure.
Observations are continuing and I will present a summary of the up-to-date results.  I will give an overview of the Guarantee Time Observations (GTO) that will be conducted with JWST.
Contributions of La Silla instruments to our understanding of stars
Creators: name: Maeder, Andre
Publisher: name: Zenodo
Year: 2019

description: Until the late sixties our knowledge about star evolution essentially rested on the HR
diagram of open and globular clusters. Already in the seventies, the early studies with the 40-cm
Objective Prism Astrograph at La Silla revealed some striking population differences between the
SMC, LMC and Milky Way, as a result of differences in metallicity Z and star formation history. A new
window on stellar physics and stellar populations was further opened by the ESO spectrographic
observations of the elemental stellar abundances. These observations, particularly of CNO and
some isotopic ratios, brought a lot on the physics of notably the red giants, AGB-stars, Horizontal
Branch stars, red supergiants, massive and WR stars. The roles of mass loss, instabilities, tidal
effects in binaries, rotation, internal mixing, often depending on Z, were better understood, which
had an impact on all model outputs: stellar parameters, ages, chemical yields, population synthesis,
relation between supernovae, GRBs and progenitors, sources of s-elements, of primary nitrogen,
etc… Several of these effects nowadays appear as essential for our understanding of the first stars
(cf. case of CEMP stars). Asteroseismology studies with HARPS are providing a new insight on the
stellar interiors, with a particular interest for planet hosting stars.
Spatio-temporal models of the functional architecture of the visual cortex
Creators: name: Cocci, Giacomo <1983>
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2014
Subjects: ING-INF/06 Bioingegneria elettronica e informatica

description: In this work I tried to explore many aspects of cognitive visual science, each one based on different academic fields, proposing mathematical models capable to reproduce both neuro-physiological and phenomenological results that were described in the recent literature. The structure of my thesis is mainly composed of three chapters, corresponding to the three main areas of research on which I focused my work. The results of each work put the basis for the following, and their ensemble form an homogeneous and large-scale survey on the spatio-temporal properties of the architecture of the visual cortex of mammals.
The DNA sequence of a rat RT1 Esub β DNA : assessment of homology within class 11β chains
Creators: name: Robertson, Katherine Anne
Publisher: name: University of British Columbia
Year: 2010

description: The Major Histocompatibility Complex (MHC) is a group of loci encoding cell surface glycoproteins involved in the regulation of the immune response. The loci within the complex display an unusually high degree of polymorphism in the two species studied to date; mice and humans. In order to determine if this polymorphism is found across other species, and if the encoded molecules show consistent similarities across the species, the MHC of a third mammal, the rat, was studied. The MHC of the rat, the RT1 Complex, codes for two types of Class II molecules, A and E, each composed of an α and β chain. A cDNA library made from Wistar rat spleen poly(A) RNA was screened with a DNA fragment from an RT1 Aβ gene to determine the coded message of a Class II β gene. A single cDNA clone was isolated and when sequenced was found to encode the complete RT1 Eg chain on the basis of comparison to the sequence of the Class II β chains of mice, as this chain had not been previously sequenced in the rat. The predicted protein sequence of the RT1 Eβ chain was found to contain greater amino acid sequence identity to the equivalent genes in mice and humans (82% and 73%) than to the RT1 Aβ gene (58%). Comparison of the predicted proteins of the A and Eβ genes of rats, mice and humans showed 105 out of 278 residues were identical across all six chains. In all six chains a number of regions containing stretches of identical residues were found which may be residues involved in structure and function. The divergence of the Aβ and Eβ chains across three species was examined by comparing the number of replacement and silent nucleotide changes between the protein coding sequences. This comparison showed that whereas the number of silent site substitutions increased with increasing species divergence, the number of replacement site substitutions did not, suggesting that these substitutions are under selective pressure.
Dynamic mean-field theory for dense spin systems at infinite temperature
Creators: name: Gräßer, Timo
name: Bleicker, Philip
name: Hering, Dag-Björn
name: Yarmohammadi, Mohsen
name: Uhrig, Götz S.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: A dynamic mean-field theory for spin ensembles (spinDMFT) at infinite temperatures on arbitrary lattices is established. The approach is introduced for an isotropic Heisenberg model with $S = \tfrac12$ and external field. For large coordination numbers, it is shown that the effect of the environment of each spin is captured by a classical time-dependent random mean-field which is normally distributed. Expectation values are calculated by averaging over these mean-fields, i.e., by a path integral over the normal distributions. A self-consistency condition is derived by linking the moments defining the normal distributions to spin autocorrelations. In this framework, we explicitly show how the rotating wave approximation becomes a valid description for increasing magnetic field. We also demonstrate that the approach can easily be extended. Exemplarily, we employ it to reach a quantitative understanding of a dense ensemble of spins with dipolar interaction which are distributed randomly on a plane including static Gaussian noise as well.
description: 33 pages, 37 figures
Heat conduction in low-dimensional quantum magnets
Creators: name: Hess, C.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Transport properties provide important information about the mobility, elastic and inelastic of scattering of excitations in solids. Heat transport is well understood for phonons and electrons, but little is known about heat transport by magnetic excitations. Very recently, large and unusual magnetic heat conductivities were discovered in low-dimensional quantum magnets. This article summarizes experimental results for the magnetic thermal conductivity $κ_\mathrm{mag}$ of several compounds which are good representations of different low-dimensional quantum spin models, i.e. arrangements of S=1/2 spins in the form of two-dimensional (2D) square lattices and one-dimensional (1D) structures such as chains and two-leg ladders. Remarkable properties of $κ_\mathrm{mag}$ have been discovered: It often dwarfs the usual phonon thermal conductivity and allows the identification and analysis of different scattering mechanisms of the relevant magnetic excitations.
Cheleion Vårdal & Forshage 2010, gen. n.
Creators: name: Vårdal, Hege
name: Forshage, Mattias
Publisher: name: Zenodo
Year: 2010
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Aphodiidae
Cheleion

description: Cheleion gen. n. urn:lsid:zoobank.org:act: CC1002E4-849C-437A-BAEF-678474600B59
description: Published as part of Vårdal, Hege & Forshage, Mattias, 2010, A new genus and species and a revised phylogeny of Stereomerini (Coleoptera, Scarabaeidae, Aphodiinae), with notes on assumedly termitophilic aphodiines, pp. 55-76 in ZooKeys 34 (34) on page 60, DOI: 10.3897/zookeys.34.264, http://zenodo.org/record/576605
Pioneering modern (high) resolution spectropolarimetry with the CASPEC Zeeman Analyser
Creators: name: Mathys, Gautier
Publisher: name: Zenodo
Year: 2019

description: Stellar astronomy entered a new era in the past decade with the realisation of the
ubiquitous presence of detectable magnetic fields in stars of most types. In particular, among the
main-sequence stars of spectral types O to early F, a sizeable population host large-scale
organised magnetic fields covering the entire stellar surface. The study of these magnetic fields
was made possible by the advent of modern high-resolution spectropolarimeters such as
HARPSpol, which combine high polarimetric accuracy with high spectral resolution and wide
spectral coverage. CASPEC with its Zeeman analyser is the common ancestor of these
instruments, for which it paved the way charting the unexplored territory of the diagnostic potential of
polarised line profiles for stellar magnetic field studies. I shall illustrate the new avenues that the
CASPEC Zeeman analyser opened and show that the results that it delivered and the techniques
that were developed to obtain them are still fully relevant today.
IQLIM O'ZGARISHINING SANOATGA TA'SIRI VA UNI KAMAYTIRISH CHORA-TADBIRLARI.
Creators: name: Tadjibayeva, Lolaxon
name: Valijonov, Ubaydullo
name: A'zamova, Asolatxon
Publisher: name: Zenodo
Year: 2025

description: Iqlim o‘zgarishi zamonaviy jamiyatning eng dolzarb muammolaridan biri bo‘lib, u har bir soha, atrof tabiiy muhit, shu jumladan, sanoatga katta ta’sir ko‘rsatmoqda. Atmosferada issiqxona gazlarining ko‘payishi va iqlimning keskin o‘zgarishi sanoatni qayta ko‘rib chiqishga majbur qilmoqda. Ushbu maqolada iqlim o‘zgarishining sanoatga bo‘lgan asosiy ta’sirlari va kelajakda ushbu ta’sirlarni kamaytirish yo‘llari haqida so‘z yuritiladi.
On the maximum bias functions of MM-estimates and constrained M-estimates of regression
Creators: name: Berrendero, José R.
name: Mendes, Beatriz V. M.
name: Tyler, David E.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Statistics Theory (math.ST)
subject: FOS: Mathematics
subject: 62F35 (Primary) 62J05 (Secondary)

description: We derive the maximum bias functions of the MM-estimates and the constrained M-estimates or CM-estimates of regression and compare them to the maximum bias functions of the S-estimates and the $τ$-estimates of regression. In these comparisons, the CM-estimates tend to exhibit the most favorable bias-robustness properties. Also, under the Gaussian model, it is shown how one can construct a CM-estimate which has a smaller maximum bias function than a given S-estimate, that is, the resulting CM-estimate dominates the S-estimate in terms of maxbias and, at the same time, is considerably more efficient.
description: Published at http://dx.doi.org/10.1214/009053606000000975 in the Annals of Statistics (http://www.imstat.org/aos/) by the Institute of Mathematical Statistics (http://www.imstat.org)
BOSHLАNG'ICH SINF O'QUVCHILАRIDА TАNQIDIY TАFАKKUR KO'NIKMALАRINI SHАKLLАNTIRISHNING  DIDАKTIK IMKONIYАTLАRI
Creators: name: Maxammatova, Ma'mura
Publisher: name: Zenodo
Year: 2023

description: Ushbu maqolada boshlаng‘ich sinflаrdа tаnqidiy fikrlаshni shаkllаntirish texnologiyаsini аmаliyotgа joriy etishning muhim vаzifаlаridаn biri mаzkur sohа vаkillаrini zаruriy bilimlаr bilаn qurollаntirishgа  qаrаtilmog‘i,shu bilаn birgа  mаktаb аmаliyotgа joriy etishni rivojlаntirishgа xizmаt qilаdi.О‘z nаvbаtidа bundаy tаyyorgаrlikkа egа pedаgoglаr o‘quvchilаrning bаrchа fаnlаrgа oid о‘quv-biluv kompetensiyаsini rivojlаntirish jаrаyonigа hаm fаol tа’sir etа olishi  haqidagi umumiy fikrlar keng ifodalangan.
Guiding superconducting vortices by magnetic domain walls
Creators: name: Vlasko-Vlasov, V.
name: Welp, U.
name: Karapetrov, G.
name: Novosad, V.
name: Belkin, A.
name: Rosenmann, D.
name: Iavarone, M.
name: Kwok, W. -K.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We demonstrate a unique prospect for inducing anisotropic vortex pinning and manipulating the directional motion of vortices using the stripe domain patterns of a uniaxial magnetic film in a the superconducting/ferromagnetic hybrid. Our observations can be described by a model, which considers interactions between magnetic charges of vortices and surface magnetic charges of domains resulting in the enhanced pinning of vortices on domain walls.
description: 12 pages, 6 figures
Dynamical system analysis of logotropic dark fluid with a power law in the rest-mass energy density
Creators: name: Mandal, Goutam
name: Biswas, Sujay Kr.
name: Saha, Subhajit
name: Mamon, Abdulla Al
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We consider a spatially flat FLRW universe. We assume that it is filled with dark energy in the form of logotropic dark fluid coupled with dark matter in the form of a perfect fluid having a barotropic equation of state. We employ dynamical system tools to obtain a complete qualitative idea of the evolution of such a universe. It is interesting to note that we ought to consider an approximation for the pressure of the logotropic dark fluid in the form of an infinite series so as to be able to construct the autonomous system required for a dynamical system study. This series form provides us with a power law in the rest-mass energy density of the logotropic dark fluid. We compute the critical points of the autonomous system and analyze these critical points by applying linear stability theory. Our analysis reveal a scenario of late-time accelerated universe dominated by the logotropic fluid which behaves as cosmological constant, preceded by an intermediate phase of the Universe dominated by logotropic fluid which behaves as dark matter in the form of perfect fluid. Moreover, it also crosses the phantom divide line.
description: 13 pages, 4 captioned figures. Version accepted for publication in Physics of the Dark Universe
Der Einsatz von EASy-Producer in der IIP-Ecosphere: Industrie 4.0, KI, Software-Produktlinien und Forschungsdaten
Creators: name: Eichelberger, Rer. Nat. Holger
Publisher: name: Zenodo
Year: 2021
Subjects: FDM
Forschungsdaten
Forschungsdatenmanagement
SSE
Software Systems Engineering
Universität Hildesheim
Stiftung Universität Hildesheim
EASy-Producer
Software-Produktlinien

description: Dies sind die Präsentationsfolien der Coffee Lecture zum Forschungsdatenmanagement für die Stiftung Universität Hildesheim (SUH, UB Hildesheim):

 "Der Einsatz von EASy-Producer in der IIP-Ecosphere: Industrie 4.0, KI, Software-Produktlinien und Forschungsdaten" des Referenten Dr. rer. nat. Holger Eichelberger (InstitutfürInformatik, Abteilung Software Systems Engineering, SSE, Stiftung Universität Hildesheim) vom 24.11.2021.
Hyperbolic Basis Functions for Time-Transient Analysis of Eddy Currents in Conductive and Magnetic Thin Sheets
Creators: name: Alves, Bruno de Sousa
name: Sabariego, Ruth V.
name: Laforest, Marc
name: Sirois, Frédéric
Publisher: name: arXiv
Year: 2021
Subjects: subject: Numerical Analysis (math.NA)
subject: Applied Physics (physics.app-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: This paper presents a new time-domain finite-element approach for modelling thin sheets with hyperbolic basis functions derived from the well-known steady-state solution of the linear flux diffusion equation. The combination of solutions at different operating frequencies permits the representation of the time-evolution of field quantities in the magnetic field formulation. This approach is here applied to solve a planar shielding problem in harmonic and time-dependent simulations for materials with either linear or nonlinear characteristics. Local and global quantities show good agreement with the reference solutions obtained by the standard finite element method on a complete and representative discretization of the region exposed to a time-varying magnetic field.
Curie point singularity in the temperature derivative of resistivity in (Ga,Mn)As
Creators: name: Novak, V.
name: Olejnik, K.
name: Wunderlich, J.
name: Cukr, M.
name: Vyborny, K.
name: Rushforth, A. W.
name: Edmonds, K. W.
name: Campion, R. P.
name: Gallagher, B. L.
name: Sinova, Jairo
name: Jungwirth, T.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We observe a singularity in the temperature derivative $dρ/dT$ of resistivity at the Curie point of high-quality (Ga,Mn)As ferromagnetic semiconductors with $T_c$'s ranging from approximately 80 to 185 K. The character of the anomaly is sharply distinct from the critical contribution to transport in conventional dense-moment magnetic semiconductors and is reminiscent of the $dρ/dT$ singularity in transition metal ferromagnets. Within the critical region accessible in our experiments, the temperature dependence on the ferromagnetic side can be explained by dominant scattering from uncorrelated spin fluctuations. The singular behavior of $dρ/dT$ on the paramagnetic side points to the important role of short-range correlated spin fluctuations.
description: 4 pages, 3 figures
Seven-color Vilnius photometry of the open cluster NGC 752
Creators: name: Bartasiute, S.
name: Deveikis, V.
name: Straizys, V.
name: Bogdanovicius, A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: New photoelectric seven-color observations in the Vilnius system are presented for 65 stars in the region of the open cluster NGC 752. Based on individual stars with accurate photometric classifications, we determine the apparent distance modulus (m-M)=8.38 and the mean reddening to the cluster E(Y-V)=0.027, or E(B-V)=0.034. The mean photometric metallicity for the main-sequence stars, [Fe/H]=-0.14, is found to be slightly lower than that derived for the red clump giants, [Fe/H]=-0.08. This difference suggests that red giants in later evolutionary phases may not have zero-age surface values of [Fe/H]. We made use of the least-squares minimization techniques to fit the Padova theoretical isochrones to the CMD, when the binary star population is taken into account. By varying the distance modulus, metallicity and age, the best match has been found between the seven magnitudes and colors of the observed stars and those of model binaries, which gives the distance modulus by 0.2 mag smaller than that derived from individual stars, i.e., (m-M)=8.18, a closely similar metallicity ([Fe/H]=-0.12), and age of 1.6 Gyr. With these results, the fraction of photometric binaries among the main-sequence stars is ~40%.
description: 28 pages, 7 figures, accepted for Baltic Astronomy
title: MAConDA. Le Mostre d´Arte Moderna nelle Gallerie private in Italia: i due decenni cruciali 1960 - 1980
titleType: Other
Creators: name: Fergonzi, Flavio
name: Zanchetti, Giorgio
name: Cinelli, Barbara
Publisher: name: Scuola Normale Superiore di Pisa
Year: 2021
Subjects: subject: FOS: Humanities
valueUri: http://www.oecd.org/science/inno/38235147.pdf
subject: FOS: Arts (arts, history of arts, performing arts, music)
valueUri: http://www.oecd.org/science/inno/38235147.pdf
subject: FOS: Other humanities
valueUri: http://www.oecd.org/science/inno/38235147.pdf

description: Il progetto MAConDA (Mostre di Arte Contemporanea Digital Archive) rende per la prima volta, liberamente fruibili online i materiali editoriali quali cataloghi, pieghevoli, inviti, altre edizioni di esposizioni di arte moderna tenute in alcune importanti gallerie private italiane attive nelle città di Torino, Milano e Roma durante il periodo 1960-1980. [...] L'obiettivo primario del progetto è stato quello di realizzare una banca dati di questi materiali.  I cataloghi, i bollettini di galleria, i pieghevoli, le locandine, gli inviti, una volta reperiti, sono stati digitalizzati, schedati, indicizzati e organizzati in una piattaforma digitale interrogabile come banca dati.
Relationship between the Mandelbrot Algorithm and the Platonic Solids
Creators: name: Vallières, André
name: Rochon, Dominic
Publisher: name: arXiv
Year: 2021
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 32A30, 30G35, 00A69, 51M20

description: This paper focuses on the dynamics of the eight tridimensional principal slices of the tricomplex Mandelbrot set: the Tetrabrot, the Arrowheadbrot, the Mousebrot, the Turtlebrot, the Hourglassbrot, the Metabrot, the Airbrot (octahedron) and the Firebrot (tetrahedron). In particular, we establish a geometrical classification of these 3D slices using the properties of some specific sets that correspond to projections of the bicomplex Mandelbrot set on various two-dimensional vector subspaces, and we prove that the Firebrot is a regular tetrahedron. Finally, we construct the so-called "Stella octangula" as a tricomplex dynamical system composed of the union of the Firebrot and its dual, and after defining the idempotent 3D slices of $\mathcal{M}_{3}$, we show that one of them corresponds to a third Platonic solid: the cube.
Isomonodromic deformation theory and the next-to-diagonal correlations of the anisotropic square lattice Ising model
Creators: name: Witte, N. S.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mathematical Physics (math-ph)
subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 82B20; 34M55; 33C45

description: In 1980 Jimbo and Miwa evaluated the diagonal two-point correlation function of the square lattice Ising model as a $τ$-function of the sixth Painlevé system by constructing an associated isomonodromic system within their theory of holonomic quantum fields. More recently an alternative isomonodromy theory was constructed based on bi-orthogonal polynomials on the unit circle with regular semi-classical weights, for which the diagonal Ising correlations arise as the leading coefficient of the polynomials specialised appropriately. Here we demonstrate that the next-to-diagonal correlations of the anisotropic Ising model are evaluated as one of the elements of this isomonodromic system or essentially as the Cauchy-Hilbert transform of one of the bi-orthogonal polynomials.
description: 11 pages, 1 figure
ExTrA Project
Creators: name: Forveille, Thierry
name: Bonfils, X.
name: Almenara, J. M.
name: Jocou, L.
name: Wünsche, A.
name: Kern, P.
name: Delboulbé, A.
name: Delfosse, X.
name: Feautrier, P.
name: Gluck, L.
name: Lafrasse, S.
name: Magnard, Y.
name: Maurel, D.
name: Moulin, T.
name: Murgas, F.
name: Rabou, P.
name: Rochat, S.
name: Roux, A.
name: Stadler, E.
Publisher: name: Zenodo
Year: 2019

description: No abstract
Cancellation of nonrenormalizable hypersurface divergences and the d-dimensional Casimir piston
Creators: name: Edery, Ariel
name: MacDonald, Ilana
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Using a multidimensional cut-off technique, we obtain expressions for the cut-off dependent part of the vacuum energy for parallelepiped geometries in any spatial dimension d. The cut-off part yields nonrenormalizable hypersurface divergences and we show explicitly that they cancel in the Casimir piston scenario in all dimensions. We obtain two different expressions for the d-dimensional Casimir force on the piston where one expression is more convenient to use when the plate separation a is large and the other when a is small (a useful $a \to 1/a$ duality). The Casimir force on the piston is found to be attractive (negative) for any dimension d. We apply the d-dimensional formulas (both expressions) to the two and three-dimensional Casimir piston with Neumann boundary conditions. The 3D Neumann results are in numerical agreement with those recently derived in arXiv:0705.0139 using an optical path technique providing an independent confirmation of our multidimensional approach. We limit our study to massless scalar fields.
description: 29 pages; 3 figures; references added; to appear in JHEP
O'ZBEKISTONDAGI SO'NGI YILLARDAGI IQTISODIY ISLOHOTLAR
Creators: name: Normoʻminov, Sardorbek
Publisher: name: Zenodo
Year: 2023

description: Ushbu maqolada bugungi kundagi yurtimizda bo’layotgan iqtisodiy rivojlantirishning eng xarakterli xususiyatlari o’ganildi va tahlil qilindi. Shuningdek, zamonaviy dunyoda innovatsiyalardan keng foydalanish orqali tadbirkorlikni jadal rivojlantirishga erishish yo’llario o’rganildi. Nafaqat O’zbekiston balki, qo’shni rivojlangan davlatlarning ham iqtisodiy tizimlari o’rganildi va tahlil qilindi.
Infrared Astronomy from La Silla (for skeptics)
Creators: name: Kaeufl, Ulli
Publisher: name: Zenodo
Year: 2019

description: ESO has been offering since ~1980 until today, almost uninterrupted, state of the art thermal IR facility class  instrumentation to its community.   I will give a short overview of instrumentation for mid infrared astronomy in use on LaSilla up to to 2006. Both techniques and scientific highlights will be presented.
Enterprise Architecture Model Transformation Engine
Creators: name: Heiland, Erik
name: Hillmann, Peter
name: Karcher, Andreas
Publisher: name: arXiv
Year: 2021
Subjects: subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: Artificial Intelligence (cs.AI)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Programming Languages (cs.PL)
subject: Software Engineering (cs.SE)
subject: Systems and Control (eess.SY)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: With increasing linkage within value chains, the IT systems of different companies are also being connected with each other. This enables the integration of services within the movement of Industry 4.0 in order to improve the quality and performance of the processes. Enterprise architecture models form the basis for this with a better buisness IT-alignment. However, the heterogeneity of the modeling frameworks and description languages makes a concatenation considerably difficult, especially differences in syntax, semantic and relations. Therefore, this paper presents a transformation engine to convert enterprise architecture models between several languages. We developed the first generic translation approach that is free of specific meta-modeling, which is flexible adaptable to arbitrary modeling languages. The transformation process is defined by various pattern matching techniques using a rule-based description language. It uses set theory and first-order logic for an intuitive description as a basis. The concept is practical evaluated using an example in the area of a large German IT-service provider. Anyhow, the approach is applicable between a wide range of enterprise architecture frameworks.
Improved Measurement of Inclusive Radiative B-meson decays
Creators: name: Belle Collaboration
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We report a fully inclusive measurement of the flavor changing neutral current decay $B\to X_sγ$ in the energy range $1.7 \GeV\le E^\mathrm{c.m.s}_γ\le 2.8 \GeV$, covering 97% of the total spectrum, where c.m.s is the center of mass system. Using $605\ifb$ of data, we obtain in the rest frame of the $B$-meson ${\mathcal B}(B\to X_sγ: E^B_γ>1.7 \mathrm{GeV})= (3.31 \pm 0.19 \pm 0.37 \pm 0.01)\times 10^{-4}$, where the errors are statistical, systematic and from the boost correction needed to transform from the rest frame of the $Υ(4S)$ (c.m.s) to that of the $B$-meson, respectively. We also measure the first and second moments of the photon energy spectrum as functions of various energy thresholds, which extend down to $1.7 \GeV$. The results are preliminary.
description: 10 pages, 11 figures
Aktuelle Entwicklungen bei der Unterstützung im Forschungsdatenmanagement für die Universität Hildesheim - Umsetzungsmöglichkeiten und Empfehlungen.
Creators: name: Strauch-Davey, Annette
Publisher: name: Zenodo
Year: 2021
Subjects: FDM
Forschungsdaten
Forschungsdatenmanagement
UB Hildesheim
Universität Hildesheim
Stiftung Universität Hildesheim
Digitaler Wandel

description: Die Präsentationsfolien werden nach der Veranstaltung "offen" bereitgestellt.

 Folien: https://www.uni-hildesheim.de/veranstaltungen/artikel/online-coffee-lectures-forschungsdatenmanagement-2/ ONLINE Coffee Lectures: Forschungsdatenmanagement Mittwoch, 01. Dezember 2021 um 12:30 Uhr Aktuelle Entwicklungen bei der Unterstützung im Forschungsdatenmanagement für die Universität Hildesheim.  Wo?  Die Veranstaltung wird mit dem Webkonferenzsystem auf Basis von BigBlueButton (BBB) bereitgestellt: https://bbb.uni-hildesheim.de/b/ann-08t-yff-mji (Eine Anmeldung zu den Coffee Lectures ist nicht erforderlich.) Wann? ab 12:30 Uhr Thema: Aktuelle Entwicklungen bei der Unterstützung im Forschungsdatenmanagement für die Universität Hildesheim - Umsetzungsmöglichkeiten und Empfehlungen Referent*in: Annette Strauch-Davey, M.A. Info: Die Nachhaltigkeit von Forschungsdaten, das Teilen von Forschungsdaten oder Publikationen von Datenbeständen gewinnen zunehmend an Bedeutung. Forscherinnen und Forscher diskutieren sowohl die Chancen als auch die Risiken von "Open Data", die Herausforderungen des Datenschutzes und der Forschungsethik. Weitere Infos: Kurzvorträge (ca. 40 Minuten) der Universitätsbibliothek zum Forschungsdatenmanagement mit Annette Strauch, M.A
Study of hadronic transitions between Y states and observation of Y(4S)-> eta Y(1S) decay
Creators: name: The BABAR Collaboration
name: Aubert, B.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We present a study of hadronic transitions between Y(mS) (m=4,3,2) and Y(nS) (n=2,1) resonances based on 347.5\invfb of data taken with the BABAR detector at the PEP-II storage rings. We report the first observation of Y(4S)-> eta Y(1S) decay with a branching fraction BR((Y(4S)->eta Y(1S))=(1.96+-0.06_{stat} +-0.09_{syst}) x 10^{-4} and measure the ratio of partial widths Gamma(Y(4S)->etaY(1S))/Gamma(Y(4S)->pi+pi-Y(1S))=2.41+- 0.40_{stat}+- 0.12_{syst}. We set 90% CL upper limits on the ratios Gamma(Y(2S)->etaY(1S))/Gamma(Y(2S)->pi+pi-Y(1S))<5.2 x10^{-3}$ and Gamma(Y(3S)->etaY(1S))/Gamma(Y(3S)->pi+pi-Y(1S))<1.9x10^{-2}. We also present new measurements of the ratios Gamma(Y(4S)->pi+pi-Y(2S))/Gamma(Y(4S)->pi+pi-Y(1S))=1.16+- 0.16_{stat}+- 0.14_{syst} and Gamma(Y(3S)->pi+pi-Y(2S))/Gamma(Y(3S)->pi+pi-Y(1S))=0.577+- 0.026_{stat}+- 0.060_{syst}.
description: 11 pages, 4 postscript figures, published in Physical Review D
The ESO 1m telescope
Creators: name: Moni Bidin, Christian
Publisher: name: Zenodo
Year: 2019

description: The Astronomy Institute of Universidad Católica del Norte (UCN) is running remote operations at the La Silla ESO 1m telescope, under a long-term ESO-UCN agreement. In this talk, I will present the current status of the facility, and the ongoing projects.
Reduced Density Matrix Sampling: Self-consistent Embedding and Multiscale Electronic Structure on Current Generation Quantum Computers
Creators: name: Tilly, Jules
name: Sriluckshmy, P. V.
name: Patel, Akashkumar
name: Fontana, Enrico
name: Rungger, Ivan
name: Grant, Edward
name: Anderson, Robert
name: Tennyson, Jonathan
name: Booth, George H.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: We investigate fully self-consistent multiscale quantum-classical algorithms on current generation superconducting quantum computers, in a unified approach to tackle the correlated electronic structure of large systems in both quantum chemistry and condensed matter physics. In both of these contexts, a strongly correlated quantum region of the extended system is isolated and self-consistently coupled to its environment via the sampling of reduced density matrices. We analyze the viability of current generation quantum devices to provide the required fidelity of these objects for a robust and efficient optimization of this subspace. We show that with a simple error mitigation strategy and optimization of compact tensor product bases to minimize the number of terms to sample, these self-consistent algorithms are indeed highly robust, even in the presence of significant noises on quantum hardware. Furthermore, we demonstrate the use of these density matrices for the sampling of non-energetic properties, including dipole moments and Fermi liquid parameters in condensed phase systems, achieving a reliable accuracy with sparse sampling. It appears that uncertainties derived from the iterative optimization of these subspaces is smaller than variances in the energy for a single subspace optimization with current quantum hardware. This boosts the prospect for routine self-consistency to improve the choice of correlated subspaces in hybrid quantum-classical approaches to electronic structure for large systems in this multiscale fashion.
Strong-field Breit-Wheeler pair production with bremsstrahlung gamma-rays in the perturbative-to-nonperturbative transition regime
Creators: name: Eckey, A.
name: Voitkiv, A. B.
name: Müller, C.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Photoproduction of electron-positron pairs by bremsstrahlung gamma-rays propagating through a high-intensity optical laser wave is studied. By calculating total pair production yields as well as energy and angular distributions of the produced particles for a range of laser intensities, we analyze the influence that the broad frequency spectrum of bremsstrahlung exerts on the properties of the process in the transition region between the perturbative and non-perturbative interaction regimes. In particular, we demonstrate a continuous shifting of the mainly contributing interval of bremsstrahlung frequencies during the course of the transition and indicate characteristic signatures of the laser-dressed particle mass.
description: 10 pages, 4 figures, to appear in Phys. Rev. A
Nuclear magnetic resonance force microscopy with a microwire rf source
Creators: name: Poggio, M.
name: Degen, C. L.
name: Rettner, C. T.
name: Mamin, H. J.
name: Rugar, D.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We use a 1.0-um-wide patterned Cu wire with an integrated nanomagnetic tip to measure the statistical nuclear polarization of 19F in CaF2 by magnetic resonance force microscopy (MRFM). With less than 350 uW of dissipated power, we achieve rf magnetic fields over 4 mT at 115 MHz for a sample positioned within 100 nm of the "microwire" rf source. A 200-nm diameter FeCo tip integrated onto the wire produces field gradients greater than 10^5 T/m at the same position. The large rf fields from the broadband microwire enable long rotating-frame spin lifetimes of up to 15 s at 4 K.
description: 4 pages, 4 figures
SWFC-ART: A Cost-effective Approach for Fixed-Size-Candidate-Set Adaptive Random Testing through Small World Graphs
Creators: name: Ashfaq, Muhammad
name: Huang, Rubing
name: Towey, Dave
name: Omari, Michael
name: Yashunin, Dmitry
name: Kudjo, Patrick Kwaku
name: Zhang, Tao
Publisher: name: arXiv
Year: 2021
Subjects: subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences
subject: D.2.5

description: Adaptive random testing (ART) improves the failure-detection effectiveness of random testing by leveraging properties of the clustering of failure-causing inputs of most faulty programs: ART uses a sampling mechanism that evenly spreads test cases within a software's input domain. The widely-used Fixed-Sized-Candidate-Set ART (FSCS-ART) sampling strategy faces a quadratic time cost, which worsens as the dimensionality of the software input domain increases. In this paper, we propose an approach based on small world graphs that can enhance the computational efficiency of FSCS-ART: SWFC-ART. To efficiently perform nearest neighbor queries for candidate test cases, SWFC-ART incrementally constructs a hierarchical navigable small world graph for previously executed, non-failure-causing test cases. Moreover, SWFC-ART has shown consistency in programs with high dimensional input domains. Our simulation and empirical studies show that SWFC-ART reduces the computational overhead of FSCS-ART from quadratic to log-linear order while maintaining the failure-detection effectiveness of FSCS-ART, and remaining consistent in high dimensional input domains. We recommend using SWFC-ART in practical software testing scenarios, where real-life programs often have high dimensional input domains and low failure rates.
description: 26 Pages
Microcanonical model for a gaz of evaporating black holes and strings, scattering amplitudes and mass spectrum
Creators: name: Cirilo-Lombardo, D. J.
name: Sanchez, N. G.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study the system formed by a gaz of black holes and strings within a microcanonical formulation. We derive the microcanonical content of the system: entropy, equation of state, number of components N, temperature T and specific heat. The pressure and the specific heat are negative reflecting the gravitational unstability and a non-homogeneous configuration. The asymptotic behaviour of the temperature for large masses emerges as the Hawking temperature of the system (classical or semiclassical phase) in which the classical black hole behaviour dominates, while for small masses (quantum black hole or string behavior) the temperature becomes the string temperature which emerges as the critical temperature of the system. At low masses, a phase transition takes place showing the passage from the classical (black hole) to quantum (string) behaviour. Within a microcanonical field theory formulation, the propagator describing the string-particle-black hole system is derived and from it the interacting four point scattering amplitude of the system is obtained. For high masses it behaves asymptotically as the degeneracy of states of the system (ie duality or crossing symmetry). The microcanonical propagator and partition function are derived from a (Nambu-Goto) formulation of the N-extended objects and the mass spectrum of the black-hole-string system is obtained: for small masses (quantum behaviour) these yield the usual pure string scattering amplitude and string-particle spectrum M_n\approx \sqrt{n}; for growing mass it pass for all the intermediate states up to the pure black hole behaviour. The different black hole behaviours according to the different mass ranges: classical, semiclassical and quantum or string behaviours are present in the model.
description: New material, 20 pages, no figures
Aktuelle Entwicklungen bei der Unterstützung im Forschungsdatenmanagement für die Universität Hildesheim - Umsetzungsmöglichkeiten und Empfehlungen.
Creators: name: Strauch-Davey, Annette
Publisher: name: Zenodo
Year: 2021
Subjects: FDM
Forschungsdaten
Forschungsdatenmanagement
UB Hildesheim
Universität Hildesheim
Stiftung Universität Hildesheim
Digitaler Wandel

description: Folien: https://www.uni-hildesheim.de/veranstaltungen/artikel/online-coffee-lectures-forschungsdatenmanagement-2/ ONLINE Coffee Lectures: Forschungsdatenmanagement Mittwoch, 01. Dezember 2021 um 12:30 Uhr Aktuelle Entwicklungen bei der Unterstützung im Forschungsdatenmanagement für die Universität Hildesheim.  Wo?  Die Veranstaltung wird mit dem Webkonferenzsystem auf Basis von BigBlueButton (BBB) bereitgestellt: https://bbb.uni-hildesheim.de/b/ann-08t-yff-mji (Eine Anmeldung zu den Coffee Lectures ist nicht erforderlich.) Wann? ab 12:30 Uhr Thema: Aktuelle Entwicklungen bei der Unterstützung im Forschungsdatenmanagement für die Universität Hildesheim - Umsetzungsmöglichkeiten und Empfehlungen Referent*in: Annette Strauch-Davey, M.A. Info: Die Nachhaltigkeit von Forschungsdaten, das Teilen von Forschungsdaten oder Publikationen von Datenbeständen gewinnen zunehmend an Bedeutung. Forscherinnen und Forscher diskutieren sowohl die Chancen als auch die Risiken von "Open Data", die Herausforderungen des Datenschutzes und der Forschungsethik. Weitere Infos: Kurzvorträge (ca. 40 Minuten) der Universitätsbibliothek zum Forschungsdatenmanagement mit Annette Strauch, M.A
Single exciton spectroscopy of single-Mn doped InAs quantum dots
Creators: name: van Bree, J.
name: Koenraad, P.
name: Fernandez-Rossier, J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The optical spectroscopy of a single InAs quantum dot doped with a single Mn atom is studied using a model Hamiltonian that includes the exchange interactions between the spins of the quantum dot electron-hole pair, the Mn atom and the acceptor hole. Our model permits to link the photoluminescence spectra to the Mn spin states after photon emission. We focus on the relation between the charge state of the Mn, $A^0$ or $A^-$, and the different spectra which result through either band-to-band or band-to-acceptor transitions. We consider both neutral and negatively charged dots. Our model is able to account for recent experimental results on single Mn doped InAs PL spectra and can be used to account for future experiments in GaAs quantum dots. Similarities and differences with the case of single Mn doped CdTe quantum dots are discussed.
description: 15 pages, 9 figures
Formation and Collapse of Quiescent Cloud Cores Induced by Dynamic Compressions
Creators: name: Gómez, Gilberto C.
name: Vázquez-Semadeni, Enrique
name: Shadmehri, Mohsen
name: Ballesteros-Paredes, Javier
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: (Abridged) We present numerical hydrodynamical simulations of the formation, evolution and gravitational collapse of isothermal molecular cloud cores. A compressive wave is set up in a constant sub-Jeans density distribution of radius r = 1 pc. As the wave travels through the simulation grid, a shock-bounded spherical shell is formed. The inner shock of this shell reaches and bounces off the center, leaving behind a central core with an initially almost uniform density distribution, surrounded by an envelope consisting of the material in the shock-bounded shell, with a power-law density profile that at late times approaches a logarithmic slope of -2 even in non-collapsing cases. The resulting density structure resembles a quiescent core of radius < 0.1 pc, with a Bonnor-Ebert-like (BE-like) profile, although it has significant dynamical differences: it is initially non-self-gravitating and confined by the ram pressure of the infalling material, and consequently, growing continuously in mass and size. With the appropriate parameters, the core mass eventually reaches an effective Jeans mass, at which time the core begins to collapse. Thus, there is necessarily a time delay between the appearance of the core and the onset of its collapse, but this is not due to the dissipation of its internal turbulence as it is often believed. These results suggest that pre-stellar cores may approximate Bonnor-Ebert structures which are however of variable mass and may or may not experience gravitational collapse, in qualitative agreement with the large observed frequency of cores with BE-like profiles.
description: Accepted for publication in ApJ. Associated mpeg files can be found in http://www.astrosmo.unam.mx/~g.gomez/publica.html
Spontaneous symmetry breakings in graphene subjected to in-plane magnetic field
Creators: name: Aleiner, I. L.
name: Kharzeev, D. E.
name: Tsvelik, A. M.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Application of the magnetic field parallel to the plane of the graphene sheet leads to the formation of electron- and hole-like Fermi surfaces. Such situation is shown to be unstable with respect to the formation of an excitonic condensate even for an arbitrary weak magnetic field and interaction strength. At temperatures lower than the mean-field temperature the order parameter amplitude is formed. The order parameter itself is a U(2) matrix allowing for the combined rotations in the spin and valley spaces. These rotations smoothly interpolate between site and bond centered spin density waves and spin flux states. The trigonal warping, short range interactions, and the three particle Umklapp processes freeze some degrees of freedom at temperatures much smaller than the mean-field transition temperature and make either Berezinskii-Kosterlitz-Thouless (driven either by vortices or half-vortices) or Ising type transitions possible. Strong logarithmic renormalization for the coupling constants of these terms by the Coulomb interaction are calculated within one-loop renormalization group. It is found that in the presence of the Coulomb interaction some short range interaction terms become much greater than one might expect from the naive dimensionality counting.
description: 28 pages, 20 figures; Supersedes arXiv:cond-mat/0611251