cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Oscillations of a Bose-Einstein condensate rotating in a harmonic plus quartic trap
Creators: name: Cozzini, M.
name: Fetter, A. L.
name: Jackson, B.
name: Stringari, S.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We study the normal modes of a two-dimensional rotating Bose-Einstein condensate confined in a quadratic plus quartic trap. Hydrodynamic theory and sum rules are used to derive analytical predictions for the collective frequencies in the limit of high angular velocities, $Ω$, where the vortex lattice produced by the rotation exhibits an annular structure. We predict a class of excitations with frequency $\sqrt{6} Ω$ in the rotating frame, irrespective of the mode multipolarity $m$, as well as a class of low energy modes with frequency proportional to $|m|/Ω$. The predictions are in good agreement with results of numerical simulations based on the 2D Gross-Pitaevskii equation. The same analysis is also carried out at even higher angular velocities, where the system enters the giant vortex regime.
description: 4 pages, 2 figures
Reduction of PDF uncertainty in the measurement of the weak mixing angle at the ATLAS experiment
Creators: name: Fu, Yao
name: Yang, Siqi
name: Liu, Minghui
name: Han, Liang
name: Hou, Tie-Jiun
name: Schmidt, Carl
name: Wang, Chen
name: Yuan, C. -P.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We investigate the parton distribution function (PDF) uncertainty in the measurement of the effective weak mixing angle $\sin^2θ_{\text{eff}}^{\ell}$ at the CERN Large Hadron Collider (LHC). The PDF-induced uncertainty is large in the proton-proton collisions at the LHC due to the dilution effect. The measurement of the Drell-Yan forward-backward asymmetry ($A_{FB}$) at the LHC can be used to reduce the PDF uncertainty in the $\sin^2θ_{\text{eff}}^{\ell}$ measurement. However, when including the full mass range of lepton pairs in the $A_{FB}$ data analysis, the correlation between the PDF updating procedure and the $\sin^2θ_{\text{eff}}^{\ell}$ extraction leads to a sizable bias in the obtained $\sin^2θ_{\text{eff}}^{\ell}$ value. From our studies, we find that the bias can be significantly reduced by removing Drell-Yan events with invariant mass around the $Z$ pole region, while most of the sensitivity in reducing the PDF uncertainty remains. Furthermore, the lepton charge asymmetry in the $W$ boson events as a function of the rapidity of the charged leptons, $A_\pm(η_\ell)$, is known to be another observable which can be used to reduce the PDF uncertainty in the $\sin^2θ_{\text{eff}}^{\ell}$ measurement. The constraint from $A_\pm(η_\ell)$ is complementary to that from the $A_{FB}$, thus no bias affects the $\sin^2θ_{\text{eff}}^{\ell}$ extraction. The studies are performed using the Error PDF Updating Method Package ({\sc ePump}), which is based on the Hessian updating methods. In this article, the CT14HERA2 PDF set is used as an example.
description: submitted to Chinese Physics C
Are magnetic monopoles hadrons?
Creators: name: Creutz, Michael
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: The charges of magnetic monopoles are constrained to a multiple of $2π$ times the inverse of the elementary unit electric charge. In the standard model, quarks have fractional charge, raising the question of whether the basic magnetic monople unit is a multiple of $2 π/e$ or three times that. A simple lattice construction shows how a magnetic monopole of the lower strength is possible if it interacts with gluonic fields as well. Such a monopole is thus a hadron. This is consistent with the construction of magnetic monopoles in grand unified theories.
description: Poster presented at Lattice2004(topology), Fermilab, June 21-26, 2004. 3 pages, 5 figures
Lucilia richardsi Collin 1926
Creators: name: Schlüsslmayr, Gerhard
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Calliphoridae
Lucilia
Lucilia richardsi

description: Lucilia richardsi COLLIN, 1926
OÖ, Kronstorf, Staninger Leiten, 9.8.17, 2 Ex; Bad Ischl, Katrin, 1542m, 29.8.17; Bgld, Loretto, Frauenwiesen, 19.7.17, 5 Ex; Breitenbrunn, Thenau, 6.6.17; NÖ, Hainburg, Spitzerberg, 11.7.01.
Neu für Burgenland, Ober- und Niederösterreich.
description: Published as part of Schlüsslmayr, Gerhard, 2018, Erstnachweise von Fliegen (Diptera) für Österreich und einige Bundesländer, pp. 765-800 in Linzer biologische Beiträge 50 (1) on page 786, DOI: 10.5281/zenodo.4004374
A discontinuity in the electromagnetic field of a uniformly accelerated charge
Creators: name: Singal, Ashok K.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Classical Physics (physics.class-ph)
subject: FOS: Physical sciences

description: The electric field of a uniformly accelerated charge shows a plane of discontinuity, where the field extending only on one side of the plane, terminates abruptly on the plane with a finite value. This indicates a non-zero divergence of the electric field in a source-free region, implying a violation of Gauss law. In order to make the field compliant with Maxwell's equations everywhere, an additional field component, proportional to a $δ$-function at the plane of discontinuity, is required. Such a "$δ$-field" might be the electromagnetic field of the charge, moving with a uniform velocity approaching $c$, the speed of light, prior to the imposition of acceleration at infinity. However, some attempts to derive this $δ$-field for such a case, have not been entirely successful. Some of the claims of the derivation involve elaborate calculations with some not-so-obvious mathematical approximations. Since the result to be derived is already known from the constraint of its compliance with Maxwell's equations, and the derivation involves the familiar text-book expressions for the field of a uniformly moving charge, one would expect an easy, simple approach, to lead to the correct result. Here, starting from the electromagnetic field of a uniformly accelerated charge in the instantaneous rest frame, in terms of the position and motion of the charge at the retarded time, we derive this $δ$-field, consistent with Maxwell's equations, in a fairly simple manner. This is followed by a calculation of the energy in the $δ$-field, in an analytical manner without making any approximation, where we show that this energy is exactly the one that would be lost by the charge because of the radiation reaction on the charge, proportional to its rate of change of acceleration, that was imposed on it at a distant past.
description: 10 pages, 5 figures
Alberti--Uhlmann problem on Hardy--Littlewood--Pólya majorization
Creators: name: Huang, Jinghao
name: Sukochev, Fedor
Publisher: name: arXiv
Year: 2020
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics

description: We fully describe the doubly stochastic orbit of a self-adjoint element in the noncommutative $L_1$-space affiliated with a semifinite von Neumann algebra, which answers a problem posed by Alberti and Uhlmann in the 1980s, extending several results in the literature. It follows further from our methods that, for any $σ$-finite von Neumann algebra $\mathcal{M}$ equipped a semifinite infinite faithful normal trace $τ$, there exists a self-adjoint operator $y\in L_1(\mathcal{M},τ)$ such that the doubly stochastic orbit of $y$ does not coincide with the orbit of $y$ in the sense of Hardy--Littlewood--Pólya, which confirms a conjecture by Hiai. However, we show that Hiai's conjecture fails for non-$σ$-finite von Neumann algebras. The main result of the present paper also answers the (noncommutative) infinite counterparts of problems due to Luxemburg and Ryff in the 1960s.
A KOMPOLTI ŐSZI ÁRPA NEMESÍTÉS HELYE EURÓPÁBAN
Creators: name: Muranyi, Istvan
name: Simon, Anna
name: Muranyi, Istvan
name: Simon, Anna
Publisher: name: Unknown
Year: 2005
Subjects: subject: Crop Production/Industries
subject: Production Economics
subject: növénynemesítés
subject: új kihívások és irányok
subject: hybridization
subject: new challenges and directions

description: A növénynemesítés fokozatosan romló működési körülményei, a hatékony marketing és a vetőmagkereskedelem hiányosságai, a külföldi fajták nyomása következtében több növényfajban a hazai nemesítés jelentősége csökkent az utóbbi 20 évben, sőt néhány növényfaj nemesítése Magyarországon meg is szűnt. A Kompolton folyó őszi árpa nemesítés eredményesen állt helyt a külföldi fajtaelőállítók nyomásának. Fajtáink kiváló termőképessége mellett, kiemelkedő télállósággal, igen jó szárszilárdsággal, megbízható állóképességgel, összességé-ben kiváló alkalmazkodóképességgel rendelkeznek. Összesen 12 takarmányárpa és 2 őszi sörárpa fajtánkkal minden termesztési választékkal rendelkezünk. 2004-ben az OMMI kísérletekben a korai és a középérésű csoportban is két-két fajtánk került az első helyre, három év átlagában öt kompolti fajta van az élen. A termelők körében egyre kedveltebbek a kompolti őszi árpa fajták. XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX The gradually deteriorating operating environment for plant cultivation, coupled with a lack of effective marketing and seed-corn trade and the pressure from foreign varieties, has resulted in a reduced significance for national hybridisation in the past 20 years. In fact, the hybridisation of a number of varieties has ceased altogether in Hungary. The hybridisation of winter barley taking place in Kompolt has successfully held its own under pressure from cultivators of foreign varieties. Besides the eminent fertility of this variety, it possesses an outstanding hardiness in winter, good stalk strength, reliable resistance to storage and an all-round excellent adaptability. Our 12 varieties of feed barley and two of brewing barley represent a complete range of cultivation choices. Two of our varieties head up the list of both the early and medium ripening categories in the 2004 national (OMMI) trials; five Kompolt varieties lead the field over an average period of three years. Kompolt winter barley varieties are increasingly popular among producers.
Calibration of the first detector flight models for the HERMES constellation and the SpIRIT mission
Creators: name: Campana, R.
name: Baroni, G.
name: Della Casa, G.
name: Dilillo, G.
name: Marchesini, E. J.
name: Ceraudo, F.
name: Guzman, A.
name: Hedderman, P.
name: Evangelista, Y.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: HERMES (High Energy Rapid Modular Ensemble of Satellites) is a space-borne mission based on a constellation of six 3U CubeSats flying in a low-Earth orbit, hosting new miniaturized instruments based on a hybrid Silicon Drift Detector/GAGG:Ce scintillator photodetector system sensitive to X-rays and gamma-rays. Moreover, the HERMES constellation will operate in conjunction with the Australian-Italian Space Industry Responsive Intelligent Thermal (SpIRIT) 6U CubeSat, that will carry in a Sun-synchronous orbit (SSO) an actively cooled HERMES detector system payload. In this paper we provide an overview of the ground calibrations of the first HERMES and SpIRIT flight detectors, outlining the calibration plan, detector performance and characterization.
description: 9 pages, 7 figures. Proceedings of SPIE Astronomical Telescopes and Instrumentation 2022
ARTICULO 3.PDF
Creators: name: Sánchez, César Adán Almendárez
Publisher: name: figshare
Year: 2020
Subjects: subject: 110904 Neurology and Neuromuscular Diseases
subject: FOS: Clinical medicine
subject: Neuroscience

description: Hemangioblastoma is a rare tumor of the Central Nervous System, classically vascular. This represents only 1-2.5% of all intracranial tumors and approximately 10% of all posterior fossa tumors. We present a case of a patient with this condition, with clinical data of gastrointestinal pathology, which highlights the importance of a comprehensive neurological examination.
Three dimensional vacuum domains in four dimensional SU(2) gluodynamics
Creators: name: Kovalenko, A. V.
name: Polikarpov, M. I.
name: Syritsyn, S. N.
name: Zakharov, V. I.
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: Performing lattice simulations of the four dimensional SU(2)gluodynamics we find evidence for existence of three-dimensional domains whose total volume scales in physical units. Technically, the domains are defined in terms of the minimal density of negative links in Z(2) projection of gauge fields. The volume can be viewed also as the minimal volume bound by the center vortices. We argue that the three-dimensional domains are closely related to confinement.
description: 7 pages, 1 figure
Terminating basic hypergeometric representations and transformations for the Askey-Wilson polynomials
Creators: name: Cohl, Howard S.
name: Costas-Santos, Roberto S.
name: Ge, Linus
Publisher: name: arXiv
Year: 2020
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics

description: In this survey paper, we exhaustively explore the terminating basic hypergeometric representations of the Askey-Wilson polynomials and the corresponding terminating basic hypergeometric transformations that these polynomials satisfy. From the terminating basic hypergeometric representations of these polynomials, and due to symmetry in their free parameters, we are able to exhaustively explore the terminating basic hypergeometric transformation formulae which these polynomials satisfy.
description: 14 pages
MUSTÁR FAJTAKISÉRLET EREDMÉNYEI
Creators: name: Szabo, Lajos
name: Fodor, Laszlo
name: Szabo, Lajos
name: Fodor, Laszlo
Publisher: name: Unknown
Year: 2005
Subjects: subject: Crop Production/Industries
subject: új növény
subject: termesztéstechnológia
subject: new potentila crop
subject: new technology

description: A 2003-as év időjárása nem kedvezett a mustár növekedésének, fejlődésének. A hosszú hideg téli időjárás után szinte átmenet nélkül beköszöntő forróság és aszály miatt csak szerény terméseket tudtunk betakarítani (0,3-0,4 t/ha). A fajták összehasonlításában mindhárom vetésidő esetében a Zlata fajta bi-zonyult a legjobbnak. A Budakalászi sárga standard fajta a kísérleti átlagnak megfelelő 0,35 t/ha körüli termésátlagot produkált. A vetésidő kísérletben a március végei (03.28.) vetés volt a legjobb. A túl korai vetés miatt a kelés elhúzódik és az állomány egyenetlenné válik. Megkésett vetés esetén a virágzás és termésképzés az aszályos időszakra tolódik és csökken a termésbiztonság. XXXXXXXXXXXXXXXXXXXXXXXXXXX The 2003 weather conditions did not favour the growth and development of mustard. As a result of the long, cold winter, followed almost without transition by torrid heat and drought, we were able to harvest only very modest crops (0.3-0.4 tonnes/ha.). In a comparison of types, the Zlata variety proved to be the best in all three sowing periods. The standard, yellow Budakalász variety produced an average yield of 0.35 tonnes/ha, in keeping with the average for the experiment. As for sowing periods, the late March (28.03) sowing was the most successful. Early sowing results in long-drawn-out sprouting and produces an uneven stand. In the case of late sowing, flowering and crop growth is shifted into the drought period, reducing the reliability of the harvest.
Explosive synchronization in temporal networks: A comparative study
Creators: name: Singla, Tanu
name: Rivera, M.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: FOS: Physical sciences

description: We present a comparative study on Explosive Synchronization (ES) in temporal networks consisting of phase oscillators. The temporal nature of the networks is modeled with two configurations: (1) oscillators are allowed to move in a closed two dimensional box such that they couple with their neighbors, (2) oscillators are static and they randomly switch their coupling partners. Configuration (1) is further studied under two possible scenarios: in the first case oscillators couple to fixed numbers of neighbors while in other they couple to all oscillators lying in their circle of vision. Under these circumstances, we monitor the degrees of temporal networks, velocities, and radius of circle of vision of the oscillators, and the probability of forming connections in order to study and compare the critical values of the coupling required to induce ES in the population of phase oscillators.
Radiative vector meson decay
Creators: name: Palomar, J. E.
name: Roca, L.
name: Oset, E.
name: Vacas, M. J. Vicente
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study the radiative $ρ$, $ω$ and $ϕ$ decay into $π^0 π^0 γ$ and $π^0 ηγ$ taking into account mechanisms in which there are two sequential vector-vector-pseudoscalar or axial-vector--vector--pseudoscalar steps followed by the coupling of a vector meson to the photon, considering the final state interaction of the two mesons. Other mechanisms in which two kaons are produced through the same sequential mechanisms or from vector meson decay into two kaons which undergo final state interaction leading to the final pair of pions or $π^0 η$, are also considered. The results of the parameter free theory, together with the theoretical uncertainties, are compared with the latest experimental results at Frascati and Novosibirsk.
description: Prepared for the 10th International Symposium on Meson-Nucleon Physics and the Structure of the Nucleon
Lucilia sericata
Creators: name: Schlüsslmayr, Gerhard
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Calliphoridae
Lucilia
Lucilia sericata

description: Lucilia sericata (MEIGEN, 1826)
Bgld, Illmitz, Hölle, 11.6.17, 2 Ex und 18.7.17, 2 Ex; St. Margarethen, NSG Nord, 21.6.17; Bgld, Donnerskirchen, Kirchberg, 25.4.17 und 22.6.17; Neusiedl, Kalvarienberg, 30.5.17.
Neu für Burgenland.
description: Published as part of Schlüsslmayr, Gerhard, 2018, Erstnachweise von Fliegen (Diptera) für Österreich und einige Bundesländer, pp. 765-800 in Linzer biologische Beiträge 50 (1) on page 786, DOI: 10.5281/zenodo.4004374
Two-loop QCD gauge coupling at high temperatures
Creators: name: Laine, M.
name: Schroder, Y.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We determine the 2-loop effective gauge coupling of QCD at high temperatures, defined as a matching coefficient appearing in the dimensionally reduced effective field theory. The result allows to improve on one of the classic non-perturbative probes for the convergence of the weak-coupling expansion at high temperatures, the comparison of full and effective theory determinations of an observable called the spatial string tension. We find surprisingly good agreement almost down to the critical temperature of the deconfinement phase transition. We also determine one new contribution of order O(g^6T^4) to the pressure of hot QCD.
description: 17 pages
Effects of dynamical noises on Majorana bound states
Creators: name: Radgohar, Roya
name: Kargarian, Mehdi
Publisher: name: arXiv
Year: 2020
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The nonlocal nature of unpaired Majorana bound states (MBSs) in topological superconductors can be exploited to create topologically protected qubits and perform gate operations fault-tolerantly via braidings. However, the time-dependent noises induced by coupling to an environment which is inevitable in any realistic system could spoil the topological protection. In this work, we study the effects of various dynamical noises such as Lorentzian, thermal, and quantum point contact on the MBSs in the recently proposed one-dimensional topological superconductors. We begin by investigating the Kitaev p-wave superconductors and examine the effects of long-range hopping and pairing on the transition rate of MBSs. We found that, especially, the long-range pairings significantly reduce the transition rate of bound states. Then, we consider the recently discovered topological superconducting nanowires and magnetic chains. Our findings are consequential for the recent attempts to manipulate MBSs. In particular, for the latter two experimentally realized systems we argue how low magnetic/Zeeman fields and strong spin-orbit coupling make the MBSs more robust to noises.
description: 10 pages, 6 figures
Forest stand characteristics as indicators of hydrogeomorphic activity on fans
Creators: name: Wilford, David John
Publisher: name: University of British Columbia
Year: 2009

description: Forested fans are common landforms in west central British Columbia. They can be subject to hydrogeomorphic processes ranging from debris flows to floods carrying bedload and woody debris. These processes represent hazards for forest management activities such as road construction and harvesting. Conversely, forest management activities can exacerbate the effect of natural hydrogeomorphic processes, increasing the level of disturbance on fan surfaces and in stream channels. This thesis presents the scientific basis for a hazard classification of fans for forest management. The classification is based on forest stand characteristics, airphoto and site features, and basic watershed attributes. Forest stands are used to determine the power of hydrogeomorphic events (floods, debris floods, and debris flows). High-power events clear swaths through a forest stand, which lead to the establishment of distinctive cohorts. Low-power events lead to the deposition of sediments under a forest canopy, which generally results in growth responses rather than mortality or removal of the forest stand. In cases where there is mortality, tree stems remain in situ rather than being cleared from the affected area. Site features of sediment deposits are used to determine the hydrogeomorphic process. Watershed attributes were determined for identifying hydrogeomorphic processes, power and disturbance extent level. The attributes are basic morphometric parameters such as watershed area and relief, and most can be measured directly from topographic maps without the use of geographic information systems (GIS). Dendroecological techniques were used to determine the number of events occurring on study fans. Regression equations were developed to predict the number of events in the past 50 years. The independent variables were watershed attributes that can be determined by a combination of topographic map measurements and GIS. An examination of 55 fans with forestry activities provides a comprehensive hazard perspective on key fan and watershed attributes, and on the influence of road construction and harvesting prescriptions in zones of fans that are subjective to active hydrogeomorphic processes. The hazard classification and the forestry activity review provide the first comprehensive basis for sustainable forest management on fans in British Columbia.
Bond-order correlation energies for small Si-containing molecules compared with ab initio results from low-order Moller-Plesset perturbation theory
Creators: name: Grassi, A.
name: Lombardo, G. M.
name: Forte, G.
name: Angilella, G. G. N.
name: Pucci, R.
name: March, N. H.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Atomic and Molecular Clusters (physics.atm-clus)
subject: FOS: Physical sciences

description: The present study of small molecules containing silicon has been motivated by (a) the considerable interest being shown currently in the kinetics and reactivity of such molecules, and (b) the biotechnological potential of silicon-derivate surfaces as substrates in the adsorption of, for instance, amino acids and proteins. Therefore, we have studied by (i) a semi-empirical approach and (ii) an ab initio procedure employing low-order Moller-Plesset perturbation theory, the molecular correlation energies of some neutral closed and open shell silicon-containing molecules in the series SiXnYm. Procedure (i) is shown to have particular merit for the correlation of the ionic members studied in the above series, while the ab initio procedures employed come into their own for neutral species.
description: Mol. Phys., to be published
Rheology of gelling polymers in the Zimm model
Creators: name: Löwe, Henning
name: Müller, Peter
name: Zippelius, Annette
Publisher: name: arXiv
Year: 2004
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: In order to study rheological properties of gelling systems in dilute solution, we investigate the viscosity and the normal stresses in the Zimm model for randomly crosslinked monomers. The distribution of cluster topologies and sizes is assumed to be given either by Erd\H os-Rényi random graphs or three-dimensional bond percolation. Within this model the critical behaviour of the viscosity and of the first normal stress coefficient is determined by the power-law scaling of their averages over clusters of a given size $n$ with $n$. We investigate these Mark--Houwink like scaling relations numerically and conclude that the scaling exponents are independent of the hydrodynamic interaction strength. The numerically determined exponents agree well with experimental data for branched polymers. However, we show that this traditional model of polymer physics is not able to yield a critical divergence at the gel point of the viscosity for a polydisperse dilute solution of gelation clusters. A generally accepted scaling relation for the Zimm exponent of the viscosity is thereby disproved.
description: 9 pages, 2 figures
Tachyon Monopole
Creators: name: Li, Xin-zhou
name: Liu, Dao-jun
Publisher: name: arXiv
Year: 2005
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The property and gravitational field of global monopole of tachyon are investigated in a four dimensional static space-time. We give an exact solution of the tachyon field in the flat space-time background. Using the linearized approximation of gravity, we get the approximate solution of the metric. We also solve analytically the coupled Einstein and tachyon field equations which is beyond the linearized approximation to determine the gravitational properties of the monopole solution. We find that the metric of tachyon monopole represents an asymptotically AdS space-time with a small effective mass at the origin. We show that this relatively tiny mass is actually negative, as it is in the case of ordinary scalar field.
description: 7 pages, no figure, has been published in IJMPA
An Extensive Study on Cross-Dataset Bias and Evaluation Metrics Interpretation for Machine Learning applied to Gastrointestinal Tract Abnormality Classification
Creators: name: Thambawita, Vajira
name: Jha, Debesh
name: Hammer, Hugo Lewi
name: Johansen, Håvard D.
name: Johansen, Dag
name: Halvorsen, Pål
name: Riegler, Michael A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Machine Learning (cs.LG)
subject: Multimedia (cs.MM)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: Precise and efficient automated identification of Gastrointestinal (GI) tract diseases can help doctors treat more patients and improve the rate of disease detection and identification. Currently, automatic analysis of diseases in the GI tract is a hot topic in both computer science and medical-related journals. Nevertheless, the evaluation of such an automatic analysis is often incomplete or simply wrong. Algorithms are often only tested on small and biased datasets, and cross-dataset evaluations are rarely performed. A clear understanding of evaluation metrics and machine learning models with cross datasets is crucial to bring research in the field to a new quality level. Towards this goal, we present comprehensive evaluations of five distinct machine learning models using Global Features and Deep Neural Networks that can classify 16 different key types of GI tract conditions, including pathological findings, anatomical landmarks, polyp removal conditions, and normal findings from images captured by common GI tract examination instruments. In our evaluation, we introduce performance hexagons using six performance metrics such as recall, precision, specificity, accuracy, F1-score, and Matthews Correlation Coefficient to demonstrate how to determine the real capabilities of models rather than evaluating them shallowly. Furthermore, we perform cross-dataset evaluations using different datasets for training and testing. With these cross-dataset evaluations, we demonstrate the challenge of actually building a generalizable model that could be used across different hospitals. Our experiments clearly show that more sophisticated performance metrics and evaluation methods need to be applied to get reliable models rather than depending on evaluations of the splits of the same dataset, i.e., the performance metrics should always be interpreted together rather than relying on a single metric.
description: 30 pages, 12 figures, 8 tables, Accepted for ACM Transactions on Computing for Healthcare
Lucilia silvarum
Creators: name: Schlüsslmayr, Gerhard
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Calliphoridae
Lucilia
Lucilia silvarum

description: Lucilia silvarum (MEIGEN, 1826)
Bgld, Illmitz, Hölle, 11.6.17.
Neu für Burgenland.
description: Published as part of Schlüsslmayr, Gerhard, 2018, Erstnachweise von Fliegen (Diptera) für Österreich und einige Bundesländer, pp. 765-800 in Linzer biologische Beiträge 50 (1) on page 786, DOI: 10.5281/zenodo.4004374
Holographic Model for Mesons at Finite Temperature
Creators: name: Ghoroku, Kazuo
name: Yahiro, Masanobu
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: A holographic model of QCD at finite temperature is proposed and thermal properties for light mesons are examined in terms of this model. We find interesting temperature dependences of masses and decay constants for several mesons, and Nambu-Goldstone theorem for the chiral symmetry breaking and generalized Gell-Mann-Oakes-Renner relation are assured at finite temperature. Furthermore, we can see in the chiral limit that the speed of the pion in the thermal medium decreases to zero when the temperature approaches to the critical point of quark confinement and deconfinement transition, where the chiral symmetry is restored.
description: 9 pages, 3 figures
Mapping distinct phase transitions to a neural network
Creators: name: Bachtis, Dimitrios
name: Aarts, Gert
name: Lucini, Biagio
Publisher: name: arXiv
Year: 2020
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We demonstrate, by means of a convolutional neural network, that the features learned in the two-dimensional Ising model are sufficiently universal to predict the structure of symmetry-breaking phase transitions in considered systems irrespective of the universality class, order, and the presence of discrete or continuous degrees of freedom. No prior knowledge about the existence of a phase transition is required in the target system and its entire parameter space can be scanned with multiple histogram reweighting to discover one. We establish our approach in q-state Potts models and perform a calculation for the critical coupling and the critical exponents of the $ϕ^{4}$ scalar field theory using quantities derived from the neural network implementation. We view the machine learning algorithm as a mapping that associates each configuration across different systems to its corresponding phase and elaborate on implications for the discovery of unknown phase transitions.
Expanding bubbles in Orion A: [CII] observations of M42, M43, and NGC 1977
Creators: name: Pabst, C. H. M.
name: Goicoechea, J. R.
name: Teyssier, D.
name: Berné, O.
name: Higgins, R. D.
name: Chambers, E. T.
name: Kabanovic, S.
name: Güsten, R.
name: Stutzki, J.
name: Tielens, A. G. G. M.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The Orion Molecular Cloud is the nearest massive-star forming region. Massive stars have profound effects on their environment due to their strong radiation fields and stellar winds. Velocity-resolved observations of the [CII] $158\,μ\mathrm{m}$ fine-structure line allow us to study the kinematics of UV-illuminated gas. Here, we present a square-degree-sized map of [CII] emission from the Orion Nebula complex obtained by the upGREAT instrument onboard SOFIA, covering the entire Orion Nebula (M42) plus M43 and the nebulae NGC 1973, 1975, and 1977. We compare the stellar characteristics of these three regions with the kinematics of the expanding bubbles surrounding them. The bubble blown by the O7V star $θ^1$ Ori C in the Orion Nebula expands rapidly, at $13\,\mathrm{km\,s^{-1}}$. Simple analytical models reproduce the characteristics of the hot interior gas and the neutral shell of this wind-blown bubble and give us an estimate of the expansion time of $0.2\,\mathrm{Myr}$. M43 with the B0.5V star NU Ori also exhibits an expanding bubble structure, with an expansion velocity of $6\,\mathrm{km\,s^{-1}}$. Comparison with analytical models for the pressure-driven expansion of H\,{\sc ii} regions gives an age estimate of $0.02\,\mathrm{Myr}$. The bubble surrounding NGC 1973, 1975, and 1977 with the central B1V star 42 Orionis expands at $1.5\,\mathrm{km\,s^{-1}}$, likely due to the over-pressurized ionized gas as in the case of M43. We derive an age of $0.4\,\mathrm{Myr}$ for this structure. We conclude that the bubble of the Orion Nebula is driven by the mechanical energy input by the strong stellar wind from $θ^1$ Ori C, while the bubbles associated with M43 and NGC 1977 are caused by the thermal expansion of the gas ionized by their central later-type massive stars.
Spin dynamics of a magnetic Weyl semimetal Sr$_{1-x}$Mn$_{1-y}$Sb$_2$
Creators: name: Cai, Zhengwei
name: Bao, Song
name: Wang, Wei
name: Ma, Zhen
name: Dong, Zhao-Yang
name: Shangguan, Yanyan
name: Wang, Jinghui
name: Ran, Kejing
name: Li, Shichao
name: Kamazawa, Kazuya
name: Nakamura, Mitsutaka
name: Adroja, Devashibhai
name: Yu, Shun-Li
name: Li, Jian-Xin
name: Wen, Jinsheng
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Dirac matters provide a platform for exploring the interplay of their carriers with other quantum phenomena. Sr$_{1-x}$Mn$_{1-y}$Sb$_2$ has been proposed to be a magnetic Weyl semimetal and provides an excellent platform to study the coupling between Weyl fermions and magnons. Here, we report comprehensive inelastic neutron scattering (INS) measurements on single crystals of Sr$_{1-x}$Mn$_{1-y}$Sb$_2$, which have been well characterized by magnetization and magnetotransport measurements, both of which demonstrate that the material is a topologically nontrivial semimetal. The INS spectra clearly show a spin gap of $\sim6$ meV. The dispersion in the magnetic Mn layer extends up to about 76 meV, while that between the layers has a narrow band width of 6 meV. We find that the linear spin-wave theory using a Heisenberg spin Hamiltonian can reproduce the experimental spectra with the following parameters: a nearest-neighbor ($SJ_1\sim28.0$ meV) and next-nearest-neighbor in-plane exchange interaction ($SJ_2\sim9.3$ meV) , interlayer exchange coupling ($SJ_c\sim-0.1$ meV), and spin anisotropy constant ($SD\sim-0.07$ meV). Despite the coexistence of Weyl fermions and magnons, we find no clear evidence that the magnetic dynamics are influenced by the Weyl fermions in Sr$_{1-x}$Mn$_{1-y}$Sb$_2$, possibly because that the Weyl fermions and magnons reside in the Sb and Mn layers separately, and the interlayer coupling is weak due to the quasi-two-dimensional nature of the material, as also evident from the small $SJ_c$ of -0.1 meV.
description: 12 pages, 4 figures
Control of Arrival Time using Structured Wave Packets
Creators: name: Saxton, T. A.
name: Harris, A. L.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: Scattering dynamics are examined for Gaussian and non-Gaussian wave packets with identical momentum densities. Average arrival time delays, dwell times, and phase time delays are calculated for wave packets scattering from a square barrier, and it is shown that the non-Gaussian wave packets exhibit different average arrival time delays than the Gaussian wave packets. These differences result from the non-linear terms in the momentum wave function phase of the non-Gaussian wave packets, which alters the self-interaction times of the wave packets. Control of the average arrival time delay can be achieved through adjustment of the momentum wave function phase, independent of wave packet energy and momentum density.
Evidence of pair-density wave in doping Kitaev spin liquid on the honeycomb lattice
Creators: name: Peng, Cheng
name: Jiang, Yi-Fan
name: Devereaux, Thomas P.
name: Jiang, Hong-Chen
Publisher: name: arXiv
Year: 2020
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study the effects of doping the Kitaev model on the honeycomb lattice where the spins interact via the bond-directional interaction $J_K$, which is known to have a quantum spin liquid as its exact ground state. The effect of hole doping is studied within the $t$-$J_K$ model on a three-leg cylinder using density-matrix renormalization group. Upon light doping, we find that the ground state of the system has quasi-long-range charge-density-wave correlations but short-range single-particle correlations. The dominant pairing channel is the even-parity superconducting pair-pair correlations with $d$-wave-like symmetry, which oscillate in sign as a function of separation with a period equal to that of the spin-density wave and two times the charge-density wave. Although these correlations fall rapidly (possibly exponentially) at long distances, this is never-the-less the first example where a pair-density wave is the strongest SC order on a bipartite lattice. Our results may be relevant to ${\rm Na_2IrO_3}$ and $α$-${\rm RuCl_3}$ upon doping.
description: 8 pages, 10 figures
Gauge Dependence of ccbar Potential from Nambu-Bethe-Salpeter Wave Function in Lattice QCD
Creators: name: Zhang, Tianchen
name: Ishii, Noriyoshi
Publisher: name: arXiv
Year: 2025
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We study the gauge dependence of $c\bar{c}$ potentials extracted from Nambu-Bethe-Salpeter (NBS) wave functions. The potentials are obtained using the HAL QCD potential method, with an extension introduced by Kawanai and Sasaki for self-consistent determination of the charm quark mass. A systematic comparison is conducted between results obtained in the Coulomb and Landau gauges. The numerical calculations are performed using 2+1 flavor QCD gauge configurations with the charm quark treated in the quenched approximation. We find that the central potentials in both gauges show excellent agreement at short distances but exhibit discrepancies at large distances. We attribute these discrepancies to insufficient suppression of excited-state contamination in the Landau gauge, which affects the linear-rising behavior of the potential at large distance.
description: 11 pages, 12 figures
Lived experience of wife abuse for Indo-Canadian Sikh women
Creators: name: Badyal, Pindy
Publisher: name: University of British Columbia
Year: 2009

description: A qualitative research design, based on Colaizzi's (1978) understanding of Husserl's transcendental phenomenology, was used to explore and describe the personal experiences of wife abuse for Indo-Canadian Sikh women. Eight women volunteered to take part in this research study. The women were recruited from a social service agency in the Greater Vancouver Regional District. Data were collected through in-depth personal interviews that were audiotaped and later transcribed. Data analysis was based on the guidelines proposed by Colaizzi (1978). Five themes were identified and developed during the data analysis: (1) "An Eroding Sense of Self", components of this theme included self-doubt, self-blame, and sense of worthlessness. (2) "Changing Face of Fear", for Indo-Canadian Sikh women, fear alternated from distress about safety to worries about poverty, abandonment, and alienation. (3) "Feeling Extremely Ambivalent"; concern for the children, lack of finances, an attachment to their husbands, and the hope that they would change contributed to the women's profound ambivalence about whether to salvage or end their abusive marriages. (4) "A sense of Overwhelming Entrapment"; this theme was comprised of cultural dictates such as izzat (family honour) and the sanctity of marriage. (5) "Reclaiming Personal Strength"; the women utilized multiple sources including their religious faith, support from friends and family as well as psychotherapy to help them to reclaim personal strength. Having financial assistance, support from their families, and a safe place to go were crucial factors that enabled some of the Indo-Canadian Sikh women to leave their abusive marriages. The women showed incredible strength as they met the challenges imposed by cultural dictates such as izzat and clash of values with the dominant culture regarding marriage and family life. Despite insurmountable challenges and barriers to care, these women continued to persevere in their struggle to free themselves from the abuse in their marriages. The findings of this study point to the need for more cultural sensitivity training for various legal and health care professionals in order to offer effective and culturally sensitive care for this group of women. The implications of the findings for clinical practice are discussed and recommendations for further research are provided.
Superlattice structure in the antiferromagnetically ordered state in the Hubbard model on the Ammann-Beenker tiling
Creators: name: Koga, Akihisa
Publisher: name: arXiv
Year: 2020
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study magnetic properties in the half-filled Hubbard model on the Ammann-Beenker tiling. First, we focus on the domain structure with locally eightfold rotational symmetry to examine the strictly localized confined states for the tightbinding model. We count the number of vertices and confined states in the larger domains generated by the deflation operations systematically. Then, the fraction of the confined states, which plays an important role for magnetic properties in the weak coupling limit, is obtained as $p=1/2τ^2$, where $τ(=1+\sqrt{2})$ is the silver ratio. It is also found that the wave functions for confined states are densely distributed in the system and thereby the introduction of the Coulomb interactions immediately induces the finite staggered magnetizations. Increasing the Coulomb interactions, the spatial distribution of the magnetizations continuously changes to those of the Heisenberg model. We discuss crossover behavior in the perpendicular space representation and reveal the superlattice structure in the spatial distribution of the staggered magnetizations.
description: 9pages, 12figures
Melinda gentilis Robineau-Desvoidy 1830
Creators: name: Schlüsslmayr, Gerhard
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Calliphoridae
Melinda
Melinda gentilis

description: Melinda gentilis ROBINEAU- DESVOIDY, 1830
Bgld, Breitenbrunn, Doktorbrunngraben, 5.5.01.
Neu für Burgenland.
description: Published as part of Schlüsslmayr, Gerhard, 2018, Erstnachweise von Fliegen (Diptera) für Österreich und einige Bundesländer, pp. 765-800 in Linzer biologische Beiträge 50 (1) on page 786, DOI: 10.5281/zenodo.4004374
Consommation des engrais au Rwanda: tendances passées, potentiel futur, et facteurs déterminants
Creators: name: Kelly, Valerie A.
name: Mpyisi, Edson
name: Murekezi, Anastase
name: Neven, David
name: Kelly, Valerie A.
name: Mpyisi, Edson
name: Murekezi, Anastase
name: Neven, David
Publisher: name: Unknown
Year: 2001
Subjects: subject: Crop Production/Industries
subject: food security
subject: food policy
subject: Rwanda
subject: fertilizer consumption

description: This paper discusses aggregate national fertilizer consumption trends, patterns of fertilizer use, and the potential for increased fertilizer consumption.
description: Document préparé pour l’atelier sur l’utilisation et la commercialisation des engrais, organisé par le MINAGRI et l’USAID, Rwanda du 22 au 23 Février 2001
Conformal Mapping on Rough Boundaries I: Applications to harmonic problems
Creators: name: Vandembroucq, Damien
name: Roux, Stephane
Publisher: name: arXiv
Year: 2004
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: The aim of this study is to analyze the properties of harmonic fields in the vicinity of rough boundaries where either a constant potential or a zero flux is imposed, while a constant field is prescribed at an infinite distance from this boundary. We introduce a conformal mapping technique that is tailored to this problem in two dimensions. An efficient algorithm is introduced to compute the conformal map for arbitrarily chosen boundaries. Harmonic fields can then simply be read from the conformal map. We discuss applications to "equivalent" smooth interfaces. We study the correlations between the topography and the field at the surface. Finally we apply the conformal map to the computation of inhomogeneous harmonic fields such as the derivation of Green function for localized flux on the surface of a rough boundary.
STRUCTURAL CHANGES AND EXPERIENCES WITH LAND REFORM IN GERMAN AGRICULTURE SINCE UNIFICATION
Creators: name: Ortmann, Gerald F.
name: Ortmann, Gerald F.
Publisher: name: Unknown
Year: 1998
Subjects: Land Economics/Use
Teaching/Communication/Extension/Profession

description: Following unification of East and West Germany in 1990, the principal objective of the government was to restore previous property rights in the new federal states and to encourage competitive production structures. Institutions were quickly established to facilitate the required adjustments to a market economy. Privatisation of most firms (farms), which was an intricate and costly procedure, was accomplished within five years and resulted in a completely new farm structure in the new federal states. By 1996 over 80 percent of agricultural enterprises comprised private (individual) operations (cultivating 22 percent of land), 9,1 percent partnerships (22 percent of land), while about 3000 legal entities managed 56 percent of farm land. About 90 percent of farmland in the new states is being rented compared to 47 percent in the old states. Significantly, leasing and not selling became the most important method to privatise land in the new federal states. In 1996 the number of farming operations in Germany totalled about 540000. While worker employment in German agriculture is steadily decreasing, worker productivity is increasing - from 17 hectares of farm land per full-time equivalent worker (FTE) in 1991 to 43 hectares per FTE in the new states in 1996.