cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
A new dynamical model for the study of galactic structure
Creators: name: Zotos, Euaggelos E.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: In the present article, we present a new gravitational galactic model, describing motion in elliptical as well as in disk galaxies, by suitably choosing the dynamical parameters. Moreover, a new dynamical parameter, the S(g) spectrum, is introduced and used, in order to detect islandic motion of resonant orbits and the evolution of the sticky regions. We investigate the regular or chaotic character of motion, with emphasis in the different dynamical models and make an extensive study of the sticky regions of the system. We use the classical method of the Poincare (r-pr) phase plane and the new dynamical parameter of the S(g) spectrum. The LCE is used, in order to make an estimation of the degree of chaos in our galactic model. In both cases, the numerical calculations, suggest that our new model, displays a wide variety of families of regular orbits, compared to other galactic models. In addition to the regular motion, this new model displays also chaotic regions. Furthermore, the extent of the chaotic regions increases, as the value of the flatness parameter b of the model increases. Moreover, our simulations indicate, that the degree of chaos in elliptical galaxies, is much smaller than that in dense disk galaxies. In both cases numerical calculations show, that the degree of chaos increases linearly, as the flatness parameter b increases. In addition, a linear relationship between the critical value of angular momentum and the b parameter if found, in both cases (elliptical and disk galaxies). Some theoretical arguments to support the numerical outcomes are presented. Comparison with earlier work is also made.
description: Published in New Astronomy journal
Polaronic transport in the ferromagnetic phase of Gd1-xCaxBaCo2O5.53
Creators: name: Thirumurugan, N.
name: Sundar, C. S.
name: Bharathi, A.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Temperature dependent electrical resistivity and thermopower measurements were carried out on Gd1-xCaxBaCo2O5.53 with x varying between 0 and 0.25. Ca subsitution leads to the incorporation of holes (Co4+) into the system that leads to a reduction in resistivity and a stabilisation of the ferromagnetic phase at low temperatures. The temperature dependence of resistivity and thermopower are markedly different in the Ca doped sample, with a dramatic reduction in the resistivity, as compared to that in the pristine sample. The variation in both the resistivity and thermopower with temperature is explained in terms of the transport of polarons in the ferromagnetic phase of Ca doped system.
description: accepted
On speed of a photon in a dispersing medium
Creators: name: Ogluzdin, Valeriy E.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: On speed of a photon in a dispersing medium Ogluzdin Valeriy E. Abstract Based on the author of the experimental results and their treatment, a model that demonstrates that the real dispersive medium in spectral regions where the refractive index greater than unity, the velocity of propagation of photons in this environment corresponds to the phase velocity of light. These portions of the spectrum (for example, atomic potassium vapor or other alkali metal) are from low-frequency side of the main lines of the doublet and are available for research using tunable lasers. In the calculations took into account the fact that the atomic vapor of alkali metal used as a dispersing medium, in accordance with the theory of dispersion in the above sections of the spectrum, on the periphery of the cross section of laser beam with Gaussian intensity distribution across the beam - in the shadows refractive index n (ν) is greater than unity, and the axis of the beam, where the radiation intensity is maximum - for radiation following the leading edge of the light pulse, the refractive index is unity, which ensures smooth on the beam axis, without any delay "superluminal "propagation of light with velocity c. This fact causes the appearance of the shadow cone of Vavilov - Cherenkov radiation, indicating a slow propagation of photons from the source of the cone with phase velocity c / n (ν).
description: 4 pages (in Russian); Soviet Journal of Experimental and Theoretical Physics((1980)
Grain-size distribution dataset of supercritical flow sediments from a Gilbert-type delta that are associated with disaggregation bands
Creators: name: Tanner, David C.
name: Brandes, Christian
name: Winsemann, Jutta
Publisher: name: Amsterdam [u.a.] : Elsevier
Year: 2022
Subjects: subject: Delta sediments
subject: Disaggregation bands
subject: Faults
subject: Grain-size
subject: Supercritical flow deposits
subject: 570

description: This is a dataset of grain-size distribution in sub- and supercritical flow sediments of a Gilbert-type delta from an outcrop in North Germany. Thirteen samples of ca 2.5 kg were dried (at 105°C), and homogenised twice with a sample divider. A representative sample of 1-2 g was then analysed using laser diffraction. The grain-size distribution of the sand has a maximum between fine to medium sand, with a long fine fraction tail down to 0.06 µm and occasional coarse fractions (up to 1.5 mm) in some samples. Specific grain-size distributions correlate with the different sedimentary bedforms from which the samples were taken. This data is important for two reasons: Firstly, sedimentary structures formed by Froude supercritical flows are controlled by grain-size. However, few studies have provided grain-size datasets from the natural record, which often have a much wider grain-size distribution than experimentally-produced supercritical flow deposits. Secondly, the sands were deformed subsequently by disaggregation bands, a type of geological fault that only develops in porous granular materials, i.e. well-sorted, medium sand. The disaggregation bands are indicative of seismic or even aseismic, creeping movement of basement faults.
Blunck, Hans Friedrich. Die nordische Welt. Geschichte, Wesen und Bedeutung der nordischen Völker
Creators: name: Jacob-Friesen, Karl-Hermann
Publisher: name: Nachrichten aus Niedersachsens Urgeschichte
Year: 2020

description: Rezension zu: Blunck, Hans Friedrich. Die nordische Welt. Geschichte, Wesen und Bedeutung der nordischen Völker. Unter Mitwirkung von Fred I. Domes. 80, 651 Seiten mit zahlreichen Textabbildungen und 29 Karten und Tafeln. Propyläenverlag, Berlin 1937
description: Nachrichten aus Niedersachsens Urgeschichte, Bd. 11 (1937): Nachrichten aus Niedersachsens Urgeschichte
"PRISMA": un esempio concreto di Citizen Science applicato alla ricerca nel campo delle meteore e meteoriti
Creators: name: Gardiol, Daniele
Publisher: name: Zenodo
Year: 2024
Subjects: Citizen Science Italia
Istituto Nazionale di Astrofisica

description: PRISMA (Prima Rete Italiana per la Sorveglianza sistematica di Meteore e Atmosfera) è una rete che dispone su tutto il territorio italiano di oltre 60 telecamere, dedicate all'osservazione di meteore luminose e al recupero di meteoriti appena cadute. È promossa e coordinata dall'Istituto Nazionale di Astrofisica, l'ente pubblico di riferimento per la ricerca astronomica e astrofisica in Italia. Sin dall'inizio del progetto, nel 2016, abbiamo riscontrato una partecipazione crescente e sempre più entusiasta di non professionisti, a partire dagli astrofili fino a raggiungere un pubblico sempre più ampio tra i cittadini. Oggi PRISMA è un affermato stakeholder nel campo delle meteore e delle meteoriti, essendo il riferimento per i report visuali di testimoni oculari, la registrazione video di bolidi e la segnalazione di ritrovamenti di presunte meteoriti. Nel presente contributo sarà descritta la nostra esperienza su questo argomento e le metodologie sviluppate per sfruttare tale potenziale, formando e coinvolgendo attivamente i cittadini in attività incentrate sull'identificazione di meteoriti e in campagne di ricerca sul campo. Mostreremo come questa attività ha portato al successo del ritrovamento della meteorite Cavezzo (MO), il 4 gennaio 2020, e della meteorite Matera il 18 febbraio 2023. Queste due meteoriti appartengono al raro gruppo di meno di 50 meteoriti ritrovate nel mondo dal 1959 ad oggi grazie a reti di monitoraggio come PRISMA, e per questo hanno una importanza scientifica enorme.
Sixtan_Quantum_Numbers_and_Particle_Identity__A_Topological_Encoding_of_Particle_States
Creators: name: Sixta, David
Publisher: name: Zenodo
Year: 2025
Subjects: subject: Quantum physics

description:  This paper introduces the Sixtan Quantum Numbers (SQNs) as a topologically rooted classification system for fundamental particles. Derived from the twist-phase harmonic framework of Sixta Theory, the SQNs τ, Θ,ε,χ describe a particle’s identity based on dimensional recursion, phase structure, and chirality. Unlike conventional quantum numbers, which are empirically assigned, SQNs arise from the geometric and harmonic properties of the dimensional manifold. This paper defines each SQN, explains their physical interpretation, derives particle identities from them, and explores implications for mass, chirality, and undiscovered states.
PHA*: Finding the Shortest Path with A* in An Unknown Physical Environment
Creators: name: Ben-Yair, A.
name: Felner, A.
name: Kraus, S.
name: Netanyahu, N.
name: Stern, R.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: We address the problem of finding the shortest path between two points in an unknown real physical environment, where a traveling agent must move around in the environment to explore unknown territory. We introduce the Physical-A* algorithm (PHA*) for solving this problem. PHA* expands all the mandatory nodes that A* would expand and returns the shortest path between the two points. However, due to the physical nature of the problem, the complexity of the algorithm is measured by the traveling effort of the moving agent and not by the number of generated nodes, as in standard A*. PHA* is presented as a two-level algorithm, such that its high level, A*, chooses the next node to be expanded and its low level directs the agent to that node in order to explore it. We present a number of variations for both the high-level and low-level procedures and evaluate their performance theoretically and experimentally. We show that the travel cost of our best variation is fairly close to the optimal travel cost, assuming that the mandatory nodes of A* are known in advance. We then generalize our algorithm to the multi-agent case, where a number of cooperative agents are designed to solve the problem. Specifically, we provide an experimental implementation for such a system. It should be noted that the problem addressed here is not a navigation problem, but rather a problem of finding the shortest path between two points for future usage.
Estimations of the Distances of Stellar Collapses in the Galaxy by Analyzing the Energy Spectrum of Neutrino Bursts
Creators: name: Kemp, Ernesto
name: Miguez, Bruno
name: Fulgione, Walter
Publisher: name: arXiv
Year: 2012
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The neutrino telescopes of the present generation, depending on their specific features, can reconstruct the neutrino spectra from a galactic burst. Since the optical counterpart could be not available, it is desirable to have at hand alternative methods to estimate the distance of the supernova explosion using only the neutrino data. In this work we present preliminary results on the method we are proposing to estimate the distance from a galactic supernova based only on the spectral shape of the neutrino burst and assumptions on the gravitational binding energy released an a typical supernova explosion due to stellar collapses.
description: Proceedings of the Second International Symposium on Strong Electromagnetic Fields and Neutron Stars (SMFNS 2011) Instituto de Cibern\'etica, Matem\'atica y F\'isica (ICIMAF) Sociedad Cubana de F\'isica (SCF) Varadero, Cuba, 5-7 May 2011
Bohm, Woldtraut. Die Vorgeschichte des Kreises Westprignitz
Creators: name: Jacob-Friesen, Karl-Hermann
Publisher: name: Nachrichten aus Niedersachsens Urgeschichte
Year: 2020

description: Rezension zu: Bohm, Woldtraut. Die Vorgeschichte des Kreises Westprignitz. 8°, 200 Seiten, 85 Textabbildungen, 93 Tafeln und 9 Karten. Verlag Curt Kabitzsch, Leipzig 1937
description: Nachrichten aus Niedersachsens Urgeschichte, Bd. 11 (1937): Nachrichten aus Niedersachsens Urgeschichte
Comprendre l'évolution post COVID-19 des pratiques culturelles des usagers : le cas de la BCU Lausanne – site Riponne
Creators: name: Lebouleur, Delphine
Publisher: name: Zenodo
Year: 2024
Subjects: Usagers
Pratiques culturelles
Post COVID-19
Méthodes d'enquête
Bibliothèques

description: Ce travail de Master a été réalisé sous mandat de la Bibliothèque Cantonale et Universitaire de Lausanne (BCUL).

L’objectif consistait à fournir des éléments de compréhension sur l’évolution des pratiques culturelles de ses usagers-ères depuis 2019, période marquée par l’épidémie mondiale de COVID-19 et une accélération de la transition numérique.

A l’issue d’un constat préliminaire, basé sur une courte revue de littérature et l’étude des données induites de l’institution, nous avons mené une enquête auprès d’usagers-ères des prestations in situ et numériques de son site Riponne (questionnaire en ligne autoadministré, n = 1'900).

Nous avons ainsi investigué sur les usages de la bibliothèque, l’utilisation des différentes offres et supports numériques, mais aussi sur la fréquentation des lieux et évènements culturels et le rapport des répondants à l’information, aux loisirs et aux médias.

Bien que nos résultats ne soient représentatifs ni de l’ensemble des usagers-ères du site Riponne, ni de la population vaudoise, et de ce fait non généralisables, les données collectées sont riches et corroborent la littérature consultée. Nous avons par ailleurs privilégié les analyses par classe d’âge, en raison d’une surreprésentation des personnes les plus âgées.

Il en résulte un vaste panorama témoignant d’un fort attachement des répondants au lieu physique, bien que certains publics ne s’y rendent pas ou plus, d’une offre numérique insuffisamment connue mais attractive, d’une appropriation accélérée des formats dématérialisés, d’une population de répondants amatrice de sorties culturelles, et de phénomènes très générationnels concernant l’information, les loisirs et les médias.

La réalisation d’une analyse factorielle (ACM) et d’une classification (CAH) a en outre permis de définir une nouvelle typologie des publics parmi les répondants.

L’étude se conclut par un ensemble de recommandations visant à développer l’attractivité de la bibliothèque en tant que tiers-lieu, diffuser plus largement les offres numériques pour desservir le territoire, initier des partenariats avec d’autres acteurs-trices culturel-le-s, contribuer à la cohésion sociale par la médiation et mener des actions pour encourager l’engagement citoyen.
Bolko, Freiherr von Richthofen. Die Vor- und Frühgeschichtsforschung im neuen Deutschland
Creators: name: Jacob-Friesen, Karl-Hermann
Publisher: name: Nachrichten aus Niedersachsens Urgeschichte
Year: 2020

description: Rezension zu: Bolko, Freiherr von Richthofen. Die Vor- und Frühgeschichtsforschung im neuen Deutschland. 8°, 80 Seiten. Junker & Dünnhaupt Verlag. Berlin 1937
description: Nachrichten aus Niedersachsens Urgeschichte, Bd. 11 (1937): Nachrichten aus Niedersachsens Urgeschichte
X-ray Modeling of η Carinae and WR140 from SPH Simulations
Creators: name: Russell, Christopher M. P.
name: Owocki, Stanley P.
name: Corcoran, Michael F.
name: Okazaki, Atsuo T.
name: Madura, Thomas I.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The colliding wind binary (CWB) systems η Carinae and WR140 provide unique laboratories for X-ray astrophysics. Their wind-wind collisions produce hard X-rays that have been monitored extensively by several X-ray telescopes, including RXTE. To interpret these X-ray light curves and spectra, we apply 3D hydrodynamic simulations of the wind-wind collision using smoothed particle hydrodynamics (SPH), with the recent improvements of radiative cooling and the acceleration of the stellar winds according to a β law. For both systems, the 2-10 keV RXTE light curves are well-reproduced in absolute units for most phases, but the light curve dips associated with the periastron passages are not well matched. In WR140, the dip is too weak, and in η Carinae, the large difference in wind speeds of the two stars leads to a hot, post-periastron bubble that produces excess emission toward the end of the X-ray minimum.
description: 3 pages, 3 figures, to appear in "Four Decades of Research on Massive Stars: A Scientific Meeting in Honour of Anthony F. J. Moffatt", eds. L. Drissen, C. Robert, and N. St-Louis, ASP Conference Series
Tischler, Fritz. Fuhlsbüttel, ein Beitrag zur Sachsensrage
Creators: name: Jacob-Friesen, Karl-Hermann
Publisher: name: Nachrichten aus Niedersachsens Urgeschichte
Year: 2020

description: Rezension zu: Tischler, Fritz. Fuhlsbüttel, ein Beitrag zur Sachsensrage. Forschungen zur Vor- und Frühgeschichte aus dem Museum vorgeschichtlicher Altertümer in Kiel. 4. Band. 4°, 72 Seiten mit 41 Textabbildungen, 6 Karten, 13 Tabellen und 12 Tafeln. Karl Wachholtz Verlag, Neumünster in Holstein 1937
description: Nachrichten aus Niedersachsens Urgeschichte, Bd. 11 (1937): Nachrichten aus Niedersachsens Urgeschichte
Innovative and automated method for vortex identification
Creators: name: Canivete Cuissa, J. R.
name: Steiner, O.
Publisher: name: Les Ulis : EDP Sciences
Year: 2022
Subjects: subject: Hydrodynamics
subject: Methods: data analysis
subject: Methods: numerical
subject: Turbulence
subject: 520

description: Context. As a universally accepted definition of a vortex has not yet been established, the community lacks an unambiguous and rigorous method for identifying vortices in fluid flows. Such a method would be useful for conducting robust statistical studies on vortices in highly dynamical and turbulent systems such as the solar atmosphere. Aims. We aim to develop an innovative and robust automated methodology for the identification of vortices based on local and global characteristics of the flow, while avoiding the use of a threshold that could potentially prevent the detection of weak vortices in the process. Methods. We present a new method that combines the rigor of mathematical criteria with the global perspective of morphological techniques. The core of the method consists of an estimation of the center of rotation for every point of the flow that presents some degree of curvature in its neighborhood. For this purpose, we employed the Rortex criterion and combined it with morphological considerations of the velocity field. We then identified coherent vortical structures based on clusters of estimated centers of rotation. Results. We demonstrate that the Rortex is a more reliable criterion than the swirling strength and the vorticity for the extraction of physical information from vortical flows, because it measures the rigid-body rotational part of the flow alone and is not biased by the presence of pure or intrinsic shears. We show that the method performs well in the context of a simplistic test case composed of two Lamb-Oseen vortices. We combined the proposed method with a state-of-the-art clustering algorithm to build an automated vortex identification algorithm. The algorithm was applied to an artificial flow composed of multiple Lamb- Oseen vortices, with a random noisy background, and to the turbulent flow of a simulated magneto-hydrodynamical Orszag-Tang vortex test. The results demonstrate the reliability and accuracy of the method. Conclusions. The present automated vortex identification method can be considered a new tool for the detection and study of vortices in dynamical and turbulent (magneto)hydrodynamical flows. By applying the implemented algorithm to numerical simulations and observational data, as well as comparing it to existing detection methods, we seek to successively improve the reliability of the detections and, ultimately, our knowledge on swirling motions in the solar, stellar, and planetary atmospheres.
Performance Analysis of Decode-and-Forward Relaying in Gamma-Gamma Fading Channels
Creators: name: Bhatnagar, Manav R.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: Decode-and-forward (DF) cooperative communication based on free space optical (FSO) links is studied in this letter. We analyze performance of the DF protocol in the FSO links following the Gamma-Gamma distribution. The cumulative distribution function (CDF) and probability density function (PDF) of a random variable containing mixture of the Gamma- Gamma and Gaussian random variables is derived. By using the derived CDF and PDF, average bit error rate of the DF relaying is obtained.
description: 3 pages, 1 figure, journal
Synthesis of jet fuel hydrocarbons using furfural and bio-oxygenates
Creators: name: Dussan, Karla
name: Peters, Martin
name: Scalzullo, Stefania M.
name: Smith, Ben
name: van Zomeren, André
name: Baucherel, Xavier
name: Kraft, Axel
name: van Hal, Jaap W.
Publisher: name: Zenodo
Year: 2024

description: Presented at the symposium "Trends and technology needs for biobased fuels and chemicals", organised by EH H2020 HIGFLY project, Eindhoven, Netherlands, 20 September 2024
ЎЗЛAШТИРИШ ВA РAСТРAТA ҚИЛИШ ЖИНOЯТИНИНГ БOШҚA ЖИНOЯТЛAР БИЛAН ЎХШAШ ВA ФAРҚЛИ ЖИҲAТЛAРИ
Creators: name: Ахмедов, Асрор
Publisher: name: Zenodo
Year: 2025

description: Мулкнинг дaхлсизлигини тaъминлaш дaвлaт сиёсaти вa Ўзбекистoн Республикaси ҳуқуқни муҳoфaзa қилувчи oргaнлaр фaoлиятининг устувoр йўнaлишлaридaн ҳисoблaнaди. Кўплaб дaвлaтлaр қaтoри Ўзбекистoндa ҳaм ўзлaштириш вa рaстрaтa қилиш oрқaли мулкни тaлoн-тoрoж қилиш жинoятлaрииинг сoдир этилиши жaмиятининг ижтимoий-иқтисoдий сoҳaсидaги энг oғриқли нуқтaлaридaн биридир. Бу бoрaдa муҳтaрaм президентимиз, Шaвкaт Мирoмoнoвич тaъкидлaгaнлaридек, “oлдимиздa тургaн янa бир вaзифa хусусий мулк вa тaдбиркoрликни ривoжлaнтиришгa хaлaқит берaётгaн бaрчa тўсиқ вa чеклoвлaрни бaртaрaф этишдaн ибoрaт”,[1] дея тaъкидлaб ўтгaнлaр. Дaрҳaқиқaт иқтисoдий жинoятлaргa қaрши курaшиш фaoлияти ҳaр дoим, хусусaн иқтисoдий-сиёсий вa суд-ҳуқуқ сoҳaсидa жaдaл ислoҳoтлaр aмaлгa oшaётгaн дaврдa дoлзaрблик кaсб этaди
Monitoring Energy Consumption of Smartphones
Creators: name: Ding, Fangwei
name: Xia, Feng
name: Zhang, Wei
name: Zhao, Xuhai
name: Ma, Chengchuan
Publisher: name: arXiv
Year: 2012
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences
subject: C.4
subject: 68M20

description: With the rapid development of new and innovative applications for mobile devices like smartphones, advances in battery technology have not kept pace with rapidly growing energy demands. Thus energy consumption has become a more and more important issue of mobile devices. To meet the requirements of saving energy, it is critical to monitor and analyze the energy consumption of applications on smartphones. For this purpose, we develop a smart energy monitoring system called SEMO for smartphones using Android operating system. It can profile mobile applications with battery usage information, which is vital for both developers and users.
description: The 1st International Workshop on Sensing, Networking, and Computing with Smartphones (PhoneCom), IEEE, Dalian, China, Oct 19-22, 2011
Two-dimensional finite element simulation of fracture and fatigue behaviours of alumina microstructures for hip prosthesis
Creators: name: Kim, Kyungmok
name: Forest, Bernard
name: Géringer, Jean
Publisher: name: arXiv
Year: 2012
Subjects: subject: Medical Physics (physics.med-ph)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: This paper describes a two-dimensional (2D) finite element simulation for fracture and fatigue behaviours of pure alumina microstructures such as those found at hip prostheses. Finite element models are developed using actual Al2O3 microstructures and a bilinear cohesive zone law. Simulation conditions are similar to those found at a slip zone in a dry contact between a femoral head and an acetabular cup of hip prosthesis. Contact stresses are imposed to generate cracks in the models. Magnitudes of imposed stresses are higher than those found at the microscopic scale. Effects of microstructures and contact stresses are investigated in terms of crack formation. In addition, fatigue behaviour of the microstructure is determined by performing simulations under cyclic loading conditions. It is shown that crack density observed in a microstructure increases with increasing magnitude of applied contact stress. Moreover, crack density increases linearly with respect to the number of fatigue cycles within a given contact stress range. Meanwhile, as applied contact stress increases, number of cycles to failure decreases gradually. Finally, this proposed finite element simulation offers an effective method for identifying fracture and fatigue behaviours of a microstructure provided that microstructure images are available.
Multipartite electronic entanglement purification with charge detection
Creators: name: Sheng, Yu-Bo
name: Deng, Fu-Guo
name: Long, Gui-Lu
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We present a multipartite entanglement purification scheme in a Greenberger-Horne-Zeilinger state for electrons based on their spins and their charges. This scheme works for purification with two steps, i.e., bit-flipping error correction and phase-error flip error correction. By repeating these two steps, the parties in quantum communication can get some high-fidelity multipartite entangled electronic systems.
description: 7 pages, 2 figures
Restricted Value Iteration: Theory and Algorithms
Creators: name: Zhang, N. L.
name: Zhang, W.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Value iteration is a popular algorithm for finding near optimal policies for POMDPs. It is inefficient due to the need to account for the entire belief space, which necessitates the solution of large numbers of linear programs. In this paper, we study value iteration restricted to belief subsets. We show that, together with properly chosen belief subsets, restricted value iteration yields near-optimal policies and we give a condition for determining whether a given belief subset would bring about savings in space and time. We also apply restricted value iteration to two interesting classes of POMDPs, namely informative POMDPs and near-discernible POMDPs.
Realizing arithmetic invariants of hyperbolic 3-manifolds
Creators: name: Neumann, Walter D
Publisher: name: arXiv
Year: 2011
Subjects: subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: 57M27

description: These are mostly expository notes based on the course of lectures on arithmetic invariants of hyperbolic manifolds given at the workshop associated with the final "Volume Conference," held at Columbia University, June 2009. Some new results are included.
Cours de préparation à la naissance en réponse aux effets du dérèglement climatique à Madagascar
Creators: name: Enfants du Monde
name: Fianakavania Sambatrafisa
name: Terre Innovative Healthcare
Publisher: name: Zenodo
Year: 2024
Subjects: subject: Climatic changes
subject: Health care services
subject: Public health

description: À Madagascar, l’ONG suisse Enfants du Monde (EdM) soutient des activités de santé maternelle et néonatale (SMN) du ministère de la santé (MS) par le biais de l’association Fianakaviana Sambatrafisa (FISA) et Terre Innovative Healthcare (TI) dans les hôpitaux publics d’Antananarivo Sud et d’Ambanja.

La situation de la santé maternelle et néonatale, déjà fragile à cause du contexte économique, est aggravée par les impacts des catastrophes climatiques. Les températures élevées, les inondations, la sècheresse et les tempêtes, ont des répercussions sur la santé des femmes enceintes, la mortalité maternelle et néonatale, et la santé mentale des mères. Parmi les conséquences inquiétantes, une augmentation de l’incidence du paludisme a un impact majeur sur les femmes enceintes, les fœtus et les nouveau-nés.
EFFECT OF ADDITIVE TREATMENTS ON PHYSICOCHEMICAL AND PHYSIOLOGICAL PARAMETERS OF PEACH FRUITS DURING STORAGE
Creators: name: SHAROON MASIH
name: RIZWAN SHUKAT
name: MASOOD SADIQ BUTT
name: MUHAMMAD ANJUM ZIA
Publisher: name: Zenodo
Year: 2024
Subjects: Peach, Oxalic Acid, Calcium Chloride, Physicochemical, Physiological, Storage.

description: Abstract

Peach (Prunus persica L.) fruits have short storage life after harvest and deteriorate quickly at ambient temperature because of climacteric nature and its rapid ripening process. The present research project is designed to minimize the post-harvest losses of peach fruits by the application of additives. Purposely, Peach fruits were dipped in CaCl2 (2.0%, 3.0%), oxalic acid (2 mM, 3 mM) and one combination of CaCl2 and oxalic acid (1% CaCl2 & 1 mM oxalic acid) along with other combination of CaCl2 and oxalic acid (1.5% CaCl2 & 1.5 mM oxalic acid). Peaches were then air-dried and stored at 5°C and 85% relative humidity for 35 days. Treated samples were analyzed every week and significant variations (P<0.05) were recorded. Results depicted that total soluble solids, pH, weight loss, fruit decay index, shrinkage index, malondialdehyde content, ion leakage, increased during storage however treated fruits showed better response than control. However firmness and % acidity decreased in all peaches during storage but this decrease was significantly less in additive treated peach fruits as compared to untreated (control) fruits. Ethylene rate increases till 14th day in control fruits then after climacteric peak decreases while in treated fruits it increases till 21st day and then decreases. Conclusively, oxalic acid (3 mM) concentration treatment better retained the physicochemical and physiological parameters of the peach fruits.
On the Validity of the Law of Mass Action in Three-Dimensional Coagulation Processes
Creators: name: Winkler, Anton
name: Frey, Erwin
Publisher: name: arXiv
Year: 2012
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Diffusion limited reactions are studied in detail on the classical coalescing process. We demonstrate how, with the aid of a recent renormalization group approach, fluctuations can be integrated systematically. We thereby obtain an exact relation between the microscopic physics (lattice structure, particle shape and size) and the macroscopic decay rate in the law of mass action. Moreover, we find a strong violation of the law of mass action. The corresponding term in the kinetic equations originates in long wavelength fluctuations and is a universal function of the macroscopic decay rate.
description: 4 pages, 4 figures and supplementary information. To appear in Physical Review Letters
Nabiści i bracia Natansonowie Historia paryskiej kolekcji
Creators: name: Ziembińska, Ewa
Publisher: name: Pamiętnik Sztuk Pięknych / Fine Arts Diary
Year: 2019

description: Pamiętnik Sztuk Pięknych / Fine Arts Diary, Bd. 10 (2015): Pamiętnik Sztuk Pięknych / Fine Arts Diary
Gyrofluid simulations of collisionless reconnection in the presence of diamagnetic effects
Creators: name: Tassi, Emanuele
name: Waelbroeck, F.
name: Grasso, D.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: The effects of the ion Larmor radius on magnetic reconnection are investigated by means of numerical simulations, with a Hamiltonian gyrofluid model. In the linear regime, it is found that ion diamagnetic effects decrease the growth rate of the dominant mode. Increasing ion temperature tends to make the magnetic islands propagate in the ion diamagnetic drift direction. In the nonlinear regime, diamagnetic effects reduce the final width of the island. Unlike the electron density, the guiding center density does not tend to distribute along separatrices and at high ion temperature, the electrostatic potential exhibits the superposition of a small scale structure, related to the electron density, and a large scale structure, related to the ion guiding-center density.
Atomic parity violation in two-photon J=0-to-1 transitions
Creators: name: Dounas-Frazer, D. R.
name: Tsigutkin, K.
name: English, D.
name: Budker, D.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We present a method for measuring nuclear-spin-dependent atomic parity violation without nuclear-spin-independent background. Such measurements can be achieved by observing interference of parity-conserving and parity-violating two-photon J=0-to-1 transitions driven by collinear photons of the same frequency in the presence of an external static magnetic field.
description: 6 pages, 1 figure, submitted to Il Nuovo Cimento C (PAVI 2011 conference proceedings)
Między Secesją a Hagenbundem – artyści polscy w Wiedniu 1898–1914
Creators: name: Kudelska, Dorota
Publisher: name: Pamiętnik Sztuk Pięknych / Fine Arts Diary
Year: 2019

description: Pamiętnik Sztuk Pięknych / Fine Arts Diary, Bd. 10 (2015): Pamiętnik Sztuk Pięknych / Fine Arts Diary
Binding of the feature stimulus duration in the auditory domain: S-R or S-S binding; or both?
Creators: name: Köllnberger, Katrin
name: Bogon, Johanna
name: Dreisbach, Gesine
Publisher: name: Universität Regensburg
Year: 2024
Subjects: subject: Feature binding; partial repetition costs; temporal features; stimulus-stimulus binding; stimulus-response binding; time perception
subject: 150 Psychologie

description: Perceiving and reacting to multidimensional objects creates so-called event files via feature binding. Bogon, Thomaschke, and Dreisbach provided the first evidence for the integration of the feature stimulus duration into such event files. However, their paradigm did not allow for differentiation between stimulus-stimulus and stimulus-response binding.
This study used a classification task with many-to-one mappings to examine the integration of stimulus and response features independently. Experiment 1 used a pitch classification task. Participants had to respond with a left keypress to a low and a very low sine tone and with a right keypress to a high and very high sine tone. The four sine tones were presented for either a short or long duration, resulting in a total of eight stimuli. As an indicator of binding, we used partial repetition costs (better performance when both pitch/response and duration repeat or shift relative to partial repetitions). Results of Experiment 1 indicate stimulus-response binding and no stimulus-stimulus binding. In Experiment 2, instead of classifying the pitch of artificial sine tones, participants had to classify the type of musical instruments that produced the stimulus tones. Results replicated evidence for stimulus-response binding but also provided indications for stimulus-stimulus binding. Potential reasons for this result pattern and the relevance of duration in a musical context as one potential moderator of stimulus-stimulus bindings are discussed.
Od spraw narodowych do uciech doczesnych, czyli o galicyjskich „swojskich” drukach użytkowych z początku XX wieku
Creators: name: Kulig-Janarek, Krystyna
Publisher: name: Pamiętnik Sztuk Pięknych / Fine Arts Diary
Year: 2019

description: Pamiętnik Sztuk Pięknych / Fine Arts Diary, Bd. 10 (2015): Pamiętnik Sztuk Pięknych / Fine Arts Diary
The 6dF Galaxy Survey: The Near-Infrared Fundamental Plane of Early-Type Galaxies
Creators: name: Magoulas, Christina
name: Springob, Christopher M.
name: Colless, Matthew
name: Jones, D. Heath
name: Campbell, Lachlan A.
name: Lucey, John R.
name: Mould, Jeremy
name: Jarrett, Tom
name: Merson, Alex
name: Brough, Sarah
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We determine the near-infrared Fundamental Plane (FP) for $\sim10^4$ early-type galaxies in the 6dF Galaxy Survey (6dFGS). We fit the distribution of central velocity dispersion, near-infrared surface brightness and half-light radius with a three-dimensional Gaussian model using a maximum likelihood method. For the 6dFGS $J$ band sample we find a FP with $R_{e}$\,$\propto$\,$σ_0^{1.52\pm0.03}I_{e}^{-0.89\pm0.01}$, similar to previous near-IR determinations and consistent with the $H$ and $K$ band Fundamental Planes once allowance is made for differences in mean colour. The overall scatter in $R_e$ about the FP is $σ_r$,=,29%, and is the quadrature sum of an 18% scatter due to observational errors and a 23% intrinsic scatter. Because of the distribution of galaxies in FP space, $σ_r$ is not the distance error, which we find to be $σ_d$,=,23%. Using group richness and local density as measures of environment, and morphologies based on visual classifications, we find that the FP slopes do not vary with environment or morphology. However, for fixed velocity dispersion and surface brightness, field galaxies are on average 5% larger than galaxies in higher-density environments, and the bulges of early-type spirals are on average 10% larger than ellipticals and lenticulars. The residuals about the FP show significant trends with environment, morphology and stellar population. The strongest trend is with age, and we speculate that age is the most important systematic source of offsets from the FP, and may drive the other trends through its correlations with environment, morphology and metallicity.
description: 29 pages, 20 figures, accepted for publication in MNRAS. A version of this paper with fully interactive 3D figures, viewable with Adobe Reader 8.0 or higher, can be accessed from: http://www.aao.gov.au/6dFGS/Publications/REFEREED/fpfit_paper3d.pdf
Późna twórczość artystów Uwagi na marginesie rysunku Henriego- -Josepha Harpignièsa Pejzaż leśny (1907) ze zbiorów Muzeum Narodowego w Warszawie
Creators: name: Guze, Justyna
Publisher: name: Pamiętnik Sztuk Pięknych / Fine Arts Diary
Year: 2019

description: Pamiętnik Sztuk Pięknych / Fine Arts Diary, Bd. 10 (2015): Pamiętnik Sztuk Pięknych / Fine Arts Diary
Collective and individual practices in popular music: Differences between semi-professionals and professionals in Austria and Germany
Creators: name: Schmidt, Simon
name: Gruber, Hans
Publisher: name: Universität Regensburg
Year: 2024
Subjects: subject: Collective practice, deliberate practice, individual practice, music bands, popular music
subject: 370 Erziehung, Schul- und Bildungswesen

description: Collective and individual practices are essential for popular music bands and their members when preparing for public performances. This study addresses the interplay of collective and individual practices in a sample of 82 members of semi-professional and professional popular music bands in Austria and Germany. Utilizing a structured questionnaire, practices were assessed within collective and individual practice contexts, and attributes and experiences pertinent to the current band and individual members were examined in terms of their reciprocal interplay, differences between semi-professionals and professionals, and relationships with the experience variables of groups and individuals. The results showed that collective and individual deliberate practices and the use of practice strategies were related in both practice contexts. Members of professional popular music bands invested significantly less time in collective practice for fun and significantly more time in individual deliberate practice. The results provide deeper insights into the interplay of collective and individual practices in music bands, the differences between semi-professional and professional practice designs, and the relevance of practice and professional experience for accomplishing professional music performance in general.
A Maximal Tractable Class of Soft Constraints
Creators: name: Cohen, D.
name: Cooper, M.
name: Jeavons, P.
name: Krokhin, A.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Many researchers in artificial intelligence are beginning to explore the use of soft constraints to express a set of (possibly conflicting) problem requirements. A soft constraint is a function defined on a collection of variables which associates some measure of desirability with each possible combination of values for those variables. However, the crucial question of the computational complexity of finding the optimal solution to a collection of soft constraints has so far received very little attention. In this paper we identify a class of soft binary constraints for which the problem of finding the optimal solution is tractable. In other words, we show that for any given set of such constraints, there exists a polynomial time algorithm to determine the assignment having the best overall combined measure of desirability. This tractable class includes many commonly-occurring soft constraints, such as 'as near as possible' or 'as soon as possible after', as well as crisp constraints such as 'greater than'. Finally, we show that this tractable class is maximal, in the sense that adding any other form of soft binary constraint which is not in the class gives rise to a class of problems which is NP-hard.
Odaliski, Persjanki, Superby… Wizja kobiety orientalnej w twórczości Pantaleona Szyndlera
Creators: name: Wójcik, Agata
Publisher: name: Pamiętnik Sztuk Pięknych / Fine Arts Diary
Year: 2019

description: Pamiętnik Sztuk Pięknych / Fine Arts Diary, Bd. 10 (2015): Pamiętnik Sztuk Pięknych / Fine Arts Diary
L'influence du leader d'opinion dans la diffusion de l'information
Creators: name: IMANE MARGOM
name: MOHAMMED BEN AMAR
Publisher: name: Zenodo
Year: 2024

description: Cet article explore le rôle crucial des leaders d'opinion dans la diffusion de l'information, en retraçant l'origine du concept à travers la théorie du "two-step flow" de Lazarsfeld et al. (1944) et en examinant le processus de diffusion selon la théorie de Rogers (1983). Le leader d'opinion, en tant qu'intermédiaire clé entre les médias et le public, influence de manière significative les perceptions et les comportements des individus dans divers contextes sociaux. L'article souligne l'intérêt stratégique des leaders d'opinion pour les entreprises, en raison de leur capacité à influencer les décisions d'achat via le bouche-à-oreille et l'échange interpersonnel en exposant leurs dimensions et typologies.
Pulsation spectrum of Delta Sct stars: the binary HD 50870 as seen with CoRoT and HARPS
Creators: name: Mantegazza, L.
name: Poretti, E.
name: Michel, E.
name: Rainer, M.
name: Baudin, F.
name: Hernandez, A. Garcia
name: Semaan, T.
name: Alvarez, M.
name: Amado, P. J.
name: Garrido, R.
name: Mathias, P.
name: Moya, A.
name: Suarez, J. C.
name: Auvergne, M.
name: Baglin, A.
name: Catala, C.
name: Samadi, R.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present the results obtained with the CoRoT satellite for HD 50870, a Delta Sct star which was observed for 114.4 d. The 307,570 CoRoT datapoints were analysed with different techniques. The photometric observations were complemented over 15 nights of high-resolution spectroscopy with HARPS on a baseline of 25 d. Some uvby photometric observations were also obtained to better characterize the pulsation modes. HD 50870 proved to be a low-amplitude, long-period spectroscopic binary system seen almost pole-on (i~21 deg. The brighter component, which also has the higher rotational velocity (v sin i=37.5 km/s), is a delta Sct-type variable. There is a dominant axisymmetric mode (17.16 c/d). After the detection of about 250 terms (corresponding to an amplitude of about 0.045 mmag) a flat plateau appears in the power spectrum in the low-frequency region up to about 35 c/d. We were able to detect this plateau only thanks to the short cadence sampling of the CoRoT measurements (32 s). The density distribution vs. frequency of the detected frequencies seems rule out the possibility that this plateau is the result of a process with a continuum power spectrum. The spacings of the strongest modes suggest a quasi-periodic pattern. We failed to find a satisfactory seismic model that simultaneously matches the frequency range, the position in the HR diagram, and the quasi-periodic pattern interpreted as a large separation. Nineteen modes were detected spectroscopically from the line profile variations and associated to the photometric ones. Tentative l,m values have been attributed to the modes detected spectroscopically. Prograde as well as retrograde modes are present with l degree values up to 9. There are no traces of variability induced by solar-like oscillations.
description: 14 pages, 21 figures. Accepted for publication in A&A
First Results from Pan-STARRS1: Faint, High Proper Motion White Dwarfs in the Medium-Deep Fields
Creators: name: Tonry, J. L.
name: Stubbs, C. W.
name: Kilic, M.
name: Flewelling, H. A.
name: Deacon, N . R.
name: Chornock, R.
name: Berger, E.
name: Burgett, W. S.
name: Chambers, K. C.
name: Kaiser, N.
name: Kudritzki, R-P.
name: Hodapp, K. W.
name: Magnier, E. A.
name: Morgan, J. S.
name: Price, P. A.
name: Wainscoat, R. J.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The Pan-STARRS1 survey has obtained multi-epoch imaging in five bands (Pan-STARRS1 gps, rps, ips, zps, and yps) on twelve "Medium Deep Fields", each of which spans a 3.3 degree circle. For the period between Apr 2009 and Apr 2011 these fields were observed 50-200 times. Using a reduced proper motion diagram, we have extracted a list of 47 white dwarf (WD) candidates whose Pan-STARRS1 astrometry indicates a non-zero proper motion at the 6-sigma level, with a typical 1-sigma proper motion uncertainty of 10 mas/yr. We also used astrometry from SDSS (when available) and USNO-B to assess our proper motion fits. None of the WD candidates exhibits evidence of statistically significant parallaxes, with a typical 1-sigma uncertainty of 8 mas. Twelve of these candidates are known WDs, including the high proper motion (1.7"/yr) WD LHS 291. We confirm three more objects as WDs through optical spectroscopy. Based on the Pan-STARRS1 colors, ten of the stars are likely to be cool WDs with 4170 K Teff 5000 K and cooling ages <9 Gyr. We classify these objects as likely thick disk WDs based on their kinematics. Our current sample represents only a small fraction of the Pan-STARRS1 data. With continued coverage from the Medium Deep Field Survey and the 3pi survey, Pan-STARRS1 should find many more high proper motion WDs that are part of the old thick disk and halo.
description: 33 pages, 8 figures, submitted to ApJ