cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Unitary equivalence between ordinary intelligent states and generalized intelligent states
Creators: name: Nha, Hyunchul
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Ordinary intelligent states (OIS) hold equality in the Heisenberg uncertainty relation involving two noncommuting observables {A, B}, whereas generalized intelligent states (GIS) do so in the more generalized uncertainty relation, the Schrodinger-Robertson inequality. In general, OISs form a subset of GISs. However, if there exists a unitary evolution U that transforms the operators {A, B} to a new pair of operators in a rotation form, it is shown that an arbitrary GIS can be generated by applying the rotation operator U to a certain OIS. In this sense, the set of OISs is unitarily equivalent to the set of GISs. It is the case, for example, with the su(2) and the su(1,1) algebra that have been extensively studied particularly in quantum optics. When these algebras are represented by two bosonic operators (nondegenerate case), or by a single bosonic operator (degenerate case), the rotation, or pseudo-rotation, operator U corresponds to phase shift, beam splitting, or parametric amplification, depending on two observables {A, B}.
description: published version, 4 pages
Chumma tsitsikamma Jocqué & Alderweireldt 2018, sp. nov.
Creators: name: Jocqué, Rudy
name: Alderweireldt, Mark
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Araneae
Chummidae
Chumma
Chumma tsitsikamma

description: Chumma tsitsikamma sp. nov.
urn:lsid:zoobank.org:act: A9071899-EE0D-4AF2-B73A-F3039827CE96
Figs 10 A–C, 11A–E, 12
Diagnosis
Males of C. tsitsikamma sp. nov. are recognized by the dorsal bifid RTA with a sharp spur pointing up and backward, and by the solid embolus pointing down.
Etymology
The specific epithet is a noun in apposition taken from the type locality.
Material examined
Holotype
SOUTH AFRICA: ♂, Eastern Cape Province, Tsitsikamma National Park, 34°00.742′ S, 23°52.282′ E, high moisture coastal forest, 24 Dec. 2011, J.A. Neethling and C. Luwes leg. (NCA 2012/4034).
Paratypes
SOUTH AFRICA: 3 ♂♂, same collecting data as for holotype (NCA 2015/4659).
Description
Male
BODY MEASUREMENTS. TL 2.57, CL 1.10, CW 1.00, CH 0.50.
CARAPACE. Pale yellow with slightly darker striae and cephalic area; chelicerae, legs and sternum pale yellow (Fig. 11 A–B).
ABDOMEN. With pale brown scutum, strongly narrowed in front; anterior third with supple setae, the frontal rows with sockets in front of pale circle; scutum with four impressed apodemes and two dorsal and two lateral depressions; sides and venter white, with two rows of apodemes.
EYES. AME: 0.20; ALE: 0.33; AME–AME: 0.07; AME–ALE: 0.03; PME: 0.30; PLE: 0.33; PME–PME: 0.17; PME–PLE: 0.07. Clypeus 0.27 or 0.82 times width of ALE.
STERNUM. Length 1.83, width 1.77, almost as long as wide.
LEGS. Anterior pairs of tarsi fusiform.
LEG MEASUREMENTS.
PALP (Figs 10 A–C, 11C–E). Tibia with two apophyses: dorsal one flat, truncated, at its base with sharp spur pointing up and backward; ventral one robust, short with concave ventral side; tegulum with short retrolateral and ventral protrusions; embolus solid, twisted, sharp prong, pointing ventrad.
Female
Unknown.
Note
It is not impossible that the females here described as C. bicolor sp. nov. belong to the same species. The difference in habitus and mainly the absence of black patches in C. tsitsikamma sp. nov. made us decide to keep them apart.
Distribution
Known from the Tsitsikamma National Park in the Eastern Cape Province in South Africa (Fig. 12).
description: Published as part of Jocqué, Rudy & Alderweireldt, Mark, 2018, New Chummidae (Araneae): quadrupling the size of the clade, pp. 1-25 in European Journal of Taxonomy 412 on pages 20-23, DOI: 10.5852/ejt.2018.412, http://zenodo.org/record/3806047
Searching for light long-lived neutralinos at Super-Kamiokande
Creators: name: Candia, Pablo
name: Cottin, Giovanna
name: Méndez, Andrés
name: Muñoz, Víctor
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Light neutralinos could be copiously produced from the decays of mesons generated in cosmic-ray air showers. These neutralinos can be long-lived particles in the context of R-parity violating (RPV) supersymmetric models, implying that they could be capable of reaching the surface of the earth and decay within the instrumental volume of large neutrino detectors. In this letter, we use atmospheric neutrino data from the Super-Kamiokande experiment to derive novel constraints for the RPV couplings involved in the production of long-lived light neutralinos from the decays of charged $D$-mesons and kaons. Our results highlight the potential of neutrino detectors to search for long-lived particles, by demonstrating that it is possible to explore regions of parameter space that are not yet constrained by any fixed-target nor collider experiments.
description: Version accepted for publication in PRD. 11 pages, 7 figures
Novel constraints on light elementary particles and extra-dimensional physics from the Casimir effect
Creators: name: Decca, R. S.
name: Lopez, D.
name: Fischbach, E.
name: Klimchitskaya, G. L.
name: Krause, D. E.
name: Mostepanenko, V. M.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We present supplementary information on the recent indirect measurement of the Casimir pressure between two parallel plates using a micromachined oscillator. The equivalent pressure between the plates is obtained by means of the proximity force approximation after measuring the force gradient between a gold coated sphere and a gold coated plate. The data are compared with a new theoretical approach to the thermal Casimir force based on the use of the Lifshitz formula, combined with a generalized plasma-like dielectric permittivity which takes into account interband transitions of core electrons. The theoretical Casimir pressures calculated using the new approach are compared with those computed in the framework of the previously used impedance approach and also with the Drude model approach. The latter is shown to be excluded by the data at a 99.9% confidence level within a wide separation range from 210 to 620 nm. The level of agreement between the data and theoretical approaches based on the generalized plasma model, or the Leontovich surface impedance, is used to set stronger constraints on the Yukawa forces predicted from the exchange of light elementary particles and/or extra-dimensional physics. The resulting constraints are the strongest in the interaction region from 20 to 86 nm with a largest improvement by a factor of 4.4 at 26 nm.
description: 13 pages, 6 figures, 2 tables, svjor.cls is used, to appear in Eur. Phys. J. C
Complete cosmological model based on a asymmetric scalar Higgs doublet
Creators: name: Ignat'ev, Yu. G.
name: Kokh, I. A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: A study of a complete cosmological model based on an asymmetric scalar doublet represented by the classical and phantom scalar Higgs fields is carried out. At the same time, the assumption about the nonnegativity of the expansion rate of the Universe, which in some cases contradicts the complete system of Einstein's equations, was removed. A closed system of dynamic equations describing the evolution of the cosmological model is formulated, and the dependence of the topology of the Einstein - Higgs hypersurface of the 5-dimensional phase space of the dynamical system that determines the global properties of the cosmological model on the fundamental constants of the model is investigated. A qualitative analysis of the dynamical system of the corresponding cosmological model is carried out, asymptotic phase trajectories are constructed, and the results of numerical modeling are presented, illustrating various types of behavior of the cosmological model.
description: 30 pages, 66 figures, 52 references
D-brane Description of New Open String Solutions in AdS(5)
Creators: name: Kluson, J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this paper we find D-brane descriptions of some of new open string solutions that were found in 0804.3438[hep-th]. These D5-brane and D3-brane configurations give gravitational dual descriptions of Wilson loops in some particular representations.
description: 13 pages, references added
Survival of five forage species after aerial seeding on snow
Creators: name: Brooke, Barbara M.
Publisher: name: University of British Columbia
Year: 2010

description: In aerial seeding of clearcut-logged sites above 1000 m elevation near Kamloops, British Columbia, mixtures of 5 forage species have been applied; orchardgrass (Dactylis glomerata L.), timothy (Phleum pratense L.), smooth brome (Bromus inermis Leyss.), alsike clover (Trifolium hybridum L.), and white clover (T. repens. L.). Seeding has been done by the B.C. Ministry of Forests during winter when such sites are snow-covered. A survey of stand establishment on operational winter seedings resulted in survival estimates for orchardgrass (2.3%), timothy(1.2%) and bromegrass(1.3%),in contrast to the 0.1% survival observed for clover species. On operational spring seedings, grass survival was 1.3%, 0.5% and 1.9% respectively for the above three species, while clover survival was 2.6%. In high elevation date-of-seeding trials established on a new clearcut winter mortality of clover seeds occurred after all seeding dates. First and second year clover plant establishment averaged 1.5% and 0.2% respectively for winter seedings (Nov. 11 to Mar. 22) compared to 20.5% and 13.2% for the May 2 seeding. Orchardgrass seeds were not damaged during the winter and first and second year survival of winter seedings was 43.8% and 21.9% compared to 37% and 12% for the spring (May) seeding. When broadcast from an aircraft, seed of the five species became lodged in the upper snowpack and soon after deposition were able to imbibe melt water. A model snowpack was developed in the laboratory to show that when the snow melted, pack shrinkage was localized at the top and that grass and clover seeds did not sink into the pack. In the field a similar pattern was observed; shrinkage was localized in the top of the pack so that seed was eventually exposed on the surface of the remaining pack. Therefore, seeds broadcast on any date in winter would eventually be located on the pack surface, regardless of the occurrence of post-seedng snowfalls. Field measurements showed that rapid freezing and thawing could occur in the upper layers of the pack. Laboratory simulation of such freeze-thaw cycling caused significant reductions (r₂=0.71;P<0.05) in alsike clover viability while not apparently affecting that of orchardgrass (r₂=0.10;NS). The effects on viability could not be explained by changes in seed moisture content of the two species. It is concluded that no date during winter is suitable for snow seeding of alsike and white clover on high elevation clearcut sites at Kamloops.
Marion Brandt (Hrsg.), Solidarität mit Polen. Zur Geschichte und Gegenwart der deutschen Polenfreundschaft
Creators: name: Spät, Robert
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 2015

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 64 Nr. 1 (2015)
Are There Enough Ionizing Photons to Reionize the Universe by z=6?
Creators: name: Gnedin, Nickolay Y.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: An estimate for the number of ionizing photons per baryon as a function of redshift is computed based on the plausible extrapolation of the observed galaxy UV luminosity function and the latest results on the properties of the escape fraction of ionizing radiation. It is found that, if the escape fraction for low mass galaxies (Mtot<10^{11}Msun) is assumed to be negligibly small, as indicated by numerical simulations, then there are not enough ionizing photons to reionize the universe by z=6 for the cosmology favored by the WMAP 3rd year results, while the WMAP 1st year cosmology is marginally consistent with the reionization requirement. The escape fraction as a function of galaxy mass would have to be constant to within a factor of two for the whole mass range of galaxies for reionization to be possible within the WMAP 3rd year cosmology.
description: submitted to ApJ. Comments and objections are welcome
Emergent parametric resonances and time-crystal phases in driven BCS systems
Creators: name: Collado, H. P. Ojeda
name: Usaj, Gonzalo
name: Balseiro, C. A.
name: Zanette, Damián H.
name: Lorenzana, José
Publisher: name: arXiv
Year: 2021
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We study the out-of-equilibrium dynamics of a Bardeen-Cooper-Schrieffer condensate subject to a periodic drive. We demonstrate that the combined effect of drive and interactions results in emerging parametric resonances, analogous to a vertically driving pendulum. In particular, Arnold tongues appear when the driving frequency matches $2Δ_0/n$, with $n$ a natural number, and $Δ_0$ the equilibrium gap parameter. Inside the Arnold tongues we find a commensurate time-crystal condensate which retains the $U(1)$ symmetry breaking of the parent superfluid/superconducting phase and shows an additional time-translational symmetry breaking. Outside these tongues, the synchronized collective Higgs mode found in quench protocols is stabilized without the need of a strong perturbation. Our results are directly relevant to cold-atom and condensed-matter systems and do not require very long energy relaxation times to be observed.
Nanoscale superconducting properties of amorphous W-based deposits grown with focused-ion-beam
Creators: name: Guillamon, I.
name: Suderow, H.
name: Vieira, S.
name: Fernandez-Pacheco, A.
name: Sese, J.
name: Cordoba, R.
name: De Teresa, J. M.
name: Ibarra, M. R.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We present very low temperature Scanning Tunneling Microscopy and Spectroscopy (STM/S) measurements in W-based amorphous superconducting nanodeposits grown using a metal-organic precursor and focused-ion-beam. The superconducting gap closely follows s-wave BCS theory, and STS images under magnetic fields show a hexagonal vortex lattice whose orientation is related to features observed in the topography through STM. Our results demonstrate that the superconducting properties at the surface of these deposits are very homogeneous, down to atomic scale. This, combined with the huge nanofabrication possibilities of the focused-ion-beam technique, paves the way to use focused-ion-beam to make superconducting circuitry of many different geometries.
Aspects of power corrections in hadron-hadron collisions
Creators: name: Dasgupta, Mrinal
name: Delenda, Yazid
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The program of understanding inverse-power law corrections to event shapes and energy flow observables in e+ e- annihilation to two jets and DIS (1+1) jets has been a significant success of QCD phenomenology over the last decade. The important extension of this program to similar observables in hadron collisions is not straightforward, being obscured by both conceptual and technical issues. In this paper we shed light on some of these issues by providing an estimate of power corrections to the inter-jet E_t flow distribution in hadron collisions using the techniques that were employed in the e+ e- annihilation and DIS cases.
description: 15 pages, 1 figure, uses JHEP3.cls
Meson widths from string worldsheet instantons
Creators: name: Faulkner, Thomas
name: Liu, Hong
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We show that open strings living on a D-brane which lies outside an AdS black hole can tunnel into the black hole through worldsheet instantons. These instantons have a simple interpretation in terms of thermal quarks in the dual Yang-Mills (YM) theory. As an application we calculate the width of a meson in a strongly coupled quark-gluon plasma which is described holographically as a massless mode on a D7 brane in AdS_5 \times S_5. While the width of the meson is zero to all orders in the 1/\sqrtλ expansion with λthe 't Hooft coupling, it receives non-perturbative contributions in 1/\sqrtλ from worldsheet instantons. We find that the width increases quadratically with momentum at large momentum and comment on potential phenomenological implications of this enhancement for heavy ion collisions. We also comment on how this non-perturbative effect has important consequences for the phase structure of the YM theory obtained in the classical gravity limit.
description: 6 pages, 3 figures
Hilbert space structure and positive operators
Creators: name: Drivaliaris, D.
name: Yannakakis, N.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 46B03; 46C15; 47B99

description: Let X be a real Banach space. We prove that the existence of an injective, positive, symmetric and not strictly singular operator from X into its dual implies that either X admits an equivalent Hilbertian norm or it contains a nontrivially complemented subspace which is isomorphic to a Hilbert space. We also treat the non-symmetric case.
Optimal reference states for maximum accessible entanglement under the local particle number superselection rule
Creators: name: White, G. A.
name: Vaccaro, J. A.
name: Wiseman, H. M.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Global conservation laws imply superselection rules (SSR) which restrict the operations that are possible on any given state. Imposing the additional constraint of local operations and classical communication (LOCC) forbids the transfer of quantum systems between spatially separated sites. In the case of particle conservation this imposes a SSR for local particle number. That is, the coherences between subspaces of fixed particle number at each site are not accessible and any state is therefore equivalent to its projection onto these subspaces. The accessible entanglement under the SSR is less than (or equal to) that available in the absence of the SSR. An ancilla can be used as a reference system to increase the amount of accessible entanglement. We examine the relationship between local particle number uncertainty and the accessible entanglement and consider the optimal reference states for recovering entanglement from certain systems. In particular we derive the optimal ancilla state for extracting entanglement for a single shared particle and make steps towards the optimum for general systems.
description: 14 pages, 6 figures, clarified a key result but otherwise mostly minor changes
Intensity-Based Registration of Freehand 3D Ultrasound and CT-scan Images of the Kidney
Creators: name: Leroy, Antoine
name: Mozer, Pierre
name: Payan, Yohan
name: Troccaz, Jocelyne
Publisher: name: arXiv
Year: 2007
Subjects: subject: Medical Physics (physics.med-ph)
subject: FOS: Physical sciences

description: This paper presents a method to register a pre-operative Computed-Tomography (CT) volume to a sparse set of intra-operative Ultra-Sound (US) slices. In the context of percutaneous renal puncture, the aim is to transfer planning information to an intra-operative coordinate system. The spatial position of the US slices is measured by optically localizing a calibrated probe. Assuming the reproducibility of kidney motion during breathing, and no deformation of the organ, the method consists in optimizing a rigid 6 Degree Of Freedom (DOF) transform by evaluating at each step the similarity between the set of US images and the CT volume. The correlation between CT and US images being naturally rather poor, the images have been preprocessed in order to increase their similarity. Among the similarity measures formerly studied in the context of medical image registration, Correlation Ratio (CR) turned out to be one of the most accurate and appropriate, particularly with the chosen non-derivative minimization scheme, namely Powell-Brent's. The resulting matching transforms are compared to a standard rigid surface registration involving segmentation, regarding both accuracy and repeatability. The obtained results are presented and discussed.
T-KAER: Transparency-enhanced Knowledge-Augmented Entity Resolution Framework
Creators: name: Li, Lan
name: Fang, Liri
name: Liu, Yiren
name: Torvik, Vetle I.
name: Ludaescher, Bertram
Publisher: name: arXiv
Year: 2024
Subjects: subject: Computation and Language (cs.CL)
subject: Databases (cs.DB)
subject: FOS: Computer and information sciences

description: Entity resolution (ER) is the process of determining whether two representations refer to the same real-world entity and plays a crucial role in data curation and data cleaning. Recent studies have introduced the KAER framework, aiming to improve pre-trained language models by augmenting external knowledge. However, identifying and documenting the external knowledge that is being augmented and understanding its contribution to the model's predictions have received little to no attention in the research community. This paper addresses this gap by introducing T-KAER, the Transparency-enhanced Knowledge-Augmented Entity Resolution framework.
 To enhance transparency, three Transparency-related Questions (T-Qs) have been proposed: T-Q(1): What is the experimental process for matching results based on data inputs? T-Q(2): Which semantic information does KAER augment in the raw data inputs? T-Q(3): Which semantic information of the augmented data inputs influences the predictions? To address the T-Qs, T-KAER is designed to improve transparency by documenting the entity resolution processes in log files.
 In experiments, a citation dataset is used to demonstrate the transparency components of T-KAER. This demonstration showcases how T-KAER facilitates error analysis from both quantitative and qualitative perspectives, providing evidence on "what" semantic information is augmented and "why" the augmented knowledge influences predictions differently.
description: Accepted by IDCC 2024
Experimental realization of negative refraction and subwavelength imaging for flexural waves in phononic crystal plates
Creators: name: Danawe, Hrishikesh
name: Tol, Serife
Publisher: name: arXiv
Year: 2021
Subjects: subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: In this paper, we numerically and experimentally demonstrate negative refraction of flexural waves in phononic crystal(PC) plates which is employed for designing flat elastic lenses. We propose a thickness contrast-based plate design to achieve refractive index equal to -1 at the interface of the PC and host plate. The thickness contrast between the PC and host plate enables matching their wave numbers in the all angle negative refraction (AANR) frequency regime. The PC-lens design is then numerically and experimentally verified to achieve the image of an omnidirectional subwavelength excitation source. By changing the thickness contrast between the plate and PC, the PC-lens can be tuned for wave focusing and subwavelength imaging at a desired frequency.
La fiabilité des informations sur le web
Creators: name: Jacquemin, Bernard
name: Lauf, Aurélien
name: Poudat, Céline
name: Hurault-Plantet, Martine
name: Auray, Nicolas
Publisher: name: arXiv
Year: 2008
Subjects: subject: Information Retrieval (cs.IR)
subject: Computation and Language (cs.CL)
subject: Computers and Society (cs.CY)
subject: FOS: Computer and information sciences

description: Online IR tools have to take into account new phenomena linked to the appearance of blogs, wiki and other collaborative publications. Among these collaborative sites, Wikipedia represents a crucial source of information. However, the quality of this information has been recently questionned. A better knowledge of the contributors' behaviors should help users navigate through information whose quality may vary from one source to another. In order to explore this idea, we present an analysis of the role of different types of contributors in the control of the publication of conflictual articles.
description: 8 pp
Le metamorfosi di un filosofo. Tracce, presenze e mutazioni di Aristotele nella zoologia di Plinio
Creators: name: Li Causi, Pietro
Publisher: name: Annali Online  Lettere - Ferrara
Year: 2012

description: In the zoological section of Natural History by Pliny the Elder,  the name of Aristotle is generally used as a "chrism", which helps to  determine the veracity of biological news and data that can also be seen  as fabulous or paradoxical. Anyway, whereas, e.g., the paradoxographers  never question Aristotle's auctoritas, sometimes Pliny - even though he never denies that the Greek philosopher is summus in omni doctrina vir (NH VIII 44) - shows hesitation in endorsing some of his positions. That is a way to give his historia the same level of auctoritas that Aristotle's physiké historie has, thus constructing a strong aura of "credibility" for his work.
description: Annali Online  Lettere - Ferrara, IV 2 (2009)
Ruth Leiserowitz u.a. (Hrsg.), Lesestunde / Lekcja czytania
Creators: name: Surman, Jan
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 2015

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 64 Nr. 1 (2015)
Una lezione al professore o una lezione  dal professore?
Creators: name: Longoni, Franco
Publisher: name: Annali Online  Lettere - Ferrara
Year: 2013

description: The exhibition Cranach: a Different Renaissance drew the attention on a masterpiece where the famous story of Aristotle and Phyllis is pictured, a legend born in the great stream of Alexander’s life history, a narrative stream running in the underground of European culture from the classical period to emerge here and there in different places and different times under different forms, to be interpreted time by time through different keys under the philosophical, anthropological, literary, artistic, psychological profile: from the medieval poem of Henri d’Andeli The Lay of Aristote, to the mythic film The Blue Angel based on the also famous book of Heinrich Mann Professor Unrat, the fatidic professor waiting at the door of the only woman who could give him a lesson, passing through a lot of similar cases as the one illustrated by the notorious photograph picturing Nietzsche Beyond Good and Evil subjugated together with Paul Rée by Lou Andreas-Salomé.
description: Annali Online  Lettere - Ferrara, VII 2 (2012)
Evolution of the proton sd states in neutron-rich Ca isotopes
Creators: name: Grasso, M.
name: Ma, Z. Y.
name: Khan, E.
name: Margueron, J.
name: Van Giai, N.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We analyze the evolution with increasing isospin asymmetry of the proton single-particle states 2s1/2 and 1d3/2 in Ca isotopes, using non-relativistic and relativistic mean field approaches. Both models give similar trends and it is shown that this evolution is sensitive to the neutron shell structure, the two states becoming more or less close depending on the neutron orbitals which are filled. In the regions where the states get closer some parametrizations predict an inversion between them. This inversion occurs near $^{48}$Ca as well as very far from stability where the two states systematically cross each other if the drip line predicted in the model is located far enough. We study in detail the modification of the two single-particle energies by using the equivalent potential in the Schroedinger-like Skyrme-Hartree-Fock equations. The role played by central, kinetic and spin-orbit contributions is discussed. We finally show that the effect of a tensor component in the effective interaction considerably favors the inversion of the two proton states in $^{48}$Ca.
description: 7 figures
Pterobius Maruyama 2010, gen. n.
Creators: name: Maruyama, Munetoshi
Publisher: name: Zenodo
Year: 2010
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Aphodiidae
Pterobius

description: Pterobius Maruyama, gen. n. urn:lsid:zoobank.org:act: A3912CE4-BFFE-4177-9FA1-A80C1C29EEFD
description: Published as part of Maruyama, Munetoshi, 2010, A new genus and species of myrmecophilous aphodiine beetle (Coleoptera, Scarabaeidae) inhabiting the myrmecophytic epiphyte Platycerium sp. (Polypodiaceae) in the Bornean rainforest canopy, pp. 49-54 in ZooKeys 34 (34) on page 50, DOI: 10.3897/zookeys.34.281, http://zenodo.org/record/576604
Oxygen pumping II: Probing the Inhomogeneous Metal Enrichment at the Epoch of Reionization with High Frequency CMB Observations
Creators: name: Hernandez-Monteagudo, Carlos
name: Haiman, Zoltan
name: Verde, Licia
name: Jimenez, Raul
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: At the epoch of reionization, when the high-redshift inter-galactic medium (IGM) is being enriched with metals, the 63.2 micron fine structure line of OI is pumped by the ~ 1300 AA soft UV background and introduces a spectral distortion in the Cosmic Microwave Background (CMB). Here we use a toy model for the spatial distribution of neutral oxygen, assuming metal bubbles surround dark matter halos, and compute the fluctuations of this distortion, and the angular power spectrum it imprints on the CMB. We discuss the dependence of the power spectrum on the velocity of the winds polluting the IGM with metals, the minimum mass of the halos producing these winds, and on the cosmic epoch when the OI pumping occurs. We find that, although the clustering signal of the CMB distortion is weak δy_{rms} ~ 10^{-7} (roughly corresponding to a temperature anisotropy of few nK), it may be reachable in deep integrations with high-sensitivity infrared detectors. Even without a detection, these instruments should be able to useful constraints on the heavy element enrichment history of the IGM.
description: Accepted for publication to ApJ
Hans-Jürgen Bömelburg u.a. (Hrsg.), Die Teilungen Polen-Litauens. Inklusions- und Exklusionsmechanismen – Traditionsbildung – Vergleichsebenen
Creators: name: Augustynowicz, Christoph
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 2015

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 64 Nr. 1 (2015)
Dynamical symmetries of the Klein-Gordon equation
Creators: name: Zhang, Fu-Lin
name: Chen, Jing-Ling
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The dynamical symmetries of the two-dimensional Klein-Gordon equations with equal scalar and vector potentials (ESVP) are studied. The dynamical symmetries are considered in the plane and the sphere respectively. The generators of the SO(3) group corresponding to the Coulomb potential, and the SU(2) group corresponding to the harmonic oscillator potential are derived. Moreover, the generators in the sphere construct the Higgs algebra. With the help of the Casimir operators, the energy levels of the Klein-Gordon systems are yielded naturally.
description: 4 p
A preliminary examination of the no arbitrage property in the Canadian security market
Creators: name: Hung, Reynold
Publisher: name: University of British Columbia
Year: 2010

description: This paper examines the empirical implications of the no arbitrage property using the Canadian common stock security market. In addition, an alternative security risk measure to the market "beta" is introduced and tested. The model for testing is derived from the state preference model which states that there exists a set of positive primitive security prices which is consistent with the observed set of complex security prices. A set of market kernels is estimated from the Canadian common stock data on which the testing of the no arbitrage property is based. The empirical evidence strongly suggests that there is a difference in market condition between the U.S. and Canada, and the no arbitrage property should not be rejected in Canada. Furthermore, the usefulness of the alternative security risk measure cannot be established based on the results of this paper.
Photoproduction of single inclusive jets at future ep colliders in next-to-leading order QCD
Creators: name: Jager, B.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: A next-to-leading order QCD calculation for single-inclusive jet photoproduction in unpolarized and longitudinally polarized lepton-hadron collisions is presented which consistently includes ``direct'' and ``resolved'' photon contributions. The computation is performed within the ``small-cone approximation'' in a largely analytical form. Phenomenological aspects of jet production at future ep colliders such as the CERN-LHeC and the polarized BNL-eRHIC are discussed, placing particular emphasis on the perturbative stability of the predictions and the possibility to constrain the parton content of the photon.
description: 17 pages, 8 figures
Alternative experimental evidence for chiral restoration in excited baryons
Creators: name: Glozman, L. Ya.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: Nuclear Experiment (nucl-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Given existing empirical spectral patterns of excited hadrons it has been suggested that chiral symmetry is approximately restored in excited hadrons at zero temperature/density (effective symmetry restoration). If correct, this implies that mass generation mechanisms and physics in excited hadrons is very different as compared to the lowest states. One needs an alternative and independent experimental information to confirm this conjecture. Using very general chiral symmetry arguments it is shown that strict chiral restoration in a given excited nucleon forbids its decay into the N πchannel. Hence those excited nucleons which are assumed from the spectroscopic patterns to be in approximate chiral multiplets must only "weakly" decay into the N πchannel, (f_{N^*Nπ}/f_{NNπ})^2 << 1. However, those baryons which have no chiral partner must decay strongly with a decay constant comparable with f_{NNπ}. Decay constants can be extracted from the existing decay widths and branching ratios. It turnes out that for all those well established excited nucleons which can be classified into chiral doublets N_+(1440) - N_-(1535), N_+(1710) - N_-(1650), N_+(1720) - N_-(1700), N_+(1680) - N_-(1675), N_+(2220) - N_-(2250), N_+(?) - N_-(2190), N_+(?) - N_-(2600), the ratio is (f_{N^*Nπ}/f_{NNπ})^2 ~ 0.1 or much smaller for the high-spin states. In contrast, the only well established excited nucleon for which the chiral partner cannot be identified from the spectroscopic data, N(1520), has a decay constant into the Nπchannel that is comparable with f_{NNπ}. This gives an independent experimental verification of the chiral symmetry restoration scenario.
description: 4 pp. A new footnote with an alternative proof of impossibility of parity doublet decay into pi + N is added. To appear in Phys. Rev. Lett
Modern Curricula in African Library Schools: Setting the Agenda for Sustainable Development
Creators: name: Onifade, Abdurrahman Bello
name: Alex-Nmecha, Juliet C.
Publisher: name: AfLIA
Year: 2023
Subjects: classificationCode: 461006
subject: Library studies

description: Education systems and institutions are established to produce graduates that are equipped with skills to provide solutions to societal challenges and advance human development. To achieve this, among other goals, these systems and institutions are expected to run based on curricula that reflect global realities and community needs. There has been advocacy for modern curricula adoption and integration into the programmes run in African library schools, to ensure librarians and information professionals are trained adequately and prepared to meet global standards in the provision of information services and actively involved in the promotion of the sustainable development goals (SDGs). However, the extent of the willingness and readiness to revise and implement modern curricula in African library schools is still characterised by uncertainty. What are the new areas to be incorporated? Are the areas in line with SDGs and prepare LIS graduands for sustainable development? Do the library schools have the manpower/skilled personnel for the implementation of modern curricula? Building on this background, this study sought to highlight the phenomenon and investigate the state of adoption of modern curricula in African library schools with a view to set agenda for sustainable development. The study adopted a survey research design of quantitative methodology. Using an electronic questionnaire designed with Google Forms, data were collected from the staff of library schools in the five regions in Africa. The data collected are presented in piece charts and discussed with descriptive analysis. The study discovered that information literacy is the topmost area identified to pursue sustainable development and lack of funds, and lack of computing tools and technological facilities as the major challenges hindering the adoption and incorporation of a modern curricula system in African library schools. It was recommended that practical steps be taken by AfLIA towards the unification of LIS schools in the continent, through a reliable database system and periodic meetings to deliberate strategic mechanisms to have a working, modern curricula system that embraces and prepares LIS professionals that can engender sustainable development.
Analytic treatment of CRIB Quantum Memories for Light using Two-level Atoms
Creators: name: Longdell, J. J.
name: Hétet, G.
name: Sellars, M. J.
name: Lam, P. K.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: It has recently been discovered that the optical analogue of a gradient echo in an optically thick material could form the basis of a optical memory that is both completely efficient and noise free. Here we present analytical calculation showing this is the case. There is close analogy between the operation of the memory and an optical system with two beam splitters. We can use this analogy to calculate efficiencies as a function of optical depth for a number of quantum memory schemes based on controlled inhomogeneous broadening. In particular we show that multiple switching leads to a net 100% retrieval efficiency for the optical gradient echo even in the optically thin case.
description: 10 pages
Detailed analysis of the poorly studied northern open cluster NGC 1348 using multi-color photometry and GAIA EDR3 astrometry
Creators: name: Bisht, D.
name: Zhu, Qingfeng
name: Elsanhoury, W. H.
name: Sariya, Devesh P.
name: Rangwal, Geeta
name: Yadav, R. K. S.
name: Durgapal, Alok
name: Jiang, Ing-Guey
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The membership determination for open clusters in noisy environments of the Milky Way is still an open problem. In this paper, our main aim is provide the membership probability of stars using proper motions and parallax values of stars using Gaia EDR3 astrometry. Apart from the Gaia astrometry, we have also used other photometric data sets like UKIDSS, WISE, APASS and Pan-STARRS1 in order to understand cluster properties from optical to mid-infrared regions. We selected 438 likely members with membership probability higher than $50\%$ and G$\le$20 mag. We obtained the mean value of proper motion as $μ_{x}=1.27\pm0.001$ and $μ_{y}=-0.73\pm0.002$ mas yr$^{-1}$. The cluster's radius is determined as 7.5 arcmin (5.67 pc) using radial density profile. Our analysis suggests that NGC 1348 is located at a distance of $2.6\pm0.05$ kpc. The mass function slope is found to be $1.30\pm0.18$ in the mass range 1.0$-$4.1 $M_\odot$, which is in fair agreement with Salpeter's value within the 1$σ$ uncertainty. The present study validates that NGC 1348 is a dynamically relaxed cluster. We computed the apex coordinates $(A, D)$ for NGC 1348 as $(A_\circ, D_\circ)$ = $(-23^{\textrm{o}}.815\pm 0^{\textrm{o}}.135$, $-22^{\textrm{o}}.228\pm 0^{\textrm{o}}.105)$. In addition, calculations of the velocity ellipsoid parameters (VEPs), matrix elements $μ_{ij}$, direction cosines ($l_j$, $m_j$, $n_j$) and the Galactic longitude of the vertex have been also conducted in this analysis.
description: 14 Figures, 4 Tables, Accepted for publication by the Publication of the Astronomical Society of Japan (PASJ)
Unofficial Trade and Business Practices in the Baltic Sea Region in the Twentieth Century
Creators: name: Blusiewicz, Tomasz
name: Stöcker, Lars Fredrik
name: Mitter, Adrian
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 2019

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 68 Nr. 4 (2019):
Urszula Kosińska, August II w poszukiwaniu sojusznika. Między aliansem wiedeńskim i hanowerskim (1725-1730)
Creators: name: Kordel, Jacek
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 2015

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 64 Nr. 1 (2015)
Improved approximation algorithms for bounded-degree local Hamiltonians
Creators: name: Anshu, Anurag
name: Gosset, David
name: Korol, Karen J. Morenz
name: Soleimanifar, Mehdi
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Computational Complexity (cs.CC)
subject: Data Structures and Algorithms (cs.DS)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: We consider the task of approximating the ground state energy of two-local quantum Hamiltonians on bounded-degree graphs. Most existing algorithms optimize the energy over the set of product states. Here we describe a family of shallow quantum circuits that can be used to improve the approximation ratio achieved by a given product state. The algorithm takes as input an $n$-qubit product state $|v\rangle$ with mean energy $e_0=\langle v|H|v\rangle$ and variance $\mathrm{Var}=\langle v|(H-e_0)^2|v\rangle$, and outputs a state with an energy that is lower than $e_0$ by an amount proportional to $\mathrm{Var}^2/n$. In a typical case, we have $\mathrm{Var}=Ω(n)$ and the energy improvement is proportional to the number of edges in the graph. When applied to an initial random product state, we recover and generalize the performance guarantees of known algorithms for bounded-occurrence classical constraint satisfaction problems. We extend our results to $k$-local Hamiltonians and entangled initial states.
The Cosmological Constant is Probably Zero, and a Proof is Possibly Right
Creators: name: Wu, Zhong Chao
Publisher: name: arXiv
Year: 2007
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Hawking proposed that the cosmological constant is probably zero in quantum cosmology. Duff claimed that Hawking's proof is invalidated. Using the right configuration for the wave function of the universe, we provide a complete proof.
description: 6 pages, modified version
Iterative construction of $U_q (s\ell (n+1)) $ representations and Lax matrix factorisation
Creators: name: Derkachov, S.
name: Karakhanyan, D.
name: Kirschner, R.
name: Valinevich, P.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Quantum Algebra (math.QA)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: The construction of a generic representation of $g\ell(n+1)$ or of the trigonomentric deformation of its enveloping algebra known as algebraic induction is conveniently formulated in term of Lax matrices. The Lax matrix of the constructed representation factorises into parts determined by the Lax matrix of a generic representation of the algebra with reduced rank and others appearing in the factorised expression of the Lax matrix of the special Jordan-Schwinger representation.
description: 18 pages, references added
Single-qubit operations in the double-donor structure driven by optical and voltage pulses
Creators: name: Tsukanov, Alexander V.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We study theoretically the quantum dynamics of an electron in the singlyionized double-donor structure in the semiconductor host under the influence of laser pulses whose frequencies are close to structure resonant frequencies. This system can be used as a charge qubit where the logical states are defined by the lowest two energy states of the remaining valence electron localized around one or another donor. The quantum operations are performed via resonant or Raman-like transitions between the localized (qubit) states and the excited states delocalized over the structure, combined with phase shifts between qubit states generated by voltage pulses. The possibility of realization of arbitrary single-qubit rotations is demonstrated.
description: to appear in Phys. Rev. B
Agnieszka Jagodzińska (Hrsg.), W poszukiwaniu religii doskonałej? Konwersja a Żydzi
Creators: name: Kalinowska-Wójcik, Barbara
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 2015

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 64 Nr. 1 (2015)
Solvable Two-Body Dirac Equation as a Potential Model of Light Mesons
Creators: name: Duviryak, Askold
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: The two-body Dirac equation with general local potential is reduced to the pair of ordinary second-order differential equations for radial components of a wave function. The class of linear + Coulomb potentials with complicated spin-angular structure is found, for which the equation is exactly solvable. On this ground a relativistic potential model of light mesons is constructed and the mass spectrum is calculated. It is compared with experimental data.
description: This is a contribution to the Proc. of the Seventh International Conference ''Symmetry in Nonlinear Mathematical Physics'' (June 24-30, 2007, Kyiv, Ukraine), published in SIGMA (Symmetry, Integrability and Geometry: Methods and Applications) at http://www.emis.de/journals/SIGMA/