cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The large-scale magnetic field of Proxima Centauri near activity maximum
Creators: name: Klein, Baptiste
name: Donati, Jean-François
name: Hébrard, Élodie M.
name: Zaire, Bonnie
name: Folsom, Colin P.
name: Morin, Julien
name: Delfosse, Xavier
name: Bonfils, Xavier
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We report the detection of a large-scale magnetic field at the surface of the slowly-rotating fully-convective M dwarf Proxima Centauri. Ten circular polarization spectra, collected from April to July 2017 with the HARPS-Pol spectropolarimeter, exhibit rotationally-modulated Zeeman signatures suggesting a stellar rotation period of $89.8 \pm 4.0$ d. Using Zeeman-Doppler Imaging, we invert the circular polarization spectra into a surface distribution of the large-scale magnetic field. We find that Proxima Cen hosts a large-scale magnetic field of typical strength 200 G, whose topology is mainly poloidal, and moderately axisymmetric, featuring, in particular, a dipole component of 135 G tilted at 51$^{\circ}$ to the rotation axis. The large-scale magnetic flux is roughly 3 times smaller than the flux measured from the Zeeman broadening of unpolarized lines, which suggests that the underlying dynamo is efficient at generating a magnetic field at the largest spatial scales. Our observations occur $\sim$1 yr after the maximum of the reported 7 yr-activity cycle of Proxima Cen, which opens the door for the first long-term study of how the large-scale field evolves with the magnetic cycle in a fully-convective very-low-mass star. Finally, we find that Proxima Cen's habitable zone planet, Proxima-b, is likely orbiting outside the Alfvèn surface, where no direct magnetic star-planet interactions occur.
description: 7 pages, 5 figures, accepted to MNRAS
GRB990123: multiwavelength afterglow study
Creators: name: Maiorano, E.
name: Masetti, N.
name: Palazzi, E.
name: Frontera, F.
name: Grandi, P.
name: Pian, E.
name: Amati, L.
name: Nicastro, L.
name: Soffitta, P.
name: Corsi, A.
name: Piro, L.
name: Antonelli, L. A.
name: Costa, E.
name: Feroci, M.
name: Heise, J.
name: Zand, J. J. M. in 't
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report on the BeppoSAX and multiwavelength data analysis of the afterglow of Gamma-Ray Burst (GRB) 990123. Mainly due to its exceptional brightness, this is the only source for which the Wide Field Cameras have allowed an early detection of the X-ray afterglow between about 20 and 60 min after the GRB trigger. Besides, again for the first time, high-energy emission from the afterglow was detected up to 60 keV. The backwards extrapolation of the afterglow decay smoothly reconnects with the late GRB emission, thus indicating that both are consistent with being produced by the same phenomenon. For the X-ray afterglow we found a power-law decay with index alpha_X = 1.46 +/- 0.04; the spectrum has a power-law shape with photon index Gamma about 2. An extensive set of multiwavelength observations on the afterglow, collected from the literature and made during the BeppoSAX pointing, allowed constructing a Spectral Flux Distribution. We performed an analysis of the GRB afterglow emission in the context of the "fireball" model.
description: 4 pages, 2 figures, 1 table. Poster presented at the 4th Workshop Gamma-Ray Bursts in the Afterglow Era, Rome,18-22 October 2004. Editors: L. Piro, L. Amati, S. Covino, and B. Gendre. Il Nuovo Cimento, in press
Discovery of new Milky Way star cluster candidates in the 2MASS point source catalog III. Follow-up observations of cluster candidates in the Galactic Center region
Creators: name: Borissova, J.
name: Ivanov, V. D.
name: Minniti, D.
name: Geisler, D.
name: Stephens, A. W.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: This paper is part of a project to search the inner Milky Way for hidden massive clusters and to address the question of whether our Galaxy still forms clusters similar to the progenitors of the present-day globular clusters. We report high angular resolution deep near-infrared imaging of 21 cluster candidates selected from the catalogues of Bica et al. (2003) and Dutra et al.(2003) in a region around the Galactic Center. These catalogues were created from visual inspection of the 2MASS images. Seven objects appear to be genuine clusters, and for these objects we present estimates of extinction, distance and in some cases age and mass. Our estimated masses range from 1200 to 5500 solar masses. These clusters are thus significantly smaller than any Galactic globular cluster, and indicate that the formation of massive young clusters such as Arches and Quintuplet is not common in the present-day Milky Way. The remaining 14 objects are either not clusters or cannot be classified based on our data.
description: 8 pages, 19 figures, accepted for publication in A&A
Current-driven domain wall dynamics in ferrimagnetic Ni-doped Mn4N films : very large domain wall velocities and reversal of motion direction across the magnetic compensation point
Creators: name: Ghosh, Sambit
name: Komori, Taro
name: Hallal, Ali
name: Garcia, Jose Peña
name: Gushi, Toshiki
name: Hirose, Taku
name: Mitarai, Haruka
name: Okuno, Hanako
name: Vogel, Jan
name: Chshiev, Mairbek
name: Attané, Jean-Philippe
name: Vila, Laurent
name: Suemasu, Takashi
name: Pizzini, Stefania
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: Spin-transfer torque (STT) and spin-orbit torque (SOT) are spintronic phenomena allowing magnetization manipulation using electrical currents. Beyond their fundamental interest, they allow developing new classes of magnetic memories and logic devices, in particular based on domain wall (DW) motion. In this work, we report the study of STT driven DW motion in ferrimagnetic manganese nickel nitride (Mn4-xNixN) films, in which a fine adjustment of the Ni content allows setting the magnetic compensation at room temperature. The reduced magnetization, combined with the large spin polarization of conduction electrons, strongly enhances the STT so that domain wall velocities approaching 3000 m/s can be obtained for Ni compositions close to the compensation point. In addition, a reversal of the domain wall motion direction is observed when the magnetic compensation composition is crossed. This striking feature, related to the change of direction of the spin polarization with respect to that of the net magnetization, is clarified by ab initio band structure calculations.
description: 24 pages, 4 figures
Der konziliare Prozeß - bleibende Verpflichtung im Wandel
Creators: name: Falcke, Heino
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 43 Nr. 4 (1994): Ökumenische Rundschau, Band 43, Heft 4
title: Entwicklung und Pilotierung einer Decision-Coaching-Intervention zur Unterstützung einer informierten Entscheidungsfindung bezüglich der Schutzimpfung gegen COVID-19: Studienprotokoll
title: Development and piloting of a decision coaching intervention to support informed decision-making about vaccination against COVID-19: study protocol
titleType: AlternativeTitle
Creators: name: Kaden, Jana
name: Rahn, Anne
name: Berger-Höger, Birte
Publisher: name: Universität Bremen
Year: 2021
Subjects: subject: Decision Coaching
subject: informierte Entscheidung
subject: Impfmüdigkeit
subject: Decision coaching
subject: informed choice
subject: vaccine hesitancy
subject: 610

description: Aus Public-Health Perspektive besteht das Interesse eine möglichst hohe Impfquote gegen COVID-19 von Erwachsenen zu erreichen. Es zeichnet sich ab, dass es großer Anstrengungen bedarf, diese Quote zu erreichen. In Deutschland besteht derzeit keine Impfpflicht. Bürger*innen haben ein Recht auf eine individuelle und informierte Entscheidung hinsichtlich der Schutzimpfung gegen COVID-19. Eine informierte Entscheidung liegt dann vor, wenn die Entscheidung von den Betroffenen basierend auf ausreichendem Wissen über die Handlungsalternativen und im Einklang mit ihren persönlichen Präferenzen getroffen wird. Ziel des Forschungsprojektes ist die Entwicklung einer komplexen Intervention bestehend aus einem nicht-direktiven Decision Coaching durch geschulte Gesundheitsfachpersonen. Bürger*innen werden ermutigt und unterstützt, evidenzbasierte Gesundheitsinformationen im Prozess der Entscheidungsfindung zu nutzen und diese zu verstehen. Dabei haben sie die Möglichkeit, eigene Werte und Präferenzen hinsichtlich der Optionen sowie zu erwartenden Ergebnissen zu klären. Durch die Coaching-Intervention soll verschiedenen Gruppen (z. B. Jugendliche, vulnerable Gruppen, Gesundheitsfachpersonen) eine informierte Entscheidungsfindung bezüglich der Schutzimpfung gegen COVID-19 ermöglicht werden. Im Vorfeld erhalten die Gesundheitsfachpersonen eine Schulung. Die Intervention wird in Anlehnung an das MRC-Framework zur Entwicklung und Evaluation komplexer Interventionen in einem iterativen Prozess entwickelt und pilotiert (Phase 1 und 2-Studie).
On the naturality of the Mathai-Quillen formula
Creators: name: Lakos, Gyula
Publisher: name: arXiv
Year: 2006
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 58A10 (primary), 53C05, 57R20 (secondary)

description: We give an alternative proof for the Mathai-Quillen formula for a Thom form using its natural behaviour with respect to fiberwise integration. We also study this phenomenon in general context.
description: 6 pages
Salvaging the waterfront: the evolution of an existing infrastructure on Vancouver’s central waterfront
Creators: name: Jones, Michaela Margaret
Publisher: name: University of British Columbia
Year: 2009

description: The thesis project reconstructs the relations between conflicting social groups through the exchange of goods and ideas in Portside Park. The project also explores how the evolution of an infrastructure is capable of criticizing the original conditions of its construction. This is completed through the design of a series of possible future events such as a pedestrian overpass, and public market in Portside Park on Vancouver's central waterfront. Robert Thayer Jr. and Bill Morrish were influential in exploring how we understand the landscape and the importance of visual ecology which expresses an ecology behind a site. A collective identity can be influenced by such ideas, and if given a place of importance, can also act as forums, adding more than just physical boundaries to the city. The project is sighted on the waterfront, a landscape that currently lies dormant and in a state of transition. The requirements for site selection were that the site must have the potential for an evolution of its own with hidden or unused elements that may be renewed and adapted to enrich the expression of the site. The starting point for the project was to speculate on a series of future events that respond to possible social and political forces affecting the site. The matrix was a method of determining the potential of the site. The moment that is detailed, for the purposes of this project, is the year 2020. At this time, the coil, a pedestrian overpass, responds to the permanence of the city through its 'building as wall' vocabulary. The wall is then transformed into a connection from the city to the park. The market shields the rail and opens up to the park. Here the boundary between the connector and enclosure has been inverted and the visitor is inserted into the market building. The visitor is released into the park in the company of others within a defined realm, shielded by a canopy of trees. The final place for quiet contemplation is the beach which remains open and exposed - the most valued and protected part of the park. Valued not for is aesthetic achievements but for its political and social meaning. The pedestrian embarks on a journey. Leaving the dense built environment of the city, the pedestrian ascends the public walkway over the tracks and gradually enters the transition of the bosk, where the mounds and trees enclose the body yet prepare him for the open water. In conclusion the project attempts to accommodate a place for the individual and the collective, it defines a place for establishing a coexistence.
Efficiency corrections for factorial moments and cumulants of overlapping sets of particles
Creators: name: Vovchenko, Volodymyr
name: Koch, Volker
Publisher: name: arXiv
Year: 2021
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: In this note we discuss subtleties associated with the efficiency corrections for measurements of off-diagonal cumulants and factorial moments for a situation when one deals with overlapping sets of particles, such as correlations between numbers of protons and positively charged particles. In particular, we discuss the situation commonly encountered in heavy-ion experiments, where first all charges are reconstructed and then protons are selected from these charges by an additional particle identification procedure. We present the efficiency correction formulas for the case when the detection efficiencies follow a binomial distribution.
description: 13 pages, 1 figure, to appear in Nucl. Phys. A
'Co' na świecie, 'Covid' w Europie i Ameryce?
Creators: name: Rafał Pązik
Publisher: name: Zenodo
Year: 2021
Subjects: Covid-19, pandemia, SARS-cov2, world, statistics

description: Covid-19 na "świecie". Zestawienie różnych statystyk z wykresami i tabelami- aktualizaja na 28 Luty 2021.
Surface effects in color superconducting strange-quark matter
Creators: name: Oertel, Micaela
name: Urban, Michael
Publisher: name: arXiv
Year: 2008
Subjects: subject: Nuclear Theory (nucl-th)
subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Surface effects in strange-quark matter play an important role for certain observables which have been proposed in order to identify strange stars, and color superconductivity can strongly modify these effects. We study the surface of color superconducting strange-quark matter by solving the Hartree-Fock-Bogoliubov equations for finite systems ("strangelets") within the MIT bag model, supplemented with a pairing interaction. Due to the bag-model boundary condition, the strange-quark density is suppressed at the surface. This leads to a positive surface charge, concentrated in a layer of ~1 fm below the surface, even in the color-flavor locked (CFL) phase. However, since in the CFL phase all quarks are paired, this positive charge is compensated by a negative charge, which turns out to be situated in a layer of a few tens of fm below the surface, and the total charge of CFL strangelets is zero. We also study the surface and curvature contributions to the total energy. Due to the strong pairing, the energy as a function of the mass number is very well reproduced by a liquid-drop type formula with curvature term.
description: 13 pages, v2: more detailed explanations, discussion added
Pair of associated Schouten-van Kampen connections adapted to an almost paracontact almost paracomplex Riemannian structure
Creators: name: Manev, Hristo
name: Manev, Mancho
Publisher: name: arXiv
Year: 2020
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 53C25, 53C07, 53C50, 53D15

description: There are introduced and studied a pair of associated Schouten-van Kampen affine connections adapted to the paracontact distribution and an almost paracontact almost paracomplex Riemannian structure generated by the pair of associated metrics and their Levi-Civita connections. By means of the constructed non-symmetric connections, the basic classes of the manifolds with the considered structure are characterized. Curvature properties of the studied connections are obtained. A family of examples on a Lie group is constructed.
description: 13 pages. arXiv admin note: text overlap with arXiv:1504.05330, arXiv:1706.05505
FEASIBILITY ANALYSIS OF SUSTAINABLE DECENTRALIZED MODELFOR SOLID WASTE MANAGEMENT IN PABNA
Creators: name: HASAN, MOHAMMAD RAQUIBUL
name: Jahan, Md. Sarwer
name: Rahamatullah, Md.
name: Ali, Yasin
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 400599
subject: Civil engineering not elsewhere classified

description: Pabna, a city in Bangladesh, generates approximately 48 tons of municipal solid waste per day. Most of them are dumped without any treatment in a nearby dustbin, which is ultimately polluting the environment. This study aims to assess the practicability of decentralized solid waste management (DSWM) by community participation to grasp things regarding the segregation, storage, and assortment of family waste, the data of the residents, and their willingness to interact in DSWM. A stratified random sample, comprising 400 respondents, was selected for a questionnaire survey in different wards of Pabna municipality. Survey results indicate that only 20% of residents segregate solid waste at home. Among them, 56% of residents sold their waste, including plastics, newspapers, glasses, old clothes, etc., to the scrap market or street hawker. This research revealed that males had higher general knowledge than females about the decentralized process, and higher educated peoples in different age groups are more concerned about the DSWM system. Depending on the survey results, this study suggested a cost-effective analysis for the development of a box composting plant to facilitate the DSWM in the selected study area.
High-speed, multi-colour optical photometry of the anomalous X-ray pulsar 4U 0142+61 with ULTRACAM
Creators: name: Dhillon, V. S.
name: Marsh, T. R.
name: Hulleman, F.
name: van Kerkwijk, M. H.
name: Shearer, A.
name: Littlefair, S. P.
name: Gavriil, F. P.
name: Kaspi, V. M.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present high-speed, multi-colour optical photometry of the anomalous X-ray pulsar 4U 0142+61, obtained with ULTRACAM on the 4.2-m William Herschel Telescope. We detect 4U 0142+61 at magnitudes of i'=23.7+-0.1, g'=27.2+-0.2 and u'>25.8, consistent with the magnitudes found by Hulleman et al.(2004) and hence confirming their discovery of both a spectral break in the optical and a lack of long-term optical variability. We also confirm the discovery of Kern & Martin (2002) that 4U 0142+61 shows optical pulsations with an identical period (~8.7 s) to the X-ray pulsations. The rms pulsed fraction in our data is 29+-8%, 5-7 times greater than the 0.2-8 keV X-ray rms pulsed fraction. The optical and X-ray pulse profiles show similar morphologies and appear to be approximately in phase with each other, the former lagging the latter by only 0.04+-0.02 cycles. In conjunction with the constraints imposed by X-ray observations, the results presented here favour a magnetar interpretation for the anomalous X-ray pulsars.
description: 6 pages, 4 figures, accepted for publication in MNRAS
Noncommutative Solitons
Creators: name: Lechtenfeld, Olaf
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: These lectures deal mainly with solitons in three-dimensional Moyal-deformed sigma models. The topics are: static and moving (multi-)solitons of the (integrable) Ward sigma model, with space-space and time-space noncommutativity, their scattering, moduli space dynamics, stability and dimensional reduction, including an integrable deformation of the sine-Gordon system.
description: 150 minutes of lectures given 01-04 November 2005 at the International Workshop on Noncommutative Geometry and Physics in Sendai, Japan
Infrared problem vs gauge choice: scattering of classical Dirac field
Creators: name: Herdegen, Andrzej
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences
subject: 81U99, 81V10

description: We consider the Dirac equation for the classical spinor field placed in an external, time-dependent electromagnetic field of the form typical for scattering settings: $F=F^\mathrm{ret}+F^\mathrm{in}=F^\mathrm{adv}+F^\mathrm{out}$, where the current producing $F^{\mathrm{ret}/\mathrm{adv}}$ has past and future asymptotes homogeneous of degree $-3$, and the free fields $F^{\mathrm{in}/\mathrm{out}}$ are radiation fields produced by currents with similar asymptotic behavior. We show the existence of the electromagnetic gauges in which the particle has 'in' and 'out' asymptotic states approaching free field states, with no long-time corrections of the free dynamics. Using a special Cauchy foliation of the spacetime we show in this context the existence and asymptotic completeness of the wave operators. Moreover, we define a special 'evolution picture' in which the free evolution operator has well-defined limits for $t\to\pm\infty$, thus the scattering wave operators do not need the free evolution counteraction.
description: 57 pages
The Impact of Soaking Time for Extracting Neem Leaves on the Pest of Local Chili Plants
Creators: name: Azmi Ahmad
Publisher: name: Zenodo
Year: 2024

description: Neem is an exceptional plant from Indian region, perceived today as a characteristic plant which can be utilized in numerous fields, for example, agriculture and human health. Researchers are presently concentrating on the significance of neem in the horticultural field. This tree and its many dynamic functions are utilized to make various things. Common properties of neem don't have any poisonous responses. One of the neem wide uses is as characteristic pesticide which extracted from the leaves. The experiment was run to investigate the effectiveness of neem leaves extraction as a potential natural pesticides against pest such as crickets on the chili plants. The parameter conducted is soaking duration of neem leaves against the number of crickets left after the spray of neem leaves extraction is applied.
Numerical analysis of high-index nanocomposite encapsulant for light-emitting diodes
Creators: name: Ju, Young-Gu
name: Almuneau, Guilhem
name: Kim, Tae-Hoon
name: Lee, Baek-Woon
Publisher: name: arXiv
Year: 2005
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We used two-dimensional Finte-Difference-Time-Domain (FDTD) software to study the transition behavior of nano-particles from scatterers to an optically uniform medium. We measured the transmission efficiency of the dipole source, which is located in the high refractive index medium(index=2.00) and encapsulated by low index resin(index=1.41). In an effort to compose index-matched resin and to reduce internal reflection, high-index nano-particles are added to low-index resin in simulations of various sizes and densities. As the size of the nano-particles and the average spacing between particles are reduced to 0.02 lambda and 0.07 lambda respectively, the transmission efficiency improves two-fold compared to that without nanoparticles. The numerical results can be used to understand the optical behavior of nano-particles and to improve the extraction efficiency of high brightness light-emitting-diodes(LEDs), through the use of nano-composite encapsulant.
description: 9 pages, 5 jpg figures
Influence of annealing parameters on the ferromagnetic properties of optimally passivated (Ga,Mn)As epilayers
Creators: name: Stanciu, V.
name: Wilhelmsson, O.
name: Bexell, U.
name: Adell, M.
name: Sadowski, J.
name: Kanski, J.
name: Warnicke, P.
name: Svedlindh, P.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The influence of annealing parameters - temperature and time - on the magnetic properties of As-capped (Ga,Mn)As epitaxial thin films have been investigated. The dependence of the transition temperature (Tc) on annealing time marks out two regions. The Tc peak behavior, characteristic of the first region, is more pronounced for thick samples, while for the second (`saturated') region the effect of the annealing time is more pronounced for thin samples. A right choice of the passivation medium, growth conditions along with optimal annealing parameters routinely yield Tc-values of ~ 150 K and above, regardless of the thickness of the epilayers.
description: 5 pages, 3 figures
A Characterization of the Circumstellar Gas around WD 1124-293 using Cloudy
Creators: name: Steele, Amy
name: Debes, John
name: Xu, Siyi
name: Yeh, Sherry
name: Dufour, Patrick
Publisher: name: arXiv
Year: 2020
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Between 30 - 50% of white dwarfs (WDs) show heavy elements in their atmospheres. This "pollution" is thought to arise from the accretion of planetesimals perturbed by outer planet(s) to within the WD's tidal disruption radius. A small fraction of these WDs show either emission or absorption from circumstellar (C-S) gas. The abundances of metals in the photospheres of WDs with C-S gas are mostly similar to the bulk composition of the Earth. The C-S component arises from gas produced through collisions and/or the sublimation of disintegrating planetesimals. High resolution spectroscopic observations of WD 1124-293 reveal photospheric and C-S absorption of Ca in multiple transitions. Here, we present high signal-to-noise ratio spectra, an updated WD atmosphere analysis, and a self-consistent model of its C-S gas. We constrain the abundances of Ca, Mg, and Fe in the photosphere of WD 1124-293, and find agreement with the abundances of these 3 species in the C-S gas. We find the location of the C-S gas is about a hundred white dwarf radii, the C-S and photospheric compositions are thus far consistent, the gas is not isothermal, and the amount of C-S Ca has not changed in two decades. We also demonstrate how to use Cloudy to model C-S gas viewed in absorption around polluted WDs. Modeling the abundances of C-S gas around polluted WDs with Cloudy provides a new method to measure the composition of exo-planetesimals and will allow a direct comparison to the composition of rocky bodies in the Solar System.
description: Accepted for publication in The Astrophysical Journal, 13 pages, 9 figures, 4 tables
Coherent States in Geometric Quantization
Creators: name: Kirwin, William D.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Symplectic Geometry (math.SG)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 53D50, 32A36

description: In this paper we study overcomplete systems of coherent states associated to compact integral symplectic manifolds by geometric quantization. Our main goals are to give a systematic treatment of the construction of such systems and to collect some recent results. We begin by recalling the basic constructions of geometric quantization in both the Kahler and non-Kahler cases. We then study the reproducing kernels associated to the quantum Hilbert spaces and use them to define symplectic coherent states. The rest of the paper is dedicated to the properties of symplectic coherent states and the corresponding Berezin-Toeplitz quantization. Specifically, we study overcompleteness, symplectic analogues of the basic properties of Bargmann's weighted analytic function spaces, and the `maximally classical' behavior of symplectic coherent states. We also find explicit formulas for symplectic coherent states on compact Riemann surfaces.
description: 18 pages LaTeX; new version: some typos corrected, references added, recent results incorporated to improve statements and proofs (especially in section 5)
Using Multiple Subwords to Improve English-Esperanto Automated Literary Translation Quality
Creators: name: Poncelas, Alberto
name: Buts, Jan
name: Hadley, James
name: Way, Andy
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computation and Language (cs.CL)
subject: FOS: Computer and information sciences

description: Building Machine Translation (MT) systems for low-resource languages remains challenging. For many language pairs, parallel data are not widely available, and in such cases MT models do not achieve results comparable to those seen with high-resource languages. When data are scarce, it is of paramount importance to make optimal use of the limited material available. To that end, in this paper we propose employing the same parallel sentences multiple times, only changing the way the words are split each time. For this purpose we use several Byte Pair Encoding models, with various merge operations used in their configuration. In our experiments, we use this technique to expand the available data and improve an MT system involving a low-resource language pair, namely English-Esperanto. As an additional contribution, we made available a set of English-Esperanto parallel data in the literary domain.
Clinical characteristics of 8p inversion duplication and other 8p rearrangements
Creators: name: Jurenka, Stanislava B.
Publisher: name: University of British Columbia
Year: 2009

description: The main goal of the project reported in this thesis is to summarize the current knowledge of the 8p inversion duplication clinical features, to add observations of our own patients, and to correlate the resulting clinical definition with the new information on the molecular analysis of these cases. I present detailed clinical and cytogenetic findings of four patients with 8p inversion duplication, three of which were previously unreported. Two of these patients had an atypical inverted chromosome. In this atypical variant the center of symmetry was found to be more distal on the 8p arm of chromosome 8 so that the portion of 8p23.2 was duplicated in addition to more proximal bands. The report of our two patients is the first focused on this variant. The secondary goal of this thesis was to determine if these variants could be distinguished from the common form in order to add to our knowledge regarding the critical region responsible for the abnormal phenotype in this group of patients. After a detailed clinical comparison of the two types of 8p inversion duplication, I found that in one of the patients with the atypical variant, the physical features were not clearly different from the common type, although the developmental deficit was less marked. In the second patient with the atypical variant the developmental delay and dysmorphism were minimal. In this case the duplication was short, terminating in 8p21.3 band. This case might point to the more exact location of the critical region on 8p. A cosmid 153G8, containing repetitive sequences hybridizing to 4p and to 8p, was used as FISH probe in four cases of 8p inversion duplication. In cases A. and B., 153G8 hybridized to the center of symmetry at 8p23.1. In cases C. and D. with the center of symmetry at 8p(23.2), two FISH signals flanked the center of symmetry. This finding provides the evidence that that repetitive sequences are present in the 8p23.1 region, and that in the atypical variant, the center of symmetry is distal to 8p23.1.
Gauge fluctuations and transition temperature for superconducting wires
Creators: name: Malbouisson, A. P. C.
name: Milla, Y. W.
name: Roditi, I.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We consider the Ginzburg-Landau model, confined in an infinitely long rectangular wire of cross-section $L_{1}\times L_{2}$. Our approach is based on the Gaussian effective potential in the transverse unitarity gauge, which allows to treat gauge contributions in a compact form. The contributions from the scalar self-interaction and from the gauge fluctuations are clearly identified. Using techniques from dimensional and $zeta$-function regularizations, modified by the confinement conditions, we investigate the critical temperature for a wire of transverse dimensions $L_1$, $L_2$. Taking the mass term in the form $m_{0}^2=a(T/T_0 - 1)$, where $T_0$ is the bulk transition temperature, we obtain equations for the critical temperature as a function of the $L_{i}'s$ and of $T_{0}$, and determine the limiting sizes sustaining the transition. A qualitative comparison with some experimental observations is done.
description: 11 pages, 2 figures, to appear in Physica A
Pitfalls and solutions for perovskite transparent conductors
Creators: name: Si, Liang
name: Kaufmann, Josef
name: Tomczak, Jan M.
name: Zhong, Zhicheng
name: Held, Karsten
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Transparent conductors-nearly an oxymoron-are in pressing demand, as ultra-thin-film technologies become ubiquitous commodities. As current solutions rely on non-abundant elements, perovskites such as SrVO3 and SrNbO3 have been suggested as next generation transparent conductors. Our ab-initio calculations and analytical insights show, however, that reducing the plasma frequency below the visible spectrum by strong electronic correlations-a recently proposed strategy-unavoidably comes at a price: an enhanced scattering and thus a substantial optical absorption above the plasma edge. As a way out of this dilemma we identify several perovskite transparent conductors, relying on hole doping, somewhat larger bandwidths and separations to other bands.
Load-Balancing Reacting Multiphase Flows
Creators: name: Azizi, Victor
name: Fathi, Mohamad
name: van den Oord, Gijs
name: Hickel, Stefan
Publisher: name: Zenodo
Year: 2021

description: The ECN Spray-A is a benchmark case for the turbulent mixing of
 cold fuel jets with a hot high-pressure environment, and includes
 condensation, evaporations, and chemical reactions.
 Balancing the computational load caused by the spatially and
 temporally scattered multi-phase, chemically reacting regions is
 intractable with traditional mesh partitioning. To mitigate this
 problem in INCA, an adaptive-mesh multi-physics code, we use
 dynamic load-balancing to redistribute compute-intensive mesh
 points for both chemical reactions and thermodynamic equation
 of state solutions independently.
Atmosphere Models of Brown Dwarfs Irradiated by White Dwarfs: Analogues for Hot and Ultra-Hot Jupiters
Creators: name: Lothringer, Joshua D.
name: Casewell, Sarah L.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Irradiated brown dwarfs (BDs) provide natural laboratories to test our understanding of substellar and irradiated atmospheres. A handful of short-period BDs around white dwarfs (WDs) have been observed, but the uniquely intense UV-dominated irradiation presents a modeling challenge. Here, we present the first fully self-consistent 1D atmosphere models that take into account the UV irradiation's effect on the object's temperature structure. We explore two BD-WD systems, namely WD-0137-349 and EPIC-212235321. WD-0137-349B has an equilibrium temperature that would place it in the transition between hot and ultra-hot Jupiters, while EPIC-212235321B has an equilibrium temperature higher than all ultra-hot Jupiters except KELT-9b. We explore some peculiar aspects of irradiated BD atmospheres and show that existing photometry can be well-fit with our models. Additionally, the detections of atomic emission lines from these BDs can be explained by a strong irradiation-induced temperature inversion, similar to inversions recently explored in ultra-hot Jupiters. Our models of WD-0137-349B can reproduce the observed equivalent width of many but not all of these atomic lines. We use the observed photometry of these objects to retrieve the temperature structure using the PHOENIX ExoplaneT Retrieval Algorithm (PETRA) and demonstrate that the structures are consistent with our models, albeit somewhat cooler at low pressures. We then discuss the similarities and differences between this class of irradiated brown dwarf and the lower-mass ultra-hot Jupiters. Lastly, we describe the behavior of irradiated BDs in color-magnitude space to show the difficulty in classifying irradiated BDs using otherwise well-tested methods for isolated objects.
description: 15 pages, 12 figures. Accepted for publication in ApJ
Light front approach to correlations in hot quark matter
Creators: name: Strauss, S.
name: Beyer, M.
name: Mattiello, S.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We investigate two-quark correlations in hot and dense quark matter. To this end we use the light front field theory extended to finite temperature $T$ and chemical potential $μ$. Therefore it is necessary to develop quantum statistics formulated on the light front plane. As a test case for light front quantization at finite $T$ and $μ$ we consider the NJL model. The solution of the in-medium gap equation leads to a constituent quark mass which depends on $T$ and $μ$. Two-quark systems are considered in the pionic and diquark channel. We compute the masses of the two-body system using a $T$-matrix approach.
description: Prepared for the Quark Matter Conference 2005 in Budapest, Hungary, 4-9 Aug. 2005, 4 pages, 2 figures; two abbreviations explained and some typos corrected
Diffractive deeply inelastic scattering in future electron-ion colliders
Creators: name: Bendova, D.
name: Cepila, J.
name: Contreras, J. G.
name: Goncalves, V. P.
name: Matas, M.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The impact of nonlinear effects in the diffractive observables that will be measured in future electron-ion collisions is investigated. We present, for the first time, the predictions for the diffractive structure function and reduced cross sections derived using the solution to the Balitsky--Kovchegov equation with the collinearly-improved kernel and including the impact-parameter dependence. We demonstrate that the contribution of the diffractive events is enhanced in nuclear collisions and that the study of the ratio between the nuclear and proton predictions will be useful to discriminate among different models of the dipole-target scattering amplitude and, consequently, will allow us to constrain the description of QCD dynamics in parton densities.
description: 12 pages, 10 figures
Emerging Entanglement on Network Histories
Creators: name: Giavoni, Cecilia
name: Hofmann, Stefan
name: Koegler, Maximilian
Publisher: name: Zenodo
Year: 2023

description: This dataset is associated with

"Emerging Entanglement on Network Histories",Cecilia Giavoni, Stefan Hofmann, and Maximilian Koegler(2023)https://arxiv.org/abs/2312.17313

It includes the python 3 and mathematica files which produce the raw txt data files of figures 4, 5, 6, 7 and 8. The file names indicate to which figure they are associated with.

Abstract:

We show that quantum fields confined to Lorentzian histories of freely falling networks in Minkowski spacetime probe entanglement properties of vacuum fluctuations that extend unrestricted across spacetime regions. Albeit instantaneous field configurations are localised on one-dimensional edges, angular momentum emerges on these network histories and establishes the celebrated area scaling of entanglement entropy.
Magnetic Tower Outflows from a Radial Wire Array Z-pinch
Creators: name: Lebedev, S. . V.
name: Ciardi, A.
name: Ampleford, D.
name: Bland, S. N.
name: Bott, S. C.
name: Chittenden, J. P.
name: Hall, G.
name: Rapley, J.
name: Frank, A.
name: Blackman, E. G.
name: Lery, T.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present the first results of high energy density laboratory astrophysics experiments which explore the evolution of collimated outflows and jets driven by a toroidal magnetic field. The experiments are scalable to astrophysical flows in that critical dimensionless numbers such as the Mach number, the plasma beta and the magnetic Reynolds number are all in the astrophysically appropriate ranges. Our experiments use the MAGPIE pulsed power machine and allow us to explore the role of magnetic pressure in creating and collimating the outflow as well as showing the creation of a central jet within the broader outflow cavity. We show that currents flow along this jet and we observe its collimation to be enhanced by the additional hoop stresses associated with the generated toroidal field. Although at later times the jet column is observed to go unstable, the jet retains its collimation. We also present simulations of the magnetic jet evolution using our two-dimensional resistive magneto-hydrodynamic (MHD) laboratory code. We conclude with a discussion of the astrophysical relevance of the experiments and of the stability properties of the jet.
description: Accepted by MNRAS. 17 pages without figures. Full version with figures can be found at http://www.pas.rochester.edu/~afrank/labastro/MF230rv.pdf
Black holes of $(2+1)$-dimensional $f(R)$ gravity coupled to a scalar field
Creators: name: Karakasis, Thanasis
name: Papantonopoulos, Eleftherios
name: Tang, Zi-Yu
name: Wang, Bin
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider $f(R)$ gravity theories in the presence of a scalar field minimally coupled to gravity with a self-interacting potential in $(2+1)$-dimensions. Without specifying the form of the $f(R)$ function, we first obtain an exact black hole solution dressed with scalar hair with the scalar charge to appear in the $f(R)$ function and we discuss its thermodynamics. This solution at large distances gives a hairy BTZ black hole, and it reduces to the BTZ black hole when the scalar field decouples. In a pure $f(R)$ gravity supported by the scalar field, we find an exact hairy black hole similar to the BTZ black hole with phantom hair and an analytic $f(R)$ form and discuss its thermodynamics.
description: References added, 15 pages, 6 figures, accepted for publication in PRD
Geodesics in semi-Riemannian Manifolds: Geometric Properties and Variational Tools
Creators: name: Candela, Anna Maria
name: Sánchez, Miguel
Publisher: name: arXiv
Year: 2006
Subjects: subject: Differential Geometry (math.DG)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 53C22, 58E10, 53C50, 53C80, 58E05

description: Geodesics become an essential element of the geometry of a semi-Riemannian manifold. In fact, their differences and similarities with the (positive definite) Riemannian case, constitute the first step to understand semi-Riemannian Geometry. The progress in the last two decades has become impressive, being especially relevant the systematic introduction of (infinite-dimensional) variational methods. Our purpose is to give an overview, from refinements of classical results to updated variational settings. First, several properties (and especially completeness) of geodesics in some ambient spaces are studied. This includes heuristic constructions of compact incomplete examples, geodesics in warped, GRW or stationary spacetimes, properties in surfaces and spaceforms, or problems on stability of completeness. Then, we study the variational framework, and focus on two fundamental problems of this approach, which regards geodesic connectedness. The first one deals with a variational principle for stationary manifolds, and its recent implementation inside Causality Theory. The second one concerns orthogonal splitting manifolds, and a reasonably self-contained development is provided, collecting some steps spread in the literature.
Effects of Trial Homogeneity on the Elaboration of Colors and Objects in Visual Working Memory
Creators: name: Sobrinho, Nuno
name: Souza, Alessandra
Publisher: name: Open Science Framework
Year: 2022
Subjects: subject: Cognitive Psychology
subject: Psychology
subject: FOS: Psychology
subject: Cognition and Perception
subject: Social and Behavioral Sciences
subject: Delayed Estimation
subject: Elaboration
subject: Homogeneity
subject: Memory
subject: Mixture Modeling
subject: Prior Knowledge
subject: Visual Working Memory

description: The present study will examine if categorical guessing strategy explains the elaborative benefit found in visual working memory. Participants will be presented with mixed or pure trials of three conditions: congruent (items in their typical color), incongruent (items in other color) and neutral (items with no typical color).
Audio-Visual Biometric Recognition and Presentation Attack Detection: A Comprehensive Survey
Creators: name: Mandalapu, Hareesh
name: Reddy, P N Aravinda
name: Ramachandra, Raghavendra
name: Rao, K Sreenivasa
name: Mitra, Pabitra
name: Prasanna, S R Mahadeva
name: Busch, Christoph
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cryptography and Security (cs.CR)
subject: FOS: Computer and information sciences

description: Biometric recognition is a trending technology that uses unique characteristics data to identify or verify/authenticate security applications. Amidst the classically used biometrics, voice and face attributes are the most propitious for prevalent applications in day-to-day life because they are easy to obtain through restrained and user-friendly procedures. The pervasiveness of low-cost audio and face capture sensors in smartphones, laptops, and tablets has made the advantage of voice and face biometrics more exceptional when compared to other biometrics. For many years, acoustic information alone has been a great success in automatic speaker verification applications. Meantime, the last decade or two has also witnessed a remarkable ascent in face recognition technologies. Nonetheless, in adverse unconstrained environments, neither of these techniques achieves optimal performance. Since audio-visual information carries correlated and complementary information, integrating them into one recognition system can increase the system's performance. The vulnerability of biometrics towards presentation attacks and audio-visual data usage for the detection of such attacks is also a hot topic of research. This paper made a comprehensive survey on existing state-of-the-art audio-visual recognition techniques, publicly available databases for benchmarking, and Presentation Attack Detection (PAD) algorithms. Further, a detailed discussion on challenges and open problems is presented in this field of biometrics.