cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Discrete R-symmetries and anomaly universality in heterotic orbifolds
Creators: name: Bizet, Nana G. Cabo
name: Kobayashi, Tatsuo
name: Peña, Damián K. Mayorga
name: Parameswaran, Susha L.
name: Schmitz, Matthias
name: Zavala, Ivonne
Publisher: name: New York : Springer
Year: 2014
Subjects: subject: Wilson Line
subject: Orbifold Model
subject: Low Energy Effective Field Theory
subject: Geometrical Symmetry
subject: String Theory
subject: Finite Symmetry
subject: Explicit Computation
subject: Heterotic String
subject: Superstrings
subject: Conformal Field Model
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik
subject: Dewey Decimal Classification::500 | Naturwissenschaften::510 | Mathematik

description: We study discrete R-symmetries, which appear in the 4D low energy effective field theory derived from heterotic orbifold models. We derive the R-symmetries directly from the geometrical symmetries of the orbifolds. In particular, we obtain the corresponding R-charges by requiring that the couplings be invariant under these symmetries. This allows for a more general treatment than the explicit computations of correlation functions made previously by the authors, including models with discrete Wilson lines, and orbifold symmetries beyond plane-by-plane rotational invariance. The R-charges obtained in this manner differ from those derived in earlier explicit computations. We study the anomalies associated with these R-symmetries, and comment on the results.
The interaction of working memory and Uncertainty (mis)estimation in context-dependent outcome estimation
Creators: name: Lim, Li Xin
Publisher: name: Purdue University Graduate School
Year: 2023
Subjects: classificationCode: 461105
subject: Reinforcement learning
classificationCode: 520499
subject: Cognitive and computational psychology not elsewhere classified

description: In the context of reinforcement learning, extensive research has shown how reinforcement learning was facilitated by the estimation of uncertainty to improve the ability to make decisions. However, the constraints imposed by the limited observation of the process of forming environment representation have seldom been a subject of discussion. Thus, the study intended to demonstrate that when incorporating a limited memory into uncertainty estimation, individuals potentially misestimate outcomes and environmental statistics. The study included a computational model that included the process of active working memory and lateral inhibition in working memory (WM) to describe how the relevant information was chosen and stored to form estimations of uncertainty in forming outcome expectations. The active working memory maintained relevant information not just by the recent memory, but also with utility. With the relevant information stored in WM, the model was able to estimate expected uncertainty and perceived volatility and detect contextual changes or dynamics in the outcome structure. Two experiments to investigate limitations in information availability and uncertainty estimation were carried out. The first experiment investigated the impact of cognitive loading on the reliance on memories to form outcome estimation. The findings revealed that introducing cognitive loading diminished the reliance on memory for uncertainty estimations and lowered the expected uncertainty, leading to an increased perception of environmental volatility. The second experiment investigated the ability to detect changes in outcome noise under different conditions of outcome exposure. The study found differences in the mechanisms used for detecting environmental changes in various conditions. Through the experiments and model fitting, the study showed that the misestimation of uncertainties was reliant on individual experiences and relevant information stored in WM under a limited capacity.
Störfestigkeitsuntersuchung eines Unmanned Aerial Vehicles mit Hilfe der stochastischen Beschreibung der Subsysteme
Creators: name: Brech, Henrik
name: Garbe, Heyno
Publisher: name: Aachen : Apprimus
Year: 2020
Subjects: subject: UAV
subject: Störfestigkeit
subject: DUT
subject: Konferenzschrift
subject: Dewey Decimal Classification::600 | Technik
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau::621 | Angewandte Physik::621,3 | Elektrotechnik, Elektronik

description: In den letzten Jahren hat die Anzahl an Unmanned Aerial Vehicles (UAV) aufgrund der starken Kommerzialisierung zugenommen. Neben der Nutzung zu Freizeitzwecken können diese Flugobjekte jedoch auch zur Gefährdung für kritische Infrastrukturen und Menschenleben werden. Ein Beispiel für die Gefährdung einer kritischen Infrastruktur war im Jahr 2018 die Störung des Flugbetriebs am Flughafens London-Gatwick [1]. In [2] wurde von Potthast gezeigt, dass UAVs elektromagnetisch beeinflusst werden können. Die Untersuchung der elektromagnetischen Störfestigkeit von UAVs ist aus diesem Grund von hohem Interesse. UAVs sind im Allgemeinen komplexe Systeme aus verschiedenen elektronischen Komponenten. Große, komplexe Device Under Test (DUT) erschweren die Störfestigkeitsuntersuchungen und lassen weniger Rückschlüsse auf verletzliche Komponenten des DUT zu. Aus diesem Grund wird für diese Ausarbeitung ein komplexes UAV in weniger komplexe Subsysteme zerlegt. Die elektromagnetische Störung auf die Funkkommunikation zwischen Nutzer und DUT, das sogenannte Jamming, wird nicht in dieser Ausarbeitung nicht untersucht. Es werden nur feldgebundene Störungen der jeweiligen Systeme untersucht. Ziel ist die Störfestigkeitsuntersuchung des Gesamtsystems und der Subsysteme. Dabei sollen Störgrenzen der einzelnen Systeme ermittelt werden und die verletzlichen Komponenten detektiert werden. Die Störfestigkeitsgrenzen und die Muster der auftretenden Störungen sollen verglichen werden, um die Eignung der Subsystemzerlegung zur Störfestigkeitsprüfung zu ermitteln.
Ballistic bipolar junctions in chemically gated graphene ribbons
Creators: name: Baringhaus, Jens
name: Stöhr, Alexander
name: Forti, Stiven
name: Starke, Ulrich
name: Tegenkamp, Christoph
Publisher: name: London : Nature Publishing Group
Year: 2015
Subjects: subject: Surfaces
subject: interfaces and thin films
subject: Graphene
subject: Electronic properties and devices
subject: Graphen
subject: Oberfläche
subject: Graphen
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: The realization of ballistic graphene pn-junctions is an essential task in order to study Klein tunneling phenomena. Here we show that intercalation of Ge under the buffer layer of pre-structured SiC-samples succeeds to make truly nano-scaled pn-junctions. By means of local tunneling spectroscopy the junction width is found to be as narrow as 5 nm which is a hundred times smaller compared to electrically gated structures. The ballistic transmission across the junction is directly proven by systematic transport measurements with a 4-tip STM. Various npn- and pnp-junctions are studied with respect to the barrier length. The pn-junctions are shown to act as polarizer and analyzer with the second junction becoming transparent in case of a fully ballistic barrier. This can be attributed to the almost full suppression of electron transmission through the junction away from normal incidence.
Development of a DNA Barcoding System for Seagrasses: Successful but Not Simple
Creators: name: Lucas, Christina
name: Thangaradjou, Thirunavakkarasu
name: Papenbrock, Jutta
Publisher: name: San Francisco : Public Library of Science
Year: 2012
Subjects: subject: Land Plants
subject: Seagrass
subject: Reticulate evolution
subject: Zosteric acid
subject: Sequence data
subject: New Zealand
subject: Phylogeny
subject: Hydrocharitaceae
subject: Identification
subject: Diversity
subject: Taxonomy
subject: Seegras
subject: Retikulate Evolution
subject: Vernetzte Evolution
subject: Sequenzdaten
subject: Phylogenese
subject: Abstammung
subject: Neuseeland
subject: Identifizierung
subject: Vielfalt
subject: Diversität
subject: Froschbissgewächse
subject: Taxonomie
subject: Klassifikation
subject: Seegras
subject: Evolution
subject: Zosteric Acid
subject: Sequenzdaten
subject: Phylogenie
subject: Neuseeland
subject: Identifikation
subject: Vielfalt
subject: Froschbissgewächse
subject: Taxonomie
subject: Dewey Decimal Classification::500 | Naturwissenschaften::580 | Pflanzen (Botanik)

description: Seagrasses, a unique group of submerged flowering plants, profoundly influence the physical, chemical and biological environments of coastal waters through their high primary productivity and nutrient recycling ability. They provide habitat for aquatic life, alter water flow, stabilize the ground and mitigate the impact of nutrient pollution. at the coast region. Although on a global scale seagrasses represent less than 0.1% of the angiosperm taxa, the taxonomical ambiguity in delineating seagrass species is high. Thus, the taxonomy of several genera is unsolved. While seagrasses are capable of performing both, sexual and asexual reproduction, vegetative reproduction is common and sexual progenies are always short lived and epimeral in nature. This makes species differentiation often difficult, especially for non-taxonomists since the flower as a distinct morphological trait is missing. Our goal is to develop a DNA barcoding system assisting also non-taxonomists to identify regional seagrass species. The results will be corroborated by publicly available sequence data. The main focus is on the 14 described seagrass species of India, supplemented with seagrasses from temperate regions. According to the recommendations of the Consortium for the Barcoding of Life (CBOL) rbcL and matK were used in this study. After optimization of the DNA extraction method from preserved seagrass material, the respective sequences were amplified from all species analyzed. Tree-and character-based approaches demonstrate that the rbcL sequence fragment is capable of resolving up to family and genus level. Only matK sequences were reliable in resolving species and partially the ecotype level. Additionally, a plastidic gene spacer was included in the analysis to confirm the identification level. Although the analysis of these three loci solved several nodes, a few complexes remained unsolved, even when constructing a combined tree for all three loci. Our approaches contribute to the understanding of the morphological plasticity of seagrasses versus genetic differentiation.
Michael Chekhov's embodied imagination and the haptic sense
Creators: name: Christensen, JA
Publisher: name: University Of Tasmania
Year: 2023

description: In the 21st Century, the affectivity of performance, its ability to arouse sensations and emotional responses in spectators, has been the subject of much enquiry. This study adds to this debate by investigating the impact of the haptic sense on the affectivity of theatre performance. The haptic sense is a three-fold construct combining, touch (tactile and metaphoric), proprioception and kinesthesia. A significant gap in the current research is how the actor uses kinesthesia in creative process. This study addresses this gap by examining the correlations between the haptic sense and the embodied imagination across three domains, namely, pre-performative training, rehearsal and performance. During the first phase, pre-performative training, I deliver a pedagogical sequence of instruction in the Michael Chekhov Acting Technique to a small ensemble of undergraduate student actors. Data is collected to evidence a strengthening of the haptic sense, concentration and imagination. In the second phase, I use the Michael Chekhov Technique to create a haptic rehearsal process for the embodiment of the dramaturgy Fishskin Trousers. Alongside the traditional canon of Chekhov exercises and tools, I create movement etudes by combining aspects of the Chekhov Technique with the moment work of Tectonic Theatre Project. Data evidences the ensembles increasing capacity to be touched by the inner impressions of the haptic sense and allow this to shape their impulses and outer expression. The third phase of the research presents data relating to the use of the Chekhov's embodied imagination in performance and the actor's ability to affect and be affected by the audience. This research project has been significantly impacted by the Covid-19 pandemic. In each phase of the project, federal and regional social distancing measures have radically altered the traditional theatre practice environment of co-presence in a shared physical space. Throughout this exegesis I reflect as actor trainer and theatre director on the shift in our creative spaces, from the co-presence of the studio to the sharing of virtual and hybrid spaces. Specifically, I address the nature of delivering an embodied practice online, the problem of inter-affectivity in hybrid environments and its impact on the power structure of a co-creative and co-collaborative process. Finally, I comment on the digital reception of the live theatre event and its capacity to touch or move its audience.
Study of unconventional superfluid phases and the phase dynamics in spin-orbit coupled bose system
Creators: name: Dutta, Anirban
name: Mandal, Saptarshi
Publisher: name: arXiv
Year: 2013
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study the phase distribution and its dynamics in spin-orbit coupled two component ultracold Bosons for finite size system. Using an inhomogeneous meanfield analysis we demonstrate how phase distribution evolves as we tune the spin-orbit coupling $γ$ and $t$, the spin-independent hopping. For $t>>γ$ we find the homogeneous superfluid phase. As we increase $γ$, differences in the phases of the order parameter grows leading to twisted superfluid phase. For $t \sim γ$ competing orderings in the phase distribution is observed. At large $γ$ limit a Ferro-Magnetic stripe ordering appears along the diagonal. We explain that this is due to the frustration bought in by the spin-orbit interaction. Isolated vortex formation is also shown to appear. We also investigate the possible collective modes. In deep superfluid regime we derive the equation of motion for the phases following a semi-classical approximation. Imaginary frequencies indicating the damped modes are seen to appear and the dynamics of lowest normal modes are discussed.
description: 7 pages, 7 Figures
Flavor-Nonuniversal Dark Gauge Bosons and the Muon g-2
Creators: name: Carone, Christopher D.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The possibility of explaining the current value of the muon anomalous magnetic moment in models with an additional U(1) gauge symmetry that has kinetic mixing with hypercharge are increasingly constrained by dark photon searches at electron accelerators. Here we present a scenario in which the couplings of new, light gauge bosons to standard model leptons are naturally weak and flavor non-universal. A vector-like state that mixes with standard model leptons serves as a portal between the dark and standard model sectors. The flavor symmetry of the model assures that the induced couplings of the new gauge sector to leptons of the first generation are very small and lepton-flavor-violating processes are adequately suppressed. The model provides a framework for constructing ultraviolet complete theories in which new, light gauge fields couple weakly and dominantly to leptons of the second or third generations.
description: 13 pages LaTeX, 2 eps figures
title: Dirk Lornsen: Rokal – Der Steinzeitjäger
Creators: name: Auler, Jost
Publisher: name: University Library Heidelberg
Year: 2015

description: Rezension zu: Dirk Lomsen: Rokal - Der Steinzeitjäger. Verlag Thienemann, Stuttgart/Wien 1987, 112 S., 16 SWAbb., DM 18,00
Potamogeton perfoliatus L.
Creators: name: Becherer
Publisher: name: Zenodo
Year: 1956
Subjects: Biodiversity
Taxonomy

description: P. perfoliatus L. Cat. 332. 2: In der Sarvaz zwischen Mazembroz und Saillon, seinerzeit in grösster IVIenge, jetzt durch die Trockenlegung auf die Kanälebeschränkt,im Grenzgürtelmit Eleocharis acicularis besonders in der var. densifolius G. F. W. Meyer (Gams).
description: Published as part of Becherer, 1956, Florae Vallesiacae Supplementum, pp. 1-556 in Denkschriften der Schweizerischen Naturforschenden Gesellschaft 71 on pages 1-556
Characterization of powellite-based solid solutions by site-selective time resolved laser fluorescence spectroscopy
Creators: name: Schmidt, Moritz
name: Heck, Stephanie
name: Bosbach, Dirk
name: Ganschow, Steffen
name: Walther, Clemens
name: Stumpf, Thorsten
Publisher: name: Cambridge : Royal Society of Chemistry
Year: 2013
Subjects: subject: europium(III) luminescence
subject: transition frequency
subject: complexes
subject: glass
subject: lanthanide
subject: eu(iii)
subject: system
subject: chemistry
subject: ceramics
subject: number
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie

description: We present a comprehensive study of the solid solution system Ca-2(MoO4)(2)-NaGd(MoO4)(2) on the molecular scale, by means of site-selective time resolved laser fluorescence spectroscopy (TRLFS). Eu3+ is used as a trace fluorescent probe, homogeneously substituting for Gd3+ in the solid solution crystal structure. Site-selective TRLFS of a series of polycrystalline samples covering the whole composition range of the solid solution series from 10% substitution of Ca2+ to the NaGd end-member reveals it to be homogeneous throughout the whole range. The trivalent ions are incorporated into the powellite structure in only one coordination environment, which exhibits a very strong ligand-metal interaction. Polarization-dependent measurements of a single crystal of NaGd(Eu)(MoO4)(2) identify the coordination geometry to be of C-2v point symmetry. The S-4 symmetry of the Ca site within the powellite lattice can be transformed into C-2v assuming minor motion in the first coordination sphere.
Nucleosynthesis in the accretion disks of Type II collapsars
Creators: name: Banerjee, Indrani
name: Mukhopadhyay, Banibrata
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We investigate nucleosynthesis inside the gamma-ray burst (GRB) accretion disks formed by the Type II collapsars. In these collapsars, the core collapse of massive stars first leads to the formation of a proto-neutron star and a mild supernova explosion is driven. However, this supernova ejecta lack momentum and falls back onto the neutron star which gets transformed to a stellar mass black hole. In order to study the hydrodynamics and nucleosynthesis of such an accretion disk formed from the fallback material of the supernova ejecta, we use the well established hydrodynamic models. In such a disk neutrino cooling becomes important in the inner disk where the temperature and density are higher. Higher the accretion rate (dot{M}), higher is the density and temperature in the disks. In this work we deal with accretion disks with relatively low accretion rates: 0.001 M_sun s^{-1} \lesssim dot{M} \lesssim 0.01 M_sun s^{-1} and hence these disks are predominantly advection dominated. We use He-rich and Si-rich abundances as the initial condition of nucleosynthesis at the outer disk, and being equipped with the disk hydrodynamics and the nuclear network code, we study the abundance evolution as matter inflows and falls into the central object. We investigate the variation in the nucleosynthesis products in the disk with the change in the initial abundance at the outer disk and also with the change in the mass accretion rate. We report the synthesis of several unusual nuclei like {31}P, {39}K, {43}Sc, {35}Cl, and various isotopes of titanium, vanadium, chromium, manganese and copper. We also confirm that isotopes of iron, cobalt, nickel, argon, calcium, sulphur and silicon get synthesized in the disk, as shown by previous authors. Much of these heavy elements thus synthesized are ejected from the disk via outflows and hence they should leave their signature in observed data.
description: 13 pages including 4 figures; to appear in Research in Astronomy and Astrophysics
Aggregation-Induced Improvement of Catalytic Activity by Inner-Aggregate Electronic Communication of Metal-Fullerene-Based Surfactants
Creators: name: Kunkel, Marius
name: Bitter, Stefan
name: Sailer, Frank
name: Winter, Rainer F.
name: Polarz, Sebastian
Publisher: name: Weinheim : WILEY-VCH Verlag
Year: 2020
Subjects: subject: (homogeneous) catalysis
subject: catalyst
subject: electrochemistry
subject: hydrogen evolution (HER)
subject: oxygen evolution reactions (OER)
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie

description: A paradigm for active constituents in (homogeneous) catalysis is that optimum performance requires maximum dispersion. Generally, aggregation results in a decline. This is a different case in supramolecular catalysis. A new concept based on surfactants equipped with functional heads is presented, which becomes a more active catalyst itself upon aggregation. The head group of the surfactants is composed of a diethylenetriamine-functionalized fullerene capable of coordinating to catalytically active metals like CoII. The improvement of catalytic properties upon aggregation is demonstrated via electrocatalytic water-splitting reaction as a model system. Detailed electrochemistry studies were performed at concentrations below and above the critical aggregation concentration (cac). While isolated surfactant molecules represent only moderately active catalysts, drastic improvement of efficiency in the hydrogen evolution (HER) as well as in the oxygen evolution reactions (OER) were detected, once vesicular structures have formed. Self-organization of the surfactants leads to an increase in turnover frequencies of up to 1300 % (HER). The strongly beneficial effect of aggregation arises from the favorable alignment of individual molecules, thus, facilitating intermolecular charge transfer processes in the vesicles. © 2020 The Authors. Published by Wiley-VCH Verlag GmbH & Co. KGaA.
Fragebogen zur Erfassung der diagnostischen Kompetenz von Lehrkräften in der inklusiven Schule (DaKI, Version 0.2)
Creators: name: Jungjohann, Jana
name: Gebhardt, Markus
Publisher: name: Universität Regensburg
Year: 2023
Subjects: subject: Diagnostische Kompetenz, Fragebogen, Lernausgangslage, Lernschwierigkeiten, Lernverlaufsdiagnostik, Statusdiagnostik, Schulleistungsdiagnostik
subject: 370 Erziehung, Schul- und Bildungswesen

description: Der Fragebogen dient der Erfassung diagnostischer Kompetenzen von Lehramtsstudierenden, LehramtsanwärterInnen, ReferendarInnen und Lehrkräfte im Bereich der inklusiven Schule. Der Fragebogen besteht aus den vier Dimensionen (1) fachdidaktische Diagnostikkompetenzen, (2) Schulleistungs- und Statusdiagnostik, (3) sonderpädagogische Feststell- und Förderdiagnos-tik und (4) Lernverlaufsdiagnostik. Die vierte Dimension sonderpädagogische Feststell- und Förderdiagnostik ist für sonderpädagogische Lehrkräfte konstruiert, während die anderen Dimensionen alle Lehrkräfte beantworten können. Angenommen wird, dass der Unterricht in allen Schulformen differenziert und individuell passend für alle SchülerInnen geplant und gestaltet wird. Ein fachliches Grundwissen sowie diagnostische Kompetenzen sind hierfür insbesondere in der inklusiven Schule und auch in Förderschulen notwendig, um datenbasierte Förderentscheidungen treffen zu können. Der Fragebogen dient als Grundlage zur Erfassung der diagnostischen Kompetenz von Lehrkräften, um Fortbildungen für den Bereich Diagnostik zu planen.
The magnetic field in the X-ray corona of Cygnus X-1
Creators: name: Del Santo, Melania
name: Malzac, Julien
name: Belmont, Renaud
name: Bouchet, Laurent
name: De Cesare, Giovanni
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The different electron distributions in the hard and soft spectral states (HS and SS) of BH binaries could be caused by kinetic processes and changing because of varying physical conditions in the corona. In presence of a magnetic field in the corona, the electron distribution can appear thermal, even when acceleration mechanisms would produce non thermal distributions. This is due to fast and efficient thermalization through synchrotron self-absorption. We have analyzed data from 6 years of observations of Cygnus X-1 with the INTEGRAL observatory and produced 12 high-quality, stacked broad-band hard X-ray spectra representative of the whole range of spectral shapes observed. We then fit these spectra with hybrid thermal/non-thermal Comptonization models and study the evolution of the physical parameters of the accretion flow across the spectral transition. In particular, we use the BELM model to constrain the magnetic field in the corona through its effects on the coronal emission. Indeed, the hot electrons of the X-ray corona produce soft (optical-UV) synchrotron radiation which is then Comptonized and may affect the temperature of the electrons through Compton cooling. We find that in the SS, the emission is dominated by Comptonization of the disc photons and the magnetic field is at most of the order of 1E+06 G. In the hard states, the data are consistent with a pure synchrotron self-Compton model. If the non-thermal excess observed above a few hundred keV in the HS is produced in the same region as the bulk of the thermal Comptonization, we obtain an upper limit on the coronal magnetic field of about 1E+05 G. If, on the other hand, the non-thermal excess is produced in a different location, the constraints on the magnetic field in the HS are somewhat relaxed and the upper limit rises to 1E+07 G. We discuss these constraints in the context of current accretion flow models.
description: MNRAS, in press, 15 pages, 10 figures, 5 tables
Erratum: Ground-state properties of few dipolar bosons in a quasi-one-dimensional harmonic trap (Physical Review A - Atomic, Molecular, and Optical Physics (2010) 81 (063616))
Creators: name: Deuretzbacher, Frank
name: Cremon, J.C.
name: Reimann, S.M.
Publisher: name: College Park, MD : American Physical Society
Year: 2013
Subjects: subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: Erratum to Ground-state properties of few dipolar bosons in a quasi-one-dimensional harmonic trap, In: Physical Review A - Atomic, Molecular, and Optical Physics (2010) 81 (063616)
Controllable generation of mixed two-photon states
Creators: name: Dai, Jibo
name: Len, Yink Loong
name: Teo, Yong Siah
name: Krivitsky, Leonid A.
name: Englert, Berthold-Georg
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We report a controllable method for producing mixed two-photon states via Spontaneous Parametric Down-Conversion with a two-type-I crystal geometry. By using variable polarization rotators (VPRs), one obtains mixed states of various purities and degrees of entanglement depending on the parameters of the VPRs. The generated states are characterized by quantum state tomography. The experimental results are found to be in good agreement with the theory. The method can be easily implemented for various experiments which require the generation of states with controllable degrees of entanglement or mixedness.
description: submitted for publication
Integration of thin film thermoelectric oxide material into micro thermoelectric generators
Creators: name: Iñigo Martin-Fernandez
name: Salleras, Marc
name: Arindom Chatterjee
name: Rodriguez-Iglesias, Alex
name: Fernandez-Regulez, Marta
name: Bauitti, Federico
name: Morata, Alex
name: Tarancon, Albert
name: Pryds, Nini
name: Libertad Abad
name: Santander, Joaquín
name: Fonseca, Luis
Publisher: name: Zenodo
Year: 2023

description: Poster presentation on the research on thermoelectric generators based on Nb doped STO thin films developed in the frame of the Harvestore project (GA: 824072)
Crystal Structure and Magnetic Properties of the Ba3TeCo3P2O14, Pb3TeCo3P2O14, and Pb3TeCo3V2O14 Langasites
Creators: name: Krizan, J. W.
name: de la Cruz, C.
name: Andersen, N. H.
name: Cava, R. J.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We report the structural and magnetic characterizations of Ba3TeCo3P2O14, Pb3TeCo3P2O14, and Pb3TeCo3V2O14, compounds that are based on the mineral Dugganite, which is isostructural to Langasites. The magnetic part of the structure consists of layers of Co2+ triangles. Nuclear and magnetic structures were determined through a co-refinement of synchrotron and neutron powder diffraction data. In contrast to the undistorted P321 Langasite structure of Ba3TeCo3P2O14, a complex structural distortion yielding a large supercell is found for both Pb3TeCo3P2O14 and Pb3TeCo3V2O14. Comparison of the three compounds studied along with the zinc analog Pb3TeZn3P2O14, also characterized here, suggests that the distortion is driven by Pb2+ lone pairs; as such, the Pb compounds crystallize in a pyroelectric space group, P2. Magnetic susceptibility, magnetization, and heat capacity measurements were performed to characterize the magnetic behavior. All three compounds become antiferromagnetic with Néel temperatures TN ~ 21 K (Ba3TeCo3P2O14), ~ 13 K (Pb3TeCo3P2O14), and ~ 8 K (Pb3TeCo3V2O14), and they exhibit magnetic transitions at high applied magnetic fields, suggesting intrinsically complex magnetic behavior for tetrahedrally coordinated d7 Co2+ in this structure type.
description: Submitted to Chemistry of Materials, 37 double spaced pages, 8 tables, 12 figures
Effect of Query Formation on Web Search Engine Results
Creators: name: Bisht, Raj Kishor
name: Bisht, Ila Pant
Publisher: name: arXiv
Year: 2013
Subjects: subject: Information Retrieval (cs.IR)
subject: FOS: Computer and information sciences

description: Query in a search engine is generally based on natural language. A query can be expressed in more than one way without changing its meaning as it depends on thinking of human being at a particular moment. Aim of the searcher is to get most relevant results immaterial of how the query has been expressed. In the present paper, we have examined the results of search engine for change in coverage and similarity of first few results when a query is entered in two semantically same but in different formats. Searching has been made through Google search engine. Fifteen pairs of queries have been chosen for the study. The t-test has been used for the purpose and the results have been checked on the basis of total documents found, similarity of first five and first ten documents found in the results of a query entered in two different formats. It has been found that the total coverage is same but first few results are significantly different.
description: 6 pages, journal
A COMPOUND OF GAMMA AND SHANKER DISTRIBUTION
Creators: name: Mousumi Ray
name: Shanker, Rama
Publisher: name: Reliability: Theory & Applications
Year: 2023
Subjects: Lifetime distribution
Statistical Properties
Stress-strength reliability
Maximum Likelihood estimation
Goodness of fit

description: This paper considers a new lifetime distribution called Gamma-Shanker distribution which is a compound of Gamma and Shanker distribution. Many important properties of the suggested distribution including its shape, Inverse moments, hazard rate function, reversed hazard rate function, quantile function and stress-strength reliability have been discussed. The estimation of its parameters has been discussed using maximum likelihood estimation. Goodness of fit of the proposed distribution has been explained with two examples of real lifetime data from biomedical sciences and it shows that the proposed distribution gives much closure fit over the considered distributions.
Measuring Earth: Current status of the GRACE Follow-On Laser Ranging Interferometer
Creators: name: Schütze, Daniel
Publisher: name: Bristol : Institute of Physics Publishing
Year: 2016
Subjects: subject: Geodetic satellites
subject: Gravitational effects
subject: Gravity waves
subject: Groundwater
subject: Interferometers
subject: NASA
subject: Orbits
subject: Flight hardware
subject: Gravitational wave detectors
subject: Ground water depletions
subject: Hydrological system
subject: Intersatellite distance
subject: Low-orbit satellites
subject: Gravitationswelle
subject: Konferenzschrift
subject: Dewey Decimal Classification::500 | Naturwissenschaften
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: The GRACE mission that was launched in 2002 has impressively proven the feasibility of low-orbit satellite-to-satellite tracking for Earth gravity observations. Especially mass transport related to Earth's hydrological system could be well resolved both spatially and temporally. This allows to study processes such as polar ice sheet decline and ground water depletion in great detail. Owing to GRACE's success, NASA and GFZ will launch the successor mission GRACE Follow-On in 2017. In addition to the microwave ranging system, GRACE Follow-On will be the first mission to use a Laser Ranging Interferometer as technology demonstrator to track intersatellite distance changes with unprecedented precision. This new ranging device inherits some of the technologies which have been developed for the future spaceborne gravitational wave detector LISA. I will present the architecture of the Laser Ranging Interferometer, point out similarities and differences to LISA, and conclude with the current status of the flight hardware production.
Exchange interaction in chirally coupled quantum dots
Creators: name: Tutuc, Daniel
name: Heine, Alexander W.
name: Schuh, Dieter
name: Wegscheider, Werner
name: Haug, Rolf J.
Publisher: name: Bristol : IOP Publishing Ltd.
Year: 2013
Subjects: subject: single-electron transistor
subject: oxidation
subject: system
subject: Physics, Multidisciplinary
subject: Physics, Condensed Matter
subject: Konferenzschrift
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: We present transport measurements on a system of two lateral quantum dots in a perpendicular magnetic field. Due to edge channel formation in an open conducting region, the quantum dots are chirally coupled. When both quantum dots are tuned into the Kondo regime simultaneously, we observe a change in the temperature dependence of the differential conductance. This is explained by the RKKY exchange interaction between the two dots. As a function of bias the differential conductance shows a splitting of the Kondo resonance which changes in the presence of RKKY interaction.
Deep sea explosive eruptions may be not so different from subaerial eruptions
Creators: name: Iezzi, Gianluca
name: Lanzafame, Gabriele
name: Mancini, Lucia
name: Behrens, Harald
name: Tamburrino, Stella
name: Vallefuoca, Mattia
name: Passara, Salvatore
name: Signanini, Patrizio
name: Ventura, Guido
Publisher: name: [London] : Macmillan Publishers Limited, part of Springer Nature
Year: 2020
Subjects: subject: deep sea
subject: sea environment
subject: submarine eruptions
subject: micro-computed tomography
subject: Dewey Decimal Classification::500 | Naturwissenschaften
subject: Dewey Decimal Classification::600 | Technik

description: The dynamics of deep sea explosive eruptions, the dispersion of the pyroclasts, and how submarine eruptions differ from the subaerial ones are still poorly known due to the limited access to sea environments. Here, we analyze two ash layers representative of the proximal and distal deposits of two submarine eruptions from a 500 to 800 m deep cones of the Marsili Seamount (Italy). Fall deposits occur at a distance of more than 1.5 km from the vent, while volcanoclastic flows are close to the flanks of the cone. Ash shows textures indicative of poor magma-water interaction and a gas-rich environment. X-ray microtomography data on ash morphology and bubbles, along with gas solubility and ash dispersion models suggest 200–400 m high eruptive columns and a sea current velocity <5 cm/s. In deep sea environments, Strombolian-like eruptions are similar to the subaerial ones provided that a gas cloud occurs around the vent. © 2020, The Author(s).
Unified understanding of the valence transition in the rare-earth monochalcogenides under pressure
Creators: name: Jarrige, Ignace
name: Yamaoka, Hitoshi
name: Rueff, Jean-Pascal
name: Lin, Jung-Fu
name: Taguchi, Munetaka
name: Hiraoka, Nozomu
name: Ishii, Hirofumi
name: Tsuei, Ku-Ding
name: Imura, Keiichiro
name: Matsumura, Takeshi
name: Ochiai, Akira
name: Suzuki, Hiroyuki S.
name: Kotani, Akio
Publisher: name: arXiv
Year: 2013
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Valence instability is a key ingredient of the unusual properties of f electron materials, yet a clear understanding is lacking as it involves a complex interplay between f electrons and conduc- tion states. Here we propose a unified picture of pressure-induced valence transition in Sm and Yb monochalcogenides, considered as model system for mixed valent 4f-electron materials. Using high-resolution x-ray absorption spectroscopy, we show that the valence transition is driven by the promotion of a 4f electron specifically into the lowest unoccupied (LU) 5d t2g band. We demonstrate with a promotional model that the nature of the transition at low pressures is intimately related to the density of states of the LU band, while at high pressures it is governed by the hybridization strength. These results set a new standard for the generic understanding of valence fluctuations in f-electron materials.
Asymptotic Hurwitz numbers
Creators: name: Mironov, A.
name: Morozov, A.
name: Natanzon, S.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Combinatorics (math.CO)
subject: Geometric Topology (math.GT)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: The classical Hurwitz numbers of degree n together with the Hurwitz numbers of the seamed surfaces of degree n give rise to the Klein topological field theory. We extend this construction to the Hurwitz numbers of all degrees at once. The corresponding Cardy-Frobenius algebra is induced by arbitrary Young diagrams and arbitrary bipartite graphs. It turns out to be isomorphic to the algebra of differential operators from arXiv:1210.6955 which serves a model for open-closed string theory. The operator associated with the Young diagram of the transposition of two elements coincides with the cut-and-join operator which gives rise to relations for the classical Hurwitz numbers. We prove that the operators corresponding to arbitrary Young diagrams and bipartite graphs also give rise to relations for the Hurwitz numbers.
description: 13 pages
Potamogeton praelongus Wulfen
Creators: name: Becherer
Publisher: name: Zenodo
Year: 1956
Subjects: Biodiversity
Taxonomy

description: P.praelongus Wulfen Cat. 332. Keine neuen Stellen. Einziger Fundort im Wallis der im Cat. verzeichnete: Bettmersee ob der Riederalp (Distr. 4); Höhenquote «2050 m» hier zu berichtigen in 2006 m.
description: Published as part of Becherer, 1956, Florae Vallesiacae Supplementum, pp. 1-556 in Denkschriften der Schweizerischen Naturforschenden Gesellschaft 71 on pages 1-556
Functional magnetic resonance imaging (fMRI) item analysis of empathy and theory of mind
Creators: name: Tholen, Mathias G.
name: Trautwein, Fynn-Mathis
name: Böckler, Anne
name: Singer, Tania
name: Kanske, Philipp
Publisher: name: New York, NY : Wiley-Liss
Year: 2020
Subjects: subject: functional magnetic resonance imaging (fMRI)
subject: fMRI paradigm (EmpaToM)
subject: Theory of Mind (ToM)
subject: temporoparietal junction/supramarginal gyrus (TPJ)
subject: Dewey Decimal Classification::600 | Technik::610 | Medizin, Gesundheit

description: In contrast to conventional functional magnetic resonance imaging (fMRI) analysis across participants, item analysis allows generalizing the observed neural response patterns from a specific stimulus set to the entire population of stimuli. In the present study, we perform an item analysis on an fMRI paradigm (EmpaToM) that measures the neural correlates of empathy and Theory of Mind (ToM). The task includes a large stimulus set (240 emotional vs. neutral videos to probe empathic responding and 240 ToM or factual reasoning questions to probe ToM), which we tested in two large participant samples (N = 178, N = 130). Both, the empathy-related network comprising anterior insula, anterior cingulate/dorsomedial prefrontal cortex, inferior frontal gyrus, and dorsal temporoparietal junction/supramarginal gyrus (TPJ) and the ToM related network including ventral TPJ, superior temporal gyrus, temporal poles, and anterior and posterior midline regions, were observed across participants and items. Regression analyses confirmed that these activations are predicted by the empathy or ToM condition of the stimuli, but not by low-level features such as video length, number of words, syllables or syntactic complexity. The item analysis also allowed for the selection of the most effective items to create optimized stimulus sets that provide the most stable and reproducible results. Finally, reproducibility was shown in the replication of all analyses in the second participant sample. The data demonstrate (a) the generalizability of empathy and ToM related neural activity and (b) the reproducibility of the EmpaToM task and its applicability in intervention and clinical imaging studies. © 2020 The Authors. Human Brain Mapping published by Wiley Periodicals, Inc.
ANALYSIS OF A NON-IDENTICAL COMPONENTSTRENGTHS SYSTEM BASED ON LOWER RECORD DATA
Creators: name: Hassan, Amal S.
name: Doaa M. Ismail
name: Nagy, Heba F.
Publisher: name: Reliability: Theory & Applications
Year: 2023
Subjects: Exponentiated Pareto model
Lower record data
Bayesian inference
General entropy loss function

description: In engineering applications and reliability literature, stress-strength models play a crucial role. The goal of this study is to develop more accurate stress-strength models by addressing the reliability estimation in multi-component systems with non-identical component strengths and stress. In the context of lower record values, the system's reliability is assessed using both classical and Bayesian approaches. In classical estimation, the maximum likelihood estimator of the reliability function is constructed, and a simulation study based on measurements of precision is used to assess the behavior of various estimates. The Bayesian estimators of reliability under general entropy, logarithmic and precautionary loss functions are computed. The suggested Bayesian estimates are calculated using the Markov Chain Monte Carlo method through a simulation study because there is no one particular way to do it. We found through simulated research that the accuracy of measurements decreases as the number of records rises. The theoretical results are validated using an example from actual data sets.
Ultra-thin passivation layers in Cu(In,Ga)Se2 thin-film solar cells: full-area passivated front contacts and their impact on bulk doping
Creators: name: Werner, Florian
name: Veith-Wolf, Boris
name: Melchiorre, Michele
name: Babbe, Finn
name: Schmidt, Jan
name: Siebentritt, Susanne
Publisher: name: [London] : Macmillan Publishers Limited, part of Springer Nature
Year: 2020
Subjects: subject: solar cells
subject: atomic layer deposition
subject: photovoltaic
subject: Dewey Decimal Classification::500 | Naturwissenschaften
subject: Dewey Decimal Classification::600 | Technik

description: In the search for highly transparent and non-toxic alternative front layers replacing state-of-the-art CdS in Cu(In,Ga)Se2 thin-film solar cells, alternatives rarely exceed reference devices in terms of efficiency. Full-area ultra-thin aluminium oxide tunnelling layers do not require any contact patterning and thus overcome the main drawback of insulating passivation layers. Even a few monolayers of aluminium oxide can be deposited in a controlled manner by atomic layer deposition, they show excellent interface passivation properties, low absorption, and suitable current transport characteristics on test devices. Depositing a ZnO-based transparent front contact, however, results in extremely poor solar cell performance. The issue is not necessarily a low quality of the alternative front layer, but rather the intricate relation between front layer processing and electronic bulk properties in the absorber layer. We identify three challenges critical for the development of novel front passivation approaches: (i) both Cd and Zn impurities beneficially reduce the high native net dopant concentration in the space charge region, (ii) sputter deposition of ZnO damages the passivation layer resulting in increased interface recombination, (iii) thermal treatments of devices with ZnO layer result in substantial Zn diffusion, which can penetrate the full absorber thickness already at moderate temperatures. © 2020, The Author(s).
String structures in driven 3D complex plasma clusters
Creators: name: Wörner, L.
name: Räth, C.
name: Nosenko, V.
name: Zhdanov, S. K.
name: Thomas, H. M.
name: Morfill, G. E.
name: Schablinski, J.
name: Block, D.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: The structure of driven three-dimensional complex plasma clusters was studied experimentally. The clusters consisted of around 60 hollow glass spheres with a diameter of 22 microns that were suspended in a plasma of rf discharge in argon. The particles were confined in a glass box with conductive yet transparent coating on its four side walls, this allowed to manipulate the particle cluster by biasing the confining walls in a certain sequence. In this work, a rotating electric field was used to drive the clusters. Depending on the excitation frequency, the clusters rotated (10^4 - 10^7 times slower than the rotating field) or remained stationary. The cluster structure was neither that of nested spherical shells nor simple chain structure. Strings of various lengths were found consisting of 2 to 5 particles, their spatial and temporal correlations were studied. The results are compared to recent simulations.
Longitudinal viscosity of 2D Yukawa liquids
Creators: name: Feng, Yan
name: Goree, J.
name: Liu, Bin
Publisher: name: arXiv
Year: 2013
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: The longitudinal viscosity $η_l$ is obtained for a two-dimensional (2D) liquid using a Green-Kubo method with a molecular dynamics simulation. The interparticle potential used has the Debye-Hückel or Yukawa form, which models a 2D dusty plasma. The longitudinal $η_l$ and shear $η_s$ viscosities are found to have values that match very closely, with only negligible differences for the entire range of temperatures that is considered. The bulk viscosity $η_b$ is determined to be either negligibly small or not a meaningful transport coefficient, for a 2D Yukawa liquid.
description: 7 pages, 5 figures, in press Phys. Rev. E 2013