cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Thermally driven spontaneous dust accumulation in the inner regions of protoplanetary disks
Creators: name: Kato, Ryo
name: Ueda, Takahiro
name: Okuzumi, Satoshi
Publisher: name: arXiv
Year: 2025
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: In protoplanetary disks, the formation of planetesimals via streaming and/or gravitational instabilities requires regions with a locally enhanced dust-to-gas mass ratio. Conventionally, gas pressure maxima sustained by gas surface density maxima have been considered as the primary cause of such dust accumulation. However, the disk's pressure structure depends not only on gas density but also on the temperature structure, which itself is influenced by the distribution of dust. In this study, we propose a novel mechanism for dust accumulation, which is driven by the coevolution of dust and disk temperature. In the inner disk region where the midplane temperature is primarily determined by the balance between viscous heating and radiative cooling, a perturbation in dust surface density distribution may affect radiative cooling efficiency, potentially producing a local maximum in the temperature and pressure profiles. To test this hypothesis, we perform coupled calculations of dust and disk temperature evolution, incorporating the advection, diffusion, coagulation, and fragmentation of dust particles along with viscous heating, radiative cooling, and radial thermal diffusion. Our results demonstrate that a pressure maximum formed by a perturbation in the dust surface density can spontaneously induce dust accumulation, even in the absence of a gas surface density maximum, under conditions where dust drift is significantly faster than diffusion and the thermal evolution occurs faster than the inward migration of dust. This mechanism requires viscous heating to dominate disk heating, and typically occurs interior to the snow line. In this spontaneous dust trap, the dust-to-gas density ratio at the midplane can exceed unity, suggesting the potential for rocky planetesimal formation via streaming and gravitational instabilities.
description: Accepted for publication in PASJ. 14 pages, 11 figures,
Nonlinear Redshift-Space Distortions on the Full Sky
Creators: name: Dam, Lawrence
name: Bonvin, Camille
Publisher: name: arXiv
Year: 2023
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We derive an analytic expression for the two-point correlation function in redshift space which (i) is nonlinear; (ii) is valid on the full sky, i.e. the distant-observer limit is not assumed; (iii) can account for the effect of magnification and evolution bias due to a non-uniform selection function; and (iv) respects the fact that observations are made on the past lightcone, so naturally yields unequal-time correlations. Our model is based on an exact treatment of the streaming model in the wide-angle regime. Within this general regime, we find that the redshift-space correlation function is essentially determined by a geometric average of its real-space counterpart. We show that the linear expression for the galaxy overdensity, accurate to subleading order, can be recovered from our nonlinear framework. This work is particularly relevant for the modeling of odd multipoles of the correlation function at small separations and low redshifts, where wide-angle effects, selection effects, and nonlinearities are expected to be equally important.
description: 21 pages, 3 figures
Detection of ultra-fast radio bursts from FRB 20121102A
Creators: name: Snelders, M. P.
name: Nimmo, K.
name: Hessels, J. W. T.
name: Bensellam, Z.
name: Zwaan, L. P.
name: Chawla, P.
name: Ould-Boukattine, O. S.
name: Kirsten, F.
name: Faber, J. T.
name: Gajjar, V.
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Fast radio bursts (FRBs) are extragalactic transients with typical durations of milliseconds. FRBs have been shown, however, to fluctuate on a wide range of timescales: some show sub-microsecond sub-bursts while others last up to a few seconds in total. Probing FRBs on a range of timescales is crucial for understanding their emission physics, how to detect them effectively, and how to maximize their utility as astrophysical probes. FRB 20121102A is the first-known repeating FRB source. Here we show that FRB 20121102A is able to produce isolated microsecond-duration bursts whose total durations are more than ten times shorter than all other known FRBs to date. The polarimetric properties of these micro-bursts resemble those of the longer-lasting bursts, suggesting a common emission mechanism producing FRBs spanning a factor of 1,000 in duration. Furthermore, this work shows that there exists a population of ultra-fast radio bursts that current wide-field FRB searches are missing due to insufficient time-resolution. These results indicate that FRBs occur more frequently and with greater diversity than initially thought. This could also influence our understanding of energy, wait time, and burst rate distributions.
description: Published in Nature Astronomy, doi.org/10.1038/s41550-023-02101-x
Citizenship Revocation as a Human Rights Violation: The Case of Shamima Begum
Creators: name: Masters, Mercedes
name: Salvador Santino Jr. Regilme
Publisher: name: figshare
Year: 2020
Subjects: subject: 220104 Human Rights and Justice Issues
subject: FOS: Philosophy, ethics and religion
subject: 180114 Human Rights Law
subject: FOS: Law

description: Is it morally legitimate for a state to revoke the citizenship under certain conditions? Should a state revoke the citizenship of its nationals who joined a publicly known non-state terrorist organisation abroad?
Star formation in high redshift galaxies including Supernova feedback: effect on stellar mass and luminosity functions
Creators: name: Samui, Saumyadip
Publisher: name: arXiv
Year: 2014
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present a semi-analytical model of high redshift galaxy formation. In our model the star formation inside a galaxy is regulated by the feedback from supernova (SNe) driven outflows. We derive a closed analytical form for star formation rate in a single galaxy taking account of the SNe feedback in a self-consistent manner. We show that our model can explain the observed correlation between the stellar mass and the circular velocity of galaxies from dwarf galaxies to massive galaxies of $10^{12} M_\odot$. For small mass dwarf galaxies additional feedback other than supernova feedback is needed to explain the spread in the observational data. Our models reproduce the observed 3-D fundamental correlation between the stellar mass, gas phase metallicity and star formation rate in galaxies establishing that the SNe feedback plays a major role in building this relation. Further, the observed UV luminosity functions of Lyman-Break galaxies (LBGs) are well explained by our feedback induced star formation model for a vast redshift range of $1.5 \le z \le 8$. In particular, the flattening of the luminosity functions at the low luminosity end naturally arises due to our explicit SNe feedback treatment.
description: 21 pages, 7 figures, Accepted for publication in New Astronomy
Die Predigt in der evangelischen Kirche A. C. Österreichs in der Toleranzzeit (1781-1861)
Creators: name: Sakrausky, Oskar
Publisher: name: Lutherische Kirche in der Welt
Year: 1970

description: Lutherische Kirche in der Welt, Bd. 40 (1993): Lutherische Kirche in der Welt, Band 40
Design of a mobile neutron spectrometer for the Laboratori Nazionali del Gran Sasso (LNGS)
Creators: name: Solmaz, Melih
name: Eitel, Klaus
name: Valerius, Kathrin
name: Balzer, Matthias
name: Ferella, Alfredo
name: Pompa, Francesco
name: Pirling, Ulrich
name: Tcherniakhovski, Denis
name: Oberlack, Uwe
name: Wüstling, Sascha
Publisher: name: arXiv
Year: 2023
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Environmental neutrons are a source of background for rare event searches (e.g., dark matter direct detection and neutrinoless double beta decay experiments) taking place in deep underground laboratories. The overwhelming majority of these neutrons are produced in the cavern walls by means of intrinsic radioactivity of the rock and concrete. Their flux and spectrum depend on time and location. Precise knowledge of this background is necessary to devise sufficient shielding and veto mechanisms, improving the sensitivity of the neutron-susceptible underground experiments. In this report, we present the design and the expected performance of a mobile neutron detector for the LNGS underground laboratory. The detector is based on capture-gated spectroscopy technique and comprises essentially a stack of plastic scintillator bars wrapped by gadolinium foils. The extensive simulation studies demonstrate that the detector will be capable of measuring ambient neutrons at low flux levels ($\sim$$10^{-6}\,\mathrm{n/cm^2/s}$) at LNGS, where the ambient gamma flux is by about 5 orders of magnitude larger.
description: Published at JINST
Spin and charge ordering in three-leg ladders in oxyborates
Creators: name: Vallejo, E.
name: Avignon, M.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study the spin ordering within the 3-leg ladders present in the oxyborate Fe(3)O(2)BO(3) consisting of localized classical spins interacting with conduction electrons (one electron per rung). We also consider the competition with antiferromagnetic superexchange interactions to determine the magnetic phase diagram. Beside a ferromagnetic phase we find (i) a phase with ferromagnetic rungs ordered antiferromagnetically (ii) a zig-zag canted spin ordering along the legs. We also determine the induced charge ordering within the different phases and the interplay with lattice instability. Our model is discussed in connection with the lattice dimerization transition observed in this system, emphasizing on the role of the magnetic structure.
Three-body force effect on neutrino emissivities of neutron stars within the framework of the Brueckner-Hartree-Fock approach
Creators: name: Yin, Peng
name: Zuo, Wei
Publisher: name: arXiv
Year: 2013
Subjects: subject: Nuclear Theory (nucl-th)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The three-body force (TBF) effect on the neutrino emissivity in neutron star matter and the total neutrino emissivity of neutron stars have been investigated within the framework of the Brueckner-Hartree-Fock approach by adopting the AV18 two-body interaction plus a microscopic TBF. The neutrino emissivity from the direct Urca process turns out to be much larger than that from the modified Urca process. Inclusion of the TBF reduces strongly the density thresholds of the direct Urca processes involving electrons and muons. The TBF effect on the total neutrino emissivity of neutron stars is shown to be negligibly weak for neutron stars with small masses. For neutron stars with large masses, the TBF effect becomes visible and inclusion of the TBF may enhance the total neutrino emissivity by about 50% for neutron stars with a given mass of $M=1.6M_{\odot}$.
description: 7 pages, 3 figures
title: Актуальные вопросы современности
Creators: name: Новгородский государственный университет имени Ярослава Мудрого (НовГУ)
Publisher: name: Новгородский государственный университет имени Ярослава Мудрого (НовГУ)
Year: 2020

description: В настоящем сборнике опубликованы статьи студентов высшего и среднего профессионального образования по материалам Всероссийской научно-практической студенческой конференции с международным участием, организатором которой выступил Гуманитарно-экономический колледж Новгородского государственного университета имени  Ярослава Мудрого. Авторами рассматриваются актуальные проблемы правовой системы, ряд исследований посвящены развитию сферы образования и туризма, кроме того, проанализировано состояние современной экономики и финансово-кредитной деятельности.
Все статьи прошли обязательное рецензирование и проверку на оригинальность текста. Мнение редакции может не совпадать с мнением авторов материалов.
Geodesics motion of test particles around Schwarzschild-Klinkhamer wormhole with topological defects and gravitational lensing
Creators: name: Ahmed, Faizuddin
Publisher: name: arXiv
Year: 2023
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: This study investigates the geodesic motion of test particles, both massless and massive, within a Schwarzschild-Klinkhamer (SK) wormhole space-time. We specifically consider the influence of cosmic strings on the system and analyze the effective potential, and observing that the presence of a cosmic string parameter alters it for null and time-like geodesics. Moreover, we calculate the deflection angle for null geodesics, and demonstrate that the cosmic string modifies this angle and induces a shift in the results. Additionally, we extend our investigation in this SK-wormhole space-time but with a global monopole. We explore the geodesic motion of test particles in this scenario and find that the effective potential is affected by the global monopole. Similarly, we determine the deflection angle for null geodesics and show that the global monopole parameter introduces modifications to this angle. Lastly, we present several known solutions for space-times involving cosmic strings and global monopoles within the framework of this SK-wormhole.
description: 23 pages, 8 figures, published in Journal of Cosmology and Astroparticle Physics (https://doi.org/10.1088/1475-7516/2023/11/010)
Compost production for sustainable sanitation service delivery - Business Model 14
Creators: name: Otoo, Miriam
name: Hanjra, Munir A.
name: Otoo, Miriam
name: Hanjra, Munir A.
Publisher: name: Unknown
Year: 2018
Subjects: subject: Agribusiness
subject: Financial Economics
subject: Public Economics
subject: Risk and Uncertainty
subject: Waste management
subject: Composting
subject: Sanitation
subject: Sustainability
subject: Business models
subject: Supply chains
subject: Organic fertilizers
subject: Risk reduction

description: In Otoo, Miriam; Drechsel, Pay (Eds.). Resource recovery from waste: business models for energy, nutrient and water reuse in low- and middle-income countries. Oxon, UK: Routledge - Earthscan
A Wigner distribution function for finite oscillator systems
Creators: name: Van der Jeugt, Joris
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: 81P16, 81S30

description: We define a Wigner distribution function for a one-dimensional finite quantum system, in which the position and momentum operators have a finite (multiplicity-free) spectrum. The distribution function is thus defined on discrete phase-space, i.e. on a finite discrete square grid. These discrete Wigner functions possess a number of properties similar to the Wigner function for a continuous quantum system such as the quantum harmonic oscillator. As an example, we consider the so-called su(2) oscillator model in dimension 2j+1, which is known to tend to the canonical oscillator when j tends to infinity. In particular, we compare plots of our discrete Wigner functions for the su(2) oscillator with the well known plots of Wigner functions for the canonical quantum oscillator. This comparison supports our approach to discrete Wigner functions.
Electrophoresis of ions and electrolyte conductivity: from bulk to nanochannels
Creators: name: Vinogradova, Olga I.
name: Silkina, Elena F.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Chemical Physics (physics.chem-ph)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: When electrolyte solutions are confined in micro- and nanochannels their conductivity is significantly different from those in a bulk phase. Here we revisit the theory of this phenomenon by focusing attention on the reduction in the ion mobility with the concentration of salt and a consequent impact to the conductivity of a monovalent solution, from bulk to confined in a narrow slit. We first give a systematic treatment of electrophoresis of ions and obtain equations for their zeta potentials and mobilities. The latter are then used to obtain a simple expression for a bulk conductivity, which is valid in a concentration range up to a few molars and more accurate than prior analytic theories. By extending the formalism to the electrolyte solution in the charged channel the equations describing the conductivity in different modes are presented. They can be regarded as a generalization of prior work on the channel conductivity to a more realistic case of a nonzero reduction of the zeta potential and electrophoretic mobility of ions with salt concentration. Our analysis provides a framework for interpreting measurements on the conductivity of electrolyte solutions in the bulk and in narrow channels.
CИСТЕМА МЕТОДОВ ВЫБОРА МЕСТА РАЗМЕЩЕНИЯ ЛОГИСТИЧЕСКОГО РАСПРЕДЕЛИТЕЛЬНОГО ЦЕНТРА
Creators: name: Kaygorodtsev, Artem
Publisher: name: figshare
Year: 2020
Subjects: subject: 150309 Logistics and Supply Chain Management
subject: FOS: Economics and business

description: An approach to the choice of the location
of a logistics distribution center
is described, based on a combination
of the proposed system of factors with
the method of analysis of hierarchies
and simulation
Szeressauer. Halt Studio! komm mit! Student. Ich bitte, ich bin eigentlich Handlungsdiener, aber als Hörer der commerciellen Abteilung. Szeressauer. Ach was! Student doch! Student. Erlauben Sie, dass sich Ihnen meine Zeugnisse vorlege, da werden Sie gleich sehen, dass ich nie etwas studiert habe.; [1848]
Creators: name: (:Unav)
Publisher: name: Universitätsbibliothek der Ludwig-Maximilians-Universität München
Year: 2018

description: Zählung: VII / 1
(Nicht-)Arbeit und ihre Rechtfertigungsnarrative in Robert Walsers 'Helbling'-Komplex und 'Jakob von Gunten'
Creators: name: Meurer, Jonas
Publisher: name: figshare
Year: 2022
Subjects: subject: Literature
subject: Philosophy
subject: FOS: Philosophy, ethics and religion
subject: Sociology
subject: FOS: Sociology

description: Dieser Text beruht beruht auf meiner Bachelorarbeit, die ich im Sommersemester 2016 an der Otto-Friedrich-Universität Bamberg vorgelegt habe. Thematisiert werden die Rechtfertigungsnarrative (der Ausrede, des Tagebuchschreibens und der Autobiographie), mit denen in Texten Robert Walsers (Helbling, Helblings Geschichte, Ein Vormittag, Jakob von Gunten) von (Nicht-)Arbeit erzählt wird. Dabei wird deutlich, dass bei Walser Ethik und Ästhetik eine komplexe Verbindung eingehen.
Remotely sensed transport in microwave photoexcited GaAs/AlGaAs two-dimensional electron system
Creators: name: Ye, Tianyu
name: Mani, Ramesh
name: Wegscheider, Werner
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We demonstrate a strong correlation between the magnetoresistive and the concurrent microwave reflection from the microwave photo-excited GaAs/AlGaAs two-dimensional electron system (2DES). These correlations are followed as a function of the microwave power, the microwave frequency, and the applied current. Notably, the character of the reflection signal remains unchanged even when the current is switched off in the GaAs/AlGaAs Hall bar specimen. The results suggest a perceptible microwave-induced change in the electronic properties of the 2DES, even in the absence of an applied current.
Probing The Early Universe Cosmology With NANOGrav: Possibilities and Limitations
Creators: name: Ben-Dayan, Ido
name: Kumar, Utkarsh
name: Thattarampilly, Udaykrishna
name: Verma, Amresh
Publisher: name: arXiv
Year: 2023
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: A stochastic gravitational wave background is a prediction of a number of astrophysical and cosmological phenomena including early Universe Cosmology. Recently, the NANOGrav Collaboration reported conclusive evidence for a stochastic gravitational-wave background. We analyze the NANOGrav signal assuming it is of primordial origin including the reheating phase. We use the latest measurements from NANOGrav to constrain the Universe's reheating equation of state $w_{re}$ the reheating temperature, $T_{re}$, the tensor to scalar ratio $r$, and the tensor tilt $n_t$. Assuming the constant equation of state $w_{re}$ responsible for reheating phase, we find preference for instant reheating, $w_{re} = 0.36^{+0.15}_{-0.28}$, and a very blue tilt $n_t = 1.94^{+0.43}_{-0.88}$. We find a degeneracy between the tensor to scalar ratio $r$ and $T_{re}$ and suggest ways to break this degeneracy. In all cases where the reheating temperature is constrained, it is constrained to be very low with $T_{re}\leq 10^5 GeV$. We further find that a scale-invariant spectrum as suggested by inflation implies a stiff equation of state $w_{re}=19/3$. If extrapolated, the blue-tilted primordial spectrum that agrees with the NANOGrav signal at corresponding frequencies is incompatible with the LIGO bound. This incompatibility is another challenge for connecting NANOGrav with the primordial spectrum. We discuss a number of ways to circumvent this issue. We split the spectrum into a sum of astrophysical and primordial spectra and constrain the astrophysical and primordial components using NANOGrav data and the LIGO bound. In another attempt, we use the same data and constrain the running of the spectrum. Any of these or a combination of such methods can be used to reconcile the NANOGrav data and the LIGO bound with the primordial power spectrum.
description: 13 pages, 5 figures, 3 tables, reference added, figure changed
Quantum spin liquid with a Majorana Fermi surface on the three-dimensional hyperoctagon lattice
Creators: name: Hermanns, M.
name: Trebst, S.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Motivated by the recent synthesis of $β$-Li$_2$IrO$_3$ -- a spin-orbit entangled $j=1/2$ Mott insulator with a three-dimensional lattice structure of the Ir$^{4+}$ ions -- we consider generalizations of the Kitaev model believed to capture some of the microscopic interactions between the Iridium moments on various trivalent lattice structures in three spatial dimensions. Of particular interest is the so-called hyperoctagon lattice -- the premedial lattice of the hyperkagome lattice, for which the ground state is a gapless quantum spin liquid where the gapless Majorana modes form an extended two-dimensional Majorana Fermi surface. We demonstrate that this Majorana Fermi surface is inherently protected by lattice symmetries and discuss possible instabilities. We thus provide the first example of an analytically tractable microscopic model of interacting SU(2) spin-1/2 degrees of freedom in three spatial dimensions that harbors a spin liquid with a two-dimensional spinon Fermi surface.
(Nicht-)Arbeit und ihre Rechtfertigungsnarrative in Robert Walsers 'Helbling'-Komplex und 'Jakob von Gunten'
Creators: name: Meurer, Jonas
Publisher: name: figshare
Year: 2016
Subjects: subject: Literature
subject: Philosophy
subject: FOS: Philosophy, ethics and religion
subject: Sociology
subject: FOS: Sociology

description: Dieser Text beruht beruht auf meiner Bachelorarbeit, die ich im Sommersemester 2016 an der Otto-Friedrich-Universität Bamberg vorgelegt habe und die mit 1,0 bewertet wurde.

Abstract: Es wird versucht, das am Frankfurter Exzellenzcluster Die Herausbildung normativer Ordnungen entwickelte Konzept des Rechtfertigungsnarrativs für die Literaturwissenschaft nutzbar zu machen, indem Erzähltexte Robert Walsers (Helbling, Helblings Geschichte, Ein Vormittag, Jakob von Gunten) daraufhin analysiert werden, mit Hilfe welcher Rechtfertigungsnarrative in ihnen von (Nicht-)Arbeit erzählt wird. Es wird deutlich, dass bei Walser Ethik und Ästhetik eine komplexe Verbindung eingehen: Arbeit und ihre Gegenspielerinnen werden einerseits durch je spezifische Rechtfertigungsnarrative (die der Ausrede, des Tagebuchschreibens und der Autobiographie) im ‚Raum der Gründe‘ verortet, andererseits führen die Texte diesen Rechtfertigungsdiskurs immer wieder aufs Glatteis und behaupten so ihre literarische Autonomie. Moralisch eindeutige Ratschläge sind dadurch bei Walser zwar schlussendlich nicht zu haben, sehr wohl aber Sensibilisierungen für die Kontingenz sozialer Ordnungen und die "Weltoffenheit" (Max Scheler) des Menschen.
Coherence properties of cycling chaos
Creators: name: Levanova, T. A.
name: Osipov, G. V.
name: Pikovsky, A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences
subject: 65P20

description: Cycling chaos is a heteroclinic connection between several chaotic attractors, at which switching between the chaotic sets occur at growing time intervals. Here we characterize the coherence properties of these switchings, considering nearly periodic regimes that appear close to the cycling chaos due to imperfections or to instability. Using numerical simulations of coupled Lorenz, Roessler, and logistic map models, we show that the coherence is high in the case of imperfection (so that asymptotically the cycling chaos is very regular), while it is low close to instability of the cycling chaos.
description: 9 pages, 5 figures
Majorana bound states in d-wave superconductor planar Josephson junction
Creators: name: Vakili, Hamed
name: Ali, Moaz
name: Elekhtiar, Mohamed
name: Kovalev, Alexey A.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study phase-controlled planar Josephson junctions comprising a two-dimensional electron gas with strong spin-orbit coupling and d-wave superconductors, which have an advantage of high critical temperature. We show that a region between the two superconductors can be tuned into a topological state by the in-plane Zeeman field, and can host Majorana bound states. The phase diagram as a function of the Zeeman field, chemical potential, and the phase difference between superconductors exhibits the appearance of Majorana bound states for a wide range of parameters. We further investigate the behavior of the topological gap and its dependence on the type of d-wave pairing, i.e., d, d+is, or d+id', and note the difficulties that can arise due to the presence of gapless excitations in pure d-wave superconductors. On the other hand, the planar Josephson junctions based on superconductors with d+is and d+id' pairings can potentially lead to realizations of Majorana bound states. Our proposal can be realized in cuprate superconductors, e.g., in a twisted bilayer, combined with the layered semiconductor Bi2O2Se.
description: 4 pages, 4 figures
Ridges in rotating neutron-star properties due to first order phase transitions
Creators: name: Moreno, Pablo Navarro
name: Llanes-Estrada, Felipe J.
name: Lope-Oter, Eva
Publisher: name: arXiv
Year: 2023
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We identify combinations of observables for rotating neutron stars that can one day bear on the question of whether there can be first order phase transitions in the neutron matter therein. We employ the Hartle-Thorne theory for stationary, rotating neutron stars at conventional angular velocities (in the pulsar and millisecond pulsar ranges) and extract three-dimensional sections of the ellipticity or the dynamical angular momentum as function of the star's mass and angular velocity. An eventual first order phase transition in the equation of state (EoS) leaves a clear ridge (nonanalyticity) in these observables, akin to the sudden kink in popular mass-radius diagrams for static stars. Finally, we observe that static neutron stars in General Relativity (GR) will fail to be compact enough for the light ring's position at r=3M to be outside the star, except for the most extreme equations of state. The outer light ring of a rotating star might however be formed unless the EoS softens too much, and its eventual detection can then be used to constrain the EoS (or the gravity theory).
description: 17 pages, 26 plots, thoroughly revised following refereeing
Best_Practices_in_Laxmibai_Sitaram_Halbe.pdf
Creators: name: Ramkisan More
Publisher: name: figshare
Year: 2020
Subjects: subject: Library and Information Studies
subject: FOS: Media and communications

description: The role of library and information centers has become most important in today’s era. Library is a heart of any institution. Academic libraries are changing themselves to cope with the technologies. In this paper author has discussed on best practices adopted by Laxmibai Sitaram Halbe College Library
Die Gründung der Deutschen Evangelischen Gemeinde A. B. in Prag und ihre weiteren Schicksale
Creators: name: Sakrausky, Oskar
Publisher: name: Lutherische Kirche in der Welt
Year: 1970

description: Lutherische Kirche in der Welt, Bd. 39 (1992): Lutherische Kirche in der Welt, Band 39
Seismic investigation of the γ Dor star KIC 6462033: The first results of Kepler and ground-based follow up observations
Creators: name: Ulusoy, C.
name: Ulaş, B.
name: Damasso, M.
name: Carbognani, A.
name: Cenadelli, D.
name: Stateva, I.
name: Iliev, I. Kh.
name: Dimitrov, D.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present the first preliminary results on the analysis of ground-based time series of the γ Dor star KIC 6462033 (TYC 3144-646-1, V = 10.83, P = 0.69686 d) as well as Kepler photometry in order to study pulsational behaviour in this star.γ Dor variables, which exhibit g-mode pulsations, are promising asteroseismic targets to understand their rich complexity of pulsational characteristics in detail. In order to achieve this goal, intensive and numerous multicolour and high resolution spectroscopic observations are also required, to complete space-based data aimed at the determination of their physical parameters.
description: 2 pages, 2 figures. To be published in proceedings of IAU Symposium 301, Precision Asteroseismology, August 2013, Wroc{\l}aw, Poland
Reconstruction of the quasinormal spectrum from pole-skipping
Creators: name: Grozdanov, Sašo
name: Lemut, Timotej
name: Pedraza, Juan F.
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: The holographic gauge/gravity duality provides an explicit reduction of quantum field theory (QFT) calculations in the semi-classical large-$N$ limit to sets of `gravitational' differential equations whose analysis can reveal all details of the spectra of thermal QFT correlators. We argue that in certain cases, a complete reconstruction of the spectrum and of the corresponding correlator is possible from only the knowledge of an infinite, discrete set of pole-skipping points traversed by a single (hydrodynamic) mode computed in a series expansion in an inverse number of spacetime dimensions. Conceptually, this reduces the computation of a QFT correlator spectrum to performing a set of purely algebraic manipulations. With the help of the pole-skipping analysis, we also uncover a novel structure underpinning the coefficients that enter the hydrodynamic dispersion relations.
description: 10 pages, 1 figure
A public-private partnership linking wastewater treatment and aquaculture (Ghana) - Case Study
Creators: name: Amoah, Philip
name: Muspratt, A.
name: Drechsel, Pay
name: Otoo, Miriam
name: Amoah, Philip
name: Muspratt, A.
name: Drechsel, Pay
name: Otoo, Miriam
Publisher: name: Unknown
Year: 2018
Subjects: subject: Agribusiness
subject: Environmental Economics and Policy
subject: Marketing
subject: FOS: Economics and business
subject: Public Economics
subject: Public-private cooperation
subject: Partnerships
subject: Wastewater treatment
subject: Aquaculture
subject: Municipal wastes
subject: Sanitation
subject: Wastewater treatment plants
subject: Fish culture
subject: Market economies
subject: Business models
subject: Business enterprises
subject: Supply chains
subject: Socioeconomic environment
subject: Case studies
subject: Kumasi
subject: Ghana

description: In Otoo, Miriam; Drechsel, Pay (Eds.). Resource recovery from waste: business models for energy, nutrient and water reuse in low- and middle-income countries. Oxon, UK: Routledge - Earthscan
ManiVault: A Flexible and Extensible Visual Analytics Framework for High-Dimensional Data
Creators: name: Vieth, Alexander
name: Kroes, Thomas
name: Thijssen, Julian
name: van Lew, Baldur
name: Eggermont, Jeroen
name: Basu, Soumyadeep
name: Eisemann, Elmar
name: Vilanova, Anna
name: Höllt, Thomas
name: Lelieveldt, Boudewijn
Publisher: name: arXiv
Year: 2023
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: Graphics (cs.GR)
subject: FOS: Computer and information sciences

description: Exploration and analysis of high-dimensional data are important tasks in many fields that produce large and complex data, like the financial sector, systems biology, or cultural heritage. Tailor-made visual analytics software is developed for each specific application, limiting their applicability in other fields. However, as diverse as these fields are, their characteristics and requirements for data analysis are conceptually similar. Many applications share abstract tasks and data types and are often constructed with similar building blocks. Developing such applications, even when based mostly on existing building blocks, requires significant engineering efforts. We developed ManiVault, a flexible and extensible open-source visual analytics framework for analyzing high-dimensional data. The primary objective of ManiVault is to facilitate rapid prototyping of visual analytics workflows for visualization software developers and practitioners alike. ManiVault is built using a plugin-based architecture that offers easy extensibility. While our architecture deliberately keeps plugins self-contained, to guarantee maximum flexibility and re-usability, we have designed and implemented a messaging API for tight integration and linking of modules to support common visual analytics design patterns. We provide several visualization and analytics plugins, and ManiVault's API makes the integration of new plugins easy for developers. ManiVault facilitates the distribution of visualization and analysis pipelines and results for practitioners through saving and reproducing complete application states. As such, ManiVault can be used as a communication tool among researchers to discuss workflows and results. A copy of this paper and all supplemental material is available at https://osf.io/9k6jw and source code at https://github.com/ManiVaultStudio.
description: 11 pages paper (incl. 2 pages references and acknowledgements), 2 pages supplement
Ein unbekannter Brief von Mátyás Devai?
Creators: name: Dévai, Matthias
name: Ritoók-Szalay, Agnes
name: Melanchthon, Philipp
Publisher: name: Lutherische Kirche in der Welt
Year: 1970

description: Lutherische Kirche in der Welt, Bd. 39 (1992): Lutherische Kirche in der Welt, Band 39
Proximity effect in superconductor/conical magnet/ferromagnet heterostructures
Creators: name: Fritsch, Daniel
name: Annett, James F.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: At the interface between a superconductor and a ferromagnetic metal spin-singlet Cooper pairs can penetrate into the ferromagnetic part of the heterostructure with an oscillating and decaying spin-singlet Cooper pair density. However, if the interface allows for a spin-mixing effect, equal-spin spin-triplet Cooper pairs can be generated that can penetrate much further into the ferromagnetic part of the heterostructure, known as the long-range proximity effect. Here, we present results of spin-mixing based on self-consistent solutions of the microscopic Bogoliubov-de Gennes equations incorporating a tight-binding model. In particular, we include a conical magnet into our model heterostructure to generate the spin-triplet Cooper pairs and analyse the influence of conical and ferromagnetic layer thickness on the unequal-spin and equal-spin spin-triplet pairing correlations. It will be show that, in agreement with experimental observations, a minimum thickness of the conical magnet is necessary to generate a sufficient amount of equal-spin spin-triplet Cooper pairs allowing for the long-range proximity effect.
description: 14 pages, 7 figures, 1 table
sustainable future for small-scale farming?
Creators: name: Binetsch, Jonathan
name: Bun, Hikari
name: Hernández Westpfahl, Rafael
name: Krug, Jana
name: Lehmann, Rosa
name: Sulca Bravo, Eva
name: Walter, Caroline
name: Weise, Teresa
Publisher: name: HCIAS Working Papers on Ibero-America
Year: 2023

description: There is a great deal of agreement amongst farmers, environmentalists, scholars, and policy-makers that the current agri-food-system is unsustainable. Debates about the future of an agriculture that can cope with the challenges of climate change and at the same time feed many people well revolve, among other things, around a digitalization of agriculture, but also around alternative agricultural practices and sciences. Agroecology represents one such alternative. However, in view of the processes toward digitized agriculture, the question arises as to whether digitization and agroecology are compatible. This working paper approaches this question from the perspective of environmental and development NGO activists as well as academics researching these topics. Based on qualitative interviews, the paper shows the multiple challenges and partly diverging perspectives on (possible) costs and benefits of digitization for agroecological practices and those who practice them.
description: HCIAS Working Papers on Ibero-America, HCIAS Working Papers on Ibero-America, Volume II (2023)
Spin exchange dynamics in 4H SiC monocrystals with different nitrogen donor concentrations
Creators: name: Holiatkina, M.
name: Pöppl, A.
name: Kalabukhova, E.
name: Lančok, J.
name: Savchenko, D.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: 4H silicon carbide (SiC) polytype is preferred over other SiC polytypes for high-power, high-voltage, and high-frequency applications due to its superior electrical, thermal, and structural characteristics. In this manuscript, we provide a comprehensive study of the spin coupling dynamic between conduction electrons and nitrogen (N) donors in monocrystalline 4H SiC with various concentrations of uncompensated N donors from 10^17 cm^-3 to 5x10^19 cm^-3 by continuous wave, pulsed EPR, and microwave perturbation techniques at T=4.2-300 K. At low temperatures two triplets due to N donors in cubic (Nk) hexagonal (Nh) positions and triplet arisen from spin-interaction between Nh and Nk were observed in 4H SiC having Nd-Na=10^17 cm^-3. A single S-line (S=1/2) dominates the EPR spectra in all investigated 4H SiC monocrystals at high temperatures. It was established that this line occurs due to the exchange coupling of localized electrons (dominate at low temperatures) and non-localized electrons (dominate at high temperatures). The localized electrons were attributed to Nh for Nd-Na=10^17 cm^-3 and Nk donors for Nd-Na>=5x10^18 cm^-3. We have concluded that the conduction electrons in 4H SiC monocrystals are characterized by gpar=2.0053(3) gper=2.0011(3) for Nd-Na<=5x10^18 cm^-3 and gpar=2.0057(3) and gper=2.0019(3) for Nd-Na=5x10^19 cm^-3. Using the theoretical fitting of the temperature variation of S-line EPR linewidth in 4H SiC having Nd-Na<5x10^18 cm-^3, the energy levels of 57-65 meV that correlate with the valley-orbit splitting values for Nk donors in 4H SiC monocrystals were obtained.
Wai! Standrecht! - wenn ich nicht abliefer die Waffes - wollen sie mich machen capores - hab ich sie doch gekauft für meine theures Geld von de Proletaringer - hab ich doch nicht wollen kämpfen mit den Waffen, hätt ich sie verspeditirt an die Ungarn, und von die Ungarn hätt sie doch wieder genommen das Militär - zu was a Standrecht?!; [1848]
Creators: name: (:Unav)
Publisher: name: Universitätsbibliothek der Ludwig-Maximilians-Universität München
Year: 2018

description: Zählung: VII / 5
A clarification on prevailing misconceptions in unimodular gravity
Creators: name: Bengochea, Gabriel R.
name: Leon, Gabriel
name: Perez, Alejandro
name: Sudarsky, Daniel
Publisher: name: arXiv
Year: 2023
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The traditional presentation of Unimodular Gravity (UG) consists on indicating that it is an alternative theory of gravity that restricts the generic diffeomorphism invariance of General Relativity. In particular, as often encountered in the literature, unlike General Relativity, Unimodular Gravity is invariant solely under volume-preserving diffeomorphisms. That characterization of UG has led to some confusion and incorrect statements in various treatments on the subject. For instance, sometimes it is claimed (mistakenly) that only spacetime metrics such that $|$det $g_{μν}| = 1$ can be considered as valid solutions of the theory. Additionally, that same (incorrect) statement is often invoked to argue that some particular gauges (e.g. the Newtonian or synchronous gauge) are not allowed when dealing with cosmological perturbation theory in UG. The present article is devoted to clarify those and other misconceptions regarding the notion of diffeomorphism invariance, in general, and its usage in the context of UG, in particular.
description: 26 pages, 2 figures, references updated. Version accepted for publication
Decay Constants of Heavy Pseudoscalar Mesons: Reconciling QCD Sum Rules and Lattice QCD
Creators: name: Lucha, Wolfgang
name: Melikhov, Dmitri
name: Simula, Silvano
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Lattice (hep-lat)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Exploiting recently proposed novel improvements of the techniques used for extracting from QCD sum rules pivotal hadron characteristics, including their systematic errors, we succeed to achieve a conspicuous agreement of the predictions of QCD sum rules for the decay constants $f_B$ and $f_{B_s}$ of the heavy pseudoscalar mesons $B$ and $B_s,$ which before tended to be slightly too large, with corresponding results from lattice QCD. Adopting for the crucial $b$-quark $\bar{\rm MS}$ mass the value $\bar{m}_b(\bar{m}_b)=(4.247\pm0.034)$ GeV, we get $f_B=(192.0\pm14.6)$ MeV and $f_{B_s}=(228.0\pm19.8)$ MeV; clearly, this may be also viewed as a determination of the $b$-quark mass from sufficiently precise decay constants.
description: 2 pages, 2 figures, contributed to the European Physical Society Conference on High Energy Physics - EPS-HEP2013, 18-24 July 2013, Stockholm, Sweden
Summing over trajectories of stochastic dynamics with multiplicative noise
Creators: name: Tang, Ying
name: Yuan, Ruoshi
name: Ao, Ping
Publisher: name: arXiv
Year: 2014
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We demonstrate that the conventional path integral formulations generate inconsistent results exemplified by the geometric Brownian motion under the general stochastic interpretation. We thus develop a novel path integral formulation for the overdamped Langevin equation with the multiplicative noise. The present path integral leads to the corresponding Fokker-Planck equation, and naturally gives a normalized transition probability consistently in examples for general stochastic interpretations. Our result can be applied to study the fluctuation theorems and numerical calculations based on the path integral framework.
description: 7 pages, 1 figure
Asteroseismic Investigation of two Algol-type systems V1241 Tau and GQ Dra
Creators: name: Ulaş, Burak
name: Ulusoy, Ceren
name: Gazeas, Kosmas
name: Erkan, Naci
name: Liakos, Alexios
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present new photometric observations of eclipsing binary systems V1241 Tau and GQ Dra. We use the following methodology: Initially, WD code is applied to the light curves, in order to determine the photometric elements of the systems. Then the residuals are analysed using Fourier Transformation techniques. The results show that one frequency can be barely attributed to the residual light variation of V1241 Tau, while there is no evidence of pulsation on the light curve of GQ Dra.
description: 2 pages, 1 figure: To be published in proceedings of IAU Symposium 301, Precision Asteroseismology, August 2013, Wroc{\l}aw, Poland
Hysteretic electrical transport in BaTiO$_3$/Ba$_{1-x}$Sr$_x$TiO$_3$/Ge heterostructures
Creators: name: Ngai, J. H.
name: Kumah, D. P.
name: Ahn, C. H.
name: Walker, F. J.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We present electrical transport measurements of heterostructures comprised of BaTiO$_3$ and Ba$_{1-x}$Sr$_x$TiO$_3$ epitaxially grown on Ge. The Sr-alloying imparts compressive strain to the BaTiO$_3$, which enables the thermal expansion mismatch between BaTiO$_3$ and Ge to be overcome to achieve $c$-axis oriented growth. The conduction bands of BaTiO$_3$ and Ba$_{1-x}$Sr$_x$TiO$_3$ are nearly aligned with the conduction band of Ge, which facilitates electron transport. Electrical transport measurements through the dielectric stack exhibit rectifying behavior and hysteresis, where the latter is consistent with ferroelectric switching.