cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The bright optical flash from GRB 060117
Creators: name: Jelínek, Martin
name: Prouza, Michael
name: Kubánek, Petr
name: Hudec, René
name: Nekola, Martin
name: Řídký, Jan
name: Grygar, Jiří
name: Boháčová, Martina
name: Castro-Tirado, Alberto J.
name: Gorosabel, Javier
name: Hrabovský, Miroslav
name: Mandát, Dušan
name: Nosek, Dalibor
name: Nožka, Libor
name: Palatka, Miroslav
name: Pandey, Shashi B.
name: Pech, Miroslav
name: Schovánek, Petr
name: Šmída, Radomír
name: Trávníček, Petr
name: Postigo, Antonio de Ugarte
name: Vítek, Stanislav
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present a discovery and observation of an extraordinarily bright prompt optical emission of the GRB 060117 obtained by a wide-field camera atop the robotic telescope FRAM of the Pierre Auger Observatory from 2 to 10 minutes after the GRB. We found rapid average temporal flux decay of alpha = -1.7 +- 0.1 and a peak brightness R = 10.1 mag. Later observations by other instruments set a strong limit on the optical and radio transient fluxes, unveiling an unexpectedly rapid further decay. We present an interpretation featuring a relatively steep electron-distribution parameter p ~ 3.0 and providing a straightforward solution for the overall fast decay of this optical transient as a transition between reverse and forward shock.
description: Accepted to A&A, 4 pages, corected few typos pointed out by X.F. Wu
title: Absorption der Impakt-Energie durch Zwischenschichten aus Gummi
Creators: name: Karl, Janis Alexander
Publisher: name: UNSPECIFIED
Year: 2022

description: Diese Arbeit beschäftigt sich mit der Entwicklung einer Elastomerformulierung zum Einsatz in ballistischen Panzerungen für Zivilfahrzeuge. Der Fokus wurde auf die Untersuchung der Temperatur- und Frequenzabhängigkeit der viskoelastischen Eigenschaften gelegt, um so die ballistische Schutzwirkung des Elastomers zu optimieren. Hierzu wurden sowohl mechanische, als auch ballistische Analysemethoden eingesetzt. Mit den erhaltenen Ergebnissen konnten Rückschlüsse auf Struktur-Eigenschafts-Beziehungen gezogen werden.
Casimir effect for fermion condensate in conical rings
Creators: name: Saharian, A. A.
name: Petrosyan, T. A.
name: Hovhannisyan, A. A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The fermion condensate (FC) is investigated for a (2+1)-dimensional massive fermionic field confined on a truncated cone with an arbitrary planar angle deficit and threaded by a magnetic flux. Different combinations of the boundary conditions are imposed on the edges of the cone. They include the bag boundary condition as a special case. By using the generalized Abel-Plana-type summation formula for the series over the eigenvalues of the radial quantum number, the edge-induced contributions in the FC are explicitly extracted. The FC is an even periodic function of the magnetic flux with the period equal to the flux quantum. Depending on the boundary conditions, the condensate can be either positive or negative. For a massless field the FC in the boundary-free conical geometry vanishes and the nonzero contributions are purely edge-induced effects. This provides a mechanism for time-reversal symmetry breaking in the absence of magnetic fields. Combining the results for the fields corresponding to two inequivalent irreducible representations of the Clifford algebra, the FC is investigated in the parity and time-reversal symmetric fermionic models and applications are discussed for graphitic cones.
description: 23 pages, 5 figures, Discussion and references added
Χωροθέτηση χερσαίων αιολικών εγκαταστάσεων. Η μελέτη περίπτωσης της Π.Ε. Μαγνησίας
Creators: name: Κουρουμπλής, Απόστολος Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: Ανανεώσιμες Πηγές Ενέργειας
Αιολική ενέργεια
Ζώνες ασυμβατότητας
Renewable Energy Sources
Wind energy
Incompatibility areas

description: Η αιολική ενέργεια αποτελεί σήμερα μια ελκυστική λύση στο πρόβλημα της ηλεκτροπαραγωγής. Η ενέργεια που χρησιμοποιείται είναι άφθονη, αποκεντρωμένη και δωρεάν. Δεν εκλύονται αέρια θερμοκηπίου και άλλοι ρύποι, και οι επιπτώσεις στο περιβάλλον είναι μικρές σε σύγκριση με τα εργοστάσια ηλεκτροπαραγωγής από συμβατικά καύσιμα. Επίσης, τα οικονομικά οφέλη μιας περιοχής από την ανάπτυξη της αιολικής βιομηχανίας είναι αξιοσημείωτα. Για αυτούς του λόγους διερευνήθηκε στην παρούσα εργασία το αν υπάρχουν οι κατάλληλοι χώροι σχετικά με την χωροθέτηση χερσαίων αιολικών εγκαταστάσεων στην περιφερειακή ενότητα Μαγνησίας με την βοήθεια των Γεωγραφικών Συστημάτων Πληροφοριών (ΓΣΠ). Για την εύρεση των χώρων αυτών αποκλείονται περιοχές οι οποίες καθορίζονται από το Ειδικό Πλαίσιο Χωροταξικού Σχεδιασμού και Αειφόρου Ανάπτυξης των ΑΠΕ, το αρμόδιο δηλαδή θεσμικό πλαίσιο, και από την διεθνή βιβλιογραφία, για τα όποια κενά υφίστανται σε αυτό. Τα αποτελέσματα έπειτα από την εφαρμογή των κριτηρίων, έδειξαν ότι οι διαθέσιμες περιοχές είναι ελάχιστες, κυρίως λόγω του χαμηλού αιολικού δυναμικού της περιοχής
description: Wind power is now an attractive solution to the power problem. The energy used is abundant, decentralized and free of charge. No greenhouse gases and other pollutants are emitted, and the impact on the environment is small compared to conventional power plants. Also, the economic benefits of an area from the development of the wind industry are remarkable. For these reasons, it has been investigated in the present study whether there are suitable sites for the location of terrestrial wind farms in the regional section of Magnesia with the help of the Geographical Information Systems (GIS). For the purpose of finding these sites there are excluded areas defined by the Special Framework for Spatial Planning and Sustainable Development of RES, the relevant institutional framework, and by the international literature, for any gaps in it. Results after applying the criteria, have shown that the available areas are minimal, mainly due to the low wind potential of the area
Jurisdictional review: an error of jurisdiction or jurisprudence?
Creators: name: Sidebotham, Naomi Elizabeth
Publisher: name: University of British Columbia
Year: 2009

description: During the past decade we have witnessed a vast growth in the volume and variety of discretionary powers, designed to achieve an array of social, economic and other objectives, conferred by government onto numerous administrative authorities. The potential width of these powers and the consequent possibility that they will be misused by the administrative decision maker necessitates that there exist some mechanism for ensuring that they are not so employed. This in turn raises the question of how such regulation of administrative decision making is to be best effected. Administrative law scholarship has for the most part presumed the courts to be the best mechanism. It has been characterised by an apparently insoluble debate over whether the courts should adopt an activist stance when reviewing exercises of discretion or whether they should rather exert restraint and defer to the expertise of the decision maker. The focus of this debate, and of judicial decisions, is on defining the ambit of a decision maker's power, or jurisdiction, as conferred in the empowering statute. It is asserted in this thesis that it is because courts and academic writers are concentrating on discerning conclusively these jurisdictional limits that this debate continues unresolved. It is argued that an alternative perspective of administrative law and the role of the courts in the administrative process is consequently demanded. The current framework of discussion is critiqued throughout the thesis, and the concept of jurisdiction is critically examined from both a theoretical and practical perspective. It is asserted that the theoretical assumptions from which it is derived are misconceived and that the impact of adhering to such a concept on the administrative process is considerable. Consequently it is concluded that as a basis of review jurisdiction should be discarded. Once this is achieved it is contended that it may be possible to construct better ways of dealing with administrative discretionary powers that focus not on the role of the courts in correcting perceived mistakes in the decision making process but rather on promoting good decision making. That is ensuring that decisions which best implement the stipulated objectives of a particular power are achieved, without the need for the largely negative intervention of outside agencies.
The quantum $p$-spin glass model: A user manual for holographers
Creators: name: Anous, Tarek
name: Haehl, Felix M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study a large-$N$ bosonic quantum mechanical sigma-model with a spherical target space subject to disordered interactions, more colloquially known as the $p$-spin spherical model. Replica symmetry is broken at low temperatures and for sufficiently weak quantum fluctuations, which drives the system into a spin glass phase. The first half of this paper is dedicated to a discussion of this model's thermodynamics, with particular emphasis on the marginally stable spin glass. This phase exhibits an emergent conformal symmetry in the strong coupling regime, which dictates its thermodynamic properties. It is associated with an extensive number of nearby states in the free energy landscape. We discuss in detail an elegant approximate solution to the spin glass equations, which interpolates between the conformal regime and an ultraviolet-complete short distance solution. In the second half of this paper we explore the real-time dynamics of the model and uncover quantum chaos as measured by out-of-time-order four-point functions, both numerically and analytically. We find exponential Lyapunov growth, which intricately depends on the model's couplings and becomes strongest in the quantum critical regime. We emphasize that the spin glass phase also exhibits quantum chaos, albeit with parametrically smaller Lyapunov exponent than in the replica symmetric phase. An analytical calculation in the marginal spin glass phase suggests that this Lyapunov exponent vanishes in a particular infinite coupling limit. We comment on the potential meaning of these observations from the perspective of holography.
description: 66 (+39) pages, 19 (+2) figures; v2: added references and minor comments (published version)
Brane Inflation After WMAP Three Year Results
Creators: name: Huang, Qing-Guo
name: Li, Miao
name: She, Jian-Huang
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: WMAP three-year data favors a red power spectrum at the level of 2 standard deviations, which provides a stringent constraint on the inflation models. In this note we use this data to constrain brane inflation models and find that KKLMMT model can not fit WMAP+SDSS data at the level of 1 standard deviation and a fine-tuning, eight parts in thousand at least, is needed at the level of 2 standard deviation.
description: 10 pages, 3 figures; references added; version for publication in JCAP
Dipolar effect in coherent spin mixing of two atoms in a single optical lattice site
Creators: name: Sun, B.
name: Zhang, W. X.
name: Yi, S.
name: Chapman, M. S.
name: You, L.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We show that atomic dipolar effects are detectable in the system that recently demonstrated two-atom coherent spin dynamics within individual lattice sites of a Mott state. Based on a two-state approximation for the two-atom internal states and relying on a variational approach, we have estimated the spin dipolar effect. Despite the absolute weakness of the dipole-dipole interaction, it is shown that it leads to experimentally observable effects in the spin mixing dynamics.
description: 4 pages, 3 color eps figures, to appear in Phys. Rev. Lett
Neue Funde um den Neuburger Hof (Rhein-Wupper-Kreis)
Creators: name: Herrnbrodt, Adolf
name: Petrikovits, Harald Von
name: Uslar, Rafael Von
Publisher: name: Bonner Jahrbücher
Year: 2021

description: Bonner Jahrbücher, Bd. 155/156, 2.1955/1956: Bonner Jahrbücher
IC MAGE Model 14 – bounding surface plasticity model for sands under static and cyclic loading
Creators: name: Moller, Julia K
Publisher: name: Zenodo
Year: 2023
Subjects: Geotechnical Analysis
Finite Element Analysis
Constitutive Modelling
Geotechnical Engineering
Sand
Bounding Surface Plasticity
Liquefaction

description: IC MAGE M14 is a user-defined model for PLAXIS built using the IC MAGE UMIP framework. This model is based on the bounding surface plasticity model by Manzari & Dafalias (1997), subsequently expanded by Papadimitriou & Bouckovalas (2002) and Taborda et al. (2014). It focuses on providing a flexible and modular approach to bounding surface plasticity modelling of sand behaviour, both under monotonic and cyclic loading conditions.
description: {"references": ["Been, K. and Jefferies, M.G. (1985) A state parameter for sands. Geotechnique, 35(2), 99-112. doi: 10.1680/geot.1985.35.2.99", "Manzari, M.T. and Dafalias, Y.F. (1997) A critical state two-surface plasticity model for sands. Geotechnique, 47(2), 255-272. doi: 10.1680/geot.1997.47.2.255", "Papadimitriou, A.G. and Bouckovalas, G.D. (2002) Plasticity model for sand under small and large cyclic strains: a multiaxial formulation. Soil Dynamics and Earthquake Engineering, 22(3), 191-204. doi: 10.1016/S0267-7261(02)00009-X", "Taborda, D.M.G., Zdravkovic, L., Kontoe, S. and Potts, D. M. (2014) Computational study on the modification of a bounding surface plasticity model for sands. Computers and Geotechnics. 59, 145\u2013160. doi: 10.1016/j.compgeo.2014.03.005"]}
IC MAGE Model 14 – bounding surface plasticity model for sands under static and cyclic loading
Creators: name: Moller, Julia K
Publisher: name: Zenodo
Year: 2023
Subjects: Geotechnical Analysis
Finite Element Analysis
Constitutive Modelling
Geotechnical Engineering
Sand
Bounding Surface Plasticity
Liquefaction

description: IC MAGE M14 is a user-defined model for PLAXIS built using the IC MAGE UMIP framework. This model is based on the bounding surface plasticity model by Manzari & Dafalias (1997), subsequently expanded by Papadimitriou & Bouckovalas (2002) and Taborda et al. (2014). It focuses on providing a flexible and modular approach to bounding surface plasticity modelling of sand behaviour, both under monotonic and cyclic loading conditions.
IC MAGE Model 14 – bounding surface plasticity model for sands under static and cyclic loading
Creators: name: Moller, Julia K
Publisher: name: Zenodo
Year: 2024
Subjects: Geotechnical Analysis
Finite Element Analysis
Constitutive Modelling
Geotechnical Engineering
Sand
Bounding Surface Plasticity
Liquefaction

description: IC MAGE M14 is a user-defined model for PLAXIS built using the IC MAGE UMIP framework. This model is based on the bounding surface plasticity model by Manzari & Dafalias (1997), subsequently expanded by Papadimitriou & Bouckovalas (2002) and Taborda et al. (2014). It focuses on providing a flexible and modular approach to bounding surface plasticity modelling of sand behaviour, both under monotonic and cyclic loading conditions.
Die Ausgrabung nachkarolingischer Töpferöfen in Paffrath, Gemeinde Bergisch-Gladbach, Rheinisch-Bergischer Kreis
Creators: name: Lung, Walter
Publisher: name: Bonner Jahrbücher
Year: 2021

description: Bonner Jahrbücher, Bd. 155/156, 2.1955/1956: Bonner Jahrbücher
ECRcentral: An open and central platform for early-career researchers
Creators: name: Khan, Aziz
name: ELife Community Ambassadors
Publisher: name: F1000 Research Limited
Year: 2019

description: For early-career researchers (ECRs), getting funding for their research ideas is becoming more and more competitive, and there is growing pressure in all disciplines to obtain grants. Although there is a plethora of funding opportunities for postdoctoral scientists and other ECRs, there has been no central platform to systematically search for such funding opportunities and/or to get professional feedback on the proposal. With a group of eLife Ambassadors, we developed ECRcentral (ecrcentral.org), a funding database and an open forum for the ECR community. The platform is open to everyone and currently contains 700 funding schemes in a wide range of scientific disciplines, 100 travel grants, and a diverse range of useful resources. In the first two months since its release approximately 500 ECRs already joined this community. The platform is developed using open-source technology, with all the source code and related content made openly available through our GitHub repository (github.com/ecrcentral). ECRcentral aims to bring ECRs and resources for funding together, to facilitate discussions about those opportunities, share experiences, and create impact through community engagement. We strongly believe that this resource will be highly valuable for ECRs and the scientific community at large.
Die Ausgrabungen auf der Motte 'Hoverberg' bei Birgelen. Kreis Geilenkirchen-Heinsberg
Creators: name: Herrnbrodt, Adolf
Publisher: name: Bonner Jahrbücher
Year: 2021

description: Bonner Jahrbücher, Bd. 155/156, 2.1955/1956: Bonner Jahrbücher
Accurate Effective-One-Body waveforms of inspiralling and coalescing black-hole binaries
Creators: name: Damour, Thibault
name: Nagar, Alessandro
name: Hannam, Mark
name: Husa, Sascha
name: Brugmann, Bernd
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The Effective-One-Body (EOB) formalism contains several flexibility parameters, notably $a_5$, $\vp$ and $\a$. We show here how to jointly constrain the values of these parameters by simultaneously best-fitting the EOB waveform to two, independent, numerical relativity (NR) simulations of inspiralling and/or coalescing binary black hole systems: published Caltech-Cornell {\it inspiral} data (considered for gravitational wave frequencies $Mω\leq 0.1$) on one side, and newly computed {\it coalescence} data on the other side. The resulting, approximately unique, "best-fit" EOB waveform is then shown to exhibit excellent agreement with NR coalescence data for several mass ratios. The dephasing between this best-fit EOB waveform and published Caltech-Cornell inspiral data is found to vary between -0.0014 and +0.0008 radians over a time span of $\sim 2464M$ up to gravitational wave frequency $Mω= 0.1$, and between +0.0013 and -0.0185 over a time span of 96M after $Mω=0.1$ up to $Mω=0.1565$. The dephasings between EOB and the new coalescence data are found to be smaller than: (i) $\pm 0.025$ radians over a time span of 730M (11 cycles) up to merger, in the equal mass case, and (ii) $\pm 0.05$ radians over a time span of about 950M (17 cycles) up to merger in the 2:1 mass-ratio case. These new results corroborate the aptitude of the EOB formalism to provide accurate representations of general relativistic waveforms, which are needed by currently operating gravitational wave detectors.
description: 25 pages, 15 figures. Improved discussion about errors on numerical relativity data. Version published in Phys. Rev. D
Fast periodic Gaussian density fitting by range separation
Creators: name: Ye, Hong-Zhou
name: Berkelbach, Timothy C.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: We present an efficient implementation of periodic Gaussian density fitting (GDF) using the Coulomb metric. The three-center integrals are divided into two parts by range-separating the Coulomb kernel, with the short-range part evaluated in real space and the long-range part in reciprocal space. With a few algorithmic optimizations, we show that this new method -- which we call range-separated GDF (RSGDF) -- scales sublinearly to linearly with the number of $k$-points for small to medium-sized $k$-point meshes that are commonly used in periodic calculations with electron correlation. Numerical results on a few three-dimensional solids show about $10$-fold speedups over the previously developed GDF with little precision loss. The error introduced by RSGDF is about $10^{-5}~E_{\textrm{h}}$ in the converged Hartree-Fock energy with default auxiliary basis sets and can be systematically reduced by increasing the size of the auxiliary basis with little extra work. [The article has been accepted by The Journal of Chemical Physics.]
description: 7 pages, 3 figures
Texto: O nhambuzinho
Creators: name: Tamuxi, Luiz
name: Bardagil Mas, Bernat
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2023
Subjects: Manoki language

description: Luíz Tamuxi conta a história do nhambuzinho em mỹky.
Luíz Tamuxi tells the myth of the tinamou (Crypturellus parvirostris) in Mỹky.
Nuclear Star Clusters (Nuclei) in Spiral Galaxies and Connection to Supermassive Black Holes
Creators: name: van der Marel, Roeland P.
name: Rossa, Joern
name: Walcher, Carl Jakob
name: Boeker, Torsten
name: Ho, Luis C.
name: Rix, Hans-Walter
name: Shields, Joseph C.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: HST observations have revealed that compact sources exist at the centers of many, maybe even most, galaxies across the Hubble sequence. These sources are called "nuclei" or also "nuclear star clusters" (NCs), given that their structural properties and position in the fundamental plane are similar to those of globular clusters. Interest in NCs increased recently due to the independent and contemporaneous finding of three groups (Rossa et al. for spiral galaxies; Wehner & Harris for dE galaxies; and Cote et al. for elliptical galaxies) that NC masses obey similar scaling relationships with host galaxy properties as do supermassive black holes. Here we summarize the results of our group on NCs in spiral galaxies. We discuss the implications for our understanding of the formation and evolution of NCs and their possible connection to supermassive black holes.
description: 4 pages, to appear in the Proceedings of IAU Symposium 241 "Stellar Populations as Building Blocks of Galaxies", A. Vazdekis and R. Peletier., eds. PDF file with better resolution figures resolution available at http://www.stsci.edu/~marel/pdfdir/nucleiIAU241.pdf
Propagation of Axial and Polar Gravitational Waves in Kantowski-Sachs Universe
Creators: name: Datta, Sucheta
name: Guha, Sarbari
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We apply the Regge-Wheeler formalism to study axial and polar gravitational waves in Kantowski-Sachs universe. The background field equations and the linearised perturbation equations for the modes are derived in presence of matter. To find analytical solutions, we analyze the propagation of waves in vacuum spacetime. The background field equations in absence of matter are solved by assuming the expansion scalar to be proportional to the shear scalar. Using the method of separation of variables, the axial perturbation parameter $ h_0(t, r) $ is obtained from its wave equation. The other perturbation $ h_1(t, r) $ is then determined from $ h_0(t, r) $. The anisotropy of the background spacetime is responsible for the damping of the axial waves. The polar perturbation equations are much more involved compared to their FLRW counterparts, as well as to the axial perturbations in Kantowski-Sachs background. In both the axial and polar cases, the radial and temporal solutions separate out as products. The temporal part of the polar perturbation solutions are plotted against time to obtain an order of magnitude estimate of the frequency of the propagating GWs and lies in the range 1000-2000 Hz. Using standard observational data for the GW strain we have placed constraints on the parameters in the polar perturbation solutions. The perturbation equations in presence of matter show that the axial waves can cause perturbations only in the azimuthal velocity of the fluid without deforming the matter field. But the polar waves must perturb the energy density, the pressure and also the non-azimuthal components of the fluid velocity.
description: 26 pages, 3 figures, accepted for publication in Physics of the Dark Universe
Magnetic spectral response and lattice properties in mixed-valence Sm1-x Yx S solid solutions studied with x-ray diffraction, x-ray absorption spectroscopy, and inelastic neutron scattering
Creators: name: Alekseev, P. A.
name: Mignot, J. -M.
name: Nefeodova, E. V.
name: Nemkovski, K. S.
name: Lazukov, V. N.
name: Tiden, N. N.
name: Menushenkov, A. P.
name: Chernikov, R. V.
name: Klementiev, K. V.
name: Ochiai, A.
name: Golubkov, A. V.
name: Bewley, R. I.
name: Rybina, A. V.
name: Sadikov, I. P.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Mixed-valence phenomena occurring in the "black" (B) and "gold" (G) phases of Sm1-x Yx S have been studied by x-ray diffraction, x-ray absorption spectroscopy, and inelastic neutron scattering. Lattice-constant and phonon-dispersion results confirm that the valence instability occurs already inside the B phase. On the other hand, pronounced temperature anomalies in the thermal expansion α(T), as well as in the Sm mean-square displacements denote the onset of the B-G transition for the compositions x = 0.33 and 0.45. It is argued that these anomalies primarily denote an effect of electron-phonon coupling. The magnetic spectral response, measured on both powder and single crystals, is dominated by the Sm2+ spin-orbit component close to 36 meV. A strongly overdamped Sm3+ contribution appears only for x >= 0.33 near room-temperature. The quasielastic signal is strongly suppressed below 70 K, reflecting the formation of the singlet mixed-valence ground state. Quite remarkably, the signal around 36 meV is found, from the single-crystal spectra, to arise from two distinct, dispersive, interacting branches. The lower peak, confirmed to exist from x = 0.17 to x = 0.33 at least, is tentatively ascribed to an excitation specific to the mixed-valence regime, reminiscent of the "exciton" peak reported previously for SmB6 .
description: Submitted to Phys. Rev; B (14 pages, 13 figures, 2 tables)
ParAMS: Parameter Optimization for Atomistic and Molecular Simulations
Creators: name: Komissarov, Leonid
name: Rüger, Robert
name: Hellström, Matti
name: Verstraelen, Toon
Publisher: name: arXiv
Year: 2021
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: This work introduces ParAMS -- a versatile Python package that aims to make parameterization workflows in computational chemistry and physics more accessible, transparent and reproducible. We demonstrate how ParAMS facilitates the parameter optimization for potential energy surface (PES) models, which can otherwise be a tedious specialist task. Because of the package's modular structure, various functionality can be easily combined to implement a diversity of parameter optimization protocols. For example, the choice of PES model and the parameter optimization algorithm can be selected independently. An illustration of ParAMS' strengths is provided in two case studies: i) a density functional-based tight binding (DFTB) repulsive potential for the inorganic ionic crystal ZnO, and ii) a ReaxFF force field for the simulation of organic disulfides.
description: 16 pages, 5 figures (of which 1 in SI), 3 tables (of which 2 in SI)
Η ρητορική μιας εκκένωσης: πώς κάλυψαν οι εφημερίδες την εκκένωση του προσφυγικού καταυλισμού στη Μόρια και την Ειδομένη
Creators: name: Χατζηκουκούτση, Γεωργία Σωτηρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: ειρηνευτική δημοσιογραφία
Κριτική ανάλυση λόγου
Δεοντολογία
Ρατσισμός
Προσφυγικό
Peace journalism
Critical discourse analysis
Journalism ethics
Racism
Refugee crisis

description: Η προσφυγική κρίση όπως έκανε την επανεμφάνισή του τα τελευταία χρόνια με τον πόλεμο στη Συρία και τις μεγάλες προσφυγικές ροές προςτην Ελλάδα έφερε ξανά στην επιφάνεια τις εθνοκεντρικές οπτικές που επικρατούν στον δημοσιογραφικό λόγο της και αντιμετωπίζουν τη μετανάστευση ως ένα φαινόμενο πουπροκαλεί τριγμούς στην ελληνική κοινωνία. Η παρούσα εργασία με επίκεντρο δύο περιστατικά μελετά δημοσιεύματα του τύπου και με εργαλεία την Κριτική Ανάλυση Λόγου, τη θεωρία της Ειρηνευτικής Δημοσιογραφίας και τη Χάρτα της Ειδομένης και εντοπίζει στοιχεία ρατσιστικού ή αντιοικουμενικού λόγου, περιπτώσεις που καταπατήθηκαν οι αρχές τις ειρηνευτικής δημοσιογραφίας και τα άρθρα της Χάρτας της Ειδομένης. Δύο εφημερίδες πανελλαδικής κυκλοφορίας και τέσσερις τοπικές εφημερίδες έδωσαν το υλικό για μία ανάλυση λόγου αλλά και περιεχομένου. Δεν πρόκειται για μία αμιγώς γλωσσολογική εργασία αφού δεν μπορέσαμε ναπαραβλέψουμε και σημειολογικά στοιχεία όπως η γραμματοσειρές ή οι φωτογραφίες. Δεδομένου ότι η κριτική ανάλυση λόγου έχει έντονο κοινωνικοπολιτικό και ταξικό χαρακτήρα, στο όνομα της υπεράσπισης των κοινωνικά αδύναμων που ευαγγελίζεται, κάτι τέτοιο είναι αποδεκτό
description: The refugee crisis as it did its reappearance in recent years, with the war in Syria and the great refugee flows to Greece, has brought to light the ethnocentric views that prevail in its journalism and are facing immigration as a phenomenon that causes turmoil in the Greek society. This paper, focusing on two incidents, is studying press articles and using Critical Discourse Analysis, Peace Journalism Theory, and identifying elements of racist or anti-ecumenical discourse, cases where the principles of peace journalism have been violated as well as the articles of the Charter OfEdomeni. Two newspapers of country distribution and four local newspapers provided the material for an analysis of text and content. This is not a purely linguistic work because we could not overlook semiological elements such as fonts or photos. Since the critical analysis of speech has a strong socio-political and class character, in the name of defending the socially weak, this is acceptable
How journalism researchers navigate the AI hype: research orientations and intervention recommendations
Creators: name: Zhang, Xinzhi
name: Huang, Wei
name: Zhu, Jonathan J. H.
Publisher: name: Taylor & Francis
Year: 2025
Subjects: Developmental Biology
Cancer
Science Policy

description: As AI becomes increasingly integrated into news production, research on its implications for journalism abounds. However, how these studies normatively judge and provide interventions, which is crucial for journalism researchers and practitioners to progress in the discipline, largely remains unexplored. To fill this gap, extending the dichotomy between administrative and critical research orientations proposed by Lazarsfeld [(1941). Remarks on administrative and critical communications research. Zeitschrift für Sozialforschung 9 (1941): 2–16. https://doi.org/10.5840/zfs1941912], this study examines how researchers interpret their findings normatively and propose interventions beyond academia. We develop a framework categorizing journalism research orientations into four types: administrative, critical, advocacy, and problem-solving, while incorporating the comparative media systems theory to contextualize the reviewed studies. Analyzing 144 empirical articles from the Web of Science database on AI’s role in editorial decision-making and news dissemination, we find a prevalent negativity bias in interpreting results, with approximately half of the studies offering intervention recommendations. Critical research dominates, highlighting negative outcomes without constructive solutions. Conversely, one-third of the studies adopt a problem-solving orientation, addressing challenges while proposing actionable interventions. These recommendations target individual news workers, intra-organizational dynamics, and inter-organizational relationships. While both liberal and democratic corporatist systems have a similar proportion of critical and problem-solving research, little attention is given to the ethical, political, and legal tensions between journalists and external forces such as platforms, governments, and markets. We urge future research to engage with broader regulatory and societal contexts, providing evidence-based interventions to support the professionalism of journalism in the evolving digital public sphere shaped by AI.
Η κοινωνική κατασκευή της παιδικής ηλικίας στην τηλεοπτική εκπομπή «Junior Music Stars»
Creators: name: Γρόλλιος, Δημήτριος Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: Κοινωνική κατασκευή
Παιδική ηλικία
Λόγος
Social Construction
Childhood
Discourse

description: Στην εργασία αυτή, γίνεται μια εξέταση του ζητήματος της κοινωνικής κατασκευής της παιδικής ηλικίας μέσα στην τηλεοπτική εκπομπή «Junior Music Stars. Στόχος είναι η κριτική προσέγγιση του πώς κατασκευάζεται κοινωνικά η παιδική ηλικία σε ένα talent show για παιδιά στον τομέα του τραγουδιού και της μουσικής. Στην παρούσα εργασία, μας απασχολεί ο τρόπος με τον οποίο αναπαρίσταται η παιδική ηλικία και εξετάζουμε ποιες είναι οι κυρίαρχες αντιλήψεις γύρω από αυτήν. Το ενδιαφέρον μας επικεντρώνεται στο τι σημαίνει να είναι κανείς «παιδί» μέσα στο λόγο της τηλεόρασης, η οποία αποτελεί ένα μέσο μαζικής ενημέρωσης (Μ.Μ.Ε.). Η μέθοδος που θα ακολουθήσουμε στην συγκεκριμένη εργασία είναι η ανάλυση λόγου, η οποία έχει συγκεκριμένους άξονες με βάση τους οποίους καλύπτεται το φάσμα των παραμέτρων που μας απασχολούν. Οι άξονες της ανάλυσης βρίσκονται σε αντιστοιχία με τις βασικές λειτουργίες του λόγου, όπως αυτές εκφράζονται στο έργο του Michel Foucault. Εντός της παρούσας εργασίας θα διερευνήσουμε, ακόμα, τον τρόπο με τον οποίο θεωρούμε ότι αναπαράγονται σχέσεις εξουσίας μεταξύ ενηλίκων και παιδιών και κατασκευάζονται ιδιαίτερες ταυτότητες και υποκειμενικότητες μέσα στο πλαίσιο μιας τηλεοπτικής εκπομπής με χαρακτήρα talent show
description: In this paper we take a closer look at the issue of the social construction of childhood inside the “Junior Music Stars” television show. We aim to critically approach the social construction of childhood in “Junior Music Stars”, a talent show in the area of music and singing. Specifically, in “Junior Music Stars” we are interested in unveiling how childhood is represented and we examine the dominant concepts around it. Our major concern is focused on what it truly means to be a child in the television discourse. Our methodology in this paper is the discourse analysis which has specific axes and based on these axes we attempt to cover the range of parameters we are dealing with. The analysis axes are in correspondence to the basic features of the discourse, as those are articulated in Michel Foucault’s work. In this paper, we, also, look into the way that we think power relationships are being shaped between adults and children and the way distinctive identities and subjectivities are formed in the context of a television talent show
One-Dimensional Fuzzy Dark Matter Models: Structure Growth and Asymptotic Dynamics
Creators: name: Zimmermann, Tim
name: Schwersenz, Nico
name: Pietroni, Massimo
name: Wimberger, Sandro
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Quantum Gases (cond-mat.quant-gas)
subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: This paper investigates the feasibility of simulating Fuzzy Dark Matter (FDM) with a reduced number of spatial dimensions. Our aim is to set up a realistic, yet numerically inexpensive, toy model in $(1+1)$-dimensional space time, that - under well controlled system conditions - is capable of realizing important aspects of the full-fledged $(3+1)$-FDM phenomenology by means of one-dimensional analogues. Based on the coupled, nonlinear and nonlocal $(3+1)$-Schrödinger-Poisson equation under periodic boundary conditions, we derive two distinct one-dimensional models that differ in their transversal matter distribution and consequently in their nonlocal interaction along the single dimension of interest. We show that these discrepancies change the relaxation process of initial states as well as the asymptotic, i.e., thermalized and virialized, equilibrium state. Our investigation includes the dynamical evolution of artificial initial conditions for non-expanding space, as well as cosmological initial conditions in expanding space. The findings of this work are relevant for the interpretation of numerical simulation data modelling nonrelativistic fuzzy cold dark matter in reduced dimensions, in the quest for testing such models and for possible laboratory implementations of them.
description: 24 pages, 14 figures, accepted for publication in Physical Review D
A Covariant Approach to Noncommutative M5-branes
Creators: name: Sakaguchi, Makoto
name: Yoshida, Kentaroh
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We briefly review how to discuss noncommutative (NC) M5-branes and intersecting NC M5-branes from kappa-invariance of an open supermembrane action with constant three-form fluxes. The kappa-invariance gives rise to possible Dirichlet brane configurations. We shortly summarize a construction of projection operators for NC M5-branes and some intersecting configurations of NC M5-branes. A strong flux limit of them is also discussed.
description: 4 pages, 1 figure, LaTeX, A contribution to Nishinomiya-Yukawa Memorial Symposium on Theoretical Physics ``Noncommutative Geometry and Quantum Spacetime in Physics'' (Nov. 11-15, 2006, Japan). To appear in Progress of Theoretical Physics Supplement
Axion-Neutrino Interplay in a Gauged Two-Higgs-Doublet Model
Creators: name: Dias, Alex G.
name: Leite, Julio
name: Gonçalves, Diego S. V.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We propose a gauged two-Higgs-doublet model (2HDM) featuring an anomalous Peccei-Quinn symmetry, $U(1)_{PQ}$. Dangerous tree-level flavour-changing neutral currents, common in 2HDMs, are forbidden by the extra gauge symmetry, $U(1)_X$. In our construction, the solutions to the important issues of neutrino masses, dark matter and the strong CP problem are interrelated. Neutrino masses are generated via a Dirac seesaw mechanism and are suppressed by the ratio of the $U(1)_X$ and the $U(1)_{PQ}$ breaking scales. Naturally small neutrino masses suggest that the breaking of $U(1)_X$ occurs at a relatively low scale, which may lead to observable signals in near-future experiments. Interestingly, spontaneous symmetry breaking does not lead to mixing between the $U(1)_X$ gauge boson, $Z^\prime$, and the standard $Z$. For the expected large values of the $U(1)_{PQ}$ scale, the associated axion becomes "invisible", with DFSZ-like couplings, and may account for the observed abundance of cold dark matter. Moreover, a viable parameter space region, which falls within the expected sensitivities of forthcoming axion searches, is identified. We also observe that the flavour-violating process of kaon decaying into pion plus axion, $K^+ \to π^+ a$, is further suppressed by the $U(1)_X$ scale, providing a rather weak lower bound for the axion decay constant $f_a$.
description: 30 pages, 2 figures, 3 tables; few refs added and typos corrected. To appear in PRD
Baryon asymmetry from hypermagnetic helicity in dilaton hypercharge electromagnetism
Creators: name: Bamba, Kazuharu
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The generation of the baryon asymmetry of the Universe (BAU) from the hypermagnetic helicity, the physical interpretation of which is given in terms of hypermagnetic knots, is studied in inflationary cosmology, taking into account the breaking of the conformal invariance of hypercharge electromagnetic fields through both a coupling with the dilaton and that with a pseudoscalar field. It is shown that if the electroweak phase transition (EWPT) is strongly first order and the present amplitude of the generated magnetic fields on the horizon scale is sufficiently large, a baryon asymmetry with a sufficient magnitude to account for the observed baryon to entropy ratio can be generated.
description: 16 pages, 2 figures, a reference added, typos corrected
The NAFTA’s institutions and dispute resolution mechanisms: a case for public participation
Creators: name: Bodie, J. Scott
Publisher: name: University of British Columbia
Year: 2009

description: The objective of this thesis is to determine whether those who negotiated the NAFTA created institutions and dispute resolution mechanisms capable of allowing the NAFTA to achieve its policy goals. Accordingly, this thesis first examines the intellectual and historical roots of free trade in North America in an effort to determine what the goals of policymakers were when they negotiated the NAFTA. The thesis then analyzes the institutional and dispute resolution provisions of the NAFTA through a set of criteria to assess whether these provisions are capable of furthering those goals. This analysis leads the author to conclude that the Parties have created a system incompatible with the freemarket goals of the free trade policy. The present regime virtually shuts private parties out of the decision-making process leaving both the creation of rules and the protection of their integrity within the hands of the governments of the three Parties. Without effective avenues for participation, the market will not respond in the manner necessary to allow North Americans to reap the benefits predicted by the theory of comparative advantage. The thesis therefore makes a series of proposals aimed at increasing the access of private parties to the NAFTA's institutions and dispute resolution mechanisms. The goal of such recommendations is to create a legal order capable of enabling the NAFTA to deliver the economic advantages policymakers promised to North Americans when they initiated free trade negotiations.
Η Φωνή στην Ελληνική – Παραγωγή Γλωσσοδιδακτικού Υλικού για αλλόγλωσσους
Creators: name: Στυλιανού, Ευαγγελία Στυλιανού
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: Ελληνική ως δεύτερη/ξένη γλώσσα
Λειτουργική κατηγορία της φωνής
Γλωσσοδιδακτικά μοντέλα
Greek as a second/foreign language
Functional category of voice
language teaching models

description: Σκοπός της παρούσας εργασίας ήταν η παραγωγή γλωσσοδιδακτικού υλικού για αλλόγλωσσους σπουδαστές επιπέδου Β2, σχετικά με τη λειτουργική κατηγορία της φωνής στην ελληνική ως δεύτερη/ξένη γλώσσα. Αρχικά, προσπαθήσαμε να περιγράψουμε γλωσσολογικά το φαινόμενο στηριζόμενοι στη βιβλιογραφία (π.χ. Τσιμπλή 2006, Fotiadou 2010, Σιούπη 1998). Ακολούθως, προσεγγίσαμε, γενικότερα, τη διαδικασία της μάθησης μέσα από ερευνητικά δεδομένα της γνωστικής και εκπαιδευτικής ψυχολογίας (π.χ. Schunk 2010), σε συνδυασμό με σύγχρονες γλωσσοδιδακτικές τεχνικές, οι πρακτικές των οποίων αποσκοπούν στην ταχύτερη αναδόμηση της διαγλώσσας των σπουδαστών και ενθαρρύνουν την εξοικείωσή τους με τις επεξεργαστικές τους στρατηγικές. Συγκεκριμένα, η μεθοδολογία που ακολουθήσαμε για το σχεδιασμό του συγκεκριμένου υλικού στηρίζεται στις αρχές του μοντέλου επεξεργασίας εισαγόμενων γλωσσικών δεδομένων (π.χ. VanPatten 1996, 2004), της εστίασης στον τύπο (π.χ. VanPatten et al. 2004) και της διδασκαλίας μέσω επικοινωνιακής προσέγγισης (π.χ. Αντωνοπούλου 2000). Παράλληλα, δίνεται έμφαση στη θεωρία γνωστικής επεξεργασίας πληροφοριών, στην κοινωνικογνωστική θεωρία και στις αρχές του εποικοδομητισμού. Τέλος, παραθέσαμε αναλυτικά το υλικό με οδηγίες υλοποίησης και διδακτικούς στόχους
description: The aim of this study was to present pedagogical and teaching activities in the active and medio-passive verb forms for non-native speakers of Greek who are in the level of B2. Firstly, based on the literature (e.g. Tsimpli 2006, Fotiadou 2010, Sioupi 1998), we tried to describe the functional category of voice from a theoretical-linguistic perspective. Then, we dealt in general with the processes of learning, taking into account essential inquiries from the fields of cognitive and educational psychology (e.g. Schunk 2010). Simultaneously, we relied on contemporary language educational techniques from the field of applied linguistics. These techniques help foreign learners to develop their interlanguage in a way that the acquisition become more easily and rapidly. Moreover, we anticipate that learners familiarize with their processing strategies via their involvement with activities based on these techniques. To become more accurate, the means and methods that we followed to shape our teaching material comes from the model of processing instruction (e.g. VanPatten 1996, 2004), the model of focus on form (e.g. VanPatten et al. 2004) and the communicative approach in language teaching (e.g. Antonopoulou 2000). In the same time, we emphasize on the psycholinguistic theory of cognitive and information processing, social-and-cognitive theory and the principles of constructivism theory. Finally, we presented the whole teaching material with the necessary instructions and the teaching goals
Speech is Silver, Silence is Golden: What do ASVspoof-trained Models Really Learn?
Creators: name: Müller, Nicolas M.
name: Dieckmann, Franziska
name: Czempin, Pavel
name: Canals, Roman
name: Böttinger, Konstantin
name: Williams, Jennifer
Publisher: name: arXiv
Year: 2021
Subjects: subject: Sound (cs.SD)
subject: Audio and Speech Processing (eess.AS)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: We present our analysis of a significant data artifact in the official 2019/2021 ASVspoof Challenge Dataset. We identify an uneven distribution of silence duration in the training and test splits, which tends to correlate with the target prediction label. Bonafide instances tend to have significantly longer leading and trailing silences than spoofed instances. In this paper, we explore this phenomenon and its impact in depth. We compare several types of models trained on a) only the duration of the leading silence and b) only on the duration of leading and trailing silence. Results show that models trained on only the duration of the leading silence perform particularly well, and achieve up to 85% percent accuracy and an equal error rate (EER) of 15.1%. At the same time, we observe that trimming silence during pre-processing and then training established antispoofing models using signal-based features leads to comparatively worse performance. In that case, EER increases from 3.6% (with silence) to 15.5% (trimmed silence). Our findings suggest that previous work may, in part, have inadvertently learned thespoof/bonafide distinction by relying on the duration of silence as it appears in the official challenge dataset. We discuss the potential consequences that this has for interpreting system scores in the challenge and discuss how the ASV community may further consider this issue.