cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
On the Conductance Sum Rule for the Hierarchical Edge States of the Fractional Quantum Hall Effect
Creators: name: Ma, Zhong-Shui
name: Chen, Yi-Xin
name: Su, Zhao-Bin
Publisher: name: arXiv
Year: 1993
Subjects: subject: Condensed Matter (cond-mat)
subject: FOS: Physical sciences

description: The conductance sum rule for the hierarchical edge channel currents of a Fractional Quantum Hall Effect state is derived analytically within the Haldane-Halperin hierarchy scheme. We provide also an intuitive interpretation for the hierarchical drift velocities of the edge excitations.
description: 11 pages, no figure, Revtex 3.0, IC/93/329, ASITP-93-52
Is General Relativity an 'Already Parametrized' Field Theory?
Creators: name: Torre, C. G.
Publisher: name: arXiv
Year: 1992
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Beginning with the work of Dirac and Arnowitt, Deser, Misner in the late fifties and early sixties, and then after subsequent development by Kucha\v r, the canonical dynamical structure of general relativity has often been viewed as that of a parametrized field theory in which the many-fingered spacetime variables are hidden amongst the geometrodynamical field variables. This paradigm of general relativity as an ``already parametrized theory'' forms the basis for one of the most satisfactory resolutions of the problems of time and observables in classical and quantum gravity. However, despite decades of effort, no identification of many-fingered spacetime variables has ever been satisfactorily obtained for vacuum general relativity. We point out that there is an obstruction to identifying the constraint surface of general relativity (for the case of a closed universe) with that of any parametrized theory. Therefore, strictly speaking, general relativity cannot be viewed as a parametrized field theory. We discuss implications for the canonical quantization program.
description: 9 pages
Laser-controlled field effect in graphene/hexagonal boron nitride heterostructures
Creators: name: Wlasny, Igor
name: Stepniewski, Roman
name: Klusek, Zbigniew
name: Strupinski, Wlodzimierz
name: Wysmolek, Andrzej
Publisher: name: arXiv
Year: 2018
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The possibility of modification of the local properties of hexagonal boron nitride (h-BN) by laser irradiation is investigated. Investigations conducted using both Raman spectroscopy and electrostatic force microscopy were performed. Laser light induced modifications are found to cause no structural changes. However, they have impact on Raman spectra and local charge state of the material. They are also shown to be stable in time and during electrical grounding of the sample. The mechanism of photoionization of deep defects present in h-BN is proposed to explain the observed phenomenon. The discussed effect opens up new method of nanostructurization of h-BN based planar heterostructures.
description: 9 pages, 5 figures
[Cahier du monde hispanique et luso-brésilien (Caravelle)]
[La presencia en la pregunta de la palabra "circunstancias"]
Creators: name: Jean, Andreu
name: Cortázar, Julio
name: Andreu, Jean
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2021
Subjects: Literatura y sociedad en América Latina
Cuestionario

description: Carta de Jean Andreu a Julio Cortázar a propósito de una encuesta para la revista Caravelle por un número dedicado a "Literatura y sociedad en América Latina ".
description: Respuesta de Julio Cortázar.
description: Destinatario: Cortázar, Julio
description: Andreu, Jean
description: Notas: Carta de Jean Andreu con membrete "Université de Toulouse–Le Mirail – Cahier du monde hispanique et luso-brésilien (Caravelle)".
description: Folio tapuscrito de Julio Cortázar con anotación manuscrita : "Encuesta de Jean Andreu".
description: Source: Num.Ref. : JC-DY-CAR-02.001
description: Source: Localización del archivo: Centre de Recherches Latino-Américaines (CRLA–Archivos, ITEM UMR8132). MSHS - Bât. A5, 1er étage 5 rue Théodore Lefebvre - TSA21103. 86073 Poitiers cedex 9.
description: created: 1983-06-30/1983-09-30
Calibration of the mirror system in the HERA-B RICH
Creators: name: Starič, Marko
name: Križan, Peter
Publisher: name: arXiv
Year: 2007
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: The mirror system of the HERA-B RICH consists of two spherical and two planar mirrors, composed of altogether 116 mirror segments. Analysis of displacements of the Čerenkov ring center relative to the charged particle track, for given spherical-planar segment pairs, leads to accurate information regarding the orientation of individual mirror segments. The method is described and the effect of applying the required corrections on the Čerenkov angle resolution of the HERA-B RICH is discussed.
Average number of zeros and mixed symplectic volume of Finsler sets
Creators: name: Akhiezer, Dmitri
name: Kazarnovskii, Boris
Publisher: name: arXiv
Year: 2018
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 52A39, 53C30, 58A05

description: Let $X$ be an $n$-dimensional manifold and $V_1, \ldots, V_n \subset C^\infty(X, \mathbb R)$ finite-dimensional vector spaces with Euclidean metric. We assign to each $V_i$ a Finsler ellipsoid, i.e., a family of ellipsoids in the fibers of the cotangent bundle of $X$. We prove that the average number of isolated common zeros of $f_1 \in V_1, \ldots, f_n \in V_n$ is equal to the mixed symplectic volume of these Finsler ellipsoids. If $X$ is a homogeneous space of a compact Lie group and all vector spaces $V_i$ and their Euclidean metrics are invariant, then the average numbers of zeros satisfy the inequalities, similar to Hodge inequalities for intersection numbers of divisors on a projective variety. This is applied to the eigenspaces of Laplace operator of an invariant Riemannian metric. The proofs are based on a construction of the ring of normal densities on $X$, an analogue of the ring of differential forms. In particular, this construction is used for a generalization of Crofton formula to the product of spheres.
description: 34 pages, one error corrected, several remarks and references added
Relay feedback excitation for identification of Fuel Cell performance parameters
Creators: name: Halvorsen, Ivar
name: Zenith, Federico
Publisher: name: Zenodo
Year: 2019

description: Fuel cell technology is emerging as a zero-emission power generation alternative. Durability is a critical factor and it is therefore important to monitor degradation parameters that can be used for prognostics of remaining useful life and to take precautions to optimize the lifecycle. The Giantleap project is founded by EU through the Horizon 2020 programme and focuses on these issues for automotive applications in Fuel-Cell Electric buses. One interesting parameter is the so-called low frequency intercept resistance (LFR). From basic studies of performance degradation, it has been observed that changes in this parameter correlate well with ageing, making it an interesting indicator to measure (Pivac et.al., 2018). A key issue is that dynamic excitation is needed to identify this parameter, since it is not observable in steady state. It is simply the low frequency point of the Nyquist diagram of the Fuel Cell impedance where the phase crosses through zero while passing from positive to negative phase angle. In a laboratory, this can be measured by performing Electrochemical Impedance Spectroscopy (EIS). However, this requires special equipment and is not practical (or possible) to do for a fuel cell stack that is an integrated component in an application.
 In the control community, the celebrated relay feedback excitation method (Åström and Hägglund, 1995) is used to directly identify the ultimate- gain and frequency of an unknown process: the result can e.g. be used for tuning of PID controllers. Here, this excitation technique is adapted to obtain direct identification of the interesting low frequency intercept point (Halvorsen et. al., 2019). Results from simulations and from testing on fuel cell stacks will be presented. The simple relay excitation method can be implemented as a software component in typical fuel cell control systems without any extra hardware equipment.
Degeneracies between Modified Gravity and Baryonic Physics
Creators: name: Ellewsen, Thor A. S.
name: Falck, Bridget
name: Mota, David F.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: In order to determine the observable signatures of modified gravity theories, it is important to consider the effect of baryonic physics. We use a modified version of the ISIS code to run cosmological hydrodynamic simulations to study degeneracies between modified gravity and radiative hydrodynamical processes. Of these, one was the standard $Λ$CDM model and four were variations of the Symmetron model. For each model we ran three variations of baryonic processes: non-radiative hydrodynamics; cooling and star formation; and cooling, star formation, and supernova feedback. We construct stacked gas density, temperature, and dark matter density profiles of the halos in the simulations, and study the differences between them. We find that both radiative variations of the models show degeneracies between their processes and at least two of the three parameters defining the Symmetron model.
description: 9 pages, 4 figures, matches version accepted to A&A
Measuring Hopf links and Hopf invariants in a quenched topological Raman lattice
Creators: name: Yu, Jinlong
Publisher: name: arXiv
Year: 2018
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: In a recent experimental work [Z. Wu et al., Science 354, 83 (2016)], the PKU-USTC group realized a two-dimensional two-band quantum anomalous Hall model on a square Raman lattice. By quenching the atom-laser detuning of such a Raman lattice, the time-dependent Bloch vectors for each quasimomentum points define a Hopf mapping from quasimomentum-time space $(k_x,k_y,t)\in T^3$ to the Bloch sphere $S^2$. The Hopf links between the preimages of any two Bloch vectors on $S^2$ can be measured experimentally through Bloch state tomography using spin-resolved time-of-flight measurement together with suitable radio-frequency manipulations. The dynamical Hopf invariants, which are quasimomentum-time integrations of Chern-Simons densities, can also be extracted experimentally through certain quench processes. As the Hopf invariant equals the Chern number of the post-quench Hamiltonian, the measurements of Hopf links and Hopf invariants provide an alternative way of understanding the topological phase diagram of the equilibrium system.
description: 7 pages, 6 figures. Some references are added
Ac Stark Effects and Harmonic Generation in Periodic Potentials
Creators: name: Holthaus, Martin
name: Hone, Daniel W.
Publisher: name: arXiv
Year: 1993
Subjects: subject: Condensed Matter (cond-mat)
subject: FOS: Physical sciences

description: The ac Stark effect can shift initially nonresonant minibands in semiconductor superlattices into multiphoton resonances. This effect can result in strongly enhanced generation of a particular desired harmonic of the driving laser frequency, at isolated values of the amplitude.
description: RevTeX, 10 pages (4 figures available on request), Preprint UCSBTH-93-24
Refined stratigraphy of loess-paleosol-sequences from the Schwalbenberg near Remagen (Middle Rhine valley, Germany) : paleoenvironmental and archeological implications
Creators: name: Fischer, Peter
name: Jöris, Olaf
name: Vött, Andreas
name: Fitzsimmons, Kathryn
name: Vinnepand, Mathias
name: Hambach, Ulrich
name: Prud'homme, Charlotte
name: Schulte, Philipp
name: Lehmkuhl, Frank
name: Schirmer, Wolfgang
Publisher: name: RWTH Aachen University
Year: 2019

description: International Workshop on Loess and Archeology : Geoarcheological and paleoenvironmental research in European loess-scapes : Abstract Book / Herausgeber: Prof. Dr. Frank Lehmkuhl, Lehrstuhl für Physische Geographie und Geoökologie ; Editoren: Dr. Janina Bösken, Prof. Dr. Jürgen Richter, Prof. Dr. Frank Lehmkuhl International Workshop on Loess and Archeology, WLA 2019, Aachen, Germany, 27 Nov 2019 - 29 Nov 2019; Aachen : Lehrstuhl für Physische Geographie und Geoökologie 23-24 (2019).
description: Published by Lehrstuhl für Physische Geographie und Geoökologie, Aachen
Current issues in Romanian Paleolithic chronology
Creators: name: Doboș, Adrian
Publisher: name: RWTH Aachen University
Year: 2019

description: International Workshop on Loess and Archeology : Geoarcheological and paleoenvironmental research in European loess-scapes : Abstract Book / Herausgeber: Prof. Dr. Frank Lehmkuhl, Lehrstuhl für Physische Geographie und Geoökologie ; Editoren: Dr. Janina Bösken, Prof. Dr. Jürgen Richter, Prof. Dr. Frank Lehmkuhl International Workshop on Loess and Archeology, WLA 2019, Aachen, Germany, 27 Nov 2019 - 29 Nov 2019; Aachen : Lehrstuhl für Physische Geographie und Geoökologie 22-22 (2019).
description: Published by Lehrstuhl für Physische Geographie und Geoökologie, Aachen
Colonial Exchange Systems and the Decline of Paquime
Creators: name: R. A. Pailes
name: Reff, Daniel T.
Publisher: name: Society for American Archaeology
Year: 1980
Subjects: subject: Casas Grandes
valueUri: https://core.tdar.org/browse/geographic-keyword/46319/casas-grandes
subject: Rio Sanora
valueUri: https://core.tdar.org/browse/culture-keyword/9310/rio-sanora
subject: Mogollon
valueUri: https://core.tdar.org/browse/culture-keyword/34/mogollon
subject: Hohokam
valueUri: https://core.tdar.org/browse/culture-keyword/21/hohokam
subject: Huhugam
valueUri: https://core.tdar.org/browse/culture-keyword/8166/huhugam
subject: Paquime
valueUri: https://core.tdar.org/browse/site-name/257/paquime
subject: Casas Grandes
valueUri: https://core.tdar.org/browse/site-name/279/casas-grandes
subject: Town / City
valueUri: https://core.tdar.org/browse/site-type/255/town-city
subject: Domestic Structure or Architectural Complex
valueUri: https://core.tdar.org/browse/site-type/251/domestic-structure-or-architectural-complex
subject: Settlements
valueUri: https://core.tdar.org/browse/site-type/252/settlements

description: We suggest that the failure of Casas Grandes was inevitable. In the absence of advanced transportation technology, a monopolistic dendritic exchange system failed to develop. In its place, the administered market system was inadequate to control the local economies beyond the Casas Grandes province. Stimulated by Casas Grandes, the local economies eventually began to compete with the merchant-priests. While such competition may not have been large scale, its cumulative effect would have been enough to rob Casas Grandes of the profit levels needed to maintain a colonial enterprise. In the end, the city was destroyed with its warehouses filled with unsold stock, but an extensive and healthy exchange economy continued long afterward.
Using refittings of lithic artefacts to test a site formation model for the Gravettian site of Krems-Wachtberg
Creators: name: Händel, Marc
name: Thomas, Roswitha
name: Simon, Ulrich
name: Brandl, Michael
name: Einwögerer, Thomas
Publisher: name: RWTH Aachen University
Year: 2019

description: International Workshop on Loess and Archeology : Geoarcheological and paleoenvironmental research in European loess-scapes : Abstract Book / Herausgeber: Prof. Dr. Frank Lehmkuhl, Lehrstuhl für Physische Geographie und Geoökologie ; Editoren: Dr. Janina Bösken, Prof. Dr. Jürgen Richter, Prof. Dr. Frank Lehmkuhl International Workshop on Loess and Archeology, WLA 2019, Aachen, Germany, 27 Nov 2019 - 29 Nov 2019; Aachen : Lehrstuhl für Physische Geographie und Geoökologie 28-28 (2019).
description: Published by Lehrstuhl für Physische Geographie und Geoökologie, Aachen
First detection of polarized scattered light from an exoplanetary atmosphere
Creators: name: Berdyugina, S. V.
name: Berdyugin, A. V.
name: Fluri, D. M.
name: Piirola, V.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report the first direct detection of an exoplanet in the visible polarized light. The transiting planet HD189733b is one of the very hot Jupiters with shortest periods and, thus, smallest orbits, which makes them ideal candidates for polarimetric detections. We obtained polarimetric measurements of HD189733 in the $B$ band well distributed over the orbital period and detected two polarization maxima near planetary elongations with a peak amplitude of $\sim2\cdot10^{-4}$. Assuming Rayleigh scattering, we estimated the effective size of the scattering atmosphere (Lambert sphere) to be 1.5$\pm$0.2 $R_{\rm J}$, which is 30% larger than the radius of the opaque body previously inferred from transits. If the scattering matter fills the planetary Roche lobe, the lower limit of the geometrical albedo can be estimated as 0.14. The phase dependence of polarization indicates that the planetary orbit is oriented almost in a north-south direction with a longitude of ascending node $Ω$=(16\degr or 196\degr)$\pm$8\degr. We obtain independent estimates of the orbit inclination $i$=98\degr$\pm$8\degr and eccentricity $e$=0.0 (with an uncertainty of 0.05) which are in excellent agreement with values determined previously from transits and radial velocities. Our findings clearly demonstrate the power of polarimetry and open a new dimension in exploring exoplanetary atmospheres even for systems without transits.
description: accepted in ApJL
Etricourt-Manancourt (Somme, France) : A Reference loess sequence and archaeological site for the last 350 ka
Creators: name: Hérisson, David
name: Coutard, Sylvie
name: Goval, Emilie
name: Locht, Jean-Luc
name: Antoine, Pierre
name: Chantreau, Yoann
name: Pirson, Stéphane
name: Spagna, Paolo
name: Balescu, Sanda
name: Debenham, Nick
name: Forget Brisson, Laurence
name: Barré, Magali
name: Giros, Romain
name: Lamothe, Michel
Publisher: name: RWTH Aachen University
Year: 2019

description: International Workshop on Loess and Archeology : Geoarcheological and paleoenvironmental research in European loess-scapes : Abstract Book / Herausgeber: Prof. Dr. Frank Lehmkuhl, Lehrstuhl für Physische Geographie und Geoökologie ; Editoren: Dr. Janina Bösken, Prof. Dr. Jürgen Richter, Prof. Dr. Frank Lehmkuhl International Workshop on Loess and Archeology, WLA 2019, Aachen, Germany, 27 Nov 2019 - 29 Nov 2019; Aachen : Lehrstuhl für Physische Geographie und Geoökologie 29-30 (2019).
description: Published by Lehrstuhl für Physische Geographie und Geoökologie, Aachen
Correcting Projection Effects in CMEs using GCS-based Large Statistics of Multi-viewpoint Observations
Creators: name: Gandhi, Harshita
name: Patel, Ritesh
name: Pant, Vaibhav
name: Majumdar, Satabdwa
name: Pal, Sanchita
name: Banerjee, Dipankar
name: Morgan, Huw
Publisher: name: arXiv
Year: 2024
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: This study addresses the limitations of single-viewpoint observations of Coronal Mass Ejections (CMEs) by presenting results from a 3D catalog of 360 CMEs during solar cycle 24, fitted using the GCS model. The dataset combines 326 previously analyzed CMEs and 34 newly examined events, categorized by their source regions into active region (AR) eruptions, active prominence (AP) eruptions, and prominence eruptions (PE). Estimates of errors are made using a bootstrapping approach. The findings highlight that the average 3D speed of CMEs is $\sim$1.3 times greater than the 2D speed. PE CMEs tend to be slow, with an average speed of 432 km $s^{-1}$. AR and AP speeds are higher, at 723 km $s^{-1}$ and 813 km $s^{-1}$, respectively, with the latter having fewer slow CMEs. The distinctive behavior of AP CMEs is attributed to factors like overlying magnetic field distribution or geometric complexities leading to less accurate GCS fits. A linear fit of projected speed to width gives a gradient of 2 km $s^{-1}deg^{-1}$, which increases to 5 km $s^{-1}deg^{-1}$ when the GCS-fitted `true' parameters are used. Notably, AR CMEs exhibit a high gradient of 7 km $s^{-1}deg^{-1}$, while AP CMEs show a gradient of 4 km $s^{-1}deg^{-1}$. PE CMEs, however, lack a significant speed-width relationship. We show that fitting multi-viewpoint CME images to a geometrical model such as GCS is important to study the statistical properties of CMEs, and can lead to a deeper insight into CME behavior that is essential for improving future space weather forecasting.
description: Accepted for publication in Space Weather Journal
Importance of orbital fluctuations for the magnetic dynamics in heavy-fermion compound SmB$_6$
Creators: name: Singh, Christopher N.
name: Lee, Wei-Cheng
Publisher: name: arXiv
Year: 2018
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The emergent dynamical processes associated with magnetic excitations in heavy-fermion SmB$_6$ are investigated. By imposing multiorbital interactions on a first-principles model, we find the interplay between spin and orbital fluctuations in the $f$ manifold is highly sensitive to local correlations. The magnetic phase diagram constructed at zero temperature reveals quantum critical features with the existence of several competing phases. Within the random phase approximation, we perform a comprehensive study of the spin-spin correlation function, and our results agree with neutron scattering experiments. Spectral weight analysis shows the low energy spin excitations are selectively accompanied by orbital fluctuations, indicating a non-trivial entanglement between the spin and orbital degree of freedom driven by relativistic couplings.
description: 5 pages, 5 figures
Three Essays on Boredom
Creators: name: Markey, Amanda Rose
Publisher: name: Carnegie Mellon University
Year: 2014
Subjects: subject: 170202 Decision Making
subject: FOS: Psychology

description: Boredom has consistently been recognized as a powerful emotion that pervades modern society. Yet despite academic, literary, and media commentaries on boredom’s importance, it has historically received sporadic and sparse attention from scientific researchers. This trend of neglect has begun to change course, and researchers have recently made progress in measuring boredom in a given situation, generating a theory of boredom to account for its various causes, and documenting the correlates of boredom proneness. Nevertheless, some significant gaps remain. This dissertation contributes to the rising tide of boredom research by addressing three gaps in the literature. First, the majority of past researchers have confined their examination of boredom to one-shot surveys and laboratory studies, which has narrowed the shape of research questions and can limit the external validity of findings. The first empirical paper (Chapter 2) leverages a rich experience sampling dataset to document boredom’s prevalence, examine its situational and demographic correlates, and explore whether situational differences can account for group differences (e.g., whether men are more bored than women because of differences in how they spend their time). In addition to the gap in empirical work outside the laboratory, the work on boredom inside the laboratory is characterized by a significant methodological limitation, the lack of a validated boredom elicitation task. The second empirical paper (Chapter 3) addresses this methodological gap by testing and comparing the effectiveness of boredom inductions. This necessary methodological development contributes to the internal validity of laboratory experiments, which are indispensable in addressing boredom’s causal factors. Recently, a comprehensive theory outlining boredom’s function and causal determinants was proposed (Kurzban, Duckworth, Kable, & Myers, 2013). However, this theory has not been empirically tested, the main goal of the third essay (Chapter 4). These three essays contribute to empirical knowledge about the experience of boredom in everyday life, provide a validated methodological tool necessary to manipulate boredom in controlled laboratory settings, and advance the development of a comprehensive theory of state boredom that can be used to predict boredom’s occurrence and inform interventions. Taken together, these essays characterize the nature of boredom in society and help explain when, and why, this interesting emotion occurs.
Image Colorization with Generative Adversarial Networks
Creators: name: Nazeri, Kamyar
name: Ng, Eric
name: Ebrahimi, Mehran
Publisher: name: arXiv
Year: 2018
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Over the last decade, the process of automatic image colorization has been of significant interest for several application areas including restoration of aged or degraded images. This problem is highly ill-posed due to the large degrees of freedom during the assignment of color information. Many of the recent developments in automatic colorization involve images that contain a common theme or require highly processed data such as semantic maps as input. In our approach, we attempt to fully generalize the colorization procedure using a conditional Deep Convolutional Generative Adversarial Network (DCGAN), extend current methods to high-resolution images and suggest training strategies that speed up the process and greatly stabilize it. The network is trained over datasets that are publicly available such as CIFAR-10 and Places365. The results of the generative model and traditional deep neural networks are compared.
description: Lecture Notes in Computer Science, Proceedings of tenth international conference on Articulated Motion and Deformable Objects (AMDO), Palma, Mallorca, Spain, 12-13 July 2018
Pseudoscalar or vector meson production in non-leptonic decays of heavy hadrons
Creators: name: Liang, Wei-Hong
name: Oset, E.
Publisher: name: arXiv
Year: 2018
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We have addressed the study of non-leptonic weak decays of heavy hadrons ($Λ_b, Λ_c, B$ and $D$), with external and internal emission to give two final hadrons, taking into account the spin-angular momentum structure of the mesons and baryons produced. A detailed angular momentum formulation is developed which leads to easy final formulas. By means of them we have made predictions for a large amount of reactions, up to a global factor, common to many of them, that we take from some particular data. Comparing the theoretical predictions with the experimental data, the agreement found is quite good in general and the discrepancies should give valuable information on intrinsic form factors, independent of the spin structure studied here. The formulas obtained are also useful in order to evaluate meson-meson or meson-baryon loops, for instance of $B$ decays, in which one has PP, PV, VP or VV intermediate states, with P for pseudoscalar mesons and V for vector meson and lay the grounds for studies of decays into three final particles.
description: 54 pages, 7 figures, 13 tables; v2: 60 pages, 9 figures, 14 tables, discussion added, references added, version to appear in Eur.Phys.J. C
Nearby Galaxies and the Ginga X-ray Background
Creators: name: Carrera, F. J.
name: Barcons, X.
name: Butcher, J. A.
name: Fabian, A. C.
name: Lahav, O.
name: Stewart, G. C.
name: Warwick, R. S.
Publisher: name: arXiv
Year: 1994
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present here the results of cross-correlating the X-ray background measured by Ginga in the 2-10 keV band with several catalogues of extragalactic objects. Positive signals with an amplitude of a few per cent have been found for some catalogues implying that some fraction of the X-ray background is produced either by the class of catalogued sources or by other classes spatially related to them. Detailed X-ray background simulations have been used to assess the significance of the results and, for the first time, the full angular shape of the cross-correlation. The inferred X-ray volume emissivity in the local Universe, j_0, has been estimated for two galaxy catalogues (UGC and IRAS) for which the cross-correlation is highly significant. We obtain j_0= (0.74 +/- 0.07) for UGC and j_0= (1.15 +/- 0.10) for IRAS, in units of 1.E39 h erg/s/Mpc3. Extrapolating this result back to z~1-4 leads to the conclusion that
description: 20 pages, 11 compressed uuencoded figures appended at the end Submitted to MNRAS
EXPERIENCE OF FOREIGN COUNTRIES IN DECLARING A SEARCH FOR PERSONS WHO HAVE COMMITTED CRIMES AND GONE INTO HIDING
Creators: name: Murodov, Bakhtiyorjon
name: Boltaboyev, Odiljon
Publisher: name: Zenodo
Year: 2025

description: This article provides a legal analysis of the experience of foreign countries in declaring wanted persons who are hiding from inquiry and investigation bodies and evading criminal punishment. The author has developed proposals and recommendations for improving this field.
Radio-astronomical Image Reconstruction with Conditional Denoising Diffusion Model
Creators: name: Drozdova, Mariia
name: Kinakh, Vitaliy
name: Bait, Omkar
name: Taran, Olga
name: Lastufka, Erica
name: Dessauges-Zavadsky, Miroslava
name: Holotyak, Taras
name: Schaerer, Daniel
name: Voloshynovskiy, Slava
Publisher: name: arXiv
Year: 2024
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Artificial Intelligence (cs.AI)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Reconstructing sky models from dirty radio images for accurate source localization and flux estimation is crucial for studying galaxy evolution at high redshift, especially in deep fields using instruments like the Atacama Large Millimetre Array (ALMA). With new projects like the Square Kilometre Array (SKA), there's a growing need for better source extraction methods. Current techniques, such as CLEAN and PyBDSF, often fail to detect faint sources, highlighting the need for more accurate methods. This study proposes using stochastic neural networks to rebuild sky models directly from dirty images. This method can pinpoint radio sources and measure their fluxes with related uncertainties, marking a potential improvement in radio source characterization. We tested this approach on 10164 images simulated with the CASA tool simalma, based on ALMA's Cycle 5.3 antenna setup. We applied conditional Denoising Diffusion Probabilistic Models (DDPMs) for sky models reconstruction, then used Photutils to determine source coordinates and fluxes, assessing the model's performance across different water vapor levels. Our method showed excellence in source localization, achieving more than 90% completeness at a signal-to-noise ratio (SNR) as low as 2. It also surpassed PyBDSF in flux estimation, accurately identifying fluxes for 96% of sources in the test set, a significant improvement over CLEAN+ PyBDSF's 57%. Conditional DDPMs is a powerful tool for image-to-image translation, yielding accurate and robust characterisation of radio sources, and outperforming existing methodologies. While this study underscores its significant potential for applications in radio astronomy, we also acknowledge certain limitations that accompany its usage, suggesting directions for further refinement and research.
description: In production in Astronomy&Astrophyics
The Role of Galaxies and AGN in Reionising the IGM - I: Keck Spectroscopy of 5 < z < 7 Galaxies in the QSO Field J1148+5251
Creators: name: Kakiichi, Koki
name: Ellis, Richard S.
name: Laporte, Nicolas
name: Zitrin, Adi
name: Eilers, Anna-Christina
name: Ryan-Weber, Emma
name: Meyer, Romain A.
name: Robertson, Brant
name: Stark, Daniel P.
name: Bosman, Sarah E. I.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We introduce a new method for determining the influence of galaxies and active galactic nuclei (AGN) on the physical state of the intergalactic medium (IGM) at high redshift and illustrate its potential via a first application to the field of the $z=6.42$ QSO J1148+5251. By correlating the spatial positions of spectroscopically-confirmed Lyman break galaxies (LBGs) with fluctuations in the Lyman alpha forest seen in the high signal-to-noise spectrum of a background QSO, we provide a statistical measure of the typical escape fraction of Lyman continuum photons close to the end of cosmic reionisation. Here we use Keck DEIMOS spectroscopy to locate 7 colour-selected LBGs in the redshift range $5.3\lesssim z\lesssim 6.4$ and confirm a faint $z=5.701$ AGN. We then examine the spatial correlation between this sample and Ly$α$/Ly$β$ transmission fluctuations in a Keck ESI spectrum of the QSO. Interpreting the statistical HI proximity effect as arising from faint galaxies clustered around the detected LBGs, we translate the observed mean Ly$α$ transmitted flux around an average detected LBG into a constraint on the mean escape fraction $\langle f_{\rm esc}\rangle\geq0.08$ at $z\simeq6$. We also report evidence of the individual transverse HI proximity effect of a $z=6.177$ luminous LBG via a Ly$β$ transmission spike and two broad Ly$α$ transmission spikes around the $z=5.701$ AGN. We discuss the possible origin of such associations which suggest that while faint galaxies are primarily driving reionisation, luminous galaxies and AGN may provide important contributions to the UV background or thermal fluctuations of the IGM at $z\simeq6$. Although a limited sample, our results demonstrate the potential of making progress using this method in resolving one of the most challenging aspects of the contribution of galaxies and AGN to cosmic reionisation.
description: 21 pages, 16 figures, the version accepted in MNRAS
Nobel Nominee Professor Dr. Engr. Md. Anowar Hossain, Defence Scientist is requesting to Mr. António Guterres, Secretary-General of United Nations for a legal stipend or legal award to proceed with legal proceeding of life-threatening conspiracy in Australian PhD school
Creators: name: Anowar, Md. Anowar Hossain
Publisher: name: Zenodo
Year: 2025

description: Keynote of the case letter

The occurrence in international PhD school is a PhD tragedy in Australian PhD school. Nobel Nominee Professor Dr. Engr. Md. Anowar Hossain, Defence Scientist has faced life-threatening conspiracy and PhD conspiracy in Australian PhD School at School of Fashion and Textiles, RMIT University, Melbourne, Australia since 2021-2022. Therefore, Dr. Md. Anowar Hossain is requesting to Mr. António Guterres, Secretary-General of the United Nations (UN) for a legal stipend or legal award to proceed with legal proceeding in international court in international PhD school. UN should be liable to take necessary action against international criminals. Accordingly, Nobel Nominee Professor Dr. Engr. Md. Anowar Hossain, Defence Scientist has scholarly inventions and long-term investment from 2021-2022. Under the action and support of the UN, every national and international political leader is being requested to extend their ethical beauty to take necessary action against international criminals. Let’s shout and shout for a ‘criminal free’ world which may enhance the global survival capability, global peace, peace in PhD school, and lifetime of the peoples.
Exploring semi-inclusive two-nucleon emission in neutrino scattering: a factorized approximation approach
Creators: name: Martinez-Consentino, V. L.
name: Amaro, J. E.
Publisher: name: arXiv
Year: 2024
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The semi-inclusive cross section of two-nucleon emission induced by neutrinos and antineutrinos is computed employing the relativistic mean field model of nuclear matter and the dynamics of meson exchange currents. Within this model we explore a factorization approximation based on the product of an integrated two-hole spectral function and a two-nucleon cross section averaged over hole pairs. We demonstrate that the integrated spectral function of the uncorrelated Fermi gas can be analytically computed, and we derive a simple fully relativistic formula for this function, showcasing its dependency solely on both missing momentum and missing energy. A prescription for the average momenta of the two holes in the factorized two-nucleon cross section is provided, assuming that these momenta are perpendicular to the missing momentum in the center-of-mass system. The validity of the factorized approach is assessed by comparing it with the unfactorized calculation. Our investigation includes the study of the semi-inclusive cross section integrated over the energy of one of the emitted nucleons and the cross section integrated over the emission angles of the two nucleons and the outgoing muon kinematics. A comparison is made with the pure phase-space model and other models from the literature. The results of this analysis offer valuable insights into the influence of the semi-inclusive hadronic tensor on the cross section, providing a deeper understanding of the underlying nuclear processes.
description: 34 pages, 16 figures
Matter Coupling and Spontaneous Symmetry Breaking in Topological Gravity
Creators: name: Burwick, T. T.
name: Chamseddine, A. H.
name: Meissner, K.
Publisher: name: arXiv
Year: 1992
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Matter is coupled to three-dimensional gravity such that the topological phase is allowed and the (anti-) de Sitter or Poincaré symmetry remains intact. Spontaneous symmetry breaking to the Lorentz group occurs if a scalar field is included. This Higgs field can then be used to couple matter so that the familiar form of the matter coupling is established in the broken phase. We also give the supersymmetrization of this construction.
description: 12 pages
Three Dimensional Nonlinear Soil and Site-City Effects in Urban Regions
Creators: name: Taborda, Ricardo
Publisher: name: Carnegie Mellon University
Year: 2010
Subjects: subject: 90799 Environmental Engineering not elsewhere classified
subject: FOS: Environmental engineering
subject: 90599 Civil Engineering not elsewhere classified
subject: FOS: Civil engineering

description: The main objective of this thesis is to build a framework for performing earthquake simulations capable of including nonlinear soil behavior and the presence of the built environment in highly heterogeneous basins, and to study their influence on the final response of the ground in large urban areas exposed to high seismic hazard. To this end, we use a finite elements approach and extend the capabilities of Hercules, the parallel octree-based earthquake simulator developed by the Quake Group at Carnegie Mellon. Nonlinear soil behavior is incorporated in ground motion simulations employing a rate-dependent plasticity approach to predict the nonlinear state of the material explicitly at every time step. The soil is modeled as a perfectly elastoplastic material. The presence of urban structures is modeled representing buildings as homogeneous blocks made up of the same type of hexahedral elements used in the mesh. These elements are generated automatically through a new set of application programming interfaces, which extend Hercules' meshing capabilities while preserving its core octree-based formulation. Both implementations are tested under realistic earthquake conditions in heterogeneous geological structures. In the case of nonlinear ground motion modeling, results indicate that soil nonlinearities greatly modify the ground response, confirming previous observations for deamplification effects and spatial variability, and evidencing three-dimensional basin effects not fully observed before. In turn, the presence of building clusters causes multiple soil-structure interaction phenomena that change both the near ground-motion and the individual performance of the buildings themselves. This substantiates the argument that in soft-soil basins may it not be longer valid to ignore the presence of neighboring structures. These new implementations represent important advances in computational seismology and help make a direct connection to subjects of interest in earthquake engineering. The analysis drawn from the applications presented here confirms aspects known from previous, though limited studies, and broadens our knowledge of the effects of nonlinear soil and the built environment on the ground motion due to earthquakes at a regional level not explored before.
Gaia Data Release 2: Photometric content and validation
Creators: name: Evans, D. W.
name: Riello, M.
name: De Angeli, F.
name: Carrasco, J. M.
name: Montegriffo, P.
name: Fabricius, C.
name: Jordi, C.
name: Palaversa, L.
name: Diener, C.
name: Busso, G.
name: Cacciari, C.
name: van Leeuwen, F.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Aims. We describe the photometric content of the second data release of the Gaia project (Gaia DR2) and its validation along with the quality of the data. Methods. The validation was mainly carried out using an internal analysis of the photometry. External comparisons were also made, but were limited by the precision and systematics that may be present in the external catalogues used. Results. In addition to the photometric quality assessment, we present the best estimates of the three photometric passbands. Various colour-colour transformations are also derived to enable the users to convert between the Gaia and commonly used passbands. Conclusions. The internal analysis of the data shows that the photometric calibrations can reach a precision as low as 2 mmag on individual CCD measurements. Other tests show that systematic effects are present in the data at the 10 mmag level.
description: This version has corrections to Appendix A. All the SDSS transformations have been corrected. Tables A.1 and A.2 have changed for the SDSS relationships. Three of the subfigures in Figure A.1 have changed. The author list has been expanded
Middle Pleniglacial pedogenetic dynamics of the peri-Carpathian zone
Creators: name: Hošek, Jan
name: Lisá, Lenka
name: Adameková, Katarína
name: Bajer, Aleš
name: Moska, Piotr
Publisher: name: RWTH Aachen University
Year: 2019

description: International Workshop on Loess and Archeology : Geoarcheological and paleoenvironmental research in European loess-scapes : Abstract Book / Herausgeber: Prof. Dr. Frank Lehmkuhl, Lehrstuhl für Physische Geographie und Geoökologie ; Editoren: Dr. Janina Bösken, Prof. Dr. Jürgen Richter, Prof. Dr. Frank Lehmkuhl International Workshop on Loess and Archeology, WLA 2019, Aachen, Germany, 27 Nov 2019 - 29 Nov 2019; Aachen : Lehrstuhl für Physische Geographie und Geoökologie 66-67 (2019).
description: Published by Lehrstuhl für Physische Geographie und Geoökologie, Aachen
Book Review: Immigration and Estrangement in Indian Diaspora Literature: A Critical Study (2019)
Creators: name: Himani LVL
Publisher: name: Zenodo
Year: 2024

description: Book Review of -

Immigration and Estrangement in Indian Diaspora Literature: A Critical Study (2019)

ISBN: 978-93-88963-43-5 Ed. Dipak Giri. AABS Publishing House

 

Reviewer

Dr Himani LVL

Assistant Professor, Department of BS & HSS, Andhra University College of Engineering for Women, Visakhapatnam
Model based dust cycle over Europe during the Last Glacial Maximum
Creators: name: Ludwig, Patrick
name: Schaffernicht, Erik
name: Shao, Yaping
Publisher: name: RWTH Aachen University
Year: 2019

description: International Workshop on Loess and Archeology : Geoarcheological and paleoenvironmental research in European loess-scapes : Abstract Book / Herausgeber: Prof. Dr. Frank Lehmkuhl, Lehrstuhl für Physische Geographie und Geoökologie ; Editoren: Dr. Janina Bösken, Prof. Dr. Jürgen Richter, Prof. Dr. Frank Lehmkuhl International Workshop on Loess and Archeology, WLA 2019, Aachen, Germany, 27 Nov 2019 - 29 Nov 2019; Aachen : Lehrstuhl für Physische Geographie und Geoökologie 37-37 (2019).
description: Published by Lehrstuhl für Physische Geographie und Geoökologie, Aachen
Rigorous decoupling between edge states in frustrated spin chains and ladders
Creators: name: Chepiga, Natalia
name: Mila, Frédéric
Publisher: name: arXiv
Year: 2018
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We investigate the occurrence of exact zero modes in one-dimensional quantum magnets of finite length that possess edge states. Building on conclusions first reached in the context of the spin-1/2 XY chain in a field, then for the spin-1 $J_1-J_2$ Heisenberg model, we show that the development of incommensurate correlations in the bulk invariably leads to oscillations in the sign of the coupling between edge states, hence to exact zero energy modes at the crossing points where the coupling between the edge states rigorously vanishes. This is true regardless of the origin of the frustration (e.g. next-nearest neighbor coupling or biquadratic coupling for the spin-1 chain), of the value of the bulk spin (we report on spin-1/2, spin-1 and spin-2 examples), and of the value of the edge-state emergent spin (spin-1/2 or spin-1).
description: 8 pages, 14 figures
How warm were summers during the LGM in the southeastern Carpathian Basin?
Creators: name: Markovic, Slobodan B.
name: Sümegi, Pál
name: Gavrilov, Milivoj B.
name: Ruman, Albert
name: Molnár, David
name: Veres, Daniel
name: Hambach, Ulrich
name: Obreht, Igor
name: Zeeden, Christian Johannes
name: Radaković, Milica
name: Bösken, Janina Johanna
name: Ludwig, Patrick
name: Lehmkuhl, Frank
Publisher: name: RWTH Aachen University
Year: 2019

description: International Workshop on Loess and Archeology : Geoarcheological and paleoenvironmental research in European loess-scapes : Abstract Book / Herausgeber: Prof. Dr. Frank Lehmkuhl, Lehrstuhl für Physische Geographie und Geoökologie ; Editoren: Dr. Janina Bösken, Prof. Dr. Jürgen Richter, Prof. Dr. Frank Lehmkuhl International Workshop on Loess and Archeology, WLA 2019, Aachen, Germany, 27 Nov 2019 - 29 Nov 2019; Aachen : Lehrstuhl für Physische Geographie und Geoökologie 39-39 (2019).
description: Published by Lehrstuhl für Physische Geographie und Geoökologie, Aachen
Geomorphology and (paleo) loess landscapes in Europe during the last glacial cycle at different spatial and temporal scales
Creators: name: Lehmkuhl, Frank
name: Bösken, Janina Johanna
name: Antoine, Pierre
name: Boemke, Bruno
name: Hošek, Jan
name: Jary, Zdzisław
name: Markovic, Slobodan B.
name: Obreht, Igor
name: Pötter, Stephan
name: Sprafke, Tobias
name: Veres, Daniel
name: Viehweger, Jonas
name: Wacha, Lara
name: Zerboni, Andrea
name: Hambach, Ulrich
Publisher: name: RWTH Aachen University
Year: 2019

description: International Workshop on Loess and Archeology : Geoarcheological and paleoenvironmental research in European loess-scapes : Abstract Book / Herausgeber: Prof. Dr. Frank Lehmkuhl, Lehrstuhl für Physische Geographie und Geoökologie ; Editoren: Dr. Janina Bösken, Prof. Dr. Jürgen Richter, Prof. Dr. Frank Lehmkuhl International Workshop on Loess and Archeology, WLA 2019, Aachen, Germany, 27 Nov 2019 - 29 Nov 2019; Aachen : Lehrstuhl für Physische Geographie und Geoökologie 71-72 (2019).
description: Published by Lehrstuhl für Physische Geographie und Geoökologie, Aachen