cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Modelos de ocupación para los castros costeros del Golfo Ártabro. Una propuesta metodológica
Creators: name: Nión-Álvarez, Samuel
Publisher: name: Zenodo
Year: 2021
Subjects: castros costeros, cultura castreña, Golfo Ártabro, SIG, modelo locacional

description: En este trabajo se presenta la metodología aplicada a un estudio local de los castros costeros del Golfo Ártabro, una región situada en el Noroeste de la Península Ibérica. Esta propuesta pretende obtener modelos locacionales que nos permitan comprender las estrategias de ocupación de las sociedades castreñas de la zona, así como ver como se relacionan, desde el punto de vista de la ocupación el territorio, con el mar y su entorno. Además, también se plantea una reflexión acerca del concepto “castro costero” y sus posibles interpretaciones y definiciones, pues se considera necesario para una correcta apli-cación de nuestra metodología delimitar este concepto de forma concisa. Para la obtención de dichos modelos, partimos de tres variables principales de análisis: altitud relativa respecto al mar, visibilidad y accesibilidad a la costa. La herramienta básica para la realización del análisis serán los SIG (Sistemas de Información Geográfica), debido a su practicidad y funcionalidad para acercarse a un registro escaso y fragmentario. En definitiva, la principal función de este trabajo es proponer una metodología que pueda aportar cierta información en lo relativo a los patrones de asentamiento básicos de los castros costeros en la región de estudio, procurando ampliar la (escasa) información arqueológica disponible, e intentando servir como base a futuras investigaciones que intenten recomponer la organización social y territorial de esta zona.
Lettre de Esprit-Claude-François Calvet à Jean-François Séguier, 1777-12-11
Creators: name: Calvet, Esprit-Claude-François
name: Esprit-Claude-François Calvet
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2021

description: [transcription] Vous devez avoir reçu ma dernière lettre, monsieur et cher ami, elle servait de réponse à celle que vous m’avez adressée depuis la réception de votre manuscrit, et vous faisait part en même temps des dispositions du sieur Guillermier graveur au sujet de votre camée, celle-ci est uniquement pour vous annoncer les oeuvres de Palissi commentées par M. Faujas; vous les recevrez avec ma lettre. M. Faujas a passé ici ces jours derniers en allant à Toulon, et m’a prié de vous faire parvenir cet ouvrage sans retardement. Il m’a montré, durant le peu de momens que nous avons passé ensemble, les planches de son grand ouvrage sur les anciens volcans du Vivarais, j’en connoissais déjà le prospectus, mais je n’ay pas été moins surpris d’y voir une aussi grande quantité de montagnes qui présentent des vestiges évidens d’un embrasement antérieur, qu’était notre globe dans ce temps-là. Je vous souhaite le bon jour et vous embrasse de tout mon coeur. Calvet.

Avignon, ce 11 décembre 1777.
description: [objet joint à la lettre] Livre
description: [description objet] Oeuvres de Palissy
description: [personnes citées] Barthélemy Faujas de Saint-Fond, M. Guillermier
description: [reférence bibliographique citée] Faujas de Saint-Fond, Barthélemy, Recherches sur les volcans éteints du Vivarais et du Velay, avec un discours sur les volcans brûlans, des mémoires analytiques sur les chorles, la zéolite, l. Palissy, Bernard, Œuvres... revues sur les exemplaires de la Bibliothèque du Roi, avec des notes par MM. Faujas de Saint-Fond et Gobet, Paris, Ruault, 1777.
description: Source: [lieu de Conservation] Nîmes, Bibliothèque Carré d'Art [cote]ms. 140, fol. 200
description: Source: ark:/12148/btv1b10015185m
Stylized Architecture, Design Patterns, and Objects
Creators: name: Monroe, Robert T.
name: Kompanek, Andrew J
name: Melton, Ralph
name: Garlan, David
Publisher: name: Carnegie Mellon University
Year: 2008
Subjects: subject: 89999 Information and Computing Sciences not elsewhere classified
subject: FOS: Computer and information sciences

description: Software system builders are increasingly recognizing the importance of exploiting design knowledge in the engineering of new systems. One way to do this is to define an architectural style for a collection of related systems. The style determines a coherent vocabulary of system design elements and rules for their composition. By structuring the design space for a family of related systems a style can, in principle, drastically simplify the process of building a system, reduce costs of implementation through reusable infrastructure, and improve system integrity through style-specific analyses and checks. Like architectural style, object-oriented design patterns attempt to capture and exploit design knowledge to ease the process of designing software systems and reusing proven designs. There are, however, significant differences in the roles and capabilities of architectural styles and object-oriented design patterns, as there are between architectural design and object-oriented design. In this paper we illustrate the relationship between software architecture and object-oriented design, as well as the relationship between architectural styles and design patterns. We begin by defining our terms and then proceed to compare and contrast the various approaches with examples.
Non-geometric heterotic backgrounds and 6D SCFTs/LSTs
Creators: name: Font, Anamaría
name: García-Etxebarria, Iñaki
name: Lust, Dieter
name: Massai, Stefano
name: Mayrhofer, Christoph
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study ${\mathcal N}=(1,0)$ six-dimensional theories living on defects of non-geometric backgrounds of the $E_8\times E_8$ and the $\text{Spin}(32)/{\mathbb Z}_2$ heterotic strings. Such configurations can be analyzed by dualizing to F-theory on elliptic K3-fibered non-compact Calabi-Yau threefolds. The majority of the resulting dual threefolds turn out to contain singularities which do not admit a crepant resolution. When the singularities can be resolved crepantly, the theories living on the defect are explicitly determined and reveal a form of duality in which distinct defects are described by the same IR fixed point. In particular, a subclass of non-geometric defects corresponds to SCFTs/LSTs arising from small heterotic instantons on ADE singularities.
description: Slightly extended version of the proceedings prepared for the 'Workshop on Geometry and Physics,' November 2016, Ringberg Castle, Germany; 16 pages
Superabsorption of light via quantum engineering
Creators: name: Higgins, K. D. B.
name: Benjamin, S. C.
name: Stace, T. M.
name: Milburn, G. J.
name: Lovett, B. W.
name: Gauger, E. M.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Almost 60 years ago Dicke introduced the term superradiance to describe a signature quantum effect: N atoms can collectively emit light at a rate proportional to N^2. Even for moderate N this represents a significant increase over the prediction of classical physics, and the effect has found applications ranging from probing exciton delocalisation in biological systems, to developing a new class of laser, and even in astrophysics. Structures that super-radiate must also have enhanced absorption, but the former always dominates in natural systems. Here we show that modern quantum control techniques can overcome this restriction. Our theory establishes that superabsorption can be achieved and sustained in certain simple nanostructures, by trapping the system in a highly excited state while extracting energy into a non-radiative channel. The effect offers the prospect of a new class of quantum nanotechnology, capable of absorbing light many times faster than is currently possible; potential applications of this effect include light harvesting and photon detection. An array of quantum dots or a porphyrin ring could provide an implementation to demonstrate this effect.
Style-Based Refinement for Software Architecture
Creators: name: Garlan, David
Publisher: name: Carnegie Mellon University
Year: 1985
Subjects: subject: 89999 Information and Computing Sciences not elsewhere classified
subject: FOS: Computer and information sciences

description: A question that frequently arises for architectural design is "When can I implement a design in style S1 using a design in style S2?" In this paper I propose a technique for structuring a solution to this kind of problem using the idea of substyles. This technique leads to a two-step process in which first, useful subsets of a family of architectures are identified, and second, refinement rules specific to these subsets are established. I will argue that this technique, in combination with an unconventional interpretation of refinement, clarifies how engineers actually carry out architectural refinement and provides a formal framework for establishing the correctness of those methods.
Unparticle Physics in the Moller Scattering
Creators: name: Sahin, I.
name: Sahin, B.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We investigate the virtual effects of vector unparticles in the Moller scattering. We derive the analytic expression for scattering amplitudes with unpolarized beams. We obtain 95% confidence level limits on the unparticle couplings $λ_{V}$ and $λ_{A}$ with integrated luminosity of $L_{int}=50, 500 fb^{-1}$ and $\sqrt{s}=100, 300$ and 500 GeV energies. We show that limits on $λ_{V}$ are more sensitive than $λ_{A}$.
description: 10 pages, 5 figures, 4 tables
Phenotypic and behavioural plasticity of Daphnia magna (Strauss) under salinity stress
Creators: name: de Sampaio Kalkuhl, Alice
name: Khudr, Mouhammad Shadi
name: Hager, Reinmar
Publisher: name: Zenodo
Year: 2021
Subjects: Daphnia magna
phenotypic plasticity
resilience
NMR
FTIR
salinity
survival

description: The crustacean Daphnia magna is a highly plastic model organism in ecotoxicology. However, the causal relationship between the behavioural plasticity and metabolic changes in reaction to stress in D. magna has been understudied and many of the findings regarding the species have not been revisited as new insights on zooplankton behaviour, metabolism and morphology emerged. Here I show that salinity affects both phenotypic and behavioural plasticity in D. magna through modification to individual size, pigmentation and behaviour with a swarm. Furthermore, individual D. magna in small populations are shown to be physically harmed by their diet causing eutrophication over long time periods. Populations grown in habitats of specific salinities display differences in behavioural and phenotypic plasticity apparent in their swarming behaviour and population dynamics following an exposure. Slight salinity changes were confirmed to increase population sizes as population dynamics are affected by salinity and individual behaviour was shown to be affected more by the swarm structure than the population size. This confirms phenotypic and behavioural plasticity to cause a fitness increase in reaction to environmental heterogeneity. Amino acid expression differences and phosphate decrease suggest an increase energy production in a population stressed prior to exposure and contrast previous studies suggesting a decrease in stress situations. The lack of clear phenylalnine signals in the metabolome suggests alterations to hormones including dopamine. However, the findings do not agree with the previous suggestion that tail length is proportional to salinity stress and that survival in unchanged medium is proportional to salinity tolerance. While the importance of swarm structures to the display of behavioural plasticity in reaction to salinity exposure has been shown here, discrepancies between findings and literature demonstrate that D. magna metabolomics should be further investigated to investigate the mechanisms behind the phenotypic and behavioural plasticity of the species.
description: Additional information can be found at https://github.com/AlicedeSampaioKalkuhl/D.magna_Poster
Strong Structural Controllability and Observability of Linear Time-Varying Systems
Creators: name: Reissig, Gunther
name: Hartung, Christoph
name: Svaricek, Ferdinand
Publisher: name: arXiv
Year: 2013
Subjects: subject: Optimization and Control (math.OC)
subject: Systems and Control (eess.SY)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: 93B05, 93B07, 93C05, 15A03, 05C50

description: In this note we consider continuous-time systems x'(t) = A(t) x(t) + B(t) u(t), y(t) = C(t) x(t) + D(t) u(t), as well as discrete-time systems x(t+1) = A(t) x(t) + B(t) u(t), y(t) = C(t) x(t) + D(t) u(t) whose coefficient matrices A, B, C and D are not exactly known. More precisely, all that is known about the systems is their nonzero pattern, i.e., the locations of the nonzero entries in the coefficient matrices. We characterize the patterns that guarantee controllability and observability, respectively, for all choices of nonzero time functions at the matrix positions defined by the pattern, which extends a result by Mayeda and Yamada for time-invariant systems. As it turns out, the conditions on the patterns for time-invariant and for time-varying discrete-time systems coincide, provided that the underlying time interval is sufficiently long. In contrast, the conditions for time-varying continuous-time systems are more restrictive than in the time-invariant case.
description: This work has been accepted for publication in the IEEE Trans. Automatic Control. v2: Section IV (observability) added; plus minor modifications; accepted version
Spherical means on the Heisenberg group: Stability of a maximal function estimate
Creators: name: Anderson, Theresa C.
name: Cladek, Laura
name: Pramanik, Malabika
name: Seeger, Andreas
Publisher: name: arXiv
Year: 2018
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics
subject: 42B25, 22E25, 43A80, 35S30

description: Consider the surface measure $μ$ on a sphere in a nonvertical hyperplane on the Heisenberg group $\mathbb{H}^n$, $n\ge 2$, and the convolution $f*μ$. Form the associated maximal function $Mf=\sup_{t>0}|f*μ_t|$ generated by the automorphic dilations. We use decoupling inequalities due to Wolff and Bourgain-Demeter to prove $L^p$-boundedness of $M$ in an optimal range.
Gauge-Stringy Instantons in N=2 U(N) Gauge Theories
Creators: name: Ghorbani, Hossein
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Using D3/D(-1) brane set-up in type IIB string theory we introduce gauge-stringy instantons in N=2 U(N) supersymmetry theories with one matter multiplet in symmetric representation. In addition to the gauge and stringy moduli there exist extra zero modes that we refer to as "gauge-stringy" moduli. We show that the measure of the moduli space in this model becomes dimensionless for arbitary N when the gauge instanton charge k_g is equal to the stringy instanton charge k_s. This property of gauge-stringy instantons leads to having equal contributions from all instanton charges k_s=k_g=k in the effective action. We derive the gauge-stringy instanton partition function and calculate the corrections to the prepotential due to k=1,2 gauge-stringy instanton charges. As a by-product the partition function for gauge k-instanton is obtained which coincides with the result from the standard ADHM construction.
description: 4 references added, A paragraph added in Conclusions, To appear in JHEP
title: Chemical processing in the coma as the source of cometary HNC
Creators: name: Irvine, William M.
name: Bergin, DA
name: Dickens, JE
name: Jewitt, D
name: Lovell, AJ
name: Matthews, HE
name: Schloerb, FP
name: Senay, M
Publisher: name: University of Massachusetts Amherst
Year: 1998
Subjects: subject: Astrophysics and Astronomy

description: The published version is located at http://www.nature.com/nature/journal/v393/n6685/full/393547a0.html
description: The discovery of hydrogen isocyanide (HNC) in comet Hyakutake with an abundance (relative to hydrogen cyanide, HCN) similar to that seen in dense interstellar clouds raised the possibility that these molecules might be surviving interstellar material1. The preservation of material from the Sun's parent molecular cloud would provide important constraints on the processes that took place in the protostellar nebula. But another possibility is that HNC is produced by photochemical processes in the coma, which means that its abundance could not be used as a direct constraint on conditions in the early Solar System. Here we show that the HNC/HCN ratio determined for comet Hale–Bopp varied with heliocentric distance in a way that matches the predictions of models of gas-phase chemical production of HNC in the coma, but cannot be explained if the HNC molecules were coming from the comet's nucleus. We conclude that HNC forms mainly by chemical reactions in the coma, and that such reactions need to be considered when attempting to deduce the composition of the nucleus from observations of the coma.
Electronic properties of Cs-based halide perovskites: An ab-initio study
Creators: name: Moschou, G.
name: Koliogiorgos, A.
name: Galanakis, I.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Halide perovskites consist a class of materials under intense investigation due to their potential technological applications like solar cells, optoelectronic devices and catalysis. Recently we have studied using electronic band structure calculations from first principles, the cubic MABX$_3$ compounds [A. Koliogiorgos et al., Comput. Mater. Sci. \textbf{138}, 92 (2017)], where MA stands for the methylammonium cation, B is a divalent cation and X a halogen. We expand our study in the case where Cs stands in place of the MA cation. Our results suggest that the Cs-based compounds exhibit also a variety of lattice constants and energy band gaps. The calculated equilibrium lattice constants differ substantially from the experimental ones. The calculated energy gaps also show large deviations for these lattice constants. Moreover, the use of more sophisticated functionals leads to conflicting changes in the energy gap values and its effect is materials dependent. Our results suggest that contrary to the MA halide perovskites, the Cs halide perovskites consist a more delicate case and there is still a long way for \textit{ab-initio} calculations to accurate describe their structural and electronic properties.
description: Physica Status Solidi A: Applications and Materials Science accepted for a Special Issue on "Materials for Energy Harvesting"
Affine group formulation of the Standard Model coupled to gravity
Creators: name: Chou, Ching-Yi
name: Ita, Eyo
name: Soo, Chopin
Publisher: name: arXiv
Year: 2013
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: This work demonstrates that a complete description of the interaction of matter and all forces, gravitational and non-gravitational, can in fact be realized within a quantum affine algebraic framework. Using the affine group formalism, we construct elements of a physical Hilbert space for full, Lorentzian quantum gravity coupled to the Standard Model in four spacetime dimensions. Affine algebraic quantization of gravitation and matter on equal footing implies a fundamental uncertainty relation which is predicated upon a non-vanishing cosmological constant.
description: 9 pages
Studying software architecture through design spaces and rules
Creators: name: Lane, Thomas G.
Publisher: name: Carnegie Mellon University
Year: 2000
Subjects: subject: 89999 Information and Computing Sciences not elsewhere classified
subject: FOS: Computer and information sciences

description: Abstract: "This report argues that the overall structure of software systems ("software architecture") is usefully studied by constructing design spaces. A design space identifies the key functional and structural choices made in creating a system design, and it classifies the alternatives available for each choice. Rules can be formulated to relate choices within a design space. Sets of such rules are a valuable design aid and offer a promising route to automatic structural design. By codifying design practice, design spaces can also aid software maintenance and training.To support this argument, the report describes a design space and associated rules for user interface software, and it discusses an experiment that validated these design rules by comparing their predictions to real system designs."
Classical effects in the weak-field magnetoresistance of InGaAs/InAlAs quantum wells
Creators: name: Melnikov, M. Yu.
name: Shashkin, A. A.
name: Dolgopolov, V. T.
name: Biasiol, G.
name: Roddaro, S.
name: Sorba, L.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: We observe an unusual behavior of the low-temperature magnetoresistance of the high-mobility two-dimensional electron gas in InGaAs/InAlAs quantum wells in weak perpendicular magnetic fields. The observed magnetoresistance is qualitatively similar to that expected for the weak localization and anti-localization but its quantity exceeds significantly the scale of the quantum corrections. The calculations show that the obtained data can be explained by the classical effects in electron motion along the open orbits in a quasiperiodic potential relief manifested by the presence of ridges on the quantum well surface.
Ergodic complex structures on hyperkahler manifolds
Creators: name: Verbitsky, Misha
Publisher: name: arXiv
Year: 2013
Subjects: subject: Algebraic Geometry (math.AG)
subject: Complex Variables (math.CV)
subject: Differential Geometry (math.DG)
subject: FOS: Mathematics

description: Let $M$ be a compact complex manifold. The corresponding Teichmuller space $\Teich$ is a space of all complex structures on $M$ up to the action of the group of isotopies. The group $Γ$ of connected components of the diffeomorphism group (known as the mapping class group) acts on $\Teich$ in a natural way. An ergodic complex structure is the one with a $Γ$-orbit dense in $\Teich$. Let $M$ be a complex torus of complex dimension $\geq 2$ or a hyperkahler manifold with $b_2>3$. We prove that $M$ is ergodic, unless $M$ has maximal Picard rank (there is a countable number of such $M$). This is used to show that all hyperkahler manifolds are Kobayashi non-hyperbolic.
description: 25 pages, last version (many minor corrections; one gap fixed)
Fluctuation analysis and short time asymptotics for multiple scales diffusion processes
Creators: name: Spiliopoulos, Konstantinos
Publisher: name: arXiv
Year: 2013
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 60F05, 60F17, 60G17, 60J60

description: We consider the limiting behavior of fluctuations of small noise diffusions with multiple scales around their homogenized deterministic limit. We allow full dependence of the coefficients on the slow and fast motion. These processes arise naturally when one is interested in short time asymptotics of multiple scale diffusions. We do not make periodicity assumptions, but we impose conditions on the fast motion to guarantee ergodicity. Depending on the order of interaction between the fast scale and the size of the noise we get different behavior. In certain cases additional drift terms arise in the limiting process, which are explicitly characterized. These results provide a better approximation to the limiting behavior of such processes when compared to the law of large numbers homogenization limit.
Wavelet-Based Quantum Field Theory
Creators: name: Altaisky, Mikhail V.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The Euclidean quantum field theory for the fields $ϕ_{Δx}(x)$, which depend on both the position $x$ and the resolution $Δx$, constructed in SIGMA 2 (2006), 046, hep-th/0604170, on the base of the continuous wavelet transform, is considered. The Feynman diagrams in such a theory become finite under the assumption there should be no scales in internal lines smaller than the minimal of scales of external lines. This regularisation agrees with the existing calculations of radiative corrections to the electron magnetic moment. The transition from the newly constructed theory to a standard Euclidean field theory is achieved by integration over the scale arguments.
description: This is a contribution to the Proc. of the Seventh International Conference ''Symmetry in Nonlinear Mathematical Physics'' (June 24-30, 2007, Kyiv, Ukraine), published in SIGMA (Symmetry, Integrability and Geometry: Methods and Applications) at http://www.emis.de/journals/SIGMA/
title: ADCO, Cartulaire de Cîteaux pour les possessions d’Izeure (XVe siècle), Cart. 178 (11 H 80), 82 folios, f. 0083
Creators: name: de la Côte d'Or, Archives départementales
name: Archives Départementales De La Côte-D'Or
name: Petot, Frédérique
name: Projet CBMA
name: Petot, Frédéric
name: CG21/F.PETOT/2015
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2020
Subjects: subject: Corpus Burgundiae Medii Aevi
subject: Chartes de la Bourgogne du Moyen Âge
subject: LaMOP
subject: Laboratoire de Médiévistique Occidentale de Paris
subject: cartulaire

description: Cartulaire de Cîteaux pour les possessions d’Izeure (XVe siècle), Archives départementales de la Côte-d'Or, Cart. 178 (11 H 80), 82 folios, f. 0083, Numérisation en mode image.
description: Relation: http://www.cbma-project.eu/
description: Bibliographic citation: Cartulaire de Cîteaux pour les possessions d’Izeure (XVe siècle), Archives départementales de la Côte-d'Or, Cart. 178 (11 H 80), 82 folios, f. 0083, in Projet CBMA - Corpus Burgundiae Medii Aevi [Ressource en ligne], https:// manuscrits.cbma-project.eu/
description: Provenance: abbaye de Cîteaux
description: Provenance: http://www.wikidata.org/entity/Q843261
description: Provenance: https://www.geonames.org/3024876
description: Provenance: http://www.idref.fr/030974844/id
description: Provenance: https://catalogue.bnf.fr/ark:/12148/cb12228351v
Telecom wavelength single quantum dots with very small excitonic fine-structure splitting
Creators: name: Kors, Andrei
name: Reithmaier, Johann Peter
name: Benyoucef, Mohamed
Publisher: name: arXiv
Year: 2018
Subjects: subject: Applied Physics (physics.app-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We report on molecular beam epitaxy growth of symmetric InAs/InP quantum dots (QDs) emitting at telecom C-band (1.55 $μ$m) with ultra-small excitonic fine-structure splitting of ~2 $μ$eV. The QDs are grown on distributed Bragg reflector and systematically characterized by micro-photoluminescence ($μ$-PL) measurements. One order of magnitude of QD PL intensity enhancement is observed in comparison with as-grown samples. Combination of power-dependent and polarization-resolved measurements reveal background-free exciton, biexciton and dark exciton emission with resolution-limited linewidth below 35 $μ$eV and biexciton binding energy of ~1 meV. The results are confirmed by statistical measurements of about 20 QDs.
description: 15 pages, 4 figures
Evidence for temperature dependent spin-diffusion as a mechanism of intrinsic flux noise in SQUIDs
Creators: name: Lanting, T.
name: Amin, M. H.
name: Berkley, A. J.
name: Rich, C.
name: Chen, S. -F.
name: LaForest, S.
name: de Sousa, Rogerio
Publisher: name: arXiv
Year: 2013
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The intrinsic flux noise observed in superconducting quantum interference devices (SQUIDs) is thought to be due to the fluctuation of electron spin impurities, but the frequency and temperature dependence observed in experiments do not agree with the usual 1/f models. We present theoretical calculations and experimental measurements of flux noise in rf-SQUID flux qubits that show how these observations, and previous reported measurements, can be interpreted in terms of a spin-diffusion constant that increases with temperature. We fit measurements of flux noise in sixteen devices, taken in the 20-80 mK temperature range, to the spin-diffusion model. This allowed us to extract the spin-diffusion constant and its temperature dependence, suggesting that the spin system is close to a spin-glass phase transition.
description: Expanded version to appear in Phys. Rev. B
Kicked rotor quantum resonances in position space
Creators: name: Lepers, Maxence
name: Zehnlé, Véronique
name: Garreau, Jean Claude
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: Chaotic Dynamics (nlin.CD)
subject: Atomic Physics (physics.atom-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We present an approach of the kicked rotor quantum resonances in position-space, based on its analogy with the optical Talbot effect. This approach leads to a very simple picture of the physical mechanism underlying the dynamics and to analytical expressions for relevant physical quantities, such as mean momentum or kinetic energy. The ballistic behavior, which is closely associated to quantum resonances, is analyzed and shown to emerge from a coherent adding of successive kicks applied to the rotor thanks to a periodic reconstruction of the spatial wavepacket.
description: 5 figures, format RevTeX 4
Bibliometric Approximation of a Scientific Specialty by Combining Key Sources, Title Words, Authors and References
Creators: name: Rons, Nadine
Publisher: name: arXiv
Year: 2017
Subjects: subject: Digital Libraries (cs.DL)
subject: FOS: Computer and information sciences

description: Bibliometric methods for the analysis of highly specialized subjects are increasingly investigated and debated. Information and assessments well-focused at the specialty level can help make important decisions in research and innovation policy. This paper presents a novel method to approximate the specialty to which a given publication record belongs. The method partially combines sets of key values for four publication data fields: source, title, authors and references. The approach is founded in concepts defining research disciplines and scholarly communication, and in empirically observed regularities in publication data. The resulting specialty approximation consists of publications associated to the investigated publication record via key values for at least three of the four data fields. This paper describes the method and illustrates it with an application to publication records of individual scientists. The illustration also successfully tests the focus of the specialty approximation in terms of its ability to connect and help identify peers. Potential tracks for further investigation include analyses involving other kinds of specialized publication records, studies for a broader range of specialties, and exploration of the potential for diverse applications in research and research policy context.
description: 31 pages, 7 figures
Structuring Continuous Video Recordings of Everyday Life Using Time-Constrained Clustering
Creators: name: Wei-Hao  Lin
name: Hauptmann, Alexander
Publisher: name: Carnegie Mellon University
Year: 1979
Subjects: subject: 89999 Information and Computing Sciences not elsewhere classified
subject: FOS: Computer and information sciences

description: As personal wearable devices become more powerful and ubiquitous, soon everyone will be capable to continuously record video of everyday life. The archive of continuous recordings need to be segmented into manageable units so that they can be efficiently browsed and indexed by any video retrieval systems. Many researchers approach the problem in two-pass methods: segmenting the continuous recordings into chunks, followed by clustering chunks. In this paper we propose a novel one-pass algorithm to accomplish both tasks at the same time by imposing time constraints on the K-Means clustering algorithm. We evaluate the proposed algorithm on 62.5 hours of continuous recordings, and the experiment results show that time-constrained clustering algorithm substantially outperforms the unconstrained version.
Elliptic polylogarithms and iterated integrals on elliptic curves I: general formalism
Creators: name: Broedel, Johannes
name: Duhr, Claude
name: Dulat, Falko
name: Tancredi, Lorenzo
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We introduce a class of iterated integrals, defined through a set of linearly independent integration kernels on elliptic curves. As a direct generalisation of multiple polylogarithms, we construct our set of integration kernels ensuring that they have at most simple poles, implying that the iterated integrals have at most logarithmic singularities. We study the properties of our iterated integrals and their relationship to the multiple elliptic polylogarithms from the mathematics literature. On the one hand, we find that our iterated integrals span essentially the same space of functions as the multiple elliptic polylogarithms. On the other, our formulation allows for a more direct use to solve a large variety of problems in high-energy physics. We demonstrate the use of our functions in the evaluation of the Laurent expansion of some hypergeometric functions for values of the indices close to half integers.
description: 55 pages
Infinitesimal Hecke algebras of so_N
Creators: name: Tsymbaliuk, Alexander
Publisher: name: arXiv
Year: 2013
Subjects: subject: Representation Theory (math.RT)
subject: FOS: Mathematics

description: In this article we classify all infinitesimal Hecke algebras of so_N. We establish isomorphism of their universal versions and the W-algebras of so_{N+2m+1} with a 1-block nilpotent element of the Jordan type (1,...,1,2m+1). This should be considered as a continuation of the recent joint paper with I. Losev, where the analogous results were obtained for the cases of gl_n and sp_{2n}.
description: 14 pages; v2: minor corrections, some details added
Structure Learning for Generative Models of Protein Fold Families
Creators: name: Sivaraman  Balakrishnan
name: Hetunandan  Kamisetty
name: Carbonell, Jaime G.
name: Langmead, Christopher J.
Publisher: name: Carnegie Mellon University
Year: 2001
Subjects: subject: 89999 Information and Computing Sciences not elsewhere classified
subject: FOS: Computer and information sciences

description: Statistical models of the amino acid composition of the proteins within a fold family are widely used in science and engineering. Existing techniques for learning probabilistic graphical models from multiple sequence alignments either make strong assumptions about the conditional independencies within the model (e.g., HMMs), or else use sub-optimal algorithms to learn the structure and parameters of the model. We introduce an approach to learning the topological structure and parameters of an undirected probabilistic graphical model. The learning algorithm uses block- L1 regularization and solves a convex optimization problem, thus guaranteeing a globally optimal solution at convergence. The resulting model encodes both the position-specific conservation statistics and the correlated mutation statistics between sequential and long-range pairs of residues. Our model is generative, allowing for the design of new proteins that have corresponding statistical properties to those seen in nature. We apply our approach to two widely studied protein families: the WW and the PDZ folds. We demonstrate that our model is able to capture interactions that are important in folding and allostery. Our results additionally indicate that while the network of interactions within a protein is sparse, it is richer than previously believed.
title: Quantum vacuum nonlinearities in strong electromagnetic fields
Creators: name: Karbstein, Felix
Publisher: name: Friedrich-Schiller-Universität Jena
Year: 2024
Subjects: subject: Quantenelektrodynamik
subject: Feld
subject: Starkes Feld
subject: Euler-Heisenberg-Lagrangian
subject: 530

description: The physical vacuum of a relativistic quantum field theory amounts to a non-trivial quantum state. It encodes information about the full particle content of the underlying microscopic theory in the form of virtual processes, also referred to as vacuum fluctuations. If the theory features charged particles, fluctuations of the latter give rise to nonlinear effective couplings between electromagnetic fields that vanish in the formal limit of a vanishing Planck constant, but persist for a nonzero physical value. In turn, they inherently modify Maxwell’s linear theory of classical electrodynamics. However, for the field strengths reached by macroscopic electromagnetic fields currently available in the laboratory the quantum vacuum nonlinearities induced by Standard Model particles are parametrically suppressed relatively to the linear contribution by inverse powers of the electron mass and thus very small. As a consequence, this fundamental tenet has remained experimentally challenging and is yet to be tested in the laboratory. The present work is devoted to the study of quantum vacuum nonlinearities in strong electromagnetic fields arising from quantum electrodynamics. It provides a detailed account of the state of the art of analytical theory. On the one hand, it focuses on fundamental theoretical aspects concerning the structure and behavior of the Heisenberg-Euler effective action, which supersedes the classical Maxwell action in governing the physics of strong macroscopic electromagnetic fields in the quantum vacuum. On the other hand, it is concerned with questions of direct phenomenological relevance like the systematic study of photonic quantum vacuum signals accessible with state-of-the-art laser technology.
A Global Comparison of Effective Government Policies to Prevent and End Homelessness: A Scoping Review
Creators: name: Ariba, Olayinka
name: Oudshoorn, Abe
name: Isard, Roxanne
name: Kusdemir, Sibel
name: Easton, Corinna
name: Avor, Wisdom
name: , Adabbag@Uwo.Ca
Publisher: name: Open Science Framework
Year: 2022
Subjects: subject: Medicine and Health Sciences
subject: Social and Behavioral Sciences
subject: Government policies
subject: High-income countries.
subject: homelessness
subject: Preventing and ending homelessness

description: This is the registration for the protocol of a scoping review titled 'A Global Comparison of Effective Government Policies to Prevent and End Homelessness: A Scoping Review’. The overall objective of our scoping review is to provide a comprehensive overview and map existing literature on what is known and unknown on effective national policy frameworks that prevent and end homelessness in high income countries.. Our scoping review will adhere to the five stage process described by Arksey & O' Malley (2005) and PRISMA ScR guidelines for conducting a scoping review. Five databases have been used to deploy our search strategy, as EMBASE (OVID), MEDLINE (OVID), CINAHL (Ebsco), PsycINFO (OVID) and Sociological Abstracts (ProQuest). The findings of this review are intended to guide future research, practice and policy approaches to preventing and ending homelessness in high-income countries.
Gibbsian theory of power law distributions
Creators: name: Treumann, R. A.
name: Jaroschek, C. H.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: It is shown that power law phase space distributions describe marginally stable Gibbsian equilibria far from thermal equilibrium which are expected to occur in collisionless plasmas containing fully developed quasi-stationary turbulence. Gibbsian theory is extended on the fundamental level to statistically dependent subsystems introducing an `ordering parameter' $κ$. Particular forms for the entropy and partition functions are derived with super-additive (non-extensive) entropy, and a redefinition of temperature in such systems is given.
description: Physical Review Letters revised second revision (and shortened because of overlength) co-author added
Structure based chemical shift prediction using Random Forests non-linear regression
Creators: name: K  Arun
name: Langmead, Christopher James.
Publisher: name: Carnegie Mellon University
Year: 1999
Subjects: subject: 89999 Information and Computing Sciences not elsewhere classified
subject: FOS: Computer and information sciences

description: Abstract: "Protein nuclear magnetic resonance (NMR) chemical shifts are among the most accurately measurable spectroscopic parameters and are closely correlated to protein structure because of their dependence on the local electronic environment. The precise nature of this correlation remains largely unknown. Accurate prediction of chemical shifts from existing structures' atomic co-ordinates will permit close study of this relationship. This paper presents a novel non-linear regression based approach to chemical shift prediction from protein structure. The regression model employed combines quantum, classical and empirical variables and provides statistically significant improved prediction accuracy over existing chemical shift predictors, across protein backbone atom types. The results presented here were obtained using the Random Forest regression algorithm on a protein entry data set derived from the RefDB re-referenced chemical shift database."
Testing the general relativistic ''no-hair'' theorems using the galactic center black hole SgrA*
Creators: name: Will, Clifford M.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: If a class of stars orbits the central black hole in our galaxy in short period (~ 0.1 year), high eccentricity (~ 0.9) orbits, they will experience precessions of their orbital planes induced by both relativistic frame-dragging and the quadrupolar gravity of the hole, at levels that could be as large as 10 microarcseconds per year, if the black hole is rotating faster than 1/2 of its maximum rotation rate. Astrometric observations of the orbits of at least two such stars can in principle lead to a determination of the angular momentum vector J of the black hole and its quadrupole moment Q_2. This could lead to a test of the general relativistic no-hair theorems, which demand that Q_2 = - J^2/M. Future high-precision adaptive infrared optics instruments make make such a fundamental test of the black-hole paradigm possible.
description: 5 pages, 2 figures; minor changes, added references; accepted for publication in The Astrophysical Journal Letters
An innovative technique for the investigation of the 4-fold forbidden beta-decay of $^{50}$V
Creators: name: Pattavina, L.
name: Laubenstein, M.
name: Nagorny, S. S.
name: Nisi, S.
name: Pagnanini, L.
name: Pirro, S.
name: Rusconi, C.
name: Schaeffner, K.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: For the first time a Vanadium-based crystal was operated as cryogenic particle detector. The scintillating low temperature calorimetric technique was used for the characterization of a 22 g YVO$_4$ crystal aiming at the investigation of the 4-fold forbidden non-unique $β^-$ decay of $^{50}$V. The excellent bolometric performance of the compound together with high light output of the crystal makes it an outstanding technique for the study of such elusive rate process. The internal radioactive contaminations of the crystal are also investigated showing that an improvement on the current status of material selection and purification are needed, $^{235/238}$U and $^{232}$Th are measured at the level of 28 mBq/kg, 1.3 Bq/kg and 28 mBq/kg, respectively. In this work, we also discuss a future upgrade of the experimental set-up which may pave the road for the detection of the rare $^{50}$V $β^-$ decay.
Modelos de ocupación para los castros costeros del Golfo Ártabro. Una propuesta metodológica
Creators: name: Nión-Álvarez, Samuel
Publisher: name: Zenodo
Year: 2016
Subjects: castros costeros, cultura castreña, Golfo Ártabro, SIG, modelo locacional

description: En este trabajo se presenta la metodología aplicada a un estudio local de los castros costeros del Golfo Ártabro, una región situada en el Noroeste de la Península Ibérica. Esta propuesta pretende obtener modelos locacionales que nos permitan comprender las estrategias de ocupación de las sociedades castreñas de la zona, así como ver como se relacionan, desde el punto de vista de la ocupación el territorio, con el mar y su entorno. Además, también se plantea una reflexión acerca del concepto “castro costero” y sus posibles interpretaciones y definiciones, pues se considera necesario para una correcta apli-cación de nuestra metodología delimitar este concepto de forma concisa. Para la obtención de dichos modelos, partimos de tres variables principales de análisis: altitud relativa respecto al mar, visibilidad y accesibilidad a la costa. La herramienta básica para la realización del análisis serán los SIG (Sistemas de Información Geográfica), debido a su practicidad y funcionalidad para acercarse a un registro escaso y fragmentario. En definitiva, la principal función de este trabajo es proponer una metodología que pueda aportar cierta información en lo relativo a los patrones de asentamiento básicos de los castros costeros en la región de estudio, procurando ampliar la (escasa) información arqueológica disponible, e intentando servir como base a futuras investigaciones que intenten recomponer la organización social y territorial de esta zona.
Mimic the optical conductivity in disordered solids via gauge/gravity duality
Creators: name: Sun, Jia-Rui
name: Wu, Shang-Yu
name: Zhang, Hai-Qing
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study the optical conductivity in a (2+1)-dimensional non-relativistic field theory holographically dual to a (3+1)-dimensional charged Lifshitz black brane with the Einstein-Maxwell-dilaton theory. Surprisingly, we find that the optical AC conductivity satisfies the nontrivial (non-)power law scaling in the high frequency regime rather than approaching to a constant when the dynamical critical exponent $z>1$, which is qualitatively similar to those in various disordered solids in condensed matter systems. Besides, this (non-)power law scaling behavior shows some universality, which is robust against the temperatures. We argue that the peculiar scaling behavior of AC conductivity may stem from the couplings of the dilaton field with the gauge fields and also the logarithmic behavior near the boundary in the Lifshitz spacetime.
description: 17 pages, 3 figures, 1 table, published version