cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
title: A Counterfactual Valuation of the Stock Index as a Predictor of Crashes
Creators: name: Roberts, Tom
Publisher: name: Bank of Canada
Year: 2017

description: Stock market fundamentals would not seem to meaningfully predict returns over a shorter-term horizon—instead, I shift focus to severe downside risk (i.e., crashes). I use the cointegrating relationship between the log S&P Composite Index and log earnings over 1871 to 2015, combined with smoothed earnings, to first construct a counterfactual valuation benchmark. The price-versus-benchmark residual shows an improved, and economically meaningful, logit estimation of the likelihood of a crash over alternatives such as the dividend yield and price momentum. Rolling out-of-sample estimates highlight the challenges in this task. Nevertheless, the overall results support the common popular belief that a higher stock market valuation in relation to fundamentals entails a higher risk of a crash.
description: Comme les facteurs fondamentaux du marché boursier ne semblent pas permettre d’effectuer des prédictions significatives des rendements à court terme, nous nous intéressons plutôt, dans cette étude, aux importants risques à la baisse (risques de krach). Nous analysons donc la relation de cointégration entre l’indice composite S&P (en logarithme) et les revenus (en logarithme) concernant la période 1871-2015, que nous combinons aux revenus lissés afin d’établir, pour commencer, un niveau de prix de référence contrefactuel. Le résidu, c’est-à-dire l’écart entre les prix rééls et les prix de référence, procure une meilleure estimation (significative sur le plan économique) de la probabilité d’un krach dans un modèle logit, comparativement à d’autres indicateurs comme les dividendes et la dynamique des prix. Les estimations hors échantillon sur fenêtre glissante mettent en lumière la difficulté d’une telle tâche. Néanmoins, les résultats globaux obtenus corroborent l’idée répandue selon laquelle des cours boursiers élevés au regard des facteurs fondamentaux laissent supposer un risque accru de krach.
Data and R Code for "Exploring climate-related gut microbiome variation in bumble bees: An experimental and observational perspective"
Creators: name: Maihoff, Fabienne
name: Keller, Alexander
name: Classen, Alice
Publisher: name: figshare
Year: 2025
Subjects: classificationCode: 310399
subject: Ecology not elsewhere classified

description: Rising temperatures negatively affect bumble bee fitness directly through physiological impacts and indirectly by disrupting mutualistic interactions between bees and other organisms, which are crucial in determining species-specific responses to climate change. Gut microbial symbionts, key regulators of host nutrition and health, may be the Achilles’ heel of thermal responses in insects. They not only modulate biotic interactions with plants and pathogens but, also exhibit varying thermal sensitivity themselves. Understanding how environmental changes disrupt microbiome communities is a crucial first step to determine potential consequences for host population responses. We analyzed gut bacterial communities of six bumble bee species inhabiting different climatic niches along an elevational gradient in the German Alps using 16S ribosomal DNA amplicon sequencing. We first investigated whether inter- and intraspecific differences in gut bacterial communities can be linked to species' elevational niches, which differ in temperature, flower resource composition and likely pathogen pressure. A reciprocal translocation experiment between distinct climatic regions tested how the gut bacterial communities of Bombus terrestris and Bombus lucorum change short-term when exposed to new environments. Finally, we exposed these species to heat and cold wave scenarios within climate chambers to disentangle pure temperature-driven effects on the microbiome from other environmental effects. Interspecific variation in microbiome composition exceeded intraspecific variation. Species exhibit varying levels of gut microbiome stability, where stability is defined as the within-group variance: lower stability, indicated by greater within-group variance, is predominantly observed in species inhabiting higher elevations. Transplanted species showed subtle short-term gut microbiome adjustments, marked by an increase in Lactobacillaceae upon exposure to warmer regions; however, the gut microbiomes of these bumble bees did not change under laboratory temperature scenarios. We conclude that marked differences in the gut microbiomes of bumble bees could lead to species-specific responses to environmental change. For example, less stable microbiomes in bumble bees inhabiting higher elevations might indicate an increased sensitivity to pathogens. Short-term microbiome changes following translocation indicate that species with relatively stable microbiomes, such as B. lucorum and B. terrestris, can rapidly integrate new bacteria, which could increase their capacity to cope with new environments under climate change.
title: Aggregate Fluctuations and the Role of Trade Credit
Creators: name: Shao, Lin
Publisher: name: Bank of Canada
Year: 2017

description: In an economy where production takes place in multiple stages and is subject to financial frictions, how firms finance intermediate inputs matters for aggregate outcomes. This paper focuses on trade credit—the lending and borrowing of input goods between firms—and quantifies its aggregate impacts during the Great Recession. Motivated by empirical evidence, our model shows how trade credit alleviates financial frictions through a process of credit redistribution and creation, thus leading to a higher output level in the steady state. However, in the face of financial market distress, suppliers cut back trade credit lending, further tightening their customers’ borrowing constraint. The decline in economic activities following financial shocks is in turn amplified by disruptions in trade credit. Our model simulation suggests that the drop in trade credit during the Great Recession can account for almost one-fourth of the observed decline in output.
description: Dans une économie où la production se déroule en plusieurs étapes et fait l’objet de frictions financières, les modes de financement des biens intermédiaires influent sur les agrégats macroéconomiques. Notre étude porte sur les crédits commerciaux (les prêts et les emprunts de biens de production entre entreprises) et quantifie leur impact sur les agrégats macroéconomiques durant la Grande Récession. Fondé sur des résultats empiriques, notre modèle montre comment les crédits commerciaux permettent d’atténuer les frictions financières, par la redistribution et la création de crédit, et entraînent donc une hausse de la production en état stationnaire. Toutefois, en période de difficultés sur les marchés financiers, les fournisseurs réduisent l’octroi de crédits commerciaux, ce qui provoque un resserrement des conditions d’emprunt. La baisse de l’activité économique à la suite de chocs financiers se trouve alors amplifiée par les perturbations dans l’offre de crédits commerciaux. La simulation réalisée à l’aide de notre modèle indique que la chute des crédits commerciaux pendant la Grande Récession est à l’origine de près du quart du recul de production observé.
Optimal third root asymptotic bounds in the statistical estimation of thresholds
Creators: name: Merkl, Franz
name: Mohammadi, Leila
Publisher: name: arXiv
Year: 2007
Subjects: subject: Statistics Theory (math.ST)
subject: FOS: Mathematics
subject: 62G05 (Primary); 62G20 (Secondary)

description: This paper is concerned with estimating the intersection point of two densities, given a sample of both of the densities. This problem arises in classification theory. The main results provide lower bounds for the probability of the estimation errors to be large on a scale determined by the inverse cube root of the sample size. As corollaries, we obtain probabilistic bounds for the prediction error in a classification problem. The key to the proof is an entropy estimate. The lower bounds are based on bounds for general estimators, which are applicable in other contexts as well. Furthermore, we introduce a class of optimal estimators whose errors asymptotically meet the border permitted by the lower bounds.
description: Published in at http://dx.doi.org/10.1214/009053607000000325 the Annals of Statistics (http://www.imstat.org/aos/) by the Institute of Mathematical Statistics (http://www.imstat.org)
title: Lettres et mails à Marc Olivier Girard - Pièce jointe
Creators: name: Leibowitch, Jacques
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2020

description: Source: http://www.calames.abes.fr/pub/ms/Calames-20193111135799625
description: created: start=1992-06-02;end=2010-03-17
Deterministic Quantum Network for Distributed Entanglement and Quantum Computation
Creators: name: Cohen, I.
name: Mølmer, K.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We propose a simple interaction protocol to be implemented on a scalable quantum network, in which the quantum nodes consist of qubit systems confined in cavities. The nodes are deterministically coupled by transmission and reflection of a single photon, which is disentangled from the qubits at the end of the coupling operation. This single photon can generate an entangling controlled phase (C-PHASE) gate between any selected number of qubits in the network. Our multi-qubit gate reaches a much higher fidelity compared to schemes concatenating one-qubit and two-qubit gates; thus it forms an efficient basis for universal quantum computing distributed over multiple processor units. In our analysis we consider atomic qubits coupled to optical photons, while the scheme can be readily generalized to other architectures, such as superconducting qubit nodes coupled by microwave photons.
title: ADCO, Cartulaire général de Cîteaux, dit de Jean de Cirey, (XVe siècle), tome VI, Cart. 190 (11 H 75), 316 folios, f. 0315r
Creators: name: de la Côte d'Or, Archives départementales
name: Archives Départementales De La Côte-D'Or
name: Petot, Frédérique
name: Projet CBMA
name: CG21/F.PETOT/2012
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 général de Cîteaux, dit de Jean de Cirey, (XVe siècle), tome VI, Archives départementales de la Côte-d'Or, Cart. 190 (11 H 75), 316 folios, f. 0315r, Numérisation en mode image.
description: Relation: http://www.cbma-project.eu/
description: Bibliographic citation: Cartulaire général de Cîteaux, dit de Jean de Cirey, (XVe siècle), tome VI, Archives départementales de la Côte-d'Or, Cart. 190 (11 H 75), 316 folios, f. 0315r, 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
title: The Rise of Non-Regulated Financial Intermediaries in the Housing Sector and its Macroeconomic Implications
Creators: name: Desgagnes, Hélène
Publisher: name: Bank of Canada
Year: 2017

description: I examine the impact of non-regulated lenders in the mortgage market using a dynamic stochastic general equilibrium (DSGE) model. My model features two types of financial intermediaries that differ in three ways: (i) only regulated intermediaries face a capital requirement, (ii) non-regulated intermediaries finance themselves by selling securities and cannot accept deposits, and (iii) non-regulated intermediaries face a more elastic demand. This last assumption is based on empirical evidence for Canada revealing that non-regulated intermediaries issue loans at a lower interest rate. My results suggest that the non-regulated sector contributes to stabilize the economy by providing an alternative source of capital when the regulated sector in unable to fulfill the demand for credit. As a result, an economy with a large non-regulated sector experiences a smaller downturn after an adverse financial shock.
description: À l’aide d’un modèle d’équilibre général dynamique et stochastique, j’analyse l’incidence des prêteurs non réglementés sur le marché hypothécaire. Dans mon modèle, on retrouve deux types d’intermédiaires financiers qui se distinguent sous trois aspects. Tout d’abord, seuls les intermédiaires réglementés sont soumis à des exigences de fonds propres. Ensuite, les intermédiaires non réglementés émettent des titres pour financer leurs activités puisqu’ils ne peuvent pas recevoir de dépôts. Enfin, les intermédiaires non réglementés font face à une fonction de demande plus élastique que les intermédiaires réglementés. Cette dernière hypothèse s’appuie sur des données empiriques canadiennes qui suggèrent que les intermédiaires financiers non réglementés émettent des prêts à des taux d’intérêt plus bas. Mes résultats montrent que le secteur non réglementé contribue à stabiliser l’économie puisqu’il constitue une source de capitaux de rechange lorsque le secteur réglementé est incapable de répondre à la demande de crédit. Par conséquent, le ralentissement économique qui suit un choc financier négatif sera moins important dans une économie dans laquelle le secteur non réglementé occupe une place considérable.
title: Cross-Border Bank Flows and Monetary Policy: Implications for Canada
Creators: name: Correa, Ricardo
name: Paligorova, Teodora
name: Sapriza, Horacio
name: Zlate, Andrei
Publisher: name: Bank of Canada
Year: 2017

description: Using the Bank for International Settlements (BIS) Locational Banking Statistics data on bilateral bank claims from 1995 to 2014, we analyze the impact of monetary policy on cross-border bank flows. We find that monetary policy in a source country is an important determinant of cross-border bank flows. In addition, we find evidence in favor of a cross-border portfolio channel that works in parallel with the traditional bank lending channel. As tighter monetary conditions in source countries erode the net worth and collateral values of domestic borrowers, banks reallocate credit away from relatively risky domestic borrowers toward safer foreign counterparties. The cross-border reallocation of credit is more pronounced for source countries with weaker financial sectors that are likely more risk averse. Also, the reallocation is directed toward borrowers in advanced economies, or those in economies with investment-grade sovereign rating. In particular, source countries with tighter monetary policy increase cross-border credit to Canada. Our study highlights the spillovers of domestic monetary policy on foreign credit, which enhances the understanding of the international monetary transmission mechanism through global banks.
description: À partir des données sur les créances bancaires bilatérales tirées des statistiques bancaires territoriales de la Banque des Règlements Internationaux pour la période allant de 1995 à 2014, nous analysons l’incidence de la politique monétaire sur les flux bancaires transfrontières. Nous constatons que la politique monétaire d’un pays source est un déterminant important des flux bancaires transfrontières. De plus, nous notons des signes qui montrent que le canal transfrontière du rééquilibrage des portefeuilles fonctionne en parallèle avec le canal traditionnel des prêts bancaires. À mesure que le resserrement des conditions monétaires des pays sources fait diminuer la valeur nette des emprunteurs nationaux et la valeur de leurs garanties, les banques réaffectent leurs prêts au détriment des emprunteurs nationaux relativement risqués pour privilégier les contreparties étrangères plus sûres. Cette réaffectation transfrontière du crédit est plus prononcée pour les pays sources dotés d’un secteur financier faible et probablement plus réfractaire au risque. La réaffectation est en outre dirigée vers les emprunteurs des économies avancées ou ceux des économies émettrices de titres souverains de qualité. Plus particulièrement, le resserrement de la politique monétaire dans les pays sources accroît le crédit transfrontière destiné au Canada. Notre étude fait ressortir les répercussions de la politique monétaire nationale sur le crédit étranger, ce qui améliore la compréhension du mécanisme international de transmission de la politique monétaire par l’intermédiaire des banques mondiales.
Lorentz-Covariant Green-Schwarz Superstring Amplitudes
Creators: name: Berkovits, Nathan
Publisher: name: arXiv
Year: 1992
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In a recent paper, the BRST formalism for the gauge-fixed N=2 twistor-string was used to calculate Green-Schwarz supersring scattering amplitudes with an arbitrary number of loops and external massless states. Although the gauge-fixing procedure preserved the worldsheet N=2 superconformal invariance of the twistor-string, it broke the target-space SO(9,1) super-Poincaré invariance down to an SU(4)xU(1) subgroup. In this paper, generators for the SO(9,1) super-Poincaré transformations, as well as manifestly covariant vertex operators, are explicitly constructed out of the gauge-fixed matter fields. The earlier calculated amplitudes are then expressed in manifestly Lorentz-covariant notation.
description: 11 pages plain Tex, KCL-TH-92-6
Relativistic vortex electrons: paraxial versus non-paraxial regimes
Creators: name: Karlovets, Dmitry
Publisher: name: arXiv
Year: 2018
Subjects: subject: Quantum Physics (quant-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: A plane-wave approximation in particle physics implies that a width of a massive wave packet $σ_{\perp}$ is much larger than its Compton wavelength $λ_c = \hbar/mc$. For Gaussian beams or for packets with the non-singular phases (say, the Airy beams), corrections to this approximation are attenuated as $λ_c^2/σ_{\perp}^2 \ll 1$ and usually negligible. Here we show that this situation drastically changes for particles with the phase vortices associated with an orbital angular momentum $\ell\hbar$. For highly twisted beams with $|\ell| \gg 1$, the non-paraxial corrections get $|\ell|$ times enhanced and $|\ell|$ can already be as large as $10^3$. We describe the relativistic wave packets, both for vortex bosons and fermions, which transform correctly under the Lorentz boosts, are localized in a 3D space, and represent a non-paraxial generalization of the massive Laguerre-Gaussian beams. We compare such states with their paraxial counterpart paying specific attention to the relativistic effects and to the differences from the twisted photons. In particular, a Gouy phase is found to be Lorentz invariant and it generally depends on time rather than on a distance $z$. By calculating the electron packet's mean invariant mass, magnetic moment, etc., we demonstrate that the non-paraxial corrections can already reach the relative values of $10^{-3}$. These states and the non-paraxial effects can be relevant for the proper description of the spin-orbit phenomena in relativistic vortex beams, of scattering of the focused packets by atomic targets, of collision processes in particle and nuclear physics, and so forth.
description: Minor changes compared to v2
First measurement of the cross section for $ν_μ$ and $\barν_μ$ induced single charged pion production on argon using ArgoNeuT
Creators: name: ArgoNeuT Collaboration
name: Acciarri, R.
name: Adams, C.
name: Asaadi, J.
name: Baller, B.
name: Bolton, T.
name: Bromberg, C.
name: Cavanna, F.
name: Church, E.
name: Edmunds, D.
name: Ereditato, A.
name: Farooq, S.
name: Fitzpatrick, R. S.
name: Fleming, B.
name: Hackenburg, A.
name: Horton-Smith, G.
name: James, C.
name: Lang, K.
name: Lepetic, I.
name: Littlejohn, B. R.
name: Luo, X.
name: Mehdiyev, R.
name: Page, B.
name: Palamara, O.
name: Rebel, B.
name: Schukraft, A.
name: Scanavini, G.
name: Soderberg, M.
name: Spitz, J.
name: Szelc, A. M.
name: Weber, M.
name: Wu, W.
name: Yang, T.
name: Zeller, G. P.
Publisher: name: arXiv
Year: 2018
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We report on the first cross section measurement of charged-current single charged pion production by neutrinos and antineutrinos on argon. This analysis was performed using the ArgoNeuT detector exposed to the NuMI beam at Fermilab. The measurements are presented as functions of muon momentum, muon angle, pion angle, and angle between muon and pion. The flux-averaged cross sections are measured to be $2.7\pm0.5(stat)\pm0.5(syst) \times 10^{-37} \textrm{cm}^{2}/\textrm{Ar}$ for neutrinos at a mean energy of 9.6 GeV and $8.4\pm0.9(stat)^{+1.0}_{-0.8}(syst) \times 10^{-38} \textrm{cm}^{2}/\textrm{Ar}$ for antineutrinos at a mean energy of 3.6 GeV with the charged pion momentum above 100 MeV/$c$. The results are compared with several model predictions.
A mean-field model for the electron glass dynamics
Creators: name: Amir, Ariel
name: Oreg, Yuval
name: Imry, Yoseph
Publisher: name: arXiv
Year: 2007
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: We study a microscopic mean-field model for the dynamics of the electron glass, near a local equilibrium state. Phonon-induced tunneling processes are responsible for generating transitions between localized electronic sites, which eventually lead to the thermalization of the system. We find that the decay of an excited state to a locally stable state is far from being exponential in time, and does not have a characteristic time scale. Working in a mean-field approximation, we write rate equations for the average occupation numbers, and describe the return to the locally stable state using the eigenvalues of a rate matrix, A, describing the linearized time-evolution of the occupation numbers. Analyzing the probability distribution of the eigenvalues of A we find that, under certain physically reasonable assumptions, it takes the form $P(λ) \sim \frac{1}{|λ|}$, leading naturally to a logarithmic decay in time. While our derivation of the matrix A is specific for the chosen model, we expect that other glassy systems, with different microscopic characteristics, will be described by random rate matrices belonging to the same universality class of A. Namely, the rate matrix has elements with a very broad distribution, i.e., exponentials of a variable with nearly uniform distribution.
Nuclear Force in the Skyrme Model: Quasistatic Approach
Creators: name: Oka, Makoto
Publisher: name: arXiv
Year: 1993
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Dynamics of two-Skyrmion systems is studied in the quasistatic approach. The quasistatic approach enables us to formulate the collective coordinate quantization of two-Skyrmion systems consistently with the 1/Nc expansion. By constructing quasistatic field configurations for largely separated two Skyrmions, their energies are computed for three independent relative orientations of the Skyrmions in the isospin space. The obtained energies are much lower than those for the product approximation. In particular, the repulsion in the two-pion range is considerably reduced.
description: 15
Bioethical Deliberation on Genomic Testing: Islamic Perspectives
Creators: name: Al Shakaki, Alya
Publisher: name: Manara - Qatar Research Repository
Year: 2025
Subjects: classificationCode: 50
subject: Philosophy and religious studies

description: The "ethical aspects of genomic testing" is a global, contemporary, rising, and challenging topic, and it is certainly worthy of careful analysis and research. Furthermore, it is relevant to the State of Qatar as it launched the Qatar Genome Programme (QGP) in 2013. By performing genomic testing, we can know a huge amount of information about the body of the tested person. We can also predict some diseases with high certainty. Furthermore, testing one person may reveal highly relevant information about other family members as well. These characteristics of genomic testing raise complex ethical questions and dilemmas regarding performing the test in the first place, and in disclosing and managing the obtained results of the test. The main objective of this thesis is to give a comprehensive overview of the ethical aspects of this contemporary issue in order to have a good understanding of its complex dimensions. To achieve this goal, relevant data are analyzed that are related to three main areas, namely the scientific and medical aspects of genomic testing, including possible benefits and harms; the key ethical challenges and dilemmas related to genomic testing as described in Western bioethics literature; and finally, the Islamic ethical perspectives. Within this work, two real case-studies have been discussed. The first one is related to a Qatari patient recruited in Hamad General Hospital (HGH), and the ethical dilemma discussed concerns incidental findings. The second case-study is related to the ethics of management of a late-onset disease, Huntington disease. While Islamic tradition is rich in general in its sources and methodologies, the Islamic discourse on the contemporary issue of genomics testing still needs more effort to develop a comprehensive discourse. This thesis can help in achieving this goal.
Moduli and Twisted Sector Dependence of Z_N x Z_M Orbifold Couplings
Creators: name: Stieberger, S.
Publisher: name: arXiv
Year: 1992
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We derive the four point correlation function involving four twist fields for arbitrary even dimensional Z_N x Z_M orbifold compactifications. Using techniques from the conformal field theory the three point correlation functions with twist fields are determined. Both the choice of the modular background (compatible with the twists) and of the (higher) twisted sectors involved are fully general. Our results turn out to be target space duality invariant.
description: 10 pages (Latex)
title: Optimal Estimation of Multi-Country Gaussian Dynamic Term Structure Models Using Linear Regressions
Creators: name: Diez de los Rios, Antonio
Publisher: name: Bank of Canada
Year: 2017

description: This paper proposes a novel asymptotic least-squares estimator of multi-country Gaussian dynamic term structure models that is easy to compute and asymptotically efficient, even when the number of countries is relatively large—a situation in which other recently proposed approaches lose their tractability. We illustrate our estimator within the context of a seven-country, 10-factor term structure model.
description: Nous proposons un nouvel estimateur des modèles dynamiques gaussiens de la structure par terme des taux d’intérêt à plusieurs pays. Cet estimateur fondé sur la méthode des moindres carrés ordinaires est facile à calculer et asymptotiquement efficient, même avec un assez grand nombre de pays, un cas pour lequel d’autres méthodes proposées récemment perdent leur simplicité. Nous illustrons l’emploi de l’estimateur dans un modèle de structure par terme à sept pays et dix facteurs.
Perturbing QCD with external fields
Creators: name: Cea, Paolo
name: Cosmai, Leonardo
name: D'Elia, Massimo
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We present some up-to-date results on QCD phase transition in a chromomagnetic constant background field and in an abelian monopole background field. Our results indicate that the QCD critical temperature is not modified by a monopole background field, whilst it is modified by a constant chromomagnetic field. We improve our earlier estimate of the QCD critical parameters in a chromomagnetic background field by performing lattice simulations with weaker fields.
description: contribution to the XXV International Symposium on Lattice Field Theory, July 30 - August 4 2007, Regensburg, Germany, 7 pages
Nonlinear optical response of doped mono- and bilayer graphene: length gauge tight-binding model
Creators: name: Hipolito, F.
name: Taghizadeh, Alireza
name: Pedersen, T. G.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We compute the nonlinear optical response of doped mono- and bilayer graphene using the full dispersion based on tight-binding models. The response is derived with the density matrix formalism using the length gauge and is valid for any periodic system, with arbitrary doping. By collecting terms that define effective nonlinear response tensors, we identify all nonlinear Drude-like terms (up to third-order) and show that all additional spurious divergences present in the induced current vanish. The nonlinear response of graphene comprises a large Drude-like divergence and three resonances that are tightly connected with transitions occurring in the vicinity of the Fermi level. The analytic solution derived using the Dirac approximation captures accurately the first- and third-order responses in graphene, even at very high doping levels. The quadratic response of gapped graphene is also strongly enhanced by doping, even for systems with small gaps such as commensurate structures of graphene on SiC. The nonlinear response of bilayer graphene is significantly richer, combining the resonances that stem from doping with its intrinsic strong low-energy resonances.
description: Revised manuscript 18 pages, 6 figures
Countable ordinal spaces and compact countable subsets of a metric space
Creators: name: Álvarez-Samaniego, Borys
name: Merino, Andrés
Publisher: name: arXiv
Year: 2018
Subjects: subject: General Topology (math.GN)
subject: FOS: Mathematics
subject: 54A25, 03E15

description: We show in detail that every compact countable subset of a metric space is homeomorphic to a countable ordinal number, which extends a result given by Mazurkiewicz and Sierpinski for finite-dimensional Euclidean spaces. In order to achieve this goal, we use Transfinite Induction to construct a specific homeomorphism. In addition, we prove that for all metric space $(E,d)$, the cardinality of the set of all the equivalence classes $\mathscr{K}_E$, up to homeomorphisms, of compact countable subsets of $E$ is less than or equal to $\aleph_1$, i.e. $|\mathscr{K}_E| \le \aleph_1$. We also show that for all cardinal number $κ$ smaller than or equal to $\aleph_1$, there exists a metric space $(E_κ, d_κ)$ such that $|\mathscr{K}_{E_κ}|= κ$.
description: 15 pages
title: Casablanca-Fédala. - Etat actuel / Casablanca-Fédala. - Esquise d'ensemble (étude Ecochard)
title: Casablanca-Fédala. - Etat actuel / Casablanca-Fédala. - Esquise d'ensemble (étude Ecochard)
Creators: name: :Unkn
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2023
Subjects: subject: Aménagement du territoire
subject: Schéma d'aménagement

description: Cartographie
description: BESM-carto_1951-52-p032_52-03
description: 32
description: 52
description: Bulletin économique et social du Maroc
description: Source: Maison méditerranéenne des sciences de l'homme, Cité numérique de la Méditerranée (Cinumed), Bibliothèque nationale du Royaume du Maroc (BNRM)
description: Source: Bulletin économique et social du Maroc
description: Source: Bulletin économique et social du Maroc (BESM) > BESM (Cartographie)
description: Relation: https://cinumed.mmsh.univ-aix.fr/idurl/1/81737
description: Coverage: Maroc
description: Coverage: Casablanca
description: Coverage: XXe siècle
description: Temporal: XXe siècle
description: Bibliographic citation: « Casablanca-Fédala. - Etat actuel / Casablanca-Fédala. - Esquise d'ensemble (étude Ecochard) », In Bulletin économique et social du Maroc (BESM), n° 52, 1951
description: Provenance: Maison méditerranéenne des sciences de l'homme, Cité numérique de la Méditerranée (Cinumed), Bibliothèque nationale du Royaume du Maroc (BNRM)
description: Provenance: https://cinumed.mmsh.univ-aix.fr/
Quantum state decorrelation
Creators: name: D'Ariano, Giacomo M.
name: Demkowicz-Dobrzanski, Rafal
name: Perinotti, Paolo
name: Sacchi, Massimiliano F.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We address the general problem of removing correlations from quantum states while preserving local quantum information as much as possible. We provide a complete solution in the case of two qubits, by evaluating the minimum amount of noise that is necessary to decorrelate covariant sets of bipartite states. We show that two harmonic oscillators in arbitrary Gaussian state can be decorrelated by a Gaussian covariant map. Finally, for finite-dimensional Hilbert spaces, we prove that states obtained from most cloning channels (e.g., universal and phase-covariant cloning) can be decorrelated only at the expense of a complete erasure of information about the copied state. More generally, in finite dimension, cloning without correlations is impossible for continuous sets of states. On the contrary, for continuos variables cloning, a slight modification of the customary set-up for cloning coherent states allows one to obtain clones without correlations.
description: 11 pages, 2 figures, RevTex4
The Toys ‘R’ Us Challenge
Creators: name: Yoon, Silvia
Publisher: name: Carnegie Mellon University
Year: 1995
Subjects: subject: 170199 Psychology not elsewhere classified
subject: FOS: Psychology

description: From the time of Ancient Greece and Rome, children were viewed as little adults. The society did not understand the concept that children thought, behaved, acted, learned differently from adults and didn't understand why. The complexity of the behavior and development of children was not studied until the Renaissance period. Gradually the church and society grew an interest in studying children more theoretically and experimentally. Thus, society realized the importance the biological and environmental factors has on children in the early years of social, motor, perceptual, and cognitive development. Play, in the Renaissance period, was finally perceived as educational and stimulating in many different aspects of development. Realization of the significance of play instigated a tremendous boom in the toy industry and also concern, as caregivers, to provide a nourishing environment for the child to learn and develop in. In this paper, I will compare what makes a toy "good" or "bad" in terms of the positive and negative effects it has on the growth and development of a child.
title: ADCO, Cart. 186 (11 H 71), f. 0244v
Creators: name: de la Côte d'Or, Archives départementales
name: Petot, Frédéric
name: Archives Départementales De La Côte-D'Or
name: Petot, Frédérique
name: Projet CBMA
name: CBMA/CG21/F.PETOT/2012
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2020
Subjects: subject: cartulaire
subject: Corpus Burgundiae Medii Aevi
subject: Chartes de la Bourgogne du Moyen Âge
subject: LaMOP
subject: Laboratoire de Médiévistique Occidentale de Paris

description: Cartulaire général de Cîteaux, dit de Jean de Cirey, t. II (XVe siècle), tome II, Archives départementales de la Côte-d'Or, C
art. 186 (11 H 71). Numérisation en mode image.
description: Relation: http://www.cbma-project.eu/
description: Bibliographic citation: Cartulaire général de Cîteaux, dit de Jean de Cirey, t. II (XVe siècle), tome II, Archives départementales de la
 Côte-d'Or, Cart. 186 (11 H 71), f. 0244v, in Projet CBMA - Corpus Burgundiae Medii Aevi [Ressource en ligne], https://manuscrits.cbma-
project.eu/
description: Provenance: https://www.geonames.org/3024876
description: Provenance: http://www.idref.fr/030974844/id
description: Provenance: https://catalogue.bnf.fr/ark:/12148/cb12228351v
description: Provenance: abbaye de Cîteaux
description: Provenance: http://www.wikidata.org/entity/Q843261
title: How to Predict Financial Stress? An Assessment of Markov Switching Models
Creators: name: Duprey, Thibaut
name: Klaus, Benjamin
Publisher: name: Bank of Canada
Year: 2017

description: This paper predicts phases of the financial cycle by using a continuous financial stress measure in a Markov switching framework. The debt service ratio and property market variables signal a transition to a high financial stress regime, while economic sentiment indicators provide signals for a transition to a tranquil state. Whereas the in-sample analysis suggests that these indicators can provide an early warning signal up to several quarters prior to the respective regime change, the out-of-sample findings indicate that most of this performance is owing to the data gathered during the global financial crisis. Comparing the prediction performance with a standard binary early warning model reveals that the Markov switching model is outperforming the vast majority of model specifications for a horizon up to three quarters prior to the onset of financial stress.
description: Cette étude vise à prévoir les phases des cycles financiers grâce à une mesure de l’intensité des tensions financières intégrée dans un modèle de Markov avec changement de régime. Le ratio du service de la dette et les variables liées au marché de l’immobilier annoncent une transition vers un régime caractérisé par de fortes tensions financières. À l’inverse, les indicateurs mesurant la confiance des agents économiques annoncent la fin de la période de stress élevé. L’analyse des résultats sur échantillon montre que ces indicateurs peuvent offrir un signal précoce plusieurs trimestres avant que ne se produise le changement de régime considéré. Les résultats hors échantillon montrent, en revanche, que la performance des indicateurs repose pour l’essentiel sur les données constituées pendant la crise financière mondiale. La comparaison de la qualité des prédictions du modèle avec celles d’un modèle d’alerte précoce binaire standard révèle que le modèle de Markov à changement de régime surclasse la grande majorité des spécifications dans le cas d’un horizon pouvant atteindre trois trimestres avant le début des tensions financières.
A Predictive Inflationary Scenario Without The Gauge Singlet
Creators: name: Lazarides, G.
name: Shafi, Q.
Publisher: name: arXiv
Year: 1993
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We propose a new realization of the chaotic inflationary scenario in which the scalar field responsible for inflation also spontaneously breaks the underlying gauge symmetry at a superheavy scale $\sim 10^{15} - 10^{17}\; GeV$. A possible framework is provided by the superstring inspired gauge models, in which case several predictions are essentially model independent. The spectral index for the scalar perturbations $n \simeq 0.92 - 0.88$, while the ratio of the tensor to the scalar quadrupole anisotropy is $(ΔT/T)^2_T/(ΔT/T)^2_S \approx 0.4 - 0.7$. On smaller angular scales, $δT/T (1^\circ ) \approx (9 - 16) \times 10^{-6}$ and $δT/T (2.1^\circ ) \approx (6 - 10) \times 10^{-6}$. Implications for magnetic monopoles and cosmic strings as well as the gauge hierarchy problem are pointed out.
description: 13 pages, BA-93-17
Search for Spatial Extension in High-Latitude Sources Detected by the Fermi Large Area Telescope
Creators: name: LAT Collaboration
name: Biteau, Jonathan
Publisher: name: arXiv
Year: 2018
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present a search for spatial extension in high-latitude ($|b|>5^\circ$) sources in recent Fermi point source catalogs. The result is the Fermi High-Latitude Extended Sources Catalog, which provides source extensions (or upper limits thereof) and likelihood profiles for a suite of tested source morphologies. We find 24 extended sources, 19 of which were not previously characterized as extended. These include sources that are potentially associated with supernova remnants and star forming regions. We also found extended $γ$-ray emission in the vicinity of the Cen A radio lobes and - at GeV energies for the first time - spatially coincident with the radio emission of the SNR CTA 1, as well as from the Crab Nebula. We also searched for halos around active galactic nuclei, which are predicted from electromagnetic cascades that are induced by the $e^+e^-$ pairs that are deflected in intergalactic magnetic fields. These are produced when $γ$-rays interact with background radiation fields. We do not find evidence for extension in individual sources or in stacked source samples. This enables us to place limits on the flux of the extended source components, which are then used to constrain the intergalactic magnetic field a coherence length $λ\gtrsim 10\,$kpc, even when conservative assumptions on the source duty cycle are made. This improves previous limits by several orders of magnitude.
description: Published in ApJS. Corresponding Authors: Regina Caputo, Manuel Meyer, Matthew Wood. Electronic versions of the data products are available at http://www-glast.stanford.edu/pub_data/1261/ and https://zenodo.org/record/1324474
title: 02_0073
Creators: name: Wesley Baldwin, John
name: Baldwin, John W.
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2018
Subjects: subject: LaMOP
subject: Laboratoire de Médiévistique Occidentale de Paris

description: L'ensemble de ces notes ont été crée par John Baldwin lors d'une de ses premières périodes de résidence à Paris. Ces documents comprennent tous les magistri qu’il avait pu rencontrer dans ses sources. Aux XIIème et XIIIème siècles, les universités n'existant pas encore, le titre de magister s'il évoque certainement une compétence n'est pas rattaché de façon systématique au passage par les écoles. De surcroît, les magistris sont le plus souvent désignés par leur seul prénom. La lecture de ces données est donc difficile et suppose un long travail pour tenter d'identifier un individu auquel on pourrait rattacher plusieurs mentions. John Baldwin avait donc renoncé à utiliser ces données pour donner un prolongement à sa magnifique étude sur les gradués d'université et leur emploi par les Capétiens et les Plantagenêts. Néanmoins, il a conservé ces données et elles sont potentiellement très utile dans le cadre de Studium, comme le sont toutes les mentions dans les volumes des Fasti Ecclesiae Gallicanae de chanoines portant ce titre de magister sans autres précisions. L'ampleur des dépouillements rend ces données très utiles et nous devons une grande reconnaissance à John Baldwin pour avoir pris la peine de faire photocopier ses fiches et de nous les avoir transmises amicalement.
Les données ainsi que les images des fiches sont accessibles sur le site Internet à l'adresse suivante : http://studium-baldwin.lamop.fr/.
Les transcriptions des fiches ont été effectuées par des étudiants de Paris 1 Panthéon - Sorbonne mais elles n'ont pas été corrigées par la suite.
description: Relation: https://lamop.hypotheses.org/
On the Gupta-Bleuler Quantization of the Hamiltonian Systems with Anomalies
Creators: name: Kowalski-Glikman, J.
Publisher: name: arXiv
Year: 1992
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: As compared to the previous version, the example of Gupta-Bleuler quantization of massive electrodynamics was added, and the derivation of path integral for anomalous theories is further elaborated. This is the final version to be published in Annals of Physics.
description: 50 pages of plain LaTeX
title: Downward Nominal Wage Rigidity in Canada: Evidence Against a “Greasing Effect”
Creators: name: Wagner, Joel
Publisher: name: Bank of Canada
Year: 2017

description: The existence of downward nominal wage rigidity (DNWR) has often been used to justify a positive inflation target. It is traditionally assumed that positive inflation could “grease the wheels” of the labour market by putting downward pressure on real wages, easing labour market adjustments during a recession. A rise in the inflation target would attenuate the long-run level of unemployment and hasten economic recovery after an adverse shock. Following Daly and Hobijn (2014), we re-examine these issues in a model that accounts for precautionary motives in wage-setting behaviour. We confirm that DNWR generates a long-run negative relation between inflation and unemployment, in line with previous contributions to the literature. However, we also find that the increase in the number of people bound by DNWR following a negative demand shock rises with inflation, offsetting the beneficial effects of a higher inflation target. As an implication, contrary to previous contributions that neglected precautionary behaviour, the speed at which unemployment returns to pre-crisis levels during recessions is relatively unaffected by variations in the inflation target.
description: La rigidité à la baisse des salaires nominaux (RBSN) a souvent été invoquée pour justifier le ciblage d’un taux d’inflation positif. Il est communément admis qu’une inflation positive peut, en exerçant une pression à la baisse sur les salaires réels, « huiler les rouages » du marché du travail et faciliter les ajustements de ce marché durant les récessions. Le relèvement de la cible d’inflation aurait ainsi pour effet d’atténuer le chômage de long terme et d’accélérer la reprise économique après un choc défavorable. Dans le prolongement des travaux de Daly et Hobijn (2014), nous réexaminons ces questions à l’aide d’un modèle tenant compte des motifs de précaution qui influent sur les comportements de fixation des salaires. Nous confirmons que la RBSN engendre une relation de long terme négative entre l’inflation et l’emploi, ce qui concorde avec les résultats de contributions antérieures à la littérature sur le sujet. Nous constatons cependant que le nombre de travailleurs contraints par la RBSN à la suite d’un choc de demande négatif augmente avec l’inflation, ce qui compense les effets bénéfiques d’une cible d’inflation plus élevée. Il en découle, contrairement aux conclusions d’études antérieures qui passent sous silence les comportements dictés par la prudence, que les variations de la cible d’inflation ont relativement peu d’effet sur la vitesse à laquelle le taux de chômage retrouve ses niveaux d’avant-crise.
title: ADCO, Cinquième cartulaire de Saint-Étienne de Dijon (1664), Cart. 28 (G 132), 258 folios, f. 00301
Creators: name: de la Côte d'Or, Archives départementales
name: Archives Départementales De La Côte-D'Or
name: Petot, Frédérique
name: Projet CBMA
name: CG21/F.PETOT/2012
name: Petot, Frédéric
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: cartulaire
subject: LaMOP
subject: Laboratoire de Médiévistique Occidentale de Paris

description: Cinquième cartulaire de Saint-Étienne de Dijon (1664), Archives départementales de la Côte-d'Or, Cart. 28 (G 132), 258 folios, f. 00301, Numérisation en mode image.
description: Relation: http://www.cbma-project.eu/
description: Bibliographic citation: Cinquième cartulaire de Saint-Étienne de Dijon (1664), Archives départementales de la Côte-d'Or, Cart. 28 (G 132), 258 folios, f. 00301, in Projet CBMA - Corpus Burgundiae Medii Aevi [Ressource en ligne], https://manuscrits.cbma-project.eu/
description: Provenance: abbaye Saint-Étienne de Dijon
description: Provenance: http://www.wikidata.org/entity/Q15945019