cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Density of smooth maps for fractional Sobolev spaces $W^{s, p}$ into $\ell$ simply connected manifolds when $s \ge 1$
Creators: name: Bousquet, Pierre
name: Ponce, Augusto C.
name: Van Schaftingen, Jean
Publisher: name: arXiv
Year: 2012
Subjects: subject: Functional Analysis (math.FA)
subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: 58D15, 46E35

description: Given a compact manifold $N^n \subset \mathbb{R}^ν$, $s \ge 1$ and $1 \le p < \infty$, we prove that the class of smooth maps on the cube with values into $N^n$ is strongly dense in the fractional Sobolev space $W^{s, p}(Q^m; N^n)$ when $N^n$ is $\lfloor sp \rfloor$ simply connected. For $sp$ integer, we prove weak density of smooth maps with values into $N^n$ when $N^n$ is $sp - 1$ simply connected. The proofs are based on the existence of a retraction of $\mathbb{R}^ν$ onto $N^n$ except for a small subset of $N^n$ and on a pointwise estimate of fractional derivatives of composition of maps in $W^{s, p} \cap W^{1, sp}$.
description: 20 pages, abstract reformatted for MathJax
An Improved Combes-Thomas Estimate of Magnetic Schrödinger Operators
Creators: name: Shen, Zhongwei
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mathematical Physics (math-ph)
subject: Analysis of PDEs (math.AP)
subject: Spectral Theory (math.SP)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: Primary 81Q10, 47F05, Secondary 35P05

description: In the present paper, we prove an improved Combes-Thomas estimate, i.e., the Combes-Thomas estimate in trace-class norms, for magnetic Schrödinger operators under general assumptions. In particular, we allow unbounded potentials. We also show that for any function in the Schwartz space on the reals the operator kernel decays, in trace-class norms, faster than any polynomial.
description: 25 pages, some errors corrected
Geometric Phantom Categories
Creators: name: Gorchinskiy, Sergey
name: Orlov, Dmitri
Publisher: name: arXiv
Year: 2012
Subjects: subject: Algebraic Geometry (math.AG)
subject: Category Theory (math.CT)
subject: K-Theory and Homology (math.KT)
subject: FOS: Mathematics
subject: 14F05, 18E30, 14C35, 19E99

description: In this paper we give a construction of phantom categories, i.e. admissible triangulated subcategories in bounded derived categories of coherent sheaves on smooth projective varieties that have trivial Hochschild homology and trivial Grothendieck group. We also prove that these phantom categories are phantoms in a stronger sense, namely, they have trivial K-motives and, hence, all their higher K-groups are trivial too.
description: LaTeX, 18 pages
Probabilistic and Geometric Languages in the Context of the Principle of Least Action
Creators: name: Terekhovich, Vladislav
Publisher: name: arXiv
Year: 2012
Subjects: subject: History and Philosophy of Physics (physics.hist-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: This paper explores the issue of the unification of three languages of physics, the geometric language of forces, geometric language of fields or 4-dimensional space-time, and probabilistic language of quantum mechanics. On the one hand, equations in each language may be derived from the Principle of Least Action (PLA). On the other hand, Feynman's path integral method could explain the physical meaning of PLA. The axioms of classical and relativistic mechanics can be considered as consequences of Feynman's formulation of quantum mechanics.
description: 13 pages, 1 figures; translation from Russian corrected
Poincaré series for non-Riemannian locally symmetric spaces
Creators: name: Kassel, Fanny
name: Kobayashi, Toshiyuki
Publisher: name: arXiv
Year: 2012
Subjects: subject: Representation Theory (math.RT)
subject: Mathematical Physics (math-ph)
subject: Group Theory (math.GR)
subject: Spectral Theory (math.SP)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 22E40, 22E46, 58J50 (primary), 11F72, 53C35 (secondary)

description: The discrete spectrum of the Laplacian has been extensively studied on reductive symmetric spaces and on Riemannian locally symmetric spaces. Here we examine it for the first time in the general setting of non-Riemannian, reductive, locally symmetric spaces. For any non-Riemannian, reductive symmetric space X on which the discrete spectrum of the Laplacian is nonempty, and for any discrete group of isometries Gamma whose action on X is sufficiently proper, we construct L^2-eigenfunctions of the Laplacian on X_{Gamma}:=Gamma\X for an infinite set of eigenvalues. These eigenfunctions are obtained as generalized Poincaré series, i.e. as projections to X_{Gamma} of sums, over the Gamma-orbits, of eigenfunctions of the Laplacian on X. We prove that the Poincaré series we construct still converge, and define nonzero L^2-functions, after any small deformation of Gamma, for a large class of groups Gamma. In other words, the infinite set of eigenvalues we construct is stable under small deformations. This contrasts with the classical setting where the nonzero discrete spectrum varies on the Teichmüller space of a compact Riemann surface. We actually construct joint L^2-eigenfunctions for the whole commutative algebra of invariant differential operators on X_{Gamma}.
description: 141 pages, 1 figure. Previously entitled "Discrete spectrum for non-Riemannian locally symmetric spaces. I. Construction and stability"
Search for a fermiophobic Higgs boson in pp collisions at sqrt(s) = 7 TeV
Creators: name: CMS Collaboration
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Combined results are reported from searches for a fermiophobic Higgs boson in the gamma-gamma, WW, and ZZ decay modes in proton-proton collisions at sqrt(s) = 7 TeV. The explored Higgs boson mass range is 110-300 GeV. The data sample corresponds to an integrated luminosity of 4.9-5.1 inverse femtobarns. A fermiophobic Higgs boson is excluded at 95% confidence level in the mass range 110-194 GeV, and at 99% confidence level in the mass ranges 110-124.5 GeV, 127-147.5 GeV, and 155-180 GeV.
description: Submitted to the Journal of High Energy Physics
Parametric representation of open quantum systems and crossover from quantum to classical environment
Creators: name: Calvani, Dario
name: Cuccoli, Alessandro
name: Gidopoulos, Nikitas
name: Verrucchi, Paola
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We propose an approach to the study of open quantum systems based on a parametric representation of the principal system. The representation is obtained introducing generalized coherent states for the environment, and is such that the evolution from a fully quantum environment to a classical one can be inherently followed. The method is applied to the specific case where the principal system is a central qubit and the environment is a surrounding ring of interacting spins, with the overall Hamiltonian being that of the $s=1/2$ Heisenberg star with frustration. In this case the quantum character of the environment, embodied by the total spin $S$ of the ring, can be physically varied by acting on the ratio between the couplings entering the Hamiltonian, and formally followed by increasing $S$. We find that when the star is in any of its eigenstates, the qubit behaves as if it were under the effect of an external magnetic field, whose direction in real space is set by the variables defining the environmental coherent states, and is hence broadened according to their quantum probability distribution. When the quantum character of the environment is reduced, such distribution becomes narrower, finally collapsing into a Dirac-$δ$ as $S\to\infty$. The entanglement between the central qubit and its environment remains well defined even in this limit, where it comes across as the binary entropy of the $2π$-normalized Berry phase characterizing the dynamics of a qubit in an adiabatically precessing magnetic field.
description: 8 pages, 2 figures
¿Cómo nació MetaDocencia?
Creators: name: Ación, Laura
Publisher: name: Zenodo
Year: 2023
Subjects: Cursos
docencia
pedagogía
clases virtuales
enseñanza
Latin America
Teaching
Comunidad
Ciencia Abierta

description: Laura Ación compartió los hitos que dieron origen a MetaDocencia en el artículo (en inglés) MetaDocencia: Enseñar a enseñar (Bioinformática y más) en línea en español, publicado el 13 de enero de 2021. Cumpliendo el tercer año de MetaDocencia, nos pareció un buen momento para traducir y adaptar aquella publicación y darle espacio en esta nota.
Engineering of nonclassical motional states in optomechanical systems
Creators: name: Xu, Xun-Wei
name: Wang, Hui
name: Zhang, Jing
name: Liu, Yu-xi
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We propose to synthesize arbitrary nonclassical motional states in optomechanical systems by using sideband excitations and photon blockade. We first demonstrate that the Hamiltonian of the optomechanical systems can be reduced, in the strong single-photon optomechanical coupling regime when the photon blockade occurs, to one describing the interaction between a driven two-level trapped ion and the vibrating modes, and then show a method to generate target states by using a series of classical pulses with desired frequencies, phases, and durations. We further analyze the effect of the photon leakage, due to small anharmonicity, on the fidelity of the expected motional state, and study environment induced decoherence. Moreover, we also discuss the experimental feasibility and provide operational parameters using the possible experimental data.
description: 11 pages, 4 figures
Validity and reliability of the Arabic version of Muller’s prenatal attachment inventory
Creators: name: Arafah, Dima
name: Thomas, Bejoy
name: Fenton, Tanis R.
name: Sabr, Yasser
name: Metcalfe, Amy
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Biochemistry
subject: Space Science
subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Cell Biology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Sociology
subject: FOS: Sociology
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences

description: Maternal fetal attachment (MFA) is the bond between the mother and her unborn baby. Presently no tools measuring MFA are available in Arabic. The aim of this study was to translate Muller’s Prenatal Attachment Inventory (PAI) from English to Arabic, examine the cultural appropriateness of this tool, and test its psychometric properties with pregnant women in an Arab country. The PAI was translated from English into Arabic using the Universal Translation Approach (modified tool) and assessed for content validity. During this process four additional items were identified for measurement relevance and cultural acceptability resulting in the revised tool. The psychometric properties of the modified and revised tools were assessed after 250 pregnant Arab women completed the PAI. Factor analysis was conducted to assess construct validity, while reliability was assessed using Cronbach’s alpha coefficient. Both tools were shown to be unidimensional with excellent reliability (Cronbach’s alpha = 0.88 for the modified tool and 0.89 for the revised tool). Nulliparity, planning to breastfeed the baby, feeling fetal movements, and downloading a smartphone app to follow the baby’s growth were associated with increased MFA in the PAI, while only planning to breastfeed the baby, feeling fetal movements, and downloading a smartphone app to follow the baby’s growth were associated with increased MFA in the revised PAI. The Arabic version of the PAI is a culturally appropriate tool to measure MFA amongst Arabic-speaking women.
Local orthogonality as a multipartite principle for quantum correlations
Creators: name: Fritz, T.
name: Sainz, A. B.
name: Augusiak, R.
name: Brask, J. B.
name: Chaves, R.
name: Leverrier, A.
name: Acín, A.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In recent years, the use of information principles to understand quantum correlations has been very successful. Unfortunately, all principles considered so far have a bipartite formulation, but intrinsically multipartite principles, yet to be discovered, are necessary for reproducing quantum correlations. Here, we introduce local orthogonality, an intrinsically multipartite principle stating that events involving different outcomes of the same local measurement must be exclusive, or orthogonal. We prove that it is equivalent to no-signaling in the bipartite scenario but more restrictive for more than two parties. By exploiting this non-equivalence, it is then demonstrated that some bipartite supra-quantum correlations do violate local orthogonality when distributed among several parties. Finally, we show how its multipartite character allows revealing the non-quantumness of correlations for which any bipartite principle fails. We believe that local orthogonality is a crucial ingredient for understanding no-signaling and quantum correlations.
description: 14 pages, 5 figures; v2 contains information processing interpretation; v3 is the published version
Search for new physics in the multijet and missing transverse momentum final state in proton-proton collisions at sqrt(s) = 7 TeV
Creators: name: CMS Collaboration
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: A search for physics beyond the standard model is performed in events with at least three jets and large missing transverse momentum produced in proton-proton collisions at sqrt(s) = 7 TeV. No significant excess of events above the expected backgrounds is observed in 4.98 inverse femtobarns of data collected with the CMS detector at the Large Hadron Collider. The results are presented in the context of the constrained minimal supersymmetric extension of the standard model and more generically for simplified models. For the simplified models of gluino-gluino and squark-squark production, gluino masses below 1.0 TeV and squark masses below 0.76 TeV are excluded in case the lightest supersymmetric particle mass is below 200 GeV. These results significantly extend previous searches.
description: Submitted to Physical Review Letters
Study of the inclusive production of charged pions, kaons, and protons in pp collisions at sqrt(s) = 0.9, 2.76, and 7 TeV
Creators: name: CMS Collaboration
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Spectra of identified charged hadrons are measured in pp collisions at the LHC for sqrt(s) = 0.9, 2.76, and 7 TeV. Charged pions, kaons, and protons in the transverse-momentum range pt approximately 0.1-1.7 GeV and for rapidities abs(y) < 1 are identified via their energy loss in the CMS silicon tracker. The average pt increases rapidly with the mass of the hadron and the event charged-particle multiplicity, independently of the center-of-mass energy. The fully corrected pt spectra and integrated yields are compared to various tunes of the PYTHIA6 and PYTHIA8 event generators.
description: Submitted to the European Physical Journal C
¿Cómo organizar las pestañas y ventanas para dar una clase virtual sincrónica?
Creators: name: Palopoli, Nicolás
name: Pendino, Romina
Publisher: name: Zenodo
Year: 2022
Subjects: Cursos
docencia
pedagogía
clases virtuales
enseñanza
Latin America
Teaching
Comunidad
Ciencia Abierta

description: En nuestras clases sincrónicas muchas veces necesitamos compartir pantalla a través de una plataforma de videollamada (Zoom, Meet, Jitsi, etc). En ocasiones, y al mismo tiempo, podríamos necesitar acceso al chat, a un documento de Word o de Google, o a las notas de orador de nuestra presentación. Si a eso le agregamos las ventajas de observar a las otras personas que están en la reunión para que sus gestos y su lenguaje no verbal faciliten el feedback, se vuelve complejo mantener y acceder con facilidad tantas ventanas abiertas. En esta nota, te recomendamos una de las maneras posibles de organizar las ventanas para no perder de vista ningún canal de comunicación con quienes asisten a nuestros cursos.
Towards a double field theory on para-Hermitian manifolds
Creators: name: Vaisman, Izu
Publisher: name: arXiv
Year: 2012
Subjects: subject: Differential Geometry (math.DG)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 53C15, 53C80

description: In a previous paper, we have shown that the geometry of double field theory has a natural interpretation on flat para-Kähler manifolds. In this paper, we show that the same geometric constructions can be made on any para-Hermitian manifold. The field is interpreted as a compatible (pseudo-)Riemannian metric. The tangent bundle of the manifold has a natural, metric-compatible bracket that extends the C-bracket of double field theory. In the para-Kähler case this bracket is equal to the sum of the Courant brackets of the two Lagrangian foliations of the manifold. Then, we define a canonical connection and an action of the field that correspond to similar objects of double field theory. Another section is devoted to the Marsden-Weinstein reduction in double field theory on para-Hermitian manifolds. Finally, we give examples of fields on some well-known para-Hermitian manifolds.
description: LaTex, 36 pages. Language improvements, references added and the definition of action changed. To appear in J. of Math. Phys
FI-modules over Noetherian rings
Creators: name: Church, Thomas
name: Ellenberg, Jordan S.
name: Farb, Benson
name: Nagpal, Rohit
Publisher: name: arXiv
Year: 2012
Subjects: subject: Representation Theory (math.RT)
subject: Algebraic Topology (math.AT)
subject: Combinatorics (math.CO)
subject: Geometric Topology (math.GT)
subject: FOS: Mathematics

description: FI-modules were introduced by the first three authors in [CEF] to encode sequences of representations of symmetric groups. Over a field of characteristic 0, finite generation of an FI-module implies representation stability for the corresponding sequence of S_n-representations. In this paper we prove the Noetherian property for FI-modules over arbitrary Noetherian rings: any sub-FI-module of a finitely generated FI-module is finitely generated. This lets us extend many of the results of [CEF] to representations in positive characteristic, and even to integral coefficients. We focus on three major applications of the main theorem: on the integral and mod p cohomology of configuration spaces; on diagonal coinvariant algebras in positive characteristic; and on an integral version of Putman's central stability for homology of congruence subgroups.
description: 32 pages; v2: reorganized paper, expanded introduction and added Theorems B and C
Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC
Creators: name: The CMS Collaboration
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Results are presented from searches for the standard model Higgs boson in proton-proton collisions at sqrt(s) = 7 and 8 TeV in the Compact Muon Solenoid experiment at the LHC, using data samples corresponding to integrated luminosities of up to 5.1 inverse femtobarns at 7 TeV and 5.3 inverse femtobarns at 8 TeV. The search is performed in five decay modes: gamma gamma, ZZ, WW, tau tau, and b b-bar. An excess of events is observed above the expected background, with a local significance of 5.0 standard deviations, at a mass near 125 GeV, signalling the production of a new particle. The expected significance for a standard model Higgs boson of that mass is 5.8 standard deviations. The excess is most significant in the two decay modes with the best mass resolution, gamma gamma and ZZ; a fit to these signals gives a mass of 125.3 +/- 0.4 (stat.) +/- 0.5 (syst.) GeV. The decay to two photons indicates that the new particle is a boson with spin different from one.
description: Submitted to Phys. Lett. B
Simulation of stochastic quantum systems using polynomial chaos expansions
Creators: name: Young, Kevin C.
name: Grace, Matthew D.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We present an approach to the simulation of quantum systems driven by classical stochastic processes that is based on the polynomial chaos expansion, a well-known technique in the field of uncertainty quantification. The polynomial chaos expansion represents the system density matrix as a series of orthogonal polynomials in the principle components of the stochastic process and yields a sparsely coupled hierarchy of linear differential equations. We provide practical heuristics for truncating this expansion based on results from time-dependent perturbation theory and demonstrate, via an experimentally relevant one-qubit numerical example, that our technique can be significantly more computationally efficient than Monte Carlo simulation.
description: 5 pages, 2 figures
Jörg Schweigard, Aufklärung und Revolutionsbegeisterung. Die katholischen Universitäten in Mainz, Heidelberg und Würzburg im Zeitalter der Französischen Revolution (1789–1792/93–1803), 2000
Creators: name: Bois, Pierre-André
Publisher: name: Francia
Year: 2019

description: Francia, Bd. 32 Nr. 2 (2005)
Acciones para crear y apoyar comunidades científicas de código abierto en África y América Latina
Creators: name: Mboa, Thomas
name: Van Der Walt, Anelda
name: Fernandez-Valverde, Selene L
name: Federici, Fernan
name: Ación, Laura
name: Tsang, Emmy
name: Ascenzi, Laura
Publisher: name: Zenodo
Year: 2023
Subjects: Open Science
Ciencia Abierta
Community Building
Comunidades
Open Source

description: Una idea central para la ciencia abierta y el código abierto es que todo el mundo, sin importar dónde se encuentre, debe poder contribuir, participar y beneficiarse del desarrollo de la ciencia y la tecnología. En el panel sobre construcción de comunidades de ciencia y código abierto en África y América Latina desarrollado en la Reunión Anual de Ciencia Abierta 2022 de la Chan Zuckerberg Initiative(CZI), cinco líderes de proyectos de ciencia de código abierto que han trabajado extensamente con comunidades africanas y latinoamericanas compartieron sus experiencias y aprendizajes. El video completo del panel puede verse con subtítulos en español, portugués e inglés. En esta publicación nos centramos en las acciones a corto, medio y largo plazo que financiadores, investigadores y otros actores pueden llevar a cabo para eliminar algunas de las barreras a la participación, basándonos en las contribuciones de panelistas y moderadores del panel
South Africa’s local content policies: challenges and lessons to consider - Local Content.pdf
Creators: name: Edgars, Prof Tal
Publisher: name: figshare
Year: 2022
Subjects: Research, science and technology policy
Social policy
Urban policy
Information governance, policy and ethics
Education policy
Economic development policy
Risk policy
Economics, business and management curriculum and pedagogy
Mathematical economics
International economics
Public economics - public choice
Financial economics
Public economics - taxation and revenue
Urban and regional economics
Labour economics
Macroeconomics (incl. monetary and fiscal theory)
Industry economics and industrial organisation
Microeconomic theory
Socio-economic development
Comparative economic systems
Economic theory not elsewhere classified

description: To perhaps give impetus to the definition of local content, it would only be fair to then discuss it in the thinking behind the South African context. I invite the readers to join my me in using South Africa as a case study. South Africa through its Industrial Policy Action Plan (IPAP) identifies local content as a strategic industrial policy instrument, which can be used to leverage the power of public procurement; reduce the country’s trade deficit; address market failures; foster infant industries; and increase the governments tax base (the dti, 2016). Although local content is a commonly used industrial policy lever, and much has been done in South Africa to use this policy instrument, a number of constraints hamper its effective use, including the lack of a common definition, procurement processes, effective monitoring and information sharing.
 I would love to draw my argument on towards the modelling the economic multipliers of local content and the maximum price premium the state should consider paying in evaluating the benefits of buying local versus buying imported products. I will also attempt to assess the key challenges and lessons of local content policies in South Africa that might be slightly similar in an African context. In particular, to be able to analyse the economic rationale driving the argument for the use of local content policies. As I deep dive into my assessment, I will highlight the reasons why local content policies are not resulting in the desired level of local procurement, and suggest possible measures that could be implemented.
Holographic screens in ultraviolet self-complete quantum gravity
Creators: name: Nicolini, Piero
name: Spallucci, Euro
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In this paper we study the geometry and the thermodynamics of a holographic screen in the framework of the ultraviolet self-complete quantum gravity. To achieve this goal we construct a new static, neutral, non-rotating black hole metric, whose outer (event) horizon coincides with the surface of the screen. The space-time admits an extremal configuration corresponding to the minimal holographic screen and having both mass and radius equalling the Planck units. We identify this object as the space-time fundamental building block, whose interior is physically unaccessible and cannot be probed even during the Hawking evaporation terminal phase. In agreement with the holographic principle, relevant processes take place on the screen surface. The area quantization leads to a discrete mass spectrum. An analysis of the entropy shows that the minimal holographic screen can store only one byte of information while in the thermodynamic limit the area law is corrected by a logarithmic term.
description: 18 pages, 4 figures; v2 additional references; v3 shortened version in press as invited contribution to "Black hole Physics'', special issue of Advances of High Energy Physics edited by X. Zeng, C. Corda and D. Chen
Some How-Tos for Building and Supporting Open Source Science Communities in Africa and Latin America
Creators: name: Mboa, Thomas
name: Van Der Walt, Anelda
name: Fernandez-Valverde, Selene L
name: Federici, Fernan
name: Ación, Laura
name: Tsang, Emmy
name: Ascenzi, Laura
Publisher: name: Zenodo
Year: 2023
Subjects: Ciencia Abierta
Community Building
open science
Open Source
Comunidad
Latin America

description: Central to open science and open source is the idea that everyone, no matter where they are in the world, should be able to contribute to, engage with, and benefit from the development of science and technology. In the fireside chat “Building and supporting open source science communities in Africa and Latin America”, developed at the Chan Zuckerberg Initiative (CZI) Open Science 2022 Annual Meeting, five leaders of open source science initiatives who have worked extensively with African and Latin American communities shared what they have experienced and learnt. The entire Fireside Chat video can be viewed with captions in Spanish, Portuguese, and English. In this post we focus on short-, medium- and long-term actions that funders, researchers, and others can take to remove some of the barriers to participation, based on the contributions of the panelists and moderators of the Fireside Chat.
Perturbative correlation functions of null Wilson loops and local operators
Creators: name: Alday, Luis F.
name: Heslop, Paul
name: Sikorowski, Jakub
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider the correlation function of a null Wilson loop with four edges and a local operator in planar MSYM. By applying the insertion procedure, developed for correlation functions of local operators, we give an integral representation for the result at one and two loops. We compute explicitly the one loop result and show that the two loop result is finite.
description: 17 pages, 3 figures; v2: correction of a typo
A generalized telegraph process with velocity driven by random trials
Creators: name: Crimaldi, Irene
name: Di Crescenzo, Antonio
name: Iuliano, Antonella
name: Martinucci, Barbara
Publisher: name: arXiv
Year: 2012
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 60K15, 60K37

description: We consider a random trial-based telegraph process, which describes a motion on the real line with two constant velocities along opposite directions. At each epoch of the underlying counting process the new velocity is determined by the outcome of a random trial. Two schemes are taken into account: Bernoulli trials and classical Pólya urn trials. We investigate the probability law of the process and the mean of the velocity of the moving particle. We finally discuss two cases of interest: (i) the case of Bernoulli trials and intertimes having exponential distributions with linear rates (in which, interestingly, the process exhibits a logistic stationary density with non-zero mean), and (ii) the case of Pólya trials and intertimes having first Gamma and then exponential distributions with constant rates.
description: 26 pages, 8 figures
Buenas prácticas para crear presentaciones accesibles
Creators: name: Rajngewerc, Mariela
name: Loto, Patricia
Publisher: name: Zenodo
Year: 2022
Subjects: accesibilidad
inclusión
trabajo colaborativo
recursos abiertos
ciencia abierta
equidad
enseñanza

description: Al momento de dar una clase o una charla muchas veces solemos utilizar presentaciones que nos ayudan a explicar y clarificar los conceptos que estamos exponiendo. Este posteo está dedicado a repasar una serie de sugerencias que permitirán que tus presentaciones puedan ser aprovechadas por una mayor cantidad de personas. Además, al final del posteo adjuntamos un pdf con una checklist (o sea, una lista de ítems a verificar) para que utilices como recordatorio al momento de crear tus presentaciones.
Azimuthal decorrelation in $t\bar{t}$ production at hadron colliders
Creators: name: Choi, Suyong
name: Lee, Hyun Su
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We present a new observable, $Δϕ$, an azimuthal angle difference between $t$ and $\bar{t}$ quarks in $t\bar{t}$ pair production, at hadron colliders as an interesting probe of the radiative quantum chromodynamics process as well as a high-order correction in the high-mass regime. This variable also enables good discrimination on some new physics models that may explain the forward-backward charge asymmetry of $t\bar{t}$ production measured at the Tevatron. With a reliable estimation of the dataset obtained up to 2011 at the Tevatron and Large Hadron Collider, we present an opportunity for testing the standard model as well as searching new physics models with the $Δϕ$ observable.
description: 8 pages, 6 figures
Ein Flintplatz der Ahrensburger Kultur bei Neumühlen, Kr. Verden/Aller
Creators: name: Deichmüller, Jürgen
Publisher: name: Nachrichten aus Niedersachsens Urgeschichte
Year: 2019

description: Nachrichten aus Niedersachsens Urgeschichte, Bd. 34 (1965): Nachrichten aus Niedersachsens Urgeschichte
Körber-Grohne, U.: Bestimmungsschlüssel für subfossile Juncus-Samen und Gramineen-Früchte
Creators: name: Beug, Hans-Jürgen
Publisher: name: Nachrichten aus Niedersachsens Urgeschichte
Year: 2019

description: Rezension zu: Körber-Grohne, U.: Bestimmungsschlüssel für subfossile Juncus-Samen und Gramineen-Früchte. Probleme der Küstenforschung im südlichen Nordseegebiet, Bd. 7: 1—47 (1964)
description: Nachrichten aus Niedersachsens Urgeschichte, Bd. 34 (1965): Nachrichten aus Niedersachsens Urgeschichte
Cómo las evaluaciones durante la clase pueden mejorar el aprendizaje
Creators: name: Formoso, Jesica
Publisher: name: Zenodo
Year: 2023
Subjects: Cursos,
docencia
pedagogía
clases virtuales
enseñanza
Latin America
Teaching
Comunidad
Ciencia Abierta

description: Las evaluaciones no sólo miden el conocimiento, también ayudan a fortalecerlo. En esta nota competimos consejos para la implementación de evaluaciones formativas:
Extinction probability and total progeny of predator-prey dynamics on infinite trees
Creators: name: Bordenave, Charles
Publisher: name: arXiv
Year: 2012
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 60J80

description: We consider the spreading dynamics of two nested invasion clusters on an infinite tree. This model was defined as the chase-escape model by Kordzakhia and it admits a limit process, the birth-and-assassination process, previously introduced by Aldous and Krebs. On both models, we prove an asymptotic equivalent of the extinction probability near criticality. In the subcritical regime, we give a tail bound on the total progeny of the preys before extinction.
description: 33 pages, 4 figures
Data management in perspective: the career profile of clinical psychologists
Creators: name: Molloy, Laura
name: Snow, Kellie
name: Goldstein, Stephane
name: Davidson, Joy
Publisher: name: Zenodo
Year: 2021
Subjects: clinical psychology, career profile, research data management

description: The Data Management Skills Support Initiative (DaMSSI) has drawn together a range of short career profiles to illustrate the relevance of data management skills to four graduate professions represented by training projects of the JISC Managing Research Data programme 2009-13. These professions are: conservator; social science researcher; clinical psychologist and archaeologist. In addition a fifth profile describes the role of data manager. Each profile demonstrates how the value of data management skills learned alongside other research skills during graduate and postgraduate study contributes to and underpins high-quality professional performance.
 DaMSSI has developed this career profile for describing the work of clinical psychologists, to help raise awareness about this profession.
description: The project is described here: https://core.ac.uk/download/pdf/296147915.pdf
Nowothnig, Walter: Brandgräber der Völkerwanderungszeit im südlichen Niedersachsen
Creators: name: Mildenberger, Gerhard
Publisher: name: Nachrichten aus Niedersachsens Urgeschichte
Year: 2019

description: Rezension zu: Nowothnig, Walter: Brandgräber der Völkerwanderungszeit im südlichen Niedersachsen. Göttinger Schriften zur Vor- und Frühgeschichte Bd. 4. Neumünster (Wachholtz) 1964, 127 S., 27 Taf., 6 Abb., 3 Karten
description: Nachrichten aus Niedersachsens Urgeschichte, Bd. 34 (1965): Nachrichten aus Niedersachsens Urgeschichte
Influences of Excluded Volume of Molecules on Signaling Processes on Biomembrane
Creators: name: Fujii, Masashi
name: Nishimori, Hiraku
name: Awazu, Akinori
Publisher: name: arXiv
Year: 2012
Subjects: subject: Biomolecules (q-bio.BM)
subject: Cellular Automata and Lattice Gases (nlin.CG)
subject: Biological Physics (physics.bio-ph)
subject: Molecular Networks (q-bio.MN)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: We investigate the influences of the excluded volume of molecules on biochemical reaction processes on 2-dimensional surfaces using a model of signal transduction processes on biomembranes. We perform simulations of the 2-dimensional cell-based model, which describes the reactions and diffusion of the receptors, signaling proteins, target proteins, and crowders on the cell membrane. The signaling proteins are activated by receptors, and these activated signaling proteins activate target proteins that bind autonomously from the cytoplasm to the membrane, and unbind from the membrane if activated. If the target proteins bind frequently, the volume fraction of molecules on the membrane becomes so large that the excluded volume of the molecules for the reaction and diffusion dynamics cannot be negligible. We find that such excluded volume effects of the molecules induce non-trivial variations of the signal flow, defined as the activation frequency of target proteins, as follows. With an increase in the binding rate of target proteins, the signal flow varies by i) monotonically increasing; ii) increasing then decreasing in a bell-shaped curve; or iii) increasing, decreasing, then increasing in an S-shaped curve. We further demonstrate that the excluded volume of molecules influences the hierarchical molecular distributions throughout the reaction processes. In particular, when the system exhibits a large signal flow, the signaling proteins tend to surround the receptors to form receptor-signaling protein clusters, and the target proteins tend to become distributed around such clusters. To explain these phenomena, we analyze the stochastic model of the local motions of molecules around the receptor.
description: 31 pages, 10 figures
Brief an Kaiserin von Russland Anna
Creators: name: Bernoulli, Daniel
Publisher: name: [s.n.]
Year: 1732

description: Bittgesuch des Daniel Bernoulli an Kaiserin Anna, Juli 1732, ihm den Titel Honorarprofessor mit einem Gehalt von 200 Rubeln zuzuerkennen, sofern er ins Ausland gehe, oder ihm, wenn er in Petersburg bleibe, den Titel Hofrat mit einem Gehalt von [...] zu gewähren. (siehe Beilage)
description: von Daniel I Bernoulli
description: Altkirchenslawisch
description: Datenimport aus LIDOS / Bernoulli (2004-07-02)
description: Verzeichnung=Description=Inventaire September 2023 HAN-Katalogisierungsregeln Revision nach Vorlage nni
description: 2 Notizzettel
Data management in perspective: the career profile of social science researchers
Creators: name: Molloy, Laura
name: Snow, Kellie
name: Goldstein, Stephane
name: Davidson, Joy
Publisher: name: Zenodo
Year: 2011
Subjects: social science research, research data management, career profile,

description: The Data Management Skills Support Initiative (DaMSSI) has drawn together a range of short career profiles to illustrate the relevance of data management skills to four graduate professions represented by training projects of the JISC Managing Research Data programme 2009-13. These professions are: conservator; social science researcher; clinical psychologist and archaeologist. In addition a fifth profile describes the role of data manager. Each profile demonstrates how the value of data management skills learned alongside other research skills during graduate and postgraduate study contributes to and underpins high-quality professional performance.
 DaMSSI has developed this career profile for describing the work of social science researchers, to help raise awareness about this profession.
description: The project is described here: https://core.ac.uk/download/pdf/296147915.pdf
Comunidades de práctica y su influencia en la difusión de la ciencia abierta en Latinoamérica
Creators: name: Formoso, Jesica
name: Loto, Patricia A.
name: Rajngewerc, Mariela
name: Ascenzi, Laura
Publisher: name: Zenodo
Year: 2023
Subjects: comunidades de práctica
ciencia abierta
open science
open source
comunidades

description: Nos preguntamos cuál es el rol de las comunidades de práctica en la difusión e implementación de prácticas de ciencia abierta en general, y específicamente, en la región de Latinoamérica.
Periodic Orbits of Hamiltonian Systems Linear and Hyperbolic at Infinity
Creators: name: Gurel, Basak Z.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Symplectic Geometry (math.SG)
subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics

description: We consider Hamiltonian diffeomorphisms of the Euclidean space, generated by compactly supported time-dependent perturbations of hyperbolic quadratic forms. We prove that, under some natural assumptions, such a diffeomorphism must have simple periodic orbits of arbitrarily large period when it has fixed points which are not necessary from a homological perspective.
description: 21 pages; substantially revised, final version; to appear in Pacific Journal of Mathematics
Periodic wavelet frames and time-frequency localization
Creators: name: Lebedeva, Elena A.
name: Prestin, Jürgen
Publisher: name: arXiv
Year: 2012
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 42C40, 42C15

description: A family of Parseval periodic wavelet frames is constructed. The family has optimal time-frequency localization (in the sense of the Breitenberger uncertainty constant) with respect to a family parameter and it has the best currently known localization with respect to a multiresolution analysis parameter.
description: 10 pages, 2 figures
Brief an Jacob II Bernoulli
Creators: name: Daškova, Ekaterina R.
Publisher: name: [s.n.]
Year: 1786

description: Berufungsschreiben für Jacob II Bernoulli als Adjunkt an die Akademie zu St. Petersburg
description: von Ekaterina Romanowa Fürstin Daschkowa
description: Bl. 2: leer
description: Brief von der Hand eines Sekretärs mit eigenhändiger Unterschrift von Ekaterina Romanowa Fürstin Daschkowa
description: Öffentliche Bibliothek der Universität Basel
description: Deutsch
description: Datenimport aus LIDOS / Bernoulli (2004-07-02)
description: Verzeichnung=Description=Inventaire September 2023 HAN-Katalogisierungsregeln Revision nach Vorlage nni
Kaufbrief über eine Rente viagère
Creators: name: [s.n.]
Publisher: name: [s.n.]
Year: 1735

description: Öffentliche Bibliothek der Universität Basel
description: Französisch
description: Verzeichnung=Description=Inventaire August 2023 HAN-Katalogisierungsregeln Vollständige Rekatalogisierung nach Verzeichnis Bernoulli Archiv und Original nni
Brief an Barbara [Amerbach]
Creators: name: Rechberger-Amerbach, Margaretha
Publisher: name: [s.n.]
Year: 1498

description: von Margret [Amerbach]
description: Deutsch
description: Druck: Die Amerbachkorrespondenz / bearb. und hrsg. von Alfred Hartmann. I. Band. - Basel : Verl. der Universitätsbibliothek, 1942, Nr. 87
description: Verzeichnung=Description=Inventaire September 2012 Vollständige Rekatalogisierung nach Standortverzeichnis G II 1 - G II 33 und Briefkatalog
description: Digitalisierung=Digitization=Numérisation Februar 2022 TIFF
Das Kavitationsverhalten von Drehkolbenpumpen
Creators: name: Zenke, Thomas
name: Türk, Meno
name: Verhülsdonk, Burkhard
Publisher: name: LANDTECHNIK
Year: 2004

description: Das Kavitationsverhalten ist für die Pumpenauslegung von großer Bedeutung. Kavitation führt zu instabilen Förderzuständen und erzeugt dabei typische Geräusche. Sie tritt in der Pumpe an den Stellen mit den größten Strömungsgeschwindigkeiten auf. Die wichtigsten Einflussgrößen auf das Kavitationsverhalten von schräg verzahnten Drehkolbenpumpen, wie die Pumpendrehzahl, der Kolbenverschleiß, die Viskosität des Fördermediums und der Förderdruck werden untersucht und bewertet.
description: LANDTECHNIK, Bd. 59 Nr. 1 (2004)
The mass and angular momentum distribution of simulated massive early-type galaxies to large radii
Creators: name: Wu, Xufen
name: Gerhard, Ortwin
name: Naab, Thorsten
name: Oser, Ludwig
name: Martinez-Valpuesta, Inma
name: Hilz, Michael
name: Churazov, Eugene
name: Lyskova, Natalya
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We study the dark and luminous mass distributions, circular velocity curves (CVC), line-of-sight kinematics, and angular momenta for a sample of 42 cosmological zoom simulations of massive galaxies. Using a temporal smoothing technique, we are able to reach large radii. We find that: (i)The dark matter halo density profiles outside a few kpc follow simple power-law models, with flat dark matter CVCs for lower-mass systems, and rising CVCs for high-mass haloes. The projected stellar density distributions at large radii can be fitted by Sersic functions with n>10, larger than for typical ETGs. (ii)The massive systems have nearly flat total CVCs at large radii, while the less massive systems have mildly decreasing CVCs. The slope of the CVC at large radii correlates with v_circ itself. (iii)The dark matter fractions within Re are in the range 15-30% and increase to 40-65% at 5Re. Larger and more massive galaxies have higher dark matter fractions. (iv)The short axes of simulated galaxies and their host dark matter haloes are well aligned and their short-to-long axis ratios are correlated. (v)The stellar vrms(R) profiles are slowly declining, in agreement with planetary nebulae observations in the outer haloes of most ETGs. (vi)The line-of-sight velocity fields v show that rotation properties at small and large radii are correlated. Most radial profiles for the cumulative specific angular momentum parameter lambda(R) are nearly flat or slightly rising, with values in [0.06,0.75] from 2Re to 5Re. (vii)Stellar mass, ellipticity at 5Re, and lambda(5Re) are correlated: the more massive systems have less angular momentum and are rounder, as for observed ETGs. (viii)More massive galaxies with a large fraction of accreted stars have radially anisotropic velocity distributions outside Re. Tangential anisotropy is seen only for galaxies with high fraction of in-situ stars. (Full abstract in PDF)
description: 17 pages, 15 figures, 2 tables, accepted by MNRAS
Curso Cómo enseñar a programar online
Creators: name: MetaDocencia Team
Publisher: name: Zenodo
Year: 2023
Subjects: Cursos
docencia
pedagogía
clases virtuales
enseñanza
Latin America
Teaching
Comunidad
Ciencia Abierta

description: Presentación del curso cuyo objetivo es introducir técnicas y buenas prácticas para diseñar tus cursos de programación y evaluar a tus estudiantes.