cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Data Handlers
Creators: name: Gallagher, James
name: Potter, Nathan
name: West, Patrick
Publisher: name: Zenodo
Year: 2007

description: This presentation was part of a 2-day workshop provided for the Australian Bureau of Meteorology during 15-16 October 2007. The workshop targets system administrators whose task is to setup a data service for interactive users, batch processes, and high level web services, that will access netcdf, hdf, or freeform data in a file system or SQL data in a database. The workshop provides them with the information they need to install and configure Hyrax along with some background on available clients so they can test their servers and give basic advice to users.

Summary of the slide deck: 

The presentation delves into Data Handlers within the context of the BES (Backend Server) for OPeNDAP systems, elucidating their role as specialized modules adept at parsing data formats and generating DAP2 objects. It outlines the process of obtaining these handlers, whether through binary downloads or building from source, with detailed instructions provided for both methods. Additionally, it elucidates the configuration steps necessary for integrating these handlers into the BES, including modifications to the bes.conf file and setting appropriate parameters. The presentation further covers the restart procedure for Hyrax following configuration changes and offers methods to verify successful implementation. Furthermore, it introduces FreeForm, a tool for serving diverse data formats, providing insights into its usage, format file creation, handling of headers, and additional attributes. The presentation culminates with practical examples and resources for further exploration, enhancing comprehension of Data Handlers and FreeForm within the OPeNDAP ecosystem.
Magnetic State Control of Non-van der Waals 2D Materials by Hydrogenation
Creators: name: Barnowsky, Tom
name: Curtarolo, Stefano
name: Krasheninnikov, Arkady V.
name: Heine, Thomas
name: Friedrich, Rico
Publisher: name: arXiv
Year: 2023
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: Controlling the magnetic state of two-dimensional (2D) materials is crucial for spintronic applications. By employing data-mining and autonomous density functional theory calculations, we demonstrate the switching of magnetic properties of 2D non-van der Waals materials upon hydrogen passivation. The magnetic configurations are tuned to states with flipped and enhanced moments. For 2D CdTiO$_3$ - a nonmagnetic compound in the pristine case - we observe an onset of ferromagnetism upon hydrogenation. Further investigation of the magnetization density of the pristine and passivated systems provides a detailed analysis of modified local spin symmetries and the emergence of ferromagnetism. Our results indicate that selective surface passivation is a powerful tool for tailoring magnetic properties of nanomaterials such as non-vdW 2D compounds.
description: 12 pages, 10 figures
A Renormalization Group Study of Helimagnets in D=2+EPSILON Dimensions
Creators: name: Azaria, P.
name: Delamotte, B.
name: Delduc, F.
name: Jolicoeur, Th.
Publisher: name: arXiv
Year: 1993
Subjects: subject: Condensed Matter (cond-mat)
subject: FOS: Physical sciences

description: We study a non linear sigma model $O(N)\otimes O(2)/O(N-2)\otimes O(2)$ describing the phase transition of N-components helimagnets up to two loop order in $D=2+ε$ dimensions. It is shown that a stable fixed point exists as soon as $N$ is greater than 3 (or equal). In the N=3 case, the symmetry of the system is dynamically enlarged at the fixed point to O(4) We show that the order parameter for Heisenberg helimagnets involves a tensor representation of $O(4)$. We show that for large $N$ and in the neighborhood of two dimensions this nonlinear sigma model describes the same critical theory as the Landau-Ginzburg linear theory. We deduce that there exists a dividing line $N_c (D)$ in the plane $(N, D)$ separating a first-order region containing the Heisenberg point at $D=4$ and a second-order region containing the whole $D=2$ axis. We conclude that the phase transition of Heisenberg helimagnets in dimension 3 is either first order or second order with $O(4)$ exponents involving a tensor representation or tricritical.
description: 25 pages and 1 figure not included, LateX, Saclay preprint SPhT/93-044
Low temperature magnetization of the S=1/2 kagome antiferromagnet ZnCu_3(OH)_6Cl_2
Creators: name: Bert, F.
name: Nakamae, S.
name: Ladieu, F.
name: L'Hôte, D.
name: Bonville, P.
name: Duc, F.
name: Trombe, J. -C.
name: Mendels, P.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The dc-magnetization of the unique S=1/2 kagome antiferromagnet Herbertsmithite has been measured down to 0.1K. No sign of spin freezing is observed in agreement with former muSR and ac-susceptibility results. The low temperature magnetic response is dominated by a defect contribution which exhibits a new energy scale $\simeq 1$ K, likely reflecting the coupling of the defects. The defect component is saturated at low temperature by H>8T applied magnetic fields which enables us to estimate an upper bound for the non saturated intrinsic kagome susceptibility at T=1.7K.
description: to appear in PRB
title: ADCO, Cartulaire général de Cîteaux, dit de Jean de Cirey, (XVe siècle), tome III, Cart. 187 (11 H 72), f. 0039r
Creators: name: de la Côte d'Or, Archives départementales
name: CG21/F.PETOT/2012
name: Petot, Frédéric
name: Archives Départementales De La Côte-D'Or
name: Petot, Frédérique
name: Projet CBMA
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 III, Archives départementales de la Côte-d'Or, Cart. 187 (11 H 72), f. 0039r, 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 III, Archives départementales de la Côte-d'Or, Cart. 187 (11 H 72), f. 0039r, 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
Renormalization-Group Equations of Neutrino Masses and Flavor Mixing Parameters in Matter
Creators: name: Xing, Zhi-zhong
name: Zhou, Shun
name: Zhou, Ye-Ling
Publisher: name: arXiv
Year: 2018
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We borrow the general idea of renormalization-group equations (RGEs) to understand how neutrino masses and flavor mixing parameters evolve when neutrinos propagate in a medium, highlighting a meaningful possibility that the genuine flavor quantities in vacuum can be extrapolated from their matter-corrected counterparts to be measured in some realistic neutrino oscillation experiments. Taking the matter parameter $a \equiv 2\sqrt{2} \ G^{}_{\rm F} N^{}_e E$ to be an arbitrary scale-like variable with $N^{}_e$ being the net electron number density and $E$ being the neutrino beam energy, we derive a complete set of differential equations for the effective neutrino mixing matrix $V$ and the effective neutrino masses $\widetilde{m}^{}_i$ (for $i = 1, 2, 3$). Given the standard parametrization of $V$, the RGEs for $\{\widetildeθ^{}_{12}, \widetildeθ^{}_{13}, \widetildeθ^{}_{23}, \widetildeδ\}$ in matter are formulated for the first time. We demonstrate some useful differential invariants which retain the same form from vacuum to matter, including the well-known Naumov and Toshev relations. The RGEs of the partial $μ$-$τ$ asymmetries, the off-diagonal asymmetries and the sides of unitarity triangles of $V$ are also obtained as a by-product.
description: 22 pages, 8 figures, more discussions added, to be published in JHEP
Educação superior e agenciamento: a constituição singular do professor da educação superior no presente
Creators: name: Pensin, Daniela Pederiva
Publisher: name: figshare
Year: 2018
Subjects: subject: 80706 Librarianship
subject: FOS: Media and communications
subject: Library and Information Studies

description: O texto toma como objeto a constituição do professor da educação superior considerando a complexidade do presente. Ao intentar sua problematização, o faz inspirado nos estudos de orientação foucaultiana, servindo-se do discurso como conceito teórico-metodológico. A busca por este objetivo mobilizou: reconhecer a constituição do professor da educação superior inextrincavelmente articulada à constituição da docência; assentir a constituição histórica e contextualizada deste professor; tomá-la em sua singularidade na invenção de um tipo sujeito específico; dar visibilidade ao que se coloca como verdades sobre este professor por meio dos discursos institucionais. Tomou-se como superfície analítica os Projetos Pedagógicos Institucionais de nove universidades do Rio Grande do Sul e buscou-se pelas recorrências discursivas ─ formas de fazer circular verdades autorizadas que, em meio a jogos de verdade, constituem o professor. Organizado em duas seções, na primeira trata a constituição do professor desde uma perspectiva histórica, que permite ver o professor imerso na atmosfera da educação de seu tempo numa constituição não estática, tampouco linear. A segunda seção traz a compreensão de que o professor, no presente, constitui-se em meio a práticas de uma docência singular, que opera pelo agenciamento. O movimento analítico que sustenta este texto conduz à compreensão de que o professor se constitui, no presente, como um sujeito que opera pelo agenciamento e ao operar mobiliza a ideia de fazer do indivíduo alguém capaz de produzir efeitos, ao menos, em três dimensões: (1) uma dimensão de mercado, (2) uma dimensão de conhecimento e tecnologia, (3) uma dimensão humanizadora.
Leptogenesis in a Left-Right Symmetric Model with double seesaw
Creators: name: Patel, Utkarsh
name: Adarsh, Pratik
name: Patra, Sudhanwa
name: Sahu, Purushottam
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We explore the connection between low-scale CP-violating Dirac phase~$(δ)$ and high-scale leptogenesis in a Left-Right Symmetric Model (LRSM) with scalar bidoublet and doublets. The fermion sector of the model is extended with one sterile neutrino~$(S_L)$ per generation to implement a double seesaw mechanism in the neutral fermion mass matrix. The double seesaw is performed via the implementation of type-I seesaw twice. The first seesaw facilitates the generation of Majorana mass term for heavy right-handed (RH) neutrinos~$(N_R)$, and the light neutrino mass becomes linearly dependent on $S_L$ mass in the second. In our framework, we have taken charge conjugation ($C$) as the discrete left-right (LR) symmetry. This choice assists in deriving the Dirac neutrino mass matrix ($M_D$) in terms of the light and heavy RH neutrino masses and light neutrino mixing matrix $U_{PMNS}$ (containing $δ$). We illustrate the viability of unflavored thermal leptogenesis via the decay of RH neutrinos by using the obtained $M_D$ with the masses of RH neutrinos as input parameters. A complete analysis of the Boltzmann equations describing the asymmetry evolution is performed in the unflavored regime, and it is shown that with or without Majorana phases, the CP-violating Dirac phase is sufficient to produce the required asymmetry in the leptonic sector within this framework for a given choice of input parameters. Finally, we comment on the possibility of constraining our model with the current and near-future oscillation experiments, which are aimed at refining the value of $δ$.
description: 45 pages, 13 figures, 5 Tables
EVOLUZIONE STORICA DELL’EDUCAZIONE DEI SORDI
Creators: name: RUSCIANO, COSIMA
Publisher: name: Studi di glottodidattica
Year: 2011
Subjects: emarginazione; educatori; metodo mimico-gestuale; metodo orale; istruzione

description: Nell’antichità non vi era consapevolezza del legame fra sordità e mutismo.In tutta Europa i sordi non godevano di alcun diritto perché considerati persone conproblemi mentali.Solo con l’avvento dell’ Umanesimo e del concetto di uomo nuovo in cerca di riscatto edignità attraverso la cultura, si constata un effetto benefico anche nel campodell’educazione dei sordi.Le prime notizie sulla loro educazione arrivano dalla Spagna.Padre Ponce de Leon insegnò a leggere, scrivere e far di conto a tre fratelli sordi nobili diCastiglia.De L’Epée Carlo Michele, primo grande educatore dei sordi, adottò il metodo “mimicogestuale”ma non trascurò l’importanza della parola parlata, favorendo lo sviluppointellettivo dei sordi che frequentarono la sua scuola.In Italia, inizialmente, si utilizzò il metodo gestuale grazie all’abate Silvestri che seguì lelinee del metodo de L’Epée: si istruivano gli allievi nell’articolazione, nella lettura labiale,ma con il supporto gestuale come mezzo primario di comunicazione.Successivamente, intorno al 1880, emerge la figura di Filippo Smaldone vero specialistanell'educazione dei sordi, tanto che stese programmi e progetti educativi, linee di metodo edi didattica, esaltando il metodo orale labiale.Alla fine del secolo scorso con le leggi 517/77 e la più recente 104/92 si è avuta una inizialevera e propria integrazione dei sordi nel mondo degli udenti.
description: Studi di glottodidattica, V. 4, N. 1 (2010)
Exploring the Dust Content of Galactic Winds With Herschel. II. Nearby Dwarf Galaxies
Creators: name: McCormick, Alexander
name: Veilleux, Sylvain
name: Meléndez, Marcio
name: Martin, Crystal L.
name: Bland-Hawthorn, Joss
name: Cecil, Gerald
name: Heitsch, Fabian
name: Müller, Thomas
name: Rupke, David S. N.
name: Engelbracht, Chad
Publisher: name: arXiv
Year: 2018
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present the results from an analysis of deep Herschel Space Observatory observations of six nearby dwarf galaxies known to host galactic-scale winds. The superior far-infrared sensitivity and angular resolution of Herschel have allowed detection of cold circumgalactic dust features beyond the stellar components of the host galaxies traced by Spitzer 4.5 $μ$m images. Comparisons of these cold dust features with ancillary data reveal an imperfect spatial correlation with the ionized gas and warm dust wind components. We find that typically $\sim$10-20\% of the total dust mass in these galaxies resides outside of their stellar disks, but this fraction reaches $\sim$60\% in the case of NGC 1569. This galaxy also has the largest metallicity (O/H) deficit in our sample for its stellar mass. Overall, the small number of objects in our sample precludes drawing strong conclusions on the origin of the circumgalactic dust. We detect no statistically significant trends with star formation properties of the host galaxies, as might be expected if the dust were lifted above the disk by energy inputs from on-going star formation activity. Although a case for dust entrained in a galactic wind is seen in NGC 1569, in all cases, we cannot rule out the possibility that some of the circumgalactic dust might be associated instead with gas accreted or removed from the disk by recent galaxy interaction events, or that it is part of the outer gas-rich portion of the disk that lies below the sensitivity limit of the Spitzer 4.5 $μ$m data.
description: 39 pages, 10 figures, Accepted for publication in MNRAS
Deep Imaging of the Double Quasar 0957+561: New Constraints on H_0
Creators: name: Dahle, H.
name: Maddox, S. J.
name: Lilje, Per B.
Publisher: name: arXiv
Year: 1994
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present new results from extremely deep, high-resolution images of the field around the double quasar QSO 0957+561. A possible gravitational arc system near the double quasar has recently been reported, which, if real, would set strong constraints on determinations of the Hubble constant from the time delay in the double quasar. We find that both the morphology and the colors of the claimed arc systems suggest that they are chance alignments of three and two different objects, and not gravitationally lensed arcs. Hence, the constraints on $H_0$-determinations from the arcs are not valid. Also, a small group of galaxies at $z=0.5$ near the line-of-sight which was required to have a very large mass in the physically interesting arc models, is most likely insignificant. From our deep images we are able to use weak lensing of faint background galaxies in the field to map the gravitational potential in the main cluster. This sets new constraints on determinations of $H_0$. We find that the Hubble constant is constrained to be less than 70km/(s Mpc), if the time delay between the two images of the QSO is equal to or larger than 1.1 years.
description: (uuencoded and compressed postscipt including 3 figures); 14 pages
La estética de la accesibilidad en el teatro
Creators: name: Martínez Mier, Lorena
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 360499
subject: Performing arts not elsewhere classified
classificationCode: 420318
subject: People with disability

description: Como trabajo de fin de master realicé una investigación sobre la estética de la accesibilidad, aunque se centra en procesos creativos y de accesibilidad se menciona también como estos se relacionan con los derechos culturales de las PcD y la justicia social, su activismo y movimientos de lucha.
Low energy properties of the SU(m|n) supersymmetric Haldane-Shastry spin chain
Creators: name: Basu-Mallick, B.
name: Bondyopadhaya, Nilanjan
name: Sen, Diptiman
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: The ground state and low energy excitations of the SU(m|n) supersymmetric Haldane-Shastry spin chain are analyzed. In the thermodynamic limit, it is found that the ground state degeneracy is finite only for the SU(m|0) and SU(m|1) spin chains, while the dispersion relation for the low energy and low momentum excitations is linear for all values of m and n. We show that the low energy excitations of the SU(m|1) spin chain are described by a conformal field theory of m non-interacting Dirac fermions which have only positive energies; the central charge of this theory is m/2. Finally, for n \ge 1, the partition functions of the SU(m|n) Haldane-Shastry spin chain and the SU(m|n) Polychronakos spin chain are shown to be related in a simple way in the thermodynamic limit at low temperatures.
description: 40 pages including 2 figures; added some references; this version will appear in Nuclear Physics B
Topological two-band electron-hole superconductors with $d$-wave symmetry: Absence of Dirac quasiparticle annihilation in magic-angle twisted trilayer graphene
Creators: name: Van Loon, Senne
name: de Melo, Carlos A. R. Sa
Publisher: name: arXiv
Year: 2023
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We discuss a two-band model for two-dimensional superconductors with electron and hole bands separated by an energy gap and singlet $d$-wave pairing in each band. This type of model exhibits a V-shaped to U-shaped transition in the density of the states of the superconductor, and was phenomenologically used as a possible interpretation of recent tunneling experiments in magic-angle twisted trilayer graphene (MATTG)~[Kim {\it et al.}, Nature {\bf 606}, 494-500 (2022)]. Performing a microscopic investigation, we find that such a qualitative difference in behavior occurs when the electron and hole chemical potentials change, leading to topological quantum phase transitions (TQPTs) between gapless and gapped $d$-wave superconducting states, due to the annihilation of chiral Dirac fermions at the phase boundaries. This transition requires the vanishing of the coherence peaks in the density of states at zero energy when the phase boundary is crossed, but this is not seen in the experimental data of Kim {\it et al.} (2022). We also show that direct thermodynamic signatures of these topological quantum phase transitions arise in the theoretical compressibility, which exhibits logarithmic singularities at the transition points. Measurements of the compressibility may illuminate the interpretation of the experimental data of Kim {\it et al.} (2022) and provide additional information about topological quantum phase transitions in the superconducting state of MATTG. Based on our analysis, we are led to conclude that the V-shaped to U-shaped transition observed is not related to annihilation of Dirac fermion quasiparticles and its associated TQPTs, but is possibly connected to a change in symmetry of the order parameter from a nodal to a non-nodal superconducting phase.
description: 6 pages, 4 figures
Indicadores de internacionalização: o que os Rankings Acadêmicos medem?
Creators: name: Leal, Fernanda Geremias
name: Stallivieri, Luciane
name: Moraes, Mário César Barreto
Publisher: name: figshare
Year: 2018
Subjects: subject: 80706 Librarianship
subject: FOS: Media and communications
subject: Library and Information Studies

description: Um dos aspectos que reflete a importância da internacionalização da educação superior no contextocontemporâneo é criação de rankings acadêmicos globais e a inclusão de indicadores de internacionalização nessas ferramentas, que têm influenciado significativamente as políticas universitárias e governamentais. A despeito do prestigiado status adquirido pelos rankings, seus indicadores ainda refletem certa obscuridade e, nesse sentido, suscitam debates sobre sua capacidade de mensurar qualidade educacional. Diante desse cenário,o objetivo deste artigo é analisar os principais rankings acadêmicos internacionais e nacionais, com foco nosindicadores relacionados à internacionalização da educação superior. A pesquisa internacional, na forma de publicação, constitui-se como o indicador de internacionalização mais significativo para os rankings investigados, em parte devido a seu caráter quantitativo, que viabiliza a análise transnacional. Na ausência de análises qualitativas e contextualizadas, com indicadores e pesos adotados segundo justificações teóricas, os rankings acabam não contemplando a totalidade dos objetivos e missões que permeiam as universidades ao redor do mundo, e tampouco a complexidade inerente ao conceito de internacionalização da educação superior.
Counterfactual Learning on Graphs: A Survey
Creators: name: Guo, Zhimeng
name: Xiao, Teng
name: Wu, Zongyu
name: Aggarwal, Charu
name: Liu, Hui
name: Wang, Suhang
Publisher: name: arXiv
Year: 2023
Subjects: subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Graph-structured data are pervasive in the real-world such as social networks, molecular graphs and transaction networks. Graph neural networks (GNNs) have achieved great success in representation learning on graphs, facilitating various downstream tasks. However, GNNs have several drawbacks such as lacking interpretability, can easily inherit the bias of data and cannot model casual relations. Recently, counterfactual learning on graphs has shown promising results in alleviating these drawbacks. Various approaches have been proposed for counterfactual fairness, explainability, link prediction and other applications on graphs. To facilitate the development of this promising direction, in this survey, we categorize and comprehensively review papers on graph counterfactual learning. We divide existing methods into four categories based on problems studied. For each category, we provide background and motivating examples, a general framework summarizing existing works and a detailed review of these works. We point out promising future research directions at the intersection of graph-structured data, counterfactual learning, and real-world applications. To offer a comprehensive view of resources for future studies, we compile a collection of open-source implementations, public datasets, and commonly-used evaluation metrics. This survey aims to serve as a ``one-stop-shop'' for building a unified understanding of graph counterfactual learning categories and current resources. We also maintain a repository for papers and resources and will keep updating the repository https://github.com/TimeLovercc/Awesome-Graph-Causal-Learning.
LA L.I.S. COME STRATEGIA DI APPRENDIMENTO
Creators: name: SANSONNA, LOREDANA
Publisher: name: Studi di glottodidattica
Year: 2011
Subjects: LIS; apprendimento; famiglia; figure professionali

description: La tesi propone un lavoro di ricerca, sull’importanza di una strategia diapprendimento nei soggetti non udenti.Inizialmente propone cenni storici sulla sordità , al fine di sottolineare le difficoltà cheda sempre hanno dovuto affrontare le persone con questo deficit. Quanto la cultura udentesi sia imposta su di loro, perdendo di vista la persona , l’individuo , soffocando la loroidentità.La seconda parte si concentra sull’apprendimento, come si sviluppa in un soggettosordo, quali sono le strategie migliori e il ruolo della L.I.S.Infine si pone attenzione alle figure professionali, che cooperano nel processo diapprendimento come : l’educatore sordo, l’assistente alla comunicazione, l’interprete.
description: Studi di glottodidattica, V. 4, N. 1 (2010)
INFORMAÇÃO AMBIENTAL NO SÉCULO XXI
Creators: name: Edmeire Cristina Pereira
name: Freitas, Maria Do Carmo Duarte
Publisher: name: figshare
Year: 2018
Subjects: Uncategorized

description: Trata-se de uma pequena obra de referência, na forma de coletânea de textos ligados ao Meio Ambiente e Sustentabilidade, produzidos a partir de mini-textos redigidos pela Profa. Edmeire C. Pereira, em 2012, quando da RIO +20, no Rio de Janeiro, e por ocasião de lecionar uma disciplina optativa de Tópicos em Gestão da Informação, para o Curso de Gestão da Informação, e cuja ênfase foi direcionada para os temas do Desenvolvimento Sustentável e Educação para a Sustentabilidade, como temas de interesse transversal na formação dos Gestores de Informação formados pela UFPR.
Machine-learning techniques for fast and accurate feature localization in holograms of colloidal particles
Creators: name: Hannel, Mark D.
name: Abdulali, Aidan
name: O'Brien, Michael
name: Grier, David G.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Holograms of colloidal particles can be analyzed with the Lorenz-Mie theory of light scattering to measure individual particles' three-dimensional positions with nanometer precision while simultaneously estimating their sizes and refractive indexes. Extracting this wealth of information begins by detecting and localizing features of interest within individual holograms. Conventionally approached with heuristic algorithms, this image analysis problem can be solved faster and more generally with machine-learning techniques. We demonstrate that two popular machine-learning algorithms, cascade classifiers and deep convolutional neural networks (CNN), can solve the feature-localization problem orders of magnitude faster than current state-of-the-art techniques. Our CNN implementation localizes holographic features precisely enough to bootstrap more detailed analyses based on the Lorenz-Mie theory of light scattering. The wavelet-based Haar cascade proves to be less precise, but is so computationally efficient that it creates new opportunities for applications that emphasize speed and low cost. We demonstrate its use as a real-time targeting system for holographic optical trapping.
description: 8 pages, 4 figures
Mode solutions for a Klein-Gordon field in anti-de Sitter spacetime with dynamical boundary conditions of Wentzell type
Creators: name: Dappiaggi, Claudio
name: Ferreira, Hugo R. C.
name: Juárez-Aubry, Benito A.
Publisher: name: arXiv
Year: 2018
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We study a real, massive Klein-Gordon field in the Poincaré fundamental domain of the $(d+1)$-dimensional anti-de Sitter (AdS) spacetime, subject to a particular choice of dynamical boundary conditions of generalized Wentzell type, whereby the boundary data solves a non-homogeneous, boundary Klein-Gordon equation, with the source term fixed by the normal derivative of the scalar field at the boundary. This naturally defines a field in the conformal boundary of the Poincaré fundamental domain of AdS. We completely solve the equations for the bulk and boundary fields and investigate the existence of bound state solutions, motivated by the analogous problem with Robin boundary conditions, which are recovered as a limiting case. Finally, we argue that both Robin and generalized Wentzell boundary conditions are distinguished in the sense that they are invariant under the action of the isometry group of the AdS conformal boundary, a condition which ensures in addition that the total flux of energy across the boundary vanishes.
description: 12 pages, 1 figure. In V3: refs. added, introduction and conclusions expanded
Dark Energy as a Critical Period in Binary Motion: Bounds from Multi-scale Binaries
Creators: name: Benisty, David
name: Wagner, Jenny
name: Staicova, Denitsa
Publisher: name: arXiv
Year: 2023
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The two-body problem under the influence of both dark energy and post-Newtonian modifications is studied. In this unified framework, we demonstrate that dark energy plays the role of a critical period with $T_Λ = 2π/c \sqrtΛ \approx 60~\text{Gyr}$. We also show that the ratio between orbital and critical period naturally emerges from the Kretschmann scalar, which is a quadratic curvature invariant characterizing all binary systems effectively represented by a de Sitter-Schwarzschild spacetime. The suitability of a binary system to constrain dark energy is determined by the ratio between its Keplerian orbital period $T_\text{K}$ and the critical period $T_Λ$. Systems with $T_\text{K} \approx T_Λ$ are optimal for constraining the cosmological constant $Λ$, such as the Local Group and the Virgo Cluster. Systems with $T_{\text{K}} \ll T_Λ$ are dominated by attractive gravity (which are best suited for studying modified gravity corrections). Systems with $T_{\text{K}} \gg T_Λ$ are dominated by repulsive dark energy and can thus be used to constrain $Λ$ from below. We use our unified framework of post-Newtonian and dark-energy modifications to calculate the precession of bounded and unbounded astrophysical systems and infer constraints on $Λ$ from them. Pulsars, the solar system, S stars around Sgr A*, the Local Group, and the Virgo Cluster, having orbital periods of days to gigayears, are analyzed. The results reveal that the upper bound on the cosmological constant decreases when the orbital period of the system increases, emphasizing that $Λ$ is a critical period in binary motion.
description: Accepted in Astronomy and Astrophysics
Supplement Figure 1: Where are the people in people-centered health systems? Population assessment of health system performance in 16 countries
Creators: name: Sabwa, Shalom
name: E. Kruk, Margaret
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 420311
subject: Health systems

description: This is the appendix figure 1 for the WHO Bulletin submission from Kruk et al.: "Where are the people in people-centered health systems? Population assessment of health system performance in 16 countries (health systems theme issue)".
title: 01_1923
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/
Linear Potentials and Galactic Rotation Curves
Creators: name: Mannheim, Philip D.
Publisher: name: arXiv
Year: 1992
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We derive a simple, closed form expression for the potential of a thin exponential disk of stars interacting through gravitational potentials of the form $V(r)=-β/r+γr/2$, the potential associated with fundamental sources in the fourth order conformal invariant theory of gravity which has recently been advanced by Mannheim and Kazanas as a candidate alternative to the standard second order Einstein theory. Using the model, we obtain a reasonable fit (flat to within $\pm3\%$) to the (prototypical) NGC3198 $HI$ rotation curve data without the need for any non-luminous or dark matter. Our study suggests that th observed flatness of rotation curves may only be an intermediate phenomenon, and an asymptotic one.
description: 13 pages (1 figure requestable), UCONN-92-3
Vacuum birefringence and the X-ray polarization from black-hole accretion disks
Creators: name: Caiazzo, Ilaria
name: Heyl, Jeremy
Publisher: name: arXiv
Year: 2018
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: In the next decade, x-ray polarimetry will open a new window on the high-energy Universe, as several missions that include an x-ray polarimeter are currently under development. Observations of the polarization of x-rays coming from the accretion disks of stellar-mass and supermassive black holes are among the new polarimeters' major objectives. In this paper, we show that these observations can be affected by the quantum electrodynamic (QED) effect of vacuum birefringence: after an x-ray photon is emitted from the accretion disk, its polarization changes as the photon travels through the accretion disk's magnetosphere, as a result of the vacuum becoming birefringent in presence of a magnetic field. We show that this effect can be important for black holes in the energy band of the upcoming polarimeters, and has to be taken into account in a complete model of the x-ray polarization that we expect to detect from black-hole accretion disks, both for stellar mass and for supermassive black holes. We find that, for a chaotic magnetic field in the disk, QED can significantly decrease the linear polarization fraction of edge-on photons, depending on the spin of the hole and on the strength of the magnetic field. This effect can provide, for the first time, a direct way to probe the magnetic field strength close to the innermost stable orbit of black-hole accretion disks and to study the role of magnetic fields in astrophysical accretion in general.
description: 11 pages, 3 figures
Parameter degeneracy in models of the quadruple lens system Q2237+0305
Creators: name: Wambsganss, Joachim
name: Paczynski, Bohdan
Publisher: name: arXiv
Year: 1994
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The geometry of the quadruple lens system Q2237+0305 is modeled with a simple astigmatic lens: a power-law mass distribution: m \propto r^βwith an external shear γ. The image positions can be reproduced with an accuracy better than 0.01 arcsec for any 0.0 < β< 1.85 and the corresponding value of γ= 0.1385 - 0.0689 β. This is a factor of about 4 more precise than what can be achieved by the best constant M/L lens models. The image intensity ratios and the time delay ratios are almost constant along our one parameter family of models, but the total magnification varies from 8 to > 1000, and the maximum time delay (between leading image B and trailing image C) for H_0 of 75 km/sec/Mpc varies from more than 20 hours to about 1.5 hours, while βincreases from 0.0 to 1.85.
description: 15 pages uuencoded compressed postscript text plus 4 postscript figures; MPI Astrophysik report MPA-821; to appear in Astronomical Journal
The Electromagnetic Interactions of Electrons in the Lowest Landau Level
Creators: name: Ray, Rashmi
name: Sakita, B.
Publisher: name: arXiv
Year: 1993
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Condensed Matter (cond-mat)
subject: FOS: Physical sciences

description: Starting from a system of planar electrons in a strong magnetic field normal to the plane, interacting with perturbing electromagnetic fields, an effective Lagrangian for the fermions in the lowest Landau level (L.L.L.) has been derived. By choosing a suitable background electrostatic potential, an incompressible droplet of these electrons is constructed. The gauge invariant effective Lagrangian for the electrons in the L.L.L. is shown to split naturally into a $1+1$ dimensional Lagrangian for the electrons on the surface of the droplet and into a $2+1$ dimensional gauge-field Lagrangian representing the contribution of the interior of the droplet. Upon bosonization, the former represents the surface vibrations of the droplet. Individually neither of these two actions is gauge invariant, but it is shown that the gauge dependence from the two pieces cancels out. This demonstrates that the edge degrees of freedom are essential for maintaining gauge invariance.
description: 17 pages, Plain tex, CCNY-HEP-93/1
LE COMPONENTI NON MANUALI (CNM) DELLA LIS
Creators: name: SCELZI, RAFFAELLA
Publisher: name: Studi di glottodidattica
Year: 2011
Subjects: microespressioni facciali; emozione; componenti non manuali (CNM); espressioni idiomatiche; dialogo tonico LIS

description: La duplice natura umana divisa tra un’identità interna ed un’esterioritàpalesata in un “corpo”, induce a riflettere sul termine che racchiude in sé ilconcetto di forma e contenuto, riflesso dell’interiorità ed esplicitazione diun’emozione.La LIS, Lingua Italiana dei Segni, lingua naturale, veicola i suoisignificati con tutto il corpo e con le Componenti Non Manuali, CNM, chesvolgono un ruolo determinante a livello morfosintattico, lessicale e flessivo edin alcune espressioni idiomatiche abbinandosegno+CNM+COS+IPP+vocalizzazione e/o inizializzazione ed espressionefacciale. La LIS è una lingua verbale, tridimensionale, non orale, non vocaleche usa il canale visivo-gestuale e i movimenti di corpo e mani nello spazio. Ilviso e le microespressioni facciali osservate e codificate in UA nelle “FACS”dagli studiosi Ekman e Friesen veicolano significati a livello morfologico,sintattico e semantico fortemente correlati all’influenza che l’emozioneapporta durante la comunicazione. La prospettiva nel guardare il mondo disolito è di tipo orizzontale, vediamo solo chi ci è di fronte. Dovremmo adottareuna prospettiva verticale e vedere il mondo in ogni sua parte. L’Assistente allaComunicazione (AC) ha il precipuo compito di estrapolare dall’alunno sordo ilvalore unico, cambiare prospettiva entrando in empatia con l’altro, progettarequalcosa e attuarlo grazie al ruolo di “ponte” che da sempre la distingue, trasoggetti interagenti in LIS.
description: Studi di glottodidattica, V. 4, N. 1 (2010)
Instability of stationary solutions for double power nonlinear Schrödinger equations in one dimension
Creators: name: Fukaya, Noriyoshi
name: Hayashi, Masayuki
Publisher: name: arXiv
Year: 2023
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: We consider a double power nonlinear Schrödinger equation which possesses the algebraically decaying stationary solution $ϕ_0$ as well as exponentially decaying standing waves $e^{iωt}ϕ_ω(x)$ with $ω>0$. It is well-known from the general theory that stability properties of standing waves are determined by the derivative of $ω\mapsto M(ω):=\frac{1}{2}\|ϕ_ω\|_{L^2}^2$; namely $e^{iωt}ϕ_ω$ with $ω>0$ is stable if $M'(ω)>0$ and unstable if $M'(ω)<0$. However, the stability/instability of stationary solutions is outside the general theory from the viewpoint of spectral properties of linearized operators. In this paper we prove the instability of the stationary solution $ϕ_0$ in one dimension under the condition $M'(0):=\lim_{ω\downarrow 0}M'(ω)\in[-\infty, 0)$. The key in the proof is the construction of the one-sided derivative of $ω\mapstoϕ_ω$ at $ω=0$, which is effectively used to construct the unstable direction of $ϕ_0$.
description: 26 pages, 2 figures, final version
Horospherical stacks and stacky coloured fans
Creators: name: Monahan, Sean
Publisher: name: arXiv
Year: 2023
Subjects: subject: Algebraic Geometry (math.AG)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 14A20 (Primary) 14M27, 14L30, 05E14 (Secondary)

description: We introduce a combinatorial theory of horospherical stacks which is motivated by the work of Geraschenko and Satriano on toric stacks. A horospherical stack corresponds to a combinatorial object called a stacky coloured fan. We give many concrete examples, including a class of easy-to-draw examples called coloured fantastacks. The main results in this paper are combinatorial descriptions of horospherical stacks, the morphisms between them, their decolourations, and their good moduli spaces.
description: 48 pages. Published: "Transactions of the American Mathematical Society"
DARE LA COMUNICAZIONE AL SORDO E’ POSSIBILE
Creators: name: SOARDI, MARIA
Publisher: name: Studi di glottodidattica
Year: 2011
Subjects: comunicazione verbale e non verbale; comunicazione assertiva; competenza comunicativa e linguistica

description: In un mondo fatto a misura di udenti è ammirevole vedere che esistono persone cheutilizzano altre risorse sensoriali per sopperire a quella deficitaria di tipo uditivo.1. La capacità comunicativa che i sordi sono riusciti ad ottenere con intensi sforzi, siaper far valere i propri diritti al pari degli udenti, sia per creare un codice comune dicomunicazione quale la lingua dei segni, ha portato molte persone normoudenti adavvicinarsi ad un mondo particolarmente difficile ed affascinante che è in continuaevoluzione.Entrare nella realtà dei sordi però, significa anche essere informati sulle cause edifficoltà che le persone con un deficit uditivo, affrontano quotidianamente. Partire da cos’èla comunicazione, conoscerla nelle varie forme, verbali e non verbali, porsi con assertività inqualsiasi contesto,saper valutare i metodi didattici più appropriati: questo sarà il ruolo delmediatore linguistico che si porrà come “ponte” tra i sordi e la realtà che li circonda.
description: Studi di glottodidattica, V. 4, N. 1 (2010)
Maxwell's equations with hypersingularities at a negative index material conical tip
Creators: name: Dhia, Anne-Sophie Bonnet-Ben
name: Chesnel, Lucas
name: Rihani, Mahran
Publisher: name: arXiv
Year: 2023
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: We study a transmission problem for the time harmonic Maxwell's equations between a classical positive material and a so-called negative index material in which both the permittivity $\varepsilon$ and the permeability $μ$ take negative values. Additionally, we assume that the interface between the two domains is smooth everywhere except at a point where it coincides locally with a conical tip. In this context, it is known that for certain critical values of the contrasts in $\varepsilon$ and in $μ$, the corresponding scalar operators are not of Fredholm type in the usual $H^1$ spaces. In this work, we show that in these situations, the Maxwell's equations are not well-posed in the classical $L^2$ framework due to existence of hypersingular fields which are of infinite energy at the tip. By combining the $\mathrm{T}$-coercivity approach and the Kondratiev theory, we explain how to construct new functional frameworks to recover well-posedness of the Maxwell's problem. We also explain how to select the setting which is consistent with the limiting absorption principle. From a technical point of view, the fields as well as their curls decompose as the sum of an explicit singular part, related to the black hole singularities of the scalar operators, and a smooth part belonging to some weighted spaces. The analysis we propose rely in particular on the proof of new key results of scalar and vector potential representations of singular fields.
Experimental characterization of thermionic surface cooling in thermionic discharge
Creators: name: Bak, Junhwi
name: Tropina, Albina
name: Creel, James
name: Miles, Richard B.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: In this work, the thermionic cooling effect during thermionic discharges with parallel plate electrodes at 1 Torr is investigated. Time-resolved observation of electron emission and surface temperature is realized in addition to the typical steady state characterization. Surface cooling by the electron emission, initiated by plasma ignition, is directly captured at its onset and an estimated cooling capacity of 1.6 \pm 0.2 MW/m^2 is observed. The present work provides experimental evidence of considerable surface cooling achieved by thermionic cooling. This result indicates that thermionic cooling can be a promising thermal protection method at elevated temperatures, such as those encountered by hypersonic vehicle leading edges in flight.
description: 14 pages, 21 figures. Submitted on 17 September 2022