cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Handling jets + missing E_T channel using inclusive mT2
Creators: name: Nojiri, Mihoko M.
name: Sakurai, Kazuki
name: Shimizu, Yasuhiro
name: Takeuchi, Michihisa
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The ATLAS and CMS experiments at the Large Hadron Collider (LHC) may discover the squarks (\tilde{q}) and gluino (\tilde{g}) of the minimal supersymmetric standard model (MSSM) in the early stage of the experiments if their masses are lighter than 1.5 TeV. In this paper we propose the sub-system m_{T2} variable, which is sensitive to the gluino mass when m_{\tilde{q}}>m_{\tilde{g}}. Using it with the inclusive m_{T2} distribution proposed earlier, \tilde{q} and \tilde{g} masses can be determined simultaneously in the early stage of the experiments. Results of Monte Carlo simulations at sample MSSM model points are presented both for signal and background.
description: Some typos are fixed and references are updated
Improving Channel Charting using a Split Triplet Loss and an Inertial Regularizer
Creators: name: Rappaport, Brian
name: Gönültaş, Emre
name: Hoydis, Jakob
name: Arnold, Maximilian
name: Srinath, Pavan Koteshwar
name: Studer, Christoph
Publisher: name: arXiv
Year: 2021
Subjects: subject: Signal Processing (eess.SP)
subject: Information Theory (cs.IT)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: Channel charting is an emerging technology that enables self-supervised pseudo-localization of user equipments by performing dimensionality reduction on large channel-state information (CSI) databases that are passively collected at infrastructure base stations or access points. In this paper, we introduce a new dimensionality reduction method specifically designed for channel charting using a novel split triplet loss, which utilizes physical information available during the CSI acquisition process. In addition, we propose a novel regularizer that exploits the physical concept of inertia, which significantly improves the quality of the learned channel charts. We provide an experimental verification of our methods using synthetic and real-world measured CSI datasets, and we demonstrate that our methods are able to outperform the state-of-the-art in channel charting based on the triplet loss.
description: 6 pages, 2 figures
Diseño de un espectrofotómetro UV-VIS de bajo costo para la industria bioquímica: Una Revisión
Creators: name: Camacho, Francisco Jacob Avila
name: Moreno-Villalba, Leonardo Miguel
name: Cerón-Montes, Genaro Iván
name: Garrido-Hernández, Aristeo
name: Cardoso-Chávez, Cesar Andrés
name: Pacheco-Piña, Carlos Jossef
Publisher: name: arXiv
Year: 2022
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: The spectrophotometry systems commonly required both in research areas and in the chemical and materials industries turn out to be expensive laboratory equipment, in many cases the acquisition of these becomes unfeasible; besides, in several applications portability is also required to perform measurements in the field and that they could be broad spectrum devices. In this work, a review of various development projects for spectrophotometry devices was carried out, ranging from academic prototypes to industrial products using different implementation strategies in order to know the feasibility of creating portable and broad-spectrum devices or specific products for a particular sector, but with the intention of achieving high precision and functionality. The research allowed to conclude with a novel contribution for the development of powerful spectrophotometry prototypes for specific, low-cost industries or sectors.
description: in Spanish language
Sparse Reconstruction of Chirplets for Automotive FMCW Radar Interference Mitigation
Creators: name: Correas-Serrano, Aitor
name: González-Huici, María A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Signal Processing (eess.SP)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Mutual interference in automotive radar scenarios is going to become a major concern as the density of vehicles with radar sensors in the roads increases. The present work tackles the problem of frequency modulated continuous wave (FMCW) to FMCW and continuous wave interference. In this context, we propose a signal processing technique to blindly identify and remove interference by using the fast Orthogonal Matching Pursuit (OMP) algorithm to project the interference signals in a reduced chirplet basis, and separate it from the target signal with minimal loss of information. Significant reduction of the noise-plus-interference levels are observed in both simulated and measured data, the later acquired with state of the art automotive sensors.
OPERAS SIG on Tools for Open Scholarly Communication: White Paper 2021
Creators: name: Barthonnat, Céline
name: Blotière, Emilie
name: Gingold, Arnaud
name: Mas, François-Xavier
name: Stanić, Nikola
name: Pierno, Alessandro
name: Szulińska, Agnieszka
name: Armando, Lorenzo
name: Pochet, Bernard
name: de Santis, Luca
name: MacGregor, James
name: Pozzo, Riccardo
name: Pogačnik, Aleš
Publisher: name: Zenodo
Year: 2021
Subjects: OPERAS
open scholarly communication
tools
authoring
open peer review
development

description: This white paper is the output of the OPERAS Special Interest Group (SIG) Tools Research and Development for scholarly communication; it is an updated version of a previous 2018 white paper. With a focus on scholarly publishing tools, the objectives of the SIG Tools are to: provide a landscape analysis, identify emerging trends, and list the areas of potential improvements, developments, and collaborations. Since 2018, various studies and initiatives confirmed the necessity to both coordinate the developments of tools and provide guidance to the users. Similarly, OPERAS emphasizes the importance of building the open science scholarly communication infrastructure in Social Sciences and Humanities on community driven tools. The white paper brings information on the existing tools for scholarly publishing, as well as recommendations that will support the building of such an open scholarly communication infrastructure. The paper first examines tools types, definitions, and criteria that are able to facilitate their description and selection. The tools are then analyzed according to publishing main functions. For authoring, the development of online and collaborative tools represents an interesting perspective, especially when relying on structured formats, but also increases the risk of lock-in within multi-functional proprietary services. In peer reviewing, alongside widely used commercial tools, open peer review represents an innovative area, both in terms of usage and tools. Open source tools for publishing already offer a high level of service, but face interoperability challenges with the integration of an increasing variety of third-party services. A specific section is dedicated to communicating tools allowing for comments and annotations, as such function is transversal to the others. To complement this description, the SIG tools also identified major trends that should impact the future of scholarly communication, namely: preprint servers, artificial intelligence, data papers, and user-centric developments. In conclusion, the white paper provides a list of recommendations able to address the challenges identified and to provide building blocks for the envisioned open scholarly infrastructure. The recommendations suggest: to establish user-centric criteria for tools, a tools’ observatory, a set of training materials, guidelines about publishing workflows, and collaborations with other community initiatives.
Multi-Dataset Benchmarks for Masked Identification using Contrastive Representation Learning
Creators: name: Seneviratne, Sachith
name: Kasthuriaarachchi, Nuran
name: Rasnayaka, Sanka
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Image and Video Processing (eess.IV)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: The COVID-19 pandemic has drastically changed accepted norms globally. Within the past year, masks have been used as a public health response to limit the spread of the virus. This sudden change has rendered many face recognition based access control, authentication and surveillance systems ineffective. Official documents such as passports, driving license and national identity cards are enrolled with fully uncovered face images. However, in the current global situation, face matching systems should be able to match these reference images with masked face images. As an example, in an airport or security checkpoint it is safer to match the unmasked image of the identifying document to the masked person rather than asking them to remove the mask. We find that current facial recognition techniques are not robust to this form of occlusion. To address this unique requirement presented due to the current circumstance, we propose a set of re-purposed datasets and a benchmark for researchers to use. We also propose a contrastive visual representation learning based pre-training workflow which is specialized to masked vs unmasked face matching. We ensure that our method learns robust features to differentiate people across varying data collection scenarios. We achieve this by training over many different datasets and validating our result by testing on various holdout datasets. The specialized weights trained by our method outperform standard face recognition features for masked to unmasked face matching. We believe the provided synthetic mask generating code, our novel training approach and the trained weights from the masked face models will help in adopting existing face recognition systems to operate in the current global environment. We open-source all contributions for broader use by the research community.
PORTAFOLIO DOCENTE "A"
Creators: name: Estudiantes Sexto Semestre
Publisher: name: Zenodo
Year: 2021
Subjects: perinatología
neonatología

description: Portafolio docente elaborado por los estudiantes.
description: {"references": ["Vasco-Morales, S., Vasco-Toapanta, C. S., & Toapanta-Pinta, P. C. (2021). Caracter\u00edsticas cl\u00ednicas, radiol\u00f3gicas y de laboratorio en pacientes pedi\u00e1tricos con COVID-19: Revisi\u00f3n sistem\u00e1tica viva.\u00a0Revista de la Facultad de Medicina,\u00a069(1).", "USO, I. Y. Inmunoglobulina Rho (D)(humana) RhoGAM\u00ae Ultra-Filtered PLUS (300 \u00b5g)(1500 UI) MICRhoGAM\u00ae Ultra-Filtered PLUS (50 \u00b5g)(250 UI).", "da Silva, P., De Mar\u00eda, M., Borbonet, D., Bravo, A., & Cede\u00f1o, E. (2018). Manejo perinatal de la hidropes\u00eda fetal.\u00a0Rev Latin Perinat,\u00a021(2), 102-106.", "Sola, A., Maksimovic, L., Bueno, M. M., Rodr\u00edguez, S., Cardetti, M., Golombek, S. G., & Morgues, M. (2020). Sociedad Iberoamericana de Neonatolog\u00eda y COVID-19 perinatal: Informaci\u00f3n y recomendaciones de SIBEN.\u00a0EDISIBEN.", "Mart\u00ednez Ver\u00f3nica, R., L\u00f3pez Gallo, L., Rodr\u00edguez Medina, D., Torre Guti\u00e9rrez, M. D. L., Soto Mancilla, J. L., M\u00e1rquez Amezcua, M., ... & Guti\u00e9rrez Padilla, J. A. (2011). Transporte neonatal seguro en la poblaci\u00f3n abierta del estado de Jalisco: impacto del programa STABLE en la morbilidad y mortalidad.\u00a0Bolet\u00edn m\u00e9dico del Hospital Infantil de M\u00e9xico,\u00a068(1), 34-39.", "Toapanta-Pinta, Paola, et al. \"Factores perinatales asociados a macrosom\u00eda fetal, en un hospital de Quito-Ecuador: Factores perinatais associados \u00e0 macrossomia fetal num hospital em Quito, Equador.\"\u00a0South Florida Journal of Development\u00a02.4 (2021): 4945-4955.", "Morales, S. V., Tasiguano, A. H., Rodriguez, M. E. A., & Pinta, P. T. (2018). Factores de riesgo para reci\u00e9n nacidos con Apgar bajo.\u00a0Computing,\u00a03(5).", "Morales, S. V., Tasiguano, A. E. H., J\u00e1come, C. A. V., & Pinta, P. C. T. (2020). Estudio predictivo de los factores de riesgo perinatales relacionados con alteraciones en el neurodesarrollo.\u00a0Brazilian Journal of Development,\u00a06(9), 67931-67940."]}
Are the Better Educated Less Likely to Support Militancy and Terrorism? Women Are
Creators: name: Afzal, Madiha
Publisher: name: Digital Repository at the University of Maryland
Year: 2012
Subjects: educated
women
terrorism

description: I use 2009 public opinion survey data from Pakistan to show that the relationship between education and support for terrorism varies by gender. Specifically: 1) as women become more educated, they are less likely to support militancy relative to similarly educated men, whereas uneducated women are more likely to support militancy relative to uneducated men, controlling for religiosity, demographics, region, and terrorist events in the district; 2) the effect of women’s education is driven by the years of schooling immediately preceding and following high school; 3) educated women have more negative views of the United States and are more likely to support terror attacks against the U.S. relative to educated men, and uneducated women have more positive views of the United States relative to uneducated men. I discuss possible omitted factors which could explain the results, and use the Altonji Elder Taber test to show that a causal explanation is plausible.
A Deep Survey of the Fornax dSph I: Star Formation History
Creators: name: Coleman, Matthew G.
name: de Jong, Jelte T. A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Based on a deep imaging survey, we present the first homogeneous star formation history (SFH) of the Fornax dwarf spheroidal (dSph) galaxy. We have obtained two-filter photometry to a depth of B ~ 23 over the entire surface of Fornax, the brightest dSph associated with the Milky Way, and derived its SFH using a CMD-fitting technique. We show that Fornax has produced the most complex star formation and chemical enrichment histories of all the Milky Way dSphs. This system has supported multiple epochs of star formation. A significant number of stars were formed in the early Universe, however the most dominant population are the intermediate age stars. This includes a strong burst of star formation approximately 3 to 4 Gyr ago. Significant population gradients are also evident. Similar to other dSphs, we have found that recent star formation was concentrated towards the centre of the system. Furthermore, we show that the central region harboured a faster rate of chemical enrichment than the outer parts of Fornax. At the centre, the ancient stars (age > 10 Gyr) display a mean metallicity of [Fe/H] ~ -1.4, with evidence for three peaks in the metallicity distribution. Overall, enrichment in Fornax has been highly efficient: the most recent star formation burst has produced stars with close to solar metallicity. Our results support a scenario in which Fornax experienced an early phase of rapid chemical enrichment producing a wide range of abundances. Star formation gradually decreased until ~4 Gyr ago, when Fornax experienced a sudden burst of strong star formation activity accompanied by substantial chemical enrichment. Weaker star forming events followed, and we have found tentative evidence for stars with ages less than 100 Myr.
description: 13 pages, 13 figures, accepted for publication in ApJ
Elastic theory of low-dimensional continua and its applications in bio- and nano-structures
Creators: name: Tu, Z. C.
name: Ou-Yang, Z. C.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Mathematical Physics (math-ph)
subject: Biological Physics (physics.bio-ph)
subject: Quantitative Methods (q-bio.QM)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: This review presents the elastic theory of low-dimensional (one- and two-dimensional) continua and its applications in bio- and nano-structures. First, the curve and surface theory, as the geometric representation of the low-dimensional continua, is briefly described through Cartan moving frame method. The elastic theory of Kirchhoff rod, Helfrich rod, bending-soften rod, fluid membrane, and solid shell is revisited. Secondly, the application and availability of the elastic theory of low-dimensional continua in bio-structures, including short DNA rings, lipid membranes, and cell membranes, are discussed. The kink stability of short DNA rings is addressed by using the theory of Kirchhoff rod, Helfrich rod, and bending-soften rod. The lipid membranes obey the theory of fluid membrane. A cell membrane is simplified as a composite shell of lipid bilayer and membrane skeleton, which is a little similar to the solid shell. It is found that the membrane skeleton enhances highly the mechanical stability of cell membranes. Thirdly, the application and availability of the elastic theory of low-dimensional continua in nano-structures, including graphene and carbon nanotubes, are discussed. A revised Lenosky lattice model is proposed based on the local density approximation. Its continuum form up to the second order terms of curvatures and strains is the same as the free energy of 2D solid shells. Several typical mechanical properties of carbon nanotubes are revisited and investigated based on this continuum form. It is possible to avoid introducing the controversial concepts, the Young's modulus and thickness of graphene and single-walled carbon nanotubes, with this continuum form.
description: Review article for J. Comput. Theor. Nanosci., 27 pages, 15 figures
Strong alignment of prolate ellipsoids in Taylor-Couette flow
Creators: name: Assen, Martin P. A.
name: Ng, Chong Shen
name: Will, Jelle B.
name: Stevens, Richard J. A. M.
name: Lohse, Detlef
name: Verzicco, Roberto
Publisher: name: arXiv
Year: 2021
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: We report on the mobility and orientation of finite-size, neutrally buoyant prolate ellipsoids (of aspect ratio $Λ=4$) in Taylor-Couette flow, using interface resolved numerical simulations. The setup consists of a particle-laden flow in between a rotating inner and a stationary outer cylinder. We simulate two particle sizes $\ell/d=0.1$ and $\ell/d=0.2$, $\ell$ denoting the particle major axis and $d$ the gap-width between the cylinders. The volume fractions are $0.01\%$ and $0.07\%$, respectively. The particles, which are initially randomly positioned, ultimately display characteristic spatial distributions which can be categorised into four modes. Modes $(i)$ to $(iii)$ are observed in the Taylor vortex flow regime, while mode ($iv$) encompasses both the wavy vortex, and turbulent Taylor vortex flow regimes. Mode $(i)$ corresponds to stable orbits away from the vortex cores. Remarkably, in a narrow $\textit{Ta}$ range, particles get trapped in the Taylor vortex cores (mode ($ii$)). Mode $(iii)$ is the transition when both modes $(i)$ and $(ii)$ are observed. For mode $(iv)$, particles distribute throughout the domain due to flow instabilities. All four modes show characteristic orientational statistics. We find the particle clustering for mode ($ii$) to be size-dependent, with two main observations. Firstly, particle agglomeration at the core is much higher for $\ell/d=0.2$ compared to $\ell/d=0.1$. Secondly, the $\textit{Ta}$ range for which clustering is observed depends on the particle size. For this mode $(ii)$ we observe particles to align strongly with the local cylinder tangent. The most pronounced particle alignment is observed for $\ell/d=0.2$ around $\textit{Ta}=4.2\times10^5$. This observation is found to closely correspond to a minimum of axial vorticity at the Taylor vortex core ($\textit{Ta}=6\times10^5$) and we explain why.
description: 22 pages, 12 figures
Cooling Improves Cosmic Microwave Background Map-Making When Low-Frequency Noise is Large
Creators: name: Chiang, Bai-Chiang
name: Huffenberger, Kevin M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: In the context of Cosmic Microwave Background data analysis, we study the solution to the equation that transforms scanning data into a map. As originally suggested in "messenger" methods for solving linear systems, we split the noise covariance into uniform and non-uniform parts and adjust their relative weights during the iterative solution. With simulations, we study mock instrumental data with different noise properties, and find that this "cooling" or perturbative approach is particularly effective when there is significant low-frequency noise in the timestream. In such cases, a conjugate gradient algorithm applied to this modified system converges faster and to a higher fidelity solution than the standard conjugate gradient approach. We give an analytic estimate for the parameter that controls how gradually the linear system should change during the course of the solution.
Resumen narrativo sobre el proceso judicial vivenciado en primera persona ante la justicia ecuatoriana e internacional sobre el Síndrome de Laron.
Creators: name: Alejandro, Vasco-Toapanta Gabriel
name: Ramiro, Coba Gallegos
Publisher: name: Zenodo
Year: 2021
Subjects: Laron Syndrome
mecasermine
growth hormone

description: Laron syndrome has been investigated by Zvi Laron who, after describing this disease for
 the first time, has published several articles and a book about the syndrome, which has
 helped to improve its understanding. In Ecuador, Dr Jaime Guevara with a population of
 approximately 100 patients has contributed to understanding its peculiarities which are
 genetic, of an autosomal recessive type. It causes the most severe growth retardation of
 those caused by all other diseases, leading to physical disability in its carriers. The goal is
 to summarize and integrate the different publications about Laron syndrome to determine
 the causes and to understand the unjustified delay in the supply of medicine that patients
 require. This causes the proteins that make up the interacting receptors with the hormones
 to stimulate growth to be damaged, this means that: a person's growth is given by the
 growth hormone that at the level of several organs, especially the liver, stimulates the
 synthesis of IGF-1, which is a protein very similar to insulin, in Laron syndrome there is a
 growth hormone but the receptor is defective so the production of IGF-1 is not adequate and
 the treatment consists of placing synthetic analogs of the IGF-1 known as MECASERMINA.
 In Ecuador, obtaining the mecasermin for treatment, led to a lawsuit against the Ministry of
 Health, a lawsuit that was won in 2007 and the centennial was not fulfilled. They had to go
 to the legal department of the Universidad San Francisco de Quito whose members helped
 to press for compliance with the sentence and in 2019 treatment for patients who are still
 qualified finally began. As conclusion, we can say that the presence of genetic diseases will
 always be present, but with an appropriate treatment something can be done to improve the
 lives of people who suffer from it.
Memórias Moleculares
Creators: name: Dangelo, Leonardo
Publisher: name: Zenodo
Year: 2025
Subjects: subject: Science/education
subject: Science education
subject: Oral History
subject: Teacher Training

description: Resumo simples apresentado no XIII SICEA: Seminário de Institutos, Colégios e Escolas de Aplicação das Universidades Brasileiras 2024 na Universidade Federal de Viçosa (MG).
Thermally Assisted Current-Driven Bistable Precessional Regimes in Asymmetric Spin Valves
Creators: name: Gmitra, M.
name: Barnas, J.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Spin-transfer torque in asymmetric spin valves can destabilize both parallel and antiparallel configurations and can lead to precessional modes also in the absence of an external magnetic field. We find a bistable precessional regime in such systems and show that thermal fluctuations can excite transitions (telegraph noise) between the corresponding oscillatory regimes that are well separated by irreversible paths at low temperatures. Because of the thermally induced transitions, the frequency of the resulting current-driven oscillations is different from that obtained at very low temperatures. We also show that the power spectrum in the bistable region is dominated by the out-of-plane oscillatory mode.
description: 4 pages, 3 figures
From the warm magnetized atomic medium to molecular clouds
Creators: name: Hennebelle, P.
name: Banerjee, R.
name: Vazquez-Semadeni, E.
name: Klessen, R.
name: Audit, E.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: {It has recently been proposed that giant molecular complexes form at the sites where streams of diffuse warm atomic gas collide at transonic velocities.} {We study the global statistics of molecular clouds formed by large scale colliding flows of warm neutral atomic interstellar gas under ideal MHD conditions. The flows deliver material as well as kinetic energy and trigger thermal instability leading eventually to gravitational collapse.} {We perform adaptive mesh refinement MHD simulations which, for the first time in this context, treat self-consistently cooling and self-gravity.} {The clouds formed in the simulations develop a highly inhomogeneous density and temperature structure, with cold dense filaments and clumps condensing from converging flows of warm atomic gas. In the clouds, the column density probability density distribution (PDF) peaks at $\sim 2 \times 10^{21} \psc$ and decays rapidly at higher values; the magnetic intensity correlates weakly with density from $n \sim 0.1$ to $10^4 \pcc$, and then varies roughly as $n^{1/2}$ for higher densities.} {The global statistical properties of such molecular clouds are reasonably consistent with observational determinations. Our numerical simulations suggest that molecular clouds formed by the moderately supersonic collision of warm atomic gas streams.}
description: submitted to A&A
Cultura da convergência: perspectivas fluidas e digitais da contemporaneidade absorvidas pelo Bumba-Boi de Morros no estado do Maranhão
Creators: name: Silva, Rafaela Cristina
Publisher: name: Labfront/UEMG
Year: 2023

description: O artigo pretende apresentar um Estudo de Caso sobre o "Boi de Morros" - uma das muitas manifestações da Cultura Popular do Maranhão, sendo o Bumba meu boi considerado Patrimônio Imaterial da Humanidade desde 2019, pelo Instituto do Patrimônio Histórico e Artístico Nacional/IPHAN. A partir da teoria cunhada por Henry Jenkins sobre a Cultura de Convergência, a pesquisa qualitativa traz resultados de análise dos dados obtidos pela aplicação de entrevistas semiestruturadas e estudos pautados na investigação bibliográfica de referência e de fontes documentais midiáticas. Apresentaremos, portanto, alguns resultados convergentes a teoria de Jenkins no sentido das implicações da rápida obsolescência da tecnologia e como suas formas de consumo contribuíram na fluidez de valores próprios da contemporaneidade, transformando a maneira como interagimos com a tecnologia e uns com os outros, e como essas transformações impactam em mudanças nos aspectos culturais de uma sociedade.
Universal alternating order around impurities in antiferromagnets
Creators: name: Eggert, Sebastian
name: Syljuasen, Olav F.
name: Anfuso, Fabrizio
name: Andres, Markus
Publisher: name: arXiv
Year: 2007
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The study of impurities in antiferromagnets is of considerable interest in condensed matter physics. In this paper we address the elementary question of the effect of vacancies on the orientation of the surrounding magnetic moments in an antiferromagnet. In the presence of a magnetic field, alternating magnetic moments are induced, which can be described by a universal expression that is valid in any ordered antiferromagnet and turns out to be independent of temperature over a large range. The universality is not destroyed by quantum fluctuation, which is demonstrated by quantum Monte Carlo simulations in the two-dimensional Heisenberg antiferromagnet. Physical predictions for finite doping are made, which are relevant for experiments probing Knight shifts and the order parameter.
description: 5 pages, 2 figures. The most recent version in PDF format can be found at http://www.physik.uni-kl.de/eggert/papers/
The chiral critical point of Nf=3 QCD at finite density to the order (mu/T)^4
Creators: name: de Forcrand, Philippe
name: Philipsen, Owe
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: QCD with three degenerate quark flavours at zero baryon density exhibits a first order thermal phase transition for small quark masses, which changes to a smooth crossover for some critical quark mass m^c_0, i.e. the chiral critical point. It is generally believed that as an (even) function of quark chemical potential, m_c(mu), the critical point moves to larger quark masses, constituting the critical endpoint of a first order phase transition in theories with m\geq m^c_0. To test this, we consider a Taylor expansion of m_c(mu) around mu=0 and determine the first two coefficients from lattice simulations with staggered fermions on N_t=4 lattices. We employ two different techniques: a) calculating the coefficients directly from a mu=0 ensemble using a novel finite difference method, and b) fitting them to simulation data obtained for imaginary chemical potentials. The mu^2 and mu^4 coefficients are found to be negative by both methods, with consistent absolute values. Combining both methods gives evidence that also the mu^6 coefficient is negative. Hence, on coarse N_t=4 lattices a three-flavour theory with m > m^c_0 does not possess a chiral critical endpoint for quark chemical potentials mu\lsim T. Simulations on finer lattices are required for reliable continuum physics. Possible implications for the QCD phase diagram are discussed.
description: 15 pages, 8 figures. Published version, with additional cautionary statements, corrected typos, and updated last figure
High-sensitivity diamond magnetometer with nanoscale resolution
Creators: name: Taylor, J. M.
name: Cappellaro, P.
name: Childress, L.
name: Jiang, L.
name: Budker, D.
name: Hemmer, P. R.
name: Yacoby, A.
name: Walsworth, R.
name: Lukin, M. D.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We present a novel approach to the detection of weak magnetic fields that takes advantage of recently developed techniques for the coherent control of solid-state electron spin quantum bits. Specifically, we investigate a magnetic sensor based on Nitrogen-Vacancy centers in room-temperature diamond. We discuss two important applications of this technique: a nanoscale magnetometer that could potentially detect precession of single nuclear spins and an optical magnetic field imager combining spatial resolution ranging from micrometers to millimeters with a sensitivity approaching few femtotesla/Hz$^{1/2}$.
description: 29 pages, 4 figures
The curious case of the Buchdahl-Land-Sultana-Wyman-Ibañez-Sanz spacetime
Creators: name: Faraoni, Valerio
name: Jose, Sonia
name: Leblanc, Alexandre
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We revisit Wyman's "other" scalar field solution of the Einstein equations and its Sultana generalization to positive cosmological constant, which has a finite 3-space and corresponds to a special case of a stiff fluid solution proposed by Buchdahl and Land and, later, by Ibañez and Sanz to model relativistic stars. However, there is a hidden cosmological constant and the peculiar geometry prevents the use of this spacetime to model relativistic stars.
description: 11 pages, 3 figures
Infrared Spectral Energy Distributions of z~0.7 Star-Forming Galaxies
Creators: name: Zheng, Xian Zhong
name: Dole, Herve
name: Bell, Eric F.
name: Floc'h, Emeric Le
name: Rieke, George H.
name: Rix, Hans-Walter
name: Schiminovich, David
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We analyze the infrared (IR) spectral energy distributions (SEDs) for 10micron < lambda(rest) < 100micron for ~600 galaxies at z~0.7 in the extended Chandra Deep Field South by stacking their Spitzer 24, 70 and 160micron images. We place interesting constraints on the average IR SED shape in two bins: the brightest 25% of z~0.7 galaxies detected at 24micron, and the remaining 75% of individually-detected galaxies. Galaxies without individual detections at 24micron were not well-detected at 70micron and 160micron even through stacking. We find that the average IR SEDs of z~0.7 star-forming galaxies fall within the diversity of z~0 templates. While dust obscuration Lir/Luv seems to be only a function of star formation rate (SFR; ~ Lir+Luv), not of redshift, the dust temperature of star-forming galaxies (with SFR ~ 10 solar mass per year) at a given IR luminosity was lower at z~0.7 than today. We suggest an interpretation of this phenomenology in terms of dust geometry: intensely star-forming galaxies at z~0 are typically interacting, and host dense centrally-concentrated bursts of star formation and warm dust temperatures. At z~0.7, the bulk of intensely star-forming galaxies are relatively undisturbed spirals and irregulars, and we postulate that they have large amounts of widespread lower-density star formation, yielding lower dust temperatures for a given IR luminosity. We recommend what IR SEDs are most suitable for modeling intermediate redshift galaxies with different SFRs.
description: 12 pages, 11 figures, 2 tables, accepted for publication in ApJ
Sequestering the Gravitino: Neutralino Dark Matter in Gauge Mediation
Creators: name: Craig, Nathaniel J.
name: Green, Daniel
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In conventional models of gauge-mediated supersymmetry breaking, the lightest supersymmetric particle (LSP) is invariably the gravitino. However, if the supersymmetry breaking sector is strongly coupled, conformal sequestering may raise the mass of the gravitino relative to the remaining soft supersymmetry-breaking masses. In this letter, we demonstrate that such conformal dynamics in gauge-mediated theories may give rise to satisfactory neutralino dark matter while simultaneously solving the flavor and mu/ B mu problems.
description: 16 pages, 3 figures. References added, discussion of A-terms amended, figures revised
Topological expansion of the chain of matrices
Creators: name: Eynard, Bertrand
name: Ferrer, Aleix Prats
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We solve the loop equations to all orders in $1/N^2$, for the Chain of Matrices matrix model (with possibly an external field coupled to the last matrix of the chain). We show that the topological expansion of the free energy, is, like for the 1 and 2-matrix model, given by the symplectic invariants of the associated spectral curve. As a consequence, we find the double scaling limit explicitly, and we discuss modular properties, large $N$ asymptotics. We also briefly discuss the limit of an infinite chain of matrices (matrix quantum mechanics).
description: 23 pages, LateX
The accretion origin of the Milky Way's stellar halo
Creators: name: Bell, Eric F.
name: Zucker, Daniel B.
name: Belokurov, Vasily
name: Sharma, Sanjib
name: Johnston, Kathryn V.
name: Bullock, James S.
name: Hogg, David W.
name: Jahnke, Knud
name: de Jong, Jelte T. A.
name: Beers, Timothy C.
name: Evans, N. W.
name: Grebel, Eva K.
name: Ivezic, Zeljko
name: Koposov, Sergey E.
name: Rix, Hans-Walter
name: Schneider, Donald P.
name: Steinmetz, Matthias
name: Zolotov, Adi
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We have used data from the Sloan Digital Sky Survey (SDSS) Data Release 5 to explore the overall structure and substructure of the stellar halo of the Milky Way using about 4 million color-selected main sequence turn-off stars. We fit oblate and triaxial broken power-law models to the data, and found a `best-fit' oblateness of the stellar halo 0.5~100pc, after accounting for the (known) contribution of Poisson uncertainties. The fractional RMS deviation of the actual stellar distribution from any smooth, parameterized halo model is >~40%: hence, the stellar halo is highly structured. We compared the observations with simulations of galactic stellar halos formed entirely from the accretion of satellites in a cosmological context by analysing the simulations in the same way as the data. While the masses, overall profiles, and degree of substructure in the simulated stellar halos show considerable scatter, the properties and degree of substructure in the Milky Way's halo match well the properties of a `typical' stellar halo built exclusively out of the debris from disrupted satellite galaxies. Our results therefore point towards a picture in which an important fraction of the Milky Way's stellar halo has been accreted from satellite galaxies.
description: Submitted to the Astrophysical Journal. 14 pages; 11 figures
Physical Side-Channel Attacks on Embedded Neural Networks: A Survey
Creators: name: Real, Maria Méndez
name: Salvador, Rubén
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cryptography and Security (cs.CR)
subject: Machine Learning (cs.LG)
subject: Neural and Evolutionary Computing (cs.NE)
subject: FOS: Computer and information sciences

description: During the last decade, Deep Neural Networks (DNN) have progressively been integrated on all types of platforms, from data centers to embedded systems including low-power processors and, recently, FPGAs. Neural Networks (NN) are expected to become ubiquitous in IoT systems by transforming all sorts of real-world applications, including applications in the safety-critical and security-sensitive domains. However, the underlying hardware security vulnerabilities of embedded NN implementations remain unaddressed. In particular, embedded DNN implementations are vulnerable to Side-Channel Analysis (SCA) attacks, which are especially important in the IoT and edge computing contexts where an attacker can usually gain physical access to the targeted device. A research field has therefore emerged and is rapidly growing in terms of the use of SCA including timing, electromagnetic attacks and power attacks to target NN embedded implementations. Since 2018, research papers have shown that SCA enables an attacker to recover inference models architectures and parameters, to expose industrial IP and endangers data confidentiality and privacy. Without a complete review of this emerging field in the literature so far, this paper surveys state-of-the-art physical SCA attacks relative to the implementation of embedded DNNs on micro-controllers and FPGAs in order to provide a thorough analysis on the current landscape. It provides a taxonomy and a detailed classification of current attacks. It first discusses mitigation techniques and then provides insights for future research leads.
description: 25 pages, 7 figures
Upper limits on the escape fraction of ionizing radiation from galaxies at $2\lesssim z < 6$
Creators: name: Meštrić, U.
name: Ryan-Weber, E. V.
name: Cooke, J.
name: Bassett, R.
name: Prichard, L. J.
name: Rafelski, M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: In this work, we investigate upper limits on the global escape fraction of ionizing photons ($f_{\rm esc/global}^{\rm abs}$) from a sample of galaxies probed for Lyman-continuum (LyC) emission characterized as non-LyC and LyC leakers. We present a sample of 9 clean non-contaminated (by low redshift interlopers, CCD problems and internal reflections of the instrument) galaxies which do not show significant ($>$ $3σ$) LyC flux between 880Å $
description: 17 pages, 5 Figures
Letter from Kathleen Raine to Robin Skelton, [November 27, 1954]
Creators: name: Raine, Kathleen, 1908-2003
Publisher: name: University of Victoria Libraries
Year: 2023
Subjects: subject: Editors
valueUri: http://id.worldcat.org/fast/902475
subject: Novelists, English
valueUri: http://id.worldcat.org/fast/1039718
subject: Raine, Kathleen, 1908-2003
valueUri: http://id.worldcat.org/fast/52672
subject: Philosophy
valueUri: http://id.worldcat.org/fast/1060777
subject: FOS: Philosophy, ethics and religion
subject: Authors, English
valueUri: http://id.worldcat.org/fast/821945
subject: Scholars
valueUri: http://id.worldcat.org/fast/1106878
subject: Neoplatonism
valueUri: http://id.worldcat.org/fast/1035884
subject: Poets
valueUri: http://id.worldcat.org/fast/1067778
subject: Platonists
valueUri: http://id.worldcat.org/fast/1066881
subject: Novelists
valueUri: http://id.worldcat.org/fast/1039684
subject: Authors
valueUri: http://id.worldcat.org/fast/821688
subject: Critics
valueUri: http://id.worldcat.org/fast/883769
subject: English poetry--Manuscripts
valueUri: http://id.worldcat.org/fast/912320
subject: Periodical editors
valueUri: http://id.worldcat.org/fast/1058064
subject: Literature, Modern
valueUri: http://id.worldcat.org/fast/1000172
subject: Book industries and trade
valueUri: http://id.worldcat.org/fast/836171
subject: Wiccans
valueUri: http://id.worldcat.org/fast/1765210
subject: Poets, English
valueUri: http://id.worldcat.org/fast/1067870
subject: Skelton, Robin
valueUri: http://id.worldcat.org/fast/51853
subject: Periodicals--Publishing
valueUri: http://id.worldcat.org/fast/1058100

description: Part of a collection of correspondence from Kathleen Raine to Robin Skelton. Skelton was a British poet, academic, anthologist, and practicing Wiccan. He taught at Manchester University before emigrating to Canada in 1963, where he taught creative writing at the University of Victoria and started the literary magazine The Malahat Review. Also included are some letters to Skelton’s wife Sylvia, and his daughters. Spanning close to forty-five years, the correspondence discusses poetry, writing, and philosophy; particularly Platonism and Neoplatonism. Raine often refers to the writings of William Blake and W. B. Yeats. Many letters also mention contemporary literary figures at the time including: Herbert Read, Peter Russell, Liam Miller, and Thurairajah Tambimuttu. In this letter, Raine writes about Gavin Maxwell, Plato versus Jung in the invention of the archetypes, and psychology and the metaphysical.
Two Higgs Bi-doublet Left-Right Model With Spontaneous P and CP Violation
Creators: name: Wu, Yue-Liang
name: Zhou, Yu-Feng
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: A left-right symmetric model with two Higgs bi-doublet is shown to be a consistent model for both spontaneous P and CP violation. The flavor changing neutral currents can be suppressed by the mechanism of approximate global U(1) family symmetry. We calculate the constraints from neural $K$ meson mass difference $Δm_K$ and demonstrate that a right-handed gauge boson $W_2$ contribution in box-diagrams with mass well below 1 TeV is allowed due to a cancellation caused by a light charged Higgs boson with a mass range $150 \sim 300$ GeV. The $W_2$ contribution to $ε_K$ can be suppressed from appropriate choice of additional CP phases appearing in the right-handed Cabbibo-Kobayashi-Maskawa matrix. The model is also found to be fully consistent with $B^0$ mass difference $Δm_B$, and the mixing-induced CP violation quantity $\sin2β_{J/ψ}$, which is usually difficult for the model with only one Higgs bi-doublet. The new physics beyond the standard model can be directly searched at the colliders LHC and ILC.
description: 25 pages, 6 figures, typos corrected, 1 figure added, published version
Moderator guide for the SmartBreakfast online community
Creators: name: Talens, Clara
name: Santa Cruz, Elena
Publisher: name: Zenodo
Year: 2021
Subjects: online community
conusmer behaviour
personalised nutrition
breakfast
3D food printing

description: Moderator guide followed during the 2-month online community study conducted for the EIT-Food SmartBreakfast project.
description: This project has received funding from the European Institute of Innovation and Technology (EIT) Food (18075)
Discovery of Fast-Moving X-Ray--Emitting Ejecta Knots in the Oxygen-Rich Supernova Remnant Puppis A
Creators: name: Katsuda, S.
name: Mori, K.
name: Tsunemi, H.
name: Park, S.
name: Hwang, U.
name: Burrows, D. N.
name: Hughes, J. P.
name: Slane, P. O.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report on the discovery of fast-moving X-ray--emitting ejecta knots in the Galactic Oxygen-rich supernova remnant Puppis A from XMM-Newton observations. We find an X-ray knotty feature positionally coincident with an O-rich fast-moving optical filament with blue-shifted line emission located in the northeast of Puppis A. We extract spectra from northern and southern regions of the feature. Applying a one-component non-equilibrium ionization model for the two spectra, we find high metal abundances relative to the solar values in both spectra. This fact clearly shows that the feature originates from metal-rich ejecta. In addition, we find that line emission in the two regions is blue-shifted. The Doppler velocities derived in the two regions are different with each other, suggesting that the knotty feature consists of two knots that are close to each other along the line of sight. Since fast-moving O-rich optical knots/filaments are believed to be recoiled metal-rich ejecta, expelled to the opposite direction against the high-velocity central compact object, we propose that the ejecta knots disclosed here are also part of the recoiled material.
description: 16 pages, 3 figures