cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Spin memory of the topological material under strong disorder
Creators: name: Korzhovska, Inna
name: Deng, Haiming
name: Zhao, Lukas
name: Chen, Zhiyi
name: Konczykowski, Marcin
name: Zhao, Shihua
name: Raoux, Simone
name: Krusin-Elbaum, Lia
Publisher: name: arXiv
Year: 2019
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Robustness to disorder - the defining property of any topological state - has been mostly tested in low-disorder translationally-invariant materials systems where the protecting underlying symmetry, such as time reversal, is preserved. The ultimate disorder limits to topological protection are still unknown, however, a number of theories predict that even in the amorphous state a quantized conductance might yet reemerge. Here we report a directly detected robust spin response in structurally disordered thin films of the topological material Sb2Te3 free of extrinsic magnetic dopants, which we controllably tune from a strong (amorphous) to a weak crystalline) disorder state. The magnetic signal onsets at a surprisingly high temperature (~ 200 K) and eventually ceases within the crystalline state. We demonstrate that in a strongly disordered state disorder-induced spin correlations dominate the transport of charge - they engender a spin memory phenomenon, generated by the nonequilibrium charge currents controlled by localized spins. The negative magnetoresistance (MR) in the extensive spin-memory phase space is isotropic. Within the crystalline state, it transitions into a positive MR corresponding to the weak antilocalization (WAL) quantum interference effect, with a 2D scaling characteristic of the topological state. Our findings demonstrate that these nonequilibrium currents set a disorder threshold to the topological state; they lay out a path to tunable spin-dependent charge transport and point to new possibilities of spin control by disorder engineering of topological materials
A general-purpose nomogram generator for predictive logistic regression models
Creators: name: Zlotnik, Alexander
name: Abraira, Víctor
name: Zlotnik, Alexander
name: Abraira, Víctor
Publisher: name: Unknown
Year: 2015
Subjects: subject: Research Methods/ Statistical Methods
subject: nomolog
subject: graphics
subject: logistic
subject: logit
subject: xtline
subject: nomogram
subject: Kattan nomogram
subject: logistic nomogram
subject: clinical nomogram

description: Multivariate logistic regression is a statistical method commonly used in several fields to build predictive models. A nomogram is a tool that provides graphical depictions of all variables in the model and enables the user to easily compute output probabilities. Our objective was to build a flexible and easy-to-use nomogram generator in Stata. The script works after arbitrary logit or logistic commands.
A Biblioteca Municipal de Coimbra como elemento de alfabetização
Creators: name: Silva, Armando Carneiro
Publisher: name: Cadernos BAD
Year: 2003

description: Com base em estatísticas, analisa-se a evolução do número e tipos de leitores da biblioteca, concluindo-se que aquelas assinalam uma constante curva ascendente, motivada sobretudo pelo serviço de empréstimo. Demonstra-se finalmente a necessidade urgente de transferir os serviços para edifício próprio e mais amplo.
description: Cadernos BAD, N.º 4 (1965)
Mixed baroclinic convection in a cavity
Creators: name: Kumar, Abhishek
name: Pothérat, Alban
Publisher: name: arXiv
Year: 2019
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We study the convective patterns that arise in a nearly semi-cylindrical cavity fed in with hot fluid at the upper boundary, bounded by a cold, porous semi-circular boundary at the bottom, and infinitely extended in the third direction. While this configuration is relevant to continuous casting processes that are significantly more complex, we focus on the flow patterns associated with the particular form of mixed convection that arises in it. Linear stability analysis and direct numerical simulations (DNS) are conducted, using the spectral element method to identify observable states. The nature of the bifurcations is determined through Stuart--Landau analysis for completeness. The base flow consists of two counter-rotating rolls driven by the baroclinic imbalance due to the curved isothermal boundary. These are however suppressed by the through-flow, which is found to have a stabilising influence as soon as the Reynolds number $Re$ based on the through-flow exceeds 25. For a sufficiently high Rayleigh number, this base flow is linearly unstable to three different modes, depending on $Re$. For $Re\leq75$, the rolls destabilise through a supercritical bifurcation into a travelling wave. For $100\leq Re \leq 110$, a subcritical bifurcation leads to a standing oscillatory mode, whereas for $Re\geq150$, the unstable mode is non-oscillatory and grows out of a supercritical bifurcation. The direct numerical simulations confirm that in all cases, the dominant mode returned by the linear stability analysis precisely matches the topology and evolution of the flow patterns that arise out of the fully nonlinear dynamics.
Mass spectrum of pseudo-scalar glueballs from a Bethe-Salpeter approach with the rainbow-ladder truncation
Creators: name: Kaptari, L. P.
name: Kämpfer, B.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We suggest a framework based on the rainbow approximation to the Dyson-Schwinger and Bethe-Salpeter equations with effective parameters adjusted to lattice QCD data to calculate the masses of the ground and excited states of pseudo-scalar glueballs. The structure of the truncated Bethe-Salpeter equation with the gluon and ghost propagators as solutions of the truncated Dyson-Schwinger equations is analysed in Landau gauge. Both, the Bete-Salpeter and Dyson-Schwinger equations, are solved numerically within the same rainbow-ladder truncation with the same effective parameters which ensure consistency of the approach. We found that with a set of parameters, which provides a good description of the lattice data within the Dyson-Schwinger approach, the solutions of the Bethe Salpeter equation for the pseudo-scalar glueballs exhibit a rich mass spectrum which also includes the ground and excited states predicted by lattice calculations. The obtained mass spectrum contains also several intermediate excitations beyond the lattice approaches. The partial Bethe-Salpeter amplitudes of the pseudo-scalar glueballs are presented as well.
description: 20 pages, 6 figures. arXiv admin note: text overlap with arXiv:1811.01479
PSSOH 2020 (Applications of Free Software and Open Hardware) Conference Report
Creators: name: Miljković, Nadica
name: Pejović, Predrag
name: Cvetanović, Miloš
Publisher: name: Zenodo
Year: 2021
Subjects: free software
open hardware
conference
workshop
women in STEM
electrical engineering
computer science
open science
gender equality

description: This document presents general PSSOH 2020 conference (http://pssoh.etf.bg.ac.rs/) report that can be used by our donors, partners, and other parties to spread the word about free software, open hardware and women in electrical engineering and computer science. Previous PSSOH conference reports: PSSOH 2018 report, doi: 10.5281/zenodo.1469315 PSSOH 2019 report, doi: 10.5281/zenodo.3588396
Transition matrix for a bivariate normal distribution in Stata
Creators: name: Savegnago, Marco
name: Savegnago, Marco
Publisher: name: Unknown
Year: 2015
Subjects: subject: Research Methods/ Statistical Methods
subject: trabinor
subject: transition matrix
subject: bivariate normal
subject: binormal()

description: trabinor calculates the population transition matrix between two discretized variables when the original continuous variables follow a bivariate normal distribution. The user can specify the five parameters of bivariate normal and how to discretize the two variables by choosing either a given number of quantiles or a set of absolute boundaries.
Potential of the Agricultural Value Chain Improvement in Pakistan
Creators: name: Ali, M.
name: Ali, M.
Publisher: name: Unknown
Year: 2018
Subjects: Agricultural and Food Policy
International Development

description: This paper analyzes the status of Pakistan’s agriculture in the world and quantifies the potential of improving productivity and quality of value chain at its different nodes. A great potential of expansion in the value chain of large number of agricultural commodities produced in Pakistan are observed. Just bringing the average crop yield levels at par to the world average yield can generate over US$11 billion additional revenues to the producers. Despite lower yield, majority of commodities have lower prices compared to the world average prices at the farmgate. However, the country lost its comparative advantage as its export-output ratios (EOR) and export prices are lower than the world average for a large number of commodities. Similarly the quality of the produce in domestic market is observed to be low. If Pakistan can improve its EOR and export prices to the world average levels and enhance the quality of 10% its agriculture output in domestic market to the average export quality, it can generate US$8.8 to various stakeholders in the value chain. Cluster-based development approach is suggested to harness the potential in agricultural value chain. Various measures are suggested to improve productivity and quality of agricultural value chain in Pakistan.
A diffusion MRI model for random walks confined on cylindrical surfaces: Towards non-invasive quantification of myelin sheath radius
Creators: name: Canales-Rodríguez, Erick J
name: Tax, Chantal M. W.
name: Fischi-Gomez, Elda
name: Jones, Derek K.
name: Thiran, Jean-Philippe
name: Rafael-Patiño, Jonathan
Publisher: name: arXiv
Year: 2024
Subjects: subject: Medical Physics (physics.med-ph)
subject: FOS: Physical sciences

description: Quantifying the myelin sheath radius of myelinated axons in vivo is important for understanding, diagnosing, and monitoring various neurological disorders. Despite advancements in diffusion MRI (dMRI) microstructure techniques, there are currently no models specifically designed to estimate myelin sheath radii. This proof-of-concept theoretical study presents two novel dMRI models that characterize the signal from water diffusion confined to cylindrical surfaces, approximating myelin water diffusion. We derive their spherical mean signals, eliminating fiber orientation and dispersion effects for convenience. These models are further extended to account for multiple concentric cylinders, mimicking the layered structure of myelin. Additionally, we introduce a method to convert histological distributions of axonal inner radii from the literature into myelin sheath radius distributions. We also derive analytical expressions to estimate the effective myelin sheath radius expected from these distributions. Monte Carlo (MC) simulations conducted in cylindrical and spiral geometries validate the models. These simulations demonstrate agreement with analytical predictions. Furthermore, we observe significant correlations between the effective radii derived from histological distributions and those obtained by fitting the dMRI signal to a single-cylinder model. These models may be integrated with existing multi-compartment dMRI techniques, opening the door to non-invasive in vivo assessments of myelin sheath radii. Such assessments would require MRI scanners equipped with strong diffusion gradients, allowing measurements with short echo times. Further work is required to validate the technique with real dMRI data and histological measurements.
description: 55 pages, 7 figures, 1 table, manuscript accepted in Frontiers in Physics
Counting primes, groups and manifolds
Creators: name: Goldfeld, D.
name: Lubotzky, A.
name: Nikolov, N.
name: Pyber, L.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 20H05; 22E40

description: Let $Λ= \mathrm{SL}_2(\Bbb Z)$ be the modular group and let $c_n(Λ)$ be the number of congruence subgroups of $Λ$ of index at most $n$. We prove that $\lim\limits_{n\to \infty} \frac{\log c_n(Λ)}{(\log n)^2/\log\log n} = \frac{3-2\sqrt{2}}{4}.$ The proof is based on the Bombieri-Vinogradov `Riemann hypothesis on the average' and on the solution of a new type of extremal problem in combinatorial number theory. Similar surprisingly sharp estimates are obtained for the subgroup growth of lattices in higher rank semisimple Lie groups. If $G$ is such a Lie group and $Γ$ is an irreducible lattice of $G$ it turns out that the subgroup growth of $Γ$ is independent of the lattice and depends only on the Lie type of the direct factors of $G$. It can be calculated easily from the root system. The most general case of this result relies on the Generalized Riemann Hypothesis but many special cases are unconditional. The proofs use techniques from number theory, algebraic groups, finite group theory and combinatorics.
description: 11 pages
Leituras
Creators: name: Machado, Helder Rocha
name: Batalha, Vera
name: Leitão, Paulo
name: Penteado, Pedro
Publisher: name: Cadernos BAD
Year: 2003

description: UNIÃO EUROPEIA. Comissão Europeia. Communication de la Commission au Conseil, au Parlement Européen, au Comité Économique et Social et au Comité des Régions sur une stratégie d’information et de communication pour l’Union Européenne [em linha]. Bruxelles : Commission européenne, 2 juillet 2002 [referência de 22 de Julho 2002]. Disponível na Internet em : . BERNERS-LEE, Tim e outro – Tejendo la red. Madrid: Siglo Veintiuno de España, 2000, 237 p. CASTELS, Manuel – La galaxia Internet: reflexiones sobre Internet, empresa y sociedad. Barcelona: Areté, 2001, 316 p. COUTURE, Carol (dir.) – Les fonctions de l’archivistique contemporaine. Québec: Les Presses de l’Université du Québec, 1999. 560 p. Colecção «Gestion de l’information », 7.
description: Cadernos BAD, N.º 1 (2002): Informação: um Direito de Cidadania
A ética para os profissionais da informação audiovisual: o devir tecnológico a moldar uma atitude
Creators: name: Cirne, Maria Teresa
name: Ferreira, Sónia
Publisher: name: Cadernos BAD
Year: 2003

description: A documentação audiovisual suscita um conjunto de considerações técnicas que têm necessariamente repercussões no plano da ética. Daqui decorre uma atitude profissional que deverá ser adoptada por todos os arquivistas. Partindo deste pressuposto, torna-se fundamental positivar um conjunto de normas genéricas que fundamentem um comportamento profissional nesta área da informação. Por outro lado, emerge naturalmente a quase imprescindibilidade da inserção da disciplina Ética Informacional nos cursos de especialização de Ciências Documentais.
description: Cadernos BAD, N.º 1 (2002): Informação: um Direito de Cidadania
Probing red-supergiant atmospheres and winds with early-time high-cadence high-resolution type II supernova spectra
Creators: name: Dessart, Luc
Publisher: name: arXiv
Year: 2024
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: High-cadence high-resolution spectroscopic observations of infant Type II supernovae (SNe) represent an exquisite probe of the atmospheres and winds of exploding red-supergiant (RSG) stars. Using radiation hydrodynamics and radiative transfer, we study the gas and radiation properties during and after the phase of shock breakout, considering RSG progenitors enshrouded within a circumstellar material (CSM) that varies in extent, density, and velocity profile. In all cases, the original, unadulterated CSM structure is probed only at the onset of shock breakout, visible in high-resolution spectra as narrow, often blueshifted emission, possibly with an absorption trough. As the SN luminosity rises during breakout, radiative acceleration of the unshocked CSM starts, leading to a broadening of the ``narrow'' lines by ~100 and up to ~1000km/s, depending on CSM properties. This acceleration is maximum close to the shock, where the radiative flux is greater, and thus typically masked by optical-depth effects. Generally, narrow-line broadening is greater for more compact, tenuous CSM because of the proximity to the shock where the flux is born, and smaller in denser and more extended CSM. Narrow-line emission should show a broadening that slowly increases first (the line forms further out in the original wind), then sharply rises (the line forms in a region that is radiatively accelerated), before decreasing until late times (the line forms further away in regions more weakly accelerated). Radiative acceleration should inhibit X-ray emission during the early, IIn phase. Although high spectral resolution is critical at the earliest times to probe the original slow wind, radiative acceleration and associated line broadening may be captured with medium resolution allowing a simultaneous view of narrow, Doppler-broadened as well as extended, electron-scattering broadened line emission.
description: Submitted to A&A
ReFreeDrive - Deliverable 6.9: Power Electronics for the 75kW power setting (Executive Summary only)
Creators: name: Loggia, Emidio Della
name: D'Innocenzo, Flavio
Publisher: name: Zenodo
Year: 2021
Subjects: power electronics
printed circuit boards
SiC modules
medium power range inverter
DC bus bars

description: Executive Summary corresponding to the ReFreeDrive project deliverable D6.9: "Power Electronics for the 75kW power setting"
Los portales documentales virtuales: objetivos y construcción
Creators: name: López Lucas, Jesús
Publisher: name: Cadernos BAD
Year: 2003

description: O aparecimento da Internet veio criar a maior ferramenta de informação de todos os tempos, mas também a mais dispersa e desorganizada, pelo que as empresas de marketing e comunicação criaram portais para fornecer serviços e conteúdos aos seus clientes numa perspectiva comercial.O campo da documentação acompanhou de perto este crescimento e desordem da informação, pelo que se torna cada dia mais necessário que os especialistas da documentação organizem a informação existente na Internet, criando portais documentais que optimizem a navegação dos seus utilizadores no processo de identificação, localização e acesso ao documento e permitam a comunicação entre documentalistas e a comunidade científica. Em síntese, o portal documental deve procurar dar resposta a todas as necessidades de informação dos utilizadores das nossas bibliotecas e centros de documentação.
description: Cadernos BAD, N.º 1 (2002): Informação: um Direito de Cidadania
Dynamical activity universally bounds precision of response in Markovian nonequilibrium systems
Creators: name: Liu, Kangqiao
name: Gu, Jie
Publisher: name: arXiv
Year: 2024
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The exploration of far-from-equilibrium systems has been at the forefront of nonequilibrium thermodynamics, with a particular focus on understanding the fluctuations and response of thermodynamic systems to external perturbations. In this study, we introduce a universal response kinetic uncertainty relation, which provides a fundamental trade-off between the precision of response for generic observables and dynamical activity in Markovian nonequilibrium systems. We demonstrate the practical applicability and tightness of the derived bound through illustrative examples. Our results are applicable to a broad spectrum of Markov jump processes, ranging from currents to non-current variables, from steady states to time-dependent driving, from continuous time to discrete time, and including Maxwell's demon or absolute irreversibility. Our findings not only enhance the theoretical foundation of stochastic thermodynamics but also may hold potential implications for far-from-equilibrium biochemical processes.
description: 17 + 0 pages, 3 + 0 figures, 1 + 0 tables. *title changed; new figure and new sections added
Flashing motor at high transition rate
Creators: name: Ai, Bao-Quan
name: Wang, Liqiu
name: Liu, Liang-Gang
Publisher: name: arXiv
Year: 2003
Subjects: subject: Biological Physics (physics.bio-ph)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: The movement of a Brownian particle in a fluctuating two-state periodic potential is investigated. At high transition rate, we use a perturbation method to obtain the analytical solution of the model. It is found that the net current is a peaked function of thermal noise, barrier height and the fluctuation ratio between the two states. The thermal noise may facilitate the directed motion at a finite intensity. The asymmetry parameter of the potential is sensitive to the direction of the net current.
description: 6 pages, 5 figures
The 2015-16 El Niño-induced drought crisis in Southern Africa: What do we learn from historical data?
Creators: name: Ainembabazi, J.H.
name: Ainembabazi, J.H.
Publisher: name: Unknown
Year: 2018
Subjects: Environmental Economics and Policy
International Development

description: Food crop production declined by up to 66% in various Southern African countries as a result of El Niño induced drought during the 2015-2016 cropping seasons. This drought shock has led to emergence of food crisis throughout the region. This paper analyses the current drought impacts and how they are linked to historical droughts in order to draw lessons for building sustainable resilience mechanisms. The analysis uses both national and household level data. Evidence shows that up to early 1990s, drought shocks in Southern Africa were less frequent. During this period, the yields for major crops were generally low and stagnant. However, at the beginning of early 2000s the frequency of drought occurrence increased considerably. There was corresponding increase in yields of roots and tubers and vegetables in some countries, while yields for cereals and pulses remained more or less stagnant. Findings further show that in countries where there are considerable increases in yields of either roots and tubers or vegetables, there is a substantial decline in prevalence of undernourishment and food inadequacy. Overall, promoting nontraditional high value crops come out as key policy implications for resilience-improving interventions and food security improvements.
Qualidade e avaliação curricular em Biblioteconomia: perspectivas de docentes, egressos e empregadores
Creators: name: Beraquet, Vera Sílvia Marão
name: Ciol, Renata
name: Santos, Maria Lygia Kopke
name: Stefani, Regina Celia
Publisher: name: Cadernos BAD
Year: 2003

description: Recentes mudanças na legislação do ensino superior no Brasil e as transformações que vêm ocorrendo no país e no mundo, trazem novos desafios às instituições formadoras de profissionais, dentre os quais a necessidade urgente de melhor sintonia com o mercado de trabalho de seus egressos.Esta pesquisa teve como objetivos: a) identificar qual tem sido o desempenho do Curso de Graduação em Biblioteconomia da PUC-Campinas; b) verificar se existe congruência entre a formação profissional proporcionada pela FABI/PUC-Campinas e a prática de seus egressos; c) conhecer a avaliação que os docentes fazem de seu próprio trabalho e d) identificar as principais expectativas das organizações empregadoras quanto ao perfil e atuação do profissional da informação.Os dados necessários à pesquisa foram coletados por meio de questionários junto aos egressos de 1991 a 1995, junto docentes do curso e, por meio de entrevistas estruturadas, junto aos empregadores em diversos tipos de instituição. Os resultados da pesquisa vêm sendo utilizados nas mudanças curriculares implantadas no Curso a partir de 2000.
description: Cadernos BAD, N.º 1 (2002): Informação: um Direito de Cidadania
A Note on Inflation with Tachyon Rolling on the Gauss-Bonnet Brane
Creators: name: Paul, B. C.
name: Sami, M.
Publisher: name: arXiv
Year: 2003
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In this paper we study the tachyonic inflation in brane world cosmology with Gauss-Bonnet term in the bulk. We obtain the exact solution of slow roll equations in case of exponential potential. We attempt to implement the proposal of Lidsey and Nunes, astro-ph/0303168, for the tachyon condensate rolling on the Gauss-Bonnet brane and discuss the difficulties associated with the proposal.
description: RevTex4, 5 pages, no figures, Minor clarifications added and references updated, To appear in PRD
Perspectivas para o futuro dos arquivos de família em Portugal
Creators: name: Peixoto, Pedro
Publisher: name: Cadernos BAD
Year: 2003

description: Pretende-se, neste artigo, reflectir sobre aspectos fundamentais para o desenvolvimento do trabalho arquivístico em fundos de família, bem como equacionar pressupostos fundamentais para o desenvolvimento de uma política nacional para este tipo de fundos. O trabalho desenvolvido até ao momento, as questões teóricas e a abordagem legislativa, bem como a componente da investigação, fazem parte de uma preocupação clara do autor na abordagem desta matéria.
description: Cadernos BAD, N.º 1 (2002): Informação: um Direito de Cidadania
Os dados pessoais e os arquivos
Creators: name: Silveira, Luís
Publisher: name: Cadernos BAD
Year: 2003

description: Com respeito à protecção de dados pessoais dos leitores, defende-se que estes não devem, nas salas de leitura, estar sujeitos a videovigilância.No tocante ao acesso a documentos integrados em arquivos, salienta-se que o regime de protecção de dados pessoais constante da legislação geral dos arquivos, da Lei de Acesso aos Documentos da Administração e da Lei de Protecção de Dados Pessoais apresenta incongruências.Deveria, por isso, proceder-se à compatibilização destes diplomas legais.
description: Cadernos BAD, N.º 1 (2002): Informação: um Direito de Cidadania
Estimating almost-ideal demand systems with endogenous regressors
Creators: name: Lecocq, Sébastien
name: Robin, Jean-Marc
name: Lecocq, Sébastien
name: Robin, Jean-Marc
Publisher: name: Unknown
Year: 2015
Subjects: subject: Research Methods/ Statistical Methods
subject: aidsills
subject: aidsills_pred
subject: aidsills_elas
subject: almost ideal
subject: demand system
subject: quadratic
subject: endogeneity
subject: iterated
subject: linear
subject: least squares

description: In this article, we present the new \texttt{aidsills} command for estimating almost-ideal demand systems and their quadratic extensions. In contrast with Poi's (2012, {\sl Stata Journal} 12: 433--446) \texttt{quaids} command, which is based on the nonlinear \texttt{nlsur} command, {\tt aidsills} uses the computationally attractive iterated linear least-squares estimator developed by Blundell and Robin (1999, {\sl Journal of Applied Econometrics} 14: 209--232). The new command further allows one to account for endogenous prices and total expenditure by using instrumental-variable techniques. Elasticities and their standard errors can be obtained using the \texttt{aidsills\_elas} postestimation command.
Introduction of spin centers in single crystals of Ba$_2$CaWO$_{6-δ}$
Creators: name: Sinha, Mekhola
name: Pearson, Tyler J.
name: Reeder, Tim R.
name: Vivanco, Hector K.
name: Freedman, Danna E.
name: Phelan, W. Adam
name: McQueen, Tyrel M.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Developing the field of quantum information science (QIS) hinges upon designing viable qubits, the smallest unit in quantum computing. One approach to creating qubits is introducing paramagnetic defects into semiconductors or insulators. This class of qubits has seen success in the form of nitrogen-vacancy centers in diamond, divacancy defects in SiC, and P doped into Si. These materials feature paramagnetic defects in a low nuclear spin environment to reduce the impact of nuclear spin on electronic spin coherence. In this work, we report single crystal growth of Ba$_2$CaWO$_{6-δ}$, and the coherence properties of controllably introduced W$^{5+}$ spin centers generated by oxygen vacancies. Ba$_2$CaWO$_{6-δ}$ ($δ$ = 0) is a B-site ordered double perovskite with a temperature-dependent octahedral tilting wherein oxygen vacancies generate W$^{5+}$ (d$^1$), $S = \frac{1}{2}, I$ = 0, centers. We characterized these defects by measuring the spin-lattice ($T_1$) and spin-spin relaxation ($T_2$) times from T = 5 to 150 K. At T = 5 K, $T_1$ = 310 ms and $T_2$ = 4 $μ$s, establishing the viability of these qubit candidates. With increasing temperature, $T_2$ remains constant up to T = 60 K and then decreases to $T_2$ $\approx$ 1 $μ$s at T = 90 K, and remains roughly constant until T = 150 K, demonstrating the remarkable stability of $T_2$ with increasing temperature. Together, these results demonstrate that controlled defect generation in double perovskite structures can generate viable paramagnetic point centers for quantum applications and expand the field of potential materials for QIS.
description: 9 pages, 5 figures
Access to Piped Water, Time Savings and Absenteeism in School: Evidence from India
Creators: name: Vanaja, S.
name: Vanaja, S.
Publisher: name: Unknown
Year: 2018
Subjects: Agricultural and Food Policy
International Development

description: Access to piped water at home is often unavailable to people living in the rural areas of many developing countries. Providing in-house piped water connections can reduce the time spent in collecting water from outside sources by different household members, especially women and girls. In this paper, we use variation in the non-self-community ratio of access to piped water for predicting household access and its effect on time savings and school outcomes for children in rural India. The results indicate that there are time savings for households that have access to piped water, which in turn reduces the number of days children miss school annually. Furthermore, this study addresses the issue of endogeneity to some extent by using child and household fixed effects along with the non-self-community ratio as an instrumental variable for household access to piped water.
BlueSuffix: Reinforced Blue Teaming for Vision-Language Models Against Jailbreak Attacks
Creators: name: Zhao, Yunhan
name: Zheng, Xiang
name: Luo, Lin
name: Li, Yige
name: Ma, Xingjun
name: Jiang, Yu-Gang
Publisher: name: arXiv
Year: 2024
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Artificial Intelligence (cs.AI)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: In this paper, we focus on black-box defense for VLMs against jailbreak attacks. Existing black-box defense methods are either unimodal or bimodal. Unimodal methods enhance either the vision or language module of the VLM, while bimodal methods robustify the model through text-image representation realignment. However, these methods suffer from two limitations: 1) they fail to fully exploit the cross-modal information, or 2) they degrade the model performance on benign inputs. To address these limitations, we propose a novel blue-team method BlueSuffix that defends target VLMs against jailbreak attacks without compromising its performance under black-box setting. BlueSuffix includes three key components: 1) a visual purifier against jailbreak images, 2) a textual purifier against jailbreak texts, and 3) a blue-team suffix generator using reinforcement fine-tuning for enhancing cross-modal robustness. We empirically show on four VLMs (LLaVA, MiniGPT-4, InstructionBLIP, and Gemini) and four safety benchmarks (Harmful Instruction, AdvBench, MM-SafetyBench, and RedTeam-2K) that BlueSuffix outperforms the baseline defenses by a significant margin. Our BlueSuffix opens up a promising direction for defending VLMs against jailbreak attacks. Code is available at https://github.com/Vinsonzyh/BlueSuffix.
ReFreeDrive - Deliverable 6.7: Pure Synchronous Reluctance Motor for 200kW of operation (Executive Summary only)
Creators: name: Villani, Marco
name: Fabri, Giuseppe
name: Credo, Andrea
name: Benedetto, Matteo
Publisher: name: Zenodo
Year: 2021
Subjects: pure synchronous reluctance motor
manufacturing
motor assembly
stator winding
cooling jacket

description: Executive Summary corresponding to the ReFreeDrive project deliverable D6.7: "Pure Synchronous Reluctance Motor for 200kW of operation"
SignCol: Open-Source Software for Collecting Sign Language Gestures
Creators: name: Eslami, Mohammad
name: Karami, Mahdi
name: Eslami, Sedigheh
name: Tabarestani, Solale
name: Torkamani-Azar, Farah
name: Meinel, Christoph
Publisher: name: arXiv
Year: 2019
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Sign(ed) languages use gestures, such as hand or head movements, for communication. Sign language recognition is an assistive technology for individuals with hearing disability and its goal is to improve such individuals' life quality by facilitating their social involvement. Since sign languages are vastly varied in alphabets, as known as signs, a sign recognition software should be capable of handling eight different types of sign combinations, e.g. numbers, letters, words and sentences. Due to the intrinsic complexity and diversity of symbolic gestures, recognition algorithms need a comprehensive visual dataset to learn by. In this paper, we describe the design and implementation of a Microsoft Kinect-based open source software, called SignCol, for capturing and saving the gestures used in sign languages. Our work supports a multi-language database and reports the recorded items statistics. SignCol can capture and store colored(RGB) frames, depth frames, infrared frames, body index frames, coordinate mapped color-body frames, skeleton information of each frame and camera parameters simultaneously.
description: The paper is presented at ICSESS conference but the published version by them on the IEEE Xplore is impaired and the quality of figures is inappropriate!! This is the preprint version which had appropriate format and figures
Direito à informação e acesso ao conhecimento: Um novo desafio para as bibliotecas nacionais
Creators: name: Campos, Fernanda Maria
Publisher: name: Cadernos BAD
Year: 2003

description: Aborda-se a problemática do direito do cidadão à informação, consignada pela Sociedade da Informação e a missão que incumbe às bibliotecas no sentido de criação de um espaço global alargado que propicie o mais amplo acesso à informação. Apresentam-se, em torno de questões concretas, as linhas orientadoras da Comissão Europeia para a efectivação da criação de conteúdos na Internet, cruzando-as com as expectativas dos utilizadores – sobretud o em termos de liberdade e gratuitidade de acesso – e com as expectativas das próprias bibliotecas.
description: Cadernos BAD, N.º 1 (2002): Informação: um Direito de Cidadania
Direito de Acesso à Informação: Liberdade de Expressão - Fundamentação Filosófica
Creators: name: Vigário, Antonieta
Publisher: name: Cadernos BAD
Year: 2003

description: Apresenta-se a Ética do Discurso como a base filosófica para o diálogo entre os seres humanos. Fundamenta-se a Liberdade Intelectual na deontologia e não no utilitarismo.Expressa-se a relação fundamental entre Liberdade Intelectual e Diálogo.
description: Cadernos BAD, N.º 1 (2002): Informação: um Direito de Cidadania
Editorial
Creators: name: Henriques, Cecília
Publisher: name: Cadernos BAD
Year: 2003

description: O presente número dos Cadernos BAD inaugura uma nova etapa na história, já longa, da revista. Num espírito de renovação na continuidade, mantiveram-se algumas características de edições anteriores e introduziram-se as inovações consideradas necessárias para melhor cumprir os objectivos definidos para o sector editorial pelo actual CDN.Após uma breve experiência passada de edição dos Cadernos em CD-ROM, é retomado o suporte papel, por se concluir que cumpre melhor as expectativas do público-alvo. A inovação surge, neste domínio, com a disponibilização da revista no sítio web da Associação, ainda que com ligeiro desfasamento temporal relativamente à edição em papel.O novo grafismo é, porventura, o aspecto mais evidente da renovação: com ele se pretendeu integrar na revista a nova imagem da Associação e tornar mais apelativa a leitura. A manutenção do formato assegura uma certa continuidade formal.Os conteúdos apresentar-se-ão organizados em duas partes principais: a primeira proporá, em cada número, reflexões sobre um tema crítico no exercício da profissão; a segunda estará aberta à iniciativa de todos quantos queiram promover a troca de ideias, divulgação de estudos ou projectos que possam interessar à generalidade ou a grupos específicos de profissionais da informação. Desta forma se pretende concertar o interesse que os números monográficos oferecem, reunindo múltiplas perspectivas de uma mesma questão, com o objectivo de estimular a produção nacional de conteúdos, oferecendo um espaço permanentemente aberto à iniciativa individual.Continuando a ser nuclearmente uma revista de e para bibliotecários, arquivistas e documentalistas, procurará reforçar uma comunicação simétrica no seio desta comunidade específica e com outros domínios profissionais relacionados.Creio que este princípio, de tendencial inclusão de especialidades, está claramente reflectido no presente número. Com o destaque colocado na informação como direito da cidadania, traz à discussão uma temática central no exercício de qualquer profissional de informação e que o coloca em necessária interacção com terceiros, razão por que se procuraram colaborações fora do universo restrito dos profissionais BAD.Sem pretensões de exaustividade nas perspectivas possíveis de abordagem do tema, importa reconhecer que é aqui oferecido um significativo conjunto de artigos – a cujos autores agradeço a colaboração – para continuar uma reflexão sobre as implicações éticas, jurídicas, técnicas, tecnológicas, económicas e outras, do direito à informação.
description: Cadernos BAD, N.º 1 (2002): Informação: um Direito de Cidadania
Continuous Handling of Uncertainty in Food Chains: Using the House of Risk Model in Ecosystems
Creators: name: Engelseth, Per
name: Pujawan, I Nyoman
name: Ushada, Mirwan
name: Engelseth, Per
name: Pujawan, I Nyoman
name: Ushada, Mirwan
Publisher: name: Unknown
Year: 2018
Subjects: subject: Agribusiness
subject: Agricultural and Food Policy
subject: Agricultural Finance
subject: Ecosystems, House of Risk, Uncertainty, Complex systems, Supply Chain Management, Food chains

description: The house of risk model represents an approach to mitigate risk through systematically analysing data risk agents based on empirical findings through prioritizing them. Food production is associated with uncertainty both within the production system as well as in environment. Given the state of current technology, including its rapid development impacting on connectivity in supply chains, the house of risk model is considered through this conceptual study applying an ecosystems approach on how to mitigate risk in food chains in their many-faceted environmental setting. Ecosystems thinking is rooted in a normative quest to secure sustainability. It also is at the operations level a complex system. It is pointed out that an ecosystems approach encompasses mixed methods, including both deterministic and complex systems. The nature of this complementarity is discussed. The study provides a list of four issues regarding using the house of risk model within an ecosystem: (1) ethical, (2) development, (3) operations and (4) discourse.
Looking for the Charged Higgs Boson
Creators: name: Roy, D. P.
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: This review article starts with a brief introduction to the charged Higgs boson (H^\pm) in the Minimal Supersymmetric Standard Model (MSSM). It then discusses the prospects of a relatively light H^\pm boson search via top quark decay at Tevatron/LHC, and finally a heavy H^\pm boson search at LHC. The viable channels for H^\pm search are identified in both the cases, with particular emphasis on the H^\pm --> tau + nu decay channel. The effects of NLO QCD correction in the SM as well as the MSSM are discussed briefly.
description: 17 pages with 8 eps figures, Invited review, Reference added
Simultaneous estimation of multiple dairy technologies uptake
Creators: name: Deribe, Yared
name: Agajie Tesfaye
Publisher: name: figshare
Year: 2020
Subjects: subject: 70201 Animal Breeding
subject: FOS: Animal and dairy science
subject: 70203 Animal Management
subject: 70204 Animal Nutrition
subject: 70106 Farm Management, Rural Management and Agribusiness
subject: FOS: Other agricultural sciences
subject: 140201 Agricultural Economics
subject: FOS: Economics and business

description: To enhance the contribution of dairy to household food security, nutrition, and income, adoption of improved dairy breeds together with the component practices is indispensable.To study the adoption of the dairy technologies and the factors stimulating the choices, a cross-sectional household survey was conducted. As the joint multivariate probit estimation confirmed, there is complementarity and interdependence in the uptake of improved breeds, artificial insemination, concentrate feeds, and improved forages.
Leituras
Creators: name: Penteado, Pedro
name: Neves, Cristina
name: Runa, Lucília
name: Cabral, Maria Luísa
Publisher: name: Cadernos BAD
Year: 2003

description: SILVA, Armando B. Malheiro; RIBEIRO, Fernanda – Das "ciências" documentais à ciência da informação. Ensaio epistemológico para um novo modelo curricular. Porto: Afrontamento, 2002 KUHLTHAU, Carol – Como usar a biblioteca na escola: um programa de atividades para o ensino fundamental. Belo Horizonte: Autêntica Editora. 304 p. ISBN: 85-7546-039-1 BONAL ZAZO, José Luis; GENERELO LANASPA, Juan José; TRAVESÍ DE DIEGO, Carlos – Manual de descripción multinivel: propuesta de adaptación de las normas internacionales de descripción archivística. Salamanca: Junta de Castilla y Léon, 2000. 205 p. BUCHANAN, Sally A. – Prevenção contra desastres: instruções para formação em planeamento e recuperação. Trad. Maria Manuela Vieira C. Matos Correia e Maria Teresa do Vale de Matos. Lisboa: BAD, 2002. 70 p.
description: Cadernos BAD, N.º 1 (2003): Formar para informar
As Bibliotecas da Rede de Leitura Pública: problemas e perspectivas
Creators: name: Pires, Cláudia Casaca
Publisher: name: Cadernos BAD
Year: 2003

description: O artigo que se apresenta propõe uma reflexão sobre o panorama das bibliotecas municipais da rede de leitura pública. Nele são tomadas em consideração três áreas específicas de gestão bibliotecária, a saber, a informatização dos serviços, a cooperação inter-bibliotecária e a formação ao longo da vida dos recursos humanos. Neste sentido, procura-se através de cada uma destas variáveis de análise evidenciar problemas e propor novas metodologias de trabalho.
description: Cadernos BAD, N.º 1 (2003): Formar para informar
Spherical bias on the 3D reconstruction of the ICM density profile in galaxy clusters
Creators: name: Veronesi, I.
name: Bartalucci, I.
name: Rasia, E.
name: Molendi, S.
name: Balboni, M.
name: De Grandi, S.
name: Gastaldello, F.
name: Grillo, C.
name: Ghizzardi, S.
name: Lovisari, L.
name: Riva, G.
name: Rossetti, M.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: X-ray observations of galaxy clusters are routinely used to derive radial distributions of ICM thermdynamical properties such as density and temperature. However, observations allow us to access quantities projected on the celestial sphere only, so that an assumption on the 3D distribution of the ICM is necessary. Usually, spherical geometry is assumed. The aim of this paper is to determine the bias due to this approximation on the reconstruction of ICM density radial profile of a clusters sample and on the intrinsic scatter of the density profiles distribution, when clusters substructures are not masked. We used 98 simulated clusters for which we know the 3D ICM distribution drawn from The Three Hundred project. For each cluster we simulated 40 different observations by projecting the cluster along 40 different lines of sight. We extracted the ICM density profile from each observation assuming the ICM to be spherical distributed. For each line of sight we then considered the mean density profile over the sample and compared it with the 3D density profile given by the simulations. The spherical bias on the density profile is derived by considering the ratio between the observed and the input quantities. We also study the bias on the intrinsic scatter of the density profile distribution performing the same procedure. We find a bias on the density profile, $b_n$, smaller than $10\%$ for $R\lesssim R_{500}$ while it increases up to $\sim 50\%$ for larger radii. The bias on the intrinsic scatter profile, $b_s$, reaches a value of $\approx 100\%$ for $R\approx R_{500}$. The bias on both the analysed quantities strongly depends on the morphology of the objects: for clusters that do not show large scale substructures, both $b_n$ and $b_s$ are reduced by a factor 2, conversely for systems that do show large scale substructures both $b_n$ and $b_s$ increase significantly. [abridged]
description: Accepted for publication in A&A
Quasimolecular electronic structure of the trimer iridate Ba$_4$NbIr$_3$O$_{12}$
Creators: name: Magnaterra, M.
name: Sandberg, A.
name: Schilling, H.
name: Warzanowski, P.
name: Pätzold, L.
name: Bergamasco, E.
name: Sahle, Ch. J.
name: Detlefs, B.
name: Ruotsalainen, K.
name: Sala, M. Moretti
name: Monaco, G.
name: Becker, P.
name: Faure, Q.
name: Thakur, G. S.
name: Songvilay, M.
name: Felser, C.
name: van Loosdrecht, P. H. M.
name: Brink, J. van den
name: Hermanns, M.
name: Grüninger, M.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The insulating mixed-valent Ir$^{+3.66}$ compound Ba$_4$NbIr$_3$O$_{12}$ hosts two holes per Ir$_3$O$_{12}$ trimer unit. We address the electronic structure via resonant inelastic x-ray scattering (RIXS) at the Ir $L_3$ edge and exact diagonalization. The holes occupy quasimolecular orbitals that are delocalized over a trimer. This gives rise to a rich intra-$t_{2g}$ excitation spectrum that extends from 0.5 eV to energies larger than 2 eV. Furthermore, it yields a strong modulation of the RIXS intensity as a function of the transferred momentum q. A clear fingerprint of the quasimolecular trimer character is the observation of two modulation periods, $2π/d$ and $2π/2d$, where d and 2d denote the intratrimer Ir-Ir distances. We discuss how the specific modulation reflects the character of the wavefunction of an excited state. Our quantitative analysis shows that spin-orbit coupling $λ$ of about 0.4 eV is decisive for the character of the electronic states, despite a large hopping $t_{a_{1g}}$ of about 0.8 eV. The ground state of a single trimer is described very well by both holes occupying the bonding j=1/2 orbital, forming a vanishing quasimolecular moment with J=0.
description: 19 pages, 13 figures