cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Sécurité sanitaire et normes collectives de distributeurs : impact sur les filières et l'offre alimentaire
Creators: name: Fulponi, Linda
name: Giraud-Heraud, Eric
name: Hammoudi, Hakim
name: Valceschini, Egizio
name: Fulponi, Linda
name: Giraud-Heraud, Eric
name: Hammoudi, Hakim
name: Valceschini, Egizio
Publisher: name: Unknown
Year: 2006
Subjects: Food Consumption/Nutrition/Food Safety

description: On observe aujourd'hui une implication grandissante de la grande distribution dans les démarches de sécurisation des produits alimentaires. Quand elles sont le produit d'actions coordonnées entre plusieurs distributeurs, les normes rentrent plutôt dans le registre de relations inter-entreprises, en contraignant les transactions effectuées sur les marchés intermédiaires à satisfaire un cahier des charges préalablement choisi. Quand elles sont individuelles, ces initiatives contribuent à une meilleure différenciation par rapport à la concurrence et favorisent la valorisation sur les marchés. La question est alors d'évaluer l'impact de ces normes sur l'organisation économique des filières agro-alimentaires et de montrer comment elles peuvent effectivement contribuer à une amélioration globale de la sécurité sanitaire.
COVID19 & CDOs: A Homogenous Set of Attributes That Has Made Global Recession Duodecennial
Creators: name: Kaibalyapati Mishra
Publisher: name: figshare
Year: 2020
Subjects: subject: Economics
subject: 160512 Social Policy
subject: FOS: Political science

description: This article examines similar attributes possessed by the recession of 2008 and the global recession that is looming due to Corona crisis. It basically suggests that, these similarities can betaken up by policy makers to be put under consideration in order to avoid such global catastrophes in future.
title: Experimental investigation and velocity statistics in a Taylor-Couette facility
Creators: name: Amini Raoofpour, Reza
Publisher: name: TU Wien
Year: 2019
Subjects: subject: Taylor-Couette
subject: turbulence
subject: LDA

description: The flow between two rotating and concentric cylinders is defined as Taylor-Couette Flow. This configuration has been widely studied theoretically, numerically and experimentally because of its relative simplicity and for the implications it can bear in geophysical and industrial applications. In this work, we developed numerical tools to analyse the experimental data obtained via laser doppler anemometry technique. We performed experiments at low Reynolds number and investigated the regime transition. We analyzed the data in terms of both mean and time dependent quantities and we characterise the transition. In particular, we characterise the time-dependent flow by means of Fourier analysis. Data are processed with the codes developed in this work, which allowed an accurate comparison of the results obtained in correspondence of different Reynolds and Taylor numbers, i.e. different velocities. Data are processed with in house codes, which allowed an accurate comparison of the results obtained in correspondence of different Reynolds numbers, i.e. different velocities. Finally, we provide indications for future investigations with the aim of extending the regimes currently observed.
A novel approach for the synthesis of functionalized hydroxylamino derivative of dihydroquinazolinones
Creators: name: Chikkanti Jaganmohan
name: Vinay Kumar K., P.
name: Venkateshwarlu, R.
name: Mohanty, Sandeep
name: Jaydeep Kumar
name: Venkateswara Rao, B.
name: Akula Raghunadh
name: Krishnaji Tadiparthi
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Biophysics
subject: Biochemistry
subject: 29999 Physical Sciences not elsewhere classified
subject: FOS: Physical sciences
subject: Medicine
subject: Molecular Biology
subject: Biotechnology
subject: 111714 Mental Health
subject: FOS: Health sciences
subject: 110309 Infectious Diseases

description: A new metal-free and modular approach for the synthesis of various functionalized dihydroquinazolinones has been developed from isatoic anhydride, amines, 4-chloro-N-hydroxybenzimidoylchloride to yield up to 71%. The reaction has been screened in various bases, solvents at different temperatures. The substrate scope of the reaction has been studied with various amines and the possible reaction mechanism for this reaction has also been proposed.
title: Improvement of a Lagrangian approach for the multi-physical simulation of powder based additive manufacturing laser processes
Creators: name: Codina Álvarez, Francisco Javier
Publisher: name: TU Wien
Year: 2019
Subjects: subject: numerical simulation
subject: additive manufacturing
subject: VOF-LPT coupling

description: Among all the additive manufacturing technologies, metal powder based techniques become very suitable when coming to produce custom functional components of complex geometries within an unbeatable time. This technology is in development and some quality defects are still to be reduced, to achieve this goal a great understanding of the process is needed. Multiphysical simulations allow us to analyze the process without involving the huge cost of systematic experimental studies. OpenFOAM is an open-source simulation environment aimed for the solution of continuum mechanics problems, especially computational fluid dynamics (CFD), based on C++. It has been used by the Institute of production Engineering and Photonic Technologies of the TU Wien to develop during the last ten years a simulation software designed to acquire better knowledge of laser material processing. The Lagragian library is a very useful tool for the simulation of metal powder based techniques and thanks to its combination with the Finite-Volume approach some promisisng results have been obtained. Nevertheless, particles interaction implementation require a closer look, for this reason the coupling of discrete element methods (DEM) and volume of fluid (VOF) requires further work to improve the precision of the simulation results.
Dynamo action in sliding plates of anisotropic electrical conductivity
Creators: name: Alboussiere, Thierry
name: Drif, Kamel
name: Plunian, Franck
Publisher: name: arXiv
Year: 2020
Subjects: subject: Geophysics (physics.geo-ph)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: With materials of anisotropic electrical conductivity, it is possible to generate a dynamo with a simple velocity field, of the type precluded by Cowling's theorems with isotropic materials. Following a previous study by Ruderman and Ruzmaikin [1] who considered the dynamo effect induced by a uniform shear flow, we determine the conditions for the dynamo threshold when a solid plate is sliding over another one, both with anisotropic electrical conductivity. We obtain numerical solutions for a general class of anisotropy and obtain the conditions for the lowest magnetic Reynolds number, using a collocation Chebyshev method. In a particular geometry of anisotropy and wavenumber, we also derive an analytical solution, where the eigenvectors are just combinations of four exponential functions. An explicit analytical expression is obtained for the critical magnetic Reynold number. Above the critical magnetic Reynold number, we have also derived an analytical expression for the growth rate showing that this is a 'very fast' dynamo, extrapolating on the 'slow' and 'fast' terminology introduced by Vainshtein and Zeldovich [2].
description: 14 pages, 9 figures, 4 appendices
Green hydrogen as a key element for the decarbonisation of the transport sector on islands (WEBINAR 22/03/2021)
Creators: name: Suárez, Salvador
Publisher: name: Zenodo
Year: 2021

description: Presentation at the SOCLIMPACT webinar on 22/03/2021 Main topics: General aspects o hydrogen Hydrogen Economy Hydrogen in transport Experiences in the Canary Islands on the integration of renewables energies and hydrogen technologies. Hydrogen in the islands electrical context: The case of the Canary Islands
Ultrasound irradiation and green synthesized CuO-NiO-ZnO mixed metal oxide: An efficient sono/nano-catalytic system toward a regioselective synthesis of 1-aryl-5-amino-1H-tetrazoles
Creators: name: Monireh Atarod
name: Safari, Javad
name: Tebyanian, Hamid
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Biochemistry
subject: Space Science
subject: Medicine
subject: Molecular Biology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences

description: An efficient approach has been reported that 1-aryl-5-amino-1H-tetrazoles are prepared from structurally diverse N-arylcyanamides and sodium azide using sono/nano-catalytic system. The mixed metal oxide nanoparticles (NPs) (CuO, NiO, and ZnO NPs) were prepared with utilizing aqueous leaves extracts of the Rheum ribes. In this study, the effect of the reaction condition was investigated on the catalytic activity and selectivity of mixed metal oxide NPs for the synthesis of aminotetrazole derivatives. In this regard, various reaction conditions were precisely compared such as reflux and ultrasonication (US). In this study, the regioselective synthesis of 1-aryl-5-amino-1H-tetrazoles with high yield was achieved by the synergistic effect between US irradiation and prepared nanocatalyst which showed the potential of sono/nano-catalytic system in organic synthesis. Furthermore, the as-prepared nanocatalyst could be reused and recovered from the reaction mixture for several times without consequential abate in its catalytic activity and selectivity.
Near-infrared Census of RR Lyrae variables in the Messier 3 globular cluster and the Period--Luminosity Relations
Creators: name: Bhardwaj, Anupam
name: Rejkuba, Marina
name: de Grijs, Richard
name: Herczeg, Gregory J.
name: Singh, Harinder P.
name: Kanbur, Shashi
name: Ngeow, Chow-Choong
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present new near-infrared ($JHK_s$) time-series observations of RR Lyrae variables in the Messier 3 (NGC 5272) globular cluster using the WIRCam instrument at the 3.6-m Canada France Hawaii Telescope. Our observations cover a sky area of $\sim 21'\times 21'$ around the cluster center and provide an average of twenty epochs of homogeneous $JHK_s$-band photometry. New homogeneous photometry is used to estimate robust mean magnitudes for 175 fundamental-mode (RRab), 47 overtone-mode (RRc), and 11 mixed-mode (RRd) variables. Our sample of 233 RR Lyrae variables is the largest thus far obtained in a single cluster with time-resolved, multi-band near-infrared photometry. Near-infrared to optical amplitude ratios for RR Lyrae in Messier 3 exhibit a systematic increase moving from RRc to short-period ($P < 0.6$~days) and long-period ($P \gtrsim 0.6$~days) RRab variables. We derive $JHK_s$-band Period--Luminosity relations for RRab, RRc, and the combined sample of variables. Absolute calibrations based on the theoretically predicted Period--Luminosity--Metallicity relations for RR Lyrae stars yield a distance modulus, $μ= 15.041 \pm 0.017~(\textrm{statistical}) \pm 0.036~(\textrm{systematic})$~mag, to Messier 3. When anchored to trigonometric parallaxes for nearby RR Lyrae stars from the {\it Hubble Space Telescope} and the {\it Gaia} mission, our distance estimates are consistent with those resulting from the theoretical calibrations, albeit with relatively larger systematic uncertainties.
description: 22 pages, 14 figures, Accepted for publication in The Astronomical Journal
title: Silica Fault Mirror Development Along the Cordillera Blanca Detachment Fault, Peru
Creators: name: Chaudoir, Kayla Michelle
Publisher: name: Utah State University
Year: 2024

description: Earthquakes occur along planes of geologic weakness called faults. Thin, light-reflective surfaces on faults are called fault mirrors and often considered signatures of previous earthquakes along these faults. The Cordillera Blanca mountain range in the Peruvian Andes provides a natural laboratory to explore meter scale exposures of fault mirrors. Three naturally formed fault mirror samples were collected from the Cordillera Blanca detachment fault which runs along the edge of the Cordillera Blanca mountain range. Prior work on this fault reveals that it is capable of destructive earthquakes every few thousand years and is a significant earthquake hazard to the surrounding communities.
The goal of our investigation is to discover the textural and chemical properties of silica FMs and use that information to determine the deformation processes involved in their formation. Our results document multiple fault slip events, variations in grain size and a thin zone of no discernable grains directly below the fault mirror surface. Our chemical observations reveal the material the fault mirror has developed on is crystalline (quartz). This result differs from prior observations of silica fault mirrors which show they can develop on a non-crystalline to partially crystalline material. We suggest that if these fault mirrors formed during earthquake slip events, that the accommodation of slip within a small zone plays a role in propagating slip along the Cordillera Blanca detachment fault.
Effect of Ga$^{+}$ irradiation on magnetic and magnetotransport properties in (Ga,Mn)As epilayers
Creators: name: Kato, H.
name: Hamaya, K.
name: Kitamoto, Y.
name: Taniyama, T.
name: Munekata, H.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We report on the magnetic and magnetotransport properties of ferromagnetic semiconductor (Ga,Mn)As modified by Ga$^{+}$ ion irradiation using focused ion beam. A marked reduction in the conductivity and the Curie temperature is induced after the irradiation. Furthermore, an enhanced negative magnetoresistance (MR) and a change in the magnetization reversal process are also demonstrated at 4 K. Raman scattering spectra indicate a decrease in the concentration of hole carriers after the irradiation, and a possible origin of the change in the magnetic properties is discussed.
Roadmap for promotion of the distributed generation in the insular electrical systems of the Canary Islands (WEBINAR 22/03/2021)
Creators: name: Ruano, Santiago Díaz
Publisher: name: Zenodo
Year: 2021

description: Presentation at the SOCLIMPACT webinar on 22/03/2021 to the online community Main topics: Climate Change scenarios Impact Chains RES as a main mitigation plan Potential of PV self-consumption [Canary Islands] LIDAR –Building heights and obstacles to PV installation PV self-consumption: Slope estimation PV self-consumption: Azimuth orientation PV self-consumption: Energy balance PV self-consumption: Diagnosis results Energy storage solutions for Canary Islands Self-consumptionEnergy Storage Utility Scale Energy Storage Large-Scale Energy Storage Final Results
Constraints on neutrino mass in the scenario of vacuum energy interacting with cold dark matter after Planck 2018
Creators: name: Li, Hai-Li
name: Zhang, Jing-Fei
name: Zhang, Xin
Publisher: name: arXiv
Year: 2020
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In this work, we investigate the constraints on the total neutrino mass in the scenario of vacuum energy interacting with cold dark matter (abbreviated as I$Λ$CDM) by using the latest cosmological observations. We consider four typical interaction forms, i.e., $Q=βH ρ_{\rm de}$, $Q=βH ρ_{\rm c}$, $Q=βH_{0} ρ_{\rm de}$, and $Q=βH_{0} ρ_{\rm c}$, in the I$Λ$CDM scenario. To avoid the large-scale instability problem in interacting dark energy models, we employ the extended parameterized post-Friedmann method for interacting dark energy to calculate the perturbation evolution of dark energy in these models. The observational data used in this work include the cosmic microwave background (CMB) measurements from the Planck 2018 data release, the baryon acoustic oscillation (BAO) data, the type Ia supernovae (SN) observation (Pantheon compilation), and the 2019 local distance ladder measurement of the Hubble constant $H_{0}$ from the Hubble Space Telescope. We find that, compared with those in the $Λ$CDM+$\sum m_ν$ model, the constrains on $\sum m_ν$ are looser in the four I$Λ$CDM+$\sum m_ν$ models. When considering the three mass hierarchies of neutrinos, the constraints on $\sum m_ν$ are tightest in the degenerate hierarchy case and loosest in the inverted hierarchy case. In addition, in the four I$Λ$CDM+$\sum m_ν$ models, the values of coupling parameter $β$ are larger using the CMB+BAO+SN+$H_{0}$ data combination than that using the CMB+BAO+SN data combination, and $β>0$ is favored at more than 1$σ$ level when using CMB+BAO+SN+$H_{0}$ data combination. The issue of the $H_{0}$ tension is also discussed in this paper. We find that, compared with the $Λ$CDM+$\sum m_ν$ model, the $H_{0}$ tension can be alleviated in the I$Λ$CDM+$\sum m_ν$ model to some extent.
description: 13 pages, 7 figures
Innovations organisationnelles et contrôle de la qualité sanitaire dans la filière fruits et légumes
Creators: name: Bignebat, Celine
name: Codron, Jean-Marie
name: Bignebat, Celine
name: Codron, Jean-Marie
Publisher: name: Unknown
Year: 2006
Subjects: Food Consumption/Nutrition/Food Safety
Industrial Organization

description: Si la maîtrise de la qualité organoleptique et de la fraîcheur reste la cause principale de l'insatisfaction du consommateur, les distributeurs anticipent d'ores et déjà les effets que pourrait avoir une crise de confiance des consommateurs vis-à-vis de la qualité sanitaire des fruits et légumes frais. Des démarches de filière pour la mise en place de bonnes pratiques agricoles (BPA) et des dispositifs de contrôle des résidus de pesticides émergent. Dans le cas britannique, le rôle des distributeurs qui assument la totalité du risque sanitaire (pénal et commercial) est central. Dans le cas français, le risque sanitaire est partagé entre le premier metteur en marché (risque pénal) et le distributeur (risque commercial). Des dispositifs plus complexes sont à l'oeuvre. C'est le cas notamment des conventions collectives de contrôle négociées entre importateurs et pouvoirs publics.
The Orbit and Albedo of Transneptunian Binary 1997 CQ29
Creators: name: Noll, Keith S.
name: Stephens, Denise C.
name: Grundy, Will M.
name: Osip, David J.
name: Griffin, Ian
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We have measured the separations and position angles of the two components of the binary transneptunian object 1997 CQ29 at eight epochs. From these data we are able to constrain the orbit and mass of this binary system. The best fitting orbit has an orbital period of P = 312+/-3 days. The orbital eccentricity is e = 0.45+/-0.03 and the semimajor axis is a = 8,010+/-80 km. The mass of the system is surprisingly low at 0.42+/-0.02 x 10^18 kg. To account for the observed brightness consistent with the low mass and a range of plausible densities, the geometric albedo must be very high; for an assumed density of 1000 kg m^-3 we find a red geometric albedo of p_R = 0.37, an order of magnitude higher than has been generally assumed for transneptunian objects. If objects with comparably high albedos are common in the Kuiper belt, estimates of the mass of the belt must be significantly reduced. The semimajor axis of 1997 CQ29's orbit is 2.8% of the Hill radius of the primary, a value strikingly similar to this same ratio in other transneptunian binaries, main-belt binaries, and regular satellite systems.
description: accepted for publication in the Astronomical Journal, November 2004 18 pages, 5 figuers
Resummations, Power Corrections and Interjet Radiation
Creators: name: Sterman, George
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Resummation in QCD provides insight into the evolution of final state jets from short to long distances, and of accompanying interjet radiation. Applications to event shapes, including the recently-proposed angularities, suggest experimental tests of the interrelations between weak- and strong-coupling dynamics.
description: 10 pages, 4 eps figures, LaTeX. Submitted to proceedings of the XXXIV International Symposium on Multiparticle Dynamics, July 26 - August 1, 2004, Sonoma State University, Sonoma County, California
Writing Pacific Life Stories: Why It's Important
Creators: name: Spark, Ceridwen
name: Ritchie, Jonathon
name: Corbett, Jack
Publisher: name: Canberra, ACT : Coral Bell School of Asia Pacific Affairs, College of Asia and the Pacific, The Australian National University
Year: 2013

description: The authors highlight why life writing is an important area of research, particularly for the Pacific region. This In Brief is written in advance of a workshop on life writing which takes place at the Pacific Adventist University, from 9 - 10 December, 2013.
Developing a Semi-automatic Annotation Workflow for Historical Toponyms: Challenges and Insights from the Itinera Nova Project
Creators: name: Löbbert, Benedikte
name: Drach, Sviatoslav
name: Neuefeind, Claes
Publisher: name: Zenodo
Year: 2025

description: In this poster, we present a workflow for the semi-automatic annotation of toponyms, currently under development in the project Itinera Nova. Itinera Nova is a Citizen Science project that aims to digitize and transcribe the aldermen's registers and account books from the city archive Leuven and to make them accessible for the general public. The registers and account books comprise a total of over 1,300,000 pages from the period 1362-1795. We will pick up on the challenges with historical place names and discuss the insights we've won during the development.
Brownian motion with killing and reflection and the "hot--spots" problem
Creators: name: Banuelos, Rodrigo
name: Pang, Michael
name: Pascu, Mihai
Publisher: name: arXiv
Year: 2004
Subjects: subject: Probability (math.PR)
subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: We investigate the "hot--spots" property for the survival time probability of Brownian motion with killing and reflection in planar convex domains whose boundary consists of two curves, one of which is an arc of a circle, intersecting at acute angles. This leads to the "hot--spots" property for the mixed Dirichlet--Neumann eigenvalue problem in the domain with Neumann conditions on one of the curves and Dirichlet conditions on the other
Solo drumming in the Puerto Rican bomba : an analysis of musical processes and improvisational strategies
Creators: name: Ferreras, Salvador E.
Publisher: name: University of British Columbia
Year: 2009

description: For over two hundred years, the drumming, dancing and singing of the bomba genre have maintained a vital presence among Puerto Ricans. Bomba reflects a syncretism of African and European musical concepts that have, over the past fifty years, experienced a renaissance and a socio-musical redefinition that have forged a unique contemporary musical culture. Drumming improvisation, a core musical element of bomba tradition, has never been analyzed in a manner that defines the relationship of phrases to rhythmic structure or that articulates its continual dialogue with an evolving tradition. This study will examine how many of the genre's foundational syncretic elements and techniques evolve in daily practice. The research undertaken over the past four years involved interviews, intensive fieldwork, participant-observation, historical research, and cross-disciplinary studies. The dissertation begins with historical accounts of bomba and then proceeds to surveys of prior research, identification of important communities, and the establishment of a classification of musical styles, sub-styles and processes. This data informs the analysis of six drum solos drawn from the principal styles and sub-styles that are the central concern of this study. These analyses propose that drumming improvisation in bomba reveals how precise musical processes equip the soloist with specific musicalnavigational tools while allowing for spontaneous inspirational moments. The transcriptions give a concise picture of the techniques at play, revealing how rhythmic cells and phrases relate to tradition, experimentation and innovation. Improvisation in bomba involves a complex network of incoming stimuli that encompasses, among other things, dance steps, song texts, non-musical influences and the diverse expectations of any given audience. Bomba soloing exhibits characteristics that are best examined through intercultural, cross-disciplinary studies of improvisational practice. Nationalism, identity politics, and an underlying racial ambiguity surface as important factors in bomba's renewal. Their relation to the processes mentioned earlier completes a portrait of the evolution of a musical genre deeply rooted in Puerto Rican society.
Generation of entanglement in regular systems
Creators: name: Znidaric, Marko
name: Prosen, Tomaz
Publisher: name: arXiv
Year: 2004
Subjects: subject: Quantum Physics (quant-ph)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: We study dynamical generation of entanglement in bipartite quantum systems, characterized by purity (or linear entropy), and caused by the coupling between the two subsystems. Explicit semiclassical theory of purity decay is derived for integrable classical dynamics of the uncoupled system, and for localized (general Gaussian wave-packet) initial states. Purity decays as an algebraic function of time times strength of perturbation, independently of the Planck's constant.
description: 4 pages, 3 figures
L'impact économique des innovations agricoles : l'arbitrage entre hybrides et lignées dans le secteur des semences
Creators: name: Ambec, Stefan
name: Lemarie, Stephane
name: Ambec, Stefan
name: Lemarie, Stephane
Publisher: name: Unknown
Year: 2006
Subjects: Agribusiness
Research and Development/Tech Change/Emerging Technologies

description: Les innovations dans le domaine des semences de grandes cultures sont issues pour l'essentiel de recherches privées. Les entreprises semencières peuvent s'approprier une part plus importante des bénéfices économiques liés à l'innovation en choisissant de créer des semences hybrides plutôt que des semences lignées. Néanmoins, ce choix technologique a aussi un impact en termes d'efficacité puisque les coûts de production sont différents selon le type de semence. Ce texte résume un travail de recherche dans lequel nous montrons que le choix technologique des entreprises peut dans certains cas conduire à une perte du point de vue économique. Nous montrons également que cette perte peut être limitée par la mise en place d'une taxe sur les semences fermières produites à partir de semences lignées, taxe appelée contribution volontaire obligatoire (COV) dans le cas du blé en France.
A technical note on a compact inert-gas suitcase for optical measurements of air-sensitive 2D materials
Creators: name: Tirion, Sjors
name: Cheng, Zhiyuan
name: Pen, Christiaan
name: Galli, Federica
name: Hesselberth, Marcel
name: Bhattacharyya, Semonti
Publisher: name: Zenodo
Year: 2024
Subjects: subject: Condensed matter physics
subject: Bulk nanostructured materials
subject: Materials engineering
subject: FOS: Materials engineering
subject: nanomaterials

description: We have designed and manufactured a low-cost, easy-to-use, inert-gas atmosphere over-pressurized compact suitcase for storing air-sensitive 2D materials or any other air-sensitive samples, as well as performing optical microscopy, Raman, and photoluminescence measurements. We demonstrate that the leaking rate of this suitcase is 1e-7 mbar.l/s, a low enough rate to protect an air-sensitive sample stored inside for at least 4.5 days. With Raman microscopy measurements, we further demonstrate that our inert-gas suitcase can protect Cr2Ge2Te3, a well-known air-sensitive 2D material for at least 8 days from degradation. In this technical note we share the details, operation and testing of this suitcase. We have also included the technical designs and the autodesk designs so that this design can be replicated by others who need such a system.
Rigorous derivation of coherent resonant tunneling time and velocity in finite periodic systems
Creators: name: Pacher, C.
name: Boxleitner, W.
name: Gornik, E.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The velocity $v_{res}$ of resonant tunneling electrons in finite periodic structures is analytically calculated in two ways. The first method is based on the fact that a transmission of unity leads to a coincidence of all still competing tunneling time definitions. Thus, having an indisputable resonant tunneling time $τ_{res},$ we apply the natural definition $v_{res}=L/τ_{res}$ to calculate the velocity. For the second method we combine Bloch's theorem with the transfer matrix approach to decompose the wave function into two Bloch waves. Then the expectation value of the velocity is calculated. Both different approaches lead to the same result, showing their physical equivalence. The obtained resonant tunneling velocity $v_{res}$ is smaller or equal to the group velocity times the magnitude of the complex transmission amplitude of the unit cell. Only at energies where the unit cell of the periodic structure has a transmission of unity $v_{res}$ equals the group velocity. Numerical calculations for a GaAs/AlGaAs superlattice are performed. For typical parameters the resonant velocity is below one third of the group velocity.
description: 12 pages, 3 figures, LaTeX
Mudança na produtividade dos fatores de produção da cafeicultura nas principais regiões produtoras do Brasil
Creators: name: Gomes, Marília F. Maciel
name: Rosado, Patrícia Lopes
name: Gomes, Marília F. Maciel
name: Rosado, Patrícia Lopes
Publisher: name: Unknown
Year: 2005
Subjects: subject: Agribusiness
subject: Cost
subject: translog
subject: Allen elasticity of substitution
subject: coffee
subject: Custo
subject: elasticidade de substituição de Allen
subject: café

description: This paper aimed to study the production behavior of the coffee production and the existing relationships in the factor markets in the States of Minas Gerais and São Paulo, during the period from 1975 to 2001. Specifically, it is evaluated the sensitiveness of the input use in response to price changes, as well as the interdependence with the produc-tion factor market. For that, the Allen elasticity of substitution approach was used. The input and labor expenditures presented the highest share of the average operational production costs in Minas Gerais and São Paulo. With respect to the substitutability/complementarity among the production factors in the Minas Gerais State, the result suggested that there was a complementarity relationship between land rent and machinery opera-tions; land and labor; machinery and input uses, and a substitutability relationship among the other production factors. On the other hand, for the São Paulo State, it was observed that the variables land rent and labor had been complementary, and the other pairs were substitute factors.....Neste trabalho, estudam-se a transformação no comportamento produtivo da cafeicultura e as relações existentes no mercado de fatores nos Estados de Minas Gerais e São Paulo, no período de 1975 a 2001. Especificamente, avalia-se a sensibilidade do uso dos insumos a alterações nos preços, assim como a interdependência no mercado dos fatores produtivos. Para tanto, utilizou-se a elasticidade de substituição de Allen. As despesas com insumos e mão-de-obra apresentaram as maiores parcelas dos custos operacionais unitários de produção em Minas Gerais e São Paulo. Em relação à substitutibilidade/complementaridade entre os fatores em Minas Gerais, nota-se que havia relação de complementaridade entre aluguel da terra e operações com máquinas, terra e mão-de-obra, e entre máquinas e insumos, e relação de substitutibilidade entre os demais fatores. Já no Estado de São Paulo, observa-se que os fatores aluguel da terra e mão-de-obra foram complementares e os demais substitutos entre si.
Generic transport formula for a system driven by Markovian reservoirs
Creators: name: Jin, Tony
name: Filippone, Michele
name: Giamarchi, Thierry
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We present a generic, compact formula for the current flowing in interacting and non-interacting systems which are driven out-of-equilibrium by biased reservoirs described by Lindblad jump operators. We show that, in the limit of high temperature and chemical potential, our formula is equivalent to the well-known Meir-Wingreen formula, which describes the current flowing through a system connected to fermionic baths, therefore bridging the gap between the two formalisms. Our formulation gives a systematic way to address the transport properties of correlated systems strongly driven out of equilibrium. As an illustration, we provide explicit calculations of the current in three cases : {\it i)} a single-site impurity {\it ii)} a free fermionic chain {\it iii)} a fermionic chain with loss/gain terms along the chain. In this last case, we find that the current across the system has the same behavior for loss or gain terms and depends on the loss/gain rate in a non-monotonic way.
description: 14 pages, 6 figures
Joint Detection and Tracking in Videos with Identification Features
Creators: name: Munjal, Bharti
name: Aftab, Abdul Rafey
name: Amin, Sikandar
name: Brandlmaier, Meltem D.
name: Tombari, Federico
name: Galasso, Fabio
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Recent works have shown that combining object detection and tracking tasks, in the case of video data, results in higher performance for both tasks, but they require a high frame-rate as a strict requirement for performance. This is assumption is often violated in real-world applications, when models run on embedded devices, often at only a few frames per second. Videos at low frame-rate suffer from large object displacements. Here re-identification features may support to match large-displaced object detections, but current joint detection and re-identification formulations degrade the detector performance, as these two are contrasting tasks. In the real-world application having separate detector and re-id models is often not feasible, as both the memory and runtime effectively double. Towards robust long-term tracking applicable to reduced-computational-power devices, we propose the first joint optimization of detection, tracking and re-identification features for videos. Notably, our joint optimization maintains the detector performance, a typical multi-task challenge. At inference time, we leverage detections for tracking (tracking-by-detection) when the objects are visible, detectable and slowly moving in the image. We leverage instead re-identification features to match objects which disappeared (e.g. due to occlusion) for several frames or were not tracked due to fast motion (or low-frame-rate videos). Our proposed method reaches the state-of-the-art on MOT, it ranks 1st in the UA-DETRAC'18 tracking challenge among online trackers, and 3rd overall.
description: Accepted at Image and Vision Computing Journal
title: Cyclical Patterns of Self-Regulated Learning in College Students
Creators: name: Longhurst, David N.
Publisher: name: Utah State University
Year: 2024

description: Zimmerman’s self-regulated learning (SRL) model is a cyclical approach to learning where learners use several processes to facilitate learning or to perform a skill within many domains. Zimmerman’s model describes three phases including forethought, performance, and self-reflection, which occur respectively before, during, and after a task. Theoretically, these phases interact in a cyclical feedback loop in which a person cognitively interacts with a task before, during, and after the activity and continuously do so independently. This model has been the basis for several school-based intervention programs. Those programs have been studied regarding academic outcomes and efficacy; however, less research has empirically tested the theoretical cyclical connections among subprocesses within the three phases of Zimmerman’s model. This dissertation’s objective was to examine college students’ SRL processes (i.e., goal-setting, strategic planning, self-efficacy, interest, task-value, satisfaction, and attributions) in relation to a quiz through an online SRL microanalysis survey. A secondary objective was to examine the relationships within the self-reflection phase and the forethought phases independently as opposed to across phases. This information may help future researchers and clinicians to better understand connections and disconnections of learning processes within SRL for college students. Consequently, such information could lead to adaptations of SRL interventions that can help the learner achieve mastery towards their task of interest.
Trabalho rural e saúde: intoxicações por agrotóxicos no município de Teresópolis - RJ
Creators: name: Soares, Wagner Lopes
name: Freitas, Elpídio Antônio Venturine De
name: Coutinho, José Aldo Gonçalves
name: Soares, Wagner Lopes
name: Freitas, Elpídio Antônio Venturine De
name: Coutinho, José Aldo Gonçalves
Publisher: name: Unknown
Year: 2005
Subjects: subject: Agribusiness
subject: Pesticide intoxication
subject: logistical regression
subject: rural work
subject: factor risk
subject: agrotóxicos
subject: intoxicação por agrotóxicos
subject: regressão logística
subject: trabalho rural
subject: fatores de risco

description: In this article, we analyze the characteristics of rural work in Teresópolis, focusing on the associations between pesticides use indica-tors. We intend to subsidize discussions about the legislation on pesti-cide use. Data includes personal and farms characteristics, pesticides and intoxication variables collected through questionnaires applied in an IBGE research conducted in Teresópolis municipality – RJ. Through exploratory data analysis and logistical regression, it was possible to find risk and protection factors related to pesticide intoxication. The pa-per highlights the need to create regulatory policies, to minimize risk and maximize protection factors related with rural workers health.....Este estudo procura avaliar as características do trabalho rural no município de Teresópolis, procurando encontrar associações entre variáveis que indicam o uso indevido de agrotóxicos e a intoxicação por esse tipo de produto entre aplicadores de agrotóxicos. Adicionalmente, pretende-se criar subsídios à discussão das práticas de regulação ao uso desses produtos. Os dados foram obtidos de uma pesquisa realizada pelo Instituto Brasileiro de Geografia e Estatística (IBGE), que aplicou, em Teresópolis – RJ, questionários que contemplavam variáveis de características pessoais, do estabelecimento, do uso de agrotóxicos e de intoxicação por esses produtos. Através de análise exploratória dos dados e de uma regressão logística foi possível encontrar fatores de risco e de proteção relacionados à saúde dos trabalhadores, no que diz respeito à intoxicação por uso de agrotóxicos. Tal fato aponta para urgentes compromissos no sentido de criar políticas de regulação capazes de reduzir essas características de risco, bem como de ampliar os fatores de proteção à saúde dos trabalhadores rurais.
Electromagnetically induced absorption and transparency in magneto-optical resonances in elliptically polarized field
Creators: name: Brazhnikov, D. V.
name: Taichenachev, A. V.
name: Tumaikin, A. M.
name: Yudin, V. I.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Quantum Physics (quant-ph)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: Using a 1 to 2 transition as an analytically tractable model, we discuss in detail magneto-optical resonances of both EIA (electromagnetically induced absorption) and EIT (electromagnetically induced transparency) types in the Hanle configuration. The analysis is made for arbitrary rate of depolarizing collisions in the excited state and arbitrary elliptical field polarization. The obtained results clearly show that the main reason for the EIA sub-natural resonance is the spontaneous transfer of anisotropy from the excited level to the ground one. In the EIA case we predict the negative structures in the absortpion resonance at large field detuning. The role of the finite atom-light interaction time is briefly discussed. In addition we study non-trivial peculiarities of the resonance lineshape related to the velocity spread in a gas.
description: version #2; revtex 4; 27 pages, 6 eps figures
Adaptive Boolean Networks and Minority Games with Time--Dependent Capacities
Creators: name: Galstyan, Aram
name: Lerman, Kristina
Publisher: name: arXiv
Year: 2004
Subjects: subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: Cellular Automata and Lattice Gases (nlin.CG)
subject: FOS: Physical sciences

description: In this paper we consider a network of boolean agents that compete for a limited resource. The agents play the so called Generalized Minority Game where the capacity level is allowed to vary externally. We study the properties of such a system for different values of the mean connectivity $K$ of the network, and show that the system with K=2 shows a high degree of coordination for relatively large variations of the capacity level.
description: 4 pages, 4 figures
Efeitos do acordo entre o Mercosul e a União Européia sobre os mercados de grãos
Creators: name: Alvim, Augusto Mussi
name: Waquil, Paulo D.
name: Alvim, Augusto Mussi
name: Waquil, Paulo D.
Publisher: name: Unknown
Year: 2005
Subjects: subject: Agribusiness
subject: Mercosur
subject: regional integration
subject: grains
subject: Mercosul
subject: integração regional
subject: grãos

description: This study aims to measure the effects of an agreement betwe-en Mercosur and the European Union (EU) on production, consumption and trade flows of rice, maize, soybeans and wheat in several regions. To estimate the effects of this agreement we used a spatial allo-cation model presented as a Mixed Complementarity Problem. As a result, we identify the variations in Producer’s Surplus for the scenarios Mercosur-EU and Mercosur-extended EU, considering the elimination of tariff barriers and/or subsidies. In general, the highest gains for grain producers in the Mercosur countries happen in the Mercosur-EU scenario with the elimination of subsidies by the European countries. However, we emphasize that total gains for the Mercosur countries are positive, but the wheat sector shows significant losses in this scenario.....Este estudo busca mensurar os efeitos do acordo entre o Mercosul e a União Européia (UE) sobre a produção, consumo e fluxos comerciais de arroz, milho, soja e trigo nas diversas regiões analisadas. Para avaliar os efeitos deste acordo utilizamos um modelo de alocação espacial apresentado como um Problema de Complementaridade Mista (PCM). Como resultado, o presente estudo identifica as variações no Excedente do Produtor (EP) nos cenários Mercosul-UE e Mercosul-UE ampliada considerando a eliminação das barreiras tarifárias e/ou subsídios. Em termos gerais, os maiores ganhos para os produtores de grãos dos países do Mercosul ocorrem no cenário Mercosul-UE com eliminação dos subsídios por parte dos países da UE. No entanto, salienta-se que, embora os ganhos totais para os países do Mercosul sejam positivos, o setor tritícola apresenta perdas significativas neste cenário.
2. The Great Margin - The Great Margin Website [Curatorial Output]
Creators: name: Bambo Soyinka
Publisher: name: BathSPAdata
Year: 2021
Subjects: subject: 190499 Performing Arts and Creative Writing not elsewhere classified
subject: FOS: Arts (arts, history of arts, performing arts, music)
subject: 210299 Curatorial and Related Studies not elsewhere classified
subject: FOS: Media and communications
subject: 200199 Communication and Media Studies not elsewhere classified
subject: 130201 Creative Arts, Media and Communication Curriculum and Pedagogy
subject: FOS: Educational sciences

description: The material referenced in this item is located externally at the above linked website, and can be viewed in full by accessing via the provided link.

Stemming from research led by Soyinka since 2016, this research ​addressed a lack of inclusive models for collaborative writing. It engaged with a growing body of research seeking to foster empathy and equality within the arts. The summative output,​ The Great Margin,​ is a curatorial project underpinned by two new pedagogical resources: ​Dare to Write? and ​The​ ​Writer’s Cycle.
This item contains the link to the website, which is the output. The site documents both the films collections, Bulletins from the Edge and I Even Dream in Haiku, and includes the Field Notes and Conversations sections. 
Majorana bound states and zero-bias conductance peaks in superconductor/semiconductor nanowire devices
Creators: name: Kobiałka, Aksel
name: Ptok, Andrzej
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Theoretical research suggests a emergence of the Majorana bound states at the ends of the nanowires. Experimental verifications of said concept has already been executed, e.g., in superconductor/semiconductor nanowire devices where interplay between superconducting gap, spin-orbit coupling and external magnetic field allows for creation of zero-energy bound states. Recent experiments propose a topological phase diagram by local modification of the effective chemical potential. We discuss this possibility, using a model of experimental system in form of semi-infinite S/N junction. We calculate the zero--bias differential conductance $G$ in the case of the homogeneous system, as well as in the presence of the gate voltage. Relation between conductance and the effective gap in the system is investigated. We show that $G$ can reproduce the topological phase diagram in magnetic field vs. gate voltage space of parameters.
description: 4 figures