cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Fundamental diagrams in traffic flow: the case of heterogeneous kinetic models
Creators: name: Puppo, Gabriella
name: Semplice, Matteo
name: Tosin, Andrea
name: Visconti, Giuseppe
Publisher: name: arXiv
Year: 2014
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics
subject: 76P05, 65Z05, 90B20

description: Experimental studies on vehicular traffic provide data on quantities like density, flux, and mean speed of the vehicles. However, the diagrams relating these variables (the fundamental and speed diagrams) show some peculiarities not yet fully reproduced nor explained by mathematical models. In this paper, resting on the methods of kinetic theory, we introduce a new traffic model which takes into account the heterogeneous nature of the flow of vehicles along a road. In more detail, the model considers traffic as a mixture of two or more populations of vehicles (e.g., cars and trucks) with different microscopic characteristics, in particular different lengths and/or maximum speeds. With this approach we gain some insights into the scattering of the data in the regime of congested traffic clearly shown by actual measurements.
description: 26 pages, 11 figures
Three-dimensional strain states and crystallographic domain structures of epitaxial colossal magnetoresistive La0.8Ca0.2MnO3 thin films
Creators: name: Eom, C.B.
name: Tsui, F.
name: Rao, R.A.
name: Lavric, D.
name: Nath, T.K.
name: Wu, L.
Publisher: name: American Institute of Physics Inc.
Year: 1998

description: The evolution of three-dimensional strain states and crystallographic domain structures of epitaxial colossal magnetoresistive La0.8Ca0.2MnO3 films have been studied as a function of film thickness and lattice mismatch with two types of (001) substrates, SrTiO3 and LaAlO3. In-plane and out-of-plane lattice parameters and strain states of the films were measured directly using normal and grazing incidence x-ray diffraction techniques. The unit cell volume of the films is not conserved, and it exhibits a substrate-dependent variation with film thickness. Films grown on SrTiO3 substrates with thickness up to ∼250 Å are strained coherently with a pure (001)T orientation normal to the surface. In contrast, films as thin as 100 Å grown on LaAlO3 show partial relaxation with a (110)T texture. While thinner films have smoother surfaces and higher crystalline quality, strain relaxation in thicker films leads to mixed (001)T and (110)T textures, mosaic spread, and surface roughening. The magnetic and electrical transport properties, particularly Curie and peak resistivity temperatures, also show systematic variations with respect to film thickness.
A geometrical model for the Monte Carlo simulation of the TrueBeam linac
Creators: name: Rodriguez, Miguel
name: Sempau, Josep
name: Fogliata, Antonella
name: Cozzi, Luca
name: Sauerwein, Wolfgang
name: Brualla, Lorenzo
Publisher: name: arXiv
Year: 2015
Subjects: subject: Medical Physics (physics.med-ph)
subject: FOS: Physical sciences

description: Monte Carlo (MC) simulation of linacs depends on the accurate geometrical description of the head. The geometry of the Varian TrueBeam (TB) linac is not available to researchers. Instead, the company distributes phase-space files (PSFs) of the flattening-filter-free (FFF) beams tallied upstream the jaws. Yet, MC simulations based on third party tallied PSFs are subject to limitations. We present an experimentally-based geometry developed for the simulation of the FFF beams of the TB linac. The upper part of the TB linac was modeled modifying the Clinac 2100 geometry. The most important modification is the replacement of the standard flattening filters by ad hoc thin filters which were modeled by comparing dose measurements and simulations. The experimental dose profiles for the 6MV and 10MV FFF beams were obtained from the Varian Golden Data Set and from in-house measurements for radiation fields ranging from 3X3 to 40X40 cm2. Indicators of agreement between the experimental data and the simulation results obtained with the proposed geometrical model were the dose differences, the root-mean-square error and the gamma index. The same comparisons were done for dose profiles obtained from MC simulations using the second generation of PSFs distributed by Varian for the TB linac. Results of comparisons show a good agreement of the dose for the ansatz geometry similar to that obtained for the simulations with the TB PSFs for all fields considered, except for the 40X40 cm2 field where the ansatz geometry was able to reproduce the measured dose more accurately. Our approach makes possible to: (i) adapt the initial beam parameters to match measured dose profiles; (ii) reduce the statistical uncertainty to arbitrarily low values; and (iii) assess systematic uncertainties by employing different MC codes.
MosaicExplorerJ F1000Research article extended data
Creators: name: Tosi, Sébastien
name: Bardia, Lídia
name: Colombelli, Julien
name: Barallobre, Maria Jose
name: Arrate Muñoz-Barrutia
name: Soto-Montenegro, María Luisa
Publisher: name: Zenodo
Year: 2020
Subjects: light sheet microscopy, image stitching, 3D tiles, software, bioimage analysis

description: Extended Data for MosaicExplorerJ: Interactive Stitching of Terabyte-size Tiled Datasets from Lightsheet Microscopy
Heat conduction of (111) Co/Cu superlattices
Creators: name: Wellman, J.
name: Chen, B.
name: Tsui, F.
name: Uher, C.
name: Clarke, R.
Publisher: name: American Institute of Physics Inc.
Year: 1997

description: We report the observation of a large negative magnetothermal resistance in (111) Co/Cu superlattices grown by molecular beam epitaxy (MBE) techniques. The observed field dependence is proportional to that of the electrical resistance, in accordance with the Wiedemann-Franz law. The Lorentz number deduced from the measurements is (2.7±0.3)×10-8 V2/K2. The magnetothermopower also shows a similar correlation with resistivity. These findings reveal that large-angle elastic scattering of conduction electrons, arising from a spin-dependent density of states at the Fermi level, is the dominant process responsible for the observed large magnetotransport effects. In zero field, both electrons and phonons contribute to the thermal conduction of the MBE-grown Co/Cu system, at a ratio of about 1:2 near 300 K becoming nearly equal below 150 K.
Semiclassical pair production rate for rotating electric fields
Creators: name: Strobel, Eckhard
name: Xue, She-Sheng
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We semiclassically investigate Schwinger pair production for pulsed rotating electric fields depending on time. To do so we solve the Dirac equation for two-component fields in a WKB-like approximation. The result shows that for two-component fields the spin distribution of produced pairs is generally not $1:1$. As a result the pair creation rates of spinor and scalar quantum electro dynamics (QED) are different even for one pair of turning points. For rotating electric fields the pair creation rate is dominated by particles with a specific spin depending on the sense of rotation for a certain range of pulse lengths and frequencies. We present an analytical solution for the momentum spectrum of the constant rotating field. We find interference effects not only in the momentum spectrum but also in the total particle number of rotating electric fields.
description: 11 pages, 3 figures V2: investigation of second parameter range and references added, correction of some minor typos, final version to appear in Phys. Rev. D
Magnetothermal conductivity of Ba1-xKxBiO3 crystals
Creators: name: Payne, D.A.
name: Rao, K.V.
name: Tsui, F.
name: Chen, B.
name: Uher, C.
name: Han, P.D.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 1995

description: We have investigated the thermal conductivity of single-crystal Ba1-xKxBiO3 (BKBO). The measured temperature and field dependences reveal that both electrons and phonons contribute to the thermal conduction of BKBO in both the normal and the superconducting states, and that the phonon mean free path can be manipulated by potassium doping concentration. The potassium-underdoped samples exhibit a suppression of phonon diffusivity, and consequently a more pronounced electronic contribution, indicating that the statistical fluctuation of potassium concentration may lead to an increase of defect density. The field-dependent thermal conductivity of BKBO in the superconducting state exhibits scaling behavior, which indicates the presence of an unconventional superconducting gap.
Searches for supersymmetry using the MT2 variable in hadronic events produced in pp collisions at 8 TeV
Creators: name: CMS Collaboration
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Searches for supersymmetry (SUSY) are performed using a sample of hadronic events produced in 8 TeV pp collisions at the CERN LHC. The searches are based on the MT2 variable, which is a measure of the transverse momentum imbalance in an event. The data were collected with the CMS detector and correspond to an integrated luminosity of 19.5 inverse femtobarns. Two related searches are performed. The first is an inclusive search based on signal regions defined by the value of the MT2 variable, the hadronic energy in the event, the jet multiplicity, and the number of jets identified as originating from bottom quarks. The second is a search for a mass peak corresponding to a Higgs boson decaying to a bottom quark-antiquark pair, where the Higgs boson is produced as a decay product of a SUSY particle. For both searches, the principal backgrounds are evaluated with data control samples. No significant excess over the expected number of background events is observed, and exclusion limits on various SUSY models are derived.
description: Replaced with published version. Added journal reference and DOI
Charmonium Spectroscopy in Strong Magnetic Fields by QCD Sum Rules: S-Wave Ground States
Creators: name: Cho, Sungtae
name: Hattori, Koichi
name: Lee, Su Houng
name: Morita, Kenji
name: Ozaki, Sho
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Lattice (hep-lat)
subject: Nuclear Experiment (nucl-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We investigate quarkonium mass spectra in external constant magnetic fields by using QCD sum rules. We first discuss a general framework of QCD sum rules necessary for properly extracting meson spectra from current correlators computed in the presence of strong magnetic fields, that is, a consistent treatment of mixing effects caused in the mesonic degrees of freedom. We then implement operator product expansions for pseudoscalar and vector heavy-quark current correlators by taking into account external constant magnetic fields as operators, and obtain mass shifts of the lowest-lying bound states $η_c$ and $J/ψ$ in the static limit with their vanishing spatial momenta. Comparing results from QCD sum rules with those from hadronic effective theories, we find that the dominant origin of mass shifts comes from a mixing between $η_c$ and $J/ψ$ with a longitudinal spin polarization, accompanied by other subdominant effects such as mixing with higher excited states and continua.
description: 24 pages, 12 figures. Comments inserted in the last paragraph of Sec. II; One reference added; Published in PRD; Title slightly changed upon request by PRD
Condensed phase of Bose-Fermi mixtures with a pairing interaction
Creators: name: Guidini, Andrea
name: Bertaina, Gianluca
name: Galli, Davide Emilio
name: Pieri, Pierbiagio
Publisher: name: arXiv
Year: 2014
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We study the condensed phase of a Bose-Fermi mixture with a tunable pairing interaction between bosons and fermions with many-body diagrammatic methods and fixed-node diffusion Quantum Monte Carlo simulations. A universal behavior of the condensate fraction and bosonic momentum distribution with respect to the boson concentration is found to hold in an extended range of boson-fermion couplings and concentrations. For vanishing boson density, we prove that the bosonic condensate fraction reduces to the quasiparticle weight Z of the Fermi polaron studied in the context of polarized Fermi gases, unifying in this way two apparently unrelated quantities.
description: 5 pages, 4 figures; final version as published
Causal Fermion Systems as a Candidate for a Unified Physical Theory
Creators: name: Finster, Felix
name: Kleiner, Johannes
Publisher: name: arXiv
Year: 2015
Subjects: subject: Mathematical Physics (math-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The theory of causal fermion systems is an approach to describe fundamental physics. Giving quantum mechanics, general relativity and quantum field theory as limiting cases, it is a candidate for a unified physical theory. We here give a non-technical introduction.
description: 19 pages, LaTeX, minor improvements (published version)
Langevin-like giant magnetoresistance in Co-Cu superlattices
Creators: name: Glick, D.
name: Lauhon, L.
name: Mandrekar, T.
name: Clarke, R.
name: Uher, C.
name: Barlett, D.
name: Tsui, F.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 1994

description: We present evidence for a new type of giant magnetoresistance in (111) cobalt-copper superlattices with atomically smooth interfaces. We propose that the lowered dimensionality of the structure leads to an enhancement of the scattering of conduction electrons from paramagnetic interfaces obeying a Langevin-like saturation at very high fields, well beyond the switching field of the Co layers. The findings help to explain similarities in magnetotransport behavior with recently reported granular systems as well as differences with antiferromagnetically coupled multilayers.
Probing the collective excitations of a spinor polariton fluid
Creators: name: Van Regemortel, M.
name: Wouters, M.
name: Marchetti, F. M.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We propose a pump-probe set-up to analyse the properties of the collective excitation spectrum of a spinor polariton fluid. By using a linear response approximation scheme, we carry on a complete classification of all excitation spectra, as well as their intrinsic degree of polarisation, in terms of two experimentally tunable parameters only, the mean-field polarisation angle and a rescaled pump detuning. We evaluate the system response to the external probe, and show that the transmitted light can undergo a spin rotation along the dispersion for spectra that we classify as diffusive-like. We show that in this case, the spin flip predicted along the dispersion is enhanced when the system is close to a parametrically amplified instability.
description: 11 pages, 8 .pdf figures, accepted version
Brillouin-light-scattering study of long-wavelength acoustic phonons in single-crystal dysprosium films
Creators: name: Klein, M.V.
name: Kong, S.H.
name: Flynn, C.P.
name: Tsui, F.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 1994

description: We have employed Brillouin scattering to investigate elastic-wave velocities as a function of temperature in Dy thin films and in bulk Dy. The single-crystal films were synthesized by molecular-beam epitaxy to ensure high crystalline and interfacial quality. Surface (Rayleigh) and guided-wave (Lamb) modes were probed by the Brillouin technique through the surface ripple-coupling mechanism. Results taken near room temperature in the paramagnetic phase agree very well with a layered-elastic model in which the materials of the samples are represented by elastic behavior using bulk single-crystal elastic data from the literature. At lower temperatures anomalies were found for samples with the thinner Dy layers: Measured wave velocities differed by up to 2% from the model predictions, and the ratio of Lamb-to-Rayleigh intensities was twice the predicted value. The anomalies coincide with the ferromagnetic transitions of the films, and they are believed to originate from coupling between the phonons and the magnetic system in the near-surface region probed by the Brillouin scattering.
Scaling behavior of giant magnetotransport effects in Co/Cu superlattices
Creators: name: Tsui, F.
name: Uher, C.
name: Chen, B.
name: Barlett, D.
name: Clarke, R.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 1994

description: We have observed two forms of scaling in magnetotransport properties of (111) Co/Cu superlattices: (1) the extraoridnary Hall coefficient Rs correlates with the resistivity xx(0) in the form Rsxx2(0), and (2) the magnetothermopower S(H) correlates with the magnetoresistivity xx(H) in the form S(H)/Txx(0)/xx(H). The first effect relates to quantum mechanical side jump while the other relates to interfacial spin-dependent density of states (DOS). These results revel the different roles of bulklike spin-dependent scattering in Co layers and spin-dependent DOS of interfacial layers in causing the observed large positive extraodinary Hall effect and giant longitudinal magnetotransport.
On reciprocity formula of character Dedekind sums and the integral of products of Bernoulli polynomials
Creators: name: Dağlı, M. Cihat
name: Can, Mümün
Publisher: name: arXiv
Year: 2014
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11F20, 11B68, 65B15, 44A10

description: We give a simple proof for the reciprocity formulas of character Dedekind sums associated with two primitive characters, whose modulus need not to be same, by utilizing the character analogue of the Euler-MacLaurin summation formula. Moreover, we extend known results on the integral of products of Bernoulli polynomials by considering the integral \[ \int\limits_{0}^{x}B_{n_{1}}(b_{1}z+y_{1})... B_{n_{r}}(b_{r}z+y_{r}) dz, \] where $b_{l}$ $(b_{l}\neq 0)$ and $y_{l}$ $(1\leq l\leq r)$ are real numbers. As a consequence of this integral we establish a connection between the reciprocity relations of sums of products of Bernoulli polynomials and of the Dedekind sums.
The Smallest Eigenvalue Distribution in the Real Wishart-Laguerre Ensemble with Even Topology
Creators: name: Wirtz, Tim
name: Akemann, Gernot
name: Guhr, Thomas
name: Kieburg, Mario
name: Wegner, René
Publisher: name: arXiv
Year: 2015
Subjects: subject: Mathematical Physics (math-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We consider rectangular random matrices of size $p\times n$ belonging to the real Wishart-Laguerre ensemble also known as the chiral Gaussian orthogonal ensemble. This ensemble appears in many applications like QCD, mesoscopic physics, and time series analysis. We are particularly interested in the distribution of the smallest non-zero eigenvalue and the gap probability to find no eigenvalue in an interval $[0,t]$. While for odd topology $ν=n-p$ explicit closed results are known for finite and infinite matrix size, for even $ν>2$ only recursive expressions in $p$ are available.The smallest eigenvalue distribution as well as the gap probability for general even $ν$ is equivalent to expectation values of characteristic polynomials raised to a half-integer. The computation of such averages is done via a combination of skew-orthogonal polynomials and bosonisation methods. The results are given in terms of Pfaffian determinants both at finite $p$ and in the hard edge scaling limit ($p\to\infty$ and $ν$ fixed) for an arbitrary even topology $ν$. Numerical simulations for the correlated Wishart ensemble illustrate the universality of our results in this particular limit. These simulations point to a validity of the hard edge scaling limit beyond the invariant case.
description: 28 pages, 5 figures; minor corrections
Supplementary Material: A Novel Context-adaptive Fusion of Shadow and Highlight Regions for Efficient Sonar Image Classification
Creators: Anukul Kiran B
Athira Nambiar
Suresh Rajendran
Publisher: name: IEEE Signal Processing Society
Year: 2025

description: Sonar imaging is fundamental to underwater exploration, with critical applications in defense, navigation, and marine research. Shadow regions, in particular, provide essential cues for object detection and classification, yet existing studies primarily focus on highlight-based analysis, leaving shadow-based classification underexplored. To bridge this gap, we propose a Context-adaptive sonar image classification framework that leverages advanced image processing techniques to extract and integrate discriminative shadow and highlight features. Our framework introduces a novel shadow-specific classifier and adaptive shadow segmentation, enabling effective classification based on the dominant region. This approach ensures optimal feature representation, improving robustness against noise and occlusions. In addition, we introduce a Region-aware denoising model that enhances sonar image quality by preserving critical structural details while suppressing noise. This model incorporates an explainability-driven optimization strategy, ensuring that denoising is guided by feature importance, thereby improving interpretability and classification reliability. Furthermore, we present S3Simulator+, an extended dataset incorporating naval mine scenarios with physics-informed noise specifically tailored for the underwater sonar domain, fostering the development of robust AI models. By combining novel classification strategies with an enhanced dataset, our work addresses key challenges in sonar image analysis, contributing to the advancement of autonomous underwater perception.
Interference and SINR coverage in spatial non-slotted Aloha networks
Creators: name: Blaszczyszyn, Bartlomiej
name: Muhlethaler, Paul
Publisher: name: arXiv
Year: 2014
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: Probability (math.PR)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: In this paper we propose two analytically tractable stochastic-geometric models of interference in ad-hoc networks using pure (non-slotted) Aloha as the medium access. In contrast the slotted model, the interference in pure Aloha may vary during the transmission of a tagged packet. We develop closed form expressions for the Laplace transform of the empirical average of the interference experienced during the transmission of a typical packet. Both models assume a power-law path-loss function with arbitrarily distributed fading and feature configurations of transmitters randomly located in the Euclidean plane according to a Poisson point process. Depending on the model, these configurations vary over time or are static. We apply our analysis of the interference to study the Signal-to-Interference-and-Noise Ratio (SINR) outage probability for a typical transmission in pure Aloha. The results are used to compare the performance of non-slotted Aloha to the slotted one, which has almost exclusively been previously studied in the same context of mobile ad-hoc networks.
description: arXiv admin note: substantial text overlap with arXiv:1002.1629; Annales des telecommunications -- annals of telecommunications. Publised online 19 February 2015
Shape-sensitive Pauli blockade in a bent carbon nanotube
Creators: name: Széchenyi, Gábor
name: Pályi, András
Publisher: name: arXiv
Year: 2014
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Motivated by a recent experiment [F. Pei et al., Nat. Nanotech. 7, 630 (2012)], we theoretically study the Pauli blockade transport effect in a double quantum dot embedded in a bent carbon nanotube. We establish a model for Pauli blockade, taking into account the strong g-factor anisotropy that is linked to the local orientation of the nanotube axis in each quantum dot. We provide a set of conditions under which our model is approximately mapped to the spin-blockade model of Jouravlev and Nazarov [O. N. Jouravlev and Y. V. Nazarov, Phys. Rev. Lett. 96, 176804 (2006)]. The results we obtain for the magnetic anisotropy of the leakage current, together with their qualitative geometrical explanation, provide a possible interpretation of previously unexplained experimental results. Furthermore, we find that in a certain parameter range, the leakage current becomes highly sensitive to the shape of the tube, and this sensitivity increases with increasing g-factor anisotropy. This mutual dependence of the electron transport and the tube shape allows for mechanical control of the leakage current, and for characterization of the tube shape via measuring the leakage current.
description: 9 pages, 4 figures
Positive giant magnetoresistance in Dy/Sc superlattices
Creators: name: Flynn, C.P.
name: Tsui, F.
name: Uher, C.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 1994

description: We have discovered large positive magnetoresistance in Dy/Sc superlattices at low temperatures. These and other magnetotransport phenomena lack the hysteresis of the observed Dy magnetization. We offer a speculative interpretation in terms of interfacial reflectivity.
"Der Plan des Herrn wird durch ihn gelingen" (Jes 53,10)
Creators: name: Dohmen, Christoph
Publisher: name: Internationale katholische Zeitschrift Communio
Year: 2022

description: Internationale katholische Zeitschrift Communio, Bd. 32 Nr. 5 (2003): Internationale katholische Zeitschrift Communio, Band 32, Heft 5
TASI Lectures on Flavor Physics
Creators: name: Ligeti, Zoltan
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: These notes overlap with lectures given at the TASI summer schools in 2014 and 2011, as well as at the European School of High Energy Physics in 2013. This is primarily an attempt at transcribing my hand-written notes, with emphasis on topics and ideas discussed in the lectures. It is not a comprehensive introduction or review of the field, nor does it include a complete list of references. I hope, however, that some may find it useful to better understand the reasons for excitement about recent progress and future opportunities in flavor physics.
description: 42 pages, few typos corrected and references added, published verison
title: Articulando Biodiversidad en Producción Familiar
title: Evaluación participativa de variedades forrajeras y frutales con potencial de adaptación a sistemas de producción familiar del Uruguay
titleType: AlternativeTitle
Creators: name: Comité Nacional sobre los Recursos Fitogeneticos
name: Red de Agroecología del Uruguay (RAU)
name: Red Nacional de Semillas Nativas y Criollas
Publisher: name: ITPGRFA
Year: 2022
Subjects: National strategy
Seed system
Breeding
Production
Traditional knowledge
ITPGRFA-BSF
Climate change
Adaptation
PR-177
Crop diversity
Family farming
Conservation
Resilience
Food security
Sustainable agriculture
URY
Native varieties

description: En Uruguay hace ya unos años, funciona el Comité Nacional sobre los Recursos Fitogeneticos, como mecanismo de gobernanza donde participan instituciones y organizaciones vinculadas a la temática. Sistemáticamente se evalúan las necesidades nacionales y las formas de solución de manera coordinada y colaborativa. Fue en ese marco donde se alentó a estas tres organizaciones de la producción familiar, a presentar una propuesta al 4to ciclo del Fondo, el cual fue aprobado, llamándose: “Articulación nacional para la gobernanza y gestión de colectiva de la diversidad genética y sus conocimientos asociados en la agricultura familiar y campesina del Uruguay”. Este proyecto buscó permanentemente, mejorar varios aspectos de la realidad nacional de Uruguay: mejorar temas de conservación en las chacras, instalar espacios físicos de intercambio y conservación, intercambiar materiales con la investigación para contar con variedades adaptadas al cambio climático y a los sistemas de producción familiares de pequeña escala, mitigar efectos adversos sobre el medio ambiente, mejorar la rentabilidad económica, intercambios de saberes y aprendizajes, participación en foros internacionales, solicitar materiales de otras partes del mundo, entre otros. Una de las grandes líneas del proyecto tuvo que ver con frutales y forrajeras, otra línea importante apuntó al trabajo con variedades nativas y criollas de cultivos de importancia para la soberanía alimentaria del país. 

El manual se elaboró en el marco del proyecto "Articulación nacional para la gobernanza y gestión de colectiva de la diversidad genética y sus conocimientos asociados en la agricultura familiar y campesina del Uruguay", financiado por el Fondo de Distribución de Beneficios (BSF) del Tratado Internacional sobre los Recursos Fitogenéticos para la Alimentación y la Agricultura (TIRFAA) de la Organización de las Naciones Unidas para la Agricultura y la Alimentación (FAO). El objetivo general del proyecto es poner a los agricultores de todo el mundo en condiciones de utilizar y conservar variedades adaptadas que conduzcan al aumento de la productividad y los ingresos agrícolas, el aumento de la disponibilidad de diversos alimentos ricos en nutrientes, la reducción de los efectos adversos en el medio ambiente y la mejora de la resiliencia ante las crisis de producción. Garantizar que la biodiversidad para la seguridad alimentaria esté protegida de cara al futuro. En este manual se resumen algunos de los principales resultados del proyecto.
Linear perturbations in K-mouflage cosmologies with massive neutrinos
Creators: name: Barreira, Alexandre
name: Brax, Philippe
name: Clesse, Sebastien
name: Li, Baojiu
name: Valageas, Patrick
Publisher: name: arXiv
Year: 2014
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We present a comprehensive derivation of linear perturbation equations for different matter species, including photons, baryons, cold dark matter, scalar fields, massless and massive neutrinos, in the presence of a generic conformal coupling. Starting from the Lagrangians, we show how the conformal transformation affects the dynamics. In particular, we discuss how to incorporate consistently the scalar coupling in the equations of the Boltzmann hierarchy for massive neutrinos and the subsequent fluid approximations. We use the recently proposed K-mouflage model as an example to demonstrate the numerical implementation of our linear perturbation equations. K-mouflage is a new mechanism to suppress the fifth force between matter particles induced by the scalar coupling, but in the linear regime the fifth force is unsuppressed and can change the clustering of different matter species in different ways. We show how the CMB, lensing potential and matter power spectra are affected by the fifth force, and find ranges of K-mouflage parameters whose effects could be seen observationally. We also find that the scalar coupling can have the nontrivial effect of shifting the amplitude of the power spectra of the lensing potential and density fluctuations in opposite directions, although both probe the overall clustering of matter. This paper can serve as a reference for those who work on generic coupled scalar field cosmology, or those who are interested in the cosmological behaviour of the K-mouflage model.
description: 22 pages, 4 figures
Magnetic properties of Dy-Lu alloys
Creators: name: Salamon, M.B.
name: Park, B.J.
name: Flynn, C.P.
name: Everitt, B.A.
name: Erwin, R.W.
name: Borchers, J.A.
name: Tsui, F.
Publisher: name: American Institute of Physics Inc.
Year: 1994

description: Although many binary heavy rare-earth alloy systems have been studied extensively, there has been little work reported on the Dy-Lu system. The properties of single-crystal DyxLu1-x films grown by molecular beam epitaxy are reported. SQUID magnetometer and neutron diffraction measurements on samples with x=0.4, 0.5, and 0.6 show that the samples order helimagnetically with Néel temperatures of TN=90, 105, and 120 K, respectively. The helical turn angle was mapped as a function of temperature for each of the three alloys. Magnetic x-ray scattering, the first in an alloy, was observed at the (002)± positions at 15 and 60 K in the x=0.4 sample using resonant exchange scattering of synchrotron radiation at the Dy LIII edge.
MPEC 2023-F204 : 2023 FB7
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2023
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: 2023 FB7

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Dual Hardware-In-the-Loop: a step beyond the state-of-the-art in laboratory tests
Creators: name: Alessandri, Giacomo
name: Gallorini, Frederico
Publisher: name: Zenodo
Year: 2022
Subjects: DIHL
Wave energy
Laboratory testing

description: Dual Hardware-In-the-Loop: a step beyond the state-of-the-art in laboratory tests Importance of laboratory testing Applicability of DHIL to wave energy Dual Hardware-In-the-Loop (DHIL) testing concept
title: Enceinte Holobiont
Creators: name: Perry, Olivia
Publisher: name: Emily Carr University of Art and Design
Year: 2019
Subjects: subject: Sculpture
subject: Installations (Art)
subject: Motherhood
subject: Motherhood and the arts
subject: Feminism

description: This thesis document, Enceinte Holobiont, explores the positional, practical, and theoretical underpinnings of my recent sculptures Composite Tension. My thesis (both conceptual and visual) focuses on the model of the maternal body that speaks to the questions I raise through these sculptural forms. I propose three questions to engage the pregnant-birthing-maternal body. I ask how maternal bodies speak to (1) repetitive domestic labour, (2) the abject, as enceinte or space of ‘other’ within a patriarchal-capitalistic society, and (3) the idea of the collective holobiont. I use the terms enceinte and holobiont as metaphors for an undefinable messy body as it relates to the capitalistic ideal of an individualized body. My explorations through sculptural forms consist mainly of sewn and crocheted objects that include a personal archive from a documentation series of domestic labour. I reference historical and contemporary feminist artists to enter the discourse of re-writing the maternal body counter to patriarchal depictions of motherhood. My artistic research is both practical and theoretical. I engage multiple tensioned conversations that address and challenge the notion of self and other, as well as how the ethics of care functions within patriarchal systems. I use the maternal body, the enceinte holobiont, as a starting point.
Quasi-parton distribution functions: a study in the diquark spectator model
Creators: name: Gamberg, Leonard
name: Kang, Zhong-Bo
name: Vitev, Ivan
name: Xing, Hongxi
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Lattice (hep-lat)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: A set of quasi-parton distribution functions (quasi-PDFs) have been recently proposed by Ji. Defined as the matrix elements of equal-time spatial correlations, they can be computed on the lattice and should reduce to the standard PDFs when the proton momentum $P_z$ is very large. Since taking the $P_z\to \infty$ limit is not feasible in lattice simulations, it is essential to provide guidance for what values of $P_z$ the quasi-PDFs are good approximations of standard PDFs. Within the framework of the spectator diquark model, we evaluate both the up and down quarks' quasi-PDFs and standard PDFs for all leading-twist distributions (unpolarized distribution $f_1$, helicity distribution $g_1$, and transversity distribution $h_1$). We find that, for intermediate parton momentum fractions $x$, quasi-PDFs are good approximations to standard PDFs (within $20-30%$) when $P_z\gtrsim 1.5-2$ GeV. On the other hand, for large $x\sim 1$ much larger $P_z > 4$ GeV is necessary to obtain a satisfactory agreement between the two sets. We further test the Soffer positivity bound, and find that it does not hold in general for quasi-PDFs.
description: 13 pages, 9 figures, added reference, to appear in Phys. Lett. B
An alternate route to giant magnetoresistance in MBE-grown Co-Cu superlattices (invited)
Creators: name: Uher, C.
name: Clarke, R.
name: Barlett, D.
name: Chen, B.
name: Tsui, F.
Publisher: name: American Institute of Physics Inc.
Year: 1994

description: Co-Cu superlattices grown by MBE in the (111) orientation show weak or nonexistent interlayer exchange coupling, yet several groups have observed large high-field magnetoresistance signals in excess of 30%. In the present work, we address some of the questions relating to GMR and the interlayer coupling by studying samples with atomically abrupt interfaces, as probed by real-time RHEED techniques, HRTEM, and spin-echo NMR. We propose that the lowered dimensionality of the structure leads to an enhancement of the scattering of conduction electrons from paramagnetic interfaces obeying a Langevin-like saturation at very high fields, well beyond the switching field of the Co layers. Scaling between the GMR and thermopower measurements suggests that a spin-dependent density of states at the Co-Cu interfaces is responsible for the observed magnetotransport behavior in these samples, rather than antiferromagnetically coupled Co layers.
Towards Inclusive Innovation: The Role of Open Science
Creators: name: Mboa Nkoudou, Thomas Hervé
Publisher: name: Zenodo
Year: 2020
Subjects: Open Science
Innovation
Africa
DIYBio

description: Workshop on Science, Technology and Innovation for the SDGs  Meeting of the IATT and 10-Member group under the TFM in preparation of the Multi-Stakeholder Meeting on Science, Technology and Innovation for the SDGs 2020  Room C1, Vienna International Centre, Vienna, Austria, 3 – 5 February 2020 Co-organized by DESA, UNCTAD, UNOSD, OOSA, and UNIDO.
Holographic Schwinger effect in de Sitter space
Creators: name: Fischler, Willy
name: Nguyen, Phuc H.
name: Pedraza, Juan F.
name: Tangarife, Walter
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Using the AdS/CFT correspondence, we construct the holographic dual of a tunneling instanton describing Schwinger pair creation in de Sitter space. Our approach allows us to extract the critical value of the electric field for which the potential barrier disappears, rendering the vacuum unstable. In addition, we compute the large-$λ$, large-$N_c$ corrections to the nucleation rate and we find that it agrees with previous expectations based on perturbative computations. As a by-product of this investigation, we study the causal structure of the string dual to the nucleated pair as seen by different static observers and we show that it can be interpreted as a dynamical creation of a `gluonic' wormhole. We explain how this result provides further evidence for the ER=EPR conjecture as an equivalence between two descriptions of the same physical phenomenon.
description: 23 pages, multiple figures. v2: minor clarifications and references added
Taking staff into the 4th IR. Rethinking the roles and skills of librarians
Creators: name: Maimela, Chipa
Publisher: name: UPSpace
Year: 2019
Subjects: Technology
People
Systems
(TIPS)

description: The truth already exist that suggest that Artificial Intelligence (AI) and Internet of Things (IOT) is changing the world, and this will also affect the skills in any field including the Library. Further predictions suggest that intelligent machines will be able to do every task better and more cheaply than humans. Several questions are being raised specifically for the Library services as to when will the AI or IOT start impacting human performance, when will the machines exceed human performance and when will the machines start performing Library jobs. The questions asked can be outlined using a framework focusing on the management of Technology, Innovation, People, and Systems (TIPS), The framework unpacks how Technology is directed and managed through Innovative means, Innovation itself needs to be managed by People who are always drivers of the Systems which also requires intensive management approaches. Using TIPS framework in the Library staff will always strive to manage all the AI and IOT processes. TIPS framework will be directed towards achieving specific Library tasks and in the process Innovation will require the Systematic approach which includes agility and alignment and continuous engagement. Although the framework indicates that the process is not linear, which means the process of adaptation is followed by adjusting to changes, implementation and innovating again. This will ultimately bring further innovative mechanisms to try and counteract any further changes that the IOT and AI may bring to the Library staff for further development to take place.
Growth of rare-earth monolayers on synthetic fluorine mica
Creators: name: Tsui, F.
name: Han, P.D.
name: Flynn, C.P.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 1993

description: We have grown single-crystal rare-earth films on cleaved faces of synthetic fluorine mica fluorophlogopite by molecular-beam-epitaxy techniques. This has made it possible to measure material properties such as magnetism in monolayer structures.
Artificial intelligence (AI) and how it affects the Learning and development in Libraries.
Creators: name: Maimela, Chipa
Publisher: name: Zenodo
Year: 2021
Subjects: subject: Artificial intelligence
subject: Robotics
subject: learning and development
subject: Digital skills
subject: Libraries

description: Artificial Intelligence (AI) places the learning and development of Library staff in the spotlight. With the growing prevalence of Robots and AI-powered systems, there is a growing need for the alignment of Library employees to understand the drifting of traditional learning and development aspects used by librarians to a more advanced and aligned to AI and robotics-driven learning and development. AI and robotics-driven learning and development become a major aspect of the library workforce to be able to assist the anticipated AI and robotics-driven customer. This can only be possible when learning and development are able to motivate during the sourcing, skilling, and reskilling of the workforce and present a convincing picture about the direction of the future and how it will look like to be able to approach the AI and robotics-driven Library space.
Low Mach Number Fluctuating Hydrodynamics of Multispecies Liquid Mixtures
Creators: name: Donev, A.
name: Nonaka, A. J.
name: Bhattacharjee, A. K.
name: Garcia, A. L.
name: Bell, J. B.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We develop a low Mach number formulation of the hydrodynamic equations describing transport of mass and momentum in a multispecies mixture of incompressible miscible liquids at specified temperature and pressure that generalizes our prior work on ideal mixtures of ideal gases and binary liquid mixtures. In this formulation we combine and extend a number of existing descriptions of multispecies transport available in the literature. The formulation applies to non-ideal mixtures of arbitrary number of species, without the need to single out a 'solvent' species, and includes contributions to the diffusive mass flux due to gradients of composition, temperature and pressure. Momentum transport and advective mass transport are handled using a low Mach number approach that eliminates fast sound waves (pressure fluctuations) from the full compressible system of equations and leads to a quasi-incompressible formulation. Thermal fluctuations are included in our fluctuating hydrodynamics description following the principles of nonequilibrium thermodynamics. We extend the semi-implicit staggered-grid finite-volume numerical method developed in our prior work on binary liquid mixtures, and use it to study the development of giant nonequilibrium concentration fluctuations in a ternary mixture subjected to a steady concentration gradient. We also numerically study the development of diffusion-driven gravitational instabilities in a ternary mixture, and compare our numerical results to recent experimental measurements in a Hele-Shaw cell. We find that giant nonequilibrium fluctuations can trigger the instability but are eventually dominated by the deterministic growth of the unstable mode, in both quasi two-dimensional (Hele-Shaw), and fully three-dimensional geometries used in typical shadowgraph experiments.
description: Submitted to Physics of Fluids
Magnetic phase diagram of epitaxial dysprosium
Creators: name: Flynn, C.P.
name: Tsui, F.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 1993

description: We have determined the magnetic phase diagram of Dy as a function of epitaxial strain , applied field H, and temperature T. $roman Y sub x roman Lu sub 1-x- alloys were employed as templates to clamp the films at selected strains. The separate roles of epitaxial clamping and strain are identified for the first time. There is a clearly defined transition as the strain is changed at low temperature from the clamped helical phase to the ferromagnetic phase. The transition is modeled by a linear coupling treatment of the magnetoelastic strains.
Christliche Gestalten in der modernen französischen Literatur
Creators: name: Kapp, Volker
Publisher: name: Internationale katholische Zeitschrift Communio
Year: 2022

description: Internationale katholische Zeitschrift Communio, Bd. 32 Nr. 4 (2003): Internationale katholische Zeitschrift Communio, Band 32, Heft 4