cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Application de l’analyse d’images par deep learning à la détermination de la composition de granulats recyclés
Creators: name: LAU HIU HOONG, Jean David
Publisher: name: Academic Journal of Civil Engineering
Year: 2020

description: À travers le programme Horizon 2020, l’Union Européenne promeut l’économie circulaire en incitant ses états membres à recycler au moins 70% de leurs déchets du BTP. Ces déchets sont concassés pour obtenir des granulats recyclés (GR). Ces derniers sont un mélange de béton, pierres naturelles, terre cuite, grains bitumineux et d’autres matériaux (e.g. verre et bois). Leur composition est variable et la norme NF EN 933-11 préconise un tri manuel pour la déterminer. Cependant, ce tri est chronophage et n’est réalisé que ponctuellement sur les plateformes de recyclage. Notre travail vise à déterminer la composition de GR de manière rapide et automatisée. Nous faisons appel à l’analyse d’images par deep learning et notamment aux réseaux de neurones convolutifs (RNC). Les RNC analysent les images de GR et identifient la nature de chaque grain afin de donner la composition des GR. Une base de données labellisée d’environ 36 000 images de grains individuels triés a été créée pour l’apprentissage des RNC. Le meilleur RNC est maintenant capable de classer correctement 97% des grains. Nous proposons aussi un moyen d’estimer la masse des granulats grâce à des facteurs de forme. Nous avons comparé la composition d’un échantillon de GR obtenue par notre méthode et par le tri manuel. Il y a moins de 1,5% d’écart de proportion massique pour la majorité des natures de GR testées.
description: Academic Journal of Civil Engineering, Vol 38 No 1 (2020): Special Issue - RUGC 2020 Marrakech
Additional file 1 of From insight network to open policy practice: practical experiences
Creators: name: Tuomisto, Jouni T.
name: Pohjola, Mikko V.
name: Rintala, Teemu J.
Publisher: name: figshare
Year: 2020
Subjects: subject: Information Systems
subject: FOS: Computer and information sciences

description: Additional file 1: Appendix S1. Open assessments performed. Appendix S2. Examples of insight networks. Appendix S3. Open policy ontology. Appendix S4. Workspace tools: OpasnetUtils package and Opasnet Base. Appendix S5. Tools to help in shared understanding.
Detection of the Red Supergiant Wind from the Progenitor of Cassiopeia A
Creators: name: Weil, Kathryn E.
name: Fesen, Robert A.
name: Patnaude, Daniel J.
name: Raymond, John C.
name: Chevalier, Roger A.
name: Milisavljevic, Dan
name: Gerardy, Christopher L.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Cassiopeia A (Cas A) is one of the best studied young Galactic supernova remnants. While providing a rare opportunity to study in detail the remnant of a Type IIb supernova, questions remain regarding the nature of its progenitor, its mass-loss history, and its pre-SN evolution. Here we present an optical investigation of the circumstellar environment around Cas A and find clumpy and filamentary Halpha emission nebulosities concentrated 10-15 pc (10-15 arcminutes) to the north and east. First reported by Minkowski as a faint H II region, these nebulosities exhibit distinct morphological and spectroscopic properties relative to the surrounding diffuse emissions. Compared to neighboring H II regions, these nebulae show stronger [N II] 6548, 6583 A and [S II] 6716, 6731 A emissions relative to Halpha. We show that Cas A's highest-velocity ejecta knots are interacting with some of the closest projected emission nebulae, thus providing strong evidence that these nebulae lie at the same distance as the remnant. We interpret these surrounding nebulosities to be the remains of the progenitor's red supergiant wind which accumulated against the southern edge of a large extended H II region located north of Cas A. Our findings are consistent with the view that Cas A's progenitor underwent considerable mass-loss, first from a fast main-sequence wind, then from a slower, clumpy red supergiant wind, and finally from a brief high-velocity wind, like that from a yellow supergiant.
description: 19 pages, 9 figures, accepted to ApJ
Dispositif expérimental pour la mesure de propriétés élastiques et cohésives à l’échelle de l’interface ciment-granulat
Creators: name: Lhonneur, Joffrey
Publisher: name: Academic Journal of Civil Engineering
Year: 2020

description: La rupture d’un béton est grandement conditionnée par la qualité des propriétés de cohésion de la zone de transition interfaciale entre matrice cimentaire et granulats. La caractérisation expérimentale quantitative de ces propriétés reste une question très ouverte au sein de la communauté scientifique. Dans cette étude, nous présentons un dispositif expérimental innovant de flexion trois points permettant l’acquisition, à l’échelle locale de l’interface pâte de ciment/granulat, de la réponse mécanique des phases en présence et de la vitesse de propagation de fissure en surface de l’éprouvette. Les résultats obtenus ont vocation à être utilisés pour l’identification des paramètres des modèles de rupture quasi-fragile basés sur des approches élastiques-cohésives.
description: Academic Journal of Civil Engineering, Vol 38 No 1 (2020): Special Issue - RUGC 2020 Marrakech
Quantum phase transition in the one-dimensional extended Peierls-Hubbard model
Creators: name: Benthien, H.
name: Essler, F. H. L.
name: Grage, A.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We consider the one-dimensional extended Hubbard model in the presence of an explicit dimerization $δ$. For a sufficiently strong nearest neighbour repulsion we establish the existence of a quantum phase transition between a mixed bond-order wave and charge-density wave phase from a pure bond-order wave phase. This phase transition is in the universality class of the two-dimensional Ising model.
description: 6 pages, 3 figures
Substitution Totale du Sable Naturel par du Sable Concassé dans le Béton : Une Solution Pertinente pour le Liban
Creators: name: Abi Farraj, Faten Fadi
Publisher: name: Academic Journal of Civil Engineering
Year: 2020

description: En raison de la détérioration de la qualité du sable naturel siliceux et des effets néfastes de son exploitation pour l’environnement, le secteur de la construction au Liban, comme dans plusieurs autres pays, doit trouver une solution de substitution à son usage. Actuellement, ce sable trop fin pour être utilisé comme seul sable dans le béton selon la norme ASTM C33, est toujours mélangé avec un pourcentage approprié d’un sable calcaire concassé de carrière. L’objectif de cette étude est d’évaluer la possibilité de remplacement total de ce sable naturel par du sable concassé calcaire, afin de limiter la dépendance actuelle du secteur de la construction libanais à son utilisation, dans la perspective d’une éventuelle future interdiction de son exploitation pour des raisons environnementales ou du fait de sa raréfaction. Le programme expérimental consiste à comparer les caractéristiques mécaniques, résistances à la compression et à la flexion, évaluées à différentes échéances, de différentes formulations de béton avec ou sans sable naturel. L’analyse comparative des résultats permet d’évaluer les effets du type de sable et des distributions granulométriques. Les résultats obtenus permettent de conclure que le sable concassé calcaire peut être considéré comme une solution alternative pertinente à l’utilisation du sable naturel siliceux.
description: Academic Journal of Civil Engineering, Vol 38 No 1 (2020): Special Issue - RUGC 2020 Marrakech
Ising model as Wilson-Majorana Fermions
Creators: name: Wolff, Ulli
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We show the equivalence of the 2D Ising model to standard free Euclidean lattice fermions of the Wilson Majorana type. The equality of the loop representations for the partition functions of both systems is established exactly for finite lattices with well-defined boundary conditions. The honeycomb lattice is particularly simple in this context and therefore discussed first and only then followed by the more familiar square lattice case.
description: 19 pages, 5 figures, sec. 3.3 added detailing the relation with Samuel's fermionization
Beef Consumption Reduction and Climate Change Mitigation
Creators: name: Darbandi, Elham
name: Saghaian, Sayed
name: Darbandi, Elham
name: Saghaian, Sayed
Publisher: name: Unknown
Year: 2018
Subjects: Agribusiness
Agricultural and Food Policy
Livestock Production/Industries

description: Keeping global temperature rises below two degrees Celsius is a targeted international community goal. The literature suggests that it is important to explicitly consider the consumption side, as well as the production side to achieve this goal. However, the lack of awareness among the public related to the linkage of the livestock sector and climate change may hinder consumers to change their consumption behavior to reduce Green House Gas (GHG) emissions. This study has two purposes. First, we quantify the environmental loading of U.S. beef sector by calculating emission levels over the period of 1990-2017. Beef cattle is one of the most emission-intensive sectors, which is responsible for 54% of total GHGs from livestock. Following International Panel on Climate Change (IPCC) guideline, we identify three sources of emissions, including enteric fermentation, manure management, and manure left on pastures. Second, we provide an understanding of consumption-environmental connection related to the beef industry. This knowledge might help to avoid the catastrophic climate change consequences in the future.
FUTURE ECONOMIC CO-OPERATION AND INTEGRATION IN SOUTHERN AFRICA: SOME BASIC IDEAS
Creators: name: Otto, R-J.
name: Darroch, M. A. G.
name: Otto, R-J.
name: Darroch, M. A. G.
Publisher: name: Unknown
Year: 1992
Subjects: Agricultural and Food Policy
Institutional and Behavioral Economics
Political Economy

description: Political changes in South Africa and the worldwide trend towards formation of trade blocs make it necessary to study prospects for closer future economic co-operation and integration in Southern Africa. A review of past integration attempts indicates the need for all major Southern African regional bodies to reassess their functions and roles. An agenda of issues which must be addressed in the formation of a possible Southern African Economic Union (SAEU) - with South Africa as the potential engine of economic growth - is discussed. Closer integration, if merited, should probably occur between economies that are ready.
Caractérisation et optimisation multiphysiques d’une paroi bicouche bio et géosourcée
Creators: name: Lagouin, Méryl
Publisher: name: Academic Journal of Civil Engineering
Year: 2020

description: Les matériaux bio et géosourcés présentent un fort potentiel pour le développement d’éco-matériaux de construction. Ils représentent une solution viable pour répondre aux enjeux environnementaux, énergétiques et de confort de par leur faible impact environnemental et leur hygroscopicité. Dans ce cadre, le travail de thèse vise à proposer une solution bicouche bio et géosourcée qui associe un béton végétal à un enduit terre crue. L’optimisation hygrique et/ou thermique de chacun des éléments constitutifs de la paroi permet l’obtention d’un élément complexe au fort pouvoir de régulation hygrothermique. Cette optimisation est faite de sorte à garantir le bon comportement mécanique des éléments.
description: Academic Journal of Civil Engineering, Vol 38 No 1 (2020): Special Issue - RUGC 2020 Marrakech
AN ANYLYSES OF THE US IMPORT MARKET FOR ROSES WITH SPECIFIC REFERENCES TO OPPORTUNITIES FOR SOUTH AFRICA
'n Ontleding van die VSA invoer mark vir rose met. spesifieke. verwysing na geleenthede vir Suid-Afrika
Creators: name: Van Der Vyver, Andre
name: Van Der Vyver, Andre
Publisher: name: Unknown
Year: 1992
Subjects: subject: Crop Production/Industries
subject: International Relations/Trade
subject: Marketing
subject: FOS: Economics and business

description: US imports of cut roses have increased steadily over the last two decades, from Jess than 1 million stems in 1970 to a record 314 million stems in 1988. The three commercially most important types are the sweethearts or miniatures, the, intermediates and the hybrid tea roses. Almost all import are of the hybrid tea type. In 1988, more than 87 percent of US imports of cut roses entered through Miami followed by Houston and New York. In 1990, 74 percent of all imported roses orginated in Colombia. Prices of cut roses vary according to their physical characteristics e.g. _lenglh, freshness and colour, as well as supply and demand. ·sA can only export cut flowers via SAA to New York for likely sale on the New York Flower Wholesale Market. The single strongest point in selling roses is quality. Even in the worse case scenario where SA roses will still fetch prices equivalent to that of Columbian roses, the lowest on the market. The profit margin appears to be sufficient.
DIE DAARSTELLING VAN 'N KONSEPTUELE RAAMWERK VIR VOLHOUBARE LANDBOU
Creators: name: Lyons, F. T.
name: Lombard, J. P.
name: Lyons, F. T.
name: Lombard, J. P.
Publisher: name: Unknown
Year: 1992
Subjects: Agricultural and Food Policy
Environmental Economics and Policy

description: The aim of this article is to clarify the confusion regarding the meaning of sustainable agriculture. A conceptual framework of sustainable agriculture was developed in order to address the problem. This framework can successfully be applied for the evaluation and planning of agricultural systems. The framework was used to evaluate the alternative agricultural schools of thought. Further an attemp was made to uncover the disparities that were evident among the alternative schools. It was found that the application of environmentally friendly practises in their own right, did not conclusively address the matter of agricultural sustainability. Agriculture can only be sustainable over the long run if economical, political, aesthetical, ethical and scientific variables are simultaneously addressed.
Self-driven oscillation in Coulomb blockaded suspended carbon nanotubes
Creators: name: Willick, Kyle
name: Baugh, Jonathan
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: Suspended carbon nanotubes are known to support self-driven oscillations due to electromechanical feedback under certain conditions, including low temperatures and high mechanical quality factors. Prior reports identified signatures of such oscillations in Kondo or high-bias transport regimes. Here, we observe self-driven oscillations that give rise to significant conduction in normally Coulomb-blockaded low-bias transport. Using a master equation model, the self-driving is shown to result from strongly energy-dependent electron tunneling, and the dependencies of transport features on bias, gate voltage, and temperature are well reproduced.
description: Main text + Appendices (8 pages, 10 figures)
Potential Coexistence of Exciton and Fermion Pair Condensations
Creators: name: Sager, LeeAnn M.
name: Safaei, Shiva
name: Mazziotti, David A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Extensive theoretical and experimental investigation has been conducted on fermion pair condensation and exciton condensation as distinct classes of Bose-Einstein-like condensation. In this work, the existence of a fermion-exciton condensate---a single quantum state in which character of both fermion pair and exciton condensates coexist---is established computationally in the low-particle-number ($N$) limit and theoretically in the large-$N$ thermodynamic limit. The trade-off between the fermion pair and excitonic character of the fermion-exciton condensate is shown to be elliptic in nature. The possibility that the properties of fermion-exciton condensates could be a hybrid of the properties of fermion pair condensates and exciton condensates is discussed, and future experimental and computational exploration of this new class of condensate, which may potentially be realizable in a bilayer of superconductors, is anticipated.
Commensurate-Incommensurate Magnetic Phase Transition in Magnetoelectric Single Crystal LiNiPO$_4$
Creators: name: Vaknin, D.
name: Zarestky, J. L.
name: Rivera, J. -P.
name: Schmid, H.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Neutron scattering studies of single-crystal LiNiPO$_4$ reveal a spontaneous first-order commensurate-incommensurate magnetic phase transition. Short- and long-range incommensurate phases are intermediate between the high temperature paramagnetic and the low temperature antiferromagnetic phases. The modulated structure has a predominant antiferromagnetic component, giving rise to satellite peaks in the vicinity of the fundamental antiferromagnetic Bragg reflection, and a ferromagnetic component giving rise to peaks at small momentum-transfers around the origin at $(0,\pm Q,0)$. The wavelength of the modulated magnetic structure varies continuously with temperature. It is argued that the incommensurate short- and long-range phases are due to spin-dimensionality crossover from a continuous to the discrete Ising state. These observations explain the anomalous first-order transition seen in the magnetoelectric effect of this system.
Enhanced antiferromagnetic ordering tendency in staggered periodic Anderson model
Creators: name: Jiang, Mi
Publisher: name: arXiv
Year: 2020
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Heavy fermion compounds consisting of two or more inequivalent local moment sites per unit cell have been a promising platform of investigating the interplay between distinct Kondo screenings that is absent in the conventional systems containing only one rare-earth ion per unit cell. We report a remarkable enhancement of the antiferromagnetic (AF) ordering tendency in the staggered periodic Anderson model (PAM) with two alternating inequivalent local moments if their hybridization strengths reside in the Kondo singlet and antiferromagnetic insulator regime separately of the phase diagram of homogeneous PAM. Our results uncover the rich physics induced by the interplay of multiple energy scales in the staggered PAM and furthermore implies the ubiquitous existence of the enhancement of physical quantities in general inhomogeneous systems.
description: To appear in PRB. This work is extended in arXiv:2004.11781 with some text overlap
Additional file 7 of pyCancerSig: subclassifying human cancer with comprehensive single nucleotide, structural and microsatellite mutational signature deconstruction from whole genome sequencing
Creators: name: Jessada Thutkawkorapin
name: Eisfeldt, Jesper
name: Tham, Emma
name: Nilsson, Daniel
Publisher: name: figshare
Year: 2020
Subjects: subject: Biochemistry
subject: Space Science
subject: Genetics
subject: FOS: Biological sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences
subject: Cancer
subject: 110309 Infectious Diseases
subject: FOS: Health sciences
subject: 60506 Virology

description: Additional file 7.
Etude numérique du comportement cyclique de la zone tendue d’assemblage à deux et à quatre files de boulon
Creators: name: SEBBAGH, Hichem Rakib
Publisher: name: Academic Journal of Civil Engineering
Year: 2020

description: Le présent papier est consacré à l’étude numérique par éléments finis du comportement de la zone tendue d’assemblages métalliques de type poteau-poutre avec platine d’about sous sollicitations cycliques. Cette zone peut être représentée par des tronçons en té avec deux et quatre rangées de boulons. Dans un premiers temps un modèle numérique tridimensionnel représentant un tronçon en té à deux boulons par rangée a été élaboré. Il a été calibré sur la base de résultats expérimentaux de tronçons en té sous sollicitation monotone en termes de courbes Force-Déplacement. Par la suite, ce modèle a été utilisé comme base pour élaborer un modèle de tronçon à quatre boulons par rangée. Les deux modèles élaborés ont été construits avec des éléments cubiques à 20 nœuds du logiciel Cast3m. Ces modèles ont permis d’estimer l’apport des boulons externes sur le comportement des tronçons en té sous sollicitations cycliques.
description: Academic Journal of Civil Engineering, Vol 38 No 1 (2020): Special Issue - RUGC 2020 Marrakech
The Microcalorimeter Arrays for a Rhenium Experiment (MARE): a next-generation calorimetric neutrino mass experiment
Creators: name: Monfardini, A.
name: Arnaboldi, C.
name: Brofferio, C.
name: Capelli, S.
name: Capozzi, F.
name: Cremonesi, O.
name: Enss, C.
name: Fiorini, E.
name: Fleischmann, A.
name: Foggetta, L.
name: Gallinaro, G.
name: Gastaldo, L.
name: Gatti, F.
name: Giuliani, A.
name: Gorla, P.
name: Kelley, R.
name: Kilbourne, C. A.
name: Margesin, B.
name: McCammon, D.
name: Nones, C.
name: Nucciotti, A.
name: Pavan, M.
name: Pedretti, M.
name: Pergolesi, D.
name: Pessina, G.
name: Porter, F. S.
name: Prest, M.
name: Previtali, E.
name: Repetto, P.
name: Ribeiro-Gomez, M.
name: Sangiorgio, S.
name: Sisti, M.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Neutrino oscillation experiments have proved that neutrinos are massive particles, but can't determine their absolute mass scale. Therefore the neutrino mass is still an open question in elementary particle physics. An international collaboration is growing around the project of Microcalorimeter Arrays for a Rhenium Experiment (MARE) for directly measuring the neutrino mass with a sensitivity of about 0.2eV/c2. Many groups are joining their experiences and technical expertise in a common effort towards this challenging experiment. We discuss the different scenarios and the impact of MARE as a complement of KATRIN.
description: 3 pages, 1 figure Nucl. Instr. Meth. A, proceedings of LTD11 workshop, Tokyo 2005
An Investigation into the Red Listed Material: Pressure Treated Wood (Preservative Infused) and Possible Alternatives
Creators: name: Yuen, Abby
name: Topalov, Andrew
name: Chen, Jackie
name: Peng, Tess
Publisher: name: The University of British Columbia
Year: 2011

description: Disclaimer: “UBC SEEDS provides students with the opportunity to share the findings of their studies, as well as their opinions, conclusions and recommendations with the UBC community. The reader should bear in mind that this is a student project/report and is not an official document of UBC. Furthermore readers should bear in mind that these reports may not reflect the current status of activities at UBC. We urge you to contact the research persons mentioned in a report or the SEEDS Coordinator about the current status of the subject matter of a project/report.”
Etude thermomécanique d’une éco-brique locale pour la construction
Creators: name: Charai, Mouatassim
Publisher: name: Academic Journal of Civil Engineering
Year: 2020

description: Les pratiques traditionnelles de construction consistent le meilleur moyen pour verdir le secteur des bâtiments et promouvoir les logements écologiques à bas prix. Ce papier présente une étude expérimentale d’une briques écologique locale à base de terre renforcée de fibres végétales. L'objectif de cette étude est de montrer l'efficacité des murs en terre renforcés de fibres pour améliorer l'isolation thermique des bâtiments. L'étude s’est focalisée sur l’investigation de l’effet des fibres végétales sur la performance thermique et le comportement mécanique des adobes. Les résultats montrent que l’incorporation des fibres végétale améliore la résistance thermique des briques de terre crue et joue un rôle de renfort pour la matrice argileuse. Les tests thermiques indiquent une réduction de 56 % de la conductivité thermique et de 46% de la diffusivité thermique, ce qui se traduit par une augmentation significative de la résistance thermique des briques. Les résultats obtenus montrent l’efficacité des adobes préparés pour la régulation de température dans les bâtiments et l’amélioration du confort thermique intérieur.
description: Academic Journal of Civil Engineering, Vol 38 No 1 (2020): Special Issue - RUGC 2020 Marrakech
Scaling rules for the ionization of biological molecules by highly charged ions
Creators: name: Mendez, Alejandra M. P.
name: Montanari, Claudia C.
name: Miraglia, Jorge E.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Atomic and Molecular Clusters (physics.atm-clus)
subject: FOS: Physical sciences

description: We investigate scaling rules for the ionization cross sections of multicharged ions on molecules of biological interest. The cross sections are obtained using a methodology presented in [Mendez et al. J. Phys B (2020)], which considers distorted-wave calculations for atomic targets combined with a molecular stoichiometric model. We examine ions with nuclear charges Z from +1 to +8 impacting on five nucleobases -adenine, cytosine, guanine, thymine, uracil-, tetrahydrofuran, pyrimidine, and water. We investigate scaling rules of the ionization cross section with the ion charge and the number of active electrons per molecule. Combining these two features, we define a scaling law for any ion and molecular target, which is valid in the intermediate to high energy range, i.e., 0.2-5 MeV/amu for oxygen impact. Thus, the forty ion-molecule systems analyzed here can be merged into a single band. We confirm the generality of our independent scaling law with several collisional systems.
description: 5 pages, 2 figures, 1 table
DIE INSTITUSIONELE HERSTRUKTURERING VAN LANDBOUVOORLIGTING IN SUID-AFRIKA
Creators: name: Botha, C. A. J.
name: Van Zyl, J.
name: Botha, C. A. J.
name: Van Zyl, J.
Publisher: name: Unknown
Year: 1992
Subjects: Agricultural and Food Policy
Institutional and Behavioral Economics

description: Due to socio-economic and political influences, extension in South Africa is currently re-organising itself. This reorganisation should be planned and done with a long-term perspective. To achieve this end, some short term measures will have to be taken. It is suggested that the inherited organisational structures be abandoned and replaced by nine regional agricultural development corporations (RADC), consisting of an amalgamation of existing development corporations and the government extension services to function within the framework of the nine development regions of South Africa.
Massive gravity as a quantum gauge theory
Creators: name: Grigore, Dan Radu
name: Scharf, Gunter
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We present a new point of view on the quantization of the massive gravitational field, namely we use exclusively the quantum framework of the second quantization. The Hilbert space of the many-gravitons system is a Fock space ${\cal F}^{+}({\sf H}_{\rm graviton})$ where the one-particle Hilbert space ${\sf H}_{graviton}$ carries the direct sum of two unitary irreducible representations of the Poincaré group corresponding to two particles of mass $m > 0$ and spins 2 and 0, respectively. This Hilbert space is canonically isomorphic to a space of the type $Ker(Q)/Im(Q)$ where $Q$ is a gauge charge defined in an extension of the Hilbert space ${\cal H}_{\rm graviton}$ generated by the gravitational field $h_{μν}$ and some ghosts fields $u_μ, \tilde{u}_μ$ (which are vector Fermi fields) and $v_μ$ (which are vector field Bose fields.) Then we study the self interaction of massive gravity in the causal framework. We obtain a solution which goes smoothly to the zero-mass solution of linear quantum gravity up to a term depending on the bosonic ghost field. This solution depends on two real constants as it should be; these constants are related to the gravitational constant and the cosmological constant. In the second order of the perturbation theory we do not need a Higgs field, in sharp contrast to Yang-Mills theory.
description: 35 pages, no figure
Application d’une structure de génie civil au réseau d’une structure déployable spatiale
Creators: name: Maetz, Xavier
name: Quirant, Jérôme
name: Averseng, Julien
name: Sodki, Mehdi
Publisher: name: Academic Journal of Civil Engineering
Year: 2020

description: L’équipe SIGECO du Laboratoire de Mécanique et de Génie Civil de Montpellier (LMGC) conçoit et réalise des structures spatiales innovantes en collaboration avec le CNES. Un nouveau concept de structure déployable porteuse s’inspirant d’une structure de tenségrité a récemment été développé. Cette architecture est composée d’un anneau déployable qui met en tension un réseau dôme-câble dans le but de générer une surface parabolique. Une nouvelle géométrie de réseau dôme-câble est proposée permettant une meilleure distribution des efforts.
description: Academic Journal of Civil Engineering, Vol 38 No 1 (2020): Special Issue - RUGC 2020 Marrakech
The Rise and Fall of a Networked Society
Creators: name: Marsili, Matteo
name: Vega-Redondo, Fernando
name: Slanina, Frantisek
Publisher: name: arXiv
Year: 2003
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: We propose a simple model of the evolution of a social network which involves local search and volatility (random decay of links). The model captures the crucial role the network plays for information diffusion. This is responsible for a feedback loop which results in a first-order phase transition between a very sparse network regime and a highly-connected phase. Phase coexistence and hysteresis take place for intermediate value of parameters. We derive a mean-field theory which correctly reproduces this behavior, including the distribution of degree connectivity and the non-trivial clustering properties.
description: 5 pages 2 figures
Additional file 5 of pyCancerSig: subclassifying human cancer with comprehensive single nucleotide, structural and microsatellite mutational signature deconstruction from whole genome sequencing
Creators: name: Jessada Thutkawkorapin
name: Eisfeldt, Jesper
name: Tham, Emma
name: Nilsson, Daniel
Publisher: name: figshare
Year: 2020
Subjects: subject: Biochemistry
subject: Space Science
subject: Genetics
subject: FOS: Biological sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences
subject: Cancer
subject: 110309 Infectious Diseases
subject: FOS: Health sciences
subject: 60506 Virology

description: Additional file 5.
Spontaneous vectorization in the presence of vector field coupling to matter
Creators: name: Minamitsuji, Masato
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We examine the possibility of spontaneous vectorization in the vector-tensor theories with the vector conformal and disformal couplings to matter. We study the static and spherically symmetric solutions of the relativistic stars with the nontrivial profile of the vector field satisfying the boundary conditions $A_μ\to 0$ at the spatial infinity, where $A_μ$ represents the vector field. First, we study the linear perturbations about the general relativistic (GR) stellar solutions with the vanishing vector field $A_μ=0$. We show that the pure vector disformal coupling causes the ghost or gradient instability of the GR stars, indicating the breakdown of the hyperbolicity on the GR stellar backgrounds. On the other hand, the pure conformal coupling causes the tachyonic instability of the GR solutions and would lead to the spontanenous growth of the vector field toward the nontrivial solutions as in the manner of spontaneous scalarization in the scalar-tensor theories. We then construct the static and spherically symmetric solutions of the relativistic stars with $0$ and $1$ nodes of the vector field in the presence of the pure disformal coupling. We find that the properties of the solutions with the nontrivial vector field are similar to those of the generalized Proca theories. As in the mass-radius diagram the branches of the $0$ and $1$ node solutions are disconnected to that of the GR solutions in the lower density regimes, they may be formed from the selected choice of the initial conditions. Finally, we construct the $0$ node solutions in the case of the pure conformal coupling, and show that the branch of these solutions is connected to that of the GR solutions in both the low and high density regions and hence would arise spontaneously via the continuous evolution from the GR solutions.
description: 16 pages, 12 figures
Marcusenius angolensis
Creators: name: Kramer, Bernd
name: Skelton, Paul
name: Bank, Herman Van Der
name: Wink, Michael
Publisher: name: Zenodo
Year: 2007
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Actinopterygii
Osteoglossiformes
Mormyridae
Marcusenius
Marcusenius angolensis

description: Marcusenius angolensis (Boulenger, 1905)
(Figure 1B)
description: Published as part of Kramer, Bernd, Skelton, Paul, Bank, Herman Van Der & Wink, Michael, 2007, Allopatric differentiation in the Marcusenius macrolepidotus species complex in southern and eastern Africa: the resurrection of M. pongolensis and M. angolensis, and the description of two new species (Mormyridae, Teleostei), pp. 647-708 in Journal of Natural History 41 (9 - 12) on page 680, DOI: 10.1080/00222930701250987, http://zenodo.org/record/4658362
INCOME AND DEBT COMPONENTS OF FARM FINANCIAL STRESS: A NATAL EXAMPLE.
Creators: name: Leslie, J. R.
name: Darroch, M. A. G.
name: Leslie, J. R.
name: Darroch, M. A. G.
Publisher: name: Unknown
Year: 1992
Subjects: Agricultural Finance
Financial Economics

description: This study allocates farm financial stress into an income problem and a debt problem (leverage and interest rate) for a selected sample of Natal farms. This is done by comparing leverage and interest rates for farms experiencing financial stress (negative rate of return to equity) with a target leverage ratio and interest rate for those farms which are financially successful (positive rate of return to equity). The results show that some 65.4% of financial stress, for sample farms, is due to an income problem, 25.6% to leverage and 9.0% to an interest rate problem. Policies which alleviate the income problem will therefore be the most effective for these farms.
J/psi production via initial state radiation in e+ e- --> mu+ mu- gamma at an e+e- center-of-mass energy near 10.6 GeV
Creators: name: The BABAR Collaboration
name: Aubert, B.
Publisher: name: arXiv
Year: 2003
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We have used a study of the process e+e- --> mu+ mu- gamma at a center-of-mass energy near the Y(4S) resonance for a mu+ mu- invariant mass range near the J/psi mass to extract the cross section sigma(e+e- --> J/psi gamma --> mu+ mu- gamma). The data set, corresponding to an integrated luminosity of 88.4 fb-1, was collected using the BaBar detector at the PEP-II collider. We measure the product Gamma(J/psi --> e+e-)B(J/psi --> mu+ mu-) to be 0.330 +/- 0.008(stat) +/- 0.007(syst) keV. Using the world averages for B(J/psi --> mu+ mu-) and B(J/psi --> e+e-), we derive the J/psi electronic and total widths: Gamma(J/psi --> e+e-)=5.61+/-0.20 keV and Gamma=94.7+/-4.4 keV.
description: 8 pages, 4 postscript figues, submitted to Phys. Rev. D(Rapid Communications)
Understanding High Tc Superconductivity
Creators: name: Weng, Zheng-Yu
Publisher: name: arXiv
Year: 2003
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: I briefly review several key issues in understanding the cuprate superconductors from the point of view of doped-Mott-insulator. Then I present an effective low-energy theory and show that the phase diagram of such a model includes an antiferromagnetic (AF) phase, a superconducting state, and a pseudogap phase at low doping and low temperature, consistent with the experimental one. The dual topological gauge structure of this model is responsible for unifying these phases within a single framework with correct doping and temperature scales. Some unique predictions in such a model are also discussed.
description: 15 pages, 3 eps figures, references updated; invited talk at the International Symposium on Frontiers of Science in celebration of the 80th birthday of Prof. Chen Ning Yang
Cataclysmic Variables in the First Year of the Zwicky Transient Facility
Creators: name: Szkody, Paula
name: Dicenzo, Brooke
name: Ho, Anna Y. Q.
name: Hillenbrand, Lynne A.
name: van Roestel, Jan
name: Ridder, Margaret
name: Lima, Isabel DeJesus
name: Graham, Melissa L.
name: Bellm, Eric C.
name: Burdge, Kevin
name: Kupfer, Thomas
name: Prince, Thomas A.
name: Masci, Frank J.
name: Mroz, Przemyslaw J.
name: Golkhou, V. Zach
name: Coughlin, Michael
name: Cunningham, Virginia A.
name: Dekany, Richard
name: Graham, Matthew J.
name: Hale, David
name: Kaplan, David
name: Kasliwal, Mansi M.
name: Miller, Adam A.
name: Neill, James D.
name: Patterson, Maria T.
name: Riddle, Reed
name: Smith, Roger
name: Soumagnac, Maayanne T.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Using selection criteria based on amplitude, time and color, we have identified 329 objects as known or candidate cataclysmic variable (CVs) during the first year of testing and operation of the Zwicky Transient Facility (ZTF). Of these, 90 are previously confirmed CVs, 218 are strong candidates based on the shape and color of their light curves obtained during 3-562 days of observations, and the remaining 21 are possible CVs but with too few data points to be listed as good candidates. Almost half the strong candidates are within 10 deg of the galactic plane, in contrast to most other large surveys which have avoided crowded fields. The available Gaia parallaxes are consistent with sampling the low mass transfer CVs, as predicted by population models. Our followup spectra have confirmed Balmer/helium emission lines in 27 objects, with four showing high excitation HeII emission, including candidates for an AM CVn, a polar and an intermediate polar. Our results demonstrate that a complete survey of the galactic plane is needed to accomplish an accurate determination of the number of CVs existing in the Milky Way.
description: 27 pages, 9 figures, 3 tables
Additional file 4 of pyCancerSig: subclassifying human cancer with comprehensive single nucleotide, structural and microsatellite mutational signature deconstruction from whole genome sequencing
Creators: name: Jessada Thutkawkorapin
name: Eisfeldt, Jesper
name: Tham, Emma
name: Nilsson, Daniel
Publisher: name: figshare
Year: 2020
Subjects: subject: Biochemistry
subject: Space Science
subject: Genetics
subject: FOS: Biological sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences
subject: Cancer
subject: 110309 Infectious Diseases
subject: FOS: Health sciences
subject: 60506 Virology

description: Additional file 4.
A PERSPECTIVE ON PARTIAL AND TOTAL PRODUCTIVITY AS MEASURED AT TSB - AGRICULTURAL DIVISION
Creators: name: Botha, D. P.
name: Botha, D. P.
Publisher: name: Unknown
Year: 1992
Subjects: Agricultural and Food Policy
Productivity Analysis

description: Productivity measurement techniques can be categorized in partial and complete measurements depending on the technique used. Complete measurement requires the use of both physical and financial data in analysis and the possibility to reconcile back to the financial statements of the organisation. At farm production level partial measurements are normally used to measure the productivity of certain aspects in the production process. The danger exists that interpretation from partial measures may be biased and consequently lead to sub-optimum decisions. This may be the case were labour is substituted with machinery were the gain in labour productivity is not off set against the productivity loss in capital. The relevant importance of the available measurement techniques at the different hierarchical levels in the organisation, is indicated. From the discussion it will be evident that complete productivity analysis enhance a holistic approach towards business decision making. It is also important to follow a longer term orientation towards productivity measurement and improvement. Uncontrollable factors may have a negative effect on productivity in the short term. A trend line over time will indicate the success or failure of the organisation to reach productivity improvement.
Manifestação cultural no Felgar: requiem e  memórias passadas dos Poetas Populares
Creators: name: Carlos Seixas
Publisher: name: Revista Memória Rural
Year: 2023

description: Fazendo jus ao título ou ao principio norteador da presente revista, que evoca a memória  rural e nos induz a realizar a nobre tarefa da recolha e partilha de um qualquer quadro social com  a sua materialidade e imaterialidade subjacente, anima-nos, com este pequeno e modesto artigo de  investigação, dar a conhecer uma pequena parte dessa memória de outrora, invocando, para o efeito,  as memórias passadas de 10 poetas populares, todos naturais de Felgar nas centúrias dos sécs. XIX e  XX. Em comum, além de já terem todos falecido, deixaram obra poética, uma publicada, outra manuscrita em folhas delidas e avulsas, ou ainda, quanto dela, transmitida oralmente, tendo o campo ou o meio  rural como cenário predileto e á qual reconhecemos alguma valia e merecimento para ser recordada. 

Situando tais protagonistas no tempo e no espaço referido, fazendo micro - indagações, explorando e escavando pistas e sinais, divulgando dados biográficos e a variedade ou as especificidades dos temas abordados e o seu enquadramento contextual, cumprimos a nossa missão e, oxalá, a bem da cultura e da memória rural, fiquem resgatados do olvido.
DIE BEPALING VAN DIE REALITEITE VAN VOEDSELBEMARKING IN DIE KAAPSE PLAKKERGEMEENSKAPPE
Creators: name: Myburgh, A. S.
name: Myburgh, A. S.
Publisher: name: Unknown
Year: 1992
Subjects: subject: Community/Rural/Urban Development
subject: Marketing
subject: FOS: Economics and business

description: The availability and affordability of a community's food are to a large extent determined by the relevant food marketing system. The realities of food marketing in the squatter settlements of Cape Town are discussed. This segment of the market is almost exclusively served by the informal distributive trade within the area. A dispersed network of sphazas and fresh produce traders (meat, vegetables and fruit), well adapted to local conditions and the particular needs of the community, is in operation. The traders are economically fragile and their linkage with the First World agricultural marketing system is problematic.
Retraction Notice for Sullins, Rosik & Santero (2021). F1000 Research.
Creators: name: Editors, Journal
Publisher: name: figshare
Year: 2025
Subjects: classificationCode: 520303
subject: Counselling psychology

description: The journal retracts Sullins et al. (2021) based on anonymous reviews raising vague methodological critique, citing concerns "regarding the data underlying" this research" which are not mentioned. Neither review even examined the data. Not a single specific finding or analysis in the study or characteristic of the data is rebutted or even challenged.
Normal random matrix ensemble as a growth problem
Creators: name: Teodorescu, R.
name: Bettelheim, E.
name: Agam, O.
name: Zabrodin, A.
name: Wiegmann, P.
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: In general or normal random matrix ensembles, the support of eigenvalues of large size matrices is a planar domain (or several domains) with a sharp boundary. This domain evolves under a change of parameters of the potential and of the size of matrices. The boundary of the support of eigenvalues is a real section of a complex curve. Algebro-geometrical properties of this curve encode physical properties of random matrix ensembles. This curve can be treated as a limit of a spectral curve which is canonically defined for models of finite matrices. We interpret the evolution of the eigenvalue distribution as a growth problem, and describe the growth in terms of evolution of the spectral curve. We discuss algebro-geometrical properties of the spectral curve and describe the wave functions (normalized characteristic polynomials) in terms of differentials on the curve. General formulae and emergence of the spectral curve are illustrated by three meaningful examples.
description: 44 pages, 14 figures; contains the first part of the original file. The second part will be submitted separately
Spin 2 Quasinormal Modes in Generalized Nariai Spacetimes
Creators: name: Batista, Carlos
name: Venâncio, Joás
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: In this work we analytically obtain the quasinormal spectrum for the gravitational perturbation on a higher-dimensional generalization of the Nariai spacetime that is comprised of the direct product of the two-dimensional de Sitter space with several two-spheres. A key step in order to attain this result is to use a suitable basis for the angular functions depending on the rank of the tensorial degree of freedom that one needs to describe. Here we define such a basis, which is a generalization of the tensor spherical harmonics that is suited for spaces that are the product of several spaces of constant curvature.
description: 13 pages, 1 figure
FOOD DISTRIBUTION SYSTEMS IN THE URBAN INFORMAL MARKETS: THE CASE OF RED MEAT MARKETING IN THE WESTERN CAPE TOWNSHIPS AND INFORMAL SETTLEMENTS
Creators: name: Karaan, A. S. M.
name: Myburgh, A. S.
name: Karaan, A. S. M.
name: Myburgh, A. S.
Publisher: name: Unknown
Year: 1992
Subjects: subject: Community/Rural/Urban Development
subject: Food Consumption/Nutrition/Food Safety
subject: Marketing
subject: FOS: Economics and business

description: The market for agricultural/food products is increasingly becoming concentrated in the urban black townships and informal settlements. Most of the formal marketing systems are not suited to serve the township market, and consequently this sector experiences access problems which results in a largely inadequate supply. This situation threatens food security in the townships and informal settlements. The marketing vacuum left by the formal systems, however, provided entrepreneurs an opportunity to market food in this sector. This paper therefore deals with the situation where entrepreneurs started marketing red meat in the Cape urban townships. It largely describes the ground level activities of these traders whose operations are generally described as informal.