Relevant bibliographies by topics / Redistribution de sol

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Academic literature on the topic 'Redistribution de sol'

Author: Grafiati
Published: 4 June 2021
Last updated: 6 February 2022

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Journal articles on the topic "Redistribution de sol"

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Сениченков, И. Ю., Е. Г. Кавеева, В. А. Рожанский та ін. "Роль электрического поля в формировании режима отрыва плазмы токамака". Письма в журнал технической физики 44, № 6 (2018): 66. http://dx.doi.org/10.21883/pjtf.2018.06.45769.17085.

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AbstractModeling of the transition to the detachment of ASDEX Upgrade tokamak plasma with increasing density is performed using the SOLPS-ITER numerical code with a self-consistent account of drifts and currents. Their role in plasma redistribution both in the confinement region and in the scrape-off layer (SOL) is investigated. The mechanism of high field side high-density formation in the SOL in the course of detachment is suggested. In the full detachment regime, when the cold plasma region expands above the X -point and reaches closed magnetic-flux surfaces, plasma perturbation in a confined region may lead to a change in the confinement regime.
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Zhang, Min, Zhenfa Zi, Qiangchun Liu, et al. "Size Effects on Magnetic Properties ofNi0.5Zn0.5Fe2O4Prepared by Sol-Gel Method." Advances in Materials Science and Engineering 2013 (2013): 1–10. http://dx.doi.org/10.1155/2013/609819.

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Ni0.5Zn0.5Fe2O4particles with different particle sizes have been synthesized by sol-gel method. X-ray diffraction results show that all the samples are pure cubic spinel structure with their sizes ranging from 9 to 96 nm. The lattice constant significantly decreases with further increasing annealing temperature. The magnetic measurements show superparamagnetic nature below the particle size of 30 nm, while others show ferrimagnetic nature above the corresponding blocking temperature. The blocking temperature increases with the increase in particle size, which can be explained by Stoner-Wohlfarth theory. The saturation magnetization increases as the particle size increases, which can be explained by the cation redistribution on tetrahedral A and octahedral B sites and the domain wall motion. The variation of coercivity as a function of particle size is based on the domain structure.
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Wu, Jeffrey C. S., and Chih-Yang Yeh. "Sol-gel-derived photosensitive TiO2 and Cu/TiO2 using homogeneous hydrolysis technique." Journal of Materials Research 16, no. 2 (2001): 615–20. http://dx.doi.org/10.1557/jmr.2001.0088.

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Titania and copper-loaded titania were synthesized by an improved sol-gel method using a homogeneous hydrolysis technique. Unlike the conventional sol-gel procedure that added water directly, the esterification of anhydrous butanol and glacial acetic acid provided the hydrolyzing water. In addition, acetic acid also served as a chelating ligand to stabilize the hydrolysis-condensation process and minimize the agglomeration of titania. Fourier transform infrared spectra confirmed the presence of bidental ligand. The sol was dried, then calcined at 500°C to remove organics and transformed to anatase titania. Transmission electron microscopy revealed that the titania particles were uniform, and the particle size ranged from 10 to 25 nm. The band gaps of TiO2 and Cu/TiO2 ranged from 3.01 to 3.17 eV based on the diffusive reflective ultraviolet-visible spectrometry. X-ray photoelectron spectroscopy analysis showed a positive shift of binding energy of Ti2p3/2 and a negative shift of Cu 2p3/2 in Cu/TiO2. The redistribution of electric charge is due to the Schottky barrier of Cu and TiO2.
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Fontan, Jean-Marc, Benoît Lévesque, and Mathieu Charbonneau. "Les fondations privées québécoises : un champ de recherche émergent." Lien social et Politiques, no. 65 (September 30, 2011): 43–64. http://dx.doi.org/10.7202/1006025ar.

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L’émergence du capitalisme nord-américain est accompagnée d’un renouvellement des modalités de redistribution de la richesse. En complémentarité aux dispositifs publics et religieux se développe un mode privé de redistribution structuré autour d’organisations juridiquement incorporées comme des organisations sans but lucratif : les fondations privées à vocation philanthropique. Bien que leur existence remonte à l’Antiquité et que leur présence en sol canadien et québécois soit observable dès le début du xxe siècle, ce sujet a peu attiré l’attention des chercheurs canadiens et québécois. Après avoir situé le cadre global d’émergence et de développement de la philanthropie en Europe et des fondations privées aux États-Unis, l’article posera un état de situation très préliminaire sur les fondations privées au Canada et au Québec. Il se penchera sur les raisons qui expliquent le peu d’intérêt des chercheurs canadiens et québécois pour l’étude de la philanthropie et des fondations. Enfin, il présentera l’hypothèse selon laquelle il est important que la nouvelle sociologie économique se penche sur la philanthropie et les fondations publiques et privées afin d’en renouveler le cadre d’analyse.
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Mane, D. R., D. D. Birajdar, Swati Patil, Sagar E. Shirsath, and R. H. Kadam. "Redistribution of cations and enhancement in magnetic properties of sol–gel synthesized Cu0.7−x Co x Zn0.3Fe2O4 (0 ≤ x ≤ 0.5)." Journal of Sol-Gel Science and Technology 58, no. 1 (2010): 70–79. http://dx.doi.org/10.1007/s10971-010-2357-8.

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Kanno, Yoshinori. "Tetragonal-orthorhombic phase transformation and sintering behavior of KSbOSiO4 (isomorphous derivative of KTP)." Journal of Materials Research 9, no. 9 (1994): 2323–29. http://dx.doi.org/10.1557/jmr.1994.2323.

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Fine KSbOSiO4 (KSS) powders have been prepared by a sol-gel method starting from the system of TEOS, KSb(OH)6, H2O, C2H5OH, or mechanochemical mixing method with a stoichiometric mixture of amorphous silica and KSb(OH)6. The KSS crystallized sluggishly into a tetragonal symmetry in low temperature and transformed into an orthorhombic one in higher temperature, indicating the amorphous-like powder patterns in the intermediate step. This amorphization process could be related to some redistribution of the polysilicate network structures. The mechanochemical activation energy stored in the powder surface, as well as the coexisting matrix (KSbO3), retards the transformation. It was concluded that the KSS powders composed of high molecular weight siloxane polymers, which were formed by hydrolysis in the presence of a small amount of NH3 aqueous solution, showed higher sinterability. The sintering, where the calcining process was omitted, enabled the dense tetragonal-type ceramics stabilized at lower temperature, rather than higher temperature, to fabricate.
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Баковец, В. В., И. П. Долговесова, Т. Д. Пивоварова та М. И. Рахманова. "Фазовые превращения и особенности фотолюминесценции твердых растворов Gd-=SUB=-2(1-x)-=/SUB=-Tb-=SUB=-x-=/SUB=-Eu-=SUB=-x-=/SUB=-O-=SUB=-3-=/SUB=-". Физика твердого тела 62, № 12 (2020): 2147. http://dx.doi.org/10.21883/ftt.2020.12.50219.161.

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Solid solutions Gd2(1-x)TbxEuxO3, where x = 1 and 2.5 mol%, were obtained in an atmosphere of air and hydrogen by the sol-gel method followed by annealing at 700-1200 °C. It was found by XRD and IR spectroscopy that, during annealing, the solutions undergo chemical and phase transformations of the cubic modification into the monoclinic one and change the degree of crystallinity. Under some annealing conditions, the solid solution contains microinclusions of the Tb7O12:Eu3+ phase, which is not formed in a hydrogen atmosphere or at a high activator concentration of 2.5 mol% at 1200 oC. In accordance with these transformations, a redistribution of the photoluminescence activators Tb3+ and Eu3+ occurs over the centrosymmetric C3i, noncentrosymmetric C2 positions of the crystal lattice, and the surface states of Cs. As a result of these rearrangements, the parameters of the photoluminescence spectra change, which are associated with a change in the ways of transferring the excitation energy of the main radiative transitions of the photoluminescence activators Tb3+ and Eu3+.
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Баковец, В. В., И. П. Долговесова, Т. Д. Пивоварова та Л. А. Шелудякова. "Распределение катионов Tb-=SUP=-3+-=/SUP=- и Eu-=SUP=-3+-=/SUP=- в решетке C-Gd-=SUB=-2-=/SUB=-O-=SUB=-3-=/SUB=- по данным спектров фотолюминесценции и дальнего ИК". Физика твердого тела 63, № 12 (2021): 2162. http://dx.doi.org/10.21883/ftt.2021.12.51679.189.

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In this work, we investigated the features of the photoluminescence of C-Gd2(1-x)TbxEuxO3 luminophores at x = 1.0 and 2.5 mol%, which are associated with the distribution of Tb3+ and Eu3+ activator ions over the centrosymmetric C3i and noncentrosymmetric C2 positions of cations in the bixbyite lattice, as well as in the positions at the boundaries crystallites CS. We studied the phase transformations of the samples, changes in the morphology of crystallites, photoluminescence spectra, and spectra of the far infrared region 50–600 cm–1 with changes in the annealing modes of the initial products of the sol – gel synthesis Gd2(1 – x)TbxEux(OH)y(CO3)z · n(H2O) at temperatures of 900 and 1200oC in air and hydrogen. Correlations have been established between changes in the characteristics of the samples and the parameters of their annealing. Based on the analysis of these correlations, the redistribution of activators over the indicated cation positions was determined, and a model was proposed for identifying infrared absorption bands in accordance with the localization of activators along the cationic sublattices C3i and C2.
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Isogai, Masato, Alexander Veber, Maria Cicconi, Tomokatsu Hayakawa, and Dominique de Ligny. "Devitrification Behavior of Sol-Gel Derived ZrO2-SiO2 Rare-Earth Doped Glasses: Correlation between Structural and Optical Properties." Ceramics 1, no. 2 (2018): 274–86. http://dx.doi.org/10.3390/ceramics1020022.

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Optical and structural properties of glasses and glass-ceramics (GC) obtained by different heat-treatment of Tb and Tb-Yb doped sol-gel derived 30ZrO2-70SiO2 materials were investigated. A glass was formed after treatment at 700 °C whereas devitrification of the media after the treatment at 1000 and 1100 °C, led to the formation of GC containing up to three different crystalline phases, namely, tetragonal ZrO2, Yb-disilicate and cristobalite. The modification of the optical properties through the heat treatment was caused by redistribution of the rare earth elements (REE) among the different phases: both Tb and Yb entered the t-ZrO2 lattice, Yb can also be present in the form of a Yb2Si2O7 crystal. Devitrification led to an increase in Tb→Yb energy transfer efficiency as compared to the glass, though it was higher in the samples heat-treated at 1000 °C than in those treated at 1100 °C. The most intensive Yb3+ luminescence, induced by the energy transfer from the Tb3+ ion, was observed at the interface between t-ZrO2 and the glassy phases, due to the high concentration of REE in this area caused by the inability of ZrO2 to accept larger amounts of the REE. The mechanisms of the Tb→Yb energy transfer vary between different phases of the GC. The results obtained in this study are important for the development of spectral down-converters for potential solar energy applications based on Tb-Yb co-doped glass-ceramics.
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Gornick, Janet C., and Timothy M. Smeeding. "Redistributional Policy in Rich Countries: Institutions and Impacts in Nonelderly Households." Annual Review of Sociology 44, no. 1 (2018): 441–68. http://dx.doi.org/10.1146/annurev-soc-073117-041114.

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We review research on institutions of redistribution operating in high-income countries. Focusing on the nonelderly, we invoke the concept of the household income package, which includes income from labor, from related households, and from the state. Accordingly, we assess three institutional arenas: predistribution (rules and regulations that govern paid work), private redistribution (interhousehold transfers), and conventional public redistribution (operating via cash transfers and direct taxes). In each arena, we assess underlying policy logics, identify current policy controversies, summarize contemporary cross-national policy variation, and synthesize existing findings on policy effects. Our assessment of redistributional effects focuses on three core socioeconomic outcomes: low pay, child poverty, and income inequality. We close by assessing how the three institutional arenas perform collectively and by calling for further work on how these institutions change over time and how they affect subgroups differentially.
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Dissertations / Theses on the topic "Redistribution de sol"

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Des, Bourdes-Courtadeur Caroline. "Etude du transport de l'eau dans un sol labouré : modélisation 2D de l'infiltration et de la redistribution dans un sol à structure hétérogène." Paris, Institut national d'agronomie de Paris Grignon, 2002. http://www.theses.fr/2002INAP0014.

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L'objectif de ce travail est d'étudier le transport de l'eau dans un sol limoneux présentant une structure hétérogène. Nous avons caractérisé les propriétés hydriques des volumes de sol identifiés par le profil cultural. Dans la même parcelle, l'infiltration et la redistribution d'une pluie marquée au bromure sont suivies. Les résultats montrent des différences de propriétés hydriques entre les zones poreuses et tassées dans la couche labourée. Le traçage de l'eau montre la présence de flux préférentiels le long des passages de roues et une quasi absence de flux dans les zones tassées. Les flux sont importants et très hétérogènes dans les zones poreuses de l'entre-roues. Nous avons modélisé les flux (HYDRUS-2D) en considérant la géométrie des volumes et leurs propriétés hydriques. Le modèle ne reproduise pas les flux de façon quantitative mais il les reproduit de façon qualitative. Les résultats montrent que la structure de l'horizon influe sur les pertes d'eau vers la profondeur
This work is a study of water transport in a loamy soil presenting an heterogeneous structure. We characterized the hydraulic properties of the various soil recognized thought the cultivation profile. In the same plot, the infiltration and redistribution of a bromide rain were measured. Hydraulic properties differed between compacted zones and porous zones, in the ploughed layer between the wheel tracks. The bromide tracing showed preferential flows located at the border of the wheel tracks, and very limited flow within the wheel tracks. Water flows were very heterogeneous in the ploughed layer between the wheel tracks and mostly concentrated within the porous zones. We tried to reproduce the water fluxes using HYDRUS 2D model by accounting for the geometry of the soil volumes and their hydraulic properties. Water fluxes were well reproduced qualitatively. The simulations showed that the structure of the tilled layer has an important effect on
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Paskiewicz, Isabelle Berthelin Jacques. "Incidences d'interactions racines-microorganismes-état hydrique sur la mobilisation et redistribution de métaux dans un sol nickelifère." [S.l.] : [s.n.], 2006. http://www.scd.uhp-nancy.fr/docnum/SCD_T_2006_0042_PASKIEWICZ.pdf.

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ABLAIN, Frédérique. "Rôle des activités lombriciennes sur la redistribution des éléments traces métalliques issus de boue de station d'épuration dans un sol agricole." Phd thesis, Université Rennes 1, 2002. http://tel.archives-ouvertes.fr/tel-00007433.

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Ce travail de recherche traite de l'impact des activités lombriciennes sur (1) la qualité des eaux de percolation et notamment leur charge en éléments traces métalliques (Cu, Cd, Pb et Zn) et (2) de la redistribution de ces éléments au sein des microsites particuliers du sol (turricules et parois de galeries). Le rôle des lombriciens sur la dynamique des éléments traces métalliques est étudié au laboratoire sur deux espèces Lumbricus terrestris et Nicodrilus giardi en présence ou en l'absence de pollution métallique constituée par un apport de boue de station d'épuration. Les flux d'éléments traces métalliques via les eaux de percolation augmentent en présence de lombriciens. Cette augmentation est due à un processus physique induis par la présence de galeries lombriciennes qui vont favoriser l'écoulement des eaux. Les galeries sont des microsites particuliers ou se déroulent des processus physico-chimiques susceptibles de changer la spéciation des ETM et ainsi de favoriser leur entraînement via les eaux de percolation. Cependant au cours de notre expérimentation aucun processus physico-chimique n'a pu être mis en évidence concernant la qualité des eaux de percolation. La redistribution des ETM au sein des microsites est étudiée au moyen de deux techniques complémentaires : les extractions chimiques et le fractionnement granulo-densimétrique. Ces deux techniques mettent en exergue une redistribution des ETM au sein des microsites, impliquant un changement de spéciation vers des espèces plus labiles. Deux types de redistributions sont identifiés : • Une redistribution liée au comportement alimentaire du ver qui va sélectionner des particules de sol plus ou moins contaminées et ainsi déterminer la concentration et la distribution des ETM au sein des turricules et galeries. • Une redistribution « physico-chimique » liée aux propriétés particulières des microsites (variation de pH, taux d'argile, ...). La redistribution physico-chimique est dans le cadre de nos expérimentations le plus souvent masquée par la redistribution dite « alimentaire ». Ce travail de recherche traite de l'impact des activités lombriciennes sur (1) la qualité des eaux de percolation et notamment leur charge en éléments traces métalliques (Cu, Cd, Pb et Zn) et (2) de la redistribution de ces éléments au sein des microsites particuliers du sol (turricules et parois de galeries). Le rôle des lombriciens sur la dynamique des éléments traces métalliques est étudié au laboratoire sur deux espèces Lumbricus terrestris et Nicodrilus giardi en présence ou en l'absence de pollution métallique constitué par un apport de boue de station d'épuration. Les flux d'éléments traces métalliques via les eaux de percolation augmentent en présence de lombriciens. Cette augmentation est due à un processus physique induis par la présence de galeries lombriciennes qui va favoriser l'écoulement des eaux. Les galeries sont des microsites particuliers ou se déroulent des processus physico-chimiques susceptibles de changer la spéciation des ETM et ainsi de favoriser leur entraînement via les eaux de percolation. Cependant au cours de notre expérimentation aucun processus physico-chimique n'a pu être mis en évidence concernant la qualité des eaux de percolation. La redistribution des ETM au sein des microsites est étudiée au moyen de deux techniques complémentaires : les extractions chimiques et le fractionnement granulo-densimétrique. Ces deux techniques mettent en exergue une redistribution des ETM au sein des microsites, impliquant un changement de spéciation vers des espèces plus labile. Deux types de redistribution sont identifiés : • Une redistribution liée au comportement alimentaire du ver qui va sélectionner des particules de sol plus ou moins contaminées et ainsi déterminer la concentration et la distribution des ETM au sein des turricules et galeries. • Une redistribution « physico-chimique » lié aux propriétés particulières des microsites (variation de pH, taux d'argile, ...).
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Ablain, Frédérique. "Rôle des activités lombriciennes sur la redistribution des éléments traces métalliques issus de boue de station d'épuration dans un sol agricole /." Rennes : Éd. des Géosciences Rennes, 2004. http://catalogue.bnf.fr/ark:/12148/cb399556780.

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Ablain, Frédérique. "Rôle des activités lombriciennes sur la redistribution des éléments traces métalliques issus de boue de station d'épuration dans un sol agricole." Rennes 1, 2002. https://tel.archives-ouvertes.fr/tel-00007433.

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Ce travail de recherche traite de l’impact des activités lombriciennes sur (1) les teneurs éléments traces métalliques des eaux de percolation et (2) de la redistribution de ces éléments au sein des microsites particuliers : turricules et parois de galeries. Cette étude est réalisée au laboratoire sur deux espèces Lumbricus terrestris et Nicodrilus giardi. Les flux d’éléments traces métalliques via les eaux de percolation augmentent en présence de lombriciens. Cette augmentation est due à la présence de galeries lombriciennes qui va favoriser le drainage. La redistribution des éléments traces métalliques dans les microsites est mise en évidence par deux techniques complémentaires : les extractions chimiques et le fractionnement granulo-densimétrique. Deux types de redistribution sont identifiés : une redistribution liée au comportement alimentaire du ver et une redistribution ± physico-chimique α lié aux propriétés particulières des microsites.
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Follain, Stéphane. "Effet du réseau bocager sur l'organisation des sols. Redistributions des sols et stockage en carbone organique." Phd thesis, Agrocampus - Ecole nationale supérieure d'agronomie de rennes, 2005. http://tel.archives-ouvertes.fr/tel-00130432.

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L'effet du réseau bocager sur l'organisation des sols à l'échelle d'un paysage reste mal connu, car la majorité des études ont été menées en deux dimensions, en se limitant souvent à des contextes de talus perpendiculaires à la ligne de plus grande pente. L'extrapolation des résultats ainsi obtenus à l'ensemble du paysage, est de ce fait difficile et conduit à une mésestimation de l'impact du bocage sur les sols.
Les objectifs de ce travail étaient de comprendre et de quantifier à l'échelle d'un paysage bocager, l'effet du système talus/haie sur l'organisation des sols et sur les stocks de carbone organique associés, ainsi que de décrire la dynamique des processus spatiaux qui ont conduit aux organisations observées.
Pour y parvenir, la démarche adoptée a combiné trois approches complémentaires. Tout d'abord, nous avons conduit une étude de terrain dans un paysage bocager historiquement documenté et offrant des conditions topo-paysagères contrastées avec pour but une caractérisation spatiale de l'effet du réseau bocager qui prenne en compte l'action de l'homme et la nature tridimensionnelle de la couverture pédologique à l'échelle du paysage.
Ensuite, nous avons couplé des approches de datation relative (analyse de documents historiques et géométrie des horizons) et absolue (carbone-14, césium-137), complémentaires des approches spatiales, pour dater les sols et analyser la dynamique des processus à l'origine des modifications de leur
organisation spatiale.
Cette prise en compte de la dimension temporelle était nécessaire pour améliorer notre compréhension des processus de redistribution en sol et nous permettre d'engager une modélisation spatiale et temporelle simulant des évolutions du paysage bocager en fonction de différents scénarii d'occupation des sols.
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Chartin, Caroline. "Effet de l'évolution du parcellaire agricole sur la redistribution des sols et la morphologie des versants cultivés - exemple du Sud-Ouest du bassin parisien." Phd thesis, Université François Rabelais - Tours, 2011. http://tel.archives-ouvertes.fr/tel-00643554.

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L'évolution historique des types et techniques de production agricole a causé celle de l'organisation paysagère, via les parcellaires notamment. Les bordures de parcelles créent des discontinuités dans les processus d'érosion-dépôt de sol. L'objectif est ici de comprendre l'effet du parcellaire et de son évolution sur la distribution actuelle des sols et la morphologie des versants. Un versant cultivé (16 ha) dans le SW du Bassin Parisien a été étudié. La distribution spatiale de figures morphologiques linéaires et de l'épaisseur des sols a été analysée. Les deux types de figures identifiés correspondent à des épaississements de sols (dépôts) induits par des bordures de parcelles, pérennes depuis plusieurs siècles pour les premières, et disparues en 1967 (remembrement) pour les secondes. Ces épaississements ont été cartographiés grâce à une analyse statistique (CART) de la morphologie du versant. L'étude de traceurs granulométriques et minéralogiques (SEDI) a permis d'identifier les processus d'érosion-dépôt impliqués. La solifluxion périglaciaire puis le ruissellement auraient affecté l'ensemble du versant avant la pérennisation d'un parcellaire. Puis, des processus hydriques et aratoires ont agi dans des unités (parcelles) fixées par des bordures : les plus pérennes (1000 ans) montrent les dépôts les plus marqués (banquettes). La distribution spatiale du 137Cs et sa conversion en taux d'érosion (modélisation numérique) ont permis d'évaluer l'implication relative des processus hydriques (15%) et aratoires (85%) depuis 1954. Le remembrement parcellaire de 1967 s'avère avoir favorisé l'érosion des sols, convertissant des zones de rétention en zones sources (ondulations).
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Chabert, Clément. "Modélisation distribuée de l’aléa érosif dans le bassin versant de la Loire et nouvelles perspectives de validation Soil erosion hazard map for river basin managers: An example for the water bodies of the Loire river basin (France)." Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLV092.

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L’érosion des sols s’est accélérée après la seconde guerre mondiale dans les grandes plaines cultivées du nord-ouest de l’Europe. Ce phénomène s’explique par une modification des paysages et des pratiques agricoles. Pour pouvoir lutter efficacement contre l’érosion, il est important de quantifier ce processus d’érosion, de transfert et de dépôt des sédiments au sein de grands bassins versants, ainsi que leur redistribution spatiale. Ces estimations sont cruciales pour permettre d’atteindre les objectifs fixés par la Directive-Cadre Européenne sur l’Eau, notamment le bon état écologique des cours d’eau. Cette thèse a pour objectif de quantifier les processus d’érosion et de redistribution de sédiments sur plusieurs décennies et à plusieurs échelles spatiales au sein du bassin de la Loire (117 000 km²). Dans un premier temps, le modèle d’évaluation de l’aléa érosif MESALES a été amélioré pour prendre en compte les dernières bases de données disponibles (évolution du couvert végétal, érosivité des pluies, texture de surface des sols). Les résultats ont été intégrés par masse d’eau afin d’identifier les sous-bassins versant les plus exposés au risque érosif. L’amélioration du modèle a conduit à une modification des valeurs d’aléa dans la moitié des masses d’eau du bassin de la Loire. Dans un second temps, le potentiel de la mesure des inventaires de césium-137 (137Cs) dans les sols pour valider les sorties spatialisées des modèles d’érosion a été étudié. Une carte des retombées initiales de ce produit de fission émis par les essais thermonucléaires atmosphériques des années 1960 a tout d’abord été produite. Pour y parvenir, une base de données de sites de référence a été élaborée en combinant plusieurs banques d’échantillons existantes complétées par des prélèvements réalisés dans le cadre de la thèse. La spatialisation en tout point du bassin versant a été possible en utilisant principalement les données de précipitation sur la période 1960-1964 comme co-variables, ce qui confirme l’absence de retombées significatives de 137Cs faisant suite à l’accident de Tchernobyl dans cette région. Ensuite, les inventaires de 137Cs ont été mesurés dans l’ensemble des 478 profils de sols collectés dans le cadre du Réseau de Mesures de la Qualité des Sols (RMQS) et les taux de redistribution de sol moyens sur la période 1954–2008 ont été calculés à partir du modèle proportionnel. Les résultats montrent une sur-représentation des sites d’accumulation parmi les sites RMQS et la difficulté d’identifier des co-variables permettant de spatialiser les taux de redistribution de sol à cette échelle à partir de ce type de réseau de mesure destiné à cartographier les propriétés des sols plutôt que leur mouvement au sein du paysage. Enfin, un sous-bassin versant de plaine intensivement cultivé (bassin de l’étang de Brosse, Indre-et-Loire, 24 km²) a été sélectionné. L’évolution de l’occupation des sols et des précipitations au cours de la période 1959–2010 a été reconstruite pour modéliser l’érosion dans le bassin avec le modèle événementiel WaterSed. Les sorties du modèle ont été confrontées aux taux d’érosion reconstruits à partir de l’analyse et la datation de carottes sédimentaires collectées dans l’étang à l’exutoire du bassin. Les résultats montrent une bonne corrélation entre les valeurs modélisées et celles issues des carottages. Ceci a permis de mettre en évidence et de distinguer l’effet anthropique, qui gouverne les grandes tendances d’évolutions des taux d’érosion sur 50 ans et l’effet climatique qui explique les variabilités saisonnières. Ces travaux de thèse montrent les potentialités et les limites associées à l’utilisation des dernières banques de données et d’échantillons disponibles pour modéliser et reconstruire les taux d’érosion des sols à plusieurs échelles spatiales et temporelles au sein de grands bassins hydrographiques qui constituent les unités de gestion privilégiées des masses d’eau au sein de l’Union Européenne
Soils erosion has accelerated after WWII in the cultivated plains of Northwestern Europe. This phenomenon is explained by the modification of landscapes and agricultural practices. To combat erosion in an efficient way, it is crucial to quantify the erosion, transfer and deposition processes within large basins, as well as their spatial redistribution. These estimations are important in order to meet the guidelines required by the European Water Framework Directive, including the ecological good status of water bodies. The objective of this thesis is to quantify erosion processes and sediment redistribution during the last several decades and across multiple spatial scales within the Loire River basin (117,000 km²). First, the erosion hazard assessment model MESALES was improved to include the latest input databases available (reflecting the evolution of vegetation cover, rainfall erosivity and soil surface texture). The results were integrated at the scale of water bodies to identify those sub-catchments that were the most exposed to erosion. The improvement of the model led to a modification of the hazard estimation in half of the water bodies in the Loire River basin. Second, the potential of measuring caesium-137 (137Cs) inventories in soils to validate the spatially-distributed erosion model outputs was investigated. A map of the initial fallout of this fission product produced by atmospheric thermonuclear tests in the 1960s was first created. To do so, a data base of undisturbed reference sites was developed by combining several existing samples’ banks, and additional samples collected during the thesis. The spatial distribution of initial fallout across the entire basin was achieved through the use of rainfall data corresponding to the 1960-1964 period as covariates, which confirms the lack of significant 137Cs fallout following the Chernobyl accident in this region. Then, the 137Cs inventories were measured in all the 478 soils profiles collected in the framework of the Soil Quality Monitoring Network (RMQS in French). The mean soil redistribution rates of the 1954-2008 period were calculated using the proportional model. The results showed an over-representation of accumulation sites among the RMQS’ sites and the difficulty to identify covariates allowing to map the spatial patterns of soil redistribution at this scale from this type of monitoring network intended to map soil properties rather than their movement across the landscape. Finally, a subcatchment was selected in an intensively culivated plain (Brosse, Indre-et-Loire, 24 km²). The evolution of land cover and rainfall during the 1959-2010 period was reconstructed to model erosion in this catchment with the event-based WaterSed model. The outputs were confronted to those erosion rates estimated based on the analysis and dating of sediment core samples collected in the pond at the outlet. The results showed a good correlation between the model outputs and the erosion rates estimated from the cores. These results permitted to distinguish between the anthopogenic effect, which governs the general erosion trends across the five decades, from the climatic influence, which explains the seasonal variability. This thesis demonstrated the possibilities and the limitations associated with the use of the latest data bases and sample banks available to model and reconstruct soil erosion rates at multiple spatial and temporal scales within large river basins, which constitute the optimal management units in the European Union
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Davary, Kamran. "Soil moisture redistribution modeling with artificial neural networks." Thesis, McGill University, 2001. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=36905.

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This study sought to investigate the application of artificial neural networks (ANN) and fuzzy inference systems (FIS) to variably saturated soil moisture (VSSM) redistribution modelling. An enhanced approach to such modelling, that lessens computation costs, facilitates input preparation, handles data uncertainty, and realistically simulates soil moisture redistribution, was our main objective.
An initial review of existing soil hydrology models provided greater insight into current modelling challenges and a general classification of the models. The application of AI techniques as alternative tools for soil hydrology modelling was explored.
A one-dimensional (1D) model based on ANN and FIS was developed. To estimate fluxes more accurately, multiple ANNs were trained and combined by way of an FIS. The main body of the model employed the ANN-FIS module to model soil moisture redistribution throughout the profile. When tested against the SWAP93 model, the ANN-FIS model gave a good match and maximum error of <8%; however, it did not show a notable computation cost shift.
The investigation proceeded with development of another ANN-based 1D modelling approach. This time, the soil profile or flow region, regardless of its depth, was divided into ten equal parts (compartments). The ANN was trained to estimate moisture patterns for a whole soil profile, from the previous day's soil moisture pattern and boundary conditions, and the current day's boundary conditions. The model was tested against SWAP93 where an average SCORE of 90.4 indicated a good match. The computation cost of the ANN-based model was about one-third that of SWAP93.
At this point the study sought to develop a 3D modelling approach. The ANN was trained to estimate the nodal soil moisture changes through time under the influence of six neighbouring nodes (in a 3D space, two on each axis). The model's accuracy was tested against the SWMS-3D model. An average SCORE of 91 and a 15-fold decrease in computation costs showed a quite acceptable performance. Results suggest that this approach is potentially capable of realistically modelling 3D VSSM redistribution with less computation time.
Finally, pros and cons of these ANN-based modelling approaches are compared and contrasted, and some recommendations on future work are given.
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Morrison, Jason T. "Heavy metal redistribution in soils using compost as a soil amendment." Morgantown, W. Va. : [West Virginia University Libraries], 2000. http://etd.wvu.edu/templates/showETD.cfm?recnum=1307.

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Thesis (M.S.)--West Virginia University, 2000.
Title from document title page. Document formatted into pages; contains vii, 38 p. : ill. (some col.). Vita. Includes abstract. Includes bibliographical references (p. 34-36).
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Books on the topic "Redistribution de sol"

1

Owens, P. N., and A. J. Collins, eds. Soil erosion and sediment redistribution in river catchments: measurement, modelling and management. CABI, 2006. http://dx.doi.org/10.1079/9780851990507.0000.

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1966-, Owens Philip N., and Collins A. J, eds. Soil erosion and sediment redistribution in river catchments. CABI Pub., 2006.

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Lara-Millán, Armando. Redistributing the Poor. Oxford University Press, 2021. http://dx.doi.org/10.1093/oso/9780197507896.001.0001.

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This book argues that the changes taking place in the United States’ largest jails and public hospitals have been drastically misunderstood. And more generally, the way that states govern urban poverty at the turn of the twenty-first century has been misunderstood as well. It is widely believed that because US society has divested in public health, the sick and poor now find themselves subject to powerful criminal justice institutions. Rather than focus on the underinvestment of health and overinvestment of criminal justice, this book argues that the fundamental problem of the state is a persistent crisis between budgetary catastrophe and expansive new legal rules. Redistributing the Poor pushes the reader to think about the circulation of people for the purposes of generating absent revenue, absolving new legal demands, and projecting illusions that crisis have been successfully resolved. This book delves into the heart of the state: the day-to-day operations of the largest hospital and jail system in the world. It is only by centering the state’s use of redistribution that one can understand how certain forms of social suffering—the premature death of mainly poor, people of color—are not a result of the state’s failure to act, but instead are the necessary outcome of so-called successful policy.
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(Editor), P. N. Owens, and A. J. Collins (Editor), eds. Soil Erosion and Sediment Redistribution in River Catchments: Measurement, Modelling and Management (Cabi Publishing). CABI, 2006.

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Vellidis, George. Measured and simulated soil water redistribution and extraction patterns of drip-irrigated tomatoes above a shallow water table. 1989.

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Layman, Daniel. Locke Among the Radicals. Oxford University Press, 2020. http://dx.doi.org/10.1093/oso/9780190939076.001.0001.

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During the nineteenth century, the Lockean radicals—Thomas Hodgskin, Lysander Spooner, John Bray, and Henry George—picked up the loose ends of Locke’s property theory and wove them into two competing strands. Each strand addressed problems of liberty and equality that were emerging with industrial capitalism, but each did so in a different way. In one camp, Hodgskin and Spooner—the libertarian radicals—argued that the world of resources is common to all people only in the negative sense of being originally unowned by anyone. According to them, there are no just grounds for state redistribution except to correct past injustices, and governments are typically little more than thieving and oppressive gangs. In the other camp, Bray and George—the egalitarian radicals—held that all people have a positive claim to share equally in the world’s resources. According to them, states should ensure, through redistributive taxation and other progressive policies, that our institutions respect this common right. Locke Among the Radicals tells the forgotten story of the Lockean radicals and the role they played in addressing problems latent in Locke’s theory. In addition, it argues that some of the radicals’ insights can provide a blueprint for a form of liberal distributive justice that is applicable today.
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Linarelli, John, Margot E. Salomon, and Muthucumaraswamy Sornarajah. Human Rights. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198753957.003.0007.

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This chapter interrogates whether international human rights law has settled for preventing and mitigating deprivations without changing the terms under which that suffering is not only made possible but is reproduced, including by reinforcing the structural features that engender it. Human rights exist within an extreme capitalist global economy and their deployment needs to be considered against that backdrop, and not merely as a discrete, benevolent response to it. Taking the inquiry one step further, this chapter considers the ways in which human rights work against a transformative or radical agenda, to the detriment of their own aims and objectives. It explores how international human rights law is not limited to redistribution, but has not gone so far as to effecting ‘predistribution’, that is, making international law just, ex ante, in a structural sense. Moreover, its demands for redistribution in order to realize human rights can also serve to drive the possibility of predistribution further away.
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R, Gardner Wilford, Schulz R. K, U.S. Nuclear Regulatory Commission. Office of Nuclear Regulatory Research. Division of Regulatory Applications., and University of California, Berkeley. Dept. of Soil Science., eds. Three dimensional redistributions of tritium from a point of release into a uniform unsaturated soil: A deterministic model for tritium migration in an arid disposal site. Division of Regulatory Applications, Office of Nuclear Regulatory Research, U.S. Nuclear Regulatory Commission, 1993.

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Dinces, Sean, and Christopher Lamberti. Sports and Blue-Collar Mythology in Neoliberal Chicago. Edited by Larry Bennett, Roberta Garner, and Euan Hague. University of Illinois Press, 2017. http://dx.doi.org/10.5406/illinois/9780252040597.003.0006.

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This chapter argues that the growing obsession of sportswriters in recent decades with so-called “blue-collar” fan bases and “blue-collar” professional athletes has abetted the larger project of neoliberalism by masking and justifying economic inequality in cities like Chicago. The ongoing insistence of Chicago’s sports pages that local teams enjoy the support of “blue-collar” fan bases erases successful efforts by teams to price out the working-class by increasingly catering to affluent fans on the winning side of the upward redistribution of wealth. Moreover, the relatively recent trend of local journalists labeling Chicago’s professional, millionaire athletes as “blue-collar” encapsulates the broader trend within the mainstream media of discussing class as a matter of personal style rather than a matter of material circumstance.
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Samuel, Boris. Illegal Prices. Oxford University Press, 2017. http://dx.doi.org/10.1093/oso/9780198794974.003.0014.

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Between 2005 and 2010, Mauritania and Guadeloupe faced massive social mobilizations against the high cost of living. The widespread use of illegal practices was blamed for the unjust pricing of some of the most important consumer goods. While state responses to illegality had limited success, the interfaces between legality and illegality in markets appeared to shape social and political relations. In Guadeloupe, a wave of audits responded to the social demands for transparency and the unveiling of illegal practices. But illegalities remained largely unsanctioned, enabling the continued coexistence of legality and illegality in price formation. In Mauritania, public interventions were necessary to contain the social and political consequences of price hikes. But circumvention of the rules was so common in the public administration that fraudulent practices characterized the implementation of such social programs too. Illegal market transactions became one of the means by which the government organized redistribution.
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Book chapters on the topic "Redistribution de sol"

1

Novák, Viliam, and Hana Hlaváčiková. "Redistribution of Water in Homogeneous Soil." In Applied Soil Hydrology. Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-030-01806-1_11.

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Jakab, Gergely, Klaudia Kiss, Zoltán Szalai, Nóra Zboray, Tibor Németh, and Balázs Madarász. "Soil Organic Carbon Redistribution by Erosion on Arable Fields." In Soil Carbon. Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-04084-4_30.

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Reichardt, Klaus, and Luís Carlos Timm. "Water Redistribution After Infiltration into the Soil." In Soil, Plant and Atmosphere. Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-19322-5_12.

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Churchman, G. Jock, Andrew Noble, Glenn Bailey, David Chittleborough, and Richard Harper. "Clay Addition and Redistribution to Enhance Carbon Sequestration in Soils." In Soil Carbon. Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-04084-4_34.

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Jacques, D., J. Vanderborght, D. Mallants, B. P. Mohanty, and J. Feyen. "Analysis of Solute Redistribution in Heterogeneous Soil." In geoENV I — Geostatistics for Environmental Applications. Springer Netherlands, 1997. http://dx.doi.org/10.1007/978-94-017-1675-8_23.

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Vanderborght, J., D. Jacques, D. Mallants, P. H. Tseng, and J. Feyen. "Analysis of Solute Redistribution in Heterogeneous Soil." In geoENV I — Geostatistics for Environmental Applications. Springer Netherlands, 1997. http://dx.doi.org/10.1007/978-94-017-1675-8_24.

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Chappell, A., and M. A. Oliver. "Analysing Soil Redistribution in South-West Niger." In Geostatistics Wollongong’ 96. Springer Netherlands, 1997. http://dx.doi.org/10.1007/978-94-011-5726-1_28.

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Zaman, M., K. Kleineidam, L. Bakken, et al. "Direct and Indirect Effects of Soil Fauna, Fungi and Plants on Greenhouse Gas Fluxes." In Measuring Emission of Agricultural Greenhouse Gases and Developing Mitigation Options using Nuclear and Related Techniques. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-55396-8_5.

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AbstractSoils harbour diverse soil faunaand a wide range of soil microorganisms. These fauna and microorganisms directly contribute to soil greenhouse gas (GHG) fluxes via their respiratory and metabolic activities and indirectly by changing the physical, chemical and biological properties of soils through bioturbation, fragmentation and redistribution of plant residues, defecation, soil aggregate formation, herbivory, and grazing on microorganisms and fungi. Based on recent results, the methods and results found in relation to fauna as well as from fungi and plants are presented. The approaches are outlined, and the significance of these hitherto ignored fluxes is discussed.
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Litovchenko, V. G., and A. A. Efremov. "Computer Simulation of Oxygen Redistribution in SOI Structures." In Perspectives, Science and Technologies for Novel Silicon on Insulator Devices. Springer Netherlands, 2000. http://dx.doi.org/10.1007/978-94-011-4261-8_14.

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Essbaumer, Elisabeth. "Mindern bessere Aufstiegschancen den Wunsch nach mehr Umverteilung?" In Die Wirtschaft im Wandel. Springer Fachmedien Wiesbaden, 2021. http://dx.doi.org/10.1007/978-3-658-31735-5_25.

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ZusammenfassungZu starke Ungleichheit gefährdet den Zusammenhalt in der Gesellschaft. Die Politik soll möglichst allen eine angemessene Teilhabe am gemeinsamen Wohlstand sichern. Aber Ungleichheit unterliegt einem steten Wandel. Wer in jungen Jahren aus knappen Verhältnissen startet, mag nach erfolgreicher Karriere zu den Spitzenverdienern gehören. Und wer daran glaubt, bald selbst zu den Reichen zu gehören, hat womöglich weniger Verlangen danach, den eigenen Aufstieg mit progressiven Steuern und mehr Umverteilung zu erschweren. Wie weit klaffen Wahrnehmung und Wirklichkeit der Aufstiegschancen auseinander, und wie bestimmen die wahrgenommenen Aufstiegschancen die politische Unterstützung für mehr oder weniger Umverteilung?Alesina, Alberto, Stantcheva, Stefanie and Edoardo Teso (2018), Intergenerational Mobility and Preferences for Redistribution, American Economic Review 108(2), 521–554.
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Conference papers on the topic "Redistribution de sol"

1

Jude Liu and R. L. Kushwaha. "Modeling of Soil Redistribution by Sweeps." In 2005 Tampa, FL July 17-20, 2005. American Society of Agricultural and Biological Engineers, 2005. http://dx.doi.org/10.13031/2013.18828.

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Orkhonselenge A. "Soil Erosion and Sediment Redistribution Estimated From Soil Geochemical Activity." In International Symposium on Erosion and Landscape Evolution (ISELE), 18-21 September 2011, Anchorage, Alaska. American Society of Agricultural and Biological Engineers, 2011. http://dx.doi.org/10.13031/2013.39300.

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Krishnamohan, Srivathsan, and Nihar Mahapatra. "Slack redistribution in pipelined circuits for enhanced soft-error rate reduction." In 2008 IEEE International SOC Conference (SOCC). IEEE, 2008. http://dx.doi.org/10.1109/socc.2008.4641502.

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Green,, Russell A., C. Guney Olgun, and Kord J. Wissmann. "Shear Stress Redistribution as a Mechanism to Mitigate the Risk of Liquefaction." In Geotechnical Earthquake Engineering and Soil Dynamics Congress IV. American Society of Civil Engineers, 2008. http://dx.doi.org/10.1061/40975(318)115.

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Su, Z. A., and J. H. Zhang. "Effects of Tillage Erosion on Soil Redistribution in a Purple Soil with Steep Sloping Terraces." In 2010 International Conference on Management and Service Science (MASS 2010). IEEE, 2010. http://dx.doi.org/10.1109/icmss.2010.5577125.

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Jayakrishnan, Mini, Alan Chang, Jose Pineda De Gyvez, and Kim Tae Hyoung. "Slack-aware timing margin redistribution technique utilizing error avoidance flip-flops and time borrowing." In 2015 IFIP/IEEE International Conference on Very Large Scale Integration (VLSI-SoC). IEEE, 2015. http://dx.doi.org/10.1109/vlsi-soc.2015.7314409.

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Fagert, Jonathon, Bin Zhang, Quan Gao, and Xiong (Bill) Yu. "Sensor for Detection of Earthquake-Induced Void Redistribution in Multilayered Soil System." In Geo-Congress 2014. American Society of Civil Engineers, 2014. http://dx.doi.org/10.1061/9780784413272.119.

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Wacha, Kenneth, Thanos Papanicolaou, and Christopher Wilson. "Redistribution Effects on Changes in Soil Carbon Storage Potential in Intensely Managed Landscapes." In World Environmental and Water Resources Congress 2014. American Society of Civil Engineers, 2014. http://dx.doi.org/10.1061/9780784413548.127.

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Pliopaite Bataitiene, Ingrida, and Renata Mikalauskiene. "INVESTIGATION OF REDISTRIBUTION ARTIFICIAL (137Cs, 90Sr) AND NATURAL (40K) RADIOISOTOPES IN DIFFERENT USAGE SOIL." In RAD Conference. RAD Association, 2016. http://dx.doi.org/10.21175/radproc.2016.12.

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Gao, Quan, Yang Yang, and Xiong (Bill) Yu. "A New Approach to Measure Water Film Due to Void Redistribution in Layered Soil." In IFCEE 2015. American Society of Civil Engineers, 2015. http://dx.doi.org/10.1061/9780784479087.104.

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