985 research outputs found
Analysis of Mathieu Equation Stable Solutions in the First Zone of Stability
No full textAbstractThe paper presents the results of a homogeneous Mathieu equation studies. Mathieu equation solutions are oscillations, modulated in amplitude and frequency. In the computational experiments we found dependences of the given oscillations on the ratio of the coefficients. These dependences are shown in graphs that can be used for an approximate estimation of the Mathieu equation solutions without integration
Pensar las escalas para pensar las luchas: Autor: Mathieu UHEL
No full textA través de un título sugerente, “pensar las escalas para pensar las luchas”, Mathieu Uhel entreteje la construcción teórico-crítica del concepto escala, generada por la geografía radical anglosajona de finales del siglo XX, con la necesidad/utilidad práctica de la escala para concienciar las luchas sociales. El artículo cumple un doble propósito: por un lado, delinear los elementos de lectura sobre el concepto escala; y, con ello, promover la atención de esta problemática en las luchas contemporáneas. En un primer apartado, Uhel ubica las discusiones académicas en torno a la escala, como herramienta metodológica útil para comprender la complejidad de las sociedades capitalistas; en el segundo apartado, el autor avanza la exposición en torno al contexto de la dimensión escalar del imperialismo capitalista; finalmente, el autor se centra en el rol de la actividad política a escala nacional en la tensa relación entre las imposiciones del capital y la lucha social.Por meio de um título sugestivo, “pensando escalas para pensar lutas”, Mathieu Uhel entrelaça a construção teórico-crítica do conceito de escala, gerado pela geografia radical anglo-saxônica do final do século XX, com a necessidade / utilidade prática escala para aumentar a consciência das lutas sociais. O artigo tem um duplo propósito: por um lado, delinear os elementos de leitura sobre o conceito de escala; e, com isso, promover atenção a esse problema nas lutas contemporâneas. Na primeira seção, Uhel localiza as discussões acadêmicas em torno da escala, como uma ferramenta metodológica útil para compreender a complexidade das sociedades capitalistas; na segunda seção, o autor avança a exposição em torno do contexto da dimensão escalar do imperialismo capitalista; por fim, o autor enfoca o papel da atividade política em escala nacional na tensa relação entre as imposições do capital e a luta social.Mathieu Uhel\u27s suggestive title, “Thinking about scales to think about struggles”, he interweaves the theoretical-critical construction of concept scale, generated by radical Anglo-Saxon geography in the late 20th century, with it´s practical utility to social struggles. The article serves two purposes: on the one hand, Uhel locates academic discussion around scale; and, with this, he promotes attention to this problem in contemporary struggles. In the first section, Uhel locates academic discussions around scale, as a useful methodological tool to understand the complexity of capitalist societies; in the second section, the author advances the argument around the context of the scalar dimension of capitalist imperialism; finally, the author focuses on the role of political activity on a national scale in the tense relationship between the impositions of capital and the social movement
Metal-bis(dithiolene) complexes for cancer theranostics : photothermal therapy, photocontrolled drug delivery and photoacoustic properties
No full textCe travail s’intéresse à l’exploitation des propriétés photothermiques dans le proche infrarouge (NIR) des complexes de métal-bis(dithiolène) neutres pour des applications biomédicales. L’encapsulation de ces complexes dans des nanoparticules polymère ou dans des liposomes thermosensibles a permis de mettre à profit leur effet photothermique remarquable pour la théranostique du cancer. En effet, ces travaux de thèse démontrent que les vecteurs photoactivables formulés présentent un fort potentiel pour une utilisation comme agents photosensibilisateurs pour la thérapie photothermique. De plus, l’irradiation laser du complexe encapsulé permet de moduler la perméabilité du vecteur et ainsi de libérer un agent co-encapsulé avec un bon contrôle spatio-temporel. Ces travaux démontrent également que l’effet photothermique des complexes de métalbis(dithiolène) peut être mis à profit dans la conception d’agent de contraste pour l’imagerie photoacoustique. Finalement, ce travail s’est concentré sur l’étude et la comparaison des propriétés photothermiques de sept agents moléculaires. Les résultats de cette étude font clairement apparaître que les performances remarquables des complexes bis(dithiolènes), couplées à leurs excellente stabilité photochimique et thermique, en font des candidats très prometteurs pour la théranostique du cancer.This work focuses on the exploitation of the photothermal properties in the near-infrared (NIR) region of neutral metal-bis(dithiolene) complexes for biomedical applications. Encapsulation of these complexes in polymer nanoparticles or in thermosensitive liposomes allowed to use theirremarkable photothermal effect for cancer theranostics. This work demonstrates that theformulated photoactive nanovectors have great potential to be used as photosensitizers forphotothermal therapy. Moreover, laser irradiation of the encapsulated complex allowed to finely tune the permeability of the cargo, thus leading to the release of the co-encapsulated agent with a high spatiotemporal control. This work also demonstrates that the photothermal effect of metal-bis(dithiolene) complexes can be used for designing the design of contrast agents for photoacoustic imaging. Finally, this work focused on the study and the comparison of the phtotothermal properties of seven molecular agents. The results of this study clearly show that the remarkables properties of metal-bis(dithiolene) complexes, coupled with their excellent photochemical and thermal stability, make them very promising candidates for cancer theranostics
Mathieu Ichou, Les Enfants d’immigrés à l’école
No full textIt is common to hear in the fields of educational and immigration sociology that on average, the children of immigrants do not perform as well in school as children of native-born parents. Mathieu Ichou offers an innovative sociological analysis on a topic that is heavily exploited by political and media discourse, and subject to much scientific controversy. The author takes distance from the homogenized vision of a “second generation” of students who have totally failed academically, and rep..
L'impatto dell'attività tintoria sull'ambiente. Firenze alla fine del Medioevo
No full textThe author aims to examine and categorize the range of dyeings materials used in the Florentine wool and silk textile industries in the late Middle Ages, focusing mainly on those produced within the regional space in order to evaluate the impact of the Florentine dyeing activity on the natural environment and the productive landscape of the Tuscan countryside. In particular, the author establishes a line of demarcation between cultivated and uncultivated resources in order to verify which constitutes an indication of the level of industrial development of medieval textile production. This further focuses on how the transition from the exploitation of wild resources to the exploitation of cultivated resources could reflect a greater degree of economic integration between the countryside and the city and contribute to the formation of a regional economic space
Mathieu de Fossey: su visión del mundo indígena mexicano
No full textThroughout these pages the author shows how Mathieu de Fossey perceived that it was not easy to make indigenous communities fit within the mould of the nation-state which, being based on the liberal and egualitarian ideology, was against the recognition of special regimes, such as those that created a peculiar status for the native population of the American territory during the period of Spanish colonial domination
Laser triggered phase transition in photothermal liquid crystals
No full textInternational audienceReversible high temperature phase transitions were easily induced under laser irradiation in pure thermotropic liquid crystals built around photothermal nickel-bis(dithiolene) cores. The strong photothermal activity of nickel-bis(dithiolene) liquid crystalline thin films allows reaching a temperature as high as 250 °C directly from room temperature in a few seconds with high spatial control
Mathieu de Fossey: su visión del mundo indígena mexicano
No full textÀ travers ces pages, l’auteur montre comment Mathieu de Fossey avait perçu la difficulté d’insérer le monde des communautés indigènes dans le moule d’un État national qui, accroché à une idéologie libérale égalitaire, refusait d’établir des régimes spéciaux comparables à ceux qui, durant la domination espagnole, avaient reconnu un statut particulier aux populations natives du continent américain.A través de estas páginas se muestra cómo Mathieu de Fossey percibió el difícil acoplamiento del mundo de las comunidades indígenas en el molde de un Estado nacional que, por estar sustentado en la ideología liberal igualitaria, era contrario al reconocimiento de regímenes especiales como los que, durante la dominación española, habían establecido un status peculiar para los aborígenes del territorio americano.Throughout these pages the author shows how Mathieu de Fossey perceived that it was not easy to make indigenous communities fit within the mould of the nation-state which, being based on the liberal and egualitarian ideology, was against the recognition of special regimes, such as those that created a peculiar status for the native population of the American territory during the period of Spanish colonial domination
Investigation of documents persistency on the Web
No full text@inproceedings{CI-Lancieri-2004-2, author = {Lancieri, Luigi and Lecouvey, Mathieu and Glasse, Veronique}, title = {Investigation of documents persistency on the Web}, booktitle = {International conference E-Society 2004 (ES2004), IADIS}, year = {2004}, address = {Spain} }International audienc
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