148,386 research outputs found
A sociologia antropocêntrica de Alberto Guerreiro Ramos
No full textTese (doutorado) - Universidade Federal de Santa Catarina, Centro de Filosofia e Ciências Humanas. Programa de Pós-Graduação em Sociologia Política.No elenco das diferentes modalidades de estudos que sobre o pensamento sociológico de Alberto Guerreiro Ramos já foram realizadas, esta tese se coloca como uma possibilidade de interpretação que propicie aclarar, não as pontualidades temáticas ou as respostas aos problemas contingentes a que este sociólogo se propôs pensar, mas a coerência de suas crenças no tempo. Segundo pensamos, esta interpretação pautada na coerência das crenças guerreirianas pode trazer elucidações fundamentais acerca do alcance, do sentido e da finalidade da construção teórica à qual ele se dedicou, dos principais conceitos, modelos e proposituras por ele construídas, bem como permite justificar a mobilização e apropriação de conceitos e correntes teóricas por ele procedidas. Neste sentido, a tese que aqui se apresenta defende que há, no conjunto da obra de Guerreiro Ramos, uma forte crença da premência de um novo humanismo e, em termos correlatos, de um novo tipo humano, a partir dos quais seria possível teorizar sobre a vida humana individual e associada. Uma expressão marcante dessa crença do autor está na preocupação e no pressuposto por ele assumidos de que a sociedade deveria ser vertida ao homem, e não o inverso. Esta crença tem seu correspondente na afirmativa de Protágoras, e com a qual Aristóteles estava de pleno acordo: anthrôpos metro panthô chrématon (o homem é a medida de todas as coisas humanas). Munido deste humanismo radical, nosso sociólogo passou em revista os pressupostos sobre o homem que legitimavam a ciência social de sua época, denunciou os principais obstáculos sociais impeditivos de um processo de humanização e articulou a sua proposta de uma nova ciência do social. É neste sentido que afirmamos ser antropocêntrica a sociologia de Guerreiro Ramos. Esta pesquisa, assim, atenta para uma questão que até agora é inédita, tendo-se em conta todos os trabalhos que trataram da obra ou dos estudos de Guerreiro Ramos. Several studies about Ramos#s sociological thought have been written in Brazil. The purpose of this dissertation is to be an interpretation to clarify some elements that support the Ramos#s coherence of beliefs in time. This coherence exists in all Ramos#s work, since his juvenile papers until his last book. We believe that our interpretation can be help in the understanding of the reach, of the meaning, and of the final aim of his theoretical work or of his concepts, models, and sociological proposals. Also we believe that our interpretation can help in the understanding of his displacement of concepts and filiations with currents of thought. In this dissertation we demonstrated that there is in the Ramos#s works a strong belief in the urgency of a new humanism, and a new human type, starting from which would be possible to theorize about the individual and associated human life, in others words, a humanism which the man was the measure of everything. An example of this is his concern and presupposition that the society should be structured for the man and not the opposite. With this radical humanist point of view, Ramos revised the man presupposition of the social science of his time, denounced the main social obstacles to the humanization process, and proposed a new science of social. In this way, we affirm that the Ramos#s sociological thought is anthrophocentric
Angústia, de Graciliano Ramos e a deformação expressionista
No full textDissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Comunicação e Expressão. Programa de Pós-Graduação em Literatura.Este trabalho procura mostrar que a visão distorcida da realidade, própria da arte moderna, não se restringe às artes plásticas. Essa visão, representante de um outro modo de olhar e sobretudo ver o real, encontrou também na obra literária possibilidades de se externar. Angústia, de Graciliano Ramos, inscreve-se na Literatura Brasileira como um romance rico em imagens resultantes da visão deturpada de um narrador em conflito consigo mesmo. A narrativa de Luís da Silva é analisada a partir do poder de visualização do narrador - em seus aspectos subjetivos e sua expressividade - em seus pontos de contato com a pintura expressionista, de modo especial com O Grito, de Edvard Munch
Electrohydrodynamics and dielectrophoresis in microsystems: scaling laws
No full textThe movement and behaviour of particles suspended in aqueous solutions subjected to non-uniform ac electric fields is examined. The ac electric fields induce movement of polarizable particles, a phenomenon known as dielectrophoresis. The high strength electric fields that are often used in separation systems can give rise to fluid motion, which in turn results in a viscous drag on the particle. The electric field generates heat, leading to volume forces in the liquid. Gradients in conductivity and permittivity give rise to electrothermal forces and gradients in mass density to buoyancy. In addition, non-uniform ac electric fields produce forces on the induced charges in the diffuse double layer on the electrodes. This causes a steady fluid motion termed ac electro-osmosis. The effects of Brownian motion are also discussed in this context. The orders of magnitude of the various forces experienced by a particle in a model microelectrode system are estimated. The results are discussed in relation to experiments and the relative influence of each type of force is described
Afrobethylus Ramos & Azevedo, gen. nov.
No full text<i>Afrobethylus</i> Ramos & Azevedo, gen. nov. <p>(Figs 1 A–G)</p> <p> <b>Diagnosis.</b> Antenna with 10 flagellomeres. Notaulus absent. Metapectal-propodeal complex without median longitudinal carina; metapostnotal-propodeal suture inconspicuous; posterior transverse carina absent. Fu Vshaped; 1vf large; 2vf large; vr2 broadly enlarged, bifid; pp2vf present, curved.</p> <p> <b>Description.</b> <i>Female. Head.</i> Mandible with four sharpened apical teeth. Antenna with 10 flagellomeres. <i>Mesosoma.</i> Notaulus absent. Mesoscutellum with pair of elongate and inclined foveae. Metapectal-propodeal complex coriaceous-punctate; without median longitudinal carina; metapostnotal-propodeal suture inconspicuous; posterior transverse carina absent. Mesopleuron coriaceous-punctate; mesopleural pit shallow. Prosternum large, excavated medially. <i>Forewing.</i> Costal cell conspicuous only apically; second radial cell closed, long, triangular; Rs vein shorter than M vein; stigma well developed. <i>Legs.</i> Profemur expanded. Tarsal claws bifid, strongly curved. <i>Genitalia.</i> Fu V-shaped; 1vf large; vr1 large; 2vf large; vr2 broadly enlarged, bifid; d1vf thorn shaped; pp2vf present, curved; distal region of the sting tapering abruptly; 3vv wide, and long.</p> <p>Male. unknown.</p> <p> <b>Type-species.</b> <i>Afrobethylus zulu</i> Ramos & Azevedo, <b>sp. nov.</b></p> <p> <b>Species included.</b> <i>Afrobethylus antankarana</i> Ramos & Azevedo, <b>sp. nov.,</b> <i>A. antemoro</i> Ramos & Azevedo, <b>sp. nov.,</b> <i>A. bapedi</i> Ramos & Azevedo, <b>sp. nov.,</b> <i>A. swazi</i> Ramos & Azevedo, <b>sp. nov.,</b> <i>A. vezo</i> Ramos & Azevedo, <b>sp. nov.,</b> <i>A. zulu</i> Ramos & Azevedo, <b>sp. nov.</b></p> <p> <b>Remarks.</b> This genus is easily recognizable among the other genera of Bethylinae by having the unique combination of antenna with ten flagellomeres and the forewing with second radial cell closed.</p> <p> <b>Etymology.</b> The name <i>Afrobethylus</i> is an allusion to the names “Africa”, continent from the specimen was collected, and the name “ <i>Bethylus</i> ” the type genus of Bethylinae.</p>Published as part of <i>Ramos, Magno S. & Azevedo, Celso O., 2016, Afrobethylus Ramos & Azevedo, gen. nov., a new remarkable Afrotropical genus of Bethylinae (Hymenoptera: Bethylidae), pp. 495-510 in Zootaxa 4097 (4)</i> on page 496, DOI: 10.11646/zootaxa.4097.4.3, <a href="http://zenodo.org/record/257030">http://zenodo.org/record/257030</a>
Parâmetros morfológicos e fisiológicos associados com a seca de ramos do cafeeiro.
No full textA seca de ramos do cafeeiro é um dos principais problemas de diversas cultivares de café. A maioria das evidências indica que a causa primária deste distúrbio é o esgotamento de carboidratos da planta em decorrência de superprodução de frutos. Acredita-se que plantas mais sujeitas ao depauperamento possuam características que as predispõem a este distúrbio, como por exemplo, pequena área foliar e sistema radicular deficiente. Este trabalho foi elaborado como o objetivo de quantificar a área foliar, as relações folha/fruto e a partição de matéria das raízes, caule, ramos, folhas e frutos de genótipos de café com diferentes graus de suscetibilidade à seca de ramos, a fim de determinar parâmetros morfológicos e fisiológicos relacionados à seca de ramos e ao depauperamento precoce. Foram realizados dois ensaios comparando as progênies Sabiá Precoce 417, Sabiá Médio 708 e Catuacaí-açu, as quais são bastante suscetíveis à seca de ramos, com as cultivares Catuaí Amarelo IAC 62 e Catucaí Vermelho 19/8 (pouco suscetíveis à seca de ramos). Verificou-se que a cultivar Catuaí apresentou uma relação folha/fruto cerca de 20% maior que as relações das progênies Sabiá durante todo o período de frutificação, embora a produção de frutos, o crescimento vegetativo e a partição de matéria seca tivessem sido semelhantes. Concluiu-se que a pequena razão folha/fruto é uma característica intrínseca das progênies Sabiá
Application of a classification algorithm to the early-stage damage detection of a masonry arch
No full textThe early-stage identification of structural damage still represents a relevant challenge in civil engineering. Localized damages if not readily detected can lead to disruption or even collapse, involving hazard to people and economical losses. Although the final goal of the identification is to localize and quantify the damage, a reliable discrimination between normal and abnormal states of the structure in the very early stage of the damage onset is not an easy task. In the field of Structural Health Monitoring (SHM) great attention has been paid to the development of damage detection methods based on continuous and automatic registration of the system response to unknown ambient inputs. The numerical algorithms exploited must be: (1) easy to implement and computationally inexpensive, eventually being embedded in the sensors; (2) as much independent on human decision as possible; (3) robust to the many sources of uncertainties affecting the monitoring; (4) able to detect small damage extents in order to provide an early warning; (5) suitable for the application in the case of few and sparse measurements collected only in the normal condition. The performance of a novel version of Negative Selection Algorithm, recently developed by the authors, is here analyzed with attention to these issues. The algorithm is tested against data collected on a segmental masonry arch built in the laboratory of the University of Minho and subject to progressive lateral displacement of one support
G-quartet-dependent recognition between the FMRP RGG box and RNA
No full textFragile-X syndrome, the most common monogenic form of mental retardation, is caused by down-regulation of the expression of Fragile X Mental Retardation Protein (FMRP). FMRP is a multifunctional, multidomain RNA-binding protein that acts as a translational repressor in neuronal cells. Interaction between FMRP and mRNA targets involves an RGG box, a protein motif commonly thought to mediate unspecific interactions with nucleic acids. Instead, FMRP RGG box has been shown to recognize RNA G-quartet structures specifically and to be necessary in neurons for RNP particle formation and dendritic mRNA localization. In the present study, we have characterized structurally three representative RNA targets of FMRP in their unbound form and in complex with the RGG box. We observe a large heterogeneity in the conformation of the RNA targets and in their RGG binding mode, which could be the basis of recognition specificity. We also found that G-quartet formation occurs not only intramolecularly but can also be mediated by RNA dimerization. These findings suggest a potential role of RNA:RNA interactions in protein:RNA complexes and in RNP particle assembly
Discurso sobre la belleza de las mugeres
No full textSign.: *\p6\s, A\p2-8\s, B-G\p8\s, H\p2\sPort. con adorno ti
The dielectrophoretic and travelling wave forces for interdigitated electrode arrays: analytical solution using Fourier series
No full textIn alternating current electrokinetics, electric fields are used to generate forces on particles. Techniques have been applied for the manipulation of particles and the measurement of their dielectric properties. The fields are typically generated by microelectrode structures fabricated on planar surfaces. One particular design, using interdigitated bar electrodes, is used both in dielectrophoretic field flow fractionation and travelling wave dielectrophoresis. This paper presents a Fourier series analysis of the dielectrophoretic force on a particle generated by this type of electrode array, for both dielectrophoresis and travelling wave dielectrophoresis. Simple expressions are derived for the force at a distance of the order of the electrode spacing from the electrodes. A full analytical expression is given for the dielectrophoretic force in two dimensions. Comparisons are made with previously published experimental observations
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