892 resultados para fisica teórica


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Considerando al cuerpo como construcción social, tomamos la idea de repugnancia para pensar en qué medida la percepción varía, en sentido cultural y de clase, en el caso de la basura, la contaminación y los cuerpos que allí se construyen. A partir de analizar la experiencia de personas que viven sobre territorios que fueran basurales, el concepto de repugnancia puede ser una vía para comenzar a desentrañar el complejo proceso de construcción de la corporalidad, viendo cómo se constituyen los límites de lo propio y lo otro, de lo permitido y lo pensable frente a aquello que queda por fuera - necesario para definir "el adentro". Este otro puede ser rastreado en los cuerpos, en los cuerpos otros, que habitan territorios que desde otras miradas son inhabitables. Así, la repugnancia está ligada a lo no pensable, y a la vez no percibido en tanto no perceptible. Por un lado, repugnancia operando en ellos, haciendo no visible a la basura en su territorio. Por otro, esos cuerpos otros ligados a lo desechable, lo relativo a la basura, la habitan redefiniéndola (evidenciando la durabilidad de lo supuestamente efímero), en el marco de las relaciones de poder que dominan esta problemática en la sociedad de consumo

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The Cervarola Sandstones Formation (CSF), Aquitanian-Burdigalian in age, was deposited in an elongate, NW-stretched foredeep basin formed in front of the growing Northern Apennines orogenic wedge. The stratigraphic succession of the CSF, in the same way of other Apennine foredeep deposits, records the progressive closure of the basin due to the propagation of thrust fronts toward north-east, i.e. toward the outer and shallower foreland ramp. This process produce a complex foredeep characterized by synsedimentary structural highs and depocenters that can strongly influence the lateral and vertical turbidite facies distribution. Of consequence the main aim of this work is to describe and discuss this influence on the basis of a new high-resolution stratigraphic framework performed by measuring ten stratigraphic logs, for a total thickness of about 2000m, between the Secchia and Scoltenna Valleys (30km apart). In particular, the relationship between the turbidite sedimentation and the ongoing tectonic activity during the foredeep evolution has been describe through various stratigraphic cross sections oriented parallel and perpendicular to the main tectonic structures. On the basis of the high resolution physical stratigraphy of the studied succession, we propose a facies tract and an evolutionary model for the Cervarola Sandstones in the studied area. Thanks to these results and the analogies with others foredeep deposits of the northern Apennines, such as the Marnoso-arenacea Formation, the Cervarola basin has been interpreted as a highly confined foredeep controlled by an intense synsedimentary tectonic activity. The most important evidences supporting this hypothesis are: 1) the upward increase, in the studied stratigraphic succession (about 1000m thick), of sandstone/mudstone ratio, grain sizes and Ophiomorpha-type trace fossils testifying the high degree of flow deceleration related to the progressive closure and uplift of the foredeep. 2) the occurrence in the upper part of the stratigraphic succession of coarse-grained massive sandstones overlain by tractive structures such as megaripples and traction carpets passing downcurrent into fine-grained laminated contained-reflected beds. This facies tract is interpreted as related to deceleration and decoupling of bipartite flows with the deposition of the basal dense flows and bypass of the upper turbulent flows. 3) the widespread occurrence of contained reflected beds related to morphological obstacles created by tectonic structures parallel and perpendicular to the basin axis (see for example the Pievepelago line). 4) occurrence of intra-formational slumps, constituted by highly deformed portion of fine-grained succession, indicating a syn-sedimentary tectonic activity of the tectonic structures able to destabilize the margins of the basin. These types of deposits increase towards the upper part of the stratigraphic succession (see points 1 and 2) 5) the impressive lateral facies changes between intrabasinal topographic highs characterized by fine-grained and thin sandstone beds and marlstones and depocenters characterized by thick to very thick coarse-grained massive sandstones. 6) the common occurrence of amalgamation surfaces, flow impact structures and mud-draped scours related to sudden deceleration of the turbidite flows induced by the structurally-controlled confinement and morphological irregularities. In conclusion, the CSF has many analogies with the facies associations occurring in other tectonically-controlled foredeeps such as those of Marnoso-arenacea Formation (northern Italy) and Annot Sandstones (southern France) showing how thrust fronts and transversal structures moving towards the foreland, were able to produce a segmented foredeep that can strongly influence the turbidity current deposition.

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The discovery that a spin-polarized current is capable of exerting a torque in a ferromagnetic material, through spin transfer, might provide the development of new technological devices that store information via the direction of magnetization. The reduction of current density to revert the magnetization is a primary issue to potential applications on non volatile random access memories (MRAM). We report a theorical study of the dipolar and shape effects on the critical current density for reversal of magnetization, via spin transfer torque (STT), on ferromagnetic nanoelements. The nanostructured system consists on a reference layer, in which the current will be spin-polarized, and a free layer of magnetization reversal. We observed considerable changes on the critical current density as a function of the element’s reversion layer thickness (t = 1.0 nm, 1.5 nm, 2.0 nm e 2.5 nm) and geometry (circular and elliptical), the material kind of the system free layer (Iron and Permalloy) and according to the orientation of the magnetization and the spin polarization with the major axis. We show that the critical current density may be reduced about 50% by reducing the Fe free layer thickness and around 75% when we change the saturation magnetization of circular nanoelements with 2.5 nm of thickness. We still observed a reduction as much as 90% on the current density of reversion for thin nanoelements magnetized along the minor axis direction, using in-plane spin polarization parallel to the magnetization.

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School teachers in the discipline of Physical Education, we find ourselves constantly in question of methodological and epistemological issues of practice. This research aims to identify human body understanding, movement and theoretical learning proposed by examining the work of Jean Le Boulch and his approach to Physical Education. We seek to indicate epistemological elements about Physical Education theory and practice, believing that this approach and dialog comes to contribute with this field of knowledge. Boulch, a French teacher of Physical Education, Medicine and Psychology, had an important influence in Brazilian Physical Education during the 1970s and 1980s. His main contribution was teaching courses and knowledge about psychomotricity. Boulch’s studies helped to build knowledge of human movement; considering his importance in people’s development and a critic to a mechanistic view of body and movement. Our reflections will be based on the concepts brought from psychokinetics presented in the bibliographic references of Le Boulch in Brazil, and other references developed by him in this country including conferences, lectures and interviews. This reflection includes the debaters of his work. We chose a theoretical approach referring to the Phenomenology of philosopher Maurice Merleau-Ponty (1999) as a methodological reference considering the influence of his thought in Le Boulch studies. This thesis examines the learning and practice of teaching the Physical Education field of knowledge. We conclude that the body being an entity that exists for itself in the world and that contact with the world starts from human movement. Ultimately, new trains of thought for the teaching of physical education can be set from the reflection of phenomenological concepts brought by Le Boulch in his theory.

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Research on Legal Deontology dedicated to theoretical and applied ethics on judicial conduct grounded in legal principles and rules set out in the Constitution of the Federative Republic of Brazil and the Organic Law of the National Judiciary, also contemplating propositional instruments covered by the constitutional system, which conveys behavioural paradigms inserted in the Bangalore Principles of Judicial Conduct, in the Universal Statute of the Judge and in the Latin-American Code of Judicial Ethics, as well as highlight the influence of those instruments in the Brazilian Ethical Code of the Magistrates and in the official complementary training of judges in charge of Judiciary Schools. The study provides the theoretical influxes of moral norm, passing by behavioural social norm to consolidate the ideal standards of judicial conduct into legal standards and related instruments. The Legal Deontology directed to the ethical judicial conduct is confronted with the stereotype that society expressed in relation to the judge's person, who is the political agent that interprets the law for making decisions which directly influences the realization of access to justice, that is constitutionally guaranteed to all. Core values inserted in the constitutional system intended to discipline the judicial conduct are presented and analysed under a critical view, since they are enclosed in prescriptive language that conveys behavioural aspects open to interpretation and which compliance is revealed as a proposition focused on promoting a better solution of interest’s conflicts under the responsibility of those who constitute the distinctive corporation of the Judiciary. The theme’s contextualization also focuses on applied ethics, based on the approach of normative and propositional instruments of deontological content, still focusing on the study of real cases examined by the Brazilian National Council of Justice, as part of its correctional goals.

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This study had the goal of make a dialogue between queer theory and the thoughts of the French philosopher Maurice Merleau-Ponty in the categories of body and sexuality. From this dialogue, other goals were designed, namely: identify possible recurrences of the experience of bodies and queer sexualities, designed under Merleau-Ponty’s perspective, to the knowledge of Physical Education and reflect on this domain of knowledge using the notions of queer epistemology and esthesia. The study had as methodology the phenomenological attitude proposed by Merleau-Ponty and use the reduction as technic of research. Trying linking these thoughts we used the cinema of the Spanish director Pedro Almodóvar as perceptive strategy, an exercise of look as possibility of reading the world and new ways of perceiving the human being. We appreciate three films, namely: All About My Mother (1999), The Skin I Live In (2011) and Bad Education (2004), which put us in touch with bodies and queer sexualities, with the body of esthesia, of the ecstasy, sensations and lived experiences, un type of art whose contours are not fixed or determinable, postulate by Merleau-Ponty. The philosopher, provide a rich conceptual view of the body and their sexual experience, extends and opens horizons of thought and reflection about queer experience, one experience indeterminate and contingent as a singular way of inhabiting the world. Those horizons opened by the philosopher and added to the queer perspective contribute to put in question the modes of knowledge production and the knowledge about body and sexuality in Physical Education. Finally, we point that this theoretical conversation give us clues to reflect about the reverberations of a queer epistemology for Physical Education usiging one type of knowledge guided by esthesia and sensitivity as marks of another scientific rationality.

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Questo elaborato presenta una descrizione del fenomeno dell’accrescimento di materia su oggetti compatti, esponendo i principali modelli fisici a riguardo. Dopo un’introduzione, in cui viene mostrato come l’accrescimento rappresenti la più importante fonte di energia in astrofisica, si discute nel capitolo 1 il più semplice modello di accresci- mento, dovuto ad Hermann Bondi (1952). Tale modello, proprio per la sua semplicità, risulta molto importante, nonostante trascuri importanti aspetti fisici. Nel capitolo 2 si studia la fisica dei dischi di accrescimento, analizzando sia il caso generale che alcuni casi particolari, come quello stazionario o a viscosità costante. L’elaborato si conclude con una breve analisi dell’emissione termica da parte del disco di accrescimento.

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This dissertation analyzed the existing work on travestility and transsexuality whose problematic research focused on issues related to health and / or health services. For this purpose, a Literature Review Systematized Descriptive in virtual databases was performed: Bank of Higher Education Personnel Improvement Coordination Thesis (CAPES), Brazilian Digital Library of Theses and Dissertations (BDTD), Scielo and PubMed, between the years 1997 and 2014 in Brazil. We used the search terms "transsexual," "transvestite" and "transgender", each associated with the search term "health", in Portuguese and English. Complementing this search, we used the Documentary Analysis methodology to assess pamphlets productions, institutional documents and non-governmental organizations (NGOs), which were incorporated into the discussion. 295 papers were identified, among theses, dissertations and scientific articles. Of these, 223 were excluded and 72 selected for analysis. Thus, it obtained five theses and dissertations 21 on the topic of travestility and 7 theses and dissertations 9 that deal with transsexuality. Among the selected papers, 16 deal with transsexuality and health, 5 address the issue of travestility and health and work, 9 refer to the term "transgender" and "health". Even though it is an emerging field of research, there is an apparent deviation of the speech, previously anchored in questions whose topics are related to confrontation, infection or illness by HIV / AIDS (level of specialized care) for discussions on the health care for transsexuals in the process (level of specialized care). Still, few papers have specific trans attention in primary care associated with a comprehensive health care, with the empowerment of individuals, respecting the power of life, which are configured as important issues for the Public Policy on Health today.

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El hecho de desconocer o restarle interés a los diferentes deportes alternativos o juegos motores no tradicionales, puede ser razón necesaria para que muchos docentes del campo de la Educación Física no contemplen en sus clases este tipo de prácticas corporales. Sin embargo, los juegos y deportes no convencionales, posibilitan nuevas experiencias motrices, lógicas estructurales diferentes, invitan a la participación, cooperación e inclusión. El objetivo que pretende este artículo, es presentar al Prellball como juego deportivo (no convencional), brindando la posibilidad de analizar los componentes de su lógica interna a la luz de la praxiología motriz. De este modo, se desarrollarán elementos significativos que pueden ser tenidos en cuenta para la intervención docente

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El Análisis de Correspondencias Múltiples (ACM), recurso metodológico utilizado por Bourdieu y su equipo en un nivel avanzado de síntesis teórico-empírica, constituye una herramienta fundamental para la construcción analítica de espacios relacionales. Permite posicionar relacionalmente unidades de análisis en función de un conjunto determinado de variables y plasmar la multiplicidad resultante tanto gráfica como analíticamente. Comenzando por una reflexión general sobre las potencialidades de la herramienta, este artículo analiza la configuración del espacio universitario privado en Argentina (1955-1983) a partir del ACM, que permitió determinar las relaciones de homología y principios de diferenciación existentes entre las instituciones que lo componen.