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Mecanismos enunciativos no ensino de língua : entre o erro e a criatividade
(Universidade Federal de São Carlos, 2009-09-30) Bertolo, Larissa de Oliveira; Onofre, Marilia Blundi; https://lattes.cnpq.br/4908382415301882; https://lattes.cnpq.br/6358351541849570
This work falls within the scope of the enunciative-linguistic research. We want to build a relationship between linguistic analysis and practice of teaching and learning of mother language, speeded us on the theoretical and methodological perspectives of the Theory of Enunciative Operations developed by Antoine Culioli. The research question refers to the shifts of the enunciative marks of person-space-time in the textual production of the student in process of teaching and learning. Such enunciative shifts, as we have noted, can cause the student s textual compromise. Considering that the context in question is the teaching and learning language, we believe that such occurrences involve the cognitive-linguistic development of the student, a fact which interests us as a background for the linguistic issues focused here. The corpus of analysis is composed of assignments and fables texts. In the latter, the enunciative shifts do not compromise the production of meanings of the text, contrary to what occurs, in general, in school texts. To achieve the specific goals, we seek to understand the movement between the marks of person-space-time in the utterances of school texts and of fables, concentrating our analysis on the lexical-grammatical relations which involve the enunciative shifts. These analysis have led us, as a result, to recognize the shifts of the enunciative categories responsible for compromising the student's text, as well as to identify them as linguistic-statements resources used in the production of meaning in fables texts. In response to overall objectives, we believe that the approach of these issues in the teaching/learning of language can indicate a path so that the pedagogical practices accomplish, geared towards the development of students discursive competence, a task that is objectified by the school.
A sonoridade híbrida de Hermeto Pascoal e a indústria cultural
(Universidade Federal de São Carlos, 2009-09-30) Silva, Camila Perez da; Pellegrini, Tânia; https://lattes.cnpq.br/0280434883580627; https://lattes.cnpq.br/0169459180378881
This research addresses the sound hybrid developed by Brazilian musician Hermeto Pascoal, in order to understand the influence of technical rationality scattered by the culture industry, as well as the possibilities of resistance against the logic of standardization of the system. The development of a style of composition and the adoption of specific strategies for the dissemination of Hermeto s creations helps to understand the dialectic between the autonomy of the aesthetic subject and the homogenization of the culture industry, and how the very rich tradition and craft of Brazilian music, especially popular instrumental in some respects, it isn t offered as a docile field to economic domination of this system.
Estudo experimental e numérico da força de levitação magnética em supercondutores de alta temperatura crítica
(Universidade Federal de São Carlos, 2009-09-30) Sanchez, Elmer Saavedra; Moreira, Fernando Manuel Araújo; https://lattes.cnpq.br/1809254923092721; https://lattes.cnpq.br/4927164334841312
In this research work we propose, in general, to address the issue of magnetic levitation force between a superconducting material and a permanent magnet. This is a very current and relevant mainly from a technological standpoint, as it allows, among others, the design of machines such as motors, generators and trains based on the principle of levitation. Thus, the research proposed here has been very inclusive, treating the subject of levitation not only from the experimental point of view, but also theoretical. In the experimental approach we have built, assembled and calibrated an experimental station that measures the levitation force, vertically and horizontally, of a permanent magnet on a sample of high critical temperature superconducting materials of the type YBa2Cu3O7-d. Within this scope, we also have developed the ability to prepare the samples using various types of chemical methods and routes that resulted in samples with different textures and properties, where the measurement of the levitation force also pointed out differences between them. The samples had their quality assessed by (a) magnetic characterization (through measures of AC magnetic susceptibility) and (b) structural characterization (through measures of x-rays diffraction and measurements of scanning electron microscopy). In the theoretical approach of this issue, we developed a program allowing simulating the magnetic levitation force by obtaining the relations of force between the permanent magnet and the superconducting material. In this numerical study we have considered the analytical expressions of classical electromagnetism to write the integral equation of the derivative of the current density inside the superconductor, as a function of the geometry and the settings of the applied field. Next, we used the Method of Moments to write the integral equation in its analytical formulation matrix, in which the current density at each point in time is obtained by a simple rule of integration (Euler method). Thus, were also calculated curves for superconducting magnets in the shape of a finite cylinder in which it was measured the levitation force between a permanent magnet and a superconductor, both in the finite and cylindrical geometry. Finally, we compare both results, theoretical and experimental, for sets of samples with different geometries and obtained following different preparation methods.