870 resultados para auto-regressive


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Ludwig Streit

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A avaliação das escolas é uma questão que tem levantado muitos debates, não só a nível político, mas também a nível dos actores educativos. O reforço da autonomia, bem como a pressão social que hoje em dia se fazem sentir sobre as escolas, exigem que estas assumam uma maior responsabilidade perante a comunidade em geral. É neste contexto que a auto-avaliação ocupa um lugar primordial, já que se constitui como um meio para reflectir e tomar decisões no sentido de melhorar a qualidade escolar. Partindo desta problemática, este trabalho de pesquisa tem como objecto de estudo, a análise e reflexão das práticas de auto-avaliação. Pretendeu-se: (i) averiguar quais as percepções sobre a temática “auto-avaliação das escolas”, (ii) obter uma panorâmica sobre o estado actual das dinâmicas de auto-avaliação, (iii) determinar se estas têm implicações no processo educativo e (iv) contribuir para que as escolas tomem consciência do trabalho desenvolvido e aperfeiçoem as suas práticas. Para tal, é apresentado um quadro de referência, onde se procura dar conta dos pressupostos teóricos inerentes à auto-avaliação organizacional. Após a definição do quadro teórico, partiu-se para o estudo empírico, procurando situá-lo através da definição do problema que lhe está subjacente,determinando os aspectos que o nortearam e os fundamentos metodológicos. A análise dos resultados obtidos enfatizou a efectiva importância que é atribuída aos processos auto-avaliativos na qualidade do ensino e a necessidade de uma maior formação nesta área.

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A escola é um contexto fundamental para o desenvolvimento das crianças e adolescentes, sendo um local privilegiado para os processos de socialização e de construção de identidade colaborando para a organização do seu auto-conceito. Este contexto tanto pode propiciar experiências que favorecem sentimentos de confiança e competência, como pode actuar no sentido oposto, diminuindo o autoconceito daqueles que têm dificuldades em obter bons resultados e fazer amizades. Os percursos escolares são construídos através da experiência de vida de cada aluno. No entanto, a transição escolar é um factor com que todos os alunos têm de lidar, implicando mudanças nos papéis que desempenham, nas suas rotinas, relações e na forma como se percepcionam e percepcionam o mundo, podendo ter, por isso, repercussões nas atitudes que os alunos desenvolvem face à escola e sobre si mesmos. Deste modo é importante que, os alunos, ao transitarem de escola levem consigo uma percepção positiva sobre si e sobre as suas vivências escolares. Nesse sentido, este estudo pretendeu, através de uma abordagem descritivocorrelacional de caracter quantitativo, analisar a relação entre auto-conceito e as atitudes face à escola de modo a perceber melhor o efeito destes factores em alunos que se preparavam para transitar de ciclo de ensino. Para o efeito, foi recolhida uma amostra de 157 alunos, do 4º, 6º e 9º ano, de duas escolas da Região Autónoma da Madeira, a frequentar o ano lectivo 2011/2012 e utilizada a Piers-Harris Children’s Self-Concept Scale (PHCSCS-2) (Veiga, 2006) e o Questionário de Atitudes Face à Escola (QAFE) (Candeias & Rebelo, 2011). No que respeita aos resultados obtido, estes demonstraram que existe uma relação significativa, positiva, entre o auto-conceito e as atitudes nos três anos de escolaridade, assim como, uma diminuição nas atitudes face à aprendizagem do 6º para o 9º ano. Observou-se, também, que os rapazes apresentam índices mais elevados nas dimensões do auto-conceito “popularidade” e “ansiedade”, do que as raparigas.

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The current study presents the characteristics of self-efficacy of students of Administration course, who work and do not work. The study was conducted through a field research, descriptive, addressed quantitatively using statistical procedures. Was studied a population composed of 394 students distributed in three Higher Education Institutions, in the metropolitan region of Belém, in the State of Pará. The sampling was not probabilistic by accessibility, with a sample of 254 subjects. The instrument for data collection was a questionnaire composed of a set of questions divided into three sections: the first related to sociodemographic data, the second section was built to identify the work situation of the respondent and the third section was built with issues related to General Perceived Self-Efficacy Scale proposed by Schwarzer and Jerusalem (1999). Sociodemographic data were processed using methods of descriptive statistics. This procedure allowed characterizing the subjects of the sample. To identify the work situation, the analysis of frequency and percentage was used, which allowed to classify in percentage, the respondents who worked and those that did not work, and the data related to the scale of self-efficacy were processed quantitatively by the method of multivariate statistics using the software of program Statistical Package for Social Sciences for Windows - SPSS, version 17 from the process of Exploratory Factor Analysis. This procedure allowed characterizing the students who worked and the students who did not worked. The results were discussed based on Social Cognitive Theory from the construct of self-efficacy of Albert Bandura (1977). The study results showed a young sample, composed the majority of single women with work experience, and indicated that the characteristics of self-efficacy of students who work and students who do not work are different. The self-efficacy beliefs of students who do not work are based on psychological expectations, whereas the students who work demonstrated that their efficacy beliefs are sustained by previous experiences. A student who does not work proved to be reliant in their abilities to achieve a successful performance in their activities, believing it to be easy to achieve your goals and to face difficult situations at work, simply by invest a necessary effort and trust in their abilities. One who has experience working proved to be reliant in their abilities to conduct courses of action, although know that it is not easy to achieve your goals, and in unexpected situations showed its ability to solve difficult problems

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The present work analyzes the fast evolution of gated communities in Natal-RN´s urban space. Characterized by the occupation of large areas, providing private security and utilities, this kind of real estate use arises a long list of questions and issues from society and scholars, due to privatization of urban space, bending of law constraints and the lack of an integrated planning of the cities where they are built. The reasons for its fast growth in Brazil s urban areas are analyzed, considering the impact on formal urban planning and municipal services and on the identification of urbanistic, architectural pattern and constraints, as well as legal, social and economic issues. This study is based on the detailed analysis of the first three units of gated communities built in the urban space in Natal, between 1995 and 2003, including their evolution throughout time and the specific social and economic reasons for its present widespread adoption in Brazilian real estate market and, particulary, in our city. The main objective of this piece of work is to answer the why s and how s these phenomena evolved, setting a basis for the definition of adequate public policies and regulation of this kind of urban land use

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A self-flotator vibrational prototype electromechanical drive for treatment of oil and water emulsion or like emulsion is presented and evaluated. Oil production and refining to obtain derivatives is carried out under arrangements technically referred to as on-shore and off-shore, ie, on the continent and in the sea. In Brazil 80 % of the petroleum production is taken at sea and area of deployment and it cost scale are worrisome. It is associated, oily water production on a large scale, carrier 95% of the potential pollutant of activity whose final destination is the environment medium, terrestrial or maritime. Although diversified set of techniques and water treatment systems are in use or research, we propose an innovative system that operates in a sustainable way without chemical additives, for the good of the ecosystem. Labyrinth adsor-bent is used in metal spirals, and laboratory scale flow. Equipment and process patents are claimed. Treatments were performed at different flow rates and bands often monitored with control systems, some built, other bought for this purpose. Measurements of the levels of oil and grease (OGC) of efluents treaty remained within the range of legal framework under test conditions. Adsorbents were weighed before and after treatment for obtaining oil impregna-tion, the performance goal of vibratory action and treatment as a whole. Treatment technolo-gies in course are referenced, to compare performance, qualitatively and quantitatively. The vibration energy consumption is faced with and without conventional flotation and self-flotation. There are good prospects for the proposed, especially in reducing the residence time, by capillary action system. The impregnation dimensionless parameter was created and confronted with consecrated dimensionless parameters, on the vibrational version, such as Weber number and Froude number in quadratic form, referred to as vibrational criticality. Re-sults suggest limits to the vibration intensity

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The object of study of this thesis is the use of (self)training workshops as a fundamental process for the constitution of the teaching subject in mathematics education. The central purposes of the study were to describe and analyze a learning process of mathematics teachers supported by the training-research methodology, which procedures have been affected with the practice of (self)training workshops as a way of collaborating to the constitution of the teaching subject in Mathematics Education. The survey was conducted with a group of teachers in the city of Nova Cruz, Rio Grande do Norte through a process of continued education realized in the training workshops having as main goal the realization of the group s (self)training sessions in order to lead participants to the extent of their autonomy in their personal and professional transformations. The results obtained in the formative processes have shown the need to develop activities of mathematics teaching as a contribution to overcome the conceptual difficulties of the teachers, apart from their (self)reflections about themselves and the educational processes in which they belong. The results raised some propositions about (self)training workshops that may be incurred in practices to be included in the curriculum frameworks or materialize as a strategy of pedagogical work in training courses for teachers of mathematics. Also, they can constitute an administrative and educational activity to be instituted in the public schools of Basic Education

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior

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We propose a multi-resolution approach for surface reconstruction from clouds of unorganized points representing an object surface in 3D space. The proposed method uses a set of mesh operators and simple rules for selective mesh refinement, with a strategy based on Kohonen s self-organizing map. Basically, a self-adaptive scheme is used for iteratively moving vertices of an initial simple mesh in the direction of the set of points, ideally the object boundary. Successive refinement and motion of vertices are applied leading to a more detailed surface, in a multi-resolution, iterative scheme. Reconstruction was experimented with several point sets, induding different shapes and sizes. Results show generated meshes very dose to object final shapes. We include measures of performance and discuss robustness.