Indicadores de idoneidade didática em contexto de formação inicial de professores: o caso da Ana

O objetivo desta comunicação é apresentar um caso sobre a aplicação do conceito de idoneidade didática, num contexto de formação inicial de professores de matemática, desenvolvido numa Instituição do Ensino Superior portuguesa. O caso apresentado indica que a futura professora revela conhecer, compreender e valorizar o conceito de idoneidade didática, através da sua aplicação coerente e sustentada, quer ao nível da preparação do ensino de um conceito matemático, quer ao nível da reflexão após o processo de ensino desse mesmo conceito. O caso desta futura professora permite compreender a contribuição da idoneidade didática na promoção de competências na análise didática do ensino e da aprendizagem de conceitos matemáticos.Abstract. This presentation has the goal of depicting a case concerning the application of the concept of didactical suitability, in a context of mathematics teachers' initial training, developed in a Portuguese University. The case in question shows a teacher apprentice that is aware of and intent on valuing the concept of didactical probity through its cohesive and sustained application. The future teacher accomplishes this as much at the step of teaching preparation regarding a mathematical concept, as at the step of posterior reflection on the teaching process of said concept. This future teacher's case allows us to understand the contribution of didactical suitability in the promotion of competences in didactical analysis of the teaching and learning of mathematical concepts

Non trivial critical exponents for finite temperature chiral transitions at fixed total fermion number

We analyze the finite temperature chiral restoration transition of the $(D=d+1)$-dimensional Gross-Neveu model for the case of a large number of flavors and fixed total fermion number. This leads to the study of the model with a nonzero imaginary chemical potential. In this formulation of the theory, we have obtained that, in the transition region, the model is described by a chiral conformal field theory where the concepts of dimensional reduction and universality do apply due to a transmutation of statistics which makes fermions act as if they were bosons, having zero energy. This result should be generic for theories with dynamical symmetry breaking, such as Quantum Chromodynamics.Comment: 14 pages Latex, no figures, final version to be published in Phys. Lett.

Thermodynamical behavior of the Blume-Capel model in the vicinity of its tricritical point

We investigate the thermodynamic properties of the zero-field Blume-Capel model in the vicinity of its tricritical point (TCP). We calculate the quadrupole moment, internal energy, and entropy densities employing an exact numerical recursion procedure for the model defined on a hierarchical lattice of fractal dimension $d$. We explore the scaling behavior of the isothermal quadrupolar susceptibility and, the isothermal and constant crystal-field specific heat as a function of the temperature and the reduced crystal-field parameter along the ferromagnetic and the \emph{ordered paramagnetic} phase frontier. Results achieved for systems with dimensions $d=2$ and $3$ exhibit the main features of the continuous and first-order transitions in the TCP neighborhoods. We also probe the phase coexistence in the $\lambda$-diagram and the latent heat in the vicinity of the tricritical point locus.Comment: 20 pages, 11 figure

On the Integrability and Chaos of an N=2 Maxwell-Chern-Simons-Higgs Mechanical Model

We apply different integrability analysis procedures to a reduced (spatially homogeneous) mechanical system derived from an off-shell non-minimally coupled N=2 Maxwell-Chern-Simons-Higgs model that presents BPS topological vortex excitations, numerically obtained with an ansatz adopted in a special - critical coupling - parametric regime. As a counterpart of the regularity associated to the static soliton-like solution, we investigate the possibility of chaotic dynamics in the evolution of the spatially homogeneous reduced system, descendant from the full N=2 model under consideration. The originally rich content of symmetries and interactions, N=2 susy and non-minimal coupling, singles out the proposed model as an interesting framework for the investigation of the role played by (super-)symmetries and parametric domains in the triggering/control of chaotic behavior in gauge systems. After writing down effective Lagrangian and Hamiltonian functions, and establishing the corresponding canonical Hamilton equations, we apply global integrability Noether point symmetries and Painleveproperty criteria to both the general and the critical coupling regimes. As a non-integrable character is detected by the pair of analytical criteria applied, we perform suitable numerical simulations, as we seek for chaotic patterns in the system evolution. Finally, we present some Comments on the results and perspectives for further investigations and forthcoming communications.Comment: 18 pages, 5 figure

Hybrid Neuroprosthesis for Lower Limbs

Assistive technologies have been proposed for the locomotion of people with spinal cord injury (SCI). One of them is the neuroprosthesis that arouses the interest of developers and health professionals bearing in mind the beneficial effects promoted in people with SCI. Thus, the first session of this chapter presents the principles of human motility and the impact that spinal cord injury causes on a person’s mobility. The second session presents functional electrical stimulation as a solution for the immobility of paralyzed muscles. It explains the working principles of constituent modules and main stimulatory parameters. The third session introduces the concepts and characteristics of neural prosthesis hybridization. The last two sessions present and discuss examples of hybrid neuroprostheses. Such systems employ hybrid assistive lower limb strategies to evoke functional movements in people with SCI, associating the motor effects of active and/or passive orthoses to a functional electrical stimulation (FES) system. Examples of typical applications of FES in rehabilitation are discussed

Da percepção à ação: uso da água por alunos do ensino fundamental no Colégio da Polícia Militar (CPM) unidade IX Custódia da Silva Pedreira em Porto Nacional – TO, Brasil

The waste of drinking water is one of the factors that may favor the feared scarcity of this resource and has become a cause of concern for the maintenance of human survival. Thus, its rational use can be education-oriented. Environmental Education can be developed in various social gatherings, and especially in school. Thus, the objective of this work is to understand the perception that elementary school students have about water through their use in school. It is a descriptive research based on observation and bibliographical readings related to the theme. Methodological instruments were applied structured questionnaire with objective questions about water use in school, where the results were tabulated, analyzed and discussed. The study revealed the need for students to continue deepening their knowledge about water use and avoiding waste, so that they feel responsible for preserving this resource beyond school.O desperdício de água potável apresenta-se como um dos fatores que pode favorecer a temida escassez deste recurso e tem se tornado motivo de preocupação para a manutenção da sobrevivência humana. Assim, seu uso racional pode ser orientado pela educação. A Educação Ambiental pode ser desenvolvida em vários convívios sociais, e, em especial, na escola. Dessa forma, o objetivo desse trabalho é compreender a percepção que alunos do 7º ano do Ensino Fundamental têm sobre a água, por meio do seu uso na escola. É uma pesquisa descritiva pautada na observação e leituras bibliográficas relacionadas ao tema. Teve como instrumentos metodológicos aplicação de questionário estruturado com questões objetivas sobre uso da água na escola, onde os resultados obtidos foram tabulados, analisados e discutidos. O estudo revelou a necessidade dos alunos continuarem aprofundando seus conhecimentos sobre o uso da água e evitar seu desperdício, de modo que se sintam responsáveis por preservar esse recurso para além da escola

A relevância das informações gerenciais no planejamento estratégicos: paradigma nas tomadas de decisões empresáriais

Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico. Programa de Pós-Graduação em Engenharia de Produção.Este trabalho apresenta uma proposta de desenvolvimento e fortalecimento do profissional, com ênfase ao Administrador quanto à sua percepção, criação, planejamento, organização e gestão de informações gerenciais, conscientizando-o e capacitando-o para dar uma contribuição relevante e definitiva no novo paradigma do profissional que administra processos empresariais, e da evolução organizacional no ambiente competitivo do mercado atual. O assunto foi organizado a partir de premissas para que o executivo possa administrar as diversidades dos aspectos que influenciam no delineamento da estratégia, redesenhar a empresa, seus conceitos, sua posição perante a comunidade local e mundial. Neste trabalho, pretende-se nortear o administrador catalisador através da arte de gerenciar para a construção do perfil do profissional que administra empresas e nos pressupostos dos paradigmas para o desenvolvimento de habilidades e competências necessárias ao bom desempenho de funções empresariais, como caráter direcionador do gestor dentro das dimensões de um mercado globalizado. Apregoa-se demonstrar a realidade no ambiente global, atrelandose à competição e com base neste cenário demonstrar um novo paradoxo enfrentado pelas empresas que almejam desfrutar de novos mercados e de oportunidades sem precedentes baseados na informação e na sua disseminação no ambiente organizacional. Reporta-se ainda a algumas ferramentas gerenciais utilizadas pelos dirigentes das empresas para se conseguir lograr sucesso no processo de tomada de decisão, salientar a influência do controle para evitar e minimizar os comportamentos disfuncionais em uma empresa. This work introduces a proposal and professional's invigoration, with emphasis to the Manager in the perception, creation, planning, managerial information organization and administration, make him conscience and enabling him to give an important and definitive contribution to the professional's new paradigm who manages processes, and the company development into the current market competitive environment. The subject was organized from premises so that the executive can manage the diversities that influence in the strategy delineation, redraw the company, their concepts, your position in front the local and world community. In this work, it intends to direct the catalytic manager through the art of managing for construction of the professional profile of who manages companies and to presuppose the paradigms for development of the abilities and necessary competences to a good managerial performance, as managing direct character inside the dimensions of a global market. It reveals the reality in the global environment, harnessing to the competition and with base in this scenery demonstrate a new paradox faced by the companies which want enjoy new markets and unprecedented opportunities based in the information and in the information and in its sowing of the company environment. It describes still to some managerial findings used by the companies leaders for archive manages success in the decision outlet process, point out the control influence to avoid and to minimize the dysfunctio