Investigação etnomatemática em contextos indígenas: caminhos para a reorientação da prática pedagógica

From the investigation, analysis, discussion and pondering about the activities developed by the lndians from the Porteira hamlet, members of the Xerente community, in the Tocantins state, we developed an investigative and descriptive study about the reality of this people with the aim of helping in the conceptual formation and in the reorientation of the pedagogical practice of the local teachers. In this sense, the undertaken research involved the teachers, the main representatives and experts in that cultural tradition, in order to investigate how the everyday activities (agriculture, food handling, assets distribution among the community members, etc.) and the cultural tradition (log race, body painting, clan division, Xerente numeration, Indian myths and histories, etc.), may enable the contextualization of the mathematics teaching in the lndian School Srêmtôwê of this hamlet, under a more transversal and globalizing perspective of the local and school knowledge. We based this research in the sociocultural conceptions of knowledge generation proposed by D Ambrosio (1990; 2002); Vergani (2007); Oliveras (1996); Gerdes (1991; 2002); Bishop (1999) e Sebastiani Ferreira (1997; 2004). ln the process of this study we propose some viable ways so that the Indian teachers may reorganize their classroom knowledge and actions, based in the strengthening of their history and culture. The observation of some social practices and knowledge as well as of the Xerente traditions helped us to point some possibilities of projection of a didacticalpedagogical dimension of these activities and practices, in the development of the school mathematical knowledge in this community

Pedagogia de projetos e etnomatemática: caminhos e diálogos na zona rural de Mossoró - RN

Teaching Mathematics in a contextualized and significant manner, in the world of the child and the adolescent, requires a solid theoretical and methodological basis on the part of the researcher. The present work found this foundation in two ways: teaching with projects and ethnomathematics. It is understood that these ways have points in common, such as: the real, interdisciplinarity, teaching methods, flexibility in sequencing the curriculum and interactive learning. This makes possible a theoretical cross-fertilization, which is important for the teaching/learning of Mathematics. Those points are merged in the present proposal, making possible new strategies, distinct from those of the Traditional Teaching Methodology and giving raise to an Alternative Teaching Methodology, which is to be lived in the Mathematics classrooms. This work gives a new direction to teaching, going beyond the traditional forms of education by allowing the teaching of Mathematics to become integrated with other school subjects, resulting in significant learning. In order to implement the proposal, it is necessary to form partnerships with teachers, pupils and the whole community, so that the way can be traced by continual dialogue

Caminhos da educação pela Transamazônica: ressignificando o saber cotidiano e as práticas educativas de educadores(as) do campo

Este trabajo recupera los caminos de la educación por la Transamazonica y analiza las prácticas educativas de educadores(as)-educandos(as) del campo, desarrolladas en los espacios educativos de los asentamientos, con el foco en la relación teoríapráctica y acción-reflexión-acción que involucran el tiempo-escuela y el tiempocomunidad del Curso de Magisterio de la Tierra en al Transamazonica (2005/2008), con el objetivo de preparar y cualificar educadores(as) para actuar en la Educación Infantil, Enseñanza Básica/ primaria y Educación de jóvenes y adultos y diseminar los principios y presupuesto de la Educación del y en el Campo. En la misma perspectiva de garantizar un perfil profesional, anclado en la autonomía y en la emancipación, capaz de transformar la realidad, los actores desencadenan una formación profesional Continua, articulada a la organización social, con el objetivo de proporcionar las condiciones para el desarrollo de una docencia dinámica, fondada en la interdisciplinaridad, en la praxis, en la relación democrática entre educador(a) y educando(a) y en la afirmación de la triade Campo, Educación del-en el Campo y Políticas Públicas, de manera a contribuir para la construcción del proyecto de desarrollo del Campo, según la visión de los actores sociales de la Región. El análisis de las prácticas educativas es producto de la reflexión realizada por los/ las educadores(as)-educando(as) y de la observación traducida por la participación en reuniones, talleres, encuentros y en el tiempo-escuela, en los cuales se destacan los procesos vividos en el Curso por el grupo, la transformación de la cultura de la aula en los asentamientos, la participación activa, por medio del compromiso social que se concreta por la dinámica desarrollada en el tiempo-comunidad. Ese compromiso genera experiencias y aprendizajes diferenciados, que se refleja en las prácticas educativas desarrolladas por los/ las educadores(as)-educando(as). El estudio lleva en cuenta las tensiones, los conflictos y los aprendizajes con respecto al aspecto teoría-práctica, a los desafíos, al diálogo y a la docencia

Uma odisséia em busca de Héstia: do turismo à hospitalidade pelos caminhos das representações sociais

This thesis is the result of a piece of research on hospitality social representations between tourism professionals and academics in the city of Natal. The reasearch s corner stone is the point of the view that the notion of hospitality, with all its theoretical and practical implications, is essential to the success of any tourist destination. Is there any relevance in the growing use of the word, almost as a synonym for tourism? How is this notion, first learned in the domestic context and then exercised in the contact with the city and especially with visitors, represented in the learning process for professional practice and in the exercise of professional tourist reception itself? In order to answer this question, initially we chose to study the concept of hospitality in their current academic view, with reference to the French school, which binds hospitality to the maussian perspective of donation, and other scholars of the current theme, with emphasis on the research performed in the program of Master of Hospitality at the Anhembi Morumbi University, whose philosophy imprints in the hospitality concept the same sense we want to give this study. Then we chose to analyze the notion of hospitality, by the Social Representations Theory, in light of Moscovici s methodology, as well as the analysis of the core of this concept among tourism professionals and students. It was found that hospitality is still a very diffuse reference to representations of these two groups and that academic education, if accepted both theoretical and practical implications of this research s starting point, will still have a long way to go. Cities such as Natal, "naturally" hospitable, according to its dwellers, where tourism is relevant to their economies, need (re)thinking and (re)organizing, continuously, their actions towards quality and performance of their professional training especially those concerned with receptive structure

Trilhando os caminhos da educação: um olhar sobre a universidade da floresta Acre

!Acre! Un lugar místico marcado por las luchas y conquistas que traen en su historia las bellezas de sus riquezas naturales y la diversidad cultural. Este es el escenario en que se constituye ese trabajo como resultado de estudios sobre la implantación de una universidad en la región del Alto Juruá-Acre, denominada de Universidad de la Floresta. Esta surge como proceso de fortalecimiento y expansión del Campus de la Universidad Federal de Acre, en el município de Cruzeiro del Sul. Envuelto por los movimientos sociales que cambiaron los rumbos de su historia, incluyendo la identidad acreana, Acre resguarda a sus hijos el derecho de exigir conciencia ecológica y desarrollo con la preservación de la floresta y de la sustentabilidad. Así, los movimientos como empates, socioambientalismo y florestanía impulsionarán el proyecto de implantación de la Universidad de la floresta, donde el reconocimiento de los saberes de las poblaciones tradicionales y el convívio diário de eses pueblos con la naturaleza representa un nuevo paradigma para el concepto de universidad. Todo eso apunta para una nueva forma de pensar y sistematizar la educación. Para el desarrollo del análisis sobre la implantación de esra universidad me fundamenté en los princípios referendados por el abordaje de la complejidad a travéz de los pensamientos de grandes sábios, entre los cuales destaco Edgar Morin, Claude Lévi-Straus y Conceição Almeida. Para transitar metodológicamente opté por trillar en caminos futiristas, donde mi escrita se construye a partir de mi punto de vista, de mi sentir y de mis conversaciones con la Floresta. De esta forma, presento los princípios y la estructura interinstitucional de la universidad de la Floresta, formada por tres grandes ejes: Centro de formación y tecnologías de la Floresta CEFLORA, Instituto de la Biodiversidad y Manejo Sustentable de los recursos Naturales IB y el Campus UFAC / Floresta. Estas tres unidades deverán funcionar de modo integrado componiendo el tripé enseñanza, pesquisa y extensión de la Universidad de la Floresta. Por fin, delante de la especificidad de esta universidad y de sus propuestas, afirmo la importancia de interactuar los saberes de la tradición a los saberes de la academia como forma de valorizar lLa cultura de los pueblos de la floresta

Pelos caminhos das idéias e da existência: a propósito das cartografias de J. T. de Moura Filho

The present study aimed to investigate the intellectual, personal and professional tracjetory of José Tavares de Moura Filho. Civil engineer who devoted him self to cartographic cience, though not a cartographer, and to literature. At 65 years old, already with retirement, he devoted his attention to writing his books and see the world, as he said. There were nine books, five of poetry, prose and short stories, and four of cartographic nature. The published his books independently. He wrote and his wife Elza typed. Once ready, he would seek the graphics, later a publisher, to reproduce his writing. He liked to say he would rather to pay for your books than bay a new car, and did so. Died at age of 82 years, leaving a rich material for the young students, those who read, as he always did by dedicating his books. In order to achieve the objectives of this study, we used as a theoretical some authors dealing with historiography, oral history, intellectual intineraries and history of ideas, as Garnica, Nóvoa, Barros, Bosi, Le Goff among others. From this perspective, we constructed an archeology of ideas and the existence of Moura Filho, to point contributions of the teaching of mathematics from his work

História oral de vida de pacientes transplantados renais: novos caminhos a trilhar

The therapeutic possibilities for chronic renal failure closely are related to the biological and social condition, and in this perspective the renal transplant is considered the best option, for providing quality of life better. This study it objectified to apprehend, by means of the rescue of the verbal history of life of the kidney transplant patients, the experiences lived since the diagnosis of the renal to the current with the current therapeutic modality. One is about a study of qualitative boarding, exploratory and descriptive, having the verbal history of life as a technique and method. The colony was formed with the ten first kidney transplant patients of the Rio Grande of the North, taken care of in the clinic of the Nephrology in the University Hospital Onofre Lopes-UFRN, located in the city of Christmas-RN. The net was composed for collaborators of both the sex, in the age band between 21 and 56 years of age, submitted it more than has one year to the renal transplant and that, in some cases, together of its familiar ones, they had voluntarily accepted to participate of the study. The first collaborator interviewed for this was excluded not to desire to participate the study more than. After approval for the Committee of Ethics in Search of the UFRN, we carry through the collection of data, by means of a halfstructuralized interview, recorded individually, in environment chosen for the collaborators. We carry through the transcription of the interviews and later we return to the interviewed ones so that the same ones made the conference, what it made possible in them to carry through the transcriation, after consecutive readings. We analyze the stories by means of the analysis of content of Bardin. Guiding the analysis of the stories of the collaborators, we find three axles thematic: Impact in the social relations, Impact in the social condition and Behavior front the illness and treatment. We conclude in this study that the loss of the renal function reed-echo drastically in the life of the collaborators, but that the acceptance of the pathological condition emerged, mainly for the support of the family and in the belief in God. The renal transplant was seen as the chance for a new life, however, so that they reach an improvement in the quality of life, other questions must be optimized, as the guarantee of constitutional laws, the rescue of the citizenship and offer of bigger support of the professionals of the health, family and society for the confrontation of the problems generated for the chronic renal illness and its treatments

Localização e planejamento de caminhos para um robô humanóide e um robô escravo com rodas

This work presents the localization and path planning systems for two robots: a non-instrumented humanoid and a slave wheeled robot. The localization of wheeled robot is made using odometry information and landmark detection. These informations are fused using a Extended Kalman Filter. The relative position of humanoid is acquired fusing (using another Kalman Filter) the wheeled robot pose with the characteristics of the landmark on the back of humanoid. Knowing the wheeled robot position and the humanoid relative position in relation to it, we acquired the absolute position of humanoid. The path planning system was developed to provide the cooperative movement of the two robots,incorporating the visibility restrictions of the robotic system

Extração de ferro da cera de carnaúba utilizando sistemas microemulsionados

The constant search for biodegradable materials for applications in several fields shows that carnauba wax can be a viable alternative in the manufacturing of biolubricants. Carnauba wax is the unique among the natural waxes to have a combination of properties of great importance. In previous studies it was verified the presence of metals in wax composition that can harm the oxidative stability of lubricants. Considering these factors, it was decided to develop a research to evaluate iron removal from carnauba wax, using microemulsion systems (Me) and perform the optimization of parameters, such as: extraction pH, temperature, extraction time, among others. Iron concentration was determined by atomic absorption and, to perform this analysis, sample digestion in microwave oven was used, showing that this process was very efficient. It was performed some analysis in order to characterize the wax sample, such as: attenuated total reflectance infrared spectroscopy (ATR-IR), thermogravimetry (TG), differential scanning calorimetry (DSC), energy dispersive X-ray fluorescence (EDXRF), scanning electron microscopy (SEM) and melting point (FP). The microemulsion systems were composed by: coconut oil as surfactant, n-butanol as cosurfactant, kerosene and/or heptanes as oil phase, distilled water as water phase. The pH chosen for this study was 4.5 and the metal extraction was performed in finite experiments. To evaluate Me extraction it was performed a factorial design for systems with heptane and kerosene as oil phase, also investigating the influence of temperature time and wax/Me ratio, that showed an statistically significant answer for iron extraction at 95% confidence level. The best result was obtained at 60°C, 10 hours contact time and 1: 10 wax/Me ratio, in both systems with kerosene and heptanes as oil phase. The best extraction occurred with kerosene as oil phase, with 54% iron removal

Oxidação úmida de fenóis com catalisadores de ferro suportado em argilominerais em reator de leito de lama (slurry)

The wet oxidation of organic compounds with CO2 and H2O has been demonstrated to be an efficient technique for effluent treatment. This work focuses on the synthesis, characterization and catalytic performance of Fe-MnO2/CeO2, K-MnO2/CeO2/ palygorskite and Fe/ palygorskite toward the wet oxidative degradation of phenol. The experiments were conducted in a sludge bed reactor with controlled temperature, pressure and stirring speed and sampling of the liquid phase. Experiments were performed on the following operating conditions: temperature 130 ° C, pressure 20.4 atm, catalyst mass concentration of 5 g / L initial concentration of phenol and 0.5 g / L. The catalytic tests were performed in a slurry agitated reactor provided with temperature, pressure and agitation control and reactor liquid sampling. The influences of iron loaded on the support (0.3; 7 and 10%, m/m) and the initial pH of the reactant medium (3.1; 6.8; 8.7) were studied. The iron dispersion on the palygorskite, the phase purity and the elemental composition of the catalyst were evaluated by X-Ray Difraction (XRD), Scanning Electron Microscopy (SEM) and X-Ray Flourescence (XRF). The use of palygorskite as support to increase the surface area was confirmed by the B.E.T. surface results. The phenol degradation curves showed that the Fe3+ over palygorskite when compared with the other materials tested has the best performance toward the (Total Organic carbonic) TOC conversion. The decrease in alkalinity of the reaction medium also favors the conversion of TOC. The maximum conversion obtained from the TOC with the catalyst 3% Fe / palygorskite was around 95% for a reaction time of 60 minutes, while reducing the formation of acids, especially acetic acid. With products obtained from wet oxidation of phenol, hydroquinone, p-benzoquinone, catechol and oxalic acid, identified and quantified by High Performance Liquid Chromatography was possible to propose a reaction mechanism of the process where the phenol is transformed into the homogeneous and heterogeneous phase in the other by applying a kinetic model, Langmuir-Hinshelwood type, with evaluation of kinetic constants of different reactions involved.

Propriedades magnéticas de nanopartículas de ferro em substratos antiferromagnéticos

The effect of finite size on the magnetic properties of ferromagnetic particles systems is a recurrent subject. One of the aspects wide investigated is the superparamagnetic limit where the temperature destroys the magnetic order of ferromagnetic small particles. Above the block temperature the thermal value of the magnetic moment of the particle vanishes, due to thermal fluctuations. The value of the blocking temperature diminishes when the size of the particle is reduced, reflecting the reduction of the anisotropy energy barrier between the uniform states along the uniaxial axis. The increasing demand for high density magnetic media has recently attracted great research interest in periodic arrangements of nanometric ferromagnetics particles, approach in the superparamagnetic limit. An interesting conjecture is the possibility of stabilization of the magnetic order of small ferromagnetic particles (F) by interface coupling with antiferromagnetic (AF) substrate. These F/AF systems may also help to elucidate some details of the effect of exchange bias, because the effect of interface roughness and the paper of domain walls, either in the substrate or the particle, are significantly reduced. We investigate the magnetic phases of small ferromagnetic particles on a antiferromagnetic substrate. We use a self-consistent local field method, incorporating the interface field and the dipole interaction between the spins of the ferromagnetic particle. Our results indicate that increasing the area of the interface favors the formation of the uniform state. Howere above a critical height value appears a state non-uniform is formed where the spins of in the particle s free surface are rotated with respect to the interface spins direction. We discuss the impact of the competition between the dipolar and interface field on the magnetic charge, that controls the field of flux leakage of the particle, and on the format of the hysteresis curves. Our results indicate that the liquid magnetic charge is not a monotonically increasing function of the height of the particle. The exchange bias may display anomalous features, induced for the dipolar field of the spins near the F/AF interface

Fraturas e caminhos ótimos na rede de Barabasi-Albert

Following the study of Andrade et al. (2009) on regular square lattices, here we investigate the problem of optimal path cracks (OPC) in Complex Networks. In this problem we associate to each site a determined energy. The optimum path is defined as the one among all possible paths that crosses the system which has the minimum cost, namely the sum of the energies along the path. Once the optimum path is determined, at each step, one blocks its site with highest energy, and then a new optimal path is calculated. This procedure is repeated until there is a set of blocked sites forming a macroscopic fracture which connects the opposite sides of the system. The method is applied to a lattice of size L and the density of removed sites is computed. As observed in the work by Andrade et al. (2009), the fractured system studied here also presents different behaviors depending on the level of disorder, namely weak, moderated and strong disorder intensities. In the regime of weak and moderated disorder, while the density of removed sites in the system does not depend of the size L in the case of regular lattices, in the regime of high disorder the density becomes substantially dependent on L. We did the same type of study for Complex Networks. In this case, each new site is connected with m previous ones. As in the previous work, we observe that the density of removed sites presents a similar behavior. Moreover, a new result is obtained, i.e., we analyze the dependency of the disorder with the attachment parameter m

Caminhos para a universalização dos serviços de água e esgotos no Brasil: a atuação das entidades reguladoras para indução da eficiência dos prestadores de serviços

The deficit of water and sewerage services is a historic problem in Brazil. The introduction of a new regulatory framework, in 2007, presented ways intending to overcome these deficits, among them, the providers efficiency improvement. This thesis aims to analyze the regulators performance regarding its ability to induce the efficiency of the Brazilian water and sewerage services providers. To this end, an analytical approach based on a sequential explanatory strategy was used, and it consists of three steps. In the first step, the Data Envelopment Analysis ( DEA ) was used to measure the providers efficiency in 2006 and 2011. The results show that the average efficiency may be considered high; however significant inefficiencies among the 29 analyzed providers were detected. The ones in the Southeast region showed better performance level and Northeast had the lowest. The local and the private providers were more efficient on average. In 2006 and 2011 the average performance was higher among non-regulated providers. In 2006 the group regulated by local agencies had the best average performance, in 2011, the best performance was the group regulated by the consortium agencies. To analyse the second step was used the Malmquist Index, it pointed that the productivity between 2006 and 2011 dropped. The analysis through decomposing Malmquist Index showed a shift of technical efficiency frontier to a lower level, however was detected a small provider s advance towards the frontier. Only the Midwest region recorded progress in overall productivity. The deterioration in the total factor productivity was higher among regional providers but the local ones and the private agencies moved quickly to the frontier level. The providers regulated from 2007 showed less decrease on the total productivity and the results of the catch up effect were more meaningful. In the last step, the regulators standardization activity analyses noted that there are agencies that had not issued rules until 2011. The most standards topics discussed in the issued rules were the tariff adjustments and the setting of general conditions for the provision and use of services; in another hand, the least covered topics were new technologies incentive and the introduction of efficiency-inducing regulatory mechanisms and productivity gains for price reviews. Regulators created from 2007 were more active proportionately. Even with the advent of the regulatory framework and the creation of new regulatory bodies, the evidence points to a reality in which the actions of these agencies have not been ensuring that providers of water and sewage, regulated by them, has achieved better performance. The non- achievement of regulatory goals can be explained by the incipient level of performance of the Brazilian regulatory authorities, which should be strengthened because of its potential contribution to the Brazilian basic sanitation department

Prática de coordenação pedagógica e concepções acerca da atuação em psicologia escolar: desvendando um contexto, repensando caminhos

Considering the necessary approaches with the quotidian of the pedagogical field mentioned in the recent productions in Psychology about the insertion of psychologists in the school field, the objective of this work was to know and to understand the dynamics of functioning of a team of pedagogical coordination, intending to produce reflections on the possibilities of action in school psychology with these professionals. Our field of research was the Municipal School Teacher Emília Ramos (EMPER), considering its peculiar history, distinguished by a constant effort of achievement of the school success by its pupils. As subject of the study, six pedagogical coordinators participated, who worked at the school in the diurne turns, where regular classrooms of 1º cycle of basic education functioned. As procedures, we use participant observations and open interviews, focusing the activities performed by the coordinators and its possible demands to psychology. We use the analysis of content for the production of results. These results evidenced a work of coordination realized on a structured routine, but flexible, centered around the activity of conduction of groups of studies with the teachers. We grouped the demands to psychology in four thematic groups: diagnosis and attending the pupils; orientation to the families, contribution in the formation of the professionals and clinical listening of the professionals of the school. In this way, it is made clear that, in a context where happens a well articulated and consistent pedagogical work, the possible performance in school psychology is not scrumbled or confused with social and pedagogical practical others which many times takes attendance. With these information, we expect to contribute for the theoretical and practical elaborations, in Psychology and the Pedagogy, compromised with the success of the educative work realized in the public schools

Caminhos e descaminhos da adesão ao tratamento anti-hipertensivo :um estudo com usuários do Pacha (Programa de Assistência e Cuidado da Hipertensão Arterial) do Hospital Universitário Onofre Lopes

The high blood pressure is a multifactorial chronic disease which possesses emotional and social features in the illness appearance and evolution and in the adherence to the treatment which involves a decision-making through patient so that he or she process the necessary changes on harmful living habits. Adhesion, traditionally, it is referred to the patient to answer to the doctor orientations or of other health professional, about the appearance to the appointment with a doctor, about the use of medicine or lifestyle changes and maintaining this adhesion is the main problem to be overcame. It is expected the adhesion will ever be a continual, stable and satisfactory action, disregarding the complexity of subjectivity processes which permeate the sicken. This research aimed to investigate the difficulties which the person with high blood pressure has to adhere to the treatment, from the signification processes which give sense to the actions dealing with the adhesion. The study was carried out with 48 users of assistance program to the high blood pressure patient from Hospital Universitário from Natal RN, between 40-65 age. The answers were submitted to a double analysis process: 1) answer systematization in categories and codes and admission in statistical program SPSS (Statistical Package of Social Science), for generation of descriptive statistics; 2) Sense and signification analysis which permeated the deepener statement and interpretatively. The greater difficulties found are present on low-salt and law-calorie diets, in the dealing with everyday feeling and stress, being these factors cited as direct motive to the high blood pressure, regardless of interviewee s sex. It is observed there is not adhesion, but adhering, as an experienced everyday process. This work contributes with its results, assessing the used strategies by program with the aim of increasing the adhesion rates