O círculo de eranos: a experiência da educação do campo ou como os contextos podem gerar

RESUMO: Estamos a vivenciar dois fatos paradoxais: de um lado, uma organização da escola instituída que gera a autoconservação das práticas do professor e, do outro, tendências nos plano científico e do discurso político que apelam ao retorno ao ator - que reconhece o professor como sujeito de seu saber e fazer. Foi neste contexto que se realizou a pesquisa subjacente a esta tese sobre a formação docente num projeto de escolarização que se fundamenta numa perspetiva de educação popular contra-hegemónica, edificada, no Brasil, como ‗educação do campo‘. Buscou-se compreender a vivência docente, suas perceções e aprendizagens. Desenvolveu-se a investigação a partir das questões: é possível, no contexto atual de mudanças sociais direcionadas ao processo cada vez maior de individuação docente, a formação em democracia participativa numa experiência de educação popular? Como ela se estabelece? O que ela nos ensina? A metodologia assentou na observação participativa das reuniões de planeamento, avaliação e replaneamento dos(as) professores(as) e coordenadores, numa proposta local de educação do campo - do Programa Nacional de Educação na Reforma agrária. As reuniões e escolarização ocorreram em Ilhéus/Bahia/Brasil, durante os anos de 2005-2006. As referências teóricas para a análise empírica do material coletado foram: a perspetiva da reflexão-ação emancipatória de Carr e Kemmis (1998), que compreende as instituições educacionais criadas por pressões sociais e políticas; e a conceção de emancipação desenvolvida por Freire e por Habermas, assente na ação comunicativa/dialógica. Para a análise utilizou-se o método da Análise Crítica de Discurso (ACD), cuja principal referência foi Fairclough. Nas narrativas das reuniões percebeu-se o desenvolvimento de uma polidez positiva – atos de fala que demonstram o falante desejando estabelecer o consenso com ouvinte; assinalada por estruturas modais que direcionaram para a abertura de relacionamento e participação mútua entre professores(as) e coordenadores do projeto. O conteúdo manifesto das falas amparou-se numa perspetiva de educador que se constrói na prática, e, ao mesmo tempo, a constrói, mas que, entretanto, necessita de aportes teóricos críticos no processo de embate epistémico entre os saberes da vida quotidiana concreta e os saberes científicos. A função interpessoal foi expressa pela arquitetura dialógica, permitindo um processo de construção mútua de escola e professores(as). Pode-se afirmar que a prática analisada indica que nestes tempos, de controlo intenso das instituições escolares, de competição, de solidão, é obviamente necessária a organização coletiva de professores (as), de movimentos sociais e universidades, amparados e financiados por ordenamentos legais (conquistados pela população), para consolidar e ampliar projetos críticos de escolarização, mudando, reciprocamente, escolas e professores(as). ABSTRACT: We are experiencing two paradoxical facts: the organization of the established school which generates the self-preservation of teaching practices and, on the other hand, there is a political and scientific trend that claims the return of the ―actor‖ – the teacher being the subject of his knowledge and actions. It was therefore in this context, that the underlying research for this Thesis was conducted. It concerns to the teacher training in an educational project which is based on the perspective of a counter-hegemonic and popular education available to people at the Brazilian countryside – also called ―Field Education‖. We searched the understanding of the educational experience, its perceptions and learning. The investigation was developed from two fundamental questions: Is it possible to have the experience of a popular education system in a functioning democracy, at the light of the recent social changes that lead to a greater individuation? How is it established? What can we learn from it? The methodology was settled on the participant observation of the planning and evaluation meetings of teachers and coordinators of the National Education Program in the Land Reform in Brazil. These meetings occurred in Ilheús- Bahia- Brazil during the years of 2005-2006. The theoretical references to the empirical analyses of the material collected were: the perspective of the reflection – action emancipative of Carr & Kemmis (1998), which comprehends the educational institutions created by social and political pressures; and the conception of emancipation developed by Freire and Habermas, which is settled on the communicative-dialogical action. For the analysis it was elected the method of Critical Analysis of Discourse (CAD),which main reference was Fairclough. During the account of the meetings it was noticed the development of a positive politeness – which reveals the desire of the speaker to reach an agreement with the listener, signalized by modal structures that directed to an open and participative relationship between teachers and coordinators of the project. The manifest content of the speeches was sustained by the educator perspective, which is built on the daily practice. However, it needs some basic theoretical contributions to the epistemic struggle between concrete ordinary life and the scientific knowledge. The interpersonal function was expressed by dialogical architecture, allowing a mutual process of construction that involves the school and the teachers. The practice analyzed indicates that, more than ever, due to the massive control of the institutions, the extreme competition and solitude, the collective organization of the teachers, the social movements and the universities is necessary. They should be supported and financed by legal systems to consolidated and amplify important education projects, bringing necessary changes for schools and teachers reciprocally.

Imagem por ressonância magnética da vasculatura da pele humana : viabilidade no contexto clínico

Imagiologia por Ressonância Magnética (IRM) é uma modalidade de imagem médica que está a recuperar o interesse como uma técnica não invasiva no estudo da pele. Tipicamente campos magnéticos de elevada densidade e quipamentos específicos são usados. Este facto limita o usos da técnica a laboratórios e centros de investigação especializados. Neste trabalho estudou-se a viabilidade do uso da IRM no estudo da pele e da sua vasculatura usando equipamento convencional disponível em contexto clínico. Sequências IRM para imagem estrutural e veascular foram optimizadas e testadas para obtenção de imagens da pele do punho de 6 voluntários saudáveis. As sequências observáveis dos vasos, razão sinal-ruído, e razão contraste-ruído. Foi observado que duas sequências volumétricas baseadas em eco de gradiente e com ponderações T1 e T2 forneciam informação complementar em respeito à vasculatura da pele com resoluções espaciais da ordem dos micrómetros, podendo ainda esta informação ser fundida com imagens estruturais das cadamas da pele. Foi igualmente observado que estas sequências fornecem informação útil usando equipamento convencional e perspectiva-se a sua utilização no estudo das vasculatura de tumores cutâneos e na doença vascular periférica.

Saberes docentes mobilizados no ensino de EJA e sua relevância na vida cotidiana do aluno

A preocupação central desta pesquisa foi compreendermos quais os saberes docentes que o professor de EJA mobiliza na organização do seu trabalho em sala de aula e a relevância desses saberes no cotidiano do aluno de Escolas Estaduais da cidade de Garanhuns, Pernambuco, Brasil. A pesquisa foi conduzida com 100 discentes da EJA que estudam em quatro escolas da referida cidade e com oito docentes que lecionam nas referidas Instituições. Procedeu-se à aplicação de um questionário validado e adaptado aos discentes e uma entrevista semi-estruturada aos docentes dessa modalidade. A análise dos dados quantitativos foi realizada por meio do programa SPSS; enquanto a análise dos dados qualitativos foi orientada pela análise de discurso. Os resultados evidenciaram a falta de formação profissional específica dos docentes para trabalhar com a EJA, bem como a necessidade de uma política educacional voltada para essa modalidade de ensino, visto que, apesar de a maioria dos professores recorrerem aos diferentes saberes adquiridos em sua trajetória, a educação de jovens e adultos ainda expressa um reflexo de exclusão e ideologia apresentando bastante dificuldade. Assim, sugere-se que muito se tem a evoluir para que toda a potencialidade utilizada a favor do ensino de jovens e adultos obtenha sucesso, tanto para construção das práticas pedagógicas de seus docentes quanto para a facilitação do processo de ensino-aprendizagem com os alunos.

Representation of Cued Speech in teacher of the deaf and hard of hearing preparation programs

This descriptive study investigates the representation of Cued Speech in teacher of the deaf preparation programs as well as attitudes towards inclusion of Cued Speech in those programs in the context of the 2004 reauthorization of IDEA. The issue of Cued Speech is discussed as a communication modality and implications for deaf education are presented.

La descolonización y el giro des-colonial (Tema Central)

El tema de la descolonización está volviendo a tomar una posición de suma importancia en procesos políticos hoy. Además de proveer algunas indicaciones sobre los lugares en que tal discurso se ha vuelto relevante, este artículo también explora el significado profundo, y en particular, el epistémico y el teórico, del concepto de descolonización. En este punto se continúa la tarea ya emprendida por otros sobre la “descolonización del conocimiento” y temas relacionados. Se intentará, a partir de los conceptos de actitud y razón des-coloniales, establecer las bases para la comprensión del tema de forma amplia y con consecuencias claras para el trabajo político y teórico.

Vuelta de tuerca: insurgencia política y epistémica de los movimientos sociales en Bolivia (Tema Central)

El artículo tiene el propósito de reflexionar sobre el (re)surgimiento de la acción colectiva en forma de (nuevos) movimientos sociales en Bolivia, más allá de su posición contestaria a los modelos hegemónicos en boga. Estos movimientos no solo se convirtieron en sujetos políticos-ideológicos con capacidad de generar propuestas alternativas a los modelos hegemónicos, sino con la capacidad epistémica de cuestionar los supuestos básicos del orden hegemónico.

Las actuales insurgencias políticas-epistémicas en las Américas: giros a la izquierda, giros anti imperiales, giros de-coloniales (Tema Central)

Este artículo esboza, a grosso modo, un análisis de la coyuntura actual mundial, haciendo un sondeo general de las insurgencias político espistémicas más importantes en América Latina. El autor hace una serie de preguntas claves a las cuales se debe hacer referencia en la tarea colectiva de construir el giro decolonial como alternativa tanto epistémica como ético-política.

Institutional sustainability: at what price? UNDP and the new cost-sharing model in Brazil

By the turn of the twenty-first century, UNDP had embraced a new form of funding based on ‘cost-sharing’, with this source accounting for 51 per cent of the organisation’s total expenditure worldwide in 2000. Unlike the traditional donor - recipient relationship so common with development projects, the new cost-sharing modality has created a situation whereby UNDP local offices become ‘subcontractors’ and agencies of the recipient countries become ‘clients’. This paper explores this transition in the context of Brazil, focusing on how the new modality may have compromised UNDP’s ability to promote Sustainable Human Development, as established in its mandate. The great enthusiasm for this modality within the UN system and its potential application to other developing countries increase the importance of a systematic assessment of its impact and developmental consequences.

Transfer effects in implicit memory and consumer choice

Two experiments investigated transfer effects in implicit memory and consumer choice, using a preference judgement task. Experiment 1 examined whether it is possible to obtain priming for unfamiliar food labels. Additionally, it investigated whether the experience of seeing a brand name with a particular product type would benefit subsequent processing of the brand name when linked with a different product type. Experiment 2 examined whether changes in modality between study and test would affect priming for unfamiliar brand names. Both questions are theoretically important, as well as pertaining to practical concerns in the consumer choice literature. Experiment 1 demonstrated significant priming for unfamiliar food labels, and established that priming was unaffected by changing the product type with which the brand name was associated. In Experiment 2, priming on both auditory and visual versions of the preference judgement task was reduced by changes in modality. The results and implications are discussed in relation to consumer choice and current theories of implicit memory.

Implicit and explicit processes in a second-language learning task

Two experiments examined the learning of a set of Greek pronunciation rules through explicit and implicit modes of rule presentation. Experiment 1 compared the effectiveness of implicit and explicit modes of presentation in two modalities, visual and auditory. Subjects in the explicit or rule group were presented with the rule set, and those in the implicit or natural group were shown a set of Greek words, composed of letters from the rule set, linked to their pronunciations. Subjects learned the Greek words to criterion and were then given a series of tests which aimed to tap different types of knowledge. The results showed an advantage of explicit study of the rules. In addition, an interaction was found between mode of presentation and modality. Explicit instruction was more effective in the visual than in the auditory modality, whereas there was no modality effect for implicit instruction. Experiment 2 examined a possible reason for the advantage of the rule groups by comparing different combinations of explicit and implicit presentation in the study and learning phases. The results suggested that explicit presentation of the rules is only beneficial when it is followed by practice at applying them.

Anterior cingulate activity and level of cognitive conflict: explicit comparisons

The role of anterior cingulate cortex (ACC) in attention is a matter of debate. One hypothesis suggests that its role is to monitor response-level conflict, but explicit evidence is somewhat lacking. In this study, the activation of ACC was compared in (a) color and number standard Stroop tasks in which response preparation and interference shared modality (response-level conflict) and (b) color and number matching Stroop tasks in which response preparation and interference did not share modality (non-response-level conflict). In the congruent conditions, there was no effect of task type. In the interference conditions, anterior cingulate activity in the matching tasks was less than that in the standard tasks. These results support the hypothesis that ACC specifically mediates generalized modality-independent selection processes invoked by response competition.

Generic control interface for networked haptic virtual environments

As Virtual Reality pushes the boundaries of the human computer interface new ways of interaction are emerging. One such technology is the integration of haptic interfaces (force-feedback devices) into virtual environments. This modality offers an improved sense of immersion to that achieved when relying only on audio and visual modalities. The paper introduces some of the technical obstacles such as latency and network traffic that need to be overcome for maintaining a high degree of immersion during haptic tasks. The paper describes the advantages of integrating haptic feedback into systems, and presents some of the technical issues inherent in a networked haptic virtual environment. A generic control interface has been developed to seamlessly mesh with existing networked VR development libraries.

Action preparation helps and hinders perception of action.

Several theories of the mechanisms linking perception and action require that the links are bidirectional, but there is a lack of consensus on the effects that action has on perception. We investigated this by measuring visual event-related brain potentials to observed hand actions while participants prepared responses that were spatially compatible (e.g., both were on the left side of the body) or incompatible and action type compatible (e.g., both were finger taps) or incompatible, with observed actions. An early enhanced processing of spatially compatible stimuli was observed, which is likely due to spatial attention. This was followed by an attenuation of processing for both spatially and action type compatible stimuli, likely to be driven by efference copy signals that attenuate processing of predicted sensory consequences of actions. Attenuation was not response-modality specific; it was found for manual stimuli when participants prepared manual and vocal responses, in line with the hypothesis that action control is hierarchically organized. These results indicate that spatial attention and forward model prediction mechanisms have opposite, but temporally distinct, effects on perception. This hypothesis can explain the inconsistency of recent findings on action-perception links and thereby supports the view that sensorimotor links are bidirectional. Such effects of action on perception are likely to be crucial, not only for the control of our own actions but also in sociocultural interaction, allowing us to predict the reactions of others to our own actions.

Threshold-free object and ground point separation in LIDAR data

Light Detection And Ranging (LIDAR) is an important modality in terrain and land surveying for many environmental, engineering and civil applications. This paper presents the framework for a recently developed unsupervised classification algorithm called Skewness Balancing for object and ground point separation in airborne LIDAR data. The main advantages of the algorithm are threshold-freedom and independence from LIDAR data format and resolution, while preserving object and terrain details. The framework for Skewness Balancing has been built in this contribution with a prediction model in which unknown LIDAR tiles can be categorised as “hilly” or “moderate” terrains. Accuracy assessment of the model is carried out using cross-validation with an overall accuracy of 95%. An extension to the algorithm is developed to address the overclassification issue for hilly terrain. For moderate terrain, the results show that from the classified tiles detached objects (buildings and vegetation) and attached objects (bridges and motorway junctions) are separated from bare earth (ground, roads and yards) which makes Skewness Balancing ideal to be integrated into geographic information system (GIS) software packages.

Sociality and external validity in experimental economics

It is sometimes argued that experimental economists do not have to worry about external validity so long as the design sticks closely to a theoretical model. This position mistakes the model for the theory. As a result, applied economics designs often study phenomena distinct from their stated objects of inquiry. Because the implemented models are abstract, they may provide improbable analogues to their stated subject matter. This problem is exacerbated by the relational character of the social world, which also sets epistemic limits for the social science laboratory more generally.