Obstáculos superados pelos matemáticos no passado e vivenciados pelos alunos na atualidade : a polêmica multiplicação de números inteiros

In Mathematics literature some records highlight the difficulties encountered in the teaching-learning process of integers. In the past, and for a long time, many mathematicians have experienced and overcome such difficulties, which become epistemological obstacles imposed on the students and teachers nowadays. The present work comprises the results of a research conducted in the city of Natal, Brazil, in the first half of 2010, at a state school and at a federal university. It involved a total of 45 students: 20 middle high, 9 high school and 16 university students. The central aim of this study was to identify, on the one hand, which approach used for the justification of the multiplication between integers is better understood by the students and, on the other hand, the elements present in the justifications which contribute to surmount the epistemological obstacles in the processes of teaching and learning of integers. To that end, we tried to detect to which extent the epistemological obstacles faced by the students in the learning of integers get closer to the difficulties experienced by mathematicians throughout human history. Given the nature of our object of study, we have based the theoretical foundation of our research on works related to the daily life of Mathematics teaching, as well as on theorists who analyze the process of knowledge building. We conceived two research tools with the purpose of apprehending the following information about our subjects: school life; the diagnosis on the knowledge of integers and their operations, particularly the multiplication of two negative integers; the understanding of four different justifications, as elaborated by mathematicians, for the rule of signs in multiplication. Regarding the types of approach used to explain the rule of signs arithmetic, geometric, algebraic and axiomatic , we have identified in the fieldwork that, when multiplying two negative numbers, the students could better understand the arithmetic approach. Our findings indicate that the approach of the rule of signs which is considered by the majority of students to be the easiest one can be used to help understand the notion of unification of the number line, an obstacle widely known nowadays in the process of teaching-learning

Refletindo dificuldades de aprendizagem de alunos do ensino médio no estudo do equilíbrio químico

This research intends to identify the main conceptual mistakes committed by High School students when studying Chemical Equilibrium and also how the didactic books can influence in their formation. For the data - collecting we applied 150 questionnaires with 11 open questions e 4 restricted ones. Students from three different private schools in Natal-RN were used in this survey. The questionary about the book analysis tried to understand how the subject has been boarded, making it easier or not for the knowledge building. The books were chosen by being usually the most used ones at the chemistry classes in the schools in town. On the didactic book analysis we evaluated 12 items that tried to identify the clarity with which the books would bring up the subjects, the contextualization of the exercises, the analogies used, the amount and the quality of exercises, the connections between the subjects, and the retaken of important concepts. The questionary given to the students tried to get their knowledge about the concepts related to Chemical Equilibrium. The main mistakes found were: the definition of the state of equilibrium in a chemical reaction, the constant, the double headed arrow, confusions between mass and concentration, the representation of a microscopic reaction in equilibrium, partial pressure and total pressure, and the function of the catalyser. The results demonstrated a lot of insecurity or lack of knowledge about the subject when it was realized that there was a big number of blank questions and a considerable percentage of questions with conceptual errors. We concluded that those errors could be eased or even avoided if the didactic books and the teachers boarded the contents in a more conceptual form with the application of a largest number of good quality exercices, watching the building of definitions by the students, avoiding this way the formation of wrong concepts

Relações conceituais como ponto de inflexão entre linguagens documentais, terminologia e ontologias

A reflection is offered on the complementary relations among documentary languages, terminology, and ontologies, in regard to the study of conceptual relations used to organize knowledge. Building on selected texts from the international literature, the relations between documentary languages and different emerging technology solutions are analyzed, taking SKOS as a model; and also the relations among thesauri, ontologies and terminology, with the support of the theoretical concept of documentary representation. The adoption of the principles of terminology, as understood in Information Science, in building ontologies is supported; and the innovative opportunities offered by ontologies to the improvement and processing of conceptual relations in indexing languages is defended.

TV digital e convergência de mídias: estudo exploratório sobre narrativas interativas

Pós-graduação em Televisão Digital: Informação e Conhecimento - FAAC

Formação de professores: o computador como recurso para o processo de alfabetização

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

A dialogicidade freireana na educação de jovens e adultos

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

A competência em informação como fator crítico de sucesso para a pesquisa na área de ciência da informação: transferência de princípios para reflexão

This study is to provide parameters from theoretical and exploratory research in the creation and institutionalization of information science to establish a link with Information Literacy. Approaches are presented in which contributions allow us to understand the relationships and kinds of science in general and their applicability to the population studied, since these theories have a big relationship with the deepening of the area and their social, cultural and economic relationships. We hope to contribute with selective reference to assist the understanding of the issues arising from information science and the knowledge generated by its researchers. This requires developing new skills of access and use of information, providing an interaction between information literacy and knowledge building in Information Science.

Indicadores de bibliotecas universitárias: criação de índice de desenvolvimento baseado em redes de conhecimento compartilhado

Pós-graduação em Ciência da Informação - FFC

Programação no ensino de matemática utilizando Processing 2: Um estudo das relações formalizadas por alunos do ensino fundamental com baixo rendimento em matemática

Pós-graduação em Educação para a Ciência - FC

Orientações pedagógicas no estágio supervisionado de educação física na Colômbia, Brasil, Argentina e Chile

Pós-graduação em Ciências da Motricidade - IBRC

Orientações pedagógicas no estágio supervisionado de educação física na Colômbia, Brasil, Argentina e Chile

Pós-graduação em Ciências da Motricidade - IBRC

International social work education at the crossroads

Social work has been a player in the international arena since 1928 when the International Association of Schools of Social Work (IASSW) was founded alongside its sister organisations, the International Federation of Social Workers (IFSW) and the International Council for Social Welfare (ICSW). These divided their remit into education, practice and policy respectively. Their development has been an interesting one, but the details of it need not detain us here. I only want to lay aside the argument that having an interest in the international domain is a new phenomenon in social work. At the same time, I want to emphasise how impressive it is that a profession that has been so tied into modernity, linked to the modern nation-state (Lorenz, 1994) and rooted in local legislation and traditions has such a long-standing history of involvements that have crossed borders to promote understanding and knowledge-building. In these encounters, social work educators and practitioners have engaged with others who were different from them while struggling to make their interactions egalitarian and respectful ones.

International cooperation in ambient computing education

Funded by the US-EU Atlantis Program, the International Cooperation in Ambient Computing Education Project is establishing an international knowledge-building community for developing a broader computer science curriculum aimed at preparing students for real-world problems in a multidisciplinary, global world. The project is collaboration among Troy University (USA), University of Sunderland (UK), FernUniversität in Hagen (Germany), Universidade do Algarve (Portugal), University of Arkansas at Little Rock (USA) and San Diego State University (USA). The curriculum will include aspects of social science, cognitive science, human-computer interaction, organizational studies, global studies, and particular application areas as well as core computer science subjects. Programs offered at partner institutions will form trajectories through the curriculum. A degree will be defined in terms of combinations of trajectories which will satisfy degree requirements set by accreditation organizations. This is expected to lead to joint- or dual-degree programs among the partner institutions in the future. This paper describes the goals and activities of the project and discusses implementation issues.

The Virtual Skeleton Database: An Open Access Repository for Biomedical Research and Collaboration

Background: Statistical shape models are widely used in biomedical research. They are routinely implemented for automatic image segmentation or object identification in medical images. In these fields, however, the acquisition of the large training datasets, required to develop these models, is usually a time-consuming process. Even after this effort, the collections of datasets are often lost or mishandled resulting in replication of work. Objective: To solve these problems, the Virtual Skeleton Database (VSD) is proposed as a centralized storage system where the data necessary to build statistical shape models can be stored and shared. Methods: The VSD provides an online repository system tailored to the needs of the medical research community. The processing of the most common image file types, a statistical shape model framework, and an ontology-based search provide the generic tools to store, exchange, and retrieve digital medical datasets. The hosted data are accessible to the community, and collaborative research catalyzes their productivity. Results: To illustrate the need for an online repository for medical research, three exemplary projects of the VSD are presented: (1) an international collaboration to achieve improvement in cochlear surgery and implant optimization, (2) a population-based analysis of femoral fracture risk between genders, and (3) an online application developed for the evaluation and comparison of the segmentation of brain tumors. Conclusions: The VSD is a novel system for scientific collaboration for the medical image community with a data-centric concept and semantically driven search option for anatomical structures. The repository has been proven to be a useful tool for collaborative model building, as a resource for biomechanical population studies, or to enhance segmentation algorithms.

Desarrollos y tejidos actuales en el campo de la tecnología educativa : Caleidoscopio en movimiento

El artículo propone algunas construcciones analíticas que articulan perspectivas actuales y que ofrecen pistas para repensar la enseñanza y el aprendizaje cuando hay mediación tecnológica. A partir de un breve recorrido por el campo de la Tecnología Educativa desde sus orígenes a la actualidad, se centra en tres "tejidos" (en tanto articuladores de ideas). El primero da cuenta de una perspectiva cognitiva y refiere a la mente participativa como constructo que ofrece un prisma para comprender la cognición en tiempos de redes sociales; el segundo, centrado en la enseñanza recupera la idea de la reconstrucción del aprendizaje experiencial; el último aborda la tendencia en las formas de producción. Estas tres tendencias conforman un "caleidoscopio" que ofrece una desmitificación de la relación entre tecnología e innovación y entre tecnología y motivación y una perspectiva más compleja para generar cambio educativo.