Claudio Gottschalg Duque

Automated text clustering of newspaper and scientific texts in brazilian portuguese: analysis and comparison of methods

This article reports the findings of an empirical study about Automated Text Clustering applied to scientific articles and newspaper texts in Brazilian Portuguese, the objective was to find the most effective computational method able to cluster the input of texts in their original groups. The study covered four experiments, each experiment had four procedures: 1. Corpus Selections (a set of texts is selected for clustering), 2. Word Class Selections (Nouns, Verbs and Adjectives are chosen from each text by using specific algorithms), 3. Filtering Algorithms (a set of terms is selected from the results of the preview stage, a semantic weight is also inserted for each term and an index is generated for each text), 4. Clustering Algorithms (the clustering algorithms Simple K-Means, sIB and EM are applied to the indexes). After those procedures, clustering correctness and clustering time statistical results were collected. The sIB clustering algorithm is the best choice for both scientific and newspaper corpus, under the condition that the sIB clustering algorithm asks for the number of clusters as input before running (for the newspaper corpus, 68.9% correctness in 1 minute and for the scientific corpus, 77.8% correctness in 1 minute). The EM clustering algorithm additionally guesses the number of clusters without user intervention, but its best case is less than 53% correctness. Considering the experiments carried out, the results of human text classification and automated clustering are distant; it was also observed that the clustering correctness results vary according to the number of input texts and their topics.

Arquitetura multimodal da geoinformação no processo de comunicação cartográfica

A busca pela relevância e uma caracteristica basica da cognicao humana. Considerando que o intervalo entre a construcao e o uso dos mapas e um processo comunicacional, profissionais das geociencias podem explorar a condicao da busca pela relevância para aperfeicoar o atendimento das necessidades de diversos usuarios de mapas. Este artigo fundamenta-se em debater em que medida a Teoria da Relevância e a abordagem da Multimodalidade podem contribuir para a ampliacao do uso dos mapas, partindo do principio do menor esforco e do discurso multimodal no processo comunicacional. O objetivo foi ampliar as formas de representacao dos fenomenos geograficos modelados para o ambiente computacional para que os mapas atendam necessidades relevantes e, portanto, sejam mais uteis. Para alcancar este objetivo, o artigo apresenta um experimento utilizando elementos da geoinformacao, da Teoria da Relevância e da Multimodalidade. Nas consideracoes finais, apresenta possibilidades de estudos futuros.

Multimodality by electronic games as assistive technology for visual disabilities

With increasingly attention to the digital gaming industry in entertainment, games have become more graphical, solidifying the visual modality. In this reality, visually impaired people have little participation in the market and lose all the culture involved in this industry. Across the planet 246 million people have low vision and 39 million are blind. In Brazil there are 6 million people with low vision and 582,000 blind, almost all excluded from digital gaming. Analyzing gaming market for the blind and the adaptations of titles seeking their inclusion, this research aims to propose from the perspective of Information Science, the initial studies in order to help accessibility studies for the visually impaired using electronic games, treated as Assistive Technology with concepts of Multimodality. It intends to be a new approach for a theoretical work by analyzing accessibility guidelines for visually impaired people, which can serve as steps for interpreting these public demands in digital games development, aimed at the greater inclusion of them. This is still a theoretical work with a suggestion that there is a market for games developed for the visually impaired. Its conclusion is there is a lack of concern by developers to deploy best items in this area and there is a lack of opportunity by Brazilian government to promote such research and development. Researches made by organizations were observed and used as a basis for checking possibility of a better inclusion of the visually impaired.

Convergencia brasileña con los estándares internacionales de contabilidad pública vis-à-vis las estrategias top-down y bottom-up

Brasil pasa por un proceso de convergencia de su contabilidad publica con relacion a los estandares internacionales desarrollados por la Federacion Internacional de Contadores (Ifac). La implementacion de sistemas de informacion contable es realizada generalmente por medio de los abordajes top-down o bottom-up. Asi, este estudio tiene como objetivos: 1) identificar el abordaje adoptado por el gobierno federal brasileno; 2) describir el modelo de implementacion del sistema de informacion contable publica en Brasil; y 3) mapear el flujo de informaciones y los actores involucrados en el proceso de convergencia. El abordaje cualitativo fue adoptado utilizando la investigacion documental y el analisis de contenido de documentos disponibles para poner en operacion la investigacion. Se identifico que Brasil utiliza el abordaje middle-up-down, que favorece la interaccion entre multiples actores en el proceso, diferentemente del abordaje top-down, que sigue el modelo internacional divulgado.

Brazilian convergence with the international standards of public accounting vis-à-vis the top-down and bottom-up strategies

Brasil pasa por un proceso de convergencia de su contabilidad publica con relacion a los estandares internacionales desarrollados por la Federacion Internacional de Contadores (Ifac). La implementacion de sistemas de informacion contable es realizada generalmente por medio de los abordajes top-down o bottom-up. Asi, este estudio tiene como objetivos: 1) identificar el abordaje adoptado por el gobierno federal brasileno; 2) describir el modelo de implementacion del sistema de informacion contable publica en Brasil; y 3) mapear el flujo de informaciones y los actores involucrados en el proceso de convergencia. El abordaje cualitativo fue adoptado utilizando la investigacion documental y el analisis de contenido de documentos disponibles para poner en operacion la investigacion. Se identifico que Brasil utiliza el abordaje middle-up-down, que favorece la interaccion entre multiples actores en el proceso, diferentemente del abordaje top-down, que sigue el modelo internacional divulgado.

Convergência brasileira aos padrões internacionais de contabilidade pública vis-à-vis as estratégias top-dow e bottom-up

Brasil pasa por un proceso de convergencia de su contabilidad publica con relacion a los estandares internacionales desarrollados por la Federacion Internacional de Contadores (Ifac). La implementacion de sistemas de informacion contable es realizada generalmente por medio de los abordajes top-down o bottom-up. Asi, este estudio tiene como objetivos: 1) identificar el abordaje adoptado por el gobierno federal brasileno; 2) describir el modelo de implementacion del sistema de informacion contable publica en Brasil; y 3) mapear el flujo de informaciones y los actores involucrados en el proceso de convergencia. El abordaje cualitativo fue adoptado utilizando la investigacion documental y el analisis de contenido de documentos disponibles para poner en operacion la investigacion. Se identifico que Brasil utiliza el abordaje middle-up-down, que favorece la interaccion entre multiples actores en el proceso, diferentemente del abordaje top-down, que sigue el modelo internacional divulgado.