Fuzzy rule-based system for evaluation of uncertainty transaction in cassava chain

A fuzzy ruled-based system was developed in this study and resulted in an index indicating the level of uncertainty related to commercial transactions between cassava growers and their dealers. The fuzzy system was developed based on Transaction Cost Economics approach. The fuzzy system was developed from input variables regarding information sharing between grower and dealer on ���Demand/purchase Forecasting���, ���Production Forecasting��� and ���Production Innovation���. The output variable is the level of uncertainty regarding the transaction between seller and buyer agent, which may serve as a system for detecting inefficiencies. Evidences from 27 cassava growers registered in the Regional Development Offices of Tupa and Assis, S��o Paulo, Brazil, and 48 of their dealers supported the development of the system. The mathematical model indicated that 55% of the growers present a Very High level of uncertainty, 33% present Medium or High. The others present Low or Very Low level of uncertainty. From the model, simulations of external interferences can be implemented in order to improve the degree of uncertainty and, thus, lower transaction costs.

Desempenho ortogr��fico de escolares do 2�� ao 5�� ano do ensino particular

Funda����o de Amparo �� Pesquisa do Estado de S��o Paulo (FAPESP)

Mapping Macrophyte Species in the Amazon Floodplain Wetlands Using Fully Polarimetric ALOS/PALSAR Data

The purpose of this paper was to evaluate attributes derived from fully polarimetric PALSAR data to discriminate and map macrophyte species in the Amazon floodplain wetlands. Fieldwork was carried out almost simultaneously to the radar acquisition, and macrophyte biomass and morphological variables were measured in the field. Attributes were calculated from the covariance matrix [C] derived from the single-look complex data. Image attributes and macrophyte variables were compared and analyzed to investigate the sensitivity of the attributes for discriminating among species. Based on these analyses, a rule-based classification was applied to map macrophyte species. Other classification approaches were tested and compared to the rule-based method: a classification based on the Freeman-Durden and Cloude-Pottier decomposition models, a hybrid classification (Wishart classifier with the input classes based on the H/a plane), and a statistical-based classification (supervised classification using Wishart distance measures). The findings show that attributes derived from fully polarimetric L-band data have good potential for discriminating herbaceous plant species based on morphology and that estimation of plant biomass and productivity could be improved by using these polarimetric attributes.

Reducing the gap between mobile and intelligent software agents

This paper presents an approach to integrate an artificial intelligence (AI) technique, concretely rule-based processing, into mobile agents. In particular, it focuses on the aspects of designing and implementing an appropriate inference engine of small size to reduce migration costs. The main goal is combine two lines of agent research, First, the engineering oriented approach on mobile agent architectures, and, second, the AI related approach on inference engines driven by rules expressed in a restricted subset of first-order predicate logic (FOPL). In addition to size reduction, the main functions of this type of engine were isolated, generalized and implemented as dynamic components, making possible not only their migration with the agent, but also their dynamic migration and loading on demand. A set of classes for representing and exchanging knowledge between rule-based systems was also proposed.

A utiliza����o de linguagem VRML na educa����o �� dist��ncia em arte

P��s-gradua����o em Artes - IA

Novos caminhos para o ensino e aprendizagem de matem��tica financeira: constru����o e aplica����o de webquest

Coordena����o de Aperfei��oamento de Pessoal de N��vel Superior (CAPES)

O uso de tarefas comunicativas e pr��-comunicativas no ensino de l��ngua inglesa em uma faculdade particular

P��s-gradua����o em Estudos Lingu��sticos - IBILCE

Informa����o polarim��trica PALSAR/ALOS aplicada �� discrimina����o de esp��cies e estima����o de par��metros morfol��gicos de macr��fitas

Coordena����o de Aperfei��oamento de Pessoal de N��vel Superior (CAPES)

Constru����o e an��lise da rede integrada de intera����es entre genes humanos envolvida com a regula����o da trnsi����o G1/S do ciclo celular plea ades��o �� matriz extracelular

Coordena����o de Aperfei��oamento de Pessoal de N��vel Superior (CAPES)

Corrida de orienta����o: uma proposta metodol��gica para o ensino da Geografia e da Cartografia

P��s-gradua����o em Geografia - IGCE

Entre a teoria e a pr��tica: o projeto pol��tico-pedag��gico do curso de medicina da UFMA

Coordena����o de Aperfei��oamento de Pessoal de N��vel Superior (CAPES)

Energia, meio ambiente e sustentabilidade: proposta de um modelo educacional para o ensino b��sico

Coordena����o de Aperfei��oamento de Pessoal de N��vel Superior (CAPES)

Practising Arithmetic Using Educational Video Games with an Interpersonal Computer

Studies show the positive effects that video games can have on student performance and attitude towards learning. In the past few years, strategies have been generated to optimize the use of technological resources with the aim of facilitating widespread adoption of technology in the classroom. Given its low acquisition and maintenance costs, the interpersonal computer allows individual interaction and simultaneous learning with large groups of students. The purpose of this work was to compare arithmetical knowledge acquired by third-grade students through the use of game-based activities and non-game-based activities using an interpersonal computer, with knowledge acquired through the use of traditional paper-and-pencil activities, and to analyze their impact in various socio-cultural contexts. To do this, a quasi-experimental study was conducted with 271 students in three different countries (Brazil, Chile, and Costa Rica), in both rural and urban schools. A set of educational games for practising arithmetic was developed and tested in six schools within these three countries. Results show that there were no significant differences (ANCOVA) in the learning acquired from game-based vs. non-game-based activities. However, both showed a significant difference when compared with the traditional method. Additionally, both groups using the interpersonal computer showed higher levels of student interest than the traditional method group, and these technological methods were seen to be especially effective in increasing learning among weaker students.

Abordagem textual no ensino de latim

The study of Latin is essentially focused on the receptive writing skills acquisition. For this reason, the teaching of this ancient language should have the readers��� training as its main objective. ! e e" ective understanding of ancient texts depends on a learning process that is based on three competence levels: the language level, the textual level and the intertextual level. As part of this teaching methodology, which seeks to narrow the cultural gap between the ancient and the contemporary world, avoiding anachronistic interpretation of Latin texts, this paper presents strategies that allow students to learn grammar from authentic texts.

Um ambiente computacional para emular em rede aplica����es interativas desenvolvidas para televis��o digital

P��s-gradua����o em Televis��o Digital: Informa����o e Conhecimento - FAAC