An Introduction to MultiAgent Systems.

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Cognitive Therapy: Basics and Beyond

Multiagent Systems is the title of a collection of papers dedicated to surveying specific themes of Multiagent Systems (MAS) and Distributed Artificial Intelligence (DAI). All of them authored by leading researchers of this dynamic multidisciplinary field.

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Multiagent systems: a modern approach to distributed artificial intelligence

The mobile and ubiquitous computing has been stimulated by the widespread diffusion of mobile devices, wireless networks, and, more recently, by location systems. In this context, applications are emerging in different areas, such as, education, entertainment, and commerce. The application of the ubiquitous computing in the exploration of business opportunities is called Ubiquitous Commerce. This paper proposes the UbiTrade model, which aims at supporting the ubiquitous commerce. Considering the related works, we can note that the proposed model is the only that allows the user to act either in the supplier role or in the consumer character. In addition, most of the current proposals are restricted to a specific area of business. The UbiTrade does not have this restriction. The model was implemented and its validation was conducted by a group of users. The results indicated the model feasibility, particularly in regard to its most significant contribution, that is, the integration of the support to the roles of supplier and consumer.

A Model to Explore Business Opportunities in Ubiquitous Environments

A tarefa de desenvolver aplicacoes ubiquas nos modelos tradicionais de programacao torna-se um desafio pois a maioria desses modelos baseia-se em premissas estaticas de arquitetura, dados, aplicacao e sistemas operacionais. Por isso o presente trabalho propoe o \textit{Ubiquitous Oriented Programming} (abreviadamente UOP), um modelo de programacao orientado ao desenvolvimento de sistemas ubiquos. O UOP utiliza os conceitos de servicos e da programacao orientada a objetos, integrando-os com requisitos necessarios em aplicacoes ubiquas como compartilhamento de informacoes contextuais, sensibilidade ao contexto, adaptacao ao contexto, mobilidade de codigo e concorrencia. O ambiente do UOP e composto por uma linguagem de programacao (UbiL), um compilador (UbiC) e por uma maquina virtual (UbiVM) que suporta a execucao das aplicacoes desenvolvidas em UbiL. O modelo foi avaliado de forma experimental, onde uma aplicacao foi criada e entao simulada atraves de um cenario de comercio ubiquo. Atraves desse experimento concluiu-se que o UOP facilitou o desenvolvimento dessa aplicacao.

/pdf/um-modelo-de-programacao-orientado-ao-desenvolvimento-de-4we5lwrbkh.pdf

Um modelo de programação orientado ao desenvolvimento de sistemas ubíquos

A research topic of growing interest is the convergence between Collaborative Systems and Ubiquitous Computing, where context awareness is becoming a tool for enhancing collaboration processes. The application of Ubiquitous Computing concepts in the improvement of collaboration strategies created a research front called Ubiquitous Collaboration. This article proposes a framework to aid the development of collaborative applications for ubiquitous environments, called MaPS. MaPS works at one relevant stage of the collaboration. It uses context information and user profiles to improve the search for peers and the selection of communication channels. The article proposes the framework, its requirements and its architecture. Moreover, we describe a prototype and two applications which were developed with it. The framework was evaluated considering software development, based on the experience got in the implementation of the applications and aspects of functionalities. It was made through a scenario involving active participants. The results of both evaluations show the potential for using MaPS. Keywords: collaboration, collaborative applications, ubiquitous computing, ubiquitous collaboration, ubiquitous environments, context awareness.

MaPS: A framework to aid the development of collaborative applications for ubiquitous environments

With the changes in technologies and the rapid consumption of natural resources by humans, it is vital to implement smart irrigation techniques to overcome the scarcity of water resources shortly. The amount of fresh water existing on the planet, the use for irrigation corresponds to about 70% of all water consumed in the world, Inadequate water management creates a number of problems, such as lower productivity, lower quality fruits, environmental damage, soil erosion and reduced soil air, which has been motivating the evaluation of alternatives for water supply agricultural crops. One solution that can be exploited is IoT, helping to achieve optimum water-resource utilization. Considering this scenario, this article presents the EXEHDA-SF proposal, which aims to explore IoT solutions and Context Awareness in the decision-making process, with the perspective of minimizing socioenvironmental impacts. For the evaluation of EXEHDA-SF, as an irrigation alternative, without the use of physical sensors, a prototype was developed that integrates open source IoT technologies with the EXEHDA middleware and explores a meteorological forecasting service. The results achieved were considered promising, reaching a success rate of approximately 94% regarding the irrigation decision.

An IoT Proposal for the Irrigation Management Exploring Context Awareness

Agrochemicals are products that, due to their hazardous nature and high cost, need to be monitored. The management of agrochemical packaging is generally precarious, and the supply chain needs more control due to its reverse characteristic. Traceability in the supply chain usually uses one sensor and not a combination of multiple sensors. The proposed model allows one to trace agrochemicals with reliable and immutable information coming from various sensors, solving problems of unreliable traceability, product theft, and product tampering. Unlike related work, this model contributes with a proposal segmented in modules that focus on security and scalability in controlling used packaging. In this case, the proofs of concept indicate detection of the opening movement of the safe cabinet from 5 lux (unit of illuminance) and movement of packages after a radius of 2 cm, and the data sending time between the model layers was around 1 second. The positive aspects are benefits for detecting intact products and packages openly within the production process and persistently; other benefits include better use of assets and management of the production chain, real-time production data collection, classification, grouping, and prediction of events. Monitoring the packaging reverse chain and the possibility of transaction auditing. Benefits include better use of assets and management of the production chain, real-time production data collection, classification, grouping, and prediction of events generated by the production operation, and persistence of this information for future transactions and audits. Farmers and society benefit from making production and supply chains cleaner and safer and reducing the risk of costly and environmental accidents. This article is protected by copyright. All rights reserved. 

Jorge Luis Victória Barbosa

Papers

A Model to Explore Business Opportunities in Ubiquitous Environments

Um modelo de programação orientado ao desenvolvimento de sistemas ubíquos

MaPS: A framework to aid the development of collaborative applications for ubiquitous environments

An IoT Proposal for the Irrigation Management Exploring Context Awareness

On Proposing an Intelligent Model for Tracking Agrochemicals