86,619 research outputs found
JADE a FIPA2000 compliant agent development environment
No full textJADE (Java Agent Development Framework) is a software environment to build agent systems for the management of networked information resources in compliance with the FIPA2000 specifications for interoperable intelligent multi-agent systems. The goal of JADE is to simplify development while ensuring standard compliance through a comprehensive set of system services and agents. JADE offers an agent runtime system on which implement efficient FIPA 2000 compliant multi-agent systems and supports their development through the availability of a predefined programmable agent model and of a set of management and testing tools. This paper describes the main features of the JADE system and introduces some of the most important projects based on JADE software
A Pyramid Vector Quantizer Chip for HDTV Applications
No full textThe quantization process in bit-rate reduction for video coding has been taken into account. Because, at least in theory, vector quantization obtains better performance than scalar quantization, a pyramid vector quantizer has been analysed. Some figures of performance have been estimated by Monte Carlo simulation and, after analysing the problem of vector formation, directly on a typical video coding scheme. In the past, a single-chip dedicated processor for implementation of the PVQ was presented with the conclusion that the allowed quantization sample rate was no greater than 16 kHz. In this work ASIC-oriented modifications of the base algorithm are described and an ASIC design for the PVQ is presented. The architecture of the integrated circuit was obtained by means of the systolic macrocell approach. A system throughput greater than 70 MSa/s was allowed that extends the range of application of the PVQ up to HDTV digital video coding
Analysis of Audio Streaming Capability of Zigbee Networks
No full textAlthough formerly conceived for industrial sensing and control over Wireless Sensor Networks, LR-WPANs are registering an increasing interest in experimenting multimedia applications, with particular emphasis on evaluating the streaming capability of Zigbee networks. Due to their limited throughput they are not expected to provide high QoS, nevertheless there are several application scenarios such as distributed surveillance, emergency and rescue where audio and video streaming over low cost Zigbee networks is highly desirable. In this paper we first investigate the feasibility of Zigbee-like networks for low-rate voice streaming applications. We analyze important streaming metrics such as throughput, packet loss and jitter in multi-hop topologies. We propose some improvements in the stack implementation and show the performance in order to determine the streaming capacity limits of LR-WPAN networks
JADE: a Software Framework for Developing Multi-Agent Applications. Lessons Learned
No full textSince a number of years agent technology is considered one of the most innovative technologies for the development of distributed
software systems. While not yet a mainstream approach in software engineering at large, a lot of work on agent technology has been
done, many research results and applications have been presented, and some software products exists which have moved from the
research community to the industrial community. One of these is JADE, a software framework that facilitates development of interoperable
intelligent multi-agent systems and that is distributed under an Open Source License. JADE is a very mature product, used by a
heterogeneous community of users both in research activities and in industrial applications. This paper presents JADE and its technological
components together with a discussion of the possible reasons for its success and lessons learned from the somewhat detached
perspective possible nine years after its inception
Motion compensation and multi-resolution coding
No full textMultiresolution techniques have become more and more appealing in current image coding. Image multispectral representation produces many important features such as spectral shaping of coding noise according to human eye perception, good image energy compaction, coder tuning with respect to any band characteristics, and allows for multilevel layered transmission that is one of the main targets pursued by the broadcaster. Despite these appealing capabilities, multiresolution techniques have failed to give the expected results. One of the reasons for this failure is the difficulty of exploiting the temporal redudancy present in image sequences. This paper addresses the problem of motion compensation in a multiresolution environment, considering both QMF-SBC and wavelet transform approaches. Different motion compensation schemes are derived and their efficiency is considered with regard to scalability and to the lengths of subband analysis and synthesis filters. Simulation results are used to support relevant conclusions where needed
JADE - A Java Agent Development Framework
No full textJADE (Java Agent Development Framework) is a software environment to build agent systems for the management of networked information resources in compliance with the FIPA specifications for interoperable multi-agent systems. JADE provides a middleware for the development and execution of agent-based applications which can seamless work and interoperate both in wired and wireless environment. Moreover, JADE supports the development of multi-agent systems through the predefined programmable and extensible agent model and a set of management and testing tools. Currently, JADE is one of the most used and promising agent development framework; in fact, it has a large user group, involving more than two thousands active members, it has been used to realize real systems in different application sectors, and its future development is guided by a governing board involving some important industrial companies
- …
