This paper discusses the role of agents in a distributed multimedia information system (DMIS) engineered according to the principles of open hypermedia. It is based on the new generation of Microcosm, an open hypermedia system developed by the Multimedia Research Group at the University of Southampton. Microcosm provides a framework for supporting the three major roles of agents within open inf...

Abbott (1966) described microcosms as miniaturized ecosystems. Among the oldest and most specialized examples of the microcosm technique were bioassay systems, such as that found in the standard BOD determination. Abbott also noted that, due to the unpredictability and complexity of natural systems, in situ experiment results were often vague and inconclusive, and many researchers had successfu...

This paper describes the design and implementation of Microcosm, an open hypermedia system. It examines the limitations of the initial prototype and describes the redesign that resulted in Microcosm version 2.0,.as well as details of its implementation. The new model has a greatly enhanced filter mechanism for handling the back-end processes of the system, such as link database access. The filt...

kerosene is the colorless liquid and slightly heavier than gasoline thatspecific odor removes after evaporation. soil and underground water source arecontaminated with different pollutants such as petroleum hydrocarbons. these pollutantshave various negative environmental effects on soil and surrounding environment. theaim of this research is to understand the effect of kerosene pollution on tw...

This report describes the Microcosm model and philosophy, and explains the advantages of taking an open, resource-based approach to the development and delivery of learning materials over traditional Computer Assisted Learning (CAL) practices. We describe early experiences in creating materials for the Microcosm environment, paying special attention to the features of the system which make auth...

1. Outdoor microcosms and mesocosms are useful in risk assessment when lower-tier and higher-tier laboratory studies (single-species and multi-species) indicate potential risks. They can be an important tool in bridging the gap between these studies and in attempting to understand and predict what may occur in the natural environment subjected to these risks. Every microcosm or mesocosm study s...

The microcosm principle, advocated by Baez and Dolan and formalized for Lawvere theories lately by three of the authors, has been applied to coalgebras in order to describe compositional behavior systematically. Here we further illustrate the usefulness of the approach by extending it to a many-sorted setting. Then we can show that the coalgebraic component calculi of Barbosa are examples, with...