A growing body of literature suggests that there is an optimal size for software components. This means that components that are too small or too big will have a higher defect content (i.e., there is a U-shaped curve relating defect content to size). The U-shaped curve has become known as the “Goldilocks Conjecture”. Recently, a cognitive theory has been proposed to explain this phenomenon, and...

Modularity has been recognised as a problematic issue of programming language semantics, and various semantic frameworks have been designed with it in mind. Reusability is another desirable feature which, although not the same as modularity, can be enabled by it. The K Framework, based on Rewriting Logic, has good modularity support, but reuse of speci cations is not as well developed. The PLan...

Despite the rapid emergence of Internet-based electronic transactions, many users are still unfamiliar with the system and find it difficulty buying and selling products in the cyber marketplace. The agent-based virtual marketplace system, where agents take care of the transactions for individual users, has been suggested to solve this problem. Many of the models proposed for the system can be ...

C-evo is a non-commercial free open-source game based on “Civilization”, one of the most popular turn-based strategy games. One of the most important goals in the development of C-evo is to support the creation of Artificial Intelligence (AI) modules. We have developed one of such AI modules based on Case Based Reasoning (CBR). The project is in an early stage. In this paper we describe the mai...

We study peer effects among workers in the same occupation across firms in the context of security analysts (i.e., we study whether the productivity of a worker is a function of her peers in other firms). We use microdata concerning analysts as well as an identification strategy that employs one feature of social networks: the existence of partially overlapping peer group. The results show stro...

1. Motivation The SeSAm (Shell for Simulated Agent Systems) provides a generic environment for modeling and experimenting with agent-based systems. We specially focused on providing a framework for the easy construction of complex models. Although the idea of a domain-independent multi-agent simulation environment is not new, none of the existing environments fulfills the claim of usage without...

SUMMARY The Genetic Simulation Library (GSL) is a set of C++ programs and classes that can be used in individual-based simulation models of plant and animal populations. The classes in this library build representations of genes for a wide variety of different types of organisms, from asexually reproducing single-cell organisms to chromosome-structured sexually reproducing species. AVAILABILI...

This paper describes one speciic aspect of the software component construction in the life cycles of computer based systems. The construction is located following the requirements analysis, conception and design. Systems are designed as within the ECBS process so called services which consist of a set of objects working together, keeping the states of the system. To ensure an eecient and rapid ...

Most software component technologies fail to account for lightweight components (those for which a function call is too ineecient or semantically inappropriate) or generative components (those in which the component embodies a method of constructing code rather than actual code). Macro-based systems such as the C++ Standard Template Library are exceptions. They, however, have the disadvantage t...

Software component reuse is the key to significant gains in productivity. However, the major problem is the lack of identifying and developing potentially reusable components. This paper concentrates on our approach to the development of reusable software components. A prototype tool has been developed, known as the Reuse Assessor and Improver System (RAIS) which can interactively identify, ana...