We present the approach of deploying cooperating agents to detect failures as well as recover services in a mobile agent system. In additional to server failure detection, we use cooperating agents to handle agent failure detection. Two types of agents are involved. One is the agent performing the computation delegated by the owner, which we call the actual agent. Another is the agent that moni...

The number of web-based activities and websites is growing every day. Unfortunately, so is cyber-crime. Every day, new vulnerabilities are reported and the number of automated attacks is constantly rising. Typical signature-based methods rely on expert knowledge and the distribution of updated information to the clients (e.g. anti-virus software) and require more effort to keep the systems up t...

M ultiprocessors, especially those constructed of relatively low-cost microprocessors, offer a cost-effective solution to the continually increasing need for computing power and speed. These systems can be designed either to maximize the throughput of many jobs or to speed up the execution of a single job; they are respectively called throughput-oriented and speeduporiented multiprocessors. In ...

This paper describes an architecture for modeling cooperating systems of communicating agents. The authors’ goal is not that of providing a framework to implement multi-agents systems (there are tools—such as CORBA, Java and DCOM—that do an excellent job on that), but rather to provide an architectural metaphor upon which collaborative multi-agent systems could be modeled. The approach is based...

Optimality theoretic (OT) syntax (Dekkers et al. 2000, Legendre et al. 2000, Sells 2001) is an important development in the world of constraint based grammar, because it introduces a new way of looking at constraint interactions. The leading idea is that not all constraints are “surface true” – constraints may be violated when they have to be in order to satisfy some more important, higher rank...

The paper informs about innovation cooperation in East Germany. Besides a description of the cooperation behavior in general, it focuses on the question whether cooperating enterprises are more innovative and thus more productive than non-cooperating firms. A comparison between East and West German firms is being made. It can be shown that there are no deficiencies in cooperation frequency or c...

Using a set of heterogeneous competing systems with intra-system cooperation and inter-system unfair competition, we show how the coevolution of the system parameters (degree of cooperation and unfair competition) depends on the external supply of resources. This kind of interaction is found in social, economic, ecological and biochemical systems; as an illustration we consider the competition ...