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Free Open Access

Lock-free Parallel Access Collections

All new computers have multicore processors. To exploit this hardware parallelism for improved performance, the predominant approach today is multithreading using shared variables and locks. This approach has potential data races that can create a nondeterministic program. This paper presents a promising new approach to parallel programming that is both lock-free and deterministic. The standard...

redundant publication' or 'duplicate publication' in the biomedical literature

Temporal Constraints in Planning: Free or not Free ?

relating those decisional variables, thus making it possible to apply classical constraints propagation used in planning. Those meta-structures exist together with the classical time-points graph structures that are necessary at execution time, as we need to hold all the events (beginning and ending of tasks, instantaneous events). Lastly, it is important to notice that the different CSP struct...

Free Internet access: When is it suitable?

Since 1998 a lots of European Internet Service Providers (ISP) started to provide internet access freely. Why does a profit maximizing operator adopts this pricing policy? A consumer who wants to surf on the net needs to buy two services: the access from the ISP and the connection from the Telephone Operator. Since the two services are complements, the price of one service creates a negative ex...