A dynamical (time-dependent) evolutionary population model featuring two levels of organization (individuals and groups) is studied. The dynamical model is represented by a partial differential equation (PDE) that governs the state of the environment as it evolves in time. The PDE is derived from an underlying stochastic model of two-level selection based on evolutionary birth-death processes. ...

As computers become faster they must become smaller because of the niteness of the speed of light. The history of computer technology has involved a sequence of changes from one type of physical realisation to another-from gears to relays to valves to transistors to integrated circuits and so on. Quantum mechanics is already important in the design of microelectronic components. Soon it will be...

In this paper, a process model for digital investigations is defined using the theories and techniques from the physical investigation world. While digital investigations have recently become more common, physical investigations have existed for thousands of years and the experience from them can be applied to the digital world. This paper introduces the notion of a digital crime scene with its...

Power is widely considered the only real limiter for Moore’s Law in the next decade [Gelsinger, 2004]. Indeed, IBM CTO B. Meyerson has claimed that CMOS process scaling has already stopped between 130nm and 90nm due to power limitations [Clarke, 2004]. Existing methods for physical synthesis, however, have primarily targeted timing closure and are inadequate to meet the challenge of low-power p...

Electrical recording from small twigs of nerve in a tortoise showed that olfactory, vomeronasal, and trigeminal receptors in the nose are responsive to various odorants. No one kind of receptor was most sensitive to all odorants. For controlled stimulation, odorant was caused to appear in a stream of gas already flowing through the nose. Of the parameters definable at the naris, temperature, re...

The increasing application of process-oriented approaches in new challenging cyber-physical domains beyond business computing (e.g., personalized healthcare, emergency management, factories of the future, home automation, etc.) has led to reconsider the level of flexibility and support required to manage complex processes in such domains. A cyber-physical domain is characterized by the presence...