Petri nets are studied as computing devices and links between some dynamical components and the computational power of Petri net are established. The combination of different dynamical components leads to an hierarchy of computational processes. Examples show how the obtained result facilitate the study of the computational power of abstract computational devices.

The wireless sensor networks consist of hundreds of inexpensive wireless nodes, each with some computational power and sensing capability, operational power and sensing capability, operating in an unattended mode. Clustering is an efficient approach to capitalize the energy of energy constraint sensor nodes in wireless sensor networks (WSNs). Low Energy Adaptive Clustering Hierarchy (LEACH) is ...

Figure 1: Distributions of the numbers of connections at varying distances are schematized in log-log coordinates. The straight line indicates power-law 1/f. Scale­free dynamics of neocortex are characterized by hierarchical self-similarities of patterns of synaptic connectivity and spatiotemporal neural activity, seen in power-law distributions of structural and functional parameters and in ra...

a number of individuals and organizations have considerable influence over the selection of global health priorities and strategies. for some that influence derives from control over financial resources. for others it comes from expertise and claims to moral authority—what can be termed, respectively, epistemic and normative power. in contrast to financial power, we commonly take for granted th...

this article agrees with recent arguments suggesting that normative and epistemic power is rife within global health policy and provides further examples of such. however, in doing so, it is argued that it is equally important to recognize that global health is, and always will be, deeply political and that some form of power is not only necessary for the system to advance, but also to try and ...

Power management is an important issue in the design of Energy Harvesting Wireless Sensor Networks (EHWSNs). In this kind of networks, each Energy Harvesting Node (EH-node) must dynamically adapt its performance in order to avoid power failures while maintaining a good quality of service. The power management policy is implemented on each node by a Power Manager (PM). In this demonstration, the...

Customers’ requirements in terms of availability of supply and quality of energy are increasingly growing and the enterprises of electricity distribution are asked to meet them and to provide a high quality of service. This paper aims to provide knowledge and to assist decision-makers to understand the impacts of information and communication technologies (ICT) integration in the conventional p...

Computer pioneers have correctly predicted that programmers would want unlimited amounts of memory. An economical solution to this desire is the implementation of a Memory Hierarchical System, which takes advantage of locality and cost/performance of memory technologies. As time has gone by, the technology has progressed, bringing about various changes in the way memory systems are built. Memor...

Let g be a complex finite dimensional simple Lie algebra with the root datum (Y,X, . . . ), see [Lu2]. Let Wf denote the Weyl group, R denote the root system, R+ denote the set of positive roots. Let X+ denote the set of dominant integral weights. Let h denote the Coxeter number of g. Let us fix l ∈ N, l > h. We assume that l is odd (and not divisible by 3, if g is of type G2). Let W denote the...