Modelling of Time Efficiency in Heterogeneous and Adhoc Networks

Hybrid modelling of time-variant heterogeneous objects

Energy Efficiency of Resource Management Architectures in Heterogeneous Wireless Networks

The Heterogeneous Wireless Networks (HWN) paradigm is based on the interoperability and coexistence of different types of wireless access networks in a unified wireless heterogeneous platform. A key aspect in this concept is the management of the available resources, in terms of user perception, in the most efficient way. Therefore, Resource Management (RM) architectures are tailored to maximiz...

Speedup and Efficiency of Large Size Applications on Heterogeneous Networks

Program environments are now commonly used for parallelism on networks of workstations. There is a need for simple and consistent tools to measure algorithm performance on heterogeneous networks. In this work we propose a generalization to heterogeneous networks of the classical eeciency formula E(N) = S(N)=N, where S(N) is the speedup on N processors.

Retrial Queues for Performance Modelling and Evaluation of Heterogeneous Networks

In this paper a single server retrial queue with a finite number of heterogeneous sources of calls is investigated. It is assumed when a given source is idle it will generate a primary call after an exponentially distributed time. If the server is free at the time of the request’s arrival then the call starts to be served. The service time is also exponentially distributed. During the service t...

Modelling of High Quantum Efficiency Avalanche Photodiode

A model of a low noise high quantum efficiency n+np Germanium Photodiode utilizing ion implantation technique and subsequent drive-in diffusion in the n layer is presented. Numerical analysis is used to study the influence of junction depth and bulk concentration on the electric field profile and quantum efficiency. The performance of the device is theoretically treated especially at the wave-l...