Future high speed, broadband networks such as BISDN (Broadband Integrated Services Digital Network) support diverse applications like voice, video and data transfer. ATM (Asynchronous Transfer Mode) is considered to be the most promising transfer technology for implementing these networks. This paper presents a scheme, which may be used for the performance evaluation of ATM switching networks w...

This paper presents a family of finite difference schemes for the first and second derivatives of smooth functions. The schemes are Hermitian and symmetric and may be considered a more general version of the standard compact (Padé) schemes discussed by Lele. They are different from the standard Padé schemes, in that the first and second derivatives are evaluated simultaneously. For the same ste...

We report our experience with formulating and analyzing in the probabilistic model checker PRISM various closely related web server performance models that were previously described in literature in terms of classical queuing theory. By our work various ambiguities and deficiencies (also errors) are revealed; in particular, the PRISM models which combine state machines descriptions with perform...

Keywords: Fluid queue Markov process Buffer occupancy distribution IEEE 802.11 wireless networks Performance measures a b s t r a c t We present a fluid queue model driven by two independent finite state birth–death processes with the objective to study the buffer occupancy distribution in any intermediate node in a communication network. In a communication network, at any node, the arrival and...

A linear-elastic computer simulation (model) for a single particle of TRISO fuel has been built using bond-based peridynamic technique implemented in the finite element code ‘Abaqus’. The model is able to consider elastic and thermal strains each layer simulate potential fracture both within between layers. 2D cylindrical makes use plane stress approximation perpendicular modelled. choice was m...

in the past 25 years, rising of the caspian sea level, part of a natural treat to the sea, has inundated and destroyed many buildings and arable lands and threatened many inhabitations in coastal areas. the main reason for these damages is that the law-setback has lost its efficiency and human activities have proceeded seaward. the goal of this study is to introduce a proper setback line for th...