We show how the PEPA performance modelling language could be extended with a feature construct which can be used to describe modiications to PEPA models. We provide this construct with an operational description which conservatively extends the operational semantics of the PEPA language. We apply the feature construct in a small case study.

This technical report describes a machine checked proof of the type soundness of a subset of the Java language called JavaS . A formal semantics for this subset has been developed by Drossopoulou and Eisenbach, and they have sketched an outline of the type soundness proof. The formulation developed here complements their written semantics and proof by correcting and clarifying signi cant detail...

My friend and teacher, Fernando Flores, likes to tell his business clients the story of Pasteur and the dead cows. In the 1870s the French sheep and cattle industry was being decimated by anthrax and France’s economic position was in grave peril. At the time, the farmers were completely baffled by the mounting toll of dead cows and sheep; the cause, anthrax, had not yet been identified and name...

this study attempts to examine the operational efficiency of thirty-two microfinance institutions in india. operational efficiency in microfinance institutions refers to how well microfinance institutions allocate the input resources. since the study is an exploratory nature, therefore, the data are collected from mix market on annual basis. it covers the seven-year period ranging from 2005-06 ...

The fields of engineering and management associate efficiency with how well a relevant action is performed, i.e. ‘‘doing things right’’, and effectiveness with selecting the best action, i.e. ‘‘doing the right thing’’. Thus, a firm is effective if identifies appropriate strategic goals, and efficient if it achieves them with minimal resources. This chapter focuses on operational efficiency, or ...

We show how the PEPA performance modelling language could be extended with a feature construct which can be used to describe modifications to PEPA models. We provide this construct with an operational description which conservatively extends the operational semantics of the PEPA language. We then show how the feature construct can be applied in a small case study.

ed framework for the performability evaluation of fault-tolerant computer systems," IEEE Transac