The life cycle cost of a system is influenced by its maintainability. Maintainability is a design parameter, whose operational conditions can affect it significantly. Hence, the effects of these operational conditions should be quantified early in the design phase. The proportional repair model (PRM), which is developed based on the proportional hazard model (PHM), can be used to analyze mainta...

Interoperability and reusability are major issues in large-scale software system development. Military applications, one of such large scale software systems, have utilized the Common Operating Environment (COE) for the last decade. The COE reduces duplicated development effort and enhances the reusability/interoperability by providing standardized infrastructure and development guidelines. The...

Currently the market of mobile operating systems is divided between several platforms and developers have to target more than one in order to achieve a large number of users [4]. Reimplementing an existing application for a second platform is no trivial task, though. Developers need to learn the second platform’s API, concepts and paradigms such as an app’s life cycle, the platform’s caching me...

INTRODUCTION Staff time is a relevant resource in the delivery of health care interventions. Its measurement is a prerequisite for unit costing but usually complex. The aim of this study was to analyse the distribution of surgeons' work time among types and places of activities. A second aim was to use these data to calculate costs per unit of output. METHODS A self-reporting work sampling st...

This paper is a reminder of the danger of allowing \risk" when synchronizing a parallel discrete-event simulation: a simulation code that runs correctly on a serial machine may, when run in parallel, fail catastrophically. This can happen when Time Warp presents an \inconsis-tent" message to an LP, a message that makes absolutely no sense given the LP's state. Failure may result if the simulati...

This paper studies a networked system identification problem, which aims at identifying mathematical models required in networked control/estimation/filtering systems. Specifically, we consider the off-line identification of open-loop stable linear time-invariant processes working in a networked environment. In the networked environment, how the actuators (D/A conversion) operate plays a key ro...