The article focuses on one genre of simulations: computer and video games. The author presents a generic model of the elements that co-operate in producing a simulation that is also a game. The model is applied into practice with a case study that focuses on one particularly interesting game: Grand Theft Auto: Vice City (Rockstar Games, 2002), a game that frames its gameplay by simulating certa...

A common problem in networking research and development is the duplicate effort of writing simulation and implementation code. This duplication can be avoided through the use of fast-prototyping methodologies, which enable reusing simulation code in real prototyping and in production environments. Although this functionality is already available by using ns-3 emulation, there are still limitati...

Security for dynamic address allocation service in Mobile Adhoc Networks is still an open issue. This paper proposes a security framework to thwart all possible attacks related to the buddy system based Distributed Dynamic Address Assignment Protocol (DDAAP) proposed by Thoppian and Prakash. Our proposed protocol called SHEAP (Secured tHrEshold based DDAAP) is based on a fully distributed PKI a...

We present a large neighbourhood search method for solving the frequency assignment problem with multiple source interferences. Starting from an initial solution, subproblems of auto-adjustable size are iteratively generated and solved with either a greedy algorithm or an exact method. The approach has been successfully tested on realistic instances issued from military applications.

The enormous and growing complexity of today's high-end systems has increased the already significant challenges of obtaining high performance on today's equally complex scientific applications. Application scientists are faced with a daunting challenge in tuning their codes to exploit performance-enhancing architectural features. The Performance Engineering Research Institute (PERI) is working...

The impact of fast moving items, modeled by auto-regressive moving average (ARMA) type processes, on the bullwhip effect is well known. However, slow moving items that can be modeled using integer ARMA processes have received little attention. Herein, we measure the impact of bullwhip effect under a first order integer auto-regressive, INAR(1), demand process. We consider a simple two-stage sup...

In response to the enormous and growing complexity of today’s high-end systems, the Performance Engineering Research Institute (PERI) is working toward automating portions of the performance tuning process by developing an autotuning framework. Our framework employs empirical techniques to identify the best-performing version of a computation among a search space of possible implementations. Th...

OBJECTIVE We examined the personality correlates of accident-proneness of auto-rickshaw drivers in the Indian city of Ranchi. METHODS This was a cross-sectional study in which 50 male drivers aged 18-50 years, selected randomly from a list of licensed auto-rickshaw drivers in Ranchi, were assessed with a Hindi version of Cattell's 16 Personality Factors (16-PF) Questionnaire. RESULTS There ...

In this paper, we classified existing address autoconfiguration schemes based on two communication models: centralized and distributed schemes. We defined performance metrics and evaluated four existing address autoconfiguration schemes. We suggested requirements for an address autoconfiguration scheme.