The use of rules in a distributed environment creates new challenges for the development of active rule execution models. In particular, since a single event can trigger multiple rules that execute over distributed sources of data, it is important to make use of concurrent rule execution whenever possible. This paper presents the details of the Integration Rule Scheduling (IRS) algorithm. Integ...

it is now more than four decades from providing and execution of iran’s first comprehensive urban plan. evaluation of this plan shows that the process of execution has not been successful. considering the literature review, field study as well as comparing the plan’s documents, it is thought that lack of coordination between the urban planning organizations, the manner of providing and executio...

Event-driven architectures are currently a popular design choice for scalable, high-performance server applications. For this reason, operating systems have invested in efficiently supporting non-blocking and asynchronous I/O, as well as scalable event-based notification systems. We propose the use of exception-less system calls as the main operating system mechanism to construct highperformanc...

The multimode resource-constrained project scheduling problem (MRCPSP) is an extension of the single-mode resourceconstrained project scheduling problem (RCPSP). In this problem, each project contains a number of activities which precedence relationship exist between them besides their amount of resource requirements to renewable and non-renewable resources are limited to the resources availabi...

Recent years have witnessed increased adoption of hosted hypervisors in virtualized computer systems. By non-intrusively extending commodity OSs, hosted hypervisors can effectively take advantage of a variety of mature and stable features as well as the existing broad user base of commodity OSs. However, virtualizing a computer system is still a rather complex task. As a result, existing hosted...

Database community has made significant research efforts to optimize query processing on GPUs in the past few years. However, we can hardly find that GPUs have been truly adopted in major warehousing production systems. Preparing to merge GPUs to the warehousing systems, we have identified and addressed several critical issues in a threedimensional study of warehousing queries on GPUs by varyin...

The use of agent-based simulation models in NetLogo for research is growing rapidly in a number of fields of science and engineering, including in computer science, for example for analyzing the performances of asynchronous search techniques based on distributed constraints. Distributed Constraint programming (DisCSP/DCOP) is a programming approach used to describe and solve large classes of pr...

Apart from resources, such as memory and processors, parallel computations also require file I/O. There exist a number of interesting file I/O modes, depending on the specific application. One particularly interesting file I/O mode is serial-append, described in [5]. In this mode the file output of a parallel computation, executed on any number of processors, is “the same” as the output of the ...