in emerging electric power systems, increased transactions often lead to the situations where the system no longer remains in secure operating region. the flexible ac transmission system (facts) controllers can play an important role in the power system security enhancement. however, due to high capital investment, it is necessary to locate these controllers optimally in the power system. facts...

Not too long ago real time audio synthesis and signal processing used to be restricted to dedicated hardware. In the mid-nineties software synthesizers entered the field of desktop computing. At the same time software for real-time computer music systems moved from dedicated DSP’s to desktop computers with diverging operating systems. PD (Pure Data) is a computer music systems that showed a gre...

Audio and video applications, process control, agile manufacturing and even defense systems are using commodity hardware and operating systems to run combinations of real-time and non-real-time tasks. We propose an architecture that will allow a general-purpose operating system to schedule conventional and real-time tasks with diverse requirements, to provide flexible load isolation between app...

In this paper we describe G/G/R+s multi- repairmen machining system with balking. The system consists of M operating machines, S spare machines, R permanent and s additional repairmen. Assuming the discrete flow of machines by continuous one, the diffusion approximation technique for the machine repair system has developed. The system will be in normal working mode if there is M operating machi...

Introduction In the business management theory of constraints, throughput is the rate at which a system achieves its purpose. For a hospital the purpose or “aim of the system”, as W. Edward Deming refers to it, is to deliver quality patient care as efficiently as possible. Unfortunately, the fragmentation of a hospital’s activities across departmental operational silos propagates waste, comprom...

Applications must be able to synchronize accesses to operating system resources in order to ensure correctness in the face of concurrency and system failures. System transactions allow the programmer to specify updates to heterogeneous system resources with the OS guaranteeing atomicity, consistency, isolation, and durability (ACID). System transactions efficiently and cleanly solve persistent ...

The following contains a description of the principles and techniques used in a modular operating system being implemented at the National Physical Laboratory. The computer being used is a KDF9 with 32K words of core store and a disc file. The system provides a time-sharing and file handling capacity as well as the usual services to users.

Many modern systems, including web servers, database engines, and operating system kernels, are using language-based protection mechanisms to provide the safety and integrity traditionally supplied by hardware. As these language-based systems become used in more demanding situations, they are faced with the same problems that traditional operating systems have solved—namely shared resource mana...

This paper gives an overview of educational operating system called COLIBROS. It is small, object oriented, library operating system, based on micro-kernel concepts, supporting high level concurrency and synchronization primitives. In fact, COLIBROS is simplified operating system kernel accompanied with hardware emulation layer that emulates keyboard, monitor, disk and interrupt mechanism. A co...