Commercial operating systems have recently introduced mandatory access controls (MAC) that can be used to ensure system-wide data confidentiality and integrity. These protections rely on restricting the flow of information between processes based on security levels. The problem is, there are many applications that defy simple classification by security level, some of them essential for system o...

The rapid growth of networking, data sharing, and the Internet has made computer security an important part of computer research and development. A number of highly secure operating systems have been developed to handle the increasing need for security. These operating systems, typically called Trusted Operating Systems, offer a number of security mechanisms that can help protect information, m...

We analyze investments in gas fired power plants under stochastic electricity and gas prices. A simple but realistic two-factor model is used for price processes, enabling analysis of the value of operating flexibility, the opportunity to abandon the capital equipment, as well as finding thresholds for energy prices for which it is optimal to enter into the investment. Our case study, using rea...

Several operating systems projects revolve around moving functionality above or below the kernel “red line” to increase flexibility or performance. We describe how a general model of partial evaluation encompasses this trend. The operating systems community should not be content with a single interface between applications and the operating system, even if that interface allows extension below ...

This report presents a review of recent research into exible operating systems. In this context, exible operating systems are taken to be those whose designs have been motivated to some degree by the desire to allow the system to be tailored, either statically or dynamically, to the requirements of speci c applications or application domains. We begin by presenting a review of recent research i...

The intrinsic goal of any operating system (OS) is to free the application level from tasks that are either repeating or hard to accomplish. In the 80s and 90s there have been strong efforts to develop distributed OS providing fully location transparency. Although these projects delivered valuable results on certain aspects of distributed computing, satisfactory general purpose distributed reso...

Nowadays, in turbulent and violate global markets, agility has been considered as a fundamental characteristic of a supply chain needed for survival. To achieve the competitive edge, companies must align with suppliers and customers to streamline operations, as well as agility beyond individual companies. Consequently Agile Supply Chain (ASC) is considered as a dominant competitive advantage.  ...

A distributed operating system provides a process abstraction and primitives for communication between processes. A distributed programming language regularizes the use of the primitives. mating them bolh safer and more convenienL The level of abstraction of the primitives, and therefore the dh"ision of labor between the operating system and the language suppnn routines. has serious ramificatio...

Fault tolerance is an important issue in operating system. Checkpointing and Rollback Recovery (CRR) is a key technique to fault tolerance. Its simplicity and effectiveness make it widely applied to fault maintenance of operating system. CRR can be divided into checkpoint storage and restoration. And checkpoint storage is key factor to real-time of checkpoint recovery. Current checkpoint storag...

A distributed operating system provides a process abstraction and primitives for communication between processes. A distributed programming language regularizes the use of the primitives, making them both safer and more convenient. The level of abstraction of the primitives, and therefore the division of labor between the operating system and the language support routines, has serious ramificat...