A process is the main part of a computeroperating system. Its role is to fulfil its task(s). But if it contains errors it may disrupt the proper work of the host computeroperating system. Any disruption affects host...
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ISBN:
(纸本)9781315736976;9781138026810
A process is the main part of a computeroperating system. Its role is to fulfil its task(s). But if it contains errors it may disrupt the proper work of the host computeroperating system. Any disruption affects host computeroperating system security. In this paper, the authors evaluated behaviour of a test process and its influence on the increasing use of operating memory, which is the element of the host computeroperating system efficiency. Then an interaction between processes was evaluated.
The paper contains a short description of the M-140 micro-computer architecture and the minimal set of primitives consisting of the nucleus of the REX/80 operating system. Special emphasis is put on explaining the ado...
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ISBN:
(纸本)9635922957
The paper contains a short description of the M-140 micro-computer architecture and the minimal set of primitives consisting of the nucleus of the REX/80 operating system. Special emphasis is put on explaining the adopted principle of the synchronization of many processors and tasks in the system. The way of inter-task communication based on sending and receiving messages is also discussed. Finally, the paper describes the principles of designing the user task based on the above mentioned nucleus.
Information security is everyone's concern. computersystems are used to store sensitive data. Any weakness in their reliability and security makes them vulnerable. The Common Vulnerability Scoring System (CVSS) i...
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This paper has described the background surrounding the development of several DoD trusted computersystems including the DoD Kernelized Secure operating System and the Kernelized VM370 System, and the implications of...
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作者：
Foudriat, Edwin C.NASA
Langley Research Cent Hampton VA USA NASA Langley Research Cent Hampton VA USA
operating system structure holds the key to obtaining improved processing power, greater reliability, transparent sharing of distributed resources, etc. A look at the present taxonomies of both concurrent and distribu...
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ISBN:
(纸本)0444700226
operating system structure holds the key to obtaining improved processing power, greater reliability, transparent sharing of distributed resources, etc. A look at the present taxonomies of both concurrent and distributed systems demonstrate that they are predominantly hardware and communication structure oriented and that good functional taxonomies from the user's viewpoint do not exist. This makes it difficult to ascertain how the above features are supplied in a particular distributed system. A taxonomy based upon O/S indivisibility (control) does indicate whether it is reasonable to expect a particular kernel structure to be able to support specific O/S features. Using the O/S based taxonomy to analyze the development of computer network structures identifies those structures that can support both distributed resources and distributed control.
operatingsystems for process control applications are generated automatically by a ″kit″ of program functions. The capabilities of the nucleus and the strategies of the operating objective are formed individually a...
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operatingsystems for process control applications are generated automatically by a ″kit″ of program functions. The capabilities of the nucleus and the strategies of the operating objective are formed individually according to the requirements of the user. The underlying concepts and the result of the implementation are described.
This paper presents a virtual I/O approach to extend an existing personal computer to provide a multiple operating environment. Multiple operatingsystems can be executed simultaneously, each using a separate window a...
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This paper presents a virtual I/O approach to extend an existing personal computer to provide a multiple operating environment. Multiple operatingsystems can be executed simultaneously, each using a separate window as its console display. A user can swiftly switch his work among different operatingsystems by activating corresponding windows. Furthermore, these operatingsystems can be integrated so that the programs under their control can cooperate with each other in a transparent manner. The cooperation is established by using a shared file system and a guest layer mechanism. Current portable operatingsystems can be easily ported and integrated. A personal computer has been extended to integrate up to four different operatingsystems. This experimental system is presented to show the advantages of integrating multiple operatingsystems in a stand-alone machine and serves as the base for further exploration.
Aiming to enhance the management stage of Mobile English Interactive Educating in the intelligent flipped classroom mode, a design method of Mobile English Interactive Teaching Based on deep learning is proposed. Extr...
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It is widely recognized among professionals that business, scientific, and engineering information at most computer sites is seriously vulnerable. And the situation can only get worse as the amount and variety of info...
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It is widely recognized among professionals that business, scientific, and engineering information at most computer sites is seriously vulnerable. And the situation can only get worse as the amount and variety of information stored in computersystems continues to grow. Consequently, many system managers have been taking concrete steps to better protect their firms' information resources and, in the process, they're finding that good computer security need not be expensive, disruptive, or in any way handicap legitimate access. Security-oriented operatingsystems based on a standard model provide several ways to prevent unauthorized computer access and protect data integrity.
This paper describes the structure of the supervisory system for a distributed computer network. The network is designed so that processes and data can migrate among the processors as a function of load sharing and re...
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This paper describes the structure of the supervisory system for a distributed computer network. The network is designed so that processes and data can migrate among the processors as a function of load sharing and resource availability. The key concepts in the system design are the use of a standard virtual-storage and process structure, a standard interprocess communication facility and a standard higher-level language interface. These concepts are illustrated by a description of two operatingsystems designed for use in the net work; one which runs on a D. E. C. PDP11/45 and another which runs on a Univac 1100-series machine.
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