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In this paper, a centralized deadlock detection algorithm with multiple outstanding requests (CDDMOR) is proposed for use in distributed database systems and transaction-processing systems. This algorithm allows a process to request many resources simultaneously. While a centralized scheme is superior to a completely distributed scheme in terms of performance, a major problem of such a scheme is congestion...
Performance of a Concurrency Control Algorithm (CCA) managing a distributed database system will deteriorate considerably when the configuration of the network supporting it will change due to either communication link failures or the communication delays introduced by varying load patterns. To get a good performance in spite of the changing configurations, we propose a scheme that involves breaking...
Advances in material technology and wafer processing in the past years have made GaAs monolithic microwave integrated circuits practical. Obvious applications for this technology include systems for satellite communication and phased array radars. State-of-the-art performance of GaAs FETs and their application in hybrid microwave integrated circuit will be introduced. The recently developed microwave...
Many future NASA programs require very high accurate pointing stability. These pointing requirements are well beyond anything attemped to date. This paper suggests a control system which has the capability of meeting these requirements. An optimal control law for the suggested system is specified. However, since no direct method of solution is known for this complicated system, a computation technique...
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