Module replication and assignment for real-time distributed processing systems

Article Abstract:

A new technique has been developed which estimates task response time for real-time systems. This technique takes into account such factors as interprocessor communication; module precedence relationships, scheduling, and assignment to computers; and interconnection network delay. An algorithm iteratively uses a small number of initial assignments to search for module assignments and replications that can reduce response time. The generated assignments and replications satisfy specified thread response times, and compare closely to simulation results.

Distributed Processing, Response Time

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Testbed-based validation of design techniques for reliable distributed real-time systems

Article Abstract:

Two tightly coupled multi-computer testbeds may be used to support the validation of system concepts and design for distributed real-time systems. The testbeds, which evaluate, analyze, and study the behavior of algorithms, can be made to represent operating environments and input scenarios more accurately than simulation. They can provide greater insight into the characteristics and limitations of proposed concepts. These testbeds have been used to study distributed recovery block schemes, and to analyze database locking techniques.

Operating systems (Software), Algorithms, Algorithm, Multifunctional, Distributed Systems, Operating Environments

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A microprocessor controlled programmable switching module for phased array applications

Article Abstract:

An new algorithm is described as the basis of a simple assembly language program that enables an 8085 microprocessor to provide programmable switching of PIN diodes. These are used in switching modules that contain two delay lines with different delays for an antenna array scanning system. Details of the implementation are described.

Programmable controllers, Implementation, Functional Capabilities, Switching, Algorithm Analysis, Programmable Controller, Phase Modulation, technical

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