Modern defence systems include advanced aircraft, ships, radar, weapons, command and control systems, and most importantly human operators. The main objective of modelling and simulation tools is to allow operational analysts to rapidly specify and evaluate existing and proposed systems and procedures for operating these systems. Such tools are required to model all aspects of defence systems i...

this article proposes a direct method for solving three types of integral equations with time delay. by using operational matrix of integration, integral equations can be reduced to a linear lower triangular system which can be directly solved by forward substitution. numerical examples shows that the proposed scheme have a suitable degree of accuracy.

Reversible computation has a growing number of promising application areas such as the modelling of biochemical systems, program debugging and testing, and even programming languages for quantum computing. We formulate a procedure for converting operators of standard algebraic process calculi such as CCS, ACP and CSP into reversible operators, while preserving their operational semantics.

This paper raises the question on how to specify timeouts in process algebra, and finds that the basic formalisms fall short in this task. Consider the following protocol for a mail server: Set a timer for an unspecified but finite amount of time, and try to send a message again and again until it either succeeds or the timer goes off. In the latter case return an error message. Optionally, som...

S lack can act as a double-edged sword. While it can buffer against environmental threats to help ensure business continuity, slack can also be costly and reduce profitability. In this study we focus on operational slack, the form related to the firm’s production processes. We investigate the role of operational slack on firm survival during its venture stage when its survival is significantly ...

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We propose operational method with recourse to generalized forms of orthogonal polynomials for solution of a variety of differential equations of mathematical physics. Operational definitions of generalized families of orthogonal polynomials are used in this context. Integral transforms and the operational exponent together with some special functions are also employed in the solutions. The exa...