GPSS (General Purpose Simulation System) is celebrating its 40 birthday this year. We recognize this notable birthday by assembling a panel of discussants consisting of some of the folks who have contributed significantly to GPSS and its use over the years. The panelists are Springer Cox (GPSS/PC and GPSS World), Jim Henriksen (GPSS/H and Proof Animation), Peter Lorenz (promoter of GPSS in Euro...

The GPSS-FORTRAN simulator is a Fortran program package suitable for modelling discrete systems. It consists of a chassis, the main program, into which calls to the modules, GPSS-FORTRAN's subroutines are inserted. Its construction makes it superior in several respects to its grandparent, GPSS. Other simulation languages and tools for the analysis of discrete systems such as SIMULA, SIMSCRIPT a...

2 PRODUCT OVERVIEW GPSS/H is a tried-and-true simulation tool whose user base, both commercial and academic, continues to grow despite the presence of many "new" simulation technology trends. The process-interaction world view combines with the advanced features available in GPSS/H to make one of the most powerful and flexible tools available, capable of hnndling the largest simulation projects...

GPSS/H was first placed into commercial service in November, 1977. Over the ensuing 23 years, it has become well known for its speed and dependability. In GPSS/H, the process-interaction world view has been combined with many advanced features to make an extremely powerful and flexible tool, capable of handling large, complicated models with ease, yet still providing exceptionally high performa...

A scheduling process that maintains, repairs and configures a space shuttle orbiter must satisfy temporal, resource and configuration constraints. The GPSS, which stands for ground processing scheduling system, has been successfully used to schedule tasks that prepare an orbiter for its next launch. The objective of this project is to enhance and to improve the GPSS. The GPSS uses an iterative ...

GPSS/H is a traditional simulation language that is well known for its speed and dependability. In GPSS/H, the process-interaction world view has been combined with many advanced features to make an extremely powerful and flexible tool, capable of handling large, complicated models with ease, yet still providing exceptionally high performance. The following sections provide an overview of GPSS/...

This paper presents a systematic approach for the design of power system stabilizer using genetic algorithm and investigates the robustness of the GA based PSS. The proposed approach employs GA search for optimal setting of PSS parameters. The performance of the proposed GPSS under small and large disturbances, loading conditions and system parameters is tested. The eigenvalue analysis and nonl...

GPSS 11, a general purpose digital systems simulation program based on a block diagram language. The program i s a result of incorporating improvements dictated by extensive experience in the application of a n earlier version. However, this article i s self-contained. Development and application of the language are illustrated by means of an example. Recent years have seen the development of s...

The leukocyte migration test (LMT) reactivity of breast cancer patients to Rill murine mammary tumor virus (MuMTV) gp55 was studied and compared with simulta neous reactivity to the following: (a) RIM gp55 prepared in another laboratory; (b) gp68, gp34, and p28 of Rill MuMTV; (c) gpSO of A-strain MuMTV; (d) gp70 and gp45 of Rauscher leukemia virus; and (e) autologous and homol ogous lymphoretic...