Based on the recent progress of digital cartography, global positioning systems (GPSs), and hand-held devices, there are growing needs of technology that provides neighborhood information to moving objects according to their locations and trajectories. In this paper, we propose spatial query generation models that take account of the current position and the past/future trajectories of a moving...

s In accordance with innovations of construction methods and robotizations at the site, construction engineers need more relevant management tools for planning and scheduling the construction process. It has become essential to apply system simulation techniques to planning and scheduling. The author has developed an simulation methodology for the construction process at building sites. The sim...

Discrete simulation is a suitable application area for several disciplines in high schools. One such discipline is Computer Science. Other disciplines are e.g. mathematics and business. The main principles of modeling information can be practiced in a suitable simulation project. For the implementation of the model on the computer, two different versions of Integrated Development Systems for GP...

In many real-life queueing systems, the servers are often heterogeneous, namely they work at different rates. This paper provides a simple method to compute tight upper bounds on two important performance measures of single-class heterogeneous multi-server Markovian queueing systems, namely the average number in queue and the average waiting time in queue. This method is based on an expansion o...

As recent programming languages provide improved conciseness and flexibility of syntax, the development of embedded or internal Domain-Specific Languages has increased. The field of Modeling and Simulation has had a long history of innovation in programming languages (e.g. Simula-67, GPSS). Much effort has gone into the development of Simulation Programming Languages. The ScalaTion project is w...

In the conventional system development life cycle (SDLC), system performance and evaluation phase comes after the implementation phase. The aim of this research is to project system performance estimate at the requirement analysis and design phase itself, much before the implementation phase. This study introduces novel tools for modelling the system, evaluating the performance of the system an...

Archaeology is one of the sectors that can benefit by new surveying techniques (i.e. those ones related to the use of GPS) for the representation and the management of an archaeological site. Another aspect of the archaeological sector that can take advantage from the use of both GPS and GIS instruments is guided visits of archaeological sites. Today, during visits in museums, visitors often us...

This paper describes a new modeling system – Simio TM that is designed to simplify model building by promoting a modeling paradigm shift from the process orientation to an object orientation. Simio is a simulation modeling framework based on intelligent objects. The intelligent objects are built by modelers and then may be reused in multiple modeling projects. Although the Simio framework is fo...

Norden's expanded and interactive version of GPSS/360 has been extensively improved through new data entry and storage capabilities, a a new report generator, selective output display, and HELP blocks to enable model manipulation and to provide a a "window" to view the simulation during its progress. The data entry and manipulation system allows the user to input and display matrix savevalues t...