As cluster computing becomes increasingly more accessible, the need for tools to simplify the development and use of parallel simulations grows proportionally. One class of tools, steering and visualization middle-ware, promises to assist in code development as well as increase the value of the final simulation produced. In this paper we discuss this middle-ware and our experiences instrumentin...

We review the characteristics of strategic software and we try to answer the question whether there can exist open software development that would be able to incorporate these characteristics. Based on this review, and on certain case studies, we present a theory, on how open software might be able to close the gaps in knowledge creation and usage or the reverse, ie. to become a vehicle for an ...

We extend the Tarone and Ware scheme of weighted log-rank tests to cover the associated weighted Mantel-Haenszel estimators of relative risk. Weighting functions previously employed are critically reviewed. The notion of an average hazard ratio is defined and its connection to the effect size measure P(Y > X) is emphasized. The connection makes estimation of P(Y > X) possible also under censori...

Building a data warehouse is a very challenging task. Most of the data ware house project fails to meet the business requirements and business goals because of the improper requirement engineering phase. The chaos all through the development of requirements evolves due to disparity between users and developers resulting in project devastations and terminations. Data warehouse quality depends on...

The coordination of concurrent activities in collaborative environments is a very important and difficult task. Many approaches for the construction of large-scale flexible group-ware applications there exist in the literature. They provide valid support to modelling, analysis and to a whitebox developing of coordination protocols for computer supported cooperative applications. Little attentio...

Most of the data ware house project fails to meet the business requirements and business goals because of the improper requirement engineering phase. The chaos all through the development of requirements evolves due to disparity between users and developers resulting in project devastations and terminations. Building a data warehouse is a very challenging task. Data warehouse quality depends on...

The development of aviation engine control soft ware is a prime example of a process in which the overriding concern is safety In building such a com plex system change is inevitable This paper discusses the aims of CONVERSE an EPSRC funded project to investigate change management in safety critical soft ware development The aim is to reduce the costs which occur due to change while allowing ra...

This internal medicine grand rounds is the first Elgin W. Ware Lectureship in Medical History (Figure (Figure11). Dr. Elgin Ware, a long-time urologist at Baylor University Medical Center at Dallas and chief of urology from 1986 to 1987, has spent his entire life in Dallas: he graduated from Highland Park High School, Southern Methodist University, and the University of Texas Southwestern Medic...