Distributing an application onto several machines is one of the key aspects of Grid-computing. In the last few years several groups have developed solutions for the occurring communication problems. However, the focus on the machines used in distributed environments has changed over the time from Massively Parallel Processing Systems to Clusters. This paper presents the problems arising when co...

In my previous article "Subdivision Surface Theory" , I explained what subdivision surfaces were and why game developers should be interested in them. I also covered a couple different kinds of subdivision surfaces in their mathematical forms and briefly discussed their benefits and detriments. Most everything was in English, and the rest was expressed using equations. There were no code listin...

This paper discusses a new AD system that correctly and automatically accepts nested and dynamic use of the AD operators, without any manual intervention. The system is based on a new formulation of AD as highly generalized first-class citizens in a ń-calculus, which is briefly described. Because the ń-calculus is the basis for modern programming-language implementation techniques, integration ...

OBJECTIVE To investigate the barriers and facilitators of an effective implementation of an outcome monitoring and feedback system in a UK National Health Service psychological therapy service. METHOD An outcome monitoring system was introduced in two services. Enhanced feedback was given to therapists after session 4. Qualitative and quantitative methods were used, including questionnaires f...

Decentralized services, that is, services distributed across multiple, distinct spheres of authority, offer substantial challenges; particularly when we demand that they be both adaptive and secure. We consider decentralized services in the context of COmputAtional State Transfer (COAST), an architectural style for which service adaptivity and security are principal concerns, and discuss how th...

We propose an iterative method for solving a complex-symmetric linear system arising in electric power networks. Our method extends Gremban, Miller, and Zagha’s [in Proceedings of the International Parallel Processing Symposium, IEEE Computer Society, Los Alamitos, CA, 1995] support-tree preconditioner to handle complex weights and vastly different admittances. Our underlying iteration is a mod...

Organizations invest substantial resources in Enterprise Systems (ES) expecting positive outcomes for the organization and its functions. Implementing an ES is a lengthy and costly undertaking, with general upheaval for many of the organizations. Many organizations therefore are seriously considering rapid ES-implementations to reduce cost and other related resources. This paper presents findin...

An adaptive mesh projection method for the time-dependent incompressible Euler equations is presented. The domain is spatially discretised using quad/octrees and a multilevel Poisson solver is used to obtain the pressure. Complex solid boundaries are represented using a volume-of-fluid approach. Second-order convergence in space and time is demonstrated on regular, statically and dynamically re...

OBJECTIVE To identify the possible barriers to the implementation of Pharmaceutical care among Community and Hospital pharmacists in Enugu State using Nsukka and Enugu metropolis as a case study. METHOD A semi structured questionnaire was designed to carry out a cross sectional descriptive study. The questionnaires were distributed to community and hospital pharmacists from designated areas d...

A novel simplified control scheme for threephase switch-mode rectifier is proposed in this paper. The proposed control scheme is based upon a load-conductance rectifier controller, in which reference current signals are obtained. The goal to follow the reference current is converted to follow a reference voltage. A simplified control scheme utilizing space-vector modulation is developed to calc...