abstract: performance evaluation models of information and communication technology (ict) sectors have been already considered with many perspectives of ict management. since ict has two distinct aspects of usefulness and harmfulness for the environment, therefore, this research with regard to the new dimension named environment, is going to present a new performance evaluation model with the a...

The evolution of ontologies is an undisputed necessity in ontology-based data integration. Yet, few research efforts have focused on addressing the need to reflect the evolution of ontologies used as global schemata onto the underlying data integration systems. In most of these approaches, when ontologies change their relations with the data sources, i.e., the mappings, are recreated manually, ...

We calculate the three loop gauge β-function for an abelian N = 1 supersymmetric gauge theory, using DRED. We construct a coupling constant redefinition that relates the result to the corresponding term in the NSVZ β-function, and by generalising this redefinition to the non-abelian case we derive the DRED three loop gauge β-function for the non-abelian case.

Current use of inheritance has illustrated that the introduction of conceptual inconsistencies is possible in a class hierarchy. This paper discusses the reasons why complete method redefinition infringes the essence of inheritance. A redefinition metric set is proposed and practical experiments demonstrate that the results obtained permit the detection of inheritance design problems. Appropria...