ion levels that can be objectively distinguished and can be applied to smaller units. For example, current definitions of the conceptual level as a level for communications between user and analyst are not fully objective. Well-trained users and analysts may find the relational model easy for communication (Siau, 2004). Or people may simply have different opinions and preferences on the models ...

constructivism, as a method of discussion in international politics and foreign policy, is considered a young method which is based on philosophical subjects in social sciences. first the article presents the philosophical approach of constructivism through a logical course and shows its difference with competitive approaches; then enters the constructivism of international relations and discus...

The aim of the paper is to propose a method for evaluation of logical database models in the context of transaction performance. Logical database models can be regarded as PSM models within MDA architecture. The logical database models are driven from a given conceptual database model (a part of PIM model within MDA) by applying different transformations rules. The evaluation method takes into ...

Object-Role Modeling (ORM) is a method for modeling and querying an information system at the conceptual level, and mapping between conceptual and logical (e.g. relational) levels. ORM comes in various flavors, including NIAM (Natural language Information Analysis Method). This article provides an overview of ORM, and notes its advantages over Entity Relationship and traditional Object-Oriented...

in regard to different structure of factors affective to personnel productivity in different organizations, this research is performed with the purpose of designing and fitness of conceptual model of personnel productivity using interpretive structure modeling in ferdowsi university of mashhad. the survey method and researcher-made questionaire was used for data collection in this research. the...

Object-Role Modeling (ORM) is a method for modeling and querying an information system at the conceptual level, and mapping between conceptual and logical (e.g. relational) levels. ORM comes in various flavors, including NIAM (Natural language Information Analysis Method). This article provides an overview of ORM, and notes its advantages over Entity Relationship and traditional Object-Oriented...