In the definition of derived classes in OODBs, the problem of integration of derived classes in object schemas is one of the main issues that has to be resolved. Derived classes are defined during the lifetime of the database to be included in some external schema or in the conceptual schema. Different solutions to this problem have been previously proposed; some of them involve the extension o...

External schemas are derived from the database conceptual schema; they can be used to simulate changes in it. Sometimes the final users’ information requirements change: they need new information which cannot be derived from the information in the database. The solution put forward here is the definition of partially derived classes (capacity augmenting classes) which may contain non-derived in...

Abstract Estimating dynamic storage as a metric can be used to make an overall assessment of catchment resilience extreme weather events such droughts and floods. Because the complexity direct empirical measurements, bucket-type hydrological models suitable tool simulate across broad range scales they require minimal input data. However, these consist one or more conceptual structures based on ...

Despite a large body of research on creativity in architecture, the concept of creativity as a multi-faceted phenomenon in design studios is still challenging. The present study aims to analyze the related literature and systematically categorize them to provide a conceptual framework to enhance creativity in design studios. By using a qualitative researcher method along with Sandelowski and Ba...

BACKGROUND Hepatitis B Virus (HBV) disproportionately affects new immigrants from endemic regions such as China. Untreated infections increase health risks for liver diseases including cancer. Yet most of those infected are unaware of their disease limiting prevention and early treatment options. The purpose of this community based study was to evaluate a heuristic model identifying factors con...

In previous studies we first concentrated on utilizing crisp simulationto produce discrete event fuzzy systems simulations. Then we extendedthis research to the simulation of continuous fuzzy systems models. In this paperwe continue our study of continuous fuzzy systems using crisp continuoussimulation. Consider a crisp continuous system whose evolution depends ondifferential equations. Such a ...

The reactivation of the hepatitis B virus (HBV) following systemic chemotherapy reportedly caused acute liver dysfunction as a fatal complication. HBV sometimes occurs even after cessation chemotherapy, especially in patients with hematological malignancies. A retrospective survey surface (HBs) antigen-negative cancer HBs and/or HBc antibodies was conducted by multidisciplinary team to determin...

This paper considers conceptual modelling for three purposes namely data modelling, knowledge modelling and ontology modelling. It differentiates between the nature of the conceptual models for these three. It then proposes a representation suitable for ontology modelling.