After about two decades of evolution parallel database architectures have finally reached a maturity level that makes them a serious competitor to traditional mainframe based architectures and distributed database systems. Dealing with these innovative systems requires to change considerably the application design process, mostly because of the sophisticated physical data organization (e.g. rel...

We propose a signature-based indexing method for object-oriented query handling in this paper. Signature file based access methods initially applied on text for their filtering capability have now been used to handle set-oriented queries in Object-Oriented Data Bases (OODBs). All the proposed techniques use either search methods that take longer retrieval time or tree based intermediate data st...

Background and Objectives: Patient discharge process starts from the point of the initial order of the physician order and continues to the discharge time of a patient and the release of the bed that was allocated to him/her. Lengthening the patient discharge process is regarded as a negative factor in the management of beds; this lengthy process leads to delay...

Although docetaxel significantly improves survival in a variety of malignancies, its clinical utility is severely restricted by acquired chemoresistance and disease relapse. To uncover the mechanisms underlying these all too common occurrences, an abundance of research has focused on mutations and gene expression patterns; however, these findings are yet to translate into improved outcomes for ...

The problem of the design and implementation of parallel metric tree indexes, called M-trees, is elaborated. Four diierent object declustering techniques are proposed and tested in order to get a suucient evidence needed for specifying the pros and cons of their application. In general, the obtained I/O speedup and scaleup levels are high. A way how to deal with the CPU parallelism is also prop...

Analysis of a spatial phenomenon is to a great extent affected by the frequent irregular structures and/or the preferential clustering of the sampling schemes. To obtain representative statistics for an area of interest, the influence of clustered measurements needs to be reduced by attributing them lower weights. In this case study, two standard methods, the polygonal and the cell-declustering...