This work introduces methodologies for extending the modelling and querying capabilities of Trajectories Data Warehouses (TDW) in the context of semantic trajectories. Specifically, we incorporate the notion of Semantic Relatedness (SR) as part of the formal model of a TDW, which enables capturing the similarity between different annotations describing Points of Interest (POI), locations and ac...

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Data Warehouses and on-line analytical processing (OLAP) systems are a promising area for the application of Abstract State Machines (ASMs). In this paper a ground model specification for data warehouses is sketched that is based on the fundamental idea of separating input from operational databases and output to OLAP systems. On this basis we start defining formal refinement rules for such sys...

OLAP systems support data analysis through a mul-tidimensional data model, according to which data facts are viewed as points in a space of application-related \dimensions", organized into levels which conform a hierarchy. The usual assumption is that the data points reeect the dynamic aspect of the data warehouse, while dimensions are relatively static. However, in practice, dimension updates ...

BACKGROUND Loss to follow-up (LTFU) in clinical trials is an important source of bias that can affect statistical power and generalisability of findings. The aim of this paper is to assess factors associated with LTFU in the MObile Technology for Improved Family Planning (MOTIF) trial in Cambodia and compare how the result might have varied using different analytical methods. METHODS Follow-u...

Process of purchase or supply is one of the most important factors of competitiveness of companies. Therefore, the supply managers of companies are expected to select and evaluate the suppliers, to provide the company needs. Evaluation of suppliers based on only one factor is not possible and it is necessary to adopt a method that several factors simultaneously be evaluated. Suppliers can be ev...

The Pre-Project Phase of building construction manages the communication between client organization, user groups and designers. Disconnects and miscommunication in this phase may result in a product that does not fulfill their expectations. Based on literature review, three methods are introduced in order to streamline the communication and improve its precision: a method for criteria manageme...

In recent years, determining the best supplier has become a key strategic consideration in the competitive market. Since the decision commonly involves evaluating different criteria or attributes, supplier selection process is a multiple criteria decision-making (MCDM) problem. This study integrates the Taguchi loss function, analytical hierarchy process (AHP) and multi-choice goal programming ...