Many recent proposals in the literature present easyto-use query languages, based on visual representations of the database and direct manipulation mechanisms. Such proposals essentially deals with conventional query operations, whereas little effort is devoted to investigate friendly environments for querying temporal databases. Nevertheless, temporal aspects are generally considered extremely...

The study of fuzzy intervals is of particular interest in temporal database research. In order to optimize the storage of fuzzy temporal intervals, some transformations have been proposed. In this paper we analyze the possibilistic evaluation of the ill-known temporal intervals. We propose a framework to deal with the evaluation of ill-known temporal intervals. It is shown how the reasoning beh...

A database specification consists of static and temporal constraints and a set of database operation descriptions. A database iS viewed as a dynamic object and a sequence of database states constitutes an evolution of the database. A formal method for verifying database specifications is proposed. The method checks if the static constraints are consistent, analyses the database operation descri...

Several database systems have implemented temporal data support, partly according to the model specified in the last SQL standard and partly according to other, older temporal models. In this article we use the most important temporal concepts to investigate their implementations in enterprise database systems. Also, we discuss strengths and weaknesses of these implementations and give suggesti...

Most current geographic information systems assume and present the static world. But, new generations of GIS applications have much more demands in comparison to possibilities, which could provide traditional database management systems. Information that exists in the spatial database may be updated over time. Also, the very important demand is time capability to answer to state changing in dat...

The temporal-reasoning task focuses on intelligent analysis of time-oriented data, while the temporalmaintenance task focuses on effective storage, query, and retrieval of these data. Both are highly relevant for biomedical applications such as monitoring, therapy, quality assessment, and visualization and exploration of time-oriented data, which cannot be expected to resolve each time both tas...

Education is one of the most important aspect in the human civilization. The prosperousness of the chosen education method can be ascertained through the testing approach. Examination is commonly used as an evaluating tool in formal education. As a result of the Information Technology development, the formation of question bank will be more manageable. Moreover its creates a new dimension of da...

We propose a language to define data update during schema versioning in a temporal object-oriented database. With this language, a user can express multi-schema modifications involving extensional data from different schema versions at the same time, improving the database environment with temporal and versioning features concerning database modification. We also provide the first steps towards...

We propose using a temporally ordered database for complex visual activity recognition. We use a temporal precedence relation together with the assumption of xed bounded temporal uncertainty of occurrence time of an atomic activity and comparatively large temporal extent of the complex activity. Under these conditions we identify the temporal structure of complex activities as a semiorder and d...

We propose using a temporally ordered database for complex visual activity recognition. We use a temporal precedence relation together with the assumption of fixed bounded temporal uncertainty of occurrence time of an atomic activity and comparatively large temporal extent of the complex activity. Under these conditions we identify the temporal structure of complex activities as a semiorder and...