This paper describes a set of tools that allows a developer to instrument a C/C++ program to log data at run-time and then analyze that data to verify correct behavior. The logging tools provide the developer with a means to log a variety of di erent data to a variety of di erent outputs. They also allow for synchronized logging of data from distributed programs. One logging output option is an...

Researches concerning Temporal Databases are being developed for more than 20 years. However, very few implemented systems are available. Several temporal data models were proposed, extending traditional data models in a way to capture also the temporal features. A feasible way of implementing a Temporal Database is using a conventional commercial database mapping the temporal data model to it....

Static integrity constraints involve only the current database state. Temporal integrity constraints involve current, past, and future database states; they can be expressed by essentially unrestricted sentences in temporal logic. Certain syntactically restricted classes of temporal constraints have been studied in their own right for considerations of feasibility or practicality; they are usua...

Most database applications manage time-referenced, or temporal, data. Temporal data management is difficult when using conventional database technology, and many contributions have been made for how to better model, store, and query temporal data. Temporal aggregation illustrates well the problems associated with the management of temporal data. Indeed, temporal aggregation is complex and among...

This essay examines how temporal data models are created and they integrated into database management systems. The well-known Relational Data Model’s extension, the Temporal Model, is discussed. application of this model in systems also researched. Historical Model adds timestamps to attributes, tuples. These two approaches make up model. It has become apparent via implementation that not all i...

The notion of deductive database is generalized by extending the rst-order language, used to formulate facts, rules and constraints, to a rst-order language involving time operators. A deductive database based on such an extended language is called temporal. In this paper, we rst introduce two additional time operators, one to reference past tenses, the other to reference future tenses. Then, t...

A prototype semiorder database used for activity recognition in multi-sensory monitoring environments is described. Activities are spatio-temporal compositions of events, which are a type of atomic semantic units for such compositions. The focus is on the temporal composition of activities from events in the presence of bounded duration of temporal uncertainty in an event occurrence. Such tempo...