This paper introduces a visual language for active database systems. We present a new approach to database programming based on visual active language that allows us to describe active rules in a graphical way. The resulting visual language can be transformed into a textual one. In addition, an active system can be represented with several diierent graphs showing the interactions of rules and t...

In this paper we present a rule-based database language known as CDOL (Comprehensive, Declarative Object Language) that is an integration of deductive, object-oriented and active database technology. CDOL provides sublanguages for the expression of derived data, constraints, updates and active rules. The rule-based query language of CDOL provides an expressive approach to extend the stored data...

Active database systems have received increasing interest from both research and industrial communities. However, trigger conditions in the active rules are often dif-cult to specify, especially as the events and/or conditions complexities increase. To remedy this problem, we propose an active database system that supports rules with conceptual terms, approximate operators, and complex events. ...

Delta abstractions are introduced as a mechanism for managing database states during the execution of active database rules. Delta abstractions build upon the use of object deltas, capturing changes to individual objects through a system-supported, collapsible type structure. The object delta structure is implemented using object-oriented concepts such as encapsulation and inheritance so that a...

Database outsourcing is an idea to eliminate the burden of database management from organizations. Since data is a critical asset of organizations, preserving its privacy from outside adversary and untrusted server should be warranted. In this paper, we present a distributed scheme based on storing shares of data on different servers and separating indexes from data on a distinct server. Shamir...

We give a method for improving the eeciency of condition evaluation during rule processing in active database systems. The method derives, from a rule condition, two improved conditions that can be used in place of the original condition when a previous value (true or false) of the original condition is known. The derived conditions are more eecient than the original condition because they repl...

There have been many recent research efforts on temporal databases for managing current and historical data and on active databases for monitoring real-world events as well as data conditions/constraints by rules and triggers. However, the specification and management of temporal rules in active object-oriented databases has not been investigated. This paper deals with the specification and man...

Objective: Accurate scientific planning and societal macro policies require reviewing and evaluating research output. Scientometrics offers a valuable approach for assessing the activity of journals that publish a majority of scientific productions. This study aims to analyze the scientific activity of the Iranian Rehabilitation Journal (IRJ) by examining its publication history in the Scopus d...