To accurately rank various web services can be a very challenging task depending on the
evaluation criteria used, however, it can play an important role in performing a better …

Today large corporations are constructing enterprise data warehouses from disparate data
sources in order to run enterprise-wide data analysis applications, including decision …

Fuzzy set theory has been extensively applied to extend various data models and resulted in
numerous contributions, mainly with respect to the popular relational model or to some …

Recently, there has been a renovated interest in functional dependencies due to the
possibility of employing them in several advanced database operations, such as data …

We investigate the implication problem for classes of data dependencies over SQL table
definitions. Under Zaniolo's “no information” interpretation of null markers we establish an …

A database is C-Armstrong for a given set of constraints in a class C if it satisfies every
constraint of the set and violates every constraint in C not implied by the set. Therefore …

Armstrong relations satisfy precisely those data dependencies that are implied by a given
set of data dependencies. A common perception is that Armstrong relations are useful in the …

Recent catastrophes and crises emphasize the necessity of an individual's and household's
preparedness for coping with these events. Previous research focuses mainly on short-term …

Keys allow a database management system to uniquely identify tuples in a database.
Consequently, the class of keys is of great significance for almost all data processing tasks …

In this article, we propose a novel model of a robust fuzzy query engine that addresses
vagueness in data and users' requirements. It aims to assist users in recommending similar …