EEcient query processing is a critical requirement for data warehousing systems as decision support applications often require minimum response times to answer complex, ad-hoc queries having aggrega-tions, multi-ways joins over vast repositories of data. This can be achieved by fragmenting warehouse data. The data fragmentation concept in the context of distributed databases aims to reduce quer...

We develop the concept of ABC-Boost (Adaptive Base Class Boost) for multi-class classification and present ABC-MART, a concrete implementation of ABC-Boost. The original MART (Multiple Additive Regression Trees) algorithm has been very successful in large-scale applications. For binary classification, ABC-MART recovers MART. For multi-class classification, ABC-MART considerably improves MART, a...

Sufficient conditions for a topological ∗-algebra under which several Hermitian inner products are mutually equivalent are given.

In Nigeria and most Developing Countries, buying and selling of goods are done in a market. This situation is faced with diverse problems. These problems include the need for buyers and sellers to come into physical contact, the necessary need for potential buyers to visit the shop and non-flexibility in time usage. In order to overcome these problems, an On-line Shopping Mart system (EasyShop)...

With decision support systems, decision-makers analyse data in data marts extracted from production bases. The data-mart schema design is generally performed by expert designers (administrator or computer specialist). With data-driven, requirement-driven or hybrid-driven approaches, this designer builds a data-mart defining facts (analysis subjects) and analysis axes. This process, based on dat...

Data Mining is an idea based on a simple analogy. The growth of data warehousing has created mountains of data. The mountains represent a valuable resource to the enterprise. But to extract value from these data mountains, we must "mine" for high-grade "nuggets" of precious metal -the gold in data warehouses and data marts. The analogy to mining has proven seductive for business. Everywhere the...