A Physical Database Design Method for Access Structures of Spatial Database Systems

investigating the feasibility of a proposed model for geometric design of deployable arch structures

deployable scissor type structures are composed of the so-called scissor-like elements (sles), which are connected to each other at an intermediate point through a pivotal connection and allow them to be folded into a compact bundle for storage or transport. several sles are connected to each other in order to form units with regular polygonal plan views. the sides and radii of the polygons are...

Data Structures for Spatial Database Systems

An Authorization Framework for Database Systems

Today, data plays an essential role in all levels of human life, from personal cell phones to medical, educational, military and government agencies. In such circumstances, the rate of cyber-attacks is also increasing. According to official reports, data breaches exposed 4.1 billion records in the first half of 2019. An information system consists of several components, which one of the most im...

ML-Quadtree: The Design of an Efficient Access Method for Spatial Database Systems

The aim of this paper is to present a new indexing technique that provides an efficient support for retrieving and handling spatial data. Traditionally, the mapping between layers (in a thematic point of view) and indexes structures is one to one. Each layer is associated with an index structure. In some previous work, we have presented a data structure, the FI-Quadtree that handles a set of im...

A Physical Database Design Method for Multidimensional File Organizations

This paper presents a physical database design methodology for multidimen-sional le organizations. Physical database design is the process of determining the optimal connguration of physical les and access structures for a given set of queries. Recently, many multidimensional le organizations have been proposed in the literature. However, there has been no eeort for their physical database desi...