Cluster-based information retrieval is one of the (IR) tools that organize, extract features and categorize web documents according to their similarity. Unlike traditional approaches, cluster-based IR fast in processing large datasets document. To improve quality retrieved documents, increase efficiency reduce irrelevant from user search. In this paper, we proposed a (K-means)-hierarchical para...

Introduction Parallel Genetic Algorithms (PGAs) have frequently been cited as an important area of research as they provide a means of rapidly developing a solution to a wide range of problems. Real-time image analysis is one of the areas of research which would particularly benefit from PGAs, however such algorithms are generally simulated on conventional computers or are designed for expensiv...

background: rna molecules play many important regulatory, catalytic and structuralroles in the cell, and rna secondary structure prediction with pseudoknots is one themost important problems in biology. an rna pseudoknot is an element of the rna secondary structure in which bases of a single-stranded loop pair with complementary basesoutside the loop. modeling these nested structures (pseudokno...

this paper focuses upon the development of an efficient method for conceptual design optimization of a satellite. there are many option for a satellite subsystems that could be choice, as acceptable solution to implement of a space system mission. every option should be assessment based on the different criteria such as cost, mass, reliability and technology contraint (complexity). in this rese...