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Elasticity is a fundamental property of all substances occurring in nature. The theory of elasticity is concerned with the study of the response of elastic bodies to the action of forces. The importance of the application of the theory of elasticity in physics and technical mechanics involved in the stated problems from the viewpoint of mathematical analysis attracted the attention of the greatest investigators of the 20th centuries to this branch of science. This thesis is devoted to study some problems in the mechanics of elastic bodies, which might have some interesting applications in the...

In this study, the numerical phenetic method was applied on Coccinella undecimpunctata Linnaeus and its 13 aberrations. These aberrations were collected from 10 localities from Lower and Upper Egypt. The morphometric measures were used to obtain a phenogram representative of phenetic similarities and affinities among the all morphs. RAPD fingerprint profiles were generated by using five random primers on genomic DNA to characterize all the aberrations and to determine their phenetic relationships as well as to investigate the molecular markers among the aberrations genotypes. The genetic...

Hydropower seems to be an appreciable renewable source. Its use, at low head sites, can be extended in the future. This book, therefore, provides an investigation of this promising resource. The performance of low head Hydraulic Air Compressor is both experimentally and theoretically investigated for various air admission system parameters (air tube length and diameter), downcomer length and hydraulic head. The results are both presented and discussed. The losses in the whole system are classified and investigated.

The Eastern Desert of Egypt occupies 21% (c. 223000 km2) of the total area of Egypt. From the early beginnings of the last century, this desert attracted scientists, especially botanists, to study its flora, ecology and vegetation. This study (between Latitudes 30 00 N and 24 00 N) included an up-to-date checklist of its flora, quantitative analysis of its vegetation, patterns of species distribution, and a proposed phytogeographical map based on GIS analysis techniques of 500 geo-referenced sites as a preliminary step towards a general vegetation map. Classification of the vegetation yielded...