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Hussien N.S.,Cario University | Hussien N.S.,Taif University | Abo-Dahab S.M.,Taif University | Al-Bokamy M.,Taif University
Journal of Computational and Theoretical Nanoscience | Year: 2014

In this paper, the deformation and the corresponding stresses in an elastic rotating about its axis with a constant angular velocity is investigated. The present investigation is concerned with the effect of rotation and magnetic field on an infinite circular cylinder subjected to certain boundary conditions. An analytical procedure for evaluation of thermal stresses, displacements, and temperature in rotating cylinder subjected to thermal load along the radius is presented. Effect of rotation and magnetic field are analyzed theoretically and computed numerically. Numerical results have been given and illustrated graphically. Comparison was made with the results obtained in the presence and absence of rotation and magnetic field. The results indicate that the effect of rotation and magnetic are very pronounced. © 2014 American Scientific Publishers.

Li J.,Shanghai JiaoTong University | Dai B.,Shanghai JiaoTong University | Xiao K.,Shanghai JiaoTong University | Hassanien A.E.,Cario University
Communications in Computer and Information Science | Year: 2012

In this paper, we introduce an image segmentation framework which applies automatic threshoding selection using fuzzy set theory and fuzzy density model. With the use of different types of fuzzy membership function, the proposed segmentation method in the framework is applicable for images of unimodal, bimodal and multimodal histograms. The advantages of the method are as follows: (1) the threshoding value is automatically retrieved thus requires no prior knowledge of the image; (2) it is not based on the minimization of a criterion function therefore is suitable for image intensity values distributed gradually, for example, medical images; (3) it overcomes the problem of local minima in the conventional methods. The experimental results have demonstrated desired performance and effectiveness of the proposed approach. © Springer-Verlag Berlin Heidelberg 2012.

Mohamed H.A.,Taif University | Mohamed H.A.,Cario University | Al-Sodany Y.M.,Taif University | Al-Sodany Y.M.,Kafr El Sheikh University | And 5 more authors.
Life Science Journal | Year: 2013

The present investigation aims to study the abundance and distribution of some flora and fauna, from intertidal and shallow subtidal waters in four different sites along the Red Sea coast of Jeddah, KSA Thirty one species were collected during this study. Mean values of density and relative abundance for the collected species were tabulated. The data declared that site 1 is characterized by a noticeable higher total number of individuals with high values of species richness and Shannon diversity in comparison to other sites. Sargassum sp. shows the highest percentages of all collected species in site 1 while Balanus sp. is the highest of fauna. In site 4 which is the more polluted site, Mytilus galloprovincialia is the more dominant species, this may indicate that this species could be considered as a bioindicator for pollution and other human activities.

Ghaly A.E.,Dalhousie University | Mahmoud N.,Cario University | Dave D.,Dalhousie University
American Journal of Biochemistry and Biotechnology | Year: 2012

Two thirds of the world's populations are suffering from protein malnutrition and about 36 million people die every year due to hunger. Expansion of present agriculture practices into marginal land is not expected to solve the problem of increasing the food supply. New methods of feeding the ever increasing world population must be developed. The aim of the study was to evaluate the usefulness of the dandelion leaves as a source of supplemental protein. Protein was extracted from the dandelion leaves by blending them after pH and moisture adjustment, squeezing the resultant pulp through filter press and coagulating the filtrate with acid and heat. The effects of pH, moisture content, pressure and temperature on the ex-tractability and quality of protein were investigated. A mass balance was performed on dry matter and protein contents during the extraction steps. Proximate analysis was performed on the extracted leaf protein and the amino acid profile of the protein curd was determined. The best results of the protein dissolution during the blending step were obtained at pH of 8.25 and moisture content of 96%. Firm protein curd with light green chalky color was obtained at 3.5 pH and 80°C. The protein content of dandelion leaves was 4.70% while the protein content of the curd was 15.93% on wet basis and 55.43% on a dry basis. The best leaf protein could be obtained from the young leaves in good conditions. The results showed that dandelion leaves offer a good source of supplementary protein compared to vegetable and fruits. The amino acid composition of dandelion protein seems to be better than most seed proteins and compares favorably with animal proteins. The protein cake at a pH of 4 had the keeping quality of cheese. Drying the protein cake did not impair the nutritional value but made it hard, dry and gritty. The non extractable protein remained in the fiber and liquor, both have economic values as feed for ruminants and growth medium for microorganisms, respectively. © 2012 Science Publication.

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