Composite Ballistic body armor materials has become a better body armor protection as compared to traditional steel body armor in terms of its reduction in weight and an improvement in ballistic resistance[1,2]. However, the complex response of composite materials coupled with high costs and limited amount of data from ballistic testing has lead to modeling and simulation of ballistic body armor with different grade of material becomes the best option to optimize and design the composite body armor with less weight and affordable cost. The long term goal of this research is to develop domestic knowledge, model and simulate capability of composite armors with less cost and weight. As a research methodology there was modeling and simulation by Solid work 2012 and Abaqus 6.10software were used to model and simulate the composite bullet resistant body armor respectively.

Ship-breaking is a risky, dirty, intensively labour-manipulating and hazardous industry. ‘A ship’s life lasts for an average of 25 to 30 years after which they are no longer considered safe to sail. Each year between 200 and 600 sea-going ships are dismantled worldwide. A peak is expected in 2010 when around 800 single-hull tankers will have to be phased out’ (European Commission Report, 2007). It is only few decades earlier that European countries and the United States had the sole authority of both ship-sailing and ship-breaking around the world. Therefore, they made profits in both ways. During the last two decades, developed countries has lost its sole authority over ship dismantling business because of increasing wage rate, increasing awareness towards global environment, raising safety and health consciousness among workers of developed countries. A report of the European Commission mentioned that ‘a worker on demolition site in Bangladesh and India earns just one to two dollars per day, and employers’ expenses for safety and health are negligible; while the cost in the Netherlands can be estimated at around $250 per day for a worker in the Netherlands, and $13 in Bulgaria (EU Reports, 2007).

Cross-sectional study for determining the prevalence of Ovine pasturellosis, in-vivo evaluation of the level of protective antibody titer before and after vaccination against the disease and proofing the farmers and animal health experts complaint of its cause on small ruminant production despite annual vaccination program against the disease in Adiyo district of Boka-Shuta and Buta Kebelle, Kaffa Zone. The study was conducted from July 2012 to June 2013 and the study kebelles were purposively selected based on sheep production potential, the disease’s report and farmers’ complaint on the vaccine’s inefficacy for protecting the sheep against the disease. For these, the study was designed to answer the above stated objectives with two consecutive phases, viz. prevalence study followed by in-vivo antibody titer evaluation. For prevalence study, 192 blood samples were needed and calculated, but for more accuracy 200 samples were collected randomly from previously unvaccinated sheep population (in less than 1 year) against ovine pasturellosis disease. For in-vivo evaluation, 52 blood samples were randomly collected from selected sheep population after they were vaccinated against ovine pasturellosis disease with P. multocida biotype A-vaccine by grouping them based on history of vaccination status (not vaccinated in less than 1 year against ovine pasturellosis disease) and age group (greater than 6 months of age). Sample collection, preservation and transportation were performed according to the recommended standard procedures. Laboratory analysis, Indirect haemagglutination Inhibition Test was employed at National Veterinary Institute (NVI), Ethiopia for both studies. Thus, out of 200 serum samples, 175 (87.5%) were positive. However, there were no statistical significant difference (p ≥ 0.05) between study areas, age and sex of the animals. Regarding in-vivo evaluation of the level of protective antibody titer, it was found 87.5% before vaccination and 98,1% a

The study of strokes in Africa bears at the same time an epidemiological, etiological, semiological and therapeutical interest. The studies made on the black continent [11] these early thirty years show the necessity in this sector which remains unexplored, to evaluate the incidence and the prevalence of stroke in order to elaborate programmes and research protocols adapted to our realities. However, it is difficult to have a coherent interpretation of the results of these studies because of the high variability of epidemiological clues. In black Aflica, in Nigeria [1], the prevalence of strokes was 60,67/100.000 persons. These rates of prevalence observed in Africa go against the rate reported in industrialised countries 145/100.000 persons [2] and could suggest the existence of some particularities that are special to Africa continent.

In this paper we consider some problems concerned with the isotopy classification of homeomorphisms of multiply punctured compact 2-manifolds, i.e., manifolds of the form X – ∪ m i=1 Definitions and Notation D̊ i – Pwhere X is a closed 2-manifold, {Di :1