Finite elements method (FEM) simulation based prediction of deformation and temperature at rolling of tubes on a pilgrim mill

3D - FEM simulation was used as an efficient tool for description of stress-deformation thermal field at rolling of tubes on a pilgrim mill.The monitored objectives comprised also Repair conditioner behaviour of working tools at this rolling.This paper assumes rolling of already pierced thick-walled blank, which passes through the pilgrim stand at

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Bioterrorism as an Imminent Security Threat

At the end of the 20th and early 21st century, there is a noticeable increase in the number of terrorist attacks and the threat of biological weapons.The potential the destructiveness of bioterrorism is such that it can now be considered as a strategic threat.On the other hand, the characteristics Brake Pulley Axle of biological weapons are an impo

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Effectiveness of blood donor questionnaire directed at risk factor for transfusion transmitted infections in Pakistani population

Background: Deferring blood donors who admit to high-risk behavior on questioning are likely to eliminate those in window period for transfusion transmitted infections (TTI).However, many questions have been implemented in some countries as part of donor history questionnaire, based on precautionary principle and not on evidence, and can result in

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