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During quenching, hot rolled steel rings, especially those with a large outer diameter to wall thickness ratio, distort and develop undesired residual stresses. These phenomena are the result of three major mechanisms: metallurgical, mechanical and thermal. This paper presents the result of a comprehensive study on the heat treatment of rings by modeling via Finite Element Analysis. The simulat...

Do We Know What We Do not Know? A Response to Celine Bonnet

Universal Grammar and Chaos/Complexity Theory: Where Do They Meet And Where Do They Cross?

  Abstract The present study begins by sketching "Chaos/Complexity Theory" (C/CT) and its applica-tion to the nature of language and language acquisition. Then, the theory of "Universal Grammar" (UG) is explicated with an eye to C/CT. Firstly, it is revealed that CCT may or may not be allied with a theory of language acquisition that takes UG as the initial state of language acquisition for ...

Ramadan fasting: Do we need more evidence?

Over a billion of Muslims fast worldwide during Ramadan each year. Through this religious custom, fasting contributes to their health as well as their spiritual growth. However, available evidence regarding the health-benefits of Ramadan fasting is scarce and highly contentious. Although Islam exempts patients from fasting, many fast conceivably, and their clinical condition is prone to deterio...

Do walkable neighborhoods promote physical activity؟

The American Society of Surgeons recommends that at least 30 minutes of moderate-intensity physical activity be performed daily for at least five days a week to ensure the minimum physical health of citizens. Follow these tips because there are not enough spaces, suitable, safe and secure for physical activity and sports for citizens or very rare (1).