Lifetime of a1−Level inSm152

Improving Lifetime of Strategic Information Network in Oil Supply Chain

Today, information networks play an important role in supply chain management. Therefore, in this article, clustering-based routing protocols, which are one of the most important ways to reduce energy consumption in wireless sensor networks, are used to optimize the supply chain informational cloud network. Accordingly, first, a clustering protocol is presented using self-organizing map neu...

Improving Lifetime of Strategic Information Network in Oil Supply Chain

Today, information networks play an important role in supply chain management. Therefore, in this article, clustering-based routing protocols, which are one of the most important ways to reduce energy consumption in wireless sensor networks, are used to optimize the supply chain informational cloud network. Accordingly, first, a clustering protocol is presented using self-organizing map neu...

Lifetime risk assessment of Radium-226 in drinking water samples

Background: One of the most significant radionuclides in natural drinking waters is 226Ra and its decay products. It is potential of health problems, including cancer risk. In this study, the effect of 226Ra concentration in 28 drinking water samples collected from the North Guilan province was investigated. Materials and Methods: The activity concentrations of 226Ra were measured by using of r...

An Evaluation of the Systems Reliability Using Fuzzy Lifetime Distribution

A lifetime of learning.

Twenty-five years ago, when I finished my surgical training and obtained certification by the American Board of Surgery and the American Board of Colon and Rectal Surgery, I felt relief and told myself that my education was finally finished. How wrong I was! I do know surgeons who, although my contemporaries, quite literally "finished" their education after residency, and I can see how dramatic...