The p-center problem (see, for example, [13]), also known as the minimax locationallocation problem, deals with the optimal location of emergency facilities. The locations of n demand points are given, and we need to locate p service facilities. The value of a candidate solution to the p-center problem is the maximum distance between a demand point to its nearest service facility. Our objective...

Intrusion detection systems are designed to provide security in computer networks, so that if the attacker crosses other security devices, they can detect and prevent the attack process. One of the most essential challenges in designing these systems is the so called curse of dimensionality. Therefore, in order to obtain satisfactory performance in these systems we have to take advantage of app...

background: killer cell immunoglobulin-like receptors (kir) are expressed on nk cells and a subset of t cells. the variable kir receptors along with their ligands, hla class i, influence risk for autoimmune and malignant diseases. objective: to investigate the kir gene profiles in relation to susceptibility to graves’ disease in patients with ophthalmopathy. methods: kir genes profiles were ana...

several demographic factors may be considered as barriers to osteoporosis prevention like high rate of illiteracy and low socioeconomic status in developing countries, there is lack of studies that assess the relationship between socioeconomic status and osteoporosis. this study was a case-control study and it was conducted in two bone mineral density centers in tehran. case group includes 163 ...