Abstract At the facility which has limited capacity, users can not always be provided service, but be passed around. In the situation that the total number of servers is constant, more facilities reduce servers of individual facility. Therefore though the distance from users to facility decreases, the loss probability increases. We consider the number of facilities and their location which mini...

The following problem arose in connection with studies of Internet web page caching. The general setting is as follows: In some fixed metric space M , k “servers” S1, . . . , Sk are given with some arbitrary initial locations in M . Requests for service at certain points σ1, σ2, σ3, . . . , σN , in M arrive over time. Immediately after request σt is received, exactly one of several mutually exc...

We know active and passive methods of a location. This article deals only with a passive location of dynamic targets. The passive optics location is suitable just for tracking of targets with mean velocity which is limited by the hardware basis. The aim of this work is to recognize plasma, particles etc. It is possible to propose such kind of evaluation methods which improve the capture probabi...

To investigate about knowledge, attitude and practice among general practitioners in Tehran, Iran. Using a short questionnaire 339 physicians was entered into the study. The subjects were approached during the 13 compulsatory postgraduate courses. The study findings indicate that 84.9% of general practitioners believe that the use of alternative therapies is mounting yearly and herbal medicine;...

To investigate about knowledge, attitude and practice among general practitioners in Tehran, Iran. Using a short questionnaire 339 physicians was entered into the study. The subjects were approached during the 13 compulsatory postgraduate courses. The study findings indicate that 84.9% of general practitioners believe that the use of alternative therapies is mounting yearly and herbal medicine;...

Most studies of facility location problems permit a to be located at any position. In practice, this may not possible. For instance, we might have limit facilities particular locations such as highway exits, close bus stops, or on empty building lots. We consider here the impact constraints performance strategy proof mechanisms for location. study six different objectives: total maximum distanc...