The present investigation deals with the bulk arrival M/G/1 retrial queue with impatient customers and modified vacation policy. The incoming customers join the virtual pool of customers called orbit if they find the server being busy, on vacation or in broken down state otherwise the service of the customer at the head of the batch is started by the server. The service is provided in k</em...

In recent years, there has been considerable interest among people to use short message service (SMS) as one of the essential and straightforward communications services on mobile devices. The increased popularity of this service also increased the number of mobile devices attacks such as SMS spam messages. SMS spam messages constitute a real problem to mobile subscribers; this worries telecomm...

Adjusting to the U.S. Quickly and Comfortably I. Explore Get familiar with your environment. Explore the campus and Ann Arbor on foot or by bus. ● U-M busses (blue busses) are free. Public busses (AATA) are free with your M-Card. ❍ U-M bus routes and schedules [1] ■ AATA bus routes and schedules [2] ■ You can sign up for a guided campus tour [3] or use the Campus Tour Map [4] to take a self-gui...

due to the increasing importance of internet banking and the critical actions taken by banks in order to offer internet banking services in iran and also according to the increasing number of customers using internet banking services, it is essential for bank marketers to understand internet banking customers better. only through this comprehension the marketers are able to develop strategies a...

The Ordinal Register Machine (ORM) is one of several different machine models for infinitary computability. We classify, by complexity, the sets that can be decided quickly by ORMs. In particular, we show that the arithmetical sets are exactly those sets that can be decided by ORMs in times uniformly less than ω. Further, we show that the hyperarithmetical sets are exactly those sets that can b...

During the last years, increased competition among banks has caused many developments in banking experiences and technology, while leading to even more churning customers due to their desire of having the best services. Therefore, it is an extremely significant issue for the banks to identify churning customers and attract them to the banking system again. In order to tackle this issue, this pa...