In this paper a single server queuing production system is considered which is subject to gradual deterioration. The system is discussed under two different deteriorating conditions. A planning horizon is considered and server which is a D/M/1 queuing system is gradually deteriorates through time periods. A maintenance policy is taken into account whereby the server is restored to its initial ...

This paper deals with finite capacity single server queuing system with vacations. Vacation starts at rate nu if the system is empty. Also the server takes another vacation if upon his arrival to the system, finds the system empty. Customers arrive in the system in Poisson fashion at rate lamda0 during vacation, faster rate lamdaf during active service and slower rate lamdas during the breakdow...

In this paper, we investigate a single-server Poisson input queueing model, wherein arrivals of units are in bulk. The arrival rate of the units is state dependent, and service time is arbitrary distributed. It is also assumed that the system is subject to breakdown, and the failed server immediately joins the repair facility which takes constant duration to repair the server. By using suppl...

We study the setting in which a user stores encrypted documents (e.g. e-mails) on an untrusted server. In order to retrieve documents satisfying a certain search criterion, the user gives the server a capability that allows the server to identify exactly those documents. Work in this area has largely focused on search criteria consisting of a single keyword. If the user is actually interested i...

This paper addresses the problem of cache consistency in a client-server database environment. We assume the server provides shared database access for multiple client workstations and that client workstations may cache a portion of the database. Our primary goal is to investigate techniques to maintain the consistency of the client cache and to improve server throughput. We propose a new cache...

In many service systems, customers may choose to abandon the system if their wait is deemed excessive. In an observable queue, the server is always aware that an abandoning customer has left the queue. However, in unobservable queues, the fact that the customer has abandoned the system may be unbeknownst to the server. Not only are the abandoning customers unobservable to the server, the server...

In active anycast where accesses from the clients are distributed among the servers by an active router, the information used for selecting the adequate server from the viewpoint of improvement of response time for clients is important. Response time perceived by clients consists of processing delay at the server and network delay. To realize good selection of servers, both of server processing...

Measurements on a high-performance switched Ethernet system are presented that reveal new insights into the statistical nature of le server and web server traÆc. Both le sizes and data requested from the web server are shown to match well a truncated Cauchy distribution. This is a distribution with heavy tails similar in nature to the commonly used Pareto distribution but with a much better t o...

Move the sound source identified by id on the machine indicated by server in the given heading at the given velocity for the given period of time. For spatial audio, the heading is a polar vector of the (azimuth, elevation) form. For panned audio, the heading is a slope of the form depth/width. The velocity is given in meters per second. Time is given in seconds. Doppler shift is also computed ...