Waiting in long queue is undesirable due to which in some practical situations customers become impatient and leave the system. In such cases providing additional servers can reduce long queue. This investigation deals with multi-server queueing system with additional servers and discouragement. The customers arrive in poisson fashion and are served exponentially by a pool of permanent and addi...

In this paper, we consider a multi-server queuing system in which additional servers are allowed for a longer queue to reduce the customer’s balking and reneging behavior. The customers are assumed to arrive in Poisson fashion and their service- times follow exponential distribution. The number of servers in long run depends on the queue-length. We obtain equilibrium queue size distribution. Th...

In August 1998, an interviewer for an Indonesian news weekly asked Amien Rais, a major figure in national Islamic politics and founder of the National Mandate Party (Partai Amanat Nasional), why he had altered the name of the party from the originally proposed Partai Amanat Bangsa. He replied, “We chose Partai Amanat Nasional because it would be better translated into English as National Mandat...

Encrypting data on the client-side before uploading it to cloud storage is essential for protecting users’ privacy. However client-side encryption is at odds with the standard practice of deduplication in cloud storage services. Reconciling client-side encryption with cross-user deduplication has been an active research topic. In this paper, we present the first secure cross-user deduplication ...

this paper analyzes an m/m/2 queueing system with two heterogeneous servers. both servers goes on vacation when there is no customers waiting for service after this server 1 is always available but the other goes on vacation whenever server 2 is idle. the vacationing server however, returns to serve at a low rate as an arrival finds the other server busy. the system is analyzed in the steady st...

  We consider the maximal covering location-allocation problem with multiple servers. The objective is to maximize the population covered, subject to constraints on the number of service centers, total number of servers in all centers, and the average waiting time at each center. Each center operates as an M/M/k queuing system with variable number of servers. The total costs of establishing cen...

The High-Energy Lightcurve Generator (HILIGT) is a new web-based1 tool which allows the user to generate long-term lightcurves of X-ray sources. It provides historical data and calculates upper limits from image in real-time. HILIGT utilizes twelve satellites, both modern missions such as XMM-Newton Swift, earlier facilities ROSAT, EXOSAT, Einstein or Ariel V. Together, this enables query 50 ye...

Securing and controlling workstation access to the web has never been an easy task for security professionals. Firewalls and access control list on routers alone may not bring an acceptable level of security for your organization. Even if their primary role is to reduce network traffic and improve performance, HTTP proxy servers (also called cache servers) are likely to be installed as an addit...