We consider a typical wireless data access scenario: a number of mobile clients are interested in a set of data items kept at a common server. A client sends a request to inform the server of its desired data item while the server replies in the common broadcast channel. To study the energy consumption characteristics in such a scenario, we first define a power aware utility function. Based on ...

In this paper we propose a generic framework for efficient retrieval of audiovisual media based on its audio content. This framework is implemented in a client-server architecture where the client application is developed in Java to be platform independent whereas the server application is implemented for the PC platform. The client application adapts to the characteristics of the mobile device...

The WMS-WCS client that we present here has the ability to integrate a sequence of requested static images in the form of an animated film. It allows the selection among predefined films and among the different available styles of visualization. Likewise, it has the typical player functions and it is possible to discard unwanted frames. A WCS client has also been integrated to the WMS browser. ...

The Domain Name System (DNS) is a critical component of the Internet infrastructure as it maps human-readable hostnames into the IP addresses the network uses to route traffic. Yet, the DNS behavior of individual clients is not well understood. In this paper, we present a characterization of DNS clients with an eye towards developing an analytical model of client interaction with the larger DNS...

This study elucidated Japanese home care nurses’ experiences of supporting clients and families with anxiety. We interviewed 10 registered nurses working in home care agencies and analyzed the data using grounded theory to derive categories pertaining to the nurses’ experiences of providing care. We conceptualized nurses’ approaches to caring for anxiety into three categories: First, they attem...

New challenging deployment scenarios are accommodating portable devices with limited and heterogeneous capabilities that roam among wireless access localities during service provisioning. That calls for novel middlewares to support different forms of mobility and connectivity in wired-wireless integrated networks, to provide runtime service personalization based on client characteristics, prefe...

In this paper, we propose a novel adaptive admission control algorithm, in which a client is admitted for service by a multimediaserver only if the extrapolation from the past measurements of the storage server performance characteristics indicate that the service requirements of all the clients can be met satisfactorily. Each client may request the retrieval of a variable bit rate (VBR) encode...

This paper presents traffic analyses for Xbox System Link traffic. The goal of this analyses is to create a traffic model for Xbox traffic that can be used for network evaluation purposes. Traffic characteristics observed were: packet length, packet inter-arrival times, packets per second (PPS) and data rates. We found that System Link traffic is very periodic. Servers send update packets every...

The ambition of any e-voting system is to reproduce, in an electronic environment, the characteristics of physical voting systems, such as accuracy, democracy, privacy and veri ability. REVS is an Internet e-voting system based on blind signatures and designed to be robust in distributed and faulty environments. However, the execution of REVS client system, used by voters, can be tampered by in...

This paper describes our work on the implementation and empirical evaluation of a client-side server selection framework for accessing replicated web services. The framework, which incorporates five representative server selection policies, was evaluated in the context of accessing a real-world replicated service, with four replicas distributed over three different continents. Our empirical res...