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As demands for treating an access control on the client side, which is conventionally controlled by a server, increase, there is a need to treat query processing effectively and securely in an environment with limited resources. Access control that has been previously performed only focused on safety, and thus not much effort has been done to consider access control in terms of efficiency. This paper...
To meet the requirements of some intelligent vehicle monitoring system, the software integrates Global Position System (GPS), Geographic Information System (GIS) and Global System for Mobile communications (GSM) in the whole. The structure, network topology, functions, main technical features and their implementation principles of the system are introduced. Then hardware design of the vehicle terminal...
This paper describes a new type of authentication protocol and a system based on the protocol. Input transformation module is an universal service program installed in the client's. The module putout distinct output password or account for different website according to the same original user password or account and the secret website's identification code, And then, by using non-symmetric encryption,...
Spotify is a music streaming service offering low-latency access to a library of over 8 million music tracks. Streaming is performed by a combination of client-server access and a peer-to-peer protocol. In this paper, we give an overview of the protocol and peer-to-peer architecture used and provide measurements of service performance and user behavior. The service currently has a user base of over...
In this work we study the benefits of a peer- assisted approach to online backup applications, in which spare bandwidth and storage space of end- hosts complement that of an online storage service. Via simulations, we analyze the interplay between two key aspects of such applications: data placement and bandwidth allocation. Our analysis focuses on metrics such as the time required to complete a backup...
In recent years, the video streaming service has become one of the most important applications. The rapid growth of users raises a big challenge to the traditional client-server VoD service. In order to provide large scale VoD service with lower server bandwidth cost, P2P technology has been introduced to VoD service. P2P based VoD service provides the same user experience as the client-server mode...
Efficient metadata management is critical for distributed file system in cloud computing. In this paper we propose a new metadata management scheme which employs master metadata server (MMDS) and metadata look-up table server between the metadata servers and clients. The MMDS checks the state of MDSs for load-balancing, and thereby avoids hot spot. The proposed scheme significantly reduces the network...
This paper analyzes the efficiency problem of the protocol and then proposes a more efficient protocol that can reduce some hash operations and provide same security levels with an explicit key confirmation. The proposed protocol would be more suitable for mobile client-server environments.
According to the requirements of totally integrated intelligent building information system (TIIBIS), a scheme of system integration based on Web technology and OPC (OLE for Process Control) technology is put forward in the paper. The Web system based on B/S (Browser/Server) architecture can realize remote monitoring and break the localization of traditional C/S (Client/Server) architecture which...
The technology of computer and information management is used in coal reserves management in this paper. Aiming at coal reserves management features and system functional requirements in China, Coal reserves management information system based on C/S and B/S mixed-mode was constructed and implemented. In the system, VB 6.0 was used as development tool to realize Bureau of Mines module, and coal mine...
Dynamic voltage stability analysis demands a large amount of computing power because of the higher degree of model details and the longer simulated time span. In order to perform voltage stability analysis during operation - so called on-line dynamic voltage stability assessment - and to help the operator with the results to make the right decision, these analyses have to be performed rapidly within...
MMOG are very large distributed applications, sharing very large states, and supporting communication between potentially thousands of player nodes. Despite the development of many solutions to define suitable architecture and communication protocols and enabling efficient deployment of these types of applications, many issues remain. In this paper, we present a new framework to build more dynamic...
Nowadays using comprehensive Web chatting is a very popular feature in Websites. Most of the Websites use server-side scripting languages to deliver dynamic web pages to their users. The problem of implementing a chat server with these languages is that there are no long running processes to establish a firm long lived socket connection with the server. Therefore, when the server needs to send some...
Technology is advancing rapidly and the demand and expectation is getting higher, that current monolithic client-server and peer-to-peer e-learning systems can no longer tolerate. Distributed e-learning systems, on the other hand, have the potential to address many shortcomings of current e-learning systems. Distributed systems are mainly based on Web-services or alternatively the Grid. The purpose...
To observe and study the performance degradation of the application server, client-request programs and server monitoring programs are designed for different scenarios to record different parameters - five categories and 36 parameters altogether. In this paper, primary component analysis method is adopted to reduce dimension, and then multi-dimensional time series analysis method used to set up a...
This paper proposes a remote thin client system for real time multimedia streaming over VNC. A remote frame can be split as two parts, i.e. high motion part and low motion part, and transmitted through the Internet from servers to clients according to the proposed hybrid RTP protocol. A Dynamic Image Detection Scheme (DIDS) is proposed to automatically detecting the high motion part of a frame with...
The current trend towards more mobility will increasingly affect the gaming market over the next years. Location-based mobile massive multiplayer online games (MMMOG) will be a new paradigm in the gaming industry. Since building a game for a massive amount of mobile players is a challenging task, we have created a reusable architecture for location-aware mobile massive multiplayer online games. In...
This paper discusses the technical structure and utilization of remote supervisory control system. And the novel dual-parallel coupled inverted pendulum platform is constructed. Client-Server architecture is developed with the network communication for closed-loop control. The application allows performing a number of laboratory scale hard real-time control experiments, which can be remotely monitored...
This paper aims to develop the system of powerful computer laboratory class by simulation the ideal learning procedure, teachers and their students can keep in touch with each other in 2-way and immediately communication on Internet. This system can enhance the learning of computer laboratory class powerfully in 3 aspects: controlling, teaching, and evaluating on computer network technology with client/server...
This paper is about the client/server model of security with Bar-coded Identity Cards. Client and server are not just two words put together but it includes a vast range of softwares by having a backbone of client/server database. By making a client/server database we have implemented our project with a new perspective. We have developed a compact and reliable software package for the management information...
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