Huaigu Wu

Learn More
Replication has been widely used in J2EE servers for reliability and scalability. There are two properties which are important for a stateful J2EE application server. Firstly, the state of the server and the state of the backend databases should always be consistent. Secondly, each request from a client should be executed exactly once. In this paper, we(More)
In this paper we present a wireless solution for monitoring people in need of medical assistance. The application relies on the use of cell phones and inexpensive sensors and is best suited for the elderly and home-bound people. The main functions of the proposed architecture are: (1) Ability to collect signals through a wireless sensor network using(More)
A mobility-enabled architecture is usually required to facilitate the access of enterprise systems from mobile devices. Typically, mobility enabled architectures are separated in online architectures and offline architectures. The online architectures enable mobile clients to use the online model in which mobile clients access business logic and data(More)
Replication is widely used in application server products to tolerate faults. An important challenge is to correctly coordinate replication and transaction execution for stateful application servers. Many current solutions assume that a single client request generates exactly one transaction at the server. However, it is quite common that several client(More)
The goal of this poster is to describe our implementation of a newarchitecture enabling efficient integration between mobile phoneapplications and Web Services. Using this architecture, we haveimplemented a mobile shopping assistant described further. In orderto build this architecture, we designed an innovative XMLcompression mechanism to facilitate data(More)
In application server systems, such as J2EE, replication is an essential strategy for reliability and efficiency. Many J2EE implementations , both commercial and open-source, provide some replication support. However, the range of possible strategies is wide, and the choice of the best one, depending on the expected application profile, remains an open(More)
Mobile phones are becoming a new popular platform for business applications. The number of mobile business users increases and so does the need for efficient mobile data exchange and collaboration. However, a traditional business application design approach is not suitable for mobile devices because of the limited memory and connection bandwidth. This paper(More)
As the number of mobile device users increases, the need for mobile business applications development increases as well. However , such development is impeded by the limited resources available on typical mobile phones. This paper presents a context-dependent XML compression approach that enables the deployment of business applications on mobile devices.(More)