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Java offers the basic infrastructure needed to integrate computers connected to the Internet into a seamless parallel computational resource: a flexible, easily-installed infrastructure for running coarse-grained parallel applications on numerous, anonymous machines. Ease of participation is seen as a key property for such a resource to realize the vision(More)
The Alexandria project has been initiated to build a digital library for map and satellite images. Designed for content-based retrieval, the relevant information in each image is encoded in the form of a multi-dimensional feature vector. Though representing images by feature vectors ~eatly facilitates user queries, indexing these vectors degrades(More)
—Research in wireless mesh networks have been growing in recent years. Many testbeds have been created to study networking protocols in wireless mesh networks. In this work, we describe QuRiNet, an outdoor wide-area wireless mesh network deployed in a natural reserve. We describe various research efforts that have been leveraging the QuRiNet testbed.(More)
Wireless Mesh Networks are being deployed everywhere as an alternative to broadband connections. Their ease of setup and large coverage are attractive attributes. However, there are very few performance studies of mesh networks especially in the multiple channel arena. Our objective is to study the performance and characterize the 802.11b wireless mesh(More)
This paper presents a summary of some of the work-in-progress within the Alexandria Digital Library Project. In particular, we present scalable methods of locating information at diierent levels within a distributed digital library environment. Starting at the high level, we show how queries can be routed to appropriate information sources. At a given(More)
—Multi-radio nodes in wireless mesh networks introduce extra complexity in utilizing channel resources. Depending on the configuration of the radios, bad mappings between radio to wireless frequencies may result in sub-optimal network topologies. Static channel assignments in wireless mesh networks have been studied in theory and through simulation but very(More)
—Wireless simulators provide full control to researchers in investigating traffic flow behavior, but do not always reflect real-world scenarios. Although previous work pointed out such shortages are due to the limitation of radio propagation models in the simulators, it is still unclear how these imperfect models affect network behavior and to what degree.(More)
This extended abstract describes our experiences in the deployment of QuRiNet, a wireless mesh network at the Quail Ridge Natural Reserve. Quail Ridge boasts 2,000 acres of untouched wilderness on a peninsula of Lake Berryessa, California. In deploying a mesh network at Quail Ridge, we seek to assist ecological research in the area by providing a(More)
— Multi-hop Wireless Mesh Networks (WMNs) are becoming a popular alternative to extending the typical Wireless Local Area Networks (WLANs) we use today. Mesh networks have the advantage of low-cost incremental deployment, where wireless routers can be added at any time, in proportion to the number of users. In addition, the lack of a wired infrastructure(More)