The rapid emerging of mobile Internet provides new opportunities for information services. One of the service types is tied to mobile location technology that allows defining the geographical location of a mobile user. It enables the development of new class geographical information services. Location-based applications require careful development of the general architecture as well as a data f...

Location-aware applications require a geographic location service of Internet hosts. We focus on a measurement-based service for the geographic location of Internet hosts. Host locations are inferred by comparing delay patterns of geographically distributed landmarks, which are hosts with a known geographic location, with the delay pattern of the target host to be located. Results show a signif...

The network management problem is a very practical, yet complex and theoretically interesting problem. Understanding the problem requires exposure to the issues faced in managing a complex system. Given the lack of theoretical models for large-scale networks, we seek to understand the issues through data analysis. Toward this end, we are using the Access Grid (AG) as a testbed for network manag...

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We study the community structure of the multi-network of commodity-specific trade relations among world countries over the 1992-2003 period. We compare structures across commodities and time by means of the normalized mutual information index (NMI). We also compare them with exogenous community structures induced by geographical distances and regional trade agreements. We find that commodityspe...

Geographic Proximity, Trade and International Conflict/Cooperation This paper examines the interactive effect of distance and trade on international conflict and cooperation. The effect of geographic distance depends on trade, while the effect of trade varies with geographic distance. Trade reduces conflict to a greater extent when dyads are geographically close, but has a greater effect on coo...

Khresmoi aims to provide a multilingual and multimodal search and access system for biomedical information and documents, which targets three classes of user. Two of these are groups with general medical interests: the general public and general medical practitioners. The other is an example clinician group with a specific expertise: radiologists. Khresmoi targets diverse users, with: varying n...

Geographical information exists in multiple forms such as cartographical maps, images, and texts. Effective retrieval systems for geographical information are currently studied by both geospatial information scientists and library/information scientists. The two groups take quite different approaches which have rarely been explicitly compared and connected. This paper discusses the advantages a...