A predictive model-based mobility tracking method, called dead reckoning, is proposed for mobile ad hoc networks. It disseminates both location and movement models of mobile nodes in the network so that every node is able to predict or track the movement of every other node with a very low overhead. This technique is applied to solve the unicast routing problem by modeling link costs using both...

Since the development of the Internet—and the emergence of computer networking as a mass medium in the mid-1990s—many organizations and institutions have experimented with Internet protocol (IP)-based communications to coordinate work and activities across geographical distance. This has been in response to growing needs to coordinate business and projects between different offices, firms, regi...

Luleå University of Technology has for the last few years deployed a netbased learning environment, mStar, to distribute courses to students independent of time and geographic distance. The mStar enviroment gives remotely attending students equal possibilities as traditionally attending students to take an active part of a course, as well as enhancing the learning experience for all students. T...

The thesis describes an agent-based model aimed to simulate those processes in which a digital object faces the risk of obsolescence, a migration process has to be performed and the most appropriate file format has to be adopted. Agents have been designed in order to monitor and control the local system where they reside and its environment. They are able to become aware of obsolescent formats ...

1: Introduction A large literature has developed that has examined the diversification strategies most suited to a real estate portfolio. Much of this debate has centred on the relative attractiveness of regional or sector diversification. However, more recent evidence would suggest that improved diversification benefits are not purely driven by either the sector or region in which a property i...

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...

In recent years, massively multiplayer online games (MMOGs) have become very popular by providing more entertainment, therefore millions of players now participate may interact with each other in a shared environment, even though these players may be separated by huge geographic distances. Peer to Peer (P2P) architectures become very popular in MMOG recently, due to their distributed and collab...

This paper present a method to model network delay for overlay network application. The network topology measurement technology and network AS information is used to build up model of network delay via AS and geographic distance. Based on global Internet measurement result, we calculated the parameters of the model. Furthermore, the model verification is done by comparing on AS-MMI protocol and...

News articles capture a variety of topics about our society. They reflect not only the socioeconomic activities that happened in our physical world, but also some of the cultures, human interests, and public concerns that exist only in the perceptions of people. Cities are frequently mentioned in news articles, and two or more cities may co-occur in the same article. Such co-occurrence often su...

Based on the following papers: 1. Review: The application of molecular genetic approaches to the study of human evolution. 2. Recovering the geographic origin of early modern humans by realistic and spatially explicit simulations. 3. Support from the relationship of genetic and geographic distance in human populations for a serial founder effect originating in Africa. 1. Introduction This lectu...