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Articles 1 - 7 of 7
Full-Text Articles in Physical Sciences and Mathematics
An Egocentric Spatial Data Model For Intelligent Mobile Geographic Information Systems, Christopher E. Frank
An Egocentric Spatial Data Model For Intelligent Mobile Geographic Information Systems, Christopher E. Frank
Electronic Theses and Dissertations
Individuals in unknown locations, such as utility workers in the field, soldiers on a mission, or sightseeing tourists, share the need for an answer to two basic questions: "Where am I?" and "What is in front of me?Because such information is not readily available in foreign locations, aids in the form of paper maps or mobile GISs, which give individuals an all-inclusive view of the environment, are often used. This panoptic view may hinder the positioning and orienteering process, since people perceive their surroundings perspectively from their current position. In this thesis, I describe a novel framework that resolves this …
Mobicom Poster: Evaluating Location Predictors With Extensive Wi-Fi Mobility Data, Libo Song, David Kotz, Ravi Jain, Xiaoning He
Mobicom Poster: Evaluating Location Predictors With Extensive Wi-Fi Mobility Data, Libo Song, David Kotz, Ravi Jain, Xiaoning He
Dartmouth Scholarship
A fundamental problem in mobile computing and wireless networks is the ability to track and predict the location of mobile devices. An accurate location predictor can significantly improve the performance or reliability of wireless network protocols, the wireless network infrastructure itself, and many applications in pervasive computing. These improvements lead to a better user experience, to a more cost-effective infrastructure, or both. Location prediction has been proposed in many areas of wireless cellular networks as a means of enhancing performance, including better mobility management, improved assignment of cells to location areas, more efficient paging, and call admission control. To the …
Making The Key Agreement Protocol In Mobile Ad Hoc Network More Efficient, Gang Yao, Kui Ren, Feng Bao, Robert H. Deng, Dengguo Feng
Making The Key Agreement Protocol In Mobile Ad Hoc Network More Efficient, Gang Yao, Kui Ren, Feng Bao, Robert H. Deng, Dengguo Feng
Research Collection School Of Computing and Information Systems
Mobile ad hoc networks offer convenient infrastructureless communications over the shared wireless channel. However, the nature of mobile ad hoc networks makes them vulnerable to security attacks, such as passive eavesdropping over the wireless channel and denial of service attacks by malicious nodes. To ensure the security, several cryptography protocols are implemented. Due to the resource scarcity in mobile ad hoc networks, the protocols must be communication efficient and need as less computational power as possible. Broadcast communication is an important operation for many application in mobile ad hoc networks. To securely broadcast a message, all the members in the …
User Controlled Privacy Protection In Location-Based Services, Anuket Bhaduri
User Controlled Privacy Protection In Location-Based Services, Anuket Bhaduri
Electronic Theses and Dissertations
The rapid development of location-determining technologies has enabled tracking of people or objects more accurately than ever before and the volume and extent of tracking has increased dramatically over time. Within the broader domain of tracking technologies, location-based services (LBS) are a subset of capabilities that allow users to access information relative to their own physical location. However, the personal location information generated by such technologies is at risk of being misused or abused unless protection capabilities are built into the design of such systems. These concerns may ultimately prevent society from achieving the broad range of benefits that otherwise …
Computational Markets To Regulate Mobile-Agent Systems, Jonathan Bredin, David Kotz, Daniela Rus, Rajiv T. Maheswaran, Cagri Imer, Tamer Başar
Computational Markets To Regulate Mobile-Agent Systems, Jonathan Bredin, David Kotz, Daniela Rus, Rajiv T. Maheswaran, Cagri Imer, Tamer Başar
Dartmouth Scholarship
Mobile-agent systems allow applications to distribute their resource consumption across the network. By prioritizing applications and publishing the cost of actions, it is possible for applications to achieve faster performance than in an environment where resources are evenly shared. We enforce the costs of actions through markets where user applications bid for computation from host machines. \par We represent applications as collections of mobile agents and introduce a distributed mechanism for allocating general computational priority to mobile agents. We derive a bidding strategy for an agent that plans expenditures given a budget and a series of tasks to complete. We …
Context-Sensitive Resource Discovery, Guanling Chen, David Kotz
Context-Sensitive Resource Discovery, Guanling Chen, David Kotz
Dartmouth Scholarship
This paper presents the “Solar” system framework that allows resources to advertise context-sensitive names and for applications to make context-sensitive name queries. The heart of our framework is a small specification language that allows composition of “context-processing operators” to calculate the desired context. Resources use the framework to register and applications use the framework to lookup context-sensitive name descriptions. The back-end system executes these operators and constantly updates the context values, adjusting advertised names and informing applications about changes. We report experimental results from a prototype, using a modified version of the Intentional Naming System (INS) as the core directory …
Prescription Express System, Chia-Yu Tsai
Prescription Express System, Chia-Yu Tsai
Theses Digitization Project
The Prescription Express System is a software program that was developed with express service of health care in mind. The purpose was to provide easy access for doctors to check on upcoming appointments with patients and send prescriptions via wireless network directly to the pharmacy to provide faster service.