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MOBISYS
2005
ACM
14 years 7 months ago
WALRUS: wireless acoustic location with room-level resolution using ultrasound
In this paper, we propose a system that uses the wireless networking and microphone interfaces of mobile devices to determine location to room-level accuracy. The wireless network...
Gaetano Borriello, Alan L. Liu, Tony Offer, Christ...
DANCE
2002
IEEE
14 years 18 days ago
Developing Dynamic Security Policies
In this paper we define and provide a general construction for a class of policies we call dynamic policies. In most existing systems, policies are implemented and enforced by ch...
Prasad Naldurg, Roy H. Campbell, M. Dennis Mickuna...
ICDCSW
2007
IEEE
14 years 2 months ago
Using a Context Quality Measure for Improving Smart Appliances
Many Ubicomp appliances require the recognition of context. Existing context systems do not provide information about the quality of the context recognizied to the appliance at ru...
Martin Berchtold, Christian Decker, Till Riedel, T...
PERVASIVE
2007
Springer
14 years 1 months ago
Shake Well Before Use: Authentication Based on Accelerometer Data
Abstract. Small, mobile devices without user interfaces, such as Bluetooth headsets, often need to communicate securely over wireless networks. Active attacks can only be prevented...
Rene Mayrhofer, Hans Gellersen
ACSC
2004
IEEE
13 years 11 months ago
Flexible Layering in Hierarchical Drawings with Nodes of Arbitrary Size
Graph drawing is an important area of information visualization which concerns itself with the visualization of relational data structures. Relational data like networks, hierarch...
Carsten Friedrich, Falk Schreiber