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PRESENCE
1998
13 years 6 months ago
1998
Two experiments investigated components of participants’ spatial knowledge when they navigated large-scale ‘‘virtual buildings’’ using ‘‘desk-top’’ (i.e., nonimm...
COMPGEOM
2004
ACM
13 years 11 months ago
2004
ACM
We revisit the problem of computing shortest obstacle-avoiding paths among obstacles in three dimensions. We prove new hardness results, showing, e.g., that computing Euclidean sh...
ICDCS
2008
IEEE
14 years 22 days ago
2008
IEEE
Distributed Denial-of-Service (DDoS) attacks have emerged as a popular means of causing mass targeted service disruptions, often for extended periods of time. The relative ease an...
IPMI
2005
Springer
13 years 11 months ago
2005
Springer
Abstract. Three dimensional medial paths or curve skeletons (CS) are an essential component of any virtual endoscopy (VE) system, because they serve as flight paths for a virtual ...
COMPGEOM
1998
ACM
13 years 10 months ago
1998
ACM
We present a new technique for constructing a data-structure that approximates shortest path maps in IRd . By applying this technique, we get the following two results on approxim...