Being mobile virtually

Creating Virtually Mobile Nodes for Testing Ad Hoc Routing Protocols

Testing and evaluation of mobile ad hoc network routing protocols is typically performed by simulation or in very small scale tests on real devices. Indeed, it is difficult to perform repeatable large scale tests with physically moving nodes according to a predetermined movement scenario. However, it is critical to test these protocols on real devices and networks because simulations inevitably...

Extending the Vision of Distance Education to Learning via Virtually Being There and Beyond

Does "Virtually Being There" Help? Comparing Collaborative Work between 3D and 2D Conditions

3D Collaborative Virtual Environments (CVEs) have been in the focus of CSCW research for some time. This paper presents a study comparing teamwork done in a CVE with teamwork done in a 2D remote condition and a F2F control condition. The tasks done were designed for groups without prior knowledge; they did not favor any of the environments. In some dependent variables, the 3D environment outper...

Virtually fibred Montesinos Links

William Thurston conjectured over twenty years ago that every compact hyperbolic 3manifold whose boundary is a possibly empty union of tori is finitely covered by a manifold which fibres over the circle. If true, it provides a significant amount of global information about the topology of such manifolds. The first non-trivial examples supporting the conjecture were obtained by Gabai [Ga1] (1986...

Virtually Haken Dehn--lling

We show that \most" Dehn-llings of a non-bered, atoroidal, Haken three-manifold with torus boundary are virtually Haken. 1 Results Suppose that X is a compact, oriented, three-manifold with boundary a torus T: We will pick a basis of H 1 (T) represented by simple loops ; such that = 0 in H 1 (X; Q): We call a longitude and a meridian. A slope, ; on T is the isotopy class of essential unoriented...