Recently, S. Nayar introduced a parabolic imaging system that has a field of view of a full hemisphere or more. When used with a video camera the result is an omni-directional video stream that captures everything going around it. In the VAST Lab at Lehigh, we have been experimenting with these cameras, developing new variants, and developing omni-directional vision applications. We present an ...

Medium Access Control in Ad Hoc Networks with Omni-directional and Directional Antennas

BOOK Twenty-Sixth Annual Meeting Omni Shoreham Hotel, Washington, DC 20008 June 20 – 24, 2004

Decentralized state estimation is one of the most fundamental components autonomous aerial swarm systems in GPS-denied areas; yet, it remains a highly challenging research topic. Omni-swarm, decentralized omnidirectional visual–inertial–ultrawideband (UWB) system for swarms, proposed this article to address niche. To solve issues observability, complicated initialization, insufficient accuracy,...

A generalized Courant algebroid structure is defined on the direct sum bundle DE ⊕ JE, where DE and JE are the gauge Lie algebroid and the jet bundle of a vector bundle E respectively. Such a structure is called an omni-Lie algebroid since it is reduced to the omni-Lie algebra introduced by A.Weinstein if the base manifold is a point. We prove that any Lie algebroid structure on E is characteri...

Without the factor of 1 2 , this would be the semidirect product Lie algebra for the usual action of gl(n,R) on R. With the factor of 1 2 , the bracket does not satisfy the Jacobi identity. Nevertheless, it does satisfy the Jacobi identity on many subspaces which are closed under the bracket. In fact, we will see that any Lie algebra structure on R is realized on such a subspace. If B is any bi...

This paper reports narrowband and wideband results derived by propagation modeling at 60 GHz for indoor WLAN applications. A multi-ray model is proposed and verified through a simulation process. The propagation in the site-specific environment can be described using 4-5 rays without reducing the accuracy of the results. RMS delay spread varies with distance from 0.57 ns up to 2.32 ns. Coherenc...