We have observed about 16 absorption lines of the ν2 SO2 vibrational band on Io, in disk-integrated 19 μm spectra taken with the TEXES high spectral resolution mid-infrared spectrograph at the NASA Infrared Telescope Facility in November 2001, December 2002, and January 2004. These are the first ground-based infrared observations of Io’s sunlit atmosphere, and provide a new window on the atmosp...

We propose a generic framework for an active leader-follower surveillance system. The system can ingest inputs from a variety of multimodal leader sensors: Radars, Automatic Identification Systems (AIS), or cameras. Rule and learning based pattern recognition techniques are performed on the leader sensors to infer unusual behaviors and events. In order to calibrate the follower PTZ cameras to t...

In order to perform true bicoordinate navigation, migratory birds need to be able to determine geographic latitude and longitude. The determination of latitude is relatively easy from either stellar or magnetic cues [1-3], but the determination of longitude seems challenging [4, 5]. It has therefore been suggested that migrating birds are unable to perform bicoordinate navigation and that they ...

Shortly after The Royal Society’s founding in 1660, Christiaan Huygens, in partnership with the Society, set out to solve the outstanding technological challenge of the day: the longitude problem, i.e. ­ nding a robust, accurate method of determining longitude for maritime navigation (Yoder 1990). Huygens had invented the pendulum clock in 1657 (Burke 1978) and, subsequently, had demonstrated m...

a simple semi-phenomenological model, which accurately predicts the dependence of thresholdcurrent for temperature of resonant-phonon three well quantum cascade laser based on verticaltransitions is offered. we found that, the longitude optical phonon scattering of thermally excitedelectrons is the most important limiting factor for thermal performance of high frequency thz qcls.in low frequenc...