John R . Ackerman

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Low-cost compact sensors for ultrasmall systems are a pressing need in many new applications. One potential solution is a shallow aspect ratio system using a lenslet array to form multiple undersampled subimages of a scene on a single focal plane array, where processing techniques then produce an upsampled restored image. We have investigated the(More)
One approach to flat sensor design is to use a lenslet array to form multiple subimages of a scene and then combine the subimages to recover a fully sampled image by using a superresolution algorithm. Previously, superresolution image assembly has been based on information derived from the observed scene. For lenslet arrays, we propose a new(More)
The domestic longline fishery operating off the east coast of Australia incidentally takes over 80 non-target species. A significant amount of this non-target catch is retained as byproduct. Total retained byproduct increased through the 1990s to peak at just over 1300 mt (19.6% of total retained catch) in 2002. Due to the difficult economic outlook faced(More)
One component of Oriental medicine diagnosis utilizes the palpation of the radial pulse both for internal medicine and also to help clinicians accurately choose body acupuncture treatment points. In the mid-1980s, an attempt was made to capture diagnostic information with three pressure transducers positioned bilaterally over the radial arteries in such a(More)
Overwhelming physical evidence has been present for twenty-five years that Venus is a hot new planet, which we maintain resulted from the high velocity impact (> 10 43 ergs) on Jupiter about 6,000 years ago. Up-welling radiation measurements from five independent Pioneer Venus probes all agree that Venus is radiating 250 times more energy than the Earth.(More)
We report what is to our knowledge the first demonstration of Brillouin-enhanced four-wave mixing over a long atmospheric path. Weak laser light reflected from a remote retroreflector was input to a high-gain conjugate mirror. The resulting amplified output returns to the retroreflector owing to its phase-conjugate nature. Despite atmospheric effects the(More)