A semi-automated single day image differencing technique to identify animals in aerial imagery.

Our research presents a proof-of-concept that explores a new and innovative method to identify large animals in aerial imagery with single day image differencing. We acquired two aerial images of eight fenced pastures and conducted a principal component analysis of each image. We then subtracted the first principal component of the two pasture images followed by heuristic thresholding to generate polygons.

Genetic and pathologic evolution of early secondary gliosarcoma.

Gliosarcoma is a subset of glioblastoma with glial and mesenchymal components. True secondary gliosarcomas (i.e.

Sub-millisecond, high stroke phase modulation using polymer network liquid crystals.

We describe the production of a high speed, and high stroke, phase modulator using a polymer network liquid crystal device. We present data showing fast response times (sub millisecond) in a device which can operate at visible wavelengths with a simple electrical addressing scheme.

Effects of monomer functionality on switchable holographic gratings formed in polymer-dispersed liquid-crystal cells.

We investigate the effects of monomer functionality on the formation and switching characteristics of holographic transmission gratings in polymer-dispersed liquid-crystal cells fabricated by using the 633 nm wavelength of an He-Ne laser. We present results for the microstructure, diffraction efficiency eta, and switching characteristics of gratings formed with acrylate monomers of functionalities ranging from 2 to 4. The microstructure and diffraction efficiency are sensitive to functionality; both improve with increasing functionality.

Switchable holographic gratings formed in polymer-dispersed liquid-crystal cells by use of a He-Ne laser.

We report on the formation of switchable holographic transmission gratings in polymer-dispersed liquid-crystal cells by use of the 633-nm wavelength of a He-Ne laser. We present results for the structure, diffraction efficiency, and switching characteristics of the gratings.

Corporate integrity agreements: making the best of a tough situation.

Healthcare providers increasingly are entering into corporate integrity agreements as part of settlements with the Federal government in fraud-and-abuse cases. Providers pursue these settlements to avoid the costs of defending themselves against fraud charges. However, the costs relating to the long-term compliance activity mandated in the settlement's corporate integrity agreement also can be substantial.