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BACKGROUND AND PURPOSE Although contrast-enhanced T1-weighted MR imaging is the standard of reference for diagnosing tumor in the cerebellopontine angle, high-resolution T2-weighted imaging may show more details of the seventh and eighth cranial nerve branches, resulting in more accurate tumor volume measurements. The purpose of this study was to compare(More)
OBJECTIVE The spatial resolution in MRI is predominantly limited by the available signal-to-noise ratio (S/N). To increase the S/N, a four coil phased array consisting of bilateral pairs of semioval coils was constructed for high resolution imaging of the temporal bone and brainstem. MATERIALS AND METHODS Coil sizes of 10 x 6 and 6 x 4.5 cm were tested.(More)
A phased array coil was constructed for imaging the upper extremity vasculature for patients undergoing dialysis treatment. The phased array coil exhibits improved signal-to-noise ratio (SNR) over the body coil and allows imaging of the entire upper extremity. SNR as a function of depth was measured on a homogeneous phantom with the arm coil and compared(More)
Due to the high priority of cyber-security education, the United States Naval Academy rapidly developed and implemented a new cyber-security course that is required for all of its first-year students. During the fall semester in 2011, half of the incoming class (about 600 students) took the course through a total of 31 sections offered by 16 instructors(More)
Hydrogen production from biomass has been paid more attention for years. Processes suggested for production of hydrogen from biomass are often involved in high-temperature pyrolysis, catalytic steam reforming or enzymatic biosynthesis. These strategies, however, encounter problems of high consumption of energy, low catalyst efficiency and very limited(More)
DISCLAIMER This report was prepared as an account of work sponsored by the U.S. Government. Neither the United States nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process(More)
In spring 2011, the United States Naval Academy decided that, beginning in fall 2011, all first-year students would be required to take an introductory core course in the technical foundations of cyber security. This decision triggered our attempt to set an "academic world-record" for the development and implementation of a unique core course in six months(More)
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