We present an exact three-dimensional wave solution to the shearing sheet equations of motion. The existence of this solution argues against transient amplification as a route to turbulence in unmagnetized disks. Moreover, because the solution covers an extensive dynamical range in wavenumber space, it is an excellent test of the dissipative properties of numerical codes. Subject headings: accr...

DEVELOPMENT AND DESIGN OF A NEAR-FIELD HIGH-ENERGY GAMMA CAMERA FOR USE WITH NEUTRON STIMULATED EMISSION COMPUTED TOMOGRAPHY by Amy Congdon Sharma Department of Biomedical Engineering Duke University Date: November 14, 2007 Approved: ___________________________ Gregg E. Trahey, Ph.D., Co-Supervisor ___________________________ Georgia D. Tourassi, Ph.D., Co-Supervisor ___________________________...

low-power lasers are a group of lasers with a power less than 250 mw and unlike high-power lasers they have no effect on tissue temperature; they produce light-dependent chemical reactions in tissues. these lasers have analgesic features with their ability to trigger reactions that reduce pain and inflammatory mediators. low-power lasers can also be used instead of needles in acupuncture to dec...

Stimulated infrared emission from rocks: assessing a stress indicator F. T. Freund, A. Takeuchi, B. W. S. Lau, A. Al-Manaseer, C. C. Fu, N. A. Bryant, and D. Ouzounov Ecosystems Science and Technology Branch, Code SGE, NASA Ames Research Center, Moffett Field, 94035-1000, CA, USA Department of Physics, San Jose State University, San Jose, 95192-0106 CA, USA SETI Institute, Mountain View 94043, ...