Experienced Chief Scientist and Deputy Director. Advanced Technology Developer. Nuclear detection expert. Decades of experience developing technology and methods for addressing the clandestine nuclear attack issue, other nuclear detection problems and advanced development for multiple non-nuclear problems. The subdirectories of this page archive a number of short papers by Robert August on the basics of detecting weak radioactive sources in the environment, most significantly SNM (special nuclear material) and nuclear devices. Dr. August has over a quarter-century experience in this field and these results are widely recognized and often requested. They are compiled here for easy reference and download.