Total photonuclear cross sections have been measured in an attenuation experiment using a scintillation pair spectrometer and an x-ray spectrum with a fixed maximum energy of 90 MeV. The cross sections as a function of x-ray photon energy for beryllium, carbon, oxygen, sodium, magnesium, aluminum, silicon, sulfur, calcium, nickel, cobalt, copper, and silver show detailed structure in many cases at x-ray energies of 15-30 MeV and display a consistent trend in shapes and magnitudes. The integrated cross sections up to 35 MeV relative to the classical dipole sum rule show a monotonic increase with atomic weight. Other analyses of the total photonuclear cross sections in terms of mean energies and of the ratios of the total cross sections to photoneutron cross sections are also presented.
is a Professor and Chair of the Department of Applied Engineering and Lead Faculty for Engineering Management and Homeland Security and Safety Engineering. He is the Lead for six full time and fifty two adjunct faculty members. His department offers three undergraduate and six graduate programs and has a student population of three hundred students. Dr. Viswanathan is an educator, researcher and administrator with more than twenty-five years of industrial and academic experience encompassing engineering and environmental consulting, research and development, and technology development. His career experience includes teaching at the University level, conducting fundamental research, and developing continuing educational courses.
John Watson, National UniversityJohn Watson has been a professional technologist and researcher for over 24 years.Research/Academic: Dr. Watson teaches computer science and software engineering courses as an associate professor at National University (La Jolla, CA) while continuing research in the areas of human and machine cognition. He holds a joint doctoral degree in Education with emphasis on education technology and multicultural education from Claremont Graduate University and San
This paper examines the potential of business administration vs. computer science degrees in terms of earnings, job security, and job satisfaction. The paper focuses on earnings potential five years and ten years after the completion of business administration and computer science degrees. Moreover, the paper presents the income changes with promotion and lifetime earnings expectations of both the business administration and computer science graduates.
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