The Old and the Restless: The Egyptians and the Scythians in Herodotus\u27 Histories

The first part of this project focuses on the differences and similarities between the Egyptians and Scythians that occur in Herodotus\u27 work. The second part will examine how this contrast helps the reader understand the many other cultures discussed in the book, focusing on the Persians in particular, and what these similarities and differences mean to Herodotus in terms of the Histories as a whole

Validation of the Articulated Total Body Model Data Set Describing the Large Advanced Dynamic Anthropomorphic Manikin

Recent cut-backs in Department of Defense spending have presented a need to augment full-scale ejection seat testing with computer simulation. To this end, the U.S. Air Force\u27s Armstrong Laboratory has developed a data set describing the Advanced Dynamic Anthropomorphic Manikin (ADAM) for use in conjunction with the Articulated Total Body (ATB) model for the purpose of simulating the dynamics of the ADAM during sled track ejections. The purpose of this thesis is to validate the ADAM data set by graphically comparing ADAM joint angular displacements calculated by the ATB model with those measured during ejection seat sled track tests. The tests used for these comparisons are the ADAM/MASE Integration Tests (AMIT) 79E-G2A and 79E-F1. Results of initial comparisons indicate oversimplifications in original joint resistive torque function calculations. These oversimplifications result in excessive joint oscillations as simulated by the ATB model. A certain amount of success in damping these joint oscillations is realized as a result of modifications to these joint resistive torque functions. Overall, the ATB model accurately simulates ADAM motion for the first 400 milliseconds of each simulation. Beyond this time, simulation versus AMIT 79E-Fl test results correlate relatively well. Nonetheless, excessive oscillations in certain joints continue to persist

The isotopic composition of cosmic rays with 5 is less than or equal to z which is less than or equal to 26

Results obtained from a high altitude balloon flight from Thompson, Canada in August, 1973 are reported. The instrument consisted of a spark chamber, a Lucite Gerenkov counter and thirteen layers of scintillators. For heavy particles the Cerenkov-range method of analysis was used to determine the mass of particles energetic enough to produce a Cerenkov signal and then stop in the layered scintillators. The data appear to be consistent with current cosmic-ray propagation models. Using a simple exponential path length propagation model this data is extrapolated to the cosmic-ray source and some implications of the data are discussed as to the nature of the source