The ability to predict with some accuracy a given solid rocket motor’s performance before undertaking one or several costly experimental test firings is important. On the numerical prediction side, as various component models evolve, their incorporation into an overall internal ballistics simulation program allows for new motor firing simulations to take place, which in turn allows for updated ...

It is generally believed that gastric emptying of solids is regulated by a coordinated motor pattern between the antrum and pylorus. We studied the role of the vagus nerve in mediating postprandial coordination between the antrum and pylorus. Force transducers were implanted on the serosal surface of the body, antrum, pylorus, and duodenum in seven dogs. Dogs were given either a solid or a liqu...

* Technical Program Manager † Research Programmer ‡ Visiting Scholar § Research Scientist ¶ Associate Professor of Aeronautical and Astronautical Engineering, University of Illinois at Urbana-Champaign # Postdoctoral Research Associate ** Senior Research Scientist Copyright  2002 by Center for Simulation of Advanced Rockets. Published by the American Institute of Aeronautics and Astronautics, ...

An interest in plume spectroscopy led to the development of a labscale Hybrid Rocket Facility at the University of Arkansas at Little Rock (UALR). The goal of this project was to develop a reliable, consistent rocket motor testbed for the development of plume spectroscopy instrumentation. Hybrid motor technology was selected because it has proven to be safe and inexpensive to operate. The proje...

objectives: the aim of this study was to determine the effect of perceptual-motor training on motor skills of normal preschool children (aged 4-6 years) in esfahan city. methods: this was a quasi-experimental study with intervention and control groups. each group included 30 normal preschool children aged 4 to 6 years. they were selected randomly children of intervention group one empowering ch...

This study is concerned with the reduction of ripple in thrust force produced a linear Brushless Direct Current Motor (BLDC). To reduce ripples generated force, different methods such as structural solutions are applied both control part and production phase motor. In this study, skew application, which one mechanical methods, proposed. For reason, changes BLDC motor surface magnet-placed trans...

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