John C. Peterson

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A field site was developed in the foothills of the Sierra Nevada, California, to develop and test a multidisciplinary approach to the characterization of groundwater flow and transport in fractured rocks. Nine boreholes were drilled into the granitic bedrock, and a wide variety of instruments and methodologies were tested. Fracture properties were measured(More)
  • J B Malone, J M Housner, +5 authors Ronnie E Gillian
  • 1999
Since its founding, NASA has been dedicated to the advancement of aeronautics and space science. The NASA Scientific and Technical Information (STI) Program Office plays a key part in helping NASA maintain this important role. The NASA STI Program Office is operated by Langley Research Center, the Lead Center for NASA's scientific and technical information.(More)
All three of these professions work in the electronics area, but the level of mathematics needed by the different fields varies considerably. Semiconductor technicians need little more than ratios, elementary algebra and elementary statistics. Electronics and telecommunications technicians need more mathematics, including complex numbers, trigonometry,(More)
This paper presents the hardware platform, software, and control systems developed to field the Electric Series Compliant Humanoid for Emergency Response (ESCHER), Team VALOR's Track A entry to the DARPA Robotics Challenge (DRC) Finals. The design and assembly of ESCHER commenced 10 months prior to the Finals, leveraging and improving upon bipedal humanoid(More)
Most modern applications of Evolutionary Robotics (ER) rely upon computer-based physics simulations in order to model the behavior of the systems in question. One of the greatest challenges in the field of ER, therefore, is the development of robust, high-precision and accurate physics simulators that can model all necessary and relevant real-world(More)