423 research outputs found
Posting of land in West Virginia and landowner attitudes regarding posting, hunting fees, and the hunter
An assessment of transportation services by older citizens in Doddridge, Hampshire, and Webster counties, West Virginia, in 1978
Campus Environment 2008: A National Report Card on Sustainability in Higher Education
Presents survey findings on national and regional trends among colleges in environmental leadership in management, academic courses in sustainability, and conservation efforts in operations. Profiles exemplary programs and notes areas for improvement
Cost-effective use of liquid nitrogen in cryogenic wind tunnels, phase 2
Cryogenic seal tests were performed and Rulon A was selected for the subject nutating positive displacement expander. A four-chamber expander was designed and fabricated. A nitrogen reliquefier flow system was also designed and constructed for testing the cold expander. Initial tests were unsatisfactory because of high internal friction attributed to nutating Rulon inlet and outlet valve plates. Replacement of the nutating valves with cam-actuated poppet valves improved performance. However, no net nitrogen reliquefaction was achieved due to high internal friction. Computer software was developed for accurate calculation of nitrogen reliquefaction from a system such as that proposed. These calculations indicated that practical reliquefaction rates of 15 to 19 percent could be obtained. Due to mechanical problems, the nutating expander did not demonstrate its feasibility nor that of the system. It was concluded that redesign and testing of a smaller nutating expander was required to prove concept feasibility
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