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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Ultrasonic deterrents provide no additional benefit over curtailment in reducing bat fatalities at an Ohio wind energy facility
Wind energy is important for achieving net-zero greenhouse gas emissions but also contributes to global bat mortality. Current strategies to minimize bat mortality due to collision with wind-turbine blades fall broadly into two categories: curtailment (limiting turbine operation during high-risk periods) and deterrence (discouraging bat activity near turbines). Recently, there has been interest in combining these strategies to achieve greater reductions in bat fatalities than either strategy might achieve in isolation. To investigate the effectiveness of combining curtailment with ultrasonic deterrent minimization strategies, we deployed six ultrasonic deterrents at nacelle height on 16 experimental turbines at Avangrid Renewables’ Blue Creek Wind Energy Facility. We rotated between four conditions (normal operations, curtailment only, deterrent only, curtailment and deterrent) randomly assigned to four wind turbines each night between 15 June and 3 October 2017. We found that bat mortality at wind turbines was independent of wind speed. The effectiveness of ultrasonic acoustic deterrents varied between high-frequency-calling species (eastern red bats) and low-frequency-calling species (hoary bats, silver-haired bats, and big brown bats). When deterrents were active, mortality was twice as high for eastern red bats compared to the control. Conversely, deterrents had a weak dampening effect on bat mortality for low-frequency species. We found no additive effects on mortality reduction for turbines operating both curtailment and deterrents compared to either approach in isolation. Our findings suggest that ultrasonic acoustic deterrents may not be effective for both high and low frequency echolocating bats. The increase in fatalities of eastern red bats is alarming and underscores the importance of considering site- and species-specific effects of minimization solutions.
Steady-State In-Pile Nuclear Thermal Propulsion Experimental Testbed Initial Demonstration at The Ohio State University Research Reactor
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Long-lived radioactivity produced in northern Ohio concrete materials by neutron activation
Neutron activation measurements of trace element concentrations in concrete materials for use in NASA Space Propulsion Facility
International Liquid Crystal Conference, Kent State University, Kent, Ohio, August 16-20, 1965, Proceedings. Part 1.
Liquid crystal - Conference, Kent State University, August 1965, Part 1
International Liquid Crystal Conference, Kent State University, Kent, Ohio, August 16-20, 1965, Proceedings. Part II.
Liquid crystal - Conference, Kent State University, August 1965, Part II
International Liquid Crystal Conference, Kent state University, Kent, Ohio, August 16-20, 1965, Proceedings. Part III.
Liquid crystal - Conference, Kent State University, August 1965, Part III
Lewis Research Center, Cleveland, Ohio
NASA fact sheet on propulsion and electric power generation developments at Lewis Research Center, and Plum Brook research reactor facility
Cryogenic Properties of Polymers, Proceedings of the NASA-Case Conference on the Properties of Polymers at Cryogenic Temperatures, NASA Lewis Research Center and Case-Western-Reserve University, Cleveland, Ohio, April 25-27, 1967.
Cryogenic properties of polymers - NASA/Case Conference, Cleveland, April 1967
Survey and analysis of health hazards resulting from ultrafine metal and metal oxide powders at the NASA Lewis Research Center, Cleveland, Ohio
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Environmental impact statement for National Aeronautics and Space Administration Lewis Research Center, Cleveland, Ohio
The probable environmental impact and adverse effects of the Lewis Research Center are assessed. The Cleveland and Plum Brook facilities are briefly described. It is felt that the absence of harmful environmental impact from the Cleveland site is apparent, and the monitoring at the Plum Brook reactor facility shows the effectiveness of effluent controls. The probable adverse effects are considered for air, water, and noise pollution, and radioactive and hazardous waste storage and disposal; it is concluded that all emissions are maintained below Federal, and local standards. There are no appropriate alternatives to the operation of the Center, and no improvement in environmental quality would result from relocation. The relationship between local short-term productivity is briefly discussed. No adverse comment has been received from public agencies or private organizations or individuals.
Ecological effects of strip mining in Ohio
There are no author-identified significant results in this report.
Relevance of ERTS to the state of Ohio
There are no author-identified significant results in this report.
Ecological effects of strip mining in Ohio
There are no author-identified significant results in this report.
Ecological effects of strip mining in Ohio
The author has identified the following significant results. ERTS-1 imagery has identified when reclamation has proved successful, when little lateral extension has occurred in the strip mine, when water has filled an impoundment (4 - 5 acres), and detected narrow contour mines. It has been proven that the CCT contains more information than the imagery received from NASA. A stream is visible in the band 7 digital printout that is not visible in the imagery. Also narrow bodies of water between the high wall and spoils bank and small impoundments (2 - 3 acres) are observed in the digital printout and not in the imagery. Disruption maps (water and bare earth within the mined area) can be made by statistically processing the CCT (decision imagery) or mapping the digital printout with a Bendix digitizer. Reclamation maps will be produced in the near future through decision imagery. There seems little doubt that the mapping of present stripping and the monitoring of the strip mine cycle for changes are practical. Disruption mapping is now an operational capability.
Relevance of ERTS to the state of Ohio
There are no author-identified significant results in this report.
The Ohio State University Geometric and Orbital (adjustment) Program (OSUGOP) for satellite observations
A computer program, OSUGOP, developed for adjusting ground station coordinates from observations made to satellites by stations observing from the ground is outlined. The observations can be optical or ranges, and the adjustments can be performed in either the geometric or orbital mode. The program was developed in such a way that certain specific tasks can be performed without resorting to a complete solution.