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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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Beyond the Rigid Body Breaking the Flutter Barrier with Fiber Optic Sensors
This is a poster for X-56A explaining how to use FOSS for feedback control of flutter.
Ultralight 3D Printed Battery Development: Breaking the Weight/Energy Battery Barrier for Small Animal Electronic Tracking Devices
Reduce the weight of current avian tracking systems for increased range and improved health monitoring at the USGS Pacific Island Ecosystems Research Center.
The Exoplanet Mass-Ratio Function From the MOA-II Survey: Discovery of a Break and Likely Peak at a Neptune Mass
We report the results of the statistical analysis of planetary signals discovered in MOA-II microlensing survey alert system events from 2007 to 2012. We determine the survey sensitivity as a function of planet star mass ratio, q, and projected planet star separation, s, in Einstein radius units. We find that the mass-ratio function is not a single power law, but has a change in slope at q approx.10(exp -4), corresponding to approx. 20 Stellar Mass for the median host-star mass of approx. 0.6 M. We find significant planetary signals in 23 of the 1474 alert events that are well-characterized by the MOA-II survey data alone. Data from other groups are used only to characterize planetary signals that have been identified in the MOA data alone. The distribution of mass ratios and separations of the planets found in our sample are well fit by a broken power-law model. We also combine this analysis with the previous analyses of Gould et al. and Cassan et al., bringing the total sample to 30 planets. The unbroken power-law model is disfavored with a p-value of 0.0022, which corresponds to a Bayes factor of 27 favoring the broken power-law model. These results imply that cold Neptunes are likely to be the most common type of planets beyond the snow line.
Breaking the Cost Curve: Applying Lessons Learned from the James Webb Space Telescope Development to Build More Cost-Effective Large Space Telescopes in the Future
This paper looks at the key programmatic and technical drivers of the James Webb Space Telescope and assesses ways to building more cost-effective telescopes in the future. The paper evaluates the top level programmatics for JWST along with the key technical drivers from design through integration and testing. Actual data and metrics from JWST are studied to identify what ultimately drove cost on JWST. Finally, the paper assesses areas where applying lessons learned can reduce costs on future observatories and will provide better insights into critical areas to optimize for cost.
Breaking the Cost Curve: Applying Lessons Learned from the James Webb Space Telescope Development
This paper looks at the key programmatic and technical drivers of the James Webb Space Telescope and assesses ways to building more cost-effective telescopes in the future. The paper evaluates the top level programmatics for JWST along with the key technical drivers from design through integration and testing. Actual data and metrics from JWST are studied to identify what ultimately drove cost on JWST. Finally, the paper assesses areas where applying lessons learned can reduce costs on future observatories and will provide better insights into critical areas to optimize for cost.
PT-Symmetry-Breaking Gyroscopes
PT-symmetric gyros will not work as originally-envisioned under a variety of conditions. Gyros with broken symmetry have advantages. Gain saturation helps by boosting sensitivity and allowing operation farther from Exceptional Point (EP). Experiments are getting better at demonstrating enhanced sensitivity. Claim: a Fast Light (FL) laser is simply one that operates at an EP.
A Bi-Exponential Repair Algorithm for Radiation-Induced Double-Strand Breaks: Application to Chromosome Aberrations
Chromosome aberrations (CAs) are one of the effects of radiation exposure and are used as a biomarker. A new simulation program, named RITCARD (Radiation induced tracks, chromosome aberrations, repair, and damage) was developed to simulate radiation-induced CA. RITCARD is used with the program RITRACKS (Relativistic Ion Tracks), which simulates the radiation tracks. The restitution kinetics algorithm presented here is a significant improvement over the one used in the first version. Simulations of radiation-induced CA were performed for several ion types and mixed irradiation fields. These simulations will be useful to help interpreting experiments of galactic cosmic rays (GCR) simulator.
Overview of NASA's Break the Ice Lunar Challenge
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Predicting Cell Death and Mutation Frequency for a Wide Spectrum of LET and Across Cell Lines from DNA Double Strand Break Clustering Inside Repair Domains
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NASA Centennial Challenge Program- Break the Ice Lunar Challenge
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Sample containerization and planetary protection using brazing for breaking the chain of contact to Mars
The process consists of two-steps, where one is intended to be prepared on Earth and the second would be executed on orbit around Mars. The latest results of this study will be described and discussed.
Breaking Down Barriers to Operationalization: NASA’s AAM Ecosystem Approach
NASA's approach to developing partnerships, sharing and communicating with stakeholders, and disseminating results of the AAM research to our ecosystem partners.