11 to 20 of 478 Results
Dec 20, 2021
Parker, Ceth W, 2021, "Genomic characterization of Parengyodontium torokii sp. nov., a biofilm-forming fungus isolated from Mars 2020 assembly facility", https://doi.org/10.48577/jpl.POWEDU, Journal of Fungi, JPL Open Repository
A fungal strain (FJII-L10-SW-P1) was isolated from the Mars 2020 spacecraft assembly facility and exhibited biofilm formation on spacecraft-qualified Teflon surfaces. The reconstruction of a five loci gene tree (ITS, LSU, SSU, RPB1 &2, and TEF1) using multi-locus sequence typing... |
Dec 16, 2021
Andrey Matsko, 2021, "Mirror-Assisted Self-Injection Locking of Laser to Whispering-Gallery-Mode Microresonator", https://doi.org/10.48577/jpl.GUC9UT, Physical Review Applied, JPL Open Repository
Self-injection locking is a dynamic phenomenon which provides passive stabilization of a laser emission frequency via resonant optical feedback. The stabilization coefficient depends on the level of the feedback and quality factor of the external resonant structure creating the f... |
Dec 16, 2021
Dan Goebel, 2021, "Demonstration of 100 kg Xenon Propellant Throughput by a Low-Power Magnetically Shielded Hall Thruster", https://doi.org/10.48577/jpl.I2RXKT, Journal of Propulsion and Power, JPL Open Repository
The Hall thruster component of the Ascendant Sub-kW Transcelestial Electric Propulsion System (ASTRAEUS) successfully demonstrated a propellant throughput of over 100 kg of xenon and demonstrated a total of 1.55 MN-s of impulse in a long-duration wear test. The thruster was opera... |
Dec 15, 2021
Joseph Lazio, 2021, "A repeating fast radio burst source in a globular cluster", https://doi.org/10.48577/jpl.6VQBEK, Astronomy & Astrophysics, JPL Open Repository
Fast radio bursts (FRBs) are exceptionally luminous flashes of unknown physical origin,reaching us from other galaxies1. Most FRBs have only ever been seen once, while othersflash repeatedly, though sporadically2,3. Many models invoke magnetically powered neutronstars (magnetars)... |
Dec 15, 2021
Rodney Anderson, 2021, "Rapid and Accurate Methods for Computing Whiskered Tori and their Manifolds in Periodically Perturbed Planar Circular Restricted 3-Body Problems", https://doi.org/10.48577/jpl.GSNRC7, Celestial Mechanics and Dynamical Astronomy, JPL Open Repository
When the planar circular restricted 3-body problem (RTBP) is peri- odically perturbed, families of unstable resonant periodic orbits break up into whiskered tori, with most tori persisting into the perturbed system. In this study, we 1) develop a quasi-Newton method which simulta... |
Dec 14, 2021
Chris Curwen, 2021, "Thin THz QCL active regions for improved continuous-wave operating temperature", https://doi.org/10.48577/jpl.TVO5UT, AIP Advances, JPL Open Repository
We compare the performance of 10 μm and 5 μm thick metal-metal waveguide terahertz quantum-cascade laser ridges operating around 2.7 THz and based on a 4-well phonon depopulation active region design. Thanks to reduced heat dissipation and lower thermal resistance, the 5 μm thick... |
Dec 14, 2021
Neil Chamberlain, 2021, "Implementing Low-Density Parity-Check Codes in the Mars Relay Network", https://doi.org/10.48577/jpl.DTJJS5, IEEE Aerospace Conference, JPL Open Repository
This paper describes the implementation of Low- Density Parity-Check (LDPC) channel codes in the Mars Relay Network; specifically in the NASA MAVEN orbiter and the ESA ExoMars Trace Gas Orbiter. LDPC codes, also known as Gallager codes, were invented in the early 1960s. At the ti... |
Dec 14, 2021
Dustin Buccino, 2021, "Performance of Earth Troposphere Calibration Measurements with the Advanced Water Vapor Radiometer for the Juno Gravity Science Investigation", https://doi.org/10.48577/jpl.JAQMHH, Radio Science, JPL Open Repository
The performance of an atmospheric water vapor radio path delay measurement and correction is reported using observations of the Juno Spacecraft during gravity field mapping of Jupiter. The Juno Gravity Science instrument measures the Doppler shift on the radio signals between the... |
Dec 14, 2021
Posselt, Derek J, 2021, "Using Ensemble Data Assimilation to Explore the Environmental Controls on the Initiation and Predictability of Moist Convection", https://doi.org/10.48577/jpl.TEUGOM, Journal of the Atmospheric Sciences, JPL Open Repository
Atmospheric deep moist convection has emerged as one of the most challenging topics for numerical weather prediction, due to its chaotic process of development and multi-scale physical interactions. This study examines the dynamics and predictability of a weakly organized linear... |
Dec 13, 2021
Lee, Kyo, 2021, "A Visual Analytics Framework for Distributed Data Analysis Systems", https://doi.org/10.48577/jpl.ZRIEVU, Big data 2021, JPL Open Repository
This paper proposes a visual analytics frameworkthat addresses the complex user interactions required througha command-line interface to run analyses in distributed dataanalysis systems. The visual analytics framework facilitates theuser to manage access to the distributed server... |
