A5047340957- Astro and Planetary Science
- Isotope Analysis in Ecology
- Planetary Science and Exploration
- Nuclear Physics and Applications
- Stellar, planetary, and galactic studies
- Space Satellite Systems and Control
- Space Exploration and Technology
- SAS software applications and methods
- Astronomical Observations and Instrumentation
- Gamma-ray bursts and supernovae
- Spacecraft and Cryogenic Technologies
- Astronomy and Astrophysical Research
- Atmospheric Ozone and Climate
- GNSS positioning and interference
- Atomic and Subatomic Physics Research
- Decision-Making and Behavioral Economics
- High-pressure geophysics and materials
- Geomagnetism and Paleomagnetism Studies
- Distributed and Parallel Computing Systems
- Optimism, Hope, and Well-being
- Error Correcting Code Techniques
- Misinformation and Its Impacts
- Geological and Tectonic Studies in Latin America
- Solar and Space Plasma Dynamics
- Advanced Wireless Communication Techniques
New Mexico Institute of Mining and Technology
2008-2024
University of California, Berkeley
2018-2024
New York University Press
2017
University of Arizona
1991-2016
Cardiopulmonary Research Science and Technology Institute
2011
University of Chicago
1929
Mitre (United States)
1928
Tata Power Solar (India)
1928
University of Canterbury
1928
Abstract The Double Asteroid Redirection Test (DART) spacecraft successfully performed the first test of a kinetic impactor for asteroid deflection by impacting Dimorphos, secondary near-Earth binary (65803) Didymos, and changing orbital period Dimorphos. A change in approximately 7 min was expected if incident momentum from DART directly transferred to target perfectly inelastic collision 1 , but studies probable impact conditions properties indicated that considerable enhancement ( β )...
We describe the Pan-STARRS Moving Object Processing System (MOPS), a modern software package that produces automatic asteroid discoveries and identifications from catalogs of transient detections next-generation astronomical survey telescopes. MOPS achieves > 99.5% efficiency in producing orbits synthetic but realistic population asteroids whose measurements were simulated for Pan-STARRS4-class telescope. Additionally, using non-physical grid population, we demonstrate can detect populations...
Abstract On 2022 September 26, the Double Asteroid Redirection Test (DART) spacecraft impacted Dimorphos, satellite of binary near-Earth asteroid (65803) Didymos. This demonstrated efficacy a kinetic impactor for planetary defense by changing orbital period Dimorphos 33 minutes. Measuring change relied heavily on coordinated campaign lightcurve photometry designed to detect mutual events (occultations and eclipses) as direct probe satellite’s period. A total 28 telescopes contributed 224...
Observations of the 2007 March 18 occultation star P445.3 (2UCAC 25823784; R = 15.3) by Pluto were obtained at high time resolution five sites across western United States and reduced to produce light curves for each station using standard aperture photometry. Global models Pluto's upper atmosphere are fitted simultaneously all resulting curves. The results these model fits indicate that structure is essentially unchanged since previous observed in 2006, leading a well-constrained...
People often decide whether to invest scarce resources—such as time, money, or energy—to improve their chances of a positive outcome. For example, doctor might utilize medicine patient’s recovery, student study few additional hours increase passing an exam. We conducted 11 studies ( N = 5,342 adults) and found evidence that people behave if they focus on the relative reduction in bad outcomes caused by such improvements. As consequence, same improvements (e.g., 10-percentage-point...
Abstract The impact of the Double Asteroid Redirection Test spacecraft into Dimorphos, moon asteroid Didymos, changed Dimorphos’s orbit substantially, largely from ejection material. We present results 12 Earth-based facilities involved in a world-wide campaign to monitor brightness and morphology ejecta first 35 days after impact. After an initial brightening ∼1.4 mag, we find consistent dimming rates 0.11–0.12 mag day −1 week, 0.08–0.09 over entire study period. system returned its...
Abstract The world’s first planetary defense test mission was carried out in late 2022 by NASA’s Double Asteroid Redirection Test (DART) mission. main DART spacecraft, which accompanied the ASI-provided LICIACube cubesat, intentionally impacted Dimorphos, smaller secondary of near-Earth object binary system (65803) Didymos, on September 26. impact released a large amount ejecta, which, combined with spacecraft’s momentum, produced observed 33 ± 1 minute period change that subsequently from...
NASA's LCROSS (Lunar Crater Observation and Sensing Satellite) mission was designed to explore the nature of previously detected enhanced levels hydrogen near lunar poles. The impacted spent upper stage launch vehicle into a permanently shadowed region surface create an ejecta plume. resultant impact crater plume were then observed by Shepherding Spacecraft as well cadre telescopes on Earth in space determine materials contained within region. became second impactor which also multiple...
Small near-Earth asteroids (>20 meters) are interesting because they progenitors for meteorites in our terrestrial collection. Crucial to understanding of the effectiveness atmosphere filtering low-strength impactors is physical characteristics these small (NEAs). In past, characterization NEAs has been a challenge difficulty detecting them prior close Earth flyby. this study we physically characterized 2-meter diameter asteroid 2015 TC25 using ground-based optical, near-infrared and radar...
Abstract On 2022 September 26, the Double Asteroid Redirection Test (DART) mission was first successful demonstration of a kinetic impactor for planetary defense. The DART utilized novel autonomous data processing pipeline architecture to quickly produce and analyze quality raw calibrated images from camera mounted on board spacecraft. Optimization allowed final 150 prior impact be delivered Investigation Team press within 15 minutes acquisition. A analysis rapid identification detector...
Asteroid 2012 TC4 is a small ($\sim$10 m) near-Earth object that was observed during its Earth close approaches in and 2017. Earlier analyses of light curves revealed excited rotation state. We collected all available photometric data from the two apparitions to reconstruct state convex shape model. show 2017 cannot be fitted with single set model parameters -- precession periods are significantly different for these sets they must have changed between or apparitions. Nevertheless, we could...
When analyzing count data (such as number of questions answered correctly), psychologists often use Poisson regressions. We show through simulations that violating the assumptions a distribution even slightly can lead to false positive rates more than doubling, and illustrate this issue with study finds clearly spurious but highly significant connection between seeing color blue eating fish candies. In additional we test alternative methods for count-data these generally do not suffer from...
When analyzing count data (such as number of questions answered correctly), psychologists often use Poisson regressions. We show through simulations that violating the assumptions a distribution even slightly can lead to false positive rates more than doubling, and illustrate this issue with study finds clearly spurious but highly significant connection between seeing blue eating fish candies. In additional we test alternate methods for count-data these generally do not suffer from same...
Motivated by the need to communicate short control messages in 5G and beyond, this paper carefully designs codes for cyclic redundancy check (CRC)-aided list decoding of tail-biting convolutional (TBCCs) polar codes. Both send a 32-bit message using an 11-bit CRC 512 transmitted bits. We aim provide careful, fair comparison error performance complexity TBCC techniques specific case. Specifically, is designed match rate (512, 43) code, optimal CRCs both are designed. The examines distance...
First we extract phenomenological values for the reduced matrix elements $〈{B}^{\ensuremath{'}}|{H}_{w}^{\mathrm{PC}}|B〉$ and $〈B|{H}_{w}^{\mathrm{PV}}|D〉$ connected with octet-baryon $B\ensuremath{\rightarrow}{B}^{\ensuremath{'}}\ensuremath{\pi}, {B}^{\ensuremath{'}}\ensuremath{\gamma}$ weak decays decuplet $D\ensuremath{\rightarrow}B\ensuremath{\pi}$. Then show at quark level that combination of $\ensuremath{\Delta}I=\frac{1}{2}$ $W$-exchange self-energy graphs explains transitions better...
view Abstract Citations (22) References (32) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Observations and a new interpretation for the delta Scuti variable star VZ Cancri. Cox, A. N. ; McNamara, B. J. Ryan, W. The pulsation characteristics of Cnc were examined, together with possibility He settling in stellar envelope. Data gathered 40 cm Tortugas telescope photometry system included comparison figures UBV HD 73938 74308. observations made February-April...
When analyzing count data (such as number of questions answered correctly), psychologists often use Poisson regressions. We show through simulations that violating the assumptions a distribution even slightly can lead to false positive rates more than doubling, and illustrate this issue with study finds clearly spurious but highly significant connection between seeing blue eating fish candies. In additional we test alternate methods for count-data these generally do not suffer from same...