Browsing by Title
Now showing items 85467-85486 of 114804
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The R & D factor in international trade and international investment of United States industries
([Cambridge, Mass., M.I.T.], 1966) -
R & D systems dynamics in federally regulated industries
([Cambridge, M.I.T.], 1973) -
The R -Process Alliance: Discovery of a Low- α , r -process-enhanced Metal-poor Star in the Galactic Halo
(American Astronomical Society, 2019-04)All rights reserved. A new moderately r-process-enhanced metal-poor star, RAVE J093730.5-062655, has been identified in the Milky Way halo as part of an ongoing survey by the R-Process Alliance. The temperature and surface ... -
R evolution: Improving perturbative QCD
(American Physical Society, 2010-07)Perturbative QCD results in the MS̅ scheme can be dramatically improved by switching to a scheme that accounts for the dominant power law dependence on the factorization scale in the operator product expansion. We introduce ... -
R&D and deployment valuation of intelligent transportation systems : a case example of the intersection collision avoidance systems
(Massachusetts Institute of Technology, 2006)Compared with investments in the conventional infrastructure, those in Intelligent Transportation Technology (ITS) include various uncertainties. Because deployment of ITS requires close public-private partnership, projects ... -
R&D management and the use of dynamic metrics
(Massachusetts Institute of Technology, 1997) -
R&D organizational reform to provide profitable products
(Massachusetts Institute of Technology, 2004)Providing profitable products for corporate business success is an important mission for the R&D organization. Although good organization design may not guarantee corporate business success, it can be a critical factor to ... -
R&D project selection : best practices for suppliers
(Massachusetts Institute of Technology, 2010)Successful research and development is critical in ensuring firms continue to meet customer needs and stay ahead of their competition. Hundreds of billions of dollars are spent every year on these R&D pursuits. It may seem ... -
R&D Selection Methods: for New Materials and Processes
(2002-06-25) -
R&D Strategies for New Automotive Technologies: Insight from fuel cells
(1999-11-14)ABSTRACT This study analyzes how the automobile industry is pursuing the development of fuel cells as a new propulsion technology for automobiles. Fuel cells represent a fundamentally different powertrain technology ... -
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R-Baclofen Reverses Cognitive Deficits and Improves Social Interactions in Two Lines of 16p11.2 Deletion Mice
(Springer Science and Business Media LLC, 2017-10)Human chromosome 16p11.2 microdeletion is among the most common gene copy number variations (CNVs) known to confer risk for intellectual disability (ID) and autism spectrum disorder (ASD) and affects an estimated 3 in 10 ... -
The R-Process Alliance: 2MASS J09544277+5246414, the most actinide-enhanced R-II star known
(American Astronomical Society, 2018-06)We report the discovery of a new actinide-boost star, 2MASS J09544277+5246414, originally identified as a very bright (V = 10.1), extremely metal-poor ([Fe/H] = -2.99) K giant in the LAMOST survey, and found to be highly ... -
The R-Process Alliance: a comprehensive abundance analysis of HD 222925, a metal-poor star with an extreme R-process enhancement of [Eu/H] = −0.14*
(American Astronomical Society, 2018-10)We present a detailed abundance analysis of the bright (V = 9.02), metal-poor ([Fe/H] = -1.47 ± 0.08) field red horizontal-branch star HD 222925, which was observed as part of an ongoing survey by the R-Process Alliance. ... -
The R-Process Alliance: chemical abundances for a trio of R-process-enhanced stars -- one strong, one moderate, and one mild
(American Astronomical Society, 2018-09)We present detailed chemical abundances of three new bright (V ∼ 11), extremely metal-poor ([Fe/H] ∼-3.0), r-process-enhanced halo red giants based on high-resolution, high-S/N Magellan/MIKE spectra. We measured abundances ... -
The R-process alliance: discovery of the first metal-poor star with a combined r- and s-process element signature
(American Astronomical Society, 2018-08)We present a high-resolution (R ∼ 35,000), high signal-to-noise ratio (S/N > 200) Magellan/MIKE spectrum of the star RAVE J094921.8-161722, a bright (V = 11.3) metal-poor red giant star with [Fe/H] = -2.2, identified as a ... -
The R-process Alliance: first release from the southern search for R-process-enhanced stars in the galactic halo
(American Astronomical Society, 2018-05)The recent detection of a binary neutron star merger and the clear evidence of the decay of radioactive material observed in this event have, after 60 years of effort, provided an astrophysical site for the rapid neutron-capture ... -
The R-Process Alliance: Spectroscopic Follow-up of Low-metallicity Star Candidates from the Best & Brightest Survey
(American Astronomical Society, 2019-01)We present results from an observing campaign to identify low-metallicity stars in the Best & Brightest Survey. From medium-resolution (R ∼ 1200-2000) spectroscopy of 857 candidates, we estimate the stellar atmospheric ... -
R-process enrichment from a single event in an ancient dwarf galaxy
(Nature Publishing Group, 2016-03)Elements heavier than zinc are synthesized through the rapid (r) and slow (s) neutron-capture processes. The main site of production of the r-process elements (such as europium) has been debated for nearly 60 years. Initial ... -
The r-process Pattern of a Bright, Highly r -process-enhanced Metal-poor Halo Star at [Fe/H ] ~ -2
(American Astronomical Society, 2018-02)All rights reserved.. A high-resolution spectroscopic analysis is presented for a new highly r-process-enhanced ([Eu/Fe] = 1.27, [Ba/Eu] = -0.65), very metal-poor ([Fe/H] = -2.09), retrograde halo star, RAVE J153830.9-180424, ...
