Browsing by Title
Now showing items 136347-136366 of 143233
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U(1) X U(1) XI Z(2) Chern-Simons theory and Z(4) parafermion fractional quantum Hall states
(American Physical Society, 2010-01)We study U(1)×U(1)⋊Z2 Chern-Simons theory with integral coupling constants (k,l) and its relation to certain non-Abelian fractional quantum Hall (FQH) states. For the U(1)×U(1)⋊Z2 Chern-Simons theory, we show how to compute ... -
U(1) × U(1) symmetry-protected topological order in Gutzwiller wave functions
(American Physical Society, 2014-12)Gutzwiller projection is a way to construct many-body wave functions that could carry topological order or symmetry-protected topological (SPT) order. However, an important issue is to determine whether or not a given ... -
U-Pb dating of interspersed gabbroic magmatism and hydrothermal metamorphism during lower crustal accretion, Vema lithospheric section, Mid-Atlantic Ridge
(American Geophysical Union (AGU), 2015-04)New U/Pb analyses of zircon and xenotime constrain the timing of magmatism, magmatic assimilation, and hydrothermal metamorphism during formation of the lower crust at the Mid-Atlantic Ridge. The studied sample is an altered ... -
U-Pb geochronological constraints on the tectonic and thermal evolution of paleoproterozoic crust in the Grand Canyon, Arizona
(Massachusetts Institute of Technology, 1996) -
U-Pb geochronology of the Acasta Gneiss Complex in Northwest Canada
(Massachusetts Institute of Technology, 2009)The Acasta Gneiss Complex in Northwest Canada contains the oldest dated rocks in the world. The gneisses range in age from 4.03-3.6 Ga, as determined by U-Pb dating of zircons (Bowring and Williams 1999). U-Pb dating of ... -
U-shaped fairings suppress vortex-induced vibrations for cylinders in cross-flow
(Cambridge University Press, 2015-10)We employ three-dimensional direct and large-eddy numerical simulations of the vibrations and flow past cylinders fitted with free-to-rotate U-shaped fairings placed in a cross-flow at Reynolds number 100 ⩽ Re ⩽ 10,000. ... -
U-Th dating of lacustrine carbonates
(Massachusetts Institute of Technology, 2020)Carbonates are prevalent in many modern and ancient lacustrine settings, but reconstructions of past lake levels or environments from such materials have been hindered by poor chronology. Uranium-thorium (U-Th) dating has ... -
U-Th dating of lake sediments: Lessons from the 700 ka sediment record of Lake Junín, Peru
(Elsevier BV, 2020)© 2020 Elsevier Ltd Deep sediment cores from long-lived lake basins are fundamental records of paleoenvironmental history, but the power of these reconstructions has been often limited by poor age control. Uranium-thorium ... -
U-Th dating of lake sediments: Lessons from the 700 ka sediment record of Lake Junín, Peru
(Elsevier BV, 2020-09)© 2020 Elsevier Ltd Deep sediment cores from long-lived lake basins are fundamental records of paleoenvironmental history, but the power of these reconstructions has been often limited by poor age control. Uranium-thorium ... -
A U.S. "software factory" experiment--System Development Corporation
(Cambridge, Mass. : Sloan School of Management, Massachusetts Institute of Technology, 1987) -
U.S. AI Policy - A Balancing Act
(Massachusetts Institute of Technology, 2023-06)Artificial intelligence policy is emerging as a critical component of U.S. strategy and strategies for countries around the world. What type of AI policy will allow the United States to continue to lead the world in AI ... -
The U.S. air bag regulation : an evaluation of public policy
(Massachusetts Institute of Technology, 1996) -
U.S. Air Quality and Health Benefits from Avoided Climate Change under Greenhouse Gas Mitigation
(Springer-Verlag, 2015-06)We evaluate the impact of climate change on U.S. air quality and health in 2050 and 2100 using a global modeling framework and integrated economic, climate, and air pollution projections. Three internally consistent ... -
U.S. airline business models 2006-2015 : trends and key impacts
(Massachusetts Institute of Technology, 2017)This thesis focuses on the evolution of U.S. airline business models from 2006-2015, and the impacts of these changes on other stakeholders in the U.S. air transportation system. The U.S. airline industry has been affected ... -
U.S. airline industry operating cost measures from 2000-2016
(Massachusetts Institute of Technology, 2018)This thesis investigates the evolution of U.S. airlines' unit operating costs from 2000-2016 as well as the factors that drove major changes in cost metrics. We assess the trends in operating cost by carrier type as well ... -
The U.S. and Japanese space programs : a comparative study of goals and capabilities
(The MIT Japan Program, Massachusetts Institute of Technology, 1991) -
The U.S. Army Coprs [sic] of Engineer's role in reconstruction of Kuwait : a case study and its implications for future international missions
(Massachusetts Institute of Technology, 1992) -
The U.S. aviation system to the year 2000
(Cambridge : Massachusetts Institute of Technology, Flight Transportation Laboratory, [1982], 1982)Introduction: 1.1 The Future of the Aviation System. It is nothing if not presumptuous to look ahead twenty years in any phase of human activity. This seems particularly true in civil aviation where the certificated airlines ... -
U.S. Bamboo house of the future : standardizing ecological living
(Massachusetts Institute of Technology, 2006)This thesis focuses on ecological living through the use of bamboo. It explores how the material can be used for methods of prefabricated housing design within the United States. It also uses a "ht of parts" and describes ... -
The U.S. cable television industry : the multi-service operator organizational structure as a bundle of competencies
(Massachusetts Institute of Technology, 2009)The United States cable television industry is experiencing fierce competition from telephone companies and content providers, as well as new and possibly unknown entrants. As organizations in the industry are currently ...
