Tracking ocean wave spectrum from SAR images

An end to end algorithm for recovery of ocean wave spectral peaks from Synthetic Aperture Radar (SAR) images is described. Current approaches allow precisions of 1 percent in wave number, and 0.6 deg in direction

Effects of Cathode Configuration on Hall Thruster Cluster Plume Properties

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/76620/1/AIAA-24636-518.pd

Low NO sub x heavy fuel combustor concept program

A gas turbine technology program to improve and optimize the staged rich lean low NOx combustor concept is described. Subscale combustor tests to develop the design information for optimization of the fuel preparation, rich burn, quick air quench, and lean burn steps of the combustion process were run. The program provides information for the design of high pressure full scale gas turbine combustors capable of providing environmentally clean combustion of minimally of minimally processed and synthetic fuels. It is concluded that liquid fuel atomization and mixing, rich zone stoichiometry, rich zone liner cooling, rich zone residence time, and quench zone stoichiometry are important considerations in the design and scale up of the rich lean combustor

Building partnerships to scale up conservation: 4R Nutrient Stewardship Certification Program in the Lake Erie watershed

AbstractHarmful algal blooms in the Western Lake Erie Basin (WLEB) can be considered a wicked problem—there are conflicting interpretations of the problem and science, stakeholders have different values and goals, and there is no definitive solution. This paper provides an overview and lessons learned of how one set of diverse stakeholders worked together to initiate a voluntary 4R Nutrient Stewardship Certification Program to address the wicked problem in the WLEB. 4R Nutrient Stewardship (Right rate, Right time, Right place, and Right source) provides the foundation for a science-based framework that achieves sustainable plant nutrition management while considering the environment, society, and economics. The 4R Certification Program ensures a third-party auditor objectively evaluates the nutrient service providers' implementation of the 41 criteria of the program that encompass education, recordkeeping, nutrient recommendations, and applications. While the environmental impact of 4R Certification Program adoption is being evaluated currently, implementing the 4Rs has been identified as a key step to improving water quality. In two years, the 4R Certification Program has influenced nearly 40% of WLEB's farmland through the 30 4R certified providers. While any single organization could have created a nutrient management program, it would not have been as robust, as practical, or as accepted as the one created by the broad group of stakeholders involved with the WLEB 4R Advisory Committee. The rigor, structure, governance, and credibility of the 4R Certification Program make it a top candidate to act in other regions with wicked problems related to nutrient management

Effect of magnetic and non-magnetic impurities on highly anisotropic superconductivity

We generalize Abrikosov-Gor'kov solution of the problem of weakly coupled superconductor with impurities on the case of a multiband superconductor with arbitrary interband order parameter anisotropy, including interband sign reversal of the order parameter. The solution is given in terms of the effective (renormalized) coupling matrix and describes not only $T_c$ suppression but also renormalization of the superconducting gap basically at all temperatures. In many limiting cases we find analytical solutions for the critical temperature suppression. We illustrate our results by numerical calculations for two-band model systems.Comment: 18 pages (12pt) RevTeX, 4 postscript figure