Strike point splitting induced by the application of magnetic perturbations on MAST

Divertor strike point splitting induced by resonant magnetic perturbations (RMPs) has been observed on MAST for a variety of RMP configurations in a plasma scenario with Ip=750kA where those configurations all have similar resonant components. Complementary measurements have been obtained with divertor Langmuir probes and an infrared camera. Clear splitting consistently appears in this scenario only in the even configuration of the perturbation coils, similarly to the density pump-out. These results present a challenge for models of plasma response to RMPs.Comment: 9 pages, 4 figures, submitted to the proceedings of the 20th Conference on Plasma Surface Interactions, to be published in the Journal of Nuclear Material

The empirical failure of the expectations hypothesis of the term structure of bond yields

This paper tests the expectations hypothesis (EH) using U.S. monthly data for bond yields spanning the 1952–2003 sample period and ranging in maturity from one month to 10 years. We apply the Lagrange multiplier test developed by Bekaert and Hodrick (2001) and extend it to increase the test power by introducing economic variables as conditioning information and by using more than two bond yields in the model and testing the EH jointly on more than one pair of yields. While the conventional bivariate procedure provides mixed results, the more powerful testing procedures suggest rejection of the EH throughout the maturity spectrum examined

Framing Questions and Modes of Inquiry in Illustration Process and Critique

Every creative act begins with a question—whether consciously or unconsciously formed—and illustrators may enhance their approaches to visual problems by framing a line of critical inquiry that invigorates conceptualization. While inventories and lists of questions are suitable ways to begin, there exist many different modes of questioning—verbal and non-verbal, manual and cognitive, linear and discursive, intuitive and rational, integrative and deconstructive. This chapter explores diverse methods for inquiry in problem definition and resolution, describing a variety of models and incorporating observations by professional artist-educators to expose different strategies for illustrators.https://digitalcommons.risd.edu/faculty_work/1005/thumbnail.jp

Understanding the effect resonant magnetic perturbations have on ELMs

All current estimations of the energy released by type I ELMs indicate that, in order to ensure an adequate lifetime of the divertor targets on ITER, a mechanism is required to decrease the amount of energy released by an ELM, or to eliminate ELMs altogether. One such amelioration mechanism relies on perturbing the magnetic field in the edge plasma region, either leading to more frequent, smaller ELMs (ELM mitigation) or ELM suppression. This technique of Resonant Magnetic Perturbations (RMPs) has been employed to suppress type I ELMs at high collisionality/density on DIII-D, ASDEX Upgrade, KSTAR and JET and at low collisionality on DIII-D. At ITER-like collisionality the RMPs enhance the transport of particles or energy and keep the edge pressure gradient below the 2D linear ideal MHD critical value that would trigger an ELM, whereas at high collisionality/density the type I ELMs are replaced by small type II ELMs. Although ELM suppression only occurs within limitied operational ranges, ELM mitigation is much more easily achieved. The exact parameters that determine the onset of ELM suppression are unknown but in all cases the magnetic perturbations produce 3D distortions to the plasma and enhanced particle transport. The incorporation of these 3D effects in codes will be essential in order to make quantitative predictions for future devices.Comment: 32 pages, 9 figure

Dental visits among adult Hispanics – BRFSS 1999 and 2006

Objectives: This study examined and compared utilization of dental services by adult US Hispanics 18 years and older in the years 1999 and 2006. Methods: Dental utilization data collected by telephone interviews by the state‐based Behavioral Risk Factor Surveillance System (BRFSS) were analyzed. Results: In 2006, the state mean and median prevalence of adult Hispanics with dental visits during the past year were 56.2 percent and 62.1 percent, respectively, and had not changed significantly since 1999. In 40 states, utilization was well below the national prevalence of 70.3 percent. Frequency of dental visits was significantly higher among females and those with higher income (>$50,000), higher education, nonsmokers, and persons having medical health insurance. Conclusions: Findings from this study suggest that barriers to utilization of dental services among Hispanic adults exist in most states and may contribute to existing oral health disparities. The magnitude of this problem may increase in the future with the expansion of the US Hispanic population.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/87091/1/j.1752-7325.2011.00259.x.pd

Comparing Simulation and Experiment of a 2D Granular Couette Shear Device

We present experiments along with molecular dynamics (MD) simulations of a two-dimensional (2D) granular material in a Couette cell undergoing slow shearing. The grains are disks confined between an inner, rotating wheel and a fixed outer ring. The simulation results are compared to experimental studies and quantitative agreement is found. Tracking the positions and orientations of individual particles allows us to obtain density distributions, velocity and particle rotation rate for the system. The key issue of this paper is to show the extent to which {\em quantitative} agreement between an experiment and MD simulations is possible. Besides many differences in model-details and the experiment, the qualitative features are nicely reproduced. We discuss the quantitative agreement/disagreement, give possible reasons, and outline further research perspectives.Comment: 8 pages, 6 figure

Simon Says (Spring 2015)

In this issue: Library Instruction CSU Archives Launches Interactive Battle of Columbus Map A Student’s Perspective on Archival Processing Government Documents New Business Librarian and Government Documents Coordinator A First Look at the CSU ePress Library Forum Center of Online Learning Transformations Upcoming Library Events CSU Libraries Connectedhttps://csuepress.columbusstate.edu/library_newsletters/1016/thumbnail.jp

Cold-Start and Warm-Up Driveability Performance of Hybrid Electric Vehicles Using Oxygenated Fuels

Provides analysis and results of the driveability performance testing from four hybrid electric vehicles--Honda Civic, Toyota Prius, and two Honda Insights--that used oxygenated fuels