Missions to comets: An options review

The 19 page booklet discusses criteria for selecting candidates for potential comet rendezvous missions and describes possible mission opportunities for the 1985 to 2010 period

Ion propulsion and Comet Halley rendezvous

Cometary rendezvous missions using ion propulsion is considered. The characteristics of the ion engine are discussed including the fuel efficiency and acceleration, and the design of the ion engine is described. The operation of the ion drive engine and an overview of its applications are presented

A Review of the Open Educational Resources (OER) Movement: Achievements, Challenges, and New Opportunities

Examines the state of the foundation's efforts to improve educational opportunities worldwide through universal access to and use of high-quality academic content

An optimal controller based on linear approximation of an acoustical test facility, part B Final report

Optimal digital controller based on linear approximation of acoustical test facility, for determining effects of supersonic rocket engine noise on vehicle surfac

Super-convergence of Discontinuous Galerkin Method Applied to the Navier-Stokes Equations

The practical benefits of the hyper-accuracy properties of the discontinuous Galerkin method are examined. In particular, we demonstrate that some flow attributes exhibit super-convergence even in the absence of any post-processing technique. Theoretical analysis suggest that flow features that are dominated by global propagation speeds and decay or growth rates should be super-convergent. Several discrete forms of the discontinuous Galerkin method are applied to the simulation of unsteady viscous flow over a two-dimensional cylinder. Convergence of the period of the naturally occurring oscillation is examined and shown to converge at 2p+1, where p is the polynomial degree of the discontinuous Galerkin basis. Comparisons are made between the different discretizations and with theoretical analysis

An Investigation of High and Low Self-Disclosers\u27 Scores on the Holtzman Inkblot Technique

The purpose of this study was to see if there are any differences in how high and low self-disclosers score on the Holtzman Inkblot Technique. The study employed a causal-comparative design for descriptive purposes. Two hundred four college students were given a self-disclosure inventory, and high and low self-disclosers were randomly selected from the highest and lowest interquartile ranges. The fifty subjects were administered the group version of the Holtzman Inkblot Technique. The results indicated that female high self-disclosers scored significantly higher on Barrier and significantly lower on Hostility than female low self-disclosers