Reverse pitch fan with divided splitter

A guide vane arrangement is described for improving gas turbine performance in the reverse thrust mode. This flow straightening method produces low losses in the fluid entering a core engine during reverse thrust operations and allows large supercharging of the core engine during forward thrust

Experimental evaluation of outer case blowing or bleeding of single stage axial flow compressor. Part 3 - Performance of blowing insert configuration no. 1

Experimental evaluation of outer case blowing or bleeding of single stage axial flow compressor, and performance tests using distorted or undistorted inlet flo

Experimental evaluation of outer case blowing or bleeding of single stage axial flow compressor. Part I - Design of rotor and bleeding and blowing configurations

Rotor design to evaluate outer case blowing or bleeding of single stage axial flow compresso

Preliminary design study of advanced multistage axial flow core compressors

A preliminary design study was conducted to identify an advanced core compressor for use in new high-bypass-ratio turbofan engines to be introduced into commercial service in the 1980's. An evaluation of anticipated compressor and related component 1985 state-of-the-art technology was conducted. A parametric screening study covering a large number of compressor designs was conducted to determine the influence of the major compressor design features on efficiency, weight, cost, blade life, aircraft direct operating cost, and fuel usage. The trends observed in the parametric screening study were used to develop three high-efficiency, high-economic-payoff compressor designs. These three compressors were studied in greater detail to better evaluate their aerodynamic and mechanical feasibility

Direct measurements of helium and hydrogen ion concentration and total ion density to an altitude of 940 kilometers

Measurement of ion concentration and total ion density in exosphere using mass spectrometer and electrostatic prob

Phase and amplitude scintillations of microwave signals over an elevated atmospheric path

Phase and amplitude scintillations of microwave signals over elevated atmospheric path for obtaining atmospheric density profile

Microprogram scheme for automatic recovery from computer error

Microprogram scheme enables computer to recover from failure in one of its two central processing units during time duration of instruction in which failure occurs. Microprogram advantages include - /1/ built-in interpretive capability, /2/ selection of processing interrupts by priority, and /3/ economical use of bootstrap sequence

FitnessGram Assessment Results in Five Rural Counties of Georgia

Background: Childhood obesity continues to be more prevalent in the United States (US) than ever before. Youth who reside in rural areas tend to experience higher risks of obesity and overweight status, mainly due to barriers to physical activity. Even though the US federal government has mandated a daily requirement of physical activity for all school-age children, the majority of youth from rural communities tend to not achieve the recommended Health Fitness Zone (HFZ) goals. Methods: The FITNESSGRAM is the instrument that has been used to measure and report students’ physical activity and body mass index (BMI) based on the Georgia Student Health and Physical Education Partnership (SHAPE) program recommendations. We examined BMI and aerobic activity measurements for students in 8 schools located in rural middle Georgia to determine their HFZ participation rates and achievement. The total students who participated in the aerobic capacity assessment was 1,068 (from 6 middle schools and 2 high schools) and the total who participated in the BMI assessment was 1,097 (from 5 middle schools and 2 high schools). Results: Overall, the majority of the schools were below 50% of the recommended goals. Conclusions: Additional initiatives are needed to address rural school compliance with federal and state policy recommendations and the low levels of physical activity among rural school-age children

Biochemical and metabolic effects of a six- month exposure of small animals to a helium- oxygen atmosphere

Biochemical and metabolic effects of exposure of mice to helium-oxygen atmospher