Wind tunnel investigation of rotor lift and propulsive force at high speed: Data analysis

The basic test data obtained during the lift-propulsive force limit wind tunnel test conducted on a scale model CH-47b rotor are analyzed. Included are the rotor control positions, blade loads and six components of rotor force and moment, corrected for hub tares. Performance and blade loads are presented as the rotor lift limit is approached at fixed levels of rotor propulsive force coefficients and rotor tip speeds. Performance and blade load trends are documented for fixed levels of rotor lift coefficient as propulsive force is increased to the maximum obtainable by the model rotor. Test data is also included that defines the effect of stall proximity on rotor control power. The basic test data plots are presented in volumes 2 and 3

Embracing Diversity to Increase Belongingness and Foster a Culture of Success

The importance of social relationships and belonging (a fundamental human need that must be satisfied to enable positive relationship-building skills and physical and mental wellness) have been studied for decades. Research shows a strong sense of belongingness for students can positively impact their academic performance. Belongingness, or a connection to school, peers, and teachers, is strongly indicative of improved performance for historically marginalized, racially and culturally diverse students. St. Kizito school (pseudonym), an elementary school in a large urban center in Alberta, has a diverse demographic of students including many first-generation Canadians, new Canadians, and refugee students. School-based data shows that not all students have a strong connection to their school, teachers, or classmates. Some teachers may not be adequately prepared to use meaningful instructional strategies that promote belongingness for all students. Not all teacher training programs include instruction in cultural responsiveness and fostering meaningful connections. Therefore, it is proposed to provide such training at St. Kizito school through professional learning communities. Implementing pedagogical practices that allow teachers to support racially and culturally diverse students and promote a sense of belongingness are explored through authentic and culturally responsive school leadership and an inquiry change model. Keywords: belongingness, relationships, academic performance, marginalized, racially and culturally diverse, professional learning communities, authentic leadership, culturally responsive school leadershi

A Study Of A Weight Training Exercise Program As A Method To Increase Vertical Jumping Ability

Basketball was originated in 1892 at the International Young lien\u27s Christian Association Training School, Springfield, Massachusetts by Dr. James A. Naismith and Lather H. Gulick. The game was originated because it was felt that there was a need for an indoor game for the winter, as football is a fall sport and baseball is a summer sport. The original game was played using peach baskets for goals. As each goal was made the ball had to be retrieved by the use of a ladder. The first ball used for the game was a soccer football, due to its bouncing qualities. Eighteen boys, nine on each team were first used because Dr. Naismith had eighteen boys in his Young Men\u27s Christian Association Training School. Basketball attracts many spectators. Weather never causes a postponement, and spectators have all of the comforts of home. The game probably owes its popularity to the comforts it offers to spectators and the fact games can be played day or night. Basketball has grown so much since its existence that some of the high school contests now draw as high as fifteen thousand fans for one game. It is estimated that at the present time there are between seventy-five and one hundred million people who attend basketball games of one type or another in the United States alone, during the period from December 1 to March 1

Classical solutions for Yang-Mills-Chern-Simons field coupled to an external source

We find wide class of exact solutions of Yang-Mills-Chern-Simons theory coupled to an external source, in terms of doubly periodic Jacobi elliptic functions. The obtained solutions include localized solitons, trigonometric solutions, pure cnoidal waves, and singular solutions in certain parameter range. Furthermore, it is observed that these solutions exist over a nonzero background.Comment: 5 page

Origin and thermal evolution of Mars

The thermal evolution of Mars is governed by subsolidus mantle convection beneath a thick lithosphere. Models of the interior evolution are developed by parameterizing mantle convective heat transport in terms of mantle viscosity, the superadiabatic temperature rise across the mantle, and mantle heat production. Geological, geophysical, and geochemical observations of the compositon and structure of the interior and of the timing of major events in Martian evolution are used to constrain the model computations. Such evolutionary events include global differentiation, atmospheric outgassing, and the formation of the hemispherical dichotomy and Tharsis. Numerical calculations of fully three-dimensional, spherical convection in a shell the size of the Martian mantle are performed to explore plausible patterns of Martian mantel convection and to relate convective features, such as plumes, to surface features, such as Tharsis. The results from the model calculations are presented

Wind tunnel investigation of rotor lift and propulsive force at high speed. Test data appendix

For abstract, see N78-10020

Wind tunnel investigation of rotor lift and propulsive force at high speed: Test data appendix

For abstract, see N78-10020

Effects of Dysprosium Oxide Nanoparticles on Escherichia coli

There is increasing interest in the study of dysprosium oxide nanoparticles (nDy2O3) for biomedical applications due to their fluorescence and paramagnetic properties. However, the fate of nDy2O3 and their effects on natural biological systems are a growing concern. This study assessed the toxicity of nDy2O3 on Escherichia coli for concentrations between 0.02 and 2 mg L−1, exposed to three concentrations of NaCl (8500, 850, and 85 mg L−1) and three glucose concentrations (35, 70, and 140 mg L−1). The ranges of these variables were selected to cover manufacturer recommendations of analytical methodologies for toxicity assessment, environmental and industrial nDy2O3 effluent concentrations, and metabolic activity. Two array-based toxicity techniques were used to evaluate the 27 combinations of conditions. Fluorescent dyes (Live/Dead) and respirometric assays were used to measure the undisturbed cell membrane (UCM) and remaining respiration percentage (RRP), respectively. Respirometric tests showed a higher toxic effect than Live/Dead test assays, indicating that metabolic processes are more affected than the physical structure of the cell by exposure to nDy2O3. After exposing the bacteria to concentrations of 2.0 mg L−1 uncoated nDy2O3 for 2 h at 85 mg L−1 NaCl and 140 mg L−1 glucose, the RRP and UCM decreased to 43% and 88%, respectively. Dysprosium ion (Dy+3) toxicity measurement suggested that Dy+3 was the main contributor to the overall toxicity