Tests on Thrust Augmenters for Jet Propulsion

This series of tests was undertaken to determine how much the reaction thrust of a jet could be increased by the use of thrust augmenters and thus to give some indication as to the feasibility of jet propulsion for airplanes. The tests were made during the first part of 1927 at the Langley Memorial Aeronautical Laboratory. A compressed air jet was used in connection with a series of annular guides surrounding the jet to act as thrust augmenters. The results show that, although it is possible to increase the thrust of a jet, the increase is not large enough to affect greatly the status of the problem of the application of jet propulsion to airplanes

Tests of N.A.C.A. airfoils in the variable-density wind tunnel Series 230.

The results of tests of six airfoils having the N.A.C.A. 230 mean line and varying in thickness from 0.06c to 0.21c are presented. These results agree with previous findings in showing that aerodynamically the best section is one of moderate thickness. The data are of value mainly in connection with the design of tapered wings having sections based on the N.A.C.A. 230 mean line

Service, slavery (utumwa) and Swahili social reality.

In this paper, I invoke a sociolinguistic approach to complement the historical record in order to examine the use of the word utumwa itself as it has changed to reveal distinct class and gender connotations especially in northem Swahili communities. To explore utumwa is difficult. There is no consensus with regard to what the word and its derivatives mean that applies consistently, yet it is clear that there has been a meaning shift since the nineteenth century. This paper examines the construction and transformation of a non-Westem-molded form of service in Africa. Oral traditions and terminological variation will be brought to bear on an analysis of utumwa `slavery, service` as an important concept of social change in East Africa and, in particular, on the northern Kenya coast What this term, its derivatives, and other terms associated with it have come to mean to Swahili speakers and culture bearers will be seen to mirror aspects of the history of Swahili-speaking people fi-om the 1Oth-11th century to the present

Utilizing engineers and scientists

Includes excerpts from some addresses heard at conference by W. C. Redman, John D. Coleman, William G. Torpey, Howard L. Bevis, Paul H. Robbins, Karl O. Wermath, Edwin M. Clark and H. M. Miller."Dr. Robert M. Eastman professor of mechanical engineering, and secretary of the Missouri Conference, sums up results of two-day meeting on utilizing engineers and scientists."--Page

How Nonprofit Organization Founding Executive Leaders Assign Meaning to Their Experience with Succession Planning: An Interpretive Phenomenological Analysis

Most nonprofit organizations face a succession of leadership during the life of the organization if the nonprofit organization is going exist past the founding executive leader. Nonprofit organization leaders acknowledge the importance of succession planning; yet, succession planning in most nonprofit organizations is nonexistent. This study utilized interpretative phenomenological analysis (IPA) to explore the meaning that seven nonprofit organization founding executive leaders assign to their experience with succession planning. The following themes emerged: (a) the creation and sustainability of the organization were driven by things greater than them, (b) there was an interdependent relationship between the founder’s identity and the organizational identity, (c) there was a desire and a belief that the organization should and will continue to exist past their tenure as executive leader, (d) there was a focus on the future, (e) there was an importance on institutionalizing the culture of the organization, and (f) there was an internal reconciliation between the connection to the organization founded and the work of establishing separation from the organization. The findings present an opportunity for founding executive leaders to focus on how their beliefs impact the extent to which they are thinking about, talking about, and engaging in succession planning in the organizations they created. The conscious knowledge of their character, feelings, motives, and desires about the organizations they created and the continued existence of these organizations is central to the founding executive leaders’ self-awareness and intention to engage in succession planning

Electron paramagnetic resonance studies of slowly tumbling vanadyl spin probes in nematic liquid crystals

An analysis of EPR line shapes by the method of Polnaszek, Bruno, and Freed is made for slowly tumbling vanadyl spin probes in viscous nematic liquid crystals. The use of typical vanadyl complexes as spin probes for nematic liquid crystals is shown to simplify the theoretical analysis and the subsequent interpretation. Rotational correlation times tau and orientational ordering parameters S sub Z where slow tumbling effects are expected to be observed in vanadyl EPR spectra are indicated in a plot. Analysis of the inertial effects on the probe reorientation, which are induced by slowly fluctuating torque components of the local solvent structure, yield quantitative values for tau and S sub Z. The weakly ordered probe VOAA is in the slow tumbling region and displays these inertial effects throughout the nematic range of BEPC and Phase V. VOAA exhibits different reorientation behavior near the isotropic-nematic transition temperature than that displayed far below this transition temperature