A Survey of Ring Baffle Damping in Cylindrical Tanks

Survey of Miles method for determination of damping by ring baffles in cylindrical tank

Pre-Hospital Management of Acute Myocardial Infarction

Atherosclerosis of the coronary arteries is recognized today as a major health problem in the United States, since 600,000 deaths are attributed to it annually (Vital Statistics 1966). The medical profession and the general public are well aware of the important studies of its pathogenesis and prevention. However, the profession has been so preoccupied with these phases of investigation that the mechanism of death and possible modes of correction have remained obscured until recently

Introduction

This issue of the Medical College of Virginia Quarterly is devoted to the publication of the proceedings of the Cardiac Arrhythmias Symposium held at the Cavalier Hotel in Virginia Beach, Virginia from June 8-10, 1972. The reason for such emphasis upon the field of cardiac arrhythmias is primarily due to the fact that there has been an awakened interest in recent years in the problem of sudden death. It is now being appreciated that a significant number of deaths attributed to cardiovascular disease are due to cardiac arrhythmias, a potentially correctable disorder

Introduction

This issue of the Medical College of Virginia Quarterly is an edited form of the proceedings of the Cardiac Pacing symposium held in Williamsburg, Virginia on April 16 and 17, 1971. The program emphasized the clinical aspects of cardiac pacing, and the format was structured with formal presentations followed by panel discussions

Nonlinear fluid oscillations in a partially filled cylindrical sector container

Finite-amplitude free oscillations of inviscid incompressible fluid in cylindrical sector containe

Parametric vision simulation study, part 2 Final report

Effects of landing site redesignation on visibility during manned lunar landin

Professional Concerns

In the contribution which follows, Collett B. Dilworth, Jr., of the English Department at East Carolina University, gets to the very heart of why literature is taught in schools. He broaches the question of how literary study relates to the basic skills, and he ties his rationale in with questions of accountability and its handmaiden, competency testing. Probably the heart of Dilworth\u27s argument is in his statement, The student of literature is not primarily looking for information, s/he is looking for experience

Project SHRED - Surfing Hydrodynamic Reseach using Engineernig Design

The project entails the design and wind tunnel testing of surfboard fins through the application of aerospace industry practices. To obtain the most efficient fin with qualities desirable to the surfer, aerodynamic efficiency must be maximized to obtain directional stability, maximize velocity, and avoid stalling. In Phase I of the project, five fins were manufactured and tested in the Micaplex Low-Speed Wind Tunnel, in which the saltwater conditions wherein surfboard fins operate were mimicked using the principle of dynamic similarity. The Winglet Fin was selected for further analysis in Phase II, in which surface oil flow visualization was utilized to inspect the surface flow over a range of angles of attack (α) to understand how fin geometry affects hydrodynamic performance. The modern winglet is a common performance-enhancing device developed to overcome aerodynamic losses due to wingtip vortices. This motivated winglet implementation on the surfboard fin, which possesses similar characteristics to an aircraft wing. Force measurements were collected for a 2:1 scale surfboard fin model to verify estimated forces and stall angle. Surface flow patterns were qualitatively observed via oil streaklines. From the data, instantaneous surface flow qualities were observed over the α range. The locations of open and closed separation points were detected, as well as three-dimensional flow effects and pre- and post-stall vortex behavior. Flow characteristics were analyzed to identify regions of turbulence and high surface shear stress. By applying technology normally reserved for aerospace applications, this project hopes to bring a more innovative culture to the surfing industry

Vibration analysis of three dimensional piping systems with general topology

A theoretical analysis for the characteristic undamped natural frequencies and mode shapes of three dimensional piping systems with general topology is presented. The development makes use of matrix methodology including transfer matrices, dynamic stiffness matrices, and certain topological matrices derived from the theory of linear graphs. A distributed mass model is employed throughout.http://www.archive.org/details/vibrationanalysi00bairU.S. Navy (U.S.N.) author.Lieutenant Commander, United States NavyApproved for public release; distribution is unlimited

AN \u3ci\u3eIN VITRO\u3c/i\u3e MICRO-VOLUME PROCEDURE FOR RAPID MEASUREMENT OF ERYTHROCYTIC HEXOSE MONOPHOSPHATE SHUNT ACTIVITY

I. A radiometric micro-volume procedure for measurement of erythrocytic hexose monophosphate shunt (HMS) activity in intact cells in vitro is described. 2.The procedure is rapid, allowing 200 individual HMS determinations in a single experiment of 5 hr duration. 3. The procedure is reproducible, yielding HMS activity means insignificantly different (P \u3e 0.05) between replicate experiments. 4. A profile of sodium nitrite-induced HMS stimulation is reported: HMS was elevated 2-fold (P \u3c 0.001) between zero and 2.5mM NaN02; HMS elevation was more distinct (7-fold) between 2.5 and 5.0mM NaNO2; maximum activity (22-fold) was observed between 10 and 20mM NaN02; \u3e 20mM NaNO2 caused significant (P \u3c 0.001) diminution of HMS; glucose carbon recycling through the HMS occurred only with \u3e 2.5mM NaNO2 where this process contributed :::; 16% to total HMS activity