Boron aluminum composite structures

Design, analysis and fabrication techniques have been developed for boron-aluminum composite structure technology and were compared with those of conventional metal structure technology to evaluate relative performance

Acoustic wave analysis

The primary mechanism for generation of acoustic waves in a centrifugal pump, due to the rotor/stator interaction, is an unsteady source at the entrance of the blade row as represented by the unsteady velocity field. The amplitudes of wave generated by pressure loading on the blades and by velocity boundary condition are compared

Method of calculating blade-to-blade plane flow in centrifugal pump

Steam filament solution determines velocity distribution due to potential flow in the blade-to-blade plane of the radial impeller. This is used to determine the mass-averaged relative fluid angle, which is in turn used in an axisymmetric program to obtain steam surfaces of the assumed axisymmetric flow

Pump discharge oscillation study Quarterly progress report no. 3, 1 Jan. - 31 Mar. 1966

Acoustic wave transmission and generation tests for determining pump discharge oscillatio

View factor computer program (VIEW)

Existing view factor program, RAVFAC, was modified to accept NASTRAN and/or RAVFAC surface descriptions. Output formatting was altered to produce view factor matrices which could be directly input to NASTRAN

Navy Nexus

Shortly after the article that follows was drafted, I was notified that I had been nominated for promotion to vice admiral and assignment as Superintendent of the U.S. Naval Academy. This unexpected set of orders will cause me to depart the Naval War College after only one year as its President. Still, and although much remains to be done to keep the college at the top of its game, the organizational and administrative changes its faculty and staff have accomplished over the past twelve months have refined its educational and research programs in significant ways. The article (which collects and elaborates on material that, in some cases, has already appeared in print, including the “President’s Forums” of the Spring and Summer 2014 issues of the Review) serves as evidence of what dedicated professionals can do when motivated by an unrelenting commitment to excellence. If it’s important to the Navy, it is on the agenda at the Naval War College! This is a bold statement, but it is one that can be rather quickly substantiated by even a casual review of what is happening on the busiest educational and research complex in the Navy—the Newport, Rhode Island, campus of the U.S. Naval War College (NWC). Since 1884, the Naval War College has existed as a place to study conflict and to produce leaders who are critical thinkers. As it celebrates its 130th anniversary, the college continues to refine its educational and research programs to meet the demands of the Navy and the national security community. While some of our more traditional offerings, such as our highly regarded Joint Professional Military Education (JPME) programs, are fairly well-known, other programs and initiatives are regaining their intended direct linkage to and support to the fleet. The primary purpose of this article is to highlight the ways in which the Naval War College is helping to prepare and shape the Navy of Tomorrow and how it is significantly supporting the Navy of Today without forgetting the lessons of history

The challenges and issues of undergraduate student retention and attainment in UK veterinary medical education

Student retention and attainment has recently been identified as a key area for development in veterinary medical education enquiry. Woodfield's research on retention and attainment across the UK disciplines has yielded some unique information about the challenges and issues of students who study veterinary medicine and related subjects. The present literature review aims to expand on Woodfield's findings and explain important issues about retention and attainment across veterinary medicine. Overall, the subject of retention and attainment in undergraduate veterinary medical education needs a great deal more empirical attention, such as data on the retention and attainment of mature and widening access students, and the effects of students being placed at remote locations during their studies. Our findings also cover some unsurprising issues: the dominance of women in a profession that is principally lead by men, the underrepresentation of black and minority ethnic (BME) students in veterinary medicine, and the effects of content overload in the veterinary medical curriculum. Based on data gathered by Woodfield and our investigation of the scholarly and gray literatures, we offer an overview of gaps in current knowledge and recommendations for further research

On the validity of the “thin” and “thick” double-layer assumptions when calculating streaming currents in porous media

We find that the thin double layer assumption, in which the thickness of the electrical diffuse layer is assumed small compared to the radius of curvature of a pore or throat, is valid in a capillary tubes model so long as the capillary radius is >200 times the double layer thickness, while the thick double layer assumption, in which the diffuse layer is assumed to extend across the entire pore or throat, is valid so long as the capillary radius is >6 times smaller than the double layer thickness. At low surface charge density (0.5 M) the validity criteria are less stringent. Our results suggest that the thin double layer assumption is valid in sandstones at low specific surface charge (<10 mC· m -2), but may not be valid in sandstones of moderate- to small pore-throat size at higher surface charge if the brine concentration is low (<0.001 M). The thick double layer assumption is likely to be valid in mudstones at low brine concentration (<0.1 M) and surface charge (<10 mC· m -2), but at higher surface charge, it is likely to be valid only at low brine concentration (<0.003 M). Consequently, neither assumption may be valid in mudstones saturated with natural brines. Copyright © 2012 Matthew D. Jackson and Eli Leinov

Thermal analyses of the International Ultraviolet Explorer (IUE) scientific instrument using the NASTRAN thermal analyzer (NTA): A general purpose summary

The NTA Level 15.5.2/3, was used to provide non-linear steady-state (NLSS) and non-linear transient (NLTR) thermal predictions for the International Ultraviolet Explorer (IUE) Scientific Instrument (SI). NASTRAN structural models were used as the basis for the thermal models, which were produced by a straight forward conversion procedure. The accuracy of this technique was sub-sequently demonstrated by a comparison of NTA predicts with the results of a thermal vacuum test of the IUE Engineering Test Unit (ETU). Completion of these tasks was aided by the use of NTA subroutines