Aerating Butterfly Valves to Suppress Cavitation

Proper aeration of cavitating hydraulic equipment can greatly reduce cavitation intensity, noise, and damage. This thesis quantifies the benefit, in terms of damage and noise, from aerating six inch butterfly valve. The incipient damage level of cavitation was obtained for both aerated and non -ae ra ted conditions. The level is defined as one pit per square inch of a soft aluminum test specimen per one minute of operation. A description of the cavitation pits that occurred plus where they appeared is presented. A graph showing the aerated and non-aerated limits of incipient damage is given along with a table showing the percent reduct ion of damage from aeration. A graph and table are also given depicting the reduction in noise. The proper location of aeration ports to allow natural aeration is outlined

How a Plane Crash Changed My Life

In 1983 Ted Leonsis survived a crash landing of a plane he was on.This fateful event proved to be a pivotal point in his life. One of the byproducts of that near-death experiences is Leonsis’ list of 101 things to do before he died—a bucket list” before the movie of that title came out. Leonsis has managed to accomplish more than two-thirds of the things on his list including owning a sports franchise (the Washington Capitals), changing someone’s life via a charity, sailing the Caribbean, and being on the cover of a magazine. As impressive as these accomplishments are, they do not reveal the person underneath these accomplishments or what has driven this serial entrepreneur. In previous interviews appearing in NEJE, we have explored how a person’s faith tradition impacts how they run and manage their businesses. In this interview Leonsis reveals how his life was shaped by both his early childhood and the transformational experience of a crash landing. This interview examines not only what drove Leonsis to success, but also why he feels failure is important. Along, the way he offers his perspective on corporate social responsibility and why it is so critical for individuals and companies to give back to society. And finally, Leonsis shares what he has learned about the secret to happiness

Panel. Faulkner and the Civil Rights Movement: A Reassessment

Long Faulkner: Charting Legacy on a Civil Rights Continuum / Ted Atkinson, Mississippi State UniversityThe concept of a “civil rights continuum” functions as a critical framework for reflecting on Faulkner’s legacy in a time frame extending from post-World War II labor activism through the post-Civil Rights era. Responsive to the call for a “long Civil Rights Movement” to trouble conventional periodization, this continuum affords a revealing long view of Faulkner’s civil rights legacy, as illustrated by two key coordinates charted in the discussion: the spatial rendering of proliferating boundaries in Intruder in the Dust in relation to the enduring trope of Mississippi as “the closed society” and the temporal rendering of the past as “not even past” in Requiem for a Nun as strategically deployed in the discourse of post-racialism. Faulkner and the Inheritors of Slavery / David A. Davis, Mercer UniversityWilliam Faulkner’s short story “Pantaloon in Black” (1940) and Richard Wright’s documentary narrative Twelve Million Black Voices (1941) depict the misunderstanding between black and white southerners in the generation before the civil rights movement. Faulkner focuses on the white community’s confusion about Rider’s grief over his wife’s death, which has disastrous results. Wright attempts to explain the history and experience of blacks to whites, adopting a didactic, first-person plural narrative voice. Wright’s narrative approach helps to explain the abrupt shift from third-person narration to the white deputy sheriff’s voice in Faulkner’s story, which signals the mysterious separation between the races in the South. Who was William Faulkner to them?: Civil Rights Workers, Mississippi Moderates and Faulkner / Sharon Monteith, University of NottinghamIn an essay titled “Faulkner and the Racial Crisis” Louis Daniel Brodsky asserts that both groups in my title were Faulkner’s detractors as a result of his “gradualist” position on civil rights. This paper explores that claim by examining civil rights organizers and Mississippi’s Freedom Summer volunteers, black and white, who were inspired by his work, and crusading racial liberals with whom Faulkner aligned himself to write satirically about segregation. Literary scholar Louis Rubin once imagined the ghost of Faulkner on the University of Mississippi campus in 1962. He mused “I think perhaps he would have put on his coat and tie and hat and gone over to the campus and stood quietly alongside of James Meredith. Would it have made any difference? I doubt it. Most of the citizens who milled about the campus would not have known who he was, or if they had, they would not have cared. Who was William Faulkner to them?” This paper teases out some possible answers to that question

A Simulation Study of Path and Speed Through Double-Lane Roundabouts

This study assessed the effects of geometric curvature and lane demarcation on drivers’ selection of path and speed in double-lane roundabouts. By means of a PC-based simulator, path and speed data were collected as subjects drove twice through six roundabouts. The six roundabouts varied in terms of pavement markings and geometric curvature on the entry and exit. Seventy-five participants were tested using a fixed-base driving simulator. The results showed that drivers maintained lane position better when the roundabouts had lane demarcation than when the roundabouts had no lane demarcation. Furthermore, lane-tracking behavior for participants exposed to roundabouts with pavement markings was similar to lane-tracking behavior observed in a recent field study. Observations of speed indicated that drivers drove faster though roundabouts with a large central island radius as opposed to a roundabout with a smaller central island radiu

A Simulation Study of Path and Speed Through Double-Lane Roundabouts

This study assessed the effects of geometric curvature and lane demarcation on drivers’ selection of path and speed in double-lane roundabouts. By means of a PC-based simulator, path and speed data were collected as subjects drove twice through six roundabouts. The six roundabouts varied in terms of pavement markings and geometric curvature on the entry and exit. Seventy-five participants were tested using a fixed-base driving simulator. The results showed that drivers maintained lane position better when the roundabouts had lane demarcation than when the roundabouts had no lane demarcation. Furthermore, lane-tracking behavior for participants exposed to roundabouts with pavement markings was similar to lane-tracking behavior observed in a recent field study. Observations of speed indicated that drivers drove faster though roundabouts with a large central island radius as opposed to a roundabout with a smaller central island radiu

Critical cavity in the stretched fluid studied using square-gradient density-functional model with triple-parabolic free energy

The generic square-gradient density-functional model with triple-parabolic free energy is used to study the stability of a cavity introduced into the stretched liquid. The various properties of the critical cavity, which is the largest stable cavity within the liquid, are compared with those of the critical bubble of the homogeneous bubble nucleation. It is found that the size of the critical cavity is always smaller than that of the critical bubble, while the work of formation of the former is always higher than the latter in accordance with the conjectures made by Punnathanam and Corti [J. Chem. Phys. {\bf 119}, 10224 (2003)] deduced from the Lennard-Jones fluids. Therefore their conjectures about the critical cavity size and the work of formation would be more general and valid even for other types of liquid such as metallic liquid or amorphous. However, the scaling relations they found for the critical cavity in the Lennard-Jones fluid are marginally satisfied only near the spinodal.Comment: 10 pages, 6 figures, J. Chem. Phys. at pres

Synthetic Methods of CTS and CZTS Nanocrystals

The synthesis of various morphologies of copper zinc tin sulfide (Cu2ZnSnS4) and copper tin sulfide (Cu2SnS3) nanocrystals were explored to find a more energy efficient synthesis. Reactions were all carried out at 220°C under either inert atmospheres or normal conditions. Variations in synthetic methods included reaction time and solvents used. Products were analyzed with powder X-Ray diffraction and compared to simulated powder patterns of zincblende and wurtzite nanocrystals. The synthesis of CTS nanocrystals required the reaction to be heated to 220°C overnight under an inert atmosphere. The reaction used for the synthesis of CZTS nanocrystals required less energy and only required the reaction to be heated to 220°C for four hours. The effects of solvents were found to be that 1-octadecene (ODE) yielded predominantly a zincblende morphology, oleylamine (OAm) yielded predominantly a Wurtzite morphology, and the use of 1-dodecanethiol (DDT) as the only solvent yielded a mixture of zincblende and Wurtzite nanocrystals. The various nanocrystals produced assisted in achieving our overall goal by narrowing down an energy efficient and effective synthesis of CZTS and CTS nanocrystals using earth-abundant and low cost reagents.https://digitalcommons.morris.umn.edu/urs_2015/1001/thumbnail.jp

This Is No Dream

Photograph of Tommy Dorseyhttps://scholarsjunction.msstate.edu/cht-sheet-music/5556/thumbnail.jp

Please Think Of Me

Illustration of woman\u27s face; Photograph of Tommy Dorseyhttps://scholarsjunction.msstate.edu/cht-sheet-music/12308/thumbnail.jp

The Master\u27s Degree Program in Information Systems

There has been significant recent activity related to model undergraduate curricula in information systems and suggestions for curricular improvement in content and pedagogy. Although these major efforts were modeled within the context of the North American university degree program structures, they are useful for consideration in curricular design in other systems as well. Two major studies were the recent report for undergraduate degree programs in information systems (IS’97, available on the CD- ROM containing these Proceedings) and the soon to be published NSF funded study: ISCC’99 (Educating the Next Generation of Information Specialists in Collaboration with Industry). This panel addresses the related issue of a Master’s degree program in information systems