Alien Registration- Horne, Charles W. (Portland, Cumberland County)

https://digitalmaine.com/alien_docs/22057/thumbnail.jp

Aeroacoustic and aerodynamic applications of the theory of nonequilibrium thermodynamics

Recent developments in the field of nonequilibrium thermodynamics associated with viscous flows are examined and related to developments to the understanding of specific phenomena in aerodynamics and aeroacoustics. A key element of the nonequilibrium theory is the principle of minimum entropy production rate for steady dissipative processes near equilibrium, and variational calculus is used to apply this principle to several examples of viscous flow. A review of nonequilibrium thermodynamics and its role in fluid motion are presented. Several formulations are presented of the local entropy production rate and the local energy dissipation rate, two quantities that are of central importance to the theory. These expressions and the principle of minimum entropy production rate for steady viscous flows are used to identify parallel-wall channel flow and irrotational flow as having minimally dissipative velocity distributions. Features of irrotational, steady, viscous flow near an airfoil, such as the effect of trailing-edge radius on circulation, are also found to be compatible with the minimum principle. Finally, the minimum principle is used to interpret the stability of infinitesimal and finite amplitude disturbances in an initially laminar, parallel shear flow, with results that are consistent with experiment and linearized hydrodynamic stability theory. These results suggest that a thermodynamic approach may be useful in unifying the understanding of many diverse phenomena in aerodynamics and aeroacoustics

Book Reviews

Reviews of the following books: The Voyage of Archangell: James Rosier\u27s Account of the Waymouth Voyage of 1605, A True Relation by James Rosier; Bates Through the Years: An Illustrated History by Charles E. Clark; New England\u27s Covered Bridges: A Complete Guide by Benjamin D. and June R. Evans; Styles Bridges: Yankee Senator by James J. Kieppe

Book Reviews

Reviews of the following books: Landscape with Figures: Nature & Culture in New England by Kent C. Ryden; Imagining New England: Explorations of Regional Identity from the Pilgrims to the Mid-Twentieth Century by Joseph A. Conforti. A Good and Wise Measure: the Search for the American-Canadian Boundary, 1783-1842 by Francis M. Carroll. John Ford in Focus: Essays on the Filmmaker’s Life and Work, edited by Kevin L. Stoehr and Michael C. Connolly. Styles Bridges: Yankee Senator by James J. Kiepper. Giving Voters a Voice: The Origins of the Initiative and Referendum in America by Steven L. Piott. Androscoggin County, Maine – 150th: A Pictorial Sesquicentennial History, 1854 – 2004 edited by Michael C. Lord and W. Dennis Stires. Down on the Island, Up on the Main: A Recollected History of South Bristol, Maine compiled and annotated by Ellen Vincen

Book Reviews

Reviews of the following books: History of Belfast in the 20th Century: by Jay David and Tim Hughes, with Megan Pinette; At Home With The General: A Visit to the Joshua L. Chamberlain Museum by Allan M. Levinsky; “Do Your Job!” An Illustrated Bicentennial History of the Portsmouth Naval Shipyard, 1800-2000 by Richard E. Winslow, III; Super U: The History and Politics of the University of Maine System by James Libb

T Pyxidis: The First Cataclysmic Variable with a Collimated Jet

We present the first observational evidence for a collimated jet in a cataclysmic variable system; the recurrent nova T Pyxidis. Optical spectra show bipolar components of H$\alpha$ with velocities $\sim 1400 km/s$, very similar to those observed in the supersoft X-ray sources and in SS 433. We argue that a key ingredient of the formation of jets in the supersoft X-ray sources and T Pyx (in addition to an accretion disk threaded by a vertical magnetic field), is the presence of nuclear burning on the surface of the white dwarf.Comment: 10 pages 2 figures to appear in ApJ Letter

Book Reviews

Review of the following books: The McArthurs of Limington, Maine: The Family in America a Century Ago, 1783-1917 by Elizabeth Ring; Allagash: Maine\u27s Wild and Scenic River by Dean B. Bennett; Growing Up in Maine: Recollections of Childhood from the 1780\u27s to the 1920\u27s edited by Charles and Samuella Shain; The Best of Barnes: The Selected Articles and Photographs of Jack Barnes edited by Susan Conley; An Insider\u27s Guide to Maine Politics 1946-1996 by Christian Potholm

Book Reviews

Anticou\u27s Island Domain: Wabanaki People at Mount Desert Island 1500-2000 by Harald E.L. Prins and Bunny McBride; Maine Politics and Government, 2nd Edition by Kenneth T. Palmer, G. Thomas Taylor, Marcus A. LiBrizzi and Jean E. Lavigne; Survival at Work and Home: Saco-Lowell Shops in WWII by Roy P. Fairfield; Designing the Maine Landscape by Theresa Mattor and Lucie Teegarden; Historic Maine Homes: 300 Years of Great Houses Text By Christopher Glass, Photography by Brian Vanden Brink; Twentieth-Century New England Land Conservation: A Heritage of Civic Engagement by Charles H. W. Foster, ed; Mountains in Maine: Intriguing Stories Behind Their Names by Steve Pinkham