131,079 research outputs found
Daniel Henry Power
No full textA fourth-generation Californian, Daniel Henry Power passed away peacefully on February 1, 2018 at the age of 85
Daniel Power, 85
No full textDaniel Henry Power, a Palo Alto resident who was a partner in an engineering firm, has died. He was 85. Power, who died Feb. 1, was born to Henry and Myrtle Power on July 10, 1932
Author, Geraldine Brooks at the National Library of Australia for the 2009 Ray Mathew Lecture, Canberra, 23 October 2009 [picture] /
No full textTitle from acquisitions documentation.; Part of the collection: Portraits of author, Geraldine Brooks during her visit to the National Library of Australia for the 2009 Ray Mathew Lecture, Canberra, 23 October 2009.; Acquired in digital format; access copy available online.; Mode of access: Internet via World Wide Web.; Photographed by a staff member of the National Library of Australia
TCC Power Point Presentation : Animation Principles Flash Module
No full textPower Point PresentationThis Presentation was delivered as part of th TCC Online Conference 2010. It is in Power Point format. The presentation is the cullmination of an istructional design project to teach animation principles using an interactive Flash module
Lecture by Daniel Power, S.J. on Religion and the State in American Democracy, 1955
No full textRepository: Booth Family Center for Special Collections. For more information about this collection please email: [email protected] this lecture, Daniel Power, S.J. discusses the topic of "Religion and the State in American Democracy." Power claims that a dedication to the principle of religious freedom is the most remarkable fact of American democracy. He goes on to discuss the development of separation of Church and State in American history including a resurgence of interest of the meaning of the term "separation" due to recent Supreme Court decisions regarding the place of religion in the educational process
Portrait of Robert Dessaix in the National Library of Australia bookshop, Canberra, 10 October 2008, 1 [picture] /
No full textTitle from acquisitions documentation.; Part of the collection: Portraits of author Robert Dessaix in the National Library of Australia bookshop, Canberra, 10 October 2008.; Acquired in digital format; access copy available online.; Mode of access: Internet via World Wide Web.; Photographed by a staff member of the National Library of Australia
Portrait of Robert Dessaix in the National Library of Australia bookshop, Canberra, 10 October 2008, 2 [picture] /
No full textTitle from acquisitions documentation.; Part of the collection: Portraits of author Robert Dessaix in the National Library of Australia bookshop, Canberra, 10 October 2008.; Acquired in digital format; access copy available online.; Mode of access: Internet via World Wide Web.; Photographed by a staff member of the National Library of Australia
Aerodynamic and Geometric Characteristics of Several Types of Parachutes as Determined From Wind Tunnel Tests
No full textThis report covers tests that were conducted on a 1/12 scale model of a FPS-J/MPS-7 rotating radar antenna in the Daniel Guggenheim Airship Institute"s 6"6" diameter wind tunnel in Akron, Ohio at the request of the Goodyear Aircraft Corporation. This investigation provided information necessary for determining the mean and maximum brake power requirements of the driving motor and also the shear loads and their corresponding centers of pressure. The effects of horns, ground interference, airspeed, and antenna rotational speed were investigated. Several unsuccessful attempts were made to photograph smoke injected into the wind stream
Directional stability wind tunnel tests on an M type airship model, GA 283589
No full textThis report covers the force tests made for the determination of the directional stability influence of the control car and blister on a 1/60 scale model of the "M" type airship tested for the Goodyear Aircraft Corporation in the 6"6" vertical wind tunnel of the Daniel Guggenheim Airship Institute in Akron, Ohio. The force measurements included side force, drag, and yawing moment about the center of buoyancy for the model. All tests were made at an airspeed of approximately 80 miles per hour, or a Reynolds Number of l,070,000 based upon the 1/3 power or the volume of the model
Battery Storage System as Power Unbalance Redistributor in Distribution Grids Based on Three Legs Four Wire Voltage Source Converter
No full textThis article discusses the application of battery energy storage systems (BESSs) as power redistributors in three-phase distribution grids as an add-on functionality to typical BESS applications, such as congestion management and energy arbitrage. Combining those ancillary services into a single power unit is not yet performed in practice but may constitute an emerging business opportunity to increase the BESS revenues. The unbalanced operation of the BESS voltage source converter (VSC) leads to the circulation of low-frequency current harmonics in the dc-link through the capacitors and the battery cells. Therefore, it is particularly interesting whether relatively large 50- and 100-Hz currents can safely circulate within these components. Analytical modeling and design guidelines for the dc-link of a three-leg four-wire two-level VSC operating under unbalanced loads are detailed. Furthermore, a low-power VSC prototype is used to demonstrate the working principle of the BESS, providing power unbalance redistribution and symmetric power exchange. Additionally, the ICR18650-26F Lithium-ion cells are cycled to reach end-of-life with different current profiles and C-ratings. The analysis shows that charging with a 100 Hz ripple superimposed to the dc current leads to a 10% increment in degradation
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