Results 131 to 140 of about 1,167 (185)

Laser-Doppler measurement of crosswind velocity

Applied Optics, 1982
There is a need for the remote sensing of local wind velocities over distances of hundreds of meters, and laser-Doppler anemometry (LDA) has been suggested as a suitable measuring technique. In this paper the major features of an LDA system optimized for crosswind velocity measurements are presented. Computer programs based on Mie scattering theory are
F, Durst, B M, Howe, G, Richter
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Bifurcation of volcanic plumes in a crosswind

Bulletin of Volcanology, 1994
Bent-over buoyant jets distorted by a crosscurrent develop a vortex pair structure and can bifurcate to produce two distinct lobes which diverge from one another downwind. The region downwind of the source between the lobes has relatively low proportions of discharged fluid.
Ernst, GGJ, Davis, JP, Sparks, RSJ
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Crosswind Feedforward Control – A Measure to Improve Vehicle Crosswind Behaviour

Vehicle System Dynamics, 1994
SUMMARY The theory of crosswind feedforward control was explained using the example of a vehicle with active front-wheel steering. Beforehand, the calculation formulas and frequency responses of the transient crosswind force and of the wind yaw moment acting on the vehicle were derived using the example of a simple vehicle fluid model. The influence of
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Coherent lidar crosswind sensing

SPIE Proceedings, 1998
Range-resolved crosswind measurements are required for improved ballistics accuracy in a variety of planetary boundary layer applications. In these environments, the effects wind turbulence can cause large errors in estimates derived using conventional Velocity Azimuth Display (VAD) lidar techniques.
Philip Gatt, J. Alex L. Thomson, Stephen M. Hannon   +2 more
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Crosswinds

1993
"H[starred review] Powerful and rich, this outstanding contribution to theater arts is recommended for contemporary literature and black studies collections." -Library JournalEdited by award-winning U.S. playwright William Branch, this is a landmark collection of plays addressing various aspects of the global black experience by outstanding black ...
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Caught in the Crosswinds of the Atlantic

Journalism History, 2011
John Brown Russwurm (1799-1851), Freedoms Journal, and African Colonization This article reassesses the career at Freedom's Journal of John B. Russwurm, co-founder of America's first black newspaper in New York City. Rather than being a convert to emigrationism, he counted among his long-term associates several who were actively engaged in promoting ...
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A comparison of scintillation crosswind methods

IGARSS '96. 1996 International Geoscience and Remote Sensing Symposium, 2002
Shimmering of distant objects on a hot day or the twinkling of stars is familiar to most people. These visual effects, known as scintillation, are caused by the drift of refractive-index irregularities in the atmosphere. Analysis of scintillation phenomena provide a method for remotely sensing the atmosphere, since this effect is related to turbulence ...
L. Poggio, M. Furger, W.K. Graber
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Noise Characteristics of a Turbulent Crosswind Jet

AIAA Journal, 1974
The turbulent flow which results when a circular jet issues into a crosswind is a noise source which is encountered during take-off and landing of certain types of V/STOL aircraft. The acoustic intensity of the noise from this flow is calculated by extending the freejet model of Ribner 1'2 to those crosswind jets for which the ratio of jet velocity to ...
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Technical Stability of an Aircraft in a Crosswind Run

International Applied Mechanics, 2001
The paper deals with the problem of technical stability of an aircraft take-off at lateral wind. Reviewer's remark: The author does not refer to the papers by \textit{A. A. Kayande} and \textit{M. Rama Mohana Rao} [Notes Comun. Math., Recife 20, 1--18 (1969; Zbl 0231.34048)] and \textit{A. A. Martynyuk} [Kibern. Vychisl. Tekhn. 15, Slozhn. Sist. Upravl.
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The driver as a sensor for crosswind sensitivity

ATZ worldwide, 2002
There are currently no standardized criteria for evaluating a vehicle’s crosswind behaviour. The application of conventional criteria to some vehicles results in different — and in some cases even contradictory — evaluations. The Research Institute of Automotive Engineering and Vehicle Engines Stuttgart (FKFS) of Stuttgart University is developing an ...
Andreas Wagner, Jochen Wiedemann, Jens Neubeck   +2 more
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