24,381 research outputs found
The History of Wake Forest College, Volume IV, 1943-1967
No full textThe Shaw volume contains much information, although it is not as detailed as the first three books. It is also more readable and wanders less often than the earlier ones. It covers the years of World War II, the admission of female students, the return of the veterans, the decision to move to Winston-Salem, the move itself, and the "fruitful years of the Tribble administration." One reviewer summarized: "Scores of names and dozens of pictures, as well as sections on student life, athletics and departmental histories complete the fabric of life at Wake Forest." A review by Linda Brinson (WFU '69) in the Winston-Salem Journal September 4, 1988, H6 concluded: "Perhaps the greatest strength of Vol. IV is that Shaw does what he states as his purpose in the preface: 'to give the whole picture of the life of the college.'" Wake Forest should be well pleased with this chronicle of the years that did so much to shape its future. Anyone with an interest in the college would find this new history a valuable source of both information and understanding. (J. Edwin Hendricks)Biographical information about the author is available in Linda Brinson, "Gentle Man of the Press," Wake Forest University Magazine, September 2, 2002. p. 46
Traite de la nature & de la fin du s. sacrement de la s. cene
No full textpar l'illustre docteur, Guillaume Wake ... ; traduit de l'anglois par J.R. Hollard ..
Traité de l'honneur qui est deu a la b.v. Marie, selon les idées des véritables protestans
No full textprononcé en forme de sermon, par le très illustre docteur Guillaume Wake ... ; et traduit en françois par J.R. Hollard ...Die zwei Blätter am Ende sind unbedruck
A terceira margem do Liffey: uma aproximação ao Finnegans Wake
No full textDissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Comunicação e Expressão.Estudo de alguns aspectos estruturais do romance Finnegans Wake (1939), do escritor irlandês James Joyce (1882-1941), como o (s) narrador (es), os personagens e o (s) enredo (s). Discussão de aspectos lingüísticos e estilísticos da obra, dentre eles as palavras-valise, os "soundsenses" e a mescla de línguas. Tradução do capítulo VIII do romance, intitulado "Anna Livia Plurabelle", assinada pela autora da dissertação. Acompanha esse trabalho um cd contendo a balada que deu origem ao título do romance e fragmentos de duas traduções do capítulo VIII e do texto original
Acoustic properties of aircraft wake vortices
No full textThe noise generation by aircraft wake vortices has been studied numerically and experimentally. The numerical study revealed a relation between the circulation Γ, the vortex core size rc and the frequency fa of the peak level in the vortex noise spectra, fa ≈ Γ/(2π rc)2. The experimental data were obtained in measurements at airports applying phased microphone arrays. It has been revealed that sound sources are closely located to the vortex cores. The focused noise spectra of the wake vortices of all measured aircraft types are dominated by two maxima. The second maximum at f = 100 Hz is clearly caused by wake vortices. The origin of the first at 12 Hz has not been identified. Wake vortices were acoustically detected in 80 percent of the flyovers. Lowest detection rates were observed for the newer aircraft types Airbus 319, 320 and Boeing 737-800. A comparison of the wake trajectories obtained by phased microphone arrays and LIDAR revealed that the detection capability of the latter is superior
Aircraft Wake Vortex Deformation in Turbulent Atmosphere
No full textLarge-scale distortion of aircraft wake vortices appears to play a crucial role for aircraft safety during approach and landing. Vortex distortion is investigated based on large eddy simulations of wake vortex evolution in a turbulent atmosphere. A vortex identification method is developed that can be adapted to the vortex scales of interest. Based on the identified vortex center tracks, a statistics of vortex curvature radii is established. This statistics constitutes the basis for understanding, modeling, and exploiting mitigation effects of vortex distortion on wake vortex encounters
The downstream wake response of marine current energy converters operating in shallow tidal flows
No full textThis paper presents findings from an experimental study investigating the downstream wake response from marine current energy convertors operating in various degrees of vertical flow constraint. The paper investigates deep vertically unconstrained sites, mid-depth sites and there is a particular emphasis on shallow tidal stream sites. Shallow tidal resources could be utilised for the deployment of first generation farms. The nature of the downstream wake flow will be a critical factor when determining the farm layout and the wake length is heavily influenced by the flow depth or ratio of rotor diameter to flow depth. A porous actuator disk is used to model the marine current energy convertor and an Acoustic Doppler Velocimeter is used to map the downstream wake. Linear scaling of length ratios suggests mid depth sites of 30-50m will produce the shortest wake lengths and for deeper and shallower sites the wake length increases. It is hoped that these relationships between vertical flow constraint and wake length will help with the layout design of tidal stream farm
Aircraft Wake-Vortex Evolution in Ground Proximity: Analysis and Parameterization
No full textField measurement data of 282 wake vortex pairs and respective environmental conditions acquired at Frankfurt Airport by means of lidar, Sodar/RASS, and ultrasonic anemometer are used to analyze wake vortex behavior in ground proximity. Exceptional cases with strong rebounds caused by detached shear layers and obstacles are introduced and estimates of the time needed to clear the runway from wake vortices by advection are provided. The impact of turbulence and crosswind on wake vortex decay proves to be weak, whereas already light crosswind turns out to be sufficient to cause pronounced asymmetric rebound characteristics. Based on the analyses vortex decay and rebound characteristics are parameterized and implemented into the probabilistic two-phase aircraft wake-vortex model. Deterministic and probabilistic prediction skill of the enhanced vortex model are assessed. Comparison to wake predictions out of ground effect indicates that in ground effect (i) the rapid-decay phase progresses slower, (ii) wake vortex evolution can be predicted with improved accuracy, and (iii) fair prediction skill requires only limited environmental data
Ground effect on a rotor wake.
No full textThe effect of the ground on a rotor wake in
forward flight has been investigated experimentally in the
working section of an 8ft x Oft straight-through wind
tunnel. A three bladed fully articulated rotor with a
solidity ratio of 0.07 and diameter of 1.06m, powered by
a hydraulic motor, has been tested at a height of 0.47 rotor
diameter above a solid ground board which has an elliptical
leading edge.
Tests have been run at various low advance ratios
(<0.1) with two collective pitch settings.
A three-element hot wire anemometer probe has
been used to measure the average value of the three
components of velocity simultaneously in the forward half
(advancing side) of the rotor wake and in the main stream
surrounding it.
The rotor wake and the ground vortices have been
visualized by smoke. Surface flow patterns on the ground
board have located the interaction region between the rotor
wake and the oncoming flow on the ground board.
Theoretical estimates of the flowfield based on
Heyson's vortex cylinder model (Ref. 2) are compared with the
experimental results.
Both experimental results and theoretical estimates
show that the ground-induced interference is an upwash and
a decrease in forward velocity. The upwash interference'
opposes the vertical flow through the rotor, and have large
effects on the rotor performance in producing thrust. The
streamwise interference decelerates the mainstream and
becomes more noticeable as the wake boundary is approached
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