5,328 research outputs found
Simulated and experimental axial sweep visualizations at SLM pixel count F×F=128×128 and target count T=4
No full textVisualization 2. Simulated and experimental axial sweep videos of patterned volumes resulting from phase masks computed by each algorithm (NIMBLE-PATCH, GSx1, and GSx3) for a representative target point cloud distribution at an effective SLM pixel count of F×F=128×128 and a target count of T=4. XY target positions are marked by orange circles in axial sweep videos. Depth plane location within the axial sweep range is tracked by sliding red bars, with Z target positions marked by white crosses
Simulated and experimental axial sweep visualizations at SLM pixel count F×F=64×64 and target count T=4
No full textVisualization 1. Simulated and experimental axial sweep videos of patterned volumes resulting from phase masks computed by each algorithm (NIMBLE-PATCH, GSx1, and GSx3) for a representative target point cloud distribution at an effective SLM pixel count of F×F=64×64 and a target count of T=4. XY target positions are marked by orange circles in axial sweep videos. Depth plane location within the axial sweep range is tracked by sliding red bars, with Z target positions marked by white crosses
Simulated and experimental axial sweep visualizations at SLM pixel count F×F=256×256 and target count T=16
No full textVisualization 5. Simulated and experimental axial sweep videos of patterned volumes resulting from phase masks computed by each algorithm (NIMBLE-PATCH, GSx1, and GSx3) for a representative target point cloud distribution at an effective SLM pixel count of F×F=256×256 and a target count of T=16. XY target positions are marked by orange circles in axial sweep videos. Depth plane location within the axial sweep range is tracked by sliding red bars, with Z target positions marked by white crosses
Simulated and experimental axial sweep visualizations at SLM pixel count F×F=256×256 and target count T=4
No full textVisualization 3. Simulated and experimental axial sweep videos of patterned volumes resulting from phase masks computed by each algorithm (NIMBLE-PATCH, GSx1, and GSx3) for a representative target point cloud distribution at an effective SLM pixel count of F×F=256×256 and a target count of T=4. XY target positions are marked by orange circles in axial sweep videos. Depth plane location within the axial sweep range is tracked by sliding red bars, with Z target positions marked by white crosses
Experimental study of the effect of wing sweep on transonic buffet
No full textIn this study the effect of wing sweep on transonic buffet is studied experimentally to reveal the differences between two-dimensional (2D) and three-dimensional (3D) wing configurations. Background oriented schlieren (BOS) and stereographic particle image velocimetry (PIV) have been used as measurement techniques, performing experiments on: an airfoil, an unswept wing and two swept wings with a sweep angle of 15° and 30° respectively (all wings are based on the OAT15A airfoil). All wings have been tested at a constant normal Mach number (Ma∞n=0.7) with respect to the leading edge. The results show that the buffet oscillations are much stronger for the airfoil than for the three finite-span wings. A large difference in the buffet behavior can be noticed between the airfoil and the unswept wing, particularly in correspondence of the more outboard spanwise locations, suggesting that in the latter an important role could be played by finite-wing effects, notably the tip vortex. A spectral analysis has shown that for the swept wings the classical 2D buffet peak (occurring at f=160 Hz for the present conditions) is substantially attenuated, while additional contributions in the range of 450-850 Hz appear. The PIV results showed, for the 30° sweep angle wing, a periodical occurrence of a secondary supersonic area downstream of the main shockwave structure, which is absent for the other wing models. The stereographic PIV configuration allowed the reconstruction of the spanwise oriented velocity component, obtaining in the trailing edge area, spanwise outboard velocities (80-100 m/s) which are in agreement with the spanwise convection of buffet cells observed in literature in this region.Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Aerodynamic
Simulated and experimental axial sweep visualizations at SLM pixel count F×F=128×128 and target count T=16
No full textVisualization 4. Simulated and experimental axial sweep videos of patterned volumes resulting from phase masks computed by each algorithm (NIMBLE-PATCH, GSx1, and GSx3) for a representative target point cloud distribution at an effective SLM pixel count of F×F=128×128 and a target count of T=16. XY target positions are marked by orange circles in axial sweep videos. Depth plane location within the axial sweep range is tracked by sliding red bars, with Z target positions marked by white crosses
Well-conditioned asymptotic waveform evaluation for efficient computation of wave-scattering from perfectly conducting bodies
No full textThis paper presents a model order reduction algorithm for the surface electric field integral equation (EFIE) formulation of the electromagnetic wave scattering problem. The method allows fast and accurate frequency sweep calculations of electromagnetic wave scattering from a perfectly conducting (PEC) three-dimensional object. We apply the well-conditioned asymptotic waveform evaluation (WCAWE) method to circumvent the computational complexity associated with the numerical solution of such formulations. Practical implementation issues are addressed with numerical examples given to illustrate the accuracy and robustness of the proposed methods
Sweep-Holder
No full textPatent for a sweep holder intended for keeping the rear sweep of a plow straight and secure. Illustrations included
Top-down fabricated ZnO nanowire transistors for application in biosensors
No full textTop-down ZnO nanowire FETs have been fabricated using mature photolithography, ZnO atomic layer deposition (ALD) and plasma etching. This paper investigates the effects of oxygen adsorption by measuring FET characteristics at different gate bias sweep rates and by characterizing hysteresis effects. Unpassivated devices exhibit a low threshold voltage shift of 5.4 V when the gate bias sweep rate is varied from 2500 V/s to 1.2 V/s and a low hysteresis width of less than 1.5 V. These results are considerably better than the state of the art for bottom-up as-fabricated ZnO nanowire FETs and demonstrate the suitability of this top-down technology for biosensor applications
Sweep-o! Old Sydney [picture] /
No full textTitle from inscription.; Condition: Silvering, spotting.; Inscription on backing paper: Signed by artist in pencil lower right; "Sweep-O! - Old Sydney"--In pencil lower left.; Part of the Harold Cazneaux photograph collection, 1910-1940.; Accompanying letter describes the process of the composite print made by Harold Cazneaux from a negative taken by Florence Milson.; Also available in an electronic version via the Internet at: http://nla.gov.au/nla.pic-an2345931
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