The Experts below are selected from a list of 291 Experts worldwide ranked by ideXlab platform

Hiroyuki Noji - One of the best experts on this subject based on the ideXlab platform.

  • high speed Angle resolved imaging of a single gold nanorod with microsecond temporal resolution and one Degree Angle precision
    Analytical Chemistry, 2015
    Co-Authors: Sawako Enoki, Ryota Iino, Yamato Niitani, Yoshihiro Minagawa, Michio Tomishige, Hiroyuki Noji
    Abstract:

    We developed two types of high-speed Angle-resolved imaging methods for single gold nanorods (SAuNRs) using objective-type vertical illumination dark-field microscopy and a high-speed CMOS camera to achieve microsecond temporal and one-Degree Angle resolution. These methods are based on: (i) an intensity analysis of focused images of SAuNR split into two orthogonally polarized components and (ii) the analysis of defocused SAuNR images. We determined the Angle precision (statistical error) and accuracy (systematic error) of the resultant SAuNR (80 nm × 40 nm) images projected onto a substrate surface (azimuthal Angle) in both methods. Although both methods showed a similar precision of ∼1° for the azimuthal Angle at a 10 μs temporal resolution, the defocused image analysis showed a superior Angle accuracy of ∼5°. In addition, the polar Angle was also determined from the defocused SAuNR images with a precision of ∼1°, by fitting with simulated images. By taking advantage of the defocused image method’s full...

Lightmart - One of the best experts on this subject based on the ideXlab platform.

Zhang Renguo - One of the best experts on this subject based on the ideXlab platform.

  • Study of the retentive characteristics for SynCone conical crown immediate loading system
    Chinese Journal of Oral Implantology, 2020
    Co-Authors: Zhang Renguo
    Abstract:

    Objective:To study of the retentive characteristics for SynCone conical crown immediate loading system.Methods:6 SynCone conical crowns with 4-Degree Angle and 6 SynCone conical crowns with 6-Degree Angle were tested in vitro for a total of 5000 insertion-separation cycles to investigate their retentive characteristics under 20N insertion force.Their retentive characteristics were analyzed.Results:Under 20 N insertion force,the retentive force of SynCone conical crown system was between 5 and 10 N.The retentive force kept almost constant during the entire testing cycles.Conclusion:the SynCone conical crown system can provide adequate and constant retentive force to retain implant-supported overdentures.

Oscar Loeser - One of the best experts on this subject based on the ideXlab platform.

  • Pressure distribution tests on PW-9 wing models from -18 Degree through 90 Degree Angle of attack
    2020
    Co-Authors: Oscar Loeser
    Abstract:

    At the request of the Army Air Corps, an investigation of the pressure distribution over PW-9 wing models was conducted in the atmospheric wind tunnel of the National Advisory Committee for Aeronautics. The primary purpose of these tests was to obtain wind-tunnel data on the load distribution on the cellule to be correlated with similar information obtained in flight tests, both to be used for design purposes. Because of the importance of the conditions beyond the stall as affecting the control and stability, this investigation was extended through 90 Degree Angle of attack. The results for the range of normal flight have been given in NACA Technical Report No. 271. The present paper presents the same results in a different form and includes, in addition, those over the greater range of Angle of attack, -18 Degrees through 90 Degrees. The results show that: (1) at Angles of attack above maximum lift, the biplane upper wing pressures are decreased by the shielding action of the lower wing. (2) the burble of the biplane lower wing, with respect to the Angle of attack, is delayed, due to the shielding action of the lower wing. (3) the center of pressure of the biplane upper wing (semispan) is, in general, displaced forward and outward with reference to that of the wing as a monoplane, while for the lower wing there is but slight difference for both conditions. (4) the overhanging portion of the upper wing is little affected by the presence of the lower wing.

  • Pressure distribution over a rectangular monoplane wing model up to 90 Degree Angle of attack
    2020
    Co-Authors: Montgomery Knight, Oscar Loeser
    Abstract:

    The pressure distribution tests described in this report, covering Angles of attack up to 90 Degrees, were made on a rectangular monoplane wing model in the atmospheric wind tunnel of the LAngley Memorial Aeronautical Laboratory. These tests indicate that a rectangular wing, by reason of its large tip loads, is uneconomical aerodynamically and structurally, has pronounced lateral instability above maximum lift, and is not adaptable to accurate calculation based on the classical wing theory. (author).

Joseph B Keller - One of the best experts on this subject based on the ideXlab platform.

  • an axisymmetric free surface with a 120 Degree Angle along a circle
    Journal of Fluid Mechanics, 1997
    Co-Authors: Jeanmarc Vandenbroeck, Joseph B Keller
    Abstract:

    An axisymmetric flow due to a submerged sink in water of infinite depth is considered, with a stagnation point on the free surface above the sink. Forbes & Hocking (1990) calculated numerically a flow for each value of the Froude number F smaller than a critical value F c . For F close to F c there is a ring-shaped bump on the free surface. At F = F c , the crest of the bump becomes a ring of stagnation points. We use the numerical procedure of Hocking & Forbes to show that the bump is the first crest of a train of axisymmetric waves. The wave amplitude decreases with increasing distance from the source. Then we give a local analysis of axisymmetric free-surface flows with a circular ring of stagnation points. We find flows in which the surface has a discontinuity in slope with an enclosed Angle of 120° all along the ring. This behaviour is consistent with the numerical solution for F = F c near the crest of the bump.