The Experts below are selected from a list of 258 Experts worldwide ranked by ideXlab platform
Dieter Stoll - One of the best experts on this subject based on the ideXlab platform.
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The Hamiltonian formulation of QCD in terms of angle variables
Physics Letters B, 1994Co-Authors: Dieter StollAbstract:Abstract For the sake of eliminating gauge variant degrees of freedom we discuss the way to introduce Angular variables in the hamiltonian formulation of QCD. On the basis of an analysis of Gauss' law constraints a particular choice is made for the variable transformation from gauge Fields to Angular Field variables. The resulting formulation is analogous to the one of Bars in terms of corner variables. Therefore the corner or angle formulation may consitute an useful starting point for the investigation of the low energy properties of QCD in terms of gauge invariant degrees of freedom.
David Alan Hasselbacher - One of the best experts on this subject based on the ideXlab platform.
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THE FLAT SKY: CALIBRATION AND BACKGROUND UNIFORMITY IN WIDE Field ASTRONOMICAL IMAGES
Publications of the Astronomical Society of the Pacific, 1996Co-Authors: Frederick R. Chromey, David Alan HasselbacherAbstract:Gradients in the surface brightness of the twilight and night sky require careful consideration both in the flat-Field calibration and in the subsequent reduction of images that cover a large Angular Field. We present observations of BVRI surface brightness gradients in the twilight sky, and discuss some strategies for the treatment of gradients in the moonlit and dark sky.
Jian-ping Wang - One of the best experts on this subject based on the ideXlab platform.
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Planar Hall effect based characterization of spin orbital torques in Ta/CoFeB/MgO structures
Journal of Applied Physics, 2016Co-Authors: Jamali, Zhengyang Zhao, Delin Zhang, Angeline Klemm Smith, Jian-ping WangAbstract:The spin orbital torques in Ta/CoFeB/MgO structures are experimentally investigated utilizing the planar Hall effect and magnetoresistance measurement. By Angular Field characterization of the planar Hall resistance at ±current, the differential resistance which is directly related to the spin orbital torques is derived. Upon curve fitting of the analytical formulas over the experimental results, it is found that the anti-damping torque, also known as spin Hall effect, is sizable while a negligible Field-like torque is observed. A spin Hall angle of about 18 ± 0.6% is obtained for the Ta layer. Temperature dependent study of the spin orbital torques is also performed. It is found that temperature does not significantly modify the spin Hall angle. By cooling down the sample down to 100 K, the obtained spin Hall angle has a maximum value of about 20.5 ± 0.43%.
E.s. Kulagin - One of the best experts on this subject based on the ideXlab platform.
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A narrow-band tunable solar filter for the near-infrared spectral region
Solar Physics, 1999Co-Authors: E.s. KulaginAbstract:A narrow-band tunable solar filter was constructed for the near-infrared spectral region. It is a pre-monochromator consisting of a double monochromator with dispersion subtraction, while the final passband is formed by a scanning Fabry–Pérot interferometer. Such a filter can be realized in practice for any optical spectral region. The tuning range of the filter for the near-infrared is 9000–11 000 Å, FWHM of the passband equals 0.24 Å at the He i 10830 Å line. The Angular Field of view on the sky is 3.6′ for a diameter of the telescope of 100 mm. Filtergrams of the active region NOAA 8076 in the He i 10830 Å line were obtained on 28 August 1997, the profiles of this line in the selected points of the image, and radial velocity Field are presented.
Jerzy A. Dobrowolski - One of the best experts on this subject based on the ideXlab platform.
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Novel thin film polarizing beam splitter and its application in high-efficiency projection displays
Projection Displays V, 1999Co-Authors: Jerzy A. Dobrowolski, Brian T. Sullivan, Zhengda PangAbstract:A novel high performance thin film polarizing beam-splitter (PBS) is described. This PBS is non-absorbing and has a broad band, a wide Angular Field and high extinction ratios for both reflected and transmitted beam. Several high efficiency projection displays based on this novel PBS will be presented.
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Visible broadband, wide-angle,thin-film multilayer polarizing beam splitter.
Applied optics, 1996Co-Authors: Jerzy A. DobrowolskiAbstract:A method is described for the design of a thin-film all-dielectric polarizing beam splitter in which the transmittances for p- and s-polarized light are greater than 0.96 and less than 0.03, respectively, throughout the spectral region extending from 0.40 to 0.70 μm, and for an Angular Field of 12° measured in air.