The Experts below are selected from a list of 62667 Experts worldwide ranked by ideXlab platform
J J Balatinecz - One of the best experts on this subject based on the ideXlab platform.
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estimating the wettability of wood by the axisymmetric drop shape analysis contact diameter method
Wood Science and Technology, 1997Co-Authors: M Kazayawoko, A W Neumann, J J BalatineczAbstract:The wettability of four wood species was determined by the Axisymmetric Drop Shape Analysis-contact diameter (ADSA-CD) technique. The ADSACD technique calculates the contact angle by solving the Laplace equation of capillary given the following variables: contact diameter, volume of the liquid drop, liquid surface tension, density difference between the two fluid phases and the Gravity Constant. The liquid surface tension, density, and Gravity are known. The volume of the liquid sessile drop is obtained by means of a micrometer screw syringe. The contact diameter, the only main experimentally determinable variable is obtained by manually selecting an arbitrary set of coordinates characterizing the perimeter of the sessile drop. The ADSA-CD technique was used on four wood species (pine, cedar, ash and elm) and it was found to be a simple, adaptable, and excellent tool for measuring the contact angles on wood surfaces.
John R Klauder - One of the best experts on this subject based on the ideXlab platform.
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quantum Gravity Constant negative curvatures and black holes
Journal of High Energy Physics Gravitation and Cosmology, 2020Co-Authors: John R KlauderAbstract:For purposes of quantization, classical Gravity is normally expressed by canonical variables, namely the metric and the momentum . Canonical quantization requires a proper promotion of these classical variables to quantum operators, which, according to Dirac, the favored operators should be those arising from classical variables that formed Cartesian coordinates; sadly, in this case, that is not possible. However, an affine quantization features promoting the metric and the momentric to operators. Instead of these classical variables belonging to a Constant zero curvature space (i.e., instead of a flat space), they belong to a space of Constant negative curvatures. This feature may even have its appearance in black holes, which could strongly point toward an affine quantization approach to quantize Gravity.
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quantum Gravity Constant negative curvatures and black holes
arXiv: General Relativity and Quantum Cosmology, 2020Co-Authors: John R KlauderAbstract:For purposes of quantization, classical Gravity is normally expressed by canonical variables, namely the metric $g_{ab}(x)$ and the momentum $\pi^{cd}(x)$. Canonical quantization requires a proper promotion of these classical variables to quantum operators, which, according to Dirac, the favored operators should be those arising from classical variables that formed Cartesian coordinates; sadly, in this case, that is not possible. However, an affine quantization features promoting the metric $g_{ab}(x)$ and the momentric $\pi^c_d(x)\;[\equiv \pi^{ce}(x) \,g_{de}(x)]$ to operators. Instead of these classical variables belonging to a Constant zero curvature space (i.e., instead of a flat space), they belong to a space of Constant negative curvatures. This feature may even have its appearance in black holes, which could strongly point toward an affine quantization approach to quantize Gravity.
M Kazayawoko - One of the best experts on this subject based on the ideXlab platform.
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estimating the wettability of wood by the axisymmetric drop shape analysis contact diameter method
Wood Science and Technology, 1997Co-Authors: M Kazayawoko, A W Neumann, J J BalatineczAbstract:The wettability of four wood species was determined by the Axisymmetric Drop Shape Analysis-contact diameter (ADSA-CD) technique. The ADSACD technique calculates the contact angle by solving the Laplace equation of capillary given the following variables: contact diameter, volume of the liquid drop, liquid surface tension, density difference between the two fluid phases and the Gravity Constant. The liquid surface tension, density, and Gravity are known. The volume of the liquid sessile drop is obtained by means of a micrometer screw syringe. The contact diameter, the only main experimentally determinable variable is obtained by manually selecting an arbitrary set of coordinates characterizing the perimeter of the sessile drop. The ADSA-CD technique was used on four wood species (pine, cedar, ash and elm) and it was found to be a simple, adaptable, and excellent tool for measuring the contact angles on wood surfaces.
A W Neumann - One of the best experts on this subject based on the ideXlab platform.
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estimating the wettability of wood by the axisymmetric drop shape analysis contact diameter method
Wood Science and Technology, 1997Co-Authors: M Kazayawoko, A W Neumann, J J BalatineczAbstract:The wettability of four wood species was determined by the Axisymmetric Drop Shape Analysis-contact diameter (ADSA-CD) technique. The ADSACD technique calculates the contact angle by solving the Laplace equation of capillary given the following variables: contact diameter, volume of the liquid drop, liquid surface tension, density difference between the two fluid phases and the Gravity Constant. The liquid surface tension, density, and Gravity are known. The volume of the liquid sessile drop is obtained by means of a micrometer screw syringe. The contact diameter, the only main experimentally determinable variable is obtained by manually selecting an arbitrary set of coordinates characterizing the perimeter of the sessile drop. The ADSA-CD technique was used on four wood species (pine, cedar, ash and elm) and it was found to be a simple, adaptable, and excellent tool for measuring the contact angles on wood surfaces.
Zhou Zhou Wang - One of the best experts on this subject based on the ideXlab platform.
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Tracking Control for the Center-of-Gravity Constant Shift of Omnidirectional Rehabilitative Training Walker
Applied Mechanics and Materials, 2014Co-Authors: Zhou Zhou WangAbstract:This paper discusses the problem of tracking control on the center-of-Gravity Constant shift of omnidirectional rehabilitative training walker. The solution is proposed by pre-multiplication transposition matrix on the kinetics model of the system and the property is obtained when the center-of-Gravity shift is invariable. The controller of independent rehabilitee mass property was designed. The problem of rehabilitee mass Constant change is solved on the basis of center-of-Gravity Constant shift. The asymptotic stability of the closed system was proved using Lyapunov stable theory and LaSalle principle. The simulation results confirm the feasibility and effectiveness of the designed scheme.
