摘要:
Of the “four C's,” cut has historically been the most complex to understand and assess. This application presents a three-dimensional mathematical model o study the interaction of light with a fully faceted, colorless, symmetrical round-brilliant-cut diamond. With this model, one can analyze how various appearance factors (brilliance, fire, and scintillation) depend on proportions. The model generates images and a numerical measurement of the optical efficiency of the round brilliant-called DCLR—which approximates overall fire. DCLR values change with variations in cut proportions, in particular crown angle, pavilion angle, table size, star facet length, culet size, and lower girdle facet length. The invention describes many combinations of proportions with equal or higher DCLR than “Ideal” cuts, and these DCLR ratings may be balanced with other factors such as brilliance and scintillation to provide a cut grade for an existing diamond or a cut analysis for prospective cut of diamond rough.
摘要:
An apparatus, system and method for providing spot lighting for observing a gemstone is presented. In particular, the spot lighting provided by the invention allows for observing of the fire of a gemstone, i.e. the visible effects of light dispersion into separate colors. The apparatus includes a tube for receiving a portion of a multi-spectral light source, and a mask coupled to the tube for blocking other portions of the light source. By selecting the proper tube dimensions and aligning the tube with both the light source at an inlet and a gemstone at an outlet, the spot lighting source provides direct lighting for isolating and accentuating the effects of fire.
摘要:
The present invention is directed to novel 4-methylpyridopyrimidinone compounds of Formula (I), and to salts thereof, their synthesis, and their use as inhibitors of phosphoinositide 3-kinase alpha (PI3-Kα).
摘要:
A computer program product, electronic device and method are provided that incorporate a hierarchical structure of priority ranks for presenting a scheduling user with a relationship-based display of a schedule for another user. A priority rank of a scheduling user is determined. A view of a schedule of at least one other user is displayed, wherein the view shows scheduled events of the at least one other user that are selected at least partially in accordance with the determined priority rank of the scheduling user. Preferably the view shows scheduled of the at least one other user that correspond to a priority rank of greater importance than the determined priority rank of the scheduling user. Preferably the view does not show scheduled events of the at least one other user that correspond to a priority rank of lower importance than the determined priority rank of the scheduling user.
摘要:
Of the “four C's,” cut has historically been the most complex to understand and assess. This application presents a three-dimensional mathematical model o study the interaction of light with a fully faceted, colorless, symmetrical round-brilliant-cut diamond. With this model, one can analyze how various appearance factors (brilliance, fire, and scintillation) depend on proportions. The model generates images and a numerical measurement of the optical efficiency of the round brilliant-called DCLR—which approximates overall fire. DCLR values change with variations in cut proportions, in particular crown angle, pavilion angle, table size, star facet length, culet size, and lower girdle facet length. The invention describes many combinations of proportions with equal or higher DCLR than “Ideal” cuts, and these DCLR ratings may be balanced with other factors such as brilliance and scintillation to provide a cut grade for an existing diamond or a cut analysis for prospective cut of diamond rough.
摘要:
A method of making a standard tool for calibrating polarimeters that analyze stress in photoelastic material, includes the steps of partially annealing a starting piece of tempered glass so that the starting piece has a retardance below 250 nm/cm, removing a peripheral portion of the starting piece (preferably, at least about 20% of its radial dimension) to leave a working piece, cutting a rectangular parallelepiped from the working piece, polishing two opposing faces of the rectangular parallelepiped where the two opposing faces are spaced apart by a measurement distance through which light passes during stress analysis in a polarimeter, and determining a birefringence of the rectangular parallelepiped across the measurement distance using a calibrated polarimeter. The standard tool is the rectangular parallelepiped having the determined birefringence for the measurement distance. The method can be used to make a set of the standard tools with different measurement distances.
摘要:
The present invention is a turbine engine component comprising a superalloy substrate, a bond coat overlying the substrate having a thickness in the range of about 0.0005 inch to about 0.005 inch, a thin alumina scale overlying the bond coat, and a thermal barrier coating (TBC) overlying the thin alumina scale, the TBC having a thickness in the range of about 0.0025 inch to about 0.010 inch, and comprising at least mischmetal oxide. The present invention is also a method for the application of a thermal barrier coating to a superalloy turbine engine component comprising the steps of: providing an electron beam physical vapor deposition apparatus, providing a turbine engine component comprising a surface to be coated, providing an oxide ingot comprising mischmetal oxide and another oxide material selected from the group consisting of yttria-stablized zirconia, zirconia, yttria, hafnia, at least one other rare earth oxide, and combinations thereof, placing the component and the ingot into the apparatus, drawing a vacuum within the apparatus, forming a melt pool on the ingot, dispersing mischmetal oxide vapors and yttria-stabilized zirconia vapors, depositing the mischmetal oxide vapors and the yttria-stabilized zirconia vapors onto the surface to be coated, said deposition forming a thermal barrier coating having a thickness in the range of about 0.0025 inch to about 0.010 inch.
摘要:
A first embodiment of the present invention comprises a fully functional portable computer with central processing unit, hard disk drive data storage, and liquid crystal display and a docking station having at least a floppy disk drive, video random access memory and video controller. A motorized docking/undocking mechanism automatically docks and undocks the portable computer and docking station after the user has inserted the portable computer into the docking station or after the user has requested that the units be undocked. Numerous mechanical and electrical safeguards prevent the docking or undocking of the units if such docking or undocking is likely to lead to the loss of data or damage to the components of either unit. The internal mechanical construction of the docking station allows the user to place a large cathode ray tube display monitor directly atop the docking station without hindering the docking or undocking of the portable computer.