Abstract:
The present invention, a method of the arbitration of memory request for a computer graphics system, consecutively services the requests having the same type in the same period, thereby increasing the chance of page-hit. In this arbitration method, the length of a fixed period is defined by the 3-D graphics engine in accordance with the amount of memory cycles or the amount of the requests, and is used for controlling the amount of the requests of each type. The length of the period can be the cycles of servicing a block comprising a tile or several tiles. Alternatively, instead of defining a fixed length of the period, the 3-D graphics engine can choose another arbitration method of the present invention. Another arbitration method of the present invention is to mark a message at the end of the drawing block, so that the memory control can decide to rotate the service order to the next type of requests according to the block-end message received. The present invention groups and services the memory requests according to the property of 3-D pipelining. Therefore, the page-miss and read-write turnaround penalties can be reduced, so that data can be accessed more efficiently.
Abstract:
A method of fabricating silicon nitride read only memory. A trapping layer is formed on a substrate. Next, a patterned photoresist layer is formed, and the substrate region at the lower section of the trapping layer masked by the photoresist layer is defined as a channel region. The substrate region at the lower section of the trapping layer and no masked by the photoresist layer is defined as a source/drain region. Next, a pocket ion implantation is performed while using the photoresist layer as amask, and a first dopant is implanted into the source/drain region of the substrate. The photoresist layer is used as a mask and the source/drain ions are implanted. A second dopant is implanted into the source/drain region of the substrate. After that, the photoresist layer is removed. Next, the trapping layer is used as a mask, and a thermal process is performed so that the substrate surface of the source/drain region forms a buried source/drain oxide layer, while at the same time, the second dopant at the lower section of the buried source/drain oxide layer forms a buried source/drain. The first dopant forms the pocket doping region at the edge of the channel region of the buried source/drain periphery as a result of thermal diffusion. Finally, a conductive gate is formed on the substrate.
Abstract:
Novel 5&bgr;-cyano steroid compounds including compounds of Formula VII: wherein A—A, B—B, R3, R8 and R9 are as defined in the specification.
Abstract:
A magnetostrictive element for use in a magneto-mechanical marker has a resonant frequency characteristic that is at a minimum at a bias field level corresponding to the operating point of the magnetomechanical marker. The magnetostrictive element has a magnetomechanical coupling factor k in the range 0.28 to 0.4 at the operating point. The magnetostrictive element is formed by applying cross-field annealing to an iron-rich amorphous metal alloy ribbon (45 to 82 percent iron) which includes a total of from 2 to 17 percent of one or more of Mn, Mo, Nb, Cr, Hf, Zr, Ta, V. Cobalt, nickel, boron, silicon and/or carbon may also be included. The metal alloy may include one early transition element selected from the group consisting of Zr, Hf and Ta, and also a second early transition element selected from the group consisting of Mn, Mo, Nb, Cr, and V.
Abstract:
A magnetostrictive element for use in a magnetomechanical marker has a resonant frequency characteristic that is at a minimum at a bias field level corresponding to the operating point of the magnetomechanical marker. The magnetostrictive element has a magnetomechanical coupling factor k in the range 0.28 to 0.4 at the operating point. The magnetostrictive element is formed by applying current-annealing to an iron-nickel-cobalt based amorphous metal ribbon, or by cross-field annealing an iron-nickel-cobalt alloy that includes a few percent chromium and/or niobium.
Abstract:
A synthesis is described for intermediates which are readily amenable to the large scale preparation of hydroxyethylurea-based chiral HIV protease inhibitors. The method includes forming a diastereoselective epoxide or cyanohydrin from a chiral alpha amino aldehyde.
Abstract:
A magnetostrictive element for use in a magnetomechanical article surveillance marker formed by first annealing an amorphous metal alloy, such alloy comprising iron and cobalt with the proportion of cobalt being in the range of about 5 to about 45 atomic percent, in the presence of a saturating magnetic field and then second annealing the alloy in the absence of the saturating magnetic field.
Abstract:
A self-biasing magnetostrictive element for a magnetomechanical EAS marker is formed by first annealing a ribbon of ferromagnetic material in the presence of a magnetic field applied in a transverse direction relative to the ribbon's longitudinal axis, and then annealing the ribbon a second time in the presence of a magnetic field applied in the direction of the longitudinal axis. The twice-annealed ribbon exhibits remanent magnetization along the longitudinal axis and has plural magnetic domains situated along the longitudinal axis. The orientation of magnetization in each domain is canted by .+-..theta..degree.