Abstract:
An apparatus for generating raster graphics images from the graphics command stream includes a plurality of graphics processors each adapted to receive any part of the graphics command stream for processing the command stream part into pixel data. The apparatus also includes a frame buffer for mapping the pixel data to pixel locations and an interconnection network for interconnecting the graphics processors to the frame buffer. Through the interconnection network, each graphics processor may access any part of the frame buffer concurrently with another graphics processor accessing any other part of the frame buffer. The plurality of graphics processors can thereby transmit concurrently pixel data to pixel locations in the frame buffer. This concurrent transmission of pixel data avoids the pixel writing bottleneck inherent in prior art raster graphics systems.
Abstract:
A method and apparatus for decontaminating ground areas where toxic chemicals are buried comprises disposition of a plurality of spaced electrodes (13, 14, 21, 22) in the ground to be treated and application of a voltage across the electrodes for bringing about current flow through the ground. Power delivered to the ground volatilizes the chemicals which are collected and directed to a gas treatment system. The preferred form of the invention employs high voltage arc discharge between the electrodes for heating a ground region to relatively high temperatures at relatively low power levels.
Abstract:
A mixture of a surfactant such as sodium bis(2-ethylhexyl) sulfonsuccinate (AOT), a polar fluid such as an aqueous solution, and a nonpolar or low-polarity fluid forms reverse micelles and microemulsions under near critical and supercritical conditions. Properties of the microemulsion/reverse micelle phases formed in near critical and supercritical fluids are strongly dependent on pressure and/or temperature. The maximum water to surfactant ratio (Wo) increases dramatically in near critical propane as pressure or temperature is increased. Other non polar and low polarity fluids in which reverse micelle systems can be formed and so controlled include other near critical lower alkanes and near critical or supercritical CO2, N2O, SF6, Xenon, alkenes (ethylene and propylene) and chlorinated or fluorinated hydrocarbons (CF3Cl and CF3H).
Abstract:
This invention is directed to a microemulsion system comprising a first phase including a low-polarity fluid material which is a gas at standard temperature and pressure, and which has a cloud-point density. It also includes a second phase including a polar fluid, typically water, a monomer, preferably a monomer soluble in the polar fluid, and a microemulsion promoter for facilitating the formation of micelles including the monomer in the system. In the subject process, micelles including the monomer are formed in the first phase. A polymerization initiator is introduced into the micelles in the microemulsion system. The monomer is then polymerized in the micelles, preferably in the core of the micelle, to produce a polymeric material having a relatively high molecular weight.
Abstract:
Cermet electrode compositions comprising NiO-NiFe2O4-Cu-Ni, and methods for making, are disclosed. Addition of nickel metal prior to formation and densification of a base mixture into the cermet allows for an increase in the total amount of copper and nickel that can be contained in the NiO-NiFe2O4 oxide system. Nickel is present in a base mixture weight concentration of from 0.1 % to 10 %. Copper is present in the alloy phase in a weight concentration of from 10 % to 30 % of the densified composition. Such cermet electrodes can be formed to have electrical conductivities well in excess of 100 ohm-1cm-1. Other alloy and oxide system cermets having high content metal phases are also expected to be manufacturable in accordance with the invention.
Abstract:
A piece of useful nucleic acid is linked to a cell homing or targeting factor, for instance a growth factor, a viral antigen or a factor capable of penetrating the cellular envelope, and the resulting coupled system is used to transfect and/or transform suitably selected receptor cells. This technique provides internalization in high yields, which results in gene expression or gene expression inhibition using anti-sense RNA techniques and constitutes a significant advance over classic transfection, e.g. with Ca ions. This new approach of targeting genes opens a new field for in-vivo applications of genetics.
Abstract:
The method is based on the exploitation of the ''skin effect'' occurring in any current-conducting material as a function of the current frequency going through said material. A transformer (5) is supplied from a generator (2) and an amplifier (4) to produce the current intended to supply the tube (T) and to measure the voltage at the terminals of a shunt (6). This voltage which is characteristical of the energization current is amplified by an amplifier (8) and brought to the reference input of a phase correlation amplifier (1). The resistive component of the signal on the tube is then measured by said amplifier (1) by just measuring the signal phase component.
Abstract:
The transport surface (a, b, c, d) is associated with eight transducers acting by pairs at each of its corners along two orthogonal directions (ax, ay, bx, by, cx, cy, and dx, dy). These transducers are controlled as a function of the desired motion according to two degrees of freedom (x, y) and angular rotation about an axis (O) perpendicular to said surface. The surface is subjected by means of the transducers to vibrations within its plane, selectively along two orthogonal directions and two angular directions and according to a periodic asymetrical acceleration law, exceeding the static friction threshold of said object on said surface, in order to create a controlled sliding motion by virtue of the non-linear friction coefficient between said object and said surface.
Abstract:
The disclosed device comprises electric conductors (1, 1'; 2, 2') arranged under the writing surface and associated to a writing implement provided with a permanent magnet of which the power supply is orientated in parallel to its longitudinal axis. Said conductors form elongated meandres-like windings covering the writing surface so that when the implement is displaced in parallel to said surface and tranversely to the meandres of the windings, a sinusoidal voltage is induced at the terminals of the windings provided the instrument is close enough to the writing surface. The pitch of the meandres of the windings is so selected as to induce a sinusoidal voltage having an amplitude higher than a given threshold for a predetermined interval between the writing implement and the writing surface.
Abstract:
Copolymer film deposited on a substrate comprising covalently fixed fragments of heparine having antithrombogenic properties. The polymer further comprises free carboxylic groups intended to neutralize free amine functions which are possibly present and to improvethe hemocompatibility of the film.