Abstract: Disclosed herein are (1) a light-emitting semiconductor device that uses a gallium nitride compound semiconductor (Al.sub.x Ga.sub.1-x N) in which the n-layer of n-type gallium nitride compound semiconductor (Al.sub.x Ga.sub.1-x N) is of double-layer structure including an n-layer of low carrier concentration and an n.sup.+ -layer of high carrier concentration, the former being adjacent to the i-layer of insulating gallium nitride compound semiconductor (Al.sub.x Ga.sub.1-x N); (2) a light-emitting semiconductor device of similar structure as above in which the i-layer is of double-layer structure including an i.sub.L -layer of low impurity concentration containing p-type impurities in comparatively low concentration and an i.sub.

Abstract: The apparatus of the present invention comprises a reaction vessel, and disposed within this vessel, a pair of opposed electrodes. The opposed electrodes comprise an upper electrode and a lower electrode which are spaced apart a suitable distance for receiving the substrate. The lower electrode has an upper surface covered with a solid dielectric. The upper electrode may have its lower surface covered with a solid dielectric, or it may be composed of a plurality of fine wires. Near the spaced apart electrodes are a plurality of gas outlets for uniformly dispersing the reaction gas between the spaced apart electrodes.The method of the present invention comprises introducing a reagent gas or a mixture of a reagent gas and a rare gas or an inert gas into the reaction vessel, exciting the gas to produce a glow discharge plasma under atmospheric pressure, and treating the surface of the substrate with the plasma.

Abstract: Novel discogens based on tricycloquinazoline derivatives and methods for their preparation are described. One method for their preparation is to nitrate veratraldehyde and after reducing the resulting nitrate to dimethoxy anthranil to obtain its trimerization thus producing a trisubstituted tricycloquinazoline. Another method is to start with dichlorotoluene and after its nitration to oxidize the nitrate into dichloronitrodiacetoxytoluene, its hydrolysis into benzaldehyde followed by a partial reduction to anthranil and finally by the trimerization of the anthranil to obtain the hexachlorotricycloquinazoline. The novel compounds are useful as fluorescent indicators for high performance oxygen sensors, organic conductors, liquid crystals and polymeric liquid crystals.

Abstract: A device is disclosed for performing a quantitative analysis of a patient during exercise against isometric, isokinetic, or isoinertial resistance, in order to construct a detailed musculoskeletal model of a human subject. To use the device, the subject grasps a handle which is attached to a length of cable, wound upon a cable spool. Adjustable braking means attached to the cable spool supplies isometric, isokinetic, or isoinertial resistance against unwinding of the cable in order to simulate selected lifting motions. Sensing devices detect the longitudinal and lateral angles at which the patient is pulling the cable. A torsion spring is attached to the cable spool for rewinding the cable. In the preferred version, force sensors are attached to an upper surface of the platform to detect the manner in which the subject's weight is distributed between the anterior and posterior regions of the subject's feet, as well as between the subject's right and left feet.

Abstract: There is provided a matrix and cultivation system for anchorage dependent cells. The matrix is characterized by a substantially increased available effective surface area for cell attachment which is attained by resorting to the use of a fiber network or open-pore foams with suitable pore size. Attachment of the cells can be enhanced by modifying the surface of the substrate. One embodiment comprises a matrix in particle or flake form.

Abstract: The present invention relates to a novel biologically pure culture of Triderma Harzianum, I-952, to biological control compositions containing same and to methods of protecting flowering plants and fruits from the disease gray mold, caused by B. Cinerea and the disease white rot caused by S. Sclerotiorum with the compositions.

Abstract: A condensing gas furnace/heat exchange system is provided which includes two subsystems. A first subsystem includes an outdoor coil, an indoor coil, a reversing valve and a compressor, and the heat exchange medium thereof is a liquid refrigerant, such as freon. This subsystem is operative in heating, heat-augmented heating and cooling modes of operation, and in the heat-augmenting mode of operation, gas burners provide additional BTU's to the system. The other system includes an outdoor coil, an indoor coil and a pump, but excludes a compressor or a reversing valve, and utilizes a heat-exchange medium such as water, ethylene glycol, glycol per se or a nonrefrigerant. The pump merely pumps the glycol through the system which absorbs heat/BTU's from the flames of the burner which are eventually transferred by the indoor coil to heat an associated dwelling or the like.

Abstract: Chitin-containing material is heat-treated in organic solvent or in the solvent with water, and then .beta.-1, 4 glycoside decomposing enzyme is added for decomposing the chitin-containing material by enzyme reaction. Or, chitin-containing material is ultrasonicated in organic solvent or in the solvent with water, and then chitin-containing material is decomposed by enzyme reaction of .beta.-1, 4 glycoside decomposing enzyme. Further, chitin-containing material is exposed in the solution containing urea and/or surfactant, and then chitin-containing material is let co-exist with .beta.-1, 4 glycoside decomposing enzyme under the presence or non-presence of urea and/or surfactant for decomposing chitin-containing material. Or, at the time of exposing chitin-containing material in the solution containing urea and/or surfactant, the solution is heated and the .beta.-1, 4 glycoside decomposing enzyme is added for decomposing chitin-containing material.

Abstract: Disclosed is a photo-deviometer by which accurate and reproducible measurements and photographs are obtained on a wide range of patients of all ages and ethnic background affected by strabismus.

Abstract: A new type of digital signature scheme whose security is based on the difficulty of solving systems of k polynomial equations in m unknowns modulo a composite n is proposed. The scheme uses a simple technique (called sequential linearization) for embedding trapdoors into such systems of equations.

Abstract: A target for providing coded data readable by an imaging apparatus. Location marking means enable location of the target by the imaging apparatus preparatory to an imaging operation, the location marking means having high visibility characteristics e.g. being of retroreflective material to enable identification of the location marking means against a background. Code marking regions of annular shape include circumferentially disposed code markings containing coded data which are imaged by the imaging apparatus to enable recovery of the coded data from the target. The location marking means is located generally centrally of the code marking regions so that identification of the location marking means also locates the center of the code marking regions. The location marking means includes at least one concentric annular region to enable fine location of the center. The code marking regions are rotationally dispersed relative to the center.

Abstract: By employing two independent, separate and distinct flow paths which are controllably sequentially opened during use in a single actuation operation, an error-free, spill-free flame and explosion proof liquid delivery/filling system is achieved. In the preferred embodiment, both flow paths are normally maintained in a closed, sealed configuration, requiring an actuation force to controllably, sequentially open the flow paths. In addition, by providing a cooperating, mating liquid transfer assembly, the container on which the liquid delivery/filling system is mounted can be refilled with safety and ease, completely eliminating spillage of the liquid. In this way, a fully integrated, cooperating, liquid flow controlling system is realized. Furthermore, a process for distributing toxic chemicals is disclosed which provides full control over the chemicals being distributed and prevents unwanted spillages, misuse, and mishandling of the chemicals in an unpressurized, gravity fed system.

Abstract: A multipurpose, lightweight, sheet metal bracket having a U-shaped cross-section is provided with tablike extensions of the sides of the U-shape for attachment thereto of other vehicle components. The sheet metal bracket itself can be spot-welded at a number of points to correspondingly disposed portions of an automobile internal structure for strong, rigid, permanent location to provide strong support to the steering column assembly and the brake support bracket of the automobile. Space above the sides of the U-shaped cross-section of the bracket provides safe passage for wiring between elements in the instrument panel assembly and cooperating elements in the engine compartments.

Abstract: Method for the production of fused silica in which a particulate silica feedstock material is passed from a silica feed tube through or near a plasma arc coupling zone in which at least two plasma arcs of opposite polarity are coupled, thereby raising the temperature of the feedstock material and collecting the material as fused silica.

Abstract: Material and impurity gases are introduced into a crystal growth chamber to grow a crystal film on a GaAs substrate. A light beam emitted from a variable-wavelength light source is applied to the crystal film being grown on the substrate while varying the wavelength of the light beam. The dependency, on the wavelength of the light beam, of the intensity of light reflected by the crystal film is measured, and an optimum wavelength is selected for measurement depending on the type of molecules adsorbed while the crystal film is being grown. Light is then applied at the optimum wavelength to the crystal film being grown, and a time-dependent change in the intensity of light reflected by the crystal film is measured. The rate at which the material gases are introduced into the crystal growth chamber is adjusted to control the growth rate of the crystal film, the composition ratio of a mixed crystal thereof, and the density of the impurity therein.

Abstract: The invention relates to quinazoline derivatives, or pharmaceutically-acceptable salts thereof, which possess anti-tumour activity; to processes for their manufacture; and to pharmaceutical compositions containing them.The invention provides a quinazoline of the formula: ##STR1## wherein R.sup.1 is hydrogen or amino, or alkyl or alkoxy each of up to 6 carbon atoms; or R.sup.1 is substituted alkyl or alkoxy each of up to 3 carbon atoms;R.sup.2 is hydrogen, alkyl, alkenyl, alkynyl, hydroxyalkyl, halogenoalkyl or cyanoalkyl each of up to 6 carbon atoms;Ar is phenylene or heterocyclene;L is a group of the formula --CO.NH--, --NH.CO--, --CO.NR.sup.3 --, --NR.sup.3.CO--, --CH.dbd.CH--, --CH.sub.2 O--, --OCH.sub.2 --, --CH.sub.2 S--, --SCH.sub.2 --, --CO.CH.sub.2 --, --CH.sub.2 CO-- or --CO.O--, wherein R.sup.3 is alkyl of up to 6 carbon atoms; andY is aryl or heteroaryl or a hydrogenated derivative thereof; orY is a group of the formula --A--Y.sup.

Abstract: Spraying equipment for plants growing in parallel rows comprises a main horizontal air duct and several secondary ducts extending therefrom in downward direction between the rows of plants. Each duct is provided with air outlets directed towards the plants, which are alternately opened and closed by valves so as to eject the air in pulses. One spray nozzle each is positioned in the center of each air outlet serving to eject into the pulsating air stream a jet of spraying fluid which is thereby carried onto the plants covering these from top to bottom. The equipment is attached to the front or rear of a tractor which carries a supply of spraying fluid and a pump serving to supply the material to each nozzle through piping. A blower is positioned in the main duct supplying air under pressure to the secondary ducts and to the air outlets.

Abstract: A high-sensitive magnetometer has two SQUIDs each comprising a superconducting loop with one or more Josephson junctions and also has a coil comprising a continuous loop for providing magnetic flux of input signals to each of the SQUIDs in opposite directions. The magnetic flux of the input signals is detected by sums of output voltages of the SQUIDs. Magnetic flux noises equally applied on the two SQUID are cancelled by the continuous loop and at addition of the output voltages of the SQUIDs, thus large output signals can be obtained because sums of the two SQUID output signals are obtained.