Abstract: Disclosed is a novel hydrous composite oxide of cerium (IV) and phosphorus characterized by the specified chemical composition and the unique X-ray diffractometric pattern, which is useful as an adsorbent or immobilizing agent of strontium ions in an aqueous solution such as radioactive wastes from atomic power plants. The composite oxide prepared by the precipitation reaction of a Ce (IV) salt in an aqueous solution and phosphoric acid can be imparted with an increased adsorption capacity for strontium ions when the precipitates are heat-treated under hydrothermal conditions at up to 300.degree. C. Immobilization of strontium ions adsorbed on the adsorbent can be more complete when the adsorbent bearing strontium ions is dried and subjected to a heat treatment at a temperature of 200.degree. C. or higher.

Abstract: A simple, quick and precise method for determining a noise factor of an optical amplifier system is presented and demonstrated with an apparatus based on rare-earth doped optical fibers. The method is based on rapid adjustments of the phase differentials between the input optical signals into and the output optical signals from the optical amplifier to compensate for system variables including the optical fiber lengths within the apparatus as well as in the ancillary devices. A cw laser source is modulated with a first pulse having a significantly shorter cycle than a lifetime of excited atoms within the doped fiber, and the modulated pulses are continually applied to the noise determining apparatus. The optical output signal from the apparatus is synchronized with the first pulse and the optical output signal is further modulated with a series of second pulses having increasing phase differentials in relation to the first pulse.

Abstract: Proposed is a novel synthetic inorganic porous material having a chemical composition of the general formula[(SiO.sub.2).sub.8 .multidot.(MO.sub.2/3).sub.a .multidot.(OH).sub.2/3a+b ].sup.b- .multidot.b/c(A.sup.c+),in which M is an ion of a divalent metal, e.g., Mg, A is a cation of an alkali metal, alkaline earth metal, hydrogen or ammonium, the subscript a is a positive number of 3 to 10, b is a positive number of 0.1 to 1 and c is a positive number of 1 to 2, and characterized by a specific surface area of 100 to 800 m.sup.2 /g, average pore diameter of 2 to 8 nm, pore volume of 0.1 to 0.8 cm.sup.3 /g and cation exchange capacity of 0.1 to 1.2 meq/g. This porous material is prepared by a method comprising the steps of: (a) mixing an aqueous solution of sodium silicate and an aqueous solution of a water-soluble salt of a divalent metal M, e.g.

Abstract: A surface emitting type of light emitting devices has a narrow emanating region near the front surface. A spherical lens is fixed on the front surface or rear surface for converging light beams to a core of an optical fiber. Prior devices determined the position of the spherical lens by forming a concavity or a set of protrusions on the rear surface. Two wafer processes were required to form the concavity or protrusions. Two wafer processes on both surfaces induced not a little positioning error.This invention does not form concavities nor protrusions on the rear surface. The rear surface is ground and left flat. Second electrode is formed on the rear surface, not hindering light to emit through. The center of the emanating region is determined by supplying current to the device and illuminating the emanating region. The emanating pattern is observed by a TV camera connected to a computer. The center of the emanating region is detected by image processing of the illuminated pattern.

Abstract: There are disclosed an organophilic clay which comprises a hydroxypolyoxyethylenealkyl ammonium ion represented by the following formula: ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 may be the same or different, and each represent a (CH.sub.2 CH.sub.2 O).sub.n H group (where n is 2 or more, preferably 2 to 20), a hydrogen atom or an alkyl group having 1 to 30 carbon atoms, provided that one to three of R.sub.1 to R.sub.4 is/are a (CH.sub.2 CH.sub.2 O).sub.n H group(s) and at least three of R.sub.1 to R.sub.4 are (CH.sub.2 CH.sub.2 O).sub.n H group(s) and alkyl group(s),being introduced in interlayers of an expandable layer silicate, a method for preparing the same and a gellant for a high polar organic solvent.

Abstract: A method for manufacturing semiconductor light-receiving elements is provided. The method includes the steps of forming an epitaxial layer including a light-receiving layer composed of at least In, Ga, and As on an n-InP substrate by supplying at least In gas, Ga gas, and As gas to a surface of the n-InP substrate from one side of a container accommodating the n-InP substrate, forming a p-type layer in the configuration of a floating island by thermally diffusing a p-type impurity into the light-receiving layer, and separating the n-InP substrate on which the p-type layer has been formed into semiconductor light-receiving elements.

Abstract: To set the magnitude of the inertia of a motor and mechanical system or set gains suitable for the magnitude of vibrations of the motor and the mechanical system, the magnitude of a load inertia is identified in accordance with the time-integrated value of motor current to determine the gains of a feedback control loop in accordance with the identified value before executing feedback control in accordance with the determined gains.

Abstract: An apparatus for supplying gravure coating material in which coating material is directly supplied to a contacting portion of a doctor blade and a gravure roll. The apparatus includes a gravure roll, a doctor blade, supporting means for supporting the doctor blade in such a manner that contacting state of the doctor blade relative to the gravure roll is adjustable, a coating material primary reservoir for temporarily reserving coating material, measuring means for measuring and controlling the quantity of coating material fed from said coating material primary reservoir, and a coating material secondary reservoir for supplying coating material through the measuring means to a contacting portion of the doctor blade and the gravure roll.

Abstract: A compound semiconductor epitaxial wafer has a heteroepitaxial crystal layer grown on a compound semiconductor crystal substrate which has a substantially circular configuration and is free of dislocation defects at least in a central area surrounded by a cut-off that prevents defects from propagating radially inwardly into said central area.

Abstract: An abrasive tape comprises a flexible substrate and an abrasive layer which is overlaid on the flexible substrate and which contains abrasive grains, a binder, and an additive. The additive contains at least one kind of a compound represented by the general formula of ##STR1## where R.sub.1 represents a monovalent hydrocarbon group having six to 30 carbon atoms, or a fluorine-substituted alkyl group having one to 17 carbon atoms, R.sub.2 represents H or a monovalent alkyl group having one to three carbon atoms, X represents either one of ##STR2## where R.sub.3 is C.sub.3 F.sub.7 and n is an integer of 1 to 30.

Abstract: This invention relates to a microencapsulated photochromic material and a process for its preparation. More particularly, it relates to a microencapsulated photochromic material having a good durability and a process for its preparation.The present invention further relates to a water-base ink composition comprising said microencapsulated photochromic material.

Abstract: A double wishbone type suspension includes a wheel carrier, a lower control arm having one end swingably connected to the wheel carrier and the other end swingably connected to a vehicle body, a shock absorber having a shell and a piston rod projecting from the shell and disposed with the shell being above and the piston rod being below the shell and an upper control arm having one end swingably connected to the wheel carrier. The shell of the shock absorber is connected to the vehicle through an elastic mount and the piston rod is swingably connected to the lower control arm. The other end of the upper control arm is swingably connected to the shell.

Abstract: A gravure coating device and method for applying a coating to a first side of a traveling continuous web. A pair of spaced rollers support the web on the second side while a gravure roller located between the rollers tangentially contacts the first side of the web. A doctor blade is utilized to remove excess coating from the gravure roller while a nozzle is utilized to apply the coating material to the gravure roller.

Abstract: An abrasive tape comprises a flexible substrate and an abrasive layer which is overlaid on the flexible substrate and which contains abrasive grains and a binder. The abrasive grains comprise first abrasive grains, which have a mean grain diameter within the range of 0.07 .mu.m to 0.40 .mu.m and a Mohs hardness within the range of 5 to 7, and second abrasive grains, which have a mean grain diameter within the range of 0.20 .mu.m to 0.60 .mu.m and a Mohs hardness not lower than 8.5.

Abstract: A coating feeder system is disclosed herein. The coating feeder system comprises, in close vicinity to an outer peripheral surface of a gravure roll, a coating container or vessel defining a reservoir for storing a coating under a pressurized condition and a stirring mechanism for stirring the coating within the reservoir. The stirring mechanism may be a stirring and feeding roll mounted within said reservoir. The stirring and feeding roll includes forcedly stirring means formed on an outer peripheral surface thereof for forcedly stirring the coating.

Abstract: A coating device including a supply roller, a coating applicator, a driving roller and a takeup roller all cantilever mounted on a surface of a vertical panel inside a casing. A continuous base member to be coated on one side if sprially guided by guide rolls from the supply roller past the coating applicator, past the driving roller and onto the takeup roller. The base member is contacted by the rollers on the side opposite the coating.

Abstract: A gravure coating device for applying a coating to a first side of a traveling continueous web. A pair of spaced rollers support the web on the second side while a gravure roller located between the rollers tangentially contacts the first side of the web. A doctor blade is utilized to remove excess coating from the gravure roller while a nozzle is utilized to apply the coating material to the gravure roller. Specific structure for the nozzle is disclosed.