Abstract: A light emitting and receiving integrated device is disclosed wherein a light emitting element can be sealed with a sufficiently high degree of air-tightness. The light emitting and receiving integrated device includes a package body, a light emitting element mounted on a first face side of the package body, and a light receiving element mounted on a second face side of the package body remote from the first face. A sealing member seals only the light emitting element on the first face side of the package body.

Abstract: An optical link device is provided that is capable of avoiding deterioration of a signal by preventing stray light from coming into a light receiving element and is capable of miniaturizing the device itself. There are provided a light emitting element which outputs an optical signal toward one optical fiber, a light receiving element which receives an optical signal inputted from another optical fiber, an element mounting unit on which the light emitting element and the light receiving element are mounted, a lens body having a transmission side lens unit for guiding the optical signal outputted from the light emitting element to the one optical fiber, and a reception side lens unit for guiding the optical signal outputted from the other optical fiber to the light receiving element.

Abstract: A balloon expandable superelastic stent is made of a Ti—Ni—Nb (the content of Nb being at least 3 at %) shape memory alloy. A shape recovery temperature of the stent is lower than a living body temperature in an unloaded state after shape memory treatment. The shape recovery temperature exceeds the living body temperature after the stent is mounted to a catheter and released from the catheter in a living body.

Abstract: To provide a method for simply and easily causing only IGSCC to initiate and grow in a specimen, which can retain corrosion resistance through passivation, under atmospheric pressure in a short time, an aqueous solution of potassium tetrathionate is brought into contact with the specimen capable of retaining corrosion resistance through passivation. The potassium tetrathionate concentration, temperature and pH value of the aqueous solution are from 0.3 to 6 wt. %, from 5 to 60° C., and from 3 to 6, respectively.

Abstract: An integrated optical device allowing for higher flexibility in designing its outer shape and securing hermetic sealing is provided, which includes a ceramic substrate mounting a light source, a covering member fixed to the substrate for covering the light source, and a resin mold package for attaching the substrate, wherein a metal joint portion on the substrate and a metal joint portion on the covering member are joined, as well as a through-hole in the substrate or in covering member is sealed with a transparent material for hermetic sealing of the light source.

Abstract: An optical link device which is capable of avoiding deterioration of a signal by preventing a stray light from coming into a light receiving element and is capable of miniaturizing the device itself is provided.

Abstract: An optical pickup and a disk drive apparatus, each having a reduced number of components and a reduced size, is provided with a light emitting element (11); a rise mirror (12) which includes a main portion (17) having an inclined surface (17a) formed at a predetermined angle with respect to the optical axis of a laser beam emitted from the light emitting element and which includes a half mirror (18) disposed on the inclined surface, for reflecting at least a part of the laser beam toward a disk recording medium (100); and a receiving optics (15) for receiving the laser beam reflected at the disk recording medium, and also is provided with detecting means (19) disposed in the rise mirror, for receiving a part of the laser beam emitted from the light emitting element and also for detecting the output of the received laser beam.

Abstract: In an NiMnGa alloy represented by the chemical formula of Ni2+XMn1−X Ga, a composition ratio parameter X (mol) is selected within a range of 0.10≦X≦0.30. With this composition, the finish point of the reverse transformation of the martensitic transformation can be selected to a desired temperature within the range between −20° C. and 50° C., while the Curie point is also selected to a desired temperature within the range between 60° C. and 85° C. The alloy has the shape memory effect by the martensitic transformation and the reverse transformation. Furthermore, the alloy is induced with the reverse transformation by application of an external magnetic field at the martensite phase to exhibit the shape recovery.

Abstract: Protein disulfide isomerase, which catalyzes the exchange reaction between sulfhydryl and disulfide in a protein for formation of the most stable natural type disulfide bonds, is useful for formation of natural type disulfide bonds in a protein which is produced in a prokaryotic cell.

Abstract: Protein disulfide isomerase, which catalyzes the exchange reaction between sulfhydryl and disulfide in a protein for formation of the most stable natural type disulfide bonds, is useful for formation of natural type disulfide bonds in a protein which is produced in a prokaryotic cell.

Abstract: A system of preventive maintenance for plant component parts correlates parameters for determining the transition probability distribution of degradation phenomena, selects an arbitrary influencing factor with respect to each of various influencing factors of the degradation phenomena, selects one of the parameters for the transition probability distribution as a first function, and sets the transition probability distribution when the variables of various influencing factors are reference degree values of a reference system. The system computes a ratio between the first function and the parameter value in the reference system to give a function of the subdivided index of degradation of the influencing factor, multiplies the subdivided index of degradation of various influencing factors by a unit conversion and a coefficient for reliability.

Abstract: A foot correction method comprises the steps of raising a plantar arch (15) and applying a pressure on either side of a foot (13) to thereby maintain a configuration of a longitudinal arch and a transversal arch of the foot (13) so as to prevent and correct a spraying phenomenon of the foot (13). A splint (11, 23) for practicing the method comprises shape memory alloy wires preferably in the form of either woven fabric, such as a mesh (17), or a nonwoven fabric plate. The shape memory alloy wires preferably consists of a Ti-Ni series alloy exhibiting superelasticity at a normal or used temperature.

Abstract: A vascular dilatation instrument 1 includes an outer tube 2, an inner tube 5 extending through the outer tube 2, and an inflatable member 3 having one end attached to the inner tube 5 and another end attached to the outer tube 2. The outer tube 2 includes a superelastic or pseudoelastic metal tube 2b and a synthetic resin tube 2a covering the metal tube, the metal tube 2b having a distal zone provided with a slit or perforations 2e so that the distal zone is more flexible and deformable than the remainder of the metal tube. Also provided is a catheter 100 comprising a main body section which includes a superelastic metal tube 101 and a synthetic resin layer 104 covering the metal tube, the metal tube 101 having a distal zone provided with a slit or perforations 106 so that the distal zone is more flexible and deformable than the remainder of the metal tube.

Abstract: A compact and inexpensive refractory monitoring temperature sensor and a compact and inexpensive refractory erosion location measuring device which can effect continuous detection of erosion over a wide range and specification of a location of an erosion and further can be re-used and used continuously. The temperature sensor includes at least two metal members and an insulating substance (2) filled between the metal members. The sensor detects a condition of an erosion of a refractory not from a melting breakdown of the sensor but from a variation in insulation resistance of the insulating substance which arises from a high temperature of the refractory due to erosion of the refractory. The measuring device incorporates such temperature sensor and discriminates an amount and a location of erosion of the refractory from a variation in insulation resistance between the metal members.

Abstract: An orthodontic teeth alignment correction wire element made of an alloy represented by the chemical formula of Ti.sub.a Ni.sub.b-c C.sub.c, wherein a+b=100, b=50-52, c=0.25-5.0, or an alloy represented by the chemical formula of Ti.sub.a Ni.sub.b-c-d C.sub.c X.sub.d, wherein X is at least one element selected from V, Cr, Fe, Nb, Ta, W, and Al, wherein a+b=100, b=50-52, c=0.25-5.0, d=0.25-2.0, and exhibits pseudoelasticity at the natural human body temperature. The wire has different recovery forces at different sections therealong by heat treating those sections at controlled temperatures of 400.degree.-600.degree. C. and for controlled time periods of 10-150 minutes and thereafter reheat treating them. An orthodontic coil is made of each of the above-described alloy wires for correction of mismatch of the upper and the lower jaws.

Abstract: A catheter guide wire is for use in guiding of a catheter to a destination position in vessels in body and comprises a solid core wire of a Ti-Ni shape memory alloy and an outer jacket covering the core wire. In order to provide a plasticity to one end portion of the core wire, at least one end portion is made of a 45.0-51.0 at % Ni-0.5-5.0 at % Fe-Ti shape memory alloy and is heat treated at 400.degree.-500.degree. C. The end portion is provided with a pseudo elasticity at a temperature about 37.degree. and a plasticity at a temperature below 80.degree. C. Alternatively, the end portion may be made of a 50.3-52.0 at % Ni-Ti alloy and is heat treated at a temperature of 700.degree. C. In order to improve operability of the catheter guide wire, the remaining portion other than the end portion is made of provided with a comparatively high rigidity by a usual Ti-Ni shape memory alloy which is not heat treated. Alternatively, the remaining portion is covered with an inorganic layer.

Abstract: A shape memory alloy consisting, by atomic ratio, of V 0.25-2.0% and the balance of Ni and Ti, an atomic ratio of Ni and Ti being 0.96-1.06. The shape memory alloy has a good workability and a reduced temperature difference between a martensitic transition start point and an austenitic transition finish point. When the atomic ration of Ni/Ti is 0.96-1.02, the martensitic transition start point is the room temperature or higher. When the atomic ratio of Ni/Ti is 1.02-1.06, the martensitic transition start point is the room temperature or lower. The shape memory alloy has a pseudo elasticity.

Abstract: A reversible shape memory (R.S.M.) article of Ti-Ni alloy containing excess Ni over the stoichiometric composition, such as containing 50.3-53.0 at. % Ni which has a dual phase structure of a TiNi compound phase and a precipitated Ni rich compounds phase and the improved R.S.M. property wherein the different two shapes are recovered by thermal cycles between two temperatures sufficient higher and lower than the martensitic transformation temperature (Ms). The alloy prepared by the melting method is heat-treated at 600.degree. C. or more to be made into a single phase of TiNi compound after being worked into a strip plate, and the plate is fixedly wound on a pipe and aged at 300.degree. C.-600.degree. C. for one or more hours, whereby the article having the R.S.M. property with a large amount of shape change by thermal cycles can be obtained.

Abstract: An alloy prepared by reducing the sulfur content of ASTM UNS N06600 (Trademark Inconel Alloy 600) to an extremely small value and adding specified amounts of Nb and N, and an alloy prepared by reducing the oxygen content of Inconel Alloy 600 and adding specified amounts of Nb, N, B and Mg show a mechanical strength equivalent or superior to that of Inconel Alloy 600 and excellent hot workability, and further has intergranular corrosion resistance and integranular stress corrosion cracking resistance which are far more excellent than those of Inconel Alloy 600.