Abstract: A method of making a magnetic head, which includes etching hard matter from the air bearing surface of a slider and polishing the air bearing surface of a magnetic head core together with that of the slider, whereby the floating height of the magnetic head is reduced.

Abstract: The invention relates to a drive apparatus for a liquid crystal display device. The voltage, to be applied to longitudinally and latitudinally arranged liquid crystal cells of the liquid crystal display device, is altered in polarity from field to field and from frame to frame, whereby the occurrence of flicker is prevented. The field discriminating device counts the numbers of lines in first and second fields by synchronizing a vertical synchronizing signal at a leading point of a field time. Thereafter the difference in the number of lines between the first and second fields is detected, the field times being thereby discriminated. When a video signal is erroneous, the field discriminating device provides a field discriminating signal, the level of which is changed alternately from field time to field time.

Abstract: An osteogenesis promotion with use of a vitamin D derivative of the formula: ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3, which may be the same or different, each represents a hydrogen atom or a hydroxyl group; and R.sub.4 is a hydrogen atom or a lower alkyl group having 4-6 carbon atoms that may or may not be substituted by a hydroxyl group, are disclosed. A pharmaceutical composition comprising the above derivatives is useful as a therapeutic agent for osteoporosis.

Abstract: The invention relates to a drive apparatus for a liquid crystal display device. The voltage, to be applied to longitudinally and latitudinally arranged liquid crystal cells of the liquid crystal display device, is altered in polarity from field to field and from frame to frame, whereby the occurrence of flicker is prevented. The field discriminating device counts the numbers of lines in first and second fields by synchronizing a vertical synchronizing signal at a leading point of a field time. Thereafter the difference in the number of lines between the first and second fields is detected, the field times being thereby discriminated. When a video signal is erroneous, the field discriminating device provides a field discriminating signal, the level of which is changed alternately from field time to field time.

Abstract: Optically active serine can be racemized at a high reaction rate under the relatively mild conditions by treating the optically active serine in an alkaline solution in the presence of pyridoxal phosphate or salicylaldehyde and an alkaline compound.

Abstract: A data processing system comprising at least two operating systems (OS1, OS2) for virtual machines, a supervisory operating system, i.e., a control program (CP) for controlling the operating systems, control registers (CR0, CR1, ---) and an extended control register (ECR) having a special bit. When a control register operating instruction (LCTL or STCTL) is executed by one of the operating systems, the special bit has a first value and the operating system directly accesses the control register. When the other of the operating systems attempts to execute such a control register operating instruction, the special bit has a second value and an interruption is generated in the supervisory operating system.

Abstract: A main storage access control system for a virtual computing function system includes an address register for registering memory addresses used for accessing a main storage and being operated under a plurality of address modes having different effective bit lengths concerning the memory addresses, a tag register for registering tag bits for individually designating the address registers, and a selection unit for selecting the designation of address registers designated by the tag bits by means of an operand address of an instruction which is to be executed by the program of the virtual machine monitoring region. The address mode is changed to the address mode used by the virtual computing function system by means of the output signal of the selection means. The method concerning the conversion of an access key by the output of a register designation detection unit in a virtual computing function system is also treated.

Abstract: A process for purifying tryptophan so as to contain almost no unreacted indole and a process for recovering unreacted indole with a very high percentage are provided, the purification process comprising passing a reaction fluid of tryptophan prepared from indole as raw material by means of an enzyme function, through a porous type, cation exchange resin layer, to cause the ion exchange part of the resin to absorb tryptophan, while to cause the porous part of the resin to adsorb indole, followed by eluting only the tryptophan with an alkali or acid aqueous solution, and the recovery process comprising subjecting tryptophan to repeated treatments of adsorption onto and elution from the ion exchange part of the resin and regeneration followed by eluting indole adsorbed onto the porous part of the resin with a water-containing organic solvent miscible with water and isolating indole from the resulting elute.

Abstract: Disclosed is a method for separating lycine and L-serine from a solution containing both of them in the dissolved state and, in particular, a reaction solution obtained from a fermentation or enzymic conversion process for the preparation of L-serine by using glycine as the raw material. This method is based on a chromatographic technique utilizing the differential affinity of L-serine and glycine for a strongly acidic ion exchange resin.

Abstract: A multiprocessor system including firmware, which system is comprised of at least a plurality of central processing units and a main memory to be commonly occupied by all the central processing units. The main memory is composed of an operating system area and a firmware area. The firmware area is divided into a common firmware area utilized by all the central processing units and a plurality of independent prefix areas allotted to the central processing units. Each prefix area is operative as an interface port, for a respective central processing unit, between the operating system area and the common firmware area.

Abstract: This invention relates to a register and more specifically to register control in a data processing system. In general, a number of control registers are theoretically required that is less than the maximum number which can be designated, and only the required number of registers are mounted as hardware. In order to add functions or to provide compatibility with other systems, it is sometimes required to use a register that is not mounted as hardware, or to use the registers mounted as hardware for conflicting purposes. Virtual registers are accordingly provided for at address locations in the memory of the processing system. However, if only the registers to be added are thusly provided for in the memory, the instructions must be executed by distinguishing between register access and memory access, in accordance with register number, etc. Thus, this invention provides a number of virtual registers for instance equal to the number that can be designated.

Abstract: In a data processing device comprising a main storage unit, a buffer storage unit, and an error check and correction circuit, when data held in the buffer storage unit contains a single-bit error, the data containing the single-bit error is moved out from the buffer storage unit by generating a predetermined number of addresses having the same number (memory sector) as the data containing the single-bit error. The data is then corrected by the error check and correction circuit, and the corrected data is stored in the main storage unit.

Abstract: A system for processing machine check interruption using a data processor which outputs a machine check interruption signal by detecting the generation of a machine check condition and which performs interruption processing on the basis of the machine check interruption signal. The data processor includes a specific code detector which detects a specific interruption signal among the machine check interruption signals, a signal converting circuit for converting the machine check interruption signal into a modified code signal when the interruption signal generated by the machine check interruption is the above-mentioned specific code, and a control portion which assumes a disabled-waiting condition in response to the modified code signal. The operation of the data processor is stopped by placing the control portion in a disabled-waiting condition when interruption of the above-mentioned specific code occurs.

Abstract: 1,4-Dihydropyridine compound having the general formula: ##STR1## wherein R and R' are independently a methyl, ethyl, or propyl group. This compound has a remarkable liver protective action and a low toxicity.

Abstract: A rotary anode type X-ray tube has an enclosure, a target rotatably supported within the enclosure and serving as a source of X-ray generation, a cylindrical rotor connected to the target, for rotating the target by the action of rotating magnetic field produced by a winding provided around the enclosure, a rotary shaft on the central axis of the rotor for rotation of the target, and a stationary cylindrical housing concentric with the rotor interposed between the rotor and the rotary shaft, for supporting the rotary shaft through rolling bearings. In this type of X-ray tube, means is interposed between the rotor and the rotary shaft, for reducing the difference of temperature between the stationary cylindrical housing and the rotor.

Abstract: In a type of continuous casting of steel in which a straight mold is employed and a cast strand is guided while being bent, molten steel is continuously teemed into said straight mold; an unsolidified cast strand with a solidified shell formed on it is guided substantially vertically downward within a range from 3 to 7m from the meniscus of molten steel in said straight mold; then, said unsolidified cast strand being in the vertical position is guided within a range from 1 to 4m while being bent at multiple points by gradually decreasing the radius of curvature of said cast strand for each of successively arranged pairs of bending rollers; then the solidification of said unsolidified cast strand thus bent at multiple points is completed before a spot-straightening point while further guiding said cast strand along a constant curvature, the track length of said constant curvature guide being within a range from 35 to 85% of the length from said meniscus of molten steel in said straight mold up to said spot-str