Abstract: An NMR imaging method for imaging with isotropic pixel resolution and a short scan time by applying a non-square scan matrix matched to the sectional shape of a subject, wherein a non-square scan matrix is set with different vertical and horizontal dimensions corresponding to the sectional form of a subject and scan data is collected under two-dimensional Fourier transformation by setting the longer sides of the matrix in the direction of projection and the shorter sides in the warp direction, while simultaneously displaying an image in a non-square image matrix wherein a length corresponds to projection width A on one side and whose length corresponds to M/N time of projection width A (where M: number of view, N: number of sample in the direction of projection, and M<N) on the other.

Abstract: A magnetic head device incorporated in magnetic recording and playback equipment for recording and reproducing information from a magnetic disk. The device has a magnetic head which is formed with a plurality of grooves in the surface thereof that is to face a magnetic disk. The grooves reduce the friction acting between the head and the disk during operation and thereby allows the head to slide on the disk stably with a minimum of spacing loss.

Abstract: The present invention relates to a high elongation, high strength pitch-type carbon fiber which has an improved handleability. The carbon fiber of this invention has a crystalline structure arranged in such a manner that the angle (.phi.) is 24.degree.-38.degree.; the stack height (L.sub.c) is 19-35 .ANG.; and, the interlayer spacing (d.sub.002) of the X-ray structural parameter is 3.45-3.50 .ANG.. The atomic ratio of oxygen to carbon on the surface of the fiber measured by X-ray photoelectron spectrometry is 0.1-0.35. The total oxygen content in the fiber is 0.01-0.2 wt. %; and, the elongation is 1.0% or more. The high elongation, high strength pitch-type carbon fiber prepared in accordance with the present invention can be used, for example, as a reinforcing fiber for light-weight structural material employed in the aerospace, automotive and architectural industries.

Abstract: A dual magnetic head capable of reducing unneccessary magnetic flux developed in erase cores. The dual magnetic head includes a first read/write core (30) having a first gap width (34) and extending in a track direction in which the tracks will be formed on a magnetic recording medium, a second read/write core (10) having a second read/write gap (14) with a width greater than the first gap width, and juxtaposed to the first read/write core (30) in a perpendicular direction to the track direction; and an erase core (20) having a pair of erase gaps (24, 25) located at opposite ends of the second read/write gap (14) with respect to the perpendicular direction, the erase core (20) being juxtaposed to the first read/write core (30) in the perpendicular direction and juxtaposed to the second read/write core (10) in the track direction, at least one of the facing surfaces of the erase core (20) which define the erase gaps (24, 25) therebetween being provided with an undulation.

Abstract: A novel sulfone compound represented by the general formula (I) or (II) is disclosed. A sizing liquid containing the sulfone compound is applied to reinforcing fibers for improving compatibility thereof to a matrix resin into which the fibers are to be incorporated to form a fiber-reinforced composite material.

Abstract: A two component-type curing agent composition is disclosed which comprises a first curing agent which is capable of cross-linking an epoxy resin and which is at least one member selected from primary amines, phenolic compounds and acid anhydrides, and a second curing agent which is at least one compounds represented by the following general formula: ##STR1## wherein X is --CR.sub.1 R.sub.2 --, --CO--, --COO--, --SO.sub.2 --, --SO--, --S--, --O--, --NR.sub.1 --, --SiR.sub.1 R.sub.2 -- or --POR.sub.1 -- where R.sub.1 and R.sub.2 each stands for hydrogen, a lower alkyl or a phenyl; Y and Y' each stands for hydrogen, a lower alkyl or an electron attracting group; R is a lower alkyl; and m and n each is an integer of 1-4.

Abstract: A novel process is disclosed in which a membrane of a fluorinated resin containing a pendant precursor ion exchange group represented by the formula:--SO.sub.2 Xwherein X rerpesents a halogen atom, is contacted with a aqueous solution containing specific amounts of at least one alkali metal or alkaline earth metal hydroxide and at least one specific water soluble organic compound to thereby hydrolyze the precursor group while causing a specific membrane volume increase. In the process of the present invention , since the ion exchange membrane is swelled, while being hydrolyzed, to a desired degree, the rate of hydrolysis of precursor ion exchange groups is high, so that a final ion exchange membrane is free of wrinkles formed during the hydrolysis step of a conventional process and during the electrolytic operation, thereby enabling the final membrane to ensure advantageously low cell voltage and stable, prolonged electrolytic operation.

Abstract: An improved process for polymerizing butene-1 in the presence of a polymerization catalyst composed of (a) a catalyst component containing titanium and halogen as essential constituents and (b) an organometallic compound, wherein the improvement comprises bringing said catalyst component into contact with an activity inhibitor when said catalyst component is activated or after said catalyst component has been activated with said organometallic compound, and subsequently polymerizing butene-1.

Abstract: An apparatus for photolithographically transferring, onto a plate-like member a pattern corresponding to picture elements of a liquid crystal display device and a pattern corresponding to driving circuits and so on, by use of a photomask. The surface of the plate-like member is divided into different areas and, each time one of the different areas of the plate-like member is subjected to the pattern transfer operation, the plate-like member is fed stepwise relative to an optical system provided to project an image of the photomask onto the plate-like member. At the same time, the range of the photomask pattern which is to be transferred onto the plate-like member is changed.

Abstract: A new thermocurable composition is disclosed which comprises a Bisphenol A-type epoxy resin having a number average molecular weight of 650-1300, 10-40% by weight of the Bisphenol A-type epoxy resin having an epoxy equivalent of 180-195; and a curing agent capable of cross-linking the epoxy resin. The curing agent is preferably a compound represented by the following general formula: ##STR1## wherein X is --CR.sub.1 R.sub.2 --, --CO--, --COO--, --SO.sub.2 --, --SO--, --S--, --O--, --NR.sub.1 --, --SiR.sub.1 R.sub.2 -- or --POR.sub.1 -- where R.sub.1 and R.sub.2 each stands for hydrogen, a lower alkyl or a phenyl; Y and Y' each stands for hydrogen, a lower alkyl or an electron attractive group; R is a lower alkyl; and m and n each is an integer of 1-4, or a mixture thereof with a primary amine, a phenolic compound or an acid anhydride.

Abstract: A novel process is provided in which a membrane of a fluorinated resin having pendant ion exchange precursor groups represented by at least one formula selected from the group consisting of:--SO.sub.2 X and --CYwherein X represents a halogen atom or --OR in which R represents an alkyl group having 1 to 4 carbon atoms, and Y represents a nitrogen atom or --OX in which X is as defined above, is contacted with an aqueous solution of a basic organic compound for a period of time sufficient to perform the hydrolysis of the precursor groups. In the process of the present invention, a complicated pre-swelling step as conventionally conducted in the art is advantageously omitted. Nevertheless, an ion exchange membrane having excellent dimensional stability and performance stability can be obtained. In addition, when the obtained membrane is used in an electrolytic cell, the cell exhibits an extremely low cell voltage.

Abstract: An apparatus for photolithographically transferring, onto a plate-like member a pattern corresponding to picture elements of a liquid crystal display device and a pattern corresponding to driving circuits and so on, by use of a photomask. The surface of the plate-like member is divided into different areas and, each time one of the different areas of the plate-like member is subjected to the pattern transfer operation, the plate-like member is fed stepwise relative to an optical system provided to project an image of the photomask onto the plate-like member. At the same time, the range of the photomask pattern which is to be transferred onto the plate-like member is changed.

Abstract: A sizing agent for a carbon fiber comprized mainly of an unsaturated urethane compound produced by a reaction of an unsaturated alcohol with an isocyanate which is able to couple the carbon fiber with an unsaturated polyester resin or vinylester resin is disclosed. The preferably unsaturated alcohols are allylalcohols and reaction products of an unsaturated carboxylic acids with an alkyleneoxides.

Abstract: An exposure apparatus for exposing in a step-and-scan manner a plate-like member to a pattern with radiation so that images of the pattern are transferred onto different regions on the plate-like member. The apparatus includes a mirror imaging optical system for projecting the image of the pattern onto the plate-like member, a carriage for scanningly moving, at the time of exposure, the plate-like member relative to the mirror imaging system, and a stage movably mounted on the carriage for step-feeding the plate-like member at the time of non-exposure so as to sequentially place the different regions of the plate-like member at an exposure station under the mirror imaging system. A locking system is provided to lock the stage relative to the carriage by use of vacuum, at the time of exposure, whereby unwanted displacement of the plate-like member relative to the carriage at the time of scanning exposure is prevented.

Abstract: An exposure apparatus for exposing in a step-and-scan manner a plate-like member to a pattern with radiation so that images of the pattern are transferred onto different regions on the plate-like member. The exposure apparatus includes a mirror imaging optical system for projecting the image of the pattern onto the plate-like member. Also, the exposure apparatus includes a carriage for scanningly moving, at the time of exposure, the plate-like member relative to the mirror imaging optical system and a stage for step-feeding the plate-like member at the time of non-exposure so as to sequentially place the different regions of the plate-like member at an exposure station under the mirror imaging system. The stage is mounted on the carriage, and the movement of the carriage is guided by linear air-bearings.

Abstract: A process for producing a propylene polymer having a carbonyl group at the terminal, said process comprising polymerizing propylene to give a living propylene polymer in the presence of a catalyst composed of beta-diketone vanadium chelate and an aluminum compound represented by the formula R.sub.2 AlX (wherein R is a hydrocarbon group having 1 to 8 carbon atoms and X is a halogen atom), and reacting the living propylene polymer with a carbonylating agent.

Abstract: A process for homopolymerizing an olefin or copolymerizing an olefin with another olefin in the presence of a catalyst composed of(a) a solid catalyst component containing magnesium atoms, titanium atoms, halogen atoms, and an electron donor compound,(b) an organoaluminum compound represented by the formula R.sup.1 R.sup.2 R.sup.3 Al (wherein R.sup.1, R.sup.2, and R.sup.3, which may be the same or different, each denote a C.sub.1-20 alkyl, alkenyl, cycloalkyl, aryl, aralkyl, or alkoxy group, or a hydrogen atom;(c) an organoaluminum compound represented by the formula R.sup.4.sub.3-n AlX.sub.n (wherein R.sup.4 denotes a C.sub.1-20 alkyl, alkenyl, cycloalkyl, aryl, aralkyl, or alkoxy group; X denotes a halogen atom; and n.gtoreq.1),(d) an electron donor compound containing a nitrogen atom, sulfur atom, oxygen atom, or phosphorus atom, and(e) an aromatic ester compound.

Abstract: A step-and-repeat type exposure apparatus for photoprinting patterns on different portions of a workpiece, for the manufacture of a large-size pattern to be used in a panel display device, for example. Plural masks having respective patterns are used and, each time the pattern of one of the masks is transferred onto corresponding one of the portions of the workpiece, the workpiece is displaced while, on the other hand, the used mask is replaced by a subsequent mask. For the exposure of a first one of the portions of the workpiece, the first portion is aligned with a corresponding first mask, set at a reference position, by use of alignment marks provided on the first portion and the first mask. In regard to the exposure of a second one of the portions of the workpiece, the workpiece is moved while monitoring the position thereof by use of a laser interferometer, so that the second portion is brought into alignment with a second mask placed at the reference position.

Abstract: Modified polymer compositions comprising elastomers blended with not more than 50 parts by weight of a crystalline polyolefin are prepared by reaction of the polymers with an unsaturated carboxylic acid or its acid anhydride. The modified composition optionally containing a filler, is particularly suitable for laminating to metals and other polymers; laminates show superior hot water resistance, salt water resistance and thermal shock resistance.

Abstract: A catalyst component for polymerization of olefins which is prepared by contacting a product obtained by contacting (A) a magnesium alkoxide, (B) a silicon compound having the hydrogen-silicon bond, and (C) a titanium compound with one another, with (D) (a) a hydrocarbon, (b) a halogenated hydrocarbon, and/or (c) a halide of an element selected from the elements of Groups IIIa, IVa, and Va of the Periodic Table.