Abstract: A racket frame including a grip part, a shaft part, a throat part, and a head part formed hollowly with a fiber reinforced resin and having a weight not less than 100 g nor more than 270 g. The racket frame is provided with a dynamic damper comprising a mass member and a viscoelastic member mounted on a part of a peripheral surface of the mass member. The dynamic damper is mounted inside the grip part by fixing the viscoelastic member to a position of an inner wall of the grip part located within a range of 0.2 L from a free end of the grip part, supposing that a whole length of the racket frame is L in such a way that inside the grip part, at least one part of the mass member is shakable with respect to the inner wall of the grip part.

Abstract: In order to provide a high intensity magnetic field open type MRI apparatus which suppresses electro-magnetic interference to super-conducting coils due to gradient magnetic field coils and high frequency magnetic field coils and to realize stable operation of super-conducting magnet, in a static magnetic field generating magnet 102, a pair of cryostats 117 are connected by a coupling tube 201 and disposed in vertical direction while sandwiching a space 118 where a subject is laid, and in vessels 202 and 203 filled with liquid helium in the respective cryostats super-conducting coils are accommodated. To the cryostats 117 an emergency demagnetizing unit 120 for attenuating magnetic field and a measurement unit 121 for monitoring helium liquid level belong, and signal cables therefor are connected to an inner circuit of the static magnetic field generating magnet 102 via a filter circuit 122.

Abstract: A composite material includes an SiC porous ceramic sintered body, which is formed by preliminarily sintering a porous body, having a coefficient of thermal expansion lower than the coefficient of thermal expansion of copper to construct a network therein. A copper alloy impregnating the porous ceramic sintered body includes copper and one or more additive elements which are prepared to impart a coefficient of thermal conductivity of 160 W/mK or higher to the composite material. The additive elements include up to 5% of at least one element selected from Be, Al, Si, Mg, Ti, Ni, Bi, Te, Zn, Pb, Sn, and mish metal, and also contain unavoidable impurities and gas components.

Abstract: An MRI apparatus having a calibration pulse sequence, wherein a group of pulse sequences for applying test gradient magnetic fields are established from a basic pulse sequence by a gradient echo method of short TR, a group of pulse sequences not applying test gradient fields are established from the basic pulse sequence, a set of three- or four-dimensional data including a time variable is created by using echo signals collected by at least one of the groups, two data sets are created as a whole by inverting the polarity of the test gradient magnetic field, the difference between phase images thereof is determined, the magnitude and time constant of eddy current induced at the fall or rise of the gradient magnetic field are determined from the phase difference image, and the variation of the magnetic field due to eddy current induced at the rise and/or fall of the gradient magnetic field can be measured in a relatively short time with a desired time resolution even if the magnetic field variation is of a very

Abstract: In diffusion weighted imaging, motion monitoring navigation echoes are measured at every measurement of data after applying an RF excitation pulse, and one of them is set as a reference navigation echo. The reference navigation echo and other navigation echoes are one-dimensionally Fourier-transformed, a linear phase gradient thereof is calculated from those data, a linear phase gradient of the reference navigation echo is compared with those of other navigation echoes, and it is judged whether a difference therebetween is within an acceptable value or not. An echo signal corresponding to a navigation echo having the above difference being larger than the acceptable value is judged that correction based on the navigated motion correction is not applicable therein, and the image is produced by using an echo signal measured along with a navigation echo having the difference being the acceptable value or less.

Abstract: Supposing that an upper part of the ball-hitting face (F) is set as a 0-degree position, a string protection member (21) is mounted on at least one portion of a head part of the racket frame in a range from a clockwise 45-degree position to a clockwise 135-degree position and in a range from a clockwise 225-degree position to a clockwise 315-degree position by interposing a viscoelastic member between the string protection member and the racket frame. The moment (Is) of inertia of the tennis racket in a swing direction is set to not less than 450,000 g/cm2 nor more than 490,000 g/cm2, when strings are not tensionally mounted thereon. The moment (Ic) of inertia of the tennis racket in a center direction is set to not less than 15,000 g/cm2 nor more than 19,000 g/cm2, when the strings are not tensionally mounted thereon.

Abstract: Graphite is placed in a case, and the case is set in a furnace. The interior of the furnace is subjected to sintering to produce a porous sintered member of graphite. After that, the case with the porous sintered member therein is taken out of the furnace, and is set in a recess of a press machine. Subsequently, molten metal of metal is poured into the case, and then a punch is inserted into the recess to forcibly press the molten metal in the case downwardly. Open pores of the porous sintered member are infiltrated with the molten metal of the metal by the pressing treatment with the punch.

Abstract: Arranged on both sides of a thin plate are optical displacement gauges that irradiate measurement lights onto surfaces of the thin plate and receive the measurement lights reflected by the surface so as to measure displacements of the surfaces of the thin plate. Variation of thickness of the thin plate is obtained on the basis of the displacements of the surfaces of the thin plate measured by each of the optical displacement gauges. Each of the optical displacement gauges detects the displacement of a respective surface of the thin plate with high accuracy by irradiating the measurement light to the thin plate two times.

Abstract: A rotation position detecting device includes an angular signal generator which generates pulses the cycle period of which is even or equal when a rotating object rotates at a constant rotation speed and a non-pulse portion which corresponds to a reference position, an up-down command circuit for generating an up-down command signal the frequency of which is divided to a half of the frequency of the angular signal, a pair of first counters for counting up or down the clock signal when the up-down command signal changes from a first level to a second level to reset and subsequently counting down the clock signal when the up-down command signal changes from the second level to the first level, a pair of processing circuits for providing a first and second reference values, a pair of counters which generates detection signals when the counted number of the counters becomes smaller than the first or the second reference value.

Abstract: A mass of graphite is placed into a case, and the case is put into a furnace (step S301). The space in the furnace is heated to produce a porous sintered body of graphite (step S302). Thereafter, the case with the porous sintered body contained therein is removed from the furnace, and put into a cavity in a press (step S303). Then, a molten mass of a metal is poured into the case (step S304), and a punch is inserted into the cavity to press the molten metal into the porous sintered body in the case (step S305).

Abstract: When data of plural original images having different echo times are acquired to produce water/fat separated images by performing an processing operations in an MRI apparatus, a partial region of the original image data is specified and the specified region is subjected to the water/fat separation processing. Since noise components included in the specified region are fewer than those in the original image data, errors occurring due to noise components during unwrapping and other such processing operations can be reduced and image quality degradation be suppressed. Therefore, water/fat separated images having an excellent image quality can be produced. When echoes having different echo times are generated, rewind pulses are applied ahead of the readout gradient magnetic fields to equalize the polarities of the readout gradient magnetic fields. Consequently, influence of application of gradient magnetic fields on echo signals can be suppressed and the accuracy of water/fat separation can be improved.

Abstract: The present invention provides a process for producing a difluoromethyl ether derivative simple and efficient process for producing the difluoromethyl ether derivative represented by Formula (1d?) or a difluoromethyl ether derivative represented by Formula (1c?): wherein all the variables are defined in the specification.

Abstract: A tennis racket frame (10), including a sleeve composed of a fiber reinforced resin, having a weight not less than 180 g nor more than 270 g, when strings are not mounted in a ball-hitting face thereof surrounded with a head part thereof. Supposing that the strings are not mounted in the ball-hitting face, a secondary natural frequency (F1) of the racket frame in an in-plane direction thereof is set to not less than 200 Hz nor more than 320 Hz, a secondary natural frequency (F2) thereof in an out-of-plane direction thereof is set to not less than 480 Hz nor more than 650 Hz, and F1/F2 is set to not less than 0.3 nor more than 0.6.

Abstract: A warp knitted fabric is for enclosing a pouched belt constituting an inflatable air belt and folded into a shape of a belt. The warp knitted fabric has good stretching characteristics, strength and comfortableness. The warp knitted fabric includes a knitting yarn 20 and an additional yarn 30 inserted into the knitting yarn 20. The thickness of the additional yarn 30 is 3000 d or below, and the thickness of the knitting yarn 20 is the same or below that of the additional yarn.

Abstract: There is provided an oil or fat composition composed chiefly of triglycerides wherein the amount of medium-chain fatty acids in all the fatty acids composing the oil or fat composition is 5 to 23% by mass and the amount of triglycerides having two medium-chain fatty acid residues in the molecule in all the triglycerides is 1 to 20% by mass. The oil or fat composition is low in body fat accumulation, has equal cooking properties with conventional edible oils and has good flavor and high safety.

Abstract: An acousto optic element comprises optically transparent acousto optic medium 11 having light incoming plane 15, light outgoing plane 16 facing light incoming plane 15, transducer joining plane 13, and inclined plane 14 tilted to transducer joining plane 13; and piezoelectric transducer 20 on which two opposing planes i.e., electrode layers 22 and 23 are formed and the transducer is connected to transducer joining plane 13 of acousto optic medium 11 through one of the electrode layers, wherein a deposited layer or a coating layer is formed on at least one of ultrasonic transducer 20 and the acousto optic medium, the layer preventing ultrasonic waves generated by oscillation of ultrasonic transducer 20 leaking onto acousto optic medium 11 as a leakage-ultrasonic wave and propagating there, thus obtaining a high light-fading ratio.

Abstract: In a magnetic resonance imaging apparatus, in order to suppress generation of artifacts when a linear or non-linear phase error is generated during sampling of the echo signals, a first sequence for acquiring a plurality of echo signals by radiating a radio-frequency magnetic field pulse to an object to be examined, performing phase encoding, while alternating the polarity of a readout gradient magnetic field, and a second sequence for acquiring a plurality of echo signals by repeatedly applying the readout gradient magnetic field while reversing its polarity to that in the first sequence at the same phase encoding direction are performed. Signal processing means performs complex addition of the echo signals having the same phase encoding amount respectively obtained in the first sequence and the second sequence, and reconstructs an image.

Abstract: A liquid crystalline compound represented by Formula (1c′): wherein R1 and R2, rings A1, A2, A3, A4 and A5, Z1, Z2, Z3 and Z4, Y1, Y2, Y3 and Y4, and k, l, m and n are as defined in the specification. Also provided is a liquid crystal composition containing at least one of these liquid crystalline compounds.

Abstract: There is provided an oil or fat composition composed chiefly of triglycerides wherein the rate of middle-chain fatty acids in all the fatty acids composing the oil or fat composition is 5 to 23% by mass and the rate of triglycerides having two middle-chain fatty acid residues in the molecule in all the triglycerides is 1 to 20% by mass.

Abstract: The present invention provides a regulator for the amount of body fat containing a medium chain triglyceride, which can be used conveniently without any concern about the side effect and any restraint on the diet. 90% by mass or more of fatty acids constituting medium chain triglycerides are comprised of saturated fatty acids having 8 and 10 carbon atoms, the ratio by mass of the saturated fatty acids having 8 carbon atoms to the saturated fatty acids having 10 carbon atoms is 60:40 to 85:15, and the saturated fatty acids having 8 carbon atoms is present in an amount of 60 to 85% by mass of the total fatty acids bonded to the triglycerides at the 2-position. In addition, the present invention relates to a food product containing the above-mentioned regulator for the amount of body fat, which product is capable of regulating the body fat.