Abstract: A method produces a hairpin single-stranded RNA molecule capable of inhibiting expression of a target gene, including the step of reacting a first single-stranded oligo-RNA molecule represented by formula (I) with a second single-stranded oligo-RNA molecule represented by formula (II) in a mixed solvent including a buffer solution and a hydrophilic organic solvent in the presence of a dehydration condensation agent: 5?-Xc-Lx1 . . . (I) and Lx2-X—Y-Ly-Yc-3? . . . (II), wherein the dehydration condensation agent is selected from the group consisting of a triazine-based dehydration condensation agent, a uronium-based dehydration condensation agent including an N-hydroxy nitrogen-containing aromatic ring structure, a carbodiimide-based dehydration condensation agent, a 2-halopyridinium-based dehydration condensation agent, and a formamidinium-based dehydration condensation agent.

Abstract: To set a scale for three dimensional data composed from point cloud data: a plurality of reference objects (22) of sizes and shapes known in advance are disposed around an object (20) under measurement; image data or position data obtained by imaging the object (20) under measurement together with the plurality of reference objects (22) from various angles is input to a computer (30); the known sizes and shapes of the reference objects (22) are input to the computer (30); and the computer (30) acquires point cloud data for the object (20) under measurement and each reference object (22) from a plurality of pieces of the image data or a plurality of pieces of the position data, determines, as reference objects, objects in the point cloud data having sizes and shapes within prescribed error ranges with respect to the sizes and shapes input for the reference objects (22), and sets the overall scale of the point cloud data by extending/contracting and/or twisting the point cloud data such that each of the determi

Abstract: A monopulse antenna apparatus and antenna structure comprising a single horn having four dielectric bars which are internally inserted into the horn and symmetrically positioned along the axis of the horn. Each one end of the bars are fixed to the end wall of a rectangular waveguide and the other end is extending outwardly along the axis of the rectangular waveguide, thus these four dielectric bars are excited by externally applied electromagnetic waves. The four dielectric bars respectively cause the electric field to converge on the bars, and the single horn with four internally inserted dielectric bars acts as if it is partitioned into four horns.

Abstract: A grommet which is formed from a self-lubricating rubber, and can be fixed by means of a wire such as electric wires and an adhesive tape. The rubber grommet (10) is fixed to the electric wire (14) with the adhesive tapes (12, 12) and inserted into a through hole (22) penetrating through a partition (20) to provide sealing between the electric wire (14) and an inner wall of the through hole (22). Rubber forming the grommet (10) is a self-lubricating rubber containing an oily polyalkyl carbonate, which is represented by the following chemical formula: Ri—O—CO—O—[CH2CH2C(CH3)HCH2CH2—O—CO —O]n—Ri wherein n is an integer of 1 to 8, and Ri represents (i—C7H15).

Abstract: Two antenna units (11) and (12) are located on a pedestal device (13) provided rotatably around an azimuth angular axis thereof, and a rotating mechanism for rotating in an azimuth angular direction and an elevation angular direction respectively is provided in each of the antenna units (11, 12). The antenna units (11) and (12) execute, for the purpose of communicating with the orbital satellites (81) and (82) respectively, satellites tracking by adjusting its own azimuth angle and elevation angle while moving in association with rotation of the rotating mechanism (14) of the pedestal device (13).

Abstract: A balun is used in electric communications for supplying power to a balanced line from an unbalanced circuit, a power feeder consisting of a microstrip line. Two microstrip center conductors are connected to the balanced line, and are supplied with signals of opposite phases. This makes it possible to convert an unbalanced current flowing through the microstrip line to a balanced current flowing through the balanced line.

Abstract: To obtain a high-performance antenna apparatus free from the shift of its focusing point, there are provided a plurality of pairs of horns, horns of each pair are arranged at opposite positions with respect to the center of the plurality of horns, and each pair of horns operates at a different frequency band.

Abstract: A mobile communication terminal equipment is mounted in a vehicle and can utilize both the satellite and terrestrial communication systems. The mobile communication terminal equipment includes a satellite transceiver and a portable set. The satellite transceiver has a satellite transmission/reception circuit. As required, the portable set is disconnected from the satellite transceiver to be carried by the user. The portable set includes a terrestrial transmission/reception circuit, a signal input/output circuit and a connection selecting switch. The connection selecting switch is automatically controlled to connect the signal input/output circuit selectively to one of the satellite and terrestrial transmission/reception circuits. When the satellite transmission/reception circuit is in connection with the signal input/output circuit, the communication through the satellite wireless communication system can be carried out.

Abstract: A chip carrying member (1) such as a film carrier carrying a chip (10) and elastic spacers (2, 3) are stacked to form an elementary unit with adjusting its thickness. By using an aligning aperture (12) of a thin sheet (1), a plurality of the elementary units are stacked to form a laminated structure. From a side surface of the laminated structure, leads (13) are extended to be connected to a wiring board (241), or after the leads (13) are buried in an insulator (8), the leads (13) and insulator (8) are abraded to form a coplanar surface and then a wiring layer (82) for interconnecting is formed on the abraded surface. A usual chip can be mounted on the chip carrying member (1) without any work with a high accuracy in alignment of the lamination and furthermore with a high accuracy in a lamination pitch of the chip carrying member (1), so that the leads (13) of the chip (10) can be wired precisely and finely. A low cost and high density three-dimensional packaging structure can be realized.

Abstract: An antenna system having a main reflector, a sub-reflector, and a plurality of horns for radiating different frequencies includes a beam waveguide system which cancels cross polarization otherwise inherent in the system. If the antenna system uses a non-rotationally-symmetric sub-reflector the cross polarization caused thereby is cancelled by the beam waveguide system having at least two focusing reflectors and selected parameters. Alternatively the beam waveguide system can be used with a rotationally symmetric and stationary sub-reflector by being positioned to reflect said beam on the axis of the main reflector. Either the horns or the focusing reflectors may be rotatably switched, the other group being stationary.

Abstract: An antenna system having a main reflector, a sub-reflector, and a plurality of horns for radiating different frequencies includes a beam waveguide system which cancels cross polarization otherwise inherent in the system. If the antenna system uses a non-rotationally-symmetric sub-reflector the cross polarization caused thereby is cancelled by the beam waveguide system having at least two focusing reflectors and selected parameters. Alternatively the beam waveguide system can be used with a rotationally symmetric and stationary sub-reflector by being positioned to reflect said beam on the axis of the main reflector. Either the horns or the focusing reflectors may be rotatably switched, the other group being stationary.

Abstract: An earth station antenna is employed for telecommunicating with a satellite in combination with an automatic tracking apparatus. The antenna is a dual reflector antenna which comprises a main reflector, a sub-reflector and a primary radiator, and the used frequency band of the antenna is at least 1.8 octaves. A parameter t of the antenna, defined by a configuration of the primary radiator is less than 0.3 at the lowest operating frequency. The phase center of the primary radiator, at a low frequency within the operating frequency range, is made to correspond with the focus of the sub-reflector.The above parameter t is defined by: ##EQU1## where: .lambda.: wavelength in free space,D.sub.h : aperture diameter of the primary radiator,L.sub.h : center axial length from the radiator apex to the radiator aperture plane, andL.sub.s : length from the radiator aperture plane to the bottom surface of the sub-reflector.

Abstract: Each of a transmitter and a receiver connected to an antenna through a duplexer includes a .pi./2 and a .pi. polarizer and an ortho-mode transducer (OMT) serially interconnected. In the receiver the OMT is connected at one output to a branching circuit and at the other output to a coupler which is connected to the branching circuit through a transfer circuit. In the transmitter, the OMT is connected at one input to a branching circuit and at the other input to a coupler subsequently connected to the branching circuit through a transfer circuit.

Abstract: A mobile communication terminal equipment is mounted in a vehicle and can utilize both the satellite and terrestrial communication systems. The mobile communication terminal equipment includes a satellite transceiver and a portable set. The satellite transceiver has a satellite transmission/reception circuit. As required, the portable set is disconnected from the satellite transceiver to be carried by the user. The portable set includes a terrestrial transmission/reception circuit, a signal input/output circuit and a connection selecting switch. The connection selecting switch is automatically controlled to connect the signal input/output circuit selectively to one of the satellite and terrestrial transmission/reception circuits. When the satellite transmission/reception circuit is in connection with the signal input/output circuit, the communication through the satellite wireless communication system can be carried out.