Abstract: [Problem] In a terminal station and a base station, in which a plurality of wireless communication units supporting different communication performances are mounted, it is possible to select and switch wireless communication unit which responds to a congested condition of wireless communication and a wireless communication quality, and further improves a wireless resource usage efficiency.

Abstract: The each AP includes a control unit that detects, as the wireless environment information, a signal detection level for one or more neighboring APs positioned in the neighborhood of the AP and notifies the detected signal detection level to the central coordinator, and controls the ATT value by the setting in the central coordinator; and the central coordinator includes a parameter calculation unit that calculates the ATT value for each the APs, based on the signal detection level for each the neighboring wireless access point notified from the plurality of APs and based on an RSSI threshold at which each the APs is able to secure a prescribed service area.

Abstract: Included are n antenna sets; n antenna switch units; n signal change units each changing a combination of one or more of a phase, a timing, a frequency, and a power of each signal transmitted/received in n antennas being selected from the antenna sets; a notification unit outputting a notification signal, in which control information on the antenna switch units and the signal change units according to a target terminal being a destination/source of the signals transmitted/received in the n antennas, are arranged according to a switch time of each of the antenna switch units and a change time of each of the signal change units; and a control unit sequentially starting control of switching by each of the antenna switch units and control of changing by each of the signal change units in order in which the control information on the each unit in the notification signal is notified.

Abstract: [Problem] In a terminal station and a base station, in which a plurality of wireless communication units supporting different communication performances are mounted, it is possible to select and switch wireless communication unit which responds to a congested condition of wireless communication and a wireless communication quality, and further improves a wireless resource usage efficiency.

Abstract: Provided are n antennas and n power change units; a power control unit; a power change management unit managing a common power change amount and an individual power change amount; a common power notification unit notifying the power control unit of the common power change amount in accordance with a target terminal; an individual power notification unit notifying the power control unit in advance of the individual power change amount in accordance with the each terminal at a prescribed timing, in which the power control unit stores the individual power change amount in a storage unit, and performs control of power changing by adding up the common power change amount in accordance with the target terminal, which is notified from the common power notification unit, and the individual power change amount.

Abstract: The each AP includes a control unit that detects, as the wireless environment information, a signal detection level for one or more neighboring APs positioned in the neighborhood of the AP and notifies the detected signal detection level to the central coordinator, and controls the ATT value by the setting in the central coordinator; and the central coordinator includes a parameter calculation unit that calculates the ATT value for each the APs, based on the signal detection level for each the neighboring wireless access point notified from the plurality of APs and based on an RSSI threshold at which each the APs is able to secure a prescribed service area.

Abstract: Provided are n antennas and n power change units; a power control unit; a power change management unit managing a common power change amount and an individual power change amount; a common power notification unit notifying the power control unit of the common power change amount in accordance with a target terminal; an individual power notification unit notifying the power control unit in advance of the individual power change amount in accordance with the each terminal at a prescribed timing, in which the power control unit stores the individual power change amount in a storage unit, and performs control of power changing by adding up the common power change amount in accordance with the target terminal, which is notified from the common power notification unit, and the individual power change amount.

Abstract: Included are n antenna sets; n antenna switch units; n signal change units each changing a combination of one or more of a phase, a timing, a frequency, and a power of each signal transmitted/received in n antennas being selected from the antenna sets; a notification unit outputting a notification signal, in which control information on the antenna switch units and the signal change units according to a target terminal being a destination/source of the signals transmitted/received in the n antennas, are arranged according to a switch time of each of the antenna switch units and a change time of each of the signal change units; and a control unit sequentially starting control of switching by each of the antenna switch units and control of changing by each of the signal change units in order in which the control information on the each unit in the notification signal is notified.

Abstract: A manufacturing method of an electric contact and manufacturing equipment of the electric contact. A contact and a metal base are superimposed and support by a jig, and a rotational tool, which rotates at a predetermined speed and advances/retracts to/from the jig, is pressed into a surface, which is not contacted with the contact, of the metal base while being rotated, so that the contact and the metal base are joined by solid state diffusion welding by using frictional heat generated by friction between the rotational tool and the metal base, and then the rotational tool is retracted from the metal base.

Abstract: A manufacturing method of an electric contact and manufacturing equipment of the electric contact. A contact and a metal base are superimposed and support by a jig, and a rotational tool, which rotates at a predetermined speed and advances/retracts to/from the jig, is pressed into a surface, which is not contacted with the contact, of the metal base while being rotated, so that the contact and the metal base are joined by solid state diffusion welding by using frictional heat generated by friction between the rotational tool and the metal base, and then the rotational tool is retracted from the metal base.

Abstract: A vertical wafer supporting boat is provided in which adequate reaction gas is supplied to the portion of a wafer surface to be treated which is inserted in holding grooves in members of the wafer supporting boat during the heat treatment and thus uniform heat treatment is achieved across the surface of each wafer. The particular groove shape preferably exploits the rotation of the boat in a vertical furnace to thereby uniformly supply the reaction gas on the entire surface to be treated of each of the wafers disposed in the boat. The holding grooves are inclined relative to a direction tangent to a wafer edge in order that the clearance facing the surface to be treated of a wafer is profiled to have an edge-like space by gradually increasing the width in the tangential direction of the wafer and, preferably, the internal groove surface opposed to the surface to be treated of the wafer is inclined to increase in width toward the center of the wafer.

Abstract: A gyro compass having a gyro case housing therein a gyro and supported with freedom of three axes, functions for outputting a signal corresponding to an inclined angle of the gyro spin axis relative to the horizontal plane, and a function for applying a torque around a vertical axis of the gyro case in proportion to an input signal. A controller is supplied with a signal corresponding to the inclined angle and a latitude value at which the gyro compass is located, and a constant relative to the input latitude value is determined by the controller after the gyro compass is energized. A signal, resulting from differentiating the signal corresponding to the inclined angle during a predetermined time, is added to the product of the signal corresponding to the inclined angle and the constant. This added signal functions as the input signal for the gyro, whereby a constant optimum north-seeking movement is carried out regardless of the change of the latitude value.

Abstract: A gyro compass having a gyro case housing therein a gyro and supported with freedom of three axes, functions for outputting a signal corresponding to an inclined angle of the gyro spin axis relative to the horizontal plane and a function for applying a torque around a vertical axis of the gyro case in proportion to an input signal, and a controller supplied with the signal corresponding to the inclined angle and a latitude value at which the gyro compass is located, wherein a constant relative to the input latitude value is set by the controller after the gyro compass is energized, a signal, which results from differentiating the signal corresponding to the inclined angle during a predetermined time, is added to a signal, which results from multiplying the signal corresponding to the inclined angle with the constant and an added result is set as the input signal, whereby a constant optimum north-seeking movement is carried out regardless of the change of the latitude value to thereby reduce a settle time.

Abstract: A thermoplastic polyurethane resin is prepared by the reaction of(A) p-phenylene diisocyanate,(B) a hydroxyl terminated poly(hexamethylene carbonate) polyol having a molecular weight of 850 to 5000 and(C) a short chain polyol having 2 to 10 carbon atoms as the chain extending agent,the molar ratio of (B) : (C) being 1:2 to 1:0.05, and the molar ratio of isocyanate groups : total active hydrogen groups being 0.93:1 to 1.20:1.

Abstract: A gyro compass having a gyro case incorporating a gyro of which the spin axis is substantially horizontal, a vertical ring disposed around the outer periphery of the gyro case and for rotatably supporting the gyro case around a vertical axis, a follow-up pickup for detecting an angular displacement between the gyro case and the vertical ring around the vertical axis, an accelerometer having an input axis parallel to the spin axis, a vertical torquer mounted on the vertical ring for applying a torque of magnitude proportional to an input signal to the gyro case around the vertical axis, and a control apparatus for receiving an output signal of the accelerometer and for supplying its output to the vertical torquer, in which during a predetermined time after the gyro compass is started to operate, the output signal from the accelerometer is differentiated to produce a differentiation signal which is then supplied to the vertical torquer to reduce a settling time of the north-seeking action.

Abstract: The method of bonding silver-based contact is disclosed. A silver-based contact is brought into contact with a support, at least the surface of which is made of a cupreous material, with a pressure of less than 1 kgf/cm.sup.2 exerted therebetween. The contact and support are heated in a non-oxidizing atmosphere at a temperature of more than 700.degree. C.

Abstract: An electrical contact manufacturing method and apparatus with which entrance of the contact into a base metal plate is prevented during forming of the contact to thereby increase the service life of the contact. A contact material is welded in the form of a spot to a predetermined position on a base metal plate. The contact material is depressed from above by an upper punch to mold the electrical contact. Simultaneously, the portion of the base metal plate lying directly below the contact is depressed with a lower punch to raise that portion of the base metal plate and the contact.