Abstract: A server device used in a mobile communication system which transfers a multicast packet sent from a sending terminal to a receiving terminal through a packet transfer network, includes: a multicast tree determination unit configured to determine a multicast tree showing a transfer route of the multicast packet; and an instruction unit configured to instruct a multicast-corresponding router within the packet transfer network to prepare a multicast transfer table used for transferring the multicast packet, in accordance with a determined multicast tree.

Abstract: A polygon rendering device carries out a polygon division process for generating, based on polygon data which specifies a polygon to be rendered, a plurality of partial polygon data each specifying one piece of partial polygons which are obtained by dividing the polygon. Then, a rendering process is performed based on the generated partial polygon data so as to generate image data which represents an image of the polygon. Here, each of the partial polygons includes a plurality of triangles which respectively include a vertex of the polygon, and each of the triangles included in each of the partial polygons shares at least one edge with at least one other triangle included in the same partial polygon. In such a manner, the polygon rendering device can render polygons at high speeds.

Abstract: There is provided a technique for controlling drive of a voice coil motor which can select, with priority for effective reduction, any one of heat generation and EMI noise which are presumed to induce a read/write error and for simultaneously realizing the positioning control of magnetic head with higher accuracy during the tracking operation and the high speed access with shortening of the seek operation period. The magnetic disc storage apparatus introducing this technique is provided with a mode to drive with linear control a coil of the voice coil motor from both terminals and a mode to drive one terminal of coil with linear control and the other terminal with pulse width control. Thereby, the coil is driven in the drive mode of linear control during the tracking operation, while one terminal of coil is driven with linear control and the other terminal with pulse width control during the seek operation.

Abstract: In a magnetic disk storage apparatus, when power supply is stopped, a magnetic head can be retracted safely and quickly so as not to be damaged. There are provided a back electromotive a force detector that detects back electromotive forces developed in coils of a voice coil motor for moving a magnetic head when power a supply is stopped, and a brake controller that judges a movement speed of the magnetic head from the detected back electromotive forces, and brakes the voice coil motor when the movement speed is greater than a preset first limited speed.

Abstract: When a control lever is slid to move a driver housed in a quadrangular case in a given direction, the movement of the driver allows the driver to push one of resilient legs of movable contacts corresponding to the direction of movement. This movement resiliently slides the corresponding movable contact along an inner surface of the sidewall of the case and brings the movable contact into contact with a corresponding fixed contact. This structure can provide a multi-directional slide switch of low profile that has a small number of members and is easily assembled.

Abstract: A magnetic disc storage apparatus including a magnetic head for reading information from a storage track on a magnetic storage disc driven to spin, a voice coil motor for moving the magnetic head above the disc, and a magnetic head drive system for executing a position control of the magnetic head by controlling driving current of the voice coil motor by a feedback control while monitoring a state of reading the magnetic head in which the magnetic head drive system includes multi-mode driving means for executing a linear drive mode for controlling, as an analog amount, the driving current of the voice coil motor when an amount of driving to move the magnetic head is small and executing a pulse drive mode for controlling, as a digital amount, the driving current of the voice coil motor when the amount of driving to move the magnetic head is large.

Abstract: Disclosed is a switch, which comprises an insulative plastic case having a cavity formed therein, a metal cover joined to the case to cover over the cavity, and a switching contact section contained in the cavity. In this switch, a surface of the cover opposed to the case has an insulative film formed on at least a region of the surface facing to the cavity. The switch can prevent an externally-originated static elasticity from adversely affecting on the switching contact section to protect a circuit section of a device connected to the switching contact section.

Abstract: In a mobile communication network comprised of a plurality of switching devices and a plurality of base stations connected to the switching devices, while a mobile terminal to wirelessly communicate with the base stations is in a communication by a soft handover, a terminal endpoint of a protocol for control of the soft handover is relocated in changing a switching device to another as a branch/combining point of data on a communication route of the communication.

Abstract: A switch includes a housing, an operating member placed in the housing, and contacting sections accommodated in the housing. The operating member has an operating section made of elastic material to be bowed in every direction and an operating unit coupled to the operating section. When greater force than necessary for changing a state of the contacting sections is applied to the operating section along an operating direction, or when force directed to another direction than the operating direction is applied to the operating section, the operating section bows for itself to absorb extra force.

Abstract: When a control lever is slid to move a driver housed in a quadrangular case in a given direction, the movement of the driver allows the driver to push one of resilient legs of movable contacts corresponding to the direction of movement. This movement resiliently slides the corresponding movable contact along an inner surface of the sidewall of the case and brings the movable contact into contact with a corresponding fixed contact. This structure can provide a multi-directional slide switch of low profile that has a small number of members and is easily assembled.

Abstract: A radio data communications method capable of changing control points located in a network without causing loss of data when a mobile terminal is performing a soft handover. In the radio data communications method in which at least one of a first radio network controller and a second radio network controller performs a soft handover process for allowing a soft handover of a mobile terminal when the mobile terminal is performing soft handover, in downlink radio data communications in which the first radio network controller transmits data to a mobile terminal via a second radio network controller and a base station (or in uplink radio data communications). The first radio network controller or the second radio network controller performing the soft handover process is changed when the mobile terminal is performing the soft handover.

Abstract: The in-vehicle information apparatus 1 according to the present invention for presenting, to a user, information which includes a returning route is composed of the following: a home position holding unit 102 for holding beforehand a position of the user's home; a home arrival time holding unit 103 for holding beforehand a home arrival time of the user; a present position obtainment unit 106 for obtaining a present position of the user; a present time obtainment unit 107 for obtaining a present time; a route search unit 108 for obtaining a returning route from the present position to the user's home position, a required time for the returning route, and a departure time to leave the present position so that the user can get home by the home arrival time; and a presentation unit 111 for comparing the departure time obtained by the route search unit 108 and the present time, and presenting to the user the departure time and the returning route obtained by the route search unit 108, before the departure time is

Abstract: A map displaying apparatus includes a map data storing unit that stores map data, a map drawing data generating unit that generates map drawing data, a sound data inputting unit that stores sound data and inputs sound data into the map drawing data generating unit, a drawing unit that carries out a drawing process for the map drawing data generated by the map drawing data generating unit to generate an image to be displayed on a screen, and a displaying unit that displays the image generated by the drawing unit on an actual screen.

Abstract: A communication system includes an MP high-order switching device which determines, for each of a plurality of switching devices, transmission timing at the which the switching device transmits packet data to a plurality of devices connected to the switching device so that data reception timings at a mobile terminal become simultaneous among the plurality of base stations, and a communication section which, in each of the plurality of switching devices, transmits packet data to the plurality of devices connected to the switching device, based on the determined transmission timing corresponding to the switching device.

Abstract: Mobile communication system 100 according to the present invention comprises control server 1, a plurality of relay routers 21-25, and a plurality of access routers 31-34. In mobile communication system 100, data is multicast by a router existing on paths for delivery of data from correspondent terminal 11 to mobile terminal 51 via respective access routers used in a multipath handover state by mobile terminal 51. Control server 1 performs such a control as to dynamically switch one data multicasting router to another in conjunction with movement of mobile terminal 51 or correspondent terminal 11.

Abstract: A curved surface image processing apparatus 100 according to the present invention that can render an object at higher speed and in higher quality by performing image processing using NURBS data includes: a data input unit 101 for receiving NURBS data; a coordinate transformation unit 102 for performing coordinate transformation on NURBS data; an animation control unit 103 for controlling animation data of each frame to be rendered; a data transformation unit 104 for transforming NURBS data into rational Bezier data; a patch division unit 105 for subdividing a rational Bezier surface patch; a normal determination unit 106 for calculating normals of control points of a divided surface patch; a perspective transformation unit 107 for performing perspective transformation on a divided surface patch; and a rendering unit 108 for rendering a surface patch.

Abstract: A high molecular weight aliphatic polyester copolymer, a high molecular weight aliphatic polyester copolymer containing polylactic acid; process for industrially producing these copolymers; composition of these copolymers; and various uses thereof. These copolymers have practical properties which make the copolymers moldable. They are free from the problem of plasticizer bleeding and can be degraded by microorganisms present in soils or water. They give moldings, such as sheets and films, which combine a sufficient strength with tear resistance. When the copolymers are ones having a branched structure, they give a molding having excellent mechanical properties. The moldings obtained from compositions containing either of these copolymers are excellent in elongation and biodegradability and have a satisfactory balanc therebetween. In particular, blending with one or more other biodegradable resins gives a molding having better moldability.

Abstract: In a map display device, a surface storing unit stores surface information which defines a curved surface having a form that depends on positions of portions of a map which are to be enlarged and/or contracted. A mapping unit maps the map onto the curved surface defined by the surface information. A projecting/displaying unit projects the mapped map onto a flat virtual screen, and displays the projected image. Here, by defining the curved surface so that each part of the curved surface forms an intended angle with a line of sight in the projection, the image is displayed with desired portions enlarged and/or contracted, while maintaining connections of roads. The same effect can also be achieved by projecting the map onto a virtual screen having the form of the curved surface.

Abstract: A lever switch includes a case having a common contact and fixed contacts provided on inner wall opposite to each other. A movable contact made from elastic metal and shaped like the letter “M” has an intermediate section that comes into contact with the common contact. A first arm extends from each one of both ends of the intermediate section. Each one of the ends of the first arms forms a folding-back section, and a second arm is formed at the end of the folding-back section. A contact formed at the end of the second arm comes into contact with the inner wall of the case. Rotation of the lever slides a slider on the bottom plate of the case, and a pushing section provided at each one of both ends of the slider brings the contact into contact with the fixed contact or leaves the contact from the fixed contact.

Abstract: A mobile communication system 100 according to the present invention comprises handover control apparatus 1 and radio terminal unit 10. The handover control apparatus 1 controls handover of a radio terminal unit 10 between access routers 31-34 provided in respective base stations 21-24 for radio communication with the radio terminal unit 10. The handover control apparatus 1 counts the number of relay routers for every candidate access router 32-34 for a destination of the radio terminal unit 10, from a gateway device 52 and determines a COR on the basis of the number of relay routers for every access router 32, 33, 34 thus counted.