摘要:
A parallel glass which is a prism having a parallelogram-shaped cross section in an x-y direction, and parallel glasses which are prisms having a parallelogram-shaped cross section in the x-y direction and each include grooves formed in one surface in a z direction perpendicular to the x-y direction, are stacked in direct contact with each other such that the grooves are located on the inside, and light trying to enter the grooves is subjected is total reflection, thereby changing incident parallel beams with a pitch of 13 mm into emergent parallel beams with a pitch of 1 mm.
摘要:
A disc drive device able to increase the number of plastic flexible cantilever beams and improve a centering holding function of a disc to enable handling of high speed revolution, that is, a disc drive device having a plastic turntable mounted on a shaft of a spindle motor, wherein this turntable has a disc hole engagement projection provided with a ring-shaped projection and a plurality of centering portions which extend from this ring-shaped projection outwardly in a diametrical direction and have guide surfaces from which an edge of a disc hole easily slides off, a disc carrying portion, through holes formed defined between adjoining centering portions, and flexible cantilever beams extending in the through holes.
摘要:
A terminal for performing multiple access transmission suitable to a transmission path having varied characteristics includes a transmission/reception section, a control unit, a transfer management section, and an external interface section. Specifically, the terminal refers to an IGMP (MLD) message received by the transmission/reception section to classify a transmitter host and a relay device of the message based on a characteristic of the transmission path, and performs a multiple access transmission of a multicast packet in a form suitable to the characteristic of the transmission path.
摘要:
A communication bandwidth is divided into a beacon period in which all master stations compete for transmission of a beacon packet, a first carrier sense multiple access (CSMA) period in which only authorized specific stations are allowed to compete for access, and a second CSMA period in which all stations are allowed to compete for access. The master stations exchange information with each other about a communication bandwidth being used in the first CSMA period, thereby calculating a communication bandwidth which can be used by each communication system in the first CSMA period, based on the information.
摘要:
Provides a terminal for performing multiple access transmission suitable to a transmission path having varied characteristics. The terminal (100) includes a transmission/reception section (201), a control unit (204), a transfer management section (206), and an external interface section (203). The terminal (100) refers to an IGMP (MLD) message received by the transmission/reception section (201) to classify a transmitter host and a relay device of this message based on the characteristic of the transmission path, and performs a multiple access transmission of a multicast packet in a form suitable to the characteristic of the respective transmission path.
摘要:
The present invention provides a pattern formation method comprising a step of forming on a substrate a film of a first photosensitive material having low sensitivity to a light beam with a main wavelength at h-line emitted from a mask-less drawing exposure apparatus but having high sensitivity to an energy light beam containing ultraviolet light; a step of forming on the first photosensitive material a film of a second photosensitive material having higher sensitivity to a light beam with the main wavelength at h-line; a step of drawing a second pattern on the second photosensitive material with the mask-less direct drawing exposure apparatus; a step of developing the second photosensitive material; and a step of exposing to a light beam the second photosensitive material with the second pattern formed thereon and the first photosensitive material in batch to form a target first pattern on the first photosensitive material.
摘要:
A communication bandwidth is divided into a beacon period in which all master stations compete for transmission of a beacon packet, a first carrier sense multiple access (CSMA) period in which only authorized specific stations are allowed to compete for access, and a second CSMA period in which all stations are allowed to compete for access. The master stations exchange information with each other about a communication bandwidth being used in the first CSMA period, thereby calculating a communication bandwidth which can be used by each communication system in the first CSMA period, based on the information.
摘要:
A communication band is divided into: a beacon period in which every master station transmits a beacon packet in competition with one another; a guaranteed-band period (e.g., a TDMA period or an FDMA period) in which only a specific permitted station is allowed access; and a CSMA period in which every station is allowed access in competition with one another. Plural master stations exchange information of a communication band used in the guaranteed-band period with each other, and based on the respective information, a communication band available to the master station's own communications system in the guaranteed-band period is calculated.
摘要:
A terminal of the present invention comprises a control frame detection portion of detecting a control frame issued from a control station, a control frame memory portion of storing control information contained in the control frame, a substitute frame issuance determination portion of determining to issue a substitute frame when the control frame is not detected until a predetermined first time period is elapsed, and a substitute frame issuance portion of creating a frame which is the same as or equivalent to the control frame, as the substitute frame, based on the control information stored in the control frame memory portion when the substitute frame issuance determination portion determine to issue the substitute frame, and issuing the created substitute frame.
摘要:
A turntable assembly not requiring use of plastic centering hooks, enabling simplification of the mold structure, and enabling attachment of the leaf springs imparting elastic spring force in the disk centering mechanism even after fitting the center hole of the turntable over the motor shaft, wherein the turntable assembly has a motor having a projecting motor shaft and a turntable having a center hole into which the projecting portion of the motor shaft is inserted and a magnet holding groove formed at a disk hole mating hub around the center hole and holding a permanent magnet for clamping an information storage disk placed on the turntable in the magnet holding groove, the disk centering mechanism having a plurality of spring seats at spring flexing spaces formed at intervals in the circumferential direction of the disk hole mating hub 21, each of the spring seats being provided with a centering leaf spring having a vertically descending piece protruding slightly outward in the radial direction from the outer circumference of the disk hole mating hub.