摘要:
A method for manufacturing small magnetic disks from a nonmagnetic large disk. A nonmagnetic large disk is first prepared, and subjected to at least one step of a manufacturing process necessary for manufacturing a magnetic disk from a nonmagnetic substrate. The manufacturing process may comprise the steps of applying at least one underlayer to the substrate, applying the layer of magnetic material to the underlayer, applying the protective layer to the layer of magnetic material, applying the lubricating layer to the protective layer, carrying out a texture treatment, polishing the underlayer, and burnishing the protective layer, and carrying out a levitation and characteristic test. After at least one of these steps, the large disk is divided into a plurality of the small disks. Accordingly, it is possible to manufacture small magnetic disks, by the use of manufacturing equipment designed to manufacture large magnetic disks.
摘要:
In a magnetic recording medium wherein a magnetic recording layer for storing information, a carbon type protective layer for preventing damage of the magnetic recording layer and a lubrication layer are sequentially formed on a non-magnetic substrate, the carbon protective layer has a relatively smaller hydrogen content on the side nearer the lubrication layer than on the side nearer the magnetic recording layer. In a magnetic head slider having an electromagnetic conversion device mounted thereto, a carbon protective layer is laminated on at least a sliding surface side, and a lubrication layer is disposed on the carbon type protective layer. In a recording apparatus including a recording medium for storing information and a magnetic head for recording or reproducing information to and from the memory medium, a carbon protective film having a lower hydrogen content at an upper, surface portion thereof than at a lower, initial portion thereof is formed on either the recording medium or a sliding portion of the magnetic head.
摘要:
The present invention provides a carrier for replenishment including an associated particle in which single particles each having a core material and a resin layer covering the core material, are bound via the resin layer, the carrier being used in a developer for replenishment of a trickle development system, and the system including performing development while the developer for replenishment is replenished, upon development of a latent image on a latent image holding member using a development unit.
摘要:
In a radio communication system that simultaneously uses plural radio channels (STA1), a radio communication apparatus (11-15; 20-25) can quickly secure plural radio channels simultaneously used for radio communication while preventing collision with a radio signal transmitted by another radio communication apparatus so away from the radio communication apparatus that the radio communication apparatus cannot detect radio waves. A radio communication apparatus STA1 according to the present invention includes a receiving unit 10 which receives, when a first signal is transmitted via each of the plural radio channels (21-25), the first signal though at least one or more radio channels among the plural radio channels (11-15), and performs carrier sense for each of the plural radio channels used for the transmission of the first signal, a selecting unit 40 which selects a radio channel used for radio communication out of radio channels set in a standby state, and transmitting unit 20 which transmits a response signal for the first signal via the selected radio channel.
摘要:
The present invention provides a carrier for replenishment including an associated particle in which single particles each having a core material and a resin layer covering the core material, are bound via the resin layer, the carrier being used in a developer for replenishment of a trickle development system, and the system including performing development while the developer for replenishment is replenished, upon development of a latent image on a latent image holding member using a development unit.
摘要:
A wireless communication apparatus is disclosed. A transmitting device transmits a first aggregation frame in which first transmission data frames are aggregated. A measuring device measures a number value of retransmission of each of the first transmission data frames. A storage stores a limiting value of the number value of retransmission. A determination device determines whether the number value of retransmission of each of the first transmission data frames exceeds the limiting value. A transmission buffer buffers the first transmission data frames for which it is determined that the number value of retransmission does not exceed the limiting value, and discards the first transmission data frames for which it is determined that the number value of retransmission exceeds the limiting value, of the first transmission data frames. A retransmitting device retransmits the first aggregation frame in which the first transmission data frames buffered in the transmission buffer are aggregated.
摘要:
A wireless communication apparatus for performing wireless communication using a first channel having a first frequency bandwidth, and a second channel formed of both the first channel and a second communication channel, the second communication channel having a frequency bandwidth equal to the first frequency bandwidth. A first generation of a first declaration frame for declaring occupation of the first channel for a specified period, and a second generation of a second declaration frame for declaring occupation of the second communication channel for a specified period after the first declaration frame are generated and transmitted. Transmission timings are set so that the first and second declaration frames are transmitted at the highest priority of all the other frames.
摘要:
A wireless communication system includes first and second wireless terminals capable of performing transmission by at least one of a first transmission scheme and a second transmission scheme. The first wireless terminal performs transmission of a first frame to the second wireless terminal by using the second transmission scheme. The second wireless terminal communicates with the first wireless terminal to notify the first wireless terminal of information associated with a status of the reception of the first frame transmitted from the first wireless terminal by using the first transmission scheme.
摘要:
A physical frame is constructed, the physical frame including a medium access control super-frame payload which in turn includes a plurality of medium access control frames. With respect to the constructed physical frame, virtual carrier sense information is set in the plurality of medium access control frame so that a result of carrier sense is identical to another by virtual carrier sense based on the plurality of medium access control frames in the medium access control super-frame payload. The physical frame in which the virtual carrier sense information has been set is transmitted to a destined communication apparatus.
摘要:
A communication apparatus which is connected to networks including first network of first security level which is lowest security level and second network of second security level, and is wirelessly connected to terminal receiving terminal identifier and password which designates one of networks, from terminal, selecting one of first security level and second security level based on an authentication result of terminal, terminal identifier, and password, forwarding, when second security level is selected, data item which is transmitted from terminal and is encrypted using cryptographic algorithm and cryptographic key to second network, and forwarding, to terminal, data item which is transmitted from second network and addressed to terminal, and forwarding, when first security level is selected, data item transmitted from terminal to first network, and forwarding, to terminal, data item which is transmitted from first network and addressed to terminal.