Abstract: According to one embodiment, there is provided a memory card including a first surface, a second surface, and 1st to Nth terminal groups. The first surface includes first to Nth rows, where N is an integer of two or greater. The second surface faces the opposite side from the first surface. The 1st to Nth terminal groups are placed in the first to Nth rows. The 1st terminal group includes terminals to which differential clock signals are assigned, terminals to which single-ended signals are assigned, and a terminal to which a first power supply voltage is assigned. Kth terminal group, where K is an integer no smaller than two and no greater than N, includes terminals to which differential data signals are assigned.

Abstract: According to one embodiment, a semiconductor memory device includes a housing and terminals. The housing has a first end edge extending in a first direction and a second end edge opposite to the first end edge. The terminals include signal terminals and include first terminals, second terminals, and third terminals. The first terminals are arranged in the first direction at a position close to the first end edge. The second terminals are arranged in the first direction with intervals at a position closer to the first end edge than the second end edge. The first plurality of terminals are closer to the first end edge than the second plurality of terminals are. The third terminals are arranged in the first direction with intervals at a position closer to the second end edge than the first end edge.

Abstract: To provide a composition which is excellent in solubility of various organic substances, presents no adverse effects on the global environment and is excellent in stability. A composition comprising a monochlorotrifluoropropene and at least one stabilizer selected from the group consisting of a carboxylic acid, a carboxylic acid salt and a carboxylic acid ion, characterized in that the content of the stabilizer to the total content of the monochlorotrifluoropropene and the stabilizer is from 0.1 to 500 mass ppm.

Abstract: In a generator in which a stator is fixed to a housing which includes a first bracket having a bearing portion for pivotally supporting one end portion of a rotary shaft, and a second bracket covering a cooling fan that rotates with the rotary shaft, and a rotor surrounded by the stator is fixed to the rotary shaft, the stator is fixed to the first bracket, and the first bracket is integrally provided with a tubular portion which surrounds the stator for permitting cooling air sucked in by the cooling fan to flow between the tubular portion and an outer periphery of the stator, and the second bracket is connected to the tubular portion. Accordingly, cost is reduced by connecting first and second brackets together without using long through-bolts, and efficiency of cooling the stator is enhanced by making the cooling air flow along the outer periphery of the stator.

Abstract: In a rotor for a generator in which a rotor core is fixed to a rotary shaft rotatably supported by a housing, and field coils are wound on a bobbin installed in the rotor core, so as to be disposed on opposite sides of one plane passing a center axis of the rotary shaft, parts of the bobbin corresponding to axial outer ends of the rotor core are provided with separation protrusions by each of which a corresponding one of coil end portions at opposite ends of each of the field coils in an axial direction of the rotary shaft is divided into an inner portion and an outer portion in a radial direction of the rotary shaft, and on opposite sides of each of the separation protrusions in a peripheral direction of the rotary shaft, gaps are respectively formed between the inner portion and the outer portion.

Abstract: In a generator in which a stator is fixed to a housing which includes a first bracket having a bearing portion for pivotally supporting one end portion of a rotary shaft, and a second bracket covering a cooling fan that rotates with the rotary shaft, and a rotor surrounded by the stator is fixed to the rotary shaft, the stator is fixed to the first bracket, and the first bracket is integrally provided with a tubular portion which surrounds the stator permitting cooling air sucked in by the cooling fan to flow between the tubular portion and an outer periphery of the stator, and the second bracket is connected to the tubular portion. Accordingly, cost is reduced by connecting first and second brackets together without using long through-bolts, and efficiency of cooling the stator is enhanced by making the cooling air flow along the outer periphery of the stator.

Abstract: The wireless communication devices A and B determine the optimal diversity combining weight information that optimizes a diversity reception state at each antenna group A1, A2, . . . , AP through two-way training signal transfer between the wireless communication devices A and B. This optimal diversity combining weight information is set to each antenna of each antenna group A1, A2, . . . , AP. Wireless communication units A?, B? perform spacial mapping of signals from antenna group A1, A2, . . . , AP using MIMO technology. Communication area can be enlarged by hierarchization MIMO using the optimal diversity combining weight information.

Abstract: Wireless communication devices A and B perform wireless communication with the MIMO technology. The wireless communication devices A and B determine the optimal diversity combining information that optimizes a diversity reception state through a two-way training signal transfer. This determination can be made based on reception level information, baseband reception IQ information, correlation information between a diversity-combining received signal and a predetermined information sequence, or the like, which are obtained when the diversity combining information with respect to each antenna is sequentially changed. The optimal diversity combining information can be determined by receiving training frames or symbols (the number of antennas+1) times.

Abstract: The wireless communication devices A and B determine the optimal diversity combining weight information that optimizes a diversity reception state at each antenna group A1, A2, . . . , AP through two-way training signal transfer between the wireless communication devices A and B. This optimal diversity combining weight information is set to each antenna of each antenna group A1, A2, . . . , AP. Wireless communication units A?, B? perform spacial mapping of signals from antenna group A1, A2, . . . , AP using MIMO technology. Communication area can be enlarged by hierarchization MIMO using the optimal diversity combining weight information.

Abstract: Wireless communication devices A and B perform wireless communication with the MIMO technology. The wireless communication devices A and B determine the optimal diversity combining information that optimizes a diversity reception state through a two-way training signal transfer. This determination can be made based on reception level information, baseband reception IQ information, correlation information between a diversity-combining received signal and a predetermined information sequence, or the like, which are obtained when the diversity combining information with respect to each antenna is sequentially changed. The optimal diversity combining information can be determined by receiving training frames or symbols (the number of antennas+1) times.

Abstract: A packet transmitting apparatus comprises a wireless LAN base station and wireless terminals connected to the wireless LAN base station through the wireless LAN. From the wireless LAN base station to the respective wireless terminals, data packets are transmitted in a signal form of frame burst packets without an ACK and a series of header information on the respective data packets are transmitted as notification packets in a signal form of multicast packets. Data packets are individually transmitted from each wireless terminal to the wireless LAN base station by unicast using ACK. Each wireless terminal transmits to the wireless LAN base station a retransmission request to retransmit an unreceived data packet among the frame packets notified by corresponding one of the notification packets. The wireless LAN base station retransmits the packet corresponding to the retransmission request to the wireless terminal that transmits the retransmission request by unicast using ACK.

Abstract: A decision feed back equalizer provides two feedback routines for one symbol-preceding decided data. The signal space is separated into decidable areas and uncertainty areas. Within each of decidable area the distance between any point and the signal point is small. Within each uncertainty area the distance between any point and the signal point is large. If the symbol-preceding equalized signal is in a decidable area, the piece of decided data is fed back, as it is presumed to be correct. If the symbol-preceding equalized signal exists in an uncertainty area, the piece of decided data is not fed back, as it is presumed to be in error. Here the one piece data is selected from all the predicted symbol-preceding decided data so that the instant equalized data is now in the decidable area. This piece of decided data is now fed back.

Abstract: A packet transmitting method and a packet transmitting apparatus in a wireless LAN capable of improving a maximum number of simultaneous calls without degrading a call quality are provided. A plurality of wireless terminals 2 are connected to a wireless LAN base station 1 through the wireless LAN. Data packets are transmitted from the wireless LAN base station 1 to the respective wireless terminals 2 in a signal form of frame burst packets without an ACK. A series of header information on the respective data packets are transmitted as notification packets in a signal form of multicast packets from the wireless LAN base station 1 to the wireless terminals 2. Data packets are individually transmitted from each of the wireless terminals 2 to the wireless LAN base station 1 by unicast using ACK.

Abstract: A baseband digital IQ signal modulated by digital information and a spread spectrum IQ code sequence whose auto-correlation side lobe is equal to zero are frame-synthesized with each other to obtain a transmission baseband IQ signal. A modulated radio-frequency wave obtained by modulating a radio-frequency wave is transmitted over a radio transmission line. From a received baseband signal obtained by receiving the modulated radio-frequency wave is separated a received signal of the spread spectrum IQ code sequence and a received signal of the baseband digital-modulated IQ signal. A waveform equalized signal which is obtained by waveform-equalization of the received signal of the baseband digital modulated IQ signal is demodulated by the use of transmission parameters of the radio transmission line derived from a despread spectrum signal obtained by dispreading the spread spectrum IQ code sequence, to obtain a received data signal of the digital information transmitted from the transmitting side.

Abstract: A decision feed back equalizer is proposed, in which two feed back routins are provided for one symbol-preceding decided data. The signal space is separated into decidable areas and uncertainty areas in the present invention. Each of decidable areas is an area where a distance between any point in the decidable area and the signal point is small. Each uncertainty areas is an area where a distance between any point in the uncertainty area and the signal point is large. In a case where the one symbol-preceding equalized signal exists in a decidable area, since the one symbol-preceding decided data is presumed to be correct, the decided data is fed back.

Abstract: A method of two-way communication in a multiprocessor system in which two-way data communication is effected between a first processor and a second processor via a common memory. The first processor sequentially writes data A, B, C, . . . , F into the common memory, and forms a coupled queue. If the data A, B, C among the data A, B, C, . . . , F in the coupled queue are sequentially read by the second processor, the coupled queue is divided into a first partial queue constituted by the data D, E, F and a second partial queue constituted by the data A, B, C. The second processor is capable of sequentially reading the data D, E, F from the first partial queue, while the first processor is capable of sequentially reading the data A, B, C from the second partial queue. When the second processor sequentially reads the data A, B, C, . . . , F and the first processor then sequentially reads the data A, B, C, . . . , F in the above-described manner, it follows that the data A, B, C . . .

Abstract: There is disclosed a noise eliminating device for an angle-modulated wave, in which a carrier amplitude fluctuation of an angle-modulated input wave is detected in a frequency difference detector to obtain a frequency variation signal corresponding to a frequency variation arising at an amplitude limiter from the carrier amplitude fluctuation. Noise caused by the amplitude fluctuation is eliminated from the angle-modulated input wave by subtracting the frequency variation signal from an output signal of the amplitude limiter after or before the frequency difference detector.

Abstract: A storage star network for providing maximum propagation delay includes a plurality of terminal stations and a toll center for routing data packets among the stations. Each terminal station includes a memory and each data packet has an associated priority.

Abstract: Cleaning of gums, sludge and other adhering on a fuel injection valve in a fuel injection internal combustion engine can be done by driving of engine with a cleaning agent as a mixture of gasoline and an aromatic solvent. The mixture is adjusted the mixture rate thereof to satisfactorily combustion in an engine cylinder and dissolve gums, sludge and other adherings on the fuel injection valve. The cleaning agent is supplied to the engine cylinder through the fuel injection valve and during passing through the fuel injection valve it dissolves the adherings.