Abstract: Biocompatible nanoparticles 1 which entrap a bioactive substance and whose surface is positive-charge-modified are electrically adhered to a balloon portion 9 of a catheter main body 5 through a negatively charged resin layer 11, and thus a nanoparticle layer 12 is formed. After the catheter main body 5 is indwell in vivo, the nanoparticles 1 are gradually eluted from the nanoparticle layer 12 and are effectively delivered to cells.

Abstract: A process control system includes an I/O module configured to be connected to a field device which is installed in a plant in which an industrial process is controlled, the I/O module autonomously transmitting data received from the field device, and a higher-level device that comprises a memory which temporarily stores the data autonomously transmitted from the I/O module, the higher-level device reading the data stored in the memory at a predetermined period.

Abstract: A medical safety needle includes a needle body having a needlepoint, a covering body having a detent portion slidable on the needle body to catch the needlepoint so as to cover the needlepoint, and a resilient cantilever supporting the detent portion, a collar portion slidably fitting on the covering body, which is configured to get in contact with the cantilever to press the cantilever radially inwardly, and a housing being formed in a unitary body with the collar portion or having an end face on which the collar portion is capable of being seated, the housing being configured to carry the covering body from a first position to have the needlepoint exposed to a second position to have the needlepoint covered by the covering body.

Abstract: [Problem] The problem is to carry out the QoS control which tracks a change in a state of an outward line. [Means for solving the problem] A network repeater according to the present invention includes: a flow control means to carry out flow control for restricting inflow of a data flow which is received through an inward line; a bandwidth control means to carry out bandwidth control of controlling a bandwidth of a data flow which is received through the inward line and is sent through an outward line; and an outward line monitoring means to monitor a change in a state of the outward line. In the case that the monitored state of the outward line satisfies a specified condition which is determined in advance, either the flow control or the bandwidth control is carried out on a condition corresponding to the specified condition.

Abstract: This communication system is equipped with a plurality of transceiver devices each composed of a transmission device that transmits unit data and a reception device that receives unit data from the transmission device. The transmission devices are connected in series. Each of the transmission devices stores identification information for identifying the device itself. The transmission device accepts unit data from a front stage side. The transmission device generates identification information for identifying one of the transmission devices from information included in the accepted unit data, in accordance with a predetermined generation process. In a case that the generated identification information corresponds to the stored identification information, the transmission device transmits the accepted unit data to the reception device.

Abstract: A wireless network relay apparatus includes a Layer 2 switch and a line control device as well as wireless/wired line terminating devices performing band limitation associated with an AMR function. It measures traffic passing through each line terminating device in inflow/outflow path directions. Upon detecting a modulation scheme changed due to an AMR function in a wireless area, it may specify a line terminating device so as to read a desired modulation scheme from a transmission source modulation scheme conversion table of the line control device based on traffic. It may change a local modulation scheme with a desired modulation scheme when a difference therebetween is above a predetermined number of stages. By tracking a modulation scheme changed for a transmission destination, it is possible to appropriately change a modulation scheme for a transmission source, thus suppressing traffic without discarding necessary data.

Abstract: Disclosed is a transmission device that addresses the issue of alleviating the occurrence of delays in delivery, or the abandonment, of transmitted data in the transmission device when transmission capacity of the transmission device declines, as well as being easy to set up and maintain. The transmission device comprises a sorting means for assigning a first signal to either a first path or a second path on the basis of assignment information for assigning the first signal; a first transmitting means for transmitting the signal from among the first signal that is allocated to the first path upon the first path; and a second transmitting means for transmitting the signal from among the first signal that is allocated to the second path upon the second path.

Abstract: An external signal is received by the first wireless transmission device of one wireless transmission device group, and then is divided. One divided signal is transmitted to the first wireless transmission device of the other wireless transmission device group opposite to the one wireless transmission device group, and the other divided signal is transmitted to the second wireless transmission device of the one wireless transmission device group. In the same manner, in the second, third, . . . , wireless transmission devices of the one wireless transmission device group, an input signal is divided into two signals, and the divided signals are each transmitted to the opposing wireless transmission device of the other wireless transmission device group and to the adjacent wireless transmission device of the one wireless transmission device group.

Abstract: A transmitter is connected to a master device, and wirelessly transmits a timing packet, which is transmitted from the master device, to a receiver. The transmitter includes: an input unit for receiving an input of a timing packet from the master device; a delay compensation unit for obtaining a packet length of the timing packet and a modulation system used for radio transmission, calculating a device-specific delay value and a first propagation delay value based on the modulation system and the packet length, and calculating a delay compensation value based on the device-specific delay value and the first propagation delay value; a filter unit for adding the delay compensation value to a specific field of the timing packet; and an output unit for outputting the timing packet to the receiver.

Abstract: A data transfer device 210 is equipped with a plurality of communication ports 211a and 211b, a communication establishment processor 212, and a communication maintenance processor 213. The communication establishment processor 212 transmits and receives communication establishing information for establishing communication with an external device connected via the communication port to and from the external device. The communication maintenance processor 213 is configured to operate independently of the communication establishment processor 212 and, every time a predetermined transmission period elapses, transmits communication maintaining information for maintaining the establishment of communication with the external device, to the external device.

Abstract: A radio transmission apparatus serving as a Layer-2 switch (L2SW) or a router includes a MAC frame transmission device and a radio transmission device with an adaptive modulation function, which switches over a radio transmission capacity in response to fluctuations of quality of radio transmission lines. The radio transmission device determines a modulation method based on reception power of a reception signal from a radio counterpart station, so that a PAUSE frame multiplexing the modulation method is forwarded to the MAC frame transmission device. The MAC frame transmission device detects a current radio transmission capacity from the PAUSE frame, selects QoS setting suited to the radio transmission capacity from among a plurality of QoS settings, and performs a control operation based on QoS setting with respect to a LAN signal from a user network. The radio transmission device modulates and transmits the LAN signal to the radio counterpart station.

Abstract: A wireless transmission device includes a wireless reception unit which receives and demodulates a wireless frame in which a local area network (LAN) signal including a timing packet and an error detection code are multiplexed and converted into a high-frequency wireless output signal from a wireless transmission path, separates the LAN signal from the demodulated wireless frame, and calculates a wireless frame error rate by detecting a signal error of the wireless frame from the error detection code within the wireless frame, and a holdover switching unit which switches an operation mode from a timing reproduction mode in which a clock and a timing pulse are output based on a cycle and a phase reproduced from a timing packet included in the LAN signal to a holdover mode in which a clock and a timing pulse are output based on a cycle and a phase saved at a normal time when the wireless frame error rate calculated by the wireless reception unit is greater than a first threshold value.

Abstract: A link control function unit 506 of a device 500 notifies a counterpart device 600 of a line in which a link disconnection occurs among lines 508 to 510 and L500 terminated at line terminals 501 to 503 or a lower stage line terminal 504 of the self device 500 and the cause of the link disconnection is not a forcible closure of a line terminal of the self device. Further, the link control function unit 506 does not forcibly close the lower stage line terminal 504 of the self device 500 if a line in which a link disconnection occurs, notified from the counterpart device 600, is a line terminated at a lower stage line terminal 604 of the counterpart device 600.

Abstract: In a current station connected to a user network or a radio counterpart station, a radio transmission device with an adaptive modulation function, which switches over a radio transmission capacity in response to fluctuations of quality of radio transmission lines, and a MAC frame transmission device for determining and controlling communication quality are coupled together to function as a Layer-2 switch (L2SW) or a router. The radio transmission device determines a modulation method based on reception power of a reception signal transmitted from the radio counterpart station, wherein the modulation method is multiplexed with a PAUSE frame, which is then output to the MAC frame transmission device.

Abstract: A problem that a loss of signal occurs due to switching of a modulation scheme using an adaptive modulation scheme is solved. A radio transmission device (10a, 10b) having an automatic transmission power control function of controlling transmission power of its own station so as to maintain received power of a counter station at a preset constant value and a function of an adaptive modulation scheme for automatically switching over a modulation scheme depending on quality of a radio transmission path includes a modulation scheme determining circuit (14a, 14b) for switching over the modulation scheme by using the adaptive modulation scheme in consideration of a transmission power margin and the received power.

Abstract: [Problem] The problem is to carry out the QoS control which tracks a change in a state of an outward line. [Means for solving the problem] A network repeater according to the present invention includes: a flow control means to carry out flow control for restricting inflow of a data flow which is received through an inward line; a bandwidth control means to carry out bandwidth control of controlling a bandwidth of a data flow which is received through the inward line and is sent through an outward line; and an outward line monitoring means to monitor a change in a state of the outward line. In the case that the monitored state of the outward line satisfies a specified condition which is determined in advance, either the flow control or the bandwidth control is carried out on a condition corresponding to the specified condition.

Abstract: In a wireless communication network, a data communication device (e.g. a Layer 2 switch) includes a wireless monitoring device, a path cost control device, and a communication path control device. Due to an increase of path costs in wireless areas, the path control device recalculates path costs over a network so as to carry out switching to an appropriate data communication path, e.g. a LAN with blocking a wireless line. When a wireless band is recovered due to an AMR function, the wireless monitoring device sends a path cost change request to the path cost control device, which in turn reduces a path cost at a wireless line port. Additionally, the communication path control device recalculates path costs over a network so as to switch over data communication paths. Thus, it is possible to select an optimum data communication path with a low cost.

Abstract: A wireless network relay apparatus includes a Layer 2 switch and a line control device as well as wireless/wired line terminating devices performing band limitation associated with an AMR function. It measures traffic passing through each line terminating device in inflow/outflow path directions. Upon detecting a modulation scheme changed due to an AMR function in a wireless area, it may specify a line terminating device so as to read a desired modulation scheme from a transmission source modulation scheme conversion table of the line control device based on traffic. It may change a local modulation scheme with a desired modulation scheme when a difference therebetween is above a predetermined number of stages. By tracking a modulation scheme changed for a transmission destination, it is possible to appropriately change a modulation scheme for a transmission source, thus suppressing traffic without discarding necessary data.

Abstract: There is a problem that if a transmitter apparatus having an adaptive modulation function is to be configured to divide data for transmission, the structure of the transmitter apparatus will be complicated and the cost thereof will be raised. In order to solve this problem, a transmitter apparatus comprises: a dividing means for dividing input data into a plurality of pieces of data; a plurality of transmitting means for transmitting the pieces of data as divided to respective transmission paths; and a modulation scheme deciding means for deciding, from among modulation schemes associated with the conditions of the transmission paths, a modulation scheme, which is to be used by the transmission means, such that the difference in transmission speed between the pieces of data transmitted by the plurality of transmitting means is within a predetermined range.

Abstract: Disclosed is a transmission device that addresses the issue of alleviating the occurrence of delays in delivery, or the abandonment, of transmitted data in the transmission device when transmission capacity of the transmission device declines, as well as being easy to set up and maintain. The transmission device comprises a sorting means for assigning a first signal to either a first path or a second path on the basis of assignment information for assigning the first signal; a first transmitting means for transmitting the signal from among the first signal that is allocated to the first path upon the first path; and a second transmitting means for transmitting the signal from among the first signal that is allocated to the second path upon the second path.