Abstract: An object of the present invention is to provide a bundle optical fiber that can improve the coupling efficiency of light from a light source, enable space division multiplexing transmission, and can be manufactured by a simple process. A bundle optical fiber 301 according to the present invention is formed by bundling a plurality of single-core resin clad optical fibers 30 covering the outer periphery of a glass core 11 with a resin clad 15 having a refractive index smaller than that of the glass core 11. Only the core glass 11 is heated and drawn, and the resin clad 15 is applied to the outer periphery of the core glass 11 after drawing, to form a single-core resin clad optical fiber 30, and a plurality of single-core resin clad optical fibers 30 are bundled to form the bundle optical fiber 301.

Abstract: An object of the present invention is to provide an air conditioner unit that can fully demonstrate the sterilization effect on air with a large flow rate, even by a method of irradiating a filter and a coil with ultraviolet light. The air conditioner unit according to the present invention includes a filter 20 through which air passes, a plurality of optical fibers 16 arranged in such a manner that one ends thereof are close to a surface of the filter 20 and arranged at predetermined intervals, and a light source 30 that supplies ultraviolet light from the other end of each of the optical fibers 16. Since the intensity of the light is inversely proportional to the square of the distance from the light source, if the same sterilization effect is to be obtained, the shorter the irradiation distance, the smaller the irradiation intensity of the ultraviolet light can be.

Abstract: An object of the present invention is to provide an optical transmission system capable of reducing system costs and reducing waste of output power of a light source. The optical transmission system according to the present invention includes an ultraviolet light source part 11a having a light emitting diode (LED) that outputs ultraviolet light, an optical transmission line 26 that propagates the ultraviolet light through a plurality of cores of a multi-core optical fiber or a plurality of cores of a bundle optical fiber obtained by bundling a plurality of single-core optical fibers, and an optical system 11c that narrows down a spot shape of the ultraviolet light output from the LED to a size including all of the plurality of cores in an optical axis direction, and causes the ultraviolet light to enter the plurality of cores.

Abstract: The present disclosure is a noise cancellation system including: a microphone that converts a sound wave into an electrical signal; a transmission line that propagates the electrical signal from the microphone; a speaker that reproduces a sound wave from the electrical signal from the transmission line; a phase inversion circuit that is provided between the microphone and the speaker, and inverses the phase of the electrical signal; a gain adjustment circuit that is provided between the microphone and the speaker, and adjusts a gain for amplifying the electrical signal; and a delay adjustment circuit that is provided between the microphone and the speaker, and adjusts the amount of delay of the electrical signal.

Abstract: An object of the present invention is to provide an ultraviolet light irradiation sheet that can be decontaminated regardless of a shape of an object to be decontaminated. An ultraviolet light irradiation sheet (50) includes an optical fiber (20) which emits a part of propagating light from a side surface or an end surface; and a deformable sheet (10) which incorporates the optical fiber (20). The ultraviolet light irradiation sheet uniformly or partially irradiates ultraviolet light from a sheet surface. Therefore, by covering the object to be sterilized with the ultraviolet light irradiation sheet, a material having a complicated shape or an amorphous shape can be irradiated with the ultraviolet light without making a shade. Since the ultraviolet light irradiation sheet does not diffuse bacteria and viruses by wind, the sterilization of the object to be sterilized can be performed without forming a closed space.

Abstract: An object of the present disclosure is to prevent a decrease in a window size, thereby reducing a quality degradation time due to handover processing. The present disclosure is a communication system in which a communication terminal communicates with an arbitrary communication device according to an allocated window size, in which the communication system saves a window size before handover or a window size determined based on the window size when the communication terminal performs the handover, and determines window size after the handover based on the saved window size.

Abstract: The present invention has an object to provide an uplink band allocation apparatus and an uplink band allocation method that are capable of setting an uplink band of a PON in accordance with an application. The uplink band allocation apparatus and method according to the present invention collect not only the amount of the data accumulated in an ONU but also the information of the application (application information) used on a terminal apparatus. Then, the uplink band allocation apparatus and method according to the present invention reflect, on a DBA conducted by the OLT, information of a band and a delay (band delay information) that have been calculated by an application information acquisition server from the application information and that are demanded by the application.

Abstract: An object of the present invention is to provide a photocatalytic sheet configured to perform disinfection independent of the state of external light. A photocatalytic sheet 50 according to the present invention includes a sheet 10 having a photocatalytic layer 17 on one surface, and an optical fiber 20 embedded in the sheet 10 and configured to supply ultraviolet light UV from inside of the sheet 10 to the photocatalytic layer 17. In the photocatalytic sheet, ultraviolet light is supplied from the optical fiber disposed in the sheet to the photocatalytic layer coated on the surface of the sheet (ultraviolet light is supplied from the back of the photocatalytic layer). This configuration allows for disinfection independent of the state of external light.

Abstract: An object of the present invention is to provide a banknote disinfection system configured to disinfect banknotes in a general-purpose banknote handling device without making a significant change in the structure of the general-purpose device. The banknote disinfection system 300 includes a conveyance mechanism configured to convey a banknote 50 using a plurality of rollers 12 and an optical fiber 20 configured to emit ultraviolet light to a surface of the banknote 50 conveyed by the conveyance mechanism. An optical fiber is thin, has many length options, and is flexible. With these features of the optical fiber, the optical fiber can be routed inside of, for example, an automatic teller machine to irradiate the banknotes moving inside the device with ultraviolet light.

Abstract: An object of the present invention is to provide an ultraviolet light irradiation system that is easy to operate and can avoid degradation of a material due to ultraviolet light. An ultraviolet light irradiation system according to the present invention includes: one ultraviolet light source unit 11 that generates ultraviolet light; an irradiation unit 13 that irradiates a desired portion (irradiation portion ste) with the ultraviolet light in a limited manner; an optical fiber 14 that propagates the ultraviolet light from the ultraviolet light source unit 11 to the irradiation unit 13; a sensing unit 16 that monitors a state of the irradiation portion ste and outputs the state as monitoring information; and an irradiation control unit 15 that controls output of the ultraviolet light from the ultraviolet light source unit 11 on the basis of the monitoring information.

Abstract: An object is to provide a communication system in which there are no restrictions on a communicable area and it is not necessary to install communication software on a wireless device. A communication system according to the present invention is configured so that the functions of a wireless access point are separated into a front-end unit on a wireless terminal side and a back-end side on the Internet side, radio signal processing functions supporting a wireless scheme of the wireless terminal are deployed only on the back end, and only relatively simple processing functions such as E/O conversion are deployed on the front end near the wireless terminal 311.

Abstract: An object of the present disclosure is to enable each ONU to generate a plurality of logical paths corresponding to the number of terminal devices connected to the ONU without setting a plurality of MAC addresses in each ONU.

Abstract: An object of the present invention is to provide an air conditioner unit that allows for greater flexibility in designing the shape of the unit and is capable of reducing the cost of lamp replacement. An air conditioner unit according to the present invention includes an optical fiber group 17 formed by bundling a plurality of optical fibers 16 emitting a part of propagating light from side faces thereof; an air duct 10 that incorporates the optical fiber group 17 in a space 13 through which air passes; and a light source 30 that supplies ultraviolet light to each of the optical fibers 16. Since the intensity of the light is inversely proportional to the square of the distance from the light source, if the same sterilization effect is to be obtained, the irradiation intensity of the ultraviolet light can be reduced when the irradiation distance is shorter.

Abstract: An object of the present disclosure is to provide a communication path switching method for improving a throughput of TCP communication at the time of switching a communication path between a first communication path that is at least one of a low latency or high speed and a second communication path that is at least one of a high latency or low speed.

Abstract: An object of the present disclosure is to enable an ONU to acquire ID information of terminal devices even when a network device is connected between the ONU and the terminal devices, and to thereby enable generation of a logical path between the ONU and the OLT. The present disclosure relates to an optical communication network system configured to connect a terminal device and a passive optical network (PON) system via a network device. The PON system includes an optical line terminal and an optical network unit connected using an optical transmission line. The network device is configured to acquire ID information of the terminal device, and notify the optical network unit of the acquired ID information. The optical network unit is configured to acquire ID information of the terminal device from the network device, and generate a logical path to the optical line terminal on the optical transmission line using the acquired ID information.

Abstract: An object of the present disclosure is to make multipath technology applicable to UDP. The present disclosure is a communication system in which a plurality of communication devices are connected via a plurality of networks, wherein one of the plurality of communication devices reads application data stored in a UDP payload, and stores information on a multipath option as a part of the application data, and the other one of the plurality of communication devices reads application data stored in a UDP payload, acquires information on a multipath option from the application data, and executes communication via the plurality of networks on the basis of the acquired information on the multipath option.

Abstract: An object of the present invention is to provide an ultraviolet light irradiation system and an ultraviolet light irradiation method having a P-MP configuration capable of obtaining a predetermined effect such as sterilization. An ultraviolet light irradiation system 301 according to the present invention includes an ultraviolet light source unit 11 that generates ultraviolet light, N (N is a natural number) irradiation units 13 that irradiate a desired site (irradiation target region ste) with the ultraviolet light, an optical switch 12 that switches the ultraviolet light to each of paths 14 to the irradiation units 13, and a switching control unit 15 that controls a switching operation of the optical switch 12 so as to give an opportunity to be supplied with an integrated light amount per unit time equal for each of the paths 14 on the basis of a transmission loss of the ultraviolet light for each of the paths 14 and an irradiation area where the irradiation unit 13 irradiates the ultraviolet light.

Abstract: An object of the present invention is to provide an ultraviolet light irradiation system and an ultraviolet light irradiation method, each of which is capable of reducing deterioration over time of transmission loss characteristics of an optical fiber due to ultraviolet rays and preventing a decrease in ultraviolet ray irradiation power.

Abstract: A communication method performed by a communication system including an authentication device and a subscriber line system includes: determining by the authentication device, in response to a request for communicative connection from a user terminal that establishes a communicative connection via the subscriber line system, whether the user terminal is allowed to establish the communicative connection; and controlling, by the subscriber line system, the communicative connection established by the user terminal, by dynamically allocating a bandwidth in accordance with a request from the user terminal based on a result of the determining.

Abstract: An object of the present invention is to provide an ultraviolet light irradiation system and an ultraviolet light irradiation method which can perceive a state of a region where ultraviolet light is irradiated to output/block the ultraviolet light. An ultraviolet light irradiation system 301 according to the present invention includes an ultraviolet light source unit 11 that produces ultraviolet light, an N (N is a natural number) irradiation unit 13 that irradiates an irradiation target region Ar with the ultraviolet light, a sensor unit 31 that detects whether or not an object that should avoid exposure is present in the irradiation target region Ar, and a blocking unit 30 that stops, in a case where the object that should avoid exposure is present in the irradiation target region Ar, irradiation of the ultraviolet light from the irradiation unit 13 to the irradiation target region Ar.