Abstract: An apparatus for diagnosing a disease and a method for diagnosing a disease, in which: a plurality of voice signals are received to generate a first image signal and a second image signal which are image signals for each voice signal; a plurality of disease probability information for a target disease causing a voice change are extracted by using an artificial intelligence model determined according to the type of each voice signal and a generation method used to generate each image signal for the first image signal and the second image signal for each voice signal; and it is determined whether the target disease is negative or positive on the basis of the plurality of disease probability information.

Abstract: A method of controlling the opening of a door of a laundry treatment machine is provided. According to the method, when a door opening signal is detected during an operation of a laundry treatment machine, the temperature and the water level in a tub are reduced, and then the door of the laundry treatment machine is opened. Thus, it is possible to prevent a user from being burned by hot air or water in the tub and thus to improve the safety of a laundry treatment machine. Also, it is possible to enhance the convenience of a laundry treatment machine by allowing a user to open the door of the laundry treatment machine during an operation of the laundry treatment machine and to additionally put laundry in the laundry treatment machine. In addition, according to the method, wash water is discharged from a tub according to the temperature and the water level in the tub, and then cold water is supplied into the tub.

Abstract: A method of controlling the opening of a door of a laundry treatment machine is provided. According to the method, when a door opening signal is detected during an operation of a laundry treatment machine, the temperature and the water level in a tub are reduced, and then the door of the laundry treatment machine is opened. Thus, it is possible to prevent a user from being burned by hot air or water in the tub and thus to improve the safety of a laundry treatment machine. Also, it is possible to enhance the convenience of a laundry treatment machine by allowing a user to open the door of the laundry treatment machine during an operation of the laundry treatment machine and to additionally put laundry in the laundry treatment machine. In addition, according to the method, wash water is discharged from a tub according to the temperature and the water level in the tub, and then cold water is supplied into the tub.

Abstract: Disclosed is a bi-direcional wavelength-division multiplexing optical communication system including a first optical transmitter/receiver unit for transmitting a forward optical signal composed of a plurality of channels respectively allocated with wavelengths having a desired wavelength space while receiving a reverse optical signal composed of a plurality of channels respectively allocated with wavelengths each interleaved between associated ones of the wavelengths of the forward optical signal, a second optical transmitter/receiver unit for transmitting the reverse optical signal while receiving the forward optical signal, an optical fiber coupled between the first and second optical transmitter/receiver units, the optical fiber serving as a transmission medium for the forward and reverse optical signals, and an optical amplifier device arranged on the optical fiber and adapted to interleave the channels of the forward and reverse optical signals, bi-directionally received via the optical fiber, in accorda

Abstract: An erbium-doped fiber amplifier and a wavelength division multiplexing optical transmission system equipped with the same are disclosed. The wavelength division multiplexing optical transmission system includes a transmission stage having a first C/L fiber amplifier for amplifying combined C and L-band optical signals, an optical repeater having at least one second C/L fiber amplifier for amplifying the optical signals transmitted from a single mode fiber of a predetermined length, and a dispersion compensating fiber of a predetermined length for compensating dispersions of the amplified optical signals. The system also includes a reception stage having a third C/L fiber amplifier for amplifying the optical signals transmitted from a single mode fiber of a predetermined length, and a receiver for separating the amplified optical signals from the third C/L fiber amplifier into C-band optical signals and L-band optical signals band by band and de-multiplexing the separated amplified optical signals.

Abstract: Disclosed is a dispersion-compensated optical-fiber amplifier including a circulator for outputting an optical signal received at a first terminal to a second terminal, while outputting an optical signal received at the second terminal to a third terminal; a first amplifier for amplifying the optical signal from the second terminal and an optical signal reapplied thereto; a dispersion-compensating fiber for compensating for a dispersion occurring in the optical signal received from the first amplifier and an optical signal reapplied thereto; a second amplifier for amplifying the optical signal from the dispersion-compensating fiber and an optical signal reapplied thereto; a splitter installed on the dispersion-compensating fiber and adapted to output to the dispersion-compensating fiber, an optical signal applied thereto and an optical signal reapplied thereto, while outputting a pumping light applied to one end thereof and adapted to pump both the first and second amplifiers to the other end thereof without

Abstract: An erbium-doped fiber amplifier and a wavelength division multiplexing optical transmission system equipped with the same are disclosed. The wavelength division multiplexing optical transmission system includes a transmission stage having a first C/L fiber amplifier for amplifying combined C and L-band optical signals, an optical repeater having at least one second C/L fiber amplifier for amplifying the optical signals transmitted from a single mode fiber of a predetermined length, and a dispersion compensating fiber of a predetermined length for compensating dispersions of the amplified optical signals. The system also includes a reception stage having a third C/L fiber amplifier for amplifying the optical signals transmitted from a single mode fiber of a predetermined length, and a receiver for separating the amplified optical signals from the third C/L fiber amplifier into C-band optical signals and L-band optical signals band by band and de-multiplexing the separated amplified optical signals.

Abstract: A bi-directional optical add/drop multiplexer is provided comprising a first interleaver for outputting to a second end a forward optical signal that has been inputted through a first end connected to the optical fiber, and a backward optical signal to a second end that has been inputted through a third end; a second interleaver for interleaving the forward optical signal inputted through a first end and the backward optical signal inputted through a second end by wavelengths, and outputting the interleaved signal through a third end; an optical add/drop multiplexing unit for adding a selected channel to the interleaved optical signal or dropping a selected channel from the interleaved optical signal; a third interleaver for outputting a backward optical signal among the channel-modified optical signals inputted through a second end to the third end of the first interleaver through a first end, and a forward optical signal through a third end; and a fourth interleaver for outputting a backward optical signal

Abstract: Disclosed is a dispersion-compensated optical-fiber amplifier including a circulator for outputting an optical signal received at a first terminal connected to an optical fiber to a second terminal, while outputting an optical signal received at the second terminal to a third terminal connected to the optical fiber; a first amplifier for amplifying the optical signal from the second terminal and an optical signal reapplied thereto by utilizing an induced emission of pumped-excited ions; a dispersion-compensating fiber for compensating for a dispersion occurring in the optical signal received from the first amplifier and an optical signal reapplied thereto; a second amplifier for amplifying the optical signal from the dispersion-compensating fiber and an optical signal reapplied thereto by utilizing an induced emission of pumped-excited ions; a splitter installed on the dispersion-compensating fiber and adapted to output to the dispersion-compensating fiber, an optical signal applied thereto and an optical sig

Abstract: Disclosed is a bi-direcional wavelength-division multiplexing optical communication system including a first optical transmitter/receiver unit for transmitting a forward optical signal composed of a plurality of channels respectively allocated with wavelengths having a desired wavelength space while receiving a reverse optical signal composed of a plurality of channels respectively allocated with wavelengths each interleaved between associated ones of the wavelengths of the forward optical signal, a second optical transmitter/receiver unit for transmitting the reverse optical signal while receiving the forward optical signal, an optical fiber coupled between the first and second optical transmitter/receiver units, the optical fiber serving as a transmission medium for the forward and reverse optical signals, and an optical amplifier device arranged on the optical fiber and adapted to interleave the channels of the forward and reverse optical signals, bi-directionally received via the optical fiber, in accorda

Abstract: A WDM optical transmission system with a bi-directional WDM-ADM is disclosed. The system includes first and second transceivers for multiplexing a multi-channel optical signal before transmission and for de-multiplexing a received multi-channel optical signal; and, a bi-directional WDM-ADM for interleaving the channels of an optical signal received from the first transceiver and the channels of an optical signal received from a second transceiver, for adding/dropping the interleaved optical signals according to channels, for de-interleaving the added/dropped optical signals into a first optical signal and a second optical signal, and for providing the first and the second optical signals to the first and second transceivers, respectively.