Abstract: An optical receiver includes a transimpedance amplifier that converts a current signal corresponding to an optical signal into a voltage signal. The transimpedance amplifier includes an input terminal receiving the current signal, an output terminal outputting the voltage signal, an inverting circuit including a pull-up device that pull-up drives the voltage signal of the output terminal according to the current signal, and a pull-down device that pull-down drives the voltage signal of the output terminal according to the current signal, a feedback resistor electrically connected between the input and output terminals, a first resistor electrically connected between the input terminal and the pull-up device, and a second resistor electrically connected between the input terminal and the pull-down device.

Abstract: An optical transceiver includes an optical transmitter and an optical receiver. The optical transmitter includes a laser diode configured to convert a current signal into an optical signal; a main driver comprising first and second output terminals that have a differential structure, the main driver configured to drive the first and second output terminals in response to differential input signals and to provide the current signal to the laser diode through the first output terminal; and an impedance balancer configured to match impedances of the first and second output terminals by adjusting the impedance of the second output terminal according to signal states of the first and second output terminals.

Abstract: An optical transceiver includes an optical transmitter and an optical receiver. The optical transmitter includes a laser diode configured to convert a current signal into an optical signal; a main driver comprising first and second output terminals that have a differential structure, the main driver configured to drive the first and second output terminals in response to differential input signals and to provide the current signal to the laser diode through the first output terminal; and an impedance balancer configured to match impedances of the first and second output terminals by adjusting the impedance of the second output terminal according to signal states of the first and second output terminals.

Abstract: Disclosed is a ceria electrolyte for a solid oxide fuel cell, which is a ceria (CeO2) electrolyte configured such that either gadolinium (Gd) or samarium (Sm) is co-doped with ytterbium (Yb) and bismuth (Bi), wherein Bi is doped in an amount of 0.5 to 5 mol %, thus exhibiting low-temperature sintering properties.

Abstract: An optical receiver includes a transimpedance amplifier that converts a current signal corresponding to an optical signal into a voltage signal. The transimpedance amplifier includes an input terminal receiving the current signal, an output terminal outputting the voltage signal, an inverting circuit including a pull-up device that pull-up drives the voltage signal of the output terminal according to the current signal, and a pull-down device that pull-down drives the voltage signal of the output terminal according to the current signal, a feedback resistor electrically connected between the input and output terminals, a first resistor electrically connected between the input terminal and the pull-up device, and a second resistor electrically connected between the input terminal and the pull-down device.

Abstract: An optical transceiver includes an optical transmitter and an optical receiver. The optical transmitter includes a laser diode configured to convert a current signal into an optical signal; a main driver comprising first and second output terminals that have a differential structure, the main driver configured to drive the first and second output terminals in response to differential input signals and to provide the current signal to the laser diode through the first output terminal; and an impedance balancer configured to match impedances of the first and second output terminals by adjusting the impedance of the second output terminal according to signal states of the first and second output terminals.

Abstract: An optical transceiver includes an optical transmitter and an optical receiver. The optical transmitter includes a laser diode configured to convert a current signal into an optical signal; a main driver comprising first and second output terminals that have a differential structure, the main driver configured to drive the first and second output terminals in response to differential input signals and to provide the current signal to the laser diode through the first output terminal; and an impedance balancer configured to match impedances of the first and second output terminals by adjusting the impedance of the second output terminal according to signal states of the first and second output terminals.

Abstract: An optical transceiver includes an optical transmitter and an optical receiver. The optical transmitter includes a laser diode configured to convert a current signal into an optical signal; a main driver comprising first and second output terminals that have a differential structure, the main driver configured to drive the first and second output terminals in response to differential input signals and to provide the current signal to the laser diode through the first output terminal; and an impedance balancer configured to match impedances of the first and second output terminals by adjusting the impedance of the second output terminal according to signal states of the first and second output terminals.

Abstract: Disclosed is a ceria electrolyte for a solid oxide fuel cell, which is a ceria (CeO2) electrolyte configured such that either gadolinium (Gd) or samarium (Sm) is co-doped with ytterbium (Yb) and bismuth (Bi), wherein Bi is doped in an amount of 0.5 to 5 mol %, thus exhibiting low-temperature sintering properties.

Abstract: An optical transceiver includes an optical transmitter and an optical receiver. The optical transmitter includes a laser diode configured to convert a current signal into an optical signal; a main driver comprising first and second output terminals that have a differential structure, the main driver configured to drive the first and second output terminals in response to differential input signals and to provide the current signal to the laser diode through the first output terminal; and an impedance balancer configured to match impedances of the first and second output terminals by adjusting the impedance of the second output terminal according to signal states of the first and second output terminals.

Abstract: Disclosed is a ceria electrolyte for a solid oxide fuel cell, which is a ceria (CeO2) electrolyte configured such that either gadolinium (Gd) or samarium (Sm) is co-doped with ytterbium (Yb) and bismuth (Bi), wherein Bi is doped in an amount of 0.5 to 5 mol %, thus exhibiting low-temperature sintering properties.

Abstract: Disclosed are a highly ionic conductive zirconia electrolyte and a high-efficiency solid oxide fuel cell using the same. The highly ionic conductive zirconia electrolyte is configured such that a scandia (Sc2O3) stabilized zirconia (ZrO2) electrolyte is simultaneously doped with cerium oxide (CeO2) and at least one oxide of gadolinium oxide (Gd2O3), samarium oxide (Sm2O3), and ytterbium oxide (Yb2O3) so that an ionic conductivity drop rate is mitigated.

Abstract: Disclosed is a ceria electrolyte for a solid oxide fuel cell, which is a ceria (CeO2) electrolyte configured such that either gadolinium (Gd) or samarium (Sm) is co-doped with ytterbium (Yb) and bismuth (Bi), wherein Bi is doped in an amount of 0.5 to 5 mol %, thus exhibiting low-temperature sintering properties.

Abstract: The present invention relates to a composition for preventing skin aging containing aloesin or a derivative thereof. The aloesin or the derivative thereof, according to the present invention reduces cytotoxicity and inhibits a MMP-1 level and increases PIP levels and procollagen type 1, in normal human dermal fibroblasts (NHDF) after ultraviolet irradiation, and thus is particularly effective for preventing or treating skin photoaging induced by ultraviolet irradiation.

Abstract: Disclosed are a highly ionic conductive zirconia electrolyte and a high-efficiency solid oxide fuel cell using the same. The highly ionic conductive zirconia electrolyte is configured such that a scandia (Sc2O3) stabilized zirconia (ZrO2) electrolyte is simultaneously doped with cerium oxide (CeO2) and at least one oxide of gadolinium oxide (Gd2O3), samarium oxide (Sm2O3), and ytterbium oxide (Sm2O3) so that an ionic conductivity drop rate is mitigated.

Abstract: The present invention discloses a method for displaying a high resolution picture in a mobile communication terminal having a low resolution display means, the mobile communication terminal and a system for converting a picture file format therefor.

Abstract: The present invention relates to a flavonoid compound having an antiviral activity, more particularly to a flavonoid compound obtained by extracting Houttuynia cordata with methanol and separating/purifying with chromatography, a method for efficient extraction and purification of the same and an antiviral composition comprising the compound as an active ingredient.

Abstract: The present invention relates to a flavonoid compound having an antiviral activity, more particularly to a flavonoid compound obtained by extracting Houttuynia cordata with methanol and separating/purifying with chromatography, a method for efficient extraction and purification of the same and an antiviral composition comprising the compound as an active ingredient.

Abstract: The present invention discloses a method for displaying a high resolution picture in a mobile communication terminal having a low resolution display means, the mobile communication terminal and a system for converting a picture file format therefor.

Abstract: An apparatus provides a visualized navigation interface by real-time volume rendering volume data. In addition, the apparatus visualizes internal information of a large-scale 3-dimensional volume data which are widely used in various fields such as medical images, computer graphics, virtual reality and scientific data visualization. Thereafter, the interaction with a user is possible through the real-time volume rendering and visual navigation interface for the large amount of volume data that the conventional volume rendering apparatus cannot process. Further, the present invention can provide excellent images providing surface and internal information of an object through the real-time interaction with the user.