Abstract: The present invention discloses a back contact solar cell. The back contact solar cell includes a semiconductor substrate having a front surface and a rear surface; a first conductive type semiconductor region having a first conductive type and a second conductive type semiconductor region having a second conductive type at an interval on the rear surface of the semiconductor substrate. Furthermore, the rear surface of the semiconductor substrate has a texturing structure at the interval between the first conductive type semiconductor region and the second conductive type semiconductor region.

Abstract: The present invention discloses a back contact solar cell. The back contact solar cell includes a semiconductor substrate having a front surface and a rear surface; and a first conductive type semiconductor region having a first conductive type and a second conductive type semiconductor region having a second conductive type, the first conductive type semiconductor region and the second conductive type semiconductor region being disposed with an interval on the rear surface of the semiconductor substrate. In addition, the rear surface of the semiconductor substrate has a texturing structure at the interval between the first conductive type semiconductor region and the second conductive type semiconductor region.

Abstract: The technical features of the present invention are for a method for quickly and easily constructing a building made of soil such as a house or a retaining wall by means of a process of installing a temporary mold in a frame member made of a mesh, compacting pugging clay into the temporary mold in a bottom-up method by a mechanical extruder, and immediately removing the temporary mold and drying the pugging clay.

Abstract: The technical features of the present invention are for a method for quickly and easily constructing a building made of soil such as a house or a retaining wall by means of a process of installing a temporary mold in a frame member made of a mesh, compacting pugging clay into the temporary mold in a bottom-up method by a mechanical extruder, and immediately removing the temporary mold and drying the pugging clay.

Abstract: Provided are messenger notification system and method using a synchronization server. The system includes a messenger service system controlling transmission of instant messages of messenger users and monitoring and transmitting messenger users' status change information; at least one external service system monitoring whether a predetermined event occurs and creating a notification message indicating the occurrence of the event when the event occurs; and a synchronization server receiving the messenger users' status change information from the messenger service system, storing the received status change information in an online user database, determining whether a user to receive the notification message is online when receiving the notification message from the at least one external service system, transmitting the notification message to the messenger service system to send the notification message to the online user when the user is online.

Abstract: One aspect of the present invention relates to a drug delivery system comprising a layered structure where a drug layer and a biodegradable polymer layer for controlling the release of drugs are alternately laminated. The drug delivery system can easily control an in-vivo drug release rate and a release amount.

Abstract: A retinal prosthesis system can comprise: a flexible substrate; a nanowire light detector which is placed on the substrate, and comprises one or more nanowires of which the resistance changes according to the applied light; one or more micro-electrodes which are placed on the substrate, are electrically connected to the nanowire light detector, and come in contact with retinal cells; and an electric power supply source for applying electric power to the nanowire light detector and the micro-electrodes. The retinal prosthesis system can be implemented into a very thin and flexible substrate type high resolution retinal system by manufacturing a nanowire light detector on a substrate in which micro-electrodes are implemented.

Abstract: The present invention relates to a heat-shrinkable polyester film, which has a heat-shrinkage of 20% or more in both the longitudinal and transverse directions when treated with 80° C. water for 30 seconds and a bidirectional balance parameter in the range of 0.25 to 2.5 and exhibits an excellent properties in die-cutting and removing from a container such as a glass bottle for recycling by washing with hot water.

Abstract: The present invention discloses a back contact solar cell comprising: a first conductive type semiconductor substrate having a front surface and a rear surface of a texturing structure; an oxide layer formed on the front surface of the substrate; at least one first conductive type semiconductor region and second conductive type semiconductor region alternatively formed at predetermined intervals on the rear surface of the substrate; an oxide layer formed on the remaining rear surface of the substrate except for the first conductive type semiconductor region and the second conductive type semiconductor region; and electrodes formed on each of the first conductive type semiconductor region and the second conductive type semiconductor region.

Abstract: The present invention relates to a heat-shrinkable polyester film, which has a heat-shrinkage of 20% or more in both the longitudinal and transverse directions when treated with 80° C. water for 30 seconds and a bidirectional balance parameter in the range of 0.25 to 2.5 and exhibits an excellent properties in die-cutting and removing from a container such as a glass bottle for recycling by washing with hot water.

Abstract: A back contact solar cell comprises a first dopant diffusion part and a second dopant diffusion part formed on a rear surface of an n-type semiconductor wafer with a predetermined distance formed therebetween by a diffusion prevention part for ensuring no contact with each other and suppressing the diffusion of dopant; and an electrode configured of an anode and a cathode each connected to the first dopant diffusion part and the second dopant diffusion part. According to the present invention, the back contact solar cell is capable of preventing light loss and improving its efficiency by forming an electrode to be positioned on a rear surface of a semiconductor wafer through a simple process and by simultaneously implementing an anode electrode and a cathode electrode on the semiconductor wafer without having a grid electrode restricting incidence of sunlight.

Abstract: Disclosed are a hetero-junction silicon solar cell and a fabrication method thereof. The hetero-junction silicon solar cell according to the present invention forms a pn junction of a crystalline silicon substrate and a passivation layer doped with impurities so as to minimize a recombination of electrons and holes, making it possible to maximize efficiency of the hetero-junction silicon solar cell. The present invention provides a hetero-junction silicon solar cell comprising a crystalline silicon substrate and a passivation layer that is formed on the crystalline silicon substrate and is doped with impurities.

Abstract: The present invention relates to use of ginsenoside Rg3, Rg5 or Rk1, or extract of ginseng, red ginseng or processed ginseng comprising the ginsenosides; a composition for preventing or treating angiostenosis and restenosis comprising the ginsenosides or extracts; a method for preventing or treating angiostenosis and restenosis by administrating the ginsenosides or extracts comprising the ginsenosides; and a preparation method of agents for preventing or treating angiostenosis and restenosis. The present composition can effectively prevent or treat angiostenosis and restenosis.

Abstract: Provided are messenger notification system and method using a synchronization server. The system includes a messenger service system controlling transmission of instant messages of messenger users and monitoring and transmitting messenger users' status change information; at least one external service system monitoring whether a predetermined event occurs and creating a notification message indicating the occurrence of the event when the event occurs; and a synchronization server receiving the messenger users' status change information from the messenger service system, storing the received status change information in an online user database, determining whether a user to receive the notification message is online when receiving the notification message from the at least one external service system, transmitting the notification message to the messenger service system to send the notification message to the online user when the user is online.

Abstract: The present invention relates to a ginseng composition equally comprising more than a certain amount of 10 kinds of ginsenoside in ginseng having particular pharmacological effect; or a composition for the prevention or improvement of lowering of concentration and memory capability comprising ginsenoside Rg3, Rg5 or RkI; a use thereof; a method for the prevention or improvement of lowering of concentration and memory capability by administrating the above composition; and a method for preparing agents for the prevention or improvement of lowering of concentration and memory capability by extracting ginseng etc. or mixing 10 kinds of ginsenoside in ginseng.

Abstract: An apparatus for operating an auto-shutter in an air-conditioner is provided, which includes an external casing in which a louver frame having an exit is installed in the inner portion of the upper end thereof, an auto-shutter movable between an opened position opening the exit and a closed position closing the exit, and a shutter driver driving the auto-shutter.

Abstract: Disclosed herein is an air conditioner having independent cooling and purifying paths. The air conditioner comprises a body casing formed by assembling a front panel with a rear panel, the front panel having a cooled air discharge opening and one or more suction openings to introduce indoor air into the body casing, a first fan arranged in the body casing to suction air via the suction openings, and a heat exchanger located above the first fan to perform heat exchange of the suctioned air. A cooler housing is arranged in the body casing to receive the first fan therein. Also, an air purifier is mounted in the body casing.

Abstract: The present invention relates to a harmonic-noise speech coder and coding algorithm of the mixed signal of voiced/unvoiced sound using harmonic model. The harmonic-noise speech coder comprises a noise spectral estimating means for coding the noise component by predicting the spectral by LPC analysis method after separating the noise, which is unvoiced sound component from the inputted LPC residual signal using cepstrum. And more improved speech quality can be obtained by analyzing noise effectively using the noise spectral model predicted through cepstrum-LPC analysis method of the mixed signal of voiced/unvoiced sound to the existing harmonic model and then coding the signal.

Abstract: A time-separated speech coder that codes a transitional signal of voiced/unvoiced sound through harmonic speech coding, the coder including a transitional excitation signal analyzer/synthesizer for coding the transitional signal by extracting the harmonic model parameters of both transitional analyzers after detecting a transitional point and generating sinusoidal waveforms according to a variable transitional point separating both transitional analyzers. By the transitional point at which energy varies abruptly and the time-separated coding based on the transitional point, more improved speech quality than in the general harmonic speech coder can be obtained using the time-separated speech coder by increasing the representation capability of the transitional signal with large energy variation, after adapting it to the variable transitional point.

Abstract: A fast search method for LSP (Linear Spectrum Pair) quantization is provided. The fast search method in accordance with an embodiment of the present invention includes the following steps. A first step is obtaining a target vector and a code vector. The target vector and the code vector are converted for ordering property. A second step is generating a code book having the ordering property for sub-matrices by utilizing the target vector and the code vector. A third step is selecting a particular line for determining a search scope in the code books and sorting the code book in descending order with respect to component values of the particular line. A fourth step is determining the search scope by utilizing the ordering property of the target vector and the sorted code vectors. The fifth step is obtaining an error standard by utilizing the target vector and the code vector, and obtaining an optimal code vector by utilizing the error standard within the determined search scope.