Abstract: Disclosed is a multi-output DC/DC converter controlling power-conversion switching in synchronization with a frequency of one output voltage among multiple output voltages in an LLC resonant DC/DC converter. The multi-output DC/DC converter includes a power conversion circuit performing alternate switching on an input DC voltage to output multiple DC voltages including a first DC voltage and a second DC voltage each having a preset voltage level, and a control circuit controlling the alternate switching of the power conversion circuit in synchronization with a preset resonant frequency.

Abstract: A method and system of B2C e-commerce for placing an order to purchase fashionable items for minimizing the return rate after selling via the Internet. The order is placed by a first banner window at seller's website for displaying a prerecorded digital video image of a model of the same or similar size of the buyer wearing the clothes that the buyer wants to purchase, and a second banner window for displaying a static digital image of the model for synthesizing the face of model, hair patterns, foot-wear or accessories such as necklace, earrings, hairpin, or sunglasses selected by the buyer from the database of the system. This provides a technology to reduce the return rate by checking the fashionable products whether suitable with the figure and face image of the buyer before placing an order through a cyber fashion show and synthesizing the image for confirming coordination.

Abstract: This invention relates to provide a pedestrian signal system not only for the normal pedestrian but also for the blinds, the disabled person of weak sight, and the illiterates by displaying the remaining time of each signal change in image figures at the signal head and by generating voice signal in real time. It reduces the cost of the system fabrication, installation and maintenance of the system by combining the five functions of the pedestrian signals such as a walk signal, a stop signal, a remaining time of each signal of red/green and/or the voice generator for blinds in a one signal head. Also, this invention provides the useful double safety traffic signal system especially for a school zone by installing LED studs on the stop line at crossroad for warning to drivers by blinking the LED studs automatically when the walk signal is on-mode.

Abstract: The present invention is to provide a lubricant-supplying apparatus for dry-wire drawing, and a method of supplying the same, which effectively prevents a lubricant tunnel phenomenon, thus allowing an easy supply of the lubricants during high-speed dry-wire drawing, and which enables deteriorated lubricants or a lump of lubricants to be pulverized and reused.

Abstract: This invention is related to a method and a system apparatus for replacing the conventional key with user's personal digital data which users are always carrying for the multi-way control of a vehicle for a normal driving, an abnormal driving, an anti-carjacking, a keyless ignition and a key-free valet parking, as well as the multi-way control of the keyset of a safe, a filing cabinet, a lockable door, and a military armaments according to the digital data of user's input without installing a costly PC network. Accordingly, the present invention also provides a system apparatus of the hotel door lock system which hotel guests make their own digital unlocking system utilizing their own personal card or password for replacing the existing key so that it does not need any special cards nor keys to carry extra.

Abstract: The present invention is to provide a lubricant-supplying apparatus for dry-wire drawing, and a method of supplying the same, which effectively prevents a lubricant tunnel phenomenon, thus allowing an easy supply of the lubricants during high-speed dry-wire drawing, and which enables deteriorated lubricants or a lump of lubricants to be pulverized and reused.

Abstract: This invention relates to the method of cyber education through internet capable to check the true attendance of a cyber class by a fingerprint and calculate the accumulative learning time of each registered lectures by the host computer for the scholastic management of the cyber education system. In addition, utilizing this invention, it provides a pre-school system by using a game and animation created for pre-school curriculums capable to evaluate the education development of each children with a method for calculating the accumulative learning time of each subject by individual ID, and a software system for studying subjects at a stage of character formation for kids and evaluating the mental development of human being by means of playing game.

Abstract: The present invention is related to a security cabinet system for storing the main body of the PC, having 3-ways PC control system for entering users ID data with a keypad system on the container, in order to prevent any unauthorized access to the PC for transmitting or duplicating data, or disassembling PC to separate HDD data storage device, and having a means to control the ambient temperature in the PC container. This system perfectly protects the PC against any unauthorized access to operate the PC with various software means as well as attempts with hardware means to separate the HDD from the PC by any unauthorized persons together, and provides the user with the simplest solution to control the PC without opening the cabinet by using users ID data which users are always carrying with them by a form of a bank's card, a drive license, a fingerprint or a password.

Abstract: This invention relates to an airconditioning system which uses a plurality of absorption chiller-cells, for refrigerating an antifreeze fluid that is circulated through fan-coil units of an airconditioning system. The anti-freeze fluid passes through refrigerant evaporators in each cell structure in a consecutive order for lowering the temperature of the antifreeze fluid gradually. More particularly, it relates to an absorption chiller-cell system having a plurality of evaporators employing multi-refrigerant circulation circuits in an absorption cycle to produce sufficient refrigerant for the airconditioning system. The invention enables the physical size of the system to be relatively small, so that the system can replace conventional electric airconditioning units for home applications.

Abstract: This invention is related to a method and a system apparatus for replacing the conventional key with user's personal digital data which users are always carrying for the multi-way control of a vehicle for a normal driving, an abnormal driving, an anti-carjacking, a keyless ignition and a key-free valet parking, as well as the multi-way control of the keyset of a safe, a filing cabinet, a lockable door, and a military armaments according to the digital data of user's input without installing a costly PC network Accordingly, the present invention also provides a system apparatus of the hotel door lock system which hotel guests make their own digital unlocking system utilizing their own personal card or password for replacing the existing key so that it does not need any special cards nor keys to carry extra.

Abstract: This invention relates to an airconditioning system which uses a plurality of absorption chiller-cells, for refrigerating an antifreeze fluid that is circulated through fan-coil units of an airconditioning system. The anti-freeze fluid passes through refrigerant evaporators in each cell structure in a consecutive order for lowering the temperature of the antifreeze fluid gradually. More particularly, it relates to an absorption chiller-cell system having a plurality of evaporators employing multi-refrigerant circulation circuits in an absorption cycle to produce sufficient refrigerant for the airconditioning system. The invention enables the physical size of the system to be relatively small, so that the system can replace conventional electric airconditioning units for home applications.

Abstract: An aerial spray system can be attached to the undersurface of a helicopter for spraying ground level targets while the helicopter is hovering or in level flight. A television camera can be located in near proximity to the spray nozzles for electronically delivering a picture of the ground level condition to a television monitor in the helicopter, such that the technician is better enabled to aim the spray nozzles or target a specific ground level area. The aerial system can be used for riot control, or crop spraying, or forest fire containment.

Abstract: A receiver for use in a cellular communication system includes a first amplifying circuit for amplifying a received signal, an attenuating circuit for selectively attenuating the amplified signal in response to a control signal, a first converting circuit for converting the attenuated signal into an intermediate frequency signal, a second amplifying circuit for amplifying the intermediate frequency signal, a limiter for limiting the amplitude of the amplified intermediate frequency signal, a second converting circuit for converting the current of the amplified intermediate frequency signal or the amplitude-limited intermediate frequency signal into a first direct voltage, a determiner for outputting the control signal for attenuating a received signal strength indicator (RSSI) of the amplified signal by a predetermined strength if the first direct voltage is greater than a predetermined reference voltage and for adding a predetermined voltage with the first direct voltage and then for outputting the added vol

Abstract: A frequency-modulation modulator in a cellular wireless telephone for modulating frequency after uniformly and linearly compensating for frequency characteristics to be suitable for each engaged channel in a cellular wireless telephone. Since frequency modulation characteristics are compensated uniformly and linearly according to each one of a plurality of channels, an error due to the frequency distorted modulation can be prevented and the cellular wireless telephone becomes more reliable.