• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2009.11a
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• pp.264-264
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• 2009

The sensitivity lighting of pendant type used Micro-controller AVR, embodiment method for Munsell chromaticity diagram system and adoption method for light source lens respectively. About a plan design of light fixture, LED circuit designed flow chart of circuits and LED driver of organizations in electron device. For used Solidworks soft ware program, LED light source must take a heat shink part and LED light fixture module for sensitivity lighting of pendant type into considerations

• Journal of the Korea Academia-Industrial cooperation Society
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• v.11 no.8
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• pp.2958-2962
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• 2010

We developed a Microcurrent acupuncture point treatment equipment using micro-controller AVR. This equipment can generate a sine wave, triangle wave, square wave and DC. The frequency range of waves like the sine wave and the triangle wave is 1 - 320 Hz and the output range of DC is $40-200\;{\mu}A$. The duration is controllable between a minute to 30 minutes.

• Journal of Energy Engineering
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• v.20 no.4
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• pp.353-357
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• 2011

An embedded two-axis solar tracking system was developed by using AVR micro controller for enhancing solar energy utilization. The system consists of an Atmega128 micro controller, two step motors, two step drive modules, CdS sensors, GPS module and other accessories needed for functional stability. This system is controlled by both an astronomical method and an optical method. Initial operation is performed by the result from the astronomical method, which is followed by the fine controlled operation using the signals from Cds sensors. The GPS sensor generates UTC, longitude and latitude data where the solar tracker is installed. A database of solar altitude, azimuth, and sunrise and sunset times is provided by UART (Universal Asynchronous Receiver/Transmitter).

• Proceedings of the KAIS Fall Conference
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• 2006.11a
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• pp.129-132
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• 2006

본 논문에서는 AVR8535 Micro Controller와 PC의 Parallel EPP Protocol을 이용하여 PC환경에서의 디지털 오실로스코프를 개발하였다. 기존의 오실로스코프는 고가이고 휴대하기가 어려워 필요시에 실험을 측정하기에 불편한 점을 해결하기 위해 저가격의 사용하고 휴대하기 편리한 디지털 오실로스코프를 개발하였다. 어플리케이션 프로그램은 MFC를 이용하였으며 파형 측정 기능과 측정된 데이터를 범용의 데이터형식으로 추출하여 여러 측정환경에 응용할 수 있도록 개발하였다.

• Journal of the Korean Solar Energy Society
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• v.35 no.6
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• pp.1-7
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• 2015

This paper deals with the design and operation of a hybrid daylighting system that uses natural and artificial lighting to enhance visual comfort in buildings. The system was developed using an AVR micro controller for solar tracking in conjunction with dimming controls, which, acting together, enables the maximum use of natural daylight and also improves energy efficiency in buildings. Experimental results clearly demonstrates the usefulness of the present system capable of enhancing indoor lighting conditions when sufficient daylight is available and distributed appropriately in harmony with artificial lighting.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.30 no.4
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• pp.527-536
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• 2020

It has been found that an attacker can extract the secret key embedded in a security device and recover the operation instruction using power consumption traces which are some kind of side channel information. Many profiling-based side channel attacks based on a deep learning model such as MLP(Multi-Layer Perceptron) method are recently researched. In this paper, we implemented a disassembler for operation instruction set used in the micro-controller AVR XMEGA128-D4. After measuring the template traces on each instruction, we automatically made the pre-processing process and classified the operation instruction set using a deep learning model CNN. As an experimental result, we showed that all instructions are classified with 87.5% accuracy and some core instructions used frequently in device operation are with 99.6% respectively.

• Journal of the Speleological Society of Korea
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• no.81
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• pp.35-41
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• 2007

According as the industry develops recently, the import and export freight amount is increasing sharply, but physical distribution processing equipment ability had achieved conveyance, surge and setup of physical distribution by human's labor ability. But, inefficiency is indicated in operation of product line and warehouse or physical distribution storage equipment because is ceilinged the processing physical distribution amount and the efficiency in physical distribution processing by these labor ability.

• Proceedings of the Korean Information Science Society Conference
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• 2004.04a
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• pp.124-126
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• 2004

본 논문에서는 유비쿼터스 헬스케어 시스템을 위한 센싱 단말기 구현 내용을 설명한다. 본 연구에서 설계한 유비쿼터스 헬스케어 시스템은 센싱 단말기, 처리 단말기, DB 서버, 전문가 서버로 구성된다. 센싱 단말기는 사용자의 생체 신호를 검출하고 처리한 후 그 결과를 무선 통신을 통해 처리 단말기로 전달한다. 본 연구에서 구현한 센싱 단말기는 8MHz로 동작하는 AVR MicroController 처리기와 맥박 센서, 그리고 Bluetooth 무선 통신 모듈로 구성되어 있다. 또한 5개의 포트별로 8개의 입력 라인이 있어 다중 센싱 (Multi-Modal Sensing)이 가능하며, Bluetooth를 지원하는 다양한 처리 단말기와 연동이 가능하다는 특징을 갖는다. 실험결과 사용자의 생체 신호를 제대로 검출하여 무선 통신으로 전달함을 알 수 있었다.

• Journal of Biosystems Engineering
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• v.28 no.2
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• pp.117-126
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• 2003

This study was conducted to develop precision control system fur cold storage facility that could offer safe storage environment for green grocery. For that reason of neuro-fuzzy control system with learning ability algorithm and single chip neuro-fuzzy micro controller was developed for cold storage facility. Dynamic characteristics and hunting of neuro-fuzzy control system were far superior to on-off and fuzzy control system. Dynamic characteristics of temperature were faster than on-off control system by 1,555 seconds(123% faster) and fuzzy control system by 460 seconds(36.4% faster). When system was arrived at steady state. hunting was ${\pm}$0.5$^{\circ}C$ in on-off control system, ${\pm}$0.4$^{\circ}C$ in fuzzy control system, and ${\pm}$0.3$^{\circ}C$ in neuro-fuzzy control system. Hunting of humidity and wind velocity was also controlled precisely by 70 to 72.5% and 1m/s For storage experiment with onion, characteristics of neuro-fuzzy control system were tested. Dynamic characteristics of neuro-fuzzy control system made cold storage facility conducted precooling ability and minimized hunting.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.17 no.9
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• pp.745-752
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• 2016

In the era of the Internet of Things, where all physical objects are connected to the Internet, we suggest a remote control system using a Raspberry Pi single-board computer with ZigBee, which can turn an indoor light-emitting diode (LED) and a multiple-tap on and off, and with a smart phone can control the brightness of the LED as well as an electronic door lock. By connecting an infrared (IR) transmitter module to the Raspberry Pi, we can control home appliances, such as an air conditioner, and we can also monitor indoor images, indoor temperatures, and illumination by using a smart phone app. We developed a method of finding out IR transmission codes required for remote-controllable appliances with an AVR micro-controller. We suggest a method to remotely open and shut an office door by novating the door lock. The brightness level of an LED (between 0 and 10) can be controlled through a PWM signal generated by an ATmega88 microcontroller. A mutiple-tap is controlled using an ATmega32, a photo-coupler, and a TRIAC. The signals for measured temperature and illumination are converted from analog to digital by using the ATtiny44A microcontroller transmitting to a Raspberry Pi through SPI communication. Then, we connect a camera to the CSI head of the Raspberry Pi. We can turn on the smart multiple-tap for a certain period of time, or we can schedule the multi-tap to turn on at a specific time. To reduce standby power, people usually pull out a power code from multiple-taps or turn off a switch. Our method helps people do the same thing with a smart phone, if they are away from home.