• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2004년도 하계종합학술대회 논문집(1)
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• pp.189-192
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• 2004

A LNA module, integrated microwave assemblies (IMAs) were developed for use in Ka-band Satellite Communication Satellite Payload that operates in the frequency range of 29,6 ${\~}$ 30.0GHz. The module will be placed directly behind their respective antenna feed horns to minimize the required waveguide and system noise figure impact. Two MMIC LNA Chips were used in the module design. The measured result shows that the module has 32dB gain and 2.4dB NF performance. The module size is 51m ${\times}$ 36m ${\times}$ 22 and the mass is 92g. The Noise Figure performance is the best result of currently available modules for satellite payload operating in the same frequency range. The module will be assembled using space-qualified process and tested for space qualification.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2003년도 학술회의 논문집 정보 및 제어부문 A
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• pp.171-174
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• 2003

In this paper, a Learning module for a reconfigurable neural network processor(ERNIE) was proposed for an On-chip learning. The existing reconfigurable neural network processor(ERNIE) has a much better performance than the software program but it doesn't support On-chip learning function. A learning module which is based on Back Propagation algorithm was designed for a help of this weak point. A pipeline structure let the learning module be able to update the weights rapidly and continuously. It was tested with five types of alphabet font to evaluate learning module. It compared with C programed neural network model on PC in calculation speed and correctness of recognition. As a result of this experiment, it can be found that the neural network processor(ERNIE) with learning module decrease the neural network training time efficiently at the same recognition rate compared with software computing based neural network model. This On-chip learning module showed that the reconfigurable neural network processor(ERNIE) could be a evolvable neural network processor which can fine the optimal configuration of network by itself.

• 한국경영과학회지
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• 제14권2호
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• pp.27-42
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• 1989

REA 모델은 EA 모델의 구성요소인 측면을 역할측면, 연산측면, A-PART-OF 측면, IS-A 측면, 속송측면 등의 5개 측면으로 분류한 모델이다. EATPS 는 사용자 인터페이스모듈, 지식생성 모듈, 인스턴스 관리 모듈, 스키마 구조관리 모듈, 무걸성검사 모듈등의 5개 모듈로 구성된 지능적 지식표현 시스템의 REA 모델에 의해 대화식 (interactive) 으로 생성하고 관리한다. 본눈문에서는 EATPS 의 구성과 기능, 지식 정의언어인 EAKDL 의 구조및 대화식 형성, 지식생성 모듈의 구성과 기넝, 클래스 생성 모듈의 기능과 알고리즘, 그리고 상속추론메카니즘을 도입한 생성모듈의 기능 및 알고리즘을 제시하였다.

• 한국정보통신학회논문지
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• 제9권5호
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• pp.1111-1116
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• 2005

초고속 인터넷의 보급, 디지털 정보장비의 확산 및 생활 패턴의 변화에 따라 홈 네트워크의 필요성이 점차 확대되고 있다. 이에 따라 본 연구에서는 홈 네트워크화를 위해서 8051 MCU, Hardware TCP/IP를 이용하여 임베디드 이더넷 모듈을 설계, 개발하였다. 타겟 머신에 간단한 웹 서버를 구축하고 이를 이용한 원격제어 프로그램을 포팅하여 원격지에서도 인터넷으로 가전기기를 제어할 수 있도록 하였다. 본 연구에서 개발한 모듈을 이용하므로 저가격으로 홈 오토메이션을 구현할 수 있으리라 생각한다.

• 한국태양에너지학회 논문집
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• 제34권5호
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• pp.23-31
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• 2014

This study was accomplished to get the foundation design data of VMD(Vacuum Membrane Distillation) system for Solar Thermal VMD plant. VMD experiment was designed to evaluate thermal performance of VMD using PVDF(polyvinylidene fluoride) hollow fiber hydrophobic membranes. The total membrane surface area in a VMD module is $5.3m^2$. Experimental equipments to evaluate VMD system consists of various parts such as VMD module, heat exchanger, heater, storage tank, pump, flow meter, micro filter. The experimental conditions to evaluate VMD module were salt concentration, temperature, flow rate of feed sea water. Salt concentration of feed water were used by aqueous NaCl solutions of 25g/l, 35g/l and 45g/l concentration. As a result, increase in permeate flux of VMD module is due to the increasing feed water temperature and feed water flow rate. Also, decrease in permeate flux of VMD module is due to increasing salinity of feed water. VMD module required about 590 kWh/day of heating energy to produce $1m^3/day$ of fresh water.

• 한국포장학회지
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• 제15권1호
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• pp.7-16
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• 2009

The purpose of this study was to evaluate current packaging modules and design the most acceptable packaging module for domestic and international distribution systems. An optimum packaging module can reduce package costs as well as total distribution costs such as transport, materials handling and warehouse costs. Three different sizes of packaging modules, namely U-type($600{\times}500\;mm$), K -ype($550{\times}366\;mm$) and I-type($600{\times}400\;mm$), were evaluated in terms of the area efficiency and MOEs(measures of effectiveness) for the T-11($1100{\times}1100mm$) and T-12($1,200{\times}1,000\;mm$) pallets. The results showed that the U-type module could fit very well for both pallets and the area efficiency of each module was more than 99 percents. Area efficiency of K-and I-type modules was greatly affected by the pallet footprint dimensions. U-type module also performed better result from MOEs evaluation. Twenty sub-multiple sizes derived from the U-type module were suggested for the future development of the Korean and ISO standards on dimension of transport packages.

• 한국전자파학회논문지
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• 제23권11호
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• pp.1280-1287
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• 2012

3.2~6.5 GHz 광대역 특성을 갖는 YTO(YIG Tuned Oscillator) 모듈을 설계 및 제작하였다. 위상 잡음 특성을 개선하기 위해 샘플링 믹서를 이용한 offset PLL(Phase Locked Loop) 구조로 설계하였다. 이 방식은 샘플링 믹서, 위상 비교기, 루프 필터, 전류 드라이버 회로, YTO로 구성된다. 측정 결과, 4.5 GHz에서 위상 잡음은 수식으로 도출한 값과 유사한 10 kHz offset 주파수에서 -100 dBc/Hz를 얻었다. 제작된 YTO 모듈의 위상 잡음은 동작 주파수 대역에서 기존 PLL 구조에 비해 10 dB 이상 우수함을 확인하였다.

• 한국정보통신학회논문지
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• 제14권8호
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• pp.1855-1860
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• 2010

본 논문은 웹 서비스 표준을 이용하여 안전한 메시지 전송을 위한 웹서비스 시스템을 구현하였다. 본 시스템은 싱글사인온 모듈과 SSL(Secure Socket Layer) 모듈과 안전한 메시지 모듈로 구성되어 있다. 이들 모듈들을 적용하기 위해 가격비교사이트를 대상모델로 하여 설계하였다. 싱글사인온 모듈은 SAML(Security Assertion Markup Language) 표준을 사용하였으며, 또한 권한부여와 인증을 제공한다. SSL 모듈은 종단 간에 메시지 암호화를 처리하기 때문에, 시스템의 메시지를 안전하게 전송한다. 또한 안전한 메시지 모듈은 웹 서비스 보안 표준을 따르는 XML암호화와 서명을 적용하였다.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2004년도 하계학술대회 논문집 Vol.5 No.2
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• pp.710-713
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• 2004

The design, simulation, modeling and measurement of a low temperature co-fired ceramic (LTCC) RF switch module for GSM applications is presented in this paper. RF switch module is constructed using a Rx/Tx switching circuit and integrated low pass filter. The low pass filter function was designed to operate in th GSM band. Insertion and return loss of the low pass filter were designed less than 0.3 dB and better than 12.7 dB at 900 MHz. The RF switch module contained 10 embedded passives and 3 surface mount components integrated on $4.6{\times}4.8{\times}1.2$ nm, 6-layer multi-layer integrated circuit. The insertion loss of switch module was measured at 900 MHz was 11 dB.

• Journal of the Optical Society of Korea
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• 제15권1호
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• pp.44-51
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• 2011

In this paper, an easy-to-use measurement device for illumination distribution is developed. The device consists of a sensor array module, a control module, and a PC interface. The sensor array module incorporates CIE 1931 color sensors and the ARM-based 96 MHz microcontroller in the control module for measurement and data processing. The sensor array module contains 64 color sensors arranged in a $16{\times}4$ array. The sensitivity of the sensor array module can be adjusted depending on the illumination level to be measured. The measurement data and control signals are exchanged via USB 2.0 standard. To demonstrate the performance of the device, the illumination distribution is measured for colors of red, green, and blue and is graphically shown. The device can be used for measurement of the illumination distribution, design and adjustment of LED illumination.