• 한국광학회:학술대회논문집
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• 한국광학회 2000년도 제11회 정기총회 및 00년 동계학술발표회 논문집
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• pp.300-301
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• 2000

DVD는 CD사이즈의 광디스크에 고화질기 MPEG2 디지털 압축동화를 두 시간이상 수록할 수 있는 기록 및 재생기기로써 최초의 규격서가 1996년 8월에 발행되었다. 650nm의 적색반도체레이저와 개구수 0.6의 대물렌즈를 채용한 광픽업으로 직경 12cm의 단면디스크에 CD-ROM의 약 7배인 4.7GB에서 17GB까지의 용량저장이 가능하다. 변조방식은, DC성분을 억제할 수 있고, 또한 DR(Density Ratio)이 큰 EFM-Plus 변조를 채용하고, 에러정정방식은 32kB를 하나의 블록으로 하는 Reed Solomon Product code이다. File system은, 음성, 화상데이터와 컴퓨터 데이터를 통합할 수 있도록 계층구조로 하고, ISO9669 파일시스템과 UDF파일시스템을 함께 사용하고 있다. (중략)

• 한국발생생물학회지:발생과생식
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• 제19권3호
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• pp.153-161
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• 2015

For the 2 years of farming, at the indoor circulating aquaculture system, four kinds of skeletal deformities were found among 60 Far Eastern catfish, Silurus asotus. Deformities saw jawbone's luxation, abnormality of upper lip and malocclusion. Spinal deformity was most fatal deformities with low weight and small length. Jawbone's luxation had 1 maxilla and 2 mandibles. Abnormality of upper lip had just lip was back over. Malocclusion's left maxilla and right maxilla were not balanced. This experiment was any deformities in this species through the deformity can grasp how it affects.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2001년도 하계종합학술대회 논문집(1)
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• pp.193-196
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• 2001

To reduce third-order intermodulation distortion(IMD3) generated in the down-conversion process of the mixer, predistortion technique was proposed and its performance was verified fDr Cellular band circuit. This method is based on the fact that down converted IMD3 of a down conversion mixer could be canceled by that of predistortor with a fine tuned vector modulator. Two tone test has been performed at 836 Mhz with 442 KHz separation. The results showed that IM3 level was improved about 16dB and PldB of the mixer was increased 3dB. from the above results, the suggested technique is useful to design the down converters for communication system .

• 대한치과보존학회:학술대회논문집
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• 대한치과보존학회 2001년도 추계학술대회(제116회) 및 13회 Workshop 제3회 한ㆍ일 치과보존학회 공동학술대회 초록집
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• pp.589.1-589
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• 2001

The aim of this study is to evaluate the effect of light intensity variation on the polymerization rate of composite resin using IB system(experimental equipment designed by Dr. IB Lee) by which real-time volumetric change of composite can be measured. Methods: Three commercial composites [Z100(Z1), AeliteFil(AF), SureFil(SF)] were photopolymerized with Variable Intensity Polymerizer unit (Bisco, U.S.A.) under the variable light intensity (75/150/225/300/375/450㎽$^2$) during 20sec.(omitted)

• 한국정보과학회:학술대회논문집
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• 한국정보과학회 2012년도 한국컴퓨터종합학술대회논문집 Vol.39 No.1(B)
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• pp.360-362
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• 2012

교통수단의 발달과 생활수준의 향상으로 도로에 차량이 많이 늘어나고 교통사고가 많이 발생함에 따라, 교통사고 자동인식 시스템에 관한 연구가 많이 진행되고 있다. 본 논문에서는 카메라의 위치에 따라 두 객체의 관심영역 사이의 겹침을 해석하는 것이 달라져 규칙이 변하는 것을 방지하고, 사람의 추론과정과 같이 교통사고를 퍼지 규칙으로 모델링하여 획득한 데이터가 부정확할 경우에 발생하는 잘못된 추론을 보정하기 위한 퍼지 규칙기반 시스템을 제안한다. 카이스트 삼거리에서 촬영한 9개의 사고 시나리오 데이터에 대해 실험하여 DR 87.34%, CDR 89.13%, FAR 10.75%의 결과를 얻었고, 이를 기존의 규칙기반 시스템, 규칙-확률 시스템과 비교하였다.

• International Journal of Quality Innovation
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• 제10권1호
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• pp.53-76
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• 2009

As the flourish of today's supply chain, the traditional model of replenishment will cause accumulation of excessive inventory to the retailers and customers, or cause shortages and inability to meet the demands. To solve this problem, Theory of Constraints (TOC) proposed the replenishment model of demand-pull, combined with the establishment of factory-ware-house to achieve performance improvement. In the absence of empirical research, this study applied the Bean Game developed by Dr. Goldratt to design a supply chain system for different scenarios, in order to allow players and managers better understanding and supporting the TOC replenishment method through the operations of the game.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제10권11호
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• pp.5437-5454
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• 2016

A Wireless Sensor Network (WSN) is composed of several sensor nodes which are severely restricted to energy and memory. Energy is the lifeblood of sensors and thus energy conservation is a critical necessity of WSN. This paper proposes a clustering algorithm namely Energy Efficient Trustworthy Clustering algorithm (EETCA), which focuses on three phases such as chief node election, chief node recycling process and bi-level trust computation. The chief node election is achieved by Dempster-Shafer theory based on trust. In the second phase, the selected chief node is recycled with respect to the current available energy. The final phase is concerned with the computation of bi-level trust, which is triggered for every time interval. This is to check the trustworthiness of the participating nodes. The nodes below the fixed trust threshold are blocked, so as to ensure trustworthiness. The system consumes lesser energy, as all the nodes behave normally and unwanted energy consumption is completely weeded out. The experimental results of EETCA are satisfactory in terms of reduced energy consumption and prolonged lifetime of the network.

• 전자공학회논문지A
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• 제33A권4호
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• pp.78-83
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• 1996

A timing recovery circuit of 10 Gbit/s optical receiver is described. The circuit consists of a passive NRZ-to-PRZ circuit, a dielectric resonator filter (DRF) and a narrow band amplifier, which for the first time adopted a temperature compensation technique using the tempareature characteristics of DR. The experimental results showed an output clock phase variation of less than ${\pm}$6 degree over the operating temperature range form 0$^{\circ}C$ to 75$^{\circ}C$ and measured maximum rms jitters of less than 2 phs with the resonance detunings of up to ${\pm}$10 MHz. These experimental results show that the circuit is a suitable for 10 Gbit/s lightwave transmission system.

• 한국토양동물학회지
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• 제5권1호
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• pp.1-4
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• 2000

게거미과의 연구는 별로 되어 있지가 않아 그 분류학적인 지위도 아직은 확실하지가 않다. 1892년 Simon이 그래도 심도있게 연구한것을 최근 Ono가 연구를 해오고 있는 실정이다. 새우게거미과가 처음에는 게거미과의 아과로 취급되어 왔으나 최근 몇몇 학자들의 계속적 연구로 독립된 별개의 과로 승격시켰으며 게거미과와 새우게거미과의 분류계통을 소개하고자 한다. 게거미목의 과·속명은 Kim(1998)의 방식에 따랐다.

• E2M - 전기 전자와 첨단 소재
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• 제10권1호
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• pp.20-25
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• 1997

In this study, piezoelectric actuator samples were fabricated using 0.375PMN-0.37OPT-0.255PZ system ceramics with Barium substitution and the strain properties of them were investigated. Dielectric constant of the specimens increased with the increase of Ba content up to 5mol% and decreased with futher addition of Ba. The largest piezoelectric coefficient and electromechanical coupling coefficient were observed at the sintering temperature of 1250'C and Barium content of 5mol%. The characteristics of strain hysteresis was found largely with varing the sintering temperature on the single round type, and the strain is proportional to piezoelectric coefficient.