• 한국측량학회지
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• 제19권4호
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• pp.395-404
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• 2001

본 연구는 토지종합정보시스템구축 사업 중에서 2단계 구축 과정을 효과적으로 구현하기 위한 방안을 제시하기 위한 것으로 영상(도면, 문서) 입력방법, 지적도면 전산화 방법 그리고 구축된 전산자료의 활용 및 갱신등을 효과적으로 수행할 수 있는 프로그램의 개발에 관해서 연구를 수행하였다. 궁극적으로는 이러한 연구를 통해서 토지종합정보시스템의 지적도면 전산화 업무 작업의 효율성 제고와 정확한 자료의 구축 및 신속하고 효율적 활용에 본 연구의 목적이 있다. 본 연구에서 개발된 프로그램이 지적업무 전산화에 맞게 설계되어 이원화 되어있는 각각의 분야별 작업의 통합을 가능하게 하여 업무의 전문성을 기할 수 있으며, 지적수치 자료작성 및 공유체계 구축에 소요되는 시간 및 비용을 절감하고 결과물의 완성도를 높일 수 있었다.

• 소성∙가공
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• 제11권6호
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• pp.529-537
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• 2002

A series of load-relaxation tests and tensile tests were conducted to study the high temperature deformation mechanism of fine duplex gamma TiAl alloy at temperatures ranging from 800 to 105$0^{\circ}C$. Results of load relaxation test showed that deformation behavior at a small imposed strain ($\varepsilon$≒0.05) was dominated by dislocation glide and dislocation climb. To investigate the deformation behavior at a large amount of strain, the processing map was constructed using a dynamic materials model. Two domains were characterized in the processing map obtained at a strain level of 0.6. One domain was found at the region of 98$0^{\circ}C$ and $10^{-3}/sec$ with a peak efficiency of 48%, which was identified as a domain of dynamic recrystallization from the microstructural observation. The order was observed at the region of 125$0^{\circ}C$ and $10^{-4}/sec$ with a peak efficiency of 64%. The strain rate sensitivity measured indicates that the material was deformed by the superplasticity in the region.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2016년도 추계학술대회
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• pp.670-671
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• 2016

자동화 수동변속기는 수동변속기에 액츄에이터를 설치하여 자동으로 수동변속기를 변속할 수 있게 한 변속기로써, 자동화 수동변속기의 조작 편의성과 수동변속기 수준의 높은 연비로 인해 대형 상용차에 많이 적용되고 있다. 대형 상용차에 적용되는 12단 자동화 수동변속기는 다른 자동 변속기와 마찬가지로 자동변속로직과 변속맵에 의해 변속시점을 결정하지만 기존의 방식으로는 변속충격, 클러치 마모, 연비저하 등의 문제점이 발생할 수 있다. 본 논문은 12단 자동화 수동변속기에 알맞은 변속로직 및 변속맵의 설계와 성능확인시험에 대한 내용을 다루고 있다.

• International Journal of Internet, Broadcasting and Communication
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• 제7권2호
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• pp.16-27
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• 2015

Holography technology which was developed by Dennis Gabor (1900~1979) in 1948 is a technology to record wave planes of actual 3D objects. It is known as the only technology which can express 3D information most perfectly close to human-friendly. Holography technology is widely used in advertisement, architecture and arts as well as science technology areas. Especially, digital holographic print which is an applied area is greatly used in military map, architecture map and cultural asset restoration by printing and reproducing 3D information. Holography is realized by recording and reproducing the amplitude and phase information on high resolution film using coherent light like laser. Recording materials for digital holographic printer are silver halide, photoresist and photopolymer. Because the materials have different diffraction efficiency according to film characteristics of each manufacturer, appropriate guide lines should be suggested through efficiency analysis of each film. This paper suggests appropriate guide lines through the diffraction efficiency measurement of silver halide which is a holographic printer recording medium. And the objective of this study is to suggest appropriate guide lines through diffraction efficiency analysis of Ultimate 08-C and PFG-03C which are commercially used. The experiment was prepared by self-diffraction efficiency system which measures the strength with the defector by penetrating RGB recording medium and concentrating diffracted beams through collimating lens. The experiment showed Geola's PFG-03C which is a silver halide for full color has price/performance advantage in optical hologram recording, but recording angles and reproduction angles are irregular for digital holographic printer recording. Ultimate's Ultimate08-C for full color shows its diffraction efficiency is relatively stable and high according to recording angles and laser wavelength.

• 대한기계학회논문집A
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• 제39권2호
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• pp.195-201
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• 2015

전기굴삭기는 배터리에 저장된 에너지로 전동기-유압펌프를 구동해서 유압 에너지를 생성하고 이를 작업에 활용한다. 기존 유압굴삭기의 유압펌프는 디젤 엔진의 운전 효율에 최적화된 레귤레이터에 의해 제어되고, 유압펌프 자체의 효율은 고려되지 않았다. 전기굴삭기는 배터리를 에너지원으로 사용하기 때문에 전동기의 효율뿐 아니라 유압펌프의 효율을 함께 고려한 제어가 요구된다. 통합 제어를 위해서 유압펌프와 전동기의 출력과 효율 특성을 분석하여 효율맵을 작성하였고, 이를 바탕으로 최적동작맵을 구성하고 통합 제어 알고리즘을 개발했다. 알고리즘의 효과를 확인하기 위해 전기굴삭기 MILS 를 구성해서 통합 제어 알고리즘을 적용했다. 굴삭기 작업 시뮬레이션 결과는 통합 제어 알고리즘이 시스템 효율을 향상 시켰음을 보여준다.

• 한국통신학회:학술대회논문집
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• 한국통신학회 2004년도 하계종합학술발표회논문초록집
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• pp.264-264
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• 2004

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 1999년도 하계종합학술대회 논문집
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• pp.425-428
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• 1999

Turbo decoder were shown to achieve performance within 0.7㏈ of the Shannon capacity limit. This constituted a significant gain in power efficiency over other coding techniques known at the time. In this paper, Turbo code with constraint length K＝4, code rate 1/3, frame size 196bits(6 tail bits), 20㎳ frame and 6bit MAP decoder is implemented using VHDL. The designed Turbo code is used for voice service. Interactions of the system are used to attain large performance improvements.

• 한국통신학회:학술대회논문집
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• 한국통신학회 2004년도 추계종합학술대회 논문 초록집
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• pp.316-316
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• 2004

• 미생물학회지
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• 제24권1호
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• pp.12-17
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• 1986

A new computer algorithm is described to order the restriction fragments of plasmid DNA which has been cleaved with several restriction endonucleases in single or double digestions rapidly with realistic error rates. The permutation and high weight on small fragments methods construct all logical circular map solutions. The program is written in Apple BASIC and run on an Apple II plus microcomputer with 64K memory. Several examples are presented which indicate the high efficiency of the profram in construction possible restriction map for YEp24.

• 한국자동차공학회논문집
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• 제8권4호
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• pp.186-193
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• 2000

EPS(Electric Power Steering) systems have many advantages over traditional hydraulic power steering systems in space efficiency engine efficiency and environmental compatibility. In this paper an EPS system control logic using a torque map is proposed. The main function of the EPS system is to reduce the steering torque exerted by a driver by assist of an electric motor. Vehcile speed steering torque and steering wheel angle are measured and fed back to the EPS control system where appropriate assist torque is generated to assist the operator's steering effort. Another capability of the EPS system for easy adaptation to different steering feels via simple tuning is demonstrated by the experiments. It will be also verified that the EPS system can also improve damping and return performance of the steering wheel by control of the assist motor.