• Electric Engineers Magazine
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• s.353
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• pp.46-47
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• 2012

2011년 11월 03일(목) 13:20경, 경남 사천시 소재 ${\bigcirc}{\bigcirc}$ 건설이 시공하는 22.9kV 선로 신설 연장 공사 중 활선작업차에서 절연용 방호구를 설치하는 작업 중, 인체가 선로에 접촉하여 감전 사망한 사고임.

• Korean journal of applied entomology
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• v.8
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• pp.25-28
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• 1969

In order to find out the effect of contactor to form appressorial structure of Glomerella glycines, this experiment was carried out by using several contactors such as cover glass. cellophane, vinyl and oil paper respectively. In the case of cover glass placed on a drop of conidial suspension of the fungus which is incubated on water agar for 12 hours, 67.7 percent of appressoria were resulted, whereas no appressorial structure was found in the control. Vinyl was known best physical contactor and cellophane, cover glass and oil paper were fairly good in that order. Effects of temperature, time and relative humidity on the formation of appressoria of G. glycines were similar to each of optimum growth range of temperature and relative humidity $25^{\circ}-30^{\circ}C$ and 70-100 Percent, respectively. In addition, maximum appressorial formation was resulted in the conidial suspension incubated on soybean leaves for 36 hours. No appressorium was found at above $35^{\circ}C$, below R.H. 70 percent and 5 hours incubation.

• Computational Structural Engineering
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• v.6 no.3
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• pp.89-97
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• 1993

General formulation to analyse the rectangular thin plate on a soil medium by energy method is developed. In the problem, Boussinesque's formular needs to be integrated after assuming the contact stress distribution. Two different functions, i.e., power series and Chebychev polynomials are used to approximate the contact stress distribution. It was found that Chebychev polynomials are better function to describe the contact stress than power series. Chebychev polynomials considering stress singularity around plate boundary is recommended as the desirable shape function for future research.

• Transactions of the Korean Society of Mechanical Engineers
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• v.16 no.6
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• pp.1171-1178
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• 1992

An experiment was performed to describe the heat and mass transfer occurring between hot waste gas and cold water through direct contact in a direct contact heat exchanger. This model was then used to obtain an equation of overall heat transfer coefficent based on heat exchanger volume. The diffusion heat transfer rate is 2-3 times larger than the convection heat transfer rate as results of condensation of the water vapor contained in the waste gas. The boiler efficiency increases over 10%.

• Transactions of the Korean Society of Mechanical Engineers B
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• v.35 no.11
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• pp.1147-1156
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• 2011

A contact-type area-varying capacitive displacement sensor, or CLECDiS, can measure displacements over millimeter ranges with nanometer resolution. However, a small changes in the contact condition due to the surface profile or friction, which are inherent characteristics of contact-type sensors, lead to significant distortion of the output signal. Therefore, ensuring reliable contact conditions during CLECDiS measurements is the most important area to be improved in their actual use. Herein, in order to design an instrument for ensuring reliable contact conditions, the contact condition is analyzed by characterizing the signal distortion, observing the pressure distribution between the contacting surfaces, and measuring the motional errors of the sensor using a laser Doppler vibrometer (LDV). The manufactured instrument enables a CLECDiS to be used in an ultraprecise positioning system with improved reliability.

• Journal of the KSME
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• v.32 no.2
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• pp.184-193
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• 1992

현재의 3차원 측정기 중에서 CNC 3차원 측정기, 3차원 측정기의 데이터 처리장치 및 측정용 센서에 대해서 알아보았다 3차원 측정기는 공작기계와 많은 관계가 있지만 로봇, CAD/CAM 과도 밀접한 관계를 지니고 있다. 또한 3차원 측정기는 센서와도 밀접한 관계가 있다. 앞으로 더욱 바람직한 것은 3차원 형상의 고속연속측정이 가능하게 하는 것, 접촉점의 위치좌표가 고 정도로 구해지는 것 마찰력을 제거할 수 있는 것, 소형, 경량화 등을 열거할 수 있겠다. 한편, 비접촉 센서로서는 광학적 방법을 이용한 센서가 많이 개발되어지고 있지만 표면거칠기, 표면 반사율, 경사각 등의 영향을 받기 쉽기 때문에 고정도의 3차원 측정에 있어서 아직 많은 문제가 남아 있다. 앞으로도 이 같은 많은 문제점을 해결할 수 있는 연구가 계속 진전되기를 바란다

• Proceedings of the KIEE Conference
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• 2003.07c
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• pp.1976-1977
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• 2003

3차원 영상저장과 복원에 이용되어왔던 변형 삼각간섭계를 이용하여 비접촉진단에의 응용가능성을 연구한다. 변형 삼각간섭계를 이용하여 측정대상물체의 간섭패턴을 3-5개 구하고 이로부터 위상지도를 얻고 이로부터 변형량을 계산할 수 있다는 것을 이론적으로 제시한다.

• 대한치주과학회:학술대회논문집
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• 1999.11a
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• pp.77-77
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• 1999

• 프린팅코리아
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• s.27
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• pp.164-167
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• 2004

한국 HP의 HP인디고 디지털 인쇄기 총판 계약자인 로지트코퍼레이션이 9월 22일 서울시 강남구 압구정동 부근에 HP인디고 디지털 인쇄기 데모센터를 개장, 고객과의 접촉을 확대하고 디지털 인쇄기의 장점을 적극 부각시킴으로써 국내 인쇄 시장을 공략한다는 계획이다.

• Transactions of the Korean Society of Mechanical Engineers
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• v.13 no.4
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• pp.583-594
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• 1989

The strong nonliner dynamic behavior of mechanical systems in the presence of clearances are studied. The nonlinearity is induced from the assumed symmetric piecewise-linear characteristics for stiffness and damping by the contact and uncontact. Based on Stoker's assertion concering the reasoning beyond the occurrence of subharmonics, the nonlinear differential equation is converted to four nonlinear algebraic equations form the boundary conditions at the contact points. For a single contact per half exciting period, under the assumption of symmetric response, the steady-state solutions obtained are in agreement with those of numerical integration. Also a nondimen-sionalized formulation is made for the purpose of parametric studies.