• 한국공작기계학회:학술대회논문집
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• 한국공작기계학회 1997년도 춘계학술대회 논문집
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• pp.82-87
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• 1997

In order to make unmanned machining systems with satisfactory performances, it is necessary to incorporate appropriate condition monitoring systems in the machining workstation to provide the required intelligence of the expert. This paper deals with condition monitoring for tool wear and fracture during turning operation. Developing economic sensing and identification methods for turning processes, sound pressure measurement and digital signal processing technique are proposed. The validity of the proposed system is confirmed through the large number of cutting tests.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 1995년도 추계학술대회 논문집
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• pp.361-364
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• 1995

Wavelet Transform is a new tools for signal processing, such as data compressing extraction of parameter for Reconition and Diagnostics. This transform has an advandage of a good resolution compared to Fast Fourier Transform (FFT) In this study, we employ the wavelet transform for analysis of Acoustic Emission raw signal generated form rotary compressor. In abnormal condition of rotary compressor, the state of operating condition can be classified by analizing coefficient of wavelet transformed signal.

• 한국복합재료학회:학술대회논문집
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• 한국복합재료학회 2003년도 추계학술발표대회 논문집
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• pp.63-66
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• 2003

The effect of punching density and material composition on the tensile properties and optimum condition of manufacturing of carbon needle punched perform was studies. The interlaminar tensile strength were increased but the intralaminar tensile strength were decreased with increasing punching density. In the case of the performs composed of continuous oxi-PAN fabrics, there was a considerable improvement of the interlaminar and intralaminar tensile strength.

• 소성∙가공
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• 제6권3호
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• pp.221-226
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• 1997

Chevron crack in cold extrusion has been studied in view of deformation conditions and material characteristics. There is V formed chevron crack is occasionally occurred in core part of shaft by multistage free extrusion. Although many research results were reported and theoretical analyses were accompanied, in this study we discussed practical method to prevent chevron crack in the field of working conditions and material characteristics. We have found that chevron crack is eliminated under condition of high hydrostatic state in deformation and decreased segregation, refinement of micro structure of materials.

• 한국공작기계학회:학술대회논문집
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• 한국공작기계학회 2000년도 추계학술대회논문집 - 한국공작기계학회
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• pp.51-56
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• 2000

This study is to implement automatic inspection system of motor body panel by visual system. since it is inefficient to examine adhesion condition of components with the naked eye, image processing algorithm is presented to replace the existing manual inspection process with an automatic inspection process the developed automatic inspection system presents tile examination method of the adhesion condition of components with a pixed camera, which leads to an increase of the productivity and a reduction of manufacturing cost

• Applied Biological Chemistry
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• 제41권2호
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• pp.147-152
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• 1998

수산가공 부산물을 기능성 식품가공 소재로 이용하기 위한 일련의 연구로 기능성 어류 뼈 칼슘제의 제조 조건(회수방법 및 autoclaving 시간) 및 칼슘제의 특성에 대하여 살펴보았다. 명태 뼈에 물을 가하고 autoclaving한 칼슘제가 기타 방법으로 제조한 칼슘제에 비하여 칼슘함량은 낮았고, 수율 및 칼슘 가용화율은 높았다. 칼슘제 제조를 위한 autoclaving 처리시간은 40분간 처리한 것이 이보다 단시간 처리한 것보다 칼슘의 함량 및 가용화율은 높았고, 수율은 낮았다. 그러나 이보다 장시간 처리한 것과는 이들 성분에서 차이가 없었다. 이상의 결과로 미루어 보아 명태 뼈에 물을 가하고 40분간 autoclaving한 칼슘제가 기타 어종, 방법 및 autoclaving 시간으로 제조한 것보다 우수하다고 판단되었다. 이 조건으로 제조한 칼슘제는 산성조건(pH 2)에서 1시간동안 진탕$(37^{\circ}C)$으로 거의 가용화 되었고, 이를 중성조건(pH 7.0)에서 3시간동안 진탕$(37^{\circ}C)$함으로서 약 59%가 가용화 되었다.

• Applied Science and Convergence Technology
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• 제24권4호
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• pp.102-110
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• 2015

Fluid model based numerical analysis is done to simulate a plasma processing system with electrodes at floating potential. $V_f$ is a function of electron temperature, electron mass and ion mass. Commercial plasma fluid simulation softwares do not provide options for floating electrode boundary value condition. We developed a user subroutine in CFD-ACE+ and compared four different cases: grounded, dielectric, zero normal electric field and floating electric potential for a 2D-CCP (capacitively coupled plasma) with a ring electrode.

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2006년도 춘계학술발표대회
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• pp.1251-1254
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• 2006

본 논문에서는 우리사회에 심각하게 퍼져 있는 인터넷 게임중독을 청소년 환경을 중심으로 고찰하고 우리 사회의 인터넷 게임중독을 진단하고 문제점을 제기하여 해결할 수 있는 방안을 모색 해 보고자 한다. 본 논문에서는 이의 해결책의 일환으로 가정환경, 학교환경, 교우관계를 고려한 개선방법을 제시하였고 더불어 지역사회와 대중매체에서 행해져야 할 개선점을 제시하였다.

• 한국인쇄학회지
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• 제12권1호
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• pp.35-45
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• 1994

The monobath method is accomplished using chemical solution, as processing in a developing and fixing at the same time, into which the exposed photographic material is placed. For this study, we appointed some values to be a standard that to coming as a results by normal processing with the developer D-76 for film Fuji Neopan SS 35mm, and which is compared with a monobath process. The experimental results show that processed condition is useful and applicable in monobath, for FX-6a and Keelan No.315.

• Journal of Information Processing Systems
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• 제3권2호
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• pp.54-63
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• 2007

The high-speed mobile Internet has recently been expanded, many attractive services are provided. However, these services require some form of security-related technology. This paper outlines Japanese mobile services and exposits some mobile security topics including mobile spam, mobile malware, mobile DRM system, mobile WiMAX security, and mobile key management.