• 한국공작기계학회:학술대회논문집
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• 한국공작기계학회 2004년도 추계학술대회 논문집
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• pp.309-314
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• 2004

A flexible disk grinding system process has been introduced that utilized varying disk orientation with respect to workpiece along with the applied feed speed. Various process conditions including cutting speed, maximum feed speed and orientation angles could applied to observe process outcomes. Even though continuous and constant feed speed has been applied to the process, the results from the trapezoidal input velocity profiles would be observed and compared. Based on the control strategies including neural network methodologies, several output results were compared to find the optimum process condition. Two axis control results were displayed showing better performance with higher trajectory error for larger training epoch.

• 한국공작기계학회:학술대회논문집
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• 한국공작기계학회 2004년도 추계학술대회 논문집
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• pp.108-113
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• 2004

The compressive axial collapse tests were performed to investigate energy absorption characteristics of Al/CFRP compound tubes which are aluminum tubes wrapped with CFRP (Carbon Fiber Reinforced Plastics) outside the aluminum circular and square tubes. Based on collapse characteristics of aluminum tubes and CFRP tubes respectively, the axial collapse tests were performed for Al/CFRP compound tubes which have different fiber orientation angles. Test results showed that Al/CFRP compound tubes supplemented the unstable brittle failure of CFRP tubes due to ductile nature of inner aluminum tubes. In the light-weight aspect, specific energy absorption were the highest for Al/CFRP, CFRP in the middle, and aluminum the lowest. Also, specific energy absorption of circular tubes was higher than square tubes'. It turned out that fiber orientation angle of Al/CFRP compound tubes influence specific energy absorption together with the collapse modes of the tubes.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2000년도 제15차 학술회의논문집
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• pp.434-434
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• 2000

It is the main problem to measure the position and orientation of a robot end effector for the calibration of robots. The calibration methods can be used as a tool to improve the accuracy of robots without change of the arm or control architecture of robots. But such calibration methods require the accurate measurements. Dynamic measurement of position and orientation Provides a solution of this problem and improves dynamic accuracy by dynamic calibration o( robots. This paper describes the development o( the laser tracking system capable of determining the static and dynamic performance of industrial robots. The structure and system components are presented and basic experimental results are included to demonstrate the instrument performance. The system can be applied to the remote controlled mobile robots as weil as the calibration of robots.

• 대한가정학회지
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• 제43권6호
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• pp.37-46
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• 2005

Advertising is the most powerful marketing communication tool. Fashion magazines are a popular media for fashion advertising because of their multi-color visual printing. In this study, the interest in and attitude toward fashion advertising were investigated with high school girls in Seoul, along with their interrelation with buying experience and post-purchase satisfaction. The consciousness of the endorser and the fashion of celebrities both increased with rising interest in fashion advertisement. However, the brand orientation showed no relationship with the interest in fashion advertisement. The interest in fashion advertisement was useful to explain buying experience with limited variance. The correlation between brand orientation and buying experience increased with rising interest in fashion advertisement, indicating that those with little interest in fashion advertisement showed strong dependence on brand loyalty. Those with more interest in fashion advertisement counted distinctive aspects of fashion advertisement more seriously. Affective aspects of fashion advertisement showed a correlation with buying experience and post-purchase satisfaction.

• 한국안전학회지
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• 제16권3호
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• pp.135-142
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• 2001

본 연구에서는 복합소재인 GFRP(Glass Fiber Reinforced Polyester)의 2차원 절삭공정에서 주파수 스팩트럼과 절삭 메커니즘과의 연관성에 관하여 논의한다. 해석방법으로는, 공정중 발생하는 절삭력 신호를 FFT에 의해 주파수 분석하고 주파수 스팩트럼과 다양한 칩형성 메커니즘과의 연관관계를 모델링한다. 특히, 섬유경사각(Fiber orientation angle), 절삭변수 그리고 공구형상이 절삭 메커니즘에 미치는 영향을 평가하였다.

• 한국공작기계학회:학술대회논문집
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• 한국공작기계학회 2002년도 추계학술대회 논문집
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• pp.24-29
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• 2002

In any rapid prototyping process, the layer by layer building process introduces an area error between the staircase and the surface line specified by the computer-aided design model. This affects the dimensional accuracy as well as the surface finish for different part build orientations. This paper describes a methodology for computing the area error for any orientation of the part built by the fused deposition modelling system. This technique can be applied to determine the best build orientation of the part, based on the minimum area error. This technique is verified by comparing the results with the experimental measurements of the area error of the parts built at different orientations.

• 한국공작기계학회:학술대회논문집
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• 한국공작기계학회 2003년도 추계학술대회
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• pp.374-378
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• 2003

From linear motor feed system model, two axis control rules have been applied. As an application process, a flexible disk grinding system process has been also introduced that utilized varying disk orientation with respect to workpiece along with the applied feed speed. A known process model methodologies has been used to fomulate processed surface profiles. Various process conditions including cutting speed, maximum feed speed and orientation angles could applied to observe process results sensitivities. Even though continuous and constant feed speed has been applied to the process, the results from the trapezoidal input velocity profiles would be observed and compared.

• 한국콘텐츠학회논문지
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• 제20권4호
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• pp.348-357
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• 2020

기업가정신에 대한 논의가 활발해지고 있지만 실제 중소기업이나 벤처기업에서 활용할 수 있는 방법론에 대해서는 많은 논의가 이루어지지 않고 있으며, 성과 측정이나 활용에 대한 연구는 부족한 실정이다. 따라서 본 연구에서는 중소기업이나 벤처기업에 적용 가능한 기업가적 지향성과 R&D 역량, 시장점유율, BSC 미래가치 창출 간의 관계를 실증 분석하였다. 한국직업능력개발원의 '인적자본기업패널(Human Capital Corporate Panel, 이하 HCCP)'중 최근의 7차연도(2017) 데이터를 SmartPLS3.0을 활용하여 구조방정식(SEM) 모형으로 요인분석과 가설 검증을 하였다. 실증 분석 결과 기업가적 지향성은 R&D 역량과 BSC의 미래가치 창출에 정(+)의 영향을 미치며, 기업가적 지향성은 R&D 역량을 매개로 시장점유율의 정(+)의 영향을 미쳤다. 반면에 기업가적 지향성과 시장점유율 간의 관계는 통계적으로 유의하지 않게 나타났다. BSC의 미래가치 창출도 기업가적 지향성과 시장점유율 간의 관계를 매개하지 못했다. 따라서 본 연구에서는 시장을 선도하는 기업이 되기 위해서는 구성원의 기업가적 지향성을 통해 R&D 역량을 키워나가는 것이 필요하다는 것을 증명하였다. 또한, 기존에 성과관리의 측정 도구로 사용된 BSC는 기업가적 지향성과 시장점유율간의 관계를 매개하지 못했다는 것은 시사하는 바가 크다고 할 수 있다. 혁신을 지향하는 미래의 기업들은 기업 수준의 기업가 정신을 측정하고 성과를 관리할 수 있는 새로운 지표에 대한 고민이 필요할 것이다.

• 한국공작기계학회:학술대회논문집
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• 한국공작기계학회 2004년도 춘계학술대회 논문집
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• pp.58-63
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• 2004

This study is to investigate a fracture characteristics of carbon fiber reinforced plastics (CFRP) under the tensile loading as a function of acoustic emission (AE) according to the frequency analysis (transient mode) and AE source location (location mode). It was found that the fracture mechanism of AE frequency analysis was a useful tool for the estimation of different type of fracture in CFRP, i.e., matrix(epoxy resin) cracking, delamitation and fiber breakage same as AE amplitude distribution.

• 한국CDE학회논문집
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• 제2권3호
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• pp.186-194
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• 1997

This paper describes new methods to minimize the cutting time in zigzag milling operation of two dimensional polygonal surfaces. Previous works have been focused on mainly experimental approaches by considering some machining parameters such as, spindle speed, depth of cut, cutter traverse rate, cutter diameter, number of teeth, tool wear, life of tool, and so on. However, in this study, we considered two geometrical factors one by one in order to see the effect separately, which are the length of cut and the number of cutter traverse. In an N-sided concave or convex polygon, an algorithm has been developed which minimize the total length of cut. Also, a heuristic approach was used to minimize the number of cutter traverse.