• IE interfaces
• /
• v.10 no.1
• /
• pp.67-77
• /
• 1997

반도체 제조공정에서 패터닝 공정과 박막형성 공정은 매우 중요한 위치를 차지하고 있다. 본 논문의 목적은 위 두가지의 공정을 최적화하기 위한 품질공학적 접근방법을 소개하는데 있다. 특히, 패터닝 공정의 전사성과 박막현상 공정의 두께의 균일성에 관한 문제를 동특성의 문제로 정형화하고 신호인자를 어떻게 설정할 것인가에 관해 논의하였다.

• Proceedings of the Membrane Society of Korea Conference
• /
• 1997.10a
• /
• pp.141-142
• /
• 1997

1. 서론 : 중공사막은 제조과정인 wet spinning의 과정에서 defect가 형성될 수 있어 분리선택도에 큰 영향을 미친다. 이러한 defect의 처리방법으로는 dipping method등의 방법이 현재 널리 쓰이고 있다. dipping method는 제조된 중공사막을 PDMS등의 고분자 용액 속으로 통과시켜 결과적으로 중공사막 표면에 얇은 고분자막이 형성되도록 하는 방법이다. 그러나 이러한 방법으로 중공사막을 처리할 경우 고분자 용액이 pore내로 침입하거나 중력으로 인하여 용액의 아래쪽으로 몰려 하반부의 두께가 두꺼워진다는 단점이 있다.(생략)

• Journal of the KSME
• /
• v.16 no.2
• /
• pp.1-5
• /
• 1976

구미의 공업교육은 해석중심에서 종합에 비중을 두는 방향으로 크게 변하고 있는 것 같다. 따 라서 설계교육에 대하여도 여러 가지의 시도가 이루어지고 있으며 새로운 방향을 발견하려고 노력하고 있다. 우리나라나 일본의 경우는 전시, 전후할것없이 제도교육이나 설계교육도 거의 변화가 없다. 우리나라와같이 격봉하는 나라로서 왜 이 점만 구태농연한지 의문이다. 어떻든 울 리나라의 중화학고업의 발전육성의 모체가 종합설계기술이며 이것을 두어깨에 짊어지고 나갈 역군인 공학도의 교육이 중대함을 통감하면서 더욱 설계제도교육에 역점을 두어야 한다는 생각을 간절히 느끼며 새로운 설계제도교육의 방향으로 흐름의 동기가 되기를 기원하는 바이다.

• Journal of Global Scholars of Marketing Science
• /
• v.5
• /
• pp.79-101
• /
• 2000

본 연구의 목적은 사이버 주식투자의 성과를 중심으로 이익 투자자와 손실 투자자로 구분하고 투자자의 행태 변수에 대하여 두 집단간에 어떠한 차이가 있는지를 규명하고자 하는 것이며 나아가 이러한 특성변수들이 투자성과와 어떠한 연관성을 가지는지를 분석하고자 하는 것이다 연구의 결과 두 집단간에 유의적인 차이를 보이면서 투자성과에 보다 큰 영향을 미치는 변수로는 가격하락시의 손절매(stop loss) 사용 빈도, 매수후 해당 종목의 평균 보유기간, 매수후 현금(잔금)보유비율의 정도, 하락시 재매수의 정도, 평균 보유 종목수, 일밀 평균 거래 횟수, 동일 종목에 대한 분할 매수 빈도, 가격 하락시 반응, 평균 확습시간, 손실 발생 원인, 언론에 대한 반응 등이었다.

• Proceedings of the Korea Information Processing Society Conference
• /
• 2008.11a
• /
• pp.774-777
• /
• 2008

지리정보는 여러 분야에서 활용되고 그 데이터 양도 방대하여 효율적으로 저장하여 관리해야 할 필요가 있다. 본 논문은 균등 분할 방식과 비균등분할 방식에 의한 두 가지 지리정보 표현 및 압축방법을 수행하는 연산회수와 자료의 효율성 등을 중심으로 비교하였다. 두 가지 방법 모두 효율적인 활용이 가능하며 상황에 따라 기본 방법에서 수정을 가하여 사용할 수도 있다.

• Korean Journal of Applied Biomechanics
• /
• v.18 no.4
• /
• pp.59-65
• /
• 2008

The purpose of this study was to investigate the shift of COP pathway and the plantar foot pressure among level walking and stairs and ramp climbing in young and elderly people. Plantar foot pressure was measured by MatScan system(Tekscan, USA). Statistical analysis was used One-way ANOVA to know the characteristics of peak plantar pressure during walking with different the facilities. In young adults, COP pathway during stairs climbing was slightly shorten and trended to abduct at forefoot. COP pathway during ramp climbing was also shorten but trend to adduct at forefoot. Peak plantar pressure of 2-3 metatarsal head and heel during ramp climbing was more decreased than level walking. In elderly people, COP pathway during stairs climbing was more shorten and abducted than leve walking and COP pathway during ramp climbing was more unstable than level walking. Peak plantar pressure of first metatarsal head increased at stair climbing and decreased at ramp climbing. That of second metatarsal head and heel was more decreased at ramp climbing. Conclusionally, Peak plantar pressures of each foot region generally increased and more changed during ramp climbing.

• (The)Study of the Eastern Classic
• /
• no.36
• /
• pp.333-374
• /
• 2009

Korean traditional education emphasizes moral education than any other country or culture. Education is recognized as practical task for self-realization and self-transcendence in traditional Confucian community. This study starts from two questions. First, how moral education in Korea from late in the 19th, when the modernized schooling started, to now can be classified according to social and political circumstances? Second, what is the main issue of moral education in the progress of Korean education after independence from Japanese imperialism? Especially, this study focuses on reflecting and reviewing these issues by context of Eastern moral education. After late in the 19th century, moral education in Korea is divided into three types: "Education for loyalty and filial piety and Moral cultivation", "Citizenship education and Education for anti-communism", and "Moral education and Character education". This study mainly insists these types of moral education distort the sprit by political interests rather than inherit and develop sprit or basic value of moral education. Furthermore, this study discusses characteristic of moral education and way to improve based on important two issues in Korean society; "Nationalism in moral education" and "Western biased education" Making individual's free will into group consciousness in accordance with political power group's interests rather than developing moral community based on each one's character building, nationalism in moral education deepens self-alienation. Western biased education makes self-negation as it considers western as core, and Korea and other traditional ideas as side. This study emphasizes reanalysis Eastern moral education and need effort for understanding of Eastern moral education to overcome Western biased education in Korean moral education.

• The Journal of Korean Institute of Communications and Information Sciences
• /
• v.39A no.6
• /
• pp.310-321
• /
• 2014

Effect of substrate thickness, perforation position and size on the bandwidth and radiation characteristics of a proximity coupled perforated microstrip patch antenna (PCPPA) with $2{\times}2$ square perforations inside a patch is investigated. As the thicknesses of antenna substrate and feed substrate increase, the bandwidth of a PCPPA increases without the degradation of radiation characteristics. As the position of a perforation moves toward the edge of a patch along the length direction, the bandwidth of a PCPPA increases without the degradation of radiation characteristics, while the effect of changing the position of a perforation along the width direction on the bandwidth and radiation characteristics of a PCPPA is negligible. As the perforation size is decreased, the bandwidth of a PCPPA is increased and the radiation characteristics of a PCPPA are enhanced.

• KSCE Journal of Civil and Environmental Engineering Research
• /
• v.31 no.2B
• /
• pp.121-128
• /
• 2011

The paper presents trend analyses of the past 60-year-data of intensity (central pressure) and duration of the typhoons that influenced the Korean Peninsula. The singular spectrum analysis was employed to extract the trends. The result of linear regression of the trend component shows that the intensity of typhoons is slightly increased. A long-term change with period of about 30 years was detected, and thus the original series were separated into two sub-periods of 30 years. For these sub-periods, normal and Gumbel distributions of central pressure and duration of typhoons were estimated. The results show that during the second sub-period the overall intensity of typhoon was increased but the occurrence of extreme typhoons remains unchanged. The duration also showed an obvious increase during the second sub-period.

• KSCE Journal of Civil and Environmental Engineering Research
• /
• v.26 no.3D
• /
• pp.393-400
• /
• 2006

This study is intended to examine the characteristics of driver in the use of guide sign in urban areas. The good and bad points about guide sign based on landmark point and guide sign based on street name are demonstrated, and driver's preference between them are studied. The questionnaires given to general persons deal with general guide signs and road maps, and are designed to see if they can find out current location on the road map with guide sign. According to the results, drivers prefer guide sign based on street name to guide sign based on landmark. And guide sign based on street name took less time to find current location than with guide sign based on landmark.