유한요소법을 이용한 기둥형 로드셀의 비선형성 평가

배준우,황재근,박경흠,양희준,이춘열 嶺南大學校 工業技術硏究所 2004 工業技術硏究所論文集 Vol.32 No.1

Recently, force measurement systems are commonly used in many industrial fields and the precision of the measurement system is getting more important as the industry needs more precise tools and instruments to make high quality products. However, a high precision force measurement system is hard to make unless we know precisely the causes, quality and quantity of measurement errors in advance. In this work, many possible mechanical causes of measurement errors are reviewed including ratio of length to diameter of sensing part, radius of contact area, radius of bearing part, ratio of material properties and change of boundary conditions. Also, the measurement errors are analyzed by nonlinear finite element method and the nonlinear behavior of the errors are investigated. The results can be used to design force measurement systems and expected to be very useful especially for compact type load cells.

레이저 표면경화면과 마찰면의 프랙탈 차원 적용에 관한 연구

배춘익,옥철호 慶南專門大學 2001 論文集 Vol.29 No.1

MIM 샌드위치 구조의 전도메카니즘에 관한 연구

배선기,박창엽,남춘우 연세대학교 산업기술연구소 1984 논문집 Vol.16 No.1

In this study, the MIM devices of Al-Al₂O₃-Al, Al-Al₂O₃-Ag structure with junction area ??[㎠] and thickness of oxide layer 30[Å] were fabricated, and then those conduction mechanism and characteristics were investigated. The results, at low voltage region the voltage-current characteristics was ohmic because of the quantum mechanical tunneling and hopping process, and at high voltage region the voltage-current characteristics was I∝V² because of the space charge limited conduction. The voltage which transited from ohmic to I∝ V² and the barrier height were 110[mV], 0.42[eV] of Al-Al₂O₃-Al device and 90[mV], 0.44[eV] of Al-Al₂O₃-Ag device respectively. The polarity dependence of voltage-current characteristics was found only in Al-Al₂O₃-Ag device because of the intrinsic field in insulator thin film.

절삭속도가 절삭온도와 공구수명에 미치는 영향

배춘익,김준안 慶南專門大學 1999 論文集 Vol.27 No.1

중이온 빔 조사에 의한 담배의 돌연변이 유도와 내염성 식물의 선발

배창휴,Abe, Tomoko,민경수,김동철,정재성,이춘환,임용표,이효연 충남대학교 생물공학연구소 1999 생물공학연구지 Vol.7 No.-

중이온 빔을 이용한 방사선 돌연변이의 기초자료를 얻고자 담배의 수분·수정 직후의 원배에 100 Gy의 중이온빔을 조사하여 M_1세대의 종자를 얻었다. NaCI 2.0과 2.5%를 포함된 MS배지에 M_1 세대의 종자를 파종하여 17개통의 NaCI 저항성 식물체를 선발하였다. 저항성 식물체는 BY-4품종에 ^14N빔을 조사한 처리구에서만 관찰되었다. M_1 세대의 저항성 식물체의 경우 영양생장기간 중에는 외형적 변이가 관찰되지 않았으나 생식생장기의 화기에 있어서는 다양한 변이가 관찰되었다. 특히 암술 수술의 길이의 변화, 꽃잎의 변화, 불완전 화분립, 줄기당 꽃의 착생수 감소 등의 변이가 발생하였다. M_1 세대에서 17개의 NaCI저항성 계통 중에서 8계통은 M_2 세대에도 저항성형질이 발현되었고, 또한 M_2 세대의 3계통은 Mannitol이 포함된 배지에서 저항성을 보여주었다. Tobacco proembryos were irradiated with 100 Gy of heavy-ion beams (^14N, ^20Ne : 135 Mev/u) after 24 to 96 hours of pollination as a mutagen and screened M_1 generation for morphological mutants and salt-tolerant plants. Morphological and physilolgical characteristics of the salt-tolerant plants derived from the irradiated proembryo are discussed in this report. Mutants irradiated porembryos with the beams after pollination produced various kinds of morphological variation. A total of 17 salt-tolerant plants were selected from tobacco cultivar (BY-4) by treatment with ^14N beam. Shapes of filament and pollen grain of most salt-tolerant plants were abnormal compared with non-irradiated wild type, and seeds weight and fertility obviously decreased. The germination rates of the several M_2 lines on the saline and the mannitol condition were higher than that of wild type.

기계구조용 탄소강의 표면개질을 위한 펄스 YAG 레이저의 적용

배춘익,옥철호 慶南專門大學 2000 論文集 Vol.28 No.1

절삭속도가 절삭온도와 공구수명에 미치는 영향(Ⅰ)

배춘익,장영석 慶南專門大學 1998 論文集 Vol.26 No.1

廣開土大王陵碑文 硏究(Ⅰ) : 碑文의 文段과 解釋을 中心으로

安春培 동아대학교 1992 考古歷史學志 Vol.8 No.-

A Study on Improvement of Electrical Stability in Semi-Conducting ZnO Ceramic Varistors Sintered in Oxygen Ambient

박춘배,소순진,김영진 원광대학교 2001 論文集 Vol.26 No.-

산소, 대기, 질소 아르곤 분위기에서 각각 서로 다른 4 종류의 시편이 소결되어졌다. 이들 4 종류에 대한 열화 특성을 연구하기 위해 115℃에서 가속 DC 열화시험이 이루어졌다. 미세구조 내에서 원소들의 분석을 위해 전자현미분석기(EPMA)가 이용되어졌다. DC 열화시험 이전의 전기적 특성의 모든 시편에 대해 거의 비슷한 특성을 보였으나, 열화시험 이후에는 각각의 시편에 대해 큰 차이를 보였다. 열화시험 이후에 4 종류의 시편들 중 산소분위기에서 소결된 ZnO 바리스터가 가장 우수한 특성을 보였으며, 이들 결정립에서 Zn 원소는 가장 많이 존재하고 O원소는 가장 적게 존재함을 밝혔다. Four different samples of ZnO ceramic varistors were sintered in oxygen, air, nitrogen and argon ambient, respectively. To investigate the degradation characteristics for these four samples, an accelerated DC degradation test was performed at 115℃ , Electron Probe Microanalysis (EPMA) was used to analyze the elemental content in microstructure, The samples have very similar electrical properties before the DC degradation test. After, however, each of the samples shows significant difference. It was found that ZnO varistors sintered in oxygen ambient show superior properties after the degradation test, the their gains have the highest Zn and the lowest 0 elements content among four samples. KEYWORDS : ZnO, varistor, degradation, EPMA, ambient sintering

韓·中·日 初中高校生의 體格과 最大成長發育年齡에 관한 硏究 : 1987年을 中心으로

박춘배,최중명,박순영 慶熙大學校 1990 論文集 Vol.19 No.-

On the basis of the presented data which took boy and girl students and their subjects in Korea, Japan and Republic of China n 1987, the authors intended to compare and analyze the physique-growths(body height and body weight) of the three nations' students from May 1 in 1989 to April, 30, 1990 with the application of the medians of Korea, Republic of China and Japan. The result are as follows : A. Physical growth and development 1. Body height(cm) In case of male students, Korean students are superior in their body heights to Japanese students when they are before the year 10, but from 10 to 20, both of nations' students are same. And them students of Republic of China are all inferior to those of Korea and Japan through all these ages. In case of girl students, Koreans are taller than Japanese and Repulic of China through all these ages. Chinese are inferior in their heights to Korean and Japanese through all these ages. The interchange ages of the body height occured in the both sexes of 9.5-12.5 in Korean, 9.5-12.5 in Republic of China and 9.0-12.0 in Japan. During this period, girls are taller than boys, but after this period boys are taller than girls, Maximum growth age per year for male in Korea is the ages 12-13(8.71cm) and these for female is the ages 11-12(6.90cm) of Korean students. 2. Body weight(kg) In case of male, Japan students show similar growing degrees through all the ages, and the students of Korea and Republis of chinese indicate a little lower degree than Japan. In case of female, the similar phenomena are showed. The interchange ages of the body weight occured in the both sexes of 9.0-13.0 in Korea, 105-13.5 in Republic of China, and 10.0-12.5 in Japan. The MGA per year for male is the ages 12-13(7.01kg) in Korea, 13-14(5.46kg) in Republic of China, and 11-12(5.5kg) in Japan, while for female is the ages 11-12(2.72kg) in Korea, 10-11 and 11-12(4.39kg) in Republic of China, and 11-12(4.39kg) in Republic of China, and 11-12(5.1kg) in Japan, respectively. B : Maximum growth age(M.G.A) Comparison growth ages of Korean, Republic of China and Japanese students are as follows. Kore : Body height : Male 12.33 Female 11.32 Body weight : Male 12.36 Female 11.61 R.O.C : Body heigt : Male 13.27 Female 10.69 Body weight : Male 13.52 Female 11.50 Japan : Body height : Male 12.28 Female 9.88 Body weight : Male 11.94 Female 11.13