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김정묵(Jeong-Mook Kim),김성윤(Sung-Yun Kim),이영철(Young-Chul Rhee) 한국지능시스템학회 2010 한국지능시스템학회 학술발표 논문집 Vol.20 No.1
본 논문에서는 성장 추세에 있는 정전용량형 터치패널의 특성과 동작원리를 분석하여 평가방법을 제시하였다. 사람의 손이나 특정 물체의 접촉에 의한 미세 전류변화를 감지하여 정전용량형 터치패널의 주요 성능지표 도출을 통해 평가항목을 결정하고, 이를 측정함으로써 정전용량형 터치패널의 주요 성능지표간의 상관관계에 대하여 분석 하였다. 본 논문에서 제시한 평가방법의 적용 가능성과 일반성을 검증하기 위한 측정 데이터를 제시하고 정전용량형 터치패널의 신뢰성 및 생산성이 향상될 수 있도록 정전용량형 터치패널의 평가방법에 대하여 제안하였다.
김종도,김정묵,Kim, Jong-Do,Kim, Jeong-Mook 한국마린엔지니어링학회 2007 한국마린엔지니어링학회지 Vol.31 No.5
Aluminum and aluminum alloys have high rate of lightness, recycling property and excellent specific strength. Fields using them have been widening because they ould satisfy both energy reduction and high efficiency in manufactures production. But they have many problems on welding due to high thermal conductivity and reflectivity, so the study to solve these problems ate proceeding actively around the world. This study was purposed to improve weldability and spread application range for aluminium alloys by using the unique property of aluminium which absorb high energy around $800{\mu}m$ wavelength and the higher temperature, the mote absorbtion of laser beam on preheating by multi-wavelength laser beam(pulsed Nd:YAG laser + diode laser with $808{\mu}m$ wavelength). The favorable mechanical properties were acquired by the test results of strength, hardness and leak of weld metal which had reduced its defect like crack and so on.
원자력발전소의 방사성폐기물 드럼 운반을 위한 볼트체결방식의 두꺼운 철판을 이용한 IP-2형 운반용기의 구조 안전성 해석 및 시험
이상진,김동학,이경호,김정묵,서기석,Lee, Sang-Jin,Kim, Dong-hak,Lee, Kyung-Ho,Kim, Jeong-Mook,Seo, Ki-Seog 한국방사성폐기물학회 2007 방사성폐기물학회지 Vol.5 No.3
If a type IP-2 transport package were to be subjected to a free drop test and a penetration test under the normal conditions of transport, it should prevent a loss or dispersal of the radioactive contents and a more than 20% increase in the maximum radiation level at any external surface of the package. In this paper, we suggested the analytic method to evaluate the structural safety of a type IP-2 transport package using a thick steel plate for a structure part and a bolt for tying a bolt. Using an analysis a loss or dispersal of the radioactive contents and a loss of shielding integrity were confirmed for two kinds of type IP-2 transport packages to transport radioactive waste drums from a waste facility to a temporary storage site in a nuclear power plant. Under the free drop condition the maximum average stress at the bolts and the maximum opening displacement of a lid were compared with the tensile stress of a bolt and the steps in a lid, which were made to avoid a streaming radiation in the shielding path, to evaluate a loss or dispersal of radioactive waste contents. Also a loss of shielding integrity was evaluated using the maximum decrease in a shielding thickness. To verify the impact dynamic analysis for free drop test condition and evaluate experimentally the safety of two kinds of type IP-2 transport packages, free drop tests were conducted with various drop directions. For the tests we examined the failure of bolts and the deformation of flange to evaluate a loss or dispersal of radioactive material and measured the shielding thickness using a ultrasonic thickness gauge to assess a loss of shielding integrity. The strains and accelerations acquired from tests were compared with those by analyses to verify the impact dynamic analysis. The analytic results were larger than the those of test so that the analysis showed the conservative results. Finally, we evaluated the safety of the type IP-2 transport package under the stacking test condition using a finite element analysis. Under the stacking test condition, the maximum Tresca stress of the shielding material was 1/3 of the yielding stress. Two kinds of a type IP-2 transport package were safe for the free drop test condition and the stacking test condition.
金正默,申榮吉 慶北大學校 師範大學 1976 敎育硏究誌 Vol.18 No.-
Finding in this study are summarized as follows: 1. for man-10(r=0.36∼0.59) A. Through the stick r=0.59 t=6.2003 B. Knee dip r=0.55 t=5.5840 C. Half level r=0.52 t=5.1628 D. Double heel click r=0.51 t=5.0255 E. Wall pivot r=0.50 t=4.8849 F. Human ball r=0.48 t=4.6414 G. Full left turn r=0.39 t=3.5861 H. Crab bend r=0.37 t=3.2842 I. Grapevine r=0.36 t=3.2671 J. Side kick r=0.36 t=3.2671 2. for woman-10(r=0.45∼0.74) A. Horizontal to perpendicular r=0.74 t=8.3384 B. Single squat balance r=0.61 t=5.8627 C. Double heel click r=0.59 t=5.5651 D. Squat voult r=0.53 t=4.7599 E. Korean stand up r=0.53 t=4.7599 F. Tip up(Frog hand stand) r=0.50 t=4.3970 G. Bear dance(Russia dance) r=0.50 t=4.3970 H. Sit up r=0.49 t=4.1061 I. Stork stand r=0.46 t=3.9455 J. Wall pivot r=0.45 t=3.8376 3. Marking Two times each score is given when succesfully performed in first of three chances in test. Original score in the second or third performance. 0 score in failure. All score is 50 and each is(r×10). Following is each score for man and woman. for man; A=7, B.C=6, D.E.F=5, G.H.I.J=4 for woman; A=8, B.C=6, D.E=5, F.G.H.I.J=4 100score will be for man and woman all together.
하석호,김정묵,육종철 대한방사선 방어학회 1991 방사선방어학회지 Vol.16 No.2
외삽형 전리함을 사용하여 90Sr+90Y(1.65mCi) 베타선원에 대해 교정점 30cm 거리에서 조직표면의 흡수선량을 측정하였다. 이때 흡수선량 측정에 영향을 주는 유효단면적, 입사창 감쇠율, 극성효과, 이온 재결합율 등의 보정인자를 분석하였다. 이들 인자를 보정한 후의 조직표면의 흡수선량은 1.4939μGy/sec(±2.9%)로 평가되었다. Beta ray(90Sr+90Y) absorbed dose at tissue surface was measured from the distance of 30cm by use of extrapolation chamber. In the measurement, following factors were considered : effective area of collecting electrode, polarity effect, ion recombination and window attenuation. The measured absorbed dose rate at tissue surface was 1.4939μGy/sec with ±2.9%.