• 한국정밀공학회지
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• 제19권11호
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• pp.167-173
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• 2002

The look up table method conventionally applied to control the inner temperature and humidity of a laver drying machine has repeatedly occurred not only laver's damage but also inferior goods since the reaching time at the optimum state takes a long time. In this paper, a fuzzy control theory instead of the look up table was proposed to reduce the reaching time at the optimum state. The proposed method used six input variables and four output variables for the fuzzy control, and a triangle rule for a fuzzifier, The Mandani's min-max method was applied to a fuzzy inference. Also, the mean method of maximum was applied to a defuzzifier. The method applied to the fuzzy controller contributed to reduce the reaching time at the optimum state, and to minimize not only laver's damage but also inferior goods.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 1993년도 추계학술대회 논문집
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• pp.212-217
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• 1993

A 2-dimensional FEM/GEM program was developed for analyzing forming processes of an arbitrarily shaped draw-die, in which plane strain condition is assumed and linear line elements are employed. FEM formulation adopted a new algorithm for solving force equilibrium as well as non-penetration condition simultaneously. For the case of numerical divergence at nearly final forming stages and the initial guess in Newton-Raphson iterations, geometric force equilibrium method(GEM) is also introduced. The developed program was tested with the simulation of stamping processes of automotive bonnet inner pannel in order to verify the usefulness and validity of FEM/GEM formulation.

• 한국공작기계학회:학술대회논문집
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• 한국공작기계학회 2001년도 추계학술대회(한국공작기계학회)
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• pp.387-392
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• 2001

Fused deposition(FD) modeling by Stratasys Inc., is one of the material deposition subfamilies of solid freeform fabrication(SFF) technologies. In this process, build material in the form of a flexible filament, is heated to a semi-liquid state and extruded from a robotically controlled deposition head onto a fixtureless table in a temperature controlled environment. The position of nozzle is computer controlled relative to the base, which allows geometric complex models to be made to precise dimensions. FDM provide what the part was directly tested by the worker. It provide believable data. This study is experiment on surface roughness of part at FDM

• 한국정밀공학회지
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• 제15권4호
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• pp.44-50
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• 1998

The creep life fraction can be evaluated by the degree of grain deformation since the grain of Cr-Mo base metal deforms in the direction of stress. The grain deformation method using image processing technique is developed for life assessment of in-service high-temperature components. The new assessment model of grain deformation method is presented to apply to in-service components and is verified by interrupted creep test for ex-serviced material of 1Cr-0.5Mo steel. The proposed model, which is irrespective of stress direction, is to evaluate mean of the absolute deviation for the measured ratios which are diametrical maximum to minimum dimensions for grains.

• 한국세라믹학회지
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• 제36권6호
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• pp.662-670
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• 1999

Porous alumina was fabricated from pressureless powder packing forming method using powders granulated by spray drying. It was investigated the pore size distribution of fabricated porous alumina. The results of microstructural observation showed that intraganular pore size and intragranular pore size. At 1700$^{\circ}C$ there were no intragranular pores but it showed homogeneous distribution of intergranular pore size. The bending strength and shrinkage increased as porosity decreased. In case of thermal shock resistance sudden decrease of bending strength to $\Delta$T was not shown because intergranular large pore prevented sudden crack propagation.

• 한국전산유체공학회지
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• 제6권3호
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• pp.19-26
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• 2001

An Eulerian-Lagrangian method, so called immersed boundary method, is used for analysing viscous flow around arbitrary bodies, where governing equations are discretized on a regular grid by using a finite volume method. To improve the accuracy of flow near body boundaries, a second-order accurate interpolation scheme is used and a level-set based grid deformation method is presented to construct the adaptive grids around body boundaries. The present scheme is used to simulate steady flow around a semicircular cylinder mounted on the bottom of flow domain and calculated results are validated by results of a body fitted grid method. Finally, present method is applied to a complex flow around multi body and the usefulness is checked by investigating calculated results.

• 해양환경안전학회지
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• 제8권2호
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• pp.17-22
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• 2002

Die vorliegende Arbeit handelt sich uber die Risikogesellschaft und das symbolische Strafrecht. Die Risikogesellschaft bedeutet die Ggesellschaft mit kunstlich erzeugten atomaren, chemischen, okologischen und gentechnischen Selbstvernichtungsmoglichkeit. Die Risikogesellschaft hat offenbar dort, wo sie die Gefahren nicht leugnen kann, Bedurfnis nach Minimierung von Unsicherheit, Dieses Be-durfnis wirkt sich einmal aus in der Neigung, das Entstehen bestimmter nicht konsentierter Gefahren schon in einem sehr fruhen Stadium der Entwicklung mit Hilfe des Strafrechts zu stoppen. Vorverlagerung der Gefahrabwehr bedeutet im Fall des Strafrechts die Vorfeldkriminalisierung. Hierfur scheint es zwei wichtige Methoden zu geben: die Formulierung weit vorgelagerter Rechsguter und die Konstruktion vorfelderfassender Deliktstypen. Aber in die modeme Risikogesellschaft handelt sich das Strafrecht mit dem Versuch der Vorfeldkriminalisierung unubersehbare Vollzugsdefizite ein. Neben Ermittlungsschwierigkeiten sind hierfur strukturelle Zurechnungsprobleme und evidente Kontra-produktivitat verantwortlich. Es scheint dennoch einen naheliegenden Ausweg zu geben. Wo das Strafrecht in seiner instrumentellen Wirkung versage, wo ein unvermeidbares Vollzugsdefizite vorliege, komme dem Strafrecht doch eine gewichtige symbolische Bedeutung zu. Aber ein Strafrecht, das sich als Mittel zur Losung von System-problemen versteht, wirkt instrumentell zu wenig, um seine Kontraproduktivitat auszugleichen. Eben darunter leidet dann aber auch seine symbolische Wirkung, die man sich zunachst noch eine Zeitlang von ihm erhoffen mag.

• 한국콘텐츠학회:학술대회논문집
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• 한국콘텐츠학회 2014년도 추계 종합학술대회 논문집
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• pp.239-240
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• 2014

2014년 9월 29일부터 아동학대 가해자에게 무기징역까지 처벌을 강화하고, 친권 제한도 가능케 한 '아동학대범죄의 처벌 등에 관한 특례법(아동학대처벌법)'이 시행되고 있다. 동법의 내용으로는 기존 형법상 '3년 이상의 유기징역'에 집행유예가 가능한 학대치사죄에 대해 법정형을 '무기 또는 5년 이상의 징역'으로 높이고 별도의 감경사유가 없는 한 집행유예가 불가능하도록 했다. 아동학대 가해자가 친권자라는 이유로 피해아동을 격리시키기 힘들었던 점을 개선하기 위해 친권을 제한할 수 있는 길을 터놓았다. 부모(친권자)가 중상해를 입히거나 상습적으로 학대한 경우엔 검사가 법원에 친권상실을 청구해야 하며, 검사가 하지 않으면 아동보호전문기관의 장이 청구를 요청할 수 있도록 했다. 본고에서는 아동학대의 실태를 기초로 하여, 아동학대처벌법의 내용과 문제점을 살펴보기로 한다.

• 대한기계학회논문집
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• 제10권5호
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• pp.653-660
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• 1986

본 논문에서는 단일 노치가 있는 봉의 소성굽힘, 밀폐형단조, 4각형블록의 압 축, 2차원 절삭가공 및 평면변형 후방추출 등 평면변형 성형문제에 대해서 공구와 소 재사이에 일정한 마찰응역이 작용한다는 가정하에 운동학적 가용속도장으로 구한 상 계해와 동일한 변형모델을 사용하여 힘평형법으로 구한 상계해를 비교.검토하여 2가지 접근법으로 구한 상계해가 동일함을 입증하였다.

• 한국원자력학회:학술대회논문집
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• 한국원자력학회 1997년도 추계학술발표회논문집(1)
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• pp.25-31
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• 1997

현대적 노달방법은 다차원 중성자 확산방정식을 풀기 쉽고 계산시간을 단축시킬 수 있도록 각 방향에 대하여 횡방향으로 적분하여 등가인 차원 수 만큼의 1차원 중성자 확산 방정식을 만들어 풀고 있다 이 과정에서 횡방향 누출 중성자 적분항을 적절히 근사해야함이 필수적인데 이로 인하여 계산의 정확도를 손상하게 될 수가 있다. 이러한 횡방향 누출 중성자 근사를 제거하여 계산의 정확도를 향상시킨 것이 노달 해석함수 전개법(Analytic Function Expansion Nodal Method)이다. 그러나 이 방법은 기존의 노달 방법 보다는 계산시간이 다소 많이 소요되는 단점이 있었다. 본 논문에서는 소격격자 재균형 가속법(Coarse-Mesh Rebalance Acceleration Method)을 노달 해석함수 전개법에 적용하면 계산의 정확도는 그대로 유지되면서도 속도는 크게 향상시킬 수 있음을 보여 준다.