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A study on the behavior of Stainless steel Conductive thread in Induction heating system
임태규,손민영,이남규,최승용 한국공업화학회 2019 한국공업화학회 연구논문 초록집 Vol.2019 No.1
Induction heating properties of conductive thread which is made from stainless steel fiber have been studied. As a result, it was possible that conductive thread generates a heat by induction heating method when it makes a loop like closed circuit. Because it has a conductive property such as metal or carbon fiber, so when it is placed in the alternating magnetic field, electromotive force (emf) is induced to it so that joule heating by emf can be possible. Also, if it forms a closed loop, it was able to indicated a characteristic of uniform heating although a part of stainless steel thread loop placed on different position inside or outside of induction coil.
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임태규,이상복,노태성 한국항공우주학회 2013 한국항공우주학회 학술발표회 논문집 Vol.2013 No.11
본 연구에서는 임무속도와 고도를 만족하는 우주발사체 추진기관 최소 무게에 대한 근거를 제시하기 위해, 발사체의 성능해석과 최적화를 수행하는 프로그램을 개발하였다. 최적화 프로그램은 유전알고리즘을 사용하여 설계범위 내에서 최소의 발사체 무게를 찾도록 구성되었다. 설계변수는 발사체의 주요한 성능 파라미터인 연소실 압력, 노즐 확장비, 발사체 추력중량비로 결정하였다. 프로그램 실행 결과, 기존 발사체에 대비하여 약 4~15%의 발사체 중량감소를 확인하였으며, 연소기 형상, 터보펌프의 파워, 가스발생기 질유량 등의 최적 변수를 도출할 수 있었다. In this study, the analysis and optimization program of the propulsion system of the launch vehicle has been developed for suggestion of the basis of the minimum weight of the launch vehicle which satisfies the mission velocity and altitude. Using the genetic algorithm, the optimization program has been designed to find the minimum weight of the launch vehicle within ranges of design variables. Design variables were determined as chamber pressure, nozzle expansion ratio and launch vehicle thrust-to-weight ratio which are principal parameters of the launch vehicle. As the program execution results, 4~15% weight reductions of the launch vehicle has been estimated compared to the existing launch vehicles. It has been possible to obtain the optimal variables of thrust geometry, turbo-pump power, and gas-generator mass flow rate.
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세라믹 건조로 온도 제어를 위한 가중계수를 갖는 일반형 예측제어
임태규,성원준,금영탁,송창섭 한국결정성장학회 2003 韓國結晶成長學會誌 Vol.13 No.6
The electric furnace, inside which the desired temperature is kept by the generated heat, is known to be a difficult system to control and model exactly because system parameters and response delayed time are varied as the temperature and positions are changed. In this study, the GPCEW (generalized predictive control with exponential weight), which always guarantees the stability of the closed loop system and can be effectively applied to the internally unstable system, was introduced to the ceramic drying electric furnace and was verified by showing its temperature tracking performance experimentally. 내부에 열을 가하여 원하는 온도를 유지하는 전기로는, 정확하게 제어하고 모델링을 하기 힘든 시스템이다. 왜냐하면 시스템 변수와 응답 지연 시간이 온도와 위치가 변함에 따라 변하기 때문이다. 이번 연구에서 항상 폐루프 시스템에서 안정성을 보증하고, 내부가 불안정한 시스템에 효과적으로 적용될 수 있는 가중계수를 갖는 일반형 예측 제어가 세라믹 전기로에 적용되었고, 실험을 통해 온도 추적 이행을 보임으로서 확인하였다.
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임태규 충남대학교 법학연구소 2023 法學硏究 Vol.34 No.4
The child support order is a system that was first implemented in the 2009 revised Civil Law (Law No. 9650, effective August 9, 2009), and it has already been nearly 15 years since the preparation of the child support order became mandatory in divorce by agreement. Nonetheless, there are no special provisions regarding the effect of the child support order except Article 836-2, Paragraph 5 of the Civil Law, which states that Article 41 of the Family Litigation Law applies mutatis mutandis. Article 41 of the Family Litigation Law states that the child support order has enforcement power. I understand that since the child support burden order serves as the source of enforcement power, rapid execution procedures can be carried out based on this. But, can the child support order have other effects such as res judicata? If the child support order recognizes the same res judicata as a final judgment, then the grounds for objection suit against execution are bound to be limited to reasons that occurred after the preparation of the child support order, and substantive defect such as invalidity or reasons for cancellation that existed in the process of preparing the child support order. It should be interpreted that defects can only be disputed through quasi-retrial. Starting from these questions, this paper is an attempt to legally resolve and approach the issues addressed in the recent trial case. Although the case did not reach a judgment and was concluded with the confirmation of the decision to recommend reconciliation, there is a possibility that similar disputes will arise again in the future. Therefore, through this study, the effectiveness of the child support order protocol to prevent the possibility of such disputes in advance will be investigated. Legislative proposals were made along with a clear interpretation. The conclusion reached through the study is that the child support order has no effect equivalent to a judgment except enforcement power. Therefore, when a dispute arises regarding the child support order, it can be disputed through a objection suit against execution. Furthermore, since the child support order is not subject to the limitations of the temporal scope of res judicata, all defects before and after the preparation of the child support order are subject to a objection suit against execution
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임태규,김용현 한국농업기계학회 2014 바이오시스템공학 Vol.39 No.4
Purpose: This study was conducted to analyze the air flow characteristics in a plant factory with different inlet and outletlocations using computational fluid dynamics (CFD). Methods: In this study, the flow was assumed to be a steady-state,incompressible, and three-dimensional turbulent flow. A realizable k-ε turbulent model was applied to show morereasonable results than the standard model. A CFD software was used to perform the numerical simulation. For validation ofthe simulation model, a prototype plant factory (5,900 mmⅹ2,800 mmⅹ2,400 mm) was constructed with two inlets (Φ250mm) and one outlet (710 mmⅹ290 mm), located on the top side wall. For the simulation model, the average air currentspeed at the inlet was 5.11 m·s-1. Five cases were simulated to predict the airflow pattern in the plant factory with differentinlet and outlet locations. Results: The root mean square error of measured and simulated air current speeds was 13%. Theerror was attributed to the assumptions applied to mathematical modelling and to the magnitude of the air current speedmeasured at the inlet. However, the measured and predicted airflow distributions of the plant factory exhibited similarpatterns. When the inlets were located at the center of the side wall, the average air current speed in the plant factory wasincreased but the spatial uniformity was lowered. In contrast, if the inlets were located on the ceiling, the average air currentspeed was lowered but the uniformity was improved. Conclusions: Based on the results of this study, it was concluded thatthe airflow pattern in the plant factory with multilayer cultivation shelves was greatly affected by the locations of the inletand the outlet.
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