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Sang‑Wook Kim,Hyeon‑Woo Son,Taek‑Kyun Jung,Young‑Bum Chun,Yi‑Hyun Park,Ji‑Woon Lee,Soong‑Keun Hyun 대한금속·재료학회 2019 METALS AND MATERIALS International Vol.25 No.4
The hot deformation behavior of advanced reduced-activation alloy (ARAA) was investigated using hot torsion tests. Thefl ow stress decreased as deformation temperature increased and as strain rate decreased. The fl ow behavior demonstratedthe typical dynamic recrystallization (DRX). Based on the constitutive analysis of peak stress, the activation energy for hotdeformation was found to be 330.3 kJ mol −1 . Peak stress was analyzed as a function of the Zener–Hollomon parameter, andcalculated and experimental values were in good agreement. A DRX kinetic model for ARAA was derived with deformationconditions based on the Avrami-type model. It was confi rmed that the volume fraction of dynamically recrystallized grainsincreased as deformation temperature increased and as strain rate decreased. The necklace structure and grain boundarybulging were observed in the deformed microstructure of ARAA. The suggested DRX mechanism for ARAA during hotworking is discontinuous DRX.
吸入 空氣의 濕度가 Diesel cycle의 性能에 미치는 影響에 關한 理論的 考察
장성운 忠州大學校 2007 한국교통대학교 논문집 Vol.42 No.-
For calculating theoretical thermal efficiency of Diesel cycle in internal combustion engine, Theoretical thermal efficiency is decided by compression ratio. Compression ratio of internal combustion engine is calculated by stroke volume and clearance volume. The air of stroke volume is constant to the engine mechanism. Air temperature of clearance volume increases adiabatic compression. The moisture in intake air is evaporating by the temperature of adiabatic compression. Moisture evaporating is increased volume in the clearance volume after adiabatic compression. Clearance volume is the intake air and the steam of moisture evaporating. The result, compression rate is increased and thermal efficiency is changed. For calculating, Absolute humidity of intake air increase 0, 5, 10, 15, 20, 25, 30.% The result were as follows. 1, Increase the absolute humidity of intake air in Diesel cycle, moisture is changed to super heated steam by evaporating and increased the volume in the clearance volume and changed compressing rate after adiabatic compression. 2, Pressure increase after adiabatic compression improves the power of engine. 3, The high compressing rate increases thermal efficiency in Diesel cycle. 4, If the moisture increasing mechanism is applied to the intake air, engine power and thermal efficiency is increased and engine is effected a little big size.
장성운 忠州大學校 2009 한국교통대학교 논문집 Vol.44 No.-
All the world war of the energy. Energy is the resources of national. All the national try to secure of energy. Fossil fuels is drained gradually in the world. But, the world population use energy for comfortable life. The style of energy use is heating, electric generation, vehicle etc. The theoretical efficiency of heat engine is about 45%, and actual efficiency is about 26%. The energy loss of 55% give off to the air and the rest is mechanical energy loss. The heat energy give off to the air is the chief criminal of earth warm. In the steam power plant, The heat energy give off to the air is using for heating warm water. Warm water is supply to home. But heat engine of car, The heat energy give off to the air can not use. The reason, heat engine of car is moving In this study, For electric generating use thermo-electric element. Thermo-electric element is generating the electric from the heat energy give off to the air in car engine. The results are as follows. 1. using thermo-electric element, electric generating is possible from the heat energy give off to the air in car engine exhaust gas. 2. In the experimental equipment, A piece of thermo-electric element is generating of electric 0.2W-3.2W to the temperature range 50℃-290℃. 3. 200 pieces thermo-electric element can apply to the car exhaust gas muffler and can generating of electric 160W-300W. 4. Recharge the generating electric to the battery of car, The generator power of car is decrease about 1/3 and increase car engine power.
패키지디자인에 나타난 B.I차별화 전략연구 : 샴푸 개발사례를 중심으로
정운성 한국패키지디자인학회 2002 상품문화디자인학연구 Vol.11 No.-
Shampoo is one of important products to remove pollutants existing on hair and skin in our body, to maintain them sanitary, to make ourselves up. it has been classified such as perfume, 2in1, mild, treatm ent, and dandruff prevention according to consumer is trend varieties, out of the meaning just to cleanse They also have been changing about the kind of cosmetic Personal Care products that personal inclination leads. The transition for the needs by changing consumers propensity to consume is the natural result followed by the improvement of consumers income, education, and culture level. The domestic shampoo market is expected to grow, as it entered its maturity level in the 1990s as a turning point, to expand in quality rather than in quantity With the growth of highprice market from 1998, 20 is female consumers increase is leading global brand such as P&G and Unilever to grow up, meanwhile, domestic brands such as LG Household & Health Care, Pacific, and Aeakyung to get weakened in terms of competitiveness. This article is to suggest that the proper measurement among several to have strong brand competition is to strengthen the differentiation strategy of Brand Identity in terms of package design. The effective differentiation strategy of B.I means a systematic schematization in the business strategy level. B.I for local consumers and the realities of B.I application by domestic local brands that being traded in the domestic area is far beyond to the This article analyzes the existing state of B.I differentiations of products, which compete. This article analyzes the existing state of B.I differentiations of products, which competeaddition, this is to survey what has more competition and distinction base on B.I differentiation, and to propose the direction with the hope of elevating the competition level of local brands further.
배양된 쥐 인슐린종 세포에서 성장인자들에 대한 인슐린 유전자의 발현
김성운,양인명,김진우,김영설,김광원,최영길 경희대학교 유전공학연구소 1989 遺傳工學論文集 Vol.1 No.-
인슐린 유전자 발현의 실험실적 모델로서 쥐 인슐린종 세포(RINm5F cell;rat insulinorraceil)를 이용하여 몇 개의 성장인자에 대한 반응을 조사하고 인슐린 유전자의 활성에 관여하는 상황을 이해하고자 인슐린 유전자의 mRNA를 조사하였다. RINm5F 세포는 glucose 와 EGF 등의 성장인자에 대해 세포분화 및 성장에 자극을 받으며 인슐린, IGF-Ⅰ IGF-Ⅱ등에는 영향을 받지 않았다. 따라서 RINm5F TPVHSMS 생체내 췌도 베타세포의 기능을 대변하기는 어려웠으나 각종 성장인자의 세포내 활성양상을 간접적으로 알 수 있었다. Insulin secretion of RINm5F cells can be stimulated by some of the growth factors, however, not in the same manner compared to pancreatic islet beta cells. We observed that insulin superfamily (insulin IGF-Ⅰ, IGF-Ⅱ) were not affected to insulin mRNA of RINm5F cells, but EGF (50ng/㎖) increased insulin mRNA levels, and dexamethasone (300ng/㎖) decreased insulin mRNA levels in RIAm5F cells. So some of growth factors regulated insulin gene at transcription level in RINm5F cells line.