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Al 7075합금의 열간단조와 반응고 단조에 있어서 조직, 성형성 및 경도 특성 비교
이상용,전재일,이정환,이영선,신평우,Lee, Sang-Yong,Jeon, Jae-Il,Lee, Jeong-Hwan,Lee, Yeong-Seon,Sin, Pyeong-U 한국소성가공학회 1998 소성가공 : 한국소성가공학회지 Vol.7 No.6
Conventional hot forging and thixoforging of Al 7075 alloy have been compared with respect to microstructures, formability and hardness. Two distinctive temperature-strain rate ranges for hot forging of Al 7075 alloy were observed from the results of simple compression tests with strain rates of 10-3∼101 sec-1 in the temperatures between $250^{\circ}C$ and $500^{\circ}C.$ In the dynamic recovery range (low temperature-high strain rate range) multi-stage forging was necessary to form a complex shape part due to the lack of formability. In the high temperature-low strain rate range, in which dynamic recrystallization takes place a complex shaped park could be formed by single-stage forging. About 50% cold working in the SIMA process was necessary to get a fine and homogeneous microstructures. Microstructural study suggest that thixoforged Al 7075 part has fine grains and homogeneous microstructures. Its hardness number is almost same to that of conventional hot forged part after aging treatment.
Moire' 영상무늬를 통한 근골격계질환의 진단과 현가장치를 이용한 치료방안
이상용,이은경,권소희,정혜경,김삼태,정명수,이기남,Lee Sang-Yong,Lee Eun-Kyong,Kwon So-Hee,Jung He-Kyong,Kim Sam-Tae,Chong Myong-Soo,Lee Ki-Nam 대한예방한의학회 2003 대한예방한의학회지 Vol.7 No.2
The Musculoskeletal Disease has been ignored or turned away due to the difficulty of diagnosis and the vagueness of judgement up to now. Contrary to other diseases, there were many cases where the character of the Musculoskeletal Disease wasn't revealed through the objective inspection. And that's because the Musculoskeletal Disease appears for the most part due to muscular defect so it is impossible to diagnose the muscle by X-ray diagnosing the bone and it is also impossible to diagnose the fine damage of the muscle or tendon even by advanced device like MRI. As the nervous blood vessels or acupunctures pass through or are next to the muscle, the tension of the muscle put pressure on these so can become the direct or indirect causes of various kinds of pains or intern diseases. But in spite of that, for lack of proper equipment diagnosing the state of the muscle(Shortened.. Relaxed... or Hardened...) the muscle has been disregarded or neglected intentionally or unintentionally. While many people think themselves to be a muscular expert, if they don't see the shape of the muscle, that is just like blind treatment. But as now the equipment diagnosing the state of the muscle is developed, it seems that this problem can be settled. It was attempted in this study that the muscle or skeleton of the Musculoskeletal disease patients was diagno the treatment order and method were decided by a questionnaire survey and simple inspection, and the Musculoskeletal correction exercise using the muscle management and sling system made them escape from the Musculoskeletal disease, turning their muscle into more flexible and stronger muscle. As a result notwithstanding the limited treatment period '12 times', the improvement rate was as high as 74%, which showed that the muscle management and Musculoskeletal correction exercise had a great effect on the symptom improvement of the patients. If the treatment times had increased, the improvement rate also would have increased more.
원형 미소 채널 내 드라이 플러그류의 유동 영역 한계와 압력 강하에 관한 실험적 연구
이치영(Chi Young Lee),이상용(Sang Yong Lee) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.11
In the present experimental study, the regime limit and pressure drop of dry-plug flow (dry wall condition at the gas portions of plug flow) in round mini-channels has been investigated. The air-water mixture was flowed through the round mini-channels made of Teflon, where the tube diameters ranged from 1.26 to 2.06 ㎜. For the present experimental range, with decreasing of the tube diameter, the transition between the plug and slug flows (wet and dry) happened at the higher gas superficial velocity region, which were in good agreement with the previous flow pattern maps tested. On the other hand, the transition between the wet- and dry-plug flows was little affected by the change of the tube diameter. In the pressure drop of dry-plug flows, among the correlations tested, the Lee and Lee’s (2008) correlation best fitted the measured pressure drop data within the mean deviation of 10 % for the present experimental range.
출생 전 생명에 대한 형사법적 고찰 - 착상과 출생의 전후에 따른 형법적 보호의 차이 -
이상용,Lee, Sang-Yong 대한의료법학회 2009 의료법학 Vol.10 No.1
Generally, criminal law protect the human life after he/she has born. Before the birth, the life of fetus are protected by prohibition of abortion, not of murder. Also, the fetus is not considered as an object of infliction of injury. A popular opinion and case law say that the fetus becomes a person at the point of an outset labor pains. Recently, some theories allege that traditional opinions is not sufficient in the case of induced delivery, so it should be decided by norm, not by a simple fact, whether a unborn child is a fetus or a person, and that the fetus should be considered as an object of infliction of injury. These theories can be meaningful because these could protect human life more comprehensively. In the other side, however, these could harm the legal stability and bring the excessive punishment. Abortion of negligence is not punishable in criminal law, and there is little possibility of the fetus injury without the injury of the pregnant woman. And the Contergan Case, if it happened again, must be dealt with as crime about environment or public health more severely. These new approaches are in conflict with the principle of "nulla poena sine lege" and other fundamental rules of the criminal law, and should lead to the excessive punishment and criminal provisions. Accordingly, the decision of Supreme Court of Korea about the beginning point of human being should be maintained.
이상용,김태진,허승,최청일,Lee, Sang-Yong,Kim, Tae-Jin,Heo, Seung,Choi, Chung-Il 한국생태학회 2001 Journal of Ecology and Environment Vol.24 No.3
한국산 거머리말속(Zostera, Zosteraceae) 중 포기거머리말(Zostera caespitosa Miki)의 생태 및 분류학적 특성을 파악하기 위하여 생육 환경과 형태적인 특징을 분석하였다. 한반도에 자생하는 포기거머리말읜 생물지리학적인 분포는 동해연안의 덕산항과 대변, 황해 연안의 백령도 두무진과 남해 연안의 진해에서 종의 실체가 확인되었다. 포기거머리말의 생육지는 만과 항구로 수심 2.5∼5.2 m의 사질과 사니질의 퇴적환경에서 생육하였다. 본 종은 같은 생육지에 생육하는 거머리말 군집보다 깊은 수심에서 군집을 형성하였다. 외부 형태적인 특징은 황해 연안의 개체가 동해 연안의 개체보다 크게 신장하였으며, 생식지가 출현한 시기 의 수온은 6.0∼13.7℃로 1월부터 4월초까지 개화하였다. 포기거머리말의 생육지의 수심, 퇴적물의 평균입도와 유기물함량은 개체의 형태적인 형질 변이에 영향을 미치는 것으로 나타났다. Zostera caespitosa Miki has been identified to be distributed along the seacoasts of Korea and Japan. This study was intended to clarify the morphological characters and the habitat characteristics of Korean Z. caespitosa. It was confirmed that Z. caespitosa is distributed along the seacoasts of South, Yellow and East Seas of South Korea. The habitats were located in the bay and port with the depth varying from 2.5 to 5.2 m. The habitats of Z. caespitosa were rather deeper than that of mixed bed with Z. marina. The sediment in the habitats was composed of well-sorted fine sand or muddy sand. Z. caespitosa showed marked differences in several morphological characters among sites. Morphology of Z. caespitosa varied with water depths, grain size and organic contents of sediments. Flowering shoots occurred by water temperature of 6.0∼13.7℃ from January to early April.
각종 과실류가 (果實類) 백서 (白鼠) 위궤양 (胃潰瘍) 형성에 미치는 경향
이상용,고대진,김종숙 ( Sang Yong Lee,Dae Jin Ko,Chong Sook Kim ) 대한소화기학회 1979 대한소화기학회지 Vol.11 No.1
The present study was undertaken to investigate the ulcerogenic eKect of various fruits in rats. Various fruits incluciing peach, apple, apricot, plum and tomato were administerecl to Sha; rat. \Ve observed gastric v.lcerations ancl deterniinecl the gastric acidity, total protein, rnncoprotein and pepsin concentration of gastric juice Z4 hours after aclrninistration. I'he following results ivere obtained. The ulcer inciex. And volume of gastric group. Juice in friiit groups ivere higher than control The total and free acidity of gastric juice in frit groiips showed Jow valiies in comparision ivith control group. 3. The total protein and nnicoprotein of gastric juice in fruit groups were lower than contro} groups. 4. The pepsin activity of gastric juice in fruit grov.p were also lower than control group.