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한영민,고영성,양수석,이대성,Han, Yeoung-Min,Ko, Young-Sung,Yang, Soo-Seok,Lee, Dae-Sung 대한기계학회 2002 大韓機械學會論文集B Vol.26 No.8
In this paper, the test results of the combustion for 2 IAFR lean fuel models are described. The need for the low emission combustor has been issued from the concern on the increase of green house and the destruction of ozone layer. To evaluate the flow and combustion performance of newly designed 21AFR lean modules, the hydraulic tests in stereolithographic airflows models, the low pressure combustion tests in three injectors model for weak extinction and ignition and the high pressure combustion tests in single sector for NOx, SAE and efficiency are performed. The low pressure tests reveal that the governing parameters in weak extinction and ignition at atmospheric condition are prefilmer length, swirl flow rotation direction, secondary swirl angle and flow split. As a result of combustion test at high pressure, the efficiency and smoke level are satisfied with performance targets, but EINOx of 17.8 is higher than target value of 13.1 The high pressure tests show that the main parameters influenced on NOx are primary swirl angle, swirl flow rotation direction, heatshield exit angle and liner mixing hole location.
추출된 이종 크롬 친화성 세포의 이식에 의한 마우스에서의 통증 완화 효과
한영민,이종필,황형식,송준호,박상구,박석주,진재광,최은경,김용선,안명수,Han, Young-Min,Lee, Jong-Phil,Hwang, Hyung-Sik,Song, Joon-Ho,Park, Sang-Koo,Park, Suk-Ju,Jin, Jae-Kwang,Choi, Eun-Kyoung,Kim, Yong-Sun,Ahn, Myung-Soo 대한신경외과학회 2001 Journal of Korean neurosurgical society Vol.30 No.4
Objective : Adrenal medullary chromaffin cells are known to release analgesic substances such as opioides and catecholamines. Transplantation of them is a novel method that challenges current approaches in treating chronic pain. The transplantation of xenogeneic chromaffin cells into the central nervous system(CNS) supply antinociception in animals. In this study, we investigated the analgesic effects of rat adrenal medullary chromaffin cells transplanted into the CNS of the mouse. To study the antinociceptive efficacy of transplanted chromaffin cells, the survival of rat adrenal medullary chromaffin cells transplanted into the CNS of mouse was determined. Methods : The adrenal medullary chromaffin cells isolated from rat were transplanted into the striatum of mouse. These cells were confirmed of the release of Met-enkephalin and Leu-enkephalin by HPLC, and immunoblots for tyrosine hydroxylase(TH). Two weeks after transplantation, we performed immunohistochemistry for TH to determine the survival of implanted cells and assessed pain sensitivity at the same time. Results : The isolated rat adrenal medullary chromaffin cells were positive for anti-TH antibody and released Met-enkephalin and Leu-enkephalin more than rat endothelial cells. Transplanted rat chromaffin cells were stained with anti-TH antibody in striatum of mouse after 2 weeks. Pain sensitivity was reduced on the chromaffin cell-transplanted mouse compared to endothelial cell-transplanted mouse by the hot plate test. Conclusion : These results suggest that the rat chromaffin cells were suitably transplanted into the CNS of mouse. This approach could be used as a therapy for reducing of chronic pain induced by cancer or neuronal injury.
한영민,안명수,Han, Young-Min,Ahn, Myung-Soo The Korean Neurosurgical Society 2001 Journal of Korean neurosurgical society Vol.30 No.6
척추 경막상 지방종증은 과도하게 비대되고 증가된 경막상 지방조직이 신경조직을 압박하여 신경학적 증상을 유발하는 비교적 드문 질환이며, 주로 장기간 투여한 스테로이드와 관련되어 보고되었다. 특발성 척추 경막상 지방종증은 이러한 스테로이드 사용과 상관없이 발생하는 질환으로, 주로 비만 환자에서 발생하는 매우 드문 질환이다. 저자들은 스테로이드 사용과 관련없이 발생한 척추 경막상 지방종증 환자 2례를 치험하여 문헌 고찰과 함께 보고하는 바이다. Spinal epidural lipomatosis, which causes symptomatic compression of neural elements, is a relatively uncommon disease. Although it has been reported frequently in association with the administration of exogenous steroids, a few cases of epidural lipomatosis with no association to exogenous steroids, have been reported. Idiopathic spinal epidural lipomatosis may be a separate disease from that induced by steroid. Here, the authors present two cases of symptomatic epidural lipomatosis with no history of steroid-dependent diseases and review the relevant literature.
한영민,이종필,황형식,임대철,송준호,안명수,Han, Young-Min,Lee, Jong-Phil,Hwang, Hyung-Sik,Lim, Dae-Chul,Song, Joon-Ho,Ahn, Myung-Su The Korean Neurosurgical Society 2001 Journal of Korean neurosurgical society Vol.30 No.3
경막정맥동 혈전증은 다양한 원인을 가진 비교적 드문 질환으로 알려져왔으며 임상양상 및 발현형태가 매우 다양하여 임상적 진단이 쉽지 않았다. 그러나 최근에는 여러 영상진단 방법, 특히 자기공명영상 혈관 촬영등을 통해 조기 진단이 가능하게되었다. 치료 방법을 결정할 때, 환자의 임상증상과 정맥순환계의 개인간 차이가 매우 중요한 인자중 하나이다. 저자들은 보존적 치료로 좋은 결과를 얻은 2례의 경막정맥동 환자의 특성을 문헌고찰과 함께 보고하는 바이다. Cerebral dural sinus thrombosis(CDST) has been described as a rare disease with a variety of patho-etiological factors. The diagnosis of CDST is difficult due to various symptoms and signs, none of which is specific to CDST. But timely diagosis is critical for effective management. The introduction and widespread use of computed tomography(CT), magnetic resonance imaging(MRI) and cerebral angiography made early diagnosis of CDST possible. In particular, MR venography is the most useful tool for establishing a correct diagnosis quickly. In early literature, mortality ranked between 30% and 50% but in more recent series it is between 5.5% and 30%. With the advent of diagnostic and therapeutic tools, early diagnosis and proper management has made the prognosis better. The appropriate therapy for CDST, however, has been the subject of much cortroversy. Individual variations of the venous system and collateral vessels are key factors to decide the proper treatment. In this report, we present two cases with symptomatic CDST treated without open surgical or direct endovascular interventions with good outcome.
변형세포와 비변형세포에서 이온형과 Transferrin 결합형 Fe - 59 와 Ga - 67섭취율의 비교
손명희(Myung Hee Sohn),최기철(Ki Chul Choi),이영환(Young Hwan Lee),이상용(Sang Yong Lee),정경호(Gyung Ho Chung),한영민(Young Min Han),김종수(Jong Soo Kim),임창열(Chang Yeol Yim) 대한핵의학회 1996 핵의학 분자영상 Vol.30 No.1
N/A Pathways both mediated by and independent of transferrin(Tf) and the TfR have been described for the accumulation of iron. Although it is not clear whether the same systems take up iron and gallium, these pathways may suggest the contention that uptake of Ga-67 can, in fact, occur by both Tf-independent and Tf-dependent systems and may share with Fe-59 in part the same mechanism for uptake. The predominant system by which uptake of both radiometals occurs may be different in the degree of the transformation af tumor. Transformed(MMSV/3T3) and untransformed(BALB/3T3) cells were incubated with luM of Ga-67-citrate of Fe-59-chloride for 15 min. at 37℃ in either the presence or absence of Tf. After then, the monolayers were washed with HBSS or PBS, and the cells were solubilized in 1% SDS for gamma well counting and protein determinations. There were similarities, as well as differences, in the pattern of uptake of Fe-59 and Ga-67 presented both in ionic from and as bound to Tf. Both radiometals appeared gain to cells in either ionic or Tf-bound forms. Transformed cells appeared to accumulate more radiometal, either Ga-67 or Fe-59 in the presence of Tf than do the their untransforemd counterparts. Conversly the presentation of either radiometal in ionic form resulted in significantly greater accumulation of metal by the untransformed cells than those transformed. The efficiency for uptake of Ga-67 or Fe-59 in the absence of Tf was greater than for uptake of the Ga-Tf or Fe-Tf. However, the magnitude of difference in efficiency of uptake was greater for Fe-59(10-fold) than for Ga-67 (3-fold). Our results Supports the theory that both Tf-independent and Tf-dependent systems for the uptake of Ga-67 both systems operate oppositely between transformed cells and those untransformed, with uptake by the predominating in transformed cells by the Tf-mediated system and in untransformed cells by the Tf-independent. The uptake of Ga-67 by tumor may share with Fe-59 in part the same mechanism.
외부 열적 환경 변화에 따른 압전작동기 제어성능 열화 고찰
한영민(Young-Min Han),문병구(Byung Koo Moon),최승복(Seung-Bok Choi) 한국소음진동공학회 2015 한국소음진동공학회 학술대회논문집 Vol.2015 No.10
This paper proposes experimental results for control performance deterioration of a piezoelectric actuator under high temperature conditions due to external heat environment. In this work, a heat environment from 30°C to 190°C is established by a heat chamber which is capable of high temperature of heat environment. Inside the heat chamber, an experimental apparatus consisting of the stack type of piezoelectric actuator, laser sensor, gap sensor and temperature sensor is established. After evaluating temperature dependent blocking force, displacement and time response of a piezoelectric actuator inside the heat chamber, tracking control performances are evaluated under various temperature conditions via proportional-integral-derivative (PID) feedback controller. The desired position trajectory has a sinusoidal wave form with a fixed frequency. Control performances are experimentally evaluated at both room temperature and high temperature and presented in time domain.
증예(症例) : 좌 상행대정맥이 없는 우 상행대정맥의 결손
한영민 ( Young Min Han ),황의일 ( Eui Il Hwang ),진공용 ( Kong Yong Jin ) 전북대학교 의과학연구소 2001 全北醫大論文集 Vol.25 No.2
Absence of the right superior vena cava is a rare vascular anomaly. It is associated with a persistent left superior vena cava. We report a case of absence of right superior vena cava and zygous continuation without left superior vena cava features on CT scans.