http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
카테콜-O-메틸트랜스퍼아제 유전자(rs4680)와 섬유근육통 사이에 연관성: 최신 메타분석
천정현,반주연,이종헌 대한구강악안면병리학회 2022 대한구강악안면병리학회지 Vol.46 No.2
The association between the COMT rs4680 (G>A, Val-158-Met) polymorphism and the risk of fibromyalgia has been investigated in previous studies, but the results are controversial. Therefore, a meta-analysis has been performed to confirm the association between COMT rs4680 (G>A, Val-158-Met) polymorphism and the risk of fibromyalgia in this study. Our study includes eleven case-control studies with 2,909 individuals comprised of 1,365 fibromyalgia patients and 1,544 control subjects. The regression analysis was performed using the random effects model or the fixed effects model and OR with the corresponding 95 % CI was calculated for the allele, recessive, dominant, over-dominant, co-dominant 1, and co-dominant 2 model. No statistical significant associations were observed between COMT rs4680 (G>A, Val-158-Met) polymorphism and risk of fibromyalgia in allele model (P-value = 1.00), recessive model (P-value = 1.00), dominant model (P-value = 0.54), co-dominant 1 model (P-value = 1.00) and co-dominant 2 model (P-value = 1.00). In conclusion, our meta-analysis showed that the COMT rs4680(G>A, Val-158-Met) polymorphism might not be genetic risk factor for the fibromyalgia.
천정현,정재호,윤을식,이병일,박승하 대한수부외과학회 2018 대한수부외과학회지 Vol.23 No.4
The temporal branch of the facial nerve is particularly vulnerable to traumatic injuries due to its anatomic location, which often causes severe aesthetic and functional loss in the patient. Moreover, a chronic injury with nerve defect is more diffi-cult to treat compared to acute injury, because it usually needs an additional procedure such as a nerve graft surgical pro-cedure. This case shows a male patient who had a divided temporal branch of the facial nerve one month after an injury. We successfully grafted the split sural nerve and showed a good aesthetic, functional recovery for the patient.
역사주의관점으로 본 실내공간의 복고적 성향 변화에 관한 분석
천정현(Cheon, Jeong-Hyeon),정석연(Jung, Suk-Yon) 한국실내디자인학회 2019 한국실내디자인학회 학술대회논문집 Vol.21 No.1
This study analyzes the change of retroactive tendency of interior space from the viewpoint of historicalism. All our lives are accompanied by historical contexts, and we must consider socio-cultural aspects to understand them. Based on the overall historical context of design, it is assumed that retro design will also exist in the historical flow and that similar forms will occur repeatedly. In connection with the socio - cultural background of our country, we analyze the retroistic tendencies in interior space from 1970 to the present through case studies. As a result of research, the retro trend of interior design was not in the ephemeral trend but in the historical trend, It was found that the anxiety, lack, future instability, and self - expression need arising from the socio - cultural context lead to retro trends. Looking at the retro expression of the interior, the retro of the 80s and 90s and modern retro showed a little difference in ornamentality, sensuality, and mixture, but expressed the desire to return to the past as imitation, reconstruction, reinterpretation, We can see that there is a similarity in the emotional change through these spaces On the other hand, it is expected that the subtle differences according to the subjects who enjoy the social culture can create some differentiation in the design style. This study has significance as a basic data to grasp the change of modern retro design tendency.
역사주의관점으로 본 외식공간의 복고적 경향에 관한 연구 - 1970년대와 2010년대를 중심으로 -
천정현(Cheon, Jeong-Hyeon),정석연(Jung, Suk-Yon) 한국실내디자인학회 2020 한국실내디자인학회논문집 Vol.29 No.2
The purpose of this study is to analyze the eating out space where the trend of retrofit is displayed from the viewpoint of historicalism, it is to provide the basic data of retro design for the dining room in Korea by revealing the basics of the retro trend of interior design. The historical scope of th study is limited to the 1970s and 2010s. The method of study was literature research, categorized interior design elements and retro types. Dining spaces in the 1970s conducted a literature survey and Dining spaces in the 2010s conducted field surveys, such as indoor observation and photography. Afterwards, the results were derived through case analysis of eating spaces by period. The results of the study, it was found that the retro tendency of eating out space presents a common expression by citing past styles, and changes in retro expressions are made in accordance with social and cultural trends and demands. First, the retro trend of eating out spaces is a phenomenon that appears repeatedly in relation to social and cultural phenomena. Second, in the dining room, the retro expression of the interior design elements tended to quote Western classical style and Korean elements. Third, in quoting the past styles, the retro-type of eating space tends to change the shape and material of the structure, the shape of the original furniture elements, or to change the shape of the original form and to convert of the existing functions. In the 1970s, the retro trend of dining out space was somewhat indiscriminate in the past, focusing on the structure, and limited in the formative reproduction. On the other hand, the retro trend of the 2010s has empirical characteristics compared to the 1970s, and the expression of interior design improves the quality of interior design through variation rather than simple imitation and reproduction. It is also moving in a positive direction to strengthen awareness of time and history through the continuous structure and materials.
혈전성 혈소판 감소성 자반증의 임상상을 보인 항사구체 기저막 항체질환 1 예
천정현(Jeong Hyun Chun),서상렬(Sang Yeol Suh),조상경(Sang Kyung Jo),김형규(Hyoung Kyu Kim),조원용(Won Yonpg Cho) 대한신장학회 2001 Kidney Research and Clinical Practice Vol.20 No.2
Thrombotic thrombocytopenic purpura(TTP) was first described in 1925, however, the definite cause of TTP remained unknown. Further study revealed that the pathogenesis of thrombotic thrombocytopenia was related to autoimmune disease. Autoantibodies generated by vessel injury and other causes result in excessive platelet aggregation and consumption. Recently, many autoimmune diseases and conditions associated with vascular injury have been reported to be accompanied by TTP-like feature, such as microangiopathic hemolytic anemia and thrombocytopenia. Anti-glomerular basement membrane(GBM) mediated glomerulonephritis is also related to autoantibody against collagen IV fiber in GBM, and cha- racterizded by diffuse glomerular capillary injury. Although the relationship of these two diseases is not clearly defined, here we report a case of anti- GBM antibody disease accompanied by TTP-like feature in a 40-year old man admitted for dyspnea. The patient had hemolytic anemia, thrombocytopenia, and acute renal failure. Anti-GBM antibody was positive and crescent formation and linear deposition of IgG along glomerular basement membrane was seen in renal biopsy. Disease progressed with no clinical response despite of prompt treatment by steroid and cyclophosphamide pulse therapy and plasmapheresis.
항공 통신 기술 : L-대역 디지털 항공 통신 시스템의 수신 성능 분석
천정현 ( Jeong Hyeon Cheon ),윤경한 ( Kyung Han Yoon ),장수현 ( Soo Hyun Jang ),정윤호 ( Yun Ho Jung ) 한국항행학회 2015 韓國航行學會論文誌 Vol.19 No.2
최근 항공 통신의 데이터 트래픽 증가로 인하여, 대륙 간 항공통신을 위한 L-band 대역 디지털 통신시스템인 LDACS가 제안되었다. LDACS 모델은 LDACS type-1과 LDACS type-2의 두 가지 규격으로 정의 되었으며, 향후 면밀한 검토를 바탕으로 한 가지 시스템을 선정하여 운용하기로 하였다. 이에 본 논문에서는 두 LDACS 시스템의 규격 분석과 함께 채널 환경에 따른 수신 성능을 비교 및 평가함으로써 항공 통신 시스템에의 적용 가능성을 분석하였다. 분석결과, 두 시스템 모두 airport 채널 환경에서 큰 성능 열화를 보였으나 LOS 환경의 en-route 채널의 경우에 우수한 성능을 보임을 확인할 수 있었다. 또한, en-route 환경에서 LDACS type-1과 LDACS type-2의 비교 분석 결과, LDACS type-2 대비 LDACS type-1의 수신 성능이 BER 기준 1 dB 우수함을 확인 할 수 있었으며, 이는 보다 강력한 채널 부호가 적용되었기 때문으로 판단된다. Due to the increase in the data traffic for the aeronautical communications, LDACS has been proposed to support the data link in the continental domain. LDACS is defined in two standards of LDACS type-1 and LDACS type-2, which are going to be selected through the intensive comparison. In this paper, we analyzed two types of standards and evaluated their performance for various channel models. Simulation results show that both LDACS type-1 and LDACS type-2 have a good performance in the en-route channel model, while they have a poor performance in the airport channel model. In the comparison results for LDACS type-1 and LDACS type-2, LDACS type-1 shows the better performance of 1dB than LDACS type-2 owing to the stronger channel coding technique.