보조적 이소성간이식의 역사적 고찰과 확대 임상적용 가능성의 재고

유창현(Chang Hyun Yoo),김준현(Jun Hyun Kim) 대한외과학회 1995 Annals of Surgical Treatment and Research Vol.48 No.1

乙類農地稅 課稅의 適正化 方案

柳昌鉉 청주대학교 기업경영학연구소 1982 經營學論集 Vol.4 No.-

항공기 휴대용 디스플레이 장비의 요구 성능 분석

유창현,이득원,이승필,이강인 한국항공우주학회 2013 한국항공우주학회 학술발표회 논문집 Vol.2013 No.11

항공기에는 수많은 전자 장비가 적용되어 있고, 이중에 디스플레이 장비는 조종사에게 각종 정보를 제공하는 중요한 장비이다. 본 논문은 항공기 개조 없이 다양한 기종에서 개조장비를 적용하고자 할 때 이와 연동이 가능하면서, 조종사에게 각종 정보를 제공하는 항공기 휴대용 디스플레이 장비에 대한 요구 성능 분석을 하고자 한다. 이와 같이 제시된 휴대용 디스플레이 장비의 요구 조건들과 더불어 항공기 운용환경을 이해하고 요구규격들을 충분히 검토함으로써 향후 항공기 개조사업에도 효율적으로 응용 설계가 가능 할 것으로 기대한다. The numerous electronic equipment is applied to an aircraft, the display equipment of them is the important equipment providing the various information to the pilot. In this paper, we present analysis on the requirement of the avionic portable display equipment that is available to connect remodeling equipment and provides the various information to the pilot, when remodeling equipment is mounted on various types of aircraft without aircraft modifications. so we expect that applied design is efficiently possible in the aircraft remodeling business afterward by fully reviewing requirements of avionic portable display equipment with understanding operational environment of aircraft.

장형 위암과 미만형 위암의 비교 연구

유창현(Chang Hyun Yoo),김상효(Sang Hyo Kim),이선경(Seun Kyung Lee) 대한소화기학회 1990 대한소화기학회지 Vol.22 No.2

A comparative study on the intestinal (IGC~) and diffuse types of gastric carcinoma (DGC) ~was performed in order to imestigate ~their characteristics in clinico-pathological and epidemiological points of view. The specimens studied were 3,165 consecutive cases of gastric carcinoma, obtained by surgical resection and endoscopic biopsy during the period of 21 years from 1968 to 1988. All the cases were classified according to Laurens classification and were analyzed statistical~ly. The resu)~ts obtained were summarized as follows: ~1} The a~nn~ual incidence of the IGC during last 21 years were gradually decreased, while converse~ly a~nnual i~ncidence of the DGC were relatively increased. With lapse of time, the incidence of IGC in middle aged patients decreased and that in old aged patients increased, the DGC, however, was not changed significant~)~y in all age group. 2) The average age of male patients with IGC ~was 54.4~-year~-old a~nd ~0at of female ~With IGC ~53.6. There was no significant difference between average age of both sexes. The average age of patients with DGC was 49.0~-year~-old and that of female with DGC 46.7. There was sig~nificant difference between average age of both sexes. The average age of patients with IGC was 54.2 and of DGC 48. 0. The age difference in both hi~stological types was significant. 3) The 1GC frequently involved distal portion of the stomach, but the DGC more frequently proximal portion than IGC. The IGC was more frequent in Borrmann type I and II and the DGC frequent in Rorrmann type III and IV. On the basis of the above findings, it was suggested that the IGC is relatively more frequent in men and old patients, in distal portion of the stomach, and in grossly loca~lized forms, the DGC, on the other hand, predominates in women and younger patients, in proximal portion of the stomach, and in grossly diffuse invasive forms. And then the author supported the theory that the gastric carcinoma encompasses two separate diseases.

항공기용 디지털 다기능 시현기의 등화기 회로 적용을 통한 화면 노이즈 개선 설계

유창현(Chang-Hyun Yoo),장정수(Jung-soo Jang),이득원(Duck-Won Lee) 한국항공우주학회 2011 한국항공우주학회 학술발표회 논문집 Vol.2011 No.11

본 논문은 항공기용 디지털 다기능시현기의 간헐적으로 발생했던 화면 노이즈 현상을 개선하기 위한 회로 설계내용을 제안한다. 항공기의 화면노이즈 문제는 다기능시현기 단일장비의 결함이 아니라 항공기 구조의 특이성과 연관되어 발생하는 복합적인 문제로 추정되었으며, 이러한 문제점들은 보완해 주기 위하여 수신부 끝단인 다기능시현기에 등화기(Equalizer) 회로를 적용하여 신호의 왜곡을 보상해 주는 방안을 모색하였다. In this paper, we present a circuit design that improving intermittent display noise of Avionics Digital Multi Function Display, The cause of display noise at avionics system is thought to have been not a fault of Multi Function Display but complex problem that involves avionics own unique characteristics. To improve these problems, we had investigated a method to compensate skewed signals using a equalizer circuit at the end of receiver, Multi Function Display.

버섯균의 배양 및 보존

유창현 ( Chang Hyun You ) 한국균학회 1995 버섯재배 기술개발 특별강연회 Vol.- No.-

느타리버섯 재배기술

유창현 한국균학회 1996 버섯재배개발심포지움 Vol.- No.-

江原地域 鐵器時代 住居址 內 爐址 硏究

유창현 ( Yoo Chang-hyun ) 중부고고학회 2007 강원고고학보 Vol.9 No.0

불을 이용하여 난방, 취사, 조명, 제습 등의 기능을 하는 화덕시설을 ‘爐’라고 하며 화덕자리, 즉 ‘爐址’는 이러한 기능이 중지된 상태의 터를 말한다. 본고에서는 인간이 본격적으로 일정지역에 정착생활을 시작하면서 조성한 주거 내부시설 가운데 불을 사용한 흔적인 노지에 대한 연구를 강원지역 철기시대 주거지를 통해 살펴보고자 한다. 그동안 노지의 형식은 제한적인데 비해 그 명칭에 대해서는 연구자의 시각에 따라 다르게 불려지고 있으며, 대부분의 보고서에는 자세하게 언급되지 않아 노지의 구조 및 기능적인 속성을 파악하는데 있어 어려움이 따랐다. 본고에서는 노지의 형식을 爐를 만든 주재료와 구조적인 특징에 따라 분류하였다. 노지를 만든 주재료에 따라 재료를 사용하지 않은 무시설식노지를 평지식과 수혈식으로 나누고 석재를 이용한 노지를 위석식, 부석식, 판석식으로, 점토재를 이용한 노지를 점토띠식과 점토둑식으로 나누어 보았다. 또한 이러한 노지의 형식이 결합되어 나타나는 점을 고려하여 결합식의 노지 형식을 따로 구분하였는데, 결합된 형태에 따라 판석형위석식, 부석형위석식, 부석형점토띠식, 판석형점토띠식 등으로 나누어 새로운 형식의 용어를 제시하였다. 마지막으로 구조적인 특징에 따라 아궁이 시설, 부뚜막 시설, 쪽구들(터보식) 시설로 구분하였다. 다음으로 위와같은 노지의 형식 분류를 통해 강원지역 철기시대 유적 중 노지가 확인되는 주거유적의 분포양상을 확인한 후, 주거유적에서 확인되는 노지를 영동지역과 영서지역으로 나누어 그 특징을 살펴보고자 한다. A stove using fire, which has the function of heating, cooking, lighting and dehumidification, is called a furnace(爐). A furnace site(爐地) is a place which has stopped these abilities. This manuscript will describe about how mankind started to settle in a regular place developing a furnace inside the habitation, by observing the Kangwon province’s Iron Age dwelling sites. To this present day the form of a furnace is limited, but by the researchers view the names differ. In most reports these problems are not stated, so it is difficult to understand the structure of a furnace and its functions. In this manuscript the materials and structural forms of a furnace have been classified, and the specifications of the furnaces in the Kangwon province’s Iron Age dwelling sites have been examined. As a result, the dwelling sites of the Iron Age in the Kangwon Province, long and short ratio’s are under 1.5:1,the settlements which are over 2.4:1 have not been confirmed but except for the ‘Buddumak' type furnaces, these dwelling sites with long and short ratios mostly have one furnace. The location of the furnace site lies on the middle of the axis leaning north. The types of the furnace are, Pyongji type, 'Suhyul' type, Busuck' type, 'Pansuck' type, 'Jumtoddi’ type, ‘Jumtodduk’ type, 'Busuck-Jumtoddi' type, 'Pansuck-Jumtoddi’ type, 'Busuck-Wisuck' type, Agungi type, 'Buddumak' type, 'Tunnel' type and so forth. The double 'Pansuck-Jumtodai’ furnace only located in the west of Kangwon provice has a similar form in the east, which is the 'Pansuck-Jumtoddi’ furnace. The 'Tunnel' type furnace has improved the cooking and heating functions in the same time bringing an alter in the habitation site.

Cross-flow micro-hydrogen jet flame에 의한 저NOx 연소특성

유창현(Changhyun You),황상순(Sangsoon Hwang) 한국연소학회 2020 KOSCOSYMPOSIUM논문집 Vol.2020 No.9

Radiological and Clinical Effectiveness of a Novel Calcaneal Fracture Brace after Intraarticular Calcaneal Fracture Surgery

유창현,강찬,Deuk-Soo Hwang,,황정모,이기수,박용철 대한정형외과학회 2018 Clinics in Orthopedic Surgery Vol.10 No.3

Background: After calcaneal fracture surgery, a short leg splint and cast are typically applied. However, these restrict joint exercises, which is inconvenient for patients. In addition, there is a risk of complications, such as pressure ulcers or nerve paralysis with a short leg cast. In this study, we evaluated clinical and radiological outcomes of the use of a specially designed calcaneal brace after calcaneal fracture surgery. Methods: From among patients who underwent open reduction and internal fixation for calcaneal fracture between July 9, 2013 and May 31, 2017, 102 patients who wore a calcaneal fracture brace (group A) and 82 patients who wore a postoperative short leg cast (group B) were randomly chosen for this study. Radiological changes and clinical factors were compared between the two groups. After swelling at the surgical site decreased, a special calcaneal brace was applied to patients in group A. They were allowed to perform early weight bearing and joint motion. Patients in group B were immobilized in a short leg cast and were told to avoid weight bearing for 6 weeks. In each group, the Böhler’s angle and Gissane’s angle were measured and compared using postoperative and final follow-up radiographs. Pain (measured using a visual analogue scale [VAS]) and ankle joint range of motion (dorsiflexion, plantar flexion, eversion, and inversion) were measured serially until the final follow-up visit. Results: There were no significant differences in the Böhler’s angle or Gissane’s angle between the two groups as measured postoperatively and at the final follow-up (paired t -test). Differences in the VAS pain score and eversion were also statistically nonsignificant between the two groups. However, group A had a significantly higher range of dorsiflexion (p = 0.021), plantar flexion (p = 0.012), and inversion (p = 0.045) of the ankle than group B (independent t -test). Conclusions: Application of the calcaneal fracture brace after open reduction and internal fixation of a calcaneal fracture not only maintained the fracture reduction but allowed for greater joint motion than the short leg cast. Thus, the calcaneal fracture brace can be considered an effective postoperative management option that enables early resumption of daily activities and facilitates postoperative joint motion.