관상동맥우회 이식편으로서의 우위대망동맥의 조직학적 특징

이현우,송현,유동곤,임한중,이재원,송명근,Lee, Hyun-Woo,Song, Hyun,Yoo, Dong-Gon,Lim, Han-Jung,Lee, Jae-Won,Song, Meong-Gun 대한흉부심장혈관외과학회 1999 Journal of Chest Surgery (J Chest Surg) Vol.32 No.10

Long term patency of arterial graft has been better than venous graft and redo coronary artery bypass grafting has been increasing, therefore, there has been an increasing need for alternative arterial grafts except internal thoracic artery(ITA). Material and Method: Right gastroepiploic arteries(RGEA) were harvested from 100 patients who had received gastrectomy for gastric cancer or ulcer. ITAs were obtained from 10 patients undergoing coronary artery bypass grafting. The length of RGEA was measured from the pyloric ring. Items of the morphometric and histologic study at the pyloric ring and sites of the 10cm and 20cm RGEA from the pyloric ring were luminal diameter, intimal thickness, medial thickness, wall thickness, degree of intimal hyperplasia, intimal thickness, medial thickness, wall thickness, degree of intimal hyperplasia, intimal thickness index, medial thickness index, and the number of discontinuities of the internal elastic lamina. Similar items were applied to the proximal site of ITAs. Result: The length of RGEA was 23${\pm}$2.7cm(range 17∼31cm). Comparing the 20cm RGEA with ITA, intimal thickness, medial thickness, wall thickness, and degree of intimal hyperplasia did not show any difference(p>0.05). However, 20cm RGEA was greater than ITA at the luminal diameter, intimal thickness index, and the number thickness and wall thickness in each site of the RGEA(pyloric ring, 10cm, 20cm) decreased from the pyloric ring to the distal sites(p<0.05). The degree of intimal hyperplasia and the number of discontinuities of the internal elastic lamina did not show any difference between the pyloric ring and 10cm, however, those of 20cm were smaller than these sites(p<0.05). RGEA had more number of discontinuities of the internal elastic lamina and rich smooth muscle cells in the media than ITA. Conclusion: The length and diameter of RGEA is good enough to reach most of the coronary arteries. Moreover, long term patency of RGEA may be improved, if anastomosed in the distal site.

석재가공용 다이아몬드 톱의 제조 및 특성

이현우,전우용,이오연,설경원,Lee Hyun-Woo,Jeon Woo-yong,Lee Oh-yeon,Seol Kyeong-won 한국분말야금학회 2004 한국분말재료학회지 (KPMI) Vol.11 No.5

The purpose of the present study is to determine an optimum composition using cheaper powders keeping with high performance of hard rock cutting diamond saw blade. With 50Fe-20(Cu . Sn)-30Co specimen, a part of Co was replaced by Ni(5%, 10%, and 15%, respectively). These specimens were hot pressed and sintered for predetermined time at various temperature. Sintering is performed by two different methods of temperature controlled method and specimen dimension controlled method. In order to determine the property of the sintered diamond saw blade, 3 point bending tester, X-ray diffractometer, and SEM were used. As the Co in the bond alloy was replaced by Ni, the hardness of the specimen increased. Thus the 50Fe-20(CuㆍSn)-15Co-15Ni specimen showed the maximum hardness of 104(HRB). The results of 3 point bending test showed that flexure strength decreased along with increase in Ni content. This is attributed to the formation of intermetallic compound(Ni$_{x}$Sn) determined by X-ray diffraction. The fracture surface after 3 point bending test showed that diamond was fractured in the specimen containing 0%, 5%, and 10%Ni, and the fracture occurred at the interface between diamond and matrix in the specimen containing 15%Ni. The cutting ability test showed that the abrasive property was not changed in the specimen containing 0%, 5%, and 10%Ni. The optimum composition determined in this study is 50Fe-20(CuㆍSn)-20Co-10Ni.

측창 및 온실 폭이 자연환기 성능에 미치는 영향

이현우,우영회,이종원,Hyun Woo Lee,Young Hoe Woo,Jong Won Lee 국립한국농수산대학교 교육개발센터 2023 현장농업연구지 = Journal of practical agricultural resear Vol.25 No.1

In summer, the natural ventilation performance for varying greenhouse width is very important in the glasshouses for year round cultivation. The effect of the side openings and greenhouse width on natural ventilation performance was analyzed by simulation. The necessary ventilation rate with different solar radiation transmittance increased significantly when the outside temperature grows higher. The necessary ventilation rate of 40% transmittance was about half of that of 90% transmittance. In consequence, shading effect on temperature control in greenhouse is significant in summer. When the total area of the openings for ventilation is constant, the maximum ventilation rate happens when the area of roof openings is equal to the area of side openings. This maximum ventilation rate is about 3 times of that of the greenhouse with roof openings and without side openings. Therefore, the side openings are advantageous to improve the natural ventilation in greenhouses. As the greenhouse width increases, the influence of side openings on the ventilation rate is becoming smaller. If the natural ventilation rate of the greenhouse with roof and side openings is to become double of that of the roof openings only, the width should be narrower than 38.4m for the Venlo type and 64m for Wide span type.

서초동(서울시 서초구)의 거미상

김주필(Joo Pil Kim),정혜리(Hye ri Jeong),김대희(Dae Hee Kim),박동우(Dong Woo Park),서재웅(Jae Woong Seo),이현우(Hyun woo Lee) 한국거미연구소 2017 한국거미 Vol.33 No.1

2016년 3월 31일부터 7월 31일까지 서울특별시 서초구 서초동에 위치한 서울고등학교 교정 일대를 서울고등학교 환경생물부 부원들이 채집 조사한 결과 20과 43속 53종의 거미가 조사 연구되어 이에 보고하는 바이다. From March 31st to July 31st in 2016, members of an environmental biology club at Seoul High School located in Seocho-gu, Seoul, Dae-Hee Kim, Dong-Woo Park, Jae-Woong Seo and Hyun-woo Lee, collected 20 families 43 genera 53 species of spiders and report the result of the study here.

위상 천이 소프트 스위칭 PWM DC-DC 컨버터를 이용한 방전등 구동용 직류 전원장치

이현우,정상화,권순걸,서기영,Lee, Hyun-Woo,Jung, Sang-Hwa,Kwon, Soon-Kurl,Suh, Ki-Young 한국조명전기설비학회 2005 조명·전기설비학회논문지 Vol.19 No.7

Generally, high frequency switching DC-DC converter that DC power supply for discharge lamp drive to generate ultraviolet rays(UV) is acted by hard switching mode is used. Therefore in this paper, wish to mix first existent first-side status phase shift PWM DC-DC converter and posing secondary-side status phase shift PWM DC-DC converter by high frequency link DC-DC converter that use soft switching circuit technology and develop DC power supply for discharge lamp drive. DC power supply driving Discharge lamp proposed describe validity through simulation and an experiment. 일반적으로 자외선(UV)을 발생하기 위한 방전등 구동용 직류 전원장치는 하드 스위칭 모드로 동작되어지는 고주파 스위칭 DC-DC 컨버터가 사용되고 있다. 구체적으로 전원장치는 전자 노이즈 장해에 의한 전자 회로의 오동작이나 각 구성 소자의 발열의 문제 등이 시스템의 신뢰성을 저하시키는 원인이 되고 있다. 그러므로 본 논문에서는 소프트 스위칭 회로 기술을 사용한 고주파 링크 DC-DC 컨버터로서 먼저 구체적으로 1차측 위상 천이 PWM DC-DC 컨버터와 제안한 2차측 위상 천이 PWM DC-DC 컨버터를 조합하여 방전등 구동용 직류 전원장치를 제안하였다. 제안하는 방전등 구동용 직류 전원장치는 시뮬레이션과 실험을 통하여 그 타당성을 서술하였다.

Active Learning과 군집화를 이용한 고정키어구 추출

이현우,차정원,Lee, Hyun-Woo,Cha, Jeong-Won 대한음성학회 2008 말소리 Vol.66 No.-

We describe a new active learning method in conditional random fields (CRFs) framework for keyphrase extraction. To save elaboration in annotation, we use diversity and representative measure. We select high diversity training candidates by sentence confidence value. We also select high representative candidates by clustering the part-of-speech patterns of contexts. In the experiments using dialog corpus, our method achieves 86.80% and saves 88% training corpus compared with those of supervised method. From the results of experiment, we can see that the proposed method shows improved performance over the previous methods. Additionally, the proposed method can be applied to other applications easily since its implementation is independent on applications.

오우크쇼트의 ‘시민성’(civility) 개념과 시민교육적 함의

차미란(Cha, Mi-Ran) 한국도덕윤리과교육학회 2021 도덕윤리과교육 Vol.- No.73

2015 개정 도덕과 교육과정에서 도덕과 교육의 지향점으로 제시된 ‘도덕적인 인간과 정의로운 시민이라는 중첩된 인간상’은 인간과 시민의 구별, 인성교육과 시민교육의 관계에 관한 해명을 요청한다. 본 연구는 오우크쇼트의 정치철학과 정치교육론을 중심으로, 루소가 『에밀』에서 제시하는 ‘자연인’으로서의 인간과 ‘사회인’으로서의 시민 사이의 대비를 해석하고, 인간교육과 시민교육의 모순적 관계를 해소하는 대안적 관점을 모색해보고자 하였다. 근대 국가의 성격을 설명하는 두 가지 결사체 형태로서의 ‘시민적 결사체’와 ‘기업적 결사체’, 그 두 가지 결사체에 각각 상응하는 ‘시민’과 ‘대중’의 구분에 관한 오우크쇼트의 논의는 ‘시민성’개념이 ‘개인성’에 기반을 두고 있다는 점을 보여 준다. 오우크쇼트의 정치교육론에 따르면, 모든 진정한 교육은 개별적 인간의 내면에 인간다움과 도덕성을 갖추도록 하는 인성교육인 동시에 시민적 결사체의 정당한 구성원으로서의 자질을 갖추도록 하는 시민교육이다. 훌륭한 시민은 획일화된 대중이 아니라 지성과 자율성을 갖춘 주체적 개인이라는 점에서, 정의로운 시민을 기르기 위한 시민교육은 진정한 ‘개인성’을 함양하는 교육이어야 한다. 특히, 기업적 결사체로서의 국가에서 시행되는 ‘시민교육’이 다수의 이익 실현에만 관심을 두는 ‘대중’을 양성할 위험에 대한 오우크쇼트의 경고는 심각한 의미를 가진다. The ‘overlapping ideals of a moral human being and a righteous citizen’, presented as the direction for moral studies education in the 2015 revised moral education curriculum, asks for an explanation of the distinction between humans and citizens and the relationship between character education and civic education. This study is an attemt to find an alternative perspective that resolves the contradictory relationship between negative education for ‘human’ as natural being and positive educstion for ‘citizen’ as social being in Rousseau’s 『Emile』, focusing on Oakeshott"s political philosophy and his views on political education. Oakeshott"s discussion on the distinction between ‘cive’ and ‘mass’ corresponding to the two associations, ‘civil association’ and ‘enterprise association", as two forms of association explaining the nature of the modern state, shows that the concept of ‘civility’ is based on ‘individuality’. According to Oakeshott"s views on political education, all true education is character education that equips each individual with humanity and morality, and at the same time, civic education that enables them to qualify as just members of a civil association. Since a good citizen is not one of mass but a free individual with intelligence and morality, civic education to raise righteous citizens should be an education cultivating ‘individuality’. In particular, we need to take Oakshott"s warning seriously that ‘citizenship education’ implemented in the state as an enterprise association could result in nurturing the ‘mass man’ who only cares about the realization of the common interests of the majority.

이열 하악관(Bifid Mandibular Canal): 방사선적 소견과 임상적 의의 -증례보고-

이현우,김여갑,이백수,권용대,최병준,김영란,Lee, Hyun-Woo,Kim, Yeo-Gab,Lee, Baek-Soo,kwon, Yong-Dae,Choi, Byung-Jun,Kim, Young-Ran 대한치과마취과학회 2009 Journal of Dental Anesthesia and Pain Medicine Vol.9 No.1

When performing the inferior alveolar nerve block anesthesia, surgeon often faced a difficulty of the surgical operation due to the incomplete anesthesia. One of the reason is the variety of mandibular canal anatomy. Up to now, there are some reports of index cases about bifid mandibular canal among mandibular canal anatomic variation, and some classification is applied according to anatomical location and configuration. When surgical operation is performed involving mandible such as dantal implant treatment, extraction of an impacted third molar, sagittal split ramus osteotomy, etc, the position of mandibular canal should be considered. Bifid mandibular canal clinically causes troublesome cases of anesthesia when inferior alvelor nerve block, especially is performed extraction of an impacted third molar. Therefore, It is important for clinicians to recognize the presence of bifid canals on radiographys. Nowadays, the position of mandibular canal can be measured precisely by using Dental CT. It is not found by panorama image but is found by Dental CT sometimes. Among the patients, which take panorama and Dental CT simultaneously, for tooth extraction of lower impacted third molar in our department, we report the case that did not identifying in panorama but identifying it in Dental CT.

A Case of Globus Hystericus caused by psychological, digestive disorder

이현우,장유진,홍승욱,Lee, Hyun-Woo,Chang, You-Jin,Hong, Seung-Ug The Society of Korean Medicine Ophthalmology 2013 한방안이비인후피부과학회지 Vol.26 No.2

Objectives : 본 연구를 통해 정신과적, 소화기성으로 유발된 히스테리성 구를 반하백출천마탕과 자음건비탕으로 치료한 1례를 보고하려 한다. Methods : 오심, 불면, 이명, 소화불량, 초조, 두통, 매핵기를 주소로 하는 23세 여성 환자를 대상으로 약 4개월 동안 침구, 반하백출천마탕과 자음건비탕으로 치료하였다. Results & Conclusions : 4개월 동안의 치료 후, 히스테리성 구와 다른 증상들이 소실되었다. 이 논문에서는, 소화기계 장애와 정신 질환 치료를 위해 오랫동안 사용되어온 반하백출천마탕과 자음건비탕을 히스테리성 구 치료에 이용하였다. 결론적으로, 본 연구는 히스테리성 구와 소화기계 장애가 밀접한 관련이 있음과 히스테리성 구에 대한 한의학적 치료의 중요성을 제시하였다.

16~18세기 영·호남 누정에 깃든 문화경관의 의미론적 해석 - 지정 문화재를 중심으로 -

이현우,Lee, Hyun Woo 국립문화재연구원 2012 헤리티지:역사와 과학 Vol.45 No.1

본 연구는 국가지정 또는 시도지정 문화재 중 총 22개의 영 호남 소재 누정을 중심으로 16~18세기 명리를 등지고 초야에 은거한 사림(士林)의 누정 문화를 고찰함으로써, 조영자의 자연관과 누정건립 등의 문화형성과정에서 축적된 미의식을 구명하고자 하였다. 특히 본 연구에서는 개별 누정에 작용된 의미론적 경관특성을 밝히기 위한 제안으로 '풍수적 입지 누정명 분석 누정문학 분석' 등의 해석을 시도하였다. 본 연구를 통해 확인된 주요 결과는 다음과 같다. 누정의 '입지[風水] 명칭[懸板] 문학[板上詩]' 등의 분석 및 해석 결과를 토대로 한국 누정만이 갖는 특수성을 논한다면, 누정의 입지는 풍수가 지향하는 목표와 일맥상통함이 확인되었는데, 이는 땅의 모양(物形)을 의미론적 풍수형국으로 해석함으로써 은유적이면서도 풍자적으로 '터잡기' 한 특징에서도 잘 드러나고 있다. 특히 풍수형국론(風水形局論) 관점에서 본 누정의 입지는 배산임수의 요건을 모두 충족했으며, 지향했던 전형적인 좌향은 남동향임이 확인되었다. 또한 땅의 모양에 대한 직관적이거나 자연론적인 표현보다는, 서로 다른 의미를 부여하여 은유적이면서도 풍자적으로 표현함으로써, 전통적 경관짜임의 특징을 형이상학적인 해학(諧謔)으로까지 승화시키고자 하는 보편성이 발견된다. 더 나아가 누정의 입지를 광역적 경관인식 체계로 본 의미론적 낙토(樂土) 개념이 표출되고 있다. 한편 누정명은 누정이 위치한 서로 다른 개별적 경관을 응축함으로써 상정된 의미론적인 어휘였다. '누정명의 어의 분석'에서 가장 높은 빈도를 보인 것은 주변경관을 간명한 어휘로 함축한 것인데, 그 특징은 첫째 '자연예찬(自然禮讚)' 즉 승경(勝景) 및 사시경물(四時景物)에 대한 흥취, 둘째, '유가사상(儒家思想)'과 관련된 경서(經書) 문장(文章) 성리학적 가치관 중국의 고사성어, 셋째, '선현칭송(先賢稱頌)'에 관한 상고성(尙古性), 넷째, 유유자적과 안빈낙도의 전형으로 청빈하지만 자존적인 삶의 '풍류(風流)', 다섯째, '도가사상(道家思想)'과 관련하여 좌절된 자아를 달래기 위한 치유수단으로써의 '선경(仙境) 갈구' 등이 깊이 내포되어 있었다. 특이하게도 16세기 초반까지는 유가사상에 기반을 둔 명칭이 주류를 이루었지만, 16세기 중반을 넘기며 '자연예찬 및 선현칭송'의 제재가 증가하면서 유가사상에만 편중되지 않는 제재 상의 다양성을 보여준다. 이와 함께 문학이란 예술장르를 빌어 아름다운 자연에 비긴 작가의 심상을 투영시킴으로써 내면의 문제를 완곡히 토로한 누정문학의 주요한 특성으로는 '자연예찬 풍류 도가사상 및 유가사상 선현칭송' 등의 보편성과 '우국충정 연군지정 과거회상' 등의 키워드가 도출되었다. 그러나 이 당시 팽배했던 '성리학적 유교관'에도 불구하고 누정문학을 주도한 일의적(一意的) 개념이 '자연예찬 및 풍류'였음은 매우 주목할 만하다. This research has studied the building awareness of Nu-Jeong that a view of nature and aesthetic consciousness to unite the nature are inherent by considering Nu-Jeong of scholars who left fame and wealth behind and retired to hermitage in the backwoods in the 16~18 Century. This is to clarify correlation with leaving nature as it is, namely, an ideal state that scholars at the time would enjoy, through landscape awareness accepted into Nu-Jeong literature. In addition, this research has tracked the ideologic flow that acts on space formation by clarifying Korean unique meanings inherent to Nu-Jeong's cultural landscape. As a suggestion for this, the interpretation through 'Pungsu location Nu-Jeong name's analysis Nu-Jeong literature analysis', etc. was tried, so its integrated conclusion is as follows. It is not a chance that scholars of Joseon have left numerous literature works singing the nature. They already had huge interest and knowledge on the nature, and achieved active poetic exchange by sublimating the praise of nature as literature. Nu-Jeong, which was a place of exchange like this, had cleanliness of the nature and ideological purity as an oppositional space on turbid political realities. The Nu-Jeong literature drew the nature into a literature space as it is, without doing abstraction or ideation on the nature. The owner of Nu-Jeong exclusively possessed such natural landscape in grim and independent postures, so it provided a clue of Nu-Jeong cultural landscape that this research aimed to discuss. Scholars who aimed to raise wide and large vigor filled in between the sky and earth got to convince that people are born from the nature, grow in the nature and finally return to the nature. What people are born from the nature and finally return to the nature is just consistent with Taoistic and Zhua-ngzi thoughts denying human work, and leaving nature as it is or nature itself remained intact which is an ideal state. The construction at the time is a vessel containing the spirit of the times of the era. This thesis has proved that the Nu-Jeong culture of scholars located on the central line of Korean landscape was the flower of Joseon's scholar culture by interpreting it semantically.