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김광호,김정택,이서원,김혜숙,임현경,이춘수,선경,Kim, Kwang-Ho,Kim, Joung-Taek,Lee, Seo-Won,Kim, Hae-Sook,Lim, Hyun-Kung,Lee, Choon-Soo,Sun, Kyung 대한흉부심장혈관외과학회 1999 Journal of Chest Surgery (J Chest Surg) Vol.32 No.4
배경: 최근에 시작된 소절개선을 이용한 심장수은술 환자에게 미용상 효과가 좋으며, 통증이 적으며 빠른 회복을 가져온다. 본 교실에서는 그간 실시한 소절개심장수술의 현황을 임상고찰하였다. 대상 및 방법: 1997년 2월 흉골좌연종절개선으로 관상동맥우회술을 실시한 이후 1998년 11월까지 총 31례의 소절개술을 이용한 심장수술을 실시하였다. 남녀 비는 17:14였으며, 1세에서 75세까지의 연령분포를 보였다. 흉골좌연종절개술을 실시한 예는 9례로 관상동맥 질환으로 인공심폐기의 사용없이 박동상태에서 내유동맥으로 좌전행지관상동맥에 우회술을 실시하였는데, 그 중 1례는 내유동맥의 비꼬임으로 술 후 1주일 째 재수술한 경우였다. 흉골우연종절개는 1례로 승모판교련절개술 후 재발된 협착증에 대해 승모판치환술을 실시한 경우였다. 소흉골절개선으로 수술한 예는 21례로, 승모판치환 및 삼첨판성형술이 6례, 승모판치환술 5례, 중복판치환술 2례, 대동맥판치환술 1례, 좌심방점액종 1례, 심방중격결손증 2례, 심실중격결손증 2례, 우심실 자창 1례였다. 처음 5례는 T형의 흉골소절개를 실시하였으나 경험이 쌓이면서 대동맥기저부의 노출이 좋고 흉골 봉합시 안정감이 높은 화살모양의 흉골소절개를 실시하였다. 결과: 수술시간, 인공심폐 구동시간, 대동맥차단시간, 인공호흡기 사용기간, 수술 1일까지의 흉관배액양, 흉관 거치기간, 집중치료실 입원기간 등은 기존의 정중흉골절개선 예들에 비하여 큰 차이가 없었다. 수술 후 사망 예는 2례였으며 1례는 흉골소절개선으로 승모판치환 수술 1일에 대동맥 삽관부위의 파열로 출혈 사망하였고, 다른 1례는 흉골좌연종절개선으로 관상동맥우회술 후 2일에 부정맥으로 사망하였다. 사망의 원인과 수술절개선의 선택과는 직접적인 관련이 없었다. 합병증은 뇌색전증 1례, 창상의 혈종 1 례가 있었다. 결론: 소절개선으로도 정중흉골절개선과 마찬가지로 심장 수술을 효과적으로 실시할 수 있을 것으로 생각된다. Background: Minimally invasive technique for various cardiac surgeries has become widely accepted since it has been proven to have distinct advantages for the patients. We describe here the results of our experiences of minimal incision in cardiac surgery. Material and Method: From February 1997 to November 1998, we successfully performed 31 cases of minimally invasive cardiac surgery. Male and female ratio was 17:14, and the patients age ranged from 1 to 75 years. A left parasternal incision was used in 9 patients with single vessel coronary heart disease. A direct coronary bypass grafting was done under the condition of the beating heart without cardiopulmonary bypass support(MIDCAB). Among these, one was a case of a reoperation 1 week after the first operation due to a kinked mammary artery graft. A right parasternal incision was used in one case of a redo mitral valve replacement. Mini-sternotomy was used in the remaining 21 patients. The procedures were mitral valve replacement and tricuspid annuloplasty in 6 patients, mitral valve replacement 5, double valve replacement 2, aortic valve replacement 1, removal of left atrial myxoma 1, closure of atrial septal defect 2, repair of ventricular septal defect 2, and primary closure of r ght ventricular stab wound 1. The initial 5 cases underwent a T-shaped mini-sternotomy, however, we adopted an arrow-shaped ministernotomy in the remaining cases because it provided better exposure of the aortic root and stability of the sternum after a sternal wiring. Result: The operation time, the cardiopulmonary bypass time, the aorta cross-clamping time, the mechanical ventilation time, the amount of chest tube drainage until POD#1, the chest tube indwelling time, and the duration of intensive care unit staying were in an acceptable range. There were two surgical mortalities. One was due to a rupture of the aorta cannulation site after double valve replacement on POD#1 in the mini-sternotomy case, and the other was due to a sudden ventricular arrhythmia after MIDCAB on POD#2 in the parasternal incision case. Postoperative complications were observed in 2 cases in which a cerebral embolism developed on POD#2 after a mini-sternotomy in mitral valve replacement and wound hematoma developed after a right parasternal incision in a single coronary bypass grafting. Neither mortality nor complication was directly related to the incision technique itself. Conclusion: Minimally invasive surgery using parasternal or mini-sternotomy incision can be used in cardiac surgeries since it is as safe as the standard full sternotomy incisions.
최근 국내외에서 육성된 무궁화 127 품종 중 조경적 활용가치가 높은 유망품종 선발
김광호 ( Kim Kwang-ho ),이춘석 ( Lee Chun-suk ),강호철 ( Kang Ho-chul ) 한국전통조경학회 2016 한국전통조경학회지 Vol.34 No.3
This study was carried out to characterize 127 recently developed cultivars of Rose of Sharon (Hibiscus spp.) in Korea and foreign Countries for landscape uses. The examined factors were growth characteristics such as tree height of a 1-year grafted plant(cm), plant type, growth habit, leaf characteristics such as shape and size, flower characteristics such as color, shape, size, and red eye during 2014 and 2015 for landscape uses. The results are obtained as follows; In the results of flower color of the 127 recently developed cultivars, pink color with red eye spot, white color with red eye spot, purplish red color with red eye spot, violet purple color with red eye spot, crimson color with red eye spot, asadal, blue color with red eye spot, and white color were distributed. In the flower characteristics, Hibiscus hybrid ‘Daewangchun’ had the largest flower size of 16.0cm out of the 127 cultivars. H. syriacus ‘Antong’, ‘Lil Kim’, and ‘Ggoma’ were cultivars with smaller flowers than other cultivars. H. syriacus ‘Hunjang’ had largest red eye, of 5.2cm of length compared to the other cultivars. The cultivars with unique flower color for landscape uses are H. syriacus ‘Kwangmyung’, ‘Nanpa’, ‘North face’, ‘Bulsae’, ‘Bidan’, ‘Songam’, ‘Youngchang’, ‘Jukpeoso’, ‘Kiho’, ‘Tamla’, ‘Hwasoored’ and ‘Hwanhee’. These flowers had a purplish red color and were developed in Korea. H. syriacus ‘Aphrodite’, ‘Dr. Uemoto’, ‘Freedom’, ‘Pink Cup’, ‘PS 80-1’, ‘Purpureus Variegatus’, ‘Red Giant’, ‘Woodbridge’ also had unique flowers with a purplish red color and were introduced from foreign countries. In addition, cultivars with violet pink flowers were H. syriacus ‘Ggoma’, ‘Doturak’, ‘Myungmi’, ‘Byunghwa’, ‘Sancheonyu’, ‘Taehwa’, ‘Hikari-hanagasa’, and ‘Little Kim Violet’. ‘Jongmoo’ and ‘Ruffled Satin’ had flowers with crimson color. Therefore, the new cultivars with unique flower colors were a promising cultivars to a woody landscape plant. Cultivars with large flower sizes were Hibiscus hybrid ‘Daewangchun’, Hibiscus hybrid ‘Daemang’, and Hibiscus hybrid ‘Jina’. H. syriacus ‘Ggoma’, ‘Mibeak’, ‘Antong’, ‘Lil Kim’, and ‘Eunhasu’ had small flower sizes. Cultivars with long red eye were H. syriacus ‘Hunjang’ and H. syriacus ‘Hi Lea Red’. Therefore, the new cultivars, Hibiscus hybrid ‘Daewangchun’, Hibiscus hybrid ‘Daemang’, Hibiscus hybrid ‘Jina’ with large flower sizes, H. syriacus ‘Ggoma’, ‘Mibeak’, ‘Antong’, ‘Lil Kim’, and ‘Eunhasu’ with small flower sizes, H. syriacus ‘Hunjang’ and H. syriacus ‘Hi Lea Red’ with long red eye, were promising cultivars to a woody landscape plant.
경사증착법을 이용한 PM-OLED용 무기박막형 보호층 연구
김광호,김훈,김재경,도이미,한정인,주병권,Kim, Kwang-Ho,Kim, Hoon,Kim, Jae-Kyung,Do, Lee-Mi,Han, Jeong-In,Ju, Byeong-Kwon 한국전기전자재료학회 2003 전기전자재료학회논문지 Vol.16 No.9
In this study, the MgO thin-film passivation layer was adopted to protect passive matrix organic light emitting diode(PMOLED) with the cathode separator from moisture and oxygen. Using the substrate rotate and tilt technique during the deposition, the organic and cathode layers were perfectly covered with MgO. And then, we analyzed the difference of the current-voltage and luminescence characteristics between passivated OLED of the MgO and non-passivated OLED. It was found that the number of dark spot generated from the degradated pixel was decreased owing to the Mgo thin-film passivation layer using the tilt & rotate technique. And the half-life time passivated OLED was improved two times more. Thus, the MgO could be vaccum-deposited under the low temperature and had a merit that the organic layer was not much affected. We can consider that MgO thin film passivation method can be adopted to protect the OLED from moisture and oxygen and can offer the enhancement of lifetime.
김광호,김현태,김정택,선경,Kim, Kwang-Ho,Kim, Hyun-Tae,Kim, Jung-Taek,Sun, Kyung 대한흉부심장혈관외과학회 1998 Journal of Chest Surgery (J Chest Surg) Vol.31 No.5
후측개흉술은 흉근을 절단하는 단점은 있으나 훌륭한 수술시야를 제공하므로 표준개흉술로 이용되고 있다. 이에 반하여 근육보존수직개흉술은 흉근이 보존되며 팔을 내리면 액와부 수술 상흔이 감추어지는 미용상의 장점이 있다. 그러나 수직개흉술은 흉부의 정측면에 절개선이 이루어지므로 측와위에서 수직으로 수술시야를 내려다보게 되어 흉강내의 구조물, 특히 폐문부나 첨부 및 하부의 길이가 멀어져 수술조작이 불편하다. 본 인하대병원 흉부외과에서는 수술조작에 관련된 차이를 알아보고자 후측개흉술(15례)과 수직개흉술(14례)을 이용해 폐쐐기절제술 이상의 수술을 실시한 29례에서 수술과 관련된 임상지표들을 비교관찰한 결과, 수술시간, 수술 1일과 2일의 흉관 배액량, 흉관 거치기간, 수혈 수와 수혈량, 수술 중 실혈량, 수술 후 합병증 등에서 양군간에 차이가 없었다. 이상의 결과를 볼 때 근육보존수직개흉술도 후측개흉술과 마찬가지로 폐절제술시 안전하게 사용될 수 있다고 본다. Although posterolateral thoracotomy(PLT) has been a standard thoracic incision in resection surgery of the lung for surgeons to achieve a good surgical field, there remains concern about severing a group of thoracic muscles remains. Muscle-sparing vertical thoracotomy (MVT) is an alternative to PLT, which gives cosmetic result and may preserve motion of the shoulder girdle as well as respiratory function of the patient in the early postoperative period. However, surgeons tend not to perfer it because of limited surgical field from the vertical wound made on the lateral thoracic wall. The purpose of this study is to compare the surgical outcomes of PLT versus MVT. We retrospectively reviewed 29 patients(15 who had PLT and 14 who had MVT, organized into those two groups) who had undergone lung resection surgery in our institute. There were no clinical differences between the two groups in terms of operation time, estimated amount of blood loss during the operation, amount of chest drainage on the first and the second postoperative day, duration of chest tube placement, incidence and amount of transfusion, and postoperative complications. We conclude that, from our limited experience, MVT can be applied to lung resection surgery as safely as PLT and that it may have a beneficial role for the patient with compromised lung function in addition to cosmetic effect.
경락(經絡)과 정신양생(精神養生)의 관계 설정(設定)에 대(對)한 고찰(考察)
백진웅,김광호,Baek Jin-Woong,Kim Kwang-Ho 대한예방한의학회 2001 대한예방한의학회지 Vol.5 No.2
It is thought that Kim Hong-kyeong followed the existing theory of Meridian(經絡) and supplemented his unique perspectives in interpreting it. And he tried to relate Meridian with hygiene of mind. I took up with the research on the assumption that the review of Kim's method can present new perspectives to the study of relationship between Meridian and hygiene of mind. The results of my study are as follows: 1. Kim followed common theory of Meridian and then added his unique perspectives to it. His method of interpretation has one characteristic. By introducing Idealism(唯心論), he understood 'Meridian' as the path of the mind and the emotion. Especially I think his hypothesis that acupuncture can be widely used in mental diseases as well as body related diseases and its applications to treatment are very valuable. 2. Meridian and hygiene of mind are close together. I think Kim's unique trial is something new in studying relationship between Meridian and hygiene of mind but requires more research on it.
$LiNbO_3$ 강유전체 박막을 이용한 저전압용 MFS 디바이스의 특징
김광호,정순원,김채규,Kim, Kwang-Ho,Jung, Soon-Won,Kim, Chae-Gyu 대한전자공학회 1999 電子工學會論文誌, D Vol.d36 No.11
고온 열처리 시킨 $LiNbO_3/Si$(100) 구조를 이용한 MFS 디바이스를 제작하여 비휘발성 메모리 동작을 확인하였다. 제작한 트랜지스터의 선형영역에서 산출한 전계효과 이동도와 상호 컨덕턴스는 각각 약 $600cm^2/Vs$ 및 0.16mS/mm 이었다. 0.5V의 게이트 전압(즉, read 전압)에서 측정한 드레인 전류의 온/오프 비는 $10^4$배 이상이었다. 분극반전에 사용한 전압은 ${\pm}3V$ 이하로 매우 낮아 이는 저소비전력용 집적회로에 적용시키기에 기대가 된다. 세게 도핑시킨 반도체위에 제작한 MFS 커패시터는 500kHz의 바이폴라 전압펄스(peak-to-peak 6V, 50% duty cycle) 측정으로 $10^{10}$ cycle 까지도 분극의 열화현상이 없는 양호한 특성을 얻었다. Metal-ferroelectric-semiconductor devices by susing rapid thermal annealed $LiNbO_3/Si$(100) structures were fabricated and demonstrated nonvolatile memory operations. The estimated field-effect electron mobility and transconductance on a linear region of the fabricated FET were about $600cm^2/V{\cdot}s$ and 0.16mS/mm, respectively. The ID-VG characteristics of MFSFET's showed a hysteresis loop due to the ferroelectric nature of the $LiNbO_3 films. The drain current of the on state was more than 4 orders of magnitude larger than the off state current at the same read gate voltage of 0.5V, which means the memory operation of the MFSFET. A write voltage as low as ${\pm}3V$, which is applicable to low power integrated circuits, was used for polarization reversal. The ferroelectric capacitors showed no polarization degradation up to $10^{10}$ switching cycles with the application of symmetric bipolar voltage pulse (peak-to-peak 6V, 50% duty cycle) of 500kHz.
김광호,Kim, Kwang-ho 한국개발연구원 2011 韓國 開發 硏究 Vol.33 No.4
본 연구는 풍수해보험사업이 도입 취지와는 달리 여러 문제점을 내포하고 있다는 문제의식하에 풍수해보험에 대한 개념적이고 이론적인 분석을 시도하였다. 우선 현재와 같이 재난지원금과 풍수해보험이 공존하는 상황은 풍수해보험 활성화에 장애로 작용할 것이므로, 풍수해보험을 확대하기 위해서는 재난지원금의 점차적 축소를 고려할 필요가 있다. 또한 풍수해보험의 기본취지 중 하나가 자율적 방재노력을 제고하는 것이나, 풍수해보험은 보험에 따른 도덕적 해이로 인해 오히려 그러한 노력을 저해할 가능성이 높다. 끝으로 현재의 손해방지비용 지원은 그 효과가 불확실하므로 보다 심도 있는 분석이 필요하다. The storm and flood insurance, which was introduced recently to substitute the disaster relief system to moderate government's financial burden and enhance people's effort to reduce damage, seems to suffer various problems. This paper conducts a theoretical analysis on various aspects of the storm and flood insurance to provide insight on those issues and draw policy implications. First, the coexistence of disaster relief with the storm and flood insurance is likely to harm the penetration of the storm and flood insurance. Second, the current premium system is likely to induce people to make less efforts to reduce damage due to moral hazard problem. Third, current support for damage-reducing efforts may not fulfill its purpose and hence should be scrutinized carefully.
지식베이스를 이용한 임베디드용 연속음성인식의 어휘 적용률 개선
김광호,임민규,김지환,Kim, Kwang-Ho,Lim, Min-Kyu,Kim, Ji-Hwan 대한음성학회 2008 말소리 Vol.68 No.-
In this paper, we propose a vocabulary coverage improvement method for embedded continuous speech recognition (CSR) using knowledgebase. A vocabulary in CSR is normally derived from a word frequency list. Therefore, the vocabulary coverage is dependent on a corpus. In the previous research, we presented an improved way of vocabulary generation using part-of-speech (POS) tagged corpus. We analyzed all words paired with 101 among 152 POS tags and decided on a set of words which have to be included in vocabularies of any size. However, for the other 51 POS tags (e.g. nouns, verbs), the vocabulary inclusion of words paired with such POS tags are still based on word frequency counted on a corpus. In this paper, we propose a corpus independent word inclusion method for noun-, verb-, and named entity(NE)-related POS tags using knowledgebase. For noun-related POS tags, we generate synonym groups and analyze their relative importance using Google search. Then, we categorize verbs by lemma and analyze relative importance of each lemma from a pre-analyzed statistic for verbs. We determine the inclusion order of NEs through Google search. The proposed method shows better coverage for the test short message service (SMS) text corpus.
K-약침(藥鍼)의 급성(急性) 아급성(亞急性) 독성실험(毒性實驗) 및 항암효과(항암효과)에 관(關)한 실험적(實驗的) 연구(硏究)
김광호,권기록,Kim, Kwang-Ho,Kwon, Ki-Rok 대한약침학회 2003 Journal of pharmacopuncture Vol.6 No.1
Objectives : The purpose of this study was to investigate Acute$\cdot$Subacute Toxicity and Anti-cancer Effect of K-Herbal-acupuncture in mice and rats. Methods : Balb/c mice were injected intraperitoneally with K-herbal-acupuncture for $LD_{50}$ and acute toxicity test. Sprague-Dawley rats were injected intraperitoneally with K-herbal-acupuncture for subacute toxicity test. K-Herbal-acupuncture was injected on abdomen of mice with S-180 cancer cell line. Result : 1. $LD_{50}$ of K-Herbal-acupuncture was limited $4{\times}10^{-3}$ml/kg~$2{\times}10^{-3}$ml/kg by the test. 2. In acute toxicity test, all of mice were down to the moving reflex, but the weight of mice was increased in treatment group, compared with the normal group. (P<0.05) 3. In acute toxicity test of serum biochemical values of mice, glucose was increased in treatment II group, total cholesterol was increased both treatments.(P<0.05) 4. In subacute toxicity test, the clinical signs of toxication was down to the moving reflex, but it is not severe like acute toxicity test, and observed weight loss at the treatments. 5. In subacute toxicity test, liver weight was decreased compared with the normal group. (P<0.05) 6. In subacute toxicity test of complete blood count test (CBC) of rat, HCT was decreased in treatments, compared with the normal group.(P<0.05) 7. In subacute toxicity test of serum biochemical values of rat, uric acid and triglyceride were decreased, and glucose was increased in treatment groups compared with the control group. (P<0.05) 8. Median survival time was increased about $45\%$ in treatment groups compared with the control group.(P<0.05) 9. Natural killer cell activity was increased in B16F10 lung cancer model, but it was not in sarcoma-180 abdomen cancer. 10. In interleukin-2 productivity test, treatment groups didn't show significant change in lung cancer and abdomen cancer, compared with the normal group.(P<0.005) 11. In making an examination of metastatic cancer with the naked eye, melanoma metastasized in the Lung of C57BL/6 mice. The treated group showed more Melanoma than the control in the numbers and volume. Conclusion : According to the result, K-herbal-acupuncture need further study to know the function and effect in cancer.
Al<sub>2</sub>O<sub>3</sub>/Si/Al<sub>2</sub>O<sub>3</sub>구조를 이용한 실리콘태양전지 제작 및 특성
김광호,Kim, Kwang-Ho 한국반도체디스플레이기술학회 2015 반도체디스플레이기술학회지 Vol.14 No.4
Using a combined CVD and ALD equipment system, multi-layer quantum well structures of $Al_2O_3/a-Si/Al_2O_3$ were fabricated on silicon Schottky junction devices and implemented to quantum well solar cells, in which the 1~1.5 nm thicknesses of the aluminum oxide films and the a-Si thin film layers were deposited at $300^{\circ}C$ and $450^{\circ}C$, respectively. Fabricated solar cell was operated by tunneling phenomena through the inserted quantum well structure being generated electrons on the silicon surface. Efficiency of the fabricated solar cell inserted with multi-quantum well of 41 layers has been increased by about 10 times that of the solar cell of pure Schottky junction solar cell.