숲에 멈추다 외 3편

김동헌(金東憲) 고요아침 2007 열린시학 Vol.12 No.1

고용보험제도의 개혁 방향

김동헌(金東憲),허재준(許栽準) 한국정부학회 2018 한국행정논집 Vol.30 No.1

본고는 우리나라의 일차적 실업자 사회안전망인 고용보험의 사각지대를 미적용 사각지대와 미가입 사각지대로 나누어 식별하고 이를 최소화하는 개혁 방향에 대해 논의한다. 미적용 사각지대의 해소를 위해서는 시간제 근로자 고용보험 적용, 고용형태 다양화에 대응할 수 있는 노동규범 확립 등 제도의 포괄범위를 확대하는 방향으로의 제도 개편이 요구된다. 미가입 사각지대 해소는 사회보험료 징수방식과 긴밀히 연결되어 있다. 사회보험료 납부를 소득신고와 연계할 필요가 있고, 따라서 보험료 적용 · 부과 · 징수를 국세청으로 일원화하는 방식으로 개선하는 것이 미가입 사각지대 해소의 핵심이다. 고용보험 사각지대를 해소하려는 정책적 노력에도 불구하고 불가피하게 발생하는 사각지대에 대해서는 별도의 정책으로 대응하여야 할 것이다. 실업자 사회안전망 강화를 위한 제도 개편과 함께 장기적인 시각에서 고용서비스 전달체계의 확대 또한 병행해서 추진하여야 할 중대한 정책과제이다.

노년의 대퇴골 원위부 골절 시 동시에 시행한 전슬관절 성형술 및 금속판 내고정술 : 8예 보고 Report of Eight Cases

김동헌,장병춘,신규철,양준호 건국대학교 의과학연구소 1999 건국의과학학술지 Vol.9 No.-

Supracondylar fracture of the femur can be treated by a wide variety of methods. Although satisfactory results have been achieved with either open and closed treatment, less certain results are obtained for the elderly who have pre-existing osteoarthritis and osteoporosis. Particularly, elderly patients who have preexisting osteoarthritis are at increased risk of posttraumatic arthritis, stiff knee, persistent pain. Primary total knee arthroplasty(TKA) might obviate many of these potential problems and help to return the high-risk patient to an ambulatory functional status immediately. There are few reports about this study. The purpose of this study is to evaluate the results treated by simultaneous internal fixation and TKA for the supracondylar fracture in the elderly who have osteoarthritis of the knee joint. From 1994 to 1998, eight primary TKAs using posterior cruciate sparing PFC knee(Press Fit Condylar, Johnson & Johnson, Raynham, U.S.A) were performed after internal fixation for the supracondylar fracture of the femur with Judet plate or condylar buttress plate by conventional means. Patella was not resurfaced in all knees. According to the M ller classification of the supracondylar fracture of the femur 5 fractures were type A, 2 in type B, 1 in type C. Five patients were female, 3 patients were male. The ages ranged from 66 to 81, with an average of 74 years. Patients were followed for at least 1 year(average 3 years). The mean interval between the injury and operation was 2 weeks(range, 1 week to 4 weeks). Active knee joint exercise was encouraged in a hinge brace under the postoperative pain control. Partial weight bearing was permitted at the postoperative 4 to 6 weeks using crutches. Full weight bearing was allowed after union of the fracture. Fractures were united in all patients and the average duration of bony union was 16 weeks. The average amount of flexion and average flexion contracture for the all patients at the most recent follow-up were 96 degrees (range, 45 to 120 degrees) and 7 degrees (range, zero to 20 degrees), respectively. Using the knee rating score advocated by the American Knee Society, the average postoperative score was 87 for pain and 80 for function. We concluded that simultaneous internal fixation and TKA for supracondylar fracture of the femur in elderly patients who have advanced knee osteoarthritis may provide satisfactory pain relief and function with acceptable morbidity.

석탄 산처리에 따른 연료의 표면 물성 변화와 직접탄소 이용 연료전지 성능 간의 상관관계 분석

김동헌(Dong Heon Kim),엄성용(Seong Yong Eom),최경민(Gyung Min Choi),김덕줄(Duck Jool Kim) 대한기계학회 2016 大韓機械學會論文集B Vol.40 No.11

본 논문에서는 역청탄인 Glencore 탄을 염산과 질산수용액을 이용하여 산 처리하고 원탄과 산 처리 된 석탄의 물리, 화학적 비교분석과 직접탄소 이용 연료전지(Direct Carbon Fuel Cell, DCFC)의 성능비교 분석을 수행하였다. 석탄의 물성들을 분석하기 위해 열중량 분석과 가스 흡착법, X선 광전자 분광법을 수행하였다. 열중량 분석을 통해 연료의 열적 반응성이 증가하였음을 알 수 있었고, 가스 흡착법 결과로 기공의 평균지름은 변화가 없었지만 표면적은 감소함을 알 수 있었다. X선 광전자 분광법에서는 HNO₃ 처리의 경우 가장 높은 산소/탄소 비율을 보였고, 이를 통해 다양한 표면 산소작용기가 증가한 것을 확인하였다. 연료의 표면 물성과 전기화학 성능을 비교한 결과, 표면의 산소 성분의 변화가 DCFC의 성능 향상에 가장 큰 영향을 미침을 알 수 있었다. Coal modified by acid treatment was investigated to analyze the correlation between the cell performance and electrochemical parameters in a direct carbon fuel cell (DCFC). The fuels were subjected to thermogravimetry analysis, gas adsorption test, and X-ray photoelectron spectroscopy to investigate the fuel properties and surface characteristics. After the treatment of raw coal, the thermal reactivity of the treated fuels increased, and the specific surface area decreased, though the mean pore diameters of three fuels were similar. The coal treated by HNO₃ showed the highest ratio of oxygen to carbon, and also an increase in the surface oxygen groups on the fuel surface. Through comparison between the fuel surface properties and electrochemical performance, it was confirmed that the surface oxygen groups have an influence on the improvement in the DCFC performance.

관절 내시경술에 의한 퇴행성 슬관절염의 치료

김동헌,장병춘,신규철,이재성 건국대학교 의과학연구소 1999 건국의과학학술지 Vol.9 No.-

The arthroscopic surgery is an increasingly accepted procedure for the treatment of symptomatic arthritic knee. Authors reviewed the operative results of arthroscopic surgery in 35 knee joints of 27 patients from 1993 to 1997. 1. The average age of patients was 64 years old and the primary diagnosis was degenerative osteoarthritis in all patients. 2. Preoperative symptomes and signs were pain(98%), tenderness(85%), swelling(85%), decreased range of motion(71%) and effusion(55%). 3. The operative procedures were irrigation and synovectomy(20%), abrasion arthroplasty(57%), partial menisectomy and abrasion arthroplasty(23%). 4. The symptoms and signs were improved postoperatively: according to Nine point scale, the good results were recorded at postoperative 6 months and follow-up 2 years in nearly all patients. 5. The complications were minimal. Authors concluded that arthroscopic surgery is considered as a reliable method in the treatment of degenerative osteoarthritis of the knee but not as a curable method, needing a long term observation.

코발트 염을 이용한 금어초 절화의 수확 후 굴지성 반응 억제

김동헌,정진,김용삼,손은규 한국농화학회 1999 Applied Biological Chemistry (Appl Biol Chem) Vol.42 No.4

It was previously reported that cobalt(II) effectively suppresses the postharvest gravitropic response of snapdragon (Antirrhinum majus L.) (Kim et al. (1997) Agric. Chem. and Biotechnol. 40, 567-571). In this study, several factors affecting the suppression of the gravitropic response by cobalt ion were examined. When flower stalks of snapdragon were pretreated with several different cobalt salts, cobalt nitrate turned out to be the most effective not only in reducing the response but also in preserving the flower quality. We also tested the effects of various detergents which were added to cobalt(II) solution, finding that Tween-40 was the best among the tested with respect to the effectiveness as well as the flower quality. Based on these results, we optimized a protocol for the chemical treatment; that is, a suppressor solution containing 10 mM Co(NO₃)₂ and 0.05% Tween-40 was directly sprayed on the gravitropically sensitive region of cut flowers of snapdragon. The suppressor treatment gave rise to a significantly improved results when the flower stalks were stored at a lower temperature after the chemical treatment.

간외 담관암

김동헌 부산대학교 병원 암연구소 2000 부산대병원학술지 Vol.- No.7

청열공식도절제후 문합방법에 따른 문합부 협착의 빈도에 관한 연구

김동헌 부산대학교 병원 암연구소 2007 부산대병원학술지 Vol.- No.21

Purpose: The objective of this study is to compare hand-sewn and stapled method in esophagogastric anastomosis. Subject and Methods: We retrospectively reviewed a series of 37 patients who underwent transhiatal esophagectomy because of lower esophageal cancer and esophagogastric junction cancer in our hospital. We used silk 4-0 for hand-sewn anastomosis and EEA #25 for stapled anastomosis. We especially reviewed clinical date and the rate of anastomotic stricture and leakage from January, 1996 to December, 2005. Results: Hand-sewn anastomosis was used in 23 patients and stapled anastomosis was used in 14 patients. The incidence of stricture in anastomosis site was found one (4.3%) patients in hand-sewn anastomosis group and four (28.6%) patients in stapled anastomosis group. Less anastomotic stricture occurred in the hand-sewn anastomosis than in the stapled anastomosis (P=0.0004). No significant differences were found in the other clinical analysis between the two groups. Conclusion: Hand-sewn anastomosis showed less stricture rates. Hand-sewn method is safer and more effective for esophagogastric anastomosis than stapled method.

진주시 수돗물 불소농도조정사업의 11년간 비용편익 분석

김만경 ( Man Kyong Kim ),정지인 ( Ji In Jung ),김민지 ( Min Ji Kim ),전은주 ( Eun Joo Jun ),김한나 ( Han Na Kim ),김세연 ( Se Yeon Kim ),한동헌 ( Dong Hun Han ),정승화 ( Seung Hwa Jeong ),김진범 ( Jin Bom Kim ) 대한예방치과·구강보건학회 2014 大韓口腔保健學會誌 Vol.38 No.2

Objectives: The aim of this study was to estimate the economic costs and benefits of a water fluoridation program in the city of Jinju, Korea. Methods: In 2009, dental surveys were conducted on 2,315 children aged 6-12 years in Jinju, which had been fluoridated for 11 years. The decayed/missing/filled teeth (DMFT) scores of children in Jinju were compared to the DMFT scores of same-aged children in non-fluoridated small- and mediumsized cities in the fourth Korean National Health and Nutrition Examination Survey conducted from 2007 to 2009 by the Korea Centers for Disease Control and Prevention. The reduced number of decayed permanent teeth by the water fluoridation program was estimated as the difference between the DMFT scores of children in Jinju and those in non-fluoridated small- and medium-sized cities. The economic benefits were estimated by the savings from reduced dental treatment costs by using the reduced number of decayed permanent teeth from the water fluoridation program. All annual costs and benefits were calculated from 1998 to 2009. The social rate and untreated rate of decayed teeth were applied as 3% and 20%, respectively. The annual benefit-cost ratio was estimated by using the annual benefits and cumulative program costs. Results: The economic benefit in 2009 from a water fluoridation program was estimated as 57,496,000,000 Korean Won (KRW), and the cumulative cost in 2009 was estimated as 1,387,000,000 KRW. The net present value in 2009 from a water fluoridation program was 56,109,000,000 KRW. The benefit-cost ratio in 2009 was estimated as 41.4. Conclusions: The economic benefit of a water fluoridation program in Jinju city was evaluated as excellent.

Risk Premium, Liquidity Premium, and Expectations Hypothesis in the Treasury Bill Market

김동헌 한국계량경제학회 2008 계량경제학보 Vol.19 No.2

This paper examines whether the risk premium and the liquidity premium play an important role in explaining excess holding period return and whether two components can explain the empirical failure of expectations hypothesis. The paper finds from the study of U.S. Treasury Bill rates that the risk premium and the liquidity premium are important in explaining excess holding period return. However, the expectations hypothesis is not salvaged under the maintained hypothesis concerning the liquidity premium and risk premium although two premiums improve the forecastability of yield spread. The paper attributes the results to the possibility that the difference between the relative bid-ask spread of T-bill rates is not accurate measure for the time-varying liquidity.