탄산아파타이트로 된 인공골과 소뼈에서 유래한 무기질 골의 초기 골전도에 대한 연구

김도균,조태형,송윤미,판휘,이수연,진임건,김인숙,홍국선,황순정,Kim, Do-Kyun,Cho, Tae-Hyung,Song, Yun-Mi,Pan, Hui,Lee, Su-Yeon,Jin, Im-Geon,Kim, In-Sook,Hong, Kug-Sun,Hwang, Soon-Jung 대한악안면성형재건외과학회 2007 Maxillofacial Plastic Reconstructive Surgery Vol.29 No.6

Introduction: Although several types of calcium-phosphate coumpound have been frequently applied to osseous defects at maxillofacial area for many years, there is a controversy about its efficiency on bone conductivity comprared to xenograft bone substitute. Alloplastic carbonapatite has been introduced to improve disadvantages of hydroxyapatite and to mimic natural bone containing carbon elements. However, a preclinical study about its efficiency of osteoconductivity has not been reported. This study was performed to evaluate the early osteoconductive potential of synthetic carbonapatite with multiple pores relative to anorganic bovine xenograft. Materials and methods: Total 5 beagle dogs were used for maxillary augmentation model. The control (anorganic bovine xenograft) and experimental groups (synthetic carbonapatite) were randomly distributed in the mouth split design. After bone graft, all animals were sacrificed 4 weeks after surgery. Histological specimens with Masson Trichrome staining were made and histomorphometrically analysed with image analyser. The statistical analysis was performed using paired t-test. Results: In both groups, all animals had no complications. The experimental group showed relatively much new bone formation around and along the bone substitutes, whereas it was clearly reduced in the control group. The ratios of new bone area to total area, to material area and to the residual area excluding materials were higher in the experimental group ($0.13{\pm}0.03,\;0.40{\pm}0.13,\;0.20{\pm}0.06$ respectively) than in the control group ($0.01{\pm}0.01,\;0.03{\pm}0.02,\;0.03{\pm}0.03$, respectively). And the differences between both groups were statistically significant (p<0.001, <0.01, <0.01, respectively), while the ratio of material area to total area in two groups was not significant. Conclusion: Carbonapatite showed a high osteoconductivity in the early stage of bone healing compared to bovine derived anorganic bone substitute. This study suggests that this bone materials can be applied as a reliable bone substitute in the clinical treatment.

드럼형 마찰대전장치를 이용한 혼합플라스틱의 정전선별

김도균,조희찬,전호석,Kim Do Kyun,Cho Hee Chan,Jeon Ho Seok 한국자원리싸이클링학회 2004 資源 리싸이클링 Vol.13 No.1

마찰대전을 이용한 정전분리는 서로 상이한 물질간의 마찰을 통해 서로 다른 극성으로 하전시켜 이를 전기장내에 통과시켜 분리하는 기술이며, 플라스틱과 같은 부도체입자들의 정전분리에 많이 사용된다. 본 연구에서는 연속식 드럼형 마찰대전장치를 개발하고 이를 폐건축 및 폐가전 플라스틱의분리에 적용시켰다 분리대상 플라스틱은 폐건축 자재의 경우 PE/PVC 혼합시료를 대상으로 하였으며, 폐가전의 경우 ABS/PS/PP의 혼합시료를 대상으로 하였다. 건축자재 혼합플라스틱 및 가전제품 혼합플라스틱 모두 드럼형 마찰대전장치를 이용할 경우 실험한 조건에서 무게기준으로 95%이상의 순도조건에서 95%이상의 회수율을 보였다. Triboelectrostatic separation process is a technology that different particles charged after contact and rubbing different materials are separated in a high electric field. This technology has an advantage in that it can be used for separating non-conducting materials such as plastics unlike other electrostatic separation processes. There are two objectives in this study. One is to develop an effective continuous tribo-electrostatic separation process. The other is to apply the developed device for the separation of mixed plastics. Results show that almost all tested plastics reaches over 95% in yield and grade after separation.

부착면 표면물질에 의한 성능 왜곡을 최소화한 이중 선로의 비대칭 다이폴 형태 태그 안테나 설계

김도균,추호성,Kim, Do-Kyun,Choo, Ho-Sung 한국전자파학회 2007 한국전자파학회논문지 Vol.18 No.4

본 논문에서는 부착될 물질이 가지는 전기적 특성에 의한 성능 변화가 적은 이중 선로의 비대칭 다이폴 형태 RFID 용도 태그 안테나(Asymmetric Dual-arm Dipole Antenna: ADDA)를 제안하였다. 제안된 태그 안테나는 상용 의료 폐기물 수거용 플라스틱 밀폐 용기(${\varepsilon}_r=1.7,\;tan\;{\delta}=0.002$)에 부착하여도 안테나의 동작 특성 변화가 적도록 설계되었다. 안테나의 세부적인 설계변수는 자유공간과 인식 대상 물체에 부착시 우수한 인식거리 성능을 나타내도록 Pareto 유전자 알고리즘을 사용하여 최적화하였다. 최적화 태그 안테나는 $100\;mm{\times}50\;mm$의 크기를 가지며, 3.7 %의 반사 손실 대역폭($S_{11}$< -10 dB)을 가지고 80 %의 복사효율을 나타내었다. 인식 거리 측정 결과, 자유공간에서 정면 방향(broadside) 5.3 m, 의료 폐기물 수거용 플라스틱 밀폐 용기에 부착시 최대 5.5 m의 인식거리 성능을 가지는 것을 확인하였다. In this paper we proposed the tag antenna with a low performance distortion from an attached surface material using the asymmetric dual-arm dipole antenna(ADDA) structure. The tag is designed to exhibit low performance changes when the tag is attached on a target object(the medical litter receptacle, ${\varepsilon}_r=1.7,\;tan\;{\delta}=0.002$). Detail design parameters for the proposed antenna are optimized to maintain a good readable range in free-space as well as on a target object. The size of the optimized antenna is $100\;mm{\times}50\;mm$. The antenna shows the matching bandwidth($S_{11}$< -10 dB) of 3.7 % and the radiation efficiency of 80 % at the operating frequency. Finally we confirmed the readable range of the tag antenna by measurement and it shows about 5.3 m in free space and 5.5 m on the target object.

포화지방산계 LB 막의 수평방향에 대한 전기적 특성 비교

김도균,최용성,장정수,권영수 ( Do Kyun Kim,Yong Sung Choi,Jeong Soo Chang,Young Soo Kwon ) 한국전기전자재료학회 1997 한국전기전자재료학회 춘계학술대회논문집 Vol.1997 No.0

적혈구 침강속도에 대한 Westergren tube 각도, 온도 및 NaCl 농도가 미치는 영향

김도균,김영홍,유창준,Kim, Do-kyun,Kim, Young-hong,Yu, Chang-jun 대한수의학회 1996 大韓獸醫學會誌 Vol.36 No.1

Erythrocyte sedimentation rate is influenced by plasma protein, red cell itself and physiological conditions and it is clear that the measurement of erythrocyte sedimentation rate varies with technique and various environmental factors. The effect of temperature, angle of test tube, and osmobility with different percent of NaCl solution on erythrocyte sedimentation rate on sheep was determined by modified Westergren method. In sheep, as the angle of Westergren tube was decreased from $90^{\circ}$ to $45^{\circ}$, erythrocyte sedimentation rate was increased in both diluted plasma and NaCl solutions. As temperature was increased from $4^{\circ}C$ to $20^{\circ}C$ at $45^{\circ}$ angle. erythrocyte sedimentation rate was increased. In ruminants, this modified Westergren methods, erythrocyte 1 : plasma 9 instead of erythrocyte 4 : plasma 6(whole blood), enable them to have meanings as dog therefor, using this method, clinical can determine the erythrocyte sedimentation rate of ruminants for diagnosis. Because erythrocyte sedimentation rate was changed according to the angle of Westergren tube, temperature as erythrocyte diluted with NaCl, this study detected that the change of temperature, the angle of Westergren tube could change erythrocyte sedimentation rate by effecting red cell itself. The increase of osmobility owing to change of NaCl percent resulted in the decrease of rapid erythrocyte sedimentation rate. So this fact indicate that deformibility and the change of red cell volume have meaning in the change of erythrocyte sedimentation rate.

스포츠 OTT 플랫폼 서비스의 이용동기가 이용만족도 및 지속이용의도에 미치는 영향

김도균(Kim, Do-Kyun),황동규(Hwang, Dong-Kyu) 한국체육과학회 2023 한국체육과학회지 Vol.32 No.3

The purpose of this study was to investigate the relationship between Sport OTT platform service motivation user satisfaction and continuous use intention. Toward this end, utilizing sports OTT platform services were selected as a study population. A total of 250 users was conveniently selected and responded to online survey. 232 usable data were utilized in data analyses. The collected data were analyzed using frequency analysis, exploratory factor analysis, reliability analysis, correlation analysis, multiple regression analysis with SPSS 28.0. The results of this study were as follows. Firstly, the motivation for sports OTT platform services (information, diversity, interactivity, usefulness) have a significant impact on satisfaction. Second, the motivation for sports OTT platform services (information, diversity, interactivity, usefulness) have a significant impact on the intention to continue using the service. Discussions and additional implications were suggested as well.

허베이 스피리트호 기름유출사고에 의한 섬 주민들의 삶의 변화

김도균(Do-Kyun Kim),이정림(Jung-Rim Lee) 한국환경사회학회 2008 환경사회학연구 ECO Vol.12 No.2

이 연구의 목적은 2007년 12월 7일 태안군 만리포 해상에서 발생한 허베이 스피리트호(Hebei Spirit, 146,848톤)기름유출사고가 가의도 주민들에게 미친 사회적 영향을 파악하는 데 있다. 가의도는 육지와 연결되지 않은 태안군의 유일한 유인도이며 주민들이 생업활동을 바다환경에 전적으로 의존하고 있는 섬마을이다. 기름유출 사고로 인해 주민들의 주 소득원인 어업과 관광업이 완전히 중단되었으며, 현재 유일한 소득원인 방제인건비마저 제대로 지급되지 않아 극심한 생활고를 호소하고 있었다. 그뿐만 아니라 사고로 인한 정신적 충격과 과도한 방제작업, 미래에 대한 불안감과 소외의식으로 인해 육체적ㆍ정신적 고통을 겪고 있었다. 하지만 높은 직업적 동질성과 공동체적 유대감으로 주민들 사이에 특별한 갈등이 발생하진 않았다. 다만 육체와 정신의 피로로 인해 사고이전 활발했던 이웃 간의 일상적 교류가 감소한 것으로 나타났다. 이 연구를 통해 기름유출사고의 사회적 영향이 어촌공동체의 사회구조에 어떻게 반영되는지를 살펴보고자 하였다. 그러나 이 둘 사이의 관계를 보다 명확히 하기 위해서는 다양한 구조를 갖는 마을 간 비교연구를 통해서 보완될 필요가 있다. This study aims to discover the social impact of an oil spill accident by the Herbei Spirit (146,848 tons), which happened on the Mallipo Sea, Taean-gun on December 7, 2007, on residents in Gaeui-do(island). Gaeui-do(island) is a sale manned-island which is not landfast in Tacan-gun, and is an island village where the occupational activity of residents is closely tied to me marine environment. Therefore, me oil spill accident brought about a negative social impact on the economic activity of the residents, the residents' relationships, and their health. The fishery and tourism industry, which were the main income sources of the residents, came to a full stop due to the oil spill accident, and the residents haw complained about the rigors of life because of me non-payment of labor for the clean-up and living expenses. On top of that, the shock from the accident, excessive clean-up labor relative to the age group of the residents, and the sense of isolation as well as their anxiety about me future caused the residents to go through both physical and mental suffering. Furthermore, physical and mental exhaustion from clean-up labor reduced mutual visits between neighbors, which had been active before the accident, and this was shown as a loss of ordinary joy for the residents. However, there was no specific conflict between the residents thanks to the higher homogeneity in their jobs within an island village and the unique solidarity of the community. This study intended to look into how the social impact of the oil spill accident affected the social structure of the community of a small-scale fishing village microscopically. Nevertheless, it is necessary to follow-up this study through comparative research into villages with various social structure in order to more clearly prove the relationship between the characteristics of a village community and such a social impact.

중범 김동희 교수 정년 기념호 : 논문 ; 북한 법체계에서의 법개념론과 법치(法治)론에 관한 고찰

김도균 ( Do Kyun Kim ) 서울대학교 법학연구소 2005 서울대학교 法學 Vol.46 No.1

어촌마을의 사회자본과 어촌계

김도균(Do Kyun Kim) 한국농촌사회학회 2010 農村社會 Vol.20 No.1

본 연구의 목적은 농촌마을과 다른 어촌마을의 사회자본 축적 조건을 밝히는 것이다. 이를 위해 3개의 어촌마을을 비교 연구하였다. 경제적 보상수준이 높고 외부집단과의 경계가 명확한 폐쇄형 연결망을 갖는 집단 혹은 조직이 사회자본 축적에 유리한 조건을 제공한다는 선행 연구들의 결과를 받아 드린다면 어촌마을 사회자본의 축적에 있어 어촌계가 중요한 변수로 작용한다. 연구 결과에 의하면 마을어장의 경제적 가치가 높아 어촌계에 대한 주민들의 경제적 의존도가 높고 어촌계원과 주민들 간의 인적 통합 수준이 높은 마을일수록 사회자본 축적에 유리하였다. 즉 마을공동체와 어촌계간의 인적·경제적 통합수준이 높은 어촌마을의 사회자본 축적수준이 높았다. 그러나 단순히 어촌계의 경제적 보상과 같은 도구적 특징이나 폐쇄성이 사회자본 축적에 유리한 조건을 제공한 것은 아니다. 보다 중요한 것은 어촌계의 운영 방향이 경제적 효율성에만 매몰 되지 않고, 어촌계의 공유자원인 마을어장에 대한 평등한 접근과 분배를 통하여 구성원들의 결속력과 신뢰를 증진시켰다는 점이다. 폴라니(Polanyi) 식으로 표현하자면 어촌계의 경제적 행위가 비경제적 목표를 포함한 보다 넓은 범위의 사회적 관계 안에서 이루어진다. 즉 어촌계는 공유자원의 호혜적 분배와 재분배를 통하여 시장경제체제 하에서 취약계층일 수밖에 없는 영세 어민들을 보호함으로써 사회자본을 축적시킨다. The study aims to identify necessary conditions for accumulating social capital uniquely for fishing villages, different from that for farming villages. With this aim, the study conducted comparative research into three fishing villages. Provided that the research result, which a group or an organization that has a high level of economic compensation and has a closed network of which the border is clear from outside groups, is accepted, fishing village cooperatives may be an essential variable in the accumulation of social capital for fishing villages. According to the research results, the higher the economic dependency of residents on fishing village cooperatives was due to the high economic value of village fishing grounds and the higher the level of the integration of human resources between fishing village cooperatives members and residents, was in a village, the more advantageous it was for accumulating social capital. That is, the level of accumulating social capital in a fishing village, of which the level of integration of human resources and economy between a village community and fishing village cooperatives is high, is also high. However, it does not mean that only the economic compensation of fishing village cooperatives, namely an instrumental characteristic, furnished advantageous conditions for the accumulation of social capital. More importantly, the direction of the operation of fishing village cooperatives makes a commitment to the economic stabilization of its members through an equitable approach and distribution regarding a village fishing ground, which is a common-pool resource, without being solely focused on economic efficiency. When putting it in the way of Polanyi, the economic activity of fishing village cooperatives has been performed within a social relationship in a broader range involving a non-economic goal. In other words, fishing village cooperatives accumulate social capital by protecting destitute fishermen who have no choice but to become a vulnerable class in the market economy system, through the mutually beneficial distribution and redistribution of shared resources.

아토피성 천식 환아에서 메타콜린과 아데노신 기관지 유발 검사: 혈중 호산구염증 지표와의 관련성

김도균 ( Do Kyun Kim ),최선희 ( Sun Hee Choi ),유진호 ( Jin Ho Yu ),유영 ( Young Yoo ),고영률 ( Young Yul Koh ) 대한천식알레르기학회 2006 천식 및 알레르기 Vol.26 No.1

Background: Bronchial hyperresponsiveness (BHR) in asthma is thought to be a consequence of underlying airway inflammation. Objective: The aim of this study was to assess the relationship between blood eosinophil inflammatory markers and bronchial responsiveness to both methacholine and adenosine 5`-monophosphate (AMP) in atopic children with mild to moderate asthma. Method: Ninety-eight atopic children with mild to moderate asthma were included. Methacholine, and AMP bronchial challenges were performed, and blood eosinophil count and serum eosinophil cationic protein (ECP) level were measured. Correlations between PC20 to both broncho-constrictor agents and blood eosinophil count or serum ECP levels were assessed. Result: Ninety-five (95.9%) and 92 (93.9%) of 98 subjects showed hyperreactivity to methacholine (PC20<16 mg/mL) and AMP (PC20<200 mg/mL), respectively. There was a significant association between methacholine PC20 and AMP PC20 (r=0.506, P<0.001). AMP PC20 was significantly correlated with blood eosinophil count and serum ECP level (r=-0.386, P<0.001; r=-0.246, P<0.05, respectively). However, this significant association was not found between methatholine PC20 and blood eosinophil count or serum ECP level. Multiple linear regression analysis revealed that only the blood eosinophil count was significantly associated with AMP PC20. Conclusion: AMP PC20 seems to be more closely related to serum eosinophilic inflammatory markers than methacholine PC20. This result suggests that AMP PC20 is a very useful tool for evaluating eosinophilic inflammation in atopic asthma children. (Korean J Asthma Allergy Clin Immunol 2006;26:52-58)