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.

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.

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

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.

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.

한국의 재분배 정치의 역사적 기원

김도균 ( Do Kyun Kim ) 한국사회사학회 2013 사회와 역사 Vol.0 No.98

이 글은 산업화 시기 한국의 재분배 정치가 사회정책보다는 조세정책과 저축장 려정책을 중심으로 전개되어 왔다고 주장한다. 지금까지 한국 복지국가 연구들은 주로 정당성 확보 수단으로서의 사회정책 등의 변수를 강조해 왔다. 하지만 이러한 접근들은 모두 국가의 사회정책이라는 측면만을 강조한 나머지 한국의 분배갈등과 재분배 정치의 독특성을 간과해 왔다. 반면 이 글은 산업화 시기 권위주의 체재 하에서 국가의 과세역량의 제약, 고리고 이를 만회하기 위한 수단으로 정책금융의 활용이 한국사회에서 매우 독특한 재분배 정치의 경로를 형성하게 되었음을 지적 한다. 첫째, 국가의 정치적 정당성이 부재하고 공적 사회지출이 억제되는 상황에서 국가의 증세정책에는 한계가 있었으며, 오히려 근로소득세 면세점 제도를 통한 소득세 부담의 완화가 일종의 소득보장수안으로 활용된다. 둘째, 금융통제 하에서 정책금융이 국가의 재정부담을 완화하는 수단으로 중요하게 활용됨에 따라‘근로자재형저축제도’와 같은 소득보장적 성격이 강한 저축장려정책이 도입된다. 결론적으로, 이 글은 산업화 시기 권위주의 국가의 조세정책과 저축장려정책의 결과, 한국의 재분배 정치가 사회정책을 중심으로 한 공적복지보다는 낮은 소득세부담과 민간복지를 중심으로 발전하게 되었으며, 이러한 초기의 경로형성이 민주화 이후 재분배 정치에도 강한 경로의존성을 형성하세 되었다고 주장한다. This paper argues that the re-distributional politics in Korea has gone through tax policy and savings encouragement policy rather than social policies in the industrial era. To date, researches in the Korean welfare state mainly emphasized that social policies in Korea has been used to gain political legitimacy. However, as these approaches only focus on social policies, they ignore the uniqueness of distributional conflicts and re-distributional politics in Korea. On the other hand, the paper points out that both constraints on tax capacity and policy loan as an alternative fiscal measure in the authoritarian state made very unique path about the re-distributional politics in Korea. Firstly, the state’s tax increasing policy was limited in the circumstances that the state was lack of the political legitimacy and suppressed the public welfare expenditure as much as possible and, if anything, the mitigation of the income tax burden through the earned income tax exemption system was taken advantage of as a sort of income support measure. Secondly, as the policy loan could be importantly used as an alternative of public finance under the state’s financial control, ‘worker’s asset-building savings plan’ with the strong character of income support was introduced to encourage household saving. In result, the paper argues that the re-distributional politics in Korea has been unfolded around the low income tax burden and the private welfare rather than the public welfare and social policy, and this path-making under the authoritarian state made strong path-dependence for the re-distributional politics even after the democratization.

딥러닝을 활용한 공병 자동 환급 시스템

김도균(Do-Kyun Kim),김창근(Chang-Geun Kim),전주성(Ju-Sung Jeon),신성한(Sung-Han Shin),정영석(Young-Seok Jung) 한국컴퓨터정보학회 2024 한국컴퓨터정보학회 학술발표논문집 Vol.32 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)

대학생들의 정치적 이념과 환경의식

김도균(Do-Kyun Kim) 한국환경사회학회 2012 환경사회학연구 ECO Vol.16 No.2

본 연구는 대학생들의 정치적 이념과 환경의식 간의 관계를 밝혀보려는 경험적인 연구이다. 이를 위해 대전지역 대학생 480명의 설문조사 자료를 분석하였다. 독립변수인 정치적 이념변수로는 전통적인 이념구분 방식인 좌파와 우파, 진보정당과 보수정당 지지와 함께 후기산업사회의 특징적인 가치변동인 탈물질주의 가치를 사용하였다. 그리고 종속변수인 환경의식은 언론보도를 통해 대중들에게 널리 알려진 5개의 환경문제(동물실험, 기후변화, 원자력 발전, 4대강 사업, 제주도 강정마을 해군기지 건설)을 통해 파악하였다. 분석결과, 일반적으로 좌파가 우파보다, 진보정당 지지자가 보수정당 지지자보다, 탈물질주의자가 물질주의자보다 각각의 환경쟁점에 대해 친환경적인 태도를 보였다. 그런데 안보논리를 내세워 추진되고 있는 강정마을 해군기지의 경우에는 좌파/우파, 진보정당/보수정당 지지자들의 경계를 넘어 응답자 모두에게서 반환경적인 선택이 광범위하게 나타났다. 다만, 탈물질주의자만이 뚜렷하게 친환경적 태도를 보였다. 국토개발논리를 내세워 추진된 4대강 사업의 경우에는 좌파/우파, 진보정당/보수정당 지지자, 물질주의/탈물질주의자 모두에게서 반대의견이 높았던 것과는 다르게 안보논리 앞에서는 좌파 및 진보정당 지지자들이 탈물질주의자들보다 더 취약한 것으로 드러났다. 따라서 본 연구의 결과만 놓고 본다면, 좌파의 평등주의보다 자아표현과 삶의 질을 강조하는 탈물질주의 가치가 환경의식의 정치적 기반으로 더 설명력이 높다고 할 수 있다. 또한, 개발논리보다는 안보논리가 대학생들의 환경의식 성장을 가로막고 있었다. This is an empirical study to figure out the relationship between undergraduates’ political ideology and environmental concerns. To attain the goal, this paper analyzed survey data from 480 undergraduates in Daejeon. As the variable of political ideology, the independent variable, this study used post-materialistic value, the characteristic value fluctuation of post-industrial society, as well as support for the left and the right, and the progressive party and conservative party, the conventional division of ideology. Also, regarding the dependent variable of environmental concerns, this article used five environmental problems(animal experiment, climatic change, nuclear power development, the Four-River Restoration Project, and Jeju Gangjeong Village naval base construction) widely known to the public through press reports for understanding. According to the result of the analysis, the left, progressive party supporters, and post-materialists showed higher eco-friendly attitudes than the right, conservative party supporters, and materialists regarding each of the environmental issues. However, with regard to the Gangjeong Village Naval Base being promoted with the logic of security, most of the respondents including the left/the right or progressive /conservative party supporters chose anti-environmental options. However, post-materialists showed clear eco-friendly attitudes exceptionally. Regarding the Four-River Restoration Project promoted with the logic of national land development, most of them including the left/the right, progressive /conservative party supporters, or materialists/post-materialists expressed objections; however, before the logic of security, the left and progressive party supporters were weaker than post-materialists. Only by the result of this paper, we can conclude that security logic blocks the growth of environmental concerns in undergraduates more than developmental logic.