적색안료인 α-Fe₂O₃와 투명 유전체의 반응

김봉철,한용수,송윤호,서경수,이진호,이남양,박이순,이병교,Kim, Bong-Chul,Han, Yong-Soo,Song, Yoon-Ho,Suh, Kyung-Soo,Lee, Jin-Ho,Lee, Nam-Yang,Park, Lee-Soon,Lee, Byung-Kyo 한국세라믹학회 2002 한국세라믹학회지 Vol.39 No.3

적색 칼라 필터 재료인 ${\alpha}-Fe_2O_3$가 고온 제조 공정을 거치는 동안 화학적인 안정성에 관해서 연구한 것이다. PDP(Plasma Display Panel)에 있어서 통상적으로 칼라 필터 층의 위에 사용되고 있는 투명 유전체의 경우는 광의 투과도를 높이기 위하여 ZnO를 첨가한다. ZnO가 포함되어 있는 유전체의 경우는 500$^{\circ}$C 이상에서 ${\alpha}-Fe_2O_3$의 열적 안정성을 감소시켜 칼라 필터로서의 기능을 완전히 상실하게 되어 투명하게 된다. 반면에 ZnO가 포함되지 않는 투명 유전체의 경우는 ${\alpha}-Fe_2O_3$가 적색의 색상을 유지하면서 칼라필터로서의 기능을 유지하고 있었다. ${\alpha}-Fe_2O_3$가 칼라 필터로 기능을 유지하기 위해서는 ${\alpha}-Fe_2O_3$와 접촉하는 투명 유전체는 ZnO가 포함되지 않는 투명 유전체를 사용하여 1차 보호막을 형성한 후 그 위에 ZnO가 포함된 투명 유전체층을 형성하면 적색 칼라 필터가 색상을 유지하게 된다. We searched thermal stability of ${\alpha}-Fe_2O_3$ using red color filter for display. In the PDP(Plasma Display Panel), the color filter layer is lied normally between front glass and transparent dielectric materials, so it might be needed to study the reaction of ${\alpha}-Fe_2O_3$ and transparent dielectric materials. The transparent dielectric materials containing ZnO has good transparency. Red colorlayer of ${\alpha}-Fe_2O_3$ contacted with dielectric material layer containing ZnO is changed to colorlessness over 500$^{\circ}$C because ZnO defuse ${\alpha}-Fe_2O_3$, the dielectric materials without ZnO, however, maintain red color at the same condition. We suggest that a layer contacting with ${\alpha}-Fe_2O_3$ red color layer has to lie with transparent dielectric materials without ZnO, then the materials containing ZnO is coated over to get color of ${\alpha}-Fe_2O_3$ for red color filter

악교정 수술을 위한 디지털 모형 수술의 정확성 평가

김봉철,박원서,강연희,이충국,유형석,강석진,이상휘,Kim, Bong-Chul,Park, Won-Se,Kang, Yon-Hee,Yi, Choong-Kook,Yoo, Hyung-Suk,Kang, Suk-Jin,Lee, Sang-Hwy 대한악안면성형재건외과학회 2007 Maxillofacial Plastic Reconstructive Surgery Vol.29 No.6

The accuracy of model surgery is one of important factors which can influence the outcome of orthognathic surgery. To evaluate the accuracy of digitalized model surgery, we tried the model surgery on a software after transferring the mounted model block into a digital model, and compared the results with that of classical manual model surgery. We could get the following results, which can be used as good baseline analysis for the clinical application. 1. We made the 3D scanning of dental model blocks, and mounted on a software. And we performed the model surgery according to the previously arranged surgical plans, and let the rapid prototyping machine produce the surgical wafer. All through these process, we could confirm that the digital model surgery is feasible without difficulties. 2. The digital model surgery group (Group 2) showed a mean error of $0.0{\sim}0.1mm$ for moving the maxillary model block to the target position. And Group 1, which was done by manual model surgery, presented a mean error of $0.1{\sim}1.2mm$, which is definitely greater than those of Group 2. 3. Remounted maxillary model block with the wafers produced by digital model surgery from Group 2 showed the less mean error (0.2 to 0.4 mm) than that produced by manual model surgery in Group 1 (0.3 to 1.4 mm). From these results, we could confirm that the digital model surgery in Group 2 presented less error than manual model surgery of Group 1. And the model surgery by digital manipulation is expected to have less influence from the individual variation or degree of expertness. So the increased accuracy and enhanced manipulability will serve the digital model surgery as the good candidate for the improvement and replacement of the classical model surgery, if careful preparation works for the clinical adjustment is accompanied.

Point-based surface best fit 알고리즘을 이용한 디지털 치아 모형과 3차원 CT 영상의 중첩 정확도

김봉철,이채은,박원서,강정완,이충국,이상휘,Kim, Bong-Chul,Lee, Chae-Eun,Park, Won-Se,Kang, Jeong-Wan,Yi, Choong-Kook,Lee, Sang-Hwy 대한구강악안면외과학회 2008 대한구강악안면외과학회지 Vol.34 No.5

Purpose: The goal of this study was to develop a technique for creating a computerized composite maxillofacial-dental model, based on point-based surface best fit algorithm and to test its accuracy. The computerized composite maxillofacial-dental model was made by the three dimensional combination of a 3-dimensional (3D) computed tomography (CT) bone model with digital dental model. Materials and Methods: This integration procedure mainly consists of following steps : 1) a reconstruction of a virtual skull and digital dental model from CT and laser scanned dental model ; 2) an incorporation of dental model into virtual maxillofacial-dental model by point-based surface best fit algorithm; 3) an assessment of the accuracy of incorporation. To test this system, CTs and dental models from 3 volunteers with cranio-maxillofacial deformities were obtained. And the registration accuracy was determined by the root mean squared distance between the corresponding reference points in a set of 2 images. Results and Conclusions: Fusion error for the maxillofacial 3D CT model with the digital dental model ranged between 0.1 and 0.3 mm with mean of 0.2 mm. The range of errors were similar to those reported elsewhere with the fiducial markers. So this study confirmed the feasibility and accuracy of combining digital dental model and 3D CT maxillofacial model. And this technique seemed to be easier for us that its clinical applicability can good in the field of digital cranio-maxillofacial surgery.

태국 기업법상 설립규정에 관한 비교법적 고찰

김봉철(KIM Bong-Chul),이준표(LEE Joon-Pyo) 한국태국학회 2011 한국태국학회논총 Vol.18 No.1

Thailand is newly industrialised and emerging in the world economy these days. After the Asian Financial crisis, the economy of the Southeast Asian country is recovering with the help of the IMF and several internal economic reforms. The legal reforms on enterprises is also related with the situation. One of the basic laws in this field is the Civil and Commercial Code section 22(Articles 1012 to 1273) which regulates partnerships or companies. The Public Limited Company Code also regulates these types of enterprises. There are three general types of partnerships in Thailand: Unregistered ordinary partnerships, Registered ordinary partnerships and Limited partnerships. These are governed by the Thai Civil and Commercial Code. There are two types of limited companies: private limited companies and public limited companies. The first is governed by the Civil and Commercial Code and the second is governed by the Public Limited Company Act. A public limited company governed by the Public Limited Company Code is one established for the purpose of offering the sale of shares to the public. The procedure for incorporating a public limited company is similar to that of a private limited company in registration requirements and shareholder liability. However, there are some differences between the two types on several requirements. Thailand is an interesting country for start a business in ASEAN. In 2008, the Thai Civil and Commercial Code and Public Limited Company Code was changed to simplify the incorporation of a limited liability company. In spite of these improvements, it may be asked whether these measures can actually guarantee the practice effect of laws. Hence, it is necessary for Thai enterprise law that should be established in incorporation procedure.

비가압식 막 공정을 통한 정삼투막 성능 평가

김봉철 ( Bong Chul Kim ),부찬희 ( Chan Hee Boo ),이상엽 ( Sang Youp Lee ),홍승관 ( Seung Kwan Hong ) 한국물환경학회 2012 한국물환경학회지 Vol.28 No.2

The objective of this study is to develop a novel method for evaluating forward osmosis (FO) membrane performances using a non-pressurized FO system. Basic membrane performance parameters including water (A) and solute (B) permeability coefficients and unique parameter for FO membrane such as the support layer structural parameter (S) were determined in two FO modes (i.e., active layer faces feed solution (AL-FS) and active layer faces draw solution (AL-DS)). Futhermore, these parameters were compared with those determined in a pressurized reverse osmosis (RO) system. Theoretical water flux was calculated by employing these parameters to a model that accounts for the effects of both internal and external concentration polarization. Water flux from FO experiment was compared to theoretical water fluxes for assessing the reliability of those parameters determined in three different operation modes (i.e., AL-FS FO, AL-DS FO, and RO modes). It is demonstrated that FO membrane performance parameters can be accurately measured in non-pressurized FO mode. Specifically, membrane performance parameters determined in AL-DS FO mode most accurately predict FO water flux. This implies that the evaluation of FO membrane performances should be performed in non-pressurized FO mode, which can prevent membrane compaction and/or defect and more precisely reflect FO operation conditions.

기업집단법에 관한 EU 및 영국의 인식

김봉철 ( Kim Bong-chul ) 한국외국어대학교 법학연구소 2013 외법논집 Vol.37 No.2

Based on the concept of ‘economic democracy’ which is appeared in the Korean Constitution, lots of efforts are currently underway to practice substantial justice. There is a proposal to raise the Corporate group law, as a concrete means of realizing the economic democracy. ‘Corporate group law’ are originally from the distinctive corporate culture in Western European countries. However, the purpose of the discussion of the Corporate group law in domestic is to regulate Chaebol (conglomerate). And its constitutional basis is generally found in the concept of economic democracy. Unlike other European countries, in the UK, most corporation are dispersed ownership structure and it is also rare that certain family-owned corporation dominates the whole Corporate group. Also the pyramid structure or multiple voting shares are rarely used, and the corporate control market is highly developed. Therefore, Korean Chaebol or conglomerates of personality that you have to evaluate the target are not existed. In the UK discussion about the Corporate group related to legislation has been relatively active, however, these discussions didn’t result in specialized legislation yet. Therefore, even in the UK, conflict of interest surrounding the Corporate group is resolved by the provisions of the corporation law. In other words, Corporate group is regulated in terms of the protection of minority shareholders of subsidiary and parent corporation, or creditors under the UK Corporation law. In addition, according to International Accounting Standards, obligations of the accounting treatment of the entire Corporate group are also a kind of Corporate group regulation. Taking into account the situation of the UK and domestic characteristics, several supplementation regarding the proposal of Corporate group law are necessary. if the legislation of the Corporate group law is necessary, ‘Corporate group’ requirements of the law must be delimited clearly, start the Corporation group law through the single legislation that has clear requirements application targets about the Corporate group then coverage maybe be expanded based on the social implications. Besides, to establish Corporate group law which is the new type of the law in this society, social consultation and legal legitimacy should be secured. So, it is not only about the economic democracy, which is as the logical basis, but also related to the ‘Corporate Social Responsibility Theory’.

원자력 위험특성 인식에 관한 상호지향성 분석

김봉철(Kim, Bong-Chul),정운관(Chung, Woon-Kwan),김유미(Kim, Yu-Mi) 한국광고홍보학회 2015 광고연구 Vol.0 No.104

본 연구는 원자력 위험특성 인식에 관한 일반국민과 원전지역주민, 원전직원 간의 차이를 검증하는 데 목적이 있다. 본 연구는 개인이나 집단 간 상호 이해도를 보다 명확하게 파악할 수 있는 분석틀로 알려진 상호지향성 모델을 적용하였다. 기존의 상호지향성 모델 적용 연구가 두 집단을 대상으로 해온데 반해 본 연구는 이를 확장하여 일반국민·원전지역주민·원전직원 등 세 집단 간 차이를 검증하고자 하였다. 일반국민 215명, 원전지역주민 201명, 원전직원 204명 등 모두 620명을 대상으로 분석한 결과 일반국민과 원전지역주민, 원전직원 간 원자력 위험특성에 대한 상호인식에 차이가 있는 것으로 나타났다. 이러한 차이는 특히 일반국민과 원전지역주민보다는 원전직원과의 관계에서 차이가 더 큰 것으로 나타났다. This study aims to investigate the difference on the risk perception about the nuclear plant among residents around it, plant employees and the general public. This study was employed by the co-orientation model which accurately analyzes how individuals or groups mutually understand each other. Furthermore, this study applied the co-orientation model to three different groups - residents around the nuclear plant, plant employees and the general public . not two groups primarily mentioned in the previous literature. The total of 620 responses were analyzed including 215 of the general public, 201 of residents around the nuclear plant, and 204 of plant employees. Results indicate that there are differences among three groups about the risk perception about the nuclear plant. Specifically there are significant differences between plant employees and the general public, and between plant employees and residents around the nuclear plant. This study provides the basic information to construct two-way mutual communication strategies among residents around the nuclear plant, plant employees and the general public.

아시아 레스토랑의 포지셔닝 분석에 관한 기초연구

김봉철(Bong Chul Kim),김미자(Mi Ja Kim) 한국조리학회 2004 한국조리학회지 Vol.10 No.4

한국음식이 미국 내에서 하나의 민족음식으로서 점차 인식되고 있음에도 불구하고, 미국인들이 지각하는 한국음식과 한국레스토랑의 인식과 관련한 연구는 미비한 실정이다. 지금까지 대부분의 연구는 한국을 방문한 외국인들이 지각하고 인식하는 한국음식에 관한 연구에 초점이 맞추어져 왔다. 그러므로, 한국음식과 한국레스토랑에 관한 미국인들의 인식과 한국레스토랑의 포지셔닝(positioning)에 관한 연구는 미국 내에서 한국레스토랑을 운영하는 메니져(manager)들에게 중요한 정보를 제공할 수 있을 것이다. 본 연구는 미국 마이애미 지역의 대학생들을 대상으로 하여 아시안 음식과 레스토랑에 관하여 대학생들이 지각하는 이미지를 확인하였으며, 인지된 대학생들의 아시안 레스토랑과 음식에 관한 이지미는 한국레스토랑의 포지셔닝과 비교분석하기 위하여 도식으로 표현되었다. 그리고 이러한 이미지 포지셔닝 연구는 남부 플로리다(South Florida) 지역에서 한국 레스토랑을 운영하는 메니져들에게 경쟁력 있는 마케팅 전략을 제시해 줄 수 있을 것이다. 따라서, 본 연구의 목적은 미국 마이에미 지역의 대학생들의 한국, 중국, 일본, 베트남, 태국 레스토랑과 음식을 어떻게 인식하고 있는가에 관한 기초 분석연구이다. 각 아시안 레스토랑의 포지셔닝을 확인하며, 본 연구에서 분석된 기초 자료들은 레스토랑 운영자들에게 중요한 마케팅 자료로 제공될 수 있을 것이다.

결혼이주여성들의 TV 시청에 대한 주관적 태도유형: Q 방법론의 적용

김봉철 ( Bong Chul Kim ),송미경 ( Mi Keoung Song ),구향미 ( Xiang Mei Ju ) 조선대학교 사회과학연구원 2012 서석사회과학논총 Vol.5 No.2

이 연구의 목적은 최근 급격하게 증가하고 있는 결혼이주여성들의 TV시청동기에 관한 주관적 인식을 살펴봄으로써 다문화사회에서 미디어의 역할을 재조명하는데 있다. 이를 위해 본 연구에서는 인간의 주관성을 탐구할 수 있는 Q 방법론을 이용하여 광주전남지역에 거주하는 40명의 결혼이주여성들을 대상으로 조사를 실시, 인식유형을 분류하고 유형들 간의 차이를 분석하였다. 분석결과 ‘문화적응 시청자 유형’, ‘습관적 시청자 유형’, ‘도구적 시청자 유형’ 등 모두 3개의 유형이 도출되었다. 그 중 ‘문화적응 시청자 유형’이 전체 변량 중 23.60%로 가장 설명력이 높은 것으로 밝혀졌으며, 3개 유형의 총 변량은 42.22%인 것으로 나타났다. 제1유형은 한국에 대한 역사나 문화를 이해하고 자녀들의 교육 등을 위해 TV를 시청하는 것으로 나타났다. 또한 이 유형은 한국 생활에서의 외로움 등을 달래기 위해 TV를 시청하며, 심심하거나 할일이 없어 TV를 시청하지는 않는 것으로 나타났다. 반면에 제2유형은 뚜렷한 동기나 목적없이 습관적이고 수동적으로 TV를 시청하는 것으로 나타났다. 제3유형은 경제적 욕구나 오락적 욕구 혹은 자녀 교육 등 뚜렷한 목적이나 필요성에 의해 TV를 시청하는 것으로 나타났다. 마지막으로 각 유형에 상관없이 결혼이주여성들이 공통적으로 TV를 시청하는 동기를 보면 한국생활과 한국문화에 대한 이해 및 한국어 공부 등이 주된 요인이었고, TV시청을 통해 건강에 대한 정보나 상식을 얻는 것에 대해서는 부정적인 의견을 형성하고 있음을 알 수 있었다. The purpose of this study is to examine subjectivity about TV viewing motivation of married migrant women whose number has been dramatically increasing in Korea. This study employed Q-method which has been considered as the most appropriate method to examine subjectivity of human beings, and 40 married migrant women in Gwangju were recruited as samples for this study. The results indicate that three types of TV viewing motivation of married migrant women extracted accounted for 42.22% of the total variance: Cultural adaptation viewership, Habitual viewership, and Instrumental viewership. Type 1, Cultural adaptation viewership accounted for 23.60 percent of the variance. Women who have Cultural adaptation viewership tend to watch TV to understand Korean history and culture. In this case, women do not watch TV for the purpose of killing times or soothing their homesick; Whereas, women in Habitual viewership passively watch TV without any aim or motivation. Women in Instrumental viewership are likely to watch TV with needs and firm motivation, such as for entertainment, finance, or education. Finally, marriage migrant women are likely to watch TV primarily motivated by understanding Korean culture and learning Korean language regardless of each viewership, but not motivated by reaching information about health or commonsense about Korean society. These results imply that TV programs should produce and broadcasting policy should regulates in the point of multi-cultural view.

TV 자선모금 프로그램에 대한 수용자의 정서적 · 인지적 관여가 기부의도에 미치는 영향

김봉철(Bong Chul Kim),최명일(Myungil Choi),김유미(Yu Mi Kim) SBS 2012 미디어경제와 문화 Vol.10 No.3

본 연구는 지각된 행위통제, 도덕적 규범, 이타주의를 매개변인으로 하여 TV자선모금 프로그램에 대한 수용자 관여가 기부의도에 미치는 영향을 알아보기 위한 것이다. 연구문제 해결 및 가설 검증을 위해 300명의 대학생들을 대상으로 설문조사를 실시했으며, 연구결과, 정서적 관여는 이타주의에만 유의미한 정(+)의 영향을 미치는 것으로 나타났고, 인지적 관여는 지각된 행위통제와 도덕적 규범에 유의미한 정(+)의 영향을 미치는 것으로 나타났다. 그리고 지각된 행위통제감, 도덕적 규범, 이타주의는 모두 기부의도에 유의미한 정(+)의 영향을 미치는 것으로 나타났다. 한편, 기부 경험이 많은 사람들은 TV 모금 프로그램 시청을 통해 ‘인지적 관여→도덕적 규범→기부의도’의 경로가 유의미하며, 기부 경험이 적은 사람들은 ‘정서적 관여→이타주의→기부의도’, ‘인지적 관여→지각된 행위 통제감→기부의도’ 등의 경로가 유의미하다는 사실을 확인할 수 있다. The purpose of this study is to investigate how audience involvement in TV donation program influences on donation intention in terms of the mediated effects of perceived behavioral control, moral norm and altruism. Results of this survey with 300 students show that affective involvement positively affected altruism, and cognitive involvement affected the perceived behavioral control and moral norm in a positive way. Furthermore, all of three variables, the perceived behavioral control, moral norm, and altruism, increased donation intention of message recipients. As a result, cognitive involvement influenced on donation intention of audience who have highly donated mediated by moral norm, and also affected intention of audience who have slightly donated mediated by the perceived behavioral control. Affective involvement affected intention of audience who have slightily donated mediated by altruism.