食餌中 脂肪 蛋白質및 choline이 血淸과 肝組織중의 脂肪量變動에 미치는 影響

朴在允,高光三,金千圭 조선의대 1983 The Medical Journal of Chosun University Vol.8 No.1

위절제술 후 Carboxy-Methylcellulose를 이용한 위장관 조영술

오재천,김용수,문원진,임현철,고병희,조온구 한양대학교 의과대학 1997 한양의대 학술지 Vol.17 No.1

The purpose of this study was to determine the usefluness of the UGI study with Carboxy-Methylcellulose (CMC) and 140% barium in the patient undergone gastrectomy We reviewed the UGI study with effervescent agent and barium and the UGI study with CMC and 140% barium of twenty one patients, undergone gastrectomy (Billroth-Ⅱ:12, Billroth-Ⅰ:4 total gastrectomy:5). The average interval between these studies was 19 months. The coating quality of the remnant stomach, anastomosis sit e, jejunum and proximal ileum in two studies were compared. The maximum luminal diameter of the same site and the maximum distance between a adjacent valvulae conniventes were measured for evaluating the distensibility of these studies. Compared with the coating quality of the remnant stomach, the UGI study with effervescent agent and barium was superior to the UGI study with C MC and barium in 68% (11/16) patients. The difference of coating quality between these studies was marginal in the anastomosis site and jejunum. The UGI study with CMC and barium provided a better coating quality in the proximal ileum of 95%(20/21). The maximum luminal diameter of the anastomosis site, jejunum and proximal ileum was respectively 2.75cm, 3.36cm, and 2.82cm inthe UGI study with effervescent agent and barium, 3.2cm 3.35cm, and 3.40cm in the UGI study with CMC and barium(p〈0.01). The maximum distance between a adjacent valvulae conniventes of the jejunum and proximal ileum was respectively 0.61cm and 0.51cm in the UGI study with effervesent agent and barium, 0.74cm and 0.72cm in the UBI study with CMC and barium (p〈0.05). Compared with the distensibility, the UGI study with CMC and barium was superior. The UGI study with CMC and barium in subjects, undergone gastectomy, showed the advantage the mucosa distal to anastomosis site except for the remnant stomach and must be supply the more information in finding lesion such as adhesion and peritoneal dissemination.

초등학교 실습지도교사가 인식한 수업실습 지도의 제약요인 탐색

고재천(Koh Jae Cheon) 학습자중심교과교육학회 2017 학습자중심교과교육연구 Vol.17 No.2

This study used concept mapping methods to explore the constraint factors that teacher educators perceive teaching student-teachers in the primary school. 20 teacher educators were interviewed and the collected ideas were reduced to 50 statements. Using multidimensional scaling and cluster analysis, we were able to subtract from a two-dimensional 5-cluster concept map. The results were as follows: First, teacher educators perceived the constraint factors as instruction-environment dimension and teacher-student dimension. Second, 5 clusters were deducted from the factors that constrain teaching student-teachers: inadequate training environment of teacher educators, lack of training conditions of student-teachers, lack of practical ability and motivation of student-teachers, lack of practical guidance and competence of teacher educators, and poor performance of practical guidance role of teacher educators. Third, the ratings from the 5 clusters revealed that the average of each cluster did not differ significantly from the others. The conclusions were as follows: First, the factors that constrain teaching student-teachers are teacher educator factors and student-teacher factors. Second, the important factors that constrain teaching student-teachers are not lack of practical guidance and competence and poor role performance of teacher educators but inadequate training environment of teacher educators.

예비 초등교사가 인식한 수업실습활동의 저해요인 탐색

고재천(Koh, Jae Cheon) 학습자중심교과교육학회 2018 학습자중심교과교육연구 Vol.18 No.2

이 연구는 예비 초등교사들이 인식한 수업실습활동의 저해요인이 무엇인지 개념도 방법을 사용하여 탐색하였다. 교육대학교 4학년 학생 26명을 대상으로 2017년 3월부터 12월말까지 약 10개월에 걸쳐 면담을 통하여 진술문 목록을 개발하고 이를 평정하여 다차원척도분석과 군집분석을 실시하여 개념도를 완성하였다. 연구 결과는 첫째, 예비 초등교사들은 수업실습활동의 저해요인을 실습지도 및 실습지원과 수업운영 및 실습조건의 두 가지 차원에서 인식하였다. 둘째, 예비 초등교사들이 인식한 수업실습활동의 저해요인은 모두 4개 요인으로 나타났다. 셋째, 예비 초등교사들이 인식한 수업실습활동의 저해요인들에 대한 중요성은 군집별로 큰 차이는 없었으나, 실습지도안작성 및 시연의 부담 군집과 실습 운영의 부실 군집이 상대적으로 높게 평가되었다. 연구의 결론은 첫째, 예비 초등교사들은 운영 및 조건 차원과 지도 및 지원 차원을 동시에 고려하여 실습지도안 작성 및 시연의 부담, 실습 운영의 부실, 실습 환경의 열악, 실습지도 여건 및 자료의 부족 등을 수업실습활동의 저해요인으로 인식하였음을 알수 있다. 둘째, 예비 초등교사들은 수업실습활동의 저해요인으로 실습지도안 작성 및 시연의 부담이나 실습 운영의 부실과 같은 수업운영 요인을 보다 더 중요한 요인으로 인식하였음을 알 수 있다. 셋째, 이 연구가 예비 초등교사들이 인식한 수업실습활동의 저해요인에 대한 개념적 구조를 밝혀 줌으로써 수업실습활동 관련 이론의 정립과 관련 정책 및 프로그램의 개발에 활용될 수 있을 것이다. This study used concept mapping methods to explore the factors that student-teachers perceive inhibit class practices in the primary school. 26 student-teachers were interviewed and the collected ideas were reduced to 45 statements from March to December 2017. Using multidimensional scaling and cluster analysis, we were able to subtract from a two-dimensional 4-cluster concept map. The results were as follows: First, student-teachers perceived the inhibitory factors as instruction-support dimension and operation-condition dimension. Second, 4 clusters were deducted from the factors that inhibit class practices: the burden of preparing a lesson plan and class performance, failure of practice, poor practice environment, and lack of practice guidance and materials. Third, the ratings from the 4 clusters revealed that the average of each cluster did not differ significantly from the others. But, student-teachers perceived operation dimension factors as more important than conditional dimension factors. The conclusions were as follows: First, 4 inhibitory class practice factors perceived by student-teachers were depended on two dimensions. Second, student-teachers perceived the burden of preparing a lesson plan and class performance as the most important factors.

NiCuZn Ferrite 분말제조에 있어서 Ball Mill 분쇄 공정 중에 혼입되는 불순물의 함량

고재천(Jae-Cheon Koh),류병환(Beyong-Hwan Ryu) 한국자기학회 1999 한국자기학회지 Vol.9 No.4

The pick up impurity was studied for preparing the NiCuZn ferrite powder by a ball milling method that usually uses in the industrial ceramic process. The raw materials of NiO, CuO, ZnO, and Fe₂O₃ powder were weighted according to various spinel composition and mixed for 18 hrs by a wet ball milling method after that the slurry was followed by spray dried and calcined at 700 ℃ 3 hrs. The calcined NCZF powder was finally ball milled during 65 hrs as same method. The stainless steel ball and jar are used as mixing and milling equipment and the solid concentration of the slurry was 25 vol%. The impurities, stainless steel pickup, were effected by the composition of raw materials especially iron oxide, nickel oxide in the mixing process and by the rate of calcine of NiCuZn ferrite in final milling process. The empirical equation of stainless steel pickup was driven in the wet ball milling system. Finally, the composition of NiCuZn ferrite could be controlled by the empirical equation.

초등교사의 전문성 탐색

고재천(Jae Cheon Koh) 한국초등교육학회 2001 초등교육연구 Vol.14 No.2

The purpose of this study was to examine the professionalism of the elementary school teachers on the basis of the nature and characteristics of elementary education. The literature analysis identified the characteristics of elementary education by the five aspects of educational processes. And then, this study explored the professionalism of the elementary school teachers on the basis of those characteristics. The five characteristics of elementary education examined were integrative education, whole-child education, basic and fundamental education, common and general education, and free and compulsory education. Teaching in the elementary school level is characterized as a profession in the normative aspects, but it is difficult to say so in the practical aspects. The professionalism of the elementary school teachers in the normative aspects was identified as follows; First, the elementary school teacher should be the professional who has the integrative view on elementary education. Second, the elementary school teacher should be the professional who behaves as a model to form a whole-child. Third, the elementary school teacher should be the professional who teaches all subject matters in an elementary school. Fourth, the elementary school teacher should be the professional who instructs children with a proper way in an elementary level. Lastly, the elementary school teacher should be the professional who possesses, as a practicer, the consciousness of mission and servicemanship in his/her occupation. After all, it is important that the problem on approving the professionalism of the elementary school teacher depends on how teacher`s professionalism can be actualized in the classroom settings.

초등학교 교사가 인식한 수업 자율성의 구성 요인 탐색

고재천(Koh Jae Cheon) 학습자중심교과교육학회 2019 학습자중심교과교육연구 Vol.19 No.2

This study used concept mapping methods to explore the factors that primary school teachers perceive to construct the teaching autonomy. 25 primary school teachers were interviewed and the collected ideas were reduced to 43 statements from January 2018 to October 2018. Using multidimensional scaling and cluster analysis, a two-dimensional 5-cluster concept map was created. The results were as follows: First, primary school teachers perceived the construct factors of teaching autonomy as the 5 clusters and 2 dimensions. 2 dimensions were inside-outside classroom level and inside-outside class activities level. 5 clusters were ‘decision of teaching activities’, ‘demonstration of instructional professionalism’, ‘selection of class contents’, ‘treatment of class works’, and ‘judgment of class surrounding needs’. Second, the ratings from the 5 clusters revealed that the average of each cluster did not differ significantly from the others. The conclusions were as follows: First, it was found that primary school teachers were simultaneously considering both classroom activities and class spaces to identify the conceptual structure of the construct factors of teaching autonomy. Second, it was found that the most important factors that construct the teaching autonomy recognized by primary school teachers were things that are directly related to the class. Third, this study can be applied to the theoretical understanding and program development about teaching autonomy.

A Comparative Analysis of Differential LC VCOs with different Tank Structure for an ICS in InGaP/GaAs HBT Technology

Jae-Ho Yoon,Young-Ho Lee,Sang-Hoon Lee,Bhanu Shrestha,Ah-Rah Koh,Sun-Jin Kim,Sang-Hoon Cheon,Gary P. Kennedy,Nam-Young Kim 한국통신학회 2005 한국통신학회 학술대회논문집 Vol.2005 No.6

MMIC Differential LC-VCO and Mixer Design for Low Phase Noise and High Output Power in InGaP/GaAs Technology

Jae-Ho Yoon,Ah-Rah Koh,Min-Jeong Kim,Bhanu Shrestha,Sang-Hoon Cheon,Nam-Young Kim 한국통신학회 2006 한국통신학회 학술대회논문집 Vol.2006 No.7

Quantitative Assessment of Cerebral Blood Flow Recovery after Drug Therapy in Attention Deficit Hyperactivity Disorder using 3D Image Registration

Jae Sung Lee,Kyeong Min Kim,Cheol Eun Kwark,Ho Cheon Song,Bung Nyun Kim,Kwang Suk Park,Dong Soo Lee,June Key Chung,Myung Chul Lee,Soo Churl Cho,Chang Soon Koh 대한핵의학회 1996 핵의학 분자영상 Vol.30 No.3