문항반응이론을 이용한 원격교육환경에서 사회적 실재감 측정도구의 타당도 검증

김정주 ( Jung Joo Kim ) 한국교육정보미디어학회(구 한국교육정보방송학회) 2011 교육정보미디어연구 Vol.17 No.1

본 연구는 원격교육에서 사회적 실재감 측정도구의 타당도를 검증하고 활용방안을 제시하는 것을 목적으로 한다. 이를 위해 Kim(2010)의 측정도구를 가지고 문항반응이론의 Rasch 모형분석을 실시하였다. 도구는 상호지원 및 집중, 정서적 유대감, 공동체감 및 개방적 커뮤니케이션의 4개 하위영역의 총 19개 문항으로 이루어졌다. 분석 자료는 기존의 국내 5개 사이버대학의 재학생들의 설문을 통해 수거된 유효응답자 492개의 표본을 사용하였다. 분석 결과는 다음과 같다. 우선, 문항의 적합도 분석 결과 외적합도수가 기준치인 1.50 이상으로 나온 1개 문항을 제거하는 것이 적절한 것으로 판단되었다. 둘째, 기존 도구에서 구인을 측정하는 데 사용된 5점 척도의 유용함을 분석한 결과 각 응답범주가 명확하고 유용하여 5점 척도의 사용이 타당함을 검증할 수 있었다. 셋째, 문항난이도 분석을 통해 개인들의 속성을 모두 측정할 수 있도록 비교적 난이도가 골고루 분포되어 있음을 확인하였다. 다만 개인의 속성 점수가 매우 높거나 매우 낮은 부분을 측정하는 문항들이 중간부분에 비해 상대적으로 적게 분포되어 있었다. 본 연구의 결과를 바탕으로 사회적 실재감의 영역별 속성, 변화 양태에 따른 연구와 구체적이고 실천적인 교수법을 제안하는 연구 등 많은 영역과 주제에 본 도구를 활용할 수 있음을 제시하였다. This study is purported to verify the validation of social presence scale and represent its application in distance education. To meet its purpose, this study applied Rasch model based on item response theory to analyze Kim`s social presence scale (2010) among others. This scale was composed of 19 items from 4 domains such as mutual attention and support, affective connectedness, sense of community and open communication. The data used in this study was 492 samples valid for analysis that was collected from the students surveyed from 5 cyber universities in Korea. The result of analysis is as following. First, the appropriateness of overall items would be better adjusted with deletion of 1 item. Second, 5 response categories used in the instrument are confirmed to be appropriate to measure individuals` responses. Third, item difficulty analysis showed that items are well distributed to measure overall individuals` attributes but not the ones with very high or low social presence. Based on this result, this study suggested the application of the scale in such a way that it can be used in many studies using 4 domains and developmental attributes of social presence resulted from this study and suggesting specific and practical instructional methods. It is expected that this scale can be elaborated and generated by being used in many forthcoming studies.

Preceramic Polymer를 이용한 저유전박막 제조 및 특성 분석

김정주,이정현,이윤주,권우택,김수룡,최두진,김형순,김영희,Kim, Jung-Ju,Lee, Jung-Hyun,Lee, Yoon-Joo,Kwon, Woo-Teck,Kim, Soo-Ryong,Choi, Doo-Jin,Kim, Hyung-Sun,Kim, Young-Hee 한국세라믹학회 2011 한국세라믹학회지 Vol.48 No.6

Recently, variety of organic and inorganic hybrid materials have recently investigated as alternative routes to SiOC, $SiO_2$ thin film formation at low temperatures for applications in electronic ceramics. Specially, silicon based polymers, such as polycarbosilane, polysilane and polysilazane derivatives have been studied for use in electronic ceramics and have been applied as dielectric or insulating materials. In this study, Polycarbosilane(PCS), which Si-$CH_2$-Si bonds build up the backbone of the polymer, has been investigated as low-k materials using a solution process. After heat treatment at 350$^{\circ}C$ under $N_2$ atmosphere, chemical composition and dielectric constant of the thin film were $SiO_{0.27}C_{1.94}$ and 1.2, respectively. Mechanical property measured using nanoindentor shows 1.37 GPa.

한계전단변형률 개념을 이용한 터널의 지반이완하중 평가

김정주,이재국,김종욱,유한규,Kim, Jung-Joo,Lee, Jae-Kook,Kim, Jong-Uk,Yoo, Han-Kyu 한국터널지하공간학회 2013 한국터널지하공간학회논문집 Vol.15 No.6

터널의 지반이완하중 산정방법에는 이론식, 경험식, 수치해석적인 방법 등이 있는데 이론식과 경험식은 실무에 적용하기에는 많은 한계점이 있다. 따라서, 본 연구에서는 그 중에서 수치해석적 방법이 지반이완하중 산정에 필요한 모든 매개변수를 고려할 수 있고, 지반과 지보재의 상호작용을 모사할 수 있기 때문에 보다 합리적인 방법이라 판단하였다. 수치해석 결과를 바탕으로 명확한 지반이완영역을 결정하기 위하여 Sakurai(1981)의 한계전단변형률 개념을 이용하였다. Stable region의 경계영역인 Level 1의 지반이 완하중고를 산정한 결과 지반등급 3까지는 지반이완하중이 산정되지 않았고, 지반등급 4, 5에서는 기존 산정방법들에 비해 지반이완하중고가 작게 산정되어 보다 경제적인 콘크리트라이닝 설계가 가능할 것으로 판단하였다. After studying the characteristics of three different evaluation methods of rock load; namely theoretical method, empirical method and numerical method, there were too many limitations for them to be applied on tunnels. Therefore, in this research paper, the method based on numerical analysis is selected to use as this method is the most reasonable one since it considers all parameters that are necessary for rock load estimations, and it also considers the interaction between ground and tunnel support. The critical shear strain concept formulated by Sakurai (1981) was used in order to measure exact rock load values based on numerical analysis. Evaluation on a Level 1 rock load height, which is depicted by the stable region in the graph shows that rock load is not affecting between ground grade 1~3, and it was evaluated that the fourth and fifth grades show less values of rock load height which led to the conclusion of a more economical design of concrete lining.

터널식 전력구 쉴드TBM 선정 및 기본설계 사양 제시에 관한 연구

김정주,이지윤,류희환,정주환,이석재,배두산,Jung Joo Kim,Ji Yun Lee,Hee Hwan Ryu,Ju Hwan Jung,Suk Jae Lee,Du San Bae 한국터널지하공간학회 2023 한국터널지하공간학회논문집 Vol.25 No.3

Power cable tunnels is one of the underground structures meant for electricity transmission and are constructed using shield TBM method when transitting across urban and subsea regions. With the increasing shaft depth for tunnels excavation when the shield TBM excavated the rock mass, the review of selecting closed-type shield TBM in rocks becomes necessary. A simplified shield TBM design method is also necessary based on conventional geotechnical survey results. In this respect, design method and related design program are developed based on combined results of full-scale tests, considerable amount of accumulated TBM data, and numerical simulation results. In order to validate the program results, excavation data of a completed power cable tunnel project are utilized. Thrust force, torque, and power of shield TBM specification are validated using Kernel density concept which estimates the population data. The robustness of design expertise is established through this research which will help in stable provision of electricity supply.

계란의 수요변화와 공급 대응정책

김정주,정경수 ( Jung Joo Kim,Kyeong Soo Jeong ) 한국축산경영학회 1997 韓國畜産經營學會誌 Vol.13 No.1

계란의 유통구조 개선

김정주,김운영 ( Jung Joo Kim,Woon Young Kim ) 한국축산경영학회 1994 韓國畜産經營學會誌 Vol.10 No.1

랄프 엘리슨의 『준틴스』와 미국적 시민 종교

김정주 ( Jung Joo Kim ) 미국소설학회 2008 미국소설 Vol.15 No.2

This paper is a part of the inquiry into African American novelist Ralph Ellison`s socio-political vistas. This study focuses on Ellison`s “antagonistic cooperation” with the mores of American civil religion in his posthumous novel Juneteenth. Into this po

한국 프로축구 마케팅 전략에 관한 연구

김정주(Kim Jung-Joo),최용순(Choi Yong-Soon) 경희대학교 스포츠과학연구원 1998 체육학논문집 Vol.26 No.-

  This research provides basic information about the strategies of Korean professional soccer that effects the visitors’ satisfaction in enjoying the game as 2002 Worldcup tournament nears. The conclusions are based on the research experiment of the 770 visitors of Mokdong, Anyang, Suwon, and Pohang stadiums between 13th September of 1998 and 27th September of 1998.<BR>  1. Entertainment programs, the presence of star players in either teams playing, rivalry team games, popularity of teams, commercializing the game from the professional soccer agency and the time of the game had significant effects as marketing factors on the visitors. Star players’ playing abroad and how the fan clubs were run effected the visitors.<BR>  Fan services such as lottery picks and the kindness of the executives of the game had a small effect.<BR>  2. As the gaming factors, the home team’s result (win or loss), game style, the flaming rivalry among teams, the players’ will to win, the effort of players and teams to break certain records, and in­season results of teams had significant effects on the visitors.<BR>  The visiting teams’ result (win or loss), and the performances of foreign players had some effect on the visitors.<BR>  3. The cleanness of stadiums, the convenience of watching the games, the effective use of the scoring board and the easiness in coming to the stadiums had significant effects as stadium factors on the visitors. How much people the stadium could hold, the visitors’ attitudes during the game, the convenience of purchasing the tickets, and the parking spaces had some effects on the visitors.

유아실습지도 교사교육내용의 개념도 및 인식 분석

김정주(Kim Jung Joo),이명숙(Lee Myung Sook) 한국육아지원학회 2006 육아지원연구 Vol.1 No.2

본 연구는 유치원 실습 시 실습지도 교사들이 예비교사들을 담당하기 위하여 갖추어야 할 교사교육내용이 어떠한가를 개념도 분석을 통하여 알아보고, 교육내용의 인식 정도를 알아보기 위해 실시되었다. 서울과 수도권에 있는 유치원교사 32명을 대상으로 개별 면접을 통한 개념도와 질문지를 응답하게 하였다. 연구결과 교사들이 가장 중요하게 인식하는 내용은 ‘전문성’이었고 이것은 실질적으로 다루어지는 내용에서도 뚜렷하게 나타났다. 교사들의 실습지도 교사 교육 내용에 대한 종속개념은 다양한 용어로 나타났다. 교육내용에 대한 교사들의 전문성에 대한 중요성은 개념도에서 뿐만 아니라 교사들의 인식정도에서도 가장 높게 나타났다. The purpose of this study is to investigate the cooperating teachers' concept and perception about contents of student teachers' practice by analyzing the cooperating teachers' concept map and questionnaire. The participants were 32 teachers of kindergarten and child-care center in Seoul and Gyunggi-do. They have experienced role of cooperating teacher on student teachers' practice. They were asked to draw a concept map and to answer questionnaire about the content of student teachers' practice. The finding of this study were summarized as follow: 1. There are many contents related to professionalism about both superordinate concept and subordinate concept. 2. By concept map and questionnaire, professionalism is the most important content about cooperating teachers' concept. 3. Teachers used 331 vocabularies. Those vocabularies were similar when they expressed in same concept.

육계 산지가격 예측에 신경회로망 ( Neural Network )의 적용

김정주 ( Jung Joo Kim ) 한국축산경영학회 1995 韓國畜産經營學會誌 Vol.11 No.1