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임플랜트 Overdenture의 Bar설계에 따른 하악지지조직의 광탄성학적 응력분석
강정민,방몽숙,Kang Jeong-Min,Vang Mong-Sook 대한치과보철학회 1994 대한치과보철학회지 Vol.32 No.2
This study was performed to evaluate the effects of number and alignment of implant fixture and various bar designs on the retention of denture and the stress distribution. Six kinds of photoelastic mandibular models and nine kinds of overdenture specimens were designed. A unilateral vertical load was gradually applied on the right first molar to calculate the maximal dislodgement load of each specimen. A unilateral vertical load of 17 Kgf was applied on the right first molar and a vertical load of 10 Kgf was applied on the interincisal edge region. The stress pattern which developed in each photoelastic model was analyzed by the reflection polariscope. The results obtained were as follows: 1. The maximal dislodgement load reversely increased with the distance from the loading point to the implant fixture, while it linearly increased with that from the most posterior implant fixture to the mesial clip. The maximal dislodgement load also increased with the use of a cantilever bar. 2. Under the posterior vertical load, the stress to the supporting tissue of the denture base increased with the distance from the loading point to the implant future. The stress concentration on the apical area of the implant future reversely increased with the distance from the loading point to the implant future. 3. In the overdentures supported by two implant fixtures under the posterior vertical load. the specimen implanted on lateral incisor areas with a cantilever bar exhibited more favorable stress distribution than that without a cantilever bar. The specimen implanted on the canine areas without a cantilever bar, however, exhibited more favorable stress distribution. 4. In the overdentures supported by three implant fixtures. the specimen implanted ell the midline and canine areas exhibited more favorable stress distribution than that implanted oil the midline and the first premolar areas. 5. In the overdentures supported by four implant fixtures. the specimen implanted with two adjacent implant fixtures exhibited more favorable stress distribution than that implanted at equal distance under the posterior vertical load. 6. Under the anterior vertical load, the overdentures supported by three implant fixtures exhibited stress concentration on the supporting structure of the middle implant future. In overdentures supported by two or four implant futures, no significant difference was noted in stress distribution between the types of bars. These results indicate that the greater the number of implant fixtures, the better the stress distribution is. A favorable stress distribution may be obtained in the overdentures supported by two or three implant fixtures, if the location and the design of the bar are appropriate.
가족샘종폴립증에 대한 전대장직장절제술 후 회장낭에 발생한 다발성 샘종 2예
강정민 ( Jeong Min Kang ),변정식 ( Jeong Sik Byeon ),박종하 ( Jong Ha Park ),안지용 ( Ji Yong Ahn ),고옥배 ( Ock Bae Ko ),명승재 ( Seung Jae Myung ),양석균 ( Suk Kyun Yang ),김진호 ( Jin Ho Kim ) 대한소화기학회 2010 대한소화기학회지 Vol.56 No.1
Familial adenomatous polyposis (FAP) is an inherited disease characterized by the development of hundreds of colorectal adenomas, leading to a 100% lifetime risk of colorectal cancer. A prophylactic colectomy is recommended for patients with FAP to prevent colorectal cancer. Four surgical strategies are available for patients with FAP: proctocolectomy with permanent ileostomy, colectomy with ileorectal anastomosis, proctocolectomy with Koch`s pouch continent ileostomy (Koch), and restorative proctocolectomy with ileal pouch-anal anastomosis (IPAA). Koch and IPAA, which make ileal pouch, have theoretical advantage of the elimination of the risk of colorectal cancer and adenomas and good functional outcome of reduced defecation frequency. However, recent reports have shown frequent development of adenomas and carcinomas in the ileal pouch after Koch or IPAA. We experienced 2 cases of multiple pouch adenomas after pouch surgery in FAP patients. Both patients were treated with endoscopic mucosal resection without complications. We report these 2 cases with a review of literatures. (Korean J Gastroenterol 2010;56:49-53)
강정민(Kang, Jeong-Min),강석진(Kang, Seok-Jin) 대한건축학회 2020 대한건축학회 학술발표대회 논문집 Vol.40 No.2
The purpose to this study was to derive environmental design elements (planning indicators) and conduct field survey to prevent child abuse in kindergarten. The framework of the field survey analysis divided the physical environment into boundary, external, internal and management areas. The indicators were compiled from the perspective of CPTED by reference to prior studies and related reports. The results of this study, the guidelines of the relevant agencies were insufficient in the research and guide of child abuse perspectives. And, field survey did not have difficulty using the indicators. A follow-up study will verify the adequacy of the indicators with experts.
맟춤형 정보제공을 위한 RSS 기반 교육정보시스템의 개발
강정민(Kang Jeong Min),전석주(Chun Seok Ju) 한국컴퓨터정보학회 2007 韓國컴퓨터情報學會論文誌 Vol.12 No.5
본 연구에서는 교사, 학생 및 학부모와 같은 교육정보 사용자들에게 맞춤정보를 제공하는 RSS 기반 교육정보시스템을 개발한다. 다양한 교육정보 웹페이지로부터 교육정보를 수집하기 위해서 우리는 웹기반 RSS 리더기를 설계한다. 웹기반 RSS 리더기는 RSS를 제공하는 해당사이트나 블로그 등의 URL의 주소를 입력받아 RSS 파일인지를 인식하고 파서에 로드하여 XML 문서로 생성하고 분류하여 시스템에 등록한다. 시스템에 등록된 문서에 해당되는 웹페이지에 새로운 정보가 업데이트 되면 자동으로 이를 수집하여 사용자에게 제공해준다. 따라서 사용자들은 자신에게 적합한 정보를 얻기 위해 일일이 해당되는 사이트를 검색하지 않고서도 실시간으로 맞춤형 교육정보를 제공받을 수 있다. In this study, we develop a RSS-based educational information system for providing users, such as teachers, students, and parents of students with an adapted information. In order to collect an educational information from diverse web pages we design a web-based RSS reader. The RSS reader reads RSS files from the web sites or blogs which provide RSS feeds and then creates XML documents. The created XML documents are classified and registered into the system. Whenever the registered web-pages are updated, the system can automatically collect the updated information and provide the user with it. Therefore the user can be provided a real-time adapted educational information without searching web-sites from the system.
고등학교 생명과학 수업의 진단평가 및 형성평가에서 교실응답시스템의 활용 효과
강정민 ( Jeong Min Kang ),심규철 ( Kew Cheol Shim ),동효관 ( Hyo Kwan Dong ),김운화 ( Wa Hwa Gim ),손정우 ( Jeong Woo Son ),곽대오 ( Dae Oh Kwack ),오경환 ( Kyung Hwan Oh ),김용진 ( Yong Jin Kim ) 한국과학교육학회 2014 한국과학교육학회지 Vol.34 No.3
본 연구는 문제풀이 중심으로 운영되는 고등학교 생명과학 수업에서 교육매체의 일종인 교실응답시스템(CRS)의 활용 가능성을 알아보고자 하였다. 교수·학습 전략으로 CRS 활용반(34명)은 학생들이 CRS 단말기로 응답한 결과를 교사가 즉시 파악하고 개인별 응답 이유를 질문한 후 피드백을 하였다. 비교반(34명)에서는 CRS를 사용하지 않았으며 학생들에게 일괄적인 피드백을 하였다. 연구 결과, CRS 활용이 학생들로 하여금 수업 활동에 흥미와 집중력을 높여주는 것으로 인식되었다. 그러나 학업 성취도의 향상에 있어서 CRS 활용반과 비교반 사이에 유의한 차이는 없었다. 다만 성적 수준에 따라 그룹을 나누었을 때, 중위그룹에서는 CRS 활용반과 비교반 사이에 학업 성취도의 향상에 유의한 차이를 보였다. 진단평가 및 형성평가에서 CRS 활용의 효과를 높이기 위해서는 다양한 수준의 문제들을 사전에 개발하고, 학생들의 응답 이유를 정확히 파악하여 더욱 많은 학생들에게 개인별 맞춤형 피드백을 할 수 있는 교수 전략의 개발이 필요함을 제안한다. The purpose of this study was to examine the potential of the use of Classroom Response System (CRS), a kind of new ICT medium, in the quiz problem-solving oriented high school life science class. To find usefulness of CRS as a teaching and learning strategy, CRS group (n=34) sent prompt individual answers to the teachers` questions using CRS terminal (Clicker), and then the teacher asked additional individual reasons and gave personalized feedbacks. In the control group (n=35), CRS was not used while the teacher asked overall questions and gave feedback in an undifferentiated way. As a result, using CRS increased students` interest and concentration during class, but there were no significant differences in study achievement between the two groups. However, there were significant differences between the medium-level groups when the two groups were divided into smaller ones based on their pre-scores. We suggest that, for the effective CRS for diagnostic and formative assessment, teachers should develop the teaching and learning strategy that can produce appropriate questions with various levels in advance, investigate exact reasons for students` answers, and give customized feedback by individual as much as possible.
강정민(Kang, Jeong-Min),강석진(Kang, Seok-Jin) 대한건축학회 2019 대한건축학회 학술발표대회 논문집 Vol.39 No.2
The aim of this study is to analysis safety issue such as Crime and Transportations affecting Residential Environment and inquire into and improvement through investigate on the Street Environment and Survey in university town. The results of this study are as follows. First, field survey showed the space with high fear of crime in low D/H ratio and insufficient visibility, and that the space with high probability of traffic accidents is a mixed area between pedestrians and vehicles. Second, the satisfaction of residence is high, but it need to manage the street environment, facilities and spaces for various activities. Third, There was a high fear of crimes involving behavior characteristics of university students. Finally, it was necessary to enhance pedestrian safety that separation of the vehicle and pedestrian traffic.