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웹 기반의 교수자·학습자간 행동 동기화 기법을 이용한 실시간 원격 강의 시스템
이부권,박규석 경남대학교 정보통신연구소 1999 연구논문집 Vol.1 No.-
현재 다양한 환경에서 여러가지 원격 강의 기법이 있지만, 아직 면대면 강의보다 적합한 시스템은 거의 없다. 이와 같이 아직도 면대면 강의가 훨씬 효율적이라는 것은 누구도 부정할 수 없다. 하지만 컴퓨터를 이용한 원격 강의에서 면대면 강의의 효과를 그대로 적용할 수 있다면 면대면 강의의 효과를 얻을 수 있을 것이다. 본 논문에서는 면대면 강의에서 발생할 수 있는 교수자의 행동을 분석하여 학습자의 상황으로 그대로 전이시켜 면대면 강의의 효과를 제공하는 것이다. 교수자의 행동은 설명을 하기 위한 소리의 전달, 칠판이나 TP의 내용을 가리키는 포인팅, 그리고 문서의 페이지 또는 형태가 된다. 먼저 학습자가 웹 상의 홈페이지를 이용해서 문서를 검색하며, 이후에 교수자는 설명을 소리로써 하게 되며, 특정 페이지를 보게 된다. 특히 설명을 위해서 마우스를 이용해 특정 위치를 가리키게 된다. 이와 같이 모든 교수자의 행동을 감지하여 학습자로 전달시켜 주는 기능과 전달받은 의미를 분석하여 학습자에게 표현해 주는 기능으로 분류할 수 있는데 본 논문에서는 전자를 서버, 후자를 클라이언트라고 정의한다. There are many different remote lecture systems, but there is no better lecture system than face-to-face system. And, nobody can deny the face-to-face lectures are more efficient. Accordingly, if a computer assisted lecture can adapt the effect of face-to-face lecture, we could acquire the effect. In this paper, we analyze teacher's actions in face-to-face lecture, and transfer it to the student's aspects and can provide the effect of face-to-face lecture. Teacher's actions are voice delivery to explain something, pointing objects and pages or form of documents. First, students display document pages via Web. Then, the teacher gives voice to explain the contents and points to the document. The server(teacher side) captures teacher's action and transfers it to students, and the client(student side) receives and analyzes the action, then presents it on monitor or speaker.
골격성 제3급 부정교합환자의 하악지 시상분할 골절단술후 하안면 폭경 및 고경의 변화에 대한 두부계측 방사선학적 연구
장현석,임재석,권종진,이부규,손형민 대한악안면성형재건외과학회 2000 Maxillofacial Plastic Reconstructive Surgery Vol.22 No.3
Purpose : The purpose of this study was to analyze the lower third facial changes in frontal view after mandibular setback surgery. Materials and Methods : In this study, fifteen subjects(6 males and 9 females) with class III dental and skeletal malocclusions who were treated with BSSRO(Bilateral Sagittal Split Ramus Ostetomy) were used. Frontal cephalometric radiographs were taken preoperatively and more than 6 months postoperatively, and hard tissue(H2-Hl) and soft tissue changes (S2-S1) were measured on vertical and horizontal reference lines. In 15 cases, changes which developed more than 6 months after surgery were studied. Results : The results were as follows. 1.In the facial height, hard tissue decreased(2.46±2.76mm) with statistical significance(P<0.01), and soft tissue also decreased(1.64±3.66mm). As a result, the facial height generally becomes shorter after sagittal split ramus osteotomy. 2.In the mandibular width, hard tissue decreased(2.08±3.59mm) with statistical sgnificance(P<0.05), but soft tissue increased (2.14±5.73mm) without statistically significant difference (P>0.05) postoperatively. 3.In the facial index, hard tissue decreased(0.23±2.21%), but soft tissue increased(2.41±3.46%) with statistical significance. Conclusion : One of the main purpose of orthognathic surgery is to achieve facial esthetics and harmony. In order to fullfill this purpose, it is important to carry out a precise presurgical treatment planning by estimating the changes of frontal profile after surgery.
김웅철,이원철,손영석,오세윤,김부섭,유진호,김지환 한국보건의료인국가시험원 2005 보건의료교육평가 Vol.2 No.1
This study prepared a basic framework for the development and improvement of Korean Dental Technicians' Licensing Examination, based on actual test questions. A peer review was conducted to ensure relevance to current practices in dental technology. For the statistical analysis, 1000 dental laboratory technicians were selected; specialists in dental laboratory technology (laboratory owners, educators, etc.) were involved in creating valid and reliable questions. Results indicated that examination subjects should be divided into three categories: basic dental laboratory theory, dental laboratory specialties, and a practical examination. To ensure relevance to current practice, there should be less emphasis on basic dental laboratory theory, including health-related laws, and more emphasis on dental laboratory specialties. Introduction to dental anatomy should be separated from oral anatomy and tooth morphology; and fixed prosthodontics should be separated from crown and bridge technology and dental ceramics technology. Removable orthodontic appliance technology should be renamed 'orthodontic laboratory technology'. There should be less questions related to health related law, oral anatomy, dental hygiene, dental materials science and inlay, while the distribution ratio of questions related to tooth morphology should be maintained. There should be a decrease in the distribution ratio of questions related to crown and bridge technology, dental ceramics technology, complete dentures and removable partial dentures technology, and orthodontic laboratory technology. In the practical examination, the current multiple choice test should be replaced with tooth carving using wax or plaster. In dental laboratory specialties, subjects related to contemporary dental laboratory technology should be included in the test items.
강섬유보강 콘크리트 슬래브의 내력 및 균열특성에 관한 실험적 연구
박승범,조광연,장석호,김부일 忠南大學校 産業技術硏究所 1997 산업기술연구논문집 Vol.12 No.2
This Study is aimed to investigate the effect of load and deflection on steel fiber reinforced concrete slab. Slabs were made with Hooked and Straight types steel fiber and compared a change of steel fiber contents and fiber type. Test were carried out to evaluate the first crack load, maximum load and deflection of slab. AT this result, the first crack load, maximum load and energy absorption capacity were increased remarkably as steel fiber contents were increased. And we found that the deflection of slab at same load were decreased as steel fiber contents were increased, too. As the aspect ratio was increased, the first crack load, maximum load and energy absorption capacity were increased.
전주원,손영우,서부일,한두석 대한본초학회 2004 大韓本草學會誌 Vol.19 No.1
Objective : The aim of this study was to evaluate cytotoxic effect of benzoic acid on normal human skin fibroblast cell line , Detroit 551. Methods : The cytotoxicity was determined by colorimetric assays such as MTT assay or XTT assay. The microscopy was carried out to observe Detroit 551 cell line. Cells were incubated with various concentrations of benzoic acid in CQ incubator controlled with 37 c for 48 hours. Results : The cytotoxic effect of benzoic acid on Detroit 551 did not show a positive significance at 50 uM and 100 uM benzoic acid by MTT assay or X T T assay compared with control. MTTB and XTTg were 900.6 uM and 974.6 uM, respectively. In microscopic study, Detroit 551 treated with benzoic acid showed a slightly decreased cell number, while the morphological changes of cell was not showed. Conclusion : Above the results, the cytotoxicity of benzoic acid was midtoxicity on normal human skin fibroblasts cell line. Detrit 551
전주원,이병찬,한두석,서부일 대한본초학회 2004 大韓本草學會誌 Vol.19 No.1
Objective : This study was done to examine the cytotoxicity of styrax benzoin (SB) on human oral epithelioid carcinoma cell line (KI3). Methods : The cytotoxic effect of SB was measured by MTT assay or XTT assay. The microscopic study was performed to observe the mophorlogical changes of KI3 cells. Results : The cytotoxic effect of SB on KI3 cells showed a significant increase at 50 uM or 100 uM SB by MTT assay or XTT assay compared with control after cells were treated with various concentrations of SB for 48 hours. MTT_(50) and XTTg were 419.9 uM and 375.5 uM, respectively. In microscopic study, KB cells exposed to SB showed both the decreased cell number and the morphological changes. Conclusion : From these results, SB has a midcytotoxicity by the showing the decrease of cell number and the morphological changes in KJ3 by MTT and XTT assays.
서울의 Penicillinase Producing Neisseria gonorrhoeae 발생빈도(1997)
김재홍,문득곤,김정수,김용준,임동진,박상훈,김희성,이민수,송기훈,김갑형,김형석,성소영,이인섭,김석우,황지환,조창근,김경문,부태성 대한화학요법학회 2000 대한화학요법학회지 Vol.18 No.3
Background : In recent years, gonorrhea has been pandemic and remains one of the most common STDs in the world, especially in developing countries. Objective & Methods : For the detection of a more effective therapeutic regimen and assessing the prevalence of PPNG, we have been trying to study the patients who have visited the Venereal Disease Clinic of Choong-Ku Public Health Center in Seoul since 1980 by means of the chromogenic cephalosporin method. Results : In 1997. 99 strains of N. gonorrhoeae were isolated, among which 45(45.5%) were PPNG. Conclusion : The prevalence of PPNG in Seoul, which had been decreased to 39% in 1996 after a peak of 74.3% in 1993, is increased to 45.5% in 1997.
서울의 Penicillinase Producing Neisseria Gonorrhoeae 발생빈도(1996)
김재홍,황동규,전재홍,김윤석,김중환,김용준,이창균,임동진,김현수,조창근,김경문,박상훈,전우형,김희성,이호정,차명수,김갑형,김형석,김석우,황지환,박병순,권오상,이민수,송기훈,성소영,이인섭,부태성 대한화학요법학회 1999 대한화학요법학회지 Vol.17 No.2
Background : In recent years, gonorrhea has been panedemic and remains one of the most commom STDs in the world, especially in developing countries. Objective & Methods: For the detection of a more effective therapeutic regimen and assessing the prevalence of PPNG, we have been trying to study the patients who have visited the VD Clinic of Choong-Ku Public Health Center in Seoul since 1980 by means of the chromogenic cephalosporin method. Results: In 1996, 139 strains of N. gonorrhoeae were isolated, among which 53(39.0%) were PPNG. Conclusion: Our results suggests that after a peak of 74.3% in 1993, the prevalence of PPNG in Seoul is gradually declining.