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고연진,계기성,구철인 朝鮮大學校 口腔生物學硏究所 2000 口腔生物學硏究 Vol.24 No.2
In the field of dentistry. The importance on the joining of dental casting body is becoming growing. Especially, with the recent development of implant-retained prosthesis. Which may often be long, fabricating a one-piece casting incorporating machined parts and having these machined surfaces accurately and passively fit the implant superstructure becomes even more difficult. Therefore, for a better fit, making multiple castings and then joining them has being promoted. Generally, soldering has been a conventional way to join metals. Recently, as laser-welding is being introduced into the field of dentistry. there is the increasing number of cases where laser-welding has been used as the connecting method. This research has compared and studied the tensile strength and examined the fractured surface under metallographic microscope. after the connection has been made with soldering and laser-welding using the various combinations of the precious and nonprecious alloy. Through this study, following results were obtained: 1. It was found that when connecting the nonprecious-nonprecious alloys, the tensile strength of the laser welded group(Group Ⅳ) showed the noticeably higher result compared with that of the soldered group(Group Ⅰ) (P<0.05). 2. When connecting the precious-precious alloys, the tensile strength of soldered group(Group Ⅱ) showed higher result compared with that of the laser-welded group(Group Ⅴ), however, there was no noticeable differences(P>0.05). 3. When connecting the precious-nonprecious alloys, the tensile strength of the laser-welded group(Group Ⅵ) showed noticeably higher value than that of the soldered group(Group Ⅲ)(P<0.05). The tensile strength of the nonprecious-nonprecious laser-welded group(Group Ⅵ) showed the most highest value compared with all other tested group, and the tensile strength of the precious-non precious soldered group(Group Ⅲ) recorded the most lowest value. 4. The microscopic examination of the fractured surface revealed that all the soldered groups joined with the nonprecious alloy(group(Group Ⅰ, Ⅲ) fractured adhesively between the solder and nonprecious alloy. The four of the precious-precious soldered group(Group Ⅱ) fractured cohesively and the one of them fractured cohesively and adhesively. Many porosities were observed at the fracrured surface. 5. The precious-nonprecious laser-welded group(Group Ⅵ) fractured cohesively in the precious alloy. Although the fractured surface showed free of porosities, there was some regions not welded in the center of the fractured surface. From the result of the above research, it was considered that the problems that had occurred previousely in the soldering between the nonprecious and the nonprecious alloys and between the precious and nonprecious alloys could be improved by the utilization of the laser-welding.
고연진 京畿專門大學 2000 京畿專門大學 論文集 Vol.- No.28
The esthetic dentistry is a rather new field in dentistry that has begun to gain attention recently. In contrast with the past dental treatment where the main objective was to treat pain, ailment and to rehabilitate the function of the teeth, one of the important objectives of dentistry has now been on the esthetic aspect of the face and teeth, as the economic situation became more affluent as days goes on and as the general desire of the people to have beautiful teeth. Matter of factor, a large number of individuals seek dental care because of esthetic reasons, that is the desire to look more attractive. Therefore, since the improvement the esthetics of the teeth has derived from the desire to be shown attractive, it could be said that the objective of the esthetic dentistry is to gain attractive smile by harmony of esthetic teeth with one's facial appearance. Futhermore esthetics and function go hand in hand, so they are always satisfied simultaneously. Therefore to obtain the objective, the dentists need not only the scientific analysis on the beautiful smile harmonized with the teeth, but also greater understanding of artistic elements in esthetic principles. This article reviewed the literature published by both the local and overseas dental academy and studied the clinical considerations in esthetic dentistry hoping this could be of help when application of cosmetic dental treatment.
고연진,정현희 한국미술치료학회 2010 美術治療硏究 Vol.17 No.3
본 연구는 간편하고 객관적인 동적가족화의 평가기준을 개발하고자 하였다. 이를 위해 Fury(1996)의 가족화 평가기준과 Burn와 Kaufman의 동적가족화 평가기준을 수정·보완하여, 유용성을 검증하고자 하였다. 연구대상은 초등학교 저학년 아동 108명이었다. 본 연구의 결과를 요약하면 다음과 같다. 첫째, 평가기준은 4차의 과정을 거쳤다. Fury의 하위변인과 각 점수체계의 모호함을 줄이기 위해, 단어와 내용의 수정과 보완, 색 사용 제외, 5점 척도화, 하위변인에 대한 핵심단어의 요약을 하였다. Burn와 Kaufman의 동적요소를 첨가하였다. 완성된 평가기준의 채점자간신뢰도는 90.8, 채점자내신뢰도는 91.7.이었다. 둘째 동적가족화의 평가기준 신뢰도를 알아보기 위해 하위변인별로 내적합치도인 Cronbach α를 산출하였다. 하위변인의 Cronbach α가 .82∼. 91로 나타났다. 셋째, 수렴타당도로 하위변인 간의 상관관계를 보았다. 하위변인 간에 유의한 상관관계를 보여, 각 하위변인이 동적가족화의 구성요인임을 보여주었다. 공인타당도를 알아보기 위해 하위변인과 가정적자아존중감, 정서적친밀도와의 상관관계를 보았고, 의미있는 상관관계를 보여주었다. 변별타당도로 가정적자아존중감과 정서적친밀도가 높은 집단과 낮은 집단이 동적가족화 점수에서 의미있는 차이가 있는가를 보기 위해 t-test하였고, 집단간에 의미있는 차이를 보여주었다. 따라서 동적가족화 평가기준이 유용하다고 할 수 있다. This study aims to develop objective rating scales for Kinetic Family Drawing (KFD). The rating scales based on Fury(1996)' family drawing scales & Burn and Kaufman(1970)'s kinetic family drawing scales. The subjects for this study were 108 children of 2-3rd grade selected from elementary schools. The results were as follows: First, ambiguity & similar words in variables and likert-criteria by Fury' Family Drawing scales were revised. And cloring was excluded. The kinetic significance by Burn and Kaufman was added. The 5 likert-criteria was made. Also, keywords in each variable were defined. The inter-rater reliability was 90.8 and intra-rater reliability was 91.7. Second, as the reliability, the internal consistency of variables showed Cronbach α .82~.91. This scales showed relatively high internal consistency. Third, In the case of convergent validity, Pearson’s correlation were examined. The correlations among the variables were significant. In the case of concurrent validity, Pearson’s correlation between KFD & family self-esteem, between KFD & emotional intimacy were evaluated. And KFD had significant relationship with family self-esteem & emotional intimacy. For discriminant validity, t-test was used. High groups in family self-esteem & emotional intimacy had significantly positive scores in KFD than low groups. As a result, KFD rating scales is considered to be objective and useful.
Development of a FRET-based High-Throughput Screening System for the Discovery of Hsp90 Inhibitors
오상미,정영선,김종훈,이한재,고연진,박승범 대한화학회 2011 Bulletin of the Korean Chemical Society Vol.32 No.9
A FRET-based high-throughput screening system was developed for the discovery of competitive smallmolecule Hsp90 inhibitors. The biarsenical fluorescein derivative FlAsH and dabcyl-conjugated Hsp90inhibitor GM were employed as the FRET donor and quencher, respectively. The spatial proximity perturbation between FlAsH-labeled Hsp90N and GM-dabcyl upon treatment of a small molecule led to changes in the FRET-induced fluorescence, monitored in a high-throughput fashion.