수종의 봉합사의 조직반응에 관한 비교연구

김재석,박준봉,이만섭,허익,Kim, Jae-seok,Park, Joon-Bong,Lee, Man-Sup,Herr, Yeek 대한치주과학회 2002 Journal of Periodontal & Implant Science Vol.32 No.1

The purpose of this study is to evaluate histologically the tissue response and resorption of various nonresorbable and resorbable suture materials used for periodontal surgery, using a subcutaneous model on the dorsal surface of the rat. In this study, 10 Sprague-Dawley male rats (mean BW 150gm) were used and the commercially available materials included polyglactin 910, pain gut, nylon, e-PTFE. Animals were sacrificed at 3 days, 1, 2 and 4 weeks after implantation of various nonresorbable and resorbable suture materials. Specimens were prepared with Hematoxylin-Eosin stain for light microscopic evaluation. The results of this study were as follows: 1. Resorption : The resorption of plain gut was showed at 1 week after implantation, was lost their structure and almost resorbed at 4 weeks. The resorption of polyglactin 910 was started at 2 weeks and slowly absorbed untill 4 weeks. 2. Tissue response : Plain gut showed persistent and severe inflammatory reactions from 3 days to 4 weeks. Polyglactin 910, e-PTFE and nylon showed mild inflammatory reactions. Suture material should be biocompatible and be able to be functioned until tissue tensile strength reaches maximum level. In this study, polyglactin 910, nylon and e-PTFE are considered to be proper suture materials for periodontal surgery.

영상의 증강 : Image Enhancement

김재석,Kim, Jae-Seok The Korean Society for Digital Imaging in Medicine 1998 대한디지털의료영상학회논문지 Vol.4 No.1

Inelastic Transient Dynamic Analysis of Two- and Three-dimensional Stress Problems by Particular Integral Boundary Element Method

김재석,박경호,Kim, Jae-Suk,Owatsiriwong, Adisorn,Park, Kyung-Ho Computational Structural Engineering Institute of 2008 한국전산구조공학회논문집 Vol.21 No.4

본 연구는 2차원 및 3차원 동적 탄소성 응력 해석을 위한 특수 적분해 경계요소법의 공식 개발을 제시한다 정적 탄성에 대한 기본식이 일반해를 구하는데 이용되었으며, 전체형상함수 개념을 이용하여, 변위율과 traction rate의 특수 적분해를 구함으로써 지배 방정식의 가속도 부분을 근사화시켰다. 시간 적분을 위하여 Houbolt 시적분 방법을 이용하였으며, Newton-Raphson 알고리즘을 이용하여 수치 연산을 행하였다. 제시된 공식에 따른 예제 해석을 통하여 그 방법의 유효성과 정확성을 설명하였다. The particular integral formulation for two(2D) and three(3D) dimensional inelastic transient dynamic stress analysis is presented. The elastostatic equation is used for the complementary solution. Using the concept of global shape function, the particular integrals for displacement and traction rates are obtained to approximate acceleration of the inhomogeneous equation. The Houbolt time integration scheme is used for the time-marching process. The Newton-Raphson algorithm for plastic multiplier is used to solve the system equation. Numerical results of four example problems are given to demonstrate the validity and accuracy of the present formulation.

영상분석 II : Image Analysis

김재석,Kim, Jae-Seok The Korean Society for Digital Imaging in Medicine 1998 대한디지털의료영상학회논문지 Vol.4 No.1

지혜 깊어지는 건강: 활기찬 실버 세대 -어르신 건강 음식물 씹는 치아에서부터

김재석,Kim, Jae-Seok 한국건강관리협회 2011 건강소식 Vol.35 No.5

건강한 치아는 '오복' 중의 하나로 꼽힌다. 그 이유는 아마도 '잘 먹기'가 그만큼 중요하기 때문일 것이다. 우리 몸의 모든 기관이 정상적으로 작동하기 위해서 영양분이 제대로 전달되어야 하고 그 시작은 '음식물 씹기'에서 시작되기 때문이다 치아의 가장 중요한 임무는 삼키기 쉽도록 음식을 자르고 부수는 것이다 거기에 더해 음식의 맛도 느낄 수 있게 도와준다. 여러 개의 치아를 잃게 되면 임플란트나 틀니치료를 받게 된다. 하지만 아무리 좋은 임플란트, 틀니라 하더라도 건강한 치아와 같을 수는 없다. 치아를 건강하게 보존하고 유지하는 것이야말로 '건강함'을 유지하기 위한 시작이라 볼 수 있다.

뇌동맥류 코일 색전술 시 Bismuth 차폐체 설치에 따른 입사 표면 선량 평가 및 화질 평가

김재석,김영길,최재호,Kim, Jae-Seok,Kim, Young-Kil,Choi, Jae-Ho 한국정보통신학회 2019 한국정보통신학회논문지 Vol.23 No.7

인체공학적으로 개발된 Bismuth 차폐체를 뇌동맥류 코일 색전술에 적용함으로써 의료방사선 피폭으로부터 두피 및 수정체의 방사선 피폭을 감소시키고자 하였다. 광자극 형광 선량계를 이용하여 후두부, 양쪽 측두부, 양쪽 수정체부, 코 끝부를 개발된 Bismuth 차폐체를 사용 전 (A그룹) 후 (B그룹)로 측정하여 입사 표면 선량을 분석하였다. Bismuth 차폐체를 사용할 경우 화질에 대한 평가를 Signal to noise ratio (SNR)과 Contrast to noise ratio (CNR) 분석을 했다. A 그룹과 B 그룹의 입사 표면 평균 선량을 비교한 결과 A 그룹에 비해 B 그룹에서 평균 26.92% 감소되었다. CNR과 SNR의 분석은 로드맵과 디지털 감산조영 모두 동일하게 측정되었다. Bismuth 차폐체의 사용은 뇌혈관 중재적 시술 후 나타날 수 있는 일시적 탈모 및 기타 확률적 영향에 따른 방사선 장애를 화질의 저하 없이 감소시킬 수 있는 대안이 될 것으로 사료된다. By applying an ergonomically developed Bismuth shield to the endovascular treatment of cerebral aneurysm the radiation dose of the scalp and lens from the medical radiation exposure was reduced. The enrtance surface dose was analyzed by measuring the occipital parts, bilateral temporal parts, bilateral quadriceps, and nasal tip of the developed bismuth shield using a photostimulable fluorescence dosimeter before (Group A) before use (Group B). Signal to noise ratio (SNR) and contrast to noise ratio (CNR) analysis were used to evaluate the image quality when Bismuth shielding was used. The mean entrance surface dose of A group and B group was 26.92% lower than that of A group. The analysis of CNR and SNR was the same for both Roadmap and DSA. The use of Bismuth shielding is an alternative that can reduce the radiation impairment due to temporary hair loss and other stochastic effects that may occur after cerebrovascular intervention.

Digital Imaging Communications in Medicine(DICOM)

김재석,Kim, Jae-Seok The Korean Society for Digital Imaging in Medicine 1998 대한디지털의료영상학회논문지 Vol.4 No.1

비스무스 차폐체의 유방 차폐율 분석

김재석,Kim, Jae Seok 한국정보통신학회 2020 한국정보통신학회논문지 Vol.24 No.9

유방 X선 촬영 장치를 이용한 유방 촬영을 실시할 때 발생되는 불필요한 피폭 선량을 경감시키기 위해 비스무스로 제작한 차폐체를 촬영 부위의 반대 측 유방에 적용했을 때 차폐율 분석을 실시하였다. 오른쪽, 왼쪽을 압박하였을 때 CC와 MLO 검사 시 압박되지 않는 유방의 산란 선량을 알아보기 위하여 비스무스를 차폐하지 않았을 때(Not used : NU그룹)와 차폐했을 때(Used : U그룹)로 구분하여 실험을 진행하였다. NU 그룹의 평균선량은 9.568μSv이었고, U그룹의 평균 선량은 1.038μSv이었다. 비스무스 차폐체 사용 전후의 평균 측정 선량은 89.15% 감소되었다. 유방 촬영용 비스무스 차폐체를 사용하면 산란 방사선을 차폐하여 방사선에 의한 노출을 최소한으로 유지할 수 있다. In order to reduce unnecessary exposure doses generated when mammography is performed using a mammography device, a shielding ratio analysis was performed when a self-made shielding body made of bismuth was applied to the breast opposite to the imaging site. In order to determine the scattering dose of uncompressed breasts during CC and MLO tests when the right and left are compressed, the experiment is divided into when bismuth is not shielded (Not used: NU group) and when shielded (Used: U group). Proceeded. The average dose of the NU group was 9.568μSv, and the average dose of the U group was 1.038μSv. The average measured dose before and after the use of the bismuth shield was reduced by 89.15%. The use of a bismuth shield for mammography can shield scattered radiation and keep exposure to radiation to a minimum.

형성기 한국 근대극에서 <김영일의 사>의 위치

김재석 ( Jae Suk Kim ) 한국연극학회 2013 한국연극학 Vol.1 No.50

This paper is aimed at examining the characteristics as a modern drama which Kim Youngileui sa (Kim Youngil`s Death) by Cho Myunghee has and finding out which position it can occupy in the history of Korean modern drama. Kim Youngileui sa (Kim Youngil`s Death) performed in 1921 has characteristics as a modern drama fully ; in this work the awareness of colonial modernity subject is obviously revealed and it also ensures reality. Cho Myunghee tried to come up with the direction towards which colonial modernity subjects go in the premodern situation of colony through Kim Youngil`s tragic death. He insisted that ideal society should be constructed through religious love, which shows that he was influenced by Tolstoy`s thought. The reality appeared in Kim Youngileui sa (Kim Youngil`s Death) could be acquired by creative method of naturalistic drama. Cho Myunghee took author`s viewpoint who was observing Kim Youngil`s life led in the conflict of pre modern society. He succeeded in consolidating the reality of drama by showing coherently the process of Kim Youngil death. Kim Youngileui sa (Kim Youngil`s Death) had a great influence on forming Korean modern drama and its performance played an important role in settling down the naturalistic drama in colonized Chos?n. The people watching the performance on tour of Kukyesulhyuphoe, the association of drama art took Kim Youngil, the protagonist`s death as the symbol of national death. The experience that only reproducing the situation of colonized Chos?n realistically on the stage could make the audience much impressed could caused the dramatists later to recognize the value of naturalistic drama certainly. The audience`s explosive reaction created by connecting Kim Youngil`s death with their sentimental emotion worked as the opportunity to expand the social drama, It is another effect to look upon a protagonist as a suffering one who went through agony in the conflict of colony. Considering this, it can be estimated that Korean modern drama made an actual start from Kim Youngileui sa (Kim Youngil`s Death).

일반논문 : 김우진의 표현주의극 창작 동인과 그 의미

김재석 ( Jae Suk Kim ) 한국문학언어학회( 구- 경북어문학회) 2008 어문론총 Vol.49 No.-

The aim of this paper is to analyze the value which Kim Woo-jung`s plays of expressionism have in the history of theater. His works of expressionism are Nanpa (ship reck) and Sandoeji (wild boar). He said that an artist should analyze every problem in reality throughly and then decide the direction of his own creation. With this perception, he began to explore the theories on the plays of expressionism and naturalism and tried to experiment on their possibilities with these two works. Nanpa and Sandoeji are the plays on the quester. The poet in Nanpa and the Cheo Won-bong in Sandoeji are suffering by the contradictions given to them. With the help of assistant, they clear grasp the fundamental causes and at last come to find out the new way they will go. Through these two works, Kim Woo-jin emphasized that human is the mortal being who doesn`t yield to the contradictory environment given to himself but have to overcome them. Kim woo-jin`s plays of expressionism have the value, in that they gave the individuality to the Korean plays of those days which were subordinated to Japan. He also obtained good results since he made the plays of future in colonized Korea be in accord with the currents of world play history through the plays of expressionism. But he failed to ascertain the fact that the plays of expressionism were the suitable for people in colonized Korea. It`s because that the contradictory environment which the poet in Nanpa and the Cheo Won-bong in Sandoeji faced were different that of the colonized Korea. It was also the limitation which Kim Woo-jin could not help having when he created the works of expressionism under the Japanese censor system. Because he knew this limitation, it seemed that he created the plays of naturalism at the same time.