크론병에 대한 CoPPLX의 방어효과에 대한 연구

이호학,김유림,문창기,이재일,양병윤,김종수,이정민,정재혁,안석진,박상준,김윤권,김소연,김영중,조민구,최영자,장성조 圓光大學校 醫科學硏究所 2005 圓光醫科學 Vol.20 No.1

師範大學 科學科 實驗實習敎育의 模型硏究

尹世重,李聖瑞,徐廷穆,崔鎬亨,蘇鮮燮 공주대학교 사범대학 과학교육연구소 1984 과학교육연구 Vol.16 No.1

師範大學의 生物 實驗 敎育의 改善 方向을 강구하기 위하여 전국 15개 師範大學의 生物敎育科에서 敎育하고 있는 실험 실습을 학점을 중심으로 조사하였고 아울러 20개 非師範系 대학의 생물 실험실습 학점도 조사하여 비교하고, 분석 하므로서 다음과 같은 몇 가지 결과를 얻게 되었다. 1) 師範系 生物 敎育科의 전공 학과중 實驗 實習 배정시간 및 학점수를 늘려 나가야 하겠다. 2) 探究學習 지도 能力을 保有할 수 있도록 實驗 實習 指導 改善 方法을 강구해야겠다. 3) 基礎 共通科目은 3과목 모두를 최소한 1학기는 이수토록 해야 하고 반드시 실험 실습을 竝行 하여야 하겠다. A study for the model of the laboratory experiment curriculum in teacher's college seience was done. Because of individual characteristics in each field in department sc-ience education, the model was not necessarily unique. However, the common elements of frame in this model were suggested as follows : 1. The ratio of laboratory experiment's credits and total major credits. 2. The ratio of basic common laboratory experiment's credits (basic physics, basic chemistry, basic biology, and basic earth science) and total laboratory experiment's credits. 3. Credits and course name of laboratory experiments charactoristic for the science education in teacher's college. 4. Suggestion of the experimental guide for an inquiry learning.

BMS 수리모형하에서 시스템의 수리효과 및 고장강도함수의 모수추정

윤원영,정석주,정일한,김종운,정상욱 한국경영과학회 2000 韓國經營科學會誌 Vol.25 No.4

Estimation problems of parameters of the failure process and the repair effect in repairable systems are considered. We propose estimation procedures in repairable systems without preventive maintenances. The fallure process is modeled by a proportional age reduction model (Brown. Mahoney, Sivazlian [5]) which is able to consider both aging and repair effects. Maximum likelihood method is used to estimate the repair effect and parameters of intensity function simultaneously. Simulations are performed to evaluate the accuracy of estimators. A numerical example is also presented.

유동성 복합레진의 마모저항성에 관한 연구

윤연희,김정욱,이상훈,한세현 大韓小兒齒科學會 2002 大韓小兒齒科學會誌 Vol.29 No.2

시술시간을 줄이는데 유리한 재료인 유동성 복합레진을 유구치부에 사용하려고 고려할 때 중요한 물성 중 하나는 마모저항성이다. 이 연구의 목적은 유동성 복합레진의 마모저항성을 일반복합레진의 마모저항성을 비교하는 것이다. 실험에 사용된 유동성 복합레진으로 1군에서는 Arabesk flow (VOCO, Germany), 2군에서는 Tetric flow (Vivadent, Liechtenstein), 3군에서는 Aeliteflow (Bisco, U.S.A), 4군에서는 Filtek flow (3M Dental Co, U.S.A)을 사용하였으며 대조군으로 사용한 5군의 복합레진은 Z100 (3M Dental Co, U.S.A)이었다. 시편들(n=10)은 두께 2mm, 지름 5mm의 원통모양으로 제작하여 마모시험 전 37℃의 증류수에서 7일 동안 담가 놓았다. 제1소구치와 레진시편을 MTS 시스템에서 2Hz로 50,000회 접촉, 마모시켰다. 마모시험시 lateral excursion은 0.4mm, 교합력은 2-100N의 조건이었다. 마모시험후 마모된 부피, 최대마모깊이, 재료자체의 표면경도를 측정하였고 마모되지 않은 표면과 마모가 일어난 표면을 주사전자현미경으로 관찰하였으며 다음과 같은 결과를 얻었다. 1. 마모된 부피는 3군에서 가장 적었고 4군에서 가장 많았으며 3군<1군<2군<5군<4군의 순서로 증가하였다. 2. 3군, 1군, 2군, 5군이나 4군에 비해 통계적으로 유의하게 마모부피가 적었다(P<0.05). 그러나, 3군, 1군, 2군 사이에서와 5군, 4군 사이에서는 각각 통계적으로 유의한 차이가 없었다. 3. 최대마모깊이는 1군에서 가장 낮았고, 4군에서 가장 깊었으며 1군<3군<5군<2군<4군의 순서로 증가하였다. 4. 5군의 표면경도는 다른 유동성 복합레진군에 비해 통계적으로 유의하게 높았으나(P<0.05). 마모부피나 최대마모깊이와는 통계적으로 유의한 상관관계를 보이지 않았다. 5. 마모되지 않은 표면과 마모가 일어난 표면을 주사전자현미경으로 관찰한 결과, 유동성 복합레진군과 5군 사이에 마모양상이 다르게 나타나는 것을 볼 수 있었다. When we use the flowable resin on the primary molars for quick handling, one of the most important property is the wear resistance. This study was performed to compare the wear resistance characteristics of four flowable composite resins [Arabesk flow (group 1), Tetric flow (group 2), Aeliteflow (group 3), Filtek flow (group 4)] to that of one control composite resin [Z100 (group 5)]. Specimen discs(n=10), 10mm wide and 2mm thick, were stored in distilled water at 37℃ for 7 days prior to testing. The specimens were subjected to 50,000 strokes at 2Hz on the MTS system. During the test, the following parameters were maintained: the ;atera; excursion at 0.4mm, occlusal force at 2-100N with a force profile in the form of a half sine wave. The measurements of volume loss, depth of wear, and Vicker's hardness number of composite resins, and SEM obserbations of the polished and abraded surfaces were established. One-way ANOVA and Scheffe's multi-ple comparison test were employed to detect statistically significant differences among the flowable composite resin group and the control composite group at P<.05. The following results were obtained: 1. Group 3 showed the least volume loss, while group 4 showed the greatest. The mean volume loss increased in the following order: group 3<group 1<group 2<group 5<group 4. 2. Group 3, group 1, and group 2 showed significantly lesser volume loss compared to group 5 and group 4(p<0.05). However, There was no statistically significant difference among group 3, group 1 and group 2. There was no statistically significant difference between group 5 and group 4. 3. Group 1 showed the shallowest depth of wear, while group 4 showed the deepest. The mean depth of wear increased in the following order: group 1<group 3<group 5<group 2<group 4. 4. Group 5 showed significantly highest hardness value compared to the flowable composite resin groups(p<0.05), but there was no correlation between wear resistance and Vickers hardness number. 5. SEM observation of the unworn and worn surfaces revealed the differences in the wear appearance between the flowable composite resin groups and the control.

효율적인 일정계획에 의한 제조실행 제어

정인성,이윤상,이상복,왕지남 대한설비관리학회 2004 대한설비관리학회지 Vol.9 No.4

In this paper, we develop scheduling system under MTO (Make-To-Order) Production and implement it to real application. Generally, scheduling system is regarded as company specific problem such that the required business logic might be different within a same industry. The differences are caused by different constraints of each company requirements. Company specific algorithms are commonly employed using rule-base or heuristic procedure. Based on these characteristics, heuristic procedure are developed and implemented for developing MES (manufacturing execution system). The proposed approach are applied to real industry and proved as an efficient approach in terms of practical views.

압저항형 스마트 실리콘 압력 센서의 설계

정후민,신윤권,조상복,이종화 울산대학교 2001 공학연구논문집 Vol.32 No.2

압저항형 스마트 실리콘 압력 센서를 0.6 ㎛ 이중 폴리 실리콘 이중 금속 CMOS 공정으로 구현하기 위하여 설계하였다. 이 스마트 실리콘 압력 센서는 압저항형 저항기들로 된 휘스톤 브리지를 갖는 다이아프램과 op-amp, A/D 변환기, 및 UART 회로 등의 주변회로 들로 구성되어 있다. 브리지 회로의 출력 전압과 압력에 의한 기계적 응력 사이의 관계를 COSMOS-M 상용프로그램으로 다이아프램의 응력 분포를 모의실험하여, 압저항기의 최적의 위치와 크기에 대한 연구를 하였다. CMOS op-amp 회로는 규정된 출력 특성을 얻기 위하여 크기가 다른 트랜지스터들로 설계하여 HSPICE로 모의실험하여 최적화 시켰다. A/D 변화기 회로는 가능한 칩 면적을 줄이기 위하여 서브 레인징 기법과 신경 MOSFET 구조를 이용하여 설계하였다. UART회로는 VHDL 소스 코드와 셀 라이브러리를 이용하고 Synopsys로 합성하여 설계하였다. 회로의 물리적 레이아우트 설계는 Mentor 틀로 설계하였다. 그러나 온도보상회로와 출력오프셋 문제는 아직 해결하지 못하고 다음에 연구할 예정이다. A piezoresistive smart silicon pressure sensor is designed to implement with 0.6 ㎛ double-polysilicon double-metal CMOS precess. This smart pressure sensor is composed of a diaphragm with piezoresistive resistors' Wheatstone bridge and the peripheral circuitry of op-amp, A/D converter and UART. The relationship between the output voltage of the bridge circuit and the mechanical stress by applied pressure was studied by simulating the stress distribution on the diaphragm with COSMOS-M package program to optimize the size and position of piezoresistors. The CMOS op-amp circuit was designed with different CMOS transistor sizes to obtain the defined op-amp output characteristics and simulated with HSPICE. The A/D converter was designed using neuron MOSFET structure and sub-ranging method to minimize the chip area. The UART circuit was designed by using VHDL source code and cell library and by synthesizing with Synopses and the physical layout of the circuit was designed with Mentor tools. The problems for temperature compensation and the output voltage offset were not yet considered.

로보트 매니퓰레이터 시스템을 위한 지능 제어기

정성옥,이윤배 조선대학교 기초과학연구소 1991 自然科學硏究 Vol.14 No.1

With growth of computer science, researches and developments on robot problem-solving have led to many ideas about expert control in artificial intelligence. This paper describes the distributed system of intelligent controller for robot manipulator system with 3 joints. In this paper, I present the result of the experiments which indicate how the motion of controlled robotics might be achieved through similar pattern-based paradigms, implemented for real-time operations on robot manipulator with artificial intelligent methodology. For intelligent controller, a knowledge base system is constructed with the knowledge base, inference engine and user interface to determine the control signals required to obtain the desired results.

대장암 세포주 SNU C2A에서 etoposide처리에 의한 apoptosis 유도

정지연,나윤숙,정호철,오상진 Official Journal of the Korean society for immunol 2001 Immune Network Vol.1 No.3

저체중 또는 과체중 청소년에서 캠프 프로그램을 이용한 영양 교육효과에 관한 연구

성미경,승정자,류화춘,박재년,박동연,최미경,조경옥,최선혜,이윤신,김유경,이은주 대한지역사회영양학회 2003 대한지역사회영양학회지 Vol.8 No.4

This study was performed to evaluate the effectiveness of a nutrition education program developed for nutritionally imbalanced adolescents. A summer nutrition camp was held for 23 overweight and 16 underweight subjects. Its effectiveness with regard to was evaluated at the end of the camp and 6 months later. Nutrition knowledge, nutritional attitude, food behavior, nutrient intake, exercise habit and ideal body figures desired by the subjects. The results showed significantly higher nutrition knowledge scores at the end of the camp as compared to those obtained prior to the camp program, and these scores were maintained for at least six months. Nutrition attitude scores also improved after the education program, and these improved scores also lasted for 6 months. However, the food behavior scores measured 6 months after the education program were not significantly different from those obtained prior to the camp. Also, the exercise habit, the ideal body figures and the body figures desired by the subjects remained unchanged. When nutrient intakes of subjects were assessed before the program and 6 months later, the mean daily vitamin C intake was significantly increased after the education program. Also, the intake of iron from plant food sources increased in the overweight subjects, while less iron from animal source were consumed by the underweight subjects. Both groups tended to consume more vegetables and fruits 6 months after the education program which may have contribute to the higher vitamin C and plant-based iron intakes. These results indicate that a 4-day nutrition education camp program sustained changes in nutrition knowledge and nutrition attitude for 6 months. The increased intake of vegetables and fruits was also achieved through this education program. However, changes in dietary behavior in adolescents may require repeated education.

牛肉과 豚肉의 乾燥方法에 따른 組織學的 變化에 關한 硏究

윤정의,이상건,김태전,양철영 서울保健大學 1987 論文集 Vol.7 No.1