와전류검사에 의해 검출된 증기발생기 전열관의 균열 특성

조찬희,남민우,김영호,양승한,이희종 한국비파괴검사학회 2004 학술대회 논문집 Vol.- No.-

The flaws detected at the steam generator tube of the Nuclear Power Plant are the wear indications by anti-vibration bars and circumferential cracks at the top of the tubesheet. It is easy to detect and size wear indications. Also the wear indications are commonly found at the steam generator tubes. However, the steam generator tube which includes crack indication is plugged because it is very difficult to predict the growth rate and the sizing error is high. The motorized rotating pancake coil has been used for the detection of circumferential crack since it is not possible to detect using the conventional bobbin probe. This paper describes the characteristics for the circumferential crack at the steam generator tubes of the Korean Standard Nuclear Power Plants.

퍼지 추론을 이용한 피로균열성장단계의 특성화

趙熙燦 충주대 2001 한국교통대학교 논문집 Vol.36 No.1

The estimation of fatigue crack growth and fatigue life prediction of machinery and structures is important in design.There are three stages of fatigue crack growth.Characterization of each stage cannot be performed manually because of the massive amount and fuzziness of data.This paper proposes a new algorithm for characterization of the stage of fatigue crack growth using fuzzy inference.This method enables us to mechanically characterization without manual computation.

테니스 라켓과 볼의 충돌현상에 대한 동적 특성의 해석

趙熙燦 忠州大學校 1999 한국교통대학교 논문집 Vol.34 No.1

There are a number of unclarified points regarding the impact phenomena and optimum design of tennis racket. This study presents nonlinear spring constants of ball and guts with racket frame and impact phenomena between a ball and guts and structural vibration of the racket. In order to get contact duration, which has an influence on the racket vibration, the ball and guts are modeled by constituent elements of free vibration with damping(single degree of freedom system). The contact duration is determined by the natural period of a composed ball-gut system. And the racket is modeled by free-ended beam.

境界要素法에 依한 兩端 V-노치를 갖는 有限平板의 應力解析

趙熙燦 忠州大學校 1988 한국교통대학교 논문집 Vol.22 No.-

B.E.M is ideally suited to the solution of many two-and three-dimensional problems in elasticity and potential theory for which finite elements are inefficient. Therefore, Engineers and Physical scientists are nowadays well conversed with B.E.M. In this paper, I considered the stress analysis of the finite plate with 2-edge, V-notches under static tension by personal computer and that compared with the conclusion of F.E.M for the same case. The purpose of this paper is confirmation of utility and efficiency of B.E.M and to analyze stress and S.C.F at the notch tip.

리스페달 정(리스페리돈 2㎎)에 대한 리스펜 정의 생물학적 동등성

조혜영,박은자,강현아,백승희,이석,박찬호,문재동,이용복 한국약제학회 2004 Journal of Pharmaceutical Investigation Vol.34 No.2

The purpose of the present study was to evaluate the bioequivalence of two risperidone tablets, Risperdal (Janssen Korea Co., Ltd) and Rispen (Myung In Pharm. Co., Ltd), according to the guidelines of Korea Food and Drug Administration (KFDA). The risperione release from the two risperidone formulations in vitro was tested using KP Ⅷ Apparatus Ⅱ method with various of dissolution media (pH 1.2, 4.0, 6.8 butter solution and water). Twenty four healthy male subjects, 23.33±2.10 years in age and 69.24±8.05 kg in body weight, were divided into two groups and a randomized 2×2 crossover study was employed. After one tablet containing 2 ㎎ as risperidone was orally administered, blood was taken at predetermined time intervals and the concentration of risperidone in serum were determined using HPLC method with UV detector. The dissolution profiles of two formulations were similar at all dissolution media. Besides, the pharmacokinetic parameters such as AUC_(t), C_(max) were calculated and ANOVA test was utilized for the statistical analysis of the parameters using logarithmically transformed AUC_(t), C_(max) and untransformed T_(max). The results showed that the differences between two formulations based on the Risperdal were 0.20, -1.29 and -11.09% for AUC_(t), C_(max) and T_(max), respectively. There were no sequence effects between two formulations in these parameters. The 90% confidence intervals using logarithmically transformed data were within the acceptance range of log(0.8) to log(1.25) (e.g., log(0.90)∼log(1.03) and log(0.84)∼log(1.09) for AUC_(t) and C_(max), respectively). Thus, the criteria of the KFDA guideline for the bioequivalence were satisfied, indicating Rispen tablet and Risperdal tablet were bioequivalent.

스트레인 게이지법을 이용한 박판의 응력확대계수 측정

조희찬 충주대학교 2006 한국교통대학교 논문집 Vol.41 No.-

The measurement of the K_I stress intensity factor by using a strain gauge is studied experimentally. The specimen of double edge cracked tension plate is used. Attached position and orientation of strain gauge should be seriously considered the size of plastic zone in crack tip in the single gauge method. The value of measurement is compared with the proposed equation and the result has turned out to be fairly satisfactory.

비유피-4 정(염산프로피베린 20㎎)에 대한 건일염산프로피베린 정의 생물학적동등성

조혜영,박은자,강현아,백승희,김세미,박찬호,오인준,문재동,이용복 한국약제학회 2004 Journal of Pharmaceutical Investigation Vol.34 No.5

The purpose of the present study was to evaluate the bioequivalence of two propiverine hydrochloride tablets. BUP-4 (Jeil Pharm. Co., Ltd.) and Kuhnil Propiverine Hydrochloride (Kuhnil Pharm. Co., Ltd.), according to the guidelines of the Korea Food and Drug Administration (KFDA). The propiverine release from the two propiverine hydrochloride formulations in vitro was tested using KP Ⅷ Apparatus Ⅱ method with a variety of dissolution media (pH 1.2, 4.0, 6.8 buffer solutions, water and blend of polysorbate 80 into pH 6.8). Twenty six healthy male subjects, 23.73 ± 2.79 years in age and 67.04 ± 7.93 kg in body weight, were divided into two groups and a randomized 2 x 2 cross-over study was employed. After one tablet containing 20 mg as propiverine hydrochloride was orally administered, blood was taken at predetermined time intervals and the concentrations of propiverine in serum were determined using HPLC method with UV detector. The dis-solution profiles of two formulations were similar at all dissolution media. Besides, the pharmacokinetic parameters such as AUC" C _(max) and T _(max) were calculated and ANOVA test was utilized for the statistical analysis of the parameters using logarithmically transformed AUC, C_(max), and untransformed T_(max). The results showed that the differences between two formulations based on the BUP-4 were 0.17%, 7.98% and 4.55% for AUC,, C_(max), and respectively. There were no sequence effects between two formulations in these parameters. The 90% confidence intervals using logarithmically trans-formed data were within the acceptance range of log(0.8) to log(1.25) (e.g., log(0.88)-log(l .12) and log(0.90)-log(l.15) for AUC, and _(max), respectively). Thus, the criteria of the KFDA bioequivalence guideline were satisfied, indicating Kuhnil Propiverine Hydrochloride tablet was bioequivalent to BUP-4 tablet.

다공질 실리콘을 이용한 미세 기계구조의 제조

조찬섭,이봉희,이종현,최규만 경북대학교 센서기술연구소 1990 센서技術學術大會論文集 Vol.1 No.1

Micromechanical structures such as cantilever beams and bridge array (~μm thick, 100~500 μm long) were fabricated by formation of porous silicon layer. The beam array of n/p samples have irregular etched surface and cusp. On the otherhand, beams of n/n^(+)/n structure have clear etched surface and no cusp.

이슬람가치와 여성발전의 딜레마 : 이집트, 모로코, 튀니지, 터키 4개국의 가족법 인식에 대한 비교연구 A Study through Changes of the Family Law in Egypt, Tunisia, Morocco, and Turkey

조희선,홍찬숙 한국이슬람학회 2004 한국이슬람학회논총 Vol.14 No.2

Among the four countries above the most consensus is observed in regard of the positive correlation between women's social status and development of the society. However the change of women's status in the family law depends on the social value. In Egypt and Morocco islamic identity is more emphasized, whereas the strong influence of western family law is most obvious in Turkey. In interview the Egyptians tend to resist the western influence with strong defence of their islamic family value. They believe the reformation of family law should be based on the interpretation of their religious code, which can be varied. Most of the Moroccan interviewee regard the bill of reformed family law in 2004 brings the islamic identity and promotion of women's status together. While in Egypt and Morocco the western influence on family law is generally denied, it is more accepted even with their strong identity as Muslim in Tunisia. Especially it appears that Tunisian government supports this moderate adoption of modern family law. In contrast the westernization of the family law is the only way of modernization in Turkey. But the westernized family law in Turkey seems to have conflict in reality, particularly in respect of kinship, rural life, and ignorance of uneducated women. In islamic value the promotion of women's right is limited to protection of motherhood and control of women's sexuality within the community. Muslims consider that the individualism in western family. results in irresponsible sexuality, which endangers the value of community. For Muslims the marriage is a holly contract, in which fairness is more important than equality of man and wife.

境界要素法에 依한 內壓을 받는 無限體의 應力解析에 關한 硏究

趙熙燦 忠州大學校 1987 한국교통대학교 논문집 Vol.21 No.-

B.E.M. is more powerful than other methods such as Finite difference method or finite element method. Therefore, Engineers and physical scientists are nowdays well conversed with B.E.M In this paper, I considered the stress analysis of circular hole under internal pressure in an infinite medium and that compared with the conclusion of mathematical theory of elasticity for the same case The purpose of this paper is to get more accurate than results that was gained by theory of elasiticity and the comprehension of B.E.M