사영필터를 이용한 2차원 트러스 구조물의 2단계 손상 추정

임은지,서일교 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.2(구조계)

In this paper, a study of 2-step damage measures for 2-Dimensional truss structures using the Projection filter theory is presented. Many researchers are interested in inverse problems and one of solution procedures for inverse problems that are very effective is the approach using the filtering algorithm in conjunction with numerical solution methods. In this paper, the Projection filtering in conjunction with structural analysis is applied to the identification of damages in 2-D truss structures. And, damage detection take use of 2-step damage assessment method. First, kinetic energy change ratio are used to find damage region including damaged member and then detect damaged member in damage region. The effectiveness of proposed method is verified through the numerical example.

모수가 미지인 Weibull 분포에 대한 수정된 적합도 검정

趙敎永,林恩福 경북대학교 과학교육연구소 1993 科學敎育硏究誌 Vol.17 No.-

The Kolmogorov-Smirnov, Crame´er-von Mises, and Anderson-Darling Statistics are considered for testing the goodness of fit of the two-parameter Weibull distrubution. The statistics for testing the goodness of fit a completely specified distribution are modified by replacing the Weibull parameters by their maximum likelihood estimates. Also considerde are two tests due to Mann, Scheuer, and Fertig(1973), and to Smith and Bain(1976). Tables of critical values are represented for the Kolmogorov-Smirnov, Crame´er-von Mises, and Anderson-Darling statistics. The results of a power study are represented comparing all five tests.

사영필터이론을 이용한 트러스 구조물의 손상 검출

서일교,임은지,은희창 제주대학교 공과대학 첨단기술연구소 2002 尖端技術硏究所論文集 Vol.13 No.1

In this paper, a study of damage detection for 2-D truss structures using the Projection filter theory is presented. Many researchers are interested in inverse problems and one of solution procedures for inverse problems that are very effective is the approach using the filtering algorithm in conjunction with numerical solution methods. In filtering algorithms, the Kalman filtering algorithm is well known and have been applied to many kind of inverse problems. In this paper, the Projection filtering in conjunction with structural analysis is applied to the identification of damages in 2-D truss structures. The natural frequencies and modes of damaged truss model are adopted as the measurement data. The effectiveness of proposed method is verified through the numerical example.

위절제술 환자의 표준진료지침 개발 및 적용 효과

김은희,김철규,이순교,김순덕,이혜옥,권정순,이경미,이민미,심순미,유용만,신종식,강은희,이상일,김병식,오성태,육정환,박수길 한국의료QA학회 2003 한국의료질향상학회지 Vol.10 No.2

Background : Gastric cancer is the most common malignant tumor in Korea. surgical operation is one of the major treatment modalities for gastric cancer patients. Therefore, gastrectomy is one of the most common procedures in General Surgery. There were variation in length of hospital stay and medical treatment for gastrectomy between three surgeons at Asan Medical Center. Clinical pathways have received considerable attention as a tool for recucing the medical practice variation, increasing the efficiency of care process, and improving the quality of care. The aim of this study was to evaluate the effect of a clinical pathway for gastrectomy in gastric cancer patients. Methods : The clinical pathway for gastrectomy was developed and implemented by a multidisciplinary group in Asan Medical Center. A computerized clinical pathway program was developed and revised after a pilot test. A total of 145 patients underwent gastrectomy by three surgeons at Asan Medical Center. We compared the length of hospital stay, patient satisfaction, and unplanned readmission rate between the pre-pathway group(n=67) and the post-pathway group(n=78). We also investigated the degree of satisfaction among the physicians and nurses who were main end-users of the clinical pathway. Results : The clinical pathway was applied to all target patients. The average length of hospital stay was shortened from 12.7days to 10.6days(p<0.01). The degree of patient satisfaction with the care process changed from 90.3% to 89.2% after the implementation of the clinical pathway, but the difference was of satistically significant(p=0.761). Unplanned readmission rate was 2.9% in the pre-pathway group. More than 90% of physicians and nurses answered that the clinical pathway had been a useful tool in their medical practice. Conclusions : The findings of the study demonstrated that implementation of the clinical pathway for gastrectomy produced substantial reduction in the length of hospital stay while improving the quality of patient outcomes. The computerized clinical pathway program can be used as one of the powerful patient management tools for reducing the practice variations and increasing the efficiency of care process in Korea hospital settings.

의복소비 및 활용실태 분석

趙必嬌,徐英淑,具銀鈴 服飾文化學會 1997 服飾文化硏究 Vol.5 No.2

청소년의 유행채택 행동 : 의복관여의 관점에서

구은영,조필교 복식문화학회 2001 服飾文化硏究 Vol.9 No.4

This study focuses on fashion adoption behavior of adolescents. The impact of their clothing involvement factors and socio-demographic factors on their fashion adoption behavior was examined. Three core issues were identified for empirical test: 1) Elements of clothing involvement for adolescents; 2) Fashion adoption behavior of adolescents; 3) Impact of clothing involvement elements on fashion adoption behavior. The Likert Type questionnaires were used to measure clothing involvement and fashion adoption behavior. The data of 472 samples drawn from middle and high school students in Taegu Metropolitan City were analyzed by factor analysis, ANOVA, Scheff□ test, t-test and regression analysis. Main results of the study are as follows. 1.Concept of the clothing involvement is composed of five dimensions: importance, fashion, self-expression, pleasure, and buying risk. 2.Socio-demographic factors do influence fashion adoption behavior. Average monthly pocket money, expenditures on clothes and household income are found to have statistically significant impacts on the adoption behavior. Female students are more fashion-oriented than male students. 3.The clothing involvement elements are found to have significant influences on fashion adoption behavior: fashion, importance and self-expression elements on fashion innovation; fashion, importance and pleasure elements on fashion information search. Key words: adolescents(청소년), fashion adoption behavior(유행채택 행동), clothing involvement(의복관여).

정신지체 및 청각장애학생의 花色선호에 관한 연구

정진자,오찬교,김은일 韓國植物ㆍ人間ㆍ環境學會 1999 인간식물환경학회지 Vol.2 No.3

This study is an investigation of mentally retarded and hearing impaired students about their preferential flower colors after showing flowers and interview. The aim of this study is getting fundamental data for introduction of gardening therapy. The results indicate that they had different preference for flower colors according to kinds of handicap. Color preference differed according to the age of subjects and kinds of objects.

실물과 사진제시에 의한 화색과 식물형태의 비교 : focusing on the students of mental ratardation 정신지체학생을 대상으로

안기완,백지성,김은일,조희두,서성철,오찬교 韓國植物ㆍ人間ㆍ環境學會 1999 인간식물환경학회지 Vol.2 No.4

This study was carried out to verify the differences in preference of flower colors by displaying flowered plants and their photos to mentally retarded students. As a result, normal students showed consistent preference against both the objects. But mentally retarded students had a different preference for flowered plants and their photos.

유방암과 섬유선종의 방사선학적 소견 : 유방 단순촬영술과 유방 초음파검사 소견의 비교 연구 Studies on mammographic and ultrasonographic findings evaluation

임한혁,최득린,고은석,이혜경,임철완,이상진,홍현숙,최교창,김영화,박재성 순천향의학연구소 1997 Journal of Soonchunhyang Medical Science Vol.3 No.2

Purpose : To evaluate the utility of mammography and ultrasonography in study of morphologic differential diagnosis between malignant and benign mass. Materials and Methods : Average age of patients with breast cancer was 48.4 year-old, and that of fibroadenoma was 29.4 year-old. The equipments used for examination were MF-159 high frequency mammography(Bennet Co.) and Acoustic image 5200S. We evaluated mammographic findings about breast parenchymal pattern, calcification, margin and size of the mass associated tumor nature, and ultrasonographic findings about shape, height and width, internal homogenicity and echo pattern, wall contour, boundary echo, and posterior shadow in breast mass. Thirty-seven of mammographic findings and 34 cases of ultrasonogreaphic findings in pathologically proven breast cancer and 34 case of mammographic findings and 71 cases of ultrasonographic findings in breast fibroadenoma were reviewed retrospectively. Results : In mammographic study, the parenchymal patterns of breast cancer according to Wolfe classification were NI(16.2%), PI(24.3%), P@(37.8%), and DY(21.6%) and those in fibroadenoma were NI(3.1%), Pl(11.7%), P2(35.2%),and DY(50%). Mammographic findings about presence of calcification were as follows; only calcification(16.2%), only mass(51.3%), and mass with calcification(32.5%) in breast cancer, and only mass(91.2%), mass with calcification(8.8%) in fibroadenoma. The features of mass margins were classified as ill-defined margin(45.9%), well-defined(5.4%), and well-defined with partial spiculation(48.6%) in breast cancer and ill-defined(20.5%), well-defined(73.5%), and well-defined with partial spiculation(5.8%) in fibroadenoma. The mass were grouped by size; 1-2cm(37.8%), 2-4cm(45.9%), and 4-6cm(16.3%) in breast cancer and 1-2cm(79.4%), 2-4cm(17.6%), and 4-6cm (3.0%) in fibroadenoma. On ultrasonographic study, the shape of masses in breast cancer were lobulated(82.3%),oval(14.7%), and round(3.0%),and those in fibroadenoma were lobulated(14.0%), oval(57.7%), and round(18.3%). The cases that the height was longer than width were 32.3% in breast cancer and 0% in fibroadenoma. The findings about homogenecity and echo patterns were as follows; hypoechoic(52.9%) and mixed(47.1%) in breast cancer and hypoechoic(2.8%), hypoechoic(63.4%), and mixed(33.8%) in fibroadenoma. The margin of masses were smooth in 85.9% of fibroadenoma, and irregular in 73.6% of breast cancer. The boundary echoes of masses and decreased posterior echo shadow were seen only in 61.8% and 55.9% of breast cancer, respectively. Conclusion: The margin and calcifications are more clearly delineated on mammography but breast cancer and fibroadenoma, both are more commonly developed in dense parenchymal pattern(P2+DY),and there findings are easily obscured in mammography. So ultrasoography is very useful in these masses evaluation, especially amoung young patients.

정상 관동맥을 가진 심장 점액종 환자에서 발생한 급성 심근 경색증 1예

이정민,이현승,전은정,윤호중,정욱성,오용석,김철민,김재형,최규보,홍순조,이교영,심상인 대한순환기학회 1998 Korean Circulation Journal Vol.28 No.9