• 제목/요약/키워드: Analysis Procedures

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Mass perturbation influence method for dynamic analysis of offshore structures

  • Cho, Kyu Nam
    • Structural Engineering and Mechanics
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    • 제13권4호
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    • pp.429-436
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    • 2002
  • The current work presents an analysis algorithm for the modal analysis for the dynamic behaviors of offshore structures with concepts of mass perturbation influence term. The mass perturbation concept by using the term, presented in this paper offers an efficient solution procedure for dynamical response problems of offshore structures. The basis of the proposed method is the mass perturbation influence concepts associated with natural frequencies and mode shapes and mass properties of the given structure. The mathematical formulation of the mass perturbation influence method is described. New solution procedures for dynamics analysis are developed, followed by illustrative example problems, which deal with the effectiveness of the new solution procedures for the dynamic analysis of offshore structures. The solution procedures presented herein is compact and computationally simple.

초등학생들의 학교안전생활 실천에 관한 실태조사 연구 (A Study of Primary School Students' Practicing Safety Procedure during Their School Life)

  • 박필남
    • 한국학교보건학회지
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    • 제16권2호
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    • pp.85-95
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    • 2003
  • This paper surveys and researches primary school students' situation of their school life. The purpose of this paper is to propose the basic information of the accident prevention teaching and the safety management in order to avoid accidents to occur beforehand. We selected m primary students out of the six primary schools in Taebaek City at which the nursing students of Kangwon Tourism College practiced school health. We used SPSS Win for analyzing data. We carne up with the general characteristics and percentage using frequency analysis, mean and standard deviation of each item, the mean difference using T-Test, and the different factors using one-way analysis. The results are as follows: 1. The 6th grade students don't practice safety procedures than the 5th grade students during outside the school. The older the student is, the less it practices safety procedures. 2. Boys practice safety procedures better than the girls during inside and outside the school. 3. Hot -tempered students don't practice safety procedures properly. 4. Most of the students who often use the health room of the school have high scores in safety procedures test and as a result, these students practice safety procedures thoroughly. 5. The grade of safety living activity is the highest during gymnastic class. Next is when the students use the stairs when they are going up and clown. Then, the use of science room In the playground is the lowest grade of safety for living activity.

내진설계에서 사용한 해석방법이 철골 특수모멘트골조의 붕괴위험도에 미치는 영향 평가 (Effect of Analysis Procedures on Seismic Collapse Risk of Steel Special Moment Frames)

  • 김태오;한상환
    • 한국지진공학회논문집
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    • 제24권6호
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    • pp.243-251
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    • 2020
  • In seismic design standards such as KDS 41 17 00 and ASCE 7, three procedures are provided to estimate seismic demands: equivalent lateral force (ELF), response spectrum analysis (RSA), and response history analysis (RHA). In this study, two steel special moment frames (SMFs) were designed with ELF and RSA, which have been commonly used in engineering practice. The collapse probabilities of the SMFs were evaluated according to FEMA P695 methodology. It was observed that collapse probabilities varied significantly in accordance with analysis procedures. SMFs designed with RSA (RSA-SMFs) had a higher probability of collapse than SMFs designed with ELF (ELF-SMFs). Furthermore, RSA-SMFs did not satisfy the target collapse probability specified in ASCE 7-16 whereas ELF-SMFs met the target probability.

오류유형 영향분석(FMEA)을 적용한 수술준비 위험예방활동의 효과 (A Study on Failure Mode and Effect Analysis (FMEA) for Preoperative Risk Prevention)

  • 김창희;이미향
    • 간호행정학회지
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    • 제22권5호
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    • pp.415-423
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    • 2016
  • Purpose: The purpose of this research was to provide patients with safe preoperative preparatory procedures by removing any risk factors from the preparatory procedures by using failure mode and effects analysis, which is a prospective risk-managing tool. Methods: This was a research design in which before and after conditions of a single group were studied, Failure mode and effects analysis were applied for the preparatory procedures done before operations. Results: The preparation omission rate before the operation decreased from 2.70% to 0.04%, and operation cancellation rate decreased from 0.48% to 0.08%. Conclusion: Failure mode and effects analysis which remove any risk factors for patients in advance of the operation is effective in preventing any negligent accidents.

한국표준의료행위 분류체계 개발 (The Development of Classification System of Medical Procedures in Korea)

  • 박형욱;손명세;김한중;박은철;유승흠
    • Journal of Preventive Medicine and Public Health
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    • 제29권4호
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    • pp.877-897
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    • 1996
  • In recent years, the Korean Medical Association has undertaken the feat of establishing the Korean Standard Terminology of Medical Procedures with the dedicated help of 32 medical academic societies. However, because the project is being conducted by several different circles, it has yet to see a clear system of classification. This thesis, therefore, proposes the three principles of scientific properties, usefulness and ideology as the basis for classification system and has developed the Classification System of Medical Procedures in Korea upon their foundation. The methodology and organization of this thesis as follows. First, by adopting scientific classification system of Feinstein(1988), an analysis of the classification systems of the medical procedures in the United States, Japan, Taiwan, WHO was carried out to reveal the framework and the basic principles in each system. Second, the direction of classification system has been constructed by applying the normative principle of medical field in order to show the future direction of the medical field and realize its ideology. Third, a finalized framework for the classification system will be presented as based on the direction of classification system. Of the three basis principles mentioned above, the analysis on the principles of usefulness was left out of this thesis due to the difficulty of establishing specific standards of analysis. The results of the study are as follows. The overall structure of the thesis is aimed at showing the 'Prevention-Therapy-Rehabilitation' quality of comprehensive health care and consists of six chapters; I. Prevention and Health Promotion II. Evaluation and Management III. Diagnostic Procedures IV. Endoscopy V. Therapeutic Procedures VI. Rehabilitation Chapter three Diagnostic Procedures is divided into four parts : Functional Diagnosis, Visual Diagnosis, Pathological Diagnosis, Biopsy and Sampling. Chapter five Therapeutic Procedures is divided into Psychiatry, Non-Invasive Therapy, Invasive Therapy, Anaesthesia and Radiation Oncology. Of these sub-divisions, Functional Diagnosis, Biopsy and Sampling, Endoscopy and Invasive Therapy employs the anatomical system of classification. On the other hand, Visual Diagnosis, Pathological Diagnosis, Anesthesia and Diagnostic Radiology, namely those divisions in which there is little or no overlapping in services with other divisions, used the classification system of its own division. The classification system introduced in this thesis can be further supplemented through the use of the cluster analysis by incorporating the advice and assistance of other specialists.

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한국과 캐나다의 초등학교 환경교육 관련 과학교육 내용의 비교 분석 (The Analysis of Environmental Education Related to Science in Primary School between in Korea and Canada)

  • 김경옥;정완호
    • 한국환경교육학회지:환경교육
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    • 제11권2호
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    • pp.212-223
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    • 1998
  • The main results of this study were as follows :(1) the more objectives for environmental education in science textbooks of Korea were focused on “awareness of the environment”. While the objectives of the Project WILD of Canada were balanced between each objectives. (2) the more environmental skills in science textbooks of Korea were focused on ‘observation’ and ‘description’, while the environmental skills of the Project WILD of Canada for environmental education focused on ‘analysis’ and ‘observation’. The environmental skills for the environmental education in the science textbooks of Korea were concentrated on ‘observation ’ and ‘description’, while the Project WILD of Canada were balanced between each skills for investigating the environment and the environmental problems. (3) the instructional procedures in science textbooks of Korea for the environmental education were very similar between each activities of the science textbooks, while the instructional procedures of the Project WILD of Canada were very different, and these procedures were very useful for educating the environmental behaviors.

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Classification for intraclass correlation pattern by principal component analysis

  • Chung, Hie-Choon;Han, Chien-Pai
    • Journal of the Korean Data and Information Science Society
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    • 제21권3호
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    • pp.589-595
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    • 2010
  • In discriminant analysis, we consider an intraclass correlation pattern by principal component analysis. We assume that the two populations are equally likely and the costs of misclassification are equal. In this situation, we consider two procedures, i.e., the test and proportion procedures, for selecting the principal components in classifica-tion. We compare the regular classification method and the proposed two procedures. We consider two methods for estimating error rate, i.e., the leave-one-out method and the bootstrap method.

초정밀 구조해석을 위한 수치절차의 영향 분석 (Investigation of the Effects of Some Numerical Procedure on the High Precision Structural Analysis)

  • 정강식;유홍희
    • 대한기계학회:학술대회논문집
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    • 대한기계학회 2004년도 춘계학술대회
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    • pp.756-761
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    • 2004
  • The effects of two important numerical procedures on the high precision structural analysis are investigated in this study. The two numerical procedures include continuous variable approximation and time integration. For the continuous variable approximation, polynomial mode functions generated by the Gram-Schmidt process are introduced and the numerical results obtained by employing the polynomial mode functions are compared to those obtained by classical beam mode functions. The effect of the time integration procedure on the analysis precision is also investigated. It is found that the two procedures affect the precision of structural analysis significantly.

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유체 윤활 저널 베어링의 소음 예측 (Noise Estimation of Oil Lubricated Journal Bearings)

  • 노병후;김경웅
    • 대한기계학회논문집A
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    • 제27권7호
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    • pp.1058-1064
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    • 2003
  • Noise estimating procedures of oil lubricated journal bearings are presented. Nonlinear analysis of rotor-bearing system including unbalance mass of the rotor is performed in order to obtain acoustical properties of the bearing. Acoustical properties of the bearing are investigated through frequency analysis of the pressure fluctuation of the fluid film calculated from the nonlinear analysis. Noise estimating procedures presented in this paper could aid in the evaluation and understanding of acoustical properties of oil lubricated journal bearings.

Evaluation of dam strength by finite element analysis

  • Papaleontiou, Chryssis G.;Tassoulas, John L.
    • Earthquakes and Structures
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    • 제3권3_4호
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    • pp.457-471
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    • 2012
  • Current code procedures for stress and stability analysis of new and existing concrete-gravity dams are primarily based on conventional methods of analysis. Such methods can be applied in a straightforward manner but there has been evidence that they may be inaccurate or, possibly, not conservative. This paper presents finite element modeling and analysis procedures and makes recommendations for local failure criteria at the dam-rock interface aimed at predicting more accurately the behavior of dams under hydraulic and anchoring loads.