• 제목/요약/키워드: Path Analysis Model

검색결과 1,470건 처리시간 0.028초

만성 소화기 질환자의 Pender 모형에 근거한 삶의 질 예측 모형 (A Structural Model Based on PenderPs Model for Quality of Life of Chronic Gastric Disease)

  • 박은숙;김소인;이평숙;김순용;이숙자;박영주;유호신;장성옥;한금선
    • 대한간호학회지
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    • 제31권1호
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    • pp.107-125
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    • 2001
  • This study was designed to construct a structural model for quality of life of chronic gastric disease. The hypothetical model was developed based on the literature review and Pender's health promotion model. Data were collected by questionnaires from 459 patients with chronic gastric disease in a General Hospital from July 1999 to August 2000 in Seoul. Data analysis was done with SAS 6.12 for descriptive statistics and PC-LISREL 8.13 Program for Covariance structural analysis. The results are as follows : 1. The fit of the hypothetical model to the data was moderate, thus it was modified by excluding 1 path and including free parameters and 2 path to it. The modified model with path showed a good fitness to the empirical data ($\chi$2=934.87, p<.0001, GFI=0.88, AGFI=0.83, NNFI=0.86, RMSR =0.02, RMSEA=0.07). 2. The perceived barrier, health promoting behavior, self-efficacy, and self-esteem were found to have significant direct effects on the quality of life. 3. The health concept, health perception, emotional state, and social support were found to have indirect effects on quality of life of chronic gastric disease. In conclusion, the derived model in this study is considered appropriate in explaining and predicting quality of life of chronic gastric disease. Therefore it can effectively be used as a reference model for further studies and suggested direction in nursing practice.

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모래의 응력경로에 따른 Lade의 단일항복면 구성모델의 응력-변형거동 특성 (Characteristics of Stress-Strain Behavior for Lade's Single Work-Hardening Constitutive Model with Stress Path of Sands)

  • 김찬기;이종천;조원범;박욱근;김환욱
    • 한국지반신소재학회논문집
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    • 제11권2호
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    • pp.1-9
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    • 2012
  • 본 연구는 이 구성모델의 실용화를 위한 검토로 응력경로에 따라 어떤 특성이 있는가를 밝히기 위하여 백마강 모래를 이용하여 등방압축팽창시험과 응력경로를 달리한 일련의 배수삼축시험(CTC, Conventional triaxial compression test), TC(Triaxial compression test), RTC(Reduced triaxial compression test), OSP(Optional stress path))을 각각 수행하여 각각의 토질매개변수를 결정한다. 그리고 각각의 응력경로에 대한 시험으로부터 결정된 토질매개변수 11개를 이용하여 토질매개변수를 결정시 이용된 시험 결과를 역해석한다. 그리고 항복함수에 관련된 토질매개변수 h와 ${\alpha}$를 파괴기준에 관련된 토질매개변수 ${\eta}_1$의 상관식과 상수로 결정한 9개의 토질매개변수를 이용하여 응력경로가 다른 경우의 응력-변형률 거동에 대한 예측의 정도를 밝히기 위하여 CTC시험, TC시험, RTC시험, OSP시험 및 Fine Silica Sand시험의 결과를 각각 해석하여 단일항복면 구성모델의 실용성을 검토한다.

지식정보 품질향상을 위한 경로 분석 및 SERVQUAL (Path Analysis and SERVQUAL for Knowledge Quality Improvement)

  • 박정훈;손소영
    • 품질경영학회지
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    • 제28권3호
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    • pp.145-154
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    • 2000
  • Effective management of knowledge is essential to keep up with demands of this challenging information age. The first step for this kind of management would be to define indicators to evaluate the quality of knowledge. In this paper, we use five latent variables (intrinsic quality, representational quality, ease of use of quality, maintainable quality, usage of quality) as basis for a preliminary path analysis for knowledge management. Preliminary study results showed that high intrinsic quality does not necessarily guarantee high frequency of use. A modified questionnaire is made and is used for SERVQUAL. The result of SERVQUAL shows that customers are not relatively happy about both intrinsic quality and its ease of use. Additional path analyses are done for both expected and observed quality indicators. The path model based on the expectation indicated that the presentation method of knowledge would induce its easy maintenance while that based on observation did not back up the same phenomenon.

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수치해석기법을 이용한 고온태양열 흡수기의 열성능 분석 (Computational Heat Transfer Analysis of High Temperature Solar Receiver)

  • 김태준;오상준;이진규;서태범
    • 한국태양에너지학회:학술대회논문집
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    • 한국태양에너지학회 2009년도 춘계학술발표대회 논문집
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    • pp.49-54
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    • 2009
  • This study focus on verification of the thermal efficiency of volumetric receiver with $5kW_{th}$ Dish-type solar thermal system. Spiral flow path shaped on receiver and working fluid(steam) flow along the this flow path. Porous material for radiation-thermal conversion used in former researches are substituted with the stainless steel wall installed along the spiral shaped flow path. Numerical analysis for the flow path and temperature distributions are carried out. Numerical results are compared with experimental data. Using the numerical model, the heat transfer characteristics of spiral type receiver for dish-type solar thermal systems are known and the thermal performance of the receiver can be estimated.

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비행경로각 조정에 의한 중거리 탄도미사일의 비행궤적 특성 해석 (Analysis of Flight Trajectory Characteristics of the MRBM by Adjusting the Angle of a Flight Path)

  • 김지원;권용수
    • 한국군사과학기술학회지
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    • 제18권2호
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    • pp.173-180
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    • 2015
  • North Korea has developed ballistic missiles over the past 30 years. It is believed that they have a variety of ballistic missiles more than 1,000. Because these ballistic missiles threaten South Korea directly, accurate analysis of them is essential. Flight trajectories of the ballistic missiles are generally changed by means of adjusting payload weight, Isp, flight path angle, and cut-off time. The flight path angle is widely used to control the missile range. However it is difficult to predict the missile trajectory exactly in real operational environment because the missile could be launched according to its intention and purpose. This work analyzed the 1,000 km range MRBM's trajectory characteristics from adjusting flight path angle which is depressed as well as lofted method. The analysis of missile trajectory characteristics is based on the simulation of the missile trajectory model developed by KNDU research team.

경계면 요소를 고려한 지하 철근콘크리트 구조물의 지진해석 (Seismic Analysis of Underground RC Structures considering Interface between Structure and Soil)

  • 남상혁;변근주;송하원;박성민
    • 한국콘크리트학회:학술대회논문집
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    • 한국콘크리트학회 2000년도 가을 학술발표회논문집(I)
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    • pp.87-92
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    • 2000
  • The real situation of an underground reinforced concrete(RC) structure with the surrounding soil medium subjected to seismic load is quite difficult to be simulated through an expensive work and, even if it is possible to arrange such an experiment, it will be too expensive. So development of analytical method can be applied usefully to seismic design and seismic retrofit through an analysis of seismic behavior and seismic performance evaluation. A path-dependent constitutive model for soil that can estimate the response of soil layer is indispensible for dealing with kinematic interaction of RC/soil entire system under seismic loads. And interface model which deals with the dynamic interaction of RC/soil entire system is also necessary. In this study, finite element analysis program that can consider path-dependent behavior of RC and soil, and interfacial behavior between RC and soil is developed for rational seismic analysis of RC/soil entire system. Using this program, nonlinear behavior of interface between RC and soil is analyzed, and the effect of interfacial behavior to entire system is investigated.

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변수모델을 이용한 전달경로분석법(OPAX)과 전달률 함수를 사용한 전달경로분석법(OTPA)을 사용한 승차감 저해요인분석 (Analysis of the Cause of Hindrance for Ride Quality with OPAX and OTPA)

  • 김종식;신광수;최상일;임세빈;김진동;이상권
    • 한국소음진동공학회논문집
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    • 제24권12호
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    • pp.935-942
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    • 2014
  • The ride quality investigation is on-going topic in the car industry since its global standard has not evaluated and it is difficult to point out one part that hinders the ride quality. Since the traditional transfer path analysis that is widely used in car industry to investigate the ride quality requires a lot of test time to process the full data so that there are problems to conduct in industry. Based on these disadvantages, new approaches have developed such as OPAX(operational path analysis with eXogeneous inputs) and OTPA(operational transfer path analysis) for last decades. The OTPA only requires the operational data for evaluate the contribution of vibration sources and the OPAX has advantage of using parametric model to estimate the operating load and needs a minimum set of extra tests with excitation. In this paper, for evaluating the hindrance of ride quality two methods are used and the result is compared with another result of a car having higher ride quality.

노권상(勞倦傷)의 인과 구조 분석 (Analysis of Cause and Effect Structure for Nogwonsang)

  • 윤규진;이상철;김민용;박영배;박영재
    • 대한한의진단학회지
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    • 제14권1호
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    • pp.1-14
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    • 2010
  • Backgrounds : Bojungikgitang is one of the most common herbal prescriptions in Oriental Medicine, and it is highly recommended prescription for Nogwonsang syndrome. The Author developed Nogwonsang questionnaire for quantitative evaluation. Nogwonsang questionnaire is consisted of causes that induce fatigue, symptoms that directly associated with fatigue, and secondary symptoms that is induced from fatigue. Purposes : This study aims to verify whether the Bojungikgitang Questionnaire has causality and meaningful path structure by path analysis. Methods : 242 patients from 12 OMD clinics participated in this study. The patients executed a question investigation in the object. Factor analysis was conducted for extraction of factor and abridgment of items. Path analysis was conducted to verify path structure. SPSS 15.0 for Windows and AMOS 7.0 were used for statistical analysis. Results : Overwork factor explains fatigue factor. Coefficient is 0.771. Fatigue factor explains digesting and cold factor. Individually coefficient is 0.632 and 0.465. Model fit is $X^2=61.395$(df=51), GFI=0.960, AGFI=0.939, NFI= 0.924, CFI=0.986, RMSEA=0.029. Path structure is proved to be significant. Conclusions : Further research is needed Gold standard of Nogwonsang. Establishment of Gold standard leads and the collection of data and the research which are objective are possible. Connection of the clinical indexes which are objective on the paperweight outside and leads and the development of the diagnosis tool which is fixed quantity is demanded.

Young Men's Choice of Fashion as a Career Path: "Seekers" and "Settlers"

  • Karpova, Elena;Lee, Juyoung;Garrin, Ashley
    • Fashion, Industry and Education
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    • 제16권2호
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    • pp.1-16
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    • 2018
  • This study explored men's choice of fashion as a college major and, subsequently, a non-traditional career path. Such investigation is important to gain a better understanding of the motives and processes of selecting a non-traditional college major and subsequent career path. This research consulted several theoretical frameworks to guide the development of research questions and help interpret the findings of the study. Specifically, our study builds upon Holland's trait theory (1982), Gottfredson's (1981) circumscription theory, Farmer's (1985) model of career motivation, and Simpson's (2005) typology of men's non-traditional career entry. A qualitative method was used to explore men's experiences of selecting fashion as an academic major in college and deciding to pursue a career in the traditionally female-dominated field. Following the analysis of 22 individual interviews with male upperclassmen majoring in fashion, three topical areas emerged and we proposed a model of male students' path to a non-traditional college major. The model explains male students' dynamics of entering a non-traditional college major, the role of personal and social factors in the decision process as well as the role of future career orientation when choosing to study fashion as an academic major.

FLUENT를 활용한 콘크리트 건식 저장용기 공기유로 내부 유동장 해석 (ANALYSIS ON FLOW FIELDS IN AIRFLOW PATH OF CONCRETE DRY STORAGE CASK USING FLUENT CODE)

  • 강경욱;김형진;조천형
    • 한국전산유체공학회지
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    • 제21권2호
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    • pp.47-53
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    • 2016
  • This study investigated natural convection flow behavior in airflow path designed in concrete dry storage cask to remove the decay heat from spent nuclear fuels. Using FLUENT 16.1 code, thermal analysis for natural convection was carried out for three dimensional, 1/4 symmetry model under the normal condition that inlet ducts are 100% open. The maximum temperatures on other components except the fuel regions were satisfied with allowable values suggested in nuclear regulation-1536. From velocity and temperature distributions along the flow direction, the flow behavior in horizontal duct of air inlet and outlet duct, annular flow-path and bent pipe was delineated in detail. Theses results will be used as the theoretical background for the composing of airflow path for the designing of passive heat removal system by understanding the flow phenomena in airflow path.