• 제목/요약/키워드: Relative importance

검색결과 1,658건 처리시간 0.029초

양생직후 초기재령의 콘크리트 내부 온도와 상대습도의 측정 및 분석 (Investigation of Internal Temperature and Relative Humidity of Concrete Immediately After Mix and Placement)

  • 박철우;박영훈;박용걸
    • 한국철도학회:학술대회논문집
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    • 한국철도학회 2008년도 추계학술대회 논문집
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    • pp.1065-1068
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    • 2008
  • Concrete is still one most common construction materials even in railway structures. As structures become massive and mega-sized, the importance of early age concrete quality control becomes more significant. Among various factors, relative humidity and temperature are the primary factors governing the early age quality. Temperature raise due to cement hydration causes stress, which can develop to cracking with internal and/or external restraints. Exposure conditions including ambient temperature, humidity and wind also significantly affect the cracking behavior of early age concrete. Among many of studies on the early age concrete behavior, investigation on the variation of temperature and relative humidity internal of concrete is not common. That is in part because the difficulties in measuring the relative humidity and temperature inside the concrete. This study used a digital sensor with an appropriate logger to measure internal temperature and relative humidity. This direct measuring method is expected to provide more reliable and comprehensive data acquisition on the early age behavior of concrete.

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세탁조건이 세정 효과에 미치는 영향에 관한 연구 -P/C혼방직물을 중심으로- (A Study of Washing Conditions on Soil-release -Laundering P/C Fabric-)

  • 남상우
    • 한국의류학회지
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    • 제12권1호
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    • pp.69-80
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    • 1988
  • In this study, we have compared the relative importance of various washing condition affecting on soil release for P/C blended fabrics. P/C blended fabrics were soiled by the pad-dry method with aqueous and oily soil. The washing procedures of soiled samples were performed by Atlas Launder-Ometer with 27 wash conditions which are combinations of wash temp. wash time and detergent cone. The degree of soil-release was evaluated with CIE 1976 Lab color difference before and after washing. Multiple regression analysis was used to evaluate the optimum wash conditions and the relative importance of the factors providing maximum soilremoval.

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A Framework for Investigating Mobile Web Success in the Context of E-commerce: an Analytic Network Process (ANP) Approach

  • Salehi, Mona;Keramati, Abbas;Didehkhani, H.
    • Journal of Computing Science and Engineering
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    • 제4권1호
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    • pp.53-79
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    • 2010
  • This study proposes a framework to investigate the factors of mobile web success in the context of e-commerce, and the relative importance of these success factors in selecting the most preferred mobile web. First, the Updated Delone and Mclean IS success model (2003) is chosen to extract significant mobile web success factors in the context of e-commerce. Second, it is extended through applying an Analytic Network Process (ANP) approach for investigating the relative importance of each factor and ranking alternative mobile webs in the context of e-commerce. The choice of success measure is a function of the context, which is the objective of this study. Thus, the present study is aimed at evaluating the success of an e-commerce mobile web by customizing measures of the Updated Delone and McLean IS Success model according to the context.

E-logistics에 있어서 화주의 평가체계에 관한 실증적 연구 : 국제 해운분야를 중심으로 (Empirical Analysis of Shipper Requirement for E-logistics : The Case of International Shipping)

  • Cho, Chan-Hyouk;Strohmaier, James G.
    • 한국항만경제학회지
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    • 제20권2호
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    • pp.217-234
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    • 2004
  • Information technology has been transforming the relationship between shippers and carriers, but an unresolved question remains: what is the relative importance to shippers of service versus cost benefits of e-logistics solutions? This research develops and empirically tests a model to determine how Internet-based logistical operations in international shipping impact on the relative importance of cost versus service benefits to shippers. Contrary to expectations, results show that shippers perceived cost benefits from well-designed web sites, undoubtedly a consequence of perceptions that multi-function portals with ease of access contributed to savings in time and money. Another result was the confirmation of the positive effects of cargo tracing and bill of lading issuance on service-related factors. Finally, this study draws attention to the need for improvements in on-line booking capabilities and development of a comprehensive common portal; issues that must be addressed for shipping lines to succeed in an increasingly competitive e-logistics market.

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국내기업에서의 JIT 운용기법 중요성 평가에 관한 연구 -Compatibility를 이용한 AHP를 중심으로- (A Study on the Evaluation of JIT Operational Techniques in the Domestic Industries -Using Compatibility in the AHP-)

  • 구일섭;임익성;김태성
    • 산업경영시스템학회지
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    • 제21권48호
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    • pp.241-251
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    • 1998
  • The purpose of this study is to evaluate the relative importance of seven JIT operational techniques in Domestic industries. These techniques are used to improve manufacturing effectiveness and efficiency such as : Setup time reduction, Kanban, Multi-functional worker, U type layout, Andon(line stop), Atonomation, and Smoothing production. The new analytic hierarchy process(AHP) model is used in order to evaluate the relative importance of the seven JIT operational techniques which are used to increase the manufacturing effectiveness and efficiency. To aggregate the multi-divisions priorities, in this paper, we suggest a way which decision maker can exclude outlier matrix from group by using the concept of the compatibility in AHP.

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경동맥 혈류유동에서의 혈액의 비뉴우토니안 특성의 상대적 중요성 해석 (THE RELATIVE IMPORTANCE OF NON-NEWTONIAN CHARACTERISTICS OF BLOOD IN THE HEMODYNAMICS OF THE CAROTID BIFURCATION)

  • 이상욱
    • 한국전산유체공학회:학술대회논문집
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    • 한국전산유체공학회 2008년도 학술대회
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    • pp.181-185
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    • 2008
  • In this study, we attempted to quantify the relative importance of assumptions regarding blood rheology. Three patient-specific carotid bifurcation geometries and time-varying flow rates were obtained using magnetic resonance imaging. For each subject, CFD simulations were carried out assuming two different non-Newtonian rheology models Carreau and Ballyk models) and rescaled Newtonian viscosities based on characteristic shear rates to account for the shear-thinning property of blood. The sensitivity of WSS and oscillatory shear index (OSI) were contextualized with respect to the reproducibility of the reconstructed geometry and to assumptions regarding the inlet boundary conditions. We conclude that the assumption of Newtonian fluid is reasonable for studies aimed at quantifying the distribution of WSS-based extrema in an image-based CFD model of carotid bifurcation.

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경동맥 혈류유동에서의 혈액의 비뉴우토니안 특성의 상대적 중요성 해석 (THE RELATIVE IMPORTANCE OF NON-NEWTONIAN CHARACTERISTICS OF BLOOD IN THE HEMODYNAMICS OF THE CAROTID BIFURCATION)

  • 이상욱
    • 한국전산유체공학회:학술대회논문집
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    • 한국전산유체공학회 2008년 추계학술대회논문집
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    • pp.181-185
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    • 2008
  • In this study, we attempted to quantify the relative importance of assumptions regarding blood rheology. Three patient-specific carotid bifurcation geometries and time-varying flow rates were obtained using magnetic resonance imaging. For each subject, CFD simulations were carried out assuming two different non-Newtonian rheology models (Carreau and Ballyk models) and rescaled Newtonian viscosities based on characteristic shear rates to account for the shear-thinning property of blood. The sensitivity of WSS and oscillatory shear index (OSI) were contextualized with respect to the reproducibility of the reconstructed geometry and to assumptions regarding the inlet boundary conditions. We conclude that the assumption of Newtonian fluid is reasonable for studies aimed at quantifying the distribution of WSS-based extrema in an image-based CFD model of carotid bifurcation.

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Determination and application of the weights for landslide susceptibility mapping using an artificial neural network

  • Lee, Moung-Jin;Won, Joong-Sun;Yu, Young-Tae
    • 한국GIS학회:학술대회논문집
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    • 한국GIS학회 2003년도 공동 춘계학술대회 논문집
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    • pp.71-76
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    • 2003
  • The purpose of this study is the development, application and assessment of probability and artificial neural network methods for assessing landslide susceptibility in a chosen study area. As the basic analysis tool, a Geographic Information System (GIS) was used for spatial data management. A probability method was used for calculating the rating of the relative importance of each factor class to landslide occurrence, For calculating the weight of the relative importance of each factor to landslide occurrence, an artificial neural network method was developed. Using these methods, the landslide susceptibility index was calculated using the rating and weight, and a landslide susceptibility map was produced using the index. The results of the landslide susceptibility analysis, with and without weights, were confirmed from comparison with the landslide location data. The comparison result with weighting was better than the results without weighting. The calculated weight and rating can be used to landslide susceptibility mapping.

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정보시스템 내부통제요소 중요도 평가에 관한 연구 : 감사 개인적 요인을 충심으로 (A Study on the Evaluation of Internal Controls Factors in Information System : Focused on Auditors Personal Factors)

  • 이명호;이우형;김재학
    • 경영과학
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    • 제19권1호
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    • pp.39-54
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    • 2002
  • With increasing use of the computers and rapid progress of system technology, the Judgment Process of information system auditors is exacerbated and the auditing environment is becoming very complex. Therefore, with limited resources, to achieve the ultimate goals of control & auditing, it is absolutely necessary for the auditors to Identify the relative importance and priority order of controls Accordingly. the auditors'review and evaluation of the internal control are becoming the Important issues in our modern auditing Process. The objectives of this paper are to identify the crucial and important control factors that are necessary for the control system, end to analyze the relative importance of the internal controls.

선진국 제조기업의 신제품 성공요인에 관한 비교 연구: 다수준 접근 방식 (A comparison of new product success factors across advanced countries: A multi-level approach)

  • 이영우;조영삼
    • 지식경영연구
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    • 제21권2호
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    • pp.59-75
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    • 2020
  • In this paper, we investigate the influence of factors on the firm, industry, and country levels on the new product development performance (NPD) of manufacturing firms in advanced economies. The resource-based view, industrial organization theory and institutional theory have established that firm-, industry- and country-level factors are all relevant for the NPD of firms. However, little is known about the relative importance of factors at the three different levels across countries, as prior studies on firms' NPD have focused on specific countries and levels of analysis. Our analysis of survey data from 1,437 manufacturing firms in nine advanced OECD countries shows that while firm-level factors are generally better predictors of firms' innovativeness than either industry- or country-level factors, the results strongly differ across countries, indicating that the relative importance of antecedents of innovativeness is country-specific rather than universal.