• Title/Summary/Keyword: 예비위험분석

Search Result 101, Processing Time 0.028 seconds

Risk based Value Index Evaluation Model for Modular Design Alternatives in Plant Construction Projects (플랜트 건설사업의 모듈러 설계대안별 RVI 평가 모델)

  • Kang, Hyun Wook
    • Korean Journal of Construction Engineering and Management
    • /
    • v.23 no.5
    • /
    • pp.98-107
    • /
    • 2022
  • The purpose of this study is to suggest a model for evaluation of a risk based value index for modular design alternatives in plant construction projects. Accordingly, 1) Setting the basic project cost and the scope to apply the module, 2) Evaluating the importance, easiness, and effectiveness index for Engineering, Procurement, Fabrication, transportation, and construction work, 3) Estimating the total project cost by analyzing the risk reserve Step, 4) Comparing the effectiveness index and total project cost for each modular design alternative, it was composed of the steps of deriving RVI. To verify such a model, Plan-A, which applied a module to one process, and Plan-B, which applied a module to three processes, were composed to evaluate RVI.

A Study on the Estimation of the Contingency by the Regression Analysis on the Apartment (회귀분석을 통한 공동주택 공사예비비 산정에 관한 연구)

  • Lee Man-Hee;Lee Hak-ki
    • Proceedings of the Korean Institute Of Construction Engineering and Management
    • /
    • autumn
    • /
    • pp.226-229
    • /
    • 2003
  • Construction manager must consider the possibility on the failure of the project in advance and the contingency to provide against the situation, those of which is a dangerous condition not to predict. If they have a quick decision without understanding the contingency, the over-cost in the total cost would be continuously accumulated, and be a barrier at a project going in progress. A various risk could not be coped with at a time to decide either going or sloping the project until the contingency is applied from the first step to progress the project. But a case to apply the contingency to the construction for the investment or the analysis of the project is a little. The process to evaluate it is also absent. The propose of this paper is the followed ; To establish the total cost including the risk first of all, devide into plus or minus factor of the cost, and then the process to calculate the contingency must be suggested by the regression analysis.

  • PDF

뇌혈관의 혈류예비력 시뮬레이션 연구

  • Ryu, A-Jin;Lee, Gyeong-Eun;Bang, Hyeon-Gi;Lee, Jong-Ho;Park, Seon-Yeol;Sim, Eun-Bo
    • Proceeding of EDISON Challenge
    • /
    • 2017.03a
    • /
    • pp.631-634
    • /
    • 2017
  • 뇌혈관은 평상시 뇌조직의 필요량보다 더 많은 혈류를 수송할 능력을 가지고 있는데 이를 뇌혈관 혈류예비력이라 한다. 뇌혈관이 특정한 요인에 의해 협착이 생기면 뇌관류압이 감소하는데 이를 보상하기 위해 뇌세동맥의 내경을 확장시켜 뇌혈류를 유지하도록 하는 것이다. 따라서 예비력이 낮은 사람일 경우 협착으로 인해 혈관 내경이 좁아져 있다면 운동이나 스트레스 상황에서 뇌졸증 내지 뇌허혈의 위험이 증가된다. 따라서 본 연구팀은 컴퓨터 시뮬레이션을 통해 뇌혈관 협착으로 인한 예비능 감소를 예측하였다. 이를 위해 환자의 MRA 영상 이미지를 영역화하여 3차원 격자를 생성하였으며 생성된 환자 맞춤 모델을 대상으로 전산유체해석을 진행하였다. 그리고 가상 협착을 모델에 적용하여 뇌혈관 협착률과 예비능의 관계를 분석했다.

  • PDF

The in-situ Assessment of GIS-Based Geotechnical Hazard Map (GIS기반 지반재해위험지도의 현장 적용성 평가)

  • Ryu, Ji Hyeob;Seo, Sang Hoon;Hwang, Ui Jin
    • Journal of Korean Society of Disaster and Security
    • /
    • v.6 no.1
    • /
    • pp.35-45
    • /
    • 2013
  • In recent years, increasing damage due to landslides. So the government is to create a geotechnical hazard map. This study was to evaluate the applicability of the geotechnical hazard map by using 4 years of landslide cases in Seoul and Busan. And the in-situ aseessment has been carried out in test-bad area with specialists. Study has shown dangerous grade in geotechnical hazard map is more dangerous than the actual. Thus we can utilize geotechnical hazrd map in the purpose of the geotechnical hazard preliminary assessment. However, the in-site inspection and evaluation is required for in order to select the hazard area.

Exploratory study on a psychological traits changes by entrepreneurship short-term education (단기 창업교육이 예비창업자의 심리적 특성 변화 영향에 대한 탐색적 연구)

  • Lee, Seung-Jae;HwangBo, Yun
    • Asia-Pacific Journal of Business Venturing and Entrepreneurship
    • /
    • v.5 no.1
    • /
    • pp.19-44
    • /
    • 2010
  • This study intend to analyze effect on a change mental feature of founder received entrepreneurship short-term education called the successful foundation package. In other words, what kind of change the mental feature of founder before and after entrepreneurship education. The founder of the psychological characteristics include the locus of control, risk-taking propensity, need for achievement, ambiguity tolerance and specially new psychological trait, that is, creativity. The result of paired T-test and ANCOVA on pre-founders who received Entrepreneurship short-term education which called successful business start-up package is that need for achievement, ambiguity tolerance and creativity among pre-founders' psychological characteristics are enhanced by Entrepreneurship short-term education. However ANCOVA shows that there are no psychological characteristics changes according to age, education, the number of Entrepreneurship education.

  • PDF

A Study on the Application of Cost Risk Exposure methods by the Probabilistic Evaluation on the Construction Projects (확률적 평가에 의한 건설공사 비용 위험도 측정의 적용성에 관한 연구)

  • Cho Jea-Ho;Chun Jae-Youl
    • Korean Journal of Construction Engineering and Management
    • /
    • v.1 no.1 s.1
    • /
    • pp.63-71
    • /
    • 2000
  • The paper considers two non-deterministic methods of analysing the risk exposure in a cost estimate The fist method(referred to as the 'conventional statistical' method) analyses cost data directly, to describe a probability distribution for total cost. The second method(referred to as the 'Monte Carlo simulation' method) interprets cost data directly, to generate a probability distribution for total costs from the descriptions of elemental cost distribution. The common practice of allowing for risk through an all-embracing contingency sum or percentage addition is challenged. Rather than excluding conventional, non-deterministic methods, they are here presented as possibly the only of effective foundation on which to risk management in cost estimating.

  • PDF

Analysis of Risk Factors in Ex-Ante Evaluation of Large-Scale Government R&D Programs (대형 R&D사업 사전평가에서의 위험요인에 대한 인식 분석)

  • Lee, Yoon Been;Yoon, Ji Woong
    • Journal of Korea Technology Innovation Society
    • /
    • v.17 no.2
    • /
    • pp.289-308
    • /
    • 2014
  • We analyze the risk factors identified for ex-ante evaluation regarding government R&D programs. In particular, we empirically examined to what extent each risk factor is perceived to be important by the stage of R&D, technology field, researcher's career and experience. The empirical results show that technology risk is perceive to be less important for basic research, while market risk more perceived to be important in the IT field. Political risk is perceived to be less important for the university faculty, while researchers with government R&D project experience gave more value to legal risk factor.

Comparison of Epistemic Characteristics of Using Primary and Secondary Data in Inquiries about Noise Conducted by Elementary School Preservice Teachers: Focusing on the Cases of Science Inquiry Reports (소음에 대한 초등 예비교사들의 탐구에서 나타나는 1차 데이터와 2차 데이터 활용의 인식적 특징 비교 - 과학탐구 보고서 사례를 중심으로 -)

  • Chang, Jina;Na, Jiyeon
    • Journal of Korean Elementary Science Education
    • /
    • v.43 no.1
    • /
    • pp.81-94
    • /
    • 2024
  • This study explores and conducts an in-depth comparison of the epistemic characteristics in different data types utilized in the science inquiries of preservice teachers regarding noise as a risk in everyday life. Focusing on primary and secondary data in the context of science inquiries about noise, we examined how these data types differ in science inquires in terms of inquiry design, data collection, and analyses. The findings reveal that sensor-based primary data enable direct measurement and observation of key phenomena. Conversely, secondary data rely on predetermined measurement methods within a public data system. These differences require different epistemic considerations during the inquiry process. Based on these findings, we discuss the educational implications concerning teaching approaches for science inquiries, teacher education for inquiry teaching, and the development of risk response competencies in preparation for the VUCA (Volatility, Uncertainty, Complexity, and Ambiguity) era.

The Characteristics of 'Scientific Participation and Action' Lessons designed by Preservice Teachers: Focusing on the Analysis of Lesson Plans about N oise Issue (초등 예비교사들이 설계한 '과학적 참여와 실천' 수업의 특징 - 소음 문제에 대한 교수학습 과정안 분석을 중심으로 -)

  • Chang, Jina;Na, Jiyeon
    • Journal of Korean Elementary Science Education
    • /
    • v.43 no.1
    • /
    • pp.136-147
    • /
    • 2024
  • It has recently be emphasized in science education that lessons that can develop "scientific participation and action" should be implemented to scientifically recognize various problems and respond to them as well as risks that occur in real life. This study aims to analyze the characteristics of scientific participation and action lessons as perceived by the preservice primary school teachers. To do that, the researchers collected and analyzed the lesson plans designed by the preservice teachers based on the achievement standard related to noise for grades 3-4 in 2022 revised science curriculum. Focusing on the stages of "problem recognition," "data collection and analysis," and "implementation and sharing," the results identity the four main characteristics as problem-solving activity, inquiry activity, investigative activity, and activity that encourages practical actions. The two or three features were found to be combinated in a lesson depending on its context. In some cases, only one feature was seen in a lesson. Based on the results, educational implications were discussed in terms of the teaching and learning methods and teacher education for implementing scientific participation and action.

Analysis of Spare Capacity Ratio in Optical Internet using Cut-Set (광인터넷망에서 Cut-Set을 이용한 예비대역폭 비율 분석)

  • Kim, Taehyoun;Hwang, Hoyoung
    • The Journal of the Institute of Internet, Broadcasting and Communication
    • /
    • v.12 no.5
    • /
    • pp.197-203
    • /
    • 2012
  • This paper studies network recovery method using logical multiple ring architecture embedded in WDM optical Internet environment. The multiple ring-based recovery method provides fast and simple network restoration operation, and performs local recovery that is detouring the failed link. The multiple ring architecture can provide higher resource efficiency by sharing the backup routes and reducing the number of spare wavelengths. This paper calculates the required spare capacity ratio using Cut-Sets in the given network topology and performs simulation for comparative analysis.