• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2000년도 봄 학술발표회 논문집
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• pp.805-810
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• 2000

The purpose of this study is to predict long-term structural safety on the Yonggwang Unit 3 prestressed concrete containment building. The aging-related degradations of its main structural materials are investigated and the effects of the property variation of time-dependent materials on the structural behavior of containment building are also assessed through the analysis on the ultimate pressure capacity. The nonlinear finite element analyses for both the design criteria condition a the present aging condition are conducted to assess the present structural capacity of the containment building As a result, it is verified that the structural capacity of the Yonggwang Unit 3 containment building under the present aging condition is judged to be still rugged. n addition, the sensitivity of the ultimate pressrue capacity of containment building according to th degradation levels of the structural materials are assessed. Finally, it is showed that the sensitivity levels are in the order of the tendon, rebar and concrete in case of individual material degradations, and the tendon-rebar, tendon-concrete and rebar-concrete in case of coupled material degradations.

• 산업경영시스템학회지
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• 제22권51호
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• pp.1-10
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• 1999

In recent industry society, it is revealed that, as an increase in the use of automated manufacturing and process inspection technology, the data from mass production system exhibits some degrees of autocorrelation. The operation characteristics of traditional control charts developed under the independence assumption are adversely affected by the presence of serial correlation. Therefore, when autocorrelated construction contacted with time-series models explain, the time-series models are the Box-Jenkins forecast models which have been proposed as the best forecasting tool which allows for partitioning of variation into result from the autocorrelation structure and variation due to unusual but assignable causes. In this paper, for the AR(1) process of Box-Jenkins forecast models, when the constant term ξ are zero and different from zero, I want to analyze the sensitivity of (equation omitted), CUSUM and EWMA control chart for forecast residuals.

• 대한전기학회논문지:전력기술부문A
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• 제55권11호
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• pp.453-462
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• 2006

This paper evaluates the reliability of KEPCO system using TRELSS, which is a probabilistic reliability evaluation program for large-scaled power system. In order to reflect the characteristic of KEPCO system, the sensitivity of reliability indices such as LOLP, EDLC, EENS and Energy Curtailment for variations of TRELSS parameter and input data was analyzed. Additionally, probabilistic reliability of KEPCO system reflecting sensitivity analysis results was systematically evaluated and simulated. Finally, maximum acceptable FOR of KEPCO system to satisfy reliability criterion, which meet in process of establishing the basic plan for long-term electricity supply and demand is suggested.

• 한국군사과학기술학회지
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• 제11권4호
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• pp.29-35
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• 2008

In this paper, a new guidance law to reduce sensitivity to the initial heading errors is proposed. In order for shaping the input weights over the flight, we introduce the distribution functions expressed in terms of time-to-go and its inverse term. By applying the optimal control theory with the synthesized weights, the homing guidance law is derived. Also the characteristics of the proposed law are examined. Various computer simulations show the good performance of the proposed guidance.

• 품질경영학회지
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• 제35권1호
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• pp.24-34
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• 2007

This paper investigates the average run length (ARL) of a selectively moving average (S-MA) control chart. The S-U chart is designed to detect shifts in the process mean. The basic idea of the S-MA chart is to accumulate previous samples selectively in order to increase the sensitivity. The ARL of the S-MA chart was shown to be monotone decreasing with respect to the decision length in a previous research [3]. This paper derives the steady-state ARL in a closed-form and shows that the monotone property is resulted from head-start assumption. The steady-state ARL is shown to be a sum of head-start ARL and an additional term. The statistical design procedure for the S-MA chart is revised according to this result. Sensitivity study shorts that the steady-state ARL performance is still better than the CUSUM chart or the Exponentially Weighted Moving Average (EWMA) chart.

• 한국정밀공학회지
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• 제20권3호
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• pp.112-119
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• 2003

This paper presents the identification of rotor dynamic parameters. The solution of the system equation can be obtained using least square method. The sensitivity analysis is performed to extract optimized solution, which is considered to be insensitive to inherent measurement errors. The cosine and sine term of orbit shapes can be obtain ed through the by experiment of the orbit analysis at a different speed after doing orbit analysis at an arbitrary selected speed. This values measured time domain are used to search the stiffness and damping coefficients of rotor bearing.

• 한국수자원학회:학술대회논문집
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• 한국수자원학회 2016년도 학술발표회
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• pp.117-117
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• 2016

The natural hydrologic regime is intimately tied to the structure and function of stream and riparian ecosystems. Consequently, understanding the nature and extent of perturbations to the hydrologic regime, stemming from episodic-to-seasonal and longer-term climatic variations, as well as anthropogenic influences is an important starting point for developing an improved understanding of the coupled human-environmental systems. Herein, we pursued to explicate sensitivity of ecologically relevant flow metrics to climate variability and extremes in the five major river basins, Korea.

• Nuclear Engineering and Technology
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• 제53권2호
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• pp.509-521
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• 2021

In this paper, from a review of the size distribution of the bubbles during pool scrubbing obtained from experiments by EPRI, we apply the bubble size distributions to analyses on the decontamination factors of pool scrubbing via I-COSTA (In-Containment Source Term Analysis). We perform sensitivity studies of the bubble size on the various mechanisms of deposition of aerosol particles in pool scrubbing. We also perform sensitivity studies on the size distributions of the bubbles depending on the diameters at the nozzle exit, the molecular weights of non-condensable gases in the carrier gases, and the steam fractions of the carrier gases. We then perform analyses of LACE-ESPANA experiments and compare the numerical ~ results to those from SPARC-90 and experimental results in order to show the effect of the bubble size distributions.

• 한국방사성폐기물학회:학술대회논문집
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• 한국방사성폐기물학회 2003년도 가을 학술논문집
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• pp.401-405
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• 2003

The Advanced Spent Fuel Conditioning Process (ACP) have been developed at the Korea Atomic Energy Research Institute (KAERI) as an alternative for the effective conditioning of spent fuel far long-term storage or/and eventual disposal. This paper addresses the safeguardability of a pilot-scaled ACP facility and its sensitivity analysis. For this, a conceptual process and its material flow are analyzed using experiences from conventional fuel cycles, and measurement methods and their uncertainties are assumed for calculating MUF (Material Uncounted For) standards deviation (SD), We concluded from the preliminary analysis of the MUF SD that the pilot-scaled ACP facility with capacity of 30 MTHM/year can meet the International Atomic Energy Agency (IAEA) safeguards goals.

• 한국콘텐츠학회논문지
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• 제15권2호
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• pp.333-343
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• 2015

본 연구는 요양병원 간병사의 낙상예방인지도에 미치는 영향요인을 파악하기 위한 서술적 조사연구이다. 자료수집기간은 2014년 7월 1일부터 8월 31일까지였다. D광역시와 N시에 소재하는 7개 요양병원의 간병사를 대상으로 편의 표집 하였다. 수집된 자료 215부 중 200부를 분석에 이용하였다. 연구결과 첫째, 요양병원 간병사의 학력, 요양보호사 자격증 유무, 근무경력과 낙상관련 교육시간에 따른 낙상예방인지도에서 유의한 차이가 있었다. 둘째, 낙상예방건강신념 중 지각된유익성, 지각된장애성, 지각된민감성과 낙상예방효능감은 낙상예방인지도와 유의한 양의 상관관계가 있었다. 셋째, 요양병원 간병사에게 영향을 주는 개인적 특성을 통제한 상태에서 위계적 회귀분석한 결과, 정적영향요인은 지각된유익성, 낙상예방효능감, 지각된민감성, 부적영향요인은 근무경력으로 나타났으며, 이들 변수의 낙상예상인지도에 대한 설명력은 31.7%였다. 이러한 결과로 요양병원 간병사의 낙상예방인지도를 증가시키기 위해 간병사의 근무경력에 따른 낙상예방효능감과 건강신념 중 지각된 유익성과 지각된 민감성을 높일 수 있는 프로그램을 적극 모색해야할 것이다.