• 한국항해항만학회지
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• 제46권2호
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• pp.145-157
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• 2022

Due to the global epidemic of infectious diseases, it has become important for all industries to respond to the risk of infectious diseases. Ports in each country are also responding to the risk of infectious diseases, but the occurrence of infectious diseases in ports of various countries is causing a lot of damage to the logistics of ports. Korea is in the same situation, and cases of infectious diseases in ports are steadily being announced. Therefore, this paper conducted semi-quantitative Bow-Tie risk assessment by substituting measures to cope with infectious disease risks in Korean ports into actual cases of port infectious diseases in Korea, deriving improvements and suggesting directions. As a result, it was concluded that it was necessary to standardize some of the countermeasures against infectious diseases and develop more countermeasures.

• 국제학술발표논문집
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• The 3th International Conference on Construction Engineering and Project Management
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• pp.1548-1552
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• 2009

In the construction industry, IT has been an alternative for the enhancement of productivity and technical advances through a paradigm shift. While it has been recognized that the IT system will have a substantial influence on the industry, a quantitative valuation has been very limited. This paper has chosen EVMS (Earned Value Management System), which supports the integrated management of cost and schedule by utilizing IT tools, and which is the largest trend in the construction IT industry in Korea, in order to suggest an analysis model for the valuation of IT. The CVM (Contingent Valuation Method) is used to quantitatively measure intangible value of IT application. Then, a valuation and analysis model were suggested for the quantitative valuation of the effect of IT adoption. In terms of willingness to pay for EVMS, the expected benefits from the adoption of EVMS were US$ 584.52 per man annually. This research should be helpful for construction companies evaluating their investment to Project Management Information System.

• 대한인간공학회지
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• 제14권2호
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• pp.63-73
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• 1995

An approach to quantitative evaluation of product usability during the design and implementation phases of the product life cycle is presented. The evaluation starts by defining a set of usability characteristics, viz. physical, cognitive and affective characteristic. Each of these characteristics is assessed by a set of usability criteria, such as functionality, visual clarity, learmability, etc. The usability criterion is then evaluated by a checklist consisting of a detailed questionnaire. The fuzzy weighted-checklist method with linguistic variables is used for quantitative analysis. Also, the method for quantifying usability improve- ments in iterative design processes is considered. This analysis procides a quantit- ative measure, which reflects the degree of excellence of product usability during the design and development phases.

• 광물과 암석
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• 제34권4호
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• pp.227-239
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• 2021

자연산 시료의 광물함량을 X-선 분말회절분석에 의하여 실용적이고 효과적으로 정량분석하는 방법에 대하여 연구하였다. 이를 위하여 무작위 배향된 분말시료 마운트(randomly oriented powder sample mount)를 최적으로 제작하는 실험을 하였으며, 단일 피크강도를 표준물질과 비교하여 정량분석하는 레퍼런스 강도비(RIR) 방법과 X-선 회절도의 전패턴을 계산하는 리트벨드 방법의 효율성을 비교하는 실험을 수행 하였다. 또한, 비정질 광물이 포함된 시료를 리트벨드 방법에 의하여 정량분석하고 효율성을 검토하였다. 연구결과, 측면 마운팅(side mounting) 방법에 의하여 최적의 무작위 배향(random orientation)에 도달할 수 있었다. 또한, 특정 피크를 사용하는 RIR방법보다는 X-선 회절도의 전패턴을 사용하는 리트벨드 방법이 정량분석에 더 적합하였다. 그러나 어느 방법이든 분석기술 뿐만 아니라 분석자의 숙련된 경험을 필요로 한다. 리트벨드 방법에 의해 비정질 광물도 정량분석할 수 있었으며 분석결과는 지질해석을 가능하게 하였다.

• Natural Product Sciences
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• 제16권4호
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• pp.251-258
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• 2010

In this study, quantitative analysis for the quality evaluation of Salviae Miltiorrhizae Radix using HPLC/UV was developed. For quantitative analysis, six major bioactive compounds were determined. The separation conditions employed for HPLC/UV were optimized using ODS $C_{18}$ column ($250{\times}4.6\;mm$, $5\;{\mu}m$) with gradient condition of A (1% formic acid in $H_2O$) and B (acetonitrile : methanol : formic acid = 100 : 75 : 1) as the mobile phase at a flow rate of 1.0 mL/min and a detection wavelength of 280 nm. These methods were fully validated with respect to the linearity, accuracy, precision and recovery. The HPLC/UV method was applied successfully to the quantification of six major compounds in the Salviae Miltiorrhizae Radix. The results indicate that the established HPLC/UV method is suitable for the quantitative analysis.

• 품질경영학회지
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• 제46권3호
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• pp.441-452
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• 2018

Purpose: The purpose of this paper is to study quantitative risk grade assessment for objective government quality assurance activities based on risk management in initial mass production for weapon systems. Methods: The Defense quality management regulations and foreign risk assessment documents are referred to analyze problems performing quality assurance actives. The failure rate data, maintainability and cost of products have been studied to quantify the risk Likelihood and impact. The analyzed data were classified as risk grade assessment through K-means Cluster Analysis method. Results: Results show that a proposed method can objectively evaluate risk grade. The analyzed results are clustered into three levels such as high, middle and low. Two products are allocated high, eleven low and seven middle. Conclusion: In this paper, quantitative risk grade assessment methods were presented by analyzing risk ratings based on objective data. The findings showed that the methods would be effective for initial mass production for weapon systems.

• 한국안전학회지
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• 제31권5호
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• pp.141-148
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• 2016

There exists required safety integrity level (SIL) to assure safety in accordance with international standards for every electrical / electronics / control equipment or systems with safety related functions. The SIL is allocated from lowest level (level 0) to highest level (level 4). In order to guarantee certain safety level that is internationally acceptable, application of methodology for SIL allocation and demonstration based on related international standards is required. Especially, in case of the SIL allocation method without determining of quantitative tolerable risk, the additional review is needed to check whether it is suitable or not is required. In this study, the quantitative risk reduction model based on the safety integrity allocation results of railway platform screen door system using Risk Graph method has been examined in order to review the suitability of quantitative risk reduction according to allocated safety integrity level.

• 전기학회논문지
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• 제65권11호
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• pp.1943-1947
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• 2016

Korea Electrical Safety Cooperation(KESCO) have provided the electrical safety speed-call service from 2007 year. Purpose of the service is to reduce discomfort of electricity use and to prevent electrical accident like as electrical fire and shock accident by providing emergency treatment service on fault of the residential electrical facilities notified in the specific house like as a lower-income group and a social welfare facility. But efficiency and economic evaluation of the electrical safety speed-call service is impossible because analysis on the quantitative effect of the service is difficult. This paper presents cost-benefit analysis method and result of the electrical safety speed-call service. The presented cost-benefit analysis method has a two-step process: the first step is to measure quantitative electrical fire prevention effect of the service by using electrical accident statistics and developing outcome analysis logic model of the service effect, and the second step is to analysis cost-benefit(B/C)of the service by calculating quantitative benefit analysis on the measured quantitative electrical fire prevention effect. The results showed that cost-benefit(B/C)of the electrical safety speed-call service is over 4 after 2010 year.

• 한국콘텐츠학회논문지
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• 제17권4호
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• pp.541-549
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• 2017

본 연구에서는 정액연구 지원방식에 대한 정량평가 방법을 연구하고, 효율적인 평가방법을 확립하기 위한 모델을 만들었다. 첫째, 기존의 평가 시스템을 분석하여 몇 가지 문제점과 과제를 발견했다. 둘째, 정액연구 지원방식에 대한 정량평가 방법을 제안하고, 20만개 이상의 데이터와 모델을 이용하여 시뮬레이션하였다. 셋째, 제안된 모델을 시험하여 최적의 모델을 찾았다. 그리고 이러한 결과에 따라 몇 가지 정책적 시사점을 제시하였다.

• 한국진공학회지
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• 제11권4호
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• pp.218-224
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• 2002

반도체 박막의 분석에서 중요한 분석 대상의 하나인 미량 불순물의 정량분석을 위한 표준절차를 확립하고 그에 필요한 인증표준물질의 개발하였으며 이를 이용하여 국내공동분석을 실시하였다. 공동분석에 사용된 붕소가 균질하게 도핑된 박막 인증표준물질과 분석시편은 이온빔 스퍼터증착법에 의해 제작하였으며, 가장 정량적이고 감도가 높은 ICP-MS를 이용한 동위원소희석법으로 인증하였다. 이러한 인증표준물질과 SIMS에 의한 실리콘 내 의 붕소의 정량분석에 대해 이미 확립되어 있는 국제표준절차인 ISO/DIS-14237에 의거하여 국내 공동 분석을 시행하였는데, 이번의 공동분석에서 얻어진 붕소농도의 전체 평균값이 ICP-MS에 의한 인증치에 약 2% 정도의 오차를 보여주고 있어 분석의 정확성이 확인되었다.