• 한국멀티미디어학회논문지
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• 제13권12호
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• pp.1814-1819
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• 2010

Since 1987, when statistical analyzing guide for thermal life test of Accelerated Life Test(ALT) was proposed as ANSI/IEEE Std 101, this guide has been used widely for many experiment data. Shim(2004) had done Monte Carlo simulation to compare life of two different systems or materials, based on statistic values obtained from ANSI/IEEE Std 101 data. In this study, a profile analysis is proposed for comparing life of two different systems or materials, and some examples using pre-existing data are given.

• 대한산업공학회지
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• 제42권3호
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• pp.241-248
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• 2016

Plant life cycle consists of design, construction, certification, operation, and maintenance phases, and various and enormous plant life cycle data is involved in each phase. Plant life cycle data should be linked with each other based on its proper relationships, so that plant operators can access necessary plant data during their regular operations and maintenance works. Currently, the relationships of plant life cycle data may not be defined explicitly, or they are scattered over several plant information systems. This paper proposes high level design of a plant life cycle data management system based on pre-defined plant life cycle database design. ISO-15926 standard is adapted for the database design. User-interface designs of the plant life cycle data management system are explained based on analysis of plant owners' requirements. A conceptual design of the database is also described with the entity-relationship diagram.

• 한국문헌정보학회지
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• 제53권4호
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• pp.309-340
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• 2019

해외에서는 1990년대부터 데이터의 보존과 큐레이션을 위하여 데이터 라이프 사이클을 개발하였지만, 국내에서는 연구가 상당히 미흡한 실정이다. 본 연구에서는 연구 데이터 관리를 위한 데이터 라이프 사이클을 제안하기 위하여 DCC, ICPSR, IWGDD, DataONE, USGS 그리고 UKDA에서 개발된 데이터 라이프 사이클을 분석하였다. 분석 결과 공통적으로 도출된 구성 요소는 '계획', '생성 및 수집', '프로세스', '보존', '이관 및 폐기', '접근 및 이용', '기술', '보장' 그리고 '백업 및 보안' 등 9개이다. 또한 9개의 구성 요소를 단계별로 세분화하여 해당 단계에서 수행되어야 할 세부 내용을 기술하였다. 향후 국내에서 연구 데이터 관리를 위한 데이터 라이프 사이클을 개발할 때 본 연구의 내용을 적용할 수 있을 것으로 기대한다.

• Journal of the Korean Statistical Society
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• 제32권1호
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• pp.25-32
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• 2003

In this paper, we define the mean life process for the right censored data and show the asymptotic equivalence between two kinds of the mean life processes. We use the Kaplan-Meier and Susarla-Van Ryzin estimates as the estimates of survival function for the construction of the mean life processes. Also we show the asymptotic equivalence between two mean residual life processes as an application and finally discuss some difficulties caused by the censoring mechanism.

• 한국통신학회논문지
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• 제34권12B호
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• pp.1329-1335
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• 2009

본 논문에서는 무선 인체 통신 네트워크에서 응급 데이터를 전송할 때 전송 지연시간을 보장하는 DCTW(Dual Channel Transmission Scheme for WBAN)기법을 제안한다. 무선 인체 통신 네트워크에서는 의학적인 응용을 고려하고 개발되었기 때문에, 의학적 데이터의 중요도에 따른 차등 전송 기법이 필요하다. DCTW에서는 응급 데이터 프레임의 전송을 위하여 협대역 채널을 사용하며 일반 데이터 프레임 전송을 위하여 광대역 채널을 사용한다. 협대역 채널을 통하여 응급데이터를 전송하기 때문에 긴급한 데이터를 보내고자 하는 노드가 데이터를 신속히 전송할 수 있도록 하여 전송 지연시간을 효과적으로 감소시켰다. 본 논문은 다양한 성능 분석을 통해 DCTW 기법이 다른 기법에 비해 우수함을 증명하였다.

• 품질경영학회지
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• 제24권4호
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• pp.29-43
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• 1996

This paper identifies these data by the data diagnosis in lognormal distribution and presents the method to obtain exact parameter estimates and confidence intervals of regression line. The life-stress relationship uses Arrhenius model and life data generate Class-H insulation complete data by simulation. Also, the method to estimate parameters uses least squares estimation and externally Studentized residuals can be used as test statistics for identifing outliers. And influential cases are identified by Cook's distance. This research is intended to obtain the useful information for the life of products and test method, to save time and costs, and to help optimum accelerated life test plans.

• 한국컴퓨터정보학회논문지
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• 제22권3호
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• pp.69-79
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• 2017

In this paper, we propose our four-phase life cycle of P2P botnet with corresponding detection methods and the future direction for more effective P2P botnet detection. Our proposals are based on the intensive analysis that compares existing P2P botnet detection schemes in different points of view such as life cycle of P2P botnet, machine learning methods for data mining based detection, composition of data sets, and performance matrix. Our proposed life cycle model composed of linear sequence stages suggests to utilize features in the vulnerable phase rather than the entire life cycle. In addition, we suggest the hybrid detection scheme with data mining based method and our proposed life cycle, and present the improved composition of experimental data sets through analysing the limitations of previous works.

• 성인간호학회지
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• 제14권3호
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• pp.438-448
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• 2002

Purpose: This study is aimed to search the lived experiences of the participants and to analyze the contents so that we can be assured about what the elderly wish and find the appropriate nursing intervention for them in real life. Method: This is based on a phenomenological approach. Participants of this study consist of people older than 65 years old. Data was collected from May to August in 2001. Data collection was done through in-depth interviews and observations. The time used in each interview was from 50 minutes to 2 hours. Each participant was interviewed three to five times. Giorgi's phenomenological analysis was used in data analysis. Result: The elder's wishes are 1) a respected life, 2) a happy life, 3) a peaceful life, 4) a independent life, 5) a financially independent life, 6) a satisfactory life, 7) a mind to depend on someone, 8) a serving life, 9) a historic family, 10) a happy-ending life. Conclusion: The study will contribute for the nursing intervention to enhance the quality of life and successful aging of the elderly.

• 아동학회지
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• 제30권1호
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• pp.11-25
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• 2009

This study aimed to investigate protective factors and risk factors in elementary students' life satisfaction. Participants were 2844 (1524 boys, 1320 girls) children who grades were 4th, 5th, 6th in KYPS (Korea Youth Panel Survey). Data mining decision tree model was performed with sex, appearance, delinquency, family income, attachment to parents, parental monitoring, attachment to teachers, academic achievement, peer delinquency, and attachments to peer. The results revealed that : (1) For 4th graders, academic achievement, attachment to parents, and appearance were significant predictors for life satisfaction. (2) For 5th graders, attachment to parents, academic achievement, parental monitoring and appearance were significant predictors for life satisfaction. (3) For 6th graders, attachment to parents, appearance, parental monitoring and delinquency were significant predictors for life satisfaction. Protective factors and risk factors were changed according to interactions between significant independent variables. These results suggest that children's diverse conditions should be considered individually in programs for children's life satisfaction.

• 국제학술발표논문집
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• The 6th International Conference on Construction Engineering and Project Management
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• pp.271-275
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• 2015

A variety of evaluation application and initiatives on the adoption of Building Information Modelling (BIM) have been introduced in recent years. Most of which however, focused mainly on evaluating design to construction phase-processes, or BIM utilization performances. Through studying existing publications, it is found that continuous utilization of BIM data throughout the building's life cycle is comparatively less explored or documented. Therefore, this study looks at improving this incomplete life cycle condition with the concept that accumulated BIM data should be carried forward and statistically quantified for cross comparison, in order to facilitate practitioners to better improve the projects the future. Based on this conceptual theory of moving towards a closedloop BIM building life cycle, this study explores, through existing literature, the use of cloud based computing as the means to quantify and adaptively utilize BIM data. Categorization of BIM data relations in adaptive utilization of BIM data is then suggested as a initial step for enhancing cross comparison of BIM data in a cloud environment.