• Journal of Hospice and Palliative Care
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• 제16권2호
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• pp.108-117
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• 2013

목적: 본 연구의 목적은 1) 죽음에 대한 태도와 대처정도, 생애 말기환자 간호인식 및 간호수행 정도를 파악하고, 2) 그들 간의 상관관계를 살펴보고, 3) 생애 말기환자 간호수행에 영향을 미치는 요인을 파악하고자 함이다. 방법: 3개 대학병원의 임종 다빈도 부서인 종양내과병동, 중환자실, 응급실에 근무하는 187명의 간호사를 대상으로 하였다. 연구 도구로는 '다차원 죽음에 대한 태도 척도', '죽음에 대한 대처정도 척도', '생애 말기환자 간호에 대한 인식 척도', '생애 말기환자 간호에 대한 수행 척도'를 사용하였다. 자료는 기술 통계, 상관관계, 다중 회귀분석을 수행하였다. 결과: 첫째, 생애 말기환자 간호수행은 결혼 유무, 종교, 근무 부서, 말기환자 간호에 대한 교육 참여 여부에 따라 의미 있는 차이를 보였다. 둘째, 생애 말기환자 간호수행은 죽음에 대한 태도(P=0.014), 죽음에 대한 대처(P=0.003), 생애 말기환자 간호인식(P<0.001)과 양의 상관관계를 보였다. 셋째, 생애 말기환자 간호수행이 근무부서(P<0.001), 생애 말기환자 간호인식(P<0.001)에 영향을 받는 것으로 나타났다. 결론: 생애 말기환자 간호수행이 근무 부서, 생애 말기환자 간호인식에 영향을 받으므로, 근무 부서에 따라 차별화된 생애 말기환자 간호인식을 향상시킬 수 있는 교육이 필요하다.

• 한국군사과학기술학회지
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• 제10권2호
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• pp.115-125
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• 2007

The ubiquitous embedded computers are firmly established as the basic electronic component of design that control military systems. Such applications can be found everywhere in the field of military system. A embedded computer is required to redesign when system needs performance upgrade or production-state of processor is NRND or EOL. This paper describes a scheme about impact analysis of designing processor alteration on embedded computer. In this case, hardware architecture and interrupt source of target system must be considered. Also, performance and throughput of that must be analyzed.

• 산업경영시스템학회지
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• 제32권4호
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• pp.192-202
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• 2009

Disassembly of products at their end-of-life (EOL) is a prerequisite for recycling or remanufacturing, since most products should be disassembled before being recycled or remanufactured as secondary parts or materials. In disassembly sequence planning of EOL products, considered are the uncertainty issues, i.e., defective parts or joints in an incoming product, disassembly damage, and imprecise net profits and costs. The paper deals with the problem of determining the disassembly level and corresponding sequence, with the objective of maximizing the overall profit under uncertainties in disassembly cost and/or revenue. The solution is represented as the longest path on a directed acyclic graph where parameter (arc length) uncertainties are modeled in the form of intervals. And, a heuristic algorithm is developed to find a path with the minimum worst case regret, since the problem is NP-hard. Computational experiments are carried out to show the performance of the proposed algorithm compared with the mixed integer programming model and Conde's heuristic algorithm.

• 한국조명전기설비학회:학술대회논문집
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• 한국조명전기설비학회 2008년도 추계학술대회 논문집
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• pp.7-11
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• 2008

형광등은 방전등의 일종으로 방전현상을 이용하여 전기에너지를 빛으로 변환하는 광원으로 램프의 점등 시에 나타나는 부저항 특성 때문에 반드시 점등회로를 필요로 한다. 방전등의 광원특성과 안정기의 변환특성은 밀접한 관련을 가지고 있다. 따라서 양 특성의 정합성립을 위하여 사용조건 및 경제성을 고려한 최적회로 설계지침을 내놓는 것은 매우 중요하다. 본 논문에서는 형광등용 전자안정기에 있어 부하인 형광램프의 수명말기에 나타나는 화재, 광효율 저감 등 여러 가지 문제점을 개선할 수 있는 수명말기 검측과 수명말기 표시기능 개발에 대하여 고찰해본다.

• 사물인터넷융복합논문지
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• 제6권1호
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• pp.45-53
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• 2020

본 연구는 일 종합병원 간호사의 임종기 치료, 연명치료, 사전의료의향서에 대한 지식과 사전의료의향서 작성에 대한 교육요구도의 상관관계를 확인하는데 그 목적이 있다. 연구의 대상자는 서울시 소재 일 종합병원에 근무하는 임상경력 3개월 이상의 간호사 169명이다. 자료수집기간은 2018년 7월 19일부터 7월 26일까지였고, 수집된 자료는 SPSS/WIN 23.0을 이용하여 분석되었다. 간호사의 임종기 치료에 대한 지식은 8.56±1.61점(11점 만점), 연명치료에 대한 지식은 5.11±0.94점(6점 만점), 사전의료의향서에 대한 지식은 8.02±1.33점(9점 만점)이었고, 사전의료의향서 작성에 대한 교육요구도는 4.31±0.58점(5점 만점)이었다. 사전의료의향서 작성에 대한 교육요구도는 연명치료에 대한 지식수준이 높을수록 높았고(r=.182, p=.018), 사전의료의향서에 대한 지식수준이 높을수록 높은 것으로 나타났다(r=.234, p=.002). 본 연구결과는 향후 사전의료의향서 교육프로그램 개발을 위한 기초자료를 제공하는데 그 의의가 있다.

• 스마트미디어저널
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• 제11권11호
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• pp.63-74
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• 2022

Nowadays, lithium-ion battery has become more popular around the world. Knowing when batteries reach their end of life (EOL) is crucial. Accurately predicting the remaining useful life (RUL) of lithium-ion batteries is needed for battery health management systems and to avoid unexpected accidents. It gives information about the battery status and when we should replace the battery. With the rapid growth of machine learning and deep learning, data-driven approaches are proposed to address this problem. Extracting aging information from battery charge/discharge records, including voltage, current, and temperature, can determine the battery state and predict battery RUL. In this work, we first outlined the charging and discharging processes of lithium-ion batteries. We then summarize the proposed techniques and achievements in all published data-driven RUL prediction studies. From that, we give a discussion about the accomplishments and remaining works with the corresponding challenges in order to provide a direction for further research in this area.

• 산업공학
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• 제19권3호
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• pp.181-189
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• 2006

This study introduces an overall framework for RFID applications in product lifecycle management(PLM). PLM is a new strategic approach to manage product related information efficiently over the whole product lifecycle. Recently, with emerging technologies such as radio frequency identification(RFID), global positioning system(GPS), and wireless communication, PLM provides a new environment that enables us to gather and analyze product lifecycle information, and make decisions on several issues without spatial and temporal constrains. However, a PLM system just provides us with new opportunities to gain the PLM system, first and foremost, it is necessary to look into its overall framework in the viewpoint of hardware, software, and business model. For this purpose, in this study, first, we introduce the technical framework of the new PLM environment with the concept of extended RFID system, called product embedded information device(PEID). Then, for each lifecycle phase such as beginning of life(BOL), middle of life(MOL), and end of life(EOL), we explore several research problems that become highlighted under the new PLM environment.

• 산업경영시스템학회지
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• 제35권4호
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• pp.98-109
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• 2012

Recently, the optimisation of end-of-life (EOL) product remanufacturing processes has been highlighted. In particular, computer remanufacturing becomes important as the amount of disposed of computers is rapidly increasing. At the computer remanufacturing, depending on the selections of used computer parts, the value of remanufactured computers will be different. Hence, it is important to select appropriate computer parts at the reassembly. To this end, this study deals with a decision making problem to select the best combination of computer parts for minimising the total remanufacturing computer cost. This problem is formulated with an integer nonlinear programming model and heuristic search algorithms are proposed to resolve it.

• Industrial Engineering and Management Systems
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• 제13권1호
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• pp.52-66
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• 2014

Promotion of a closed-loop supply chain requires disassembly systems that recycle end-of-life (EOL) assembled products. To operate the recycling disassembly system, parts selection is environmentally and economically carried out with non-destructive or destructive disassembly, and the recycling rate of the whole EOL product is determined. As the number of disassembled parts increases, the recycling rate basically increases. However, the labor cost also increases and brings lower profit, which is the difference between the recovered material prices and the disassembly costs. On the other hand, since the precedence relationships among disassembly tasks of the product also change with the parts selections, it is also required to optimize allocation of the tasks in designing a disassembly line. In addition, because information is required for such a design, the recycling rate, profit of each part and disassembly task times take precedence among the disassembly tasks. However, it is difficult to obtain that information in advance before collecting the actual EOL product. This study proposes and analyzes an optimal disassembly system design using integer programming with the environmental and economic parts selection (Igarashi et al., 2013), which harmonizes the recycling rate and profit using recyclability evaluation method (REM) developed by Hitachi, Ltd. The first stage involves optimization of environmental and economic parts selection with integer programming with ${\varepsilon}$ constraint, and the second stage involves optimization of the line balancing with integer programming in terms of minimizing the number of stations. The first and second stages are generally and mathematically formulized, and the relationships between them are analyzed in the cases of cell phones, computers and cleaners.

• 보건행정학회지
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• 제27권2호
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• pp.167-176
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• 2017

Background: This study aimed to analyze the impact of community health care resources on the place of death of older adults with dementia compared to those with cancer in South Korea, using public administrative big data. Methods: Based on a literature review, we selected person- and community-level variables that can affect older people's decisions about where to die. Data on place-of-death and person-level attributes were obtained from the 2013 death certification micro data from Statistics Korea. Data on the population and economic and health care resources in the community where the older deceased resided were obtained from various open public administrative big data including databases on the local tax and resident population statistics, health care resources and infrastructure statistics, and long-term care (LTC) insurance statistics. Community-level data were linked to the death certificate micro data through the town (si-gun-gu) code of the residence of the deceased. Multi-level logistic regression models were used to simultaneously estimate the impacts of community as well as individual-level factors on the place of death. Results: In both the dementia (76.1%) and cancer (87.1%) decedent groups, most older people died in the hospital. Among the older deceased with dementia, hospital death was less likely to occur when the older person resided in a community with a higher supply of LTC facility beds, but hospital death was more likely to occur in communities with a higher supply of LTC hospital beds. Similarly, among the cancer group, the likelihood of a hospital death was significantly lower in communities with a higher supply of LTC facility beds, but was higher in communities with a higher supply of acute care hospital beds. As for individual-level factors, being female and having no spouse were associated with the likelihood of hospital death among older people with dementia. Conclusion: More than three in four older people with dementia die in the hospital, while home is reported to be the place of death preferred by Koreans. To decrease this gap, an increase in the supply of end-of-life (EOL) care at home and in community-based service settings is necessary. EOL care should also be incorporated as an essential part of LTC. Changes in the perception of EOL care by older people and their families are also critical in their decisions about the place of death, and should be supported by public education and other related non-medical, social approaches.