• 한국분무공학회지
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• 제29권2호
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• pp.91-97
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• 2024

When investigating the droplet, spray, and impact of liquid on a solid plate, backlight imaging has been widely used to understand these phenomena. However, some previous studies have suffered from poor image quality. In this study, various combinations of image processing algorithms, such as white image correction, histogram equalization, CLAHE, Otsu's binarization, and multi-Otsu's binarization, have been applied to flash boiling spray images to enhance image quality for qualitative observation and semi-quantitative spray angle evaluation. To acquire images with high contrast for qualitative observation, applying CLAHE was effective, making small droplets and detailed shapes of the jet noticeable. However, when images were averaged to determine spray angle or penetration length based on intensity, this method induced artifact unphysical patterns, thus requiring careful consideration. Based on the algorithm proposed in this study, the spray angle variation according to injection pressure and temperature has been calculated, showing a reasonable trend.

• Industrial Engineering and Management Systems
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• 제12권4호
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• pp.389-405
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• 2013

A facility layout design (FLD) problem can be generally introduced as assignment of facilities (departments) to a site such that a set of criteria are satisfied or some objectives are minimized (maximized). Hence, it can be considered as a multi-criteria problem due to the presence of qualitative criteria such as maintenance or flexibility and quantitative criteria such as the total cost of handling material. The VIKOR method was developed to solve multiple criteria decision making problems with conflicting and non-commensurable (different units) criteria, assuming that compromising is acceptable for conflict resolution, the decision maker wants a solution that is the closest to the ideal, and the alternatives are evaluated according to all established criteria. This paper proposes a hierarchical analytic hierarchy process (AHP) and VIKOR approach to solve the FLD problem. A computer-aided layout-planning tool is adopted to generate the facility layout problems, as well as their quantitative data. The qualitative performance measures are weighted by AHP. VIKOR is then used to solve the FLD problem. Finally, the proposed integrated procedure is applied to three real-time examples.

• 한국수소및신에너지학회논문집
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• 제31권1호
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• pp.65-72
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• 2020

In this study, the purpose is to identify the risks of the facilities of packaged hydrogen stations. As a risk identification method, failure mode & effect analysis (FMEA), a qualitative risk assessment, was used to analyze failure mode and effects of component of each facility. The analysis criteria were used to derive the risk priority number (RPN) using the 5-point method according to severity, incidence, and detectability. The study analyzed a total of 141 components of 23 types that can be identified on the design of the packaged hydrogen filling station. As a result, 683 types of failures and their causes and effects were identified. and the RPN was number of a total of 1,485. Of these, 10 failure types with a RPN value of 40 or more were deemed necessary. In addition, a list of failure types with a severity score of 5 was identified and analyzed.

• 문화기술의 융합
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• 제3권4호
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• pp.159-163
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• 2017

본 연구는 플립러닝 수업을 간호학과 학생들에게 적용하여 그들의 수업 경험을 이해하는 데 있다. 플립러닝 수업에 참여한 간호대학생들의 학습경험에 대한 연구로써, 각 개인의 경험에 의미를 두어 본질을 파악하는 데 목적을 두는 Colaizzi의 현상학적 분석방법을 적용하여 그 진술을 분석하고 경험의 의미를 파악하고자 실시하였다. 간호학과 학생들의 플립러닝 수업 경험의 의미를 Colaizzi의 현상학적 분석방법을 적용하여 분석한 결과 7개의 주제와 3개의 중심의미가 도출되었다. 본 연구를 바탕으로 간호학 전공교과목에서 플립러닝 교수법을 확산하기 위한 질적 및 양적 연구를 확대해야 함을 제언한다.

• 지역사회간호학회지
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• 제21권4호
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• pp.532-540
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• 2010

Purpose: The purpose of this study was to compare similarities and differences in research trends for community health nursing between Korea and Japan. Methods: Comparison was made in terms of research design, data collection and sampling method, and key concepts from community health nursing research by literature review. We analyzed original articles from representative Journals covering community health nursing research from 2004 to 2008. Results: We found that research design was quite different between the two countries. Quantitative research design was dominant in Korea, while qualitative and qualitative research designs were used equally in Japan. In particular, outcome research was found only in Korean papers. Conclusion: Based on the comparison, the following recommendations are suggested related to the strengths and weaknesses of research concepts and methods observed in each country. It is suggested that future collaboration should be undertaken especially to improve the diversity of research design and method. More diverse research designs should be used in both countries. Particularly in today‘s aged society, evidence-based research and outcome research are needed for community health nursing in both countries.

• 한국보건간호학회지
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• 제32권2호
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• pp.221-234
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• 2018

Purpose: This mixed method study was conducted to analyze the changes in nursing students' practice environment due to comprehensive nursing care services. Methods: For the quantitative study, a checklist and practicum evaluation surveys completed by 85 students were analyzed using SPSS utilizing a Mann-Whitney U test. For the qualitative study, 13 students with experience of practice in comprehensive nursing care service units participated in focus group interviews. The data were analyzed using a content analysis method. Results: From the qualitative findings, four themes and eight sub-themes were identified. The four themes were , , , and . The quantitative findings found that students could observe and perform fewer nursing tasks and the students' satisfaction with practice was lower in the comprehensive nursing care service unit. Conclusion: This study was meaningful in that it analyzed the experiences of nursing students in comprehensive nursing care services.

• 재활간호학회지
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• 제11권1호
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• pp.32-40
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• 2008

Purpose: This study used a phenomenological method, which is a qualitative study, in order to understand the vivid experience of parents who have a disabled child. Methods: The number of participants was 10. The subjects of this study were parents who are raising their disabled child who attends a special school or normal middle or high schools in D city. The period for collecting materials was from September 2005 to July 2007. The phenomenological analysis method suggested by Giorgi was used. Results: The meanings of the child parenting experience of parents with a disabled child are (1) feeling of frustration of the delayed treatment, (2) difficult to accept the diagnosis of disability, (3) having eyes centered on her child, (4) accepting the disabled child, (5) giving all his energy to his disabled child, (6) making efforts for his family's unity, (7) recognizing the difficulty of parenting disabled child, (8) recognizing the difficulty of education for disabled child, (9) feeling pitiful for his their normal children, (10) planning for disabled child's future. Conclusions: All the programs for disabled child should be programed for their entire life. It is necessary to provide physical, psychological, emotional, social and economic nursing intervention to relieve or reduce the burden of parents with disabled children.

• 한국융합학회논문지
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• 제8권8호
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• pp.115-125
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• 2017

본 연구는 마음 가다듬음과 살핌 명상을 경험한 간호대학생을 대상으로 질적연구방법을 융합하여 내용을 살펴보고 기술하는 것을 목적으로 한다. 자료는 간호대학생 10명으로부터 수집되었으며 내용분석방법으로 분석되었다. 분석결과 4개의 주제묶음이 확인되었다; '삶을 성찰하며 참회한 후 태도의 변화가 일어남', '정신이 건강해짐', '주체적 삶의 주인으로 변화하게 됨', '존재의 가치를 인식하고 자기가치를 실현하고자 함'. 본 연구에서는 마음 가다듬음과 살핌 명상이 간호대학생의 도덕성을 회복하도록 하는 중재프로그램으로 이용 가능함을 논의하였다. 추후 마음 가다듬음과 살핌 명상을 수정 보완하여 다양한 대상자에 대한 확대연구가 필요하다.

• 의료ㆍ복지 건축 : 한국의료복지건축학회 논문집
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• 제17권2호
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• pp.17-25
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• 2011

This study analyzes the research trends and evaluates the specialized characteristics of the journal of Korea healthcare architecture. Total 308 papers from 1995(Vol.1) to 2010(Vol.16) were analyzed by following seven criteria: (1) research focus by analyzing the key words of each paper; (2) research method(qualitative and quantitative research); (3) research nature(practical/prescriptive vs. theoretical/normative); (4) research target(healthcare, welfare, and others); (5) researcher characteristics(position, major, and numbers of author); (6) supported research(in-university, out-of-university, and out-of-pocket funds); and (7) international study. The research findings include followings. First, research focus lies in the function of healthcare and welfare facilities. Second, qualitative method is the dominant form of research. Third, practical/prescriptive research continuously increases. Fourth, research target is mainly a healthcare facility, while the research of welfare facility is increasing. Fifth, the considerable numbers of first author are graduate students. Sixth, out-of-university research funds increase. Finally, international studies related to Japan are mostly published.

• 한국산업보건학회지
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• 제23권2호
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• pp.84-94
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• 2013

Objectives: The objective of this study is to identify the composition of dominant microorganisms in waste handling industries. Methods: We collected airborne bacteria and fungi by agar plate impaction method in recyclable waste sorting industry, food recycling industry, landfill and incineration. Isolated dominant microorganisms were identified by VITEK system or morphological analysis. Results: We isolated totally 330 microorganisms in the process and outdoor. Bacillus was the most dominant genus in the all industries, and Sphingomonas, Acinetobacter, Staphylococcus, and Proteus was dominant bacterial genus. The dominant genus of fungi was Penicillium, Aspergillus, and Cladosporium in each industries. Enterobacter, Pseudomonas, Klebsiella, and Proteus was identified as the dominant gram negative bacteria. The ratio of bacteria being biosafety levels(class 1 or 2) was 58.3~77.8%. Conclusions: This study has investigated the dominant microorganisms in the waste handling industries. The genus of dominant microorganisms was similar among the industries but the composition was different. We used biosafety levels as qualitative method, but further studies are needed about specific process of qualitative evaluation methods.