• 한국융합학회논문지
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• 제9권11호
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• pp.491-500
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• 2018

병원간호사가 인식하는 간호조직문화의 유형을 파악하고, 이러한 간호조직 문화와 전문적 삶의 질과의 관계를 확인하기 위함이다. 대상자는 충북의 C시에 소재한 일개 대학병원에 근무하는 간호사 216명이다. 자료 분석은 SPSS/WIN22.0 프로그램을 이용하여 분석하였다. 전문직 삶의 질의 하위영역인 공감만족에 미치는 영향요인으로는 혁신지향문화, 결혼상태, 관계지향문화가 유의한 예측변인으로 나타났고, 이차성 외상 스트레스는 연령, 업무지향문화, 위계지향문화가 유의한 예측변인으로 나타났으며, 소진은 관계지향문화, 임상경력, 위계지향문화가 유의한 예측변인으로 나타났다. 이 같은 결과를 토대로 조직 내 혁신지향문화 및 관계지향문화 형성을 위한 간호사들의 인식 전환 및 개선을 위한 중재프로그램 개발 및 임상에서의 효과를 검정하는 연구가 필요하며, 숙련되고 임상경험이 풍부한 우수한 간호사를 확보하기 위해 조직차원에서의 근무환경 및 처우 개선이 이루어져야 한다.

• 한국해양공학회지
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• 제32권6호
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• pp.492-501
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• 2018

The following results were obtained from a series of studies to accumulate data to reduce the coefficient of friction for press dies by performing tribological tests before and after the UNSM treatment of SM45C. The UNSM-treated material had a nano-size surface texture, high surface hardness, and large and deep compressive residual stress formation. Even when the load was doubled, the small amount of abrasion, small weight of the abrasion, and width and depth of the abrasion did not increase as much as those for untreated materials. When loads of 5 N, 7.5 N, and 10 N were applied to the untreated material of SM45C, the coefficient of friction was approximately 0.76-0.78. With the large specimen, a value of 0.72-0.78 was maintained at a load of 50 N despite the differences in the size of the wear specimen and working load. Tribological tests of large specimens of SM45C treated with UNSM under tribological conditions of 100 N and 50 N showed that the frictional coefficient and time constant stably converged between 0.7 and 0.8. The friction coefficients of the small specimens treated with UNSM showed values between 0.78 and 0.75 under 5 N, 7.5 N, and 10 N. The friction coefficients of the SM45C treated with UNSM were comparable to each other.

• Corrosion Science and Technology
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• 제18권1호
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• pp.1-7
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• 2019

To find proper lathe machining parameters for SA182 Grade 304 stainless steel (SS), six kinds of samples with different machining surface states were prepared using a lathe. Surface morphologies and microstructures of near surface deformed layers on different samples were analysed. Surface morphologies and chemical composition of oxide films formed on different samples in simulated primary water with $100{\mu}g/L\;O_2$ at $310^{\circ}C$ were characterized. Results showed that surface roughness was mainly affected by lathe feed. Surface machining caused grain refinement at the top layer. A severely deformed layer with different thicknesses formed on all samples. In addition to high defect density caused by surface deformation, phase transformation, residual stress, and strain also affected the oxidation behaviour of SA182 Grade 304 SS in the test solution. Machining parameters used for # 4 (feed, 0.15 mm/r; back engagement, 2 mm; cutting speed, 114.86 m/min) and # 6 (feed,0.20 mm/r; back engagement, 1 mm; cutting speed, 73.01 m/min) samples were found to be proper for lathe machining of SA182 Grade 304 SS.

• 한국기계가공학회지
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• 제18권4호
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• pp.16-25
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• 2019

Recently, due to labor shortages in rural areas within South Korea, the demand for upland-field machinery is growing. In addition, there is a lack of development of systematic performance testing of upland-field machinery. Thus, this study examined structural safety and drawbar pull based on soil properties, as a first step for systematic performance testing on the test bed. First, the properties of soil samples from 10 spots within the experimental site were examined. Second, the strain was measured and converted into stress on 8 points of an onion harvester that are likely to fail. More specifically, the chosen parts are linked to the power, along with the drawbar pull, using a 6-component load cell equipped between the tractor and the onion harvester. The water content of the soil ranged between 5.7%-7.5%, and the strength between 250-1171 kPa. The test soil was subsequently classified into loam soil based on the size distribution ratio of the sieved soil. The onion harvester can be considered as structurally safe based on the derived safety factor and the drawbar pull of 115-1194 kgf, according to the working speed based on agricultural fieldwork.

• Journal of Yeungnam Medical Science
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• 제36권3호
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• pp.219-224
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• 2019

Background: Korea has shown a rapid pace of aging and has become an aged society in a shorter period than Western countries. Therefore, it is important that middle-aged workers maintain their ability to work in the industrial field at the maximum level while maintaining their health. The purpose of this study was to analyze the factors affecting work ability and to use this data to maintain the working ability of middle-aged workers in the future. Methods: From 2015 to 2017, we surveyed 371 street cleaners who visited a health center for health promotion in a metropolitan city. The relationship between the general characteristics of the survey subjects and the Work Ability Index (WAI) was confirmed by a univariate analysis. Statistically significant (p<0.2) factors were selected and a multiple linear regression analysis was conducted with WAI scores as a dependent variable. Results: Age, body mass index, body fat percentage, the Alcohol Use Disorders Identification Test-Korea (AUDIT-K) scores, the Psychosocial Well-Being Index-Short Form (PWI-SF) scores, maximal oxygen consumption ($VO_{2max}$), and hypertension showed statistically significant correlations with the WAI in the univariate analysis. In the multivariate analysis, the $VO_{2max}$, AUDIT-K scores, and PWI-SF scores were included in the regression equation. $VO_{2max}$ had the greatest effect on the standardization coefficient indicating the relative contribution of independent variables, followed by the AUDIT-K scores and the PWI-SF scores. Conclusion: Programs to increase workers' physical work ability and alleviate psychosocial stress and drinking habits should be developed and implemented in the future.

• 한국인터넷방송통신학회논문지
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• 제19권5호
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• pp.195-203
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• 2019

본 논문에서는 서비스업 근로자들의 긍정심리자본이 서비스업 근로자들 개인의 완벽주의와 역할갈등을 통해 서비스 성과에 어떻게 미치는 지에 관하여 연구하였다. 이는 기존 서비스업 근로자들이 겪고 있는 감정노동이나 업무 스트레스 등의 문제점들을 실제적인 해결방안을 제시하고자 서비스업 근로자를 중심으로 분석하였다. 연구결과 긍정심리자본 요인 중 자기효능감과 희망, 복원력은 완벽주의와 역할갈등에 영향을 미치는 것으로 나타났으며, 낙관성만 아무런 영향을 미치지 않는 것으로 나타났다. 본 연구를 토대로 서비스업 근로자들이 가지는 실태와 문제점에 대해서 알 수 있었으며, 좀 더 나은 서비스를 제공받기 위해서는 서비스업 근로자들의 근로 환경적인 부분들을 개선 및 지원 해야 할 것으로 보여진다. 다시 말해 이러한 결과는 서비스업 근로자들의 자기효능감을 높이고 복원력을 증진 시켜야 한다는 것에 대한 부분을 의미하는 결과로 보여지며, 서비스업 관련자들이나 관련 기관에 기초자료로 제공하고자 한다.

• Steel and Composite Structures
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• 제39권5호
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• pp.631-643
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• 2021

The aim of this work is to study the hygro-thermo-mechanical bending responses of simply supported FG plate resting on a Winkler-Pasternak elastic foundation. The effect transverse shear strains is taken into account in which the zero transverse shear stress condition on the top and bottom surfaces of the plate is ensured without using any shear correction factors. The developed model contains only four unknowns variable which is reduced compared to other HSDTs models. The material properties of FG-plate are supposed to vary across the thickness of the plate according to power-law mixture. The differential governing equations are derived based on the virtual working principle. Numerical outcomes of bending analysis of FG plates under hygro-thermo-mechanical loads are performed and compared with those available in the literature. The effects of the temperature, moisture concentration, elastic foundation parameters, shear deformation, geometrical parameters, and power-law-index on the dimensionless deflections, axial and transverse shear stresses of the FG-plate are presented and discussed.

• Safety and Health at Work
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• 제12권1호
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• pp.127-132
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• 2021

Background: Herbicides such as glyphosate, paraquat, and 2,4-dichlorophenoxyacetic acid have been reported to cause adverse side effects through production of reactive oxygen species. However, there were no data representing the adverse effects of a mixture herbicide usage in farmers, especially the changes in oxidative marker and antioxidant defense. This study aimed to determine the urinary malondialdehyde (MDA) and glutathione (GSH) level in farmers using mixed herbicides. Methods: Ninety-three farmers were recruited, and two spot urine samples (before and after work) were collected. The urinary MDA level was evaluated by thiobarbituric acid reactive substance assay, and the urinary GSH level was determined using the enzymatic recycling method. Results: Sixty-two percent of the participants were men, and 59% of the participants worked in a farm for 20-40 years. The common combinations of herbicide usage were glyphosate with 2,4-dichlorophenoxyacetic acid (36.5%). There was no significant difference between pre- and post-work urinary MDA and GSH levels among the 3 groups of herbicides. However, the urinary MDA levels in farmers using the combination of glyphosate and paraquat were significantly higher than those found in farmers using glyphosate alone. The associated factors with changes in MDA levels found that the exposure intensity index (B = 0.154), the cumulative exposure intensity index (B = 0.023), and wearing gloves while working (B = -2.347) were found to be significantly associated with MDA level. Conclusion: The results suggest that the combined use of glyphosate and paraquat caused a significant increase in urinary MDA levels. Moreover, intensity of exposure to herbicide and wearing gloves were associated with the level of MDA.

• 한국콘텐츠학회논문지
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• 제22권10호
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• pp.374-382
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• 2022

본 연구는 2003년부터 1월부터 2022년 7월까지 국내 학술지에 게재된 임종간호 연구의 동향을 파악하는데 목적이 있다. 자료수집을 위해 '한국학술지인용색인'을 이용하였으며 총 115편의 논문을 분석하였다. 연구 결과, 임종간호 논문은 2008년 이후 꾸준히 증가하는 추세를 보였으며, 2017년에서 2019년에 가장 많은 논문이 출판된 것으로 확인되었다. 이들 연구는 주로 간호사와 간호대학생을 대상으로 수행되었고, 간호사의 경우 주로 상급종합병원, 요양병원, 종합병원에서 근무하는 것으로 파악되었다. 논문의 주요 주제로는 임종간호 태도, 수행, 임종간호 스트레스와 관련된 연구가 많았으며 연구 방법으로는 양적연구가 78.3%로 다수를 차지하였다. 논문의 IRB 승인 여부를 분석한 결과, IRB 승인을 받은 논문은 64.3%로 확인되었다. 이처럼 본 연구는 국내 학술지에 게재된 임종간호 연구의 동향을 분석하여 향후 연구방향을 제시했다는 점에서 연구의 의의가 있다.

• Safety and Health at Work
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• 제11권4호
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• pp.431-442
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• 2020

Background: Psychosocial risks are increasingly a type of risk analyzed in organizations beyond chemical, physical, and biological risks. To this type of risk, a greater attention has been given following the update of ISO 9001: 2015, more precisely the requirement 7.1.4 for the process operation environment. The update of this normative reference was intended to approximate OHSAS 18001: 2007 reference updated in 2018 with the publication of ISO 45001. Thus, the organizations are increasingly committed to achieving and demonstrating good occupational health and safety performance. Methods: The aim of this study was to characterize the psychosocial risks in a cryopreservation laboratory and to develop a predictive model for psychosocial risk management. The methodology followed to collect the information was the inquiry by questionnaire that was applied to a sample comprising 200 employees. Results: The results show that most of the respondents are aware of the psychosocial risks, identifying interpersonal relationships and emotional feelings as the main factors that lead to this type of risks. Furthermore, terms such as lack of resources, working hours, lab equipment, stress, and precariousness show strong correlation with psychosocial risks. The model presented in this study, based on artificial neural networks, exhibited good performance in the prediction of the psychosocial risks. Conclusion: This work presents the development of an intelligent system that allows identifying the weaknesses of the organization and contributing to the enhancement of the psychosocial risks management.