• 한국산업보건학회지
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• 제29권1호
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• pp.69-81
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• 2019

Objective: The purpose of this study was to find out what kind of change in death rate when job stress is solved by calculating job stress relieve coefficient. Methods: This study used the data of the fourth working condition survey. Regression analysis was used to determine the relationship between health effects recognition and Death rate per 10,000 workers. After that the recognizing and non - recognizing groups were categorized by health effects recognition, and the differences between the two groups were confirmed by cross tabulation analysis. Results: Regress analysis P-value is 0.011 and $R^2$ is 0.979. Death rate per 10,000 worker increased with the increase in the number of non - health impact recognizing group. The relieve factors were (1) work culture(2.859) (2) physical environment(2.184), (3) improper reward (1,839), (4) relationship conflict(1.646), (5) job requirement(1.613), (6) job autonomy(1.354), (7) job instability(1.334), And (8) organizational system(1.201). The higher the relieve coefficient is, the higher the probability of belonging to the non - health impact recognizing group when there is no job stress factor. Conclusions: When job stress is resolved, there is a high probability that the health impact recognition is reduced, which can lead to an increase in death rate. but according to previous studies, Job stress can cause accidents by reducing the safety behavior of accidents. The job stress management plan should simultaneously consider reducing job stress and increasing health impact recognition.

• 로봇학회논문지
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• 제11권2호
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• pp.83-91
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• 2016

Most of outdoor mobile robots have a suspension on each wheel in order to relieve the shock by ground obstacles and to improve the driving stability. Typically, in the actual operations, the suspensions have been used under a given set of conditions as all the damping and spring coefficients of the suspensions are fixed. However, it is necessary to readjust the coefficients of the suspensions according to surface conditions that may cause the unstable shaking of a robot body at high speed driving. Therefore, this paper is focused on the mobility analysis of an outdoor robot when the coefficients of suspensions (in particular, damping coefficients) are changed while driving on an uneven road surface. In this paper, a semi-active suspension with twelve damping coefficient levels was used and a small sized vehicle with the suspensions was employed to analyze the mobility dependent on a change of the damping coefficient. And the mobility was evaluated through driving experiments on a bumped slope.

• Tribology and Lubricants
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• 제29권6호
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• pp.353-359
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• 2013

The rollers and/or races in cylindrical and tapered roller bearings should be profiled to relieve high edge stress concentrations caused by their finite lengths and misalignment. In this study, a numerical analysis was performed to investigate the elastohydrodynamic lubrication (EHL) of a Lundberg profile-type cylindrical roller. A finite difference method with fully nonuniform grids and the Newton-Raphson method were used to present detailed EHL pressure distributions and film shapes, as well as the variations in the minimum and central film thicknesses with the profile modification coefficient. In the Lundberg profile, the maximum pressure and minimum film thickness always occurred near the edges. Proper modification of the Lundberg profile considerably increased the minimum film thickness.

• 한국지반공학회논문집
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• 제33권12호
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• pp.75-80
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• 2017

도심 홍수 및 물순환 왜곡을 해결하기 위한 대표적 저영향개발기술 중 하나인 투수 블록포장이 포장시설로서 활발하게 적용되고 있다. 하지만 국내의 경우 설계법이 잘 정립되어있지 않고 국외에선 AASHTO 93 연성포장 설계법을 구조설계법으로 적용하고 있긴 하나 투수성 포장재료의 상대강도계수에 대한 정보가 부족하여 다양한 재료에 대한 설계적용이 어렵다는 단점이 있다. 이에 따라 본 연구에선 평판재하시험을 통해 투수 블록포장 재료의 상대강도계수를 산정하는 방법을 제시하고, 투수성 포장 실증현장에서 평판재하시험을 실시하여 이를 산정하였다. 산정된 개립도 골재와 투수 블록포장 표층의 상대강도계수는 전체적으로 기존의 값과 유사한 경향을 나타냈다. 본 연구에서 제시한 방법을 사용하여 향후 설계를 위한 투수 블록포장 재료의 상대강도계수를 산정할 수 있을 것으로 판단된다.

• 한국콘텐츠학회:학술대회논문집
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• 한국콘텐츠학회 2006년도 춘계 종합학술대회 논문집
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• pp.75-79
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• 2006

본 연구는 정부의 대표적인 국토균형발전정책 수단인 행복도시와 혁신도시의 개발에 따라 우리나라 국토불균형이 어느 정도 완화될 수 있는지를 파악해보고자 한다. 본 연구에서는 국토의 불균형문제를 인구의 공간적 불균형분포에 기인한 것으로 보았으며, 불균형 측정지표로는 정책입안단계에서 보편적으로 사용하고 있는 지니계수(Gini's Coefficient)를 사용하였다. 분석의 결과 행복도시와 혁신도시의 건설은 미래 국토불균형을 다소나마 완화시키는 것으로 예측되었다. 그러나 행복도시와 혁신도시는 향후 심화될 국토불균형에 비하면 그 효과는 매우 미미할 것으로 예측되었다. 따라서 국토불균형을 완화시키고 균형발전을 위해서는 지속적이고 다양한 균형발전정책의 개발이 필요할 것으로 판단되었다.

• 한국직업건강간호학회지
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• 제24권4호
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• pp.323-330
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• 2015

Purpose: The purpose of this study was to investigate job stress, coping type, and job satisfaction in firefighters. Methods: It was a descriptive study, and 114 subjects were recruited during July to August, 2014. The data were analyzed by t-test, ANOVA (Sheffe's test), and Pearson's correlation coefficient using SPSS/WIN 22.0. Results: The job stress level of subjects was 47.45, coping type was 2.38 and the level of subjects' job satisfaction was 2.97. The job satisfaction was very closely negatively correlated with the job stress (r=-.66, p<.001). Conclusion: These results may contribute to better understanding of stress degree, coping type, and job satisfaction in firefighters. Further follow-up study on firefighters is necessary to relieve their job stress and increase active coping type.

• 한국직업건강간호학회지
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• 제17권2호
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• pp.146-154
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• 2008

Purpose: The purpose of this study is to investigate the degree of job stress and job satisfaction and the relationship between job stress and job satisfaction of Medical Aid Client Managers. Method: Data were collected from 185 Medical Aid Client Managers in 234 areas between April 2-15, 2007. Collected data was analyzed for the frequency, t-test, ANOVA, Pearson's Correlation Coefficient etc. Results: The average score of job stress was 2.6. Job instability was highest as 2.9 and job autonomy was lowest as 2.2. in eight items. When the job stress of Medical Aid Client Managers was converted to 100 point, the average was 51.7 and ranked in upper 50% of Korean woman workers' job stress. Among the eight items, because the relationship satisfaction and the instability of duty regime ranked in upper 25% of Korean woman workers' job stress, those items were identified to have high stress. The average score of job satisfaction was 2.3 out 4.0 which could be interpreted as unsatisfactory. The correlation between the job stress and the job satisfaction demonstrated significant difference. Decrease of the job satisfaction was associated with increase of the job stress. In regard to the eight items, the inverse correlation was demonstrated to be significant in organization, inappropriate compensation, and workplace culture. Conclusion: Medical Aid Client Managers have high stress in carrying out their duties. They have experienced very severe instability in their duty regime. Also, they have felt alienated from their organization and experienced unfair rewards. They had low duty satisfaction but got a heavy workload and experienced overtime work. To relieve job overburden of Medical Aid Client Managers. it was necessary to improve business system and also was necessary to relieve a regional disparity of business charge.

• 센서학회지
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• 제26권6호
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• pp.438-444
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• 2017

In this paper, we focus on optimization of the in-situ phosphorous (P) doping of low-pressure chemical vapor deposited (LPCVD) poly Si resistors for obtaining near-zero temperature coefficient of resistance (TCR) at temperature range from 25 to $600^{\circ}C$. The deposited poly Si films were annealed by rapid thermal anneal (RTA) process at the temperature range from 900 to $1000^{\circ}C$ for 90s in nitrogen ambient to relieve intrinsic stress and decrease the TCR in the poly Si layer and get the Ohmic contact. After the RTA process, a roughness of the thin film was slightly changed but the grain size and crystallinity of the thin film with the increase in anneal temperature. The film annealed at $1,000^{\circ}C$ showed the behavior of Schottky contact and had dislocations in the films. Ohmic contact and TCR of $334.4{\pm}8.2$ (ppm/K) within 4 inch wafer were obtained in the measuring temperature range of 25 to $600^{\circ}C$ for the optimized 200 nm thick-poly Si film with width/length of $20{\mu}m/1,800{\mu}m$. This shows the potential of in-situ P doped LPCVD poly Si as a resistor for pressure sensor in harsh environment applications.

• 한국콘텐츠학회논문지
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• 제13권9호
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• pp.334-343
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• 2013

본 연구는 암환자의 죽음준비와 죽음불안 정도 및 그 관계를 파악하기 위한 서술적 조사연구이다. 연구대상은 암으로 진단 받고 4개 병원에 입원 중인 환자 183명으로 자료수집은 2010년 5월에 이루어졌다. 자료분석은 SPSS WIN 20.0 프로그램을 이용하여 서술통계, independent t-test, one-way ANOVA, Pearson's correlation coefficient를 산출하였다. 대상자의 죽음준비 정도는 4점 만점에 1.99(${\pm}0.69$)점으로 심리적 준비 정도가 가장 높았으며, 죽음불안 정도는 4점 만점에 2.21(${\pm}0.59$)점으로 죽음과정에 대한 불안이 가장 높게 나타났다. 죽음준비와 죽음불안간의 상관관계는 통계적으로 유의하지 않았다. 대상자의 특성에 따른 죽음준비 정도는 연령, 내세관, 암 병기, 투병기간 및 증상 수에서, 죽음불안 정도는 신앙심과 내세관에서 유의한 차이를 보였다. 암환자들은 특히 죽음과정에 대한 불안이 높기 때문에 투병 및 임종과정에서 겪게 되는 불안을 경감시켜 줄 필요가 있으며, 아울러 영적 간호중재가 포함되어야 함을 제안한다.

• 대한간호학회지
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• 제45권6호
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• pp.890-899
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• 2015

Purpose: The purpose of this study was to identify the level of distress and posttraumatic growth in fathers of chronically ill children and also, to identify the relation between characteristics of the fathers and children and their posttraumatic growth and to investigate factors that influence posttraumatic growth. Methods: In this study, 48 fathers who visited a university hospital in Seoul, Korea and who gave written consent completed the questionnaire between September 23 and November 19, 2013. Data were analyzed using Mann-Whitney U test, Kruskal-Wallis test, Pearson correlation coefficient and stepwise multiple regression. Results: The level of distress in fathers of chronically ill children was relatively high and the majority of them were experiencing posttraumatic growth. Models including the variable (deliberate rumination, religiousness, optimism) explained 64.3% (F=26.38, p <.001) of the variance for posttraumatic growth. Deliberate rumination (${\beta}=.59$, p <.001) was the most influential factor. Conclusion: The findings demonstrate that it is essential for nurses to intervene and facilitate continuously so as to promote posttraumatic growth and relieve distress in fathers of chronically ill children. Furthermore, it is also necessary for nurses to find ways to develop ideal interventions to activate deliberate rumination and offer spiritual care and help maintain optimism in these individuals.