• Journal of the Korean Society of Clothing and Textiles
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• v.26 no.1
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• pp.74-82
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• 2002

The present study is aimed to investigate the effect of the safety hat on the balance of body temperature by observation of the physiological response under hot working environment. The experiment was carried out in a climate chamber of 3$0^{\circ}C$, 50%RH for 70 minutes. To compare the two kinds of safety hat, 5 healthy male subjects worn safety hat without hole (called 'without hole') or safety hat with hole (called 'with hole') according to a randomized cross-over design. The main results of this study are as fellows: Rectal temperature and heart rate were significantly lower level in 'with hole'than in 'without hole'. The mean skin temperature was significantly higher in 'without hole'than in 'with hole'. Blood pressure were significantly low in 'with hole'. Sweat rate which was measured by weight loss before and after experiment was higher in 'without hole'. In subjective ratings, subjects replied more hot, more uncomfortable and more wet, they felt more fatigue in condition of 'without hole'. Work ability which was measured by a grip strength dynamometer was higher in 'with hole'. Safety hat which can be used for safety of the brain in work place is meaningful device of behavioral thermoregulatory response under the hot working environment. The safety hat which is designed for proper ventilation and hygiene can maintain the homeostasis of body temperature by releasing body temperature efficiently.

• Progress in Medical Physics
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• v.23 no.2
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• pp.81-90
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• 2012

The effect of setup uncertainties on CTV dose and the correlation between setup uncertainties and setup margin were evaluated by Monte Carlo based numerical simulation. Patient specific information of IMRT treatment plan for rectal cancer designed on the VARIAN Eclipse planning system was utilized for the Monte Carlo simulation program including the planned dose distribution and tumor volume information of a rectal cancer patient. The simulation program was developed for the purpose of the study on Linux environment using open source packages, GNU C++ and ROOT data analysis framework. All misalignments of patient setup were assumed to follow the central limit theorem. Thus systematic and random errors were generated according to the gaussian statistics with a given standard deviation as simulation input parameter. After the setup error simulations, the change of dose in CTV volume was analyzed with the simulation result. In order to verify the conventional margin recipe, the correlation between setup error and setup margin was compared with the margin formula developed on three dimensional conformal radiation therapy. The simulation was performed total 2,000 times for each simulation input of systematic and random errors independently. The size of standard deviation for generating patient setup errors was changed from 1 mm to 10 mm with 1 mm step. In case for the systematic error the minimum dose on CTV $D_{min}^{stat{\cdot}}$ was decreased from 100.4 to 72.50% and the mean dose $\bar{D}_{syst{\cdot}}$ was decreased from 100.45% to 97.88%. However the standard deviation of dose distribution in CTV volume was increased from 0.02% to 3.33%. The effect of random error gave the same result of a reduction of mean and minimum dose to CTV volume. It was found that the minimum dose on CTV volume $D_{min}^{rand{\cdot}}$ was reduced from 100.45% to 94.80% and the mean dose to CTV $\bar{D}_{rand{\cdot}}$ was decreased from 100.46% to 97.87%. Like systematic error, the standard deviation of CTV dose ${\Delta}D_{rand}$ was increased from 0.01% to 0.63%. After calculating a size of margin for each systematic and random error the "population ratio" was introduced and applied to verify margin recipe. It was found that the conventional margin formula satisfy margin object on IMRT treatment for rectal cancer. It is considered that the developed Monte-carlo based simulation program might be useful to study for patient setup error and dose coverage in CTV volume due to variations of margin size and setup error.

• Asia-Pacific Journal of Business Venturing and Entrepreneurship
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• v.11 no.2
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• pp.221-232
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• 2016

The impact of the recent small business start-up competition in the market, has become overheated. It is effected by early retirement of a generation of youth employment. This study is a study on the impact of SEMAS(Small Enterprise and Market Service) system operating of the funding system, education support programs, and consulting support system on the business performance of small business owners. It has surveyed 272 business owners, in Gyeongsangnam-province. The study includes specific support system for usage frequency and satisfaction and conducted from January 2013 to September 2015. In addition, it analyzes characteristic that motivation, business model, item, owner's experience, sales and demographic by small business owner. Analysis results, the management performance of small business that uses financial support system and consulting support system is shown to be high. But education support system is the opposite effect. As a result, the management performance is related to industry experience. Therefore education support system need to be reorganized to the support depends on the development stage. This study was conducted to help small business owners entered the start-up market and a decision-making person with a policy decision.

• The Journal of Korean society of community based occupational therapy
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• v.10 no.1
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• pp.1-15
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• 2020

Objective : The purpose of this study is to investigate the factors affecting occupational therapist's job stress through meta-analysis. Methods : In order to achieve the purpose of the study, 15 studies that examined job stress of occupational therapists were selected for analysis. The general characteristics of individual papers and the magnitude of the effect of related variables on job stress were calculated. The effect size of related variables on job stress and sub-factors (Fisher z) were calculated. Results : The results were found that the effect size on job stress was not significant in the variables of education level, salary and age. The largest effect size was found to be turnover intention (ES=1.161). There was no significant effect size in sub-factors of interpersonal conflict, organization system and insufficient job control. There was a significant effects in physical environment, lack of reward, job insecurity, job demand and occupational climate. Conclusion : The results of this study were suggested that an approach depending on sub-factors is needed to reduce job stress of occupational therapists. Satisfaction, burnout, and self-efficacy, which are psychological factors, are considered to be needed a program for psychological empowerment in order to reduce the job stress of the occupational therapist with a medium effect size according to individual sub-factors.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.12 no.6
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• pp.2598-2606
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• 2011

This study investigated the relationship between job stress and psychosocial stress among clerical public officers in Daejeon City. The self-administered questionnaire survey was administered to 386, during the period between June 1, 2010 and July 31, 2010. As a results, In terms of various levels of psychosocial stresses, 8.8% of the subjects were healthy group, 64.5% were potential stress group, and 26.7% were high risk stress group. On job specifications, the high risk stress group were significantly higher those with higher level of job demand, lower job autonomy and lower colleagues support than their respective counterparts. The level of psychosocial stress was positively correlated with job demand and negatively correlated with job autonomy and social support. Multiple regression analysis revealed that the factors of influence on psychosocial stresses included subjective status of health, satisfaction in work, smoking, leisure activities, past history of visits to medical clinics, social support from colleagues.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.17 no.7
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• pp.543-554
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• 2016

This study examined the fatigue and its association with job stress among male workers engaged in small-scale manufacturing industries. The study subjects were 553 male workers under 50 members of manufacturing industries. The study survey was a structured questionnaire of the Korean Occupational Stress Scale (KOSS) and Multidimensional Fatigue Scale (MFS) during April, 2015. The data were analyzed using the SPSS ver 21.0 program. The results showed that the high risk fatigue group was significantly higher in the high risk group of job stress than in the normal group of job stress. Fatigue was positively correlated with job stress. The odds ratio of the high risk fatigue group were increased significantly in the high risk group of job stress than in the normal group of job stress. The factors of influence with explanatory powers of 27.7% on fatigue included age, marital status, educational level, subject health status, sleeping time, drinking coffee, job tenure, shift work, visiting out-patient department, sense of satisfaction in job life, and job stress. Fatigue was associated with the sociodemographic characteristics, health behavior related characteristics, job-related characteristics, and job stress.

• Korean Business Review
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• v.19 no.1
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• pp.223-240
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• 2006

The purpose of this study is to review the current state of the transformational leadership and LMX approach to the study of leadership. Leadership research has witnessed a shift from traditional transactional models to a new genre of theories of transformational and charismatic leadership and LMX. Transformational leadership theories offer the promise of extraordinary individual and organizational outcomes. Leaders motivate followers to perform beyond expected levels by activating higher order needs, fostering a climate of trust, and inducing them to transcend their self-interest for the organization's sake. Numerous investigations point of the robustness of the effects of such leadership on individual and organizational outcomes such as job satisfaction, organizational commitment, and performance. LMX theory suggests that leaders do not use the same style in dealing with all subordinates, but rather develop a different type of relationship or exchange with each subordinate. These relationships range from those that are based strictly on employment contracts to those that are characterized by mutual trust, respect, liking, and reciprocal influence. LMX has been positively related to job satisfaction, productivity, and career progress of managers and negatively related to turnover and employee grievances. In conclusions, effective leaders link achievement of organizational goals to follower fulfillment of self-development goals, with the former advancing the latter.

• Journal of Navigation and Port Research
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• v.42 no.4
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• pp.299-310
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• 2018

This study examined the significance of the crew's professional consciousness and sought to clarify the differences in the professional consciousness of crew by considering biographical characteristics of the crew and onboard working situations, which were expected to influence the professional consciousness of crew. The empirical analysis showed the crew's individual characteristics such as age, marital status, position in ship organization and nationality significantly influenced professional consciousness. The comparison in the differences of professional consciousness level among crew's nationalities showed that the professional consciousness of Filipino crew was the highest, and in the descending order of Indonesia, Myanmar, Chinese, and South Korea. The analysis results of other variables of on-board working characteristics showed that as crew's satisfaction of welfare increased, crew's professional consciousness increased, whereas the feeling of isolation from home and society had a statistically significant negative (-) impact on crew's professional consciousness. Furthermore, the analysis of multinational crew manning characteristics stated that cross-cultural acceptance did not have a statistically significant impact on the crew's professional consciousness, while cross-cultural adaptability had a statistically significant impact. This study emphasize the importance of the crew's professional consciousness and suggest how to enhance it, which allows crew to continue their career with the charm and pride of their profession.

• Asia-Pacific Journal of Business Venturing and Entrepreneurship
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• v.7 no.4
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• pp.169-178
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• 2012

The aim of this study is to look into the influential factors on the care-workers-perceived job stress level according as the elderly-perceived satisfaction varies depending on care workers' organizational characteristic & attitudes toward work, and there's necessity of reducing their job stress. Hereupon, this study, targeting the care workers at domiciliary visit care centers in Seoul district, analyzed the influential factors of organizational factors consisting of the sub-factors, such as job autonomy, compensation, education and development, members' interrelationship, etc. on the perception level of job stress. As a result of analysis, it was found that the shorter their working hours, the more their salary, the more guaranteed their job autonomy, and the better their interrelationship is, the care workers at a domiciliary visit care center had a positive perception of job stress. Accordingly, the operators of domiciliary visit care centers are requested to have a lot more concerns for diverse forms of improvements which can not only improve care workers' working conditions, such as daily working hours and a pay level but also promote a sense of fellowship between members; in addition, it is hoped that the operators should improve the organizational environment so that care workers can freely carry out their assigned business with a sense of responsibility rather than relying on control and regulation.

• Industry Promotion Research
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• v.2 no.1
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• pp.39-44
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• 2017

The purpose of this study is to analyze the effect of the Naeil Chaeum deduction system on job satisfaction. The results of the study are summarized as follows. A total of 159 small to medium-sized enterprise workers participated in the deduction for Naeil Chaeum. The data were analyzed using SPSS Statistics 20, which included frequency analysis, factor analysis, reliability analysis, correlation analysis, regression analysis, and post analysis. First, the suitability of the method of the Naeil Chaeum deduction system has the highest positive effect on the job satisfaction. Second, the correlation of job satisfaction after filling in Naeil Chaeum deductions showed that fitness (p <.01, ${\beta}=.307$) and efficiency (p <.01, ${\beta}=.296$) had a significant effect on job satisfaction. Third, the analysis of the difference of job satisfaction according to the academic ability of the workers who were enrolled in Naeil Chaeum deduction system was analyzed that professional college graduates (2.08) were higher than job college graduates (1.99).The purpose of this study is to analyze the impact of the Fill - Down System on the job satisfaction by analyzing the importance of quality of life, job satisfaction, and muscle strength, analyzing the difference according to the demographic characteristics of the workers, And helping to stabilize the work life, and to verify the effectiveness of the study.