• Journal of Hydrogen and New Energy
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• v.35 no.3
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• pp.300-309
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• 2024

Hydrogen utilization in the transportation sector, which relies on fossil fuels, can significantly reduce greenhouse gas by using to hydrogen fuel cell vehicles, and its adoption depends performance of hydrogen refueling station. The present study developed a model to simulate the back-to-back filling process of heavy duty hydrogen fuel cell vehicles at hydrogen refueling stations using a cascade method. And its quantitatively evaluated hydrogen refueling station performance by simulating various mass flow rates and storage tank capacity combinations, analyzing vehicle state of charge (SOC) of vehicles. In the cascade refueling system, the capacity of the high-pressure storage tank was found to have the greatest impact on the reduction of filling time and improvement of efficiency.

• Journal of Home Health Care Nursing
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• v.23 no.1
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• pp.80-89
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• 2016

Purpose: The purpose of this study was to identify the duties and tasks of home visiting geriatric nurses using Development A Curriculum (DACUM) method. Method: The sample consisted of 107 geriatric visiting nurses who worked at community service centers in the Seoul metropolitan area. Job analysis was conducted at a DACUM workshop after that a web-based survey was given to participants to verify the accuracy of the duties and tasks of geriatric visiting nurse. Descriptive statistical analysis was conducted using SPSS 23. Results: A total of 8 duties and 56 tasks were identified as part of the job description of geriatric visiting nurses'. A task verification process was conducted. Overall mean ratings of the task importance were high. 'Recording' was identified as the most frequent duty, and 'Community program planning and operating' was identified as the most difficult duty. Conclusion: Duties and tasks that make up the job of geriatric visiting nurses were identified using the DACUM method. The resulting data will serve as the basis for the design of a curriculum development model for nurses involved in geriatric home visiting education programs, and will also be used to identify training needs and establish a standardized job description for geriatric visiting nurses.

• Korean Journal of Health Education and Promotion
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• v.23 no.3
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• pp.121-134
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• 2006

Objectives: This study was conducted to analyze the general properties of beauticians and to analyze correlation between their experiences of indigestion and relevant factors and thus to provide basic data to prevent obstacles to beautician's health. Methods: A self-administered survey on 257 female beauticians in Daegu from March 15 to May 30, 2005 was conducted. Cross-link analysis was used to examine indigestion in relation to the general properties of beauticians, and correlation analysis was used to determine the level of relationship between indigestion and relevant factors, and multiple regression analysis was used to determine the degree of effects of relevant factors on indigestion. Results: The results can be summarized as follows: 1. As for indigestion by general properties and beauty-related properties, there were significant differences in gender(p<0.01), age(p<0.05) and marriage status(p<0.05) among general properties and there were significant differences in the number of holiday(p<0.05), beauty culture career(p<0.01), and the degree of satisfaction on duty(p<0.001) among beauty-related properties. As for indigestion by eating habit and health-related properties, there were significant differences in the degrees of regular eating(p<0.001) and regular living habit(p<0.001), and eating speed(p<0.01). 2. Factors relevant to the eating habit showing significant correlation with indigestion were regular eating habit, taking well-balanced nutrition, and taking salty food. Among them, the regular eating habit was shown to be the most relevant with the correlation coefficient of -0.253(p<0.01). The general and beauty-related factors showing significant correlation with indigestion were beauty culture career, number of holiday, and regular living habit. And regular living habit was shown to be the most relevant with the correlation coefficient of -0.260(p<0.001). 3. Results from the regression analysis showed that relevant factors having significant effects on indigestion were gender, beauty culture career, satisfaction on duty, eating speed, regular eating habit and regular living habit. And satisfaction on duty was found to have the greatest effect on indigestion. Conclusions: The findings of this study could be effectively used to develop a practical management strategy to prevent $beauticia{\acute{n}}s$ indigestion, and to promote $beauticia{\acute{n}}s$ health, and ultimately to improve the $beauticia{\acute{n}}s$ quality of life.

• Journal of vocational education research
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• v.33 no.3
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• pp.145-167
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• 2014

The purpose of this research is to prepare the measures for evaluating the job of horse-riding instructor and improvement related to it and for distributing horse-riding industry effectively. Forsuch, we tried to analyze job of horse-riding instructor. Inparticular, we have developed DACUM chart of horse-riding instructor through DACUM method and experts related to it. As result, we found out eight duties and hundreds of job and arranged seven duty areas in total and eighty-two executed works. In addition, as experts said, the horse-riding instructor is the one who 'instructs people learning horse-riding in horse-riding facility and manages horses, horse-riding equipment and man-power.' Such results provide the procedure of horse-riding instructor cultivation which has been presently underway with many viewpoints. Especially, there are three educational processes and subject materials related to horse-riding instructor's examination(Hipologia, Horse-treatment technique, Horse Health management). However, as result of analysis on duty, we found out that racecourse management and horse-riding education theory has been needed to be added and complemented as well. In addition, the work and duty of analysis can be used to be made use up of as work profile and specification and such data can be also made use of as standard of training and submission. Through this study there should be a necessary work to distinguish between re-drafting and role of duty in its own right related to certification of horse-riding instructor in future and it would be necessary to develop study that is able to connect them all to certificate. What is more, there should be work and measure required for rethinking of utility of certification.

• The Journal of Korean Institute of Electromagnetic Engineering and Science
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• v.21 no.6
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• pp.601-609
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• 2010

This paper measured EMF strength of the duty measurement radio station(77 station) and the non-duty measurement radio station(41 station) of mobile communication base station in Jeonbuk region. As the result of measurement, it generally reveals that EMF is highly low level compare to the human protection guideline. And It is regarded as level that the national people who live close to the mobile communication base station don't have to worry about electromagnetic wave. This paper provides comparative analyses categorized by the duty measurement station and the non-duty measurement station. The results reveals that the average value and the maximum value of the non-duty measurement station preferably was higher than all the duty measurement station. It is thought that the EMF exposure strength of the national people is caused by approach of station antenna rather than antenna power. Consequently this paper suggests that standard of the antenna power(exceed 30 W), standard of antenna height(exceed 10 m) specified by Radio Regulation Act enforcement ordinance, legal basis for mobile communication base station have to be changed.

• Korean Journal of Community Nutrition
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• v.15 no.1
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• pp.124-136
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• 2010

The purposes of this study were to investigate importance level and performance frequency of the dietitians' duties and task elements, to examine the actual condition of education and need for education, to analyze the interrelation between their tasks and education, and to provide the direction of education for the contracted Business & Industry (B & I) foodservice dietitians. The task elements of receiving, ordering, HACCP management and directing serving process were done almost every day. In terms of the importance of tasks, food sanitation management, personnel sanitation management, receiving and ordering were high. Meanwhile, the computerization of their works was being carried out on the whole, showing a higher frequency in all the details of procurement management and accounting management, as well as task elements such as menu planning, leftover and food waste management, HACCP management and human resource management. In the past three years, HACCP management, cost management, planning work schedule and allotting a task, general business and sale bond management were increased most and rapidly. For the actual condition of education, dietitians got more education for the duty of sanitation, safe and facility/utility management than any other duty, while they did less education of procurement management and office management than others. Meanwhile, the education for sanitation, safe and facility/utility management and accounting management were very much required. For the relationships of frequency of duty and the necessity of education, seven task elements including food sanitation management were correlated positively. Eighteen tasks besides menu planning had a significant positive correlation between the importance of duties and the necessity of education.

• Journal of Korean Ophthalmic Optics Society
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• v.14 no.4
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• pp.27-31
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• 2009

Purpose: The purpose of this study was to document the importance of work capability and the educational needs for optometric duty. Methods: Questionnaires were distributed to 813 optometrists and 89 full-time faculties on nation wide in July, 2008. Results: Statistical analysis showed that high mean of 3.53, maximum of 4, for the importance of work capability, and 3.46 for the educational needs as for the total optometric duty. Especially, optometric dispensing was the highest on the importance of work capability and the educational needs, where as medical ethics and optometric jurisprudence and business management was the lowest. Conclusions: Both optometrists and full-time faculties agreed to the importance of work capability and the educational needs, and therefore it should be reflected in optometric education program.

• Transactions of the Korean Society of Automotive Engineers
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• v.19 no.3
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• pp.73-82
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• 2011

Most of countries start to restrict the emission gases of vehicles especially CO2 because of the global warming. Many vehicle companies including Toyota have launched various HEVs to satisfy the restriction laws and to improve the vehicle's efficiency. However, development for heavy-duty hybrid system is not plentiful rather than the passenger car. In this study, we choose the optimal size of engine, motor and battery for heavy-duty hybrid systems using dynamic programming. Also we analyze the correlation of the system's cost and efficiency because the added cost of vehicle to make the hybrid system is very important factor for the manufacturing companies. Finally, this study suggests a method to choose the appropriate system components size considering its performance and the cost. With this method, it is possible to select the component size for various systems.

• The Journal of the Korea Contents Association
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• v.9 no.9
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• pp.325-334
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• 2009

The object of this study is to examine the relations between leisure activity and duty stress and separation intention in private guards. The subject of this study is set up the private guards who are working at private guard company in a capital sphere. This study applyed the way of judgement abstraction and abstracted the total of 360 persons. However, the number used in the final analysis is 333 persons. The last conclusion in this study is as follows. Firstly, the relation between duty stress and separation intention has a matual effect meaningfully. Secondly, the physical stress hasn't an effect on the term of leisure activity, and separation intention. affects meaningfully the physical stress. Thirdly, the relation beween leisure activity and separation intention exerts a meaningful influence mutually in all sphere. Duty stress is a important parameter between leisure activity and separation intention.

• Korean Journal of Social Welfare Studies
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• no.39
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• pp.147-165
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• 2008

This Study analysis two features of social citizenship in the period of rights revolution. Discousive arguments are derived from different reinterpretations of social citizenship of Marshall. Some insist that main idea of welfare state is rights of social citizenship and the other insist that social rights is realized after doing duty. Especially the latter emphasis work obligation in which individual responsibility and duty, these discussion underlie wokrfare policy. This reserch examine two contrary discourses based on Marshall's theory, and make a close inquiry into correct interpretation about Marshall. New rights, the Conservative party and New Labour seek for ground on Marshall's citizenship theory, but these are distortion on it. Marshall insisted that citizenship constituted rights and duties but he claimed that discharge of a duty isn't precondition of the exercise of the right.