• Communications for Statistical Applications and Methods
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• v.16 no.4
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• pp.557-572
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• 2009

This article examines the financial soundness of the government employee pension system(GEPS). We use a model that simplifies the existing GEPS considering survival probability distribution of the life of employees. Two approaches were selected for the research: One is the expected net value of pension for an individual employee and the other is the default probability of the system from Monte-carlo simulation. The outcome reveals following three possibilities. First of all, the individual expected net value presents unfairness between the retiree's premium and the benefit he/she receives. Secondly, the Monte-carlo simulation suggests that the default is highly likely to happen in less than 30 years. Thirdly, the governmental reserve and subsidy for GEPS should be required to a certain degree in order to alleviate the probability of default less than 5 percent for the next 30 years.

• Journal of Information Technology Applications and Management
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• v.24 no.4
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• pp.25-39
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• 2017

This research conducted empirical and comparative study following interview concerning the relationship of acceptance attitudes and expected effects of the teleworking between Korean and Canada organizations. Independent variable was acceptance attitude, and the expected effect as dependent variable. Totally, 201 responded questionnaires (Korea : 118, Canada : 83) were analyzed for multiple regression and mean difference between groups. On January 1, 2015, Canada had agreed FTA (free trade agreement) with Korea. Therefore, many organizations can have opportunities for sharing hands in social infrastructures and business area. As a result, the research found out that teleworking can positively improve employee's quality of life, efficiency of works. Moreover, respondents informed us that it may give us national and social cost saving. The BYOD (bring your own device) will be helpful to make employees do more active communication. This comparative research expects that two countries have some insights to cooperate in smart work or teleworking. In addition, several Korean companies can have chances to export IT technologies to Canada market.

• Asia-Pacific Journal of Business Venturing and Entrepreneurship
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• v.9 no.3
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• pp.97-105
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• 2014

The purpose of this study is to identify the expected effects of LOHAS certification on business management performance. LOHAS certification which Korean Standards Association adopts and operates, contributes to improve the quality of healthy and happy life through the spread of eco-friendly and social responsible products and supports company's continuous growth and development through product value and image enhancement. The object of certification is divided into products and non products which is like services and space. In this study, empirical method using Questionnaire survey is used to look through the expected effect of LOHAS certification on business management performance focused on the manufacturing companies which acquired LOHAS certification.

• Journal of Electrochemical Science and Technology
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• v.13 no.2
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• pp.208-212
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• 2022

In this paper, we report the effects of temperature on the deterioration of graphite-based negative electrodes during the longterm cycling of lithium-ion batteries (LIBs). After cycling 75 Ah pouch-type LIB full cells at temperatures of 45℃ (45-Cell) and 25℃ (25-Cell) until their end of life, we expected to observe changes in the negative electrode according to the temperature. The thickness of the negative electrode of the cell was greater after cycling; that of the electrode of 45-Cell (144 ㎛) was greater than that of the electrode of 25-Cell (109 ㎛). Cross-sectional scanning electron microscopy analysis confirmed that by-products caused this increase in the thickness of the negative electrode. The by-products that formed on the surface of the negative electrode during cycling increased the surface resistance and decreased the electrical conductivity. Voltage profiles showed that the negative electrode of 25-Cell exhibited an 84.7% retention of the initial capacity, whereas that of 45-Cell showed only a 70.3% retention. The results of this study are expected to be relevant to future analyses of the deterioration characteristics of the negative electrode and battery deterioration mechanisms, and are also expected to provide basic data for advanced battery design.

• Journal of Korean society of Dental Hygiene
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• v.14 no.5
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• pp.659-665
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• 2014

Objectives : This study aimed to determine the effects of stress coping type on self-esteem and satisfaction with life in dental hygiene students. In particular, an attempt is made to determine the effects of sub-factors of stress coping type on self-esteem and satisfaction with life, get a better understanding of self-esteem and satisfaction with life for dental hygiene students, and provide basic data in developing a program that can identify, prevent, and control the problems with stress for dental hygiene students. Methods : This is descriptive correlation research to determine the relations between self-esteem and stress coping type in dental hygiene students. 212 dental hygiene students at colleges in Ulsan Metropolitan City were asked to complete a self-administered questionnaire from June 10 to 20, 2013; then, 209 copies were used in analysis, with the exception of 3 copies which were excluded from recording. Results : Self-esteem and satisfaction with life were positively affected by active stress coping but were negatively affected by passive stress coping. As for such sub-factors of stress coping type as problem-focused coping, pursuit of social support, emotional relief coping, and hopeful thinking, the sub-factors of active coping type also positively affected self-esteem and satisfaction with life. Self-esteem interacted with the sub-factors of stress coping type and satisfaction with life. Conclusions : Since stress coping type was found to be a factor affecting self-esteem and satisfaction with life for students, the results of this study are expected to be used as basic data in developing a program that can help them cope actively with stress.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.17 no.7
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• pp.77-85
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• 2016

The present study evaluated the SNS addiction tendency, mental health, and the student's adjustment to college life to identify the correlations between each of these independent variables on the dependent variable, the adjustment to university life of undergraduate students. Data were collected from 197 subjects in K university of G city, using a self-administered questionnaire. Mental health was negatively correlated with the adaptation to university life. A significant influence of gender and mental health on the adjustment to college life was found in this sample. These findings are expected contribute to understanding and improving the adjustment to college life of undergraduate students. Based on these findings, it will be necessary to improve mental health and multidisciplinary interventions will be needed to support the adjustment to college life in undergraduate students. In addition, these findings would contribute to the development of programs for student's adaptation to college life.

• Journal of the Korea Institute of Construction Safety
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• v.2 no.1
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• pp.1-8
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• 2019

Recently, as development of building construction technology, height of building continues increase. But, there is no clear ground of service life of tower crane. So, accident in the tower crane continues to occur. In addition to Korea, there is no clear ground for the serive life of tower cranes overseas. For this reason, this study aims to establish the maximum service life of tower crane. Accidents in tower cranes continues to increase, and the cause of the accident is that there are no ground of limitations for service life of tower cranes. Therefore, in this study, the maximum service life of the tower crane was calculated by using the information of the hoisting case of the tower crane to limit the model year of the tower crane. The results of this study are as follows; As the number and time of the hoisting work increases, the maximum service life of the tower crane decreases. In addition, since this study refers to European standards, it is necessary to establish standards for domestic situations. Result of this study, we expect decrease accidents in tower crane. And it is expected that the service life of tower crane will be more clear if this study is developed.

• Journal of The Korean Society of Integrative Medicine
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• v.9 no.4
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• pp.59-69
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• 2021

Purpose: The purpose of this study was to evaluate the effects of client-centered art and craft activities on depression and quality of life in stroke clients. Through this, we aim to find a way to reduce depression and improve the quality of life in stroke clients. Methods: Clients diagnosed with stroke were selected as participants for the study. Participants in the experimental group (n=13) and control group (n=14) received general occupational therapy. Clients in the experimental group participated in client-centered art and craft activities, whereas clients in the control group participated in general art and craft activities for 8 weeks. Beck Depression Inventory(BDI) and Stroke Specific Quality of Life(SS-QOL) were used to evaluate the depression and quality of life of the clients before and after the intervention. Results: The experimental group and control group presented significant statistical difference in depression before and after intervention (p<.01; p<.05). The experimental group showed a greater decrease in depression (p<.05) than the control group. Additionally, the experimental and control group displayed significant statistical difference in quality of life (p<.01) before and after intervention. The experimental group showed a more statistically significant improvement in quality of life (p<.01) than the control group. Conclusion: These results demonstrate the significance of client-centered art and craft activities in reducing depression and improving quality of life in clients with stroke. Therefore, it is expected to be useful in clinical settings. Occupational therapy should be provided based on the decision of the clients.

• Journal of Families and Better Life
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• v.27 no.6
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• pp.83-94
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• 2009

This study examined the expectations and attitudes of urban Korean consumers with respect to the Korea-USA Free Trade Agreement (FTA), which was drafted on April, 2007. The data were collected through online surveys in which 527 adults answered structured questionnaires. The results showed that the number of consumers who favored the Korea-U.S.A. FTA was almost twice the number of those who objected to it. Most of the consumers surveyed expected not only positive effects but also negative ones from the FTA, and the more consumers expected positive effects from the FTA, the more they tended to have positive attitudes toward the trade agreement. The effects of consumers' individual characteristics on their expectations and attitudes were also analyzed in this experiment.

• 한국방재학회:학술대회논문집
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• 2007.02a
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• pp.349-352
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• 2007

Asphalt overlay resurfacing techniques have been widely utilized in maintaining asphalt concrete in Korea, causing severe traffic congestions while being in construction and difference in level due to the repeated overlay. Besides on these technical difficulties, there have been financial disadvantages associated with technique, mainly because overlay method has been executed for pavements with intact foundations, which is contrary to the norm. This study is aiming to increase the expected life length of the asphalt pavement up to the endurance period, to raise the efficiency of the pavement by maximizing the social benefit and to enhance public character of the street through combining ceramics with epoxy resins, which has advantages in compatibility with the existing pavement materials, durability to abrasion and endurance. It has been expected that the adoption of new method and pavement materials to the actual work sites will develop the performance of the pavements, and to lengthen the durability of the existing materials. The other advantages of the 'thin surfacing' method could be the improved adhesiveness, waterproof, corrosion-proof and bending strength.