• Environmental and Resource Economics Review
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• v.26 no.3
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• pp.451-472
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• 2017

An OPEC production announcement is a major source of supply disruption that has a significant impact on the international crude oil market. In this study, the effects of OPEC's announcements are analyzed using event study methodology. Considering the oil price volatility and structural changes in the oil price, we divide the entire period into three periods and analyze the impact of OPEC's production quota announcements, including 'cut', 'hike', and 'maintain'. As a result of the analysis, we observe that the degree and direction of abnormal returns differ according to the announcements in each period. In addition, by subdividing oil price surge and plunge period into two sections, we analyze the effect of OPEC's 'maintain' announcements. During the oil price plunge period, the amount of abnormal returns was significant. This study provides policy implications for oil trading strategies and for the impact of OPEC announcements during periods of oil price fluctuation.

• The Journal of the Korea Contents Association
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• v.18 no.1
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• pp.561-572
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• 2018

Female tollgate workers are known to be the most highly exposed to job stress in the service industry. However, there have been few studies on female tollgate workers. This study was thus performed to verify the mediator effect of work-family conflicts in the relationship between job stress and turnover intention of female tollgate workers. A survey was carried out in May, 2016, and the final data were obtained from 183 female tollgate workers by quota sampling. The major result was that their job stress significantly influenced on turnover intention, and work-family conflicts between the two variables were partially mediated. On the basis of the outcomes, first, further studies are needed to develop customized supporting programs for the female tollgate workers; second, internal efforts, such as psychological and social support programs such as Employee Assistance Programs (EAPs), should be launched for the workers at the enterprise level; third, national attention must be paid to improve the work environments of female tollgate workers.

• Journal of agricultural medicine and community health
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• v.23 no.1
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• pp.79-89
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• 1998

This study was to evaluate the performance status and associated factors with the health promoting activities. Two hundred three old aged over 65 years old sampled by quota sampling among 660 old aged in a rural area, Dae-Ma Myun, Young-Kwang Gun, Chollanam Do. The questionnaire survey was performed from June 1st to August 31st in 1997. The major findings were as follows ; 1. The performance rate of health promoting activities were higher in female, dwellers at community health practitioner post area, and old aged believes in a religion and high educated old aged. 2. A multiple regression analysis showed that physical health promoting activity was related to psychiatric wellbeing status, the disability of daily living, residental area and family numbers(P<0.05). 3. The disability of daily living and psychiatric wellbeing status were related to mental health promoting activities by a multiple regression analysis(P<0.05). In conclusion, psychiatric wellbeing status, the disability of daily living, the disability of daily living and residental area were associated the performance of health promoting activities for old aged in a rural area.

• Journal of the East Asian Society of Dietary Life
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• v.7 no.2
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• pp.211-220
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• 1997

This study was investigated about preparation of ice at home and developing points which met consumer's demand that was focused on auto icemaker. According to purposive quota sampling method, residences in Seoul and Kyunggi-do area were selected and interviewed by trained interviewer at August 1995. The results were as follows: 66.3% of respondent usually prepared ice in ice-making container of refrigerator and used when they needed. 85% of them used ice in summer and seldomly used in other seasons. Boiling water with barley was major drinking water(45.6%), and broiled or purified tap water was used to make ice(38.6%) commonly. Numbers of ice-making container were two(66.0%). Above 50% of respondents replied that they felt off-flavor in ice usually. After felt off-flavor, 54.7% of respondent threw away the ice, some of them used off-flavored ice after treatment to washing with water. 64.9% of respondents thought that the origins of off-flavor was the flavor of refrigerator itself. The consumer's expectation of developing points were as follows. The most priority of developing points was to make ice quickly, the next was to develop auto ice maker and ice storage container, to make different size of ice. Less expected points were to make more clear ice and large volume of ice in one time. The recognition about auto ice maker was slightly low(35% of respondents), but 67% of them wanted to develop auto ice maker.

• Journal of the Korean housing association
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• v.20 no.6
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• pp.1-10
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• 2009

Rapid social change affects residential environments and this in turn creates new stimuli to which people have to adapt. These stimuli have been seen to increase stress levels. Therefore, dwellers in these environments try to reduce stress through various methods. The purpose of this paper is to: 1) identify the general trends of coping styles about residential environmental stress, 2) analyze the differences in socio-demographic characteristics and how the physical characteristics of buildings affect stress, find out how personal backgrounds affect stress levels and the ability to get rid of environmental-related stress. The subjects in this study consisted of people living in multi-family housing in Gwangju. The city is divided into 5 districts and used quota sampling. 324 housewives were surveyed from the households by self-administered questionnaires. The survey was conducted in December, 2006, after the questionnaire was revised based on the results of preliminary survey. After all the questionnaires were collected, the data was coded and analyzed using the SPSS 12.0 program. This study confirmed that the manner in which those in multi-family housing coped with stress. Especially, we need a policy which seriously considers residents who are of low social-economic standing. As well as being exposed to residential environmental stress, they also have no means to deal with it. The age of a building had a strong impact on coping styles about residential environmental stress. We have to make special studies about the adaptive reuse of buildings for the reduction of residential environmental stress and to greatly improve coping styles. In conclusion, it emphasized the importance of education, information, and economic aid. Reasonable housing management would surely lead to a rise in residential satisfaction and the promotion of residential welfare.

• Korea Journal of Hospital Management
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• v.7 no.1
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• pp.121-130
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• 2002

As a hospital deals with people in their particular states, namely patients, computerization and automation in organization systems are very limited. Even though state-of-the-art medical systems such as the OCS, the HIS, the EMR, and the FACS are facilitating the computerization and informatization processes, they are for convenience and effectiveness. Ultimately, however, we should depend on specialists including doctors, nurses, pharmacists, and medical engineers. Therefore, a hospital is a representative labor-intensive body. Like other similar organizations, hospitals require a lot of manpower. But they are quite different in that hospital people hold variety and complexity in their qualifications and licenses. In personnel management, a hospital is twice controlled owing to the special characteristics that human life is at stake. First, the quota of medical manpower should be obeyed lest the quality of medical services should be lowered, and their roles and interrelations are even regulated. Second, in spite of the peculiarity of hospitals, the duties of obligatory employment and social insurances should not be neglected like other companies. In order that each hospital can preserve the proper level of medical services, securing the appropriate level of medical personnel has to be regulated. However, as the personnel cost is one of the important indices of hospital management, too much regulation in manpower supply can lead to poor hospital management and, in the end, the drop of the quality of medical services. In sum, as far as hospital personnel is concerned, some autonomy ought to be given to each hospital so that it can control the quality of hospital services. In addition to this minimum regulation of personnel, certain incentive and reward systems like the graded nursing system need to be prepared.

• Korean Medical Education Review
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• v.19 no.3
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• pp.134-137
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• 2017

The main points of issue with the former premedical curriculum of Seoul National University College of Medicine (SNUCM) were the absence of educational objectives, decline in student motivation caused by uniform education, students' lack of a sense of belonging, and lack of humanistic education. In accordance with these issues, there were five aspects considered for the improvement of the premedical curriculum: reform based on the newly established educational objectives that corresponds with the 6-year medical school curriculum as a whole, expansion of elective courses and the development of personalized curriculum for the improvement of students' learning motives, expansion of social sciences and humanities curriculum for the development of students' capabilities as good doctors, active participation of medical professors in premedical education, and expansion of informal education and the student support program. According to the assessment done after the implementation of the reformed curriculum, premedical students were gratified with its establishment and management of multifarious liberal arts and major subjects. In preparation of the more rigorous entrance quota of the premedical school at SNUCM, there is ongoing reform of required major subjects and establishment of new subjects in the premedical curriculum in pursuit of unity with the 6-year medical curriculum. Moreover, there is ongoing development of an e-portfolio system for the association of premedical and medical education, integration of formal and informal curriculum, and reinforcement of student observation and formative evaluation. Further discussion on the assessment and betterment of premedical curriculum is needed.

• Journal of Fisheries and Marine Sciences Education
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• v.27 no.3
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• pp.791-803
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• 2015

This study aims to examine the influence of tennis instructors' coaching behaviors on the satisfaction with lessons and preference for instructors. In order to achieve this study objective, by using the quota sampling out of nonprobability sampling for tennis club members who are now(2015) actively involved in tennis courts located in Daejeon Metropolitan City and Chungcheongnam-do, and also receiving tennis lesson for more than six months or used to take lessons before, the 325 effective samples were used for data analysis. Using the SPSS Ver. 21.0 Window Program, the collected data went through frequency analysis, exploratory factor analysis, reliability analysis, t-test, one-way ANOVA, correlation analysis and multiple regression analysis, and the results are like below. Regarding differences of coaching behaviors depending on sex, first, there were significant differences in the factors like explanatory instruction, positive feedback and negative feedback. In case of differences in accordance with age, every factor showed significant differences. In regard of differences depending on academic background, there were differences in the factor of negative feedback while the factor of positive feedback showed differences in accordance with the experience of lesson. In case of differences depending on the level of athletic performance, there were statistically significant differences in the factors like explanatory instruction, questioning instruction and negative feedback. Second, the positive feedback, one of the sub-factors of coaching behaviors had positive influence on satisfaction with lesson while the explanatory instruction, one of the sub-factors of coaching behaviors had positive influence on preference for instructors. Lastly, the satisfaction with lesson had positive influence on preference for instructors.

• Korean Journal of Agricultural Science
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• v.47 no.2
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• pp.337-347
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• 2020

Since 2012, despite the fact that tariff rate quotas (TRQ) in the form of dried peppers has not been imported, the imports of pepper-related items such as low- tariff frozen peppers (27%) and other sauces (45%) have increased, there has been a problem in the domestic pepper industry, in which the domestic self-sufficiency rate has declined. The purpose of this study was to find out whether the operation of chili pepper TRQ has the effect of suppressing the imports of pepper-related items from China. We analyzed the import substitution effect (import suppression effect) through causal analysis of the imports of red pepper TRQ, frozen peppers, and other sauces using the structural equation model analysis method. As a result of the hypothetical scenario analysis, when the government imports and releases 7,185 tons of pepper TRQ in 2019/20 (scenario), private imports were estimated to decrease by only 3,060 tons. In other words, the import substitution effect between imported items was estimated to decrease about 2,079 tons of private dried peppers, and about 981 tons of imported pepper-related items. There was an effect of suppressing the imports of pepper-related items such as frozen peppers, but it was analyzed to be insignificant. That reason was that the replacement substitution elasticity of the pepper-related items for TRQ import was less than 1 (inelastic). Therefore, it is judged that the government's operation of the pepper TRQ is preferably focused on stabilizing domestic prices rather than focusing on import control of pepper-related items.

• Journal of the Korea Convergence Society
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• v.11 no.5
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• pp.335-340
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• 2020

In this study we conducted a questionnaire survey by purposive quota sampling(n=566) by status of workers(permanent workers, temporary workers and business owners) and age group(20-59 years old) for single households engaged in economic activities in order to compare the health behaviors and health checking by employment type and age. By employment type, the sleep time of permanent workers was significantly less than that of other groups(p<0.001), and the rates of health and oral examinations in permanent workers were significantly higher(p<0.001). By age group, as the age increased, the oral condition was worse(p<0.001), but the rates of not taking oral examinations were significantly higher(p=0.023). This study can be meaningful as basic data for making a healthy living environment according to various characteristics of single households.