• Journal of the Korea Safety Management & Science
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• v.9 no.6
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• pp.137-146
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• 2007

The objective of this paper is to study the establishing system of truck collaboration and to reduce traffic cost for participating transportation enterprises. The system of truck collaboration can enhance the transport efficiency and to reduce traffic cost without new investment for trucks and equipments. The type of truck collaboration should be enumerated (1) the system of head and branch base (2) the system of central terminal (3) the system of separating collection and delivery for cargo (4) the system of cooperating cargo order and truck allocation. The efficiency of truck collaboration is possible to be realized for transportation enterprises, receiver and sender of cargo.

• Korean Journal of Human Ecology
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• v.17 no.5
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• pp.903-914
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• 2008

The objective of this research was to investigate whether emotional experience and change in depression and stress in the regional children center was affected by participating in the recreation program. For the objective of research, pre-post test control group design was carried on to 21 primary school pupils and middle school students who participated in the regional children center after school. Children's emotional experience, depression and stress that children experienced while they stayed in regional children center were measured. The experimental group showed low negative emotion and high positive emotion after participating the recreation program. It can be concluded that the recreation activity in the regional children center is effective in diminishing the children's depression and stress.

• Journal of Fisheries and Marine Sciences Education
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• v.28 no.2
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• pp.428-438
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• 2016

The purpose of this study was to identify the differences of characteristics of life and psycho-social factors between elderly women participating in a senior's college(SC) and an exercise prescription(EP) service from social services. Data were collected using in-depth interview and questionnaire from 39 in a SC and 76 EP. SC group were associated with higher level of cognitive function and life satisfaction than EP group. These findings suggest that differentiated programs and multidisciplinary convergence services to improve mental and physical health of elderly women.

• Journal of Family Resource Management and Policy Review
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• v.10 no.3
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• pp.79-96
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• 2006

The purposes of this study were to analyze the types of leisure activities and level of leisure satisfaction with practice of a five-day workweek, and examined the relationship between leisure satisfaction and job satisfaction. The data were based on the questionnaire with 264 working employee residing in Seoul. The results indicated that the most frequently participating activities were sports, use of media, loaming activities in order. And there were no significant differences in types of leisure activities between 5 day working employees and 6 day working employees. Secondly, general level of leisure satisfaction was the highest when participating religious activities. Thirdly, it was found that only social satisfaction was positively related to job satisfaction, and social satisfaction influenced job satisfaction. Further discussions and implications were discussed.

• Journal of the Korean Home Economics Association
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• v.47 no.8
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• pp.53-69
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• 2009

Having developed a parent education program for guidance of internet-using children, we evaluated the effectiveness of this program. The program consisted of five two-hour sessions. It was test-run with nineteen participants, which included mothers of elementary school children. In the evaluation of the program, we employed so-called 'pretest-posttest control group design' which compares the difference in the parenting sense of competence, parents' sense of role satisfaction, parents' sense of insecurity, and parents' rearing attitudes between the experimental group and the control group. Program evaluation revealed that the parenting sense of competence and role satisfaction increased in the group that participated in the program compared to the non-participating group. Furthermore, the parents' sense of insecurity decreased and democratic rearing attitudes were fostered in the participating group.

• Transactions of the Korean Society of Mechanical Engineers
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• v.19 no.11
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• pp.2995-3002
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• 1995

The cooling problem of the hot internal pipe flow has been investigated. Simultaneous conduction, convection, and radiation were considered with azimuthally varying convective heat loss at the pipe wall. A complex, nonlinear integro-differential radiative transfer equation was solved by the discrete ordinates method (or called S$_{N}$ method). The energy equation was solved by control volume based finite difference technique. A parametric study was performed by varying the conduction-to-radiation parameter, optical thickness, and scattering albedo. The results have shown that initially the radiatively active medium could be more efficiently cooled down compared with the cases otherwise. But even for the case with dominant radiation, as the medium temperature was lowered, the contribution of conduction became to exceed that of radiation.n.

• YAKHAK HOEJI
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• v.36 no.4
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• pp.379-389
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• 1992

In order to investigate the effect of nifedipine, $Ca^{+2}$ channel antagoninst, on the action of some drugs participating in blood pressure, this experiment was peformed in rabbits. Nifedipine decreased the pressor actions of norepinephrine, angiotensin and carotid artery clamping, but did not affect the pressor actions of tyramine and depressor actions of acetylcholine and pilocarpine. Nifedipine inhibited the potentiated pressor action of norepinephrine and angiotensin, but did not influence the potentiated pressor action of tyramine in rabbits pretreated with chlorisondamine, ganglionic blocking agent. Nifedipine weakened the potentiated pressor action of norepinephrine, did not affect the pressor action of angiotensin and the potentiated pressor action of tyramine in rabbits pretreated with debrisoquine, sympathetic neuronal blocking agent.

• Journal of Korea Multimedia Society
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• v.22 no.8
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• pp.887-896
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• 2019

In this paper, we discuss an optimization approach for time-synchronizations in networked simulators. This method is a sub-technology that is required to combine heterogeneous simulators into a single simulation. In previous time-synchronization studies, they had built a network system among networked simulators. The network system collects network packets and adds time-stamps to the networked packets based on the time that occurs in events of simulation objects in the individual simulators. Then, it sorts them in chronological order. Finally, the network system applies time-synchronization to each simulator participating in interworking sequentially. However, the previous approaches have a limitation in that other participating simulators should wait for while processing an event in a simulator in a time stamp order. In this paper, we attempt to solve the problem by optimizing time-synchronizations in networked simulation environments. In order to prove the practicality of our approach, we have conducted an experiment. Finally, we discuss the contributions of this paper.

• Journal of Environmental Science International
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• v.30 no.8
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• pp.693-702
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• 2021

The purpose of this study was to provide basic data for developing effective forest healing programs for retirees by identifying their characteristics and preferences. A survey was conducted on demographic characteristics, overall perceptions of forest healing, and preferences for forest healing programs, targeting a total of 258 retirees visiting a natural recreation forest and a healing forest. The results of the survey suggested that the awareness of the forest treatment program and the hope of participating in it were both high, but the experience of participating in the program was low. Among the forest healing programs, the order of preference was "Breath in the forest", "Wind bathing and sunbathing", and "Feeling negative ions in the valley". Based on these results, it is expected that the forest healing program for retirees will be used as basic data for development of such programs in the future.

• Smart Media Journal
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• v.12 no.3
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• pp.85-92
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• 2023

This study was conducted to investigate the motives and effects of artists and teachers who participated in the ' Explore Life through Art' support project for school education by theme of culture and arts. As a result of research analysis using online survey and in-depth interview research method, it was found that both intrinsic and extrinsic motives have a complex effect on artists and teachers' motivation to participate in the project. As for the effectiveness of participating in the project, the trust between artists and teachers and the contribution of education were positive, but the trust and satisfaction with the institution were negative. In order to increase the effectiveness of the project, it is required to improve the operation and management of the operating institution. Motivation and effectiveness of project participation are important factors in improving the quality of a project, and it is hoped that this study will serve as a basis for practical discussions on the role of operating institutions and projects.