• Journal of the Korea Academia-Industrial cooperation Society
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• v.17 no.1
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• pp.88-98
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• 2016

The Korean summer is hot and humid, and air-conditioners consume considerable amounts of electricity. In such cases, the simultaneous use of indirect evaporative coolers may help reduce the sensible heat and save electricity. In this study, heat transfer and pressure drop characteristics of indirect or regenerative evaporative coolers made from plastic/paper are investigated. The results showed that heat and mass transfer model based on the ${\epsilon}-NTU$ method predicted the indirect evaporation efficiencies, cooling capacities and pressure drops adequately. Both for indirect or regenerative evaporative cooler, the indirect evaporation efficiency increased with increasing dry channel inlet temperature or relative humidity. The indirect evaporation efficiency of the regenerative evaporative cooler was larger than that of the indirect evaporative cooler.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.17 no.11
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• pp.732-739
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• 2016

In Korea, the summer is hot and humid, and much electricity is consumed for air conditioning. Thus, the simultaneous usage of an indirect evaporative cooler and a common air conditioner could reduce the sensible heat and save electricity. This study developed a U-type cross-counter flow indirect evaporative cooler (IEC) made of plastic and paper. The efficiencies were compared with those of a cross-flow IEC. The specimen was $500mm{\times}500mm{\times}1000mm$. the results show that the indirect evaporation efficiencies of the cross-counter flow sample were 6-21% higher than those of the cross-flow sample. The pressure drops of the cross-counter sample were 51-66% higher. Thermal analysis based on the -NTU method predicted the experimental data within 10%. The electrical energy saved by the use of the cross-counter flow IEC was larger than that of the counter flow IEC, and the difference increases with the velocity. However, the the cross-counter IEC is two times larger than the cross-flow IEC, which may increase the material cost and water usage.

• Proceedings of the KAIS Fall Conference
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• 2007.11a
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• pp.81-84
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• 2007

In this thesis, we have designed the indirect adaptive controller using Dynamic Neural Units(DNU) for unknown nonlinear systems. Proposed indirect adaptive controller using Dynamic Neural Unit based upon the topology of a reverberating circuit in a neuronal pool of the central nervous system. In this thesis, we present a genetic DNU-control scheme for unknown nonlinear systems. Our method is different from those using supervised learning algorithms, such as the backpropagation (BP) algorithm, that needs training information in each step. The contributions of this thesis are the new approach to constructing neural network architecture and its training.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.8 no.5
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• pp.1227-1242
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• 2007

This study aims at grasping the influence of antecedents within SCM to information sharing and cooperation as well as the influence of information sharing on cooperation among the small & medium-sized manufacturing industries, thus ultimately opening the way to the study on the influence of major activities such as information sharing and cooperation within SCM on the business performance by classifying such influence into low perspectives of BSC. The results of this study revealed that the antecedents such as commitment and cultural similarities exercised a significant influence on information sharing while mutual trust and the size of a corporate weighing with cooperative activities. It also identified the fact that information sharing bore a significant influence on cooperation in terms of relationships among activities. For the relationships between the SCM activities and performance, cooperation proved significant to all four balanced scorecard performances with little significant influence of information sharing on balanced scorecard performance. However, taking into consideration of the significance of information sharing on cooperation as well as the significant influence of cooperation on balanced scorecard performance, it fumed out that information sharing also effected a indirect influence on such four types of balanced scorecard performance. In this regard, based on the results of this study, it was identified that information sharing and cooperation, major activities within SCM, had either direct or indirect influence, through the influence of antecedents, on the business balanced scoreboard performance measured from a customer perspective, a business process perspective, an innovation and teaming perspective and a financial perspective.

• Journal of Korean Library and Information Science Society
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• v.42 no.4
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• pp.223-241
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• 2011

The purpose of this study is to propose supporting small libraries through investigating the ordinances of local governments. Based upon identifying of ordinances, there are direct and indirect supports for small libraries from local governments. Direct support is provide budget to small libraries and indirect supports are a cooperation between public library and small library, instruction for library staff, and supporting volunteers. Supporting methods for public small library are direct and indirect supports, but method for private library is indirect support.

• Proceedings of the Korea Database Society Conference
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• 2010.06a
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• pp.235-247
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• 2010

Introduction of ICE(Integrated Collaboration Environment) has a great effect on corporate performance. In particular, it is expected that information sharing and collaboration among transaction partners will be an important factor which mediates ICE and its performance. Under such a background, this research intends to identify the influence of ICE by manufacturing industry on corporate performance through role of the parameter of information sharing and collaboration. The result of this research may be summed up as follows: ICE promotes information sharing and collaboration among enterprises, it accelerates integration of supply chain network among enterprises and cooperation. In particular, ICE has a great effect on information sharing. And information sharing has a direct effect on collaboration and performance. However, when we classify corporate performance into the "performance due to introduction", which is direct performance, and the "overall performance", which is indirect performance, the result of this research is as follows: information sharing has a great effect on the performance due to introduction, but does not have a meaningful effect on indirect performance. On the other hand, collaboration does not have any effect on the performance due to introduction, but has a meaningful effect on the overall performance, which is indirect performance. It is necessary to study and analyze additional this result in future.

• Journal of Korea Game Society
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• v.10 no.3
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• pp.3-13
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• 2010

This study suggests about industrial-educational cooperation model through a case study by practical training by industrial-educational cooperation. Practical training of game development process is organized as industrial-educational cooperation pipe-line to represent whole process model, and step-cases about this are described. The purpose of this study is for learners to experience practical industry development process in a direct or indirect way. And above all, educators role in each stages of development is also important. This study would be used as a reference data about practical training and studies related with industrial-educational cooperation.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.21 no.11
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• pp.892-897
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• 2020

Previous plastic heat exchangers are expensive because the mold must be newly manufactured depending on the air conditioning space. On the other hand, danpla is so thin that the heat exchange performance is excellent. Moreover, danpla can be used easily in ventilation systems in view of fabrication. This study proposes correlations for the cooling performance of an indirect evaporative cooling system. The experimental apparatus consisted of a heat exchanger, spray nozzle, fan, thermostat, pump, and measuring sensors for temperature, humidity, and airflow rate. The results showed that the effectiveness decreased gradually as the airflow rate increased. In addition, there was an optimal condition in terms of effectiveness. The performance prediction correlations were determined using the experimental data from various conditions. The proposed correlations showed performance accuracies within 4 % error.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.16 no.8
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• pp.5160-5171
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• 2015

The purpose of this study is to find out the explanatory power of the mother psychological characteristics (self-efficacy, self-esteem, depression, parenting stress), infant temperament, parenting look at how the variables affect the infant development. Study is an infant born in 2008, 1802 mothers name. Child Policy Research Institute Korea Children's Panel 3rd year data were used for the study. Analysis of the data was analyzed using the SPSS 18.0 correlation evaluate the direct and indirect effects between the path and the effect of each variable on infant development through Amos 16.0. The results were as follows. First, the mother significant indirect effect of mothers had a positive impact due to the influence of positive parenting Infant Development Psychological variables were mother and mediating role of parenting behavior was completely mediated in the path to infant development. Second, infant temperament and parenting mothers showed a complete mediating effect on the path to the Infant Development were significant indirect effects mediated by parenting mothers on infant development. Third, the direct effects on the mother parenting infant development showed a statistically significant result.

• Korean Journal of Social Welfare
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• v.66 no.2
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• pp.287-317
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• 2014

The study conducts a comparative study of the supporting systems and methods of social enterprises in Korea, Japan, and Hong Kong to propose a policy on sustainable growth of social enterprises and their long-term activation. By investigating previous studies, this researcher drew the frame of a comparative analysis and conducted the comparative analysis. First, regarding the supporting system for social enterprises, it was found that Korea had better institutional foundation and system, whereas Japan had better activation, cooperation and network of intermediary support organizations. In Korea there is the law related to social enterprises, and the government takes control of all of the organization in charge of the policy, intermediary support organizations, cooperation and network, and authentication system. However, Hong Kong has yet to establish a basic institutional system to grow and activate social enterprises, and foreign intermediary supporting organizations increase the network and cooperation level to support social enterprises. Thirdly, for supporting methods for social enterprises, there were direct financial support, indirect business support and other kinds of support in Korea, whereas indirect support was activated in Japan. Although The Hong Kong government barely supports social enterprises, it comes up with a plan to support the firms serving as social enterprises under its the 12th 5-year development plan. For sustainable growth of Korean social enterprises, this study suggested the change of the government policy to the direction of creating social enterprise ecosystem through cooperation and network activation, indirect support in the middle of process, and activation of intermediary support organizations.