• Journal of the Korea Academia-Industrial cooperation Society
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• v.19 no.8
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• pp.127-136
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• 2018

In daycare centers, the head teacher requires the leadership to effectively meet the demands of nursery facilities, since he or she plays a role of middle management in charge of communication with the director and the teachers. Therefore, this study aimed to investigate the structural relationship between the head teacher's leadership and job satisfaction of childcare teachers to enhance their organizational commitment and improve service quality and operation of nursery facilities. A survey was conducted of childcare teachers in national and public daycare centers located in Gyunggi Province from February to March 2018. Statistical analysis was performed using SPSS 23.0 and AMOS 23.0 statistical programs. Analysis results found that leadership of the head teacher positively affected job satisfaction and organizational commitment of childcare teachers. Second, the job satisfaction of childcare teachers positively affected organizational commitment. Third, job satisfaction of childcare teachers had a mediating effect in the relationship between the head teacher's leadership and the childcare teachers' organizational commitment. Results of this study suggest that effective leadership of the head teacher should be exercised to enhance the organizational commitment of childcare teachers.

• Proceedings of the Korea Contents Association Conference
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• 2007.11a
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• pp.80-83
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• 2007

Entering 21st century, various natural disasters have been caused by the scorching heat wave, earthquake, tsunami, typhoon and so on. The casuality and damages have been drastically increased in terms of the frequency and magnitude. Therefore, 50 nations around the world agreed to build up the GEO(Global Earth Observation) in charge of the earth observation for the understanding of the earth system changes, monitoring and prediction and it is on operation. To keep the pace with GEOSS for the cooperation of Science & Technology and to successfully achieve the GEOSS project, KGEO office was established and has been on its duty. Moreover, for more prosperous building of the GEOSS, in cooperation with KGEO and KISTI(Korea Institute of Science and Technology Information), we've conducted the survey of the domestic situation about 9 societal benefit areas of the GEOSS. This survey consists of 5 sections as follows: the standardization, the information system management, the raw data and metadata, the infrastructure, and the others. This survey results will be used as the basic material for establishing the National Global Earth Observation System.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.14 no.12
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• pp.6461-6468
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• 2013

This research is conducted to investigate musculoskeletal diseases' that can be developed in paramedics body whose are in charge of emergency situations before they arrive at the hospital. The data were collected from 216 of paramedics from July 2, 2012 to July 31, 2012. As a result, 57.9% of participants have already felt the subjective symptoms of the muscular skeletal diseases, and 47.2% of them felt the pain on their waists and hips. These pains are highly related to their working situations. In the aspects of the muscuoskeletal diseases' symptoms, general characteristics, gender (t=16.579, p=.000), age (t=102.344, p=.000), education (t=5.363, p=.027), drinking (t=6.999, p=.030), and smoking (t=6.266, p=.009), have significance differences. Professional characteristics, career (t=67.684, p=.000), passengers of the ambulance (t=7.717, p=.004), qualification or license (t=25.480, p=.000), and position (t=74.615, p=.000), have also significance differences.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.16 no.3
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• pp.1600-1604
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• 2015

As modern houses are constructed with high-density and high-insulation, there is benefit to reduce energy consumption, but there are many side effects raised from polluted air. To solve the problem, a ventilation system is used to improve a indoor air quality. In this research, we experimentally estimate ventilation performance of HRV(heat recovery ventilator) with heat-pipe according to working fluid filling quantity and ventilation. Heat-pipe used in this study was designated separately to be applied to a ventilation system. The working fluid was R22, which was filled from 40 to 55 (%vol.) by 5(%vol.). Ventilation based on the front velocity was measured from 0.3 m/s to 1.5 m/s by 0.3 m/s intervals. Refrigerant filling quantity with the highest efficiency was found to depend on the ventilation. From this study the optimal refrigerant filling quantity in accordance with the ventilation of the detachable heat pipes was found experimentally.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.17 no.11
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• pp.610-615
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• 2016

Diverse accessories are used in automobiles, such as navigation systems, front and rear cameras, spoilers, and sun visors. Sun visors block sunlight so that drivers can drive safely with a better view, and they are used in many automobile designs. However, when large plastic products are manufactured using injection molding, there are many difficulties that develop, like weld lines, short shots, flow marks, imperfections, and distortion. In this study, a CAE simulation was conducted based on previous results to predict potential problems in the injection molding of large products. The flow characteristics up to complete charge for the melting resins were captured using a computer-aided engineering simulation. The temperature departure on the front part of a flow was about $10^{\circ}C$ and very stable. The practical ejecting time of the cold runner was about 70 seconds in the simulation. Finally, the capability of a suitable injection machine was calculated and recommended by prediction of the injection pressure and the die clamping force.

• Journal of Korean Society of Rural Planning
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• v.8 no.2 s.16
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• pp.27-41
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• 2002

This research is written for offering an approach to activate the stagnated industry of the tourist farm through analysis of the current operational problems and situation on some existing tourist farm nominated as such by the authority. There will be some considerations from three different categories : local autonomous groups, tourist farm associations and farm owners. On the other hand, it is assumed that this research can also be utilized as a basic material for activating the tourist farms in the suburban area of Taegu City. The operational problems in the suburban area of Taegu City are as follows : lack of a specialized Product development, the farm operation fund, lack of operational or management ability, lack of public information, etc. There are other Problems regarding law, institution and supporting : complexity of the current system involving all kinds of permission, shortage of financial and taxation supporting, lack of training an expert manpower, lack of ability and cooperation of a deskclerk in charge, etc. Here are some suggestions taking into consideration a respective sector of local autonomous group, tourist farm associations and farm owners for activating the tourist farms in the suburban area of Taegu City. First, a mental turnabout toward a tourist farm is needed from local autonomous groups. The law and institutional base should be arranged while the financial and taxation support is materialized. Second, tourist farm associations should amend or reinforce the existing institution to refresh the current recognition toward the tourist farm through many publicity activities. On the other hand, they should develop the overall tourist farm industry into a better service industry of the rural community by keeping an active system of cooperation with other related groups. Finally, It is advised that they should conceive farms and facilities which can symbolize the tourist farm from the stage of the first construction. In addition to a four-season souvenir development, an effective publicity activity and rational investment management. Above all, they should train themselves in terms of a service spirit before they see the prosperity of the tourist farm community.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.18 no.10
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• pp.185-196
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• 2017

This study was conducted to investigate the practical experience of nurses in MERS patients care. Nine nurses in one general hospital in S city underwent in-depth interviews from August 2015 to March 2016. The collected data were analyzed according to the procedure of the phenomenological method of Colaizzi. The following five categories were derived: '1. Anxiety and burden due to the risk of transmission of new infectious diseases', '2. Social isolation because of being the nurse in charge of MERS patients', '3. Faced with problems due to an unprepared treatment environment', '4. Overcome the burdensome MERS patient care process', '5. Reflect on the steps for preparing against new infectious diseases'. These results suggest that it is important to draw positive experiences as well as the negative effects of nurses who are involved in treatment of various infectious diseases, including MERS. Based on this, it can be used as a basis for reducing negative psychological and social impacts and improving positive adaptation. Additionally, it is necessary for healthcare workers including nurses to establish the necessary workforces, departments and guidelines for nursing new infectious disease patients.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.12 no.10
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• pp.4308-4313
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• 2011

The objective of this study is to investigate the cooling performance of the roof mounted air-conditioning system using electric driven scroll compressor for zero emission vehicles. This air conditioner with air source was used R-134a as a refrigerant and tested under various operating conditions such as refrigerant charge amount and indoor temperature, and compressor frequencies. Experimental results revealed that at all tested compressor frequencies, heat transfer rate of the evaporator increased and the cooling COP increased with the indoor temperature. In addition, the heat transfer rate of the evaporator was over 25.0kW sufficient for the cooling loads of an electric bus.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.14 no.11
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• pp.5357-5365
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• 2013

In this paper, we propose that a model based design for a electric tractor system by using ASM(Automotive Simulation Models). Before developing a realistic electric tractor, it is essential that defining the capacities of power sources and optimizing the parameters of electric tractor. In additionally, because the electric tractor must have not only driving function but also working function, two PMSM are used at electric tractor. ASM which is based on simulink and Carsim were used to design a electric system and powertrain of electric tractor. For verifying the electric tractor system, we compared the design parameters such as max power, state of charge, drive distance, velocity which were carried out by the simulation and experimental method. The predicted results by the development model were in good agreement with the simulation results. According to simulation of tractor, it is possible to arrange the advanced research of dynamical characteristic of tractor and present the guidelines for the electrical driving system.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.15 no.8
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• pp.5213-5218
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• 2014

Organic memory devices were made using the plasma polymerization method. The memory device consisted of ppMMA(plasma polymerization MMA) thin films as the tunneling and insulating layer, and a Au thin film as the memory layer, which was deposited by thermal evaporation. The organic memory operation theory was developed according to the charging and discharging characteristics of floating gate type memory, which would be measured by the hysteresis voltage and memory voltage with the gate voltage values. The I-V characteristics of the fabricated memory device showed a hysteresis voltage of 26 [V] at 60 ~ -60 [V] double sweep measuring conditions. The programming voltage was applied to the gate electrode in accordance with the result of this theory. A programming voltage of 60[V] equated to a memory voltage of 13[V], and 80[V] equated to a memory voltage of 18[V]. The memory voltage of approximately 40 [%]increased with increasing programming voltage. The charge memory layer charging or discharging according to the theory of the memory was verified experimentally.