• 한국도로학회:학술대회논문집
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• 2004.02a
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• pp.123-130
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• 2004

• Proceedings of the Korean Society of Propulsion Engineers Conference
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• 2002.10a
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• pp.61-64
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• 2002

No Abstract, See Full Text

• Environmental Engineering Research
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• v.9 no.3
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• pp.125-129
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• 2004

• Journal of the Korean Home Economics Association
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• v.48 no.3
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• pp.31-41
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• 2010

This study analyzes the difficulties that student teachers, beginning teachers and experienced teachers face in the field of kindergarten, and urgent support requests. The total of participants was 372 of this number, 122 were student teachers, 118 were beginning teachers and 132 were experienced teachers. The results showed the difference in difficulties and the needed support requests among student teachers, beginning teachers and experienced teachers. Student teachers had the difficulty of time management, but beginning teachers and experienced teachers had trouble due to the nonexistence of assistant teachers. Student teachers required teaching strategies for starting relationships with children within responsibility. Beginning teachers and experienced teachers regarded the plan, practice, and evaluation of a program as the most needed support request. Collectively, the results revealed that expansion of the practice period is necessary for student teachers so that they can gain experience with children, parents, and the children's education institution with various opportunities as a learning course.

• Journal of Korea Multimedia Society
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• v.19 no.4
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• pp.780-788
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• 2016

Development of information and communication technologies has given a lot of changes in the business processing methods including the school and class managements. However, many business processing systems are still based on desktop computer. In particular, most of the class management system only supports desktop computers; hence school teachers have difficulty in using their class managements systems on mobile environment. In this paper, we proposed and developed a mobile classroom management system for teachers, which will easily handle information such as personal records of students, student counseling records, student life record and so on. The implementation of the application of mobile-based class management can be managed by many school elements including student register information, student evaluation records and transcripts, counseling report, and so on.

• Journal of the Korean Geotechnical Society
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• v.29 no.10
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• pp.49-56
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• 2013

The use of geothermal energy has been increased for economic and environmental friendly utilization. Ground thermal conductivity and borehole thermal resistance are very important parameters in the design of geothermal heat pump system. This paper presents an experimental study of heat exchange rate of U and W type ground heat exchangers (GHEs) measured by thermal performance tests (TPTs). U and W type GHEs were installed in a partially saturated dredged soil deposit, and TPTs were conducted to evaluate heat exchange rates under 100-hr continuous operation condition. The heat exchange rates were also calculated by analytical models to estimate borehole thermal resistances and were compared with experimental results. It comes out that multi-pole and equivalent diameter (EQD) models resulted in more accurate agreement than shape factor (SF) model which is currently more often used.

• Korean Journal of Adult Nursing
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• v.27 no.5
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• pp.527-536
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• 2015

Purpose: The purpose of this study was to analyze the trend of nursing theories by Korean Journal of Adult Nursing (KJAN) for the last five years and to provide future directions for improvement. Methods: The study analyzed data collected from 323 research papers published in KJAN between 2010~2014. Descriptive analysis was conducted with a focus on frequency and percentage for the quantitative analysis. Qualitative analysis was performed for the analysis of nursing theories. Results: As for research topics, the analysis results based on the meta-paradigm of nursing show that the most frequent factors of analysis were adult patients in the area of human beings, hospitals in the area of environment, depression, anxiety, and suicide in the area of health, and all the influential factors in the area of nursing. The analysis results of uses of nursing theories in the papers reveal that only 4(1.2%) out of total 323 papers used the nursing theories, which indicates that the linkage and utilization of nursing theories in the published papers for the last five years were poor. Conclusion: We needs to make efforts at the society level to activate nursing theory utilization in research which is beloved to connect nursing practice, education, and research.

• Proceedings of the Korean Society of Propulsion Engineers Conference
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• 2004.03a
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• pp.85-92
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• 2004

As a research to develop a SCRAM jet engine is actively conducted, a necessity to produce a high-enthalpy flow in a laboratory is increasing. In order to develop the SCRAM-jet engine, stabilized combustion in a supersonic flow-field should be attained, in which a duration time of flow is extremely short. Therefore, a mixing process of breathed air and fuel, which is injected into supersonic flow-fields is one of the most important problem. Since, the flow inside SCRAM jet engine has high-enthalpy, an experimental facility is required to produce such high-enthalpy flow-field. In this study, a detonation-driven shock tunnel was built and was used to produce high-enthalpy flow. Further-more, SCRAM jet engine model equipped backward-facing step was installed at test section and flow-fields were visualized using color-schlieren technique and high speed video camera. The fuel was injected perpendicular to the flow of Mach number three behind backward-facing step. The height of the step, distance of injection and injection pressure were changed to investigate the effects of step on a mixing characteristic between air and fuel. The schlieren photograph and pressure histories show that the fuel was ignited behind the step.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2003.05a
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• pp.870-875
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• 2003

This paper deals with the free vibrations of horizontally curved beams with the general boundary condition, which consists of translational and rotational springs. The equations of general boundary condition of such beams are derived, while the ordinary differential equations governing free vibrations are adopted from the literature. The parabola as the curved beam's curvilinear shape is considered in numerical examples. For calculating the natural frequencies, the governing equations are solved by numerical methods. The Runge-Kutta and Determinant Search Methods are used for integrating the differential equations and for calculating the natural frequencies, respectively. for validation purpose, the numerical results obtained herein are compared to those obtained from the SAP 2000. With regard to numerical results, the relationships between frequency parameters and various beam parameters are presented in the forms of Table and figures.

• Proceedings of the Korea Institute of Fire Science and Engineering Conference
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• 1997.11a
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• pp.260-268
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• 1997

The safety of LPG vessel storage has been simply designed and controled with blast wave barrier structure concept regardless of its quantity or hazardous situation. The limit of regal controls on LPG vessel storage need to be identified in terms of safety buffer distance from LPG explosion. The level of overpressure effect and heat radiation In the safety structure and neighbouring human activity required to be estimated to find the gap between existing controls on such storage. To this content the paper discuss the issues on the approach In the blast wave barrier and safety separation distances.