• The Transactions of the Korean Institute of Power Electronics
• /
• v.13 no.1
• /
• pp.15-21
• /
• 2008

This paper presented a actual conditions on a false-tripping of ELB(Earth Leakage Breakers) and an assessment of the harmonics due to non-linear electronic equipment such as personal computers, rectifier, electric furnace and test equipments in factory electrical installation. Actual conditions on a failure of ELB were surveyed and analyzed by making up a question to safety managers of factory electrical installation. Also, power quality measurements such as harmonic currents, voltage and current waveform and current imbalance were made at various factory electrical installation where nuisance tripping of ELB is often occurred. The results of this study can be used in making decisions regarding cause of ELB trip and operating and tripping characteristics test of ELB when subjected to distorted current waveform.

• Journal of Korea Society of Digital Industry and Information Management
• /
• v.14 no.2
• /
• pp.79-90
• /
• 2018

This study aims to provide the system to help decision making by finding key indicators used in land supply and demand surveys, and by developing storage priority areas and projects. As problems arose such as the rising cost of public projects or disruptions to business progress due to the rapid rise in land prices and the cost of compensation for public projects in the past, a new land policy was adopted and the land reserve system was established in 2009. At that time, The bank's goal was to conserve 2 trillion won of land per year, but the result was sluggish as it accumulated a total of 1.6 trillion won from 2009 to 2015. The reason for this sluggish result is that the type and quantity of indicators are still extensive and the survey of land supply and demand has a problem of poor utilization. In order to make up for the sluggishness, we made key indicators used in land supply and demand surveys using the question investigation, and analyzed the priority of the project areas. This study provide the system to help decision making by finding key indicators used in land supply and demand surveys, and the priorities of project areas.

• Proceedings of the Korean Institute of Building Construction Conference
• /
• 2004.05a
• /
• pp.113-117
• /
• 2004

We need the contingency cost in order to deal with the uncertainty to be accompanied inevitably at the construction and an every kind risk not to forecast in advance. And also the contingency colt needed for the change order and we need it for reduction of the delay and reduce the trouble between owner and constructor. This study, through checking and analyzing the risk factor, in the step of domestic construction, suggests optimal management reserve to specific business about the contract type and the scale. The main results of this research are summarized as follow. First, I investigated the recognition about the contingency cost, grasped the risk to be happened at the construction step and found out the frequency occurrence, through making up question to engineer are carrying out their job in the domestic construction. Second, I computed optimal contingency cost rate by the statistics investigation, and proposed an improvement plan and problem when compute a contingency cost.

• Journal of information and communication convergence engineering
• /
• v.7 no.4
• /
• pp.465-468
• /
• 2009

There is to solution the environmental data which the importance is seriously taken into consideration in the the 21st century that is set up whether or not be a welfare society advanced country according to quality of life elevations through environments in question to a preferential assignment for an environmental control will decrease of measures, and be proceeded so as to be urgent. However, shall get measurement of a correct environmental pollution duty and reduction measures stopped on bases of the data which there is reliability, and decrease excessive pollution than what, and may overcome efficiency of waste of cost environmental pollution management. Environmental pollution data collected are regarded as important, and, specially, a collection of environmental data forecast a pollution circle, or to analyze future development is important very at an environmental policy decision or decision making step to be national besides pollution reductions.

• Journal for History of Mathematics
• /
• v.27 no.5
• /
• pp.313-327
• /
• 2014

Based on the importance and the necessity of the study on history of mathematics and mathemtics education using history of mathematics for finding the cultural identity and values of our traditional mathematics, we refer to two types of teaching and learning methods utilizing 'WonYongSamBangHoGu', the second theme of 'SanSulGwanGyeon' written by Lee Sang Hyuk. First, we present various cases of 'WonYongSamBangHoGu' constructed utilizing kind of mathematics learning software, GeoGebra by high school freshmen belonging to the Education Centers for the Gifted in Seoul Science Park. Second, We modernly reinterpret the questions contained in 'WonYongSamBangHoGu' and show several developed items using it.

• KIEAE Journal
• /
• v.8 no.6
• /
• pp.47-55
• /
• 2008

The purpose of this study is as follows. 1) An element to organize the landscape of an apartment entrance space and setting up, a characteristic of landscape through the actual condition analysis. 2) The characteristic of the type analysis and classified the shape of the entrance as the type. 3) The degree to like the landscape analysis through the making up question. The result of this research is as follows. The entrance of the apartment complex of 71 as of 92 and set an element to organize the landscape and the characteristic of landscape through the frequency analysis and divided an entrance landscape of apartment into 4 types through the cluster analysis. An entrance landscape of apartment types of the entrance is classified as follows. 1) Type I: A model wall-fence type, 2) Type II: The side constructing a building-fence type, 3) type III: The side constructing a building-retaining wall-mixing tree type, 4) type IV: The moulding constructing a building-a retaining wall type.

• Journal of Science and Technology Studies
• /
• v.13 no.1
• /
• pp.145-180
• /
• 2013

STS studies into science documentaries for television are rare, and they do not even reflect the constructivist fruits of STS. STS have been calling for the need of analyzing 'science-in-the-making' in order to understand science more deeply. Similarly, our starting point is the assumption that science documentary can be better understood when we look into its making process. Under this assumption, we adopted the method of participant observation in analyzing 'documentary practice', trying to open the 'black box' called 'science documentary'. We have here focused on the documentary named "Light" made by a scientific documentary team of EBS, who made "Culture and Mathematics" and "Life". Each of us worked as a main consultant and an assistant staff in making "Light". We will address two main points in this study. First, based on our participant observation and interviews, we will show that the members of documentary making team are thinking about 'science' in distinctive ways. The team tended to emphasize visualization, knowledge linked to people's everyday life, and the distinctive characters of scientists who appear in the documentary. Second, by looking closely into the interaction between the team members and the consultant in the process of completing the script of the documentary, it was possible to understand how the contents of the documentary was constructed more accurately. In the making process, consultant's idea was not simply accepted by the making team, but there were conflicts and compromises. By showing this, we will be able to bring up a reflexive question about the role of consultant in the process of making a science documentary.

• Journal of Korean Elementary Science Education
• /
• v.25 no.spc5
• /
• pp.485-494
• /
• 2007

The aims of this study were to investigate the differences of the proportion of misconceptions and the reasons for selecting responses related to questions about small living things between talented and average students. The study subjects were made up of three groups. They were a class of 37 talented elementary students in science attending J National University of Education, a class of 37 talented students in science attending J City Office of Education, and a class of 33 average students attending J City. A questionnaire was composed of 20 test questions for examination of concepts related to small living things. The data obtained in this study was analyzed using a statistical program. The major results were as follows: In general, the level of the scientific concepts possessed by the talented students was much higher than that of the average students, especially in question 14. The reasons for the misconceptions which were revealed through this study were classified into vagueness of the language used, hasty decision and deduction making, using the wrong analogical inference, mass communications (TV or internet) and experimental differences between individuals. In terms of the reasons for the selection of a given response, the talented students had also a higher frequency in the 'science books for children' category than the average students, indicating that various kinds of science books for children have an influence on the formation of concepts on small living things. The misconception proportion of male students was 5.4% higher than that of female students in mean frequencies of all questions, although the difference was not statistically significant except for question 4. Data from this study may help teachers involved in education for gifted students to reconsider their conceptions on small living things.

• Korean Journal of Adult Nursing
• /
• v.17 no.4
• /
• pp.548-560
• /
• 2005

Purpose: High risk women with congenital heart disease decide to get pregnancy is determined by not individual autonomous intention but complex interaction with their physical status and socio-psychological environments. This study tried to the answer to the question. : "What is experience high risk women who have congenital heart disease during transition to parenthood?". Method: A micro-ethnographic research method and oral historic research approach were done at the Grown-Up Congenital Heart Disease Clinic in one Korean metropolitan city from July 2002 to September 2003. Result: It was discovered that high risk women's experience of transitional parenthood is accounted as the process of lonely and fearful self-accomplishment. Their need for self-accomplishment creates them seek more opportunities to increase enduring abilities for their parenthood. Conclusion: We suggest that from the time of beginning of patient's making decisions about becoming pregnant, collaborative efforts must be considered that priority level of patient's needs be reviewed and find appropriate advices for their situation. Special counseling program should be provided to all the prospective parents with understanding their meaning of parenthood.

• Journal of Korean Academy of Nursing Administration
• /
• v.18 no.1
• /
• pp.33-45
• /
• 2012

Purpose: The purpose of this study was to identify the role experience of preceptor nurses in general hospitals. Methods: Data were collected from 10 experienced preceptor nurses through in-depth interviews about their experiences. The main question was "How do you describe your experience as a preceptor in the process of role adaptation?" Qualitative data from field and transcribed notes were analyzed using Strauss & Corbin's grounded theory methodology. Results: The core category of experience in the process of role adaptation as a preceptor nurse was identified as 'being responsible to teach from beginning to end'. The participants identified five interactional strategies; 'abruptly having to take the role as a preceptor unwilling', 'difficulties in field training with variable situations', 'preceptor and new nurse with love and hate relationships', 'bring up preceptee as a child', 'redefining the concept of preceptor'. Conclusion: The results of this study provide useful information for understanding the role of preceptor nurses in general hospital who have to teach new nurses with patience and responsibility. It will be needed to establishment of preceptor's role and educational standards, and policy for their rewards by nurse manager. Additionally, making cooperative educational climate in nursing ward is important for teaching new nurse.