• Journal of the Korea Academia-Industrial cooperation Society
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• v.19 no.11
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• pp.357-369
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• 2018

This paper aims at understanding the conceptual definition and the characteristics of happiness of korean university students. We analyzed the data using Hybrid model introduced by Schwartz-Barcott and Kim. The data was conducted from June, 2018 to July 2018. The participants in this study were 13 and an another part of the data was obtained from literatures regarding happiness of university students. We categorized Happiness of korean university students into eight attributes in four dimensions. In other words, The concept of happiness on korean university students is as follows: (i) Satisfaction of Individual's subjective, (ii) Satisfaction of Individual's objective, (iii) Achievement of goal, (iv) A positive cognition for the future, and (v) Relationship satisfaction from meaningful person, (vi) Physical and mental well-being of oneself and meaningful person, (vii) Satisfaction of everyday life, (viii) Satisfaction of college life. The major contribution from this paper is that we provide a guideline for establishing a strategy to reduce negative emotions and increase happiness of university students in korea by identifying the concept of Happiness on Korean university students. Based on this study, we recommend to develop an educational program to increase happiness of university students in korea.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.20 no.8
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• pp.425-430
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• 2019

Zinc coatings are widely used because of their environmental friendliness and high performance. In general, the coating temperature is a major factor in determining the coating layer thickness and coating quality. In the case of a zinc coating, a uniform and appropriate coating temperature is required. In this study, a thermal flow simulation of the air flow was performed to analyze the temperature distribution of a zinc spray coating room in a natural convection state. Using SolidWorks, modeling was performed for two spray coating rooms, a preheating room, and a drying room, and a thermal flow coupled analysis was performed using ANSYS-FLUENT. As a result of the analysis, the temperature distribution characteristics in the spray coating rooms were determined. It was found that the present temperature was below the target temperature of $25^{\circ}C$. Simulations were conducted for two different boundary conditions (one with a heater added and another with the open part closed). The simulation results show that the method of closing the open part is better than adding the heater.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.20 no.6
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• pp.579-586
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• 2019

The object of this study are 32 floor plans types of "Standard Korea Traditional-Houses Design=SKTHD.". The purpose of the research was to enhance the satisfaction level of users by comparing and analyzing the characteristics of the SKTHD. Research decision : 1. It tried to accommodate modern life by including space elements of modern housing, such as the 'entrance space', in the SKTHD. 2. The SKTHD. also favored the southern layout of living rooms and entrance spaces. 3.The number of bedrooms was generally planned to be two to three and it was judged that more various space and bedroom were needed to hold various functions of rural areas. 4. It has been analyzed that the depth of space is deeper to enter the entrance space(E)' than to enter from Thet-maru(TM). And as the depth of space in the Master bedroom is related to personal privacy, it is needed that the depth of space should be sufficiently.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.20 no.1
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• pp.284-289
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• 2019

The Korea Foldable safe pathway system is an evacuation support system to get temporary evacuation route in railway tunnel and large space fires. A prevention smoke screen is unfolded in fires and it is needed to prevent heat and smoke from fire source. Therefore, ventilation system for positive pressure condition is equipped with foldable safe pathway system. Numerical analyses of temperature and pressure distribution with distance from fire source were performed considering fire scenario of new train vehicle. The smoke temperatures did not exceed $200^{\circ}C$ that distance from the fire source was more than 20 m and smoke pressure was reduced with distance from fire source. Maximum smoke pressure was 14 Pa and average pressure was 6 Pa in position of prevention smoke screen. As results, to install foldable safe pathway system, ventilation system is need to maintain 6 Pa positive pressure condition.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.20 no.4
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• pp.336-344
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• 2019

The Ministry of Education (2015) announced the "2015 Revised Curriculum for Elementary and Secondary Schools" and announced that SW (Software) training for elementary and junior high school students to develop Computational Thinking will be gradually introduced from 2018. In addition, 'problem solving' and 'programming' have become important areas. Furthermore, the ability to analyze and utilize big data is becoming more emphasized. We developed and applied the statistical - Python programming convergence curriculum based on the idea that convergence education combining information and mathematics, programming and statistical literacy is needed according to current trends. Before and after the experiment, problem solving ability test and programming / mathematical interest test were conducted and compared with the corresponding sample t-test. According to the analysis results, there were significant differences in the pre- and post-test on problem solving ability, programming interest and mathematical interest at the significance level of 0.05.

• Journal for History of Mathematics
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• v.20 no.4
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• pp.1-21
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• 2007

We investigate the Gou Gu Shu(句股術) in Hong Jung Ha's Gu Il Jib(九一集) and Cho Tae Gu's Ju Su Gwan Gyun(籌書管見) published in the early 18th century. Using a structural approach and Tien Yuan Shu(天元術), Hong has obtained the most advanced results on the subject in Asia. Using Cho's result influenced by the western mathematics introduced in the middle of the 17th century, we study a process of a theoretical approach in Chosun mathematics in the period.

• The Journal of Korean Society for School & Community Health Education
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• v.19 no.3
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• pp.65-77
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• 2018

Background & Objectives: This study aims to investigate the health status of family caregivers with dementia patients and identify the factors related to their anxiety and depression. Methods: Data from 2015 Community Health Survey(n=2,426) was used. A chi-square test was performed to investigate the health status of family caregivers, and a multiple logistic regression analysis was used to identify the factors associated with anxiety and depression. Results: Odds ratio(OR) of anxiety and depression was 1.29 times higher in female, 2.49 times higher in over 70 years versus under 39 years. ORs were lower 34.0%, 26.0%, 26.0% in the working group, the physical activity group, the alcohol drinking group respectively. ORs of anxiety and depression were 4.54 times, 1.57 times higher in the stress group, the chronic disease group respectively. And ORs were 61.0%, 28.0% lower respectively when social networks and social activities was present. Conclusions: The rate of experiencing anxiety and depression was high in family caregivers with dementia patients. It is necessary to provide diverse programs to reduce the burden of family support, anxiety and depression of family caregivers.

• Journal for History of Mathematics
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• v.24 no.2
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• pp.1-15
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• 2011

Approximation is a very useful approach in mathematics research. It was the same in traditional Chinese and Chosun mathematics. This study derived five characteristics from approximation approaches which were found in Chinese and Chosun mathematical books: improvement of approximate values, common and inevitable use of approximate values, recognition of approximate values and their reasons, comparison of their exactness, application of approximate principles. Through these characteristics, we can infer what Chinese and Chosun mathematicians recognized approximate values and how they manipulated them. They took approximate approaches by necessity or for the sake of convenience in mathematical study and its applications. Also, they tried to improve the degree of exactness of approximate values and use the inverse calculations to check them.

• Journal for History of Mathematics
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• v.21 no.4
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• pp.153-168
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• 2008

This study investigates how high achievers solve a given mathematical problem. The problem, which comes from 'SanHakIbMun', a Korean mathematics book from eighteenth century, is not used in regular courses of study. It requires students to determine the area of a gnomon given four dimensions(4,14,4,22). The subjects are 84 sixth grade elementary school students who, at the recommendation of his/her school principal, participated in the mathematics competition held by J university. The methods used by these students can be classified into two approaches: numerical and decomposing-reconstructing, which are subdivided into three and six methods respectively. Of special note are a method which assumes algebraic feature, and some methods which appear in the history of eastern mathematics. Based on the result, we may observe a great variance in methods used, despite the fact that nearly half of the subject group used the numerical approach.

• (The)Study of the Eastern Classic
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• no.70
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• pp.91-117
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• 2018

This paper examines the persuasive style(論說類) proses of Myeonggog(明谷) Choi, seokjeong(崔錫鼎, 1646~1715). He is a disciple of Namguman(南九萬) and Parksechae(朴世采), and is a man who played an active part by political soron(少論) leader in the middle of the Joseon Dynasty. It is also a central figure that links the genealogy of the late Joseon Dynasty, which leads to Namguman(南九萬)-Choiseokjeong(崔錫鼎)-Chotaeeok(趙泰億). He wrote total 14 persuasive style prose. The time of creation is from around 1671 until the end of life. In this paper, the preoses to be analyzed are Sunukron(荀彧論), Bujadaegaron(夫子待賈論) and Muneongyebyeon(文言系辭辨). The reverse idea that reverses the existing discussion is outstanding, and the work which is unique in composition is Sunukron(荀彧論). Bujadaegaron(夫子待賈論) is a work that uses the ryubi(類比) to increase persuasiveness and converts the existing perspective. Muneongyebyeon(文言系辭辨) is a work that attempted to harmonize in the formality of vocabulary, sentence and composition while showing the logical perfection to dismiss the counter-argument's prerequisite. For example, Muneongyebyeon(文言系辭辨) consists of a total of five paragraphs in aspect of composition, each paragraph arranged in good order. In addition, this work presented sequential arguments, used the incremental method which emphasizes the importance of arguments as it moves backward.