• Structural Engineering and Mechanics
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• v.53 no.2
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• pp.325-336
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• 2015

This paper presents a study based on the damage due to the fatigue life of thrust ball bearings using vibratory analysis. The main contribution of this work lies in establishing a relation between modal damping and the rolling contact fatigue damage of the thrust ball bearing. Time domain signals and frequency spectra are extracted from both static and dynamic experiments. The first part of this research consists in measuring the damping of damaged thrust ball bearings using impact hammer characterization tests. In a second part, indented components representing spalled bearings are studied to determine the evolution of damping values in real-time vibration spectra using the random decrement method. Dynamic results, in good agreement with static tests, show that damping varies depending on the component's damage state. Therefore, the method detailed in this work will offer a possible technique to estimate the thrust ball bearing fatigue damage variation in presence of spalling.

• Journal of the Korean School Mathematics Society
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• v.7 no.1
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• pp.121-138
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• 2004

For the efficient application of curriculum discretion activity, I developed the program, 'Let's go together', so that curriculum discretion activity can be applied in the classroom. The program consists of several experiences, which are <Man to man paired study>, <the learning materials for Mathematics in our lives>, <the cooperative study in the class> and <the variety experiences about Mathematics>. This study shows the following results: First, T-test about the students' learning attitude and interest in Mathematics, there was dramatic change in students' desire, interest and attitude for mathematics learning. Second, as the role of Baewomi & Dowomi in 'Man to man paired study', Baewomi & Dowomi provided students with confidence of mathematics learning. We were able to ensure this fact from students' essay after the class. Third, teachers found that the number of students who had positive attitude with Self-directed study increased. And students tried to solve mathematical problems by themselves and the time using self-directed learning experience was also increased. This study suggests that there needs more development for learning materials for mathematics in our lives.

• The Research Journal of the Costume Culture
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• v.4 no.2
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• pp.187-206
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• 1996

The Purpose of this study is to analyze the clothing excavated in Xinjinag, concerned with the study of clothing culture in Central Asia. The results are as follows : A headwear is a corn hat or round hat, the material is field, fur or woolen textiles. For hair accessories, feathers or wooden pins were used. The corn hats of the Scythians and the Huns also had same design and did not change even after being influenced from the culture of Han Dynasty. A woman's hair styles was many strips of braid, a man's hair style was a braid or a topknot. Regarding the clothing, a woman wore pull-over type and a man wore caftan for a jacket. Both a man and a woman wore widened coat and trousers as well as felt socks and leather boots, and longer socks than boots are the characteristics of the clothing of nomadic horsemen. The textiles was mainly wool, but silk was used for coats, socks and gloves in high society imported from China through the Silk Road after the 2nd century B.C. Compared with Korea clothing, a corn hat, widened coat, trousers and leather boots are similar with those of Koguryo. The influence of western culture is shown in a man's short hair, animal design, W1-Kum, a woman's pull-over type and a round neckline.

• Journal of Environmental Health Sciences
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• v.3 no.1
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• pp.4-8
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• 1976

Authors investigated the hematological examinations of 993 persons at rural region among the 1,7 41 of residents in-the part of Dang Jin (M:268, F:247) and Young Joo (M:270, F:208) in the Korea which was indicated as follows. 1. Average value and standard deviation of hematological items represents as follows: i) Hemoglobin Men Dang Jin-13.99$\pm$0.52. Man Young Joo-14.93$\pm$0.57 Women Dang Jin-12.56$\pm$0.38 women Young Joo-13.65$\pm$0.48 ii)Hematocrit Men Dang Jin-42.68$\pm$1.09 Man Young Joo-44.61$\pm$1.42 Women Dang Jin-38.16$\pm$0.93 women Young Joo-40.33$\pm$1.27 iii) Mean Corpuscular hemoglobin concentration Men Dang Jin-32.79$\pm$1.06. Man Young Joo-33.46$\pm$0.36 Women Dang Jin-32.92$\pm$0.75 women Young Joo-33.83$\pm$0.82 iv) WBC Men Dang Jin-7.130$\pm$880. Man Young Joo-7.490$\pm$910 Women Dang Jin-6.030$\pm$1.150 women Young Joo-7.320$\pm$1.040 2. The aspect of blood type at Young Joo and Dang Jin was same indicated in the order of A,O,B, and AB. 3. There are higher values of hemoglobin, hernatocrit, M.C.H.C. and WBC in men and women at Young Joo than Dang Jin.

• The Journal of Korean Medical History
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• v.25 no.2
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• pp.29-47
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• 2012

The Chimgeumdongin(鍼金銅人) is a Acupuncture Bronze Man that casted by Choe Cheonyak(崔天若) the meister and directed by O Jicheol(吳志哲) the royal chief acupuncture doctor of Chosen dynasty(朝鮮) in 1741. Choe Cheonyak casted the Chimgeumdongin at least 12 parts. After welding the parts, engrave the names of acupuncture point on it. It is suggested that there maybe one or more Wooden Acupuncture Man that remedy mistakes for a longtime before 1741. This became a prototype of Chimgeumdongin. The contents of Chimgeumdongin's acupuncture points are equal to which was recited by royal acupuncture doctors for hundreds years. Chimgeumdongin rigorously apply the bone proportional unit measurement of . and the range of error was between 0.01cm~1.67cm. Specially, they made it's head 1.34 times bigger, by long experience. Accoding to , the Chimgeumdongin was used for training inexperienced royal acupuncture doctors. As shown above, the Chimgeumdongin could be represents standard acupuncture technology of Chosen dynasty.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2014.10a
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• pp.785-788
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• 2014

Even though Korea is No.1 shipbuilding country around the world, there have been a lot of accident and man-made calamity incurring in shipyards these days. Therefore most of Korea major shipyard and mid-small size shipyard deeply agonize about safety management countermeasure. As a result of it, many shipyards pour their effort on developing man watching system, PF wireless communication system, portable measuring system to prevent from accident such as fire, suffocation incurring. In this paper, analyze conventional accident & man-made calamity preventing system adopted by most of shipyard and enable the user to watch accident for 24 hours and notify it to user when it is incurring through state of the art ICT technology. And as a result of it the user can prevent the accident and man-made calamity at the beginning.

• International Journal of Advanced Culture Technology
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• v.10 no.4
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• pp.337-344
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• 2022

The ecological expression of art in modern society takes the harmonious developmental relationship between man and nature as an element and combines it with the various manifestations of painting as an expression of ecological artistic development. The necessary relationship for the harmonious development of nature is accurately articulated, and the ecological changes in people are expressed in integrated materials that inspire human reflection. In the pursuit of material pleasures, mankind is neglectful and indifferent to the environment. The development of composite painting in art and ecology is a process that more reveres the harmony between man and nature as well as satisfying the creative value of the work. After systematic evaluation and research, people have engaged in various structural forms of composite art painting development in the long history of art development, focusing on the integration of environmental and ecological culture.In the process of nature education going through development, the comprehensive practical development of nature education is enhanced and efforts are made to feel new ecological art ideas and new ways of valuing environmental protection. In this paper, an observational study of eco-art will be carried out, starting from the theory of hierarchical division and analyzing the contradictory relationship between man and nature. Recognize nature, understand it and feel it through eco-art painting. The analysis of the contradictory relationship between man and nature is combined with the identification of various types of information that give value to the environmental protection public, and the combination of ecological painting and nature art to achieve an upgrade of the environmental protection idea of the value of painting.

• International Journal of Advanced Culture Technology
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• v.11 no.4
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• pp.352-357
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• 2023

This study focuses on the art style research of the 3D Animation <Spider-Man: Across the Spider-Verse>, exploring the film's innovation in art design. The article first analyzes how the movie skillfully blends American comics, watercolor painting style, Pollock drip painting, and ink painting, among other artistic techniques, to present a unique visual experience for the audience. By specifically dissecting the character design and scene composition in the movie, it explores the specific application of these art styles and their methods in digital image production. Ultimately, the paper emphasizes the contribution of <Spider-Man: Across the Spider-Verse> to 3D Animated cinema, particularly its innovation in the field of art design, as well as its inspiration and possibilities for the diversity of art styles in animated films. Overall, this study aims to provide in-depth academic insight into the field of animated film art design and to promote its development and innovation.

• Korean Journal of Human Ecology
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• v.7 no.1
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• pp.205-216
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• 1998

The objectives of this study were to investigate some problems related to health and to identify citizen's needs related to nutrition education program. The data were analyzed by using $x^2$-test, t-test, ANOVA and multiple range test. The food habits score was 70.0 of 100. The score of man was 69.0, while that of woman was 72.6. Since woman's food habit was better than man, education to man is more needed. Man's BMI was 22.5 and that of woman was 21.4. W/H ratio of man was 0.85 and that of woman was 0.80. BMI and W/H ratio increased as age increases. Systolic blood pressure was 123.5mmHg and diastolic blood pressure was 83.2mmHg. All age groups need the education of blood pressure control. Since subjects who did regular exercise were only 26.3%, these community people needed more regular exercise, specially woman. It turned out that subjects were afraid of cancer, hypertension, cerebral vascular diseases which are related with food habits. The disease or symptom having the highest mobility were dental disease, gastroenteric disorder, headache and constipation. They asked for counselling about health, diet therapy, protection methods of disease and menu planning etc. The program of education for health and good food habits should be developed according to subjects's age, sex, education etc. These results showed primary needs on the curriculum of citizen's education program for enhancing health. In addition, we suggest the research on the practical curriculum of nutrition education program.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.38B no.2
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• pp.154-161
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• 2013

This paper presents the signal-to-interference plus noise ratio (SINR) estimation of IEEE 802.16m WirelessMAN-Advanced mobile station with simulation and implementation results. The downlink signal of IEEE 802.16m has two kinds of A-Preambles: the PA-preamble and the SA-preamble. This paper proposes the efficient method of estimating SINR with A-Preambles, by measuring noise power from PA-preamble and measuring interference power and signal power from SA-preamble. The proposed SINR measurement block contains important features such as subcarrier phase rotation elimination and simplified dB transform. The result of this paper is integrated to ETRI's IEEE 802.16m test mobile station, used for decision of adaptive-modulation-and-coding (AMC) and hand-over. It showed good measurement performance in simulation and unified system link test also.