• Journal of Environmental Science International
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• v.26 no.12
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• pp.1389-1397
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• 2017

In this study, we calculated the fixed-type Areal Reduction Factor (ARF) of the Hancheon River basin in Jeju Island, and compared the calculated ARF and the ARF of the four major river basins suggested by the Ministry of Land, Infrastructure and Transport. As a result, the maximum fluctuation ratios of ARF for the four major river basins calculated using area, frequency, and initial duration time were significant: 7.61% for the Hangang River basin; 12.69% for the Nakdonggang River basin; 8.09% for the Kumgang River basin; and 17.98% for the Yeongsangang River basin. In addition, the differences between the maximum and minimum value of ARF for the Hancheon River basin based on 48 hours was 2.13%, and it was smaller than the one for the four major river basins: 8.92% for the Hangang River basin; 11.41% for the Nakdonggang River basin; 8.87% for the Kumgang River basin; and 17.17% for the Yeongsangang River basin. The Yeongsangang River basin had the highest difference.

• Journal of The Korean Association For Science Education
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• v.19 no.4
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• pp.585-594
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• 1999

The purpose of this study is to examine the concept of Greenhouse Effect as understood by middle school high school university students using a closed-form questionnaire. Based on results of the questionnaire which was administered to 619, the extent to which alternative concepts were held was quantified and compared the difference of various group based on grade level. gender, text and major. Also, subjects were divided into two groups, one is middle school students and the other is high school university students and common themes within conceptual framework of each group were identified by factor analysis. The result showed that students confused Greenhouse Effect with ozone layer depletion in stratosphere and linked familiar contamination around everyday life. acid rain. radioactive contamination, nuclear arsenal to Greenhouse Effect. These trends were more appreciable in female than male, biology major than any other major and text did not make any significant difference. In addition, the result of factor analysis showed that two groups linked familiar contamination around everyday life to Greenhouse Effect and high school university students understand the consequences of an increase in the Greenhouse Effect more systematically than middle school student, perceived the relation between the origin of an increase in the Greenhouse Effect and human activity but confused Greenhouse Effect with ozone layer depletion in stratosphere.

• The Journal of Korean Physical Therapy
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• v.14 no.2
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• pp.107-115
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• 2002

This study was performed to investigate the effect of ultrasound irradiation on epidermal growth factor(EGF) expression in rat wound tissue. Skin wounds were created below 5mm to both sides of scapular inferior angle. The right wound was used experimental side and left was used control side. Ultrasound was irradiated pulse rate $20\%$, frequency 1MHz, intensity $0.5W/cm^2$ for 5 minutes during 3days. After sonication during 3 days, rats were sacrified. The expression of epidermal growth factor evaluated immunohistochemistry on mouse anti-EGF. In the control side, a little expression of EGF was observed at epidermis and dermis. In the experimental side, A strong immunostaining was seen at epidermis and dermis. This study suggests that ultrasound irradiation is effective on EGF expression in wound tissue.

• Korean Security Journal
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• no.14
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• pp.431-447
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• 2007

The purpose of this study was to investigate the An analysis on the physical strength factor of the Collegians majoring in Security Services. In order to accomplish this purpose, subjects of this study were 80 person J university student men. Physical fitness tests was grip strength, back strength, sit-ups, stand long jump, 50m run, side step test, shuttle run, 2000m run, standing trunk flexion, and closed eye foot balance. Factor analysis applied for analysis factorial structure of each physical fitness components. The results of this study were as follow; First, the factor affecting the performance of the Collegians majoring in Security Services of their was appeared with the Power, Balance and Strength. Second, the factor affecting the performance of the Collegians majoring in Security Services of their was appeared with the Taekwondo major group with the Balance, Power, Strength and Cardiovascular Endurance. Third, the factor affecting the performance of the Collegians majoring in Security Services of their was appeared with the Judo major group with the Power, Flexibility and Strength. Fourth, the factor affecting the performance of the Collegians majoring in Security Services of their was appeared with the Hapkido major group with the Muscular Endurance, Strength, Cardiovascular Endurance and Flexibility. Fifth, the factor affecting the performance of the Collegians majoring in Security Services of their was appeared with the Gumdo major group with the Cardiovascular Endurance and Power.

• Journal of Korean society of Dental Hygiene
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• v.10 no.5
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• pp.887-895
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• 2010

Objectives : In this study, 233 dental hygiene students in Seoul and Gyeonggi areas were surveyed in order to provide the basic data for more effective clinical practice by investigating the stress they experience during the clinical practice and how they cope with stress; Methods : 5 areas in stress factors as environmental factor, interpersonal factor, role and activity, ideal and value, and the amount of BEPSI and 4 areas in their coping methods as problem-oriented, social support, emotion-oriented, and wishful thinking were measured by Liker 5-point scale. Results : 1. The satisfaction level of subjects on their major was the highest as 'generally satisfied (50.6%),' and their satisfaction level of clinical practice was also the highest as 'generally satisfied (32.6%).' 2. The clinical practice stress was 2.76 points on average, and their stress factors were ideal and value (3.18), environmental factor (2.98), role and activity (2,70), the amount of BEPSI (2.55), and interpersonal factor (2.37). And the way how they cope with stress were 3.29 points on average, wishful thinking (3.71), social support (3.36), problem-oriented (3.13), and emotion-oriented (2.95). 3. The clinical practice stress according to clinical training institutions showed significant differences: university dental hospitals and general hospitals (2.83), dental clinics (2.65), and dental hospitals (2.63). 4. The clinical practice stress showed a negative correlation between the satisfaction level of major and the satisfaction level of clinical practice (p<0.01), and the more satisfaction they had in their major and clinical practice, the less stress during the clinical practice. 5. In the correlation between each subordinate factor of the stress in clinical practice and how to cope with it, interpersonal factor and emotion-oriented factor, the amount of BEPSI and wishful thinking showed a positive correlation (p<0.05). Conclusions : In this study, it is necessary to develop clinical practice program that is to increase satisfaction and provide motivation in order to reduce the stress during clinical training.

• Journal of the Korean Society of Clothing and Textiles
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• v.26 no.8
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• pp.1141-1152
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• 2002

This study examined the life style of Korean-Chinese co]loge students in YnBian region of China and analyzed the purchasing behavior of clothing according to the life styles. The sample consisted of 296 undergraduate students of the YanBian University in China. The Questionnaires were used to collect the data and the data were analyzed by Sequency, factor analysis, cluster analysis, $X^{2}-test$ and ANOVA. The major results were as follows : 1) Results of factor analysis showed that life styles of the respondents could be classified into 5 factors: the ostentatious sense factor, positive activity factor, circumspective economy factor, self-repletion factor and information conformity factor. 2) The respondents were divided into five groups according to the life styles; active shoppers, conspicuous compulsives, economic planners, self indulgers, and conspicuous planners. 3) Evaluative criteria in purchasing clothing, information sources and store patronage, differed among the five consumer groups. Especially, the conspicuous planners group differed from other groups in al1 aspects. 4) Gender, major, income and allowance were not significantly different among the groups. But, there were more one-child respondent in the ostentatious planned group, while planned consumer group had more respondents who were not one-child in their families.

• Journal of Korean Society for Quality Management
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• v.38 no.3
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• pp.449-462
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• 2010

In this Paper, We analyzed influence Factor to TPM Performance in medium and small enterprises by empirically. By Literature survey, We hypothesize education training and 5S influence to individual improvement, independence maintenance, planning and foresight, which also influence to flexibility, total equipment performance, quality, which finally influence to lower cost, delivery date. To analyze empirically, we survey questionnaire in medium and small enterprises being below 300 people. From statistical analysis, 7 hypotheses are rejected, which is different existing research. This is analyzed that reflect actuality that medium and small enterprises is different from large enterprises. We expect that result of this treatise does concentration effort in important factor to get TPM performance in medium and small enterprises.

• Wind and Structures
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• v.37 no.2
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• pp.117-131
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• 2023

Korea Design Standard (KDS) will be updated with two major revisions on the assessment of wind load and performance-based wind design (PBWD). Major changes on the wind load assessment are the wind load factor and basic wind speed. Wind load factor in KDS is reduced from 1.3 to 1, and mean recurrence interval (MRI) for basic wind speed increases from 100 years to 500 years considering the reduction of wind load factor. Additional modification is made including pressure coefficient, torsional moment coefficient and spectrum, and aeroelastic instability. Combined effect of the updates of KDS code on the assessment of wind load is discussed with the case study on the specified sites and building. PBWD is newly added in KDS code to consider the cases with various target performance, vortex-induced vibration, aeroelastic instability, or inelastic behavior. Proposed methods and target performance for PBWD in KDS code are introduced.

• Proceedings of the KSR Conference
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• 2005.05a
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• pp.308-313
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• 2005

An urban railway vehicle has a characteristics such as that a lot of passenger use it and the major of passenger is standee. The ride comfort of standee is greatly influenced by the lateral dynamic characteristics of vehicle. So the lateral vibration is important factor for the improvement of ride comfort. In this study, vibration test of railway vehicle is carried out under the same condition of field driving to find out the major factor of vibration. By considering the test results under the various driving condition, the vibrational characteristics of vehicle is verified.

• Korean Journal of Human Ecology
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• v.16 no.1
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• pp.111-121
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• 2007

The purpose of this study was to examine university students' clothing and cosmetics purchasing behaviors according to gender and major. For the study, 337 university students living in Chonbuk area participated in this survey research. The data were analyzed utilizing SPSS statistics package. Exploratory factor analysis, reliability test, and t-test were used. Five factors in each clothing and cosmetics purchasing orientation were generated from the factor analysis. According to gender and major, clothing and cosmetics purchasing behavior were significantly different. Female students showed more impulsive, rational, and economical purchasing orientations than male students did. On the contrary, male students showed more independent and convenient purchasing orientations. The students with fashion design major showed higher tendency in impulsive and rational clothing purchasing orientations than non-fashion design major students. Finally, clothing and cosmetics purchasing behaviors were significantly different by gender and major in terms of information usage and expenditure for clothing and cosmetics.