• Genomics & Informatics
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• v.12 no.3
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• pp.127-133
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• 2014

Gastritis is a major disease that has the potential to grow as gastric cancer. Gastric cancer is a very common cancer, and it is related to a very high mortality rate in Korea. This disease is known to have various reasons, including infection with Helicobacter pylori, dietary habits, tobacco, and alcohol. The incidence rate of gastritis has reported to differ between age, population, and gender. However, unlike other factors, there has been no analysis based on gender. So, we examined the high risk factors of gastritis in each gender in the Korean population by focusing on sex. We performed an analysis of 120 clinical characteristics and genome-wide association studies (GWAS) using 349,184 single-nucleotide polymorphisms from the results of Anseong and Ansan cohort study in the Korea Association Resource (KARE) project. As the result, we could not prove a strong relation with these factors and gastritis or gastric ulcer in the GWAS. However, we confirmed several already-known risk factors and also found some differences of clinical characteristics in each gender using logistic regression. As a result of the logistic regression, a relation with hyperlipidemia, coronary artery disease, myocardial infarction, hyperlipidemia therapy, hypotensive or antihypotensive drug, diastolic blood pressure, and gastritis was seen in males; the results of this study suggest that vascular disease has a potential association with gastritis in males.

• The Journal of Korean Society for School & Community Health Education
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• v.11 no.1
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• pp.93-115
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• 2010

Objectives: This study intends to understand the difference of social support levels and the relationship between social support the health status, college adjustment and academic achievement in the college student. Methods: Data were obtained from self-administered questionnaire of 416 college student. We measured the demographic characteristics, social support (tangible support, appraisal support, belonging support, self-esteem support), health status (36-item short-form health survey(SF-36), center for epidemiologic studies-depression(CES-D), perceived stress scale(PSS)), student adaptation to college questionnaire(SACQ), average grades point. Chi-square test, t-test, ANOVA test, pearson correlation analysis were used for analysis factors relation of the social support of the college students. Results: In considering the degree of social support by the demographic characteristics in the college students, the social support was better for the female college students. In considering the relation between social support and health status, the students who get better social support, were good in health depression and perceived stress status. When they got better social support their college adjustment and academic achievement were good. The result was statistically significant. Conclusions: Social support for students has great influence on health, college adjustment and academic achievement of students. Psychological aspects of students should be included in the strategy of social support for students.

• Journal of the Korean Society for Railway
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• v.15 no.1
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• pp.23-28
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• 2012

In this paper, noise of Korean high-speed trains (KTX) running at different speed from 150 to 300km/h was measured by a microphone array system. From the measurement, relation between maximum sound pressure levels and train moving speeds of KTX was drawn and a regression coefficient from the relation was also derived. Moreover, increases of SPL with speeds of KTX were analyzed in the frequency domain. From the analysis, sound characteristics of passing-by noise of KTX were provided. Then, dominant noise source areas were obtained from the measurements and propagation patterns of KTX in vertical direction were also investigated. Finally, noise sources of KTX were identified from inspection of noise maps.

• Journal of Korea Game Society
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• v.21 no.2
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• pp.111-122
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• 2021

MMORPG game is an industry that is growing fast through COVID-19. This study confirmed the factors that influence the self-character identification and social relation internalization of MMORPG games and identified the factors that affect the intention to purchase items and the intention to continue play. According to the PLS analysis, the influence of the character characteristics and social characteristics of MMORPG on self-character identification and game commitment was significantly confirmed. In addition, the relationships between these mediating variables and user behavior were tested. The results of this study suggested the importance of researching MMORPGs' game characters and could be used to improve the competitiveness of MMORPG game companies.

• Journal of the Korean Institute of Telematics and Electronics A
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• v.32A no.7
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• pp.51-57
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• 1995

The theoretical analysis for AlInAs/GaInAs resonant tunneling diodes (RTDs), which have shown the improved negative differential resistance (NDR) characteristics, has scarcely been made in comparison with AlGaAS/GaAs RTDs. In this paper, the static current-voltage relation of Al$_{0.48}In_{0.52}As/Ga_{0.47}In_{0.53}$As RTDs were numerically estimated by using a self-consistent method. Assuming a simplified RTD with single quantum well structure and spacer layers, the peak current density (J$_{P}$) and the peak-to-valley current ratio (PVCR) were analysed as the function of the thickness of the well, the barrier and the spacer layer, and temperature. As the results, the peak current density and the peak-to-valley current ratio indicated a reciprocal relation roughly in respect to the thicknesses of the well and the barrier, and it was theoretically predicted that it be not attainable to provide a high peak current desity (J$_{P}$) over 1${\times}10^{5}A/cm^{2}$ as well as the large peak-to-valley current ratio (PVCR) over 10 that were the the critical conditions for the practical use.

• Journal of the Korean Society of Hazard Mitigation
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• v.4 no.2 s.13
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• pp.35-45
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• 2004

Recently, the composite material becomes more popular and its usage is kept expanding from aerospace to civil structures such as bridge decks and irrigation and drainage pipes. The major cause for the popularity can be found in its high strength, light, and excellent anticorrosive properties. Nevertheless the methods to accurately predict and analyze its structural behavior are extremely limited. This has been the major reason circumventing more prevalent use of the composite materials in civil structures. This study is a pre-study to develop the analyzing models for accurate prediction of the composite material structures. Thus, various tests were performed for GFRP pipes to estimate material characteristics of GFRP in this study. And stress-strain relation of GFRP was suggested as a bilinear relation.

• The Journal of the Korea Contents Association
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• v.8 no.12
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• pp.81-90
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• 2008

The development of digital technologies has changed the paradigm of an information-oriented society. Accordingly, the media-art and the net-art using digital media have been developed more interactively. Under the this influence, various experimental works using digital media are being produced and having a try to combination of art and digital on the network. In this paper, we looked into the relation between characteristics and playful of the net-art and analized the relation among interactive, network characteristics and intuitive play implemented on the net-art. Based upon these analyses, we intend to offer new aesthetic experiences through playful expression for humorous emotion on a traditional character, Dokkaebi.

• Journal of Korean Academy of Nursing Administration
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• v.6 no.1
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• pp.5-18
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• 2000

This study was conducted to analyze the degree of department satisfaction and correlation accordng to nurses's clinical characteristics. Data fors tudy were selected August, 1999. The sample coisted of 512 nurses working in K university hosptal in Seoul. The collected materials have been alyzed by percentage, average, t-test, ANOVA, arson Correlation Coefficiency using SPSS window 8.0 program. The result were as the follows ; 1. Fifty-one percent answered to be satisfactory in current department of work, and nurses who had been experienced the transfer are fifty percent, and nurse specialist is eight point two percent. 2. The order of the degree of department duty satisfaction was mutual action, professinal position, autonomy, assignment desire, relation between the doctor and nurses, wage, administration. 3. The result of the degree of department duty satisfaction according to the age has shown significant differences in administration and assignment desire, and the result of the degree of department duty satisfaction according to the education and religion has shown significant differences in administration, and the result of the degree of department duty satisfaction according to marital status has shown significant differences in wage and administration. 4. The result of the degree of department duty satisfaction according La the position has shown significant differences in administration, assignment desire and the sum of duty satisfaction, and the result of the degree of department duty satisfaction according to the nurse specialist has shown no significant differences in total areas, and the result of the degree of department duty satisfaction according to the transfer has shown significant differences in relation between the doctor and nurses, administration, autonomy and the sum of duty satisfaction. 5. The result of the degree of department duty satisfaction according to the nursing career and present assignment career has shown no significant differences in total areas, and the result of degree of department duty satisfaction according to the present assignment has shown significant differences in relation between doctor and nurses, administration, assignment desire and the sum of duty satisfaction. 6. The result of the degree of department duty satisfaction according to the request and experiences of trasfer has shown significant differences in wage, administration, assignment desire and the sum of duty satisfaction 7. The result of the degree of department duty satisfaction according to the degree of satisfaction of present assignment has shown no significant difference in professional position 8. The result of relation of nurses'a clinical characteristics and the degree of department duty satisfaction and the sum of duty satisfaction has shown no significant differences in age, present assignment career, but the result of nursing career has shown significant differences in relation between doctor and nurse, administration, autonomy, assignment desire and the sum of duty satisfaction. and the satisfaction of present assignment which was very effective on duty satisfaction was as significant correlation with wage, professinal position, relation between doctor and nurses, administration, autonomy assignment desire, mutual action and the sum of duty satisfaction. The above result show us that the degree of wage is effected on marital status, experience of transfer, degree of satisfaction of present assignment, request of transfef and the relation between doctor and nurses is effected on experience of transfer, present assignment, degree of satisfaction of present assignment and the administration is effected on age, education, marital status position, experiences of transfer, request of transfer, degree of satisfaction of present assignment and the autonomy is effected on experience of transfer, degree of satisfaction of present assignment and the assignment desire is effected on position, pre sent assignment, degree of satisfaction of present assignment, request of transfer and the mutual action is effected on present assignment. and the sum of duty satisfaction is effected on marital status, position, experience of transfer, request of transfer, present assignment, degree of satisfaction of present assignment.

• Proceedings of the Korean Society of Agricultural Engineers Conference
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• 1998.10a
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• pp.269-278
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• 1998

The Planning characteristics of the canals linking river basins and estuary reservoirs have been reviewed in relation to the trend widening the areas of water resources planning. It has been also tried to justify the characteristics of the link canals in the history of irrigation development. It was concluded that the link canals were resulted from the most recent technology as far as irrigation systems were concerned, why these were long- and large-scale multipurpose canals ； the hydraulic heads of the link canals could be controlled easily ； and which consisted of open channels, pipelines and control reservoirs. The types and general characteristics of the canals have been reviewed, and the fundamental concept and characteristics in the planning of the canals have been described.

• Transactions of the Korean Society of Automotive Engineers
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• v.12 no.2
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• pp.101-108
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• 2004

Recently, a semi-active shock absorber has been taking interest because of its low cost and simple structure than the active one. CFD analysis has been conducted to investigate the continuous and variable damping characteristics of the semi-active shock absorber. Also, the flow resistance characteristics of a spool valve has been examined to identify individual parameters(namely, exponent and discharge coefficient) of pressure-flow rate relation needed for the accurate valve modeling. The flow field in the damping valve was simulated using the commercial code, CFX-5.3. The numerical results showed reasonable agreement with the experimental outputs. The pressure distribution with the variation of spool opening length and volume flow rate were discussed in detail. And the continuous and variable damping performance was found clearly. The individual parameters of spool valve were obtained as a function of orifice area. The exponent and discharge coefficient were fitted in with the first and the third polynomial respectively.