• The Journal of the Korea Contents Association
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• v.17 no.7
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• pp.56-66
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• 2017

This study is a descriptive research study conducted to investigate the influence of fear of evaluation and test anxiety on social anxiety among nursing students. The subjects were 383 nursing students in a university and surveyed the structured questionnaires for evaluation fear, test anxiety and social anxiety from June to July 2015. As a result, it was found that fear of positive evaluation, fear of negative evaluation and test anxiety were found to affect social anxiety, and these variables predicted social anxiety of nursing students by 30%. The social anxiety of nursing students verified differences according to the economic condition, satisfaction of major in nursing, and academic stress, and that there was a positive correlation between fear of positive evaluation (r=.45, p<.001), fear of negative evaluation (r=.29, p<.001) and test anxiety (r=.29, p<.001). This study is significant in that fear of evaluation and test anxiety of nursing students are verified to be factors affecting social anxiety. We suggest that a social anxiety intervention program be developed and applied for nursing students. Also, it is necessary secure a strategy to apply the intervention program by screening social anxiety of nursing students in advance.

• Science of Emotion and Sensibility
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• v.22 no.3
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• pp.3-20
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• 2019

With advancements in technology of virtual reality, it is used for various purposes in many fields such as medical care and healthcare, but as the same time there are also increasing reports of nausea, eye fatigue, dizziness, and headache from users. These symptoms of motion sickness are referred to as cybersickness, and various researches are under way to solve the cybersickness problem because it can cause inconvenience to the user and cause adverse effects such as discomfort or stress. However, there is no official standard for the causes and solutions of cybersickness at present. This is also related to the absence of tools to quantitatively measure the cybersickness. In order to overcome these limitations, this study proposed quantitative and objective cybersickness evaluation method. We measured 128-channel EEG waves from ten participants experiencing visually stimulated virtual reality. We calculated the relative power of delta and alpha in 11 regions (left, middle, right frontal, parietal, occipital and left, right temporal lobe). Multiple regression models were obtained in a stepwise manner with the motion sickness susceptibility questionnaire (MSSQ) scores indicating the susceptibility of the subject to the motion sickness. A multiple regression model with the highest under the area ROC curve (AUC) was derived. In the multiple regression model derived from this study, it was possible to distinguish cybersickness by accuracy of 95.1% with 11 explanatory variables (P_D.MF, P_D.LP, P_D.MP, P_D.RP, P_D.MO, P_A.LF, P_A.MF, P_A.RF, P_A.LP, P_A.RP, P_A.MO). In summary, in this study, objective response to cybersickness was confirmed through 128 channels of EEG. The analysis results showed that there was a clearly distinguished reaction at a specific part of the brain. Using the results and analytical methods of this study, it is expected that it will be useful for the future studies related to the cybersickness.

• Journal of Internet Computing and Services
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• v.10 no.1
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• pp.145-158
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• 2009

No other change in Kora has offered gredter chalenges and opportunities than the emergence of the Internet and its related Information Technology. In the technology for accessing the ever growing wave of information. The quality of the silver generation is increasingly difficult to achieve because of the complexities of life in today's ICT(Information & Comunication Technology) dependent society, Life is more interesting when one knows what is going on, what opportunities exist, and when alternatives to current practices can be discovered and utilized with ease. The purpose of this study is to identify the determinants of attitude and planned behavior toward using internent for the quality of life. This study employ the intention to use internet, perceived ease of use, perceived usefuiness, self-efficacy, stress factor, generation gap, and income as major research variables, and collected 288 survey responses from senior citizen over 55. The results indicate that the perceived usefuiness and ease of use influence the intention to use internet, and that the self-efficacy, the ease of use and generation gap has some impact on the attitude, but the stree factor and the income level do not appear significant to the attitude. It was also found that the self-efficacy and the income level determine the level of ease of use. In addition, some useful suggestions concerning the continuing education program for silver generations are presented.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.21 no.2
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• pp.578-587
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• 2020

The purpose of this study was to provide information to prevent and manage the risk factors of adolescent health behavior by identifying the relationship between smartphone use and the intake of sugar-sweetened beverages of Korean adolescents. Data from the 2017 Korean Youth Risk Behavior Survey of 54,603 adolescents was used for this study. The study examined the variables related to general characteristics, smartphone use, and intake of sugar-sweetened beverages. Complex sample analysis was done by performing multivariate logistic regression analysis. Smartphone usage time (aOR = 2.19, 95%CI = 2.05-2.34) and smartphone use for communication (aOR = 1.51, 95%CI = 1.43-1.60) were associated with three or more times per week of SODA beverage intake. In addition, adolescents who experienced conflicts with family were associated with SODA beverage intake (aOR = 1.42, 95%CI = 1.33-1.51), conflict with friends was associated with sweet beverage intake (aOR = 1.39, 95%CI = 1.30-1.49), and study problems were associated with SODA beverage intake (aOR = 1.79, 95%CI = 1.54-2.07). Therefore, controlling the use of Smartphones in schools and homes and creating an environment in which communication skills can be learned can help adolescents reduce the intake of sugar-sweetened beverages. Positive relationships with family and friends, and appropriate management of academic stress can help reduce inappropriate health behaviors associated with smartphone use by adolescents.

• The Journal of the Korea Contents Association
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• v.8 no.3
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• pp.225-233
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• 2008

The purpose of this study is to investigate the relationship between leisure motives of private guards and their sports participation, verify the casual relationship between its variables, and finally present the need of leisure activities for them and related politic data. The subjects are the private guards who work for a private guard company in Seoul in 2007, Except the data having inadequate answers among the 200 copies which are collected by stratified cluster random sampling, the data of total 193. The result of reliability analysis check up was here below; Chronbach's ${\alpha}= .835$. SPSSWIN 15.0 program is used for the reliability and correlation analysis of the questionnaire. The followings are the conclusions from this investigation through above methods and procedures. First, leisure motives affect the experience of sports participation; the more relaxational motives are, the less the experience of sports participation is. Second, leisure motives affect the degree of sports participation; the more motives of recognizing competence are, the more the frequency of sports participation is; the more intellectual motives are, the longer the period of sports participation is; the more relaxational motives are, the less the intensity of sports participation is, while the more motives of recognizing competence are, the more the intensity of sports participation is.

• Journal of Korean Tunnelling and Underground Space Association
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• v.4 no.4
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• pp.277-286
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• 2002

Most of the problems in dealing with the tunnel construction are the uncertainties and complexities of the stress conditions and rock strengths in ahead of the tunnel excavation. The limitations on the investigation technology, inaccessibility of borehole test in mountain area and public hatred also restrict our knowledge on the geologic conditions on the mountainous tunneling area. Nevertheless an extensive and superior geophysical exploration data is possibly acquired deep within the mountain area, with up to the tunnel locations in the case of alternative design or turn-key base projects. An appealing claim in the use of artificial neural networks (ANN) is that they give a more trustworthy results on our data based on identifying relevant input variables such as a little geotechnical information and biological learning principles. In this study, error back-propagation algorithm that is one of the teaching techniques of ANN is applied to presupposition on Rock Mass Ratings (RMR) for unknown tunnel area. In order to verify the applicability of this model, a 4km railway tunnel's field data are verified and used as input parameters for the prediction of RMR, with the learned pattern by error back propagation logics. ANN is one of basic methods in solving the geotechnical uncertainties and helpful in solving the problems with data consistency, but needs some modification on the technical problems and we hope our study to be developed in the future design work.

• The Korean Journal of Quaternary Research
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• v.13 no.1
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• pp.25-33
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• 1999

The relationships between climate (monthly precipitation and temperatures) and tree-ring growth of Korean fir (Abies koreana) growing at subalpine (1,600∼l,700m) zone on the south slope, Joong-Bong and the north slope, Changgun-Bong in the Cheonwang-bong area in Chiri mountains in the southern Korea were analyzed. Two cores from each of 10∼12 trees were extracted. The relationship between tree-ring(standardized) chronologies and climate was analyzed by the response-function method. Climate variables could explain 45.9∼53.8% of total variance in the chronologies. The precipitation response function of Korean fir were similar at both sites in overall ; positive for March∼May and August, and negative for February and July. The south-slope fir of Joong-Bong possessed higher negative temperature response function for February and August than north-slope one. The positive response function for April temperature was significant for both sites. In contrary to other subalpine species (e.g., Pinus koraiensis and Taxus cuspidata) in South Korea, whose growths are positively correlated with temperature in most seasons, the growths of Korean fir trees in Mt. Chiri appeared to be mainly limited by the moisture regime of spring prior to the cambial growth and early growing season.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.19 no.2
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• pp.497-507
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• 2018

Objectives: The purpose of this article was to evaluate the health related quality of life (HRQoL) of cancer survivors and to identify its predictors according to gender. Methods: The research was conducted with the data for 203 (cancer survivors?) taken from the 6th wave of the Korea National Health and Nutrition Examination Survey and the EQ-5D index score was used for the measurement of the health-related quality of life (HRQoL). The independent variables inluded socio-demographic data, health related factors (survival duration, disability, subjective health recognition), and psychosocial factors (stress, unmet medical needs). The data were analyzed by the t-test, ANOVA, and hierarchical multiple regression analysis. Results: the HRQoL of the female cancer survivors was significantly worse than that of the males in terms of their mobility, usual activities, pain/discomfort and anxiety/depression quality of life. The only statistically significant factor affecting the HRQoL of the male cancer survivors was their subjective health recognition. In the case of the female cancer survivors, the statistically significant factors were their age, subjective health recognition and unmet medical needs. Conclusions: the results of this study showed a different pattern of predictors according to the gender of the cancer survivors. Therefore, gender should be considered when assessing and addressing the individual care needs of cancer survivors, in order to obtain optimal treatment outcomes.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.18 no.1
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• pp.107-114
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• 2017

A turbocharger is an engine supercharger that is driven by exhaust gas. It improves the output and fuel efficiency by increasing the charging efficiency of the mixture gas, which is achieved by changing the rotatory power of the turbine connected to the exhaust passage. It is important to control the supercharging for this purpose. A nozzle slide joint is one of the core parts. Austenitic stainless steel is currently used as the material for this part, and its excellent mechanical properties include high heat resistance and corrosion resistance. However, because of its poor machinability, there are many difficulties in producing products with complicated shapes. Machining is used in the production of nozzle slide joints for high dimensional accuracy after metal powder injection molding. As design variables in this study, we investigated the sintering temperature, product stress, deformation rate, radius of curvature of the punch, and angle of the chamfer punch, which are related to the strain and shapes. The goal is to suggest a forming process using Nitronic 60 that does not require machining to manufacture a nozzle slide joint for a turbocharger. Accordingly, we determined the best process environment using finite-element analysis, the signal-noise ratio, and the Taguchi method for experiment design. The relative density and hydrostatic pressure of the final product were in accordance with the results of the finite element analysis. Therefore, we conclude that the Taguchi method can be applied to the design process of metal powder injection molding.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.18 no.1
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• pp.467-474
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• 2017

The objective of this study is to analyze teachers' experience in the operation of outdoor play in an early childhood educational institute. For this purpose, the experience obtained in planning/operating the outdoor play in early childhood educational institutes, as well as the difficulties experienced in their operational process, were examined. The data was collected through interviews with eight early childhood teachers. In the results of the study, first, the teachers' perception of outdoor play was analyzed. The teachers considered outdoor play as meaningful in that the children could develop gross/fine-motor skills, have the chance to develop their sociality, relieve their stress, and also commune with nature through outdoor play. Second, regarding the plan/operation of the outdoor play activities, even though they aimed to provide the children with meaningful outdoor play activities through various materials and methods, most of the teachers could not put their original plans into practice, because of the numerous variables in the actual site. The teachers' difficulties included insufficient time, spatial limitations, and insufficient qualifications for play instruction.