• Journal of Digital Convergence
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• v.12 no.2
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• pp.587-594
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• 2014

This study was carried out to look into the cognitive function of the elderly in community and investigate the factors affecting their cognitive decline provide preliminary data so as to help develop a program to maintain and promote cognitive function. With 481 senior citizens aged over 65 in J. city, a survey was conducted on their demographic characteristics, health-related characteristics and depression using structured questionnaires from September 1 through 7, 2011. The collected data were analyzed by descriptive statistics, Chi-square test and logistic regression analysis using IBM SPSS Statistics V. 20. As a result of this study, 40.1% of the subjects showed cognitive decline and the factors related to their cognitive decline turned out to be the level of education (p<.001), age (p=.000), depression and exercise (p<.05). Therefore, intervention programs on depression or exercise should be implemented intensively and in particular, various programs and educations should be provided considering individual differences according to the level of education and age.

• Journal of the Institute of Electronics and Information Engineers
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• v.52 no.1
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• pp.79-86
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• 2015

Cognitive radio networks (CRNs) offer the promise of intelligent radios that can learn from and adapt to their environment. CRN permits unlicensed users to utilize the idle spectrum as long as it does not introduce interference to the primary users due to the Federal Communications Commission's recent regulatory policies. Thereby, the security aspects in CRNs should be different with the other networks. The purpose of this paper is to devise a new delegation-based authentication protocol (NDAP) by extracting out the security aspects for unlicensed user authentication over CRNs from Tsai et al's delegation-based authentication protocol (TDAP). First of all, we will provide security analyses on the TDAP and set design goal for unlicensed user authentication. Then, we will propose a NDAP as a remedy mechanism for the TDAP and a new protocol for CRNs. The NDAP could be used as a security building block for the CRNs and various convergence applications.

• Journal of Digital Convergence
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• v.11 no.3
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• pp.363-369
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• 2013

In this paper, the modeling of phenomena that occurs in the brain related language was designed and developed the second language proficiency method. This method based on cognitive ability test in cognitive psychology that is the lexical decision task, the priming task and the verbal span task. The lexical decision task involves measuring how quickly decide stimuli as words or nonwords. This task is divided reading and listening according to stimulus type to the details. The priming task finds the output of the language. This task is divided the translation-priming and the semantic-priming according to stimulus type. The verbal span task finds the short term memory. In this paper, we propose the second language proficiency measurement method using the linguistics cognitive ability of the learner about the second language.

• Journal of Digital Convergence
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• v.16 no.11
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• pp.393-400
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• 2018

The purpose of this study was to identify the effects of metacognition and self-leadership on social responsibility in nursing students and verify the mediating effects of self-leadership on the relationships between metacognition and social responsibility. The subjects of this study consisted of 131 nursing students. Data were collected using self-reported questionnaires. The results were as follows: There was a significant correlation with metacognition, self-leadership and social responsibility. Metacognition and self-leadership had a positive effect on social responsibility. Self-leadership had a partial mediating effect in the relationship between metacognition and social responsibility. Conclusively, this results indicate a need to develop programs that effectively promote the self-leadership and maximize metacogniton to increase social responsibility in nursing students.

• Journal of Digital Convergence
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• v.15 no.11
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• pp.413-424
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• 2017

This research was conducted to find out about the effects of a perceived usefulness and a perceived ease of use on the viewer's attitude and their intention to use of the Terrestrial UHD Broadcasting. The survey was conducted with 191 respondents while innovativeness, relative advantage, active engagement, accessibility and affinity were considered as the external variables for this research. As the result shows, the external variables that affect the perceived usefulness are affinity, relative advantage, and innovativeness. However, it was confirmed that the accessibility has no major effect on the perceived usefulness. Among the external variables, the innovativeness has the highest level of effectiveness on the perceived usefulness of UHD broadcasting. Relative advantage, active engagement, and affinity were followed in orderly fashion. Especially, the perceived ease of use on UHD broadcasting has a major effect on the perceived usefulness. Also, the perceived usefulness affects the viewers' attitude and their intention to use. And the research verified that there is no correlation between the perceived ease of use vs. attitude and between attitude vs. intention to use. Therefore, we can safely say that the perceived usefulness of UHD broadcasting has main effects on viewers' attitude and their intention to use of UHD broadcasting.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.21 no.7
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• pp.201-211
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• 2020

Green/climate technology has been emphasized as a growth engine that can boost the global economy via environmentally friendly products. Recently, SMEs in Korea have been recognized as a critical actor in the globalization of green/climate technologies. However, there has been no survey and few studies on the satisfaction level of the support for the overseas expansion of SMEs in the green/climate technology field. Therefore, this study aims to support a policy for the establishment of SMEs' green/climate technology by investigating and analyzing expert opinions on SMEs. Through a literature survey, support policies were classified into four types, and then according to the types, satisfaction factors and obstacle factors for overseas expansion were derived and analyzed. In the results, the SMEs overall showed low levels of awareness and satisfaction and were found to be struggling due to all obstructive factors. In addition, the most important success factor for overseas expansion was found to be the policy related to funding support. Thus, it is necessary to improve the accessibility, advertisement, and support strategies of support policies, and in particular, appropriate budget allocation should be made available by considering the characteristics of companies.

• Journal of the Korea Convergence Society
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• v.9 no.9
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• pp.285-292
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• 2018

The purpose of this study is to analyze the association of smoking cessation attempts and the perceived stress level and to identify the factors affecting the perceived stress level of quit smoking. The study utilized the 2015 Korean National Health and Nutrition Examination Survey, and was applied an Ordinal Logistic Regression to examine the association of smoking cessation attempts and perceived stress level. The current smoker those who experience failure in smoking cessation, were more stressful than those who experience success in smoking cessation (OR=1.72, CI;1.41-2.08). This study identified smoking cessation failure as a major psychiatric factor associated with high perceived stress level, and suggests high stress after smoking cessation failure as one of the reasons why smokers do not reach complete smoking cessation. Also, in order to promote smoking cessation, it is needed to have political approach in reducing the psychiatric hurdle like high stress after smoking cessation failure.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.21 no.5
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• pp.598-606
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• 2020

This study analyzed the factors of stress perception and their patterns depending on the high school students from different types of high school, which include academic high schools and vocational high schools. The data reflected the degree of stress perception according to several factors, which are considered to be related to stress perception, and the study analyzed how differently these factors affected students in each school type. The subjects were 29,380 students from the 14th Korea Youth Health Behavior Survey who meet the purpose of this study. The factors related to stress perception were classified into general characteristics, health behavior characteristics, and health status characteristics. The factors of the study were compared in each group and between the groups. In both school types, stress perception was associated with a number of common factors and some group specific factors. The common main factors related to stress perception were depressive experience, subjective recognition of their health status, subjective recognition of sleep satisfaction, and gender. However, the pattern in which each factor was related to stress perception differed according to the school types. Therefore, efforts should be made to reflect the characteristics of each school type while considering the common factors related to stress perception when making policies for managing high school students' stress.

• The Journal of the Korea Contents Association
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• v.21 no.2
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• pp.631-640
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• 2021

The purpose of this study focuses on and explain the policy-determining factors that emerged in the process of revising customized wages for the National Basic Livelihood Security Act on December 30, 2014. This is an analysis of the reasons why the rapid revision of the welfare system could have been made at a certain time in a situation that did not progress despite the specific demand for revision of the law surrounding the blind spot. To this end, using Kingdon's policy flow model, which emphasizes the contingency of policy decisions, the flow of problems, political flows, and policy alternatives were reviewed respectively. In the course of each of these flows, the suicide incident of mother and 2 daughters in Songpa served as a major medium that played a large role in the policy-making process and the window of policy could be opened. As a result, This incident triggered social and policy interest in the issue of the National Basic Livelihood Security Act. It was found that the law was revised quickly, causing a great wave of waves as a social issue.

• Journal of the Korea Society of Computer and Information
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• v.16 no.5
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• pp.93-100
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• 2011

In this paper, we propose a FDR(False Data Reduction) strategy for P2P environment that reduces false data. The key idea of our strategy is that we use FDR algorithm to stop transmitting of false data and to delete that. If a user recognizes false data in downloaded-data and the user's peer requests the others to stop the transmission of the false data immediately. Also, the FDR algorithm notifies the other peers to prohibit spreading of the false data in the environment. All this procedure is possible to be executed in each peer without any lookup server. The FDR algorithm needs only a little data exchange among peers. Through simulation, we show that it is more effective to reduce the network traffic than the previous P2P strategy. We also show that the proposed strategy improves the performance of network compared to previous P2P strategy. As a result, The FDR strategy is decreased 9.78 ~ 16.84% of mean true data transmission time.