• Journal of the Institute of Electronics Engineers of Korea TC
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• v.49 no.6
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• pp.27-38
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• 2012

In this paper, we introduce CoMP in 3GPP LTE-Advanced Release 11 to take care of shadowing effects appearing in cell-edge areas to meet rapidly increasing demand for high speed transmission and multi-media data. In order to mitigate interference, orthogonalizing is ideal but it is slightly difficult to be applied to real systems. Therefore, interference alignment and avoidance are used in practical applications. Interference alignment is a scheme enabling us to consider interference our friend not enemy. We show lattice codes in Gaussian channel achieve Shannon capacity where strong interference exists. In addition, we show the relationship between channel parameter a and DoF(Degree of Freedom) applying lattice codes to interference alignment for interference channel with three users.

• KIPS Transactions on Software and Data Engineering
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• v.4 no.3
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• pp.129-134
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• 2015

Since automatic social engineering based spam attacks induce for users to click or receive the short message service (SMS), e-mail, site address and make a relationship with an unknown friend, it is very easy for them to active in online social networks. The previous spam detection schemes only apply manual filtering of the system managers or labeling classifications regardless of the features of social networks. In this paper, we propose the spam detection metric after reflecting on a couple of features of social networks followed by analysis of real social network data set, Twitter spam. In addition, we provide the online social networks based unsupervised scheme for automated social engineering spam with self organizing map (SOM). Through the performance evaluation, we show the detection accuracy up to 90% and the possibility of real time training for the spam detection without the manager.

• Korean Journal of Human Ecology
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• v.22 no.2
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• pp.245-256
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• 2013

This study examined the effects of social support on pre-service early childhood teacher's ego-resilience. The participants were 238 pre-service early childhood teachers in Daejeon Metropolitan City and Chungnam Province. The research instruments were Social Support by Yoon(1993), and Ego-Resilience by Park(1997). Collected data were analysed by F test and Duncon's test for post hoc test, and multiple regression, and Cronbach's ${\alpha}$ for reliability by SPSS PC program(17.0 version). The results were as follows: First, There were no significant differences in social support by education term. However, there were differences between sub-factors of social support by education term. Two-year had higher scores on social support from friends than three-year. Second, there were significant differences in ego-resilience by education term. In the order of four-year, two-year, and three-year had higher scores on ego-resilience. And, there were differences between sub-factors of ego-resilience by education term. Four-year had higher scores on self-confidence than three-year and two-year. In the order of four-year, two-year, and three-year had higher scores on ego-resilience, and anger regulation. Last, social support from friend and social support from professor explained 15% of variance in pre-service early childhood teacher' ego-resilience.

• The Journal of the Korea Contents Association
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• v.20 no.9
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• pp.365-379
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• 2020

The purpose of this study identifies the patterns of students' learning motivation profiles on entrepreneurial educational motivation among a sample of university students from one of the Korean national university(n=614). This study also examines the relationship between students' learning motivation profiles and entrepreneurial intention and types of entrepreneurship. In order to explore the types of leaning motivation profiles, a latent profile analysis was employed. Result from LPA revealed five distinct types of learning motivation profiles fit the data best, and these five profiles are compared with students' entrepreneurial intentions and types of entrepreneurship. Results showed that Profiles (profile 5 and 4-high goal orientation) are associated with the higher level of entrepreneurial intention. Regarding the type of entrepreneurship, the majority of all students are interested in individual and co-entrepreneurship with friend regardless of the patterns of profiles.

• Korean Journal of Human Ecology
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• v.17 no.2
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• pp.335-344
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• 2008

The purpose of this study was to examine male students' awareness and receptivity of cross-sexual fashion. The subjects in this study were 480 male university students and 320 high school boys. After a survey was conducted in August 2007, the following findings were given: 1. How much the students were interested in fashion was investigated, and they thought of fashion often, Even though nothing any fashion shopping plan they were interested display of fashion market and logged onto online fashion shopping malls frequently. 2. As for awareness of cross-sexual, they got a mean of 2.79(1.10), which indicated their awareness level was below the average. Those who were more intrigued by fashion, who were university students and who had a girl friend were better cognizant of cross-sexual. 3. To what extent they were receptive to cross-sexual fashion was checked in terms of clothes, haircare, skin care, accessories and perfume/cosmetic surgery and they were most receptive to cross-sexual haircare(3.49). Those who cared more about fashion were more receptive to cross-sexual. The Value of clothes and perfume/cosmetic surgery for university students was higher than the high school students. 4. They were most receptive to other's cross-sexual haircare(3.51) and to other's cross-sexual clothes(2.77) the least. Those who were more intrigued by fashion were more receptive to others seeking after cross-sexual. The Value of clothes sand perfume/cosmetic surgery for university students was higher than the high school students. 5. There was a strong correlational relationship among their interest in fashion, awareness of cross-sexual, receptivity to their own being a cross-sexual man and receptivity to others who are cross-sexual. The findings of the study illustrated that those who were more intrigued by fashion and who were better aware of cross-sexual were more receptive to cross-sexual fashion.

• Management & Information Systems Review
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• v.32 no.2
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• pp.315-338
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• 2013

Recently as the economic circumstances have been getting worse, livelihood crimes like shoplifting have occurred considerably frequently. Shoplifting is the stealing behavior occurred in the retail shop such as department store, discount store, supermarket. Though there is economic and social risk of shoplifting, academic research of shoplifting has implemented scarcely. This study analyzes the shoplifting behavior in the retail store and its influencing factors, and aims to provide background of academic research of this field. So this study will give practical implication to reduce or prevent shoplifting behavior. As a result of this study, friend relationship and compulsive buying disposition influence the attitude of shoplifting behavior. But economic motive, stimulus pursuit disposition, and experience motive do not influence the attitude of shoplifting behavior. Finally to reduce or prevent shoplifting behavior, this study suggests the implications of this study and further research agenda.

• Child Health Nursing Research
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• v.9 no.3
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• pp.237-249
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• 2003

Purpose: This study was to investigate the smoking related social influence, refusal skill and nonsmoking related self-efficacy among adolescents. Method: The subject for this study consisted of 3,000 students of middle and high school located in Chonbuk province. The data were collected by self-report questionnaire from Aguest 19 to September 14, 2002. Result: The smoking rate was 3.3% in middle school students and 13.6% in high school students. The subject have had 61.1% of family members, 42.7% of same sex friends, 39.4% of object sex friend, 64.9% of peer group and 85.9% of teachers were being smoke. The smoking related social influence and smoking status showed significant relationship; current smokers' smoking related social influence level was much higher than former and never smoker. Friends', teachers' and family members' influences were important to adolescents' smoking. Adolescents had social influence made by many smokers. 27.7% of subject were suggested to smoke by near people, 40.4% of which them were smoked or tried to smoke. The mean refusal skill score of subject was 39.13 points per hundred. Adolescents have showed very low level of refusal skill to smoke. Current smokers' refusal skill level was significantly lower than former and never smoker. The mean average nonsmoking related self-efficacy score of current smoker was 44.46 percents per hundred, it showed that current smoker had very low level of self-efficacy to ceasing smoke. Conclusion: For the purpose of adolescents smoking prevention and ceasing, the educational program must designed to reduce smoking related social influence, to promote the refusal skill and nonsmoking related self-efficacy.

• Journal of the Korea Convergence Society
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• v.11 no.11
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• pp.337-344
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• 2020

The purpose of study was to identify ADHD traits and interpersonal stress influencing on hopelessness of college students. The participants were 160 college students. Data analysis was used by mean, SD, correlation and multiple regression. The major findings were as; Deficit attention is highest in ADHD, family relationship stress is highest in prsonal stress. Positive hopefulness is higher than hopelessness. ADHD traits and interpersonal sress were positively correlated with hopelessness. College students' hopefulness was positively affected by sex, hyperactivity. College students' positive hopelessness was positively affected by hyperactivity, deficit attention, stress with professor and stress with heterosexual friend. And the findings was provided for the support program on hopelessness regarding to ADHD and interpersonal stress of college students.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.23 no.6
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• pp.1087-1101
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• 2013

Most people are connected to Social Network Services (SNS) through smart devices. Social Network Services are tools that transport information fast and easily. It does not care where he or she comes from. A lot of information circulates and is shared on Social Network Services. but Social Network Services faults are magnified and becoming a serious issue. For instance, malicious users generate multiple IDs easily on Facebook and he can use personal information of others on purpose, because most people tend to undoubtedly accept friend requests. In this paper, we have specified research scope to Facebook, which is one of most popular Social Network Services in the world. We propose a way of minimizing the number of malicious actions on Facebook from malignant users and malicious bots by setting criteria and applying reputation system.

• Child Health Nursing Research
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• v.12 no.1
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• pp.34-43
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• 2006

Purpose: The purpose of this study was to identify the degree of internet addiction and factors affecting internet addiction in elementary school students. Method: The participants in this study were 1,328 students in 4, 5 or 6 grades of elementary school. They were recruited from two elementary schools. Data collection was conducted using of 6 questionnaires that were modified by the investigator. The data were analyzed with the SPSS win 10.0 program using descriptive statistics, Pearson correlation coefficients and stepwise multiple regression. Results: 1) The mean of total item score for internet addiction was 2.1, which was slightly low. Of respondents in this research 48.4% normally use the internet, while 48.5% addictively use the internet and as high as 3.1% were serious internet-addicted. 2) There was a significant correlation between internet addiction, self-esteem, aggression, impulsivity, parent's support and friend's support(γ= -.15 ～ .44). 3) Stepwise multiple regression analysis showed that amount of time spent on the internet per day, impulsivity, aggression, gender, self-esteem, duration to use of internet, father's age, and the major place where the internet was used were the predictors of internet addiction and accounted for 47% of the variance in internet addiction. Conclusion: Time spend on the internet per day, impulsivity, aggression, gender, self-esteem, duration to use of internet, father's age, the major place where the internet was used accounted for internet addiction in elementary school students. Therefore it is necessary to develop nursing interventions and to further identify the depth of the relationship of the related factors in order to decrease internet addiction.