• The Journal of the Korea Contents Association
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• v.21 no.11
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• pp.576-585
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• 2021

This study was a descriptive research study to examine the factors influencing cyberbullying tendency among college students. The data used in this study were collected from July 31 to August 13, 2020, from 396 students attending universities across South Korea. The collected data were analyzed using frequency, percentage, mean, standard deviation, Pearson correlation coefficients, PROCESS macro model 4, Bootstrap, Sobel test using IBM SPSS Statistics version 20.0 and PROCESS macro for SPSS. The results of this study are as follows. First, there was a significantly negative correlation between academic stress and self-control (r=-.246, p<.001). There was also a positive correlation between academic stress and cyberbullying tendency, but it was not significant (r=.096, p=.055). Second, the mediation effect of self-control is significant between academic stress and cyberbullying tendency (R2=.039, p<.001). Therefore, Academic stress and self-control should be considered in the development of cyberbullying prevention programs, and further research is also needed to verify the effectiveness of the cyberbullying prevention program based on this study.

• Journal of Korea Technology Innovation Society
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• v.20 no.3
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• pp.754-780
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• 2017

This study was conducted to investigate whether WGB (Work-Growth Balance), an area of WLB (Work-Life Balance) improves Interpersonal Harmony, Creative Effort and Innovative Behavior in the organization, and whether Interpersonal Harmony and Creative Efforts have indirect effects on the relationship between WGB and Innovative Behavior. To test the hypothesis of this study, PROCESS Macro by Hayes (2013) was used. The results showed that WGB, Interpersonal Harmony, and Creative Effort influenced Innovative Behavior and WGB were variables that influenced Interpersonal Harmony. The variables influencing Creative Effort turned out to be WGB and Interpersonal Harmony. The indirect effect of Interpersonal Harmony and Creative Efforts was also confirmed in the relationship between WGB and Innovative Behavior. In addition, the magnitude of the effect between parameters was examined through Process Macro analysis. It turned out that there is a synergy relationship between WGB, Interpersonal Harmony, Creative Efforts and Innovative Behaviors. In future, more researches on WGB among various industries as well as mediating variables are expected. Further research is needed to study the various parameters of WGB and innovation behavior, and to Balance of Work-Family and Balance of Work-Leisure.

• The KIPS Transactions:PartC
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• v.9C no.1
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• pp.97-106
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• 2002

In 3GPP2 standard, MIP is used and a PDSN performs the function of FA to support macro mobility. When a MS is roaming from a PDSN area to another, the mobility supported is called macro mobility, while it is called micro mobility when a MS is roaming from a RN area to another in a PDSN area. Since a PDSN performs the function of FA in 3GPP2 standard, it is possible to support mobility but its mechanism is actually for supporting macro mobility, not for micro mobility, thus it is weak in processing fast and seamless handoff to support micro mobility. In this paper, we suggest the seamless handoff algorithm barred on multicast group mechanism to support micro mobility. Depending on the moving direction and velocity of a MS, the suggested algorithm constructs a multicast group of RNs on the forecasted MS's moving path, and maximally delays RNs'joining to a multicast group to increase the network efficiency. Moreover, to resolve the buffer overhead problem of the existent multicast scheme, the algorithm suggests that each RN buffers data only after the forecasted handoff time. To prove deadlock freeness and liveness of the algorithm. we use state transition diagrams, a Petri-net modeling and its reachability tree. Then, we evaluate the performance by simulation.

• Convergence Security Journal
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• v.18 no.5_1
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• pp.113-120
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• 2018

Today, the development of information and communication technology is rapidly increasing the number of users of network-based service, and enables real-time information sharing among users on the Internet. There are various methods in the information sharing process, and information sharing based on portal service is generally used. However, the process of information sharing serves as a cause of illegal activities in order to amplify the social interest of the relevant stakeholders. Public opinion attack using macro function can distort normal public opinion, so security measures are urgent. Therefore, security measures are urgently needed. Macro attacks are generally defined as attacks in which illegal users acquire multiple IP or ID to manipulate public opinion on the content of a particular web page. In this paper, we analyze network path information based on traceback for macro attack of a specific user, and then detect multiple access of the user. This is a macro attack when the access path information for a specific web page and the user information are matched more than once. In addition, when multiple ID is accessed for a specific web page in the same region, it is not possible to distort the overall public opinion on a specific web page by analyzing the threshold count value.

• Journal of the Korea Convergence Society
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• v.11 no.6
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• pp.383-391
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• 2020

The purpose of this study was to identify the moderating effect of self-control in the relationship between online game addiction and depression among adolescents exposed to the online game environment. A total of 378 respondents who are high school students in K Metropolitan City were selected for the current study. The process macro program developed by Andrew F. Hayes was used to analyze for the moderating effect and the SPSS 25.0 program was used for frequency, descriptive statistics, and correlation analysis. The results showed that online game addiction in adolescents had a significant positive effect on depression and self-control had a negative effect on depression, and self-control had a moderating effect on the relationship between online game addiction and depression in adolescents. The higher the online game addiction among adolescents, the higher the depression, and the influence depends on the level of self-control.

• Asia pacific journal of information systems
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• v.5 no.1
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• pp.236-257
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• 1995

Not much attention has been paid to the characteristics of successful MIS in small business in Korea. This study compares the characteristics of successful MIS with those of less successful MIS of manufacturing industry in Korea in terms of micro level, macro level, and personal level. The micro level consists of those variables relating to the system development and maintenance while the macro level consists of the environmental variables relating to the information systems. The personal level measures a personal EDP experience. A mail survey was sent to small manufacturing companies to collect the data for the hypothesis tests. And 81 usable questionnaires were returned for data analysis. This study performs the validity of the categorization of variables in terms of three levels. The results shows that this categorization is appropriate but the personal level. As the personal experiences of EDP in Korea used to come up with those of the organization, the variables in the personal level have high correlations with those in the macro level in empirical testing. As the personal level, however, is different dimension from the macro level in theoretical aspect, the level is maintained separately throughout the study. The data were analyzed with MANOVA and two group discriminant analysis. The analyses reveal that the characteristics of successful MIS are different from those of less successful MIS in terms of three levels. And the micro level is more important than the macro level to develop successful MIS. That is because the organizations have relatively few experience in dealing with information systems, they have not developed unique information systems which are adjusted to their organizational characteristics. Those findings seems to be important determinants of success for the MIS in a firm.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.39C no.9
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• pp.861-869
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• 2014

This paper shows the research of a platform architecture relates to the LTE-based macro basestation; the proposed platform architecture is designed with the interface between the baseband signal and IF (Intermediate Frequency) per codeword. Using this method, we can smoothly transmit/receive a large amounts of data regardless of the number of antenna in a macro base station which is used technology such as massive MIMO. In this paper, We analyzed the evolution of LTE technology and the trend in the development of the LTE-based system. For validation of the proposed architecture, we compare the general architecture of a conventional with the proposed architecture. From the calculation results of transmission quantity data, we see that the proposed architecture can give better performance than the existing architecture. By presenting this architecture, we hope to provide a new foundation for Design and Implementation of a LTE base station platform which is used technology such as massive MIMO, carrier aggregation (CA), coordinated multi point (CoMP).

• The Journal of Korean Institute of Communications and Information Sciences
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• v.37 no.7B
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• pp.505-516
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• 2012

According to distribute of resource of macro cell and reduce distance between transmitter and receiver, Femto cell system is promising to provide costeffective strategy for high data traffic and high spectral efficient services in future wireless cellular system environment. However, the co-channel operation with existing Macro networks occurs some severe interference between Macro and Femto cells. Hence, the interference cancellation or management schemes are imperative between Macro and Femto cells in order to avoid the decrease of total cell throughput. First, we briefly investigate the conventional resource allocation and interference cancellation scheme between Macro and Femto cells. So we found that cell throughput and frequency reuse ware decreased Then, we propose an adaptive resource allocation scheme based on the distribution of Femtocell traffic in order to increase the cell throughput and also maximize the spectral efficiency over the FFR (Fractional Frequency Reuse) based conventional resource allocation schemes. Simulation Results show that the proposed scheme attains a bit similar SINR (Signal to Interference Noise Ratio) distribution but achieves much higher total cell throughput performance distribution over the conventional resource allocation schemes for FFR and future IEEE 802.16m based Femtocell network environment.

• The Journal of the Acoustical Society of Korea
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• v.42 no.1
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• pp.57-66
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• 2023

In this paper, it was investigated how the amount of energy harvesting will be varied from the FTEH which has inlet area is wider than outer area and attaching cantilever type MFC (Macro Fiber Composite) using by theoretical and experimental approaches. When MFC length increased 50 % vibration displacement also increased 3.5 times. When thickness decreased vibration displacement increased 30.9 times. In underwater tank experiments FTEH with spiral screw, flexible support, vertical direction fabrication cases showed maximum energy harvesting more 5 times than the case of MFC installed horizontally without spiral screws and on rigid supports. When the flow speed of 0.24 m/s FTEH's optimal resistance applied 4,10 kΩ, energy storage in the capacitor was measured 4 ㎼·s during 350 seconds. It was confirmed that the charging energy can be increased by lengthening the capacitor charging time of the large-area MFC installed vertically on the flexible support at high flow speed.

• Journal of Digital Convergence
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• v.19 no.4
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• pp.177-183
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• 2021

The purpose of this study was to investigate the double mediation effects of interpersonal relationship ability and self-efficacy in the link between family strengths and self-esteem of college students. To this end, a survey was conducted for 1 month in November 2019, targeting 340 students conveniently sampled from C city in Chungcheongbuk-do and J city in Jeollabuk-do, and the analysis was conducted using SPSS Win. 25 and SPSS PROCESS Macro. The applied statistical techniques were mean comparison analysis (t-test, One-ANOVA), correlation analysis, and PROCESS Macro model No. 6 to analyze the double mediating effect. The main findings of the study are: First, self-esteem was significantly higher in education major than in other majors. Second, as a result of correlation analysis, self-esteem showed a significant positive correlation with family strength, interpersonal relationship ability, and self-efficacy. Third, as a result of the double mediation effect analysis, interpersonal relationship ability and self-efficacy double mediated in the relationship between family strength and self-esteem. The results of this study can be used as basic data to enhance the self-esteem of college students by utilizing interpersonal relationship ability and self-efficacy.