• The Journal of the Korea Contents Association
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• v.18 no.4
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• pp.677-687
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• 2018

The purpose of this study is to investigate the causes of pre-roll ads played before watching online video contents, and to investigate the using motives by dividing them into broadcasting contents clips and web original contents. The results show that broadcast contents clips have higher use of entertainment/habitual use and social interaction, and that the use time of web content is higher when entertainment/convenience and selective use motivation are higher. Second, perceived invasion has the greatest effect on ad avoidance in broadcasting contents clip, and positive attitude toward advertisement is a significant factor in web contents. Content factors such as content preference and engagement did not affect the avoidance of pre-roll ad.

• Proceedings of the Korean Information Science Society Conference
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• 2012.06d
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• pp.208-210
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• 2012

일반적으로 비동기식 센서 네트워크 MAC 프로토콜들은 별도의 충돌회피 알고리즘을 사용하지 않기 때문에 동기식 MAC 프로토콜에 비해 충돌에 의한 성능 저하가 크게 나타난다. 본 논문에서는 충돌에 따른 비동기식 MAC 프로토콜의 성능 저하 문제를 최소화하기 위해 수신 노드가 충돌을 야기한 송신 노드들의 전송 순서를 제어하여 추가적인 충돌을 제거할 수 있는 비동기식 MAC 프로토콜용 충돌해결 알고리즘을 소개한다. 충돌을 감지한 수신 노드는 충돌을 일으킨 송신 노드들에 대한 정보를 수집하고 이를 이용하여 충돌이 발생하지 않는 전송 순서를 각 송신 노드에게 지정한다. 송신 노드들은 지정된 순서에 따라 독점적인 채널 사용 권한을 얻으며 이를 통해 송신 노드간의 충돌을 회피할 수 있다. 실험에 대한 분석에 따르면 본 논문에서 제안하는 충돌해결 알고리즘은 반복적인 충돌을 방지하여 그로 인해 낭비되는 시간과 대역폭을 줄이고 이를 통해 각 노드당 평균 데이터 처리량을 약 18.6% 증가시킬 수 있다.

• Journal of Digital Convergence
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• v.20 no.5
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• pp.559-567
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• 2022

The effect of smartphone usage motivation on application display advertising attitude and advertising avoidance was investigated. In addition, the mediating effect of advertising intrusion was confirmed. The total number of participants in the study was 309, and the data collection method used a survey method. Covariate structural analysis was conducted to investigate the causal relationship between smartphone usage motivation and advertising attitude and the mediating effect of perceived intrusion on advertising avoidance. There are five results. First, the motivation for using smartphones had a significant effect on the display advertising attitude of smartphone applications. Second, the display advertising attitude of the smartphone application had a significant effect on the advertising avoidance behavior. Third, the display advertising attitude of smart phone application had a significant effect on perceived advertising intrusion. Fourth, the perception of intrusiveness of display advertising in smartphone applications had a significant effect on advertising avoidance behavior. Finally, it was confirmed that the perceived ad intrusion has a partial mediating effect in the causal relationship of the smartphone application display advertising attitude to the ad avoidance behavior. The results of this study will contribute to suggesting strategies to reduce advertising avoidance behavior.

• Proceedings of the Korea Information Processing Society Conference
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• 2002.04a
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• pp.23-26
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• 2002

클라이언트/서버 데이타베이스 시스템 환경이 대중화됨에 따라 클라이언트 캐쉬 데이터의 일관성을 유지하기 위한 기법들이 많이 제안되고 있다. 기존의 회피-기반 기법들은 갱신의도(write intuition) 선언을 동기적(synchronous)으로 수행하는 CB(Callback) 기법과 지연(defereed)하는 O2PL(Optimistic 2-Phase Locking) 기법을 기반으로 연구가 이루어졌다. 본 논문에서는 회피-기반(avoidance-based)에서 서버에게 갱신의도 선언을 비동기적으로 수행하는 캐쉬 일관성 유지 기법을 제안한다. 본 논문에서 제안한 기법은 갱신의도 선언을 비동기적으로 수행함으로 서버의 응답을 기다리지 않고 트랜잭션 처리를 수행함으로써 좋은 성능을 보이고, 트랜잭션 철회(abort)율이 낮다는 장점을 갖는다.

• Journal of the Korea Convergence Society
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• v.13 no.5
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• pp.53-60
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• 2022

The purpose of this study is to identify the causal relationship of the structural model through approach motivation, avoidance motivation, and digital usage recognition in order to prepare a plan for coexistence with dental hygiene targeting 239 students from the dental hygiene department at a university in Gangwon-do. For statistical methods, SPSS Statistics 24.0 program and AMOS 21.0 were used. As a result of the structural equation model analysis, the motivation for approach was found to be significantly related to digital usage recognition and class satisfaction. In addition, digital usage perception was found to be significantly related to class satisfaction, and class satisfaction was shown to be significantly related to department satisfaction and department recommendation. Lastly, department satisfaction was significantly found in department recommendation. In other words, the coexistence plan with dental hygiene (department) is to expand the convergence of digital classes. In order to solve the problem, it is necessary for schools to establish facilities to expand teaching materials for practical classes and to devise teaching methods.

• The Journal of the Korea Contents Association
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• v.17 no.8
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• pp.301-311
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• 2017

The current study investigated whether individual variation in motivational activation would predict the drug-use and interacts with discrete emotions to influence the responses to anti-drug advertisements. Motivational activation tendency indicates an individual's level to approach life-sustaining elements and defend life-threatening stimuli. Discrete emotion represents joy, sadness, and fear elicited by the advertisements. The experiment proceeded using both self-reports and physiological responses with 80 subjects. Results showed that approach motivation activation can be a target for anti-drug advertisements and in order to target individuals higher in approach activation, it is necessary to use the appeal type to elicit positive emotions such as joy.

• The Journal of the Korea Contents Association
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• v.19 no.3
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• pp.659-674
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• 2019

The purpose of this study is to verify the path of the motivation, the flow, and problem gambling and intervention points. To this end, we verified the mediation effect of the motivation of the users outside sales offices influences the problem gambling through a flow and the moderated mediation effect of the frequency of the use of a bicycle racing tracks in that process. A total of 411 cases were analyzed using surveys conducted for one day on a weekday and weekend (September 13th and 15th 2018) for adults using an outside sales office in Jangan. According to the analysis, the causality of gambling by gambling motivation(amusement, excitement, avoidance, society, money) showed its effect positively by mediating the flow. The adjusted effect of the frequency of the use on the intermediary effect of the motivation ${\rightarrow}$ flow ${\rightarrow}$ problem gambling behavior, which is the main concern of this study, was found to be statistically significant. More specifically, the effect of adjusting the frequency of the use was statistically significant in both paths: motivation/flow and flow/problem gambling. It was also shown that, in the model with excitement, avoidance and social motivation, the adjustment of the frequency was only significant in the causal relationship between the flow and problem gambling. Based on these findings, this study made clinical and policy suggestions for intervention for gamblers and user protection regulations.

• The Transactions of the Korean Institute of Power Electronics
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• v.16 no.4
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• pp.351-357
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• 2011

Rotor position is essentially required for vector control of permanent magnet synchronous generator(PMSG) and position sensor such as encoder are generally used for the purpose of position sensing. However, the use of position sensor degrades reliability of PMSG control system. This paper presents position sensor fault tolerant control method for PMSG control system. Sensorless position estimator based on extended electromotive force(EMF) is operated in parallel with sensored vector control to provide rapid reconfiguration capability to sensorless vector control at the moment of position sensor fault detection. Experimental results show the effectiveness of the proposed method.

• Proceedings of the Korean Information Science Society Conference
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• 2000.10a
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• pp.107-109
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• 2000

고속 LAN과 같은 통신 장비의 발달로 클라이언트/서버 시스템 환경이 일반화됨에 따라 데이터베이스 시스템도 클라이언트/서버 환경을 지원하는 데이터 서버로서의 역할이 요구되었다. 또한, 다양하고 복잡한 형태의 제어 시스템들이 필요한 각 응용 분야에서 클라이언트/서버 시스템이 이용되고 있다. 이러한 상황에서 클라이언트들은 통신 비용 절감과 서버의 부하를 줄이기 위해 클라이언트의 버퍼에 데이터의 사본을 캐쉬(cache) 함으로써 클라이언트 시스템의 확장성 및 독립성을 추구한다. 하지만, 캐쉬한 데이터의 사본에 의해 갱신 연산이 수행되기 때문에 캐쉬 데이터의 일관성 유지를 위한 효율적인 방법들이 필요하다. 본 논문에서 제안한 기법은 클라이언트/서버 간의 데이터 전송이 페이지 단위로 행해지는 페이지-서버 환경에서 적용되는 회피-기반(avoidance-based) 기법으로써, 클라이언트가 데이터를 갱신할 때 갱신 의도를 비동기적으로 선언하는 캐위 일관성 유지 기법을 제안하였다. 그리고 제안한 기법과 최근에 제안된 기법들을 비교 분석하였다.

• The Journal of the Korea institute of electronic communication sciences
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• v.5 no.5
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• pp.534-540
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• 2010

In this paper, we propose the mathematical algorithm for collision avoidance between the robots and for the obstacle avoidance during the operation of the several chaotic robotics. For the useful formation control and as one of the method to provide command structure of communication between the robots, we also propose the synchronization method between the robotic system and confirmed the result with the computer simulation.