• Journal of Korea Multimedia Society
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• v.10 no.3
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• pp.348-357
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• 2007

One of the major issues in recent researches on wireless sensor networks is to reduce energy consumption of sensor nodes operating with limited battery power, in order to lengthen their lifespan. Among the researches, we are interested in the schemes in which a sensor node periodically turns on and off its radio and requires information on the time when its neighbors will wake up (or turn on). Clock synchronization is essential for wakeup scheduling in such schemes. This paper proposes three methods based on the asynchronous averaging algorithm for clock synchronization in sensor nodes which periodically wake up: (1) a fast clock synchronization method during an initial network construction period, (2) a periodic clock synchronization method for saving energy consumption, and (3) a decision method for switching the operation mode of sensor nodes between the two clock synchronization methods. Through simulation, we analyze maximum clock difference and the number of messages required for clock synchronization.

• Journal of the Korea Convergence Society
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• v.9 no.5
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• pp.157-169
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• 2018

The purpose of this study is to investigate the effect of voluntary purchasing motives on insurance consumer satisfaction. The purpose of this study is to investigate the direct and indirect effects of insurance consumption satisfaction including psychological needs of consumers that induce voluntary purchase motivation based on psychological self-determinism theory. The research hypotheses and models were verified through structural equation analysis using online surveys of 1,225 insurance consumers. As a result of the study, the satisfaction of insurance consumption is increased when purchasing by voluntary purchase motive, in which consumers perceive the necessity of purchasing themselves. The positive perception of insurance consumption autonomy and insurance consumption environment increases the motivation to purchase voluntarily, Respectively. Through this study, it is suggested that excessive marketing of insurance companies and self-confidence of insurance consumers may hinder insurance consumption satisfaction and education of consumption attitudes of financial consumers to raise awareness of autonomous rights and responsibilities of insurance consumers.

• Journal of the Korean Society for information Management
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• v.37 no.1
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• pp.51-78
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• 2020

Recently, the emphasis on self-directed learning and lifelong education is increasing the importance of school libraries in the curriculum. Accordingly, various studies have been conducted mainly from a structural, institutional and operational point of view. However, more research is necessary on the micro topics such as school library users' autonomous intrinsic motivations in the sense that school libraries play key roles in autonomy-based self-directed education. This study aims at finding out what types of school library use motivations are more important and the degree to which the use motivations affect the school library service quality based on the self-determination theory. In addition, this study examines how the use motivations and the perceived service quality vary depending on the school grade of the library users. Based on a focus-group-interview pilot study, a questionnaire survey was administered on the effects of school library motivations on perceived library service quality to 588 students from 5 high schools and 2 middle schools in Seoul. When the service quality and its components, service affect, information control, and library as place were set as dependent variables, in all these four cases, intrinsic motivations were more significant than extrinsic motivations. In addition, when middle school students and high school students were selected as separate analysis target groups, the results of both analyses show that the higher the intrinsic motivations were, the higher the perceived service quality was. The contribution of this study is that it applies the self-determination theory to school library service, measures the influence of motivation type based on the theoretical basis, and focuses on micro aspects to improve school library services.

• Journal of The Korean Association of Information Education
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• v.10 no.1
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• pp.93-104
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• 2006

The purpose of this study is to examine the effects of GLAS(Guided-Learner Adaptable Scaffolding) strategies in web-based collaborative learning environments. Through the extensive literature reviews, web-based collaborative learning environments considering GLAS types were developed. 93 sixth graders were selected from a elementary school in Seoul, and they learned in the web-based system for 4 weeks. The results revealed that the impact of scaffolding on transfer of learning, cognitive overload by reflective scaffolding, learning motivation affected intrinsic scaffolding.

• 한국사회복지학회:학술대회논문집
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• 2005.04a
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• pp.423-444
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• 2005

본 논설은 1960년대 초 이래로 강력히 시행되었던 만국의 출산억제 정책이 여성들의 삶과 새로운 가족규범 및 사회 전반에 미친 영향력에 관하여 Global Standard의 출산복지라는 잣대에 준거하여 검토해 보고자 한다. 이러한 목적을 위하여 연구 방법론으로는 문헌조사 및 인터뷰를 사용한다. 문헌조사를 통하여 한국 정부 및 국내외관련기관들에 남겨진 기록들을 검토하고 인터뷰를 통하여 산아제한운동에 직접 관여하였거나 깊은 관심을 갖었던 주요 인사들의 증언을 수집한다. 구체적으로 1961년부터 1992년까지 시행된 한국의 출산율 감소정책에 대한 사례연구를 Global Standard의 출산복지에 비추어 검토한다. 한국의 인구통제정책의 근원을 밝혀내고 만국의 출산율 감소정책이 공식화되고 시행되는데 관련되었던 국내외의 세력들을 탐색해 본다. 특히 주요 정치인들과 정책 결정자들이 여성의 자율적 출산권(出産權)을 통제하게 된 동기, 철학 그리고 배후의 이익 등을 규명하기 위하여 본 연구는 정책의 여러 측면들을 탐구한다.

• Proceedings of the Korean Society for Cognitive Science Conference
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• 2000.05a
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• pp.37-40
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• 2000

'바른 우리글 쓰기' 학습시스템은 우리말 작문 학습에 필요한 지식을 익히도록 하고자 만들었다. 이 논문의 궁극적인 목표는 한국어 철자/문법 검사기와 국어 학습시스템을 연계하여 학습자가 적극적으로 학습에 참여하도록 동기를 부여하는 능동적인 언어 학습 시스템의 구현이다. 흔히 웹에 기반한 학습시스템에서 학습자는 일방적으로 정보를 제공받거나 독립적인 위치에서 자율적인 학습을 해나가야 하므로 끊임없는 흥미와 관심이 없이는 효율적인 성과를 거두기 어렵다. 이와 같은 약점을 보완하려는 맥락에서 이 학습시스템은 학습자가 스스로 학습한 후 그 결과를 평가 문제나 한국어 철자/문법 검사기를 통해 즉각적으로 확인해 보고 부족한 내용을 공부할 수 있도록 한다.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.15 no.8
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• pp.4919-4929
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• 2014

This study was conducted to understand the relationships among adolescents' academic personality types (APT), learning behavioral types (LBT) and self-determinative learning motivations (SDLM). Regarding the measuring tools, the U&I APT test developed by Man-kwon KIM and Jong-cheol HAN (2002) and the learning motivation test translated by Kyeong-jin MIN (2006) were used. The study collected data from a total of 237 adolescents. First, gender did not influence the APT and LBT, and in terms of the introjected regulation as in the SDLM, female students were observed to have greater than the male students. Second, the normative type as in the APT was understood to have an identified regulation, an integrated regulation and an internal motivation as in the SDLM higher than those of the behavioral type or ideal type. Third, the normative type would be less rebellious and work harder to achieve a goal compared to the other types. Fourth, when adolescents have this motivation more voluntary and internal, they pursue greater goals for themselves, trying harder to fulfill their goals. The SDLM appeared to be related to most of the LBT.

• Clean Technology
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• v.6 no.1
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• pp.7-15
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• 2000

The purpose of this articls is to investigate the impacts of ISO 14001 certification on the compliance of environmental regulations by Korean companies. The impact of ISO 14001 certification on the industries obtained the certificates was studied through a survey with questionnaires, and the compliance of environmental regulations was investigated using governmental release data. Motivations of Korean companies' environmental management were mostly caused by customer's request and the requirement from foreign countries. Certified enterprises showed more 3 times compliance of environmental regulation than non-certified ones. Such results were accomplished by systematic environmental management such as clear implementation purpose and all employee's voluntary improving according to ISO 14001 requirement. The continuous monitoring system was possible through internal audit and biannual audit from the certification body, to be finally verified by the top management. The four steps in ISO 14001 environmental management system, which are objective, methodology, inspection and monitoring, has contributed to this achievement.

• Korean Journal of Culture and Social Issue
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• v.14 no.1_spc
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• pp.187-221
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• 2008

Although academic interest, the intersection of cognition, emotion, and motivation, is a primary goal of learning and mediates the effects of learning, the present learning environment is full of impeding factors which undermine learner's interests in learning situation. The purpose of this study is to examine current state of academic interests of Korean students and to identify several potential causes of developmental declines in academic interests. It has been consistently found that academic interests in various school subjects decrease with age and grade in school. Three potentially contributing factors to the observed loss of academic interests are mainly discussed: deprived autonomy, severe competition, and normative evaluation. Based on theories on interest and motivation, and empirical findings, various prescriptions are also suggested for designing an interest-based learning environment in order to trigger and enhance learner's academic interests.

• The Transactions of the Korea Information Processing Society
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• v.13 no.3
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• pp.111-121
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• 2024

Recently, thanks to the development of artificial intelligence technologies such as image recognition, research on unmanned aerial vehicles is being actively conducted. In particular, related research is increasing in the field of military drones, which costs a lot to foster professional pilot personnel, and one of them is the study of an intelligent framework for autonomous mission performance of reconnaissance drones. In this study, we tried to design an intelligent framework for unmanned aerial vehicles using the methodology of designing an intelligent framework for service robots. For the autonomous mission performance of unmanned aerial vehicles, the intelligent framework and unmanned aerial vehicle module must be smoothly linked. However, it was difficult to provide interworking for drones using periodic message protocols with model-based interfaces of intelligent frameworks for existing service robots. First, the message model lacked expressive power for periodic message protocols, followed by the problem that interoperability of asynchronous data exchange methods of periodic message protocols and intelligent frameworks was not provided. To solve this problem, this paper proposes a message model extension method for message periodic description to secure the model's expressive power for the periodic message model, and proposes periodic and asynchronous data exchange methods using the extended model to provide interoperability of different data exchange methods.