• Proceedings of the KAIS Fall Conference
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• 2006.11a
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• pp.180-185
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• 2006

자기 유사성(self-similarity)은 다양한 네트워크 환경에서 공통적으로 발생하는 현상인 것으로 정체 제어에서 자기 유사성 트래픽의 장거리 상관 구조를 활용할 가능성과 MTS(Multiple Time Scale) 정체 제어의 프레임워크를 발전시켜, 이 프레임워크가 전송 율 기반 피드백 제어의 성능을 향상시키는 데 시뮬레이션을 통해 트래픽 조건으로 다음과 같이 연구한다. 자기유사성 트래픽 조건에서 3가지 단계로 구성한다. 먼저 TCP의 모듈 형 확장에서 Tahoe, Reno, Vegas등 다양한 버전의 TCP에 적용되는 간단한 인터페이스를 통한 함수 호출을 정의하고, 이것이 성능을 크게 향상시는 것을 입증한다. 두 번째로, 광대역 WAN에서 지연-대역폭의 곱이 높을 경우 더욱 심각해지는 사후 제어의 불확실성 차이를 해소함으로써 MTS TCP가 기반 피드백 제어에 사전성을 부여한다는 것을 입증한다. 세번째는 트래픽 제어의 3가지 차원인, 즉 추적 능력, 연결 지속 기간, 공정성이 성능에 미치는 영향 등을 비교 분석하여 입증한다.

• Annual Conference of KIPS
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• 2013.11a
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• pp.821-823
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• 2013

무선충전기술은 개인별로 사용하는 모바일기기가 늘어나 충전에 따른 문제로 필요성이 대두되면서 무선충전의 세계 시장은 매년 80%이상 성장할 것으로 예상된다. 무선충전기술은 크게 전자파가 근거리 자기장을 통해 하나의 매체에서 다른 매체로 이동하는 기술인 자기공진방식과 수 mm내외로 인접한 두 개의 코일에 유도전류를 일으켜 배터리를 충전하는 방식인 자기유도방식으로 나뉜다. 현재는 모바일 기기시장에서 무선충전기술에 대한 성장이 이루어지고, 자동차의 경우도 전기자동차의 보급과 맞물려 시장에 보급될 것으로 보여 무선전력전송기술은 미래가 기대되는 기술이라고 볼 수 있다. 이러한 시점에서 무선충전이 적용된 다양한 환경에서 발생할 수 있는 보안 위협 요소를 도출하고자 한다.

• Annual Conference of KIPS
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• 2010.11a
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• pp.353-356
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• 2010

본 논문에서는 C언어를 이용한 자료구조를 자기 주도적으로 학습할 수 있는 원격 교육 시스템을 설계 및 구현하였다. 각 단원별로 이론 강의 및 실습 강의, 형성평가로 이루어져 있으며, 실습 강의에서는 코딩 영역에 직접 코딩한 소스를 온라인 상에서 컴파일 및 실행이 가능하도록 구현하였다. 특히 한 화면에서 따라가기 형태로 화면의 이동을 하지 않고 실습하는 것이 가능하고 코드의 실행 결과 보기를 할 수 있으므로, 자료구조 학습 내용을 학습자 스스로 충분히 숙지하고 실습할 수 있는 웹 기반 실습 환경을 제공한다. 이론과 실습을 겸함으로써 학습자는 이해하기 어려운 자료구조의 이해도를 높일 수 있고, 학습자가 주도적으로 실습에 참여하도록 유도함으로써 학습의 흥미를 높일 수 있게 하였다.

• Korean Journal of Environment and Ecology
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• v.26 no.6
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• pp.911-922
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• 2012

This study aim that definite the relationship between coastal environment and different sand bar communities, as well as to analyze their spatial distribution of barrier island in the Nakdong river estuary. Survey method follow by Braun-Blanquet(1965) and there a total of 118 relev$\acute{e}$'s were undertaken. Definition of the relationships between species and environmental variables with Canonical Correlation Analysis(CCoA) and that to applied these relev$\acute{e}$'s with the RIM(Kim and Kim, 2006) program and that to classification used the SYN-TAX 2000 program(Podani 1979). On the basis of about 118 phytosociological releve's, the vegetation of xeric and hydric type was arranged in twelve plant communities: Xeric type-Pinus thunbergii community,Vitex rotundifolia community, Carex pumila community, Imperata cylindrica var. koenigii community, Miscanthus sacchariflorus community and Calystegia soldanella community, Hydric type-Salix dependens-Calamagrostis epigeios community, Calamagrostis epigeios-Phragmites communis community, Phragmites communis-Ischaemum aristatum community, Phragmites communis community, Scirpus planiculmis community and Suaeda glauca-S. japonica community.These plant communities represents sand dune vegetation and salt marsh vegetation. Widely distributing types in the actual vegetation map were sea club-rush community, reed community in salt marsh, and dry grassland. The edge in the coastal sand bars has zonation that almost distribution by the reed community in salt marsh. But outside of it were distributed sea club-rush community. Dry grassland type distributes higher zone of the center in coastal sand bars. Respectively, the coastal sand dune and salt marsh vegetation types were distributed ocean and inland on the frontier of it.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.18 no.4
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• pp.560-569
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• 2017

This study provides the theoretical basis for the self-management of a sports center based on the core competence and technology of the future. The following conclusions were obtained. First, in the influence of self-management on the future core competencies, interpersonal management, training management, and physical management, the factors of self-management have a significant influence on cognitive, affective, and social factors of future core competence. Second, in the influence of self-management on the social skill scale, interpersonal management, training management, and physical management factors of self-management have a significant influence on the self-assertion, self-control, and cooperation of the social technology scale. Third, cognitive, affective, and social factors of the future core competence have a significant influence on the self-assertion, self-control, and cooperation of the social skill scale in the influence of the future core competence on the social skill scale. To improve the self-management and social skills of leaders by maintaining good relationships with the members including fellow instructors, it is essential to take appropriate measures for self-management behaviors considering the individual characteristics and environments of leaders; it appears that effort is important.

• The Journal of Korean Association of Computer Education
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• v.22 no.5
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• pp.51-65
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• 2019

This study aims to provide educational implications for more strategic online software education by the types of online learning according to learners' self-regulated learning characteristics in the online software education environment and examining the characteristics of each type. For this, variables related to self-regulated learning characteristic were extracted from the log data of 809 students participating in the online software learning program of K University, and then analyzed using hierarchical cluster analysis. Based on hierarchical cluster analysis learner clusters according to the characteristics of self-regulated learning were derived and the differences between learners' learning characteristics and learning results according to cluster types were examined. As a result, the types of self-regulated learning of online software learners were classified as 'high level self-regulated learning type (group 1)', 'medium level self-regulated learning type (group 2)', and 'low level self-regulated learning type (group 3)'. The achievement level was found to be highest in 'high-level self-regulated learning type (group 1)' and 'low-level self-regulated learning type (group 3)' was the lowest. Based on these results, the implications for effective online software education were suggested.

• Korean journal of communication and information
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• v.62
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• pp.5-29
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• 2013

This study criticizes the neoliberal dominance in social web popular culture from a feminist perspective. A key question is to identify the nature of the social web popular culture-is it the repercussion or recapturing of feminism in relation to the social context of the prevalence of popular cultural practices of neoliberalism and how to challenge against neoliberal ideology with the critical positioning of feminism? In dealing with these questions, four celebrities' twitter discourses are analysed. The emphasis of smartness in digital mediascape, neoliberal imperative to be competitive, autonomous, positive and affirmative, and desire and fantasy brought by postfeminist lifestyle industries are embedded in the present popular culture. The critical account of neoliberal postfeminism suggests the necessity of an critical feminism which brings about alternative values to the current neoliberal demand for the active subject and consumer freedom of choice as the standard of ideal women.

• Journal of Internet Computing and Services
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• v.10 no.1
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• pp.135-143
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• 2009

The purpose of this study was to explore factors that affected the satisfaction of students' experiences in an education course, with the educational method and educational technology designed with a blended learning strategy. Blended learning is currently recognized as a good solution for the problems posed by both online and face-to-face learning, because it has features like flexibility and accessibility by using tools supporting both individualization and socialization. This study is one case that illustrates how blended learning can be applied at the university level. Subjects were 56 students who had participated in the class and responded to the survey questions. The gathered data were analyzed by using Factor Analysis and the Structural Equation Model. Based on the results of Factor Analysis, data revealed 5 factors: learning motivation, previous experience, ability to use information & technology, capability of self-regulated learning, and learning satisfaction. The results of the Structural Equation Model revealed causal relationships among the aforementioned factors as follows: (a) there was a statistically meaningful causal relationship between "learning motivation" and "capability of self-regulated learning", (b) there was a statistically meaningful casual relationship between "previous experience" and "capability of self-regulated learning", and (c) "capability of self-regulated learning" directly affected "learning satisfaction".

• Journal of the Korea Convergence Society
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• v.8 no.5
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• pp.107-115
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• 2017

The purpose of this study was to investigate the factors affecting the creativity of nursing college students who should act as professional nurses in the future. In order to carry out this research, the data collected through structured questionnaires were analyzed for 209 nursing college students who were approved by the IRB of K University. The results of this study showed that the creativity and self-efficacy(r=.374, p<.001), thinking ability(r=.347, p<.001), and school environment perception(r=.246, p<.001) were found to be positively correlated. In addition, the factors influencing the creativity of nursing students were self-efficacy(${\beta}=0.249$, p=.001), thinking ability(${\beta}=0.152$, p=.043), school environment perception(${\beta}=0.188$, p=.005) and the explanatory power of these variables was 21.2%. In the future, it will be necessary to develop educational methods for creativity development of nursing college students.

• Journal of Digital Convergence
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• v.15 no.5
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• pp.353-361
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• 2017

As one of Virtual Reality devices, HMD(Head-Mounted Device) helps users to experience an extended actual environment by providing them with virtual environment flexibly through the device. HMD considers user experience as importance as well as technical factors. Therefore, this study intended to analyze how the factors such as information quality, enjoyment, self-efficacy can have influence on the adoption of VR device using the extended technology acceptance model. The results showed that information quality and enjoyment have significant influences on perceived ease of use and usefulness. Self-efficacy only affect perceived ease of use. In addition, perceived ease of use and usefulness have influences on intention to use.