• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
• /
• 2013.05a
• /
• pp.638-641
• /
• 2013

In college, you can view the online quiz through the cyber education, and online learning. However, if there is no computer has a problem that can not be many students it is in place or not the Internet watch online quizzes. In recent years, many college students have a smart phone, from anywhere, using smartphone, you have utilized various Web surfing, news, and Messenger. In addition, office workers and students, have to learn to put to PDF necessary materials through the smartphone. Advantage of smart phones, have a feature that can be easy to carry and use anywhere at any time. Online learning from anywhere via a smart phone, so that you can see the online quizzes, in this paper, the system that not only online quizzes through a smartphone using the Hybrid-App, you can see in real time the results and scores of the person I proposed.

• Proceedings of the Korea Information Processing Society Conference
• /
• 2008.11a
• /
• pp.397-400
• /
• 2008

무한히 발생되는 실시간 데이터와 디스크에 저장된 히스토리컬 데이터를 동시에 처리하는 하이브리드 질의에 관한 연구가 활발히 이루어지고 있다. 하이브리드 질의는 디스크에 저장된 대용량의 공간 데이터 처리를 위해 빠른 디스크 입/출력을 요구한다. 이러한 데이터를 처리하기 위해 인덱스, 데이터 축소 기법등이 연구되었다. 데이터의 빠른 검색을 위한 인덱스 기법은 디스크에 분산 저장된 데이터에 대한 탐색 비용과 입/출력 비용을 줄이지 못한다. 또한, 샘플링을 통해 디스크 입/출력 시간 비용을 줄이는 데이터 축소 기법은 데이터의 정확성을 떨어뜨려 정확성을 요구하는 하이브리드 질의에서는 이용하기가 어렵다. 이논문에서는 디스크 입/출력 시간과 디스크 탐색 시간 비용을 줄이고, 정확성을 보장하는 과거 공간질의 처리를 위한 고속로딩 기법을 제아난다. 제안기법은 공간을 그리드 형태로 나누고 인접한 공간 데이터를 함께 관리함으로써 디스크 입/출력 비용을 줄 일 수 있다. 또한, 공간적으로 인접한 데이터를 물리적으로 인접한 곳에 저장하여 디스크 탐색시간 비용을 줄일 수 있다. 이렇게 저장된 데이터는 손실 없이 모두 저장되며, 정확성 또는 보장할 수 있다.

• The Journal of the Convergence on Culture Technology
• /
• v.8 no.1
• /
• pp.121-129
• /
• 2022

This study explored effective teaching-learning activities under the hybrid teaching model combining flipped learning, direct instruction, cooperative learning and distance learning. Subjects were 99 college students enrolled in 2 teacher preparation courses. Students evaluated effectiveness of 22 teaching-learning activities according to Likert scale at the end of the semester. As a result, all 22 teaching learning activities were considered effective more or less. They facilitated motivation, comprehension, participation, thinking, and led to mastery of the task. ② Activities scored low were 'questioning and answering at the beginning of online class', 'open book test'. ③ Hybrid teaching model was favored over traditional instruction. Open ended responses were consistent with the ones in the questionnaire. This research supports the notion that key teaching models to be combined for successful flipped learning in college setting are direct instruction and cooperative learning. Furthermore, effective and ineffective teaching strategies for flipped learning were found.

• Proceedings of the Korea Information Processing Society Conference
• /
• 2020.11a
• /
• pp.575-578
• /
• 2020

최근 교육부는 초등학교부터 중학교까지 정보통신기술(ICT)와 인공지능(AI)에 관한 소양을 길러주기 위해 AI, VR 등 최첨단 기술을 적용한 '지능형 과학실'을 2024년까지 모든 학교에 구축할 방침이라고 한다. 하지만 국내 VR 교육은 학년별, 교과과정에 맞춘 콘텐츠가 부족하고, VR 교육 전용 LMS(학습관리 시스템)의 부재로 현실로 도입하기에 부족하다. 본 논문에서는 VR 교육 특성에 맞는 LMS 대안과 10분 내외의 VR 체험을 뒷받침할 맞춤 콘텐츠로서 'Web & VR Hybrid Content'를 제안한다.

• Journal of the Semiconductor & Display Technology
• /
• v.16 no.3
• /
• pp.31-35
• /
• 2017

We have fabricated flexible and stretchable pressure sensors using silver nanowires (AgNWs) and analyzed their electric responses. AgNWs are spray coated directly onto uncured polydimethylsiloxane (PDMS) such that AgNWs penetrate into the uncured PDMS, enhancing the adhesion properties of AgNWs. However, the single-layered AgNW sensor exhibits unstable electric response and low pressure sensitivity. To tackle it, we have coated a conductive polymer, poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) onto the AgNW layer. Such a hybrid bilayer sensor ensures a stable electric response because the over-coating layer of PEDOT:PSS effectively suppresses the protrusion of AgNWs from PDMS during release. To enhance the sensitivity further, we have also fabricated a stacked bilayer AgNW sensor. However, its electric response varies depending sensitively on the initial overlap pressure.

• Journal of the Korea Academia-Industrial cooperation Society
• /
• v.12 no.4
• /
• pp.1575-1580
• /
• 2011

A key factor in the study of hybrid vehicle is to enhance the usability of energy. The paper introduces the monitor and controlling technology of hybrid vehicle that can process the relevant information considering the structure of power system and driving strategies simultaneously, and can monitor its results. This technology, so called HEV algorithm analysis, has been applied to PRIUS THS made by Toyota Co. LTD. This model is adapted to parallel hybrid type. It has a somewhat comlex structure, but has several merits. It's energy loss is lower when conversing. and also it is easily applied to the conventional vehicle having a gasoline engine without any overall changing of its structure, and so on. This monitor and controlling technology is very useful to study on the various driving strategies of hybrid vehicle for maximizing the usability between engine and electric motor.

• Journal of Korean Library and Information Science Society
• /
• v.32 no.3
• /
• pp.353-395
• /
• 2001

Academic libraries presently are confronting the issues of organizational viability and relevance. Academic libraries are not the sole owners of the information gateway. The purpose of this study is modeling of university library's information service for effective implication of its role in order to ensure organizational viability and relevance in internet environment. New information service model of university library needs to be design according to four Principles. Firstly, building of web based library petals. Secondly, provision of web front-end with hybrid functions. Thirdly, provision of information literacy program Fourthly, extension resource sharing.

• The Journal of Korean Association of Computer Education
• /
• v.4 no.1
• /
• pp.43-52
• /
• 2001

The aim of this paper is to develop a network-based collaborative learning system based on cooperative learning, computer simulation, role playing, and web-based instruction, which is called NetClass. It is an educational system of hybrid-type, and supports three learning modes as a distributed network, a stand-alone system, or a web browser. To accomplish the purpose of this paper, we have studied on the following topics. First, we selected appropriate learning contents among dilemmas on information ethics. Second, a Collaborative Dilemma-solving Learning Model (CDLM) was designed, and this model means systematic procedures that leaners can notice others' feeling and thinking and predict the results of his actions by introducing interactions among learners on computer networks. Third, Collaborative Learning System Model based on standard architecture of an educational system was proposed. Fourth, we developed many components such as network components, database components, and interface components.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
• /
• 2009.10a
• /
• pp.571-573
• /
• 2009

Mobile Ad-hoc Network(MANET) needs efficient node management because the wireless network has energy constraints. Mobility of MANET would require the topology change frequently compared with a static network. To improve the routing protocol in MANET, energy efficient routing protocol would be required as well as considering the mobility would be needed. Previously proposed a hybrid routing CACH prolong the network lifetime and decrease latency. However the algorithm has a problem when node density is increase. In this paper, we propose a new method that the CACHE(Context-aware Clustering Hierarchy and Energy efficient) algorithm. The proposed analysis could not only help in defining the optimum depth of hierarchy architecture CACH utilize, but also improve the problem about node density.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
• /
• 2009.05a
• /
• pp.277-280
• /
• 2009

Mobile Ad-hoc Network(MANET) could provide the reliable monitoring and control of a variety of environments for remote place. Mobility of MANET would require the topology change frequently compared with a static network. To improve the routing protocol in MANET, energy efficient routing protocol would be required as well as considering the mobility would be needed. In this paper, we propose a new method that the CACH(Context-aware Clustering Hierarchy) algorithm, a hybrid and clustering-based protocol that could analyze the link cost from a source node to a destination node. The proposed analysis could help in defining the optimum depth of hierarchy architecture CACH utilize. The proposed CACH could use localized condition to enable adaptation and robustness for dynamic network topology protocol and this provide that our hierarchy to be resilient.