• Journal of The Korean Association of Information Education
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• v.17 no.1
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• pp.93-100
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• 2013

Currently the mose used software to make presentation is Powerpoint. But a few learners only can use that program to present. Lately free software called Prezi is available to many users. Prezi is free to general users. To evaluate the experiences of making presentaion by Powerpoint and Prezi effects on the learning motive is the purpose of study. In conclusion, my goal of this study is that by using convenient Prezi, I would like to prove that it will really analyze the learning motives(attention, relevance, confidence, satisfaction) when learners is being thaught through Prezi not unuseful Powerpoint.

• Journal of KIISE
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• v.42 no.10
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• pp.1254-1267
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• 2015

Recently, excessive installations of APs have caused WLAN interference, and many techniques have been suggested to solve this problem. The AP aggregation technique serves to reduce active APs by moving station connections to a certain AP. Since this technique forcibly moves station connections, the transmission performance of some stations may deteriorate. The AP transmit power control technique may cause station disconnection or deterioration of transmission performance when power is reduced under a certain level. The combination of these two techniques can reduce interference through AP aggregation and narrow the range of interferences further through detailed power adjustment. However, simply combining these techniques may decrease the probability of power adjustment after aggregation and increase station disconnections upon power control. As a result, improvement in performance may be insignificant. Hence, this study suggests a scheme to combine the AP aggregation and the AP transmit power control techniques in OpenFlow-based WLAN to ameliorate the disadvantages of each technique and to reduce interferences efficiently by performing aggregation for the purpose of increasing the probability of adjusting transmission power. Simulations reveal that the average transmission delay of the suggested scheme is reduced by as much as 12.8% compared to the aggregation scheme and by as much as 18.1% compared to the power control scheme. The packet loss rate due to interference is reduced by as much as 24.9% compared to the aggregation scheme and by as much as 46.7% compared to the power control scheme. In addition, the aggregation scheme and the power control scheme decrease the throughput of several stations as a side effect, but our scheme increases the total data throughput without decreasing the throughput of each station.

• Proceedings of the Korean Society of Computer Information Conference
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• 2009.01a
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• pp.101-105
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• 2009

현재 Powerpoint는 팀 프로젝트에도 불구하고 PPT파일을 혼자서 만들고 수정해야 하면서 한 사람이 많은 시간을 소비해야한다. 또는 여러 명이서 각각의 페이지를 따로 만들고 한 사람이 각자가 만든 페이지를 받아 하나의 파일로 합쳐야하는데 이 방법은 비효율성과 불편함이 존재한다. 따라서 하나의 PPT파일을 여러 명이서 동시에 접속하여 각자의 페이지를 만들면서 시간도 절약하고 불편함과 비효율성을 제거하기 위하여 이 프로그램을 제안하였다.

• Proceedings of the Korean Information Science Society Conference
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• 2012.06d
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• pp.103-105
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• 2012

본 논문은 모바일 기기의 카메라를 이용하여 사용자 제스처 인식을 통한 발표용 소프트웨어를 제어하는 모바일 응용프로그램에 관한 연구결과이다. 여러 센서를 이용하는 키넥트와는 달리 항상 휴대하는 스마트폰의 카메라 센서만을 이용하여 사용자의 제스처를 인식하고, 파워포인트, PDF 등의 발표용 소프트웨어를 제어 한다. 본 연구에서 개발한 어플리케이션으로 제스처 인식을 통해 파워포인트와 PDF를 제어 하였으며, 실제 모바일 환경에서 실시간으로 적용됨을 확인 하였다.

• Proceedings of the Korean Society of Computer Information Conference
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• 2014.07a
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• pp.33-34
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• 2014

본 논문에서는 Kinect 기반의 모니터 제어 기법을 설계하고 구현한다. 이 기법은 Kinect의 Joint 기능을 활용하여 신체의 구조를 인식하고 손과 머리의 Joint를 받아온다. Kinect의 카메라는 손 동작을 추적하여 Joint 신체 부위에 해당하는 Joint 값을 모니터의 좌표 값으로 변환함으로써 손 동작에 따라 마우스를 움직이는 기능을 구현한다. 그리고 파워포인트에서 사용하는 F5, Esc, Right, Left 키에 대하여 Joint의 좌표 값이 일정 범위를 초과하면 마우스 클릭 이벤트를 발생하도록 구현함으로써 파워포인트의 슬라이드 화면을 제어하는 기능을 구현한다.

• Proceedings of the Korea Information Processing Society Conference
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• 2013.11a
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• pp.1653-1656
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• 2013

본 논문에서는 키넥트를 사용하여 제스처를 인식해 프리젠테이션이 가능한 인터페이스를 제작하였다. 키넥트 카메라는 Microsoft Kinect SDK1.7 라이브러리를 사용해서 신체의 좌표값을 받아 손의 위치와 손의 제스처를 인식하는데 사용했으며, 파워포인트를 제어하기 위해 후킹 기능을 사용한다. 기존 키넥트에서 사용하던 제스처인 sweep을 기본으로, grip과 push 제스처로 프리젠테이션에 필요한 기능을 추가했다. 제스처 인식의 결과를 후킹을 통해 파워포인트로 전달해서, 슬라이드의 이동 뿐 아니라 메모 기능과 지우기 기능이 추가된 인터페이스를 제공한다. 인터페이스는 발표자의 발표능력 향상과 더불어, 제스처 인식 인터페이스를 타 콘텐츠에 적용이 가능하므로 추후 콘텐츠의 제작 및 상용화가 가능하다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2016.10a
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• pp.239-242
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• 2016

In recent years, Unmanned Aerial Vehicles (UAV) have been developed for both military and civilian activities in regions where the presence of onboard human pilots is risky or not necessary. However, UAV require a high demand of power to achieve its missions such as taking images/videos in a certain area or surveillance activities. Therefore, this situation triggers the need of techniques to reduce power consumption for UAV to complete its mission safely. One of the methods is to use a waypoint optimization procedure which deals with a pre-specified set of waypoints to find a minimum route to fly through those waypoints in order to reduce power consumption. In this paper, due to the UAV's multidisciplinary which makes it impossible to be represented as an analytical model, we design a simulation model of UAV using MATLAB Simulink and AeroSim Blockset, an analysis package in aerospace industry. The simulation model is then coupled with optimization algorithms along with a set of waypoints (flight path) in order to measure at which percentage power consumption can be minimized for UAV.

• Proceedings of the Korea Multimedia Society Conference
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• 2002.11b
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• pp.451-456
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• 2002

본 연구에서는 캐릭터 에이전트 기반 프리젠테이션 모델을 설계하였다. 캐릭터는 인간 대화의 특성을 반영하여 직관적이고 효과적인 커뮤니케이션 방식을 가진다. 그 적용사례로 마이크로소프트 에이전트를 파워포인트에 구현하여 보다 자연스럽고 인간적이며 직관적인 상호작용을 보인다.

• Journal of Digital Contents Society
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• v.15 no.2
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• pp.173-179
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• 2014

Useful It is very crucial to establish the learning environment with a creative technology for those who are going to learn English in terms of multimedia presentation. This kind of technologies make it possible for students to practice English suitable with their level and compatible with lesson plan. English grammar plays a leading role to study English as a second language for the language is required to master the structure, part of speech, and tense. The purpose of this study is to explore the a innovative English teaching and learning approach based on the multimedia presentation to teach English grammar with an effect for those students are studying English, when they are learning English grammar with power point or complex multimedia presentation.

• Journal of The Korean Association of Information Education
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• v.19 no.4
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• pp.509-516
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• 2015

As the interest in Education for Sustainable Development (ESD) increases worldwide in and around UNESCO, the aids for IT equipment and the donations for educations to developing countries are being active. Through Powerpoint-based teaching and learning contents simply authored by teachers, Mischief can be used to help many children in self-driven class activities. In this paper, we developed an additional program to control mouse pointers of Mischief with image files, size, and speed factors. Then we applied them to elementary students for enhancing their interest and participation to class activities.