• 한국농공학회논문집
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• 제58권2호
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• pp.21-29
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• 2016

This study conducted a basic design of system and interface which provide both of spatial and non-spatial data for water hazard information management. This helps to decide directions of the future integrated water hazard information platform and possible technical examinations of the web-based system for the realization of the prototype. For user friendly system, this study did a survey to investigate the data format, service environment, image processing level and visualization type that users prefer. Also, authorization range was set up by type of the user group. In the water hazard information platform, the data and analysis algorithm were classified by the fields. Furthermore, the platform was consisted with six block systems according to the function and the interface and designed to flexibly mount or modify the additional functions. For a basic design of the data exchange method and protocols, a prototype was constructed by using the spatial information web service technology. The portal service system to visualize and provide spatial data was designed by the WMS/WFS type of OGC standard interface and the FTP/HTTP interface type through open source GIS software for server environment.

• 한국과학교육학회지
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• 제42권2호
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• pp.177-184
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• 2022

This article aims to explain the concept and characteristics of the 'Intelligent Science Lab', which is being promoted nationwide in Korea since 2021. The Korean Ministry of Education creates a master plan containing a vision for science education every five years. The most recently announced '4th Master plan for science education (2020-2024)' emphasizes the policy of setting up an 'intelligent science lab' in all elementary and secondary schools as an online and offline space for scientific inquiry using advanced technologies, such as Internet of Things and Augmented and Virtual Reality. The 'Intelligent Science Lab' project is being pursued in two main directions: (1) developing an online platform named 'Intelligent Science Lab-ON' that supports science inquiry classes, and (2) building a science lab space in schools that encourages active student participation while utilizing the online platform. This article presents the key features of the 'Intelligent Science Lab-ON' and the characteristics of intelligent science lab spaces newly built in schools. Furthermore, it introduces inquiry-based science learning programs developed for intelligent science labs. These programs include scientific inquiry activities in which students generate and collect data ('data generation' type), utilize datasets provided by the online platform ('data utilization' type), or utilize open and public data sources ('open data source' type). The Intelligent Science Lab project is expected to not only encourage students to engage in scientific inquiry that solves individual and social problems based on real data, but also contribute to presenting a model of online and offline linked scientific inquiry lessons required in the post-COVID-19 era.

• Advances in robotics research
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• 제2권2호
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• pp.113-127
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• 2018

Robotics and automation are rapidly growing in the industries replacing human labor. The idea of robots replacing humans is positively influencing the business thereby increasing its scope of research. This paper discusses the development of an experimental platform controlled by a robotic arm through Robot Operating System (ROS). ROS is an open source platform over an existing operating system providing various types of robots with advanced capabilities from an operating system to low-level control. We aim in this work to control a 7-DOF manipulator arm (Robai Cyton Gamma 300) equipped with an external vision camera system through ROS and demonstrate the task of balancing a ball on a plate-type end effector. In order to perform feedback control of the balancing task, the ball is designed to be tracked using a camera (Sony PlayStation Eye) through a tracking algorithm written in C++ using OpenCV libraries. The joint actuators of the robot are servo motors (Dynamixel) and these motors are directly controlled through a low-level control algorithm. To simplify the control, the system is modeled such that the plate has two-axis linearized motion. The developed system along with the proposed approaches could be used for more complicated tasks requiring more number of joint control as well as for a testbed for students to learn ROS with control theories in robotics.

• 한국산학기술학회논문지
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• 제11권8호
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• pp.3005-3011
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• 2010

최근 고성능의 스마트 폰이 속속 등장하면서 스마트 폰의 보안 문제가 대두되고 있다. 특히 오픈 플랫폼의 경우엔 더욱 바이러스의 타겟이 되기 쉬워졌다. 또한, 시만텍, 안철수연구소 등 많은 보안솔루션 업체들이 모바일 보안 시스템을 개발하고 있지만, 아직 Android 관련 보안 프로그램은 상용화된 제품이 없는 실정이다. 이러한 문제를 사전에 해결하기 위해 오픈 플랫폼 중의 하나인 Android 상에 일반 Linux에서 동작하는 SELinux를 사용할 수 있도록 환경을 구축하여 Android 시스템의 보안 기능을 개발하였으며, S3C6410 상에서 사용자 어플리케이션을 검증하였다.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2012년도 춘계학술대회
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• pp.360-363
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• 2012

최근 에너지 소비의 지속적 증가 및 에너지 가격의 급격한 상승으로 그린 IT 도입 운영이 필수적인 요소로 인식됨에 따라 서버 발열 및 데이터센터 에너지 절감을 위해 IT 인프라가 클라우드 컴퓨팅 플랫폼으로 대체 되어가고 있다. 본 연구에서는 오픈 소스 기반 클라우드 플랫폼을 구축하고 클라우드 VDI 서비스 제공 시 클러스터링을 이용하여 사용자 인스턴스의 성능을 보장하기 위한 자원 스케줄링 알고리즘을 제안하였다.

• IEIE Transactions on Smart Processing and Computing
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• 제5권4호
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• pp.289-293
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• 2016

As more mobile devices are equipped with multi-core CPUs and are required to execute many compute-intensive multimedia applications, it is important to optimize the systems, considering the underlying parallel hardware architecture. In this paper, we implement and optimize ray-tracing application tailored to a given mobile computing platform with multiple heterogeneous processing elements. In this paper, a lightweight ray-tracing application is specified and implemented in Kahn process network (KPN) model-of-computation, which is known to be suitable for the description of real-time applications. We take an open-source C/C++ implementation of ray-tracing and adapt it to KPN description in the Distributed Application Layer framework. Then, several possible configurations are evaluated in the target mobile computing platform (Exynos 5422), where eight heterogeneous ARM cores are integrated. We derive the optimal degree of parallelism and a suitable distribution of the replicated tasks tailored to the target architecture.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2012년도 추계학술대회
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• pp.793-796
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• 2012

최근 에너지 소비의 지속적 증가 및 에너지 가격의 급격한 상승으로 그린 IT 도입 운영이 필수적인 요소로 인식됨에 따라 서버 발열 및 데이터센터 에너지 절감을 위해 IT 인프라는 클라우드 컴퓨팅 플랫폼으로 대체 되어가고 있다. 본 연구에서는 일반 저비용 웹서비스 인프라를 오픈소스 기반 클라우드 플랫폼으로 변환하고 Linux Virtual Server 로드 밸런싱을 구현하여 그 성능을 분석하였다.

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2012년도 추계학술발표대회
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• pp.142-144
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• 2012

Tizen은 삼성전자와 인텔(Intel), 리눅스 재단(Linux Foudation)이 공동으로 개발한 리눅스(Linux) 기반의 오픈 소스 플랫폼(Open Source Platform)이다. Tizen은 스마트폰(Smart Phone)과 태블릿 PC(Tablet PC)를 위한 운영체제이지만 GPS(Global Positioning System) 내비게이션을 포함한 자동차 인포테이먼트(In-Vehicle Infotainment) 시스템과 넷북(Netbook), 스마트 TV(Smart TV)에서도 사용될 수 있도록 개발되었다. Tizen은 안드로이드(Android)와 마찬가지로 리눅스 커널(Kernel)에서 실행할 수 있지만, 소프트웨어 프레임워크(Software Framework)는 HTML5(Hypertext Mark-up Language 5)로 설계되었다. 또한 Tizen은 HTML5 를 기반으로 다른 플랫폼에서도 쉽게 호환될 수 있는 웹 어플리케이션의 실행을 지원한다는 특징을 갖고 있다. 본 논문에서는 Tizen 웹 어플리케이션 개발의 기반이 되는 HTML5 API 와 Tizen 웹 API 를 중점적으로 살펴 본다. 그리고 이 두 가지 핵심 요소에 대한 이해를 통해 Tizen 의 향후 발전가능성을 조명한다.

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2012년도 춘계학술발표대회
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• pp.336-339
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• 2012

VTK is a free but professional development platform for images three-dimensional (3D) reconstruction and processing. It is powerful, open-source, and users can customize their own needs by self-development of great flexibility. To give the doctors more and detailed information by simulate dissection to the 3-D brain MRI image after reconstruction. A Visualization System (VS) is proposed to achieve 3D brain reconstruction and virtual dissection functions. Based on the free VTK visualization development platform and Visual Studio 2010 IDE development tools, through C++ language, using real people's MRI brain dataset, we realized the images 3D reconstruction and also its applications and extensions correspondingly. The display effect of the reconstructed 3D image is well and intuitive. With the related operations such as measurement, virtual dissection and so on, the good results we desired could be achieved.

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2011년도 추계학술발표대회
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• pp.52-55
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• 2011

Embedded system developers use design and testing tools to make their product faster. Previously developed a virtual development environment for embedded software (VDEES) using open source software, mainly the SID simulation framework for a simulator engine and the Eclipse platform for a development platform. VDEES enables developers to develop SID Component in C++. A bridge module for developing SID Component in Java has been developed and available. However, using this module, developers have to build their SID Java component from scratch. In this work, we developed SID Java Component Builder Plug-in as an additional features to VDEES. This tools enables developers to build SID Component in Java faster and easier.