• Digital Contents
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• no.6 s.121
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• pp.34-36
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• 2003

정보통신부는 1/4분기 디지털콘텐츠 대상에 영구아트의 'D-WAR', 아리수미디어의 '아리수 한글', 엔파인의 '아이클릭아트'를 선정했다.영상부문 수상작인 영구아트의 D-WAR는 개그맨 심형래씨가 제작중인 컴퓨터그래픽을 가미한 SF영화로, 지난 99년 제작에 들어가 내년 7월 전 세계에서 개봉될 예정이다. 엔파인의 '아이클릭아트'는 광고, 웹, 출판, 인쇄, 팬시, 교육 등에 사용되는 다양한 포토, 이미지, 클립아트, 캐릭터 등을 제공하는 디지털 이미지 포탈사이트(www.iclickart.co.kr)로 지난해 11월 미국에 수출돼 50만달러의 실적을 올리고 있다

• Progress in Medical Physics
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• v.25 no.1
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• pp.23-30
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• 2014

The purpose of this study is to evaluate the developed dose verification program for in vivo dosimetry based on transit dose in radiotherapy. Five intensity modulated radiotherapy (IMRT) plans of lung cancer patients were used in the irradiation of a homogeneous solid water phantom and anthropomorphic phantom. Transit dose distribution was measured using electronic portal imaging device (EPID) and used for the calculation of in vivo dose in patient. The average passing rate compared with treatment planning system based on a gamma index with a 3% dose and a 3 mm distance-to-dose agreement tolerance limit was 95% for the in vivo dose with the homogeneous phantom, but was reduced to 81.8% for the in vivo dose with the anthropomorphic phantom. This feasibility study suggested that transit dose-based in vivo dosimetry can provide information about the actual dose delivery to patients in the treatment room.

• Journal of Biomedical Engineering Research
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• v.18 no.1
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• pp.9-16
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• 1997

We develop an automatic imaging matching technique for combining portal image and simulator image for improvements in localization of treatment in radiation therapy. Fusion of images from two imaging modalities is treated as follows. We archive images thxough a frame-yabber. The simulator and portal images are edge detected and enhanced with interpolated adaptive histouam equalization and combined using geometrical parameters relating the coordinates of two image data sets which are calculated using Fourier descriptors. We don't use any kind of imaging markers for patient's convenience. clinical use of this image matching technique for treatment planning will result in improvements in localization of treatment volumes and critical structures. These improvements will allow greater sparing of normal tissues and more precise delivery of energy to the desired irradiation volume.

• 한국HCI학회:학술대회논문집
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• 2008.02b
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• pp.629-633
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• 2008

In Korean society, digital contents such as VCC has introduced a new medium of advertisement and has become a culture. This research aims to investigate consumer characteristics for different types of consumption patterns for services dealing with digital contents. A total of 96 statements were extracted from literature review and popular press articles and 39 participants participated in this study. The results show 6 types of consumption patterns: Gak-jang-ee, Second-level Celebrity, Viewers, Politicians, Humanists, and Paris Hilton. These groups demonstrate consumer's behavioral characteristics and personal values. This study is meaningful in that it provides an insight for marketing strategies for corporations dealing with digital contents such as VCC.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2017.11a
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• pp.8-10
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• 2017

지상파 UHD 방송은 시청자에게 기존 HD 방송화면보다 4배 더 선명한 영상 서비스를 제공하며, 광대역 통신망과 결합한 홈포탈(Home Portal) 서비스를 통해서 다양한 부가서비스를 지상파 방송과 함께 제공할 수 있다. 본 논문에서는 지상파 UHD TV 방송과 연계된 360도 가상현실(VR; Virtual Reality) 부가서비스 시스템과 이를 효과적으로 시청하기 위한 사용자환경을 제안한다. 방송의 ESG(Electronic Service Guide)를 통해 시청자는 VR 부가서비스임을 확인하고 스마트 단말기 또는 HMD(Head Mount Display) 등을 이용하여 마치 현장에 있는 듯한 체험을 즐길 수 있다. 제안한 부가서비스는 앱 형태로 스마트 단말기에 설치하여 실행하며 지상파 UHD TV의 ESG 정보로부터 프로그램 편성과 VR 지원여부를 확인한다. 이를 통해, 실시간 방송 뿐 아니라 VOD 형태로 제공되는 다양한 비디오 및 오디오 콘텐츠를 극장에서 보는 것과 같은 빅스크린 모드, 360도 VR 모드, 오디오 청취모드 등 다양한 시청환경에서 감상할 수 있다. 제안한 사용자 환경은 게임엔진을 기반으로 개발되어 가상의 시청 공간에서 장소를 이동하며 영상, 음향 등 미디어 콘텐츠를 감상할 수 있다. 전용컨트롤러를 이용하면 다양한 인터액티브 콘텐츠를 효과적으로 운용하여 감상할 수 있으며, 일반적으로 통용되는 VR 기기 제어 모드도 지원하여 HMD나 일반 스마트 단말기 어느 것을 이용해서도 용이하게 사용자 메뉴를 선택할 수 있다. 제안된 시스템의 시제품은 IBC 2017 및 평창 ICT 체험관을 통해 발표되었다.

• Progress in Medical Physics
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• v.25 no.4
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• pp.281-287
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• 2014

The Winston Lutz test, which checks the accuracy of the isocenter for stereotactic radiosurgery (SRS), was performed with the commercial electronic portal imaging device (EPID). The usual Winston Lutz test with film was also performed for comparison with the test with EPID. The maximum difference in isocenter between the two methods was 0.32 mm. The Winston Lutz test using EPID is practical as it can reduce time and avoid human errors compared to the test with film.

• Proceedings of the Korea Information Processing Society Conference
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• 2010.04a
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• pp.1090-1093
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• 2010

최근, 웹 기반의 협업 연구 포탈 서버를 통해 여러 과학 분야에서 생산되는 데이터의 공유 및 가공, 분석, 시각화 등의 서비스가 제공되고 있다. 제주도 고산관측소를 비롯한 각 지역에서 수집된 환경자료를 효과적으로 공유 및 활용하는 시스템의 부재로 인하여 관련 연구자들의 긴밀한 협업 연구가 제대로 이루어지지 않고 있는 실정이다. 본 연구는 국내외의 여러 위성으로부터 획득한 위성영상, ABC를 통하여 수집한 지상 관측자료 등의 지구환경 데이터를 효율적으로 저장 관리하고, ABC Geo-Scientist들이 이를 효과적으로 활용할 수 있는 Gridsphere 기반 GeoNet 웹 협업 환경을 구축하는데 그 목적이 있다.

• The Journal of Korean Society for Radiation Therapy
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• v.35
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• pp.15-21
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• 2023

Purpose: The purpose of this study is to compare the performance of the anisotropic analytical algorithm (AAA) and portal dose image prediction (PDIP) for patient-specific quality assurance based on electronic portal imaging device, and to evaluate the clinical feasibility of portal dosimetry using AAA. Subjects and methods: We retrospectively selected a total of 32 patients, including 15 lung cancer patients and 17 liver cancer patients. Verification plans were generated using PDIP and AAA. We obtained gamma passing rates by comparing the calculated distribution with the measured distribution and obtained MLC positional difference values. Results: The mean gamma passing rate for lung cancer patients was 99.5% ± 1.1% for 3%/3 mm using PDIP and 90.6% ± 5.8% for 1%/1 mm. Using AAA, the mean gamma passing rate was 98.9% ± 1.7% for 3%/3 mm and 87.8% ± 5.2% for 1%/1 mm. The mean gamma passing rate for liver cancer patients was 99.9% ± 0.3% for 3%/3 mm using PDIP and 96.6% ± 4.6% for 1%/1 mm. Using AAA, the mean gamma passing rate was 99.6% ± 0.5% for 3%/3 mm and 89.5% ± 6.4% for 1%/1 mm. The MLC positional difference was small at 0.013 mm ± 0.002 mm and showed no correlation with the gamma passing rate. Conclusion: The AAA algorithm can be clinically used as a portal dosimetry calculation algorithm for patientspecific quality assurance based on electronic portal imaging device.

• Journal of Engineering Education Research
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• v.4 no.1
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• pp.88-98
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• 2001

This paper proposes a new direction of technical highschool in Korea and presents a network model for technical highschool. As a distributed intelligent portal, the network model connects to anywhere and consists of simulated practical exercise in a school's self portal intranet. A title of the simulated practice contents developed in a school would be posted on any open site connected to the network model so that anyone who want to use it in his/her practice class could download to his/her intranet portal site. This mechanism works in two good ways. One is a wide area networkness and another is an easy utilization of broad band width since teacher could use the contents in his/her school's own intranet band width. The paper also emphasize that teachers and educators should make an effort to develop good quality meta-contents.

• The Journal of the Korea Contents Association
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• v.7 no.11
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• pp.120-129
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• 2007

As the Internet is more embedded in people's lives, users draw on new Internet applications to express themselves through user-created contents(UCC). UCC is defined as content that is made publicly available over the Internet, reflects a certain amount of creative effort and is created outside of professional practices. This study describes the rapid growth of UCC as well as its increasing role in network-based communication. Based on the definition of UCC and the structure of emerging value chain, a taxonomy of UCC businesses is presented : UCC e-marketing business, UCC publishing business, UCC e-retailing business, and UCC development software business. This paper concludes with implications for platform and internet access providers.