• 대한전기학회:학술대회논문집
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• 대한전기학회 1999년도 하계학술대회 논문집 G
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• pp.3249-3252
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• 1999

In this paper, we present the Tele-PACS of radiology, which uses the communication network as asymetric satellite data communication system. The asymetric satellite data communication system uses receive-only satellite links for data delivery and PSTN(Public Switched Telephone Network) modem or N-ISDN(Integrate Services Digital Network) for communication. The satellite communication linking shows the very high-speed performance than terrestial linking such as 28.8 kbps modem linking and 56Kbps linking. The satellite linking is 5 - 10 times faster than the 56Kbps linking. We conclude that 1) Satellite networking is currently the cheapest and fastest solution for internet access. 2) Web-based Image-Viewer enables small size hospitals in rural area to connect to central PACS easily and to retrieve the image data reliably. 3) The suggested teleradiology system using satellite networking could be adequate to fast telemedicine and telecare for rural hospitals especially located in geographically isolated areas such as islands.

• 국제학술발표논문집
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• The 6th International Conference on Construction Engineering and Project Management
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• pp.665-666
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• 2015

Recently BIM technology has been expanded for using in construction project. However its spread has been delayed than the initial expectations, due to the high-cost of BIM infrastructure development, the lack of regulations, the lack of process and so forth. In construction site phase, especially the analysis of current research trend about IT technologies, virtualization and BIM service, data exchange such as drawing, 3D model, object data, properties using cloud computing and virtual server system is defined as a most successful solution. The purpose of this study is enable the cloud computing BIM server to provide several main function such as edit a model, 3D model viewer and checker, mark-up, snapshot in high-performance quality by proper design of VDI system. Concurrent client connection performance is a main technical index of VDI. Through test-bed server client, developed VDI system's multi-connect control will be evaluated. The performance-test result of BIM server VDI will effect to development direction of cloud computing BIM service for commercialization.

• 센서학회지
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• 제27권3호
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• pp.186-191
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• 2018

Smart textile industries have been precipitously developed and extended to electronic textiles and wearable devices in recent years. In particular, owing to an increasingly aging society, the elderly healthcare field has been highlighted in the smart device industries, and pressure sensors can be utilized in various elderly healthcare products such as flooring, mattress, and vital-sign measuring devices. Furthermore, elderly healthcare products need to be more lightweight and flexible. To fulfill those needs, textile-based pressure sensors is considered to be an attractive solution. In this research, to apply a textile to the second layer using a pressure sensing device, a novel type of conductive textile was fabricated using vapor phase polymerization of poly(3,4-ethylenedioxythiophene) (PEDOT). Vapor phase polymerization is suitable for preparing the conductive textile because the reaction can be controlled simply under various conditions and does not need high-temperature processing. The morphology of the obtained PEDOT-conductive textile was observed through the Field Emission Scanning Electron Microscope (FESEM). Moreover, the resistance was measured using an ohmmeter and was confirmed to be adjustable to various resistance ranges depending on the concentration of the oxidant solution and polymerization conditions. A 3-layer 81-point multi-pressure sensor was fabricated using the PEDOT-conductive textile prepared herein. A 3D-viewer program was developed to evaluate the sensitivity and multi-pressure recognition of the textile-based multi-pressure sensor. Finally, we confirmed the possibility that PEDOT-conductive textiles could be utilized by pressure sensors.

• 지능정보연구
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• 제16권4호
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• pp.147-157
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• 2010

아이폰의 등장과 함께 스마트 폰에 대한 관심이 높아지고, 통신사업자를 통해야만 가능했던 다양한 서비스가 스마트 폰을 통해서 직접 제공할 수 있는 환경이 가능해졌다. 전세계적으로 해외 관광객이 증가하면서 관광가이드 없이 자신의 노력으로 여행을 다니는 개인관광객도 증가하고 있다. 그러나 우리나라를 방문하는 외국인들이 개인적으로 여행을 즐기기에는 언어소통이나 제공되는 정보의 부족으로 어려움을 느끼고 있다. 본 연구에서는 스마트 폰이 탑재하고 있는 GPS와 WiFi 또는 3G 무선망을 통해서 사전에 설정된 관광 정보 카테고리에 따라서 관광객의 위치에 따른 관련 정보를 자동으로 제공함으로써 관광객의 편의성을 높이는 서비스 기술을 개발하였다. 개발된 서비스는 인사동을 대상으로 시험하였으며, 사용자의 선택과 같은 불편함 없이 주변정보를 제공함으로써 관광에 대한 편의성을 최대한 높였다.

• 한국해양공학회지
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• 제34권3호
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• pp.217-226
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• 2020

An offshore plant is an offshore platform that can process oil and gas resources in rough seas with a poor working environment. Moreover, it is a complex structure with different types of offshore facilities and a large amount of outfitting that connects different offshore installations. In particular, an enormous amount of various piping materials is installed in a relatively narrow space, and thus, the difficulty of working is relatively high compared to working in ships or ground plants. Generally, when the 3D detailed design is completed, an offshore plant piping process is carried out at the shipyard with ISO 2D fabrication drawings and ISO 2D installation drawings. If a worker wants to understand the three-dimensional piping composition in the working area, he can only use three-dimensional viewers that provide limited functionality. As offshore plant construction progresses, correlating work with predecessors becomes more complicated and rework occurs because of frequent design changes. This viewer function makes it difficult to identify the 3D piping structure of the urgently needed part. This study deals with the process support method based on a system using a 3D simulator to improve the efficiency of the piping process. The 3D simulator is based on the Unity3D engine and can be simulated by considering the classification and priority of 3D models by the piping process in the system. Further, it makes it possible to visualize progress information of the process. In addition, the punch content can be displayed on the 3D model after the pipe inspection. Finally, in supporting the data in relation to the piping process, it is considered that 3D-simulator-supported piping installing could improve the work efficiency by more than 99% compared to the existing method.

• 한국콘텐츠학회논문지
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• 제6권8호
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• pp.57-67
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• 2006

애니메이션은 제작에 있어 수용자의 지각에 반응하는 의도된 프레임 수(명멸현상)를 이용함으로써 움직임의 효과를 극대화 할 수 있다. 그러나 특정의 효과(경찰차의 경광등이나, 신호등의 점멸을 확대한 장면에서 빠른 점멸을 의도적으로 계획한 프레임 수)나 지나친 시각적 자극을 주기 위하여 배색에 있어서 채도의 대비를 높이는 경우는 매우 위험한 상황을 초래할 수도 있다. 일본의 '포켓몬스터' 방영에서 일어난 피해로 문제의 심각성이 대두된 명멸현상의 위험성은 의학용어로 '빛과민성 발작증세'로 정의되고 있다. 애니메이션의 제작에 있어서 컬러의 품질관리도 중요하지만 색채가 미치는 심리적인 요인을 분석한 컬러설정이라든가, 영상효과에 있어서 섬광과 패턴의 연속적인 점멸이 미치는 위험성을 제작단계에서 체크할 필요가 있음을 시사하고 있다. 연구자는 일본에서 사용 중인 영상 애니메이션 등의 제작기법에 관한 가이드라인을 포함, 국외의 관련규정들을 종합 검토하고 피험자를 대상으로 한 실험과 비교하여 명멸현상의 위험성에 대한 해결방안을 마련하였다.

• 융합신호처리학회논문지
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• 제17권1호
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• pp.40-45
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• 2016

디지털 데이터 방송의 전환에 따라, 시청자와의 상호작용을 위한 서비스 제공, 콘텐츠 및 채널의 수가 기하급수적으로 증가하고 있다. 이러한 다채널 시대에 전자 프로그램 안내(Electronic Program Guide, EPG)는 필수 요구 사항이며, 사용자의 요구에 따라 EPG 기술도 나날이 발전하고 있다. 그러나 현재 EPG는 기술 활용 부족, 표준 체계의 부재, 정확한 편성 정보 부재 등의 이유로 시청자들에게 외면 받고 있는 실정이다. 본 논문에서는 이러한 지상파방송국의 EPG 문제의 실태와 해결방안에 대해 서술한다. 이를 위해 지상파 직접 수신 방법을 이용하여 6개 지상파 채널에 대해 EPG 정보와 실제 방송 시간의 오차를 비교 분석 하였으며, 향후 EPG 정보의 정확성 향상방법을 모색한다.

• 한국건설관리학회논문집
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• 제20권2호
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• pp.86-94
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• 2019

건설프로젝트가 복잡화, 대형화됨에 따라 사업단계별 참여주체 간 의사소통 및 협업을 위해 BIM기술 도입이 가속화 되고, BIM을 활용한 효율적인 시각화 방식의 도입에 대한 사용자의 요구가 발생하고 있다. 이러한 요구에 따라 BIM과 NUI 융복합 기술의 세계 시장은 지속적으로 성장하고 있지만 국내에서는 전무한 실정이다. 특히 공동주택의 분양단계는 고객의 의사결정을 위해 건축정보를 가장 효과적으로 전달해야 하는 필요가 있다. 본 연구는 공동주택 분양단계 프로세스별 분양마케팅 전략 및 마케팅 사례분석을 통해 공동주택 분양단계의 현황을 분석하고, 분양마케팅 시 건축정보 전달 측면에서 발생하는 문제점에 대해 AHP 기법을 활용하여 중요도 및 우선순위 분석을 진행하였다. 이를 해결하기 위해 BIM 기반의 가상현실 기술을 적용할 수 있는 방안을 제안한다.

• Journal of Radiation Protection and Research
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• 제44권1호
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• pp.32-42
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• 2019

Background: There have been much efforts to develop the proper and realistic machine Quality Assurance (QA) reflecting on real Volumetric Modulated Arc Therapy (VMAT) plan. In this work we propose and test a special VMAT plan of plan-class specific (pcsr) QA, as a machine QA so that it might be a good solution to supplement weak point of present machine QA to make it more realistic for VMAT treatment. Materials and Methods: We divided human body into 5 treatment sites: brain, head and neck, chest, abdomen, and pelvis. One plan for each treatment site was selected from real VMAT cases and contours were mapped into the computational human phantom where the same plan as real VMAT plan was created and called plan-class specific reference (pcsr) QA plan. We delivered this pcsr QA plan on a daily basis over the full research period and tracked how much MLC movement and dosimetric error occurred in regular delivery. Several real patients under treatments were also tracked to test the usefulness of pcsr QA through comparisons between them. We used dynalog file viewer (DFV) and Dynalog file to analyze position and speed of individual MLC leaf. The gamma pass rate from portal dosimetry for different gamma criteria was analyzed to evaluate analyze dosimetric accuracy. Results and Discussion: The maxRMS of MLC position error for all plans were all within the tolerance limit of < 0.35 cm and the positional variation of maxPEs for both pcsr and real plans were observed very stable over the research session. Daily variations of maxRMS of MLC speed error and gamma pass rate for real VMAT plans were observed very comparable to those in their pcsr plans in good acceptable fluctuation. Conclusion: We believe that the newly proposed pcsr QA would be useful and helpful to predict the mid-term quality of real VMAT treatment delivery.