• International Journal of Internet, Broadcasting and Communication
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• 제15권1호
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• pp.195-202
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• 2023

This study is a comparative survey study conducted to explore the differences in learners' learning flow and learning satisfaction according to the non-face-to-face class operation methods implemented at universities. After implementing different class management methods for the same subject taught by the same instructor non-face-to-face for 15 weeks, each learning flow and learning satisfaction were compared and analyzed, and the collected data were analyzed with IBM SPSS 21.0. As a result of the study, learning flow was high in the order of lectures using real-time ZOOM and recorded lectures using self-studio(3.41±0.91, 3.28±1.01), and learning satisfaction was high in the order of lectures using real-time ZOOM and lectures using the automatic recording system of classes(3.40±0.80, 3.30±0.74). The item with the lowest score was the PPT audio recording lecture in both areas of learning flow and learning satisfaction(2.72±1.04, 1.73±1.04). Considering that system errors such as sound in the smart lecture environment operated for the first time in this study affected the research results, it is suggested that future research should be conducted by supplementing the corresponding part.

• 한국인터넷방송통신학회논문지
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• 제19권4호
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• pp.1-6
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• 2019

CCTV 영상 녹화 시스템은 영상 데이터의 증거가치로 인정받음으로 인해, 시설물의 경비 혹은 보안 관제의 목적으로 실생활에 널리 사용되고 있다. 최근 인터넷의 기술의 혁신으로 유/무선 네트워크를 통해 고화질 고용량의 데이터를 실시간 처리할 수 있도록 발전하고 있다. 영상 녹화 장치에서의 녹화 데이터는 중요하지만, 이를 유지하기 위한 방법, 특히 예기지 않은 장비의 결함이나 외부 공격에 의한 영상 데이터 손실을 막기 위한 이중화 방안은 드물다. 어렵게 이중화를 구현한다고 하더라도 고용량의 영상 데이터가 네트워크를 통해 전달되면서 발생하는 네트워크 과부하를 피할 수 없다. 본 논문에서는 CCTV 네트워크 영상 녹화 환경에서 네트워크 과부하를 유발하지 않고 이중화를 운영할 수 있는 장애 조치 기법을 제시하고 검증한다.

• 융합신호처리학회논문지
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• 제10권4호
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• pp.280-288
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• 2009

본 논문에서는 한국우주전파관측망(Korean VLBI Network; KVN)을 통하여 천체의 미약한 우주전파를 고속으로 기록하는 Mark5B 고속기록기 시스템의 제어운용 소프트웨어를 분석하고 VSI(VLBI Standard Interface) 형식의 시각정보를 기록할 수 있는 소프트웨어를 개발하였다. 고속기록기 시스템의 제어운용 소프트웨어는 대용량 하드디스크를 제어할 수 있는 RAID 보드를 구동하는 소프트웨어와 네트워크를 통한 제어운용을 할 수 있다. 핵심 제어 소프트웨어가 시스템에서 구동하고 있으면 네트워크로 입력된 명령을 해석하고 실행 후 결과를 다시 네트워크를 통해 출력하도록 구성되어 있다. 이러한 소프트웨어 분석을 통하여 기록된 관측데이터를 상관처리하기 위해 필요한 시각정보를 함께 기록할 수 있는 소프트웨어를 본 논문에서 개발하였다. 개발된 소프트웨어는 데이터를 기록할 때 입력되는 1PPS 신호의 인터럽트를 확인한 후 데이터 기록과 함께 기록시각정보도 함께 데이터 기록시간동안 기록한다. 개발한 소프트웨어의 정상동작을 확인하기 위해 실제 관측을 수행하였으며, 기록한 데이터의 분석을 통하여 그 유효성을 확인하였다.

• 대한안전경영과학회지
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• 제6권3호
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• pp.303-309
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• 2004

Many system devices for fluoroscopic and general X-ray studies in diagnostic radiographic system have been being changed from analog mode to digital mode. In addition, among diagnostic imaging and radiologic examinations, fluoroscopic studies that requires functional diagnosis is being widely used. The video recording method of fluoroscopic studies has been useful in functional image diagnosis and dynamic image observation, but the utility of its image quality is being reduced because of limitation in setting play segments of the video player, inconvenience of play, difficulties in preserving reproduced images, the change of image quality, etc. In order to complement these shortages, it is necessary to facilitate access to patient diagnosis information such as storing, editing and sharing functional diagnosis images in response to the trend of the digitalization of digital radiographic & fluoroscopic system(DRF). Thus this study designed and implemented a device of storing functional dynamic images real time using a computer rather than existing video recording, aiming at contribution to functional image diagnosis.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2008년도 춘계학술대회 논문집
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• pp.1962-1967
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• 2008

A event recorder system stores a train speed and the related information for train operation in real time. Using those information, we can analysis the train operation and the reason of train accident. Currently the event recorder only manipulate the data related the train operation mechanically and electrically. In this paper we propose the event recorder to record the voice communication between the manager in the control center and train operator. By recording the voice communication in the high speed train, the correctness of analysis of train accident can be increased. The system architecture of the event recorder with voice recording is studied and interface between other equipment is proposed. And the software architecture of new event recorder is developed. We study the method of converting analog voice signal into digital data and compressing method. Also the architecture of memory to store the compressed voice data and regeneration of original analog voice are studied.

• 디지털산업정보학회논문지
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• 제13권2호
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• pp.13-25
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• 2017

Recently, the high performance of tactical situation display console and tactical data links are used to integrate the operational situations in accordance with information age and NCW (Network Centric Warfare). The tendency to maximize the efficiency of task execution has been developed by sharing information and the state of the battle quickly through complex and diverse information exchange. Tactical data link is a communication system that shares the platform with core components of weapons systems and battlefield situation between the command and control systems to perform a Network Centric Warfare and provides a wide range of tactical data required for decision-making and implementation.It provides the tactical information such as tactical information such as operational information, the identification of the peer, and the target location in real time or near real time in the battlefield situation, and it is operated for the exchange of mass tactical information between the intellectuals by providing common situation recognition and cooperation with joint operations. In this study, still image management, audio file management, tactical screen recording and playback using the storage and playback, NITF (National Imagery Transmission Format) message received from the displayer integrates the tactical situation in three dimensions according to multiple data link operation to suggest ways to ensure data integrity between the data link processor during the entire operation time.

• 방송과미디어
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• 제17권4호
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• pp.69-80
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• 2012

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 1998년도 추계종합학술대회 논문집
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• pp.977-980
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• 1998

A real-time holography system using LCD with CCD camera is proposed. In this system, the rainbow hologram is used since it can be reconstructed by white light source. And to record on CCD camera, a kind of in-line holography method is used to widen the width of the fringe pattern. The interference fringe pattern by proposed system is detected with CCD camera and transferred to the LCD A 3-dimensional image is reconstructed when a white light source illuminates the LCD. So it can represent 3 dimensional moving images at real-time. In this paper, to confirm the usefulness of the proposed method, the reconstructed image by holographic film is compared to the same reconstruct image by LCD. In the recording of the interferenced processing, the optimal ratio of the reference and object beam intenstiy is also investigated.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2001년도 추계학술대회논문집B
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• pp.539-544
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• 2001

The holographic measurement techniques can be applied to various industrial fields such as automobile, airplane, construction, electronics, medical, mechanics and physics. The visualization of fluids is very important in aerodynamics, heat transfer and stress analysis. There are classically optical methods such as shadowgraph, schlieren method, and Mach-Zehnder interferometry for visualizing the fluid flow phenomena. But, it is difficult to understand the continuous state of fluids well in those methods. In this study, the real-time holographic interferometer with high-speed camera is applied to the flow visualization. In addition, collimated laser beam and rotating wedge are used for recording and formation of carrier fringes, respectively.

• 한국통신학회논문지
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• 제27권3B호
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• pp.267-274
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• 2002

본 논문에서는 SLM(TFT LCD)과 광굴절 결정을 이용하며 실시간으로 처리할 수 있는 칼라 패턴인식 시스템을 구현하였다. 이 시스템은 인식하고자 하는 문자패턴을 SLM을 이용하여 제어하고, 우수한 각도 선택성과 광굴절 특성을 갖는 LiNbO$_3$(두께 10mm) 결정을 기록 매질로 사용하였다. 제안된 광학 시스템에 의해 빨간색과 녹색 칼라 패턴의 모양 정보와 칼라 정보를 각각 다른 위치에서 실시간 처리로 확연히 판별해서 인식할 수 있었다.