• 대한공업교육학회지
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• 제30권2호
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• pp.104-114
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• 2005

The purposes of this study were to examin instructor and students's responses and to explore the pros and cons and the possibility of the DVC(desktop video conferencing) instruction at a C university in Daejon. 6 males and 5 females took the course. 10 lived in Daejeon and 1, who accessed from other region, lived other province, Pusan. Students were surveyed and interviewed, instructor was interviewed and the online observation of the instruction was undertaken. Students' responses showed that the DVC instruction was very effective to generate student's learning motivation and interest and to deliver the learning contents. Instructor's variety roles different from conventional one were very important and instruction must be run to activate students' interactions.

• 한국통신학회논문지
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• 제28권11C호
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• pp.1123-1129
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• 2003

본 논문에서는 H.264의 동영상 압축 성능 향상을 위하여 새로운 구문 요소를 제안한다. 기존 H.264 압축 부호화 방식에서는 RUN, MB_type이라는 독립된 구문 요소로서 매크로 블록 정보를 전송한다. 그런데 다양한 테스트 시퀀스들에 있어서 RUN, MB_type 구문 요소들을 하나로 결합할 경우 압축 성능이 보다 향상된다는 사실을 실험적으로 확인하였다. 이와 같은 사실을 바탕으로, 본 논문에서는 기존의 독립된 2가지 구문 요소를 하나로 통합한 새로운 (RUN, MB_type) 구문 요소를 제안한다. 그리고 보다 성능 개선을 위하여 제안한 구문 요소의 부호로서 화면 종료를 나타내는 EOF 부호를 새로이 추가하여 사용하였다. 모의실험 결과에서는 기존 방식에 비해 제안한 방식이 매크로 블록의 압축률에 있어 최대 15% 향상됨을 보여준다.

• 한국전문물리치료학회지
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• 제18권2호
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• pp.27-34
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• 2011

The aim of this study was to determine the effect of action-observation training on arm function in people with stroke. Fourteen chronic stroke patients participated in action-observation training. Initially, they were asked to watch video that illustrated arm actions used in daily activities; this was followed by repetitive practice of the observed actions for 3 times a week for 3 weeks. Each training session lasted 30 min. All subject participated 12 training session on 9 consecutive training days. For the evaluation of the clinical status of standard functional scales, Wolf motor function test was carried out at before and after the training and at 2 weeks after the training. Friedman test and Wilcoxon signed rank test was used to analyze the results of the clinical test. There was a significant improvement in the upper arm functions after the 3-week action-observation training, as compared to that before training. The improvement was sustained even at two weeks after the training. This result suggest that action observation training has a positive additional impact on recovery of stroke-induced motor dysfunctions through the action observation-action execution matching system, which includes in the mirror neuron system.

• 대한물리의학회지
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• 제11권1호
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• pp.133-140
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• 2016

PURPOSE: This study's aim was to investigate the effects of an action observational training in subactue stroke patients with moderate impairment. METHODS: 22 participants (men=13, women=9) with hemiparesis were randomly assigned to action observation training group or task-oriented training group. Patients in both group underwent a patient-specific multidisciplinary rehabilitation program. Participants in the action observation group (mean age, $62.78{\pm}9.85$) were asked to watch the video scene, in the knowledge that they would then attempt to perform the same movement task after watching. The control group (mean age, $61.49{\pm}8.64$) practiced the same tasks, without watching the video. To evaluate upper limb function, the upper extremity part of the Fugl-Meyer Assessment upper extremity and the Box and Block Test were used. The modified Barthel index was used to assess ADLs, and the modified Ashworth scale were used to assess spasticity in the upper extremity. RESULTS: The action observational training group exhibited greater changes in the Fugl-Meyer assessment upper extremity (P<0.05; 95% CI, 0.929 - 6.403), the Box and Block test (P<0.05; 95% CI, 0.086 - 5.913), and the modified Barthel index (P<0.01; 95% CI, 2.483 - 12.627) between groups. And the modified Ashworth scale (P>0.05; 95% CI, -0.402 to 0.624) did not show significantly different between groups. CONCLUSION: These findings suggest that action observational training may be more helpful to improve upper-extremity function than physical training only in subactue patients with moderate impairment after stroke.

• 한국정보처리학회논문지
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• 제5권4호
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• pp.1074-1082
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• 1998

현재 시판중인 비데오는 두개 또는 그 이상의 헤드가 호전하는 드럼에 장착되어 비데오 신호를 기록 또는 재생하고 있다. 대량 생산시 비데오의 일정한 품질관리를 얻기위해서는 드럼에 장착된 헤드의 기하학적 그리고 전기적 특성이 같은 것이어야 한다. 본 연구에서는 헤드의 기하학적 형상을 대별하는 네가지 검사항목 H0, H1, Tw, CW을 자동으로 측정하는 화상기법을 이용한 영상처리알고리즘에 관하여 기술하였다. 1000개의 헤드에 대하여 실험한 결과 현장에 적용할 수 있는 성능을 보였다.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2006년도 Proceedings of ISRS 2006 PORSEC Volume II
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• pp.791-793
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• 2006

In the satellite camera, the incoming light source is converted to electronic analog signals by the electronic component for example CCD (Charge Coupled Device) detectors. The analog signals are amplified, biased and converted into digital signals (pixel data stream) in the video processor (A/Ds). The outputs of the A/Ds are digitally multiplexed and driven out using differential line drivers (two pairs of wires) for cross strap requirement. The MSC (Multi-Spectral Camera) in the KOMPSAT-2 which is a LEO spacecraft will be used to generate observation imagery data in two main channels. The MSC is to obtain data for high-resolution images by converting incoming light from the earth into digital stream of pixel data. The video data outputs are then MUXd, converted to 8 bit bytes, serialized and transmitted to the NUC (Non-Uniformity Correction) module by the Hotlink data transmitter. In this paper, the video data streams, the video data format, and the image data processing routine for satellite camera are described in terms of satellite camera control hardware. The advanced satellite with very high resolution requires faster and more complex image data chain than this algorithm. So, the effective change of the used image data chain and the fast video data transmission method are discussed in this paper

• 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.

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2019년도 춘계학술발표대회
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• pp.455-457
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• 2019

In this paper we study the effect of decomposed spatiotemporal convolutions for action recognition in videos. Our motivation emerges from the empirical observation that spatial convolution applied on solo frames of the video provide good performance in action recognition. In this research we empirically show the accuracy of factorized convolution on individual frames of video for action classification. We take 3D ResNet-18 as base line model for our experiment, factorize its 3D convolution to 2D (Spatial) and 1D (Temporal) convolution. We train the model from scratch using Kinetics video dataset. We then fine-tune the model on UCF-101 dataset and evaluate the performance. Our results show good accuracy similar to that of the state of the art algorithms on Kinetics and UCF-101 datasets.

• Journal of Trauma and Injury
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• 제32권2호
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• pp.122-125
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• 2019

A 73-year-old man, who, in an inebriated state, had slipped in a flowerbed and was wounded on the left flank, was transferred to Trauma Center, Gil Medical Center, Gachon University College of Medicine. Based on the chest and abdominopelvic computed tomography, he was diagnosed with multiple rib fractures and hemopneumothorax on the left hemithorax and was found to have a bony fragment in the spleen. He had not presented peritonitis and exsanguinous symptoms during the observation period. Seven days later, computed tomography of the abdomen showed suspected diaphragmatic injury and a retained foreign body in the spleen. On exploration by video assisted thoracoc surgery (VATS), a herniated omentum through the lacerated site of the diaphragm was observed. After omentectomy using Endo Gia, the foreign body in the spleen was observed through the lacerated site of the diaphragm. Traumatic diaphragm rupture with a foreign body, in the spleen, was successfully managed by video assisted thoracic surgery via the lacerated site of the diaphragm.

• 한국디자인학회:학술대회논문집
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• 한국디자인학회 1998년도 봄 학술대회 발표논문집 디자인 학 연구
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• pp.4-5
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• 1998