• 한국간호교육학회지
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• 제22권4호
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• pp.485-494
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• 2016

Purpose: The present research is a descriptive study aimed at understanding clinical nurses' Video display terminal (VDT) syndrome and identifying the factors that affect their VDT syndrome. Methods: Data were collected from 239 clinical nurses working in two metropolitan cities. Research tools included subject's VDT syndrome assessing musculoskeletal, ophthalmic, dermal, psychiatric, and whole body syndromes. The data were analyzed using frequency analysis, average and standard deviation, t-test, One-way ANOVA, and multiple regression analysis with the SPSS/WIN 20.0 program. Results: The subjects' VDT syndrome score was 1.34 out of 5. There were significant differences in participating subjects' VDT syndrome, hospital's size, working unit, health status, diagnosis of illness, having an Order Communication System (OCS), having an Electronic Medical Record (EMR) System, continuous VDT working for more than one hour, break time during VDT use, VDT use time, comfort of the chair, adjustability of the height of the chair, size of the VDT's desk, distance between the monitor and the user's eyes, resolution of the monitor, and frequency of eye exercise during VDT use. According to the research, influencing factors on VDT syndrome in clinical nurses included size of the VDT's desk, frequency of eye exercise during VDT use, having an EMR system, break time during VDT use, diagnosis illness, and having an OCS' system. Conclusion: The findings from this study can be used as a basis for future VDT syndrome prevention education and programs for clinical nurses.

• 방송공학회논문지
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• 제21권5호
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• pp.651-661
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• 2016

Digital signage has recently developed as a variety of forms of a large, high-resolution display provides ultra-high resolution panoramic sights to the user or provide personalized advertising through user interaction. It is also expected research and development of the open digital signage and to be equipped web-based interoperability content management system for ultra high-definition video content services with terminal equipment of a large multi display signage. In this paper, we study the implementation displayed in conjunction with more than a dozen high-resolution display in the ultra-high-resolution video and the technology of a multi-play sync video terminal using the synchronization technique for the several individual content of atypical picture resolution high definition video.

• 한국간호교육학회지
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• 제18권1호
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• pp.141-148
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• 2012

Purpose: The purpose of this study was to determine the factors associated with video display terminal (VDT) syndrome in students who use digital textbooks. Methods: A descriptive survey design was used, and 515 students were selected in 6 out of 20 designated as digital textbook research schools by the Ministry of Education, Science and Technology (MEST). Results: The subjective symptoms of VDT and their degree of severity in participants were similar to those in general students. Approximately 12.5% of the participants were classified as a potential risk group for VDT syndrome. In the potential risk group, the mean of the subjective symptoms of VDT was above normal ($2.53{\pm}0.52$). Related factors were identified using logistic regression analysis and included being female (odds ratio [OR]= 2.57, p=.002), communication time with family (<30 min) (OR=2.70, p=.006),moderate satisfaction with school life (OR=2.57, p=.003),and dissatisfaction with school life (OR=14.92, p<.001). Conclusion: In order to prevent the occurrence of VDT syndrome in students, it is necessary to urgently establish a preventative program and monitor the use of digital textbooks.

• 대한물리치료과학회지
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• 제11권4호
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• pp.20-28
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• 2004

The studys purpose were the effects of work posture, treatment method and prevention for Video Display Terminal(VDT) workers in Work-Related Musculoskeletal Disorders(WMSD) The results were as follows: 1. The prevalence rate of VDT workers in WMSD was $20{\sim}40%$. The complaint was mostly shoulder, neck, and hack area pain 2. VDT worker used to forward flexed posture and then affect of increase of muscle fatigue and pain 3. When exercise therapy PT and ADL training, were used workers decrease in pain, muscle strength, balance training, endurance strength and relief of psychiatricIn conclusion, VDT worker need good health and posture to rest and exercise with time space and treatment. It is best to prevent WMSD. VDT workers need health management by itself and systemic rehabilitation program by speciality therapist.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1999년도 제14차 학술회의논문집
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• pp.189-193
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• 1999

For a video data terminal (VDT) operator, visual strain was caused by continuous VDT operations was found id be recovered by watching the picture of virtual far point with the background of the complementary color when the treatment to recover from visual strain was carried out. When the VDT operator watches the picture of virtual far point with the condition of the complementary color stimuli on the CRT display in 60 or 120 minutes after the start of the VDT operation, the visual strain is recovered and the VDT operator is kept healthy.

• 대한전자공학회논문지SP
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• 제46권1호
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• pp.32-40
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• 2009

본 논문에서는 단말기상의 출력영상을 기반으로 한 수신영상 복원 방법을 제안한다. 무선 네트워크를 통해 전송되는 비디오 스트리밍의 화질을 평가하기 위해서는 단말기로 전송된 수신 영상에 대한 정보가 필요하다. 그러나 실제 전송된 스트리밍 데이터를 단말기로부터 얻기가 용이하지 않기 때문에 일반적으로 다수의 사람이 직접 화질을 평가하는 방법이 많이 사용된다. 본 논문에서는 단말기로 수신된 스트리밍 영상을 획득하기 위하여 단말기 상에서 출력되는 영상을 기반으로 전송영상을 재구성한다. 이를 위하여 제안한 방법에서는 단말기를 통해 출력되는 영상을 카메라를 이용하여 획득하고, 획득된 영상에서 나타나는 카메라와 단말기 사이의 기하학적 왜곡과 컬러 왜곡을 모델링하여 제거함으로써 전송받은 영상을 재구성하였다. 실험 결과에서는 원영상과 재구성한 영상사이의 PSNR을 측정하여 알고리즘의 성능을 평가하였다. 그 결과 제안한 알고리즘을 통해 $27{sim}28dB$의 PSNR을 얻을 수 있었다. 또한 EPSNR을 이용하여 제안한 알고리즘의 성능을 분석한 결과, 제안한 알고리즘을 통하여 예측된 영상이 MOS 테스트 스케일에서 비교적 좋은 범위에 속하는 것을 확인하였다.

• 대한전자공학회논문지SP
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• 제49권1호
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• pp.49-57
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• 2012

본 논문에서는 영상 단말에 디스플레이되는 영상들을 이용하여 전송된 영상의 원본 상태를 예측하는 복원 알고리듬을 제안한다. 제안한 알고리듬은 카메라를 이용하여 비디오 단말 스크린에 나타나는 영상들을 취득한다. 전송된 영상들은 카메라를 통해 획득된 영상들을 이용하여 예측해야 하지만, 일반적으로 카메라를 통해 획득된 영상들은 영상 출력 장치와 카메라의 특성에 의해 기하학적 왜곡과 컬러 왜곡을 포함하게 된다. 우리는 가중치 선형 모델을 이용하는 컬러 왜곡과 호모그라피를 이용하는 기하 왜곡 보정 알고리듬을 이용하여 이러한 왜곡들을 보정하는 알고리듬을 제안한다. 실험결과, 제안한 알고리듬이 예측한 영상과 원본 영상과의 PSNR이 28 ~ 29 정도로 나타났다.

• 한국방송∙미디어공학회:학술대회논문집
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• 한국방송공학회 2006년도 학술대회
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• pp.257-260
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• 2006

In Video streaming environment, we must consider terminal and network characteristics, such as display resolution, frame rate, computational resource, network bandwidth, etc. The JVT (Joint Video Team) by ISO/IEC MPEG and ITU-TVCEG is currently standardizing Scalable Video Coding (SVC). This can represent video bitstreams in different sealable layers for flexible adaptation to terminal and network characteristics. This characteristic is very useful in video streaming applications. One fully scalable video can be extracted with specific target spatial resolution, temporal frame rate and quality level to match the requirements of terminals and networks. Besides, the extraction process is fast and consumes little computational resource, so it is possible to extract the partial video bitstream online to accommodate with changing network conditions etc. With all the advantages of SVC, we design and implement a network-adaptive SVC streaming system with an SVC extractor and a streamer to extract appropriate amounts of bitstreams to meet the required target bitrates and spatial resolutions. The proposed SVC extraction is designed to allow for flexible switching from layer to layer in SVC bitstreams online to cope with the change in network bandwidth. The extraction is made in every GOP unit. We present the implementation of our SVC streaming system with experimental results.

• 대한방사선협회지
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• 제29권1호
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• pp.12-24
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• 2003

Purpose : The aim of this study was to investigate the variables affecting video display terminal (VDT) syndrom and prevent the harm of VDT syndrom Materials and Methods : A questionnarie study was performed with 170 radiotechnologists working at CT room

• PNF and Movement
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• 제15권2호
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• pp.149-157
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• 2017

Purpose: The purpose of this study was to assess the effect of using smartphones for tele-rehabilitation on head position and neck dysfunction in workers with visual display terminal (VDT) syndromes over a four-week period. Methods: Sixteen VDT workers volunteered to participate in stretch exercise and posture education sessions. The subjects were divided into three groups as follows: five subjects in the visit group (VSG), six subjects in the video group (VEG), and five subjects in tele-rehabilitation group (TG). The subjects in all the groups performed the exercises three days per week for four weeks. Cranial rotation angle (CRA), craniovertebral angle (CVA) measurement, and neck disability index (NDI) tests were performed before and four weeks after the intervention. Results: No significant difference in the CRA and CVA variables was found among groups. No significant difference in the CRA variable was found within each group. A significant difference in the CRA variable was found in the VSG after the four-week intervention. No significant difference in NDI was found among the groups. The NDIs among all the groups were significantly decreased after the intervention when compared with the NDIs measured before the intervention. Conclusion: The use of smartphones in the tele-rehabilitation of VDT workers with neck pain was found to be as effective on neck function as the conventional intervention method. The tele-rehabilitation of VDT workers with neck dysfunctions may be presented as an alternative way.