• The Journal of the Korean dental association
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• v.57 no.12
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• pp.728-735
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• 2019

Objective: Previous studies suggested the potential influence of YouTube videos regarding dentistry on the mass population. However, there was not any clear investigation for Korean population. We aimed to systemically analyze the type of the dentistry-related videos uploaded on YouTube Korea and the accounts used for uploading, and to assess their effect on the view count of the content. Methods: Classification, type of the accounts, and view count of the videos listed by the keyword 'dentistry' were analyzed, which were uploaded on YouTube Korea platform from September 2017 to April 2019. Kruskal-Wallis test with post hoc analysis was used to assess the effect of the classification of the videos and the type of accounts on the view count. Results: 1.026 videos were enrolled to the analysis. Primary classification of the videos was information/education, advertisement, life, news, child contents, autonomous sensory meridian response, broadcast, cartoon/game, humor, and music. Secondary classification of the videos was dental experience, advertisement, role-playing, information/education., humor, cartoon/game, child contents, life, and broadcast. Type of the accounts was dentistry associates, general public, media company, and government office (sorted by frequency). Subject of the most videos (93.6%) was general public. There was statistically significance in the view count of the videos according to the primary and secondary classifications, the account used for uploading, and target subject of the videos. Conclusion: Dentists and their associates should recognize the importance of YouTube platform and try to monitor and intervene the dentistry-related contents, considering its huge impact on the general public.

• Journal of Digital Contents Society
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• v.11 no.4
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• pp.579-588
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• 2010

Generalization of the web, development of one-person media such as the blog and mini homepage, and integration of video digital devices have generalized multimedia video services on the web. However, flash videos, the previously used bit map-based multimedia videos, exhibit problems like the waterfall phenomenon, lag phenomenon, or non-synchronization of audios or videos. Thereupon, This study is conducted to suggest a converting technique to provide efficient web video service on the web by solving problems of bitmap-based flash video through file format-converting software and movie editing programs. And this paper also conducts experiments on five videos for 13 CODECs and analyzes converted results comparatively. The recommendable method considering the characteristics of each videos is to utilize MainConcept H.264 Video CODEC using SWF2Video pro. The result of this research can be used to produce web videos on the web more effectively.

• Asian Spine Journal
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• v.12 no.6
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• pp.987-991
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• 2018

Study Design: Cross sectional study. Purpose: To assess the quality of anterior cervical discectomy and fusion (ACDF) videos available on YouTube and identify factors associated with video quality. Overview of Literature: Patients commonly use the internet as a source of information regarding their surgeries. However, there is currently limited information regarding the quality of online videos about ACDF. Methods: A search was performed on YouTube using the phrase 'anterior cervical discectomy and fusion.' The Journal of the American Medical Association (JAMA), DISCERN, and Health on the Net (HON) systems were used to rate the first 50 videos obtained. Information about each video was collected, including number of views, duration since the video was posted, percentage positivity (defined as number of likes the video received, divided by the total number of likes or dislikes of that video), number of comments, and the author of the video. Relationships between video quality and these factors were investigated. Results: The average number of views for each video was 96,239. The most common videos were those published by surgeons and those containing patient testimonies. Overall, the video quality was poor, with mean scores of 1.78/5 using the DISCERN criteria, 1.63/4 using the JAMA criteria, and 1.96/8 using the HON criteria. Surgeon authors' videos scored higher than patient testimony videos when reviewed using the HON or JAMA systems. However, no other factors were found to be associated with video quality. Conclusions: The quality of ACDF videos on YouTube is low, with the majority of videos produced by unreliable sources. Therefore, these YouTube videos should not be recommended as patient education tools for ACDF.

• IEIE Transactions on Smart Processing and Computing
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• v.6 no.2
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• pp.102-108
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• 2017

Videos for 360-degree virtual reality (VR) systems have a large amount of data because they are made with several different videos from multiple cameras. To store the VR data in limited space or to transmit it through a channel with limited bandwidth, the data need to be compressed at a high ratio. This paper focuses on the compression efficiency of VR videos for good visual quality. Generally, 360-degree VR videos should be projected into the planer format to cope with modern video coding standards. Among various projection schemes, three typical schemes (equirectangular, line-cubic, and cross-cubic) are selected and compared in terms of compression efficiency and quality using various videos.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• fall
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• pp.91-94
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• 2021

As deep learning technologies becoming developed, realistic fake videos synthesized by deep learning models called "Deepfake" videos became even more difficult to distinguish from original videos. As fake news or Deepfake blackmailing are causing confusion and serious problems, this paper suggests a novel model detecting Deepfake videos. We chose Residual Convolutional Neural Network (Resnet50) as an extraction model and Long Short-Term Memory (LSTM) which is a form of Recurrent Neural Network (RNN) as a classification model. We adopted cosine similarity with hinge loss to train our extraction model in embedding the features of Deepfake and original video. The result in this paper demonstrates that temporal features in the videos are essential for detecting Deepfake videos.

• Journal of Korean Academy of Dental Administration
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• v.10 no.1
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• pp.66-75
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• 2022

This study aimed to compare the perception of dental role-play or dental ASMR videos between the general public and dental personnel, to determine whether they are suitable for mass media or educational media, and to identify guidelines for video production. The survey consent form was agreed on using SNS for the general public and dental personnel, 236 ordinary people and 232 dental officers who said that they watched dental ASMR videos were analyzed. The questionnaire consisted of 27 questions for the general public and 31 for dental personnel. Data were analyzed using the chi-square test and the Independent T-test using SPSS 25.0 ver. The viewing experience of 'dental ASMR videos' was significantly higher among dentists (84.7%) than among the general population (71.5%) (p<0.001). Overall, 53.8% of the general public were interested in watching dental ASMR videos, and 47.8% of dental personnel acquired clinical information from them.. Overall, 64.8% of the general public and 65.5% of the dental workforce felt that such technical videos should be produced under the guidance of experts in the field to provide accurate technical information. It is necessary to avoid indiscriminate video production with inaccurate information produced by non-experts and to continuously monitor dental ASMR videos dental institutions for better quality of the videos.

• The Journal of the Korea Contents Association
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• v.22 no.5
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• pp.327-337
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• 2022

With the fierce competition between universities and the diversification and rapid development of multimedia, university promotional videos have become one of the effective means for universities to instill a better brand image, increase their competitiveness, and attract more new students. There were not many studies on university promotional videos in the field of advertising promotion, and there were no comparative studies on university promotional videos in Korea and China. Accordingly, this study aims to analyze promotional videos of the top 30 universities in Korea and China by referring to the world university rankings released by the 2021 World University Rankings (QS) World University Evaluation Agency and explore the differences between the two countries. According to the results of the study, it was found that there were some significant differences between Korea and China's university promotional images in each analysis category. This study is meaningful in that it will serve as a reference for the production of promotional videos for schools in the future while presenting the differences between Korean and Chinese university promotional videos.

• Journal of the Korean Society of Clothing and Textiles
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• v.44 no.4
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• pp.749-763
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• 2020

This study examined how viewers perceived luxury haul videos, what factors made them experience vicarious pleasure and gain relative deprivation when watching them. This study conducted an interview with 20 viewers of luxury haul videos. The content obtained from the interview was analyzed by classifying it into academic terms. Cases of vicarious pleasure arose when viewers had sufficient empathy when watching videos, which was intensified by YouTubers' behavior and visual stimulation in videos. A person's relative deprivation due to her financial capabilities or appearance occurred when she compared herself with YouTubers. The more viewers perceived luxury haul as a source of information, the more they felt relative deprivation; in addition, the more they perceived it as entertainment, the more they felt vicarious pleasure. Viewers who had a high level of involvement in luxury goods tended to feel vicarious pleasure; however, viewers with a high level of involvement in YouTubers tended to feel relative deprivation. This study helps luxury brands and YouTubers understand viewers' perception of their products and programs as well as helps in the development of fashion haul videos that are beneficial to viewers.

• Journal of Internet Computing and Services
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• v.19 no.5
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• pp.77-87
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• 2018

Since the inception of the platform business in educational contents, the prominence of the online educational video has flipped the educational environment. Educational contents have been produced on the internet and allowed learners to access more flexible and student-centered. In fact, the number of people watching the educational content online, such as TED talks and YouTube, has increased during the past decade. The ways of delivering the lecture and the course information in online educational videos are totally different from the traditional lectures. In this paper, we aimed to examine and categorize the online educational videos based on the user's engagement and interest in the course contents. For the study, a negative binomial regression analysis was applied to estimate the effects of the attributes of the traditional lectures by comparatively analyzing the educational videos online. Several values are determined as engaging factors in the online educational videos; hybrid production of education and entertainment, shorter duration, and the number of presenters. From the study, we suggests how to produce engaging educational contents which will appeal the attentions from the users. Moreover, the result of the study may use as a guide to the providers making the productive educational videos.

• The Journal of the Korea Contents Association
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• v.20 no.4
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• pp.1-13
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• 2020

In order to understand the recommendation algorithm applied to the online video platform, this study examines the relationship between the content characteristics of K-pop music videos and related videos recommended for playback on YouTube, and analyses which videos are recommended as related videos through network analysis. As a result, the more liked videos, the higher recommendation ranking and most of the videos belonging to the same channel or produced by the same agency were recommended as related videos. As a result of the network analysis of the related video, the network of K-pop music video is strongly formed, and the BTS music video is highly centralized in the network analysis of the related video. These results suggest that the network between K-pops is strong, so when you enter K-pop as a search query and watch videos, you can enjoy K-pop continuously. But when watching other genres of video, K-pop may not be recommended as a related video.