• KSII Transactions on Internet and Information Systems (TIIS)
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• 제9권5호
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• pp.1856-1869
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• 2015

This paper addresses the issues of 3D human activity detection, tracking and recognition from RGB-D video sequences using a feature structured framework. During human tracking and activity recognition, initially, dense depth images are captured using depth camera. In order to track human silhouettes, we considered spatial/temporal continuity, constraints of human motion information and compute centroids of each activity based on chain coding mechanism and centroids point extraction. In body skin joints features, we estimate human body skin color to identify human body parts (i.e., head, hands, and feet) likely to extract joint points information. These joints points are further processed as feature extraction process including distance position features and centroid distance features. Lastly, self-organized maps are used to recognize different activities. Experimental results demonstrate that the proposed method is reliable and efficient in recognizing human poses at different realistic scenes. The proposed system should be applicable to different consumer application systems such as healthcare system, video surveillance system and indoor monitoring systems which track and recognize different activities of multiple users.

• 한국콘텐츠학회논문지
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• 제16권2호
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• pp.480-493
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• 2016

최근 들어 사회적인 상호작용 방식이 동영상을 통해 정보를 주고받는 방식으로 변하고 있다. 그래서 본 연구에서는 '나'와 '다른 사람'의 영상을 구성요소로 하는 새로운 소셜 비디오 플랫폼을 제안하고자 한다. '다른 사람'의 개성(Personality)과 '나'의 개성이 '나'에게 어떤 영향을 주는지 알아보고, 2가지 요소를 어떻게 나타내주어야 하는지 알아보기 위해 사회적 영향 이론(Social Impact Theory)과 자기 점검 이론(Self-Monitoring Theory)을 적용하여 영상을 시청하는 '나'의 개성과 '다른 사람'의 개성이 사용자의 긍정성과 소속감에 어떤 영향을 미치는지 알아보았다. 그리고 이를 실증적으로 검증하기 위해 실제 소셜 비디오 플랫폼을 구축하여 실험을 진행하였다. 그 결과, 사용자들은 자신의 영상이 화면에 제시되었을 때, 긍정성을 더 많이 느끼는 것을 확인하였다. 하지만 자신의 영상이 함께 제시되면서, 주변영상에 나타난 다른 사람들의 모습이 여성성이 높아질수록 오히려 느끼는 긍정성은 줄어드는 것으로 확인되었다. 또한 다른 사람들의 모습이 남성성이 높을 때, 사용자는 소속감을 더 크게 느끼는 것을 확인하였다. 본 연구 결과를 통해 새로운 소셜 비디오 플랫폼의 구성과 형태에 대한 시사점을 제공할 수 있을 것으로 보인다.

• 한국컴퓨터정보학회논문지
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• 제23권2호
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• pp.117-123
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• 2018

This article is to investigate the possibility that project-based classes introducing mobile phones can replace the monotony of traditional classes led by teachers as well as they can encourage students to take active part in the classes to some extent. The students in groups choose a genre for their own video projects (e.g., movie, drama, news, documentary, and commercial) and produce the video contents using a mobile phone for presentation made at the end of a semester. In the sense that the students are allowed to do video-based mobile phone projects, they can work independently outside of class, where time and space are more flexible and students are free from the anxiety of speaking or acting in front of an audience. A mobile phone project consists of around five stages done both in and outside of the classroom. All of these stages can be graded independently, including genre selection, drafting of scripts, peer review and revision, rehearsals, and presentation of the video. Feedback is given to students. After the presentation, students filled out a survey questionnaire sheet devised to analyze students' responses toward preferences and level of difficulty of the project activity. Finally, proposals are made for introduction of a better mobile phone-based project classes.

• 한국컴퓨터정보학회논문지
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• 제23권2호
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• pp.77-82
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• 2018

In this paper, we propose an improvement plan to increase the learning effect and satisfaction through the PBL - related video design class. PBL To prepare for the Fourth Industrial Revolution era, we must acquire diverse knowledge and skills to discover problems and solve them creatively. Therefore, various learning methods are being studied, and one of them is PBL learning. PBL is a learner-centered education that explores problems that may arise from specific topics other than existing curriculum-based education methods and finds solutions to problems. In this study, two lectures on video design related to video contents and image contents were taught in PBL class, and PBL class problem was analyzed and the improvement plan was studied.

• Journal of Information Technology Applications and Management
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• 제17권2호
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• pp.71-90
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• 2010

Electronic learning(or e-learning) has created hype for companies, universities, and other educational institutions. It has led to the phenomenal growth in the use of web-based learning and experimentation with multimedia, video conferencing, and internet-based technologies. Many researchers are interested in the factors that affect to the performance of e-learning or e-learning services. In this sense, this study is aimed at proposing e-learning system reuse prediction models in which e-learner intention to reuse influence factors(i.e., system accessibility, system stability, information clarity, information validity, self-regulated efficacy, computer self-efficacy, perceived usefulness, perceived ease of use, flow, and parental expectation) affect e-learner intention to reuse positively. A web survey was conducted for the full members of the e-learning education institute A in Seoul, Republic of Korea, an exclusive e-learning company that provides real time video lectures via the desktop conferencing system. The web survey was conducted for 20 days from November 5, 2009, through the e-learning web site of the company A. In this study, three data mining techniques were used : the multivariate discriminant analysis, CART, and C5.0 algorithm. This study was conducted to provide the e-learning service providers, e-learning operators, and contents developers with marketing and management strategies for improving the e-learning service companies, based on the data mining analysis results.

• Journal of Electrical Engineering and Technology
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• 제11권2호
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• pp.519-528
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• 2016

In order to achieve fast computational speed with good visual quality of output video, we propose a frequency domain based new fractal video compression scheme. Normalized cross correlation is used to find the structural self similar domain block for the input range block. To increase the searching speed, cross correlation is implemented in the frequency domain using FFT with one computational operation for all the domain blocks instead of individual block wise calculations. The encoding time is further minimized by applying rotation and reflection DFT properties to the IFFT of zero padded range blocks. The energy of overlap small size domain blocks is pre-computed for the entire reference frame and retaining the energies of the overlapped search window portion of previous adjacent block. Quadtree decompositions are obtained by using domain block motion compensated prediction error as a threshold to control the further partitions of the block. It provides a better level of adaption to the scene contents than fixed block size approach. The result shows that, on average, the proposed method can raise the encoding speed by 48.8 % and 90 % higher than NHEXS and CPM/NCIM algorithms respectively. The compression ratio and PSNR of the proposed method is increased by 15.41 and 0.89 dB higher than that of NHEXS on average. For low bit rate videos, the proposed algorithm achieve the high compression ratio above 120 with more than 31 dB PSNR.

• International Journal of Contents
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• 제17권4호
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• pp.101-118
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• 2021

The prevalence of We-Media short videos has attracted emerging independent fashion designers (EIFD), a new force in the fashion industry directing their brand promotion to We-Media for amassing online followers. However, compared to famous content generators, EIFDs' creative, design-based visual appeal has not provided them with the significant edge. The former's success is admittedly supported by the platform backstage algorithm. Yet, the content is the cornerstone for building relationship between the sender and the reception. The authentic perception of the content is one of the basic appeals for which the audience chooses to follow the source. Therefore, with the EIFD short video as the research content, this study is established from the audience's perspective to understand the different dimensions of their authentic perceptions of EIFDs short video. The study was conducted mainly in the form of the Q method. The collection of 52 Q samples were realized through the Focus Group Interview and literature review on multidimensional authenticity. Thirty-six subjects participated in the sorting of the Q-sets. Finally, four dimensions of audience authenticity perceptions of EIFDs were derived: 'ingenuity', 'relevant', 'transparent', and 'experiential'. The corresponding short video content design strategies are suggested for effective communication of EIFDs and their personal brands.

• 대한안전경영과학회지
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• 제3권3호
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• pp.143-149
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• 2001

With the development of computer technologies and the increase of internet users, Internet plays an important role in job-recruitment business. However, almost of the sites which provide job offering and job hunting service, merely have the function such as simple inquiry for information corresponding to job offering and job hunting. In this research, the online website whose task is supporting whole procedure of recruitment for real enterprises is constructed to apply the interview procedures of the real enterprises through internet. We utilize the video conference to increase the reality for interview. Also it has functions such as presentation of application form and resume and self introduction using the video conference. Through the online recruitment website we can expect time and cost saving for recruitment for both sides of enterprise to hunt the person and people to seek the job.

• 성인간호학회지
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• 제14권1호
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• pp.114-124
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• 2002

Purpose: This study was conducted to investigate whether a self-efficacy information resources program based on the self-efficacy theory of Bandura (1986) would increase self-efficacy and self-care in patients with CAD. Method: The study was a one group, pretest-posttest pre-experimental design research. The Self-Efficacy Information Resources Program was composed of a video tape program and a telephone coaching program and based on vicarious experiences and verbal persuation. The Program was used as an experimental treatment from February 27. to May 27, 1999. Twenty patients participated from a university hospital located in Seoul. Three days later after a pretest the telephone coaching program was given. It was repeated weekly during a 3 week period. At the end of this period post-test data were collected by mail. Data were analyzed with a random permutation test using SAS program. Result: 1) Scores on self-efficacy after the Self-Efficacy Information Resources Program were significantly higher than before the program (p=0.06). 2) Scores on self-care after the Program were significantly higher (subjective self-care, p=0.0005; objective self-care, p= 0.0002) than before the program. Conclusion: The Program was found to be an effective nursing intervention for increasing self-efficacy and self-care. When nurses who care for CAD patients plan to increase their patients' self care ability, they should always consider the concept of self-efficacy.

• 감성과학
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• 제22권2호
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• pp.29-36
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• 2019

기존 연구들은 도덕적 판단이 다양한 요인에 의해 영향받는다는 것을 보여주었다. 혐오감이 도덕적 엄격함을 유도하며, 도덕적 처벌에 대한 청중효과는 이를 보여주는 예들이다. 도덕적 판단이 유동적이라는 것은 강한 정서적, 인지적 효과를 가진 영상자극이 도덕적 판단에 어떤 영향을 미치는지에 대한 질문을 던지게 한다. 긍정영상이 도덕적 행동을 촉진한다는 것을 보여준 연구들은 일부 존재하지만(Schnall, Roper, & Fessler, 2010), 부정영상이 도덕적 판단에 미치는 영향을 확인한 연구는 존재하지 않는다. 본 연구는 인간의 선함과 악함을 보여주는 영상이 자신과 타인에 대한 도덕적 판단에 미치는 영향을 검증하였다. 이를 위해 참가자들에게 인간의 긍정 혹은 부정적인 면을 보여주는 영상을 시청하게 한 다음, 자신 혹은 타인의 도덕적 위반행위의 옳고 그름에 대해 판단하게 하였다. 그 결과 영상의 내용(긍정, 부정)과 행위주체(자신, 타인) 모두 도덕적 판단에 유의미한 영향을 미쳤으나, 두 요인간의 상호작용이 발견되었다. 특히 인간의 악함을 보여주는 영상을 시청한 경우 참가자들은 타인의 도덕적 위반행위를 더욱 가혹하게 판단하였다. 이 결과는 영상의 내용이 도덕적 판단에 영향을 미치며, 그 영향이 행위주체에 따라 달라진다는 것을 보여준다. 도덕적 혐오, 프레이밍 효과, 기본적 귀인오류에 근거하여 이 결과를 해석하였다.