• Journal of Internet Computing and Services
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• v.25 no.2
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• pp.79-92
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• 2024

ChatGPT, as a representative chatbot leveraging generative artificial intelligence technology, is used valuable not only in scientific and technological domains but also across diverse sectors such as society, economy, industry, and culture. This study conducts an explorative analysis of user sentiments and needs for ChatGPT by examining global social media discourse on Reddit. We collected 10,796 comments on Reddit from December 2022 to August 2023 and then employed keyword analysis, sentiment analysis, and need-mining-based topic modeling to derive insights. The analysis reveals several key findings. The most frequently mentioned term in ChatGPT-related comments is "time," indicative of users' emphasis on prompt responses, time efficiency, and enhanced productivity. Users express sentiments of trust and anticipation in ChatGPT, yet simultaneously articulate concerns and frustrations regarding its societal impact, including fears and anger. In addition, the topic modeling analysis identifies 14 topics, shedding light on potential user needs. Notably, users exhibit a keen interest in the educational applications of ChatGPT and its societal implications. Moreover, our investigation uncovers various user-driven topics related to ChatGPT, encompassing language models, jobs, information retrieval, healthcare applications, services, gaming, regulations, energy, and ethical concerns. In conclusion, this analysis provides insights into user perspectives, emphasizing the significance of understanding and addressing user needs. The identified application directions offer valuable guidance for enhancing existing products and services or planning the development of new service platforms.

• 한국HCI학회:학술대회논문집
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• 2006.02a
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• pp.807-811
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• 2006

본 논문에서는 기존의 연구에서 여러 단계를 거쳐 복잡한 연산을 한 후에 수묵화 표현이 가능했던 것과 달리 기존에 요구되었던 채색과정을 줄임으로써 렌더링의 효율을 높인 실시간 3차원 수묵화 기법을 제안한다. 본 논문에서 제안된 기법은 모델이 보여지는 방향에 따라 다른 조명 값과 법선 벡터 값을 계산한 후 연산 값에 따라서 여러장의 텍스처를 일정 비율에 맞춰서 모델에 적용함으로써 수묵화의 특징인 농담, 발묵 효과를 한 번에 적용할 수 있게 한다. 그리고 모델의 윤곽선을 표현하는데 사용자의 입력에 따라 붓의 굵기를 조절하게 하여 보다 사실적인 수묵화 느낌을 살렸다. 또한 텍스처 매핑 이후 에도 동양화적인 느낌을 살리기 위해서 두 가지의 종이질감효과를 추가하였다. 이 2 가지의 종이질감 효과는 일종의 안개 필터로서 기존의 안개 필터와 달리 모델이 그려지는 위치에 따라서 각각 가중치가 다른 필터가 적용되게 하였다. 이렇게 필터가 적용된 렌더링의 결과는 일반적으로 채색된 3차원 모델과 느낌이 다른 자연스러운 결과를 생성할 수 있다. 본 연구는 또한 간단한 구현에 장점을 두고 있기 때문에 간단한 애니메이션이나 일반 3차원 게임 등 여러 분야에서 기존에 적용하기 어려웠던 수묵화 기법을 다양하게 활용할 수 있는 가능성을 제시한다.

• 한국HCI학회:학술대회논문집
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• 2006.02a
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• pp.1319-1324
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• 2006

최근 다양한 분야(건축, 디자인, 영화관)에서 활용되는 디스플레이 기술들은 대체로 평면에 투영하는 프로젝션 기술을 사용하고 있다. 예외적으로 평면이 아닌 곡면에 투영하는 경우도 있었으나, 기술적인 제약으로 왜곡된 영상을 보정하여 사용하는 경우는 드문 상태이다. 그리고 상호작용의 경우는 기계적 장치에 의존한 초보적 형태가 주류를 이루고 있다. 본 논문에서는 프로젝션 기술 중에서 원통형 곡면상으로의 투영 기법과 모션인식을 반영한 상호작용 기법에 대해서 논하고자 한다. 3D 영상을 곡면에 왜곡 없이 투영하기 위하여, 본 논문에서는 '2-pass 렌더링' 기법을 이용하였다. 이 기법에서는 현재 렌더링 된 영상을 텍스쳐로 저장한 다음 원통형 물체에 매핑시켜 곡면에 적합한 영상으로 보정한다. 그리고 기계적 장치에 의존하지 않는 상호작용을 위해, 카메라를 통하여 실시간으로 사용자 정보(위치, 방향 값)를 입력 받아 원통형 스크린과 매칭되는 좌표 값을 계산한다. 위와 같은 기법들을 구현하기 위한 실험으로 미디어 아트 작품을 제작하였으며, 투영과 상호작용에 관한 알고리즘을 작품에 적용하였다. 이 작품은 하나의 프로젝터를 사용하여 1/4 원통형 곡면으로의 투영과 상호작용을 수행하였다. 본 연구의 결과는 미디어 아트 작품의 프로젝션 모듈로 사용 될 수 있으며, 공연장 건축, 실내디자인, 체감형 인터랙티브 게임, 가상현실 영화관 등 다양한 분야에 적용 될 수 있다.

• Journal of The Korean Association of Information Education
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• v.6 no.2
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• pp.225-233
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• 2002

Students are getting more opportunities to use the internet at school and home with the development of information & communication technology and the spread of computers. It can be used for education; otherwise, it also has some negative side effects, such as, the circulation of unsound information, game addiction, the misuse and overuse of information. Information communication ethics education is needed to protect students from those negative side effects in cyber space. This paper presents the systematic education contents and ways to teach correct information communication ethics education form the results of questionaires to students, teachers and parents, and other related study.

• Journal of the Institute of Electronics and Information Engineers
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• v.50 no.4
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• pp.246-251
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• 2013

In this paper, it is proposed a bandwidth allocation Scheme based on Bankruptcy theory in Distributed Mobile Multimedia Network. The proposed scheme is guaranteed a minimum allocation. So, the minimum quality of each service are guaranteed. Therefore efficient and fairness network can be configured. The performance evaluation results indicate that the proposed scheme has good performance than other existing schemes by the fairness index and the Erlang blocking formular calculation. The minimum bandwidth of the proposed scheme can be applied to other techniques of a priority based bandwidth allocation scheme and dynamic bandwidth allocation scheme.

• Journal of Broadcast Engineering
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• v.23 no.1
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• pp.63-73
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• 2018

These days, VR contents are created in three ways: CG based method, game engine based method, and live action shooting method. The most universal method is live action shooting. So far, most live actions are shot with action cams. Therefore, this method is different from professional image production method for movies and TV dramas. This study tries to point out the difference between professional image production method and action cam based shooting method, and proposes an alternative. The proposed method is log shooting based HDR filming and editing. As the result of test shooting and editing, the proposed method was able to obtain more color information than conventional action cam based shooting method and thereby to implement high-definition images which are hard in an action cam.

• Proceedings of the Korea Contents Association Conference
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• 2006.11a
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• pp.737-740
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• 2006

With the development of internet diffusion, digital contents industries has been growing with various forms such as game, animation, e-learning etc.. Considering that digital contents industry is the part of national growth engine, it is very important to make decision over technology development direction based on commercialization premises. This paper tries to give practical help over industries and academia through details industry analysis and assessment. The part of assessment tools which was originated from Standford Research Institute has been applied to compare and analyze the details industries.

• Proceedings of the Korea Contents Association Conference
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• 2006.11a
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• pp.528-532
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• 2006

In a cyber aquarium, the behavior of fish objects is the most important factor in respect of visual effects. In this paper, we analyze the principal habits of fish objects such as the vitality, the range of movement, the maximum depth of water they can live, and the cycle of eating. Then, we suggest a method for simulating the stable marine ecosystem with controlling the behaviors, the interaction with other species, the average span of life, and all that sort of thing based on the result of analysis. Because we can freely modify the behavior of fish object by altering the values of attributes, it can be utilized in the dynamic cyber aquarium, the 3D aquarium screen saver, and the cyber fish game, and so on.

• Archives of design research
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• v.13 no.3
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• pp.49-58
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• 2000

We commonly use the computer interface a generalized form. However, the requirement of the user various and some users cannot apply the general circumstance. For these requirements, this research suggests the non-verbal communication. The suggestion is that Mewing with the mouth in human behavior applies to the interaction of the computer This was offered in three forms. First, drawing application: second, the arcade game: third, the interactive book. in condusion, we confirmed that the suggestion of this research could be effectively used for the development of the human computer interface.

• Journal of the Korea Computer Industry Society
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• v.7 no.5
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• pp.555-562
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• 2006

Computer animation is tile most advanced composite art to apply image, sound to the theme, Domestic technique is improved but still lacks creativity and content in theinternational market. In this paper, I'll notify the importance of planning and introduce narrative animation to produce their own style of animation. A successful career in the digital animation industry requires more than just technical expertise. It also demands creative mastery, a sense of wonder and boundless imagination. This unique hands-on program combines traditional, creative and technical skills and develops digital artists, not software technicians. Especially, people involved in the industry shouldrecognize a special quality of narrative animation in today's 3D animation and game- saturated climate. Therefore, they are able to create a new form of high-quality animation. It will be expected to promote digital animation education with a new index.