• International Journal of Internet, Broadcasting and Communication
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• v.13 no.4
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• pp.129-134
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• 2021

Since the first semester of 2020, domestic and overseas universities mostly provided untact online classes and limitedly provided face-to-face classes due to COVID-19 in operating courses. The convergence subjects provided in undergraduate courses attach importance to contents-centered, design-based, hands-on education, and field experience. In the situation where online education was not revitalized, instructors in charge of convergence subjects had difficulty in developing online class materials, and students' satisfaction with the classes was not high. Especially, a problem was raised that students taking the convergence subjects that included practice had difficulty in communicating with the instructors. We would investigate the present condition of distance learning in domestic universities, which came suddenly due to the global pandemic of infectious disease and make suggestions for effective distance learning in the coming era of Metaverse by emphasizing the interaction and communication between instructors and learners through an analysis of distance learning of a convergence subject.

• Journal of Korea Society of Digital Industry and Information Management
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• v.16 no.4
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• pp.55-65
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• 2020

As corona began to spread around the world, it had such a big impact on many people's lives that the word "Untact Culture" was born. Among them, non-face-to-face meetings naturally became a daily routine as educational institutions and many domestic and foreign companies used video conferencing service platforms. Among many video conferencing service platforms, Zoom, the company with the largest number of downloads, caused many security issues and caused many concerns about Zoom's security. In this paper, Zoom's security problems and vulnerabilities were classified into five categories, and Zoom's latest update to solve those problems and the 90-day security planning project were compared and analyzed. And the problem was solved and classified as unresolved. Three of the five parts have been resolved but are still described as how they should be resolved and improved in the future for the two remaining parts.

• Soft Computing and Machine Intelligence
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• v.1 no.1
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• pp.31-35
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• 2021

In recent years, due to COVID-19, the process of shopping has become more restricted and difficult for customers. Based on this aspect, customers are more interested in online shopping to keep the Untact rules and stay safe, similarly ordering their product based on their need and interest with most straightforward and fastest ways. In this paper, the reinforcement learning technique is applied in the product recommendation system to improve the recommendation system quality for better and more related suggestions based on click patterns and users' profile information. The dataset used in this system was taken from an online shopping mall in Jeju island, South Korea. We have compared the proposed method with the recent state-of-the-art and research results, which show that reinforcement learning effectiveness is higher than other approaches.

• International Journal of Internet, Broadcasting and Communication
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• v.14 no.3
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• pp.258-269
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• 2022

In these days, innovative functions are required to unmanned parcel delivery lockers. As non-face-to-face transactions become the center due to the recent COVID-19 pandemic, many problem occurs in society such as theft crimes and lack of loading space. Therefore, New concept storage device is developed in korea. It has the functions that minimizes empty spaces by using the internal transport device to enable efficient space loading and refrigerate goods such as foods. In order to systematically approach the system design of the unmanned parcel delivery lockers which is the new function is applied, We applied model-based system engineering to improve the development efficiency and use a system modeling language to express the system. We conducted interworking research of CAD data including system modeling and design data. it is expected that this method will increase the effective development efficiency such as maintenance traceability and reduction of development period and cost.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2022.10a
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• pp.90-92
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• 2022

This paper proposes an interface improvement design to improve accessibility of kiosks introduced in various fields in Korea. Kiosks are unmanned systems using touch-type screens and are particularly specialized in the field of dining out. However, due to the lack of intuition of kiosks, more and more people are giving up using kiosks. To solve this problem, the purpose of this is to increase the convenience of those who avoid using existing kiosks by increasing intuition and learning of use at the interface stage, and to increase the accessibility of kiosks through this.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• fall
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• pp.252-255
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• 2021

코로나19 바이러스로 인해 이전에는 부가적으로 이루어졌던 온라인 공연이 오프라인 공연의 대안으로 떠오르며 비대면을 일컫는 '언택트(Untact)'에 온라인을 통한 외부와의 '연결(On)'을 더한 개념인 온택트 공연의 사례가 늘어나고 있다. 그러나 오프라인 콘서트에 직접 참여하여 느낄 수 있는 공연자와 관객 간의 상호작용을 전달하기는 어렵다. 이에 본 논문에서는 'ZOOM'이라는 화상회의 플랫폼을 활용하여 현장감을 더하고, 기존의 중계시스템에서 사용하던 SDI 방식보다 더 간단하고 효율적인 NDI(Network Device Interface) 기술을 적용한 온택트 중계시스템을 제안한다.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2020.11a
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• pp.294-296
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• 2020

코로나(COVID-19)로 인해 언택트(Untact) 방송이 활성화된 현 시점에서 기존 방송의 형태는 나날이 변화하고 있다. 특히 1인 미디어 대한 관심이 급증하게 되면서 1인 방송 체제가 전통적 미디어뿐만 아니라 대중에게까지 많은 영향을 미치며 하나의 트렌드로 자리 매김하게 되었다. 따라서 본 연구는 1인 방송의 특성과 시스템 설계를 바탕으로 최소한의 장비를 사용하여 양질의 스트리밍 서비스를 제공하기 위한 1인 방송 시스템을 구축하고자 한다.

• Proceedings of the Korea Information Processing Society Conference
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• 2021.05a
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• pp.33-36
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• 2021

Corona 19 minimizes face-to-face contact, and online untact platforms are emerging in the medical sector. However, there are potential risks of medicine expiration, medicine misuse, and responsible materials management for secure delivery. In this paper, we investigate three key functional requirements for online pharmacy, and design the blockchain based online pharmacy to meet the requirements. To protect the patient's privacy and to ensure tamper-free traceability, we incorporate the multi-level access authentication scheme for each participant (governments, medical circles, and patients). We show that our system guarantees patient's privacy without further system modification.

• Proceedings of the Korean Society of Computer Information Conference
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• 2021.07a
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• pp.565-566
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• 2021

최근 펜데믹으로 인하여 대부분의 교육 시스템은 비대면 수업을 통해 수업이 이루어지고 있다. 하지만 비대면 강좌는 대면 강좌와는 다르게 강의자가 수강자의 수업 상태를 파악하는데 제한이 있으며 강좌 수강 태도에 대하여 수강자를 평가하기가 어렵다. 본 논문에서는 비대면 강좌에서 사용할 수 있는 방법 중에서 실시간 화상 강의 수강자의 참여도 추정 시스템을 제안한다. 이 시스템은 기존의 화상 시스템에서 사용하는 장비를 이용하여 수강자의 얼굴, 동공 및 사용자 활동을 실시간으로 측정하여 이를 강의자에게 여러 카테고리 형태로 수업 참여도 측정값을 제공한다. 이를 통해 강의자가 수업 시 수강자들의 수업 참여 여부와 수업 평가 및 향후 수업 개선점을 확인할 수 있도록 한다.

• Proceedings of the Korea Information Processing Society Conference
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• 2020.11a
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• pp.945-948
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• 2020

최근 코로나 사태로 인하여 한국에서는 사람 간에 거리를 두는 사회적 거리 두기와 생활 속 거리두기를 시행하고 있다. 또 식당에서의 지출 중 가장 큰 비율을 차지하고 있다. 인건비를 절감하기 위해 본 연구는 2D Lidar 센서를 사용하여 식당에서의 사람과의 접촉이 가장 큰 서빙의 역할을 로봇이 직접 하는 것을 목표로 하였다. Lidar 센서를 이용해서 SLAM을 구현하였고 안드로이드 앱을 사용하여 주문 결제를, Four Bar Linkage를 사용하여 음식 전달 부분을 구현하였다.