• Journal of the Korean Society of Radiology
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• v.18 no.2
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• pp.101-108
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• 2024

Recently, Metaverse technology has emerged as an important topic in various fields. Metaverse refers to a three-dimensional virtual space in which social and economic activities similar to the real world are possible. Among the 235 third-year students who applied the Metaversity app in the radiology department of this university from September to December 2023, 200 participated in a survey to determine the difference in student response and satisfaction when applying the Metaversity app. analyzed. First, the most satisfactory VOD viewing method was viewing through the Metaversity app, followed by viewing through the LMS. Second, 'I think online videos are appropriate for holiday reinforcement.' showed the highest score at 4.35±0.60, 'I want face-to-face classes and online classes to be held simultaneously.' was 4.25±0.87, and 'I think meta. 'I watched it well through the Metaversity app' was the lowest at 4.10±0.30, and 'VOD viewing through the Metaversity app was used appropriately in class' was the lowest at 3.99±0.75. Also, there was no significant difference in the response to the teaching method (p>0.05). Third, in terms of satisfaction with VOD viewing using the Metaversity app, 'Applying the Metaversity app was interesting and fun' ranked the highest at 4.24±0.88. The score was high, with 'Better improvement is needed to actively utilize the metaversity app' at 4.00±0.45, and 'I hope the metaversity app is implemented in other remote classes' at 3.77±0.88. appear. 'VOD classes through the Metaversity app are better than the existing LMS method.' was found to be 3.44±0.66. Additionally, there was no significant difference in satisfaction with classes according to age and gender (p>0.05). The correlation between response and satisfaction with the metaversity app is 0.601, which can be considered very significant (p>0.001). As a limitation of this study, although we surveyed students' satisfaction with using the Metaversity app, we were unable to investigate the satisfaction of instructors who interact with students. In the future, we did not consider the instructor's satisfaction in classes using the Metaversity app. Research must be conducted, and universities must have institutional support and continued interest until metaversity apps are selected and used to prepare for distance learning.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2011.06a
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• pp.368-369
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• 2011

북항 재개발사업에 대한 기대와 관심은 항만시설의 기능성과 효용의 차원과 나란히 지역민의 정체성에도 깊이 뿌리닿아 있는 문제다. 이러한 의미에서 북항의 이슈와 함께 해항도시는 자신의 항구적 문화적 전통과 정체성을 어떻게 유지하며 발전시켜 나가는가라는 근본적이고도 광범위한 의문이 자연스럽게 제기된다. 본 연구에서는 이러한 논의의 확장과 심화를 위해, 독일 함부르크의 사례를 살펴볼 것이다. 함부르크의 슈파이허슈타트와 발린슈타트, 그리고 하펜시티는 도시를 의미하는 슈타트, 시티라는 명칭을 통해서 그 공간이 단지 하나의 건물, 장소에 머무르는 것이 아님을 암시하고 있다. 본 연구는 슈파이허슈타트의 경우는 함부르크 원도시와 일종의 제유법적 관계로서 읽고자 한다. 이러한 의미에서 슈파이허슈타트가 건설된 역사적 사회적 맥락을 논의하고, 이러한 맥락이 어떻게 공간적 시각적으로 확인될 수 있는가를 슈파이허슈타트와 원도심간의 교각을 통하여 확인해 볼 것이다.

• Proceedings of the KIPE Conference
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• 2015.07a
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• pp.27-28
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• 2015

무선 전력 전송 방법은 자기장을 이용하는 인덕티브 커플링 방식과 자기 공진 방식, 그리고 전기장을 이용하는 커패시티브 커플링 방식으로 나눌 수 있다. 커패시티브 커플링 무선 전력 전송 방식은 인체에 대한 영향성이 없고, 전자기파 방해가 없다는 큰 장점을 갖고 있다. 본 연구에서는 커패시티브 커플링 무선 전력 전송에서 물리적으로 만들어진 커패시턴스를 크게 얻기 위하여 유리 유전체를 사용하고 동작 주파수를 매우 높게 하여 커패시턴스의 임피던스를 작게 보이도록 하게 하였다. 또한 좀 더 높은 입출력 전압비를 얻고, MOSFET의 스위칭 손실을 최소화 하기 위하여 커패시티브 커플링 무선 전력 전송에 적합한 MHz LLC 공진형 컨버터를 제안하였다. 제안한 컨버터는 모바일 기기 충전을 위한 4.2W 시스템을 구성하여 검증하였다.

• Proceedings of the Korea Information Processing Society Conference
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• 2019.10a
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• pp.272-275
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• 2019

랜섬웨어는 더욱 지능화되고 표적화된 공격이 예상되고 클라우드와 사물인터넷 기기의 확산으로 공격의 범위 또한 지속적으로 확대될 것으로 보인다. 특히, 이러한 사물인터넷 기기들은 스마트 시티를 위한 기본 구성요소로 인식되므로 다양한 보안을 위한 연구가 진행되어야 한다. 본 논문에서는 데이터 중심의 스마트 시티를 위한 보안 요구사항 분석을 통해 다양한 스마트 시티 관련 공격을 살펴본다. 또한, 이러한 공격을 보안 서비스에 초점을 맞춰 분류한다. 이렇게 제시된 분류는 다양한 데이터 중심의 스마트 시티를 위한 보안 시스템 구축에 도움이 될 수 있을 것으로 기대한다.

• Informatization Policy
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• v.27 no.4
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• pp.67-84
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• 2020

This study proposes a smart city service revitalization policy based on communication facility infrastructure in 5G CPS - the core of the 4th industrial revolution, R&D, and related legislations. The 5G CPS is a converged form of ICT technologies, communications facilities, and physical systems. In this study, we propose methods of creating new services for the smart city domain based on communication facilities and the cloud platform in 5G CPS - first, by improving the communication methods classification system based on the facility scale; second, by establishing the national telecommunication facility infrastructure and making long-term investment; third, by reorganizing the Smart City Act aimed at activating new services; and lastly, by expanding the national data analytics R&D and policy support.

• Journal of Platform Technology
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• v.12 no.2
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• pp.45-57
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• 2024

Smart cities are the product of modern urban planning that seeks to innovate information and communication technology and improve the quality of urban life. For the efficient operation of smart cities, data collected, stored, and processed in real time is a key resource. Therefore, data from smart cities collected in various fields must be managed safely, and personal information protection is paramount. In this study, a smart city data security model using blockchain technology was proposed to safely manage smart city data. The proposed model integrates IPFS into the blockchain network to distribute and store data to ensure data confidentiality and integrity, and encrypts data using CP-ABE to efficiently control access to data from users. In addition, privacy was guaranteed while enhancing the usability of data by using Homomorphic Encryption with data access control policies.

• Journal of the Korea Convergence Society
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• v.9 no.9
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• pp.191-197
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• 2018

With a population of more than 10 million people worldwide, MegaCity was only three in 1975, but it is expected to grow to 24 in 2013 and more than 30 in 2025 and more than 3 billion worldwide by 2050 It is expected to be absorbed into smart city. Especially in Asia and Africa, urbanization is expected to proceed rapidly. As the urbanization progresses and the population living in the cities increases, there are various problems such as rapid increase of energy consumption, congestion of traffic, various aging of the infrastructure and the like. As a result, smart city is emerging as a new alternative for solving urban problems. Smart City is rapidly expanding with the development of related technologies and can improve costs, improve urban services, improve quality of life, productivity and sustainability. Therefore, this paper analyzes the size and trend of the domestic and overseas smart city market, and analyzes the smart city related policies, trends and case studies of major countries to see the development status and market of smart city related industries, Present a business utilization model.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.17 no.5
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• pp.388-396
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• 2016

The concept of the Slow City originates from the philosophy that seeks nature and a human-centric lifestyle. The objective of this study is to provide education for local residents in the socioeconomic traits of Slow City. For this study, 445 residents were surveyed about the concept of the Slow City. Using the survey results, t-test and regression analyses were conducted to find areas of improvement by considering the significance and effect level. The purpose of this study is to suggest a strategy of education for local residents based on the effect of socioeconomic traits on the residents' attitude and education satisfaction. The findings showed that local residence is more influential on the residents' attitude than age, income and education and that the number of participations in the education did not affect education satisfaction. This result suggests that more reinforced and improved local resident education should be offered for the Slow City education of residents. This study provides a convenient set of indicators for a strategic focus to develop education programming and policy for Slow City residents.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.20 no.6
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• pp.201-209
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• 2019

This study aimed to find out the morphological evolution process for future vision of world smart city. The contents and methods of study was divided and compared by 4 continents and Korea focused on the convergence numbers of ET and IT in smart city and did correlation analysis and analysis of convergence number in device/technology by periods. The analysis materials were 32 cases of smart city in whole world and times were 4 periods. The results of study were listed below. First, the smart city in period 1 was morphological evolutions preserved environment and kept natural form of existing city and filled up device/technology. Second, the smart city in period 2 was morphological evolutions through ET-centric development. Third, the smart city in period 3 was morphological evolutions through advancement of ET and device/technology related to production of energy. Forth, the smart city in period 4 was morphological evolutions fusing, dissipating and creating new ET and IT through the advancement process of all technologies. In conclusion, morphological evolution of smart city will change systematic city structure of convergence form, not each discriminating development between ET and IT, and the forming of smart city will be evolved by repetitive convergence process of technologies continually.

• The Journal of the Korea Contents Association
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• v.18 no.7
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• pp.330-337
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• 2018

Recently, there has been a growing interest in user-centered smart city services. In this study, user behavior analysis was performed as a preliminary study for user - centered smart city service planning. In particular, we will use GIS based location analysis data and video ethonography methodology to derive smart city service direction and needs. In this study, the area of Daejeon Design District selected as the Smart City Test bed was selected as the survey area and the location analysis data of the traffic accident analysis system of the road traffic corporation and the fixed camera We observed user's behavior type and change with image data extracted through the technique. Location analysis data is classified according to the type of accident, and image data is classified into 11 subdivided types of user activities. The problems and specificities observed were analyzed. The user behavior characteristics investigated through this study are meaningful to provide a basis for suggesting user - centered smart city services in the future.