• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2016.10a
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• pp.638-641
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• 2016

UHD(Ultra High Definition) broadcasting is an attractive next-generation service of realistic broadcasting that enables you to feels like listening on the spot in ultra-high definition resolution. In addition, the test broadcasting run by UHD broadcasting agencies and UHDTV terminal launch could herald the full-scale UHD broadcasting era. However, in order that UHD broadcasting will be activated, the function of conditional access control and information protection through which we can on pay per view watch the programs of subscriber preference from the channels of various and subdivided genres is essential. To provide a technical foundation for these features and to achieve the UHD TV transition early, determining technology development & standardization strategy through the analysis of the key protection technologies is required In this paper, we propose standardization technologies which our country can lead and present a long-term driving directions by analyzing UHD broadcasting technology & test broadcasting trends and content protection technology & standardization trends.

• Journal of Cadastre & Land InformatiX
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• v.49 no.1
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• pp.113-121
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• 2019

The fourth industrial revolution technology focused on the fusion of infrastructure and various advanced technologies related city. Therefore, technical cooperation in various fields of research is essential. In order to activating the fourth industrial revolution technologies, it is necessary to research the state of technology in various fields. Consequently, this paper aims to analysis of domestic and foreign research trends on technology to the fourth industrial revolution using SNA and text mining for web site. We collected text, date data of research paper and report in web site for five years, that is, from January 1st in 2014 to December 31st in 2018. Next, we have deduced the major keywords in public data through analyzing the morphemes. Then we have analyzed the core and related keyword lists through an SNA. In Korea, the focus is on R&D and legal/institutional solution in relation to the fourth industrial revolution technology. On the other hand, in the case of foreign, there was focus on practical technologies for urban services in detail aspects.

• Convergence Security Journal
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• v.18 no.1
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• pp.61-67
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• 2018

IoT technology is currently being applied at various industrial sites and is developing as a core technology in the fourth industrial revolution. Along with IoT developments, awareness and importance of IoT security is increasing, and research on IoT security is underway to counter these threats. However, research trends in the context of IoT security awareness are insufficient. This paper is a research that analyzes the progress of R&D and IoT security in both domestic and international IoT and thus leads to improvements. The research covered the 229 papers and articles of domestic and foreign journals covering security fields as a main theme. Among them, detailed analyses of 96 papers related to IoT security were performed. Research has shown that many studies are being conducted on trends in IoT security, key management and privacy. A detailed study on the characteristics of services to apply IoT technologies and access control and authentication between IoT devices is needed, and a study that addressed the issues of privacy in IoT environments in Korea.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.25 no.4
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• pp.581-587
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• 2021

Real-time video streaming scheme for multimedia content delivery and remote conference services is one of technologies that are significantly sensitive to data transmission delay. Recently, because of COVID-19, real-time video streaming contents for the services are significantly increased such as personal broadcasting and remote school class. In order to support the services, there is a growing emphasis on low transmission delay and secure content delivery, respectively. Therefore, our research proposed a packet aggregation algorithm to reduce the transmission delay of selectively encrypted video transmission for real-time video streaming services. Through the application of the proposed algorithm, the selectively encrypted video framework can control the amount of MPEG-2 TS packets for low latency transmission with a consideration of packet priorities. Evaluation results on testbed show that the application of the proposed algorithm to the video framework can reduce approximately 11% of the transmission delay for high and low resolution video.

• Journal of the Institute of Convergence Signal Processing
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• v.23 no.1
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• pp.15-20
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• 2022

An improvement of computational resources with a large scale cluster service is available to the individual person, which has been limited to the original industry and research institute. Therefore, the application of powerful computational resources to the engineering design has been increased fast. In naval and marine industry, the application of Computational Fluid Dynamics, which requires a huge computational effort, to a design of ship and offshore structure has been increased. Floating bodies such as the ship or offshore structure is exposed to ocean waves, current and wind in the ocean, therefore the precise modelling of those environmental disturbances is important in Computational Fluid Dynamics. Especially, ocean waves has to be nonlinear rather than the linear model based on the superposition due to a nonlinear characteristics of Computational Fluid Dynamics. In the present study, a fast reconstruction technique is suggested and it is validated from a series of simulations by using the Computational Fluid Dynamics.

• The Journal of the Korea Contents Association
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• v.22 no.2
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• pp.44-57
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• 2022

Fablab is a global network of digital fabrication facilities. Fablab is a digital workshop for individual manufacturing. In addition, Fablab is a next-generation digital infrastructure that connects education, training, R&D and production. The Fablab is a facility lab that makes the products you want, and it is a space where users-led products or services are discovered for the community. Furthermore, through various citizen-led projects, it is playing the role of innovation that changes the region and society. In this study, we examine the operating conditions of Fablabs in Korea and Japan (Fablab Seoul, Fablab Busan, Fablab Kamakura and Fablab Kitakagaya). It also explores the business model and sustainable development potential of each fablab. To this end, first, we compare and analyze the use of fablabs in both countries. Second, the purpose of the fablabs of both countries is analyzed. Third, we analyze the business models that the fablabs of both countries are taking for sustainable development through Lean Canvas. Based on the results obtained through case analysis of both countries, we make suggestions for the development of fablabs in Korea.

• Journal of Intelligence and Information Systems
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• v.29 no.3
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• pp.341-359
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• 2023

The metaverse applies various technological means such as digital twin modeling, 3D rendering, and holographic imaging, which can provide an immersive tourism service experience. However, since the development of the metaverse is still in its infancy, there is relatively little research on digital tourism from the perspective of the metaverse. This research empirically studies the factors that promote the participation behavior of users on the metaverse platform for digital cultural tourism. Our results show that users' internal motivations for learning and entertainment and the functions provided by metaverse, which are sensory stimulation and social interaction lead to the intention to participate in cultural tourism on metaverse with the mediating effects of immersion experience and perceived pleasure.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2021.11a
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• pp.201-202
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• 2021

Regulations on greenhouse gases emitted from ships in international shipping are being strengthened, and the greenhouse gas reduction target established by the International Maritime Organization is acting as a great challenge for shipping companies in terms of technical and operational aspects. The International Maritime Organization aims to reduce carbon intensity by 30% by 2030, 70% by 2050, and by 50% in terms of gross emissions compared to 2008. To realize this situation, the IMO adopted some short-term and mid-to-long-term measures and adopted technical measures such as the application of EEXI, an energy efficiency index, to existing ships from 2023, and the early application of EEDI phase 3 for some tpe of ships. In addition, reduction measures were introduced to reduce greenhouse gas in the operational aspect.

• The Journal of the Korea institute of electronic communication sciences
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• v.18 no.6
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• pp.1299-1306
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• 2023

In this paper, we present a system for undesignated cultural heritage management and real-time theft chase, which uses flash-based large-capacity storage. The proposed system is composed of 3 parts, such as a cultural management device, a flash-based server, and a monitoring service for managing cultural heritages and chasing thefts using IoT technologies. However flash-based storage needs methods to overcome the limited lifespan. Therefore, in this paper, we present a system, which uses the disk buffer in flash-based storage to overcome the disadvantage, and evaluate the system performance in various environments. In our experiments, LRU policy shows the number of direct writes in the flash-based storage by 10.7% on average compared with CLOCK and FCFS.

• Information Systems Review
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• v.19 no.1
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• pp.169-183
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• 2017

As global competition is heating up and product life cycle has been rapidly shortened, each company pursues a variety of competitive technology innovations through different means of innovation. In this study, we assume that open innovation can be a shift motive of the technology innovation paradigm of small and medium enterprises (SMEs) being beyond the limitations of R&D within a company. We analyze the process and content of open innovation and performance. In addition, we identify the problems generated in the open innovation process and analyze the ways to strengthen open innovation. This study is based on the investigations into the technological competitiveness of local SMEs. The innovation ecosystem is analyzed from the perspective of product/service innovation, organizational innovation, and marketing innovation. Situational analysis is presented on the relationship between the innovation capabilities of information and communication technology SMEs and innovation performance.