• ETRI Journal
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• v.45 no.5
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• pp.781-794
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• 2023

Uncrewed aerial vehicles (UAVs) have become a vital element in nonterrestrial networks, especially with respect to 5G communication systems and beyond. The use of UAVs in support of 4G/5G base station (uncrewed aerial vehicle base station [UAV-BS]) has proven to be a practical solution for extending cellular network services to areas where conventional infrastructures are unavailable. In this study, we introduce a UAV-BS system that utilizes a high-capacity wireless backhaul operating in millimeter-wave frequency bands. This system can achieve a maximum throughput of 1.3 Gbps while delivering data at a rate of 300 Mbps, even at distances of 10 km. We also present the details of our testbed implementation alongside the performance results obtained from field tests.

• Journal of Korean Academy of Fundamentals of Nursing
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• v.13 no.3
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• pp.474-484
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• 2006

Purpose: This research was done in order to provide basic data for future research on communication and development of programs. Research methods and key areas of previous nursing research on communication in Korea were analyzed. Method: Journals with themes or titles 'nurse-patient communication', 'nursing and communication' and 'interaction between nurse-patient' were searched through internet search engines. Results: The most prevalent research design was survey and nurses were the main participants. Questionnaire was the most frequently used method to obtain the necessary data for the research. The most frequent nursing research topic regarding communication in Korea was the form of the communications such as 'types of communication', and 'organizational communication'. Conclusion: For future nursing research regarding communications in Korea, the participants and themes should be broadened. There is also a need to develop objective methods to measure and assess the results of communication so as to enable actual application of the results of the studies.

• Bulletin of the Korean Space Science Society
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• 2004.10b
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• pp.58-58
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• 2004

• Journal of Families and Better Life
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• v.7 no.2
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• pp.71-83
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• 1989

This paper reviews research on family communication in Korea. The 51 literatures which had been published till 1988 are used to review. The review includes brief summaries of literatures in methodological issues and research findings classified into five major domains ; theoretical understanding, communication in family relationship, relation to human development, family communication in home management, and the use of family communication in family therapy. Some of the major conclusions may be summarized as follows: 1) Family communication research has short history since it begun in 1973. 2) Research method used in almost the survey research. 3) It is difficult to generalize the research findings because of the short of research and the unexquisiteness of methodology, but is is possible somewhat to understand family communication in Korea.

• Journal of Distribution Science
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• v.21 no.1
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• pp.85-93
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• 2023

Purpose: This research is intended to analyze how distribution of brand communication of a Soft Drink brand on brand image mediated through electronic word of mouth on packaged carbonated drink in Indonesian Gen-Z. This research also aims to find out how electronic word of mouth can have a role in creating a brand image for Indonesia Gen-Z. Research design, data and methodology: This research is using a quantitative approach with purposive sampling technique, a survey was conduct online and the number of samples being 384 responders who are spread all over Indonesia. The questionnaire construct was designed based on several variables, such as brand communication, brand image, and e-WOM. E-WOM was positioned as a mediating variable in this research. Brand Communication indicators consist of event and experience, public relation and publicity, direct marketing and personal selling. Meanwhile brand image consists of Attributes, Benefits, and Attitudes. E-WOM indicators consist of intensity, balance of opinion, and content. Results: The result of this research being (1) There is a significant influence between brand communication and brand image. (2) There is a significant influence between brand communication and electronic word-of-mouth. And (3) There is a significant influence between brand communication and brand image mediated through electronic word-of-mouth. Conclusion: The findings of this research prove that there is significant influence between brand communication, brand image and electronic word-of-mouth, this study also provide several information about how other factor affect the distribution of brand communication.

• Proceedings of the Korean Institute of Communication Sciences Conference
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• 2004.11a
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• pp.149-149
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• 2004

• ETRI Journal
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• v.38 no.6
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• pp.1031-1041
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• 2016

This paper presents millimeter-wave (mmWave) propagation characteristics and channel model parameters including path loss, delay, and angular properties based on 28 GHz and 38 GHz field measurement data. We conducted measurement campaigns in both outdoor and indoor at the best potential hotspots. In particular, the model parameters are compared to sub-6 GHz parameters, and system design issues are considered for mmWave 5G Giga communications. For path loss modeling, we derived parameters for both the close-in free space model and the alpha-beta-gamma model. For multipath models, we extracted delay and angular dispersion characteristics including clustering results.

• International Journal of Internet, Broadcasting and Communication
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• v.13 no.2
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• pp.136-144
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• 2021

Railroad Systems, which are national infrastructure industries, cause unexpected property and human damage if they fail to function while operating. Accordingly, railroad facilities supporting the railroad system are areas where high reliability and safety are required. However, it is time for systematic and scientific maintenance to be taken away from the traditional maintenance methods, as the nation's railroad facilities are now aging seriously. The purpose of this study was to secure the safety and reliability of the aging railroad communication facilities and to improve their performance. The research subjects were selected as a precision diagnosis process for railroad communication facilities, and improvement points were derived through detailed precision diagnosis process analysis. It is deemed that this study can contribute based on securing stability, improving reliability, and continuous improvement of railroad communication facilities should be conducted in the operation of the entire railroad system.

• Proceedings of the Korean Magnestics Society Conference
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• 2007.05a
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• pp.135.1-135.1
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• 2007

• Bulletin of the Korean Space Science Society
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• 2006.10a
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• pp.118-118
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• 2006