• Journal of Communications and Networks
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• 제18권5호
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• pp.806-817
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• 2016

Opportunistic routing (OR) has been proposed as a viable approach to improve the performance of wireless multihop networks with lossy links. However, the exponential growth of the bandwidth-sensitive mobile traffic (e.g., mobile video streaming and online gaming) poses a great challenge to the performance of OR in term of bandwidth guarantee. To solve this problem, a novel mechanism is proposed to opportunistically forwarding data packets and provide bandwidth guarantee for the bandwidth-sensitive traffic. The proposal exploits the broadcast characteristic of wireless transmission and reduces the negative effect of wireless lossy links. First, the expected available bandwidth (EAB) and the expected transmission cost (ETC) under OR are estimated based on the local available bandwidth, link delivery probability, forwarding candidates, and prioritization policy. Then, the policies for determining and prioritizing the forwarding candidates is devised by considering the bandwidth and transmission cost. Finally, bandwidth-aware routing algorithm is proposed to opportunistically delivery data packets; meanwhile, admission control is applied to admit or reject traffic flows for bandwidth guarantee. Extensive simulation results show that our proposal consistently outperforms other existing opportunistic routing schemes in providing performance guarantee.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제12권7호
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• pp.2977-2997
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• 2018

In big data era, fresh data grows rapidly every day. More than 30,000 gigabytes of data are created every second and the rate is accelerating. Many organizations rely heavily on real time streaming, while big data stream computing helps them spot opportunities and risks from real time big data. Storm, one of the most common online stream computing platforms, has been used for big data stream computing, with response time ranging from milliseconds to sub-seconds. The performance of Storm plays a crucial role in different application scenarios, however, few studies were conducted to evaluate the performance of Storm. In this paper, we investigate the performance of Storm under different application scenarios. Our experimental results show that throughput and latency of Storm are greatly affected by the number of instances of each vertex in task topology, and the number of available resources in data center. The fault-tolerant mechanism of Storm works well in most big data stream computing environments. As a result, it is suggested that a dynamic topology, an elastic scheduling framework, and a memory based fault-tolerant mechanism are necessary for providing high throughput and low latency services on Storm platform.

• 한국컴퓨터정보학회지
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• 제14권1호
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• pp.185-196
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• 2006

이 논문에서는 국제 학습 콘텐츠 표준인 SCORM을 지원하는 공개 소프트웨어 기반의 학습관리 시스템을 구축하기 위해, 기존 학습 관리 시스템을 비교 분석하여 무들(Moodle)을 선정하였고 학사관리시스템, 스트리밍서비스 등의 기존 시스템들과 연동 운용함으로써, 공개 소프트웨어 기반 학습관리 시스템의 현실적 가능성을 보였다. 공개 학습 관리 시스템인 무들은 모듈화 구조를 수용해 사용의 편의성과 확장성을 충분히 제공하고 있으며, SCORM지원을 원활하게 하고 있다. 또한, 사회적 구성주의 학습 이론을 기반으로 설계, 구현되어 있다는 중요한 장점을 갖고 있다. 이 연구는 학습 관리 시스템을 포함한 공개S/W 기반 e-Learning시스템 구축이 안정적으로 가능하다는 것을 보였다.

• Archives of Plastic Surgery
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• 제46권2호
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• pp.102-107
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• 2019

Mobile computing devices (MCDs), such as smartphones and tablets, are revolutionizing medical practice. These devices are almost universally available and offer a multitude of capabilities, including online features, streaming capabilities, high-quality cameras, and numerous applications. Within the surgical field, MCDs are increasingly being used for simulations. Microsurgery is an expanding field of surgery that presents unique challenges to both trainees and trainers. Simulation-based training and assessment in microsurgery currently play an integral role in the preparation of trainee surgeons in a safe and informative environment. MCDs address these challenges in a novel way by providing valuable adjuncts to microsurgical training, assessment, and clinical practice through low-cost, effective, and widely accessible solutions. Herein, we present a review of the capabilities, accessibility, and relevance of MCDs for technical skills acquisition, training, and clinical microsurgery practice, and consider the possibility of their wider use in the future of microsurgical training and education.

• International Journal of Knowledge Content Development & Technology
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• 제11권2호
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• pp.77-105
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• 2021

In order to establish a digital-based use environment for the provision of new information services suitable for the 5G era, it is necessary to discuss the direction of service provision by the National Library of Children and Young Adults in the 5G era. Based on utilization services in other fields, library services in the 5G era, including the development and provision of employee education and training services, ultra-high-definition and 360-degree realistic contents and education on library use, provision of multi-dimensional realistic media streaming broadcasting services, provision of telepresence education programs, activation of virtual communities, implementation of hologram performance halls/exhibit centers, and provision of unmanned book delivery services, environment monitoring, safety monitoring, and customized services, were proposed. In addition, based on 5G service, 5G technology, and library application direction, advancing into a producing and supporting base for ultra-realistic and immersive contents in the 5G era, strengthening online and mobile services in the non-contact era, and establishing a smart library environment were proposed as the service provision direction for the National Library of Children and Young Adults in the 5G era.

• 유통과학연구
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• 제21권6호
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• pp.13-20
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• 2023

Purpose: This research explores the development of music business distribution channels to attract potential customers based on the current and prior literature. As a result, the research will provide solutions for practitioners in the music distribution channel how they create effective channel in new industry phase which has experienced significant changes due to technological advancement and consumer behavior. Research design, data, and methodology: To obtain textual data in the literature storage, the author conducted content analysis. Even though there are numerous textual resources, selecting only high-quality text data that is only peer-reviewed journal articles and books consistently indicate a high degree of reliability and validity to keep the advantage form content analysis approach. Results: The present study figured out that there are five strategies to attract potential consumers in the music distribution channel, such as (1) 'Marketing Mix', (2) 'Streaming Platforms and Online Music Stores', (3) 'Brick and Mortar Stores and Concerts, and Events', (4) 'Platforms Exclusives and Limited-Edition Merchandise', and 'Partnerships and collaborations. Conclusions: In sum, the practitioners need to consider include building relationships with the fans, studying and understanding their target market, utilizing multiple available distribution channels, embracing new technologies, and analyzing the effectiveness of the adopted distribution channels.

• 디지털산업정보학회논문지
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• 제19권3호
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• pp.1-11
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• 2023

Unlike in the past, when the demand for web content was increasing and the use behavior of watching short videos was changed, unlike the past when only TV dramas and differentiation were mentioned, web dramas are more firmly established through various attempts. A typical form change is commerce of web dramas. Recently, more and more cases have been produced in the form of product sales by securing real-time functioned, which are disadvantages of commerce, through web dramas. In this trend, web dramas are also increasing interest in product sales. This can be said to be a form developed from the concept of a company's PPL, and the number of companies that use web dramas that predict continuous growth as strategic product promotion and marketing means is continuously increasing. Therefore, this study provides basic data on consumer behavior to collect product information and purchase products using web dramas to companies that are using or considering web dramas, and through this, companies design and establish marketing strategies using web dramas.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2022년도 춘계학술대회
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• pp.596-598
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• 2022

모바일은 단순한 콘텐츠 소비도구를 넘어 독점적 플랫폼 역할로 확장되어 가고 있다. 모바일 콘텐츠란 모바일 기기를 이용한 업체들의 서비스를 말한다. 장점은 이용자의 행동을 실시간으로 분석할 수 있어서 취향에 맞춰 만족도를 높일 수 있다. 반면 단점은 편리한 온라인 결제환경으로 미성년자들이 쉽게 유료결제를 할 수 있다. 콘텐츠 무단도용플랫폼을 사용하지 않고 자극적인 미디어에 무방비하게 노출되지 않도록 조심해야한다. 또한 모바일 콘텐츠 플랫폼의 순기능을 키우고 역기능을 줄이는 방안을 모색하여야 할 것이다.

• 복식
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• 제64권1호
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• pp.136-151
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• 2014

This study systematically analyzed types of fashion brand application focusing on accounts created in Korea. While referring to 'Chanel' which has developed a fashion brand app for the first time in August of 2008, not only for App store by Apple Inc. of the greatest market share but also for Android market, the one and only competitor of App store, the study examined cases of fashion brand app in Korea and foreign countries which have been in service till August of 2013 since the year of 2008. To achieve the research goal, the study conducted a literature research and a case review, categorizing the app by their distinctive functions which were Basic Information, SNS, AR, LBS, Entertainment, Mobile Shopping and Live Streaming. As for the first function, Basic Information, it was considered to provide information on a brand such as prices, sizes and colors of products which should be the most fundamental function of a fashion brand. The function would include look book, catalogues, photographs and others of products, helping users of the app with their understanding on images and concepts of the brand. Second, SNS function was considered useful for its mobility and communication and with the help of theirs, the users share fashion information with each other. Third, AR function as in a filed of virtual reality would edit virtual objects to look real in an actual environment. This would eventually offer the users a chance to try for clothes virtually. The fourth function, LBS, would work with GPS to find a store closest from a present location. This would be a help when the users try to find stores holding promotion events or trails while hiking in mountains. The fifth Entertainment function would include all sorts of games and chances for the users to listen to music and keep fashion diaries. The sixth function, Mobile Shopping, would help the users purchase items online via the app as they would not visit a store in person. The seventh function, Live Streaming, would give the users chances to actually see fashion collections in real time, held all over the world in every season. Because of this function, not only fashion experts but also regular people have become able to enjoy the fashion shows. The distinctive characteristics of the fashion brand application discussed in the study will be a useful reference when any relevant fields try to design other new fashion brand application.

• 한국컴퓨터정보학회논문지
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• 제27권4호
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• pp.169-181
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• 2022

현재 SNS 라이브방송이 활성화로 인해 인플루언서 생방송에 기반을 둔 온라인 서비스가 전세계 주요 소비 트렌드가 되고 있다. 본 연구는 인터넷 환경에서 인플루언서 방송을 통해 소비자들이 느끼는 인플루언서 방송에 대한 서비스품질, 고객만족, 제품특성과 수용의도 간의 관계들을 검증하고자 한다. 본 연구는 대만 SNS 라이브방송을 체험한 이용자들을 대상으로 2020년 6월 29일 부터 8월 30일 까지 구글 설문지를 통하여 조사를 실시하였으며, 총 253부를 실증분석에 사용하였다. 수집된 자료는 SPSS 25.0을 통해 분석을 실시하였다. 실증분석 결과를 요약하면 다음과 같다. 첫째, 대만 인플루언서 라이브방송의 서비스품질 요인(신뢰성, 유형성, 응답성, 확신성, 공감성)은 생방송 만족도에 유의한 영향을 미치는 것으로 나타났다. 둘째, 대만 인플루언서 라이브방송의 제품특성이 제품 만족도에 유의한 영향을 미치는 것으로 나타났다. 셋째, 대만 인플루언서 라이브 방송에서 생방송 만족도와 제품 만족도는 신규 브랜드 수용의도에 유의한 영향을 미치는 것으로 나타났다. 본 연구를 통해 대만 인플루언서 라이브 방송의 서비스품질 요인 및 제품특성을 파악함으로써 생방송 및 제품 만족도를 향상시키고 신규 브랜드 수용의도를 증가시키기 위한 효율적인 마케팅 전략 방안을 수립하는데 유용한 자료를 제공할 수 있을 것이다.