• 무역학회지
• /
• 제44권6호
• /
• pp.327-344
• /
• 2019

This paper explores the hub-and-spoke system as the structure of the global economic network that presents obstacles for international cooperation. With its exclusive jurisdiction and control over the hub, a powerful state can employ coercive economic measures to compel and deter unwanted behavior of rogue states and even its allies. Against this backdrop, this study analyzes the cases of the US blocking access to its market by Chinese Huawei as well as the case of Japan in restricting trade for highly advanced goods to South Korea. This analysis reveals that both measures are forms of secondary boycotts, which affect not only the entities within their jurisdiction but also others located in third countries. In addition, this paper extends its findings to free trade agreements and offers implications on the outward processing scheme for the Gaeseong Industrial Complex in the KORUS FTA and the Korea-China FTA. These events result in a gray-risk for South Korea, a country that aims to resolve North Korea's denuclearization and inter-Korean economic cooperation.

• 수완나부미
• /
• 제15권2호
• /
• pp.57-90
• /
• 2023

China launched the Digital Silk Road (DSR) in 2015 as part of the existing Belt and Road Initiative (BRI) to expand its influence in digital and technological development across Asia, Europe, and Africa. Southeast Asia is one of the key targets of the Digital Silk Road due to its geographical proximity to China and the rapid growth of the digital sphere. Although the DSR opens several potential opportunities for the Association of Southeast Asian Nations (ASEAN) member states to foster the digitalization process in the region, how each country reacts to projects under the DSR is varied. Secondly, Vietnam is the only ASEAN member state that has not signed any official agreement under the BRI framework, and thirdly, Vietnam opted out of Huawei technology. This paper aims to understand the perspective of Vietnam and how Vietnam has responded to the growing technological presence of China in Southeast Asia until 2021. By using qualitative methods, the author argues that the DSR has allowed Beijing to overcome the limitations of the original strategy, BRI, and strengthen its influence in the field of information and communication technologies, particularly fifth-generation (5G) telecommunications. Furthermore, the paper examines Vietnam's digital development and digital diplomacy and how the Vietnamese government has responded to DSR projects. In light of both the potential threats and economic benefits that the DSR has brought to Vietnam and Southeast Asian countries, in the last section, the policy implications for cooperation are discussed.

• 한국정보통신학회논문지
• /
• 제21권1호
• /
• pp.123-129
• /
• 2017

고성능 카메라와 고용량 메모리가 장착된 스마트폰이 출시되어 사람들은 야외나 산에서 촬영한 아름다운 경치, 꽃 등을 SNS에 많이 올리고 있다. 본 논문에서는 이동통신이 원활하지 않은 곳에서도 꽃의 정보를 얻을 수 있는 꽃 인식 시스템을 개발한다. 개발된 시스템은 OpenCV를 기반으로 안드로이드 스마트폰에서 사용할 수 있으며, 기준 꽃등록부와 꽃인식부로 구성된다. 인식처리 시간을 줄이기 위하여 RGB 색채널과 k-평균 클러스터링을 이용한 새로운 색분류방법을 제안하고, 특징 추출을 위하여 ORB, 매칭을 위하여 브루트포스 해밍 알고리즘을 사용한다. 4부류의 12 종류의 꽃에 대하여 60개의 이미지를 기준 DB 설계에 사용하고, 60개의 이미지를 테스트에 사용하였다. 모의 실험 결과 성공률은 83.3%이고, 화웨이 ALEUL100 스마트폰에서 평균인식 시간은 2.58 s 이며, 제안된 시스템은 통신이 되지 않는 곳에서도 휴대용 스마트폰에 적용가능하다는 것을 확인하였다.

• 인터넷정보학회논문지
• /
• 제18권1호
• /
• pp.153-160
• /
• 2017

많은 국내 IT 기업의 노력 및 성과와 정부의 지원정책을 바탕으로 2015년 우리나라의 IT 수준이 세계 8위로 산정되었다. 특히 한국은 인터넷과 관련한 유무선망과 초고속 서비스에 있어 상대적 우위에 있다. 하지만 많은 실무자들과 학술 전문가들은 인터넷 강국이라는 자부심을 갖는 동시에 연구에 대한 미흡한 관리를 염려하기 시작했다. 본 연구는 인터넷 관련 이슈를 파악하고, 최근 정보기술 전반의 동향을 고찰하여 정리하였다. 그리고 이들을 바탕으로 인터넷 관련 연구의 분야를 도출하여 제시하고, 인터넷정보학회 논문지에 게재된 연구논문을 조사하여 최근 인터넷 관련 연구의 추세를 파악하고 향후 연구 전망을 제시하였다. 결론적으로 본 연구에서 제시된 20개의 연구 분야에서 꾸준한 연구가 이루어졌고 최근 들어 연구가 더욱 활발히 진행되고 있는 것으로 나타났다. 또한 연구 이슈별 논문게재 증감 추이와 최신 정보기술 동향을 고려할 때, 미래형 네트워크, 멀티미디어 응용, 빅 데이터, 인공지능, 인터넷 보안 분야의 연구 수요가 급증할 것으로 전망하였다.

• The Journal of Asian Finance, Economics and Business
• /
• 제7권7호
• /
• pp.463-474
• /
• 2020

This study aims to investigate the impact of COVID-19 pandemic on the stock markets of sixteen countries. Pooled OLS regression, conventional t-test and Mann-Whitney test are used to estimate the results of the study. We construct a weekly panel data of COVID-19 new cases and stock returns. Pooled OLS estimation result shows that the growth rate of weekly new cases of COVID-19 negatively predicts the return in stock market. Next, the returns on leading stock indices of these countries during the COVID-19 outbreak period are compared with returns during the non-COVID period. We use a t-test and Mann-Whitney test to compare the returns. The results reveal that investors in these countries do not react to the media news of COVID-19 at the early stage of the pandemic. However, once the human-to-human transmissibility had been confirmed, all of the stock market indices negatively reacted to the news in the short- and long-event window. Interestingly, we noticed that the Shanghai Composite Index, which was severely affected during the short-event window, bounced back during the long-event window. This indicates that the Chinese government's drastic measures to contain the spread of the pandemic regained the confidence of investors in the Shanghai Stock Market.

• KSII Transactions on Internet and Information Systems (TIIS)
• /
• 제11권11호
• /
• pp.5301-5323
• /
• 2017

Small cell deployment offers a low-cost solution for the boosted traffic demand in heterogeneous cellular networks (HCNs). Besides improved spatial spectrum efficiency and energy efficiency, future HCNs are also featured with the trend of network architecture convergence and feasibility for flexible mobile applications. To achieve these goals, dual connectivity (DC) is playing a more and more important role to support control/user-plane splitting, which enables maintaining fixed control channel connections for reliability. In this paper, we develop a tractable framework for the downlink SINR analysis of DC assisted HCN. Based on stochastic geometry model, the data-control joint coverage probabilities under multi-frequency and single-frequency tiering are derived, which involve quick integrals and admit simple closed-forms in special cases. Monte Carlo simulations confirm the accuracy of the expressions. It is observed that the increase in mobility robustness of DC is at the price of control channel SINR degradation. This degradation severely worsens the joint coverage performance under single-frequency tiering, proving multi-frequency tiering a more feasible networking scheme to utilize the advantage of DC effectively. Moreover, the joint coverage probability can be maximized by adjusting the density ratio of small cell and macro cell eNBs under multi-frequency tiering, though changing cell association bias has little impact on the level of the maximal coverage performance.

• 문화기술의 융합
• /
• 제6권4호
• /
• pp.203-208
• /
• 2020

미국과 중국의 무역전쟁이 수년 간 지속되고 있고, 미국의 중국통신기업에 대한 제재는 점점 강화되고 있다. 이런 재제에도 중국의 대표적 통신장비업체인 ZTE(중싱)은 글로벌 5세대 이동통신(5G) 시장에서 점유율을 오히려 확대하고 있다. 이러한 ZTE의 성장과 경쟁력은 ZTE의 독특한 기업문화에 기반하고 있다. ZTE는 연구개발을 중시하며, 적재적소에 인재배치 및 활용, 중국 전통문화에 기반하여 겸손과 절제, 중용의 '온정문화(溫情文化)'라는 기업문화를 가지고 있다. ZTE는 사람중심 경영을 구현하기 위해 노력하면서, 내부경쟁을 적절히 활용하고 있다. ZTE의 기업문화는 상호 존중, 충실함, 혁신, 우수한 서비스, 연구개발과 브랜드 중시, 직원배려와 과학적 관리의 결합 등으로 설명된다. ZTE의 세계적 시장점유율과 기업경쟁력에도 불구하고, 한국에서는 연구된 바가 사실상 전무하다. 본 연구결과를 통해, 중국의 ICT산업과 통신장비기업에 대한 이해의 폭을 넓히고자 한다.

• Wind and Structures
• /
• 제27권5호
• /
• pp.325-336
• /
• 2018

The physical infrastructure of the power systems, including the high-voltage transmission towers and lines as well as the poles and wires for power distribution at a lower voltage level, is critical for the resilience of the community since the failures or nonfunctioning of these structures could introduce large area power outages under the extreme weather events. In the current engineering practices, single circuit lattice steel towers linked by transmission lines are widely used to form power transmission systems. After years of service and continues interactions with natural and built environment, progressive damages accumulate at various structural details and could gradually change the structural performance. This study is to evaluate the typical existing transmission tower-line system subjected to synoptic winds (atmospheric boundary layer winds). Effects from the possible corrosion penetration on the structural members of the transmission towers and the aerodynamic damping force on the conductors are evaluated. However, corrosion in connections is not included. Meanwhile, corrosion on the structural members is assumed to be evenly distributed. Wind loads are calculated based on the codes used for synoptic winds and the wind tunnel experiments were carried out to obtain the drag coefficients for different panels of the transmission towers as well as for the transmission lines. Sensitivity analysis is carried out based upon the incremental dynamic analysis (IDA) to evaluate the structural capacity of the transmission tower-line system for different corrosion and loading conditions. Meanwhile, extreme value analysis is also performed to further estimate the short-term extreme response of the transmission tower-line system.

• 디지털융복합연구
• /
• 제17권11호
• /
• pp.117-126
• /
• 2019

본 연구는 휴대폰 오프라인 매장에 초점을 맞추어 고객이 매장을 방문하여 제품을 실제로 체험하기 이전의 고객참여 수준 및 브랜드와 맺은 관계몰입이 매장에서의 체험에 어떠한 영향을 줄 수 있는지를 분석하였다. 애플, 화웨이, 샤오미, 삼성 등 휴대폰 오프라인 매장을 체험한 259명 중국 소비자들을 대상으로 데이터를 수집하였다. 연구결과로는 첫째, 고객참여가 브랜드에 대한 규범적 몰입, 감정적 몰입, 지속적 몰입에 모두 유의한 영향을 미치는 것으로 나타났다. 둘째, 이러한 관계몰입은 매장에서의 오락적 체험, 교육적 체험, 현실도피 체험, 미적 체험에 부분적으로 유의한 영향을 미치는 것으로 나타났다. 셋째, 브랜드 팬쉽 수준이 높은 고객일수록 관계몰입이 미적 및 일탈적 체험에 미치는 영향이 더욱 증가하였다. 본 연구의 결과는 고객의 브랜드 체험과 관련하여 고객의 참여와 관계몰입이 미치는 영향을 이해하는데 도움을 주고 체험 마케팅에 시사점을 제공할 것으로 기대한다.

• Smart Structures and Systems
• /
• 제22권6호
• /
• pp.727-741
• /
• 2018

To mitigate vibrations, tuned mass dampers(TMD) are widely used for long span bridges or high-rise buildings. Due to some durability concerns, such as fluid degradation, oil leakage, etc., the alternative solutions, such as the non-contacted eddy current damping (ECD), are proposed for mechanical devices in small scales. In the present study, a new eddy current damping TMD (ECD-TMD) is proposed and developed for large scale civil infrastructure applications. Starting from parametric study on finite element analysis of the ECD-TMD, the new design is enhanced via using the permanent magnets to eliminate the power need and a combination of a copper plate and a steel plate to improve the energy dissipation efficiency. Additional special design includes installation of two permanent magnets at the same side above the copper plate to easily adjust the gap as well as the damping. In a case study, the proposed ECD-TMD is demonstrated in the application of a steel arch bridge to mitigate the wind-induced vibrations of the flexible hangers. After a brief introduction of the configuration and the installation process for the damper, the mitigation effects are measured for the ambient vibration and forced vibration scenarios. The results show that the damping ratios increase to 3% for the weak axis after the installation of the ECD-TMDs and the maximum vibration amplitudes can be reduced by 60%.