• KSII Transactions on Internet and Information Systems (TIIS)
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• 제10권12호
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• pp.5174-5190
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• 2016

Recent years have witnessed an explosive growth of mobile devices, mobile cloud computing services offered by these devices and the remote clouds behind them. In this paper, we noticed ultra-low latency service, as a type of mobile cloud computing service, requires extremely short delay constraints. Hence, such delay-sensitive applications should be satisfied with strong QoS guarantee. Existing solutions regarding this problem have poor performance in terms of throughput. In this paper, we propose an end-to-end bandwidth resource reservation via software defined scheduling inspired by the famous SDN framework. The main contribution of this paper is the end-to-end resource reservation and flow scheduling algorithm, which always gives priority to delay sensitive flows. Simulation results confirm the advantage of the proposed solution, which improves the average throughput of ultra-low latency flows.

• 한국콘텐츠학회:학술대회논문집
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• 한국콘텐츠학회 2004년도 춘계 종합학술대회 논문집
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• pp.503-512
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• 2004

The most important virtue that S&T information should possess is the promptness. In the era of global competition, it is very important to catch the technical trends and R&D policy of advanced countries in time. In this paper, we surveyed S&T trends information service in advanced and competing countries including USA, Japan, European countries, and china. Based on the survey result, we show that the "Overseas S&T Trends Information Service" provided by KISTI is dominant to those of other countries

• 경영정보학연구
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• 제18권1호
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• pp.105-124
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• 2016

본 연구에서는 사회적 영향과 클라우드 서비스의 시스템 품질이 유용성과 신뢰성에 영향을 미치고, 이는 다시 지속이용의도에 영향을 미친다는 것을 규명하였다. 그리고 집단주의 문화와 국가 정보 인프라가 조절효과가 있음을 규명하였다. 이러한 연구결과를 요약하면 다음과 같다. 첫째, 클라우드 서비스의 지속적 이용의도에 유용성과 용이성 그리고 신뢰성이 영향을 미치는 것으로 나타났다. 둘째, 한국은 사회적 영향과 시스템 품질이 클라우드 서비스의 신뢰성에 영향을 미치는 것으로 나타났지만, 중국은 시스템 품질만 유의한 것으로 나타났다. 셋째, 한국과 중국 모두 사회적 영향과 시스템 품질이 모두 클라우드 서비스의 유용성에 영향을 미치는 것으로 나타났다. 넷째, 집단주의 문화가 강할수록 사회적 영향이 신뢰성과 유용성에 미치는 영향이 높게 나타났다. 다섯째, 한국보다 중국에서 시스템 품질이 신뢰성에 미치는 영향이 높게 나타났다. 본 연구의 결과가 제시하는 시사점을 다음 세 가지 측면에서 살펴볼 수 있다. 첫째, 본 연구에서는 TAM 모형이 클라우드 서비스 시장에서도 적용되고 있음을 보여주었다. 둘째, 현재 우리나라에서만 제한적으로 서비스하고 있는 한국 클라우드 업체들이 중국 시장과 같은 큰 시장으로 진출하기 위해서는 사회적 영향과 시스템 품질을 향상시킬 필요가 있다는 것을 보여주었다. 셋째, 집단주의와 같은 국가문화와 국가 정보 인프라를 고려한 해외진출 전략을 수립할 필요가 있다.

• 통상정보연구
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• 제15권3호
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• pp.387-409
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• 2013

본 논문은 중국의 제3자 물류산업의 현황 및 문제점들을 체계적으로 분석하여 중국의 제3자 물류산업의 서비스 수준이 비교적 낮고, 화주의 만족도도 낮으므로 협력관계가 향상되어야 한다는 결론을 내렸다. 다음으로 국내외 많은 선행연구들을 바탕으로 제3자 물류서비스 기업과 화주기업과의 파트너쉽에 관련된 연구 성과들을 종합적으로 서술하였을 뿐만 아니라 기존 연구의 한계점에 대해서도 분석하였다. 또한 물류서비스 성과의 평가모형을 토대로 상호파트너쉽, 운영, 경영성과를 기초로 한 제3자 물류서비스 성과 평가모형을 구축하였고 파트너쉽을 측정함에 있어서의 파트너쉽 평가모형을 결합시켰다. 이를 통해 물류파트너쉽 성과의 실제모형에 관한 쌍방의 파트너쉽 실현과 관계친밀도가 향후 협력에 중요한 영향을 미친다는 것을 밝혀내고 3PL 파트너쉽 실현, 관계친밀도를 3차원으로 평가하는 물류성과 파트너쉽 모형을 설정하였다. 그리고 종합물류서비스 성과와 파트너쉽 평가모형과 고객만족도를 함께 결부시켜, 물류파트너쉽 이론적 모형을 확정하였다. 마지막으로 제3자 물류파트너쉽에 관한 설문조사 데이터를 수집하여 실증분석을 실시하였다.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2004년도 춘계학술대회 논문집
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• pp.494-500
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• 2004

The purpose of this thesis is to know and understand the user requirements to provide with intelligent railway information service in response to the Ubiquitous environment. The railroad specially has a disadvantage of door-to-door service, however by using the information and communication techniques, we can provide the passengers who are using the intermodal transportation means with the realtime information, therefore we can overcome the above disadvantage. To deduce the passenger's needs for providing the future-type railway information service, we introduce the results of the questionnaire. In chapter 2, we studies on the concepts of intelligent railway information service, and in chapter 3, we investigate the cases of Japan and China, and in chapter 4, we study the passager's satisfaction by the questionnaire concerning the railway information service and suggest the needs for information offering.

• ETRI Journal
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• 제29권2호
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• pp.201-211
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• 2007

This paper focuses on the scheduling problem with the objective of maximizing system throughput, while guaranteeing long-term quality of service (QoS) constraints for non-realtime data users and short-term QoS constraints for realtime multimedia users in multiclass service high-speed uplink packet access (HSUPA) systems. After studying the feasible rate region for multiclass service HSUPA systems, we formulate this scheduling problem and propose a multi-constraints HSUPA opportunistic scheduling (MHOS) algorithm to solve this problem. The MHOS algorithm selects the optimal subset of users for transmission at each time slot to maximize system throughput, while guaranteeing the different constraints. The selection is made according to channel condition, feasible rate region, and user weights, which are adjusted by stochastic approximation algorithms to guarantee the different QoS constraints at different time scales. Simulation results show that the proposed MHOS algorithm guarantees QoS constraints, and achieves high system throughput.

• Journal of Information Processing Systems
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• 제7권2호
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• pp.261-270
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• 2011

The IEEE 802.16 standard is supposed to provide a wide-range broadband wireless service, but it leaves the implementation of the wireless resource scheduler as an open issue. We have studied the scheduling problem and propose a two level scheduling (TLS) scheme with support for quality of service and fairness guarantees for downlink traffic in a WiMAX network. A central controller Base Station has a number of users, and each mobile subscriber station has different channel conditions. The same mobile subscriber station may have different service requirements at different times in the WiMAX network. Based on OPNET simulation, the results show our scheduling algorithm can increase the network throughput, maintain relative fairness, and lower delay over the round robin and weighted round robin algorithms.

• 의료ㆍ복지 건축 : 한국의료복지건축학회 논문집
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• 제23권1호
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• pp.37-46
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• 2017

Purpose: There is little information about China's medical service system and health care facilities in Korean medical architecture papers, which is inconvenient for scholars engaged in medical building research and comparison. Futhermore, the transformation of the notion of health and the ascension of the service needs show the lack of medical function, and then make functions of hospital construction are always in the state of dynamic renewal. Therefore, the purpose of this study is to analyze the Chinese medical service system and general hospital related laws and regulations for future research to provide effective analysis of data, and find shortcomings. Methods: This study was conducted by a research on law and regulation of China's medical service system and general Hospital. Results: At present hospital construction in China is in the period of rapid development and it exposes the layout of medical health facilities is not reasonable and the service does not reach the designated position and so on. Overall, it requires more detailed guidelines to enhance the quality of medical health services. Implications: It is expected that the research of this paper will provide effective reference for future research on Chinese medical architecture system and medical facilities, and can promote and perfect the construction of Chinese medical architecture theory system.

• 한국정보시스템학회지:정보시스템연구
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• 제29권3호
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• pp.77-101
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• 2020

Purpose Internet only bank is one of the promising untact businesses which are rising in COVID-19 pandemic. Kakaobank and Kbank have been offering banking services since 2017 in Korea and WeBank and MYbank in China opened the services since 2015. It is necessary to examining determinants of customer loyalty beyond intention to use. The purpose of the present study is to analyze factors influencing customer loyalty and their determinants. A research model integrating the relationships among customer loyalty, service satisfaction, trust, and social influence, and their determinants was proposed. Design/methodology/approach Structural equation modelling for validating the research model was employed. 235 valid data were collected from users of Internet only bank in China. Nine latent variables grouped from 38 indicators were reliable and valid and nine hypotheses were tested by using SmartPLS. Findings All nine hypotheses were supported at significant levels of 0.001 and 0.01. Trust, service satisfaction, and social influence had influenced on customer loyalty. Trust not only affected customer loyalty directly, but also had influence on it indirectly through service satisfaction. Empathy and convenience are determinants of trust. Perceived expertise and dispositions believing acquaints had a positive influence on social influence, whereas users' anxiety for technology or change had a negative influence on social influence. Implications for academics and practitioners were suggested.

• 정보학연구
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• 제12권2호
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• pp.1-12
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• 2009

China first started its mobile phone services in 1987, and the number of users has exponentially increased so that it reached 700 millions in January 2009. Currently China's 2G(GSM) users is 650 millions. These 2G (GSM) services have an advantage of the capability to use the mobile phone with a SIM (Subscriber Identity Modul) card, one kind of smart cards, inserted into it. However, due to the security vulnerability of SIM cards being used within China's 2G (GSM) services, SIM cards cloning. Problems concerning mobile phone surveillance towards a designated person by illegal cloning ESN and IMSI have recently risen to be a massive social issue within Korea as well. These studies have experimented the possibility of SIM cards clone in various mobile communication corporations using 2G (GSM) in China, and hence discovered the security vulnerability such as the incoming outgoing, SMS service and additional services on mobile phones using clone SIM cards.