Seunghyun Yoon

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As the Internet evolves quickly from a best-effort network to a critical communications infrastructure that requires a higher level of controllability and guarantee of service quality, and the delivery of such communications services becomes even more competitive, large-scale NSPs or ISPs have to focus more on the performance and efficient resource(More)
End-to-End (E2E) flow monitoring is useful for observing performance of networks such as throughput, loss rate, and jitter. Typically, E2E flow monitoring is carried out at end hosts with known tools such as iperf. However, in a large-scale network, the end-host approach for performance measurement may not be easily deployed because of expensive costs and(More)
With the advent of cloud and virtualization technologies and the integration of various computer communication technologies, today’s computing environments can provide virtualized high quality services. The network traffic has also continuously increased with remarkable growth. Software defined networking/network function virtualization (SDN/NFV) enhancing(More)
This study investigates factors that may determine satisfaction in customer service operations. We utilized more than 170,000 online chat sessions between customers and agents to identify characteristics of chat sessions that incurred dissatisfying experience. Quantitative data analysis suggests that sentiments or moods conveyed in online conversation are(More)
The development of Information-Centric Networking (ICN) concepts is one of the significant results of different international Future Internet research activities. In the approaches, the networking paradigm shifts from the host-to-host communication to the information-based communication. The ICN concept is receiving huge attention because of the increasing(More)
In times of disaster acquiring aerial images is challenging. Runways may be crippled thus denying conventional aircraft in the area from taking off. Also the time required to schedule a satellite fly-by may delay first response efforts. Man backpackable aerial robots can be carried close to the disaster site and flown to capture aerial images. This paper(More)
As the Internet is quickly evolving from best-effort networks to a very critical communications infrastructure that requires higher quality Internet services and the delivery of such communications services become competitive, large-scale NSPs or ISPs have to concern much more on the performance and efficient resource usages of their networks. This(More)
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