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Chiang I.R.,Fordham University | Jhang-Li J.-H.,Hsing Wu University
Journal of Management Information Systems | Year: 2014

The infrastructure of the Internet, by and large, is maintained by Internet service providers (ISPs) that cater to regional customers and by Internet backbone providers (IBPs) that serve large organizations and ISPs. Some IBPs have recently branched into content delivery network (CDN) services; separately, other ISPs have started offering on-demand video streaming to compete with pure-play content providers. These developments have intensified the competition in both content delivery and media-streaming markets. For the content delivery market, we study the competition equilibriums by analyzing factors such as market share, cost structure, service pricing, and subscriber preference. Our approach helps identify conditions under which a content provider should choose an IBP over the incumbent CDN for content distribution. We also show how an IBP's CDN venture affects its interconnection relationship with ISPs. For the streaming service market, we examine conditions under which a content provider would partner with an ISP to lower operating and marketing costs while providing a more streamlined subscriber experience. Analytically, our game-theoretical models can optimize key contracting and pricing strategies for multiple classes of service providers; empirically, insights derived from the proposed models have anticipated events that coincide with several recent developments in content delivery and streaming service markets. Copyright © Taylor & Francis Group, LLC.

Lee P.-F.,Hsing Wu University
Proceedings - 10th International Conference Computer Graphics, Imaging, and Visualization, CGIV 2013 | Year: 2013

3D animations have been widely used in the movie and gaming industries. However, the huge storage requirements of dynamic mesh data make it difficult for a number of applications such as rendering, transmitting over a network, etc. This study proposes a multiresolution representation for 3D animation. The results show that the coarse animation appears by using only 10% of the original faces. More detailed animation appears by using 80% of original faces, but only requires 3% of original storage space. Consequently, this approach enables a continuous level of detail for dynamic 3D mesh sequences. © 2013 IEEE.

Chiang I.R.,Fordham University | Jhang-Li J.-H.,Hsing Wu University
WITS 2013 - 23rd Workshop on Information Technology and Systems: Leveraging Big Data Analytics for Societal Benefits | Year: 2013

The recent growth of online media streaming has created lofty valuations for streaming providers and intensified competition among online providers and cable channels. We analyze two strategic initiatives that are potentially game-changing. The first initiative, dubbed windowing, is to create a "temporal exclusivity" by making titles available for streaming months or years ahead of current industry practice. The second initiative, also aims to grow the subscriber base, is to create/fund "content exclusivity" by producing original titles and series. We use a three-stage game to show how cable operator and streaming provider can set their subscription fees, how content owner can set the royalty fees for the cable operator, and how content owner can determine the timeframe and payment when creating an exclusive streaming window. © Thirty Fourth International Conference on Information Systems, Milan 2013.

Chiang I.R.,Fordham University | Jhang-Li J.-H.,Hsing Wu University
22nd Workshop on Information Technologies and Systems, WITS 2012 | Year: 2012

The modern-day Internet is managed by two classes of providers: internet service providers (ISPs) catering to retail customers; and internet backbone providers (IBPs) serving large organizations and ISPs on long-haul routes. IBPs, facing excessive capacity and pricing pressure, have started offering content delivery network (CDN) services for content providers. We model the market competition on the CDN services as sequential games, and the aim is to study the game equilibriums by considering factors such as market share, cost structure, product pricing, and consumer preference. We prescribe conditions under which the content provider should choose an IBP over a traditional CDN operator; we also show how the IBP's venture into CDN could affect its interconnection relationship with downstream ISPs.

Lin J.-W.,Chien Hsin University | Lai Y.-C.,National Taiwan University of Science and Technology | Szu Y.-C.,St. Johns University Taiwan | Lai C.-N.,Hsing Wu University | And 2 more authors.
Educational Technology and Society | Year: 2014

Solving well-structured problems often requires using considerable related concepts which are usually scattered and introduced throughout different learning units of a subject. In addition, poor learning of related concepts of preceding units may block the learning of subsequent units, and eventually leads to the inability to solve well-structured problems of a subject. Thus, this work proposes using across-unit diagnostic feedback, which can identify weak concepts not only within a unit but also in different units. Furthermore, the provided feedback can be used to recommend remedial learning paths for students, and inform the students the priority of the paths to understand which weak unit should be remedied first and which weak concepts within a unit should be remedied first. Students can refer to the instructions and use the provided corresponding remedial materials to conduct remedial learning in a systematic way. To discriminate the learning effect among various feedback types, this project will compare the proposed system, the Across-Unit Diagnostic Feedback System (AUDFS), with two other systems, the Single-Unit Diagnostic Feedback System (SUDFS) and the Traditional Feedback System (TFS). Experiment results show that the proposed system significantly enhanced learning achievement and the ability to solve well-structured problems for students. The mean student retention time of the proposed system is significantly higher than that of other systems, indicating that the proposed system enables sustained connection between students and the system. Additionally, positive correlations exist between student retention time of the proposed system and student post-test scores. Through a questionnaire and interviews, most students expressed positive attitudes to the proposed system. © International Forum of Educational Technology & Society (IFETS).

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