Philosophiae Doctor - PhD / The underlying theme of this thesis is identification, classification, detection and prediction of cellular network faults using state of the art technologies, methods and algorithms.

personal branding, Facebook, Musician Stars, SNS (social network service), online

With the popularity of the Internet and the growing trend of Web2.0, interaction and knowledge exchanges among the Internet users become active. Facebook, currently the world's most successful social networking website of Web2.0, functions as a social entertainer and further develops as a marketing business platform. In particular, many enterprises and organizations focus on operating the function of Fan Page for the purpose of marketing strategy. The research will be conducted from the users' viewpoints and the examples of consumption on Facebook and entertaining Fan Pages will be provided to investigate the specialties and functions of the website, causing the users to organize and participate in the Fan Pages, and the behaviorial motives and the gratification obtained from the process. Substantial and virtual random samplings are utilized in conducting the questionnaire survey. The result shows the obvious difference in the motives of the Fan Page participants based on various levels of education. It also verifies the critical influence of media characteristics on the participation of Fan Page. And, it helps us realize that users with different motives obtain different satisfactions through the participation of Fan Page. In the end, the research investigation can be considered as a basis of enterprise marketing strategies theoretically and practically.

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京都大学 / 新制・課程博士 / 博士(情報学) / 甲第23550号 / 情博第780号 / 新制||情||133(附属図書館) / 京都大学大学院情報学研究科通信情報システム専攻 / (主査)教授 大木 英司, 教授 原田 博司, 教授 湊 真一 / 学位規則第4条第1項該当 / Doctor of Informatics / Kyoto University / DFAM

Computer networks are continuously evolving and growing in size and complexity. New technologies are being introduced which further increases the complexity. Net- work Service Orchestration is all about pushing configuration out into the network devices automatically without human intervention. There can be issues that causes the orchestration to fail. In many cases manual operations must be done to recover from the error which is very contradicting since the goal of orchestration is that it should be fully automated. There is some indication that the errors that are being solved manually could be de- tected and handled by a feedback mechanism. This thesis work aimed to build on current insight and if possible, verify that the feedback mechanism is a viable method. After consideration on different ways to solve the research question, the choice fell on creating a test environment where the approach was tested. The test environment was used to investigate if a network orchestration system could be integrated with a feedback mechanism. The result of this project presents a way to automatically de- tect a network failure and send feedback to a Network Service Orchestrator. The or- chestrator is then able to identify and correct the error. / Datornätverk utvecklas kontinuerligt och växer i storlek och komplexitet. Nyteknik införs som ytterligare ökar komplexiteten. Nätverksservice orkestrering handlar om att skicka ut konfiguration automatiskt till enheter i nätverket utan mänsklig in- blandning. Det kan finnas problem som gör att orkestreringen misslyckas. I många fall måste manuella åtgärder utföras för att lösa problemet, vilket är mycket motsä- gelsefullt, eftersom målet med orkestrering är att det ska vara fullt automatiserat. Det finns indikationer på att fel kan detekteras och hanteras av en återkopplings- mekanismen. Detta examensarbete syftar till att bygga på aktuell insikt, och om möj- ligt, verifiera att återkopplingsmekanismen är en möjlig metod. Efter överväganden på vilka olika sätt som projektmålet kunde uppnås föll valet på att skapa en testmiljö där ansatsen kunde testas. Testmiljön användes för att utreda om ett nätverksorkestreringssystem kan integreras med en återkopplings mekanism. Resultat av projektet presenterar ett sätt att automatiskt upptäcka ett nätverksfel och skicka återkoppling till ett nätverksorkestreringssystem. Nätverksorkestreraren kan sedan detektera och åtgärda felet.

<p> <p>&nbsp / </p> </p> <p align="left">The underlying theme of this thesis is identification, classification, detection and prediction of cellular network faults using state of the art technologies, methods and algorithms.</p>

<p> <p>&nbsp / </p> </p> <p align="left">The underlying theme of this thesis is identification, classification, detection and prediction of cellular network faults using state of the art technologies, methods and algorithms.</p>

Approved for public release; distribution in unlimited. / As a consequence of the developments in information technology and the Internet, the world is getting increasingly dependent upon distributed systems and network services. Unfortunately, the security of these services has not kept pace with the advances in information technology itself. Security practitioners accept that, a system that is connected to an unbounded network, e.g., the Internet, will be vulnerable to attacks regardless of its security features. However, the emerging discipline of survivability can help ensure that such systems deliver essential services and maintain essential properties, such as integrity, confidentiality and performance, despite the presence of intrusions. Although survivability has been accepted as a means of sufficiently addressing the security problems of current network services, unfortunately, the studies that have been done on network survivability so far are not mature enough and they lack quantifiable metrics. To address this lack of network survivability measure, a global connectivity metric is developed in this thesis. Additionally, an election protocol based on this metric is designed for the SAAM prototype to enhance the survivability of the SAAM server. / Lieutenant Junior Grade, Turkish Navy

The current Internet presents a high barrier to entry for new service providers, due to its inability to accommodate new protocols and technologies, and lack of competition among the network providers. Recently, network virtualization has gained considerable attention as a possible solution, as it enables multiple networks to concurrently run over a shared substrate. It allows for deploying diverse network protocols and technologies customized for specific networked services and applications. Moreover, any party can take on the role of a network provider by simply offering his virtual network infrastructure to customers, increasing competition in the market. However, the first challenge in realizing a fair and competitive market in a virtual network environment is to have a service negotiation and contracting mechanism in place, that will allow (i) multiple infrastructure providers to participate in a fair and faithful competition, and (ii) a service provider to negotiate the price and quality of service with the providers. In this thesis, we present V-Mart, an open market model and enabling framework for automated service negotiation and contracting in a virtual network environment. To the infrastructure providers, V-Mart fosters an open and fair competition realized by a two stage auction. The V-Mart auction model ensures that bidders (infrastructure providers) bid truthfully, have the flexibility to apply diverse pricing policies, and still gain profit from hosting customers’ virtual resources. To the service providers, V-Mart offers virtual network partitioning algorithms that allow them to divide their virtual networks among competing infrastructure providers while minimizing the total cost. V-Mart offers two types of algorithms to suit different market scenarios. The algorithms not only consider virtual resource hosting price but also the service provider’s preference for resource co-location and the high cost of inter-provider communication. Through extensive simulation experiments we show the efficiency and effectiveness of the algorithms under various market conditions.