1 / 18

COP 5725 ADVANCED DATABASE SYSTEM

COP 5725 ADVANCED DATABASE SYSTEM. Minimum-sized Positive Influential Node Set Selection for Social Networks: Considering Both Positive and Negative Influences. By: Manik Saini (ms13ad). Motivation . What is a Social Network? . Motivation . What is a social Network?

alina
Download Presentation

COP 5725 ADVANCED DATABASE SYSTEM

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. COP5725ADVANCEDDATABASESYSTEM Minimum-sized Positive Influential Node Set Selection for Social Networks: Considering Both Positive and Negative Influences. By: Manik Saini (ms13ad)

  2. Motivation • What is a Social Network?

  3. Motivation • What is a social Network? • Set of Nodes(which can be individuals and organizations) that share a common interest or purpose. • Represented as graph of relationships and interactions among a group of individuals.

  4. Background & Numbers[1] • 58 million tweets per day • Founded in 2004 • 1.31 billion users, 2014 [1] • May be the 2nd largest “country” • Around 5 billion pictures • 3000 pictures uploaded per minute

  5. Word of Mouth&Spread of Influence • Medium as a spread of Influence • Information, opinion, ideas • Crowd Sourcing : Some 2.3 million people are taking part in a crowdsourcing appeal to find missing Malaysian Airlines flight MH370 [2] • Word of Mouth • Can be used as a source of advertising/marketing products , brands etc.

  6. Example • Gambling insulators problem • Whom should I select? • Constraint : • Minimum nodes & Net effect positive • Find minimum-sized node (user) set in a social network that could positively influence on every node in the network

  7. Applications • Social intervention program • Like Quit Smoking, Quit Gambling . . . • Promote new products • (give sample products to chosen ones) • Advertising (Viral Marketing) • Social recommendation • Expert finding

  8. My Facebook Network

  9. Comparison David • v/s Kevin George Shamik Bose

  10. NetworkModel • A social network is represented as an undirected graph • Social influence represented by weights on the edges • Positive/Negative influence • Nodes start either active or inactive • An active node may trigger activation of neighboring nodes based on a pre-defined threshold θ

  11. MPINSProblem • Given • a social network • a threshold θ • Goal • The initially selected active node set denoted by I could positively influence every other node in the network no less than threshold θ • Objective • Minimize the size of I • NP-Hard Problem

  12. Terminology • Positive Influence • Negative Influence • Ultimate Influence • Contribution Function

  13. Approach • Two Phase approach: • Maximal Independent Set (M) • Greedy algorithm

  14. Example

  15. Performance • Simulation Settings • Generate random graph • The weighs on edges are randomly generated • Simulation Results • Very close to Optimal solution • No existing state of the art that’s finds MPINS • Comparison with PIDS (Positive Influential Dominating Set)

  16. SimulationResults – small scale

  17. SimulationResults – Large scale

  18. References • [1] http://www.statisticbrain.com/social-networking-statistics/ • [2] http://www.theguardian.com/world/2014/mar/14/tomnod-online-search-malaysian-airlines-flight-mh370 • [3] Maximizing the spread of influence through a social network, David Kempe, Jon Kleinberg, ÉvaTardos

More Related