PhD meeting 27th of November / TBM faculty Delft University of Technology. Thieme Hennis Faculty of Systems Engineering, Policy Analysis and Management Delft University of Technology +31 15 278 73 71 (work) +31 6 51855 22 0 (mobile) IM/Skype username: thiemehennis

1. 

3. why?

4. Thiem! Laat je snor staan voor het kankerfonds! mmm… Goed idee Het is ook erg stoer! Wij doen het ook!

6. “How to make people (usually guys) grow a moustache every year in November? “

7. don’t worry, I am only trying to be funny

8. MOTIVATION but…

9. So… there we have it

12. reputation, trust

13. feedback, reciprocity, learning

15. Communities/networks (Twitter, LinkedIn, …)

17. PageRank relies on the uniquely democratic nature of the web by using its vast link structure as an indicator of an individual page's value. In essence, Google interprets a link from page A to page B as a vote, by page A, for page B. But, Google looks at more than the sheer volume of votes, or links a page receives; it also analyzes the page that casts the vote. Votes cast by pages that are themselves "important" weigh more heavily and help to make other pages important.

18. WikiTrust uses a content-driven reputation system: authors gain reputation when their contributions are preserved by subsequent authors, and they lose reputation when their contributions are reverted. The trust of a portion of text is computed according to the reputation of the author, and the reputation of the people who subsequently revised the portion of text, and the text immediately surrounding it. Thus, what WikiTrust calls "text trust" is an indication of the degree with which the text has been revised. …

20. Another dimension to reputation - not just value, according to others - but a contextualized value, assigned to 1. a concept or topic 2. a process or competency Photography (4) PHP (54) Ruby on Rails (40) 88 Dynamically updated! Project management (0.8) Social skills (0.4) Writing skills (0.3) Idea generation (0.3)

21. … but how?

22. action Knowledge (topic) What kind of contribution? What kind of topic? EX ANTE Competencies (process) What kind of action? Which competencies involved?

24. contextualize  categorize/tag/embedEX POSTERIORI  based on reactions

25. reputation use/rate/recommend/tag create profile/reputation: every value interaction contains one or more context parameters

26. . reference (quality & context)) . rating (quality) . tag (context) expertise profile write paper . review (quality & context) researcher I evaluate quality of review write review review competency Example: Academic literature… finding the right reviewer Academics write papers and do reviews A reviewer that has a good reputation can ask more money The reputation of a reviewer is based on - The quality of his own papers (expertise) - The quality of his reviews (review competency) - more… (recommendations?) The value of a paper is based on the review(s), references, and ratings The context of a paper is based on the review, keywords, journal keywords, and social tagging - Keywords of the paper itself - Keywords of the paper referring to the paper

27. action Knowledge (topic) Logistics, six sigma EX ANTE Competencies (process) Write a paper

29. contextualize  structured/ references/tagEX POSTERIORI  based on reactions

35. That can be difficult

36. Some feedback could be helpful

38. Assign label “Needs reflection”, “Needs case”, “Needs supervision/collaborators”, “Needs literature”

39. Others can react, give tips, link to interesting resources, suggest people, like, offer help, etc.

41. Possibly including references to literature

42. Leads to discussion, voting, and possibly solutions

44. Some things to take into account

45. Kollock motivation～ need  Need or necessity is central  Heterogeneity is important (different views, people)