www2013四日目

www2013四日目

相変わらず意味のないメモ．

KeyNote

Computing with Brain Circuits

BMI

猿がロボットを動かす？

BrainToBrain Interface

Panel: “Net neutrality and Internet freedom”

Tim Berners-Lee, Professor at the Massachusetts Institute of Technology (USA), Director of the World Wide Web Foundation and President of the UK’s Open Data Institute

Dep. Alessandro Molon, Brazilian Congressman, Leading the Bill on Internet Regulatory Framework

PrivacyとFreedomの問題

ポルトガル語でよく分からん

DRMはEvilか？

HTMLがFreeなのとすべてがFereなのとは異なる

OSN Analysis and Characterization

Wisdom in the Social Crowd: an Analysis of Quora

Asking questions on the internet

  Google, Wikipedia, Online Q&A Service

Quora: Social Q&A

Analyze 3 Graphs

User, Topics, Questoin

- Iser tp@oc gra@j

- Social Graph

- Related question graph

More answer, high quality answer => more follower

Social Ties affect answer? => No

Impact of question degree

User attention on similar questoin

Do user pay attention to similar question?

 

Modeling/Predicting the Evolution of User Activity Graphs on OSN-based Applications

Studying user activity

Friendship graph: static & symmetric ... but user activity is dynamic & asymmetric

=> evolution of activity graph

Emprical characterization of user interactoins

- A dynamic graph evolution model

Node obehavior characteristics

- Active

- Alive

- Quit

Active Rate

- increases time by time

Expansion Cost

- Active nodes/ new nodes

- 活性化するにはどのくらいのノードが必要なのか

- Explain how application die out

Life-Span Distribution

Active user number prediction

- parameter estimation based on 20 weeks

- Active user number prediction for the following weeks

Google+ or Google-? Dissecting the Evolution of the New OSN in its First Year

新しいOnlineSocialNetworkは顧客を獲得できるのか？

G+はこの疑問に答える対象となる

G+="Ghost Town?"

Measurement Methodology & Data Set

めっちゃクロールしてデータを集めた

LCC in G+ => 43.5 => small...

LCC=Largest Connected Component

ActiveUsers=>Steadly increasing.

Campaign 意味がある

- 10% of users post 80% of post

- 1% of users comment 90%

power-low friend distribution

G+ growing rapidly

LCC active users steadily grow

=> Growing!!

Potential Networks, Contagious Communities, and Understanding Social Network Structure

Network properties

- Degree Distribution

- Shrinking diameter and edge densification

- Network Community Profile

Contagious Networks

- network spread via existing social ties

Model of Community growth

- 論文をチェック

Graph Analysis and Primitives

Subgraph Frequencies: Mapping the Empirical and Extremal Geography of Large Graph Collections

subgraph frequencies = mot-if?

Estimating Clustering Coefficients and Size of Social Networks via Random Walk

- Global Clustering Coefficient

- Network average CC

- Number of registered user

Global CC Algorithm

C_g = Φ/Ψ

Ψ=Average Degree-1

Φ=聞き逃した・・・

Evaluatoin:あまり精度が良くない・・・

う～ん？思ったより面白くなかった

こんなんでwww通るものなの？

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と言ったところで終了して皆で飲みに．

シュラスコの店に行ったけど，笑いすぎ+食べ過ぎて腹が痛い．

ブラジル面白い．

もう一度来るかどうかは微妙だけどw