icwsm12 brief review

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ICWSM2012 BRIEF REVIEW Akisato Kimura ( @_akisato )

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Briefly reviews International Conference on Weblogs and Social Media (ICWSM12) from my perspective.The latter part written in Japanese, sorry for that.

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Page 1: ICWSM12 Brief Review

ICWSM2012 BRIEF REVIEW Akisato Kimura ( @_akisato )

Page 2: ICWSM12 Brief Review

Conference venue

Trinity College Dublin, Ireland

Famous place : Old Library Actual venue : Bio. Med. Bld. (not in campus)

Page 3: ICWSM12 Brief Review

Reception venue

Guinness Storehouse, west Dublin

300-deg view, 7-th floor at west Dublin

Page 4: ICWSM12 Brief Review

What’s ICWSM?

International AAAI Conference on Weblogs and Social Media

Annual conference, 6th for this year.

Seems to be a conference on Twitter & other social media, few papers as to weblogs.

A lot of participants from companies and labs about SNS, mass media, ads, and marketing.

A major cluster = sociologists, a unique conference hosted by AAAI.

Page 5: ICWSM12 Brief Review

Symbolic panel discussions

I Want to (Net)work With You, But I Don't Know What/Where/Who You Are

Panelists from Cisco, IBM, LinkedIn & Datahug

News Generation and Consumption Through Social Media

Panelists from Storyful, Newswhip, Irish Times, C-SPAN & Guardian

Machine learning accounts for a small portion.

Page 6: ICWSM12 Brief Review

Basic statistics

Only single track

Not high quality as the rate indicates

Our presentation (can’t see any other JPN pres.)

Attendees: over 330 in advanced registration (x3 of papers), half of them from USA, only 5 from Japan.

Page 7: ICWSM12 Brief Review

General overview

Computer science << sociology

Data collecting, analyses & discussions > results > performance > technical novelty

Most oral presentations with high quality

Especially in terms of analysis and discussions.

Don’t mind theoretical soundness and novelty.

2 giants: Twitter & Facebook

But, we should not rely only on the giants.

The direction includes cross platform analysis.

Page 8: ICWSM12 Brief Review

Interesting events & efforts

Town hall meeting

Discussing future directions of the conference with all the participants, not only PC members.

Industrial panel

With powerful debaters from various industries

Dataset sharing service

Provides new datasets used by papers.

All datasets released as openly available community resources. http://icwsm.cs.mcgill.ca

Page 9: ICWSM12 Brief Review

Resources

All the papers presented in the main conference can be freely accessible from http://www.aaai.org/Library/ICWSM/icwsm12contents.php

All the workshop papers are also free : http://www.aaai.org/Library/Workshops/workshops-library.php

I gathered most tweets as to ICWSM 12, freely accessible from http://togetter.com/id/_akisato

Page 10: ICWSM12 Brief Review

Our presentation

Creating Stories : Social Curation of Twitter Messages

Curated lists = supervised corpora for analyzing microblog messages http://www.brl.ntt.co.jp/people/akisato/socialweb1.html

Page 11: ICWSM12 Brief Review

面白かった発表 1

The Livehoods Project: Utilizing Social Media to Understand the Dynamics of a City

Won the Best Paper Award

Twitterタイムラインから取れる 位置情報(tweets with geotags, 4sq etc.)から, かなり局所的な地域の特性の変化が掴める.

URL: http://livehoods.org Twitter ID: @livehoods

Page 12: ICWSM12 Brief Review

Livehoods project

http://livehoods.org/research

[解析のポイント] 人々の日々の行動パターンから 場所の特性を明らかにしよう!

[データ収集] 11M of 別研究のデータ, 7M from Twitter TL. 論文で使われているのは, 40K check-ins (4K人, 5K箇所)

[解析方法] 位置をnodeとするspectral clustering. 各nodeの素性構築が重要.

Page 13: ICWSM12 Brief Review

クラスタリングの方法

[素性のポイント] 各位置でBo”CheckIns”を計算, 人数と同数次元のベクトル.

[素性解析のポイント] Bo”CheckIns”の類似性を 2位置間の類似性と見なす. = 同一人物が同じくらい2位置にいれば,その2位置は仲間.

[クラスタリング] Spectral clustering. 物理的距離の遠い2位置は 無関係と見なすことにする.

Page 14: ICWSM12 Brief Review

で,結果は…

Webを見た方が早いと思います. http://livehoods.org/maps

Page 15: ICWSM12 Brief Review

面白かった発表 2

Modeling Spread of Disease from Social Interactions

Best paper award candidates

感染症がどのように拡散 していくか,を, Twitter(+位置情報)だけ から予測しよう.

Page 16: ICWSM12 Brief Review

何が,なぜできてなかったのか?

情報源は病院しかなかった. → Global aggregationsしか取れなかった. Google Flu Trends: http://www.google.org/flutrends/

CDC Statistics: http://www.cdc.gov/datastatistics/

国立感染研情報センタ: http://idsc.nih.go.jp/disease/influenza/

でも,本当に必要な情報は, いつ,どこで,誰が感染しているか?

だって,感染したくないし…

Page 17: ICWSM12 Brief Review

感染源は誰だ?

Twitterのfollow関係だけで感染する…

わけがない! (それは映画の世界…

同じ時間に同じ場所にいることが大事

位置情報と時刻の共起を軸に考える

Page 18: ICWSM12 Brief Review

感染したことを知るには?

[Uni, bi, tri]-gram(+多量の後処理)を素性とした 半教師付きSVM cascadeで識別.

(不)完全教師付 少量コーパス

教師なし大量コーパス

Self-training

Page 19: ICWSM12 Brief Review

結果

これもwebを見た方が早いと思います. http://health.scenedipity.com/pollution

Page 20: ICWSM12 Brief Review

面白かった発表 その他羅列1

Crossing Media Streams with Sentiment: Domain Adaptation in Blogs, Reviews and Twitter

Sentiment analysisをTwitterだけでやるの 無理だから,reviewやblogを教師に使う.

Exploring Social-Historical Ties on Location-Based Social Networks

Foursquareもの.トピックと位置,両方使う.

階層Pitman-Yor過程によるモデル化

Page 21: ICWSM12 Brief Review

面白かった発表 その他羅列2

The Emergence of Conventions in Online Social Networks

Won the Best Paper Award

Twitterにおける「文法」らしきものは,基本

的にボトムアップにできあがってきたもの.それを網羅的に検証.

Page 22: ICWSM12 Brief Review

おしまい