Скачать презентацию ty A Tool for Collaborative Research James Miller Скачать презентацию ty A Tool for Collaborative Research James Miller

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ty A Tool for Collaborative Research James Miller UC Berkeley School of Information May ty A Tool for Collaborative Research James Miller UC Berkeley School of Information May 2009

What is Slants? • “Standardsland Tagging Service” – A research tool – Focused on What is Slants? • “Standardsland Tagging Service” – A research tool – Focused on a specific domain: Public policy and ICT standards – But any domain is possible • Requests Delicious RSS feeds from many users • Harvests bookmarks and tags • Organizes them for retrieval

About Delicious • A social bookmarking website • Easy tagging as you browse • About Delicious • A social bookmarking website • Easy tagging as you browse • Share bookmarks with others

About Delicious About Delicious

About Delicious About Delicious

How Slants Uses Delicious How Slants Uses Delicious

How Slants Uses Delicious How Slants Uses Delicious

The Problem That Slants Addresses • Technical standards have public policy consequences 1: – The Problem That Slants Addresses • Technical standards have public policy consequences 1: – Identity – User/content discrimination – Content censorship and control – User consent, etc • Often unaddressed in standards • Best to find out early in the standards process 1 Morris, J, A. Davidson. "Public Policy Considerations for Internet Design Decisions, " Center for Democracy and Technology, 2003.

More Easily Said Than Done • There are now more than 400 ICT standards More Easily Said Than Done • There are now more than 400 ICT standards consortia active globally • Thousands of standards • Consumer and watchdog groups are unlikely to be represented • Therefore, specifications may not take due account of their needs

Semantic Gap Semantic Gap

Semantic Gap: IPv 6 (RFC-2464) “Under IPv 4, the predecessor to IPv 6, Internet Semantic Gap: IPv 6 (RFC-2464) “Under IPv 4, the predecessor to IPv 6, Internet addressing allowed a reasonable amount of privacy and anonymity, because a numeric address was typically not tied to any particular machine or user. With IPv 6, however, the standard provided that in many cases a user’s address would be derived from the unique MAC (Medium Access Control) address embedded in the user’s Ethernet network card. ” 2 2 Davidson, Alan, John Morris, Rob Courtney. “Strangers in a Strange Land: Public Interest Advocacy and Internet Standards. : Washington, D. C. : Center for Democracy and Technology, 2002.

Focus on Identity • • • Information privacy Information security Authentication Access Online tracking Focus on Identity • • • Information privacy Information security Authentication Access Online tracking Datamining Profiling Third-party use Anonymous speech Etc.

The Slants Approach • Recruit or select Delicious users interested in ICT/public policy issues The Slants Approach • Recruit or select Delicious users interested in ICT/public policy issues • Harvest their Delicious bookmarks, based on their tagging • Harvest other bookmarks from the wider Delicious network • Aggregate and organize the bookmarks on the Slants website

Tag Harvesting • Slants requests bookmarks from Delicious – For specific users – For Tag Harvesting • Slants requests bookmarks from Delicious – For specific users – For specific resources – With specific sets of tags • Delicious returns an RSS feed of bookmarks

Tag Harvesting • An automated process • Search terms are based on thesaurus relationships: Tag Harvesting • An automated process • Search terms are based on thesaurus relationships: – BT/NT : identity + authentication + Open. ID – SA: RFID_tags + vicinity_cards – UF: surveillance + eavesdropping – RT: key_generation + key_distribution – Expansive: smart card OR chip card

Expansive Searches GSM one smartph …or… Find bookmarks tagged: …or… e cellphone smart cell_phone Expansive Searches GSM one smartph …or… Find bookmarks tagged: …or… e cellphone smart cell_phone CDMA e i. Phon id ndro a mobile + surveillance eavesdropping locatio n_trac king interc e track trac eavesdrop king monitor cove rt mon Intercep itorin tion g pt

Normalized Results one smartph e cellphone smart cell_phone Organize tags under: GSM CDMA e Normalized Results one smartph e cellphone smart cell_phone Organize tags under: GSM CDMA e i. Phon id ndro a mobile + surveillance eavesdropping locatio n_trac king track trac interc eavesdrop king ept monitor cove rt mon Intercep itorin tion g

Processing Bookmarks • Database stores individual bookmarks • Bookmark tags are checked against thesaurus Processing Bookmarks • Database stores individual bookmarks • Bookmark tags are checked against thesaurus – Matching tags are normalized against the controlled vocabulary; e. g. , eavesdropping becomes surveillance – Nonmatching tags are discarded:

Accessing Bookmarks • Tags are organized to create an index according to rules in Accessing Bookmarks • Tags are organized to create an index according to rules in thesaurus • Index is refreshed whenever new bookmarks are harvested • The index allows users to sort bookmarks by topic

Why Use Slants? • Leverages the researching skills of many users in a single Why Use Slants? • Leverages the researching skills of many users in a single area of interest • Automatically searches the entire Delicious network (over 5 million users) • Normalizes disparate tagging into a consistent system • Organizes bookmarks by topic

Low Cognitive Cost • No extra work involved, just tagging as usual • Gathers Low Cognitive Cost • No extra work involved, just tagging as usual • Gathers domain-relevant resources in one place • Provides easy browsing and finding

Additional Features • Identifies Delicious users that have the same interest • Scores resources Additional Features • Identifies Delicious users that have the same interest • Scores resources by times bookmarked • Enables users to create custom searches

Future Work • Term recommender system • Thesaurus building tool Future Work • Term recommender system • Thesaurus building tool

Summary • A collaborative research tool • Leverages social bookmarking that users would do Summary • A collaborative research tool • Leverages social bookmarking that users would do anyway • Performs expansive searches • Normalizes search results for easy retrieval • Built for the public policy domain but can be applied to any domain

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