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ReSearch - Searching for Researchers

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Information about ReSearch - Searching for Researchers

Published on June 13, 2008

Author: mala

Source: slideshare.net

Description

... because research without search is just "re".
A talk teaching the basics of searching, made for the PhD students of the Department of Electronics and Information at Politecnico di Milano
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ReSearch (because research without search is just “re”) Davide Eynard eynard@elet.polimi.it

2 Table of contents  Introduction  ... (ellipsis left by purpose)  Conclusions Davide Eynard ReSearch - 2008/06/06

3 This seminar is not... “Le risorse elettroniche per la ricerca”  a transversal course for the PhD Students of Politecnico di Milano  This (June 2008?) will be the fourth edition  Very good material from previous editions is available at http://www.biblio.polimi.it/documenti  Main topics: • query languages • online libraries, journals and ebooks • tools to create and manage your bibliography • search engines, deep Web, open archives, advanced browsing • social publishing (blogs and RSS) and social bookmarking • POLIsearch • using the university proxy to access online resources • notes on copyright issues • search techniques (like PICO and SPICE) Davide Eynard ReSearch - 2008/06/06

4 So... why? Searching (and now, in particular, being able to effectively search on the Internet) is very important for our research and, more generally, in our lives. Even if they are interested, some students skip the course as it does not give enough credits! If you're interested in these topics, ask for a solution (ie. increase the credits, together with the teaching material). Davide Eynard ReSearch - 2008/06/06

5 So... what? What is the real purpose of this lecture, then? What are the contents? Is this a short version of the PhD course? Davide Eynard ReSearch - 2008/06/06

6 So... what? What is the real purpose of this lecture, then? What are the contents? Is this a short version of the PhD course? NAH! There's so much material about search that we could prepare ten complementary PhD courses... Davide Eynard ReSearch - 2008/06/06

7 So... what? What is the real purpose of this lecture, then? What are the contents? Is this a short version of the PhD course? NAH! There's so much material about search that we could prepare ten complementary PhD courses... Moreover, I already had some material I wanted to recycle  http://searchlores.org – a precious source for seekers  PowerBrowsing – an old project of mine Davide Eynard ReSearch - 2008/06/06

8 So... what? What is the real purpose of this lecture, then? What are the contents? Is this a short version of the PhD course? NAH! There's so much material about search that we could prepare ten complementary PhD courses... Moreover, I already had some material I wanted to recycle  http://searchlores.org – a precious source for seekers  PowerBrowsing – an old project of mine BUT I also have something new to tell you, I promise! Davide Eynard ReSearch - 2008/06/06

9 The Web  Search engines cover (at best) ¼ of the web  Different SE may return different results (as they overlap)  Quality of results in terms of precision and recall  See (for instance) here [http://www.searchlores.org] Davide Eynard ReSearch - 2008/06/06

10 The Internet The Web              vs               Not the Web IRC Email Blogs Usenet IM Wikis Forums File sharing Emule Bittorrent Folksonomies P2P ... ... Davide Eynard ReSearch - 2008/06/06

11 Search engines How are search engines used?  Mostly queries with one or few words • (which ones? Give a look at zeitgeist!)  Mostly you look just at the first hits • (check here and here) Main operators are available instead...  quotes  allinanchor  inurl  filetype  intitle  related  ... and of course boolean ones Davide Eynard ReSearch - 2008/06/06

12 True or false? How true is boolean search?  (that is, how truly boolean...)  “I want this term or this other and not that one” is fine...  ... but don't try to think in sets! semantic AND web semantic AND semantic web semantic semantic ... but it doesn't work like this! Davide Eynard ReSearch - 2008/06/06

13 Vector Space Model In the VSM, documents are represented as vectors in a multidimensional Euclidean space The coordinate of document d in axis t is given by dt = TF(d,t) * IDF(t) Davide Eynard ReSearch - 2008/06/06

14 The epanaleptical approach Some search engines are based on models that are much more similar to the VSM than to sets+boolean. Epanaleptical approach:  just repeat the word many times  if it's more that one word, surround them with quotes Examples (nice academic drawbacks):  semantic web  semantic web + collaborative systems  slam  performance evaluation Davide Eynard ReSearch - 2008/06/06

15 To google or not to google Use google to find anything  “local” searches can be run from google too  try it with blogs, forums, wikis etc • phpbb trick • mediawiki trick Use alternative search engines  search for related:www.google.com Davide Eynard ReSearch - 2008/06/06

16 Search techniques  Word search (+ suffixes)  Webbits (here and here) • (and the “index of” trick)  Concept related search and specific search engines  Arrows: using communities of practice to enhance search • What are diy, gtd, seo, slam, etc.?  Foster serendipity • check upper dirs • follow links • look at the status bar Davide Eynard ReSearch - 2008/06/06

17 Exploit collaboration Blogs/News  Ok, I suppose you all know about RSS feeds... • You can recognize them • You can mash them up • You can use them for other media  ... but how can you find interesting ones? • AideRSS technique • ... and a tutorial that explains you how to use it Davide Eynard ReSearch - 2008/06/06

18 Exploit collaboration Folksonomies  del.icio.us  ma.gnolia Bibliography sharing  bibsonomy  CiteULike Social networks/groups  Ever searched for Facebook groups? Davide Eynard ReSearch - 2008/06/06

19 DIY AKA Do It Yourself  AKA means Also Known As • Also means... well, just jokin'! In this case it means use a personal, custom approach using ready made tools or creating new ones. How can you do it?  Know thy enemy • WWW, HTTP, HTML (see powerbrowsing) • Human patterns • PC patterns  Build models  Exploit tools or regularities in contents Davide Eynard ReSearch - 2008/06/06

20 Web Technologies There are some things you should know to make a well-behaving bot: • HTTP ◦ GET and POST ◦ Referer ◦ UserAgent ◦ Cookie ◦ Proxy • HTML ◦ Form ◦ Dynamically generated code Give a look at this tutorial. And to some DEI examples. Davide Eynard ReSearch - 2008/06/06

21 Tools and examples Web tools • Program Committee Searcher • Changedetection • Wayback machine • Mashup tools • SpeakinAbout Client tools • user agent switcher • spiders/scrapers • custom made tools ;-) • Firefox search plugins Davide Eynard ReSearch - 2008/06/06

22 To conclude: did you know...  that we have people working on very interesting stuff about searching, libraries and documents here (and, in the real world, about 100m from us?)  that here you can find all the info you need to set up the university proxy, so you can access restricted document libraries from anywhere?  that on the OPAC you can find recent doctoral theses ready to read, in pdf format?  ... and that you have a lot of polimi-related news here? Davide Eynard ReSearch - 2008/06/06

23 That's all, folks! Thank you! Questions? Davide Eynard ReSearch - 2008/06/06

24 Contact Davide Eynard Tel. 02 2399 4010 Fax 02 2399 3411 eynard@elet.polimi.it http://www.dei.polimi.it/people/eynard Back Davide Eynard ReSearch - 2008/06/06

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