http://www.bpiwowar.net/ 2009-12-15T17:25:29+01:00 http://www.bpiwowar.net/ http://www.bpiwowar.net/lib/images/favicon.ico text/html 2009-12-14T12:32:29+01:00 Benjamin Piwowarski http://www.bpiwowar.net/research/renaissance This page focus is the European project about applying Quantum Mechanics to Information Retrieval. Please see the page Structured Information Retrieval and Machine Learning for more information about my work on assessment, metrics and structured information retrieval with machine learning techniques. text/html 2009-09-25T12:37:12+01:00 Benjamin Piwowarski http://www.bpiwowar.net/links/mg4j-notes Here are some questions I had on MJ4G and the answers Sebastiano Vigna (the developper of MG4J) gave me, plus some notes I made while developping with MJ4G. Too many open files The index file is opened once for each term you want an iterator on. You can load the index in memory in order to avoid such a problem or raise the number of files the system can open. text/html 2009-09-25T12:32:05+01:00 Benjamin Piwowarski http://www.bpiwowar.net/links/api - Managing gigabytes for java (MG4J) is a very efficient java library for IR - from building indices to retrieval. Here are some notes on its use. text/html 2009-09-16T08:53:00+01:00 Benjamin Piwowarski http://www.bpiwowar.net/anniv text/html 2009-08-18T14:21:15+01:00 Benjamin Piwowarski http://www.bpiwowar.net/research/metrics This XML retrieval paradigm implies to change the way systems are evaluated. In INEX (see below), a new assessment scale has been proposed along with new precision/recall metrics (the Norbert Gövert PRng metric for instance). I proposed a several metrics, the latest being the most expressive (generalisation of precision-recall) and simple to compute . text/html 2009-07-10T16:27:37+01:00 Benjamin Piwowarski http://www.bpiwowar.net/research I am currently working (mainly) on the following themes * Quantum Mechanics and (Structured) Information Retrieval My former research fields * Query Log Mining * User modelisation * XML and XQuery * Implementation of XQuery with the Proximal Nodes model text/html 2009-07-01T12:18:45+01:00 Benjamin Piwowarski http://www.bpiwowar.net/links/conferences * Conferences in IR 2010 * iiIX 2010 (Information Interaction in context]] text/html 2009-07-01T12:16:07+01:00 Benjamin Piwowarski http://www.bpiwowar.net/links Other links * List of software I use * List of java APIs useful for research * Link to conferences Nice search engines * searchme A search engines using the “stack” interface Glasgow * Glasgow Film Theatre (GFT), Grovenor cinema * Brel bar-restaurant Òran Mór * Museums of Glasgow * Tango in Glasgow text/html 2009-05-11T14:28:01+01:00 Benjamin Piwowarski http://www.bpiwowar.net/start [English CV] My research now focus on developing formal models for (Structured) Information Retrieval (IR) inspired by the Quantum Mechanic formalism. I am also interested in IR evaluation, machine learning for IR, interactive IR, and XML databases. For more information, check my research page. text/html 2009-05-11T14:27:25+01:00 Benjamin Piwowarski http://www.bpiwowar.net/research/query_log_mining We worked with Georges Dupret on a model that is able to distinguish the attractiveness (how likely a user is going to click on it) of paper and the position effect (how likely is it that the user will even consider this document, i.e. look at the snippet). This work is described in a SIGIR paper .