Archive for year 2011

Research on Twitter

Preprint of my WSDM paper, ‘Adding Semantics to Microblog Posts’ available now

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5 months ago
by in

The camera-ready ver­sion of my WSDM paper, Adding Seman­tics to Microblog Posts (with Wouter Weerkamp and Maarten de Rijke) can be found here. I will release the asso­ci­ated data files (such as the man­ual anno­ta­tions) soon, stay tuned.

Plot of a query-specific burst

Adaptive Temporal Query Modeling

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5 months ago
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We present an approach to query mod­el­ing that uses the tem­po­ral dis­tri­b­u­tion of doc­u­ments in an ini­tially retrieved set of doc­u­ments. Such dis­tri­b­u­tions tend to exhibit bursts, espe­cially in news related doc­u­ment col­lec­tions. We hypoth­e­size that doc­u­ments in those bursts are more likely to be rel­e­vant than oth­ers. Pred­i­cated on More >

social media icons

A Framework for Unsupervised Spam Detection in Social Networking Sites

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5 months ago
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Social net­work­ing sites offer users the option to sub­mit user spam reports for a given mes­sage, indi­cat­ing this mes­sage is inap­pro­pri­ate. In this paper we present a frame­work that uses these user spam reports for spam detec­tion. The frame­work is based on the HITS web link analy­sis frame­work and More >

onszelf voorbij

Wij-woorden op websites: Zoekmachines voor geesteswetenschappers

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8 months ago
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Vol­gens velen in onze samen­lev­ing zijn we onszelf in het pro­ces van inte­gratie en multi-culti finaal voor­bi­jgelopen. Sinds tien jaar is de toon van het debat in de media en op inter­net vol­sla­gen veran­derd. De regering verkondigt dat de mul­ti­cul­turele samen­lev­ing is mis­lukt en dus wordt afgeschaft. Etnis­che achter­stands­groepen moeten More >

Screenshot of the analysis webtool

Women’s views on consent, counseling and confidentiality in Pmtct: a mixed-methods study in four African countries

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10 months ago
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Accepted sub­ject to revisions.

Ambi­tious UN goals to reduce the mother-to-child trans­mis­sion of HIV have not been met in much of Sub-Saharan Africa. This paper focuses on the qual­ity of infor­ma­tion pro­vi­sion and coun­sel­ing and dis­clo­sure pat­terns in Burk­ina Faso, Kenya, Malawi and Uganda to iden­tify how ser­vices More >

hits per time of day

People searching for people: analysis of a people search engine log

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10 months ago
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Recent years show an increas­ing inter­est in ver­ti­cal search: search­ing within a par­tic­u­lar type of infor­ma­tion. Under­stand­ing what peo­ple search for in these “ver­ti­cals” gives direc­tion to research and pro­vides point­ers for the search engines them­selves. In this paper we ana­lyze the search logs of one par­tic­u­lar ver­ti­cal: peo­ple

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Dynamic term cloud screenshot

Online Religious Studies

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11 months ago
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Data tran­si­tions have rev­o­lu­tion­ized many sci­en­tific dis­ci­plines, start­ing with the exact sci­ences, then the life sci­ences, and now the social sci­ences and human­i­ties are in the process of mak­ing the tran­si­tion to becom­ing data inten­sive sci­ences, with descrip­tions through quan­ti­ta­tive mea­sure­ments. New analy­sis tools, and pub­licly acces­si­ble utter­ances, opin­ions, trans­ac­tions More >

Classifying People Queries

Classifying Queries Submitted to a Vertical Search Engine

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11 months ago
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We pro­pose and moti­vate a scheme for clas­si­fy­ing queries sub­mit­ted to a peo­ple search engine. We spec­ify a num­ber of fea­tures for auto­mat­i­cally clas­si­fy­ing peo­ple queries into the pro­posed classes and exam­ine the effec­tive­ness of these fea­tures. Our main find­ing is that clas­si­fi­ca­tion is fea­si­ble and that using infor­ma­tion from More >

Dutch Belgian Information Retrieval Workshop logo

Dir 2011: the eleventh Dutch-Belgian information retrieval workshop

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1 year ago
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The 11th edi­tion of the annual Dutch-Belgian Infor­ma­tion Retrieval work­shop (DIR 2011) took place on Feb­ru­ary 4 in Ams­ter­dam. It was orga­nized by the Uni­ver­sity of Ams­ter­dam and the Cen­trum Wiskunde & Infor­mat­ica. The focus of this year’s work­shop was on inter­ac­tion, with the goal of facil­i­tat­ing and increas­ing More >

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