Publications

A list of my scientific publications. You can use the menu above to filter on a specific type or use the term cloud to look for publications on a certain topic. Alternatively, you can use the search box if you know what you’re looking for. A more succinct version of this list can be found on the ILPS website.

linking open data datasets

Zoekmachines van de toekomst

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8 hours ago
by in , ,

Er bestaat enige dis­cussie over wat de logis­che opvol­ger zal zijn van web 2.0, waarin user-generated con­tent, het delen van infor­matie en inter­op­er­abiliteit cen­traal ston­den. Hoewel meer ideeën de ronde doen, is er veel steun voor het idee web 3.0 gelijk te stellen aan het seman­tis­che web. Het sturende idee More >

TREC

The University of Amsterdam at the TREC 2011 Session Track

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2 weeks ago
by in ,

We describe the par­tic­i­pa­tion of the Uni­ver­sity of Amsterdam’s ILPS group in the Ses­sion track at TREC 2011.

The stream of inter­ac­tions cre­ated by a user engag­ing with a search sys­tem con­tains a wealth of infor­ma­tion. For retrieval pur­poses, pre­vi­ous inter­ac­tions can help inform us about a user’s cur­rent More >

P30 difference plot

Team COMMIT at TREC 2011

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2 weeks ago
by in ,

We describe the par­tic­i­pa­tion of Team COMMIT in this year’s Microblog and Entity track.

In our par­tic­i­pa­tion in the Microblog track, we used a feature-based approach. Specif­i­cally, we pur­sued a pre­ci­sion ori­ented recency-aware retrieval approach for tweets. Amongst oth­ers we used var­i­ous types of exter­nal data. In par­tic­u­lar, we More >

TREC

DutchHatTrick: Semantic query modeling, ConText, section detection, and match score maximization.

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2 weeks ago
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This report dis­cusses the col­lab­o­ra­tive work of the Eras­musMC, Uni­ver­sity of Twente, and the Uni­ver­sity of Ams­ter­dam on the TREC 2011 Med­ical track. Here, the task is to retrieve patient vis­its from the Uni­ver­sity of Pitts­burgh NLP Repos­i­tory for 35 top­ics. The repos­i­tory con­sists of 101,711 patient reports, More >

Plot of a query-specific burst

Adaptive Temporal Query Modeling

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2 months ago
by in ,

To appear

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. More >

social media icons

A Framework for Unsupervised Spam Detection in Social Networking Sites

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2 months ago
by in ,

To appear

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 More >

Research on Twitter

Adding Semantics to Microblog Posts

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3 months ago
by in ,

To appear

Microblogs have become an impor­tant source of infor­ma­tion for mar­ket­ing, intel­li­gence, and rep­u­ta­tion man­age­ment pur­poses. Streams of microblogs are of great value because of their direct and real-time nature. Deter­min­ing what an indi­vid­ual microblog post is about, how­ever, can be non-trivial because of cre­ative lan­guage usage, the highly More >

onszelf voorbij

Wij-woorden op websites: Zoekmachines voor geesteswetenschappers

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5 months ago
by in ,

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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6 months ago
by in ,

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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6 months ago
by in ,

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

More >

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