Author image not provided
 Djoerd Hiemstra

 homepage
 hiemstraatcs.utwente.nl

ACM Senior Member badge
  Affiliation history
Bibliometrics: publication history
Average citations per article8.70
Citation Count861
Publication count99
Publication years1997-2017
Available for download56
Average downloads per article368.16
Downloads (cumulative)20,617
Downloads (12 Months)1,009
Downloads (6 Weeks)205
SEARCH
ROLE
Arrow RightAuthor only
· Editor only
· All roles


AUTHOR'S COLLEAGUES
See all colleagues of this author

SUBJECT AREAS
See all subject areas




BOOKMARK & SHARE


99 results found Export Results: bibtexendnoteacmrefcsv

Result 1 – 20 of 99
Result page: 1 2 3 4 5

Sort by:

1 published by ACM
October 2017 ICIME 2017: Proceedings of the 9th International Conference on Information Management and Engineering
Publisher: ACM
Bibliometrics:
Citation Count: 0
Downloads (6 Weeks): 5,   Downloads (12 Months): 27,   Downloads (Overall): 27

Full text available: PDFPDF
We argue that there is a need for Multi-Tenant Customizable OLTP systems. Such systems need a Multi-Tenant Customizable Database (MTC-DB) as a backing. To stimulate the development of such databases, we propose the benchmark MTCB. Benchmarks for OLTP exist and multi-tenant benchmarks exist, but no MTC-DB benchmark exists that accounts ...
Keywords: Database, Multi-Tenant Customizable, Benchmark, Multi-level customizability, OLTP

2 published by ACM
August 2017 SIGIR '17: Proceedings of the 40th International ACM SIGIR Conference on Research and Development in Information Retrieval
Publisher: ACM
Bibliometrics:
Citation Count: 0
Downloads (6 Weeks): 6,   Downloads (12 Months): 70,   Downloads (Overall): 104

Full text available: PDFPDF
People tend to type short queries, however, the belief is that longer queries are more effective. Consequently, a number of attempts have been made to encourage and motivate people to enter longer queries. While most have failed, a recent attempt - conducted in a laboratory setup - in which the ...
Keywords: a/b testing, halo, query length, research replication

3 published by ACM
August 2017 ACM SIGIR Forum - SIGIR Test-of-Time Awardees 1978-2001: Volume 51 Issue 2, July 2017
Publisher: ACM
Bibliometrics:
Citation Count: 0
Downloads (6 Weeks): 4,   Downloads (12 Months): 9,   Downloads (Overall): 9

Full text available: PDFPDF

4 published by ACM
November 2016 iiWAS '16: Proceedings of the 18th International Conference on Information Integration and Web-based Applications and Services
Publisher: ACM
Bibliometrics:
Citation Count: 0
Downloads (6 Weeks): 3,   Downloads (12 Months): 23,   Downloads (Overall): 32

Full text available: PDFPDF
Web content changes rapidly [18]. In Focused Web Harvesting [17] which aim it is to achieve a complete harvest for a given topic, this dynamic nature of the web creates problems for users who need to access a set of all the relevant web data to their topics of interest. ...

5 published by ACM
October 2016 CIKM '16: Proceedings of the 25th ACM International on Conference on Information and Knowledge Management
Publisher: ACM
Bibliometrics:
Citation Count: 4
Downloads (6 Weeks): 6,   Downloads (12 Months): 46,   Downloads (Overall): 172

Full text available: PDFPDF
Users tend to articulate their complex information needs in only a few keywords, making underspecified statements of request the main bottleneck for retrieval effectiveness. Taking advantage of feedback information is one of the best ways to enrich the query representation, but can also lead to loss of query focus and ...
Keywords: pseudo relevance feedback, relevance feed- back, significant words language models

6
October 2016 Information Retrieval: Volume 19 Issue 5, October 2016
Publisher: Kluwer Academic Publishers
Bibliometrics:
Citation Count: 0

We evaluate five term scoring methods for automatic term extraction on four different types of text collections: personal document collections, news articles, scientific articles and medical discharge summaries. Each collection has its own use case: author profiling, boolean query term suggestion, personalized query suggestion and patient query expansion. The methods ...
Keywords: Author profiling, Evaluation, Query suggestion, Term scoring, Term extraction, Query expansion

7
June 2016 Information Retrieval: Volume 19 Issue 3, June 2016
Publisher: Kluwer Academic Publishers
Bibliometrics:
Citation Count: 2

Evaluation of search engines relies on assessments of search results for selected test queries, from which we would ideally like to draw conclusions in terms of relevance of the results for general (e.g., future, unknown) users. In practice however, most evaluation scenarios only allow us to conclusively determine the relevance ...
Keywords: Test collections, Graded relevance assessments for information retrieval, Assessor disagreement, Information retrieval evaluation

8 published by ACM
December 2015 iiWAS '15: Proceedings of the 17th International Conference on Information Integration and Web-based Applications & Services
Publisher: ACM
Bibliometrics:
Citation Count: 1
Downloads (6 Weeks): 3,   Downloads (12 Months): 9,   Downloads (Overall): 23

Full text available: PDFPDF
With the goal of harvesting all information about a given entity, in this paper, we try to harvest all matching documents for a given query submitted on a search engine. The objective is to retrieve all information about for instance "Michael Jackson", "Islamic State", or "FC Barcelona" from indexed data ...
Keywords: web mining, data coverage, data extraction, deep web, web harvester, world wide web

9 published by ACM
August 2015 SIGIR '15: Proceedings of the 38th International ACM SIGIR Conference on Research and Development in Information Retrieval
Publisher: ACM
Bibliometrics:
Citation Count: 0
Downloads (6 Weeks): 13,   Downloads (12 Months): 91,   Downloads (Overall): 423

Full text available: PDFPDF
Recommendation based on user preferences is a common task for e-commerce websites. New recommendation algorithms are often evaluated by offline comparison to baseline algorithms such as recommending random or the most popular items. Here, we investigate how these algorithms themselves perform and compare to the operational production system in large ...
Keywords: industrial case studies, multi-criteria ranking, travel applications, travel recommendations

10 published by ACM
May 2015 WWW '15 Companion: Proceedings of the 24th International Conference on World Wide Web
Publisher: ACM
Bibliometrics:
Citation Count: 1
Downloads (6 Weeks): 5,   Downloads (12 Months): 12,   Downloads (Overall): 77

Full text available: PDFPDF
This paper presents 'FedWeb Greatest Hits', a large new test collection for research in web information retrieval. As a combination and extension of the datasets used in the TREC Federated Web Search Track, this collection opens up new research possibilities on federated web search challenges, as well as on various ...
Keywords: federated web search, test collection

11 published by ACM
February 2015 WSDM '15: Proceedings of the Eighth ACM International Conference on Web Search and Data Mining
Publisher: ACM
Bibliometrics:
Citation Count: 0
Downloads (6 Weeks): 4,   Downloads (12 Months): 9,   Downloads (Overall): 101

Full text available: PDFPDF
The HIA'15 workshop aims to bring together information retrieval practitioners from industry and academic researchers concerned with heterogeneous information access and search federation. We would like to create a forum to encourage discussion and exchange of ideas on heterogeneous information access in different contexts. To facilitate the discussion, we encourage ...
Keywords: aggregated search, composite retrieval, federated search, heterogeneous information access

12 published by ACM
November 2014 CIKM '14: Proceedings of the 23rd ACM International Conference on Conference on Information and Knowledge Management
Publisher: ACM
Bibliometrics:
Citation Count: 3
Downloads (6 Weeks): 4,   Downloads (12 Months): 13,   Downloads (Overall): 79

Full text available: PDFPDF
Selecting and aggregating different types of content from multiple vertical search engines is becoming popular in web search. The user vertical intent , the verticals the user expects to be relevant for a particular information need, might not correspond to the vertical collection relevance , the verticals containing the most ...
Keywords: aggregated search, evaluation, federated search, user intent, vertical relevance

13
September 2014 World Wide Web: Volume 17 Issue 5, September 2014
Publisher: Kluwer Academic Publishers
Bibliometrics:
Citation Count: 1

In this paper, we address the problem of scientific-social network integration to find a matching relationship between members of these networks (i.e. The DBLP publication network and the Twitter social network). This task is a crucial step toward building a multi environment expert finding system that has recently attracted much ...
Keywords: DBLP, Collective classification, Twitter, Social network integration

14
July 2014 Journal of the Association for Information Science and Technology: Volume 65 Issue 7, July 2014
Publisher: John Wiley & Sons, Inc.
Bibliometrics:
Citation Count: 0

Children represent an increasing group of web users. Some of the key problems that hamper their search experience is their limited vocabulary, their difficulty in using the right keywords, and the inappropriateness of their general-purpose query suggestions. In this work, we propose a method that uses tags from social media ...
Keywords: assisted searching, children, query refinement

15
March 2014 Information Processing and Management: an International Journal: Volume 50 Issue 2, March, 2014
Publisher: Pergamon Press, Inc.
Bibliometrics:
Citation Count: 1

In this paper, we propose an optimization framework to retrieve an optimal group of experts to perform a multi-aspect task. While a diverse set of skills are needed to perform a multi-aspect task, the group of assigned experts should be able to collectively cover all these required skills. We consider ...
Keywords: Greedy approach, Topic model, Facility location analysis, Linear programming, Expert finding, Expert group formation

16 published by ACM
March 2014 ACM Transactions on the Web (TWEB): Volume 8 Issue 2, March 2014
Publisher: ACM
Bibliometrics:
Citation Count: 11
Downloads (6 Weeks): 10,   Downloads (12 Months): 87,   Downloads (Overall): 1,019

Full text available: PDFPDF
The Internet is increasingly used by young children for all kinds of purposes. Nonetheless, there are not many resources especially designed for children on the Internet and most of the content online is designed for grown-up users. This situation is problematic if we consider the large differences between young users ...
Keywords: Yahoo! Search, browsing behavior, query logs, search behavior, Yahoo! Answers, adults, toolbar logs, Children, Web search, session analysis, topic classification, young adults

17 published by ACM
February 2014 WSDM '14: Proceedings of the 7th ACM international conference on Web search and data mining
Publisher: ACM
Bibliometrics:
Citation Count: 6
Downloads (6 Weeks): 2,   Downloads (12 Months): 17,   Downloads (Overall): 143

Full text available: PDFPDF
To express a more nuanced notion of relevance as compared to binary judgments, graded relevance levels can be used for the evaluation of search results. Especially in Web search, users strongly prefer top results over less relevant results, and yet they often disagree on which are the top results for ...
Keywords: user disagreement, graded relevance, evaluation

18
December 2013 ICMLA '13: Proceedings of the 2013 12th International Conference on Machine Learning and Applications - Volume 01
Publisher: IEEE Computer Society
Bibliometrics:
Citation Count: 0

Structured prediction has wide applications in many areas. Powerful and popular models for structured prediction have been developed. Despite the successes, they suffer from some known problems: (i) Hidden Markov models are generative models which suffer from the mismatch problem. Also it is difficult to incorporate overlapping, non-independent features into ...
Keywords: Co-occurrence Rate, Factorization, Undirected Graphical Models, CRFs

19
October 2013 Information Retrieval: Volume 16 Issue 5, October 2013
Publisher: Kluwer Academic Publishers
Bibliometrics:
Citation Count: 0

Concept based video retrieval often relies on imperfect and uncertain concept detectors. We propose a general ranking framework to define effective and robust ranking functions, through explicitly addressing detector uncertainty. It can cope with multiple concept-based representations per video segment and it allows the re-use of effective text retrieval functions ...
Keywords: Representation uncertainty, Video retrieval, Concept-based representation

20 published by ACM
July 2013 SIGIR '13: Proceedings of the 36th international ACM SIGIR conference on Research and development in information retrieval
Publisher: ACM
Bibliometrics:
Citation Count: 15
Downloads (6 Weeks): 8,   Downloads (12 Months): 38,   Downloads (Overall): 276

Full text available: PDFPDF
Search engines can improve their efficiency by selecting only few promising shards for each query. State-of-the-art shard selection algorithms first query a central index of sampled documents, and their effectiveness is similar to searching all shards. However, the search in the central index also hurts efficiency. Additionally, we show that ...
Keywords: distributed retrieval, database selection



The ACM Digital Library is published by the Association for Computing Machinery. Copyright © 2018 ACM, Inc.
Terms of Usage   Privacy Policy   Code of Ethics   Contact Us