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Jan Flokstra

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1977 …2018
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Research Output 1977 2018

2018
1 Citation (Scopus)
3 Downloads (Pure)

Flipper 2.0: A Pragmatic Dialogue Engine for Embodied Conversational Agents

van Waterschoot, J. B., Bruijnes, M., Flokstra, J., Reidsma, D., Davison, D. P., Theune, M. & Heylen, D. K. J., 5 Nov 2018, Proceedings of the 18th International Conference on Intelligent Virtual Agents. 18 ed. ACM Press, p. 43-50 8 p.

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Engines
2016
1 Citation (Scopus)
3 Downloads (Pure)

JudgeD: a probabilistic datalog with dependencies

Wanders, B., van Keulen, M. & Flokstra, J., 13 Feb 2016, p. -. 6 p.

Research output: Contribution to conferencePaperAcademicpeer-review

2015
3 Citations (Scopus)
16 Downloads (Pure)

Incremental data uncertainty handling using evidence combination: a case study on maritime data reasoning

Habib, M. B., Wanders, B., Flokstra, J. & van Keulen, M., Sep 2015, Proceedings of the 5th DEXA Workshop on Information Systems for Situation Awareness and Situation Management (ISSASiM 2015). USA: IEEE Computer Society, p. 147-151 5 p.

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

File
Cleaning
Semantics
Uncertainty
2013
16 Downloads (Pure)

//Rondje Zilverling: COMMIT/TimeTrails

van Keulen, M., de Graaff, V., Zhu, Z., de By, R. A., Wombacher, A. & Flokstra, J., Sep 2013, In : I/O Vivat. 28, 4, p. 16-17 2 p.

Research output: Contribution to journalArticleProfessional

File
5 Citations (Scopus)

Point of interest to region of interest conversion

de Graaff, V., de By, R. A., van Keulen, M. & Flokstra, J., Nov 2013, SIGSPATIAL'13: Proceedings of the 21st ACM SIGSPATIAL International Conference on Advances in Geographic Information Systems. New York: Association for Computing Machinery (ACM), p. 388-391 4 p.

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Trajectories
2009
11 Citations (Scopus)
1 Downloads (Pure)

A MEMS-based gravity gradiometer for future planetary missions

Flokstra, J., Flokstra, J., Cuperus, R., Cupurus, R., Wiegerink, R. J. & van Essen, M. C., Nov 2009, In : Cryogenics. 49, 11, p. 665-668 4 p., 10.1016/j.cryogenics.2008.12.019.

Research output: Contribution to journalArticleAcademicpeer-review

23 Downloads (Pure)

Gravity gradiometer system for Earth Exploration

Cuperus, R., Flokstra, F. F., Droogendijk, H., Wiegerink, R. J., Flokstra, J. & Flokstra, J., Nov 2009. 1 p.

Research output: Contribution to conferencePaperAcademic

File
2008
8 Downloads (Pure)

Sound ranking algorithms for XML search

Hiemstra, D., Klinger, S., Rode, H., Flokstra, J. & Apers, P. M. G., 24 Jul 2008, Proceedings of the 2nd SIGIR workshop on Focused Retrieval. Dunedin, New Zealand: University of Otago, p. 15-21 7 p.

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

File
XML
Acoustic waves
Semantics
2007
18 Downloads (Pure)

PF/Tijah Documentation

Hiemstra, D., Rode, H. & Flokstra, J., Nov 2007, Enschede: Databases (DB). 20 p. (CTIT Technical Report Series; no. Paper P-NS/TR-CTIT-07-77)

Research output: Book/ReportReportProfessional

File
2006
78 Citations (Scopus)
49 Downloads (Pure)

A capacitive rf power sensor based on mems technology

Fernandez, L. J., Wiegerink, R. J., Flokstra, J., Flokstra, J., Sesé, J., Jansen, H. V. & Elwenspoek, M. C., 28 Apr 2006, In : Journal of micromechanics and microengineering. 16, IEEE Produ, p. S1099-S1107 9 p., 10.1088/0960-1317/16/7/001.

Research output: Contribution to journalArticleAcademicpeer-review

File
1 Citation (Scopus)
21 Downloads (Pure)

Fabrication of thick silicon nitride blocks embedded in low-resistivity silicon substrates for radio frequency applications

Fernandez, L. J., Berenschot, J. W., Wiegerink, R. J., Flokstra, J., Flokstra, J., Jansen, H. V. & Elwenspoek, M. C., 20 Mar 2006, In : Journal of micromechanics and microengineering. 16, IEEE Produ, p. 862-868 7 p.

Research output: Contribution to journalArticleAcademicpeer-review

File
2 Citations (Scopus)
14 Downloads (Pure)

MonetDB/XQuery - Consistent & Efficient Updates on the Pre/Post Plane

Boncz, P., Flokstra, J., Grust, T., van Keulen, M., Manegold, S., Mullender, S., Rittinger, J. & Teubner, J., Mar 2006, Proceedings of the 10th International Conference on Extending Database Technology (EDBT 2006). Berlin, Germany: Springer, p. 1190-1193 4 p. 10.1007/11687238_89. (Lecture Notes in Computer Science; vol. 3896).

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

File
21 Downloads (Pure)

PFTijah: text search in an XML database system

Hiemstra, D., Rode, H., van Os, R. & Flokstra, J., 2006, Proceedings of the 2nd International Workshop on Open Source Information Retrieval (OSIR). Ecole Nationale Supérieure des Mines de Saint-Etienne, p. 12-17 6 p.

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademic

File
2005

MonetDB/XQuery, Technology preview open source release 1

Boncz, P., Manegold, S., Mullender, S., van Keulen, M., Flokstra, J., Grust, T., Teubner, J. & Rittinger, J., 15 Jun 2005, Amsterdam, The Netherlands

Research output: Other contributionOther research output

2003
1 Citation (Scopus)

Moa and the multi-model architecture: a new perspective on NF2

van Keulen, M., Vonk, J., de Vries, A. P., Flokstra, J. & Blok, H. E., 1 Sep 2003, Database and Expert Systems Applications. Marik, V., Retschitzegger, W. & Stepankova, O. (eds.). Heidelberg: Springer, p. 67-76

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

25 Downloads (Pure)

Moa and the multi-model architecture: a new perspective on NF2

van Keulen, M., Marik, V. (ed.), Vonk, J., Retschitzegger, W. (ed.), de Vries, A. P., Stepankova, O. (ed.), Flokstra, J. & Blok, H. E., Sep 2003, p. 67-76. 10 p.

Research output: Contribution to conferencePaperAcademicpeer-review

File
33 Citations (Scopus)
38 Downloads (Pure)

Radio frequency power sensor based on MEMS technology

Fernandez, L. J., Visser, E., Sesé, J., Wiegerink, R. J., Jansen, H. V., Flokstra, J., Flokstra, J. & Elwenspoek, M. C., Oct 2003, p. 549-552. 4 p.

Research output: Contribution to conferencePaperAcademicpeer-review

File
2002
7 Downloads (Pure)

Moa: extensibility and efficiency in querying nested data

van Keulen, M., Vonk, J., de Vries, A. P., Flokstra, J. & Blok, H. E., Jul 2002, Centre for Telematics and Information Technology (CTIT). 31 p. (CTIT Technical Report Series; no. 02-19)

Research output: Book/ReportReportAcademic

Open Access
File
1998
5 Citations (Scopus)

Road Collapse in Magnum

Wilschut, A. N., van Zwol, R., Flokstra, J., Brasa, N. & Quak, W., Nov 1998, Proceedings of the 6th ACM international symposium on Advances in Geographic Information Systems. New York, NY, USA: ACM Press, p. 20-27 8 p. 10.1145/288692.288698

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

1996
46 Downloads (Pure)

Extending a multi-set relational algebra to a parallel environment

Grefen, P. W. P. J. & Flokstra, J., Jan 1996, In : Distributed and parallel databases. 4, 1, p. 81-99 19 p., 10.1007/BF00122149.

Research output: Contribution to journalArticleAcademicpeer-review

File

Extending a Multi-Set Relational Algebra to a Parallel Environment

Grefen, P. W. P. J. & Flokstra, J., 1996, In : Distributed and parallel databases. 4, 1, p. 81-99

Research output: Contribution to journalArticleAcademicpeer-review

1 Citation (Scopus)

Parallel Evaluation of Multi-join Queries

Wilschut, A. N., Flokstra, J. & Apers, P. M. G., 7 Feb 1996, Proc. Third International ACPC Conference. Klagenfurt, Germany, p. 90-97

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

45 Downloads (Pure)

Parallel Evaluation of Multi-join Queries

Wilschut, A. N., Flokstra, J. & Apers, P. M. G., Sep 1996, p. 90-97. 8 p.

Research output: Contribution to conferencePaperAcademicpeer-review

File
1995

A Framework for Representation, Validation and Implementation of Database Application Semantics

van Keulen, M., Skowronek, J., Apers, P. M. G., Balsters, H., de By, R. A. & Flokstra, J., 30 May 1995, Proc. IFIP TC-2 Conf. on Data Semantics (DS-6). Atlanta, U.S.A., p. -

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

36 Downloads (Pure)

A Framework for Representation, Validation and Implementation of Database Application Semantics

van Keulen, M., Skowronek, J., Apers, P. M. G., Balsters, H., Blanken, H., de By, R. A., de By, R. A. & Flokstra, J., 1995, Enschede, The Netherlands: University of Twente. 11 p. (Memoranda Informatica; no. INF 95-37)

Research output: Book/ReportReportOther research output

File

A Framework for Representation, Validation and Implementation of Databases Application Semantics

van Keulen, M., Skowronek, J., Apers, P. M. G., Balsters, H., Blanken, H., de By, R. A. & Flokstra, J., Jun 1995, Proceedings of the IFIP WG 2.6 Working Conference on Database Applications Semantics (DS-6). meersman, R. & Mark, L. (eds.). London: Springer, p. 526-546 21 p. (IFIP Advances in Information and Communication Technology).

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Design and Validation of Reliable Complex Computer Systems

van Keulen, M., Skowronek, J., Apers, P. M. G., Balsters, H., Blanken, H., de By, R. A. & Flokstra, J., 1995, In : Memoranda informatica. 95, 38, p. - 10 p.

Research output: Contribution to journalArticleAcademic

Design and Validation of Reliable Complex Computer Systems

van Keulen, M., Skowronek, J., Apers, P. M. G., Balsters, H., Blanken, H., de By, R. A. & Flokstra, J., Oct 1995, Enschede, The Netherlands: University of Twente. 10 p.

Research output: Book/ReportReportOther research output

Parallel evaluation of multi-join queries

Wilschut, A. N., Flokstra, J. & Apers, P. M. G., 29 Jan 1995, ACM SIGMOD International Conference on Management of Data. San Jose, U.S.A., p. -

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

44 Citations (Scopus)
64 Downloads (Pure)

Parallel evaluation of multi-join queries

Wilschut, A. N., Flokstra, J. & Apers, P. M. G., May 1995, ACM SIGMOD International Conference on Management of Data (SIGMOD 1995). New York, NY, USA: ACM Press, p. 115-126 12 p. 10.1145/223784.223803

Research output: Chapter in Book/Report/Conference proceedingChapterAcademicpeer-review

File

Parallel Evaluation of Multi-Join Queries

Wilschut, A. N., Flokstra, J. & Apers, P. M. G., 5 Jan 1995, Proc. ACM SIGMOD International Conference on Management of Data. San Jose, Ca, USA, p. 115-126

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

1994

Extending a multi-set relational algebra to a parallel environment

Grefen, P. W. P. J. & Flokstra, J., 1994, In : Memoranda informatica. 94, 50, p. - 18 p.

Research output: Contribution to journalArticleProfessional

Impress/UT-Soft-D34-001-R1, TMQL Implementation, deliverable S34

Apers, P. M. G., Blanken, H., Balsters, H., Flokstra, J., Boon, R. T., Skowronek, J. & van Keulen, M., 23 Jan 1994, Evry, Frankrijk

Research output: Other contributionOther research output

Impress/UT-soft-D41-001-R1, Database Design Tool, deliverable S41

Apers, P. M. G., Blanken, H., Balsters, H., Flokstra, J., Boon, R. T., Skowronek, J. & van Keulen, M., 23 Jan 1994, Evry, Frankrijk

Research output: Other contributionOther research output

11 Downloads (Pure)

IMPRESS Database Design Tool - a high-level design toolset based on formal theory

Flokstra, J., van Keulen, M. & Skowronek, J., Jul 1994, Proceedings of the 8th European Conference on Object-Oriented Programming (ECOOP 1994). Tokoro, M. & Pareschi, R. (eds.). Demo-papers not included in on-line proceedings, 4 p.

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

File

PRISMA/DB: A Parallel, Main Memory Relational DBMS

Apers, P. M. G., van den Berg, C. A., Flokstra, J., Grefen, P. W. P. J., Kersten, M. L. & Wilschut, A. N., 1994, Parallel Architectures for Data/Knowledge Base Systems. Los Alamitos, California, USA: IEEE Computer Society Press, p. - 14 p.

Research output: Chapter in Book/Report/Conference proceedingChapterAcademic

2 Citations (Scopus)
22 Downloads (Pure)

The IMPRESS DDT: a database design toolbox based on a formal specification language

Flokstra, J., van Keulen, M. & Skowronek, J., May 1994, Proceedings of the 1994 ACM SIGMOD international conference on Management of data (SIGMOD 1994). New York, NY, USA: ACM Press, p. 506-506 1 p.

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Open Access
File
Specification languages
Information systems
Managers
Formal specification
1993

Implementation and performance evaluation of a parallel transitive closure algorithm on PRISMA/DB

Houtsma, M. A. W., Wilschut, A. N. & Flokstra, J., 27 Jan 1993, VLDB 93 conference. Dublin, p. 206-217

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

38 Downloads (Pure)

Implementation and Performance Evaluation of a Parallel Transitive Closure Algorithms on PRISMA/DB

Houtsma, M. A. W., Wilschut, A. N. & Flokstra, J., Aug 1993, p. 206-217. 12 p.

Research output: Contribution to conferencePaperAcademicpeer-review

File

The TM manual, version 2.0

Apers, P. M. G., de By, R. A., Blanken, H., Balsters, H., Skowronek, J., Steenhagen, H. J., van Keulen, M., Wilschut, A. N., Flokstra, J. & Blok, R. J., 16 Feb 1993, Enschede

Research output: Other contributionOther research output

1992

Implementation and performance evaluation of a parallel transitive closure algorithm on PRISMA/DB

Houtsma, M. A. W., Wilschut, A. N. & Flokstra, J., 1992, In : Memoranda informatica. 92, 45, p. - 19 p.

Research output: Contribution to journalArticleProfessional

Parallelism in a main-memory system: The performance of PRISMA/DB

Wilschut, A. N., Flokstra, J. & Apers, P. M. G., 27 Aug 1992, 18th International Conference of Very Large Data Bases.. Vancouver, p. 521-532

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

16 Downloads (Pure)

Parallelism in a Main-Memory System: The Performance of PRISMA/DB

Wilschut, A. N., Flokstra, J. & Apers, P. M. G., Aug 1992, p. 521-532. 12 p.

Research output: Contribution to conferencePaperAcademicpeer-review

File

Parallelism in a main-memory system: The performance of PRISMA/DB.

Wilschut, A. N., Flokstra, J. & Apers, P. M. G., 1992, In : Memoranda informatica. 92, 45, p. - 18 p.

Research output: Contribution to journalArticleProfessional

Performance evaluation of integrity control in a parallel main-memory database system

Grefen, P. W. P. J., Flokstra, J. & Apers, P. M. G., 1 Sep 1992, Database and expert systems applications. Vienna: Springer, p. 96-101

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Performance Evaluation of Integrity Control in a Parallel Main-Memory Database System

Grefen, P. W. P. J., Flokstra, J. & Apers, P. M. G., 1992, Proceedings of the 3rd International Conference on Database and Expert System Applications (DEXA 1992). Vienna, Austria: Springer, p. 96-101 6 p.

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

46 Citations (Scopus)
28 Downloads (Pure)

PRISMA/DB: A Parallel Main-Memory Relational DBMS

Apers, P. M. G., Flokstra, J., van den Berg, C. A., Grefen, P. W. P. J., Wilschut, A. N., Kersten, M. L. & van den Berg, C. A., Dec 1992, In : IEEE transactions on knowledge and data engineering. 4, 6, p. 541-554 14 p.

Research output: Contribution to journalArticleAcademicpeer-review

File

PRISMA/DB: A Parallel Main-Memory Relational DBMS

Apers, P. M. G., van de Berg, C. A., Flokstra, J., Grefen, P. W. P. J., Kersten, M. L. & Wilschut, A. N., 1992, In : Memoranda informatica. 92, 12, p. - 24 p.

Research output: Contribution to journalArticleProfessional

1991

PRISMA DB1 User manual

Grefen, P. W. P. J., Wilschut, A. N. & Flokstra, J., 1991, In : Memoranda informatica. 1, 6, p. - 47 p.

Research output: Contribution to journalArticleProfessional

1990
7 Citations (Scopus)
32 Downloads (Pure)

Parallel Handling of Integrity Constraints

Grefen, P. W. P. J., Flokstra, J. & Apers, P. M. G., 24 Sep 1990, PRISMA workshop on parallel database systems. Noordwijk, Nederland: Springer, p. 222-238 17 p. (Lecture Notes in Computer Science; vol. 503).

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

File