2006 : EAFS-meeting Helsinki : workshop digital evidence and contributor to several other workshops
2006 : February AAFS Annual Meeting, Seattle 18-25 February : 
                    - workshop Image Processing
                    - paper on Formats and CODECS
                    - paper on Biometric Devices
                    - paper on Validation Fingerprints
2005 : Biometrics e-symposium : presentation on Biometric Devices

2005 : September : organisation of IOCE / FIDIS/ ENFSI-FIT meeting in Amsterdam from 14-16 September and introduction on FIDIS
2005 : August : IAFS International Association of Forensic Science  
                Contribution Workshop on Digital Evidence - introduction to various types of digital evidence,            mobile phones, media analysis and video demonstration of RDD-disk, TULP2G and analyzing formats and codecs of videostreams.
                Scientific session, paper on Biometric Devices and FIDIS
2005 : May FIDIS presentation Tilburg on identity theft and biometrics
2005 : February FIDIS presentation on profiling and forensic science
2005 : February AAFS Workshop on image and video processing ; presentation on biometric devices and presentation on Questions about integrity.pps .2004 : September FIDIS workshop and ENFSI-FIT
2004 : February AAFS conference - Dallas workshop on image and video processing and a presentation on 3D acquisition techniques for image databases in forensic science
2003 : Conference NGI-Zuid : "Slim Zoeken - Slim Beveiligen", together with Ruud van Munster from TNO.
2003 :  AAFS-conference - a paper on Forensic use of Biometric Access Devices, 21 February 2003
2003 : SPIE-conference www.spie.org - Aerosense - Investigative Image Processing : chairing and presenting a paper with topic Extracting forensic evidence from biometric devices.
2003 : EAFS-conference - a paper on Biometrics  and contributions to closed sessions of digital evidence, fingerprints and image processing, 25 September 2003
2003 : University of Amsterdam - invited lecture on digital evidence, 19 november 2003.
2002 : AAFS - two papers on photogrammetry in video images and quality assurance in digital evidence
2002 : Techno 2002 presented a paper on tools and techniques in digital evidence
2002 : SPIE- conference Aerosense 2002 Chairman Investigative Image Processing - two papers presented
2002 : June - PhD degree obtained at the University of Utrecht on doctoral thesis "Content-Based Information Retrieval from Forensic Image Databases"
2002 : ENFSI-FIT Conference, Oslo - presentation and selected as vice-chairman
2002 : Presented part of course on Digital Evidence at the University of Nijenrode
2002 : Digital Evidence presentations for SSR
2002 : Conference for Digital Blue (Dutch Police) - workshop Tools and Techniques in Digital Evidence
2001 : January Forensic Medicon - India, Jaipur , invited speaker for Use of Internet and Image Processing in Forensic Medicine and Forensic Science - paper also available
2001 : February AAFS-meeting in Seattle : workshop Internet : literature databases and paper on use of image databases in forensic science.
2001 : March European Connections in Amsterdam (Forensic Science Society). Paper on new developments in forensic image processing and pattern recognition
2001 : May - Frenzy conference - digital evidence / image processing / Internet
2001 : May - image processing in TV-program of Noorderlicht VPRO- Dutch
2001 : September HTCIA
2000 : AAFS, Reno, workshop internet in Forensic Science + paper on identification of camera's.
2000 : June 15,16 Organizer of ENFSI-conference on Forensic IT
2000 : July 2,3 : Switzerland, Use of internet and imaging in forensic medicine
2000 : Irish Machine Vision & Image Processing Conference 31 August - 2 September 2000, Invited speaker Pattern recognition and image processing in forensic science PDF and here you can see me presenting this paper on line during 50 minutes
2000 : November SPIE meeting in Boston (four papers submitted and accepted)
2000 : December IOCE/ENFSI-meeting in Paris. Chaired a session on Digital Imaging and Audio.
1999 : ASCII-conference : one paper presented
1999 : IAFS-conference ; two papers presented : one on video
1999:  ICIP-conference, Tokyo, key note speaker on forensic image processing in law enforcement
1998 : SPIE Photonics West : Investigating Video Sequences / Pattern recognition in a database of cartridge cases
1997 : AAFS : workshop use of internet in forensics
1997 : SPTM-conference : use of internet in forensics
1996: July, AFTE-conference
1996 : WPMO - Kumamoto; paper on crossbow case
1996 : IAFS-Tokyo workshop on use of internet in forensics / classification of shoeprofiles with neural networks
1995 : International Meeting for Shoeprint and Toolmark-examiners, Helsinki, 2 papers and workshop shoeprints
1995 : SPIE-conference in San Diego : automatic recognition with neural networks of shoeprofiles
1995 : NRIPS (National Research Institute of Police Science) 2 months in a project
1994 : AFTE-congres, Indianapolis
1994 : International conference on shoeprints FBI-Academy
1994 : Londen, "Image processing in Forensic Science", conference, paper on imaging systems
1993 : Düsseldorf congress IAFS "A new approach to automatic comparison of toolmarks"
1993 : Dusseldorf congress IAFS "A nationwide database system for shoeprints
 

Please visit Publications for more information on the articles that have been published for these conferences.