Study Group Mathematics with Industry 1998
SWI 2011 was held at the University of Leiden. Problems were submitted by AKZO-NOBEL, Daniel den Hoedkliniek, Eldim, KPN, NMI and Trespa.
Organisers SWI 1998:
Steering committee
Prof dr ir C.J. van Duijn, CWI, hansd@cwi.nl
Dr ir B.W. van de Fliert, RUL, fliert@wi.leidenuniv.nl
Prof dr P.W. Hemker, CWI, pieth@cwi.nl
Prof dr R.M.M. Mattheij, TUE, mattheij@win.tue.nl
Dr J. Molenaar, TUE, jaapm@win.tue.nl
Coordinators
Prof dr R.J.M.M. Does, UvA, rjmmdoes@wins.uva.nl
Prof dr A. van Harten, UT, a.vanharten@sms.utwente.nl
Drs M.T. de Jong, STW, marijke@stw.nl
Prof dr C.A.J. Klaassen, UvA, chrisk@wins.uva.nl
Drs J. Niessen, STW/NWO, jac@stw.nl, niessen@nwo.nl
Dr ir C Roos, TUD, c.roos@twi.tudelft.nl
Prof dr ir H.C.A. van Tilborg, TUE, henkvt@win.tue.nl
Prof dr ir O.J. Vrieze, U Maastricht, oj.vrieze@math.rulimburg.nl
The Study Group takes the following format:
Monday morning: presentation of the problems by representatives from industry,
Monday afternoon till Thursday: intensive workshop-sessions,
Friday: presentation of the results by the academics.
A report of the results will be distributed among the participants shortly after the meeting.
During the week some expository lectures will be given on applications of mathematics in industry. These will be announced at a later stage. Speakers include Prof. H. Neunzert (University of Kaiserslautern) and Prof. J.H. van Lint (Technical University Eindhoven).
On Monday ECMI will host a reception at the Lorentz Center. On Thursday the Lorentz Colloquium will be held, followed by a reception hosted by the Lorentz Institute.
The Lorentz Center offers adequate offices and lecture rooms for the discussions and the presentations.
Location: Niels Bohrweg 2 in Leiden (next to the Huygens Laboratory)
| Monday 14/9/98 | |
| 10.00-10.15 | Opening |
| 10.15-10.45 | Presentation KPN Research |
| 10.45-11.15 | Presentation NMi |
| 11.15-11.30 | Coffee |
| 11.30-12.00 | Presentation KPN Research |
| 12.00-12.30 | Presentation Trespa |
| 12.30-13.30 | Lunch |
| 13.30-14.00 | Presentation Eldim |
| 14.00-14.30 | Presentation Akzo Nobel |
| 14.30-15.00 | Presentation Dr Daniel den Hoed Kliniek |
| 15.00-15.30 | Tea |
| 15.30-17.30 | Splitting up into groups |
| 17.30-19.00 | ECMI reception |
| Tuesday 15/9/98 | |
| 9.00-17.30 | Discussions/Modelling |
| 13.00-14.00 | Lunch time football game |
| Wednesday 16/9/98 | |
| 9.00-16.00 | Discussions |
| 16.00-17.00 | Colloquium: Prof. Van Lint |
| 17.30-18.30 | Frisbee game |
| Thursday 17/9/98 | |
| 9.00-17.00 | Discussions |
| ATTENTION: change in programme: | |
| 14.00-15.00 | Lorentz Colloquium: Prof. Neunzert |
| 17.00-18.00 | Lorentz reception |
| Friday 18/9/98 | |
| 9.00-9.15 | Opening |
| 9.15-10.45 | Presentations 3 groups |
| 10.45-11.15 | Koffie |
| 11.15-12.45 | Presentations 3 groups |
| 12.45-13.30 | Lunch |
| 13.30-15.00 | Presentations remaining groups |
| 15.00 | Closure and tea |
SWI 1998 News
No news availableCompanies & Problems
Akzo Nobel – Instability in the Spinning of Fibers
Dr Daniel den Hoed Kliniek – Pattern Recognition in CT Scans
Eldim – Laser Percussion Drilling
KPN – ADSL Modems
NMi Van Swinden Laboratorium – The T-factor for a Non Gauss-distribution
Trespa – Pressing of a Corner Profile
Akzo Nobel – Instability in the Spinning of Fibers
A well-known problem in the spinning of fibers by drawing a liquid through a spin hole is that when the speed is increased, there appears an instability in the sense that the cross-section of the filament is no longer independent of time. In fact, oscillations arise at a large speed of spinning. In 1969 MatovichView problem details
Dr Daniel den Hoed Kliniek – Pattern Recognition in CT Scans
When making a diagnosis using a CT scan one looks for spherical shapes amidst bones and lung tissue. Where the bones show a value of 1000 on the CT san and air and lung tissue are at 0, the spheres distinguish themselves at a value of around 150. For the automatic pattern recognition one canView problem details
Eldim – Laser Percussion Drilling
Laser materials processing is well accepted in the industry. Most important applications are cutting, welding and marking. Drilling is a niche application. Only 2% of the system sold is used for drilling. In the gas turbine manufacturing, laser percussion drilling is used to drill film cooling holes. The typical hole diameter is 0.5 to 1.0View problem details
KPN – ADSL Modems
The Transmission Control Protocol (TCP) is a well-used protocol to send information files over the Internet. The essence of this protocol is that the total quantity of information is divided into a number of smaller packages. Sending the data error-free is made possible by detecting the packages in which an error has occurred and resendingView problem details
NMi Van Swinden Laboratorium – The T-factor for a Non Gauss-distribution
For a small sample from a normal or Gauss-distribution, it has been derived by Student with which factor one has to multiply the standard deviation of the sample such that, with a certain probability, the center of the distribution is found in the interval on both sides of the average of the sample, with sizeView problem details
Trespa – Pressing of a Corner Profile
In the fabrication of office desks and plates for walls, Trespa presses thermally layers of paper impregnated with resin. During the heating process (up to 160 degrees at 90 bar) polymerisation of the resin occurs and densification takes place up to 70 per cent. In a related process for the fabrication of wood fibre platesView problem details
SWI 1998 is financially supported by
Annefleur Di Bucchianico 
Jaap Molenaar 
Jan Bouwe van den Berg 
Johann Hurink 
Kees Roos 
Ludolf Meester 
Mark Peletier 
Piet Hemker 
Sjoerd Rienstra