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(alternative formulea)The goat problem is a special case of calculating the area of the intersection of two circle with radii r and s whoes center points are d apart. When two circle intersect there are four important points, namely the two center points of the circles, and the two intersection points. Lets look at the triangle made of one of the intersection points and the two center points. The sizes of all the sides are known, thus also the angles between them using the cosine rule. The area of the intersection equals the areas of the pies of the two circles minus the area of the triangles. This leads to the following formula:
(follow-up on goat problem,
follow-up on interesting dates)
Of course, the first requirement for programming is knowing the language. But that is the same with painting, knowing how to put paint with a brush on the canvas. For both one has to know the basic techniques, and in both fields there are people who stand far above all the others. In Advanced C++ programming styles and idioms James Coplien states "Style distinguishes excellence from accomplishment". This is true for both art and programming.
There is however one sad thing. Where the work of a painter can be valued by a lay person, the work of a programmer can only be valued by the experts. And yet another sad thing is that there is but only a weak correlation between the observable behaviour of a program, and the style of the code.
The focus for this day was much on behavioural aspects. We had one short lecture explaining an investigation of behavioural aspects of childeren with KS. There are about 15 children joining in this academical study. This study will look into the cognitive abilities, the neuropsycological profile, and language abilities of the children. The "California Child Q-test" and the "Child Behaviour Checklist" will be used. Our son Andy (becoming two in a few weeks) is too young to join the test. Nevertheless, the people performing the research will have a look at him. The aim of the research is to come up with practical advise for the parents, but also a scientifical publication will follow.
After one hour of this, we had an extended lunch, after which we sat together to share about the development of and the problems with our children. This again showed how varied the Kabuki children are, but also some of striking similarities there are. Some children are slim because the eat slow. Others are on a diet because the eat too much. Eating seems to be an important topic for many Kabuki children. Two people reported problems with their child after being exposed to flashing lights. Of course, problems with the ears were discussed. One parent shared their experiences with a cosmetic operation on the ears of their child. Some other parents noted that temporarily stopping/reducing speech therapy can have a positive effect on the speech development.
It was good to come together and have ample time to talk and share. We will definitely go again next year. I realize that it is a blessing to live in a densely populated country. The average travel time for people to attend this day was only two hours.
(Second Dutch Kabuki day and Fourth Dutch Kabuki day)