September
2000, Amsterdam  Projects 
Finland

Maria
Rantakyla (19)
School: Mattlidends Gymnasium
Hobbies: tennis, skiing, reading
Career intention: engineer 
The use
of Chebyshev's formula in the numerical approximation of definite
integrals
Numerical approximation of definite integrals is an area of
mathematics frequently used in modern computer technology. My
mathematics teacher inspired me and suggested this area. My
essay is about the use of Chebyshev's formula in the numerical
approximation of definite integrals. In particular, it focuses
on presenting the formula, comparing it to two other methods
of numerical integration; the trapezoidal rule and Simpson's
rule. Chebyshev's formula and its connection to Lagrangian interpolation
is explained. The two other methods are briefly presented, and
the three methods are compared on the basis of an example.

Kalle
Salonen (19)
School: Uotilanrinteen lukio
Hobbies: science
Career intention: engineer, chemist or physicist ingenieur
Email: kalle.salonen@pp.nic.fi

Photosynthesis
oxygen production by Elodea Densa
I have been interested in photosynthesis for a long time,
especially to see how plants produce oxygen. My independant
biology course at school gave me an opportunity to carry out
this project.
I have examined the oxygen production of waterplants. For
my research I used Elodea Densa, a South American waterplant.
The volume of oxygen produced by photosynthesis was used as
the basis for the measurement; it can be measured with very
simple equipment. I build the equipment for measuring the
oxygen, changing the light intensity and wavelength myself,
almost completely from parts found at home .
