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Guidance to tiinker a small balloon, able to fly by hot air, made from cheap materials.
Complete and easy, for kids from ten years up and adults,
Source: LaTeX-text & pencil drawings, to use as .ps or .pdf -file (to print)
Still only in german.
Excited Energy Levels and Various Shapes (EELViS) was developed for calculation of the Extended Tao-Eldrup model results. The relation between potential well dimensions and positronium (Ps) lifetime can be calculated using this code.