Emissions of oxides of nitrogen from a small (15 kW) turbine generator burning high fuel bound nitrogen fuels were measured by a chemiluminescence method. Kerosene was used as the base fuel and pyridine was added to achieve different fuel bound nitrogen levels. Mixtures of 0.0%, 0.5%, and 1.0% (by weight)...
The purpose of this research was to study the effect of teachers' written comments on students' homework papers. Fourth, Sixth and ninth grade mathematics classes in Saudi Arabia were selected for the study. The hypotheses for the study stated the following: Teachers' comments significantly increase students' achievement in mathematics. The...