Abstract In the examples we have considered so far, error introduced by numerical scheme has been O ( ∆t ). This can easily be improved as will show through two simple examples.

SOME time ago an instrument was described in this Journal intended for testing dark-adaptation in -normal and sub-normal patients. However, when it was tried to investigate gross disturbances (e.g., retinitis pigmentosa), the need was felt for a wider range of readings. When re-designing the apparatus provisions were also made to change the colour of the test-light if desired in order to make t...

the operation of a distribution system in the presence of distributed generation systems has someadvantages and challenges. optimal sizing and siting of dg systems has economic, technical, andenvironmental benefits in distribution systems. improper selection of dg systems can reduce theseadvantages or even result in deterioration in the normal operation of the distribution system. dgallocation ...

Though beekeeping is a common farming enterprise and income generating activity in Atsbi Wemberta district, and promotional efforts have been made to improve it, no systematic study has been undertaken to evaluate the promotional efforts and people’s response to it. The objectives of this study were to identify determinants of improved box hive adoption by the beekeepers; and to analyze financi...