regarding the importance of rice fields, as the main mosquito breeding places, use of chemical larvicides has been under consideration in malaria eradication programs. in this trial, oms 786 was used, to study the method and cost of application of this larvicide in the rice fields. two form of larvicides (1% sand granule, and 50% e.c.) were used in four formulations. (10 and 15 kg. of 1% s.g./h...

Spacetime singularities have been discovered which are physically much weaker than those predicted by the classical singularity theorems. Geodesics evolve through them and they only display infinities in the derivatives of their curvature invariants. So far, these singularities have appeared to require rather exotic and unphysical matter for their occurrence. Here we show that a large class of ...

This paper presents research into optimal dispersion models as applied to central places. The literature regarding location optimization and central places is reviewed and the motivation for employing dispersion models is identified. Models that employ the objective of maximal dispersion in the context of central places are formulated and solved in the context of both singleand multiple-good sy...