This experiment was performed by Dee Hellmers' 2nd grade class at Hall Kent Elementary School in Homewood, Ala. Seal the two smaller bags filled with ice. Place each inside one of the larger bags.

Space-filling designs such as Latin hypercube designs (LHDs) are widely used in computer experiments. However, finding an optimal LHD with good space-filling properties is computationally cumbersome.

Many of today's scientific processes are simulated using computer-driven mathematical models. But for a model to accurately predict how air flow behaves at high speeds, for example, scientists need ...