The astronomer Johannes Kepler (1611) studied the packing of mono sized spheres to determine which was the most efficient way of packing in regard to packing densities
The values packing densities
range within 70~92 kg/[m.sup.3] for Printex-U, 75~105 kg/[m.sup.3] for DK4A, 78~118 kg/[m.sup.3] for CB FW200, 88~242 kg/[m.sup.3] for SB 4A, and 160~327 kg/[m.sup.3] for SB 250, respectively.
However, Ulm's nanoindentation experiments (poking a tiny dot of cement paste with an even smaller needle and measuring the resistance), which relate the hardness of a nanoscale unit to its packing density, indicate that C-S-H particle strength occurs on a spectrum, suggesting that there could be more than two packing densities
This power law relation demonstrates that the SERS signals become more sensitive to the molecule surface density at such low packing densities
, from 3 x [10.sup.-13] to 1 x [10.sup.-14] mol/[mm.sup.2], with a molecular coverage from 0.2% to 6%.
The plates can provide high packing densities
of up to 35 cables per plate, for wiring sizes from 3.2 to 6.5 0/D.
The outer diameter of 16 mm leads to higher packing densities
. SnapN connectors (tools are not necessary) can be mated even in the tightest places.
Today's continuous miniaturization of components results in high packing densities
The larger recording surface provided by linear technology drives allows for greater storage capacities in linear products at equivalent data packing densities
. Linear recording technique also allows the scaling of data transfer rate, adding more recording channels in parallel.
The Galaxy G3 Mini Coil is designed to have a random complex shape which may make the coil conformable and enable them to seek and fill open spaces in cerebral aneurysms to achieve higher packing densities
, which have been shown to lower patient retreatment rates.
It is worth mentioning that the aforesaid experiments in the parts 1, 2, and 3 have been accomplished for two packing densities
(77 and 110 [m.sup.2]/[m.sup.3], respectively), since two types of packings are depended.