It is shown that the approximations for maximum bottom-face sheet temperature and areal density
are of high quality.
As an example a laminated armoured glass capable of withstanding a 12.7x99 mm APM2 single shot round has a thickness of 103 mm and an areal density
of 227 kg/m2 while the ArmorLine spinel lowers those figures to 49 mm and 100 kg/m2, in other words by 53% and 56% respectively.
Because one PA6 chain contains only one [NH.sub.2] end function, we could relate the thickness (d) to the areal density
in number of chains per unit area ([SIGMA]):
Summary of systematic corrections and uncertainties (in seconds) for the measured neutron lifetime Source Correction Uncertainty [.sup.6]LiF foil areal density
2.2 [.sup.6]Li cross section 1.2 Alpha detector solid angle 1.0 Solid angle correction for beam +1.5 0.1 distribution LiF target thickness +5.4 0.8 [.sup.6]LiF distribution in target -1.7 0.1 Neutron losses in Si wafer +1.3 0.5 Neutron beam halo -1.0 1.0 Trap nonlinearity (Monte Carlo) -5.3 0.8 Proton backscatter calc.
Because bone mineral density measured by DXA represents the areal density
(grams per square centimeter) rather than the volumetric density (grams per cubic centimeter) of bone, the investigators generated mathematical estimates of volumetric bone density from the DXA measurements of bone mineral content and bone area.
Perpendicular recording allows hard drive manufacturers to put more bits of data on each square inch of disk space-called areal density
or data density--because of magnetic geometry.
There is an egregious editing error stating that DEXA results for bone mineral density (BMD) are reported in g/[cm.sup.3] (BMD is a two-dimensional technology, providing so-called "areal density
", and is reported as g/[cm.sup.2].) Had chapters 6 and 7 preceded chapter 4, it would have been a simple but important addition to provide illustration of BMD changes with therapy.
Making full use of Toshiba's latest advances in HDD technologies, including the highest areal density
yet commercialized, the new HDD delivers 100GB of storage capacity and does so in a drive only 9.5mm high.
The areal density
(amount of data per square inch) of optical storage is limited by the wavelength of light it uses.
When comparing the storage capacity of magnetic HDDs and MO drives, areal density
has to be considered.
The ZX family of drives has an areal density
of 7.04 billion bits per square inch, though IBM has already achieved a figure of 35 billion in the laboratory.
The highest areal density
in today's production drive is about 3 gigabits (3x[10.sup.9]) per square inch. Moreover, since 1990, areal density
has been increasing, on an average, 60% per year.