<s>
In	O
telecommunications	O
and	O
fiber	B-Architecture
optics	I-Architecture
,	O
ovality	B-Device
or	O
noncircularity	B-Device
is	O
the	O
degree	O
of	O
deviation	O
from	O
perfect	O
circularity	O
of	O
the	O
cross	O
section	O
of	O
the	O
core	O
or	O
cladding	O
of	O
the	O
fiber	O
.	O
</s>
<s>
The	O
cross-sections	O
of	O
the	O
core	O
and	O
cladding	O
are	O
assumed	O
to	O
a	O
first	O
approximation	O
to	O
be	O
elliptical	O
,	O
and	O
ovality	B-Device
is	O
defined	O
to	O
be	O
twice	O
the	O
third	O
flattening	O
of	O
the	O
ellipse	O
,	O
,	O
where	O
a	O
is	O
the	O
length	O
of	O
the	O
major	O
axis	O
and	O
b	O
is	O
the	O
length	O
of	O
the	O
minor	O
axis	O
.	O
</s>
<s>
This	O
dimensionless	O
quantity	O
is	O
between	O
and	O
,	O
and	O
may	O
be	O
multiplied	O
by	O
to	O
express	O
ovality	B-Device
as	O
a	O
percentage	O
.	O
</s>
<s>
Alternatively	O
,	O
ovality	B-Device
of	O
the	O
core	O
or	O
cladding	O
may	O
be	O
specified	O
by	O
a	O
tolerance	O
field	O
consisting	O
of	O
two	O
concentric	O
circles	O
,	O
within	O
which	O
the	O
cross	O
section	O
boundaries	O
must	O
lie	O
.	O
</s>
<s>
In	O
measurements	O
,	O
ovality	B-Device
is	O
the	O
amount	O
of	O
out-of-roundness	O
of	O
a	O
hole	O
or	O
cylindrical	O
part	O
in	O
the	O
typical	O
form	O
of	O
an	O
oval	O
.	O
</s>
<s>
In	O
computational	O
chemistry	O
,	O
especially	O
in	O
QSAR	O
studies	O
,	O
ovality	B-Device
refers	O
to	O
,	O
a	O
measure	O
of	O
how	O
the	O
shape	O
of	O
a	O
molecule	O
approaches	O
a	O
sphere	O
(	O
at	O
one	O
extreme	O
)	O
or	O
a	O
cigar	O
shape	O
(	O
at	O
the	O
other	O
)	O
.	O
</s>
<s>
Ovality	B-Device
is	O
described	O
by	O
a	O
ratio	O
of	O
volume	O
to	O
area	O
:	O
</s>
<s>
The	O
ovality	B-Device
of	O
the	O
He	O
atom	O
is	O
1.0	O
and	O
that	O
of	O
HC24H	O
(	O
12	O
triple	O
bonds	O
)	O
is	O
~	O
1.7	O
.	O
</s>
