<s>
Teledeltos	B-Algorithm
paper	O
is	O
an	O
electrically	O
conductive	O
paper	O
.	O
</s>
<s>
Western	O
Union	O
developed	O
Teledeltos	B-Algorithm
paper	O
in	O
the	O
late	O
1940s	O
(	O
several	O
decades	O
after	O
it	O
was	O
already	O
in	O
use	O
for	O
mathematical	O
modelling	O
)	O
for	O
use	O
in	O
spark	O
printer	O
based	O
fax	O
machines	O
and	O
chart	O
recorders	O
.	O
</s>
<s>
Teledeltos	B-Algorithm
paper	O
has	O
several	O
uses	O
within	O
engineering	O
that	O
are	O
far	O
removed	O
from	O
its	O
original	O
use	O
in	O
spark	O
printers	O
.	O
</s>
<s>
Teledeltos	B-Algorithm
provides	O
a	O
sheet	O
of	O
a	O
uniform	O
resistor	O
,	O
with	O
isotropic	O
resistivity	O
in	O
each	O
direction	O
.	O
</s>
<s>
The	O
resistivity	O
of	O
Teledeltos	B-Algorithm
is	O
around	O
6	O
kilohms	O
/	O
square	O
.	O
</s>
<s>
An	O
assumption	O
in	O
some	O
cases	O
is	O
that	O
the	O
surrounding	O
field	O
is	O
'	O
infinite	O
 '	O
,	O
this	O
would	O
also	O
require	O
an	O
infinite	O
sheet	O
of	O
Teledeltos	B-Algorithm
.	O
</s>
<s>
The	O
two	O
basic	O
approaches	O
are	O
to	O
either	O
applying	O
electrodes	O
and	O
a	O
voltage	O
at	O
known	O
points	O
within	O
a	O
large	O
sheet	O
of	O
Teledeltos	B-Algorithm
(	O
modelling	O
an	O
infinite	O
field	O
)	O
or	O
else	O
to	O
cut	O
a	O
shape	O
from	O
Teledeltos	B-Algorithm
and	O
then	O
apply	O
voltages	O
to	O
its	O
edges	O
(	O
modelling	O
a	O
bounded	O
field	O
)	O
.	O
</s>
<s>
Before	O
the	O
use	O
of	O
Teledeltos	B-Algorithm
,	O
a	O
similar	O
technique	O
had	O
been	O
used	O
for	O
modelling	O
gas	O
flows	O
,	O
where	O
a	O
shallow	O
tray	O
of	O
copper	O
sulphate	O
solution	O
was	O
used	O
as	O
the	O
medium	O
,	O
with	O
copper	O
electrodes	O
at	O
each	O
side	O
.	O
</s>
<s>
This	O
has	O
been	O
performed	O
,	O
in	O
a	O
manner	O
analogous	O
to	O
Teledeltos	B-Algorithm
paper	O
,	O
by	O
using	O
volume	O
tanks	O
of	O
a	O
conductive	O
electrolyte	O
.	O
</s>
<s>
The	O
development	O
of	O
computational	B-Application
modelling	I-Application
and	O
finite	B-Application
element	I-Application
analysis	I-Application
has	O
reduced	O
the	O
use	O
of	O
Teledeltos	B-Algorithm
,	O
such	O
that	O
the	O
technique	O
is	O
now	O
obscure	O
and	O
the	O
materials	O
can	O
be	O
hard	O
to	O
obtain	O
.	O
</s>
<s>
Teledeltos	B-Algorithm
can	O
also	O
be	O
used	O
to	O
make	O
sensors	O
,	O
either	O
directly	O
as	O
an	O
embedded	O
resistive	O
element	O
or	O
indirectly	O
,	O
as	O
part	O
of	O
their	O
design	O
process	O
.	O
</s>
<s>
A	O
piece	O
of	O
Teledeltos	B-Algorithm
with	O
conductive	O
electrodes	O
at	O
each	O
end	O
makes	O
a	O
simple	O
resistor	O
.	O
</s>
<s>
A	O
more	O
common	O
resistive	O
sensor	O
is	O
in	O
the	O
form	O
of	O
a	O
potentiometer	B-Device
.	O
</s>
<s>
A	O
similar	O
linear	O
sensor	O
uses	O
two	O
strips	O
of	O
Teledeltos	B-Algorithm
,	O
placed	O
face	O
to	O
face	O
.	O
</s>
<s>
This	O
may	O
be	O
used	O
in	O
similar	O
potentiometric	B-Device
fashion	O
to	O
the	O
conductive	O
probe	O
,	O
but	O
without	O
requiring	O
the	O
special	O
probe	O
.	O
</s>
<s>
If	O
crossed	O
electrodes	O
are	O
used	O
on	O
each	O
piece	O
of	O
Teledeltos	B-Algorithm
,	O
a	O
two-dimensional	O
resistive	O
touchpad	O
may	O
be	O
demonstrated	O
.	O
</s>
<s>
Although	O
Teledeltos	B-Algorithm
is	O
not	O
used	O
to	O
manufacture	O
capacitive	O
sensors	O
,	O
its	O
field	O
modelling	O
abilities	O
also	O
allow	O
it	O
to	O
be	O
used	O
to	O
determine	O
the	O
capacitance	O
of	O
arbitrarily	O
shaped	O
electrodes	O
during	O
sensor	O
design	O
.	O
</s>
