<s>
Micropower	B-Algorithm
describes	O
the	O
use	O
of	O
very	O
small	O
electric	O
generators	O
and	O
prime	O
movers	O
or	O
devices	O
to	O
convert	O
heat	O
or	O
motion	O
to	O
electricity	O
,	O
for	O
use	O
close	O
to	O
the	O
generator	O
.	O
</s>
<s>
The	O
technology	O
holds	O
the	O
promise	O
of	O
ten	O
times	O
the	O
operating	O
time	O
of	O
a	O
battery	O
of	O
the	O
same	O
weight	O
as	O
the	O
micropower	B-Algorithm
unit	O
,	O
and	O
similar	O
efficiency	O
to	O
large	O
utility	O
gas	O
turbines	O
.	O
</s>
<s>
Their	O
goal	O
is	O
to	O
produce	O
20	O
to	O
50	O
watts	O
,	O
sufficient	O
to	O
power	O
a	O
laptop	B-Device
computer	I-Device
.	O
</s>
<s>
The	O
National	O
Academies	O
 '	O
National	O
Research	O
Council	O
recommended	O
in	O
a	O
2004	O
report	O
that	O
the	O
U.S.	O
Army	O
should	O
investigate	O
such	O
micropower	B-Algorithm
sources	O
for	O
powering	O
electronic	O
equipment	O
to	O
be	O
carried	O
by	O
soldiers	O
in	O
the	O
future	O
,	O
since	O
batteries	O
sufficient	O
to	O
power	O
the	O
computers	O
,	O
sensors	O
,	O
and	O
communications	O
devices	O
would	O
add	O
considerable	O
weight	O
to	O
the	O
burden	O
of	O
infantry	B-Protocol
soldiers	O
.	O
</s>
<s>
It	O
would	O
be	O
used	O
to	O
power	O
microelectromechanical	B-Architecture
systems	I-Architecture
,	O
or	O
MEMS	B-Architecture
.	O
</s>
<s>
Arman	O
Hajati	O
and	O
Sang-Gook	O
Kim	O
invented	O
the	O
Ultra	O
Wide-Bandwidth	O
micro-scale	O
piezoelectric	O
energy	O
harvesting	O
device	O
by	O
exploiting	O
the	O
nonlinear	O
stiffness	O
of	O
a	O
doubly	O
clamped	O
microelectromechanical	B-Architecture
systems	I-Architecture
(	O
MEMS	B-Architecture
)	O
resonator	O
.	O
</s>
<s>
Professor	O
Zhong	O
Lin	O
Wang	O
of	O
the	O
Georgia	O
Institute	O
of	O
Technology	O
said	O
his	O
team	O
of	O
investigators	O
had	O
developed	O
a	O
"	O
nanometer-scale	O
generator	O
...	O
based	O
on	O
arrays	O
of	O
vertically	O
aligned	O
zinc	O
oxide	O
nanowires	B-Architecture
that	O
move	O
inside	O
a	O
"	O
zigzag	O
"	O
plate	O
electrode.	O
"	O
</s>
<s>
Per	O
an	O
account	O
of	O
the	O
device	O
which	O
appeared	O
in	O
the	O
journal	O
Science	O
,	O
bending	O
of	O
the	O
zinc	O
oxide	O
nanowire	B-Architecture
arrays	O
produces	O
an	O
electric	O
field	O
by	O
the	O
piezoelectric	O
properties	O
of	O
the	O
material	O
.	O
</s>
<s>
The	O
semiconductor	O
properties	O
of	O
the	O
device	O
create	O
a	O
Schottky	O
barrier	O
with	O
rectifying	B-Algorithm
capabilities	O
.	O
</s>
<s>
A	O
later	O
development	O
was	O
to	O
grow	O
hundreds	O
of	O
such	O
nanowires	B-Architecture
on	O
a	O
substrate	O
that	O
functioned	O
as	O
an	O
electrode	O
.	O
</s>
<s>
On	O
top	O
of	O
this	O
was	O
placed	O
a	O
silicon	O
electrode	O
covered	O
with	O
a	O
series	O
of	O
platinum	B-Operating_System
ridges	O
.	O
</s>
<s>
Goals	O
for	O
further	O
development	O
are	O
to	O
increase	O
the	O
efficiency	O
of	O
the	O
array	O
of	O
nanowires	B-Architecture
,	O
and	O
to	O
increase	O
the	O
lifetime	O
of	O
the	O
device	O
,	O
which	O
as	O
of	O
April	O
2007	O
was	O
only	O
about	O
one	O
hour	O
.	O
</s>
<s>
The	O
windbelt	O
is	O
a	O
micropower	B-Algorithm
technology	O
invented	O
by	O
Shawn	O
Frayne	O
.	O
</s>
<s>
Piezoelectric	O
nanofibers	O
in	O
clothing	O
could	O
generate	O
enough	O
electricity	O
from	O
the	O
wearer	O
's	O
body	O
movements	O
to	O
power	O
small	O
electronic	O
devices	O
,	O
such	O
as	O
iPods	B-Device
or	O
some	O
of	O
the	O
electronic	O
equipment	O
used	O
by	O
soldiers	O
on	O
the	O
battlefield	O
,	O
based	O
on	O
research	O
by	O
University	O
of	O
California	O
,	O
Berkeley	O
Professor	O
Liwei	O
Lin	O
and	O
his	O
team	O
.	O
</s>
<s>
One	O
million	O
such	O
fibers	O
could	O
power	O
an	O
iPod	B-Device
,	O
and	O
would	O
be	O
altogether	O
as	O
large	O
as	O
a	O
grain	O
of	O
sand	O
.	O
</s>
