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s
e
r
o
o
t
is
n
o
t
k
n
o
w
n
.
T
h
u
s
,
tak
i
n
g
a
p
r
ev
en
ti
v
e
ap
p
r
o
ac
h
is
a
m
o
r
e
v
iab
le
s
o
lu
t
io
n
to
th
e
p
r
o
b
le
m
.
I
n
th
i
s
p
ap
er
,
a
s
i
m
p
le,
m
o
b
i
le
an
d
co
s
t
e
f
f
icien
t
I
n
ter
n
et
o
f
T
h
in
g
s
(
I
o
T
)
b
ased
SB
S
s
y
s
te
m
is
p
r
o
p
o
s
ed
.
T
h
e
s
y
s
te
m
is
b
u
ilt
u
s
in
g
R
asp
b
er
r
y
P
i
m
i
n
ico
m
p
u
ter
th
a
t
w
o
u
ld
t
h
en
b
e
in
te
g
r
ated
w
it
h
a
n
I
o
T
m
id
d
le
w
ar
e.
T
h
e
m
id
d
le
w
ar
e
w
o
u
ld
en
ab
l
e
t
h
e
u
s
er
to
m
o
n
ito
r
p
ar
a
m
eter
s
t
h
at
ar
e
to
b
e
test
ed
.
T
h
r
ee
I
o
T
m
id
d
le
w
ar
e
ar
e
u
s
ed
to
ev
alu
ate
w
h
ich
o
n
e
w
o
r
k
s
b
est
f
o
r
th
e
SB
S
s
y
s
te
m
p
r
o
p
o
s
ed
.
T
h
e
co
m
b
in
atio
n
o
f
r
ec
o
r
d
e
d
s
en
s
o
r
d
ata
w
o
u
ld
th
en
b
e
u
s
ed
to
d
eter
m
i
n
e
w
h
eth
er
o
r
n
o
t
th
e
b
u
ild
in
g
is
c
au
s
i
n
g
SB
S
to
th
e
o
cc
u
p
an
t.
T
h
e
r
est
o
f
th
e
p
ap
er
is
o
r
g
an
ized
as
f
o
llo
w
s
.
Sectio
n
2
d
is
cu
s
s
e
s
o
n
th
e
p
r
o
p
o
s
ed
SB
S
s
y
s
te
m
,
Sectio
n
3
o
n
th
e
I
o
T
m
id
d
le
war
e,
Setio
n
4
is
o
n
r
esu
lt
s
an
d
d
is
cu
s
s
io
n
s
an
d
Sectio
n
5
co
n
clu
d
es t
h
e
f
i
n
d
in
g
s
.
2.
P
RO
P
O
SE
D
SB
S SY
ST
E
M
T
h
e
S
B
S
s
y
s
te
m
is
m
ad
e
o
f
a
s
et
o
f
s
e
n
s
o
r
s
w
it
h
a
p
r
o
ce
s
s
i
n
g
m
o
d
u
le.
R
a
s
p
b
er
r
y
P
i
3
Mo
d
el
B
h
as
b
ee
n
ch
o
s
e
n
a
s
t
h
e
b
r
ai
n
o
f
t
h
e
SB
S
s
y
s
te
m
.
I
t
i
s
ab
le
to
r
e
ad
f
las
h
d
r
i
v
es
w
it
h
t
h
e
e
x
is
ti
n
g
U
n
iv
er
s
al
Ser
ial
B
u
s
p
o
r
t
o
n
b
o
ar
d
.
B
esid
es,
th
e
R
a
s
p
b
er
r
y
P
i
h
as
a
b
u
i
lt
in
W
i
-
Fi
m
o
d
u
le
t
h
at
allo
w
s
it
to
co
n
n
ec
t
to
a
n
et
w
o
r
k
,
m
ak
i
n
g
it s
u
itab
le
ch
o
ice
f
o
r
I
o
T
b
ased
p
r
o
d
u
cts.
T
h
er
e
ar
e
s
o
m
e
SB
S
p
ar
a
m
e
ter
s
th
at
ar
e
n
o
t
m
ea
s
u
r
ab
le
s
u
c
h
as
p
s
y
c
h
o
lo
g
ical
f
ac
to
r
s
w
h
ic
h
i
s
d
if
f
ic
u
lt
to
b
e
m
o
n
ito
r
ed
[
5
]
.
T
h
u
s
,
f
o
r
th
e
s
co
p
e
o
f
t
h
is
p
ap
er
,
n
o
n
-
m
ea
s
u
r
ab
le
p
ar
a
m
eter
s
w
o
u
ld
n
o
t
b
e
tak
en
i
n
to
ac
co
u
n
t
as
p
ar
t
o
f
th
e
m
o
n
ito
r
i
n
g
a
n
d
d
etec
tio
n
s
y
s
te
m
.
Fo
r
p
r
o
o
f
o
f
co
n
ce
p
t,
f
i
v
e
cr
u
cial
p
ar
am
eter
s
ar
e
ch
o
s
en
to
p
r
o
v
id
e
an
a
n
al
y
s
is
o
f
th
e
m
o
n
it
o
r
in
g
an
d
d
etec
tio
n
o
f
SB
S.
T
h
e
p
ar
am
eter
s
ar
e
te
m
p
er
atu
r
e,
h
u
m
id
it
y
,
p
ar
tic
u
lates,
s
o
u
n
d
an
d
lig
h
t.
As
f
o
r
th
e
c
h
o
s
en
p
ar
a
m
eter
s
th
at
ar
e
r
elate
d
to
th
e
th
e
H
ea
tin
g
Ve
n
tila
tio
n
a
n
d
Air
C
o
n
d
itio
n
i
n
g
(
HVAC)
s
y
s
te
m
,
n
o
ti
n
g
t
h
at
air
f
lo
w
i
s
al
s
o
q
u
ite
s
i
g
n
i
f
ic
an
t
to
t
h
i
s
s
u
b
j
ec
t
m
atter
,
y
e
t
it
i
s
n
o
t
ch
o
s
e
n
b
ec
au
s
e
it
is
r
elate
d
to
tem
p
er
atu
r
e
an
d
th
e
h
u
m
id
it
y
.
M
ea
n
in
g
,
if
t
h
er
e
is
a
s
ig
n
i
f
ic
an
t
r
is
e
o
r
d
r
o
p
in
te
m
p
er
atu
r
e
o
r
h
u
m
id
it
y
,
it
w
o
u
ld
b
e
s
a
f
e
to
co
n
c
lu
d
e
t
h
at
th
e
a
ir
f
lo
w
is
th
e
ca
u
s
e
[
6
]
.
A
d
d
in
g
to
t
h
at,
ch
o
o
s
in
g
b
et
w
ee
n
p
ar
ticu
lates
in
t
h
e
a
ir
an
d
t
h
e
air
f
lo
w
,
t
h
e
co
n
ce
n
tr
atio
n
o
f
air
p
ar
ticu
l
ates
o
u
t
w
e
ig
h
s
th
e
co
n
ten
t o
f
air
in
t
h
e
in
b
u
ild
in
g
as p
ar
ticu
late
s
ca
n
ca
u
s
e
m
o
r
e
h
ar
m
.
T
h
er
e
ar
e
m
an
y
s
e
n
s
o
r
s
in
th
e
m
ar
k
et
co
m
p
atib
le
w
it
h
R
asp
b
er
r
y
P
i.
Ho
w
e
v
er
,
its
ac
cu
r
ac
y
,
co
s
t
an
d
f
u
n
ctio
n
al
ities
h
a
v
e
t
o
b
e
co
n
s
id
er
ed
.
DH
T
2
2
is
u
s
ed
to
m
ea
s
u
r
e
t
h
e
te
m
p
er
at
u
r
e
an
d
h
u
m
id
it
y
w
i
th
ac
cu
r
ac
y
o
f
±
2
%
f
o
r
h
u
m
id
it
y
a
n
d
±
0
.
5
0
C
tem
p
er
at
u
r
e.
T
h
e
o
p
ti
m
u
m
w
o
r
k
i
n
g
r
an
g
es
a
r
e
0
-
1
0
0
%
R
H,
-
40
-
80
0
C.
Sh
ar
p
’
s
GP
2
Y1
0
1
0
A
U0
F
Op
tical
Du
s
t
Se
n
s
o
r
i
s
u
s
ed
to
m
ea
s
u
r
e
t
h
e
co
n
te
n
t
o
f
p
ar
ticles
in
a
c
u
b
ic
m
eter
o
f
a
ir
as
it
is
s
en
s
iti
v
e
t
o
f
in
e
air
b
o
r
n
e
p
ar
ticles.
O
n
t
h
e
o
th
er
h
a
n
d
,
Fl
y
in
g
F
is
h
L
i
g
h
t
Se
n
s
o
r
is
c
h
o
s
e
n
to
m
ea
s
u
r
e
t
h
e
li
g
h
t
in
ten
s
it
y
f
r
o
m
t
h
e
e
n
v
ir
o
n
m
e
n
t
w
it
h
in
0
-
2
0
0
0
0
lu
x
.
I
t
is
b
ased
o
n
p
h
o
to
d
io
d
e
w
h
ic
h
i
s
m
o
r
e
r
e
s
p
o
n
s
i
v
e
to
w
ar
d
s
li
g
h
t
.
KY
-
0
3
8
is
u
s
ed
to
m
ea
s
u
r
e
t
h
e
n
o
i
s
e
le
v
el
o
f
th
e
s
u
r
r
o
u
n
d
i
n
g
in
th
e
f
r
eq
u
e
n
c
y
r
an
g
e:
1
0
0
-
1
0
0
0
0
Hz.
Fin
all
y
,
u
s
i
n
g
R
a
s
p
b
er
r
y
P
i
as
th
e
p
r
o
ce
s
s
in
g
u
n
it
w
o
u
ld
r
eq
u
ir
e
an
an
alo
g
to
d
ig
ita
l
co
n
v
er
ter
as,
t
h
e
GP
I
O
p
in
s
o
n
th
e
b
o
a
r
d
s
ar
e
all
d
ig
ita
l
p
in
.
T
h
u
s
,
t
h
e
A
D
S1
1
1
5
w
o
u
ld
b
e
u
s
ed
f
o
r
th
is
co
n
ce
p
t.
T
ak
in
g
in
to
f
ac
t
t
h
at,
lig
h
t
an
d
s
o
u
n
d
s
e
n
s
o
r
s
m
ea
s
u
r
e
th
e
p
ar
a
m
eter
s
in
v
o
ltag
es,
a
w
id
er
b
it
co
n
v
er
s
io
n
w
o
u
ld
allo
w
t
h
e
s
en
s
o
r
d
ata
to
b
e
in
a
m
o
r
e
r
eliab
le
v
o
ltag
e
r
an
g
e.
Me
an
i
n
g
th
at
th
e
u
s
e
o
f
t
h
e
A
D
S1
1
1
5
an
alo
g
to
d
ig
ital
c
o
n
v
er
ter
w
o
u
ld
en
ab
le
a
g
r
ea
ter
r
an
g
e
o
f
s
e
n
s
iti
v
it
y
,
h
e
n
ce
a
b
etter
s
en
s
o
r
r
ea
d
in
g
.
As
f
o
r
th
e
s
o
f
t
w
ar
e,
u
s
i
n
g
P
y
th
o
n
to
m
ea
s
u
r
e,
r
ec
o
r
d
,
an
al
y
ze
an
d
tr
an
s
f
er
th
e
d
ata
w
o
u
ld
b
e
th
e
m
o
s
t
s
u
itab
le
la
n
g
u
a
g
e
to
u
s
e,
as
i
t
i
s
co
m
p
atib
le
w
it
h
t
h
e
R
asp
b
er
r
y
P
i
a
n
d
it
is
also
a
lan
g
u
a
g
e
th
at
is
ea
s
il
y
u
n
d
er
s
to
o
d
,
m
a
k
i
n
g
d
iag
n
o
s
ti
cs
s
i
m
p
ler
.
T
h
e
s
y
s
te
m
w
o
r
k
s
b
y
f
ir
s
t
r
ea
d
in
g
t
h
e
d
ata
f
r
o
m
s
en
s
o
r
s
an
d
u
p
lo
ad
th
e
m
to
Fav
o
r
I
o
T
p
latf
o
r
m
.
T
h
e
SB
S
p
r
o
b
ab
ilit
y
t
h
en
w
i
ll
b
e
ca
lcu
lated
an
d
u
p
lo
ad
ed
b
ac
k
to
th
e
I
o
T
p
latf
o
r
m
.
A
cc
o
r
d
in
g
to
th
e
E
P
A
an
d
s
t
u
d
ies
d
o
n
e
b
y
o
t
h
er
r
esear
ch
er
s
,
th
e
m
o
s
t
o
p
ti
m
a
l
r
o
o
m
te
m
p
er
atu
r
e
is
b
et
w
ee
n
2
0
-
25
0
C
[
7
]
.
I
n
cr
ea
s
e
in
te
m
p
er
atu
r
e
b
e
y
o
n
d
2
5
0
C
is
r
elate
d
to
th
e
in
cr
ea
s
e
in
n
u
m
b
er
o
f
o
cc
u
p
an
t
s
w
h
o
co
m
p
lai
n
o
f
h
ea
d
ac
h
es.
As
f
o
r
th
e
h
u
m
id
it
y
,
co
n
d
itio
n
w
h
er
eb
y
t
h
e
h
u
m
id
it
y
i
s
b
e
y
o
n
d
th
e
r
an
g
e
o
f
3
5
-
6
5
%R
H,
co
u
ld
ca
u
s
e
s
er
io
u
s
h
ea
l
t
h
r
is
k
s
i
f
t
h
e
co
n
d
itio
n
is
p
r
o
lo
n
g
ed
[
8
]
.
Du
s
t
d
en
s
it
y
,
i
s
also
a
n
i
m
p
o
r
tan
t
p
ar
am
eter
w
h
er
e
1
0
0
m
g
/
m
3
o
f
d
u
s
t
d
en
s
it
y
co
u
ld
b
e
v
er
y
d
an
g
er
o
u
s
f
o
r
t
h
e
l
u
n
g
s
a
n
d
co
u
ld
ev
e
n
ca
u
s
e
r
esp
ir
ato
r
y
f
ailu
r
e
i
n
o
cc
u
p
an
t
s
w
ith
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b
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d
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p
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ters
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B:
a
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ti
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T
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rg
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Pro
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ia
.
2
0
1
7
;
1
4
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:
3
3
9
-
3
5
0
.
[1
1
]
F
in
k
DJ
,
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Am
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.
2
0
1
7
;
1
0
7
(1
)
:
4
4
-
4
5
.
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