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2
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ly
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[
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.
T
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Hea
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Or
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with
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I
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2.
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2.
1
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s
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I
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SP
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n
MQ
-
4
m
eth
an
e
s
en
s
o
r
,
an
d
a
DHT
-
2
2
tem
p
e
r
atu
r
e
an
d
h
u
m
id
ity
s
en
s
o
r
f
o
r
m
o
n
ito
r
in
g
th
e
en
v
ir
o
n
m
e
n
tal
co
n
d
itio
n
s
at
a
lan
d
f
ill
.
T
h
e
lo
ca
tio
n
s
o
f
th
e
s
en
s
o
r
r
ea
d
in
g
s
ar
e
d
ep
icted
in
Fig
u
r
e
1.
E
ac
h
s
u
b
s
y
s
tem
is
lo
ca
ted
r
o
u
g
h
l
y
5
m
eter
s
ap
ar
t f
r
o
m
ea
ch
o
t
h
er
.
I
n
Fig
u
r
e
2
it
is
ex
p
lain
ed
th
a
t
t
h
e
o
p
er
atio
n
al
p
r
o
ce
s
s
b
eg
i
n
s
with
th
eI
t
h
as
an
au
to
m
atic
tim
e
tab
le
f
o
r
t
h
e
co
llectio
n
o
f
d
ata
u
n
d
er
th
e
s
y
s
tem
.
W
h
en
tr
i
g
g
er
e
d
,
th
e
MQ
-
4
s
en
s
o
r
d
etec
ts
th
e
co
n
ce
n
tr
atio
n
o
f
m
eth
an
e
g
as
with
in
th
e
lan
d
f
ill
s
ite,
wh
ile
th
e
DHT
-
2
2
s
en
s
o
r
ca
p
tu
r
es
t
h
e
tem
p
er
atu
r
e
a
n
d
h
u
m
id
ity
o
f
th
e
s
ite.
T
h
ese
s
en
s
o
r
s
ca
p
tu
r
e
in
f
o
r
m
atio
n
th
at
is
r
elay
ed
to
th
e
E
SP
3
2
m
icr
o
co
n
tr
o
ller
wh
er
e
th
e
an
alo
g
s
ig
n
als
ar
e
q
u
a
n
tis
ed
.
T
h
e
p
r
o
ce
s
s
ed
d
ata
is
th
en
s
h
o
wn
o
n
an
L
C
D
wh
ich
is
in
s
talled
i
n
th
e
s
y
s
tem
to
g
iv
e
t
h
e
u
s
e
r
f
ee
d
b
ac
k
o
n
wh
at
is
h
ap
p
en
in
g
.
Fu
r
th
er
m
o
r
e,
with
th
e
h
elp
o
f
th
e
b
u
ilt
-
in
W
i
-
Fi ca
p
ab
ilit
y
o
f
th
e
E
SP
3
2
[
3
2
]
,
th
is
d
ata
is
tr
an
s
f
er
r
ed
to
an
o
n
lin
e
s
er
v
er
f
o
r
co
m
p
u
ta
tio
n
an
d
s
to
r
ag
e.
T
h
e
d
ata
is
s
to
r
ed
at
Go
o
g
le
Sp
r
ea
d
s
h
ee
t w
h
er
e
th
e
la
n
d
f
ill
g
as p
a
r
am
eter
s
ar
e
u
p
d
ated
f
r
eq
u
en
tly
a
n
d
th
e
h
is
to
r
ical
d
at
a
ca
n
b
e
ac
ce
s
s
ed
.
Fig
u
r
e
1
.
Sy
s
tem
lo
ca
tio
n
in
B
atu
l
an
d
f
ill
Fig
u
r
e
2
.
Sy
s
tem
f
lo
wc
h
ar
t
Evaluation Warning : The document was created with Spire.PDF for Python.
I
SS
N
:
2
5
0
2
-
4
7
52
In
d
o
n
esian
J
E
lec
E
n
g
&
C
o
m
p
Sci
,
Vo
l.
3
7
,
No
.
1
,
J
an
u
ar
y
20
2
5
:
48
-
55
50
T
h
e
s
ch
em
atic
an
d
s
y
s
tem
a
r
ch
itectu
r
e
is
d
ep
icted
in
F
ig
u
r
e
3
wh
er
e
it
s
h
o
ws
th
at
th
e
s
y
s
tem
co
m
p
r
is
es
o
f
t
h
r
ee
s
u
b
s
y
s
tem
s
th
at
is
s
tr
ateg
ically
lo
ca
ted
at
th
r
ee
d
if
f
er
en
t
p
o
in
t
in
th
e
lan
d
f
ill.
T
h
e
E
SP
3
2
m
icr
o
co
n
tr
o
ller
is
in
teg
r
ated
with
e
ac
h
s
u
b
s
y
s
tem
,
an
d
it
is
ac
co
m
p
an
ied
b
y
an
L
C
D
d
is
p
lay
m
o
d
u
le
f
o
r
u
s
er
p
ar
am
eter
r
esu
lt
o
u
tp
u
t.
T
h
e
s
u
b
s
y
s
tem
s
tr
an
s
m
it
th
eir
s
en
s
o
r
d
ata
to
b
e
d
is
p
lay
ed
th
r
o
u
g
h
Go
o
g
le
Sp
r
ea
d
s
h
ee
t e
m
p
lo
y
in
g
E
SP
3
2
wif
i c
o
n
n
ec
tio
n
.
I
n
s
cien
tific
co
n
tex
t,
th
is
s
y
s
tem
is
an
ex
a
m
p
le
o
f
a
c
o
n
tr
o
l
a
n
d
d
ata
a
cq
u
is
itio
n
s
y
s
tem
ap
p
licab
le
in
au
to
m
atio
n
ap
p
licatio
n
s
in
E
lectr
o
n
ic
E
n
g
in
ee
r
i
n
g
an
d
E
n
v
ir
o
n
m
en
tal
I
n
f
o
r
m
atics.
I
t p
r
o
p
e
r
ly
an
d
ad
eq
u
ately
co
n
tr
o
ls
th
e
em
is
s
io
n
o
f
lan
d
f
ill
g
as,
u
s
es
th
e
m
icr
o
co
n
tr
o
ller
to
p
r
o
ce
s
s
s
ig
n
als
an
d
d
a
ta,
id
en
tifie
s
g
ases
u
s
in
g
th
e
m
eth
an
e
s
en
s
o
r
,
an
d
m
ea
s
u
r
es
en
v
ir
o
n
m
e
n
tal
tem
p
er
atu
r
e
an
d
h
u
m
id
ity
.
T
h
i
s
in
teg
r
ated
s
y
s
tem
g
u
ar
an
tees
th
e
ef
f
icien
t
co
n
tr
o
l
an
d
p
r
o
m
p
t
n
o
tific
atio
n
o
f
th
e
co
n
d
itio
n
o
f
th
e
lan
d
f
ill
s
ites
,
co
n
tr
ib
u
tin
g
to
th
e
s
af
ety
an
d
e
f
f
icien
cy
o
f
th
e
d
ata
co
llected
.
Fig
u
r
e
3
.
Sy
s
tem
ar
c
h
itectu
r
e
2
.
2
.
L
inea
r
re
g
re
s
s
io
n
T
o
d
eter
m
i
n
e
th
e
co
r
r
elatio
n
b
etwe
en
th
e
d
ata
o
b
tain
ed
u
s
in
g
MQ
-
4
an
d
DHT
-
2
2
s
en
s
o
r
s
an
d
th
e
en
v
ir
o
n
m
en
tal
c
o
n
d
itio
n
s
t
h
e
y
r
ec
o
r
d
,
lin
ea
r
r
eg
r
ess
io
n
was
u
s
ed
[
3
3
]
-
[
3
5
]
.
T
h
e
MQ
-
4
s
en
s
o
r
m
ea
s
u
r
es
t
h
e
co
n
ce
n
tr
atio
n
o
f
t
h
e
g
as
p
r
e
s
en
t
in
th
e
en
v
i
r
o
n
m
e
n
t
lik
e
th
e
ca
r
b
o
n
d
i
o
x
id
e
wh
ile
t
h
e
DHT
-
2
2
s
en
s
o
r
m
ea
s
u
r
es
tem
p
er
atu
r
e
a
n
d
h
u
m
id
ity
.
B
ec
au
s
e
th
ese
s
en
s
o
r
s
o
f
f
er
r
aw
v
o
ltag
e
o
u
tp
u
ts
,
it
is
s
ig
n
if
ican
t
to
co
n
v
er
t
th
ese
v
o
ltag
e
lev
els
i
n
to
m
ea
n
in
g
f
u
l
an
d
ac
cu
r
ate
en
v
ir
o
n
m
en
tal
d
ata.
L
in
ea
r
r
e
g
r
ess
io
n
,
th
er
ef
o
r
e
,
en
ab
les o
n
e
to
d
ev
elo
p
th
e
r
i
g
h
t c
alib
r
atio
n
eq
u
atio
n
s
in
o
r
d
er
to
ac
co
m
p
lis
h
th
is
.
L
in
ea
r
r
eg
r
ess
io
n
is
a
p
ar
am
et
r
ic
tech
n
iq
u
e
th
at
tr
ies
to
esta
b
lis
h
th
e
lin
ea
r
r
elatio
n
s
h
ip
b
e
twee
n
o
n
e
o
r
m
o
r
e
in
d
e
p
en
d
e
n
t
v
ar
iab
les
(
e.
g
.
s
en
s
o
r
v
o
ltag
e
r
ea
d
in
g
s
)
an
d
o
n
e
d
ep
e
n
d
en
t
v
ar
iab
le
(
e.
g
.
g
a
s
co
n
ce
n
tr
atio
n
,
tem
p
er
at
u
r
e,
o
r
h
u
m
id
ity
)
with
in
a
d
ataset.
I
n
th
is
s
tu
d
y
,
th
er
e
was
a
co
r
r
el
atio
n
d
o
n
e
b
etwe
en
th
e
s
en
s
o
r
o
u
tp
u
ts
o
f
MQ
-
4
a
n
d
DHT
-
2
2
with
th
e
en
v
ir
o
n
m
e
n
t.
T
h
e
b
asic
co
n
ce
p
t
co
m
p
r
is
es
ass
u
m
in
g
lin
ea
r
eq
u
atio
n
s
th
at
c
o
n
tain
th
e
f
u
n
d
am
en
tals
o
f
t
h
e
o
b
s
er
v
ed
d
a
ta
in
o
r
d
er
to
f
ac
ilit
ate
p
r
ed
ic
tiv
e
m
o
d
elin
g
an
d
in
f
er
en
tial a
n
aly
s
is
.
I
n
its
s
im
p
lest
f
o
r
m
,
a
s
im
p
le
lin
ea
r
r
eg
r
es
s
io
n
m
o
d
el
is
ex
p
r
ess
ed
wit
h
(
1
)
:
=
0
+
1
+
(
1
)
wh
er
e
is
th
e
d
ep
en
d
en
t
v
ar
ia
b
le
(
e.
g
.
,
g
as
co
n
ce
n
tr
atio
n
,
t
em
p
er
atu
r
e,
o
r
h
u
m
i
d
ity
)
,
is
th
e
in
d
ep
en
d
e
n
t
v
ar
iab
le
(
v
o
lta
g
e
r
ea
d
in
g
f
r
o
m
th
e
s
en
s
o
r
)
,
0
is
th
e
in
ter
c
ep
t,
1
is
th
e
s
lo
p
e,
an
d
is
th
e
er
r
o
r
ter
m
.
T
h
e
p
r
im
ar
y
o
b
jectiv
e
in
lin
e
ar
r
eg
r
ess
io
n
is
to
o
p
tim
ize
th
e
p
ar
am
eter
s
0
an
d
1
to
m
in
im
i
ze
th
e
r
esid
u
al
s
u
m
o
f
s
q
u
ar
es.
Evaluation Warning : The document was created with Spire.PDF for Python.
I
n
d
o
n
esian
J
E
lec
E
n
g
&
C
o
m
p
Sci
I
SS
N:
2
5
0
2
-
4
7
52
I
n
tern
et
o
f th
in
g
s
en
a
b
led
l
a
n
d
fill
p
o
llu
tio
n
g
a
s
mo
n
ito
r
in
g
(
Mo
ch
a
mma
d
J
u
n
u
s
)
51
2
.
3
.
Da
t
a
inte
g
rit
y
T
h
e
s
y
s
tem
was
test
ed
f
o
r
3
m
o
n
th
s
,
s
tar
tin
g
f
r
o
m
Ap
r
il
1
st
–
J
u
ly
1
st
2
0
2
4
.
A
d
ata
is
s
a
m
p
led
th
r
ee
tim
es
a
d
ay
at
7
am
,
1
2
p
m
,
a
n
d
5
p
m
.
At
7
am
,
th
e
g
ar
b
a
g
e
co
llectio
n
tr
u
ck
s
ju
s
t
ar
r
iv
e
d
at
th
e
lan
d
f
ill
an
d
d
u
m
p
th
e
lo
a
d
f
o
r
t
h
e
d
a
y
.
At
1
2
p
m
th
e
s
u
n
is
at
its
p
ea
k
,
a
n
d
at
5
p
m
,
th
e
s
u
n
is
s
tar
tin
g
to
s
et.
T
h
e
in
teg
r
ity
o
f
th
e
d
ata
m
ea
n
s
all
d
ata
f
r
o
m
all
th
r
ee
s
u
b
s
y
s
tem
s
m
u
s
t
b
e
r
ec
o
r
d
ed
o
n
th
e
G
o
o
g
le
S
h
e
et.
T
h
er
e
ar
e
9
2
d
ay
s
f
r
o
m
Ap
r
il 1
st
to
J
u
ly
1
st
.
T
h
is
m
ea
n
s
th
e
to
tal
d
ata
ca
n
b
e
ca
l
cu
lated
u
s
in
g
(
2
)
.
=
×
×
(
2
)
w
h
er
e:
: th
e
to
tal
n
u
m
b
er
o
f
d
ata
: to
tal
d
ay
s
: th
e
n
u
m
b
er
o
f
s
u
b
s
y
s
tem
s
d
ep
lo
y
ed
: sam
p
lin
g
n
u
m
b
er
3.
RE
SU
L
T
S AN
D
D
I
SCU
SS
I
O
N
3
.
1
.
Sens
o
r
ca
lib
ra
t
io
n
MQ
-
4
s
en
s
o
r
f
o
r
m
eth
an
e
is
c
alib
r
ated
u
s
in
g
co
m
b
in
atio
n
o
f
two
m
et
h
o
d
s
:
test
in
g
th
e
s
e
n
s
o
r
u
s
in
g
k
n
o
wn
m
eth
an
e
ca
lib
r
atio
n
g
a
s
an
d
u
s
in
g
ca
lib
r
ated
m
eth
an
e
m
ea
s
u
r
in
g
to
o
l.
Fig
u
r
e
4
s
h
o
ws
th
e
r
elatio
n
s
h
ip
b
etwe
en
m
eth
a
n
e
r
ea
d
in
g
o
f
MQ
-
4
s
en
s
o
r
a
n
d
co
n
tr
o
lled
m
eth
an
e
lev
el.
T
h
e
Y
la
b
el
r
e
p
r
esen
ts
MQ
-
4
s
en
s
o
r
r
ea
d
in
g
an
d
th
e
X
ax
is
r
ep
r
e
s
en
ts
th
e
k
n
o
wn
m
eth
an
e
le
v
el
f
r
o
m
ca
lib
r
atio
n
k
it
an
d
o
th
er
m
ea
s
u
r
em
en
t
in
s
tr
u
m
en
t.
T
h
e
ca
lib
r
atio
n
r
esu
lt M
Q
-
4
s
en
s
o
r
is
u
s
in
g
(
3
)
.
=
2
.
0207
+
7
.
2579
(
3
)
DHT
-
2
2
s
en
s
o
r
f
o
r
tem
p
e
r
atu
r
e
an
d
h
u
m
id
ity
is
ca
lib
r
ated
u
s
in
g
a
h
y
g
r
o
m
eter
f
o
r
h
u
m
i
d
ity
an
d
a
tem
p
er
atu
r
e
g
u
n
f
o
r
tem
p
er
at
u
r
e
r
ea
d
in
g
.
T
h
e
test
in
g
f
o
r
t
h
e
tem
p
er
atu
r
e
f
u
n
ctio
n
an
d
h
u
m
id
ity
f
u
n
ctio
n
o
f
DHT
-
2
2
ar
e
d
o
n
e
s
ep
ar
ately
.
Fig
u
r
e
5
s
h
o
ws th
e
r
elatio
n
s
h
i
p
b
etwe
en
th
e
tem
p
er
atu
r
e
r
ea
d
in
g
o
f
th
e
DHT
-
2
2
s
en
s
o
r
an
d
th
e
tem
p
er
at
u
r
e
g
u
n
.
T
h
e
Y
lab
el
r
ep
r
esen
ts
DHT
-
2
2
s
en
s
o
r
r
ea
d
in
g
an
d
th
e
X
ax
is
r
ep
r
esen
ts
th
e
k
n
o
wn
tem
p
e
r
atu
r
e
f
r
o
m
th
e
m
ea
s
u
r
em
en
t in
s
tr
u
m
en
t.
T
h
e
ca
lib
r
atio
n
r
esu
lt f
o
r
DHT
-
2
2
tem
p
er
atu
r
e
r
ea
d
in
g
is
o
b
tain
e
d
in
(
4
)
.
=
1000
94
2
−
3
.
51
(
4
)
Fig
u
r
e
6
s
h
o
ws
th
e
r
elatio
n
s
h
ip
b
etwe
en
h
u
m
id
ity
r
ea
d
in
g
o
f
DHT
-
2
2
s
en
s
o
r
an
d
h
y
g
r
o
m
ete
r
r
ea
d
in
g
.
T
h
e
Y
lab
el
r
e
p
r
esen
ts
DHT
-
2
2
s
en
s
o
r
r
ea
d
in
g
an
d
th
e
X
a
x
is
r
ep
r
esen
ts
th
e
k
n
o
wn
h
u
m
id
ity
f
r
o
m
m
ea
s
u
r
em
en
t in
s
tr
u
m
e
n
t.
T
h
e
ca
lib
r
atio
n
r
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lt f
o
r
DHT
-
2
2
tem
p
er
atu
r
e
r
ea
d
in
g
is
o
b
tain
e
d
in
(
5
)
.
=
1
.
0081
+
0
.
3035
(
5
)
Fig
u
r
e
4
. MQ
-
4
c
alib
r
atio
n
Evaluation Warning : The document was created with Spire.PDF for Python.
I
SS
N
:
2
5
0
2
-
4
7
52
In
d
o
n
esian
J
E
lec
E
n
g
&
C
o
m
p
Sci
,
Vo
l.
3
7
,
No
.
1
,
J
an
u
ar
y
20
2
5
:
48
-
55
52
Fig
u
r
e
5
.
DHT
-
22
tem
p
e
r
atu
r
e
ca
lib
r
atio
n
Fig
u
r
e
6
.
DHT
-
22
h
u
m
id
ity
ca
lib
r
atio
n
3
.
2
.
Da
t
a
inte
g
rit
y
t
est
T
h
e
n
u
m
b
er
o
f
d
ata
co
m
b
in
ed
m
eth
an
e,
tem
p
e
r
atu
r
e,
an
d
h
u
m
id
ity
p
ass
ed
th
r
o
u
g
h
d
u
r
i
n
g
th
e
test
in
g
in
id
ea
l
c
o
n
d
itio
n
is
ca
lcu
late
d
in
(
6
)
.
I
n
id
ea
l
co
n
d
itio
n
,
t
h
e
n
u
m
b
er
o
f
d
ata
co
llected
s
h
o
u
ld
b
e
8
2
8
d
ata
d
iv
id
ed
o
n
th
r
ee
s
u
b
s
y
s
tem
s
.
T
h
ese
d
ata
will b
e
s
to
r
ed
in
G
o
o
g
le
Sp
r
ea
d
s
h
ee
t.
Σ
=
92
×
3
×
3
(
6
)
Σ
=
828
Af
ter
th
r
ee
m
o
n
th
s
o
f
ex
p
er
i
m
en
ts
,
we
o
b
tain
7
8
4
d
ata
s
to
r
ed
in
Go
o
g
le
Sp
r
ea
d
s
h
ee
t.
T
h
is
m
ea
n
s
th
e
ef
f
icien
cy
o
f
th
is
s
y
s
tem
ca
n
b
e
ca
lcu
lated
u
s
in
g
(
7
)
.
T
h
e
o
v
er
all
ef
f
icie
n
c
y
o
f
t
h
e
I
o
T
s
y
s
tem
is
9
4
.
6
%.
T
h
is
m
ea
n
s
in
av
er
a
g
e
ea
ch
s
u
b
s
y
s
tem
lo
s
ts
ar
o
u
n
d
1
4
d
ata
p
o
in
ts
m
o
n
th
l
y
.
=
Σ
×
100%
(
7
)
=
784
828
×
100%
=
94
.
6%
3.
3
.
Da
t
a
c
o
re
la
t
io
n
Af
ter
th
r
ee
m
o
n
th
s
o
f
test
in
g
,
th
e
tr
en
d
s
ca
n
b
e
s
ee
n
in
T
ab
le
1
.
W
e
tak
e
th
e
av
er
ag
e
o
f
ea
ch
test
in
g
tim
e
to
s
ee
th
e
co
r
r
elatio
n
b
e
twee
n
tim
e,
tem
p
er
atu
r
e,
a
n
d
h
u
m
id
ity
in
lan
d
f
il
s
ettin
g
.
Fr
o
m
th
e
d
ata
ab
o
v
e
we
ca
n
g
et
s
ev
er
al
an
g
les.
W
e
ca
n
s
ee
th
at
m
eth
an
e
lev
el
in
th
e
lan
d
f
ill
is
h
ig
h
er
at
1
2
p
m
.
T
h
is
is
6
0
.
3
%
h
ig
h
er
th
a
n
at
7
am
an
d
4
7
.
8
%
h
ig
h
er
th
a
n
at
5
p
m
.
T
h
i
s
f
in
d
in
g
s
co
r
r
elate
with
th
e
tem
p
er
atu
r
e
tr
e
n
d
.
At
h
ig
h
n
o
o
n
,
th
e
av
er
ag
e
te
m
p
er
atu
r
e
is
at
its
p
ea
k
.
T
h
is
m
ea
n
s
tem
p
er
atu
r
e
is
p
r
o
p
o
r
tio
n
al
with
m
et
h
an
e
lev
el,
as
d
ec
o
m
p
o
s
itio
n
r
ate
o
f
th
e
lan
d
f
ill
tr
ash
s
p
ee
d
s
u
p
with
h
ea
t.
B
u
t
r
elativ
e
h
u
m
id
ity
o
n
th
e
o
th
er
h
a
n
d
is
p
er
p
en
d
icu
lar
with
tem
p
er
at
u
r
e.
I
t f
alls
as th
e
tem
p
e
r
atu
r
e
r
is
es.
Evaluation Warning : The document was created with Spire.PDF for Python.
I
n
d
o
n
esian
J
E
lec
E
n
g
&
C
o
m
p
Sci
I
SS
N:
2
5
0
2
-
4
7
52
I
n
tern
et
o
f th
in
g
s
en
a
b
led
l
a
n
d
fill
p
o
llu
tio
n
g
a
s
mo
n
ito
r
in
g
(
Mo
ch
a
mma
d
J
u
n
u
s
)
53
T
ab
le
1
.
Sen
s
o
r
r
ea
d
in
g
d
ata
A
v
e
r
a
g
e
M
e
t
h
a
n
e
(
p
a
r
t
s
p
e
r
mi
l
l
i
o
n
)
Te
mp
e
r
a
t
u
r
e
(
°
C)
H
u
mi
d
i
t
y
(
%)
7
am
2
1
2
0
23
43
12
pm
3
4
0
0
30
32
5
pm
2
3
0
0
25
41
4.
CO
NCLU
SI
O
N
I
n
co
n
cl
u
s
io
n
,
th
is
r
esear
ch
in
tr
o
d
u
ce
s
an
I
o
T
b
ased
lan
d
f
ill
g
as
m
o
n
ito
r
in
g
.
T
h
is
s
y
s
tem
ca
n
tr
an
s
m
it d
ata
f
r
o
m
th
r
ee
p
o
in
t
s
in
a
lan
d
f
ill.
E
ac
h
r
ea
d
in
g
p
o
in
ts
co
n
s
is
ts
o
f
an
E
SP
3
2
as th
e
p
r
o
ce
s
s
o
r
,
MQ
-
4
s
en
s
o
r
to
r
ea
d
m
eth
an
e
lev
el,
an
d
DHT
-
2
2
s
en
s
o
r
to
r
ea
d
e
n
v
ir
o
n
m
en
t
tem
p
er
atu
r
e
an
d
h
u
m
id
ity
.
T
h
er
e
ar
e
th
r
ee
tim
es o
f
r
ea
d
in
g
wh
ich
a
r
e
at
7
am
,
1
2
p
m
,
an
d
5
p
m
.
All th
r
ee
p
o
in
ts
ar
e
co
n
n
ec
ted
v
ia
wif
i w
h
ich
th
en
s
en
d
th
e
d
ata
t
o
b
e
s
to
r
e
d
in
a
Go
o
g
le
Sp
r
ea
d
s
h
ee
t
wh
ich
ca
n
b
e
m
o
n
ito
r
ed
in
r
ea
l
tim
e.
T
h
is
s
y
s
tem
ca
n
ac
h
iev
e
9
4
.
6
%
ef
f
icien
cy
in
d
ata
tr
an
s
m
is
s
io
n
ac
cr
o
s
s
th
r
ee
m
o
n
th
s
o
f
test
in
g
.
Fro
m
th
e
s
tu
d
y
,
we
ca
n
co
n
clu
d
e
th
at
m
eth
a
n
e
lev
el
is
d
i
r
ec
tly
p
r
o
p
o
r
tio
n
al
with
th
e
s
u
r
r
o
u
n
d
in
g
tem
p
er
at
u
r
e.
W
h
en
th
e
s
u
n
is
at
it
s
p
ea
k
at
1
2
p
m
,
t
h
e
tem
p
er
atu
r
e
r
is
es,
as
well
as
th
e
m
eth
an
e
lev
el.
B
u
t th
e
tem
p
er
atu
r
e
is
th
e
in
v
er
s
ely
r
elate
d
to
r
elativ
e
h
u
m
id
ity
.
W
h
en
th
e
tem
p
er
atu
r
e
r
is
es,
th
e
h
u
m
id
ity
f
al
ls
.
Ad
d
itio
n
al
s
tu
d
ies
co
u
ld
f
o
cu
s
o
n
ex
p
an
d
i
n
g
th
e
m
o
n
ito
r
in
g
s
y
s
t
em
to
in
clu
d
e
ad
d
itio
n
al
en
v
ir
o
n
m
en
tal
p
a
r
am
eter
s
,
s
u
ch
as
air
q
u
ality
in
d
ices
an
d
o
th
e
r
g
r
ee
n
h
o
u
s
e
g
ases
.
Mo
r
eo
v
er
,
th
e
m
eth
a
n
e
m
o
n
ito
r
in
g
ca
n
b
e
u
s
ed
to
in
teg
r
atin
g
m
eth
a
n
e
s
to
r
ag
e
f
o
r
r
e
n
ewa
b
le
en
er
g
y
p
u
r
p
o
s
es.
ACK
NO
WL
E
DG
E
M
E
NT
S
T
h
is
r
esear
ch
h
as
b
ee
n
ca
r
r
ied
o
u
t
u
n
d
er
th
e
s
u
p
p
o
r
t
o
f
Hig
h
er
E
d
u
ca
tio
n
,
th
e
Min
is
tr
y
o
f
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d
u
ca
tio
n
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d
C
u
ltu
r
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o
f
I
n
d
o
n
esia
in
2
0
2
4
,
th
r
o
u
g
h
th
e
I
n
n
o
v
atio
n
I
m
p
lem
en
tatio
n
R
esear
ch
s
ch
e
m
e,
th
at
was
f
u
n
d
e
d
b
y
I
n
te
r
n
al
in
d
e
p
en
d
e
n
t b
u
d
g
e
t
State
Po
ly
tech
n
ic
o
f
Ma
lan
g
.
RE
F
E
R
E
NC
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[
1
]
T.
B
.
d
a
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.
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h
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b
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C
.
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.
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r
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smar
,
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.
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.
R
i
g
h
i
,
a
n
d
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.
M
.
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l
b
e
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t
i
,
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To
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r
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n
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o
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rn
e
t
o
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T
h
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o
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rn
a
l
,
v
o
l
.
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n
o
.
1
1
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p
p
.
8
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8
4
,
J
u
n
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2
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o
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[
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3
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(
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55
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tri
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wijay
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c
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,
b
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c
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rd
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c
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id
.
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