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cc
u
r
s
in
t
h
e
lo
ca
l
s
er
v
er
,
s
u
c
h
as
o
v
er
lo
ad
o
n
th
e
s
er
v
er
w
h
i
ch
m
a
k
es
it
is
b
u
s
y
f
o
r
a
lo
n
g
ti
m
e
o
r
m
a
y
h
a
v
e
an
o
t
h
er
er
r
o
r
.
Fau
lt
is
f
o
u
n
d
u
s
in
g
s
el
f
-
c
h
ec
k
i
n
g
p
r
o
ce
s
s
b
ased
o
n
s
o
f
t
w
ar
e
en
g
i
n
ee
r
i
n
g
tec
h
n
iq
u
e.
I
n
t
h
i
s
ca
s
e,
th
e
w
o
r
k
is
co
n
v
er
ted
to
th
e
m
ain
s
er
v
er
in
a
tr
an
s
p
ar
en
t
m
a
n
n
er
f
o
r
th
e
v
i
s
ito
r
to
co
m
p
lete
th
e
s
y
s
t
e
m
w
o
r
k
w
it
h
o
u
t
s
to
p
.
2.
RE
L
AT
E
D
WO
RK
S
T
h
is
s
ec
tio
n
d
etails
t
h
e
r
elate
d
w
o
r
k
ab
o
u
t
m
o
b
ile
ap
p
licatio
n
s
th
at
f
o
cu
s
ed
o
n
in
f
o
r
m
ati
o
n
s
y
s
te
m
s
th
at
u
s
e
t
h
e
Q
R
co
d
e
an
d
th
e
f
au
lt
-
to
ler
an
t
s
y
s
te
m
s
.
I
n
[
9
,
1
0
]
,
th
e
au
t
h
o
r
s
in
tr
o
d
u
ce
d
s
m
a
r
t
g
u
id
e
s
y
s
te
m
s
to
th
e
m
o
b
ile
v
i
s
ito
r
's
p
h
o
n
e,
th
at
ca
n
b
e
u
s
ed
in
s
ev
er
al
en
te
r
p
r
is
es
s
u
c
h
as
co
m
m
er
cia
l,
h
ea
lth
an
d
ed
u
ca
tio
n
in
s
t
itu
tio
n
s
.
T
h
ese
ap
p
licatio
n
s
w
o
r
k
ed
to
r
etr
i
ev
e
f
u
ll
in
f
o
r
m
at
io
n
ab
o
u
t
all
o
f
f
er
ed
ite
m
s
w
it
h
o
u
t
ca
lli
n
g
th
e
h
u
m
an
to
g
et
h
elp
.
T
h
e
r
etr
iev
e
in
f
o
r
m
a
tio
n
w
as
ta
k
e
n
t
w
o
f
o
r
m
ats
:
tex
t
a
n
d
s
o
u
n
d
.
T
h
ese
ap
p
licatio
n
s
s
u
p
p
o
r
ted
s
ev
er
al
lan
g
u
a
g
es
w
h
ich
s
u
itab
le
f
o
r
m
a
n
y
n
atio
n
alitie
s
.
I
f
th
i
s
ap
p
licatio
n
w
a
s
ex
ec
u
ted
in
s
h
o
p
p
in
g
s
u
c
h
a
s
a
m
all,
a
v
ir
tu
al
s
h
o
p
p
in
g
ca
r
t
is
p
r
o
v
id
ed
to
h
elp
th
e
v
i
s
ito
r
i
n
m
o
v
e
m
en
t
i
n
s
id
e
th
e
m
all.
Mo
r
eo
v
er
,
w
h
e
n
t
h
e
v
is
ito
r
d
ec
id
es
to
b
u
y
ite
m
s
,
h
e
ca
n
u
s
e
a
b
an
k
ac
co
u
n
t
to
p
ay
t
h
e
co
s
t.
I
n
[
1
1
]
,
th
e
a
u
t
h
o
r
s
i
n
tr
o
d
u
ce
d
an
i
n
d
o
o
r
lo
ca
lizatio
n
s
y
s
te
m
,
w
h
ic
h
w
a
s
u
s
ed
to
i
m
p
r
o
v
e
t
h
e
v
i
s
ito
r
's
e
x
p
er
ien
ce
at
th
e
m
u
s
e
u
m
.
T
h
e
p
r
o
p
o
s
ed
s
y
s
te
m
d
ep
en
d
ed
o
n
t
h
e
B
l
u
eto
o
th
lo
w
en
e
r
g
y
b
ea
co
n
s
p
r
o
x
i
m
it
y
a
n
d
lo
ca
lizatio
n
ca
p
ab
ilit
ies
to
au
to
m
atica
ll
y
p
r
o
v
id
e
th
e
v
is
ito
r
s
w
i
th
c
u
lt
u
r
al
co
n
ten
t.
I
n
ad
d
itio
n
,
t
h
e
lo
ca
tio
n
o
f
t
h
e
v
is
i
to
r
at
th
e
m
u
s
eu
m
w
as e
s
ti
m
ated
b
ased
o
n
t
h
e
R
SS
tech
n
o
lo
g
y
.
T
h
is
s
y
s
te
m
w
as d
es
ig
n
ed
to
b
e
ea
s
y
to
e
x
ten
d
to
th
e
I
n
ter
n
et
o
f
T
h
i
n
g
s
tec
h
n
o
lo
g
y
a
n
d
its
e
f
f
ec
tiv
e
n
ess
h
a
s
b
ee
n
e
v
al
u
ated
th
r
o
u
g
h
e
x
p
er
ien
ce
.
I
n
[
1
2
]
,
th
e
a
u
t
h
o
r
s
i
n
tr
o
d
u
ce
d
an
a
n
d
r
o
id
m
o
b
ile
ap
p
licati
o
n
u
s
ed
b
y
v
i
s
ito
r
s
o
f
t
h
e
m
u
s
eu
m
to
r
ec
o
g
n
ize
th
e
ar
ticle
w
h
ic
h
v
ie
w
s
i
n
f
o
r
m
atio
n
i
n
an
i
m
a
g
e,
tex
t,
v
id
e
o
o
r
au
d
io
f
o
r
m
at
v
ia
r
ea
d
in
g
QR
co
d
e
th
at
n
ea
r
b
y
th
e
s
ta
tu
e.
T
h
is
ap
p
licatio
n
w
a
s
u
s
ed
to
en
h
an
ce
t
h
e
ab
ilit
ies
o
f
th
e
v
i
s
it
o
r
s
i
n
t
h
e
m
u
s
e
u
m
to
ac
ce
s
s
in
f
o
r
m
atio
n
b
y
s
ca
n
t
h
e
Q
R
t
ag
f
r
o
m
t
h
eir
s
m
ar
t
m
o
b
ile
p
h
o
n
e.
I
t
p
r
o
v
id
ed
g
u
id
a
n
ce
ta
s
k
s
i
n
t
h
e
m
u
s
e
u
m
in
s
tead
o
f
a
h
u
m
a
n
g
u
id
e.
I
n
[
1
3
]
,
th
e
a
u
th
o
r
s
p
r
o
p
o
s
ed
an
a
n
d
r
o
id
m
o
b
ile
ap
p
licatio
n
f
o
r
o
b
j
ec
t
id
en
ti
f
icatio
n
r
elies
o
n
s
ca
n
Q
R
co
d
e.
T
h
is
s
y
s
te
m
w
a
s
d
esi
g
n
ed
f
o
r
id
en
ti
f
icatio
n
m
an
y
o
f
ite
m
s
t
h
at
e
x
i
s
t b
y
th
e
ea
s
ie
s
t
m
eth
o
d
.
T
h
e
p
r
o
p
o
s
ed
s
y
s
te
m
co
n
s
i
s
ts
o
f
a
d
atab
ase,
w
eb
s
er
v
ices
u
s
ed
as
in
te
r
m
ed
iate
to
ac
ce
s
s
th
e
d
atab
ase
an
d
m
o
b
ile
ap
p
licatio
n
f
o
r
th
e
u
s
er
to
r
u
n
it is
o
n
h
is
/h
er
m
o
b
ile
s
m
ar
tp
h
o
n
e
o
r
tab
let
co
m
p
u
ter
s
.
I
n
[
1
4
,
1
5
]
,
th
e
au
th
o
r
s
in
tr
o
d
u
ce
d
a
s
u
r
v
e
y
o
n
f
a
u
lt
to
ler
an
ce
.
E
ac
h
s
y
s
te
m
w
as
ab
le
to
in
ter
ac
ti
v
e
s
af
el
y
w
i
th
u
n
ex
p
ec
ted
f
ail
u
r
es
o
r
f
au
lts
f
r
o
m
h
ar
d
w
ar
e
o
r
s
o
f
t
w
ar
e
ca
lled
f
a
u
lt
to
ler
an
ce
.
T
h
e
f
au
lt
s
m
u
s
t
b
e
ass
es
s
ed
a
n
d
h
a
n
d
led
i
n
a
n
e
f
f
ec
tiv
e
w
a
y
,
f
o
r
ac
h
iev
i
n
g
d
ep
en
d
ab
ilit
y
a
n
d
r
o
b
u
s
tn
e
s
s
i
n
clo
u
d
co
m
p
u
ti
n
g
.
T
h
e
au
th
o
r
s
p
r
o
p
o
s
ed
an
al
g
o
r
ith
m
u
s
i
n
g
ar
tific
ial
n
eu
r
al
n
et
w
o
r
k
(
A
NN)
i
n
o
r
d
er
to
d
etec
t
th
e
f
a
u
lt
s
w
h
ic
h
o
v
er
co
m
e
t
h
e
al
g
o
r
ith
m
s
'
g
a
p
s
an
d
p
r
o
v
id
e
a
m
o
d
el
o
f
f
au
lt
to
ler
a
n
ce
.
I
n
[
1
6
]
,
th
e
au
th
o
r
s
i
n
tr
o
d
u
ce
d
a
s
u
r
v
e
y
ab
o
u
t
v
ar
io
u
s
f
au
l
t
-
t
o
ler
an
ce
m
ec
h
a
n
is
m
s
i
n
t
h
e
d
is
tr
ib
u
ted
s
y
s
te
m
s
,
t
h
at
u
s
ed
t
o
p
r
ev
en
t
m
u
ltip
le
f
ail
u
r
es
o
f
t
h
e
s
y
s
te
m
an
d
in
d
if
f
er
e
n
t
p
o
in
t
s
o
f
f
ail
u
r
e
th
r
o
u
g
h
h
i
g
h
r
ed
u
n
d
a
n
c
y
,
co
n
s
id
e
r
in
g
r
ep
licatio
n
a
n
d
d
is
tr
ib
u
ted
s
er
v
ices
a
v
ailab
ili
t
y
.
I
n
[
1
7
]
,
th
e
a
u
th
o
r
s
p
r
ese
n
ted
t
w
o
tech
n
iq
u
es
f
o
r
p
r
o
v
id
in
g
a
s
y
s
te
m
o
f
f
au
lt
-
to
ler
an
ce
.
T
h
e
f
ir
s
t
tec
h
n
iq
u
e
u
s
ed
r
ed
u
n
d
an
c
y
in
th
e
i
n
f
r
astru
c
tu
r
e
o
f
t
h
e
n
et
w
o
r
k
.
T
h
e
s
ec
o
n
d
,
ad
ap
tiv
e
tech
n
o
lo
g
y
i
s
p
r
o
p
o
s
ed
.
I
n
t
h
e
s
ec
o
n
d
tec
h
n
iq
u
e,
ad
ap
tiv
e
co
m
p
o
n
e
n
t
s
s
u
c
h
a
s
H.
2
6
4
co
d
ec
an
d
(
H.
2
6
5
)
w
er
e
ac
h
ie
v
ed
to
g
u
ar
an
tee
b
etter
p
er
f
o
r
m
an
ce
.
3.
P
RO
P
O
SE
D
SYS
T
E
M
ST
RUCTUR
E
T
h
e
p
r
o
p
o
s
ed
QR
b
ased
i
n
f
o
r
m
atio
n
s
y
s
te
m
f
o
r
p
la
n
ts
s
h
o
p
p
in
g
ce
n
ter
w
i
th
i
n
f
o
r
m
atio
n
m
an
a
g
e
m
e
n
t c
o
n
tai
n
s
f
i
v
e
i
m
p
o
r
tan
t p
ar
ts
f
r
o
m
as
f
o
llo
w
:
QR
co
d
e
ta
g
s
:
it
is
a
t
w
o
-
d
im
en
s
io
n
a
l
f
o
r
m
b
ar
co
d
e,
w
h
i
ch
ca
n
e
n
co
d
e
th
e
lar
g
e
a
m
o
u
n
t
a
n
d
d
if
f
er
en
t
t
y
p
es
o
f
d
ata
[
1
8
]
.
E
asies
t
w
a
y
to
ac
ce
s
s
in
f
o
r
m
atio
n
t
h
at
e
m
b
ed
d
ed
o
n
QR
co
d
e
Qu
ic
k
l
y
b
y
i
n
s
ta
lled
Q
R
s
ca
n
n
er
ap
p
licatio
n
o
n
s
m
ar
t
m
o
b
ile
p
h
o
n
e
s
[
1
9
]
.
T
o
g
en
er
ate
QR
co
d
e,
w
e
ca
n
v
i
s
it
o
n
e
o
f
t
h
e
w
eb
s
ite
s
th
at
av
a
ilab
le
o
n
li
n
e
an
d
d
o
w
n
lo
ad
th
e
co
d
e
as a
j
p
g
i
m
ag
e
f
i
le
an
d
lab
el
o
n
ea
ch
o
f
f
er
ed
ite
m
[
2
0
,
2
1
]
.
Mo
b
ile
A
p
p
licatio
n
:
to
d
esig
n
a
m
o
b
ile
ap
p
licatio
n
to
th
i
s
w
o
r
k
,
t
h
e
A
n
d
r
o
id
Stu
d
io
I
DE
(
I
n
teg
r
ated
Dev
elo
p
m
e
n
t
e
n
v
ir
o
n
m
e
n
t)
3
.
4
.
1
s
o
f
t
w
ar
e
is
u
s
ed
[
2
2
]
.
T
h
is
ap
p
licatio
n
is
d
ev
elo
p
ed
to
th
e
v
i
s
ito
r
'
s
m
o
b
ile
p
h
o
n
e
i
n
o
r
d
er
to
d
ec
o
d
e
th
e
QR
co
d
e,
s
en
d
a
r
eq
u
e
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I
SS
N
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8
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I
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p
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g
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10
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6
,
Decem
b
er
2020
:
6
6
6
4
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6
6
7
2
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2020
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I
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10
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6
,
Decem
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2020
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.
RE
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NC
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S
[1
]
C.
Da
sto
li
,
P
.
Bo
lza
n
,
M
.
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c
h
i
n
i,
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n
d
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l
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o
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ter
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[
2
]
J
.
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.
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,
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.
E
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.
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[3
]
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H.
Ow
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A
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N.
A
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-
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1
.
[4
]
O.
A
l
Ha
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d
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A
.
A
l
He
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si,
M
.
J.
Zem
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d
J.
W
.
P
.
Ng
,
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In
d
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o
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.
IEE
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/W
IC/A
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tel
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l
.
3
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p
p
.
3
3
7
-
3
4
1
,
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1
2
.
[5
]
D.
G
a
v
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las
,
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Ko
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o
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lo
s
,
K.
M
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s,
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n
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.
P
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,
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s
y
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.
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tw.
Co
mp
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0
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.
[6
]
D.
P
a
rra
,
R.
V
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rd
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g
o
,
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.
G
a
rc
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s,
a
n
d
M
.
Nu
ss
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a
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,
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Us
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ma
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p
.
7
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-
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6
.
[7
]
G
.
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e
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a
n
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I.
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te
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.
[8
]
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.
L
io
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,
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.
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l.
3
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p
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8
3
,
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0
1
2
.
[9
]
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m
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d
a
n
d
S
.
A
l
-
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ra
a
w
i,
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sig
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p
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,
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,
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t.
J
.
o
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.
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o
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.
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0
]
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ra
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sig
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,
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a
q
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J
.
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m
p
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t.
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mm
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n
.
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.
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l.
1
9
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.
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p
.
5
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–
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,
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.
[1
1
]
P
.
S
p
a
c
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o
s
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d
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N.
P
lata
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o
ti
s,
“
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E
Be
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.
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.
[1
2
]
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.
P
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ti
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,
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.
S
.
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r,
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.
A
.
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n
e
,
a
n
d
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.
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P
o
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is
,
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m
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rt
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u
id
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rt
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u
se
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m
u
sin
g
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n
d
ro
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,
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n
t.
Res
.
J
.
En
g
.
T
e
c
h
n
o
l.
,
v
o
l.
5
,
n
o
.
2
,
2
0
1
8
.
[1
3
]
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Ja
g
o
d
i,
D.
V
u
ji
,
a
n
d
S
.
Ra
n
,
“
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n
d
ro
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sy
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o
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id
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ts
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n
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e
,
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o
mm
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n
.
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e
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l
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p
p
.
9
2
2
-
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2
5
,
2
0
1
5
.
[1
4
]
Z.
Am
in
,
H.
S
in
g
h
,
a
n
d
N.
S
e
th
i
,
“
Re
v
ie
w
o
n
F
a
u
lt
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e
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c
h
n
iq
u
e
s
in
Clo
u
d
Co
m
p
u
ti
n
g
,
”
In
t.
J
.
Co
mp
u
t.
Ap
p
l
.
,
v
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l.
1
1
6
,
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o
.
1
8
,
p
p
.
1
1
-
1
7
,
2
0
1
5
.
[1
5
]
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.
M
.
H
o
ss
e
in
i
a
n
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.
G
.
A
r
a
n
i,
“
F
a
u
lt
-
T
o
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n
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e
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h
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e
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n
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u
d
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to
ra
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:
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rv
e
y
,
”
In
t.
J
.
Da
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a
b
a
se
T
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ry
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l.
,
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l.
8
,
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o
.
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,
p
p
.
1
8
3
-
1
9
0
,
2
0
1
5
.
[1
6
]
A
.
S
a
ri
a
n
d
M
.
A
k
k
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y
a
,
“
F
a
u
lt
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n
c
e
M
e
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h
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n
ism
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n
Distrib
u
ted
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y
ste
m
s,”
In
t.
J
.
Co
mm
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n
.
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e
tw.
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i.
,
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l.
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8
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o
.
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,
p
p
.
4
7
1
-
4
8
2
,
2
0
1
5
.
[1
7
]
M
.
M
o
n
ica
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M
.
S
a
n
u
si,
a
n
d
A
.
A
d
a
m
u
Y,
“
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a
u
lt
-
T
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e
T
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n
iq
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e
s
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o
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terp
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rk
,
”
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t.
J
.
Ad
v
.
S
c
i.
Res
.
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g
.
,
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l.
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.
1
1
,
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p
.
5
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-
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6
,
2
0
1
9
.
[1
8
]
S.
T
iw
a
ri,
“
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n
in
tro
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o
d
e
tec
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y
,
”
Pro
c
.
1
5
th
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n
t.
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.
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.
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.
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l.
1
,
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p
.
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,
2
0
1
7
.
[1
9
]
K.
Zo
re
n
k
o
,
Ya
ro
sla
v
a
n
d
Ko
se
n
k
o
,
“
T
e
c
h
n
o
lo
g
y
o
f
QR co
d
e
c
re
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ti
o
n
f
o
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in
tera
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o
k
,
”
2
0
1
8
.
[2
0
]
S
.
S
.
Ku
lk
a
rn
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n
d
C.
M
a
lag
i,
“
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a
ti
o
n
a
n
d
A
n
a
l
y
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is
o
f
QR
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o
d
e
,
”
Bo
n
frin
g
In
t.
J
.
S
o
ft
w
.
En
g
.
S
o
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t
Co
mp
u
t.
,
vo
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6
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o
.
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e
,
p
p
.
8
6
-
8
9
,
2
0
1
6
.
[2
1
]
“
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ra
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ó
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ig
o
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ig
o
s QR g
ra
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].
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