T
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L
KO
M
NIK
A
, V
ol
.
1
7
,
No.
1
,
F
eb
r
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201
9
, p
p.
1
47
~
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No: 2
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DOI:
10.12928/TE
LK
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N
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Ab
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In
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a
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Copy
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©
2
0
1
9
Uni
v
e
rsi
t
a
s
Ahm
a
d
D
a
hl
a
n.
All
rig
ht
s
r
e
s
e
rve
d
.
1.
Int
r
o
d
u
ctio
n
Cur
r
en
tl
y
,
ac
ad
em
i
c
i
nf
orm
ati
on
no
t
i
f
i
c
ati
o
ns
i
n
c
ol
l
eg
e
are
s
ti
l
l
us
i
n
g
m
ed
i
a
bo
ards
,
ac
ad
em
i
c
po
r
ta
l
s
,
a
nd
s
o
c
i
al
m
ed
i
a.
T
he
us
e
of
b
ul
l
eti
n
bo
ards
i
s
s
ti
l
l
ef
f
ec
ti
v
e
f
or
s
m
al
l
ac
ad
em
i
c
en
v
i
r
on
m
en
ts
,
s
uc
h
as
i
n
s
c
ho
ol
s
.
W
i
th
l
ow
c
os
t,
th
e
ac
a
de
m
i
c
i
nf
orm
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on
de
l
i
v
ere
d
c
an
be
di
r
ec
tl
y
ac
c
ep
t
ed
b
y
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he
s
tud
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nts
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be
c
au
s
e
t
he
nu
m
be
r
of
s
tud
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ts
i
n
s
c
ho
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s
i
s
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ex
i
s
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en
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e
o
f
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t
are
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s
ua
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th
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ut
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ec
ti
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n
c
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ng
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on
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t
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i
nc
r
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s
i
ng
area
a
nd
nu
m
be
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of
ac
ad
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m
i
c
s
tud
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ts
.
O
the
r
m
ed
i
a
us
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d
s
uc
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as
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w
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e
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r
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teri
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t
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s
ed
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group
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i
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ati
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s
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a
y
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i
s
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t
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c
es
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y
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eq
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r
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b
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l
s
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ts
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v
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c
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a.
T
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an
ti
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pa
t
i
o
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t
c
a
n
be
d
on
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s
to
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v
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p
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ev
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f
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ng
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s
f
or
m
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s
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d
on
th
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c
r
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teri
a
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s
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m
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l
arit
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of
i
nf
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r
eq
u
i
r
ed
b
y
the
s
tud
en
ts
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n
ea
c
h
gro
up
.
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u
t
th
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s
i
s
a
l
s
o
l
es
s
ef
f
ec
ti
v
e
be
c
au
s
e
the
op
erator
m
us
t
m
an
ag
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s
om
e
web
pa
ge
s
or
s
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i
a
l
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a
groups
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au
s
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uc
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e
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d
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os
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ne
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ed
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o
d
el
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v
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a
de
m
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c
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nf
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.
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he
c
o
m
pa
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i
s
on
of
the
pe
r
f
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an
c
e
of
bu
l
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b
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ds
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a
de
m
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c
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n c
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i
nf
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, c
an
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e s
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n
Fig
ure
1.
B
as
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on
the
ba
c
k
ground
we
d
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s
c
us
s
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ea
r
l
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em
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at
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s
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ee
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t
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ne
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arc
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propos
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s
o
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eq
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4G
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4.
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F
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A
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f
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y
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f
or
probl
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s
Evaluation Warning : The document was created with Spire.PDF for Python.
IS
S
N: 16
93
-
6
93
0
T
E
L
KO
M
NIK
A
V
ol
.
17
,
No.
1,
F
eb
r
u
ar
y
20
1
9
:
1
4
7
-
1
5
2
148
r
el
ate
d
to
em
ergenc
y
war
ni
ng
[1
-
2],
qu
e
ui
n
g
-
ti
m
e
no
ti
f
i
c
ati
on
s
y
s
tem
s
tha
t
uti
l
i
z
e
data
-
s
en
s
i
ng
[3
],
pe
r
s
on
al
ac
ti
v
i
t
y
m
on
i
tori
ng
[4]
an
d
p
ers
on
al
s
ec
urit
y
trac
k
i
ng
[
5]
. T
he
n t
h
ere i
s
al
s
o
t
he
us
e
of
n
oti
f
i
c
at
i
o
n
s
y
s
tem
s
i
n
th
e
h
ea
l
th
a
r
ea
[6
-
8
],
a
nd
tho
s
e
r
el
ati
ng
t
o
m
ov
i
n
g
ob
j
ec
ts
[9
-
10].
T
hi
s
r
es
ea
r
c
h
i
s
al
s
o
r
e
l
ate
d
to
t
he
s
tud
i
es
w
e
h
av
e
do
n
e
be
f
ore.
I
n
the
pre
v
i
ou
s
s
tud
y
,
we
f
oc
us
ed
on
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de
s
i
g
n
of
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c
no
ti
f
i
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ati
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s
of
tw
are
.
F
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s
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d
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,
th
e
f
oc
us
o
f
r
es
ea
r
c
h
l
i
es
i
n
th
e
de
s
i
gn
of
ac
ad
em
i
c
no
ti
f
i
c
ati
on
s
y
s
tem
arc
hi
tec
ture.
S
om
e
r
e
l
ate
d
r
es
ea
r
c
h
i
s
the
us
e
of
A
nd
r
o
i
d
-
b
as
e
d
no
t
i
f
i
c
ati
o
n
s
y
s
tem
to
an
al
y
z
e
w
i
r
e
l
es
s
ne
t
wor
k
s
er
v
i
c
es
s
uc
h
as
ac
c
es
s
s
pe
ed
an
d
i
n
tern
et
ba
nd
wi
dth
[11
].
A
no
t
h
er
v
er
y
us
ef
ul
s
tu
d
y
i
s
t
he
us
e
of
an
A
nd
r
o
i
d
-
b
as
ed
n
oti
f
i
c
at
i
on
s
y
s
t
em
to
tel
l
the
s
af
es
t
a
nd
f
as
tes
t
r
ou
te
of
t
he
d
i
s
as
ter
area
[1
2].
W
i
th
s
o
m
uc
h
r
es
ea
r
c
h
uti
l
i
z
i
ng
th
e
A
nd
r
o
i
d
-
b
as
ed
no
ti
f
i
c
ati
o
n
s
y
s
t
em
s
ho
w
s
th
e
c
urr
en
t
tr
e
nd
of
tec
hn
o
l
og
y
us
ag
e.
S
o
w
e
as
s
es
s
the
r
es
ea
r
c
h
r
el
at
ed
t
o
t
he
us
e
of
n
oti
f
i
c
at
i
on
s
y
s
tem
ba
s
ed
on
th
e A
nd
r
o
i
d
ga
d
ge
t
i
s
s
ti
l
l
v
er
y
r
el
ev
an
t
.
F
i
gu
r
e
1.
C
urr
en
t s
y
s
t
em
pe
r
f
or
m
an
c
e i
n t
erm
s
of
c
ov
erage
area
an
d
nu
m
be
r
of
s
tud
en
ts
2.
Re
se
a
r
ch
M
e
thod
In
de
s
i
gn
i
ng
n
oti
f
i
c
at
i
on
s
y
s
t
em
arc
hi
tec
ture,
w
e
d
ef
i
ne
t
he
l
og
i
c
a
l
s
tep
s
r
eq
ui
r
ed
to
ac
hi
e
v
e
t
he
s
tat
ed
ob
j
ec
t
i
v
es
.
T
he
s
tep
s
ne
e
de
d
t
o
de
s
i
gn
the
arc
h
i
tec
tur
e
of
the
ac
ad
em
i
c
no
ti
f
i
c
at
i
on
s
y
s
tem
c
an
be
s
ee
n i
n Fi
gu
r
e
2.
Fi
gu
r
e
2.
R
es
ea
r
c
h M
ec
ha
ni
s
m
Evaluation Warning : The document was created with Spire.PDF for Python.
T
E
L
KO
M
NIK
A
IS
S
N: 1
69
3
-
6
93
0
T
he
de
s
i
gn
of
s
m
art no
ti
f
i
c
ati
o
n o
n a
n
droi
d g
ad
g
et
for
ac
ad
em
i
c
...
(
A
gu
s
t
i
n
a He
r
y
ati
)
149
T
he
i
ni
ti
al
ph
as
e
of
the
r
es
ea
r
c
h
s
tarts
w
i
t
h
f
i
nd
i
n
g
a
nd
s
tud
y
i
n
g
r
el
at
ed
r
es
ea
r
c
h
an
d
pu
b
l
i
c
at
i
on
s
tha
t
h
av
e
be
e
n
d
on
e
b
y
oth
er
r
es
ea
r
c
h
ers
.
B
y
c
on
du
c
t
i
ng
a
l
i
tera
ture
s
tu
d
y
,
w
e
ga
i
n
a
n
u
nd
ers
tan
d
i
ng
of
t
he
c
o
nd
i
ti
o
n
of
the
r
es
ea
r
c
h
to
ol
,
th
e
g
ap
tha
t
c
an
b
e
an
op
po
r
tu
ni
t
y
or
ge
t
the
w
e
ak
ne
s
s
of
the
r
es
ea
r
c
h
th
at
h
as
be
en
d
on
e
be
f
ore.
U
nd
ers
ta
nd
i
ng
of
the
c
urr
en
t
s
tat
e
be
c
om
es
v
er
y
i
m
po
r
t
an
t
as
the
s
tarti
n
g
po
s
i
t
i
o
n
of
a
r
es
ea
r
c
h
s
tarted.
In
order
to
ga
i
n
un
de
r
s
ta
nd
i
ng
,
ex
c
el
l
en
c
e,
w
e
ak
ne
s
s
an
d
r
es
ea
r
c
h
op
po
r
t
un
i
ti
es
,
a
r
es
ea
r
c
h
m
e
c
ha
ni
s
m
i
s
ne
ed
ed
.
T
he
an
al
y
s
i
s
i
s
a
m
ec
ha
ni
s
m
tha
t
m
us
t
be
do
ne
to
g
ai
n
an
u
nd
ers
tan
di
ng
of
a
c
o
nd
i
t
i
o
n
or
a
s
y
s
tem
.
T
he
r
es
ul
t
of
the
an
a
l
y
s
i
s
i
s
i
n
t
he
f
or
m
o
f
r
eq
ui
r
em
en
t
an
d
s
pe
c
i
f
i
c
ati
on
of
the
arc
hi
tec
ture
d
es
i
g
n
no
ti
f
i
c
a
ti
on
s
y
s
tem
tha
t
wi
l
l
be
de
v
e
l
op
ed
.
B
y
l
o
ok
i
ng
at
the
r
eq
u
i
r
em
en
ts
an
d
s
p
ec
i
f
i
c
ati
o
n
s
y
s
tem
,
r
es
ea
r
c
he
r
s
c
an
b
eg
i
n
to
de
s
i
gn
th
e
s
y
s
tem
arc
hi
tec
tur
e,
s
tarti
ng
f
r
o
m
ba
s
i
c
arc
hi
tec
t
ure
to
f
i
na
l
a
r
c
hi
tec
ture
r
ea
d
y
t
o
us
e.
T
he
ad
di
t
i
on
of
f
ea
tures
an
d
m
ai
nte
n
an
c
e
proc
es
s
c
an
be
do
n
e c
on
t
i
n
uo
us
l
y
,
i
n
ac
c
ordanc
e
wi
th
the
n
ee
ds
of
th
e s
y
s
tem
an
d e
n
d
-
us
ers
.
3.
P
r
o
p
o
se
d
D
es
ign
T
he
m
ai
n
probl
em
f
ac
ed
by
the
s
er
v
i
c
e
pro
v
i
de
r
of
a
c
ad
em
i
c
i
nf
or
m
ati
on
no
t
i
f
i
c
ati
o
n
i
n
c
ol
l
e
ge
i
s
w
h
eth
er
the
a
c
a
de
m
i
c
i
nf
or
m
ati
on
s
en
t
c
an
r
ea
c
h
the
s
tu
de
nts
w
h
o
ne
ed
i
t
or
v
i
c
e
v
ers
a?
T
he
ac
c
urac
y
of
the
de
l
i
v
er
y
of
ac
ad
em
i
c
i
nf
orm
ati
on
to
s
tud
en
ts
w
h
o
n
e
ed
i
t
i
s
s
tr
on
g
l
y
i
nf
l
ue
nc
ed
b
y
the
m
ed
i
a u
s
ed
b
y
no
t
i
f
i
c
ati
o
n s
erv
i
c
e
prov
i
de
r
s
i
n t
he
c
o
l
l
eg
e.
T
o o
v
erc
om
e t
he
s
e
probl
em
s
,
w
hi
l
e
m
ai
nta
i
n
i
n
g
the
c
ov
erage
th
at
c
an
b
e
c
ov
ered
whi
c
h
i
m
pa
c
t
o
n
the
ti
m
e
an
d
c
os
t
r
eq
ui
r
e
d,
w
e
tr
y
to
m
ak
e
the
ba
s
i
c
arc
hi
tec
t
ure
of
ac
ad
em
i
c
no
ti
f
i
c
ati
on
s
y
s
t
em
.
T
o
de
s
i
gn
the
arc
h
i
tec
tur
e
of
ac
ad
em
i
c
no
ti
f
i
c
at
i
on
s
y
s
tem
r
eq
ui
r
es
an
un
d
e
r
s
tan
d
i
n
g
of
the
de
v
i
c
e
or
th
e
c
o
m
po
ne
nt
of
ac
ad
em
i
c
no
ti
f
i
c
at
i
on
s
y
s
t
em
arc
hi
tec
ture.
T
he
c
om
po
ne
nts
of
the
ba
s
i
c
arc
hi
tec
ture
of
ac
ad
em
i
c
no
ti
f
i
c
ati
on
s
y
s
t
em
are as
T
a
bl
e
1
.
T
ab
l
e 1
.
B
as
i
c
A
r
c
hi
t
ec
ture
Com
po
ne
nts
C
o
m
p
o
n
e
n
t
s
Fun
c
t
ion
A
p
p
b
a
c
k
-
end
The
b
a
c
k
-
e
n
d
a
p
p
i
s
u
s
u
a
ll
y
a
d
a
t
a
b
a
s
e
c
o
n
t
a
ine
d
o
n
a
c
o
ll
e
g
e
s
e
r
v
e
r
.
C
o
n
t
r
o
ll
e
d
a
n
d
m
o
n
i
t
o
r
e
d
b
y
c
o
ll
e
g
e
a
d
mi
n
s
a
n
d
o
p
e
r
a
t
o
r
s
,
c
a
n
s
e
n
d
a
n
d
man
a
g
e
a
c
a
d
e
m
i
c
n
o
t
if
i
c
a
t
ion
s
y
s
t
e
ms
,
h
a
v
e
a
u
t
h
o
r
iz
e
t
o
v
iew
,
a
d
d
o
r
r
e
m
o
v
e
s
t
u
d
e
n
t
s
.
C
lou
d
(
I
n
t
e
r
n
e
t
)
An
o
p
e
r
a
t
o
r
t
h
a
t
p
r
o
v
ide
s
s
e
r
v
i
c
e
n
o
t
if
i
c
a
t
ion
s
y
s
t
e
m,
in
a
c
c
o
r
d
a
n
c
e
w
it
h
t
h
e
o
p
e
r
a
t
ing
s
y
s
t
e
m
u
s
e
d
b
y
t
h
e
s
t
u
d
e
n
t
.
On
e
o
f
t
h
e
m
i
s
Fire
b
a
s
e
C
lou
d
M
e
s
s
a
g
ing
[
1
3
]
.
R
e
c
e
iv
e
a
n
o
t
if
i
c
a
t
ion
r
e
g
is
t
r
a
t
ion
s
e
r
v
ic
e
a
n
d
f
o
r
w
a
r
d
it
t
o
t
h
e
b
a
c
k
-
e
n
d
a
p
p
.
M
o
b
il
e
D
e
v
ic
e
P
la
t
f
o
r
m
The
d
e
v
ic
e
u
s
e
d
t
o
b
r
o
a
d
c
a
s
t
a
c
a
d
e
m
i
c
n
o
t
i
f
ic
a
t
ion
.
A
n
d
r
o
id
Ga
d
g
e
t
The
d
e
v
ic
e
u
s
e
d
t
o
r
e
c
e
iv
e
a
c
a
d
e
mi
c
n
o
t
i
f
i
c
a
t
ion
m
e
s
s
a
g
e
s
s
e
n
t
b
y
t
h
e
o
p
e
r
a
t
o
r
.
A
f
ter
k
no
w
i
n
g
an
d
un
d
ers
tan
d
i
ng
t
he
r
eq
ui
r
e
d
c
om
p
on
en
ts
,
we
s
tarted
t
o
de
s
i
gn
the
ba
s
i
c
arc
hi
t
ec
ture
of
the
ac
ad
em
i
c
no
ti
f
i
c
at
i
on
s
y
s
tem
.
S
o
ba
s
ed
on
t
he
de
s
i
g
n
r
e
s
ul
ts
ob
t
ai
ne
d
ba
s
i
c
arc
h
i
tec
ture
as
i
n
F
i
gu
r
e
3,
b
as
i
c
arc
h
i
tec
tur
e
c
on
s
i
s
ts
of
ba
c
k
-
en
d
ap
ps
i
n
th
e
f
orm
o
f
da
ta
ba
s
es
,
m
ob
i
l
e
de
v
i
c
e
pl
a
tf
or
m
s
,
the
c
l
ou
d
or
Int
erne
t,
a
nd
A
n
droi
d
-
ga
d
ge
ts
,
s
uc
h
as
s
m
artpho
ne
s
, s
m
art
-
gl
as
s
, ta
bl
et
pc
,
ne
t
bo
ok
or s
m
artwatc
h.
T
he
f
l
ow
of
ac
ad
em
i
c
no
ti
f
i
c
ati
on
s
erv
i
c
es
tha
t
c
on
tai
n
ed
i
n
th
e
ba
s
i
c
arc
hi
t
ec
ture
,
f
i
r
s
t
,
s
tud
en
ts
r
e
gi
s
t
er
ac
ad
em
i
c
no
ti
f
i
c
at
i
on
s
erv
i
c
e
t
hrou
gh
g
ad
g
et
de
v
i
c
e
to
no
t
i
f
i
c
ati
on
s
erv
i
c
e
prov
i
de
r
(
c
l
ou
d).
Noti
f
i
c
at
i
o
n
s
erv
i
c
e
he
r
e
i
s
s
ti
l
l
ge
n
eral
.
T
he
n,
no
t
i
f
i
c
ati
o
n
s
erv
i
c
e
pro
v
i
de
r
s
f
orw
ard
i
t
t
o
th
e
b
ac
k
-
en
d
s
erv
er,
f
or
ap
pr
ov
al
an
d
a
dd
ed
to
t
he
ac
ad
em
i
c
no
t
i
f
i
c
ati
on
s
y
s
t
e
m
da
ta
ba
s
e
i
n
the
c
o
l
l
e
ge
.
S
t
ud
en
t
da
t
a
s
torage
i
s
ba
s
e
d
o
n
un
i
q
ue
ID,
whi
c
h
d
i
f
f
er
en
ti
ate
s
i
t
f
r
o
m
oth
er
s
tu
de
n
ts
.
A
f
ter
th
e
s
t
orage
proc
es
s
i
s
c
om
pl
ete
,
the
ba
c
k
-
en
d
ap
p
c
on
t
i
n
u
es
to
f
or
w
ard
the
s
erv
i
c
e
c
on
f
i
r
m
ati
on
throug
h
the
n
oti
f
i
c
at
i
on
s
e
r
v
i
c
e
pro
v
i
de
r
.
T
o
s
en
d
no
ti
f
i
c
at
i
on
of
c
on
f
i
r
m
ati
on
an
d
ac
a
de
m
i
c
i
nf
orm
ati
on
,
n
oti
f
i
c
at
i
o
n
s
erv
i
c
e
pro
v
i
d
ers
us
e
the
Mo
b
i
l
e
D
ev
i
c
e
P
l
a
tf
or
m
.
Mo
bi
l
e
De
v
i
c
e
P
l
atf
or
m
s
en
ds
ac
ad
em
i
c
c
on
f
i
r
m
ati
on
a
nd
no
t
i
f
i
c
ati
o
n
m
e
s
s
ag
es
to
s
tud
en
ts
.
S
o
i
f
the
r
e
are
m
an
y
s
t
ud
e
nts
w
h
o
do
the
r
eg
i
s
tr
at
i
o
n
at
t
he
s
am
e
ti
m
e,
c
on
f
i
r
m
ati
on
m
e
s
s
ag
es
c
an
be
broadc
a
s
t
s
i
m
ul
tan
e
ou
s
l
y
.
S
t
ud
e
nts
r
ec
ei
v
e
c
on
f
i
r
m
ati
on
m
es
s
ag
es
,
to
o
bta
i
n
ac
ad
em
i
c
i
nf
or
m
ati
on
no
t
i
f
i
c
ati
on
s
erv
i
c
e.
B
as
i
c
arc
h
i
tec
ture
c
a
n
b
e
us
ed
f
or
s
y
s
t
em
no
ti
f
i
c
ati
o
n
w
i
t
h
a
s
m
al
l
nu
m
be
r
of
ga
dg
et
de
v
i
c
es
b
ec
au
s
e
the
ba
s
i
c
arc
hi
tec
ture
ha
s
s
om
e
l
i
m
i
tat
i
o
ns
to
ac
c
om
m
od
ate
a
l
arge
nu
m
be
r
o
f
ga
dg
et
de
v
i
c
es
.
S
om
e
c
on
d
i
ti
on
s
tha
t
m
us
t
be
ful
f
i
l
l
ed
i
s
th
e
ga
d
ge
t
de
v
i
c
e
m
us
t
be
ho
m
og
en
eo
us
,
be
c
a
us
e
i
f
the
r
e
are
s
e
v
era
l
d
i
f
f
erent
t
y
pe
s
of
d
ev
i
c
es
,
th
en
the
n
oti
f
i
c
at
i
on
Evaluation Warning : The document was created with Spire.PDF for Python.
IS
S
N: 16
93
-
6
93
0
T
E
L
KO
M
NIK
A
V
ol
.
17
,
No.
1,
F
eb
r
u
ar
y
20
1
9
:
1
4
7
-
1
5
2
150
m
e
s
s
ag
e
de
l
i
v
er
y
s
h
ou
l
d
b
e
d
on
e
i
n
s
e
v
era
l
t
i
m
es
,
an
d
t
hi
s
i
s
n
ot
ef
f
ec
ti
v
e.
Ne
ed
m
uc
h
ti
m
e
an
d
ef
f
ort
j
us
t
to
s
en
d
an
ac
ad
em
i
c
no
ti
f
i
c
at
i
on
m
es
s
ag
e.
B
as
i
c
arc
hi
tec
t
ure
de
s
i
gn
i
s
ne
e
de
d
as
a
f
i
r
s
t
s
tep
to
m
a
k
i
ng
b
e
tte
r
arc
hi
tec
ture,
i
n
oth
er
wor
ds
,
to
m
a
k
e
s
y
s
tem
i
nt
eg
r
ate
d,
w
e
ha
v
e
to
m
ak
e
s
m
al
l
er
s
ub
s
y
s
tem
f
i
r
s
t
[14
].
T
o
ov
erc
o
m
e
the
l
i
m
i
tat
i
o
ns
of
ba
s
i
c
arc
hi
tec
ture,
we
tr
y
to
propos
e
be
tte
r
arc
hi
t
ec
tur
al
de
s
i
gn
s
b
y
i
nv
ol
v
i
ng
s
o
m
e
ad
di
t
i
on
al
c
om
po
ne
nts
,
as
s
ho
w
n
i
n
F
i
gu
r
e
4.
O
n
the
on
e
h
an
d,
th
e
ad
di
t
i
o
n
of
c
om
po
ne
nts
w
i
l
l
ad
d
to
the
c
os
ts
i
nc
urr
ed
,
bu
t
ef
f
i
c
i
en
t
w
he
n u
s
ed
to
broa
dc
as
t a
c
ad
em
i
c
no
t
i
f
i
c
ati
o
n
m
es
s
ag
es
.
F
i
gu
r
e
3.
B
as
i
c
a
r
c
h
i
tec
ture
F
i
gu
r
e
4.
T
he
ad
v
an
c
ed
arc
hi
tec
t
ure
Evaluation Warning : The document was created with Spire.PDF for Python.
T
E
L
KO
M
NIK
A
IS
S
N: 1
69
3
-
6
93
0
T
he
de
s
i
gn
of
s
m
art no
ti
f
i
c
ati
o
n o
n a
n
droi
d g
ad
g
et
for
ac
ad
em
i
c
...
(
A
gu
s
t
i
n
a He
r
y
ati
)
151
T
he
r
e
are
ad
di
ti
o
na
l
c
om
po
ne
nts
i
n
the
a
dv
an
c
ed
arc
hi
tec
ture
de
s
i
gn
,
wi
th
t
he
f
ol
l
o
w
i
n
g
f
un
c
ti
on
s
as
s
ho
w
n
i
n
T
ab
l
e
2
.
Ho
wev
er,
the
pres
en
c
e
of
hu
bs
an
d
c
o
nn
ec
te
d
g
ad
ge
t
de
v
i
c
es
c
an
be
op
t
i
on
al
,
de
p
en
d
i
n
g
on
th
e
ne
ed
s
a
nd
c
on
di
t
i
o
ns
i
n
th
e
c
ol
l
e
ge
.
F
o
r
a
c
ol
l
eg
e
wi
th
a
v
er
y
l
arge
nu
m
be
r
of
s
tud
en
ts
,
the
n
th
e
us
e
of
hu
bs
wi
l
l
b
e
v
er
y
he
l
pf
ul
.
B
ut
f
or
c
ol
l
e
ge
s
tha
t
h
a
v
e
f
ew
s
tu
de
nts
wi
t
h
h
om
og
en
eo
us
ga
d
ge
t
de
v
i
c
es
,
the
us
e
of
hu
bs
c
an
be
was
te
.
A
s
m
ore
an
d
m
ore de
v
i
c
es
are c
o
nn
ec
t
e
d,
th
e g
r
ea
ter th
e o
pe
r
at
i
on
al
c
os
ts
r
eq
u
i
r
ed
f
or
m
ai
nte
na
nc
e.
T
ab
l
e 2
.
A
d
v
a
nc
ed
A
r
c
hi
tec
ture Com
po
ne
n
ts
C
o
m
p
o
n
e
n
t
s
Fun
c
t
ion
S
e
c
u
r
e
-
l
in
k
S
e
c
u
r
e
-
L
ink
e
n
s
u
r
e
s
d
a
t
a
t
r
a
f
f
i
c
c
o
n
t
a
in
leg
it
i
mat
e
inf
o
r
m
a
t
ion
.
N
o
t
f
r
o
m
a
t
h
ird
p
a
r
t
y
w
h
o
s
p
r
e
a
d
s
h
o
a
x
e
s
,
a
d
v
e
r
t
is
e
men
t
s
,
o
r
s
p
a
m.
B
e
c
a
u
s
e
t
h
e
I
n
t
e
r
n
e
t
i
s
a
r
e
a
l
m
w
h
e
r
e
t
h
e
r
e
is
a
lw
a
y
s
a
g
a
p
f
o
r
c
r
i
m
ina
l
a
c
t
ion
,
t
h
e
r
e
f
o
r
e
s
e
c
u
r
e
-
li
n
k
s
m
u
s
t
a
lw
a
y
s
b
e
a
c
t
iv
e
.
S
e
c
u
r
e
-
li
n
k
m
a
y
b
e
a
f
ire
w
a
ll
o
r
o
t
h
e
r
s
e
c
u
r
i
t
y
m
e
t
h
o
d
s
t
h
a
t
c
a
n
d
e
t
e
c
t
n
o
n
-
leg
it
i
m
a
t
e
inf
o
r
m
a
t
ion
,
a
s
w
e
d
id
in
o
u
r
p
r
e
v
iou
s
r
e
s
e
a
r
c
h
[
1
5
]
.
H
ub
W
h
e
n
t
h
e
o
p
e
r
a
t
ing
s
y
s
t
e
m
o
f
c
o
n
n
e
c
t
e
d
d
e
v
ic
e
s
d
o
e
s
n
o
t
c
o
m
e
f
r
o
m
a
s
ing
le
v
e
n
d
o
r
it
n
e
e
d
s
a
h
u
b
a
s
a
m
e
d
iu
m
t
h
a
t
c
a
n
t
r
a
n
s
la
t
e
n
o
t
if
i
c
a
t
ion
m
e
s
s
a
g
e
s
f
r
o
m
mob
il
e
p
lat
f
o
r
ms
.
S
o
n
o
t
i
f
i
c
a
t
ion
m
e
s
s
a
g
e
s
c
a
n
b
e
r
e
c
o
g
n
iz
e
d
b
y
v
a
r
iou
s
c
o
n
n
e
c
t
e
d
d
e
v
ic
e
s
.
B
e
c
a
u
s
e
u
s
u
a
ll
y
in
a
c
o
ll
e
g
e
,
t
h
e
s
t
u
d
e
n
t
s
u
s
e
g
a
d
g
e
t
d
e
v
i
c
e
s
f
r
o
m
v
a
r
iou
s
v
e
n
d
o
r
s
.
W
i
t
h
o
u
t
a
h
u
b
,
it
t
a
k
e
s
o
n
e
m
o
b
i
le
p
lat
f
o
r
m
f
o
r
o
n
e
t
y
p
e
o
f
g
a
d
g
e
t
d
e
v
ic
e
,
i
f
t
h
e
r
e
a
r
e
5
t
y
p
e
s
o
f
g
a
d
g
e
t
d
e
v
ic
e
s
,
t
h
e
n
it
t
a
k
e
s
5
d
if
f
e
r
e
n
t
t
y
p
e
s
o
f
m
o
b
i
le
p
lat
f
o
r
ms
,
a
n
d
t
h
i
s
b
e
c
o
mes
ine
f
f
e
c
t
iv
e
.
The
e
x
is
t
e
n
c
e
o
f
h
u
b
s
in
a
d
v
a
n
c
e
d
a
r
c
h
i
t
e
c
t
u
r
e
c
a
n
o
v
e
r
c
o
m
e
t
h
e
li
mi
t
a
t
ion
s
o
f
e
x
is
t
ing
m
o
b
il
e
p
lat
f
o
r
m
d
e
v
ic
e
s
.
4.
Re
sult
s
a
nd
D
isc
u
s
sio
n
Nex
t,
w
e
pe
r
f
orm
a
s
i
m
pl
e
c
al
c
ul
ati
on
s
i
m
ul
ati
o
n
t
o
f
i
nd
o
ut
t
he
prop
os
ed
arc
hi
t
ec
tural
de
s
i
g
n p
erf
orm
an
c
e,
the
r
e
s
ul
t i
s
as
s
ho
w
n
i
n
F
i
g
ure 5
.
F
i
gu
r
e
5.
1
0
-
f
ol
d c
a
l
c
ul
a
ti
n
g
W
e
s
i
m
ul
ate
the
p
erf
or
m
an
c
e
of
the
no
ti
f
i
c
ati
o
n
s
y
s
t
e
m
arc
hi
tec
ture
ba
s
ed
on
th
e
c
os
t
r
eq
ui
r
e
d
to
pe
r
f
orm
a
s
i
ng
l
e
broa
dc
as
t
f
or
a
no
ti
f
i
c
ati
on
m
es
s
ag
e.
T
he
c
al
c
ul
ati
on
i
s
do
n
e
as
m
u
c
h
as
10
-
fol
d
f
or
the
r
el
e
v
a
nt
r
es
ul
t,
b
y
c
h
oo
s
i
n
g
the
v
a
l
u
e
of
ea
c
h
v
aria
bl
e
at
r
an
do
m
.
V
ari
ab
l
es
us
ed
i
n
th
e
c
a
l
c
u
l
at
i
on
are
t
he
nu
m
be
r
of
ga
dg
et,
nu
m
be
r
of
m
es
s
ag
es
,
an
d
c
os
t
pe
r
m
e
s
s
ag
e.
T
he
c
al
c
ul
at
i
o
n
r
es
ul
ts
s
ho
w
t
he
to
tal
c
os
t
r
eq
u
i
r
ed
to
pe
r
f
orm
a
on
e
-
ti
m
e
de
l
i
v
er
y
of
ac
ad
em
i
c
no
ti
f
i
c
at
i
on
m
es
s
ag
es
on
a
dv
an
c
ed
arc
hi
tec
ture
m
ore
ef
f
i
c
i
en
t
th
an
ba
s
i
c
arc
hi
tec
ture
.
A
s
th
e
n
um
be
r
of
ga
d
ge
t
w
i
t
h
di
f
f
erent
t
y
p
es
of
ga
dg
ets
i
nc
r
e
as
es
,
the
pro
po
s
ed
arc
hi
tec
ture
c
an
s
ti
l
l
r
ed
uc
e
th
e c
os
ts
r
eq
ui
r
e
d t
o
broa
d
c
as
t th
e a
c
a
de
m
i
c
no
ti
f
i
c
at
i
on
m
es
s
ag
e.
W
e
us
e
v
a
l
ue
s
f
or
v
aria
bl
e
s
tha
t
are
r
an
do
m
l
y
s
e
l
ec
t
ed
f
or
ea
c
h
tes
t.
A
s
i
n
t
he
f
i
r
s
t
to
10
th
s
i
m
ul
ati
on
,
wi
th
the
i
n
c
r
ea
s
e
i
n
t
he
n
oti
f
i
c
at
i
on
m
e
s
s
ag
e
s
en
t
to
s
tu
de
n
t
a
c
c
o
m
pa
ni
ed
b
y
s
oa
r
i
ng
c
os
t
pe
r
m
es
s
ag
e,
the
de
s
i
gn
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Ref
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s
[1
]
G
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,
Al
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Hal
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2
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1
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IEE
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Pro
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2013
:
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IEEE
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2
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2
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1
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:
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2
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Co
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2
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IEEE
Con
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;
96
(
3
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.
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