Sensors,
Год журнала:
2024,
Номер
24(14), С. 4724 - 4724
Опубликована: Июль 21, 2024
This
study
proposes
wide-band
frequency
selective
surfaces
(FSS)
with
polarization-independent
characteristics
that
are
tailored
for
IoT
applications.
The
design
consists
of
two
different
layers
band-stop
target
key
bands
in
sub-6
GHz:
3.7
GHz
(n77)
and
4.5
(n79),
offering
a
1.39
bandwidth
spanning
from
3.61
to
5.0
GHz.
also
presents
double-layer
structure
WB
property
fractional
32%.
Simulations
have
been
conducted
observe
variations
insertion
loss
across
incident
polarization
angles
ranging
0
60
degrees
both
TE
TM
modes
the
suggested
FSS
structures.
These
simulations
demonstrate
design's
independence.
Transparent
polyvinyl
chloride
dielectric
constant
2.77
thickness
1.48
mm
has
utilized
as
substrate
material.
optical
transmittance
is
calculated
be
96.7%
Layer
1,
95.7%
2,
92.4%
structure,
these
values
were
found
higher
compared
studies
literature.
proposed
well-suited
applications
due
their
high
transparency,
cost-effectiveness,
robust
high-performance
capabilities
suppression,
features.
results
3D
full-wave
measurement
equivalent
circuit
model
outcomes,
good
agreement
between
was
observed.
Revista de Gestão Social e Ambiental,
Год журнала:
2025,
Номер
19(1), С. e011071 - e011071
Опубликована: Фев. 3, 2025
Objectives:
This
study
examines
the
relationship
between
smart
cities
and
sustainability
through
bibliometric
analysis,
focusing
on
literature
from
2010
to
2023
in
Web
of
Science
database.
Theoretical
Framework:
Smart
leverage
information
communication
technologies
(ICT)
enhance
environmental,
social,
economic
sustainability.
The
analysis
evaluates
key
terms,
influential
authors,
geographical
trends
uncover
how
address
goals.
Method:
In
this
study,
method
was
used
examine
impacts
Bibliometric
is
a
for
quantitatively
analyzing
scientific
specific
field,
aiming
identify
trends,
keywords,
citation
relationships,
distributions
within
literature.
Results
Discussion:
findings
highlight
positive
areas
such
as
energy
efficiency,
carbon
emission
reduction,
improved
urban
mobility
systems.
However,
also
identifies
significant
challenges,
including
barriers
social
sustainability,
concerns
over
data
security,
high
implementation
costs,
which
hinder
broader
adoption
city
projects.
By
emphasizing
role
ICT
tackling
global
issues,
provides
novel
framework
understanding
benefits
limitations
cities.
It
uniquely
gaps
integration
challenges
faced
developing
countries,
suggesting
further
exploration.
Research
Implications:
comprehensive
offers
fresh
insights
into
contribute
goals
while
urging
future
research
identified
opportunities
improvement.
Originality/Value:
unique
examining
patterns
2023.
highlights
critical
achieving
addressing
underexplored
like
countries.
identifying
both
initiatives,
valuable
policymakers
planners,
paving
way
more
inclusive
sustainable
development.
International Journal of Scientific Research in Computer Science Engineering and Information Technology,
Год журнала:
2025,
Номер
11(1), С. 2437 - 2445
Опубликована: Фев. 10, 2025
The
rapid
evolution
of
5G
technology
has
positioned
analog
layout
design
as
a
pivotal
element
in
advancing
modern
telecommunications
infrastructure.
Through
innovative
approaches
high-frequency
considerations,
circuit
optimization
techniques,
and
expert-driven
methodologies,
enabled
significant
breakthroughs
communication
systems.
article
mobile
edge
computing
with
vehicular
networks,
coupled
advancements
mmWave
phased
array
systems,
transformed
the
landscape
wireless
connectivity.
Performance
enhancements
signal
integrity,
power
efficiency,
thermal
management
have
been
achieved
through
sophisticated
strategies.
Machine
learning
applications
revolutionized
automation
capabilities
while
maintaining
critical
role
human
expertise.
implementation
ultra-low
voltage
techniques
advanced
networking
protocols
extended
impact
beyond
traditional
into
Internet
Things
smart
city
applications.
These
developments
laid
foundation
for
next-generation
enabling
enhanced
reliability,
reduced
latency,
improved
resource
utilization
across
diverse
from
autonomous
vehicles
to
massive
sensor
networks.
Future Internet,
Год журнала:
2025,
Номер
17(4), С. 140 - 140
Опубликована: Март 25, 2025
The
rapid
expansion
of
IoT
devices
has
introduced
major
challenges
in
ensuring
data
interoperability,
enabling
real-time
processing,
and
achieving
scalability,
especially
decentralized
edge
computing
environments.
In
this
paper,
an
advanced
framework
FedProx
with
ontology-driven
standardization
is
proposed,
which
can
meet
such
comprehensively.
On
the
one
hand,
it
guarantee
semantic
consistency
across
different
kinds
using
unified
ontology,
so
that
from
multiple
sources
could
be
seamlessly
integrated;
on
other
solves
non-IID
issues
limited
resources
servers
by
FedProx.
Experimental
findings
indicate
outperforms
FedAvg,
a
remarkable
accuracy
level
89.4%,
having
higher
convergence
rates,
attaining
30%
saving
communication
overhead
through
gradient
compression.
addition,
ontology
alignment
procedure
yielded
95%
success
rate,
thereby
uniform
preprocessing
domains,
including
traffic
monitoring
parking
management.
model
demonstrates
outstanding
scalability
flexibility
to
new
devices,
while
maintaining
high
performance
during
evolution.
These
highlight
its
great
potential
for
deployment
smart
cities,
environmental
monitoring,
IoT-based
ecosystems,
creation
more
efficient
integrated
solutions
these
areas.
Energies,
Год журнала:
2025,
Номер
18(8), С. 2036 - 2036
Опубликована: Апрель 16, 2025
The
development
of
renewable
energy
sources
(RESs)
is
a
key
element
the
policy
in
Poland
and
European
Union.
transition
to
green
aims
reduce
greenhouse
gas
emissions,
enhance
security,
decrease
dependence
on
fossil
fuels.
In
Poland,
RES
sector,
particularly
photovoltaics
wind
energy,
growing,
which
changing
operation
generation.
However,
increasing
share
RESs
mix
presents
challenges
for
stability
national
power
grid.
This
study
focuses
because
crucial
country’s
transition.
striving
achieve
its
climate
goals
fuels,
policy.
support
sustainable
Poland.
(1)
aim
this
article
was
analyze
impact
grids
identify
issues,
review
adaptation
strategies.
(2)
Methods
such
as
literature
statistical
data
analysis
were
used
build
scenarios.
(3)
sector
being
developed
through
application
both
policies.
main
are
photovoltaics.
(4)
introduction
technologies
storage
systems,
smart
grids,
advanced
management
strategies
response
posed
by
relation
Telecom,
Год журнала:
2024,
Номер
5(2), С. 416 - 432
Опубликована: Май 31, 2024
In
the
domain
of
cognitive
radio
(CR),
unlicensed
users
have
opportunity
to
efficiently
use
available
spectrum
bands
without
interfering
with
licensed
primary
(PUs).
Our
study
addresses
challenge
secondary
user
(SU)
shortage
due
high
arrival
rates
users.
We
propose
two
models
aimed
at
improving
average
total
waiting
time
for
SUs
in
such
scenarios.
These
incorporate
non-acquired
and
preemptive
priority
mechanisms
within
M/D/1
model
a
PU
delay
system.
Through
quantitative
evaluations
Monte
Carlo
simulations,
we
evaluate
performance
these
models.
findings
show
significant
improvements
both
PUs
SUs,
especially
under
scheme.
Furthermore,
explore
context
real-time
systems,
considering
limited
buffer
capacity
types.
This
further
improves
schemes.
contribution
lies
providing
effective
solutions
mitigate
SU
shortages
CR
networks,
insight
into
priority-based
approaches
system
considerations.
