Research Square (Research Square),
Год журнала:
2022,
Номер
unknown
Опубликована: Окт. 5, 2022
Abstract
Sensing
and
recognizing
invisible
ultraviolet
(UV)
light
is
vital
for
exploiting
advanced
artificial
visual
perception
system
with
tetrachromacy.
However,
due
to
the
uncertainty
of
natural
environment,
UV
signal
very
hard
be
detected
perceived.
Here,
we
report
a
controllable
UV-ultrasensitive
neuromorphic
vision
sensor
(NeuVS)
that
uses
organic
phototransistors
(OPTs)
as
working
unit
integrate
sensing,
memory
processing
functions.
Benefiting
from
asymmetric
molecular
structure
unique
absorption
active
layer,
fabricated
NeuVS
can
detect
illumination
intensity
370
nm
UV-light
low
31
nw
cm-2
exhibit
one
best
optical
figures
merit
in
UV-sensitive
sensors.
Furthermore,
array
exbibits
good
image
sensing
memorization
capability
its
ultrasensitive
detection
large
density
charge
trapping
states.
In
addition,
wavelength-selective
response
multi-level
properties
are
utilized
construct
an
neural
network
(ANN)
extraction
identification
information.
The
extract
handwritten
digit
original
color
by
filtering
red,
green
blue
(RGB)
noise,
significantly
improve
recognition
accuracy
46%
90%.
Philosophical Transactions of the Royal Society B Biological Sciences,
Год журнала:
2022,
Номер
377(1862)
Опубликована: Сен. 4, 2022
Ants
are
ecologically
one
of
the
most
important
groups
insects
and
exhibit
impressive
capabilities
for
visual
learning
orientation.
Studies
on
numerous
ant
species
demonstrate
that
ants
can
learn
to
discriminate
between
different
colours
irrespective
light
intensity
modify
their
behaviour
accordingly.
However,
findings
across
variable
inconsistent,
suggesting
our
understanding
colour
vision
in
what
roles
ecological
phylogenetic
factors
play
is
at
an
early
stage.
This
review
provides
a
brief
synopsis
critical
past
century
research
by
compiling
studies
address
molecular,
physiological
behavioural
aspects
vision.
With
this,
we
aim
improve
gain
deeper
insights
into
mysterious
colourful
world
ants.
article
part
theme
issue
‘Understanding
vision:
physiological,
neuronal
arthropods’.
Frontiers in Cellular Neuroscience,
Год журнала:
2022,
Номер
16
Опубликована: Окт. 6, 2022
A
large
proportion
of
animal
species
enjoy
the
benefits
being
active
at
night,
and
have
evolved
corresponding
optical
neural
adaptations
to
cope
with
challenges
low
light
intensities.
However,
over
past
century
electric
lighting
has
introduced
direct
indirect
pollution
into
full
range
terrestrial
habitats,
changing
nocturnal
animals'
visual
worlds
dramatically.
To
understand
how
these
changes
affect
behavior,
we
here
propose
an
animal-centered
analysis
method
based
on
environmental
imaging.
This
approach
incorporates
sensitivity
acuity
limits
individual
species,
arriving
predictions
photon
catch
relative
noise
thresholds,
contrast
distributions,
orientation
cues
can
extract
from
scenes.
relies
just
a
limited
number
system
parameters
known
for
each
species.
By
accounting
light-adaptation
in
our
analysis,
are
able
make
more
realistic
information
animals
scenes
under
different
levels
pollution.
With
this
method,
aim
provide
context
interpretation
behavioral
findings,
allow
researchers
generate
specific
hypotheses
behavior
observed
light-polluted
Proceedings of the Royal Society B Biological Sciences,
Год журнала:
2023,
Номер
290(1992)
Опубликована: Фев. 8, 2023
Circadian
light
entrainment
in
some
insects
is
regulated
by
blue-light-sensitive
cryptochrome
(CRY)
protein
that
expressed
the
clock
neurons,
but
this
not
case
hymenopterans.
The
hymenopteran
does
contain
CRY,
it
appears
to
be
light-insensitive.
Therefore,
we
investigated
role
of
retinal
photoreceptors
photic
jewel
wasp
Nasonia
vitripennis.
Application
monochromatic
stimuli
at
different
intensities
caused
phase
shifts
wasp's
circadian
activity
from
which
an
action
spectrum
with
three
distinct
peaks
was
derived.
Electrophysiological
recordings
compound
eyes
and
ocelli
revealed
presence
photoreceptor
classes,
peak
sensitivities
340
nm
(ultraviolet),
450
(blue)
530
(green).
An
additional
class
sensitivity
maximum
560-580
(red)
found.
Whereas
a
simple
sum
spectral
could
explain
shifts,
modelling
indicates
antagonistic
interactions
between
pairs
photoreceptors,
residing
ocelli.
Our
findings
imply
mechanism
N.
vitripennis
encompasses
neural
pathways
for
measuring
absolute
luminance
as
well
circuits
mediating
colour
opponency.
Journal of Experimental Biology,
Год журнала:
2023,
Номер
226(15)
Опубликована: Июль 7, 2023
Leafrollers
(Lepidoptera:
Tortricidae)
are
a
large
family
of
small
moths
containing
over
10,000
species,
many
which
crop
pests.
Grapholita
molesta,
Lobesia
botrana
and
Cydia
pomonella
adults
sexually
active
before,
during
after
sunset,
respectively.
We
wanted
to
determine
whether
being
at
different
times
the
day
night
is
associated
with
differences
in
their
visual
system.
Spectral
sensitivity
(SS)
was
measured
electroretinograms
selective
adaptation
green,
blue
ultraviolet
light.
SS
curves
could
be
fitted
triple
nomogram
template
indicated
existence
three
photoreceptor
classes
peaking
355,
440
525
nm.
The
retinae
showed
clear
regionalization,
fewer
receptors
dorsally.
No
among
species
or
between
sexes
were
found.
Intracellular
recordings
C.
also
revealed
sensitivities
photoreceptors
inhibitory
responses
green
part
spectrum,
indicating
presence
colour-opponent
Flicker
fusion
frequency
experiments
that
response
speed
similar
fused
around
100
Hz.
Our
results
indicate
have
ancestral
insect
retinal
substrate
for
trichromatic
colour
vision,
based
upon
UV,
green-sensitive
photoreceptors,
lack
any
prominent
adaptations
related
under
light
conditions.
Journal of Experimental Biology,
Год журнала:
2023,
Номер
226(7)
Опубликована: Март 27, 2023
ABSTRACT
The
Australian
lycaenid
butterfly
Jalmenus
evagoras
has
iridescent
wings
that
are
sexually
dimorphic,
spectrally
and
in
their
degree
of
polarization,
suggesting
these
properties
likely
to
be
important
mate
recognition.
We
first
describe
the
results
a
field
experiment
showing
free-flying
individuals
J.
discriminate
between
visual
stimuli
vary
polarization
content
blue
wavelengths
but
not
others.
then
present
detailed
reflectance
spectrophotometry
measurements
male
female
wings,
exhibit
blue-shifted
reflectance,
with
lower
relative
wings.
Finally,
we
novel
method
for
measuring
alignment
ommatidial
arrays:
by
variation
depolarized
eyeshine
intensity
from
patches
ommatidia
as
function
eye
rotation,
show
(a)
individual
rhabdoms
contain
mutually
perpendicular
microvilli;
(b)
many
array
have
microvilli
misaligned
respect
neighboring
much
45
deg;
(c)
useful
robust
detection.
By
mapping
distribution
misalignments
evagoras,
males
females
differences
extent
which
aligned.
Both
number
suitable
detection
aligned
edge
both
sex
patch
elevation.
Thus,
exhibits
finely
tuned
arrays
perception
polarized
signals,
match
sex-specific
life
history
utility
signals.
physica status solidi (RRL) - Rapid Research Letters,
Год журнала:
2023,
Номер
17(12)
Опубликована: Июнь 24, 2023
Neuromorphic
devices
emulating
the
brain
functionality
have
achieved
a
substantial
scientific
leap
in
last
decade.
Among
them,
neuromorphic
vertical
transistors
attracted
extensive
interests
due
to
their
abilities
of
mitigating
physical
channel‐length
limitations
and
developing
new‐generation
3D
integrated
electronics.
In
this
review,
recent
advances
major
trends
field
emerging
based
on
transistor
are
focused
on.
It
has
been
started
with
brief
introduction
biological
nervous
system
behaviors.
Next,
latest
development
shed
light
bio‐related
applications
discussed.
They
discussed
detail
from
aspects
materials
potential
applications.
Finally,
future
research
challenges
briefly
summarized,
prospects
Journal of Experimental Biology,
Год журнала:
2023,
Номер
226(24)
Опубликована: Ноя. 3, 2023
The
striking
structural
variation
seen
in
arthropod
visual
systems
can
be
explained
by
the
overall
quantity
and
spatio-temporal
structure
of
light
within
habitats
coupled
with
developmental
physiological
constraints.
However,
little
is
currently
known
about
how
fine-scale
structures
arises
across
shorter
evolutionary
ecological
scales.
In
this
study,
we
characterise
patterns
interspecific
(between
species),
intraspecific
sexes)
intraindividual
eye
regions)
system
four
ithomiine
butterfly
species.
These
species
are
part
a
diverse
26-million-year-old
Neotropical
radiation
where
changes
mimetic
colouration
associated
shifts
ecology,
such
as
microhabitat
preference.
Using
combination
selection
analyses
on
opsin
sequences,
vivo
ophthalmoscopy,
micro-computed
tomography
(micro-CT),
immunohistochemistry,
confocal
microscopy
neural
tracing,
quantify
describe
physiological,
anatomical
molecular
traits
involved
processing.
these
data,
provide
evidence
substantial
Ithomiini,
including:
(i)
relaxed
opsins,
perhaps
mediated
habitat
preference,
(ii)
physiology
anatomy,
(iii)
extensive
sexual
dimorphism,
including
complete
absence
butterfly-specific
optic
neuropil
males
some
We
conclude
that
considerable
exist
insect
radiations,
hinting
at
lability
to
rapidly
develop
specialisations
distinct
ecologies,
acting
perceptual,
processing
level.
The Journal of Comparative Neurology,
Год журнала:
2024,
Номер
532(2)
Опубликована: Янв. 10, 2024
Abstract
Extensive
analysis
of
the
flower‐visiting
behavior
a
butterfly,
Papilio
xuthus
,
has
indicated
complex
interaction
between
chromatic,
achromatic,
and
motion
cues.
Their
eyes
are
spectrally
rich
with
six
classes
photoreceptors,
respectively
sensitive
in
ultraviolet,
violet,
blue,
green,
red,
broad‐band
wavelength
regions.
Here,
we
studied
anatomy
physiology
photoreceptors
second‐order
neurons
P.
focusing
on
their
spectral
sensitivities
projection
terminals
to
address
where
early
visual
integration
takes
place.
We
thus
found
blue
all
terminate
distal
region
second
optic
ganglion,
medulla.
identified
five
types
based
arborization
first
lamina,
shape
medulla
terminals.
sensitivity
is
independent
morphological
but
reflects
combination
pre‐synaptic
photoreceptors.
The
results
indicate
that
most
plausible
for
integration.
Nanoscale Horizons,
Год журнала:
2024,
Номер
9(7), С. 1166 - 1174
Опубликована: Янв. 1, 2024
Optoelectronic
devices
present
a
promising
avenue
for
emulating
the
human
visual
system.
However,
existing
struggle
to
maintain
optical
image
information
after
removing
external
stimuli,
preventing
integration
of
perception
and
memory.
The
development
optoelectronic
memory
offers
feasible
solution
bridge
this
gap.
Simultaneously,
artificial
vision
perceiving
storing
ultraviolet
(UV)
images
is
particularly
important
because
UV
light
carries
imperceptible
naked
eye.
This
study
introduces
multi-level
based
on
gallium
nitride
(GaN),
seamlessly
integrating
sensing
functions
within
single
device.
embedded
SiO2
side-gates
around
source
drain
regions
effectively
extend
lifetime
photo-generated
carriers,
enabling
dual-mode
storage
signals
in
terms
threshold
voltage
ON-state
current.
demonstrates
excellent
robustness
with
retention
time
exceeding
4
×
104
s
programming/erasing
cycles
surpassing
1
105.
Adjusting
gate
achieves
five
distinct
states,
each
characterized
by
retention,
efficiently
modulates
erasure
times
rapid
erasure.
Furthermore,
GaN
array
successfully
captures
stably
stores
specific
over
7
days.
marks
significant
stride
memories,
showcasing
their
potential
applications
requiring
prolonged
retention.