Perceptions and Acceptability of Sensor-Based Activity Recognition
Systems Among Older Adults and Their Families
David D
´
ıaz-Jim
´
enez
a
, Jos
´
e L. L
´
opez
b
, Francisco J. Flores-Avil
´
es and Macarena Espinilla
c
University of Ja
´
en, Department of Computer Sciences, Spain
{ddjimene, llopez, fjfa0001, mestevez}@ujaen.es
Keywords:
Activity Recognition Systems, Sensor Devices, Multi-Occupancy Environments, User Perceptions, Perceived
Social Support.
Abstract:
This paper examines activity recognition systems that use sensor devices with specific activity models. It
presents a new system that combines motion, open/close, and ambient sensors with wristband devices and
location beacons. Alongside a detailed review of the system, the study also explores the views of two main
groups of users: older adults and their family members. Although related studies exist, this research introduces
the system and thoroughly analyzes user feedback. An important aspect is the acknowledgment of improve-
ments in sensor-based smart devices, especially in terms of size and subtlety compared to earlier bracelet
designs. This study included 40 anonymous participants who tested these system and key factors analyzed
include acceptability, safety, peace of mind, privacy, quality of life, autonomy, trust, perceived social support,
loneliness, and economic cost. This assessment offers useful insights into how users perceive and accept the
system, to understand the main concerns with commonly used devices like cameras and sensors helps identify
which devices older adults might be open to using in their routines. These insights are expected to guide the
development of future systems that better address user needs.
1 INTRODUCTION
The growing demographic shift towards an aging pop-
ulation presents a formidable challenge in society to-
day (United Nations, 2022), requiring the develop-
ment of innovative solutions to enhance the well-
being of older individuals. In response to this pressing
need, Human Activity Recognition Systems (HAR)
(Arshad et al., 2022; Bian et al., 2022) have emerged
as promising tools with the potential to address di-
verse health and autonomy-related needs among the
elderly.
These systems employ various approaches, with
the key determining factor being sensor selection. A
wide variety of sensors have been studied for activity
recognition (Liu et al., 2020; Fu et al., 2020; Dang
et al., 2020), particularly environmental and vision-
based sensors. The efficacy and applicability of activ-
ity recognition systems hinge significantly on these
two sensor types.
On the one hand, environmental sensors, designed
a
https://orcid.org/0000-0003-1791-4258
b
https://orcid.org/0000-0003-2583-8638
c
https://orcid.org/0000-0003-1118-7782
to capture data about the surrounding context, offer
insights into activities involving movement or envi-
ronmental changes (Dang et al., 2020; Yuan et al.,
2022). While helpful for recognizing activities with-
out direct visual observation, their limitations include
the inability to capture fine details, potentially leading
to information loss that might be crucial for accurate
identification (Ahad et al., 2020). External factors,
such as multi-occupancy, can also cause interference
and affect data reliability.
On the other hand, vision-based sensors use cam-
eras or optical devices to capture activities visually
(Beddiar et al., 2020), excelling in recognizing ac-
tions involving specific movements, gestures, or inter-
actions with objects (Franco et al., 2020; Dang et al.,
2020; Ramirez et al., 2021). Despite their ability
to provide detailed visual information, they also face
challenges, such as dependency on proper illumina-
tion, sensitivity to obstructions, and privacy concerns
arising from image and video capture (Langheinrich,
2002).
Alternative methods involve wearable devices
such as activity bracelets and smartwatches, which
extract biometric data from users (Fan and Gao, 2021;
Huang et al., 2021).
240
Díaz-Jiménez, D., López, J. L., Flores-Avilés, F. J. and Espinilla, M.
Perceptions and Acceptability of Sensor-Based Activity Recognition Systems Among Older Adults and Their Families.
DOI: 10.5220/0013278700003938
Paper published under CC license (CC BY-NC-ND 4.0)
In Proceedings of the 11th International Conference on Information and Communication Technologies for Ageing Well and e-Health (ICT4AWE 2025), pages 240-247
ISBN: 978-989-758-743-6; ISSN: 2184-4984
Proceedings Copyright © 2025 by SCITEPRESS Science and Technology Publications, Lda.
Fog nodes are placed near data sources to col-
lect and pre-process data, optimizing transmission to
the cloud and reducing network load. They may use
lightweight models for initial tasks. The cloud man-
ages then data storage, applying more complex activ-
ity recognition models. This division optimizes trans-
mission, ensures flexibility, and enables comprehen-
sive data management.
Numerous proposals have emerged within this do-
main, aiming to provide effective and non-intrusive
solutions for older adults. Examples include the
Konekta2 system (Codina, 2022), Beprevent (Ger,
2020), the Noa smart pill dispenser (Inb, 2020), and
the ACTIVA system (Montoro Lend
´
ınez et al., 2023),
each addressing specific aspects of monitoring and
support for daily activities.
When comparing state-of-the-art activity recogni-
tion systems, several points can be noted. Some ap-
proaches require the installation of surveillance cam-
eras and image processing, like the HAR system in
Hussain et al. (Hussain et al., 2022), which combines
a pre-trained Vision Transformer and recurrent neural
networks (LSTM) to capture long-term temporal in-
formation. Su et al. (Su et al., 2023) propose a deep
learning-based framework for real-time non-contact
human activity detection using self-powered sensors.
In this work, a multi-layer bidirectional short- and
long-term memory (MBLSTM) network is used to
process Wi-Fi channel state information (CSI) and
recognize human activities. While the system shows
very promising results, multi-occupancy is a chal-
lenge when using this technique, since it cannot dis-
cern several subjects. This is also the case in (Bha-
vanasi et al., 2023), which uses compact radar sen-
sors for patient activity recognition in hospitals. Con-
versely, our approach avoids these concerns by using
sensors that do not compromise individuals’ privacy,
along with a system to deal with multi-occupancy.
The success of these HAR systems hinges on user
perceptions, particularly those of older adults, and the
acceptability of the sensors employed (Camp et al.,
2022). Older individuals often face challenges re-
lated to mobility, health, and safety (Mottram et al.,
2008; Niccoli and Partridge, 2012). To ensure the ef-
fectiveness of these solutions, it is crucial to under-
stand the acceptability of different sensor types in ac-
tivity recognition systems. Thus, the research ques-
tion guiding this study focuses on the acceptability of
sensor types in the activity recognition of older adults,
as follows:
Research Question: How acceptable are different
sensor types to older adults for activity recognition?
This work aims to address the research question
through a comprehensive analysis of the perceptions
held by older adults and their family members regard-
ing sensor-based activity recognition systems. The
specific objectives include:
1. Study Older Adults’ Perceptions: Conduct an
in-depth analysis of how older individuals per-
ceive activity recognition systems, with an em-
phasis on identifying both advantages and disad-
vantages that these systems may entail for them.
2. Assess Acceptability: Evaluate how acceptable
activity recognition systems are to older adults,
addressing crucial aspects such as trust, security,
privacy, and peace of mind.
3. Evaluate Family Members’ Opinions: Investi-
gate how family members view activity recogni-
tion systems, particularly focusing on aspects like
security, privacy, usability, and other relevant con-
siderations.
This study will analyze the role of sensors in activ-
ity recognition systems in the homes of older adults.
The aim is to gain a greater understanding of their
needs, since these systems can be used for a wide
range of purposes, such as detection of abnormal be-
haviors (K
¨
onig et al., 2015; Umbricht et al., 2020) or
monitoring activities that encourage autonomy.
Identifying the primary concerns around com-
monly used devices, such as cameras and sensors, is
crucial to understand which devices people would be
willing to integrate into their daily lives. This under-
standing will enable a focused effort to develop new
systems that capitalize on these findings.
The structure of the paper is as follows: in Sec-
tion 2, we present a novel sensor-driven connected
health system designed to monitor people’s activities
within their homes. Section 3 presents the method-
ology used to conduct the analysis. In Section 4, the
results from the questionnaires are discussed. Finally,
Section 5 sets out the conclusions of the paper.
2 MATERIALS AND METHODS
In this section, we present the activity recognition sys-
tem used in our study and explain the method fol-
lowed for our acceptability analysis. This system
serves as a basic framework for subsequent evaluation
by direct users, older adults, and family members, en-
suring they are able to provide a comprehensive as-
sessment and usability feedback.
2.1 System
The architecture of the proposed activity recognition
system is illustrated in Figure 1. This figure pro-
Perceptions and Acceptability of Sensor-Based Activity Recognition Systems Among Older Adults and Their Families
241
vides a visual representation of the system’s design
and components, offering a better understanding of
its structure and functionality.
Figure 1: System Architecture.
2.1.1 Device Layer
The device layer comprises various devices that con-
tribute data to the system, including sensors and loca-
tion devices:
Open and Close Sensors. These sensors use a
magnetic field to detect separations between their
components. In our system, they are deployed at
the main entrance and on containers storing medi-
cations for the users. The specific sensor we have
deployed is the Aqara Door and Window Sensor,
which uses Zigbee technology and has an esti-
mated battery life of two years.
Motion Sensors. Infrared-based motion sensors
detect infrared radiation emitted by objects within
their field of view. Strategically positioned in ar-
eas like bathrooms, communal spaces, and beds,
these sensors track residents’ movements, provid-
ing insights into activities such as sleeping and
toileting. The Aqara P1 motion sensor features
a sensing angle of approximately 170° and a sens-
ing distance of approximately 7 meters. It works
with Zigbee 3.0 wireless connections and has a
battery life of up to 5 years. This device, unlike
others, allows us to modify the detection range
and time, which makes it adaptable to different
activities by defining specific detection zones.
Temperature and Humidity Sensors. These
sensors monitor ambient conditions like temper-
ature and humidity. They provide data regard-
ing environmental parameters in monitored ar-
eas. Within our system, they are deployed in
bathing areas to detect changes in related activi-
ties. The Aqara Temperature and Humidity Sen-
sor uses Zigbee technology and has a battery life
of two years.
Location Detection. To address multi-occupancy
scenarios, we adopted the methodology outlined
in the ACTIVA system (Montoro Lend
´
ınez et al.,
2023; Espinilla et al., 2018a; Espinilla et al.,
2018b). This method relies on Received Sig-
nal Strength Indicator (RSSI) measurements be-
tween fixed anchor devices positioned in various
rooms and a beacon device carried by the user.
Raspberry Pi 4 devices and external Bluetooth 4.0
modules serve as anchor devices, while Mi Band
3 activity bracelets function as beacons. These
leverage their Bluetooth connectivity to capture
RSSI between anchors, enabling location detec-
tion. The activity bracelets have an estimated bat-
tery life of 3 weeks.
These sensors have been selected specifically for
the activities under monitoring: physical activity,
sleep patterns, hygiene routines, and dietary habits.
2.1.2 Fog Layer
The fog layer is a pivotal component within the sys-
tem, featuring a Raspberry Pi equipped with a Blue-
tooth adapter and a Zigbee Conbee2 communica-
tions module. This central node interconnects vari-
ous devices distributed throughout the environment.
Leveraging the Zigbee protocol, it establishes con-
nections with different sensors positioned throughout
the living space. We adopted Zigbee because of its
widespread availability in commercial sensors and be-
cause it offers extensive communication capabilities
coupled with low power consumption, thus render-
ing it preferable over alternatives such as Wi-Fi (Lee
et al., 2007).
These sensors are managed through the Home As-
sistant platform
1
, which allows us to configure and
integrate devices operating on different technologies.
Upon receiving data within the platform, it is dissem-
inated across a network under the MQTT protocol
(through by Mosquitto Broker
2
) for further process-
ing and transmission to the database.
Regarding location detection, each anchor device
publishes its RSSI values relative to the beacon within
the MQTT network. When the central node receives
1
https://www.home-assistant.io/
2
https://mosquitto.org/
ICT4AWE 2025 - 11th International Conference on Information and Communication Technologies for Ageing Well and e-Health
242
these values, a location model is run to determine the
device’s location. The resulting locations are subse-
quently transmitted to the cloud layer for storage and
further processing.
2.1.3 Cloud Layer
The cloud layer is another core element of the system,
housing the majority of its components. Comprising
four key elements a database, a reverse proxy, an
AI computing module and web platform this layer
orchestrates crucial system functionalities.
Database. MongoDB
3
, a NoSQL document-
based database, has been selected to accommo-
date the heterogeneous data obtained from vari-
ous sensors. Its flexible schema aligns well with
the diverse nature of the sensor data, meeting the
system’s requirements effectively.
Reverse Proxy. We chose Nginx
4
as a reverse
proxy because it meets stringent security demands
across all system elements, while allowing for en-
hanced scalability. The system’s security is forti-
fied by TLS implementation for inbound and out-
bound communications, extensive logging for au-
dit purposes, and deployment of attack mitigation
techniques, such as DDoS attacks.
AI Computing Module. The AI computing mod-
ule analyzes user activities and verifies their ad-
herence to predefined activity regimens estab-
lished by the researchers or healthcare staff, which
set out the objectives or healthy habits individu-
als must uphold (Montagut-Mart
´
ınez et al., 2022).
The module processes daily sensor and location
data for each user, leveraging predefined rules to
categorize activities. Subsequently, it evaluates
whether these activities align with the stipulations
outlined in the established regimen.
Web Platform. The web platform, developed un-
der the Django framework
5
, serves as a central-
ized hub for managing sensors and disseminating
information to healthcare personnel. Django’s ro-
bust toolset and comprehensive library of exten-
sions facilitate agile development.
It is noteworthy that all components operate
within containers, leveraging Docker technology to
establish a private network, which provides the advan-
tage of enhanced scalability and security. This con-
tainerized approach enables the creation of container
3
https://www.mongodb.com/
4
https://www.nginx.com/
5
https://www.djangoproject.com/
replicas to bolster system capacity and ensures isola-
tion from other host system components, improving
overall system robustness and resilience.
2.1.4 Application Layer
As previously discussed, the web platform provides
comprehensive management functionalities for all
system components. Specifically, it allows techni-
cal personnel to oversee sensors, anchors, activity
bracelets, and residential units within the system. At
the same time, healthcare professionals can tailor
health or activity regimens to meet the unique needs
of individual users. Staff are also able to monitor
compliance with these regimens across various time
intervals, ranging from days to weeks and months. In
addition, they can aggregate data by specifying start
and end dates, enabling an effective assessment of
users’ compliance with predefined activities.
2.1.5 Test Environment
Prior to deploying the system in the homes of the peo-
ple to be monitored, the system was deployed in a
SmartLab. The SmartLab is a testing environment
where several technologies are deployed in evalua-
tion for research purposes. At the moment it has a
wide variety of sensors and systems, mainly focus on
activity recognition. Although the SmartLab presents
a testing environment, it is constrained in certain sit-
uations. An example of this is the unavailability of
running water in the facility and the lack of a shower,
having to simulate activities such as brushing teeth,
showering and so on, therefore results may vary in
real environments. As can be seen in Figure 2, the
different elements that conform the system are shown
deployed.
3 METHODOLOGY
To conduct this research, a sample of 40 anonymous
individuals was recruited on a voluntary basis, each
having provided informed consent. The participants
were categorized into two distinct groups: a cohort
of 20 adults aged between 65 and 82 years, with an
equal gender distribution, and another cohort of 20
caregivers or adult family members, aged between 23
and 70 years, predominantly female.
To address the understanding of the system by the
participants recruited for our sample group, it is im-
perative to note that we ensured that they received in-
depth explanations of the sensors and devices used
along with the methods of data collection and the
Perceptions and Acceptability of Sensor-Based Activity Recognition Systems Among Older Adults and Their Families
243
Figure 2: System elements deployed in the SmartLab.
recording of their activities. To ensure that partici-
pants understood the implications of the study before
giving their informed consent.
Two bespoke instruments were used for data col-
lection: a survey drawn up for older adults and an-
other designed for their family members. The ques-
tionnaire directed at older adults, comprising 19 items
and three open-ended questions, delved into critical
domains such as acceptability, safety, quality of life,
personal autonomy, intimacy, privacy, trust, loneli-
ness, perceived social support, and financial invest-
ment. The questionnaire targeting relatives of the
older adults, encompassing 12 items and 10 short-
answer questions, explored similar themes, with the
aim of obtaining a complementary perspective from
the family members’ point of view. The possible an-
swers are Not at all, A little, Moderately, Quite a lot
and A lot, depending on how much the person agrees
with the question. The questionnaires as well as the
results of the questionnaires can be found at the fol-
lowing link: Perceptions study
The survey was designed based on previous re-
search that explored older adults’ perception and ac-
ceptance of sensor technology and home health mon-
itoring. The previous studies used as the basis for the
design were the following:
“Elderly persons’ perception and acceptance of
using wireless sensor networks to assist health-
care” (Steele et al., 2009), which examined how
older people perceive and accept the use of wire-
less sensor networks for healthcare and provided
valuable insights into their attitudes and concerns
regarding home monitoring technology and their
willingness to adopt it;
“Perceptions of In-home Monitoring Technology
for Activities of Daily Living: Semistructured In-
terview Study With Community-Dwelling Older
Adults” (Camp et al., 2022), which used semi-
structured interviews to understand older adults’
perceptions of in-home monitoring technology for
activities of daily living, providing relevant infor-
mation on their opinions on the usefulness, ease
of use and concerns associated with monitoring
technology; and
Statistical Study of User Perception of Smart
Homes during Vital Signal Monitoring with an
Energy- Saving Algorithm” (Del-Valle-Soto et al.,
2022), which analyzed user perception of smart
homes during vital sign monitoring with an
energy-saving algorithm and was fundamental to
understanding how users interact with smart home
technology and their expectations in terms of en-
ergy efficiency and functionality.
These studies provided a conceptual framework
for the design of the survey, allowing us to iden-
tify key factors related to the perception and ac-
ceptance of monitoring technology in the home.
Based on this previous work, the design of the
questionnaires focused on critical aspects such as
ease of use, perceived usefulness, privacy con-
cerns, and willingness to adopt home monitoring
technologies.
Although the hardware configurations may be dif-
ferent from previous studies, the underlying technol-
ogy remains very similar. As mentioned above, the
ICT4AWE 2025 - 11th International Conference on Information and Communication Technologies for Ageing Well and e-Health
244
sensors and their functionality have been explained in
detail so as to ensure that they are thoroughly under-
stood by all participants. This helps to minimize the
potential effects that variations in hardware or soft-
ware could have on subjective opinion, even if envi-
ronmental factors have not been fully controlled for.
Data collection began with reaching out to par-
ticipants by telephone, followed by distributing the
survey links via the Google Forms platform. Ba-
sic demographic information, including age, gender,
and marital status, was gathered. This standardized
procedure was uniformly applied to both participant
groups, ensuring methodological consistency and the
acquisition of high-quality data.
4 DISCUSSION
4.1 Older Adult Results
The results of the surveys for older adults provide
valuable insights into their perceptions of sensor-
based activity recognition systems. The primary aim
was to analyze their perspectives on acceptability,
safety, quality of life, personal autonomy, privacy,
trust, perceived social support, and their views re-
garding the advantages and disadvantages of such sys-
tems.
Regarding acceptability , 25% of participants ex-
pressed reluctance to use cameras providing clear
footage, while 10% were very willing, and 20% were
quite willing. Regarding the installation of ther-
mal cameras, 45% had no objection. With regards
to the use of sensors on everyday objects, 75% ex-
pressed no reservations. The results revealed a gen-
eral acceptance of these systems among older adults,
with motion and open/closed sensors emerging as the
most widely accepted components, which is consis-
tent with previous research (Camp et al., 2022).
Concerning security and quality of life, 45% of
the sample would significantly feel safer with the im-
plementation of sensor-based systems. In terms of
quality of life and personal autonomy, 35% believed
their personal autonomy would substantially increase,
while 25% thought it would increase to a considerable
extent. Regarding overall quality of life, only 20% an-
ticipated a significant increase. Overall, our survey
suggests that sensor-based activity recognition sys-
tems enhance personal autonomy and support inde-
pendent living for older adults, especially when used
for medical purposes or emergencies. These findings
align with the Steele et al. study (Steele et al., 2009),
where participants prioritized timely assistance over
data privacy concerns.
On the matter of privacy, 55% of participants felt
that sensor-based systems would moderately respect
their privacy. Regarding trust, 75% believed these
systems could enhance the speed of response in the
event of an emergency.
When it came to perceived social support and
loneliness, 40% of participants believed they would
experience increased social support with the im-
plementation of these systems. Additionally, 50%
thought that these systems would moderately help al-
leviate feelings of loneliness. In terms of peace of
mind, our study found that sensor systems provide
an increased sense of safety and calmness, consistent
with findings by Del Valle et al. (Del-Valle-Soto et al.,
2022) on the perceptions of smart home users during
monitoring.
Finally, regarding advantages and disadvantages,
it is noteworthy that the majority of participants be-
lieved these systems would offer peace of mind, secu-
rity, assistance, and independence. As for the draw-
backs, price, lack of privacy, and complexity of use
emerged as the most prevalent concerns. Concerns
about the cost and usability of these systems remain
prevalent among older adults, as seen in our study and
supported by previous research by Claes et al. (2015)
(Claes et al., 2015).
4.2 Family Survey Results
The results of the survey for family members or care-
givers provide additional insights into their percep-
tions of sensor-based activity recognition systems.
Regarding acceptability, 28.57% of participants
expressed a strong willingness to use these systems,
and an additional 28.57% are moderately willing.
Concerning security and peace of mind, 38.10% of
respondents believe that these systems would signifi-
cantly contribute to providing peace of mind regard-
ing their elderly relatives.
Concerning quality of life, 28.5% of participants
believe that use of these systems could substantially
enhance autonomy and safety, contributing signifi-
cantly to an improved quality of life. Regarding pri-
vacy, 42.86% of family members express concerns
that these systems may not adequately respect their
relative’s privacy.
In terms of utility, 52.38% of participants be-
lieve that these systems would provide a considerable
amount of information about their family member’s
well-being, while 42.86% think it would be highly
beneficial if their family member had this type of sys-
tem. Our study suggests that sensor systems offer
peace of mind and utility, although direct support-
ing research is lacking. However, Camp et al.(Camp
Perceptions and Acceptability of Sensor-Based Activity Recognition Systems Among Older Adults and Their Families
245
et al., 2022) found that younger participants were
more knowledgeable and accepting of activity mon-
itoring systems than older adults.
Opinions regarding home monitoring systems
among family members encompass a diverse spec-
trum. Paramount among concerns is the safeguarding
of privacy, with a notable reluctance to install cameras
in specific living spaces. At the same time, consider-
ations around convenience, user-friendliness, and the
upkeep of these systems are pivotal.
In their answers to the open-ended questions, par-
ticipants placed significant value on the efficacy, pre-
cision, and incorporation of virtual assistants within
these systems. In particular, speed of connectivity
was considered critical for an effective response in
case of emergencies.
In terms of technological preferences, there is a
clear preference for sensor-based solutions, followed
by cameras and wearable devices.
Financial commitment towards these systems
varies, with respondents indicating a willingness to
invest between 200 to 4000 euros, alongside an open-
ness to monthly subscription models. However, un-
certainty prevails around the matter of pricing.
Regarding information alerts, unanimous prefer-
ence is observed for urgent notifications via telephone
calls and real-time updates through mobile applica-
tions. Conversely, periodic reports on the well-being
or activities of family members are deemed non-
essential by certain respondents.
Connectivity to emergency services is unani-
mously seen as imperative among participants.
In discussions pertaining to camera-based sys-
tems, opinions diverge. While a portion of respon-
dents expresses indifference, the remaining half un-
derscores the necessity for stringent privacy protocols
and data management practices.
5 CONCLUSIONS
In this paper, we propose an innovative activity recog-
nition system utilizing a suite of sensors—such as
motion detectors, wrist-worn devices, open/close sen-
sors, and location beacons to cover multi occupancy
environments. The research explores system’s accep-
tance, with particular emphasis on reliability and effi-
ciency, offering a nuanced understanding of its prac-
tical applications in everyday contexts.
The paper examines perceptions among older
adults and their families regarding this technological
solution, considering factors like perceived accept-
ability, usability, and the impact on autonomy, qual-
ity of life, and social support. This dual approach
bridges the technical capabilities of the system with
the subjective experiences of potential users, provid-
ing a well-rounded assessment of the system’s bene-
fits and possible areas for refinement.
The main key findings underscore the necessity
of ensuring future designs are guide by user pri-
vacy, accessible in terms of ease of use, and fi-
nancially sustainable. By identifying prevalent con-
cerns—especially around commonly deployed de-
vices like cameras and sensors—this study suggests
a pathway toward developing supportive technologies
that older adults can trust and rely on. Prioritizing
simplicity, privacy, and reliability can lead to solu-
tions that not only offer technological support but also
enhance daily living and respect individual prefer-
ences, fostering a genuine integration of technology
in their routines.
ACKNOWLEDGMENTS
This result has been partially supported by
grant PID2021-127275OB-I00 funded by MI-
CIU/AEI/10.13039/501100011033 and by “ERDF A
way of making Europe”, grant PDC2023-145863-I00
funded by MICIU/AEI/10.13039/501100011033 and
by “European Union NextGenerationEU/PRTR”,
and grant M.2 PDC 000756 funded by Consejer
´
ıa
de Universidad, Investigaci
´
on e Innovaci
´
on and by
ERDF Andalusia Program 2021-2027.
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