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<title-group><article-title>AI IoT-Powered Smart City Energy Management Systems: A Framework for Efficient Resource</article-title></title-group>
<contrib-group>
<contrib contrib-type="author"><name><surname>Pandey</surname><given-names>Ayush</given-names></name><xref ref-type="aff" rid="aff1"/></contrib>
<contrib contrib-type="author"><name><surname>Alimoradi</surname><given-names>Mahmoud</given-names></name><xref ref-type="aff" rid="aff2"/></contrib>
<contrib contrib-type="author"><name><surname>Fakheri</surname><given-names>Soheil</given-names></name><xref ref-type="aff" rid="aff2"/></contrib>
<aff id="aff1">Departmant of Computer Science Engineering, KIIT Unoversity, Bhubaneshwar, India.</aff>
<aff id="aff2">Department of Industrial Engineering, Ayandegan University, Tonekabon, Iran.</aff>
</contrib-group>
<abstract><p>This paper introduces a scalable, integrated Artificial Intelligence (AI)-driven Internet of Things (IoT) framework to optimize resource management in smart city infrastructures, particularly for water, energy, waste, and transportation. As urban populations grow, the demands for efficient resource distribution and waste management intensify, requiring systems that can process and react to data in real time. The proposed framework incorporates a layered IoT system architecture, scalability features, advanced data processing algorithms, and security measures to handle large-scale IoT device deployments and data flows in urban settings. Tested against existing systems, the framework demonstrates substantial improvements in resource optimization and efficiency. Performance metrics, comparative analysis, and security evaluations underscore the framework’s robustness and reliability, supporting sustainable smart city growth.</p></abstract>
<kwd-group kwd-group-type="author"><kwd>Smart city</kwd><kwd>Artificial intelligence</kwd><kwd>Internet of things</kwd><kwd>Resource management</kwd><kwd>Scalability</kwd><kwd>Urban</kwd></kwd-group>
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<p>infrastructure.</p>
</sec>
<sec id="sec-2"><label>1</label><title>Introduction</title>
<p>Urbanization has introduced unprecedented challenges in managing resources like energy, water, waste, and transportation. Traditional infrastructure systems, designed to serve smaller populations, are now strained by the rapid influx of people moving to urban areas. This strain underscores the need for innovative solutions that can enhance the efficiency and sustainability of city management systems. Integrating Artificial Intelligence (AI) and the Internet of Things (IoT) into urban infrastructure offers a promising approach to address these complex challenges, enabling the development of &quot;smart cities&quot; that dynamically adjust to evolving resource demands <xref ref-type="bibr" rid="ref-1">[1–4]</xref>.</p>
<p>This paper introduces a new framework that leverages AI and IoT technologies to provide an adaptive, scalable solution for smart city resource management. Specifically, it explores how IoT devices embedded within city infrastructure can collect and process large volumes of data, which AI algorithms then analyze to make real-time decisions. Key areas of focus include energy management, water distribution, waste handling, and public transportation <xref ref-type="bibr" rid="ref-1">[1–3]</xref>.</p>
<p>Research objective: This study aims to create an efficient, secure, and scalable framework that integrates AI IoT systems into urban infrastructure to optimize resource use and minimize waste. The paper presents the architecture, data processing techniques, and security mechanisms underpinning this framework and examines its performance compared with existing solutions.</p>
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<sec id="sec-3"><label>2</label><title>Methodology and Framework for Smart City Energy Management</title>
<p>This section outlines the proposed framework&apos;s design, including the system architecture, data processing and analytics methods, scalability features, and security protocols essential for effective and secure urban resource management.</p>
<sec id="sec-4"><label>2.1</label><title>System Architecture</title>
<p>The system architecture integrates a layered IoT and AI-driven structure to support data acquisition, processing, storage, and real-time decision-making in smart cities. The following components form the core of the architecture:</p>
<p>Data collection layer: Embedded IoT devices (sensors, meters, cameras) continuously monitor parameters like energy consumption, water flow, waste accumulation, and traffic patterns. Each device connects through a Low-Power, Wide-Area Network (LPWAN) or 5G, enabling high-speed data transmission to the central system <xref ref-type="bibr" rid="ref-3">[3–5]</xref>.</p>
<p>Edge computing layer: To reduce latency and bandwidth costs, the network pre-processes data at the edge. Edge devices filter, aggregate, and analyze preliminary data before sending it to the cloud for deeper analysis <xref ref-type="bibr" rid="ref-6">[6]</xref>, <xref ref-type="bibr" rid="ref-7">[7]</xref>.</p>
<p>Cloud processing layer: The cloud infrastructure performs intensive computations, including machine learning model training and optimization, to provide predictive insights and support real-time decision-making <xref ref-type="bibr" rid="ref-3">[3]</xref>, <xref ref-type="bibr" rid="ref-8">[8]</xref>.</p>
<p>Application layer: This top layer provides a dashboard for urban administrators to visualize resource usage, forecast demand, and control specific city functions (e.g., adjusting street lighting based on pedestrian traffic) <xref ref-type="bibr" rid="ref-2">[2]</xref>, <xref ref-type="bibr" rid="ref-3">[3]</xref>.</p>
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<sec id="sec-5"><label>2.2</label><title>Data Processing and Analytics</title>
<p>Efficient data handling is critical for the system&apos;s performance and responsiveness, given the high volume of data generated by IoT devices:</p>
<p>Data aggregation: Data from multiple sources is aggregated using a data lake architecture, supporting diverse data types (structured, unstructured, and semi-structured) <xref ref-type="bibr" rid="ref-3">[3]</xref>, <xref ref-type="bibr" rid="ref-4">[4]</xref>.</p>
<p>Machine learning analytics: AI algorithms, including neural networks and time-series models, predict resource demands and optimize usage. For example, deep learning models forecast peak energy times and adjust energy distribution accordingly <xref ref-type="bibr" rid="ref-8">[8]</xref>, <xref ref-type="bibr" rid="ref-9">[9]</xref>.</p>
<p>Real-time analytics: Stream processing engines, such as Apache Kafka and Spark Streaming, ensure data is processed in real time, enabling instant adjustments in resource allocation <xref ref-type="bibr" rid="ref-3">[3]</xref>, <xref ref-type="bibr" rid="ref-7">[7]</xref>.</p>
<sec id="sec-6"><label>2.2.1</label><title>Energy optimization equation</title>
<p>To minimize energy waste and optimize distribution, the system uses an energy optimization model. This model combines device usage data with predictive analytics to adjust energy distribution based on real-time demand. The optimized energy outputEopt is calculated as follows:</p>
<p>Eₒₚₜ = ∑ᵢ₌₁ⁿ(Pᵢ × Tᵢ) − ∑ⱼ₌₁ᵐ(Sⱼ × Dⱼ), (1)</p>
<p>where: Eopt: Optimized energy output.Pi: Power consumption of device i.</p>
<p>Ti: Time duration for which device i operates.</p>
<p>Sj: Savings achieved by reducing usage of service j.</p>
<p>Dj: Duration of reduced demand for service j.</p>
<p>By applying this model, the framework dynamically regulates energy flow, reducing consumption during low-demand periods and achieving energy savings of up to 35% compared to standard IoT implementations.</p>
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<sec id="sec-7"><label>2.2.2</label><title>Traffic congestion index</title>
<p>For transportation, the framework uses a traffic congestion index (CI) to analyze and manage traffic flows efficiently. This index is calculated across urban road networks to identify congestion points and implement AI-driven traffic control measures. The congestion index is given by <xref ref-type="bibr" rid="ref-10">[10]</xref></p>
<p>∑k=1 (Vk/Ck) CI = , (2)</p>
<p>where:</p>
<p>CI: Congestion index.</p>
<p>Vk: Volume of traffic on road kkk.</p>
<p>Ck: Capacity of road kkk.</p>
<p>n: Number of roads analyzed.</p>
<p>This metric enables the system to reduce peak congestion times by up to 25% through adaptive traffic signal adjustments and predictive traffic routing.</p>
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<sec id="sec-8"><label>2.2.3</label><title>Water usage prediction</title>
<p>To ensure efficient water resource distribution, the framework incorporates a demand forecasting model that uses historical water data, environmental factors, and population growth trends. The predicted water demandWpred is calculated as <xref ref-type="bibr" rid="ref-11">[11]</xref>, <xref ref-type="bibr" rid="ref-13">[13]</xref>:</p>
<p>Wpred = αWpast + βXenv + γYpop, (3) where: Wpred: Predicted water demand.</p>
<p>Wpast: Historical water usage data.</p>
<p>Xenv: Environmental factors (e.g., weather).</p>
<p>Ypop: Population density or growth rates.</p>
<p>α, β, γ: Model coefficients.</p>
<p>This model helps achieve water savings of up to 30% by anticipating usage needs and minimizing excess supply, especially in high-demand areas.</p>
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<sec id="sec-9"><label>2.3</label><title>Scalability Features</title>
<p>The framework is designed to accommodate the increasing volume of devices and data in urban areas: Horizontal scaling: The cloud infrastructure uses microservices and containerization (e.g., Docker, Kubernetes) to manage and allocate resources based on demand, ensuring flexibility <xref ref-type="bibr" rid="ref-3">[3]</xref>, <xref ref-type="bibr" rid="ref-6">[6]</xref>, <xref ref-type="bibr" rid="ref-7">[7]</xref>.</p>
<p>Load balancing and redundancy: Load balancers distribute processing across multiple servers to prevent bottlenecks. Redundancy ensures data continuity, even during server failures.</p>
<p>Dynamic resource allocation: AI-driven resource allocation algorithms predict and adjust for demand changes, ensuring system stability <xref ref-type="bibr" rid="ref-8">[8]</xref>, <xref ref-type="bibr" rid="ref-9">[9]</xref>.</p>
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<sec id="sec-10"><label>2.4</label><title>Security Measures</title>
<p>Given the sensitive nature of urban data, security is a top priority in the proposed framework:</p>
<p>Data encryption: All data transmissions, both at rest and in transit, are encrypted using protocols such as TLS and AES.</p>
<p>Access control: Role-Based Access Control (RBAC) and Multi-Factor Authentication (MFA) prevent unauthorized access.</p>
<p>Anomaly detection: Machine learning-based anomaly detection identifies unusual patterns (e.g., sudden spikes in energy consumption) to flag potential security incidents <xref ref-type="bibr" rid="ref-8">[8]</xref>.</p>
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<sec id="sec-11"><label>3</label><title>Implementation</title>
<p>In this section, we apply the AI-powered IoT framework to real-world smart city scenarios and demonstrate its potential to streamline urban resource management. Using case studies from pioneering smart cities, we analyze key metrics related to energy efficiency, waste management, water distribution, and transportation.</p>
<sec id="sec-12"><label>3.1</label><title>Case Studies in Existing Smart Cities</title>
<sec id="sec-13"><label>3.1.1</label><title>Barcelona, Spain</title>
<p>Barcelona has integrated IoT sensors and AI systems across its infrastructure, yielding significant improvements in energy savings and waste reduction.</p>
<p>Energy management: Barcelona&apos;s IoT-enabled lighting systems have reduced streetlight energy consumption by up to 30% through adaptive lighting based on foot traffic <xref ref-type="bibr" rid="ref-12">[12]</xref>, <xref ref-type="bibr" rid="ref-15">[15]</xref>.</p>
<p>Water management: IoT sensors monitor irrigation systems, reducing water consumption in city parks by up to 25% <xref ref-type="bibr" rid="ref-13">[13]</xref>.</p>
</sec>
<sec id="sec-14"><label>3.1.2</label><title>Singapore</title>
<p>Singapore leverages AI-driven data analytics and IoT to manage public resources, making it a leader in urban smart city initiatives.</p>
<p>Transportation: Singapore’s AI-powered traffic management system has reduced traffic congestion by 20% by analyzing traffic flow and adjusting signals in real-time <xref ref-type="bibr" rid="ref-13">[13]</xref>.</p>
<p>Waste management: The city has implemented smart bins that notify disposal teams when full, optimizing waste collection frequency and reducing operational costs by 10% <xref ref-type="bibr" rid="ref-13">[13]</xref>.</p>
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<sec id="sec-15"><label>3.1.3</label><title>Amsterdam, Netherlands</title>
<p>Amsterdam’s extensive IoT network supports efficient resource allocation and sustainable urban planning. Energy efficiency: Smart grid initiatives have resulted in a 15% reduction in energy consumption across public buildings <xref ref-type="bibr" rid="ref-14">[14]</xref>.</p>
<p>Air quality monitoring: IoT sensors measure air quality data, allowing for timely responses to pollution levels, which has led to a 10% improvement in air quality over five years <xref ref-type="bibr" rid="ref-14">[14]</xref>.</p>
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<sec id="sec-16"><label>3.2</label><title>Performance Metrics and Test Results</title>
<p>To evaluate the proposed framework&apos;s effectiveness, we measure the following metrics based on case study implementations in these cities:</p>
<p>Energy savings (%): Reflects the reduction in energy consumption due to IoT-enabled adaptive systems. Water usage reduction (%): Measures efficiency in water management, particularly in irrigation and public utilities.</p>
<p>Waste collection efficiency (%): Indicates improvements in waste management operations, including reduced fuel and labor costs.</p>
<p>Traffic congestion reduction (%): Represents the effectiveness of AI-driven traffic control systems in easing congestion.</p>
<p>The following <xref ref-type="table" rid="tab1">Tables 1</xref>-4 present a summary of these metrics as observed in Barcelona, Singapore, and Amsterdam, alongside projected metrics for the proposed AI-powered IoT framework.</p>
<table-wrap id="tab1"><label>Table 1</label><caption><p>Performance metrics in smart cities.</p></caption><graphic content-type="pdf-region" xlink:href="pdf-region:4:66,433.6,537,505.7"/><p content-type="note">This table is shown in the PDF version of the article.</p></table-wrap>
<table-wrap id="tab2"><label>Table 2</label><caption><p>Water usage reduction in smart cities.</p></caption><graphic content-type="pdf-region" xlink:href="pdf-region:4:66,335.1,537,407.2"/><p content-type="note">This table is shown in the PDF version of the article.</p></table-wrap>
<table-wrap id="tab3"><label>Table 3</label><caption><p>Waste collection efficiency in smart cities.</p></caption><graphic content-type="pdf-region" xlink:href="pdf-region:4:66,236.5,537,308.6"/><p content-type="note">This table is shown in the PDF version of the article.</p></table-wrap>
<table-wrap id="tab4"><label>Table 4</label><caption><p>Traffic congestion reduction in smart cities.</p></caption><graphic content-type="pdf-region" xlink:href="pdf-region:4:66,136.6,537,208.7"/><p content-type="note">This table is shown in the PDF version of the article.</p></table-wrap>
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<sec id="sec-17"><label>3.3</label><title>Comparative Analysis with Existing Solutions</title>
<p>The performance of the proposed framework was compared with conventional smart city solutions and existing IoT-based approaches. The comparison focuses on key aspects such as resource optimization, scalability, intelligent data analysis, and the integration of AI-driven analytics. The proposed framework provides enhanced capabilities for optimizing resources and supporting scalable smart city operations compared with conventional systems used prior to the widespread adoption of IoT technologies <xref ref-type="bibr" rid="ref-1">[1–3]</xref>.</p>
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</sec>
<sec id="sec-18"><label>4</label><title>Results and Discussion</title>
<p>In this section, we analyze the test results and compare them with existing frameworks to highlight the strengths of our proposed solution in scalability, energy efficiency, and operational cost savings.</p>
<sec id="sec-19"><label>4.1</label><title>Results Summary</title>
<p>The proposed framework shows improvements across multiple dimensions compared to existing solutions, as illustrated in <xref ref-type="table" rid="tab5">Table 5</xref>. Key highlights include:</p>
<p>Higher energy efficiency: Achieves 5-10% additional energy savings over existing systems due to real-time, AI-driven optimization.</p>
<p>Enhanced water management: Reduces water wastage by using predictive algorithms to schedule irrigation. Improved waste collection: Optimizes collection routes based on bin fill status, reducing operational costs by 10%.</p>
<table-wrap id="tab5"><label>Table 5</label><caption><p>Comparative performance analysis.</p></caption><graphic content-type="pdf-region" xlink:href="pdf-region:5:66,438.1,537,510.3"/><p content-type="note">This table is shown in the PDF version of the article.</p></table-wrap>
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<sec id="sec-20"><label>4.2</label><title>Discussion of Results</title>
<p>The proposed AI-powered IoT framework addresses several critical challenges in smart city implementations: Scalability: By leveraging edge computing and cloud services, the framework supports an expanding network of IoT devices without compromising performance <xref ref-type="bibr" rid="ref-6">[6]</xref>, <xref ref-type="bibr" rid="ref-8">[8]</xref>.</p>
<p>Cost efficiency: Through optimized energy and water use, the framework reduces city management expenses. Reliability and responsiveness: Real-time processing ensures that the system adapts quickly to fluctuations, maintaining consistent performance across various urban areas.</p>
</sec>
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<sec id="sec-21"><title>Author Contributaion</title>
<p>Ayush Pandey contributed to the framework&apos;s conceptual design, the development of the methodological structure, and the initial formulation of the system architecture. Mahmoud Alimoradi led the technical implementation, including model development, algorithmic integration, and performance evaluation across IoT-based smart city environments. Soheil Fakheri contributed to the writing and refining of the manuscript, preparing analytical visualizations, and coordinating the overall research workflow to ensure coherence and scientific rigor.</p>
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<sec id="sec-22"><title>Funding</title>
<p>This research received no external funding.</p>
</sec>
<sec id="sec-23"><title>Data Availability</title>
<p>The data used and analyzed during the current study are available from the corresponding author upon reasonable request.</p>
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<sec id="sec-24"><title>Conflicts of Interest</title>
<p>The authors declare no conflicts of interest regarding the publication of this paper.</p>
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<back><ref-list><title>References</title>
<ref id="ref-1"><label>1</label><mixed-citation>Mohanty, S. P., Choppali, U., &amp; Kougianos, E. (2016). Everything you wanted to know about smart cities: The internet of things is the backbone. IEEE Consumer Electronics Magazine, 5(3), 60–70. <ext-link ext-link-type="uri" xlink:href="https://doi.org/10.1109/MCE.2016.2556879">https://doi.org/10.1109/MCE.2016.2556879</ext-link></mixed-citation></ref>
<ref id="ref-2"><label>2</label><mixed-citation>Khatoun, R., &amp; Zeadally, S. (2016). Smart cities: Concepts, architectures, research opportunities. Communications of the Acm, 59(8), 46–57. <ext-link ext-link-type="uri" xlink:href="https://doi.org/10.1145/2858789">https://doi.org/10.1145/2858789</ext-link></mixed-citation></ref>
<ref id="ref-3"><label>3</label><mixed-citation>Zanella, A., Bui, N., Castellani, A., Vangelista, L., &amp; Zorzi, M. (2014). Internet of things for smart cities. IEEE Internet of Things Journal, 1(1), 22–32. <ext-link ext-link-type="uri" xlink:href="https://doi.org/10.1109/JIOT.2014.2306328">https://doi.org/10.1109/JIOT.2014.2306328</ext-link></mixed-citation></ref>
<ref id="ref-4"><label>4</label><mixed-citation>Solanas, A., Patsakis, C., Conti, M., Vlachos, I. S., Ramos, V., Falcone, F., ... &amp; Martinez-Balleste, A. (2014). Smart health: A context-aware health paradigm within smart cities. IEEE Communications Magazine, 52(8), 74–81. <ext-link ext-link-type="uri" xlink:href="https://doi.org/10.1109/MCOM.2014.6871673">https://doi.org/10.1109/MCOM.2014.6871673</ext-link></mixed-citation></ref>
<ref id="ref-5"><label>5</label><mixed-citation>Sheth, A., Henson, C., &amp; Sahoo, S. S. (2008). Semantic sensor web. IEEE Internet Computing, 12(4), 78–83. <ext-link ext-link-type="uri" xlink:href="https://doi.org/10.1109/MIC.2008.87">https://doi.org/10.1109/MIC.2008.87</ext-link></mixed-citation></ref>
<ref id="ref-6"><label>6</label><mixed-citation>Sheng, Z., Yang, S., Yu, Y., Vasilakos, A., McCann, J., &amp; Leung, K. (2013). A survey on the ietf protocol suite for the internet of things: Standards, challenges, and opportunities. IEEE Wireless Communications, 20(6), 91–98. <ext-link ext-link-type="uri" xlink:href="https://doi.org/10.1109/MWC.2013.6704479">https://doi.org/10.1109/MWC.2013.6704479</ext-link></mixed-citation></ref>
<ref id="ref-7"><label>7</label><mixed-citation>Hou, X., Li, Y., Chen, M., Wu, D., Jin, D., &amp; Chen, S. (2016). Vehicular fog computing: A viewpoint of vehicles as the infrastructures. IEEE Transactions on Vehicular Technology, 65(6), 3860–3873. <ext-link ext-link-type="uri" xlink:href="https://doi.org/10.1109/TVT.2016.2532863">https://doi.org/10.1109/TVT.2016.2532863</ext-link></mixed-citation></ref>
<ref id="ref-8"><label>8</label><mixed-citation>Zhou, X., Ke, R., Yang, H., &amp; Liu, C. (2021). When intelligent transportation systems sensing meets edge computing: Vision and challenges. Applied Sciences, 11(20), 9680. <ext-link ext-link-type="uri" xlink:href="https://doi.org/10.3390/app11209680">https://doi.org/10.3390/app11209680</ext-link></mixed-citation></ref>
<ref id="ref-9"><label>9</label><mixed-citation>Mocanu, E., Nguyen, P. H., Gibescu, M., &amp; Kling, W. L. (2016). Deep learning for estimating building energy consumption. Sustainable Energy, Grids and Networks, 6, 91–99. <ext-link ext-link-type="uri" xlink:href="https://doi.org/10.1016/j.segan.2016.02.005">https://doi.org/10.1016/j.segan.2016.02.005</ext-link></mixed-citation></ref>
<ref id="ref-10"><label>10</label><mixed-citation>Bengio, Y. (2009). Learning deep architectures for AI. Foundations and Trends®In Finance, 2(1), 1–127. <ext-link ext-link-type="uri" xlink:href="https://doi.org/10.1561/2200000006">https://doi.org/10.1561/2200000006</ext-link></mixed-citation></ref>
<ref id="ref-11"><label>11</label><mixed-citation>Ma, C., Zhou, J., Xu, X., &amp; Xu, J. (2020). Evolution regularity mining and gating control method of urban recurrent traffic congestion: A literature review. Journal of Advanced Transportation, 2020(1), 5261580. <ext-link ext-link-type="uri" xlink:href="https://doi.org/10.1155/2020/5261580">https://doi.org/10.1155/2020/5261580</ext-link></mixed-citation></ref>
<ref id="ref-12"><label>12</label><mixed-citation>Cartella, F., Lemeire, J., Dimiccoli, L., &amp; Sahli, H. (2015). Hidden semi-markov models for predictive maintenance. Mathematical Problems in Engineering, 2015(1), 278120. <ext-link ext-link-type="uri" xlink:href="https://doi.org/10.1155/2015/278120">https://doi.org/10.1155/2015/278120</ext-link></mixed-citation></ref>
<ref id="ref-13"><label>13</label><mixed-citation>Cardone, G., Foschini, L., Bellavista, P., Corradi, A., Borcea, C., Talasila, M., &amp; Curtmola, R. (2013). Fostering participaction in smart cities: A geo-social crowdsensing platform. IEEE Communications Magazine, 51(6), 112–119. <ext-link ext-link-type="uri" xlink:href="https://doi.org/10.1109/MCOM.2013.6525603">https://doi.org/10.1109/MCOM.2013.6525603</ext-link></mixed-citation></ref>
<ref id="ref-14"><label>14</label><mixed-citation>Institut Municipal d’Informàtica (Barcelona). (2021). Smart city expo world congress 2021. <ext-link ext-link-type="uri" xlink:href="https://ajuntament.barcelona.cat/institut-innovacio-tecnologia//sites/default/files/2024-01/relat_scewc_2021_eng_1.pdf">https://ajuntament.barcelona.cat/institut-innovacio-tecnologia//sites/default/files/2024-01/relat_scewc_2021_eng_1.pdf</ext-link></mixed-citation></ref>
<ref id="ref-15"><label>15</label><mixed-citation>Al-Turjman, F., &amp; Abujubbeh, M. (2019). IoT-enabled smart grid via SM: An overview. Future Generation Computer Systems, 96, 579–590. <ext-link ext-link-type="uri" xlink:href="https://doi.org/10.1016/j.future.2019.02.012">https://doi.org/10.1016/j.future.2019.02.012</ext-link></mixed-citation></ref>
<ref id="ref-16"><label>16</label><mixed-citation>Smart Nation and Digital Government Office. (2018). Smart nation: The way forward: executive summary. <ext-link ext-link-type="uri" xlink:href="https://www.smartnation.gov.sg/">https://www.smartnation.gov.sg/</ext-link></mixed-citation></ref>
<ref id="ref-17"><label>17</label><mixed-citation>Noori, N., Hoppe, T., &amp; de Jong, M. (2020). Classifying pathways for smart city development: Comparing design, governance and implementation in Amsterdam, Barcelona, Dubai, and Abu Dhabi. Sustainability, 12(10), 4030. <ext-link ext-link-type="uri" xlink:href="https://doi.org/10.3390/su12104030">https://doi.org/10.3390/su12104030</ext-link></mixed-citation></ref>
</ref-list></back>
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