{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,25]],"date-time":"2026-03-25T23:05:59Z","timestamp":1774479959820,"version":"3.50.1"},"reference-count":64,"publisher":"MDPI AG","issue":"6","license":[{"start":{"date-parts":[[2025,6,12]],"date-time":"2025-06-12T00:00:00Z","timestamp":1749686400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Computers"],"abstract":"<jats:p>Air pollution poses a serious threat to both public health and the environment, contributing to millions of premature deaths worldwide each year. The integration of augmented reality (AR), blockchain, and the Internet of Things (IoT) technologies can provide a transformative approach to collaborative air quality monitoring (AQM), enabling real-time, transparent, and intuitive access to environmental data for community awareness, behavioural change, informed decision-making, and proactive responses to pollution challenges. This article presents a unified vision of the key elements and technologies to consider when designing such AQM systems, allowing dynamic and user-friendly immersive air quality data visualization interfaces, secure and trusted data storage, fine-grained data collection through crowdsourcing, and active community learning and participation. It serves as a conceptual basis for any design and implementation of such systems.<\/jats:p>","DOI":"10.3390\/computers14060231","type":"journal-article","created":{"date-parts":[[2025,6,12]],"date-time":"2025-06-12T06:42:48Z","timestamp":1749710568000},"page":"231","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Immersive, Secure, and Collaborative Air Quality Monitoring"],"prefix":"10.3390","volume":"14","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-8687-8364","authenticated-orcid":false,"given":"Jos\u00e9","family":"Marinho","sequence":"first","affiliation":[{"name":"Coimbra Institute of Engineering, Polytechnic University of Coimbra, 3045-093 Coimbra, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3397-6793","authenticated-orcid":false,"given":"Nuno","family":"Cid Martins","sequence":"additional","affiliation":[{"name":"Coimbra Institute of Engineering, Polytechnic University of Coimbra, 3045-093 Coimbra, Portugal"}]}],"member":"1968","published-online":{"date-parts":[[2025,6,12]]},"reference":[{"key":"ref_1","unstructured":"Academy of Science of South Africa, Brazilian Academy of Sciences, German National Academy of Sciences Leopoldina, U.S. National Academy of Medicine, and U.S. National Academy of Sciences (2019). Air Pollution and Health\u2014A Science-Policy Initiative. Ann. Glob. Health, 85, 140."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"189365","DOI":"10.1109\/ACCESS.2020.3028430","article-title":"The Merits of a Decentralized Pollution-Monitoring System Based on Distributed Ledger Technology","volume":"8","author":"Kilgus","year":"2020","journal-title":"IEEE Access"},{"key":"ref_3","doi-asserted-by":"crossref","unstructured":"Sofia, D., Lotrecchiano, N., Trucillo, P., Giuliano, A., and Terrone, L. (2020). Novel Air Pollution Measurement System Based on Ethereum Blockchain. J. Sens. Actuator Netw., 9.","DOI":"10.3390\/jsan9040049"},{"key":"ref_4","doi-asserted-by":"crossref","unstructured":"M. Bublitz, F., Oetomo, A., Sahu, K.S., Kuang, A., Fadrique, L.X., Velmovitsky, P.E., Nobrega, R.M., and Morita, P.P. (2019). Disruptive Technologies for Environment and Health Research: An Overview of Artificial Intelligence, Blockchain, and Internet of Things. Int. J. Environ. Res. Public Health, 16.","DOI":"10.3390\/ijerph16203847"},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"2300207","DOI":"10.1002\/adsr.202300207","article-title":"Advances in Air Quality Monitoring: A Comprehensive Review of Algorithms for Imaging and Sensing Technologies","volume":"3","author":"Elbestar","year":"2024","journal-title":"Adv. Sens. Res."},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"2991","DOI":"10.5194\/amt-17-2991-2024","article-title":"Mobile Air Quality Monitoring and Comparison to Fixed Monitoring Sites for Instrument Performance Assessment","volume":"17","author":"Whitehill","year":"2024","journal-title":"Atmos. Meas. Tech."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"11369","DOI":"10.1021\/es4022602","article-title":"The changing paradigm of air pollution monitoring","volume":"47","author":"Snyder","year":"2013","journal-title":"Environ. Sci. Technol."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"286","DOI":"10.1016\/j.envint.2018.04.018","article-title":"Applications of low-cost sensing technologies for air quality monitoring and exposure assessment: How far have they gone?","volume":"116","author":"Morawska","year":"2018","journal-title":"Environ. Int."},{"key":"ref_9","doi-asserted-by":"crossref","unstructured":"Marques, G., Saini, J., Dutta, M., Singh, P.K., and Hong, W.-C. (2020). Indoor Air Quality Monitoring Systems for Enhanced Living Environments: A Review toward Sustainable Smart Cities. Sustainability, 12.","DOI":"10.3390\/su12104024"},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"1","DOI":"10.17485\/ijst\/2016\/v9i39\/90414","article-title":"IoT enabled air quality monitoring system (AQMS) using raspberry Pi","volume":"9","author":"Balasubramaniyan","year":"2016","journal-title":"Indian J. Sci. Technol."},{"key":"ref_11","unstructured":"Llobet, E. (2020). Chapter 12 - Low-Cost Sensors for Outdoor Air Quality Monitoring. Advanced Nanomaterials for Inexpensive Gas Microsensors, Elsevier. Micro and Nano Technologies."},{"key":"ref_12","doi-asserted-by":"crossref","unstructured":"Andrei, N., and Ioanid, A. (2023, January 18\u201321). Potential use of artificial intelligence and geospatial analysis in environmental monitoring: Air quality in a large city. Proceedings of the International Conference of Management and Industrial Engineering, Singapore.","DOI":"10.56177\/11icmie2023.31"},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"112574","DOI":"10.1016\/j.envres.2021.112574","article-title":"IoT enabled environmental toxicology for air pollution monitoring using AI techniques","volume":"205","author":"Asha","year":"2022","journal-title":"Environ. Res."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"259","DOI":"10.1080\/10408340802378254","article-title":"The State of the Art in the Field of Non-Stationary Instruments for the Determination and Monitoring of Atmospheric Pollutants","volume":"38","author":"Wardencki","year":"2008","journal-title":"Crit. Rev. Anal. Chem."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"251","DOI":"10.1016\/j.stam.2005.02.003","article-title":"Air pollution monitoring and GIS modeling: A new use of nanotechnology based solid state gas sensors","volume":"6","author":"Pummakarnchana","year":"2005","journal-title":"Sci. Technol. Adv. Mater."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"293","DOI":"10.1016\/j.envint.2016.12.007","article-title":"Can commercial low-cost sensor platforms contribute to air quality monitoring and exposure estimates?","volume":"99","author":"Castell","year":"2017","journal-title":"Environ. Int."},{"key":"ref_17","doi-asserted-by":"crossref","unstructured":"Gerboles, M., Spinelle, L., and Signorini, M. (2015). AirSensEUR: An open data\/software\/hardware multi-sensor platform for air quality monitoring. Part A: Sensor shield. JRC Technical Report 2015, Publications Office of the European Union. EUR 27469 EN.","DOI":"10.5162\/4EuNetAir2015\/03"},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"317","DOI":"10.5194\/jsss-8-317-2019","article-title":"Measure particulate matter by yourself: Data-quality monitoring in a citizen science project","volume":"8","author":"Benabbas","year":"2019","journal-title":"J. Sens. Sens. Syst."},{"key":"ref_19","unstructured":"Nikzad, N., Verma, N., Ziftci, C., Bales, E., Quick, N., Zappi, P., Patrick, K., Dasgupta, S., Krueger, I., and Rosing, T.S. (2012, January 23\u201325). Citisense: Improving geospatial environmental assessment of air quality using a wireless personal exposure monitoring system. Proceedings of the Conference on Wireless Health, San Diego, CA, USA."},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"185","DOI":"10.1038\/sj.jea.7500388","article-title":"A review and evaluation of intraurban air pollution exposure models","volume":"15","author":"Jerrett","year":"2005","journal-title":"J. Expo. Sci. Environ. Epidemiol."},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"291","DOI":"10.5194\/amt-11-291-2018","article-title":"A machine learning calibration model using random forests to improve sensor performance for lower-cost air quality monitoring","volume":"11","author":"Zimmerman","year":"2018","journal-title":"Atmos. Meas. Tech."},{"key":"ref_22","unstructured":"Ashokkumar, S., Elango, T., Karthick, M., Sowbharnika, P., and Bhaarathi SA, S.B. (2024, January 26\u201327). IoT and Blockchain Integration for Industrial Zone Monitoring. Proceedings of the 2024 International Conference on Science Technology Engineering and Management (ICSTEM), Coimbatore, India."},{"key":"ref_23","doi-asserted-by":"crossref","unstructured":"Hassan, A.K., Saraya, M.S., Ali-Eldin, A.M., and Abdelsalam, M.M. (2024). Low-Cost IoT Air Quality Monitoring Station Using Cloud Platform and Blockchain Technology. Appl. Sci., 14.","DOI":"10.3390\/app14135774"},{"key":"ref_24","doi-asserted-by":"crossref","unstructured":"Shelke, P., Suryawanshi, T., and Siddiqui, E. (2024, January 28\u201329). Blockchain-Backed Air Quality Monitoring. Proceedings of the 2024 ASU International Conference in Emerging Technologies for Sustainability and Intelligent Systems (ICETSIS), Manama, Bahrain.","DOI":"10.1109\/ICETSIS61505.2024.10459478"},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"161","DOI":"10.1016\/j.comcom.2024.04.027","article-title":"Blockchain and Differential Privacy-Based Data Processing System for Data Security and Privacy in Urban Computing","volume":"222","author":"Heo","year":"2024","journal-title":"Comput. Commun."},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"012037","DOI":"10.1088\/1757-899X\/1105\/1\/012037","article-title":"Design and Implementation of IoT Based Environment Pollution Monitoring System: A Case Study of Iraq","volume":"Volume 1105","author":"Hussein","year":"2021","journal-title":"Proceedings of the IOP Conference Series: Materials Science and Engineering"},{"key":"ref_27","doi-asserted-by":"crossref","unstructured":"Jha, R.K. (2020, January 15\u201317). Air Quality Sensing and Reporting System Using IoT. Proceedings of the 2020 Second International Conference on Inventive Research in Computing Applications (ICIRCA), Coimbatore, India.","DOI":"10.1109\/ICIRCA48905.2020.9182796"},{"key":"ref_28","doi-asserted-by":"crossref","unstructured":"J\u00e1n\u00f3, R., Ilie\u015f, A.I., \u015ete\u0163co, E.M., and Corches, C. (2024, January 16\u201318). IoT Devices for Monitoring and Analysing Air Quality in Urban Environments. Proceedings of the 2024 IEEE 30th International Symposium for Design and Technology in Electronic Packaging (SIITME), Sibiu, Romania.","DOI":"10.1109\/SIITME63973.2024.10814899"},{"key":"ref_29","doi-asserted-by":"crossref","unstructured":"Ert\u00fcrk, M.A., Ayd\u0131n, M.A., B\u00fcy\u00fckakka\u015flar, M.T., and Evirgen, H. (2019). A Survey on LoRaWAN Architecture, Protocol and Technologies. Future Internet, 11.","DOI":"10.3390\/fi11100216"},{"key":"ref_30","doi-asserted-by":"crossref","unstructured":"Hassan, M.B., Ali, E.S., Mokhtar, R.A., Saeed, R.A., and Chaudhari, B.S. (2020). NB-IoT: Concepts, Applications, and Deployment Challenges. LPWAN Technologies for IoT and M2M Applications, Elsevier.","DOI":"10.1016\/B978-0-12-818880-4.00006-5"},{"key":"ref_31","doi-asserted-by":"crossref","unstructured":"Fourtet, C., and Ponsard, B. (2020). An Introduction to Sigfox Radio System. LPWAN Technologies for IoT and M2M Applications, Elsevier.","DOI":"10.1016\/B978-0-12-818880-4.00005-3"},{"key":"ref_32","doi-asserted-by":"crossref","unstructured":"McGrath, S., Flanagan, C., Zeng, L., and O\u2019leary, C. (2020, January 11\u201312). IoT Personal Air Quality Monitor. Proceedings of the 2020 31st Irish Signals and Systems Conference (ISSC), Letterkenny, Ireland.","DOI":"10.1109\/ISSC49989.2020.9180199"},{"key":"ref_33","doi-asserted-by":"crossref","unstructured":"Iqbal, M., Abdullah, A.Y.M., and Shabnam, F. (2020, January 5\u20137). An Application Based Comparative Study of LPWAN Technologies for IoT Environment. Proceedings of the 2020 IEEE Region 10 Symposium (TENSYMP), Dhaka, Bangladesh.","DOI":"10.1109\/TENSYMP50017.2020.9230597"},{"key":"ref_34","doi-asserted-by":"crossref","first-page":"100540","DOI":"10.1016\/j.iot.2022.100540","article-title":"LoRaWAN-Based IoT System Implementation for Long-Range Outdoor Air Quality Monitoring","volume":"19","author":"Jabbar","year":"2022","journal-title":"Internet Things"},{"key":"ref_35","doi-asserted-by":"crossref","unstructured":"Muppalla, A.R., Pathakoti, M., Bothale, V.M., Biswadip, G., Sai, M.S., Subramanian, V., and Rajan, K. (2019, January 17\u201320). Design and Implementation of IoT Solution for Air Pollution Monitoring. Proceedings of the 2019 IEEE Recent Advances in Geoscience and Remote Sensing: Technologies, Standards and Applications (TENGARSS), Kochi, India.","DOI":"10.1109\/TENGARSS48957.2019.8976041"},{"key":"ref_36","unstructured":"Yesindan, R., Sangiya, S., Valluvan, R., Mukunthan, T., Ahilan, K., and Pravina, M. (2024, January 12\u201314). NB-AirStream: Advancing Air Quality Monitoring with LoRa and NB-IoT Integration. Proceedings of the 2024 IEEE International Conference on Electronics, Computing and Communication Technologies (CONECCT), Bangalore, India."},{"key":"ref_37","doi-asserted-by":"crossref","unstructured":"Duangsuwan, S., Takarn, A., and Jamjareegulgarn, P. (2018, January 26\u201329). A Development on Air Pollution Detection Sensors Based on NB-IoT Network for Smart Cities. Proceedings of the 2018 18th International Symposium on Communications and Information Technologies (ISCIT), Bangkok, Thailand.","DOI":"10.1109\/ISCIT.2018.8587978"},{"key":"ref_38","doi-asserted-by":"crossref","unstructured":"Brotzu, R., Aru, P., Fadda, M., and Giusto, D. (2021, January 4\u20136). Urban SigFox-Based Mobility System. Proceedings of the 2021 IEEE International Symposium on Broadband Multimedia Systems and Broadcasting (BMSB), Chengdu, China.","DOI":"10.1109\/BMSB53066.2021.9547120"},{"key":"ref_39","unstructured":"Nakamoto, S. (2008). Bitcoin: A Peer-to-Peer Electronic Cash System, United States Sentencing Commission."},{"key":"ref_40","doi-asserted-by":"crossref","first-page":"39066","DOI":"10.1109\/ACCESS.2023.3267047","article-title":"A Survey on Consensus Algorithms in Blockchain-Based Applications: Architecture, Taxonomy, and Operational Issues","volume":"11","author":"Islam","year":"2023","journal-title":"IEEE Access"},{"key":"ref_41","first-page":"354","article-title":"An Analysis of Decentralised Systems in Environment-Related Projects: Theoretical and Practical Perspective","volume":"5","author":"Vaccargiu","year":"2024","journal-title":"Comput. Sci."},{"key":"ref_42","doi-asserted-by":"crossref","unstructured":"Wang, S., Yuan, Y., Wang, X., Li, J., Qin, R., and Wang, F.-Y. (2018, January 26\u201330). An Overview of Smart Contract: Architecture, Applications, and Future Trends. Proceedings of the 2018 IEEE Intelligent Vehicles Symposium (IV), Changshu, China.","DOI":"10.1109\/IVS.2018.8500488"},{"key":"ref_43","doi-asserted-by":"crossref","first-page":"46","DOI":"10.54254\/2755-2721\/48\/20241132","article-title":"Design, Development, and Deployment of Decentralized Applications","volume":"48","author":"Chen","year":"2024","journal-title":"Appl. Comput. Eng."},{"key":"ref_44","doi-asserted-by":"crossref","unstructured":"Santos, A.F., Marinho, J., and Bernardino, J. (2023). Blockchain-Based Loyalty Management System. Future Internet, 15.","DOI":"10.3390\/fi15050161"},{"key":"ref_45","doi-asserted-by":"crossref","first-page":"168455","DOI":"10.1109\/ACCESS.2021.3136860","article-title":"Coalition of 6G and Blockchain in AR\/VR Space: Challenges and Future Directions","volume":"9","author":"Bhattacharya","year":"2021","journal-title":"IEEE Access"},{"key":"ref_46","doi-asserted-by":"crossref","first-page":"7","DOI":"10.1109\/MIC.2022.3209804","article-title":"Toward Decentralized Cloud Storage with IPFS: Opportunities, Challenges, and Future Considerations","volume":"26","author":"Doan","year":"2022","journal-title":"IEEE Internet Comput."},{"key":"ref_47","doi-asserted-by":"crossref","unstructured":"Pokri\u0107, B., Kr\u010do, S., Pokri\u0107, M., Kne\u017eevi\u0107, P., and Jovanovi\u0107, D. (2015, January 7\u20139). Engaging Citizen Communities in Smart Cities Using IoT, Serious Gaming and Fast Markerless Augmented Reality. Proceedings of the 2015 International Conference on Recent Advances in Internet of Things (RIoT), Singapore.","DOI":"10.1109\/RIOT.2015.7104905"},{"key":"ref_48","doi-asserted-by":"crossref","unstructured":"Renault, S., Feldmann, I., Raes, L., Silence, J., and Schreer, O. (2024, January 2\u20134). Dynamic Exposure Visualization of Air Quality Data with Augmented Reality. Proceedings of the 10th International Conference on Geographical Information Systems Theory, Applications and Management (GISTAM), Angers, France.","DOI":"10.5220\/0012586700003696"},{"key":"ref_49","first-page":"389","article-title":"Augmented Reality for Air Quality Monitoring: Case Study in the Marche Region (Italy)","volume":"48","author":"Fratini","year":"2024","journal-title":"Int. Arch. Photogramm. Remote Sens. Spat. Inf. Sci."},{"key":"ref_50","doi-asserted-by":"crossref","unstructured":"Fiore, M., Gattullo, M., Mongiello, M., and Uva, A. (2024, January 16\u201321). Merging Blockchain and Augmented Reality for an Immersive Traceability Platform. Proceedings of the 2024 IEEE Conference on Virtual Reality and 3D User Interfaces Abstracts and Workshops (VRW), Orlando, FL, USA.","DOI":"10.1109\/VRW62533.2024.00263"},{"key":"ref_51","doi-asserted-by":"crossref","unstructured":"Syed, T.A., Jan, S., Siddiqui, M.S., Alzahrani, A., Nadeem, A., Ali, A., and Ullah, A. (2022). CAR-Tourist: An Integrity-Preserved Collaborative Augmented Reality Framework-Tourism as a Use-Case. Appl. Sci., 12.","DOI":"10.3390\/app122312022"},{"key":"ref_52","doi-asserted-by":"crossref","unstructured":"Borges, H., Andrade, D., Silva, J.N., and Correia, M. (2023, January 1\u20133). TrustGlass: Human-Computer Trusted Paths with Augmented Reality Smart Glasses. Proceedings of the 2023 IEEE 22nd International Conference on Trust, Security and Privacy in Computing and Communications (TrustCom), Exeter, UK.","DOI":"10.1109\/TrustCom60117.2023.00106"},{"key":"ref_53","doi-asserted-by":"crossref","unstructured":"Martins, N.C., Ara\u00fajo, T., Marques, B., Rafael, S., Dias, P., and Santos, B.S. (2024, January 22\u201326). Navigating A(i)R Quality with Situated Visualization. Proceedings of the 2024 28th International Conference Information Visualisation (IV), Coimbra, Portugal.","DOI":"10.1109\/IV64223.2024.00016"},{"key":"ref_54","doi-asserted-by":"crossref","unstructured":"Fernandes, J., Brand\u00e3o, T., Almeida, S.M., and Santana, P. (2023). An Educational Game to Teach Children about Air Quality Using Augmented Reality and Tangible Interaction with Sensors. Int. J. Environ. Res. Public Health, 20.","DOI":"10.3390\/ijerph20053814"},{"key":"ref_55","doi-asserted-by":"crossref","unstructured":"Katsiokalis, M., Tsekeri, E., Lilli, A., Gobakis, K., Kolokotsa, D., and Mania, K. (2023, January 12\u201315). GoNature AR: Air Quality & Noise Visualization Through a Multimodal and Interactive Augmented Reality Experience. Proceedings of the 2023 ACM International Conference on Interactive Media Experiences (IMX), Nantes, France.","DOI":"10.1145\/3573381.3597229"},{"key":"ref_56","doi-asserted-by":"crossref","unstructured":"Mathews, N.S., Chimalakonda, S., and Jain, S. (2021, January 24\u201329). Air: An Augmented Reality Application for Visualizing Air Pollution. Proceedings of the 2021 IEEE Visualization Conference (VIS), Orleans, LA, USA.","DOI":"10.1109\/VIS49827.2021.9623287"},{"key":"ref_57","doi-asserted-by":"crossref","unstructured":"Chen, J.Y.C., and Fragomeni, G. (2021). A Survey on Applications of Augmented, Mixed and Virtual Reality for Nature and Environment. Virtual, Augmented and Mixed Reality, Springer International Publishing.","DOI":"10.1007\/978-3-030-77599-5"},{"key":"ref_58","doi-asserted-by":"crossref","unstructured":"Torres, N.G., and Campbell, P.E. (2019, January 28). Aire: Visualize Air Quality. Proceedings of the ACM SIGGRAPH 2019 Appy Hour, Los Angeles, CA, USA.","DOI":"10.1145\/3305365.3329869"},{"key":"ref_59","doi-asserted-by":"crossref","unstructured":"Hiran, K.K., Doshi, R., and Patel, M. (2024). Modern Technology in Healthcare and Medical Education: Blockchain, IoT, AR, and VR: Blockchain, IoT, AR, and VR, IGI Global.","DOI":"10.4018\/979-8-3693-5493-3"},{"key":"ref_60","doi-asserted-by":"crossref","unstructured":"Rane, N., Choudhary, S., and Rane, J. (2023). Enhanced Product Design and Development Using Artificial Intelligence (AI), Virtual Reality (VR), Augmented Reality (AR), 4D\/5d\/6d Printing, Internet of Things (IOT), and Blockchain: A Review. SSRN Electron. J., 4644059.","DOI":"10.2139\/ssrn.4644059"},{"key":"ref_61","doi-asserted-by":"crossref","unstructured":"Rane, N., Choudhary, S., and Rane, J. (2023). Sustainable Tourism Development Using Leading-Edge Artificial Intelligence (AI), Blockchain, Internet of Things (IoT), Augmented Reality (AR) and Virtual Reality (VR) Technologies. SSRN Electron. J., 4642605.","DOI":"10.2139\/ssrn.4642605"},{"key":"ref_62","doi-asserted-by":"crossref","unstructured":"Mokrani, H., Lounas, R., Bennai, M.T., Salhi, D.E., and Djerbi, R. (2019, January 9\u201311). Air Quality Monitoring Using Iot: A Survey. Proceedings of the 2019 IEEE International Conference on Smart Internet of Things (SmartIoT), Tianjin, China.","DOI":"10.1109\/SmartIoT.2019.00028"},{"key":"ref_63","doi-asserted-by":"crossref","unstructured":"Nandanwar, H., and Chauhan, A. (2021, January 27\u201329). Iot Based Smart Environment Monitoring Systems: A Key to Smart and Clean Urban Living Spaces. Proceedings of the 2021 Asian Conference on Innovation in Technology (ASIANCON), Pune, India.","DOI":"10.1109\/ASIANCON51346.2021.9544596"},{"key":"ref_64","doi-asserted-by":"crossref","unstructured":"Nielsen, J. (1994, January 24\u201328). Enhancing the Explanatory Power of Usability Heuristics. Proceedings of the SIGCHI conference on Human Factors in Computing Systems, Boston, MA, USA.","DOI":"10.1145\/191666.191729"}],"container-title":["Computers"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/2073-431X\/14\/6\/231\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,9]],"date-time":"2025-10-09T17:50:34Z","timestamp":1760032234000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/2073-431X\/14\/6\/231"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2025,6,12]]},"references-count":64,"journal-issue":{"issue":"6","published-online":{"date-parts":[[2025,6]]}},"alternative-id":["computers14060231"],"URL":"https:\/\/doi.org\/10.3390\/computers14060231","relation":{},"ISSN":["2073-431X"],"issn-type":[{"value":"2073-431X","type":"electronic"}],"subject":[],"published":{"date-parts":[[2025,6,12]]}}}