Results 41 to 50 of about 1,100,520 (348)

Establishing A Sustainable Low-Cost Air Quality Monitoring Setup: A Survey of the State-of-the-Art

Italian National Conference on Sensors, 2022
Low-cost sensors (LCS) are becoming popular for air quality monitoring (AQM). They promise high spatial and temporal resolutions at low-cost. In addition, citizen science applications such as personal exposure monitoring can be implemented effortlessly ...
M. V. Narayana, D. Jalihal, S. S. Nagendra   +2 more
semanticscholar   +1 more source

Use of Association Algorithms in Air Quality Monitoring

, 2023
Over the years, there has been a gradual increase in the emission of pollutants, and it is imperative to establish mechanisms to monitor air quality. In addition to carbon dioxide (CO2), particulate matter (PM) is considered one of the main types of air ...
Johny Paulo Monteiro, Cid Marcos Gonçalves Andrade, Luciano Ogiboski, Paulo Henrique Soares, Fernando José Gaioto   +4 more
core   +1 more source

Particle Number Concentration: A Case Study for Air Quality Monitoring [PDF]

, 2022
Particle matter is one of the criteria air pollutants which have the most considerable effect on human health in cities. Its legislation and regulation are mostly based on mass.
Imre Salma, Thén, Wanda, Wanda Thén, Salma, Imre   +3 more
core   +1 more source

The CarbonTracker Data Assimilation System for CO₂ and δ¹³C (CTDAS-C13 v1.0): retrieving information on land–atmosphere exchange processes [PDF]

Geoscientific Model Development, 2018
To improve our understanding of the global carbon balance and its representation in terrestrial biosphere models, we present here a first dual-species application of the CarbonTracker Data Assimilation System (CTDAS).
I. R. van der Velde, I. R. van der Velde, I. R. van der Velde, J. B. Miller, M. K. van der Molen, P. P. Tans, B. H. Vaughn, J. W. C. White, K. Schaefer, W. Peters, W. Peters   +10 more
doaj   +1 more source

Handling Complex Missing Data Using Random Forest Approach for an Air Quality Monitoring Dataset: A Case Study of Kuwait Environmental Data (2012 to 2018)

International Journal of Environmental Research and Public Health, 2021
In environmental research, missing data are often a challenge for statistical modeling. This paper addressed some advanced techniques to deal with missing values in a data set measuring air quality using a multiple imputation (MI) approach.
Ahmad R. Alsaber, Jiazhu Pan, A. Al-Hurban   +2 more
semanticscholar   +1 more source

Evaluating machine learning model performance in a two-step colocation process for TVOC and BTEX sensor calibration [PDF]

Atmospheric Measurement Techniques
Calibration of low-cost air quality sensors (LCSs) for total volatile organic compound (TVOC) and benzene, toluene, ethylbenzene, and xylenes (BTEX) quantification remains challenging due to the sensors' cross-sensitivity to temperature and humidity and ...
C. Frischmon, J. Porter, E. Balagopalan, W. Senga, J. Johnston, M. Hannigan   +5 more
doaj   +1 more source

Short-term exposure to wildfire-related PM2.5 increases mortality risks and burdens in Brazil

Nature Communications, 2022
To assess mortality risks and burdens associated with short-term exposure to wildfire-related PM2.5, the authors collect daily mortality data from 2000 to 2016 for 510 immediate regions in Brazil, the most wildfire-prone area.
Tingting Ye, Rongbin Xu, Xu Yue, Gongbo Chen, Pei Yu, Micheline S. Z. S. Coêlho, Paulo H. N. Saldiva, Michael J. Abramson, Yuming Guo, Shanshan Li   +9 more
doaj   +1 more source

LSTM-Based IoT-Enabled CO2 Steady-State Forecasting for Indoor Air Quality Monitoring

Electronics, 2022
Whether by habit or necessity, people tend to spend most of their time indoors. Built-up Carbon dioxide (CO2) can lead to a series of negative health effects such as nausea, headache, fatigue, and so on.
Yingbo Zhu, Shahriar Abdullah Al-Ahmed, M. Z. Shakir, J. Olszewska   +3 more
semanticscholar   +1 more source

Contributions of natural and anthropogenic sources to ambient ammonia in the Athabasca Oil Sands and north-western Canada [PDF]

Atmospheric Chemistry and Physics, 2018
Atmospheric ammonia (NH3) is a short-lived pollutant that plays an important role in aerosol chemistry and nitrogen deposition. Dominant NH3 emissions are from agriculture and forest fires, both of which are increasing globally.
C. H. Whaley, C. H. Whaley, P. A. Makar, M. W. Shephard, L. Zhang, J. Zhang, Q. Zheng, A. Akingunola, G. R. Wentworth, G. R. Wentworth, J. G. Murphy, S. K. Kharol, K. E. Cady-Pereira   +12 more
doaj   +1 more source

Detection of Air Pollution in Urban Areas Using Monitoring Images

, 2023
Air quality monitoring in polluted environments is of great significance to human health. Traditional methods use various pieces of meteorological equipment, which have limited applications in complex terrains and high costs.
Hengyong Yu, Hong Fu, Fan Chen, Ying Chu
core   +1 more source