Results 21 to 30 of about 123,269 (263)

Estimation of air change rate by CO2 sensor network in workplace with COVID-19 outbreak.

Environmental and occupational health practice, 2023
This study aimed to measure the air change per hour (ACH) in a workplace that spanned 880 m2 and had a ceiling height of 3 m. This workplace experienced clusters of coronavirus disease (COVID-19) cases, and the study measured ACH before and after remediation.
Yokogawa, Shinji, Ishigaki, Yo, Kitamura, Hiroko, Saito, Akira, Kawauchi, Yuto, Hiraide, Taisei   +5 more
openaire   +3 more sources

Mathematical simulations for studying the effectiveness of HTO removal mechanism from spent fuel storage bay and estimating the environmental releases

Radiation Protection and Environment, 2019
The diffusion of tritiated water (HTO) vapor from the spent fuel storage bay to the spent fuel storage building (SFSB) may lead to internal exposure to occupational workers.
Lokesh Kumar, Rajendrakumar B Oza, Ranjit Sharma, Rayroath K Gopalakrishnan   +3 more
doaj   +1 more source

Estimating future air-quality due to climate change: the Athens case study [PDF]

Advances in Science and Research, 2011
Abstract. The aim of this study is to investigate the development of an empirical-statistical model in order to examine the potential impact of increasing future temperatures on ozone exceedance days in the Greater Athens Area. It is based on the concept that temperature is a capable predictor for the ozone concentrations and that in a future climate ...
Varotsos, K. V., Giannakopoulos, C., Tombrou, M.   +2 more
openaire   +5 more sources

Changes in a Bottom-Up Vehicular Emissions Inventory and Its Impact on Air Pollution During COVID-19 Lockdown in São Paulo, Brazil

Frontiers in Sustainable Cities, 2022
Due to coronavirus disease 2019 (COVID-19), many cities implemented strict lockdown to stop the spread of this new disease. Consequently, it was reported lower levels of air pollution due to less human activity outdoors. The changes were registered using
Sergio Ibarra-Espinosa, Sergio Ibarra-Espinosa, Sergio Ibarra-Espinosa, Amanda Rehbein, Edmilson Dias de Freitas, Leila Martins, Maria de Fatima Andrade, Eduardo Landulfo   +7 more
doaj   +1 more source

Estimating the Air Change Rates in Dwellings Using a Heat Balance Approach

Energy Procedia, 2015
AbstractInfiltration and ventilation rates in domestic buildings vary with construction type, weather conditions and the operation of openings in the fabric. Generating good estimates of ventilation is important for modelling, simulation and performance assessment as it has a significant impact on energy consumption.
Cosar-Jorda, Paula, Buswell, Richard A.
openaire   +1 more source

Estimating lockdown-induced European NO ₂ changes using satellite and surface observations and air quality models [PDF]

Atmospheric Chemistry and Physics, 2021
Abstract. This study provides a comprehensive assessment of NO2 changes across the main European urban areas induced by COVID-19 lockdowns using satellite retrievals from the Tropospheric Monitoring Instrument (TROPOMI) onboard the Sentinel-5p satellite, surface site measurements, and simulations from the Copernicus Atmosphere Monitoring Service (CAMS)
J. Barré, H. Petetin, A. Colette, M. Guevara, V.-H. Peuch, L. Rouil, R. Engelen, A. Inness, J. Flemming, C. Pérez García-Pando, C. Pérez García-Pando, D. Bowdalo, F. Meleux, C. Geels, J. H. Christensen, M. Gauss, A. Benedictow, S. Tsyro, E. Friese, J. Struzewska, J. W. Kaminski, J. W. Kaminski, J. Douros, R. Timmermans, L. Robertson, M. Adani, O. Jorba, M. Joly, R. Kouznetsov   +28 more
openaire   +10 more sources

Comfort IAQ – a new tool to simulate the indoor particulate matter pollution in relation to the chosen supply air filter quality [PDF]

E3S Web of Conferences, 2019
Many factors are rather well known for their ability to create a good indoor air climate, but when it comes to airborne particles, there is no great deal of documentation to consult and set requirements.
Zimmer Tobias
doaj   +1 more source

Adaptive Fuzzy Sliding Mode Observer for Cylinder Mass Flow Estimation in SI Engines

IEEE Access, 2018
In this paper, a novel algorithm for the cylinder mass flow estimation in four-stroke spark ignition (SI) gasoline engines is developed to improve the estimation precision under transient conditions.
Changhui Wang, Mei Liang, Chun-Na Li
doaj   +1 more source

Influenza incidence and air pollution: Findings from a four-year surveillance study of prefecture-level cities in China

Frontiers in Public Health, 2022
BackgroundInfluenza is a serious public health problem, and its prevalence and spread show significant spatiotemporal characteristics. Previous studies have found that air pollutants are linked to an increased risk of influenza. However, the mechanism of
Yu Zhang, Shijun Wang, Shijun Wang, Zhangxian Feng, Zhangxian Feng, Yang Song, Yang Song   +6 more
doaj   +1 more source

An optimal transformation method for inferring ocean tracer sources and sinks [PDF]

Geoscientific Model Development
The geography of changes in the fluxes of heat, carbon, freshwater and other tracers at the sea surface is highly uncertain and is critical to our understanding of climate change and its impacts.
J. D. Zika, J. D. Zika, J. D. Zika, T. Sohail, T. Sohail   +4 more
doaj   +1 more source