Results 111 to 120 of about 1,100,520 (348)

Monitoring Air Pollution Variability during Disasters

, 2021
National environmental regulations lack short-term standards for variability in fine particulate matter (PM2.5); they depend solely on concentration-based standards.
Earthea Nance
core   +1 more source

A Simplified Laminar Flow Model for the Pultrusion of Glass Fiber/Polyethylene Terephthalate Commingled Yarns

Advanced Engineering Materials, EarlyView.
A simplified thermoplastic pultrusion model is developed to predict thermal fields in glass fiber/polyethylene terephthalate (GF/PET) composites with reduced computational cost. By combining effective material homogenization, validation against literature data, and Gaussian‐process‐based optimization, the study reveals how heating limits, pulling speed,
Elder Soares, Nadège Bouchonneau, Christian Jochum, Donald Radford   +3 more
wiley   +1 more source

Karl Popper and the Mechanisms of Hydrogen Embrittlement

Advanced Engineering Materials, EarlyView.
Representation of the beginning of loss of ductility rather than embrittlement. Small concentrations of hydrogen in a diffusible form within iron are well‐established to harm the mechanical integrity of steels. There are theories that attempt to explain the pernicious role of hydrogen.
H. K. D. H. Bhadeshia
wiley   +1 more source

Spatial-temporal characteristics and meteorological drivers of ground-level ozone pollution in a Valley Basin City: a 5-year monitoring study in Heyuan, South China

Asian Journal of Atmospheric Environment
Over the past decade, with the implementation of a series of prevention and control measures, the concentration of PM2.5 at the surface in China has rapidly decreased. However, the issue of environmental ozone in the Guangdong-Hong Kong-Macao Greater Bay
Chu Wu, Jin Shen, Tingyuan Li, Liangxiong Luo, Xixi Cai   +4 more
doaj   +1 more source

Evidential Value of Defra Air Quality Compliance Monitoring

, 2015
The Evidential value of Defra air quality compliance monitoring report, prepared by the Air Quality Expert Group (AQEG) for Defra and the Devolved Administrations looks at the range of activities that Defra's air quality monitoring networks support ...
Air Quality Expert Group
core  

High‐Temperature Nanoindentation of Metals: Assessing Thermal Drift, Frame Compliance, and Chemical Composition Effects on the Reported Mechanical Properties

Advanced Engineering Materials, EarlyView.
Do not let thermal drift and instrument artifacts deceive high‐temperature nanoindentation results. We compare classical Oliver–Pharr and automatic image recognition analyses across steels and a Ni alloy to quantify these effects. Accounting for artifacts reveals systematic softening with temperature, while Cr and Ni additions boost resistance ...
Velislava Yonkova, Steffen Brinckmann, Ruth Schwaiger   +2 more
wiley   +1 more source

Snow‐Covered Insights From Above and Below: High‐Frequency Measurement of Nitrogen Dioxide From Space and Ground

Geophysical Research Letters
The Tropospheric Emissions: Monitoring of Pollution (TEMPO) satellite provides hourly air quality measurements over North America. This study evaluates TEMPO NO2 observations over snow‐covered surfaces, highlighting its ability to capture sharp spatial ...
D. Griffin, X. Zhao, C. McLinden, N. Yazdani, C. R. Nowlan, G. González Abad, V. Fioletov, Elisabeth Galarneau, Cris Mihele, Sumi Wren, Yushan Su, Lukas Fehr, Adam Bourassa   +12 more
doaj   +1 more source

Review of Sunset OC/EC Instrument Measurements During the EPA’s Sunset Carbon Evaluation Project

Atmosphere, 2019
To evaluate the feasibility of the Sunset semicontinuous organic and elemental carbon (OC/EC) monitor, the U.S. Environmental Protection Agency (EPA) sponsored the deployment of this monitor at Chemical Speciation Network (CSN) sites with OC and EC ...
Steven Brown, Hilary Minor, Theresa O’Brien, Yousaf Hameed, Brandon Feenstra, Dustin Kuebler, Will Wetherell, Robert Day, Richard Tun, Elizabeth Landis, Joann Rice   +10 more
doaj   +1 more source

Monitoring air quality, objectives and design

Chemical Industry and Chemical Engineering Quarterly, 2008
Today's environmental information systems combine the latest sensor and monitor technologies with data transfer; data base developments, quality assurance, statistical and numerical models and advanced computer platforms for processing, distribution and presenting data and model results.
openaire   +2 more sources

Low-Cost Outdoor Air Quality Monitoring and Sensor Calibration

ACM Trans. Sens. Networks, 2019
The significance of air pollution and the problems associated with it are fueling deployments of air quality monitoring stations worldwide. The most common approach for air quality monitoring is to rely on environmental monitoring stations, which ...
Francesco Concas, Julien Mineraud, E. Lagerspetz, Samu Varjonen, Xiaoli Liu, K. Puolamäki, Petteri Nurmi, Sasu Tarkoma   +7 more
semanticscholar   +1 more source