Results 21 to 30 of about 270,023 (312)

Capturing the Variability in Instantaneous Vehicle Emissions Based on Field Test Data

open access: yesAtmosphere, 2020
Emission models are important tools for traffic emission and air quality estimates. Existing instantaneous emission models employ the steady-state “engine emissions map” to estimate emissions for individual vehicles.
Zhiqiang Zhai   +4 more
doaj   +1 more source

Trends in life cycle greenhouse gas emissions of future light duty electric vehicles [PDF]

open access: yes, 2020
The majority of previous studies examining life cycle greenhouse gas (LCGHG) emissions of battery electric vehicles (BEVs) have focused on efficiency-oriented vehicle designs with limited battery capacities.
Ambrose, H   +4 more
core   +1 more source

Long-term U.S transportation electricity use considering the effect of autonomous-vehicles: Estimates & policy observations [PDF]

open access: yes, 2018
In this paper, we model three layers of transportation disruption – first electrification, then autonomy, and finally sharing and pooling – in order to project transportation electricity demand and greenhouse gas emissions in the United States to 2050 ...
Fox-Penner, Peter   +2 more
core   +2 more sources

Current vehicle emission standards will not mitigate climate change or improve air quality

open access: yesScientific Reports, 2023
The vehicle emissions testing programme was conducted by the UK Department of Transport in 2016 in response to emissions tampering exposed in the Volkswagen (VW) emissions scandal. The programme identified large emissions discrepancies between real-world
Andrew Jiaxuan Law   +2 more
doaj   +1 more source

Non-linear influences of the built environment on transportation emissions: focusing on densities [PDF]

open access: yes, 2017
Compact development is often recommended to reduce auto-dependency thereby decreasing related energy consumptions and transportation emissions. However, there could be a non-linear relationship between density and transportation emissions because of a ...
Hong, Jinhyun
core   +2 more sources

Measurement of vehicle particulate emissions. [PDF]

open access: yesEnvironmental Health Perspectives, 1975
A constant volume sampler (CVS) compatible auto exhaust particulate sampling system has been built which samples exhaust isokinetically at constant temperature. This system yields internally consistent results and is capable of frequent and convenient operation.
openaire   +2 more sources

Fortifying casein phosphopeptides and Ca in wheat reduces the As, Cd, and Pb bioavailability based on a mouse model: Calcium and phosphate transporters and gut microbiota

open access: yesSoil & Environmental Health
Reducing the oral bioavailability of metal contaminants including As, Cd, and Pb in foods can protect human health. Studies showed reduced metal bioavailability with elevated Ca and Fe intake; however, the effectiveness of enhancing food Ca and Fe ...
Sheng-Zhi Chen   +6 more
doaj   +1 more source

Evaluation of the micro-carburetor [PDF]

open access: yes, 1981
A prototype sonic, variable-venturi automotive carburetor was evaluated for its effects on vehicle performance, fuel economy, and exhaust emissions.
Hall, R. A., Mazor, S. D., Weiss, M. F.
core   +2 more sources

Development of a vehicle emission inventory with high temporal–spatial resolution based on NRT traffic data and its impact on air pollution in Beijing – Part 1: Development and evaluation of vehicle emission inventory [PDF]

open access: yesAtmospheric Chemistry and Physics, 2016
This paper presents a bottom-up methodology based on the local emission factors, complemented with the widely used emission factors of Computer Programme to Calculate Emissions from Road Transport (COPERT) model and near-real-time traffic data on road ...
B. Jing   +8 more
doaj   +1 more source

Comprehensive Analysis of the Pollutant Characteristics of Gasoline Vehicle Emissions under Different Engine, Fuel, and Test Cycles

open access: yesEnergies, 2022
Vehicle exhaust emissions have seriously affected air quality and human health, and understanding the emission characteristics of vehicle pollutants can promote emission reductions.
Zongyan Lv   +7 more
doaj   +1 more source

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