Results 21 to 30 of about 1,341,264 (249)

Evaluating Real Driving Emissions of Compressed Natural Gas Taxis in Chongqing, China—A Typical Mountain Cities

Atmosphere
Compressed natural gas (CNG) taxis represent the most ubiquitous and dynamically active passenger vehicles in urban settings. The pollutant emission characteristics of in-use CNG taxis driving on a typical mountain city before and after three-way ...
Wei Hu, Linfeng Duan, Min Tang, Rui Yuan, Gaiyan Lv, Pingjiang Lv, Zhenliang Li, Ling Li, Hualong Xu, Jiajia Ding, Dan Zhang   +10 more
doaj   +1 more source

Development and Evaluation of a Comprehensive Atmospheric Emission Inventory for Air Quality Modeling in the Megacity of Bogotá

Atmosphere, 2018
We built an emission inventory (EI) for the megacity of Bogotá, Colombia for 2012, which for the first time augments traditional industrial and mobile sources by including commercial sources, biogenic sources, and resuspended dust.
Jorge E. Pachón, Boris Galvis, Oscar Lombana, Luis Gabriel Carmona, Sandra Fajardo, Alexander Rincón, Sandra Meneses, Rafael Chaparro, Robert Nedbor-Gross, Barron Henderson   +9 more
doaj   +1 more source

Spatiotemporal Variations and Contributing Factors of Air Pollutant Concentrations in Malaysia during Movement Control Order due to Pandemic COVID-19

Aerosol and Air Quality Research, 2020
The restriction of daily and economic-related activities due to COVID-19 pandemic via lockdown order has been reported to improve air quality. This study evaluated temporal and spatial variations of four major air pollutant concentrations across Malaysia
Zulfa Hanan Ash’aari, Ahmad Zaharin Aris, Eliani Ezani, Nurfatin Izzati Ahmad Kamal, Norlin Jaafar, Jasrul Nizam Jahaya, Shamsuri Abdul Manan, Muhamad Firdaus Umar Saifuddin   +7 more
doaj   +1 more source

Chemical transport model simulations of organic aerosol in southern California: model evaluation and gasoline and diesel source contributions [PDF]

Atmospheric Chemistry and Physics, 2017
Gasoline- and diesel-fueled engines are ubiquitous sources of air pollution in urban environments. They emit both primary particulate matter and precursor gases that react to form secondary particulate matter in the atmosphere.
S. H. Jathar, M. Woody, H. O. T. Pye, K. R. Baker, A. L. Robinson   +4 more
doaj   +1 more source

Changes in speciated PM2.5 concentrations in Fresno, California, due to NOx reductions and variations in diurnal emission profiles by day of week

Elementa: Science of the Anthropocene, 2019
The San Joaquin Valley in California suffers from poor air quality due to a combination of local emissions and weak ventilation. Over the course of decades, there has been a concerted effort to control emissions from vehicles as well as from residential ...
Benjamin de Foy, James J. Schauer
doaj   +1 more source

Particulate matter concentrations at public schools located near major urban roads in Bogota, Colombia: a pilot study

Revista Facultad de Ingeniería Universidad de Antioquia, 2013
A pilot study, in which we conducted inhalable particulate matter (PM10) measurements in four public elementary schools in Bogotá, is presented. Three of these schools are located alongside major urban roads with different types of public transportation.
Juan Felipe Franco , Néstor Yesid Rojas, Olga Lucía Sarmiento, Luis Jorge Hernández, Elizabeth Zapata , Andrea Maldonado, Leonardo Matiz, Eduardo Behrent   +7 more
doaj   +1 more source

Autonomous Search of Radioactive Sources through Mobile Robots

Sensors, 2020
The research of robotic autonomous radioactivity detection or radioactive source search plays an important role in the monitoring and disposal of nuclear safety and biological safety.
Jianwen Huo, Manlu Liu, Konstantin A. Neusypin, Haojie Liu, Mingming Guo, Yufeng Xiao   +5 more
doaj   +1 more source

Trends in OMI NO₂ observations over the United States: effects of emission control technology and the economic recession [PDF]

Atmospheric Chemistry and Physics, 2012
Observations of tropospheric NO2 vertical column densities over the United States (US) for 2005–2011 are evaluated using the OMI Berkeley High Resolution (BEHR) retrieval algorithm.
R. C. Cohen, A. R. Russell, L. C. Valin
doaj   +1 more source

The Open University Library in your pocket [PDF]

, 2010
The Open University library is working to support mobile learners through provision of mobile access to information management skills tutorials, the library website, and the library helpdesk. In 2007, we joined hands with the Athabasca University library
Mills, Keren, Sheikh, Hassan
core  

MSPlayer: Multi-Source and multi-Path LeverAged YoutubER

, 2014
Online video streaming through mobile devices has become extremely popular nowadays. YouTube, for example, reported that the percentage of its traffic streaming to mobile devices has soared from 6% to more than 40% over the past two years.
Chen, Yung-Chih, Khalili, Ramin, Towsley, Don   +2 more
core   +1 more source