On-Road Remote Sensing of Motor Vehicle Emissions: Associations between Exhaust Pollutant Levels and Vehicle Parameters for Arizona, California, Colorado, Illinois, Texas, and Utah

On-Road Remote Sensing of Motor Vehicle Emissions: Associations between Exhaust Pollutant Levels and Vehicle Parameters for Arizona, California, Colorado, Illinois, Texas, and Utah

Access: Use of this item is restricted to the UNT Community.
Date: May 2003
Creator: Dohanich, Francis Albert
Description: On-road remote sensing has the ability to operate in real-time, and under real world conditions, making it an ideal candidate for detecting gross polluters on major freeways and thoroughfares. In this study, remote sensing was employed to detect carbon monoxide (CO), hydrocarbons (HC), and nitrogen oxide (NO). On-road remote sensing data taken from measurements performed in six states, (Arizona, California, Colorado, Illinois, Texas, and Utah) were cleaned and analyzed. Data mining and exploration were first undertaken in order to search for relationships among variables such as make, year, engine type, vehicle weight, and location. Descriptive statistics were obtained for the three pollutants of interest. The data were found to have non-normal distributions. Applied transformations were ineffective, and nonparametric tests were applied. Due to the extremely large sample size of the dataset (508,617 records), nonparametric tests resulted in "p" values that demonstrated "significance." The general linear model was selected due to its ability to handle data with non-normal distributions. The general linear model was run on each pollutant with output producing descriptive statistics, profile plots, between-subjects effects, and estimated marginal means. Due to insufficient data within certain cells, results were not obtained for gross vehicle weight and engine type. The "year" ...
Contributing Partner: UNT Libraries
UNEP Year Book 2010: New Science and Developments in Our Changing Environment

UNEP Year Book 2010: New Science and Developments in Our Changing Environment

Date: 2010
Creator: United Nations Environment Programme
Description: This publication presents an overview of global and regional environmental issues and policy decisions during 2010.
Contributing Partner: UNT Libraries
A Guide to the Global Environment Facility for NGOs

A Guide to the Global Environment Facility for NGOs

Date: September 2005
Creator: Hager, Mary
Description: This guide describes the various operations and activities of the Global Environment Facility partnership.
Contributing Partner: UNT Libraries
Saving the Salton Sea: Alternatives to Reduce Harmful Pollutants

Saving the Salton Sea: Alternatives to Reduce Harmful Pollutants

Date: April 15, 2010
Creator: Tipotsch, Kira & La Point, Thomas W., 1949-
Description: This poster discusses research on the Salton Sea and alternatives to reduce harmful pollutants. The authors propose to examine first, the sources and harmful effects of the key pollutants, and second, possible alternatives to reduce the levels of these pollutants.
Contributing Partner: UNT Honors College
Rebuilding the World with Green BRICs

Rebuilding the World with Green BRICs

Date: April 15, 2010
Creator: Hubby, Desiree & Engen, Ryan
Description: This poster discusses research on rebuilding the world with green BRICs. Specifically, the international community needs to collectively explore green, energy-efficient ways of living and producing that include (1) switching from the use of fossil fuels to clean, renewable energy alternatives and more efficient systems, and, (2) closing the gap between rich and poor nations to alleviate poverty, especially with respect to energy-poverty in developing countries.
Contributing Partner: UNT Honors College