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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Characterizing the emissions of fine particulate matter in the vicinity of a rail yard

Galvis Remolina, Boris 12 January 2015 (has links)
Aerosol emissions from diesel combustion and other activities in rail yards can affect the health of urban populations. Fine particulate (PM[subscript 2.5]) concentrations near the Inman and Tilford rail yards in Atlanta, Georgia, are the highest measured in the state. The rail yard complex is surrounded by homes, schools, businesses and other industries. The impact of the aerosol emissions from these rail yards on local concentrations of PM[subscript 2.5] was quantified. Specifically, black carbon and PM[subscript 2.5] fuel-based emission factors from the rail yards were estimated by carbon balance using high time-resolution monitoring, a BC and PM[subscript 2.5] emissions inventory was estimated and dispersion modeling was applied to assess the impact of the rail yard activities on local air quality and the cost and benefits of upgrading locomotive engines with cleaner technologies was assessed. Further, baseline information that will allow a later evaluation of the improvement of local air quality as locomotives operating in the rail yards are upgraded was generated, and a composition profile of the rail yard aerosols was developed using chemical speciation techniques. These results found that activities from locomotives in the Inman and Tilford Rail yards lead to and an average emission factor of 6.0 ± 0.5 g of PM[subscript 2.5] per gallon of fuel and are responsible for increases in annual average concentrations of approximately 1.3 µg/m³ of PM[subscript 2.5] as far as 1 km from the perimeter of the rail yard complex. Approximately 11.7 tons of BC and 26 tons of PM[subscript 2.5] per year were emitted from the rail yards in 2011. The rail yards were found to be important sources of hydrocarbon-like organic aerosols (HOA) and black carbon from fuel (BCf). Upgrading the engines at the rail yards would decrease PM[subscript 2.5] emissions by about 9 t/year, reducing PM[subscript 2.5] concentrations around 0.5±0.1 µg/m³ as far as 1 km from the perimeter of the rail yard complex and producing monetized health benefits of approximately 24 million dollars per year.
2

A study of the critical success factors for sustainable TQM : a proposed assessment model for maturity and excellence

Nasseef, Mohammed Abdullah January 2009 (has links)
Study of the critical factors for TQM implementation throughout the years, and longitudinal analysis of secondary quality winners of prestigious awards such as the Malcolm Baldrige National Quality Award (MBNQA), is important. The longitudinal analysis in this research will enable verification that there are generic critical factors (CFs) for TQM implementation and generic critical areas of measurement (CAM) that if implemented fully and successfully will deliver excellence. Also, it will enable verification that these generic CFs help to ensure sustainable performance and this could help in answering how excellent organisations sustain their performance constantly. By studying what excellent organisations measure and what they place emphasis on throughout the year, the study will document measurements that have been used to sustain excellence and will consider empirically how these have led to tangible results over a period of twenty years; the study will examine MBNQA winners from 1988 until 2008. Finally, an excellence maturity assessment tool 'assessment software' was developed as result of examining winning case studies over a long period of time, lists of critical factors of implementation (CFI) and critical areas of measurement (CAM) were extracted and used accompanied by the EFQM Excellence Model, and Zairi's two model 'Index of Excellence' and 'Ladder of Excellence'. This formed the basis of the assessment tool developed; companies through this will be able to understand their level of excellence implementation and their position compared to world class organisations.
3

A study of the critical success factors for sustainable TQM. A proposed assessment model for maturity and excellence.

Nasseef, Mohammed A. January 2009 (has links)
Study of the critical factors for TQM implementation throughout the years, and longitudinal analysis of secondary quality winners of prestigious awards such as the Malcolm Baldrige National Quality Award (MBNQA), is important. The longitudinal analysis in this research will enable verification that there are generic critical factors (CFs) for TQM implementation and generic critical areas of measurement (CAM) that if implemented fully and successfully will deliver excellence. Also, it will enable verification that these generic CFs help to ensure sustainable performance and this could help in answering how excellent organisations sustain their performance constantly. By studying what excellent organisations measure and what they place emphasis on throughout the year, the study will document measurements that have been used to sustain excellence and will consider empirically how these have led to tangible results over a period of twenty years; the study will examine MBNQA winners from 1988 until 2008. Finally, an excellence maturity assessment tool ¿assessment software¿ was developed as result of examining winning case studies over a long period of time, lists of critical factors of implementation (CFI) and critical areas of measurement (CAM) were extracted and used accompanied by the EFQM Excellence Model, and Zairi¿s two model ¿Index of Excellence¿ and ¿Ladder of Excellence¿. This formed the basis of the assessment tool developed; companies through this will be able to understand their level of excellence implementation and their position compared to world class organisations. / Government of Saudi Arabia represented by the Ministry of Higher Education

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