Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 7 of 7 for “"Ambient measurements"”.
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Ambient measurements of chemical and physical properties of organic aerosols: Insights into formation, growth, and heterogeneous chemistry
… of organic aerosol through observations of ambient size distributions is addressed. Chapter IV presents a new pathway for the formation of nitrous acid (HONO) in the urban atmosphere.</p><p>In Chapter II, the size-resolved chemical composition of sub-micron aerosol was measured at a suburban …
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Aerosol formation from oil and gas development in the Eagle Ford Shale in two different seasons
… (EFS), a region in southeast Texas, through ambient measurements during two different seasons. Instrumentation was deployed to Karnes City, TX, located in the EFS, in the spring and fall of 2023. Instrumentation included ACSM, SEMS, and monitors for O₃, NO [subscript x] and NO₂ to measure …
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Investigating Real-Time Sonar Performance Predictions Using Beowulf Clustering
… hardware and software. A sonar system measures ambient noise in real-time. Based on the active sonar range scale, new ambient measurements can be available every 1 to 24 seconds. Traditional sonar performance prediction techniques operated serially and often took approximately 120 seconds of …
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Constructing a Miniaturized Chemiluminescence Ozone Monitor for Drone-Based Measurements in Volcanic Plumes: A Way to Resolve the Volcanic Ozone Enigma
… abundant in volcanic plumes. However, field measurements with former CL O3 monitors are challenging, as they are heavy and bulky. Here we report on a lightweight version of the instrument (1.5 kg, shoebox size), which can be mounted onto a drone. In particular, the design, construction, and …
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Using novel portable air quality monitors to improve personal exposure and dose estimations for health studies
… of air pollution and human health. The PAM measurements showed excellent agreement with standard instrumentation in indoor, outdoor, and commuting environments. Field deployments involving hundreds of participants revealed the substantial exposure misclassification introduced when using …
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Time Dependent Uptake of Volatile Organic Compounds on Silica and the Observation and Quantification of Ambient Sesquiterpenes in Virginia
… relative to more abundant terpenoid species. Ambient measurements of sesquiterpenes through the Semi-Volatile Thermal desorption Aerosol Gas chromatography (SV-TAG) instrument presented total sesquiterpene concentrations that ranged from 0.8 to 2 ppt with no isomer dominating. Sesquiterpene …
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Monitoring of atmospheric polycyclic aromatic hydrocarbons through optimization of analytical techniques
… of environmental pollutants in the context of ambient air, indoors, as well as in working environments. Sampling, extraction, sample clean up and analysis constitute the principal stages required for the determination of airborne PAHs. Most conventional methods utilize high volume samplers and …