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 20 of 34 for “"Mass Balance Model"”.
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Observer effects on pelagic fleet operations and Bayesian-based explorations of the mass balance model ECOPATH
… of constraints associated with the ECOPATH mass-balance equations to improve knowledge on estimates of parameters in the southern Benguela ecosystem. Sardine and anchovy are the most valued and carefully managed species of small pelagic fish in South Africa. The problem of dumping in this …
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Development and application of a spatially-explicit nitrogen mass-balance model for the Wood River Valley Watershed, Idaho
Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2003.
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The response of Hagafellsjökull Vestari glacier, Iceland, to future climate scenarios computed with a dynamic glacier flowline model coupled to a degree-day mass balance model
A dynamic glacier flowline model is coupled to a degree-day mass balance model with the purpose of modelling the response of Hagafellsjökull vestari glacier to future climate change scenarios. The degree-day mass balance model is calibrated using mass balance measurements for the period 1997-2007. …
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Indoor Air Monitoring of Ethanol and Benzene in a Pilot Winery Using Active Sampling
… rate of the winery workroom. A single-space mass-balance model was used to estimate the air exchange rate for the entire workroom. The calculated air exchange rates were correlated with wind speeds and wind direction to create a linear model estimating air exchange rates based on wind speed. …
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Numerical modelling of the dynamics response of glacier to changing climates
Simulations with General Circulation Models have indicated that global warming will be enhanced at high latitudes. Wetter conditions in these regions are quite plausible with global warming due to warmer sea surface temperatures, melting of sea ice and a greater moisture holding capacity of the …
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Carbon nanotube synthesis and detection : limiting the environmental impact of novel technologies
… at pg g-1 sediment levels using a dynamic mass balance model). In addition to the CNTs themselves, potential impacts of CNT production were assessed by monitoring emissions from a representative synthesis. An ethene-fed chemical vapor deposition process generated several compounds of …
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Carbon nanotube synthesis and detection : limiting the environmental impact of novel technologies
… present at pg g' sediment levels using a dynamic mass balance model). In addition to the CNTs themselves, potential impacts of CNT production were assessed by monitoring emissions from a representative synthesis. An ethene-fed chemical vapor deposition process generated several compounds of …
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Climatic factors influencing Last Glacial Maximum and modern glacial conditions in the tropical and subtropical Andes
… known. This study uses a full surface energy and mass balance model, driven using general circulation model output, to better understand the potential for past glaciation in the region and to identify the climatic forcings that may drive glaciation in the tropical and subtropical Andes. Model …
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Pervious Concrete: A Hydrologic Analysis For Stormwater Management Credit
… an attempt to provide an estimate of credit, a mass balance model was created to be used for simulation of the hydrologic and hydraulic function of pervious concrete sections. The purpose of the model is to predict runoff and recharge volumes for different rainfall conditions and hydraulic …
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Two-stage reverse osmosis : optimal element configuration and flux distribution, energy savings
… and operation of a two-stage RO system with a mass-balance model and establish a lower bound for the energy savings achieved by the optimized two-stage system compared to a single-stage system. A two-stage RO system may consume more or less energy than a single-stage RO system of the same size …
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Incorporating Agroforestry Into Water Quality Trading: Evaluating Economic-Environmental Tradeoffs
… a flexible, accessible, and modular bioeconomic modeling system as a proof-of-concept to evaluate economic-environmental tradeoffs farmers face in an effort to support program participation and achieve environmental goals. We couple a biophysical nitrogen mass-balance model with an agricultural …
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Atmospheric chemistry and aerosol associated with the coastal urban environment
… oxygenated OA (MO-OOA) - represent SOA, a mass balance model was used to estimate the SOA formation rate. For MO-OOA, the largest formation rates aligned with intense photo-oxidation processes. For LO-OOA, the most significant formation rates occurred at night, likely associated with …
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Modeling the impacts of pulsed riverine inflows on hydrodynamics and water quality in the Barataria Bay estuary
… sites. My dissertation research concerns modeling the effects of the observed and hypothetical freshwater diversion discharges on the hydrodynamics, salinity and water quality in the Barataria estuary, a deltaic estuary in south Louisiana. This estuary receives freshwater and nutrient …
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Origin of the Lunar Ultramafic Glasses Constrained by Experiments and Models
… cumulate mantle overturn. Using a petrogenetic mass balance model, we suggest source components which could have been involved in the production of these hybridized source regions. We also calculate density as a function of pressure for several high-Ti glasses as well as the A14VLT glass and …
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Seasonal and interannual variability in the hydrology and geochemistry of an outlet glacier of the Greenland Ice Sheet
… proglacial river were used as a component of a mass balance model. I demonstrated that Jdis, the 222Rn fraction derived from the distributed system, was >90% of the 222Rn flux on average, and therefore, 222Rn can be used as a passive flow tracer of distributed system drainage. Supraglacial …
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Linker-based Lecithin Microemulsions as Transdermal Drug Delivery Systems
… been motivated by their large surface area for mass transfer, their high solubilization capacity of hydrophobic actives, and their ability to improve skin penetration. Lecithins (mixtures of phospholipids similar to those find in the skin) have been proposed as ideal surfactants in …
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Effect of peat solidification on macronutrients in soils associated with palm oil plantation in peat area
… fly ash and bottom ash. Lab scale physical model was set up in different conditions with combination of peat, rainwater, solidified peat and fertilizer to simulate the actual condition on site with different environmental factors. Physico-chemical parameters were tested to characterized the …
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Emissions of 2,2,4-trimethyl-1,3-pentanediol monoisobutyrate from latex paint
… For similar times after paint application, the mass recoveries for TMPD-MIB in air for porous materials, such as gypsum board and concrete, were significantly lower than aluminum specimens. Recovery of TMPD-MIB in air for HPVC paint was generally greater than that for LPVC paint, likely due to …
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Atmospheric Mercury Species In Northern Mississippi: Concentrations, Sources, Temporal Patterns, And Soil-Air Exchange
… of photochemical oxidation. Atmospheric modeling revealed that higher levels of plume events for airborne hg often occur with air masses from the northern USA. Gaseous mercury exchange between terrestrial surfaces and the atmosphere was also investigated. Mercury fluxes over four …
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NUTRIENT RETENTION BY RIPARIAN FORESTED BUFFERS IN WESTERN MARYLAND: DO THEY WORK AND ARE THEY WORTH IT?
… riparian zones. We used a steady-state reach mass balance model to estimate lateral groundwater inputs and tested several nutrient models to describe the nutrients in groundwater discharge. We then aimed to understand if incentives given through CREP to landowners were adequate by performing a …
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