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.
Results
Showing 1 to 20 of 71 for “"field methods"”.
-
Field methods for rapidly characterizing contaminant mobility in paint waste during bridge rehabilitation
Currently, the New York State Department of Transportation (NYSDOT) uses a conservative approach of classifying all paint waste as hazardous from bridges undergoing rehabilitation which were constructed before 1989. This practice stems from the fact that there is no approved reliable, fast, and …
-
Percolation behavior of diffusionally evolved two-phase systems simulated using phase field methods
Percolation is an important phenomenon that dramatically affects the properties of many multi-phase materials. As such, significant prior work has been done to investigate the percolation threshold and critical scaling exponents of randomly assembled composites. However many materials are …
-
Performance bounds on matched-field methods for source localization and estimation of ocean environmental parameters
Matched-field methods concern estimation of source location and/or ocean environmental parameters by exploiting full wave modeling of acoustic waveguide propagation. Typical estimation performance demonstrates two fundamental limitations. First, sidelobe ambiguities dominate the estimation at low …
-
Performance bounds on matched-field methods for source localization and estimation of ocean environmental parameters
Matched-field methods concern estimation of source location and/or ocean environmental parameters by exploiting full wave modeling of acoustic waveguide propagation. Typical estimation performance demonstrates two fundamental limitations. first, sidelobe ambiguities dominate the estimation at low …
-
From Hartree Product to Kohn-Sham and Beyond: Exploring Self-Interaction in Self-Consistent Field Methods
… that KS-DFT requires solving the self-consistent field (SCF) equations, we first present a robust and economical SCF solver - the "Quasi-Newton Unitary Optimization with Trust region"(QUOTR) solver.[Slattery, et. al. textit{Phys. Chem. Chem. Phys.}, textbf{2024}, 26, 6557-6573] To be robust, the …
-
Land Condition Trend Analysis Plot Inventory Field Methods: a Natural Resource Inventory and Forest Community Analysis Camp Clark, Nevada, Missouri
Land condition trend analysis studies were initiated at Camp Clark in the spring of 1993. Woody species of plants were mapped for 12 of 20 transects sampled. A forest community polar ordination was performed to determine community relationships. Seven plant communities were identified within the …
-
Survey of free-field methods to measure the normal specific acoustic impedance of ground surfaces in situ at low frequencies
Several techniques for measuring the normal specific acoustic impedance of the ground in situ and at low frequencies are examined. These techniques include the use of a spherical wave model, plane wave model, boundary conditions method, and the ANSI S1.18-2010 standard. Experiments are performed …
-
Development and application of field methods for determination of the extent of acid mine drainage contamination and geochemical characteristics of stream sediment recovery
… of Black Hawk, Colorado. I modified an existing field method to monitor benthic invertebrate populations in-situ, to examine the flux of metals on stream sediment in both deposition and recovery scenarios. Also using my developed methods, I was able to examine the effects of scouring (physical …
-
INFLUENCE OF ADSORPTION AND OXYGEN LIMITED BIODEGRADATION ON THE TRANSPORT AND FATE OF A CREOSOTE PLUME: FIELD METHODS AND SIMULATION TECHNIQUES (HYDROCARBON, GROUNDWATER, MODELING, TRACER TEST)
Field monitoring at the United Creosoting Company (UCC) site in Conroe, TX has shown that the shallow aquifer has become contaminated by leakage from two unlined ponds. A plume of hydrocarbon contaminated ground water is present and is contained within a large plume of elevated chloride …
-
A comparison of field methods of measurement of the water table drawdown characteristics between lateral tile drains in Brookston clay loam soil and an evaluation of an empirical formula for placing lateral drains
Thesis (M.S.)--Michigan State College of Agriculture and Applied Science. Dept. of Agricultural Engineering, 1953
-
Nonholonomic Feedback Control Among Moving Obstacles
… control based on sliding modes and potential field methods.</p>
-
Between horses: An ethnographic study of communication and organizational culture at a harness racetrack
"Through qualitative field methods this case study explores the backstretch community of a harness racetrack to discover how organizational culture is constituted through communication. The study seeks to refine and extend the notion of ""organizational communication as cultural performance"" …
-
Transformational leadership in the small Christian college
… leadership has relied primarily on quantitative methods which solicit the perceptions of subjects as they imagined an ""ideal"" leader. This study, however, represents an effort to advance our understanding of transformational leadership by exploring, through more qualitative field methods, the …
-
Characterizing Habitat and Densities of the Mojave Desert Tortoise (Gopherus agassizii) at Multiple Spatial Scales
… data are collected at these small scales through field methods such as the Assessment Inventory and Monitoring (AIM) protocol but do not have the ability to capture the heterogeneity across the landscape; thus, UAV derived imagery has the potential to bridge the gap between satellite derived …
-
Participatory and non-participatory modes of nutrition communication in a developing country : a case study of Nepal
… in the context of a developing country. Field surveys, focus group discussions and interviews with various key persons involved in nutrition development, at the national and village level in Nepal, were the main field methods used in this study. Quantitative and qualitative analyses were …
-
Optical modeling of organic electronic devices
… optical models that extend beyond classical far field methods. In this thesis we propose an extended near field calculation method using dyadic Green's functions and demonstrate the applications of both our extended model and traditional far field models for different types of devices such as …
-
Use and performance of BioSand filters in Posoltega, Nicaragua
… efficiency and the rate of sustained use. Field methods included microbial and turbidity water quality testing and interviews with filter users regarding the operation, maintenance and perceptions towards the filters. Of the 234 BioSand Filters installed in 1999 and 2004, only 24 were found …
-
Estuarine Dynamics as a Function of Barrier Island Transgression and Wetland Loss: Understanding the Transport and Exchange Processes
… in a transgressive barrier island setting. The field methods and numerical modeling in this study show that as barrier islands are converted to inner shoals, tidal exchange increases between the estuary and coastal ocean. If marshes are unable to accrete at a pace comparable to SLR, wetlands …
-
Thermodynamically consistent modelling and computational methods for multiphase flows
… the study of two-phase flows by using the phase-field methods. The key point for this work is the thermodynamic con- sistency. We begin by introducing an extension of the Model H to study the two-phase flows with thermocapilliary effects, where we assume that the coefficient of the surface …
-
3D Geologic Mapping and Characterization Using Digital Outcrop Models Generated from Uninhabited Aerial Vehicles and Structure-from-Motion Photogrammetry
… observations across various scales. Conventional field mapping techniques have remained largely unchanged for the past two centuries and are commonly limited in their ability to quantitatively constrain measurements, extend observations laterally, and document features at multiple scales. …
Page 1 of 4