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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 79 for “"field sampling"”.
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Crossed-Field Sampling of Picosecond Optical Signals
Made available in DSpace on 2014-12-12T20:54:50Z (GMT). No. of bitstreams: 1 7821014.pdf: 3668839 bytes, checksum: 2ad7a4cf4c09292595c047c37e370d97 (MD5) Previous issue date: 1978
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Field sampling and microcolumn preconcentration techniques in inductively coupled plasma spectrometry.
… alumina microcolumns are utilised as a new field sampling tools. Samples are collected in the field and processed through the alumina microcolumns for the effective retention of desired analytes. Hence, an alumina microcolumn sampling stage to effect concentration and isolation prior to …
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Field sampling and flow injection strategies for trace analysis and element speciation.
… The microcolumn technique was transferred to the field and speciation of mercury in surface waters of the Manchester Ship Canal was undertaken and high methylmercury concentrations (0.052-0.182 ug 1 -1, as Hg) were detected. In so doing the new approach offered the preservation of the natural …
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Estimating Carbon Pool and Carbon Release due to Tropical Deforestation Using High-resolution Satellite Data
… was obtained from USGS and adjusted to the field using GPS. Historical images were corrected using image-to-image registration. Atmospheric correction was done by modified dark object subtraction method. Stratified sampling design based on the remote sensing image was applied for assessing …
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A Study of the Intermediate-Range Transport of Secondary Acidic Species
… to separate submicron atmospheric particles, (2) Field sampling and chemical analyses of submicron particles to obtain elemental and ionic concentrations, (3) Determination of a tracer for coal-fired power plants by factor analysis of the chemical data, and (4) Calibration of a hybrid receptor …
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Detection of Giardia lamblia and Cryptosporidium parvum in the eastern oyster (Crassostrea virginica) harvested from the Great Bay Estuary
… determine the applicability of this method to field studies, three sites were sampled in the Great Bay Estuarine system using a sample size of 25 oysters. Two of the selected field sampling sites were classified as approved for shellfish harvesting based on most-probable-number water analysis …
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Development and assessment of predictive spatial models for a rare Tennessee anuran: Barking treefrog (Hyla gratiosa)
… is listed as both rare and vulnerable, and more field data is needed to elucidate its distribution. Predictive modeling using the program MaxEnt provided results for models that guided field sampling to potential presence locations. From April-August 2017, 126 sites (63 historical; 63 predicted) …
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Abundance and Distribution of Early Life Stage Blue Crabs (Callinectes sapidus) in Lake Pontchartrain
… Lake Pontchartrain and quantify water movement. Field sampling along with remote sensing proved to be beneficial when assessing estuarine-wide C. sapidus post-larval dispersal processes.
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Water Quality Study of Southshore of Lake Pontchartrain
In 2004, a field sampling study was initiated along the southern shoreline area of Lake Pontchartrain in Jefferson Parish, specifically, around Bonnabel Canal (Pumping Station No.1) to identify the effect of urban stormwater discharges on Lake Pontchartrain and to simulate the plume patterns from …
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Hydrologic and water quality modeling with HSPF : utilization of data from a novel field data collection system and historical archives
… data obtained during a technically enabled field sampling campaign. These inputs are formatted for import to the HSPF routines, streamflow is simulated, and outputs are analyzed for accuracy.
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Reduction of odors associated with chlorine dioxide applications to drinking water
… water. Data were obtained through a survey and field sampling at utilities experiencing odor events. Once the cause was determined, potential water-treatment procedures were evaluated in laboratory-scale studies. Results from a survey sent to water utilities throughout the United States showed …
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Spatial and Seasonal Patterns of Above- and Belowground Vegetation Biomass and Potential Drivers in the Pascagoula River Delta, MS
… and nitrogen on vegetation productivity using a field-sampling approach and an <em>in situ</em> controlled mesocosm experiment, called a marsh organ. The West Channel of the Pascagoula River contained significantly higher belowground biomass than the East Channel, which is more anthropogenically …
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Fungi Associated with Herbaceous Plants in Coastal Northern California
… USA. The research involved a combination of field sampling surveys and data collection using a stratified random design, pathogen identification through microbiological and molecular analysis, and descriptive analysis and ordination of results. A total of two years of repeated sampling (four …
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Classification and dynamics of the forest vegetation of Hluhluwe Nature Reserve, Kwa Zulu-Natal
… classification, dynamics and conservation value. Field sampling took the form of recording DBH for all species in twenty-one 0.04 ha circular plots, walking 5-metre wide transects in mature and marginal forest to record size-classes and analysis of twenty gaps. Data were analysed by the …
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Nano Vacuum Channel Devices for Electronics and Ultrafast Nanophotonics
… in this thesis, has demonstrated a rectified, field driven current response from planar NVCs that extends to petahertz-scale frequencies. Such petahertz electronic devices enable field-resolved measurements of ultrafast phenomena and the capability to decode information stored directly on the …
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Magnitude and spatio-temporal variability of methane emissions from a eutrophic freshwater lake
… Lake located in eastern Massachusetts, US. Field sampling was done between June and November 2007, and between April and November 2008. In both years, ebullition at the lake was strongly episodic, and the amount and composition of bubbled gas varied considerably between sites. In 2008, …
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The Role of Leaf Litter and Small Wood in the Retention of Fine Particles During Storms in an Appalachian Headwater Stream
… effect of leaf exclusion on FPOM transport by field sampling and by generating computer simulations of particle transport in the stream. Sampling of suspended particles during storms showed that although litter inputs and subsequent particle generation were greatly decreased (Wallace et al. …
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Post-release establishment and supercooling point assessment of Laricobius osakensis, a predator of the hemlock woolly adelgid
… source for L. osakensis, which resulted in low field recoveries of them. In the 2015-2016 field season, there were 14 larvae recovered from the field, and the 2016-2017 field season yielded 90 larvae. A significant correlation was found between Laricobius beetles recovered and HWA density, …
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Water Quality Study and Plume Behavior Modeling for Lake Pontchartrain at the Mouth of the Tchefuncte River
… for recreational uses of the area. In 2003 a field sampling study was initiated in the north shore area of the Lake at the mouth of the Tchefuncte River. The objectives were to determine the water quality in the area and to simulate the plume patterns from the Tchefuncte River. Twenty eight …
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Effects of Wildfire Intensity on Invasives, Stand Structure and Fuel Loading in Shenandoah National Park
… (45 m), and 250 ft (75 m) from a road or trail. Field sampling was conducted between May 15, 2004 and June 30, 2004. A subsample of these plots were used to determine specific gravity and quadratic mean diameter for each size class of fuel and to determine the bulk density of the duff and litter …
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