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 246 for “"Interferences"”.
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Modeling Human Interferences to Hydrologic Systems
… and modeling both indirect and direct human interferences. This thesis research is expected to advance more accurate understanding of human interferences to hydrologic systems, as well as providing new methodology to study heavily managed watersheds as coupled human-natural systems. The …
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Ecological implications of allelopathic interferences with reference to Phragmites australis
The effects of plant invasions on ecosystem structure and function are well studied but the pathways and mechanisms that underlie these effects remain poorly understood. In depth investigation of invasion mechanisms is vital to understanding why invasive plants impact only certain systems, and why …
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Interferences with measurements of CO, CO₂, and O₂ in woodstove flue gases
Concentrations of CO, CO₂, and O₂ in woodstove flue gases are some of the measured inputs required by algorithms used to calculate woodstove efficiency by the stack loss method. Since these algorithms have been shown to be very sensitive to small errors in these input values, it was necessary to …
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Reducing interferences in glow discharge spectroscopies using transient operation and collision -induced dissociation
… are often dependent on the presence of interferences. Interferences are defined as a measured signal response to a species at the spectral position of interest for the analyte that is not caused by the analyte. Because the presence of spectral interferences can deleteriously affect the …
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Using multivariate statistical procedures to identify ignitable liquid residues in the presence of interferences
… liquid can be affected by factors such as matrix interferences, evaporation of the ignitable liquid, and thermal degradation. This research aims to develop an objective method for associating ILRs to the corresponding ignitable liquid standard using multivariate statistical procedures. The …
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Reduction of polyatomic ion interferences in inductively coupled plasma mass spectrometry with cryogenic desolvation
… the presence of Ca and Mo, which generally cause interferences;Samples dissolved in organic solvents are particularly troublesome for ICP-MS; the plasma becomes unstable and carbon deposits on the interface. Cryogenic desolvation was applied with methanol, ethanol, acetone, and acetonitrile. The …
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Analysis of the Dynamic Interferences Between the Stator and Rotor of a Refrigeration Compressor Motor
This thesis involves the development and study of a finite element model of a hermetic, single-vane compressor and a single-phase alternating current induction motor assembled in a common housing. The manufacturer of this unit is experiencing a high scrap rate due to interference during operation …
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An investigation into Manganese(2+) interferences and retrospective dose assessment of shelled species using EPR spectroscopy
High intensity Mn²⁺ peaks in calcified tissues of shells are known to impact the lower dose detection limit in retrospective electron paramagnetic resonance (EPR) studies. This thesis investigates the factors causing Mn²⁺ accumulation in shells including crystalline structure and animal habitat. …
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Influence of evaporation and matrix interferences on the association and discrimination of ignitable liquids using chemometric procedures
Thesis (M.S.)--Michigan State University. Department of Criminal Justice, 2010
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Interferences between non-proliferation and science: ‘exporting’ dual-use know-how and technology in conformity with security imperatives
Chapter 1 introduces the reasoning underpinning the study: what are the main drivers and the overall objective for undertaking this intellectual endeavour. It also sets the main questions to be answered and a hypothesis to be verified. Chapter 2 sets the scene where the study evolves. What is the …
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Test burning of carpet and foam and potential interferences in identifying petrol in arson investigation by gas chromatography/ mass spectrometry
Work described in this thesis contains the results of the study on subjecting carpet and foam to different burning tests and the evaluation, by gas chromatography/ mass spectrometry (GC/MS), of the burnt residues for the purpose of identifying compounds which may potentially interfere with the …
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Biofilm-related Materials as Total N-nitrosamine (TONO) Precursors and Hydroxylamine-based Interferences in TONO and N-nitrosodimethylamine (NDMA) Measurements
… mM monochloramine. However, several analytical interferences were discovered, associated with excess hydroxylamine in the samples, which obscured results from the TONO assay, GC-FID (for NDMA), and ion chromatography (for nitrite). In the aqueous phase with dimethylamine present, hydroxylamine …
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Immediate Effect of Complete Denture Occlusal Errors on Masticatory Muscle EMG Activity in Denture Wearers: A Pilot Study
… the effect of unilateral and bilateral occlusal interferences on the masticatory muscle activity in edentulous patients, and how patients respond to occlusal interferences both physiologically and psychologically over a brief period of time.</p> <p>In ten subjects rigid bilateral intercuspal …
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Fundamental studies of mixed gas plasmas in ICP-MS
… analysis. It suffers however, from a range of interferences both spectral and non - spectral which limit the range of analytes and substrates which may be successfully analyzed. This study has investigated the use of mixed gas plasmas as a means of reducing or removing these interference …
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REACTIVE GASES IN ELECTROTHERMAL ATOMISATION ATOMIC ABSORPTION SPECTROMETRY
… normal charring into an ashing step. A number of interferences eg. magnesium chloride on lead determinations and non-specific absorbance interferences, decreased when air was introduced. Hydrocarbon gases (< 5% v/v) introduced during charring improved sensitivity (up to 89%) for certain refractory …
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Signal direction-of-arrival and amplitude estimation for multiple-row bathymetric sidescan sonars
… the multipath reflections and other directional interferences are the key limiting factors for a better performance. This thesis proposes a new scheme to deal with the interferences using a multiple-row bathymetric sidescan sonar. Instead of smoothing the measurements over some time or angle …
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Effect of Centric Interference on Canine Tooth Wear
… a Panadent® Articulator and evaluated for dental interferences and CO/MIP variance using the incisal pin locator. The canines were evaluated for volumetric CTW from T2 to T4 using Geomagic Control (3D Systems, South Carolina 2014). Intraclass correlation test was used to evaluate repeatability. A …
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Interference characterization and suppression for multiuser direct-sequence spread-spectrum system
… the presence of multiple-access (user-to-user) interferences (MAI) and multipath interferences. The uniqueness of our study is that in bit-error-rate evaluation, instead of approximating the interference as Gaussian noise (which has been done in most of the previous studies), we incorporate both …
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Automatic generation of interference-free geometric models of spatial mechanisms
… is discussed. A method for determining interferences based on vector loop equations was developed for this work. Other approaches for interference detection include parametric space and a method using parallel coordinates. 2000 line segments were randomly generated to test the three …
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