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 96 for “"correction factors"”.
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Correction factors in quantitative microscopic analysis of mineral mixtures
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mining Engineering, 1939.
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Pulse Train Analysis Applied to the Re-Evaluation of Deadtime Correction Factors for Correlated Neutron Counting
… in accuracy by uncertainty in the deadtime correction. A pulse train analysis method has been developed and applied to the re-evaluation of deadtime correction factors for correlated neutron counting. The Monte-Carlo transport code MCNPXTM was used to generate a time-stamped list of neutron …
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Investigation of Indoor Propagation Algorithms for Localization Purposes: Simulation and Measurements of Indoor Propagation Algorithms for Localization Applications using Wall Correction Factors, Local Mean Power Estimation and Ray Tracing Validations
… loss model (EWLM). The modified model with wall correction factors is compared to other indoor path loss prediction models using simulation data (for 2.4, 5, 28, 60 and 73.5 GHz) and real-time measurements (for 2.4 and 5 GHz). Different operating frequencies and antenna polarizations are …
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Evaluation Of Pavement Surface Friction Seasonal Variations
… The resulting ratios were considered friction correction factors to bring the friction measurements to the lowest value. After studying the friction variation throughout the year, sinusoidal models were fitted to the data to predict monthly correction factors for measurements at different …
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Examination of secondary electrons generated by encapsulated gamma sources to improve contact dosimetry estimates
… - 40 contains contact dose rate conversion factors for encapsulated gamma sources, along with recommended secondary electron correction factors. However, the secondary electron correction factors were based on experiments done in the 1930s and 1940s with encapsulated radium sources, and the …
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Analytical Evaluation of the Accuracy of Roller Rig Data for Studying Creepage in Rail Vehicles
… and Johnson and Vermeulen are used to establish correction factors, scaling factors, and transformation factors that allow us to relate the results from a scaled rig to those of a tangent track. �Correction factors, which are defined as the ratios of a given quantity (such as creep coefficient) …
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Real world heavy-duty vehicle emissions modeling
… Business District (CBD) schedule.;Several speed correction factors were developed for the three vehicles considered in this analysis. These correction factors can be used to account the variations in the vehicle condition, class and variations in the testing environment. (Abstract shortened by …
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Detailed thermal analysis of a thin-shell, spherical radiometer in Earth orbit
… non-dimensionaliz;ing the energy balance. Three correction factors are developed to describe the behavior of tl;le three components of radiant flux incident to the detector. The correction factors are developed to equal unity for a perfectly diffuse gray radiation and surfaces. The realistic …
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Characterization of Oslds For Use In Small Field Photon Beam Dosimetry
… OSLDs were characterized accounting for various correction factors associated with OSLD dose calculations. The uncertainties for each correction factor were also investigated. It was determined that the linearity, depletion, fading, and energy correction factors were identical to the RPC …
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Development and Implementation of A Remote Audit to ol For High Dose Rate (Hdr) 192Ir Brachytherapy Using Optically Stimulated Luminescence Dosimetry
… with an <sup>192</sup>Ir HDR source to determine correction factors for linearity with dose, dose rate, and the combined effect of irradiation energy and phantom construction. The uncertainties introduced by source positioning in the phantom and timer resolution limitations were also investigated. …
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3D Scintillator Detector Quenching Characterization For Scanning Proton Beams
… for dose verification, ionization quenching correction factors are needed.</p> <p>Previous studies have shown the feasibility of using multiple cameras to image volumetric scintillators for obtaining real-time measurements, and 3D information. Furthermore, ionization quenching correction …
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Investigation of sub-cell homogenization for PHWR lattice cells using superhomogenization factors
… with Superhomogenization (SPH) [Hebert, 2009] factors are also utilised in an attempt to improve accuracy. The effect of using different homogenization models (full cell, partial cell, partial-cell with SPH-corrected cross sections) is tested on a two-dimensional partial-core model consisting …
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Applications of fish scale analysis to understand growth dynamics of fish populations
… highlights the potential errors associated with correction factors (c) because of poor sampling and provides a validation of (c) values. In addition, classical fisheries assumptions about the relationship between scale radius and fish body length were tested. As a result, variability or error of …
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Flow resistance corrections for physical models using unit flowrates
… by comparing results from the two models. A correction method was proposed for improving estimates of Manning's n derived from scaled unit flowrate models. Correction factors were identified as a function of two dimensionless parameters, relative prototype channel width (defined as the ratio …
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Understanding The Influence of Photon Energy On 6Mv Non Reference Dosimetry and Ct Dosimetry Using Tld and Osld
… OSLD using Burlin Cavity Theory. Energy response correction factors were determined for a range of conditions and compared to measured correction factors with good agreement.</p> <p>When using OSLD for dose measurement in a diagnostic imaging environment, photon energy spectra are often referenced …
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Adjusting retrospective noise exposure assessment for use of hearing protection devices
… for each of 13,147 lumber mill workers. Correction factors specific to each type and class of HPD were determined based on research and standards. HPD-relevant correction factors were created using 1) deterministic methods and self-reported HPD use after filling gaps in the exposure …
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Synchronized Phasor Measurement Units Applications in Three-phase Power System
… the line parameter as well as the ratio correction factors of all the other instrument transformers can be solved automatically. Simulation results showed the errors between calculated line parameters and the real line parameter, the errors between calibrated ratio correction factors and …
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Thick target pixe analysis
… by charged particles was investigated and matrix correction factors (MCF) were calculated for a wide variety of materials including values for all pure non-gaseous elements or their compounds for the Kα and Lα X-ray lines. These factors were calculated for 1, 2, 3 and 4 MeV proton bombarding …
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