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 9 of 9 for “"single-scatter"”.
-
A Curvature-Corrected Rough Surface Scattering Theory Through The Single-Scatter Subtraction Method
… to study radio propagation and rough surface scattering problems based on a reformulation of the Magnetic Field Integration Equation (MFIE) called the Single-Scatter Subtraction (S^3) method. This technique amounts to a physical preconditioning by separating the single- and multiple-scatter …
-
Analysis of the single scatter albedo and imaginary index of refraction of fused silica nanospheres via a photoacoustic technique and a novel aerosol generator
This experiment sought to study the single scatter albedo (SSA) and imaginary index of refraction of 300nm fused silica spheres using the in-situ technique of photoacoustic spectroscopy. Through the use of a novel aerosol generator, sample aerosol streams were generated and sampled via a 4 …
-
Modellbasierte Korrektur der Streustrahlung in der Positronen-Emissions-Tomographie
… eine rechenzeitoptimierte Implementierung des Single Scatter Simulation (SSS-) Algorithmus. Die Methode wurde mit Hilfe von Phantom-Messungen an einem modernen 3D-PET-Scanner validiert. Die Resultate zeigen, dass durch diesen Ansatz eine exaktere Schätzung des Streuanteils möglich ist als mit …
-
Measurement of the spectra of multiply-scattered radiation in a medium irradiated with Co60 gamma rays
A knowledge of the spectral distribution of scattered radiation at a point is of value in planning effective radiation therapy and adequate personnel protection. Some spectra have been calculated theoretically or measured experimentally for a few particular irradiation conditions. In this …
-
Characterization of the physical, chemical, and optical properties of atmospheric aerosol particles in New Hampshire
… budget of the Earth, and degrade visibility, by scattering and absorbing short-wavelength solar radiation. However, the radiative effect of aerosols is highly uncertain due to the non-uniform spatial distribution of the particles over Earth, their heterogeneous chemical composition, and their …
-
High-energy Neutron Backgrounds for Underground Dark Matter Experiments
… can achieve a >90% efficiency for tagging the single-scatter neutrons. In addition, a one-quarter scale prototype detector for neutron veto has been built and tested.</p>
-
A Computationally Efficient Moment-Preserving Monte Carlo Electron Transport Method with Implementation in Geant4
… DCS with longer mfps. Utilizing pre-existing single-scatter algorithms for transporting particles, a solution to the aforementioned transport equation is obtained efficiently with analog level accuracy. The process of constructing ROP models and their properties are presented in detail. A wide …
-
Assessing the dependence of bulk ice properties from probes with anti-shatter tips on environmental conditions
… impacts of artifacts on bulk microphysical and scattering properties were examined by quantifying differences between such properties derived from 2DCs with standard and anti-shatter tips, and with and without the use of shatter detection algorithms using the ISDAC and IDEAS-2011 data. Using …
-
Propagation and Scattering of Waves by Terrain Features
… natural terrain features on the propagation and scattering of waves. It begins with the rough knife obstruction case, moves into rough surfaces and finally concludes with several approaches to a foliage covered rough surface. Each of these problems is encountered in radar, remote sensing and …