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 11 of 11 for “"Tomogram"”.
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Transforming Doppler tomography to unravel the accretion dynamics in cataclysmic variables
… my investigation of constructing Doppler tomograms in 'inside-out' coordinates by reversing the velocity axis. The aim was to determine if the emission distribution in the inside-out tomogram is more intuitive to interpret than the standard tomogram, and if it reveals indiscernible or …
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Design and Testing of a Laboratory Ultrasonic Data Acquisition System for Tomography
… by a mathematical transform to obtain a tomogram. This tomogram shows a pixelated distribution of the density within the sample. Each pixel represents an average value at that point. The project discussed in this paper takes the principle of ultrasonic tomography and applies it to …
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Investigating the cytoskeleton and microtubule-based transport with in situ cryo-electron tomography
… When many copies of a target are present, sub-tomogram averaging (STA) can be applied to improve resolution. I aimed to use cryo-ET to visualise cargo-bound dynein-dynactin complexes, directly in cells. I also aimed to visualise the specialised cytoskeletal environments in different cellular …
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The Relationship of Oral Anatomy and Trumpet Performance: Prediction of Physical Talent
… using a three-dimensional cone-beam computed tomogram (three-dimensional x-rays), and three-dimensional photographs at the Indiana University School of Dentistry Orthodontics and Oral Facial Genetics Department. Images obtained from these devices allowed craniofacial measurements such as …
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Helical Reconstruction in RELION
… the same methodology adapted to helical sub-tomogram averaging in RELION. Chapter 4 introduces the local symmetry option developed for special types of filaments with pseudo-helical symmetry. The concept can be extended to general single-particle analysis as well. Chapter 5 describes four …
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Integrity Assessment Of Earthen Dams And Levees Using Cross-Plot Analysis Of Seismic Refraction And Electrical Resistivity Tomograms
… seismic refraction or an electrical resistivity tomogram is an area that has different values compared to its surrounding. Geophysical anomalies in dams and levees can be due to the overall heterogeneity of the subsurface, structures such as principal spillways, artifacts of inversion software, …
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Seismic structure of the mantle beneath the southwestern Pacific
… high-resolution, two-dimensional (2-D) vertical tomogram for the corridor between the Ryukyu subduction zone and Hawaii, which traverses the Hawaiian Swell between Midway and Oahu. The data analysis, inversion procedure, and parameterization are similar to our previous study along the …
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Time-resolved and three-dimensional study of dislocation-particle interactions in aluminum and copper alloys
… an angular range then used to reconstruct the tomograms. Supplemental advances to the technique include: Visualization of dislocations in color based on Burgers vector or other relevant characteristics; determination of the specimen coordinate system in the tomogram; and overcoming the g ∙ b …
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Fantastic ribonucleoprotein complexes and how to study them. Architectural principles of regulatory assemblies in bacteria.
… order in its components. Subsequent sub-tomogram averaging approaches to investigate putative membrane-bound RNA surveillance complexes set a foundation for future structural studies.
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Time-lapse Passive Seismic Velocity Tomography of Longwall Coal Mines: A Comparison of Methods
… redistribution from the velocity images. These tomograms are unique as they are generated using source data that was collected remotely and the sources are mining-induced. Tomograms were generated using three inversion methods: simultaneous iterative reconstructive technique (SIRT), double …
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Seismic Tomography for the Integrity Assessment of Earthen Dams and Levees.
… known problems associated with seepage. Seismic tomograms are built using commercially available software for the interpretation of data collected. The results provided insights on the natural seismic variability of earthen dams. Some inferences are made on how seismic tomography images can be …