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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 374 for “"X-rays"”.
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Recent Developments in X-Rays
… have been offered to account for the nature of X-rays though none have satisfactorily explained the phenomena. With the discovery that they can be reflected and diffracted from crystals, increased interest has been shown in the attempt to reconcile certain theories with the observed facts. The …
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Visualizing fluidized beds with X-rays
<p>This study applies minimum fluidization velocity experiments, X-ray computed tomography (CT), X-ray stereography, and particle tracking to fluidized beds of glass beads, ground walnut shell, and ground corncob operating with a variety of flow conditions. 3-D local, time-averaged gas holdup is …
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Adaptive control of coherent soft X-rays
The availability of coherent soft x-rays through the nonlinear optical process of high-harmonic generation allows for the monitoring of the fastest events ever observed in the laboratory. The attosecond pulses produced are the fundamental tool for the time-resolved study of electron motion in …
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Generating Synthetic X-rays Using Generative Adversarial Networks
… a novel method for generating synthetic X-rays from atypical inputs. This method creates approximate X-rays for use in non-diagnostic visualization problems where only generic cameras and sensors are available. Traditional methods are restricted to 3-D inputs such as meshes or Computed …
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Photodisintegration of Deuterium by 165 Mev X-Rays
Made available in DSpace on 2015-05-12T17:11:51Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 0009161.PDF: 3011421 bytes, checksum: a1aade4722ae5135c9f432ddde57a61b (MD5) Previous issue date: 1954
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Scattering and Absorption of X-rays by Interstellar Dust
In dieser Arbeit habe ich die Eigenschaften der interstellaren Staubpartikel untersucht, wie sie sich aus deren Wechselwirkung mit Roentgen strahlung ergeben. Tatsaechlich werden Photonen, die von einer entfernten Punktquelle stammen, von den Staubteilchen nicht nur absorbiert sondern auch in …
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Identification and reconstruction of bullets from multiple x-rays
… 3D shape and position of bullets from multiple X-rays. This technique makes use of ubiquitous X-ray equipment and a small number of X-rays to reduce the radiation dose. Our work relies on Image Segmentation and Volume Reconstruction techniques.
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Effects of Solar Soft X-rays on Earth's Atmosphere
The soft x-rays (wavelengths less than 30 nm) emitted by the sun are responsible for the production of high energy photoelectrons in the D and E regions of the ionosphere, where they deposit most of their energy. The photoelectrons created by this process are the main drivers for dissociation of …
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Automatic Chest X-rays Analysis using Statistical Machine Learning Strategies
<p>Tuberculosis (TB) is a disease responsible for the deaths of more than one million people worldwide every year. Even though it is preventable and curable, it remains a major threat to humanity that needs to be taken care of. It is often diagnosed in developed countries using approaches such as …
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Photo Disintegration of Deuterium by Ninety-Five Mev X-Rays
Made available in DSpace on 2015-05-12T17:11:47Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 0009026.PDF: 2411565 bytes, checksum: 9a94dffa3927872e8cce77d8a39d9dd1 (MD5) Previous issue date: 1954
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Genetic Effects of X-Rays on Biometric Traits in Mice
Made available in DSpace on 2014-12-10T17:37:45Z (GMT). No. of bitstreams: 1 6500932.pdf: 6424783 bytes, checksum: ee6bf9da2acfadc00cf1c09c5e810d15 (MD5) Previous issue date: 1964
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Computer aided diagnosis of miliary TB in chest X-rays
With the improvement in computer technology, Computer Aided Diagnosis (CAD) is becoming an increasingly more powerful tool for radiologists. The focus of this project was on CAD of pulmonary miliary tuberculosis. Several methods for enhancing lung textures were discussed as an aid to the …
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High resolution in-vivo electrode localization using microfocal X-rays.
Neuroscientists lack the ability to perform in-vivo electrode localization with high accuracy, especially in deep brain structures. The design, implementation and testing of a microfocal x-ray stereo system that offers an efficient, accurate, and relatively low-cost solution this localization …
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Rapid material interrogation using X rays from a dense plasma focus
… (DPF) devices are multi-radiation sources of X rays, neutrons (when working with deuterium), ions, and electrons in pulses typically of a few tens of nanoseconds. The Kansas State University device (KSU-DPF) was commissioned to be used as a radiation source with the Mechanical and Nuclear …
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Long and short term effects of X-rays on charge coupled devices
… with respect to their response to 70kVp X-rays. Process variations considered are the conventional BCCD, scintillator coated BCCDs ( (Gadox(Eu) and Csl(Tl)) and the inversion mode device. The work was made necessary by the use of these CCDs for dental X-ray imaging. Effects investigated …
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Computer-assisted detection of lung cancer nudules in medical chest X-rays
… in 1895 with Rontgen's discovery of x-rays. X-ray photography has played a very prominent role in diagnostics of all kinds since then and continues to do so. It is true that more sophisticated and successful medical imaging systems are available. These include Magnetic Resonance Imaging …
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An Evaluation of Various Avenues Available for Visualization of the Liverwith X-Rays
Made available in DSpace on 2014-12-05T22:14:34Z (GMT). No. of bitstreams: 1 0015238.pdf: 4714600 bytes, checksum: 185076636d1e3735547c7b11a6ba7909 (MD5) Previous issue date: 1955
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Capabilities and limitations of Phase Contrast Imaging techniques with X-rays and neutrons
Phase Contrast Imaging (PCI) was studied with the goal of understanding its relevance and its requirements. Current literature does not provide insight on the effect of a relaxation in coherence requirements on the PCI capabilities of an imaging system. This problem is all the more important since …
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