Search for dissertations about: "Andrew Ray"

Showing result 1 - 5 of 9 swedish dissertations containing the words Andrew Ray.

2. 1. Lessons learned from time-resolved X-ray spectra of gamma-ray bursts

   Author : Vlasta Valan; Josefin Larsson; Nederländern Professor Andrew Levan Nederländern Radboud Universiteit Andrew Levan; KTH; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Physics; Fysik;

   Abstract : Gamma-ray bursts (GRBs) are among the brightest and most energetic phenomena in the Universe, observed up to great distances. The early X-ray emission ofgamma-ray bursts are usually well described by absorbed power laws. However,in some cases, additional thermal components have been identified. READ MORE

4. 2. Characterizing the X-ray Properties of Clusters of Galaxies

   Author : Karl Andersson; Ariel Goobar; Andrew Fabian; Stockholms universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Physics; Fysik; Physics; fysik;

   Abstract : Clusters of galaxies are the most massive bound structures known and represent a fair sample of the baryonic and dark matter content of the universe. The hot baryonic gas present in cluster dark matter halos cause them to emit in the X-ray band. READ MORE

5. 3. Open-Framework Germanates : Synthesis, Structure, and Characterization

   Author : Andrew Kentaro Inge; Xiaodong Zou; Anthony Cheetham; Stockholms universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Open-framework; zeolites; germanates; porous materials; crystallography; hydrothermal synthesis; crystal structure; Structural Chemistry; strukturkemi;

   Abstract : Novel open-framework germanates and open low-dimensional structures were synthesized and characterized. Their crystal structures were solved by single crystal X-ray diffraction or X-ray powder diffraction combined with other techniques. READ MORE

6. 4. Prussian blue analogue copper hexacyanoferrate : Synthesis, structure characterization and its applications as battery electrode and CO2 adsorbent

   Author : Dickson Odhiambo Ojwang; Gunnar Svensson; Jekabs Grins; Andrew Goodwin; Stockholms universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; copper hexacyanoferrate; synthesis; structure refinement; thermal dehydration; CO2 adsorption; kinetic analysis; in operando synchrotron X-ray diffraction; Inorganic Chemistry; oorganisk kemi;

   Abstract : Prussian blue (PB) and Prussian blue analogues (PBAs) are compounds with potential applications in a large variety of fields such as gas storage, poison antidotes, electrochromism, electrochemistry and molecular magnets. The compounds are easy to synthesize, cheap, environmentally friendly and have been pursued for both fundamental research and industrial purposes. READ MORE

7. 5. Characterization and Optimization of Silicon-strip Detectors for Mammography and Computed Tomography

   Author : Han Chen; Mats Danielsson; cheng xu; Andrew Maidment; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; mammography; anti-scatter grid; photon-counting; spectral computed tomography; silicon strip; ASIC; energy resolution; Compton scatter; material decomposition; K-edge imaging; Medical Technology; Medicinsk teknologi;

   Abstract : The goal in medical x-ray imaging is to obtain the image quality requiredfor a given detection task, while ensuring that the patient dose is kept as lowas reasonably achievable. The two most common strategies for dose reductionare: optimizing incident x-ray beams and utilizing energy informationof transmitted beams with new detector techniques (spectral imaging). READ MORE