Search for dissertations about: "PSD"

Showing result 1 - 5 of 44 swedish dissertations containing the word PSD.

  1. 1. Neural Networks Applications and Electronics Development for Nuclear Fusion Neutron Diagnostics

    Author : Emanuele Ronchi; Sean Conroy; Basilio Esposito; Uppsala universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Neural networks; tomography; unfolding; real time; pulse shape discrimination; PSD; neutron spectroscopy; MPRu; TOFOR; KN3; neutron camera; LED; summing amplifiers; electronics; JET; Plasma physics; Plasmafysik; Computational physics; Beräkningsfysik; Applied Nuclear Physics; Tillämpad kärnfysik; Elektronik; Electronics;

    Abstract : This thesis describes the development of electronic modules for fusion neutron spectroscopy as well as several implementations of artificial neural networks (NN) for neutron diagnostics for the Joint European Torus (JET) experimental reactor in England.The electronics projects include the development of two fast light pulser modules based on Light Emitting Diodes (LEDs) for the calibration and stability monitoring of two neutron spectrometers (MPRu and TOFOR) at JET. READ MORE

  2. 2. Ion Beam Analysis - Development and Application of Nuclear Reaction Analysis Methods, in particular at a Nuclear Microprobe

    Author : K Anders Sjöland; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; ION BEAM ANALYSIS; HYDROGEN ANALYSIS; LITHIUM ANALYSIS; BORON ANALYSIS; FLUORINE ANALYSIS; BNCT; PSD; AFFECTIVE DISORDER; STIM; NRA; PIXE; SURFACE BARRIER DETECTORS; pNRA; Kärnfysik; Nuclear physics; DEPTH PROFILING; NUCLEAR MICROPROBE; PILE-UP REJECTION; Fysicumarkivet A:1996:Sjöland;

    Abstract : This thesis treats the development of Ion Beam Analysis (IBA) methods, principally for the analysis of light elements at a nuclear microprobe (NMP). The light elements are in this context defined as those with an atomic number Z of less than approximately 13 (aluminium). The work reported is to a large extent based upon multiparameter methods. READ MORE

  3. 3. Quantitative Electron Microscopy Studies of Metal Nanoparticle Catalysts: Nanostructure, Support Interaction and Ageing Effects

    Author : Torben Nilsson Pingel; Chalmers University of Technology; []
    Keywords : CO oxidation; strain; ageing; specimen preparation; scanning electron microscopy SEM ; FIB SEM; supported nanoparticle catalyst; transmission electron microscopy TEM ; particle size distribution PSD ; platinum;

    Abstract : Heterogeneous catalysis plays a major role in modern society, for example in chemical production, sustainable energy production and emission control technologies. Metal nanoparticles (NPs) supported on oxide materials are frequent catalytic systems in this field. READ MORE

  4. 4. Quantitative studies of changes in microstructure and activity during ageing of supported catalysts

    Author : Torben Pingel; Chalmers University of Technology; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; supported nanoparticle catalyst; scanning electron microscopy SEM ; quantitative; bimetallic catalyst; ageing properties; CO oxidation; FIB SEM; specimen preparation; particle size distribution PSD ; transmission electron microscopy TEM ;

    Abstract : Catalytic converters have substantially contributed to the improvement of air quality in populated areas in the last decades by abatement of the emission of hazardous componentssuch as CO, unburned hydrocarbons and NOx. However, due to the exposure to high temperature and different components in the exhaust gas, the performance of the catalysts degrades with time. READ MORE

  5. 5. Community-based customer involvement for improving packaged software development

    Author : Helena Holmström; Göteborgs universitet; Göteborgs universitet; Gothenburg University; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Packaged software development; software improvement; virtual communities; customer involvement; community knowledge; community-based customer involvement;

    Abstract : Noting the widespread use of virtual communities for interacting with customers, this thesis explores the role of virtual communities for involving distributed customers in packaged software development (psd) and the opportunities and challenges that are associated with this. While the idea of involving customers in software development is not new, it is yet to gain momentum in psd. READ MORE