Sökning: "differential measurements"

Visar resultat 11 - 15 av 207 avhandlingar innehållade orden differential measurements.

  1. 11. Optical techniques for measurements of atmospheric trace gases

    Författare :Pär Ragnarson; [1994]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Fysicumarkivet A:1994:Ragnarsson;

    Sammanfattning : Differential optical absorption spectroscopy (DOAS) and differential absorption lidar (DIAL) have been used for measurement of atmospheric trace gases. A fully automated system for atmospheric pollution monitoring of a medium-sized city has been constructed, based on the DOAS technique. LÄS MER

  2. 12. Computed Tomography of Acetabular Cup Wear and Effect of Surface Roughness on Wear and Oxidation of UHMWPE Hip Prostheses

    Detta är en avhandling från Stockholm : KTH

    Författare :Anneli Jedenmalm; KTH.; [2007]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Hip prostheses; Computed Tomography; Surface roughness; UHMWPE; Wear; Coating; Gamma-irradiation; pin-on-disc; hip simulator; TECHNOLOGY Other technology Medical engineering; TEKNIKVETENSKAP Övriga teknikvetenskaper Medicinsk teknik;

    Sammanfattning : Aseptic loosening is the most common complication in total hip replacement (5- 10% at 10 years follow up). The magnitude of the problem is illustrated by the fact that about one million hip prostheses are implanted worldwide each year. LÄS MER

  3. 13. Optimal Control of Partial Differential Equations in Optimal Design

    Detta är en avhandling från Stockholm : KTH

    Författare :Jesper Carlsson; KTH.; [2008]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Optimal design; MATHEMATICS Applied mathematics Numerical analysis; MATEMATIK Tillämpad matematik Numerisk analys;

    Sammanfattning : This thesis concerns the approximation of optimally controlled partial differential equations for inverse problems in optimal design. Important examples of such problems are optimal material design and parameter reconstruction. In optimal material design the goal is to construct a material that meets some optimality criterion, e.g. LÄS MER

  4. 14. Characterisation and application of a laser-based hard x-ray source

    Detta är en avhandling från Department of Physics, Lund University

    Författare :Matthias Grätz; Lunds universitet.; Lund University.; [1998]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; X-ray spectroscopy; radiography; medical imaging; differential imaging; time-gated imaging; scatter reduction; Monte Carlo simulation; Atomic and molecular physics; computed tomography; Fysicumarkivet A:1998:Grätz; laser-produced plasma; Atom- och molekylärfysik; X-ray sources;

    Sammanfattning : Hard X-rays are generated by focusing 110 fs laser pulses with intensities of about 1017 W·cm-2 onto solid metal targets. Characteristic properties of this X-ray source are the small source size, the short pulse duration and the high peak flux. LÄS MER

  5. 15. Development and Characterisation of a Laser-Based Hard X-Ray Source

    Detta är en avhandling från Department of Physics, Lund University

    Författare :Carl Tillman; [1996]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; laser-produced plasma; X-ray source; laser; X-ray spectroscopy; dosimetry; radiography; medical imaging; radiation effects; differential imaging; Fysicumarkivet A:1996:Tillman; Atom- och molekylärfysik; Atomic and molecular physics;

    Sammanfattning : Popular Abstract in Swedish I denna avhandling presenteras en ny typ av röntgenkälla baserad på ett laser-producerat plasma. Röntgenstrålning alstras genom att fokusera laserpulser på ett strålmål. LÄS MER