Search for dissertations about: "Absorbance"

Showing result 1 - 5 of 74 swedish dissertations containing the word Absorbance.

  2. 1. Spectral analysis in laser powder bed fusion

    Author : Benedikt Brandau; Frank Brückner; Alexander Kaplan; Dan Roth-Fagaraseanu; Luleå tekniska universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Spectral monitoring; Laser powder bed fusion; Laser optics; Absorbance; Produktionsutveckling; Manufacturing Systems Engineering;

    Abstract : This thesis is about the investigation of the spectral interaction of electromagnetic radiation with metal powders. For this purpose, spectral data of powders for laser powder bed fusion processes are investigated in three papers using different techniques. READ MORE

  4. 2. Nanostructured Semiconductor Materials for Light Manipulation Functions

    Author : Dennis Visser; Srinivasan Anand; Alvaro Blanco; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; semiconductor materials; c-Si; a-Si; GaInP; TiO2; ZnO; nanostructuring; light manipulation functions; top-down fabrication; embossing; FDTD simulations; nanowires; nanopillars; nanodisks; microcones; optical response; reflectance; transmittance; absorbance; spectrophotometry; photoluminescence; Mie resonators; mode coupling; broadband anti-reflection; light extraction enhancement; optical sensing; optical color filters; color conversion; Optik och fotonik; Optics and Photonics;

    Abstract : Structuring of semiconductor materials is utilized in many optoelectronic devices, e.g, in order to make them more efficient, cost-effective, and/or to obtain specific wavelength-engineered responses. Semiconductor materials are widely used in optoelectronic devices due to their favorable optical and electric properties. READ MORE

  5. 3. Haemodialysis Treatment Monitored On-line by Ultra Violet Absorbance

    Author : Fredrik Uhlin; Lars-Göran Lindberg; Martin Magnusson; Bernd Stegmayr; Linköpings universitet; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Dialysis; Hemodialysis; Proteins; Metabolism; Renal dialysis; Ultraviolet spectrophotometry; Urea; Uremia; Kidney diseases; Njursjukdomar;

    Abstract : This thesis describes and evaluates an optical method utilizing ultra violet (UV) absorbance for on-line monitoring of haemodialysis treatment. Increased efficiency of haemodialysis treatment is considered to correlate to decreased morbidity and mortality when urea clearance (Kt/V) is elevated. READ MORE

  6. 4. Seasonal variation and landscape regulation of dissolved organic carbon concentrations and character in Swedish boreal streams

    Author : Anneli Ågren; Mats Jansson; Irena Creed; Umeå universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; DOC; temporal variation; spatial variation; seasonal variation; forested catchment; wetland catchment; catchment characteristics; DOC characteristics; absorbance-ratio; bioavailability.; Physical geography; Naturgeografi;

    Abstract : The seasonal variation and landscape regulation of dissolved organic carbon (DOC) concentrations in streams have been studied in two watersheds in the boreal zone. The seasonal variation was found to be highly correlated to variations in runoff. An increase in runoff was always accompanied with an increase in DOC concentration. READ MORE

  7. 5. On the Manufacturing of SFF Based Tooling and Development of SLS Steel Material

    Author : Klas Boivie; KTH; []
    Keywords : Solid Freeform Fabrication; Metallic Materials; Selective Laser Sintering; Liquid phase sintering; Powder density; Particle size range; Inter-particle friction; Green bodies; Laser absorbance; Secondary heating; self Diffusion; Dissolving rate;

    Abstract : .... READ MORE