Search for dissertations about: "Kristoffer Karlsson"

Found 4 swedish dissertations containing the words Kristoffer Karlsson.

  2. 1. Gap discharge transducers applied to ultrasonic flow measurement

    Author : Kristoffer Karlsson; Per Lunde; Luleå tekniska universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Industriell elektronik; Industrial Electronics;

    Abstract : In this thesis, the potential of the gap discharge transducer is investigated as both a sound pulse emitter and a sound pulse receiver in a gas flow measurement setup. The main objective is to use the gap discharge transducer as an integral part in a gas flow measurement system developed for harsh environments. READ MORE

  4. 2. Gap Discharge Transducers in a Transit Time Flow Measurement System Designed for Harsh Environments

    Author : Kristoffer Karlsson; Per Lunde; Luleå tekniska universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Industriell elektronik; Industrial Electronics;

    Abstract : In this thesis, the potential of the gap discharge transducer is investigated as transducers in a time-of-flight gas flow measurement setup designed for harsh environments.In this thesis the gap discharge transducer is operated in two different modes, named spark discharge transducer and glow discharge transducer. READ MORE

  5. 3. Characterization of aluminum in environmental systems using X-ray absorption and vibrational spectroscopy : The importance of organic matter

    Author : Kristoffer Hagvall; Torbjörn Karlsson; Per Persson; Lars Lövgren; Dan Berggren Kleja; Umeå universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : The fate and behavior of many metals in the environment are highly dependent on interactions with natural organic matter (NOM), which is abundant in most soils and surface waters. The complexation with NOM can influence the speciation of the metals by affecting their hydrolysis and solubility. READ MORE

  6. 4. Predicting Ecosystem Response from Pollution in Baltic Archipelago areas using Mass-balance Modelling

    Author : Olof Magnus Karlsson; Andreas Bryhn; Lars Håkanson; Per Jonsson; Mikael Malmaeus; Kristoffer Naes; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Baltic Sea; archipelagos; aquatic ecosystems mass-balance modelling; sediment-water dynamics; phosphorus; dioxins; PCDD Fs; Other earth sciences; Övrig geovetenskap; Earth Science with specialization in Environmental Analysis; Geovetenskap med inriktning mot miljöanalys;

    Abstract : Baltic archipelago areas have high nature values despite being polluted from various antrophogenic activities within the Baltic Sea catchment area and from long-range transport of airborne substances. The discovery of environmental problems in the Baltic Sea in the 1960s led to countermeasures that gradually gave results in reducing the toxic pollution, e. READ MORE