Search for dissertations about: "In-situ measurement"

Showing result 21 - 25 of 128 swedish dissertations containing the words In-situ measurement.

  2. 21. Methods for localizing and quantifying radionuclide sources and deposition using in situ gamma spectrometry : Critical review of the peak-to-valley method based on experimental studies and applications in Georgia and Japan

    Author : Karl Östlund; Malmö Medicinsk strålningsfysik; []
    Keywords : In situ gamma spectrometry;

    Abstract : This thesis describes investigations made on mobile and stationary gammaspectrometry made both under laboratory conditions and in situ. The objective hasbeen to identify and quantify radionuclides in the form of point sources,contamination and widespread deposition in situations where the measurementgeometry is not known beforehand. READ MORE

  4. 22. Unveiling catalytic species in suspension/solution-based reactions by in situ X-ray absorption spectroscopy

    Author : Ning Yuan; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : The palladium (Pd) and ruthenium (Ru) species in several attractive catalysts have been probed using X-ray absorption spectroscopy (XAS). The study of catalyst evolution in suspension- and solution-based reactions was the primary aim. It was achieved by performing in situ XAS experiments on Pd and Ru over the course of the reactions. READ MORE

  5. 23. Chemometric methods for analysis of spectroscopic data from batch process monitoring

    Author : Erik Furusjö; KTH; []
    Keywords : in situ spectroscopy; reaction monitoring; organic synthesis; solubility; crystallization; multivariate calibration; curve resolution; kinetic model; reaction rate constant; activation energy; target testing; bootstrap;

    Abstract : Understanding of a process is essential for processdevelopment, optimisation and scale-up. In situ spectroscopy isan attractive measurement technique that can increase processunderstanding, since samples need not be retrieved from theprocess mixture. READ MORE

  6. 24. Climatic conditions inside nuclear reactor containments : Evaluation of moisture condition in the concrete within reactor containments and interaction with the ambient compartments

    Author : Mikael OXFALL; Avdelningen för Byggnadsmaterial; []
    Keywords : kärnkraft; betong; in situ mätningar; relativ fuktighet; kokvattenreaktorer; tryckvattenreaktorer; masstransport;

    Abstract : Safety is the top priority at a nuclear facility. The nuclear power plants are designed to prevent radioactive leakage to the surroundings, both during normal operation as well as in case of a severe accident. One of the most important structures in a nuclear power plant, with regard to safety, is thus the reactor containment wall. READ MORE

  7. 25. Transport of Mercury Species in the Environment. Exchange between Oceanic Waters and the Atmosphere

    Author : Maria Andersson; Göteborgs universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Mercury; dissolved gaseous mercury; elemental mercury; evasion; flux; Mediterranean Sea; North Atlantic Ocean; Arctic Ocean; accumulation; in-situ measurements; on-line measurements;

    Abstract : Mercury is an element present in the earth crust as well as a component in the atmosphere. During centuries mercury has been released by natural sources, e.g. volcanic eruptions, evasion from water surfaces and degassing from soil. READ MORE