Sökning: "Fredrik karlsson"

Visar resultat 1 - 5 av 54 avhandlingar innehållade orden Fredrik karlsson.

  1. 1. Epidemiological and experimental studies on sarcoma with focus on gastrointestinal stromal tumors

    Författare :Fredrik Karlsson; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :;

    Sammanfattning : Sarcoma is the common denominator for malignant tumors of mesenchymal origin. Sarcomas encompass almost 100 diagnoses with different histology, molecular features and natural history, and may present in any part of the body. The most common sarcoma in the abdomen is the gastrointestinal stromal tumor (GIST). LÄS MER

  3. 2. Spectroscopic studies of InGaAs/GaAs/A1GaAs quantum dots and wires

    Författare :Fredrik Karlsson; Manfred Bayer; Linköpings universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : It is demonstrated that the photoluminescence (PL) spectra of single selfassembled lnAs/GaAs quantum dots (QDs) are very sensitive to excitation energy and crystal temperature, which is explained in terms of modulation of the effective diffusivity of the photogenerated carriers affecting the capture probability into theQD. This effect results in a population of the QD with excess electrons, and can be used as a simple tool to create and study charged exciton complexes. LÄS MER

  4. 3. The biology of filamentous phage infection - implications for display technology

    Författare :Fredrik Karlsson; Institutionen för immunteknologi; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Biotechnology; Bioteknik; infection mechanism; selective infection; TolA; Escherichia coli; pIII; Filamentous phage; Phage display technology;

    Sammanfattning : Phage display technology is a biotechnological tool that can be used to obtain molecules/reagents able to discriminate between target molecules. Reagents with such features can be used in diverse settings like biological chemistry, diagnostics and in therapeutic applications. LÄS MER

  5. 4. Capacity Control of Residential Heat Pump Heating Systems

    Författare :Fredrik Karlsson; RISE; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; energy efficiency; variable-speed; air-source; performance; hydronic heating system; ground-source; heat pump; defrost; optimisation; circulator; capacity control;

    Sammanfattning : Heat pumps used for space and sanitary hot water heating of residential buildings are increasingly popular in northern Europe. As they compete with other heating equipment and in order to limit the environmental impact of their use, it is very important that heat pumps are energy efficient. LÄS MER

  7. 5. Integrated Control of Heat Pumps

    Författare :Fredrik Karlsson; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; variable speed compressor; superheat; electronic expansion valve; optimisation; performance indication; control; heat pump; energy efficiency;

    Sammanfattning : The purpose of the work presented in this thesis is to investigate the potential and prerequisites for improved energy efficiency of heat pump systems using efficient components and proper methods for optimisation of operation. The background is that several investigations have reported on possibilities for increased energy efficiency of heat pumps if variable-speed capacity control is used instead of conventional on/off control. LÄS MER