Sökning: "Fredrik Karlsson"

Visar resultat 1 - 5 av 48 avhandlingar innehållade orden Fredrik Karlsson.

  1. 1. Utvärdera Informationssystem : Pragmatiskt perspektiv och metod

    Författare :Jenny Lagsten; Göran Goldkuhl; Fredrik Karlson; Ola Henfridsson; Fredrik Karlsson; Linköpings universitet; []
    Nyckelord :SOCIAL SCIENCES; SAMHÄLLSVETENSKAP; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Information systems; IS evaluation; evaluation method; pragmatism; evaluation use; Informationssystem; IS-utvärdering; utvärderingsmetod; pragmatism; utvärderingsbruk; TECHNOLOGY; TEKNIKVETENSKAP; Informatik; Informatics;

    Sammanfattning : Syfte: Det övergripande syftet med avhandlingen är att utveckla en intressentbaseradutvärderingsmetod för att utvärdera informationssystem. Jag har valt attkalla utvärderingsmetoden för VISU (Verksamhetsutvecklande InformationssystemUtvärdering). LÄS MER

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

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

    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. 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; 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

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

    Författare :Fredrik Karlsson; Chalmers University of Technology; []
    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

  5. 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