Search for dissertations about: "expander"

Showing result 1 - 5 of 16 swedish dissertations containing the word expander.

  1. 1. Dynamic principles in craniofacial surgery. Expander elements in craniofacial surgery

    Author : Fredrik Gewalli; Göteborgs universitet; Göteborgs universitet; Gothenburg University; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Scaphocephaly; Brachycephaly; Dynamic cranioplasty; Pi-procedure; DCB; Expander elements; Distraction; Mental development; ICP; Cephalometry; Cephalic index;

    Abstract : Lannelongue & Lane described strip removal of ossified skull sutures in craniosynostosis in the 1890s. More complex osteotomies with bone grafting were developed during the 1960s. Dynamic techniques, utilizing force to direct the growing brain for skull reshaping was introduced by Jane 1978 with the p-plasty for sagittal synostosis. READ MORE

  2. 2. Thermodynamic Cycles for Low- and High-Temperature Waste Heat Recovery from Heavy-Duty Engines

    Author : Jelmer Johannes Rijpkema; Chalmers University of Technology; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; engine efficiency; low-temperature; organic flash cycle; heavy-duty Diesel; long haul truck; organic Rankine cycle ORC ; internal combustion engine; transcritical Rankine cycle; expander; trilateral flash cycle; waste heat recovery;

    Abstract : To reduce the environmental impact of heavy-duty vehicles, it is critical to reduce their CO2 emissions by improving the engine efficiency. A promising way to do this is by extracting waste heat from the engine during operation and converting it into useful work. READ MORE

  3. 3. Waste Heat Recovery from Combustion Engines based on the Rankine Cycle

    Author : Gunnar Latz; Chalmers University of Technology; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; waste heat recovery; Rankine cycle; piston expander;

    Abstract : Most of the energy in the fuel burned in modern automotive internal combustion engines is lost as wasteheat without contributing to the vehicle’s propulsion. In principle some of this lost energy could becaptured and used to increase the vehicle’s fuel efficiency by fitting a waste heat recovery system to theengine. READ MORE

  4. 4. Intra-oral soft tissue expansion and volume stability of onlay bone grafts

    Author : Peter Abrahamsson; Malmö högskola; []
    Keywords : MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES;

    Abstract : Implantat är idag en väl etablerad behandlingsform. I många fallfinns dock inte tillräckligt med käkben för att på ett optimalt sättkunna rekonstruera patientens bett såväl ur funktionell som estetisksynpunkt. I dessa fall används olika tekniker för att tillförakäkben. READ MORE

  5. 5. A mechanical model of an axial piston machine

    Author : Rasmus Löfstrand Grip; Ulf Sellgren; Niclas Strömberg; KTH; []
    Keywords : ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; Multi-body mechanical model; axial piston; Z-shaft; wobble plate; Sophia; Engineering mechanics; Teknisk mekanik;

    Abstract : A mechanical model of an axial piston-type machine with a so-called wobble plate and Z-shaft mechanism is presented. The overall aim is to design and construct an oil-free piston expander demonstrator as a first step to realizing an advanced and compact small-scale steam engine system. READ MORE