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Visar resultat 16 - 20 av 208 avhandlingar som matchar ovanstående sökkriterier.

1. 16. Ventilation of a Model Hydro-Generator, An Experimental and Numerical Study

   Författare :Hamed Jamshidi; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; CFD; Ventilation; Hydro Power Generator; Experiment;

   Sammanfattning : Generators are sophisticated machines used to convert the mechanical energy of a prime mover into electrical energy. Electromagnetic and mechanical losses accompany this energy conversion process. Cooling systems remove the heat, generated by losses, from these machines. LÄS MER

3. 17. The effect of mechanical ventilation on the abdominal organs

   Författare :Silvia Marchesi; Miklós Lipcsey; Anders Larsson; Göran Hedenstierna; Eddie Weitzberg; Uppsala universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Mechanical ventilation; abdominal organs; diffusion weighted imaging; magnetic resonance; perfusion; edema; inflammation; Anestesiologi och intensivvård; Anaesthesiology and Intensive Care;

   Sammanfattning : During mechanical ventilation (MV), the interplay between abdomen and thorax has been studied unilaterally focusing on the effect that an increased abdominal pressure would have on the thorax. Only a small cluster of studies offered a different perspective showing a lower inflammation and a better lymphatic clearance of edema in abdominal organs when spontaneous breathing was applied compared to MV. LÄS MER

4. 18. Optimization of the Flow Process in Engine Bays - 3D Fan Modeling Strategies

   Författare :Peter Gullberg; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Cooling; Fan; Aerodynamics; Underhood Thermal Management; CFD;

   Sammanfattning : In todays automotive industry there is an apparent need and demand for low fuel consuming vehicles. This is a fact every automotive OEM is aware of and the heavy duty truck industry is no exception. With a cooling fan in today’s trucks that typically consumes of the order of magnitude 50bHp fully engaged - reducing this loss is very important. LÄS MER

5. 19. ON THE EFFICIENCY OF DISPLACEMENT VENTILATION, with Particular Reference to the Influence of Human Physical Activity

   Författare :Magnus Mattsson; Högskolan i Gävle; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Displacement ventilation; Ventilation efficiency; Physical activity; Human activity; Movements; Transient behaviours; Ceiling height; Wall temperature.; Building engineering; Byggnadsteknik; Fluid mechanics; Strömningsmekanik;

   Sammanfattning : The efficiency of room ventilation by the displacement principle was studied with respect to some influential factors, in particular that of physical activity. The study was experimental and performed in two full-scale test rooms, one of office-size and one of classroom-size. LÄS MER

7. 20. Protective Mechanical Ventilation in Inflammatory and Ventilator-Associated Pneumonia Models

   Författare :Jesper Sperber; Jan Sjölin; Markus Castegren; Anders Larsson; Anders Larsson; Anders Oldner; Uppsala universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Mechanical ventilation; Systemic inflammation; Pneumonia; Ventilator-associated pneumonia; Endotoxin; Anestesiologi och intensivvård; Anaesthesiology and Intensive Care;

   Sammanfattning : Severe infections, trauma or major surgery can each cause a state of systemic inflammation. These causes for systemic inflammation often coexist and complicate each other. Mechanical ventilation is commonly used during major surgical procedures and when respiratory functions are failing in the intensive care setting. LÄS MER