Sökning: "endoscope"

Visar resultat 1 - 5 av 10 avhandlingar innehållade ordet endoscope.

1. 1. Nasal polyps. A clinical study of endoscopic score systems and epidemiology

   Författare :Leif Johansson; Göteborgs universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; nasal polyps; score system; endoscope; epidemiology; airways; HRQL;

   Sammanfattning : Introduction: Nasal polyps are a common disease, the etiology and pathogenesis of which are still unclear. For diagnosis, a nasal endoscope is essential, while for follow-up treatment, a reliable score system is necessary. The existing score systems consist of few score steps and measure only large changes in polyp size. LÄS MER

3. 2. Low Emission Concepts for Diesel Engines

   Författare :Arjan Helmantel; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; post injection; adjustable valve timing; two-colour pyrometry; Homogeneous Charge Compression Ignition; emissions; piezo injector; swirl; combustion; Diesel; HCCI; endoscope;

   Sammanfattning : In the recent past, the Diesel engine has been improved considerably in the areas of performance, fuel efficiency and exhaust emissions. In Europe, these improvements have resulted in a strong increase in the sales of passenger cars equipped with a Diesel engine. LÄS MER

4. 3. Adult human neural stem cells : properties in vitro and as xenografts in the spinal cord

   Författare :Ulf Westerlund; Karolinska Institutet; Karolinska Institutet; []
   Nyckelord :Action potential; adult; allodynia; auto-transplantation; endoscope; glutamate; hippocampus; human; neural stem cells; p75; patch clamp; progenitor; spinal cord injury; subventricular zone; synapse; transplantation;

   Sammanfattning : Though the presence of stem cells in the adult human brain has been presented earlier, much has yet to be discovered about these cells. However, the mere potential of these cells has had a significant impact of how we today evaluate the regenerative capacity of the central nervous system and, importantly, on the possible means for science to provide insights in neural repair. LÄS MER

5. 4. Endoscopic diagnosis of reflux-oesophagitis with special regard to computerized image processing

   Författare :Hanne Witt; Karolinska Institutet; Karolinska Institutet; []
   Nyckelord :endoscopy; reflux esophagitis; computerized image processing; mucosalhemoglobin content; chromoscopy;

   Sammanfattning : The advent of the video endoscope is an important step in endoscope technology and it is of vital importance in the linkage between endoscopy and computers. The Charge Coupled Device ( CCD ) of an electric video endoscope transforms the light reflected from the mucosa into electric signals. LÄS MER

7. 5. Particulate Formation in GDI Engines

   Författare :Sreelekha Etikyala; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; PM; Alternate fuels; Gasoline Direct Injection; internal combustion engines; Particulate Number; Load transients;

   Sammanfattning : The need to comply with stringent emission regulations while improving fuel economy and reducing criteria pollutant emissions from transportation presents a major challenge in the design of gasoline Direct Injection (DI) engines because of the adverse effects of ultrafine Particulate Number (PN) emissions on human health and other environmental concerns. With upcoming advances in vehicle electrification, it may be the case that electric vehicles completely replace all current vehicles powered by internal combustion engines ensuring zero emissions. LÄS MER