Sökning: "transfer levels"

Visar resultat 16 - 20 av 547 avhandlingar innehållade orden transfer levels.

1. 16. On CFD-Analysis of Heat Transfer of a Heavy-Duty Diesel Engine

   Författare :Helgi Fridriksson; Värmeöverföring; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; CFD; Heat Transfer; Diesel Engine;

   Sammanfattning : In this work, a heavy-duty diesel engine was studied by employing CFD simulations on a closed volume engine segment. These simulations were used to evaluate both the effects from certain parameters on the wall heat transfer, and to examine how reduction of heat transfer would effect the engine performance and emission levels. LÄS MER

3. 17. Students’ meaning-making of epigenetic visual representations : An exploration within and between levels of biological organization

   Författare :Annika Thyberg; Konrad Schönborn; Niklas Gericke; Clas Olander; Karlstads universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Biological organization levels; Genetics education; Learning progression; Meaning-making of epigenetics; Secondary school; Visual representations; Yo-yo reasoning; Biology; Biologi;

   Sammanfattning : This thesis explores lower secondary students’ meaning-making of epigenetic visual representations within and between biological organization levels. Data obtained from five focus group discussions where students indicated and reasoned about eight epigenetic visual representations were explored. LÄS MER

4. 18. Learning aspect in Italian as a third language : Transfer patterns among multilingual learners in the Swedish context

   Författare :Francesco Vallerossa; Camilla Bardel; Anna Bergström; Anna Gudmundson; Llorenç Comajoan-Colomé; Stockholms universitet; []
   Nyckelord :HUMANIORA; HUMANITIES; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; conceptual linguistic transfer; L3 Italian; non- prototypical associations; Romance; tense-aspect; third language acquisition; språkdidaktik; Language Education;

   Sammanfattning : This thesis explores the impact of previously acquired or learned background languages (BL) on the learning of Italian as a third language (L3) among undergraduate students in the Swedish context. Focusing on the learning of past tense-aspect (TA) inflectional categories in Italian, the thesis investigates the influence of Swedish, English and Romance languages, French or Spanish, in light of four factors. LÄS MER

5. 19. Formation and function of wobble uridine modifications in transfer RNA of Saccharomyces cerevisiae

   Författare :Bo Huang; Anders Byström; Monica Rydén-Aulin; Umeå universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Transfer RNA; Modified nucleoside; Elongator complex; Wobble uridine; Decoding; Molecular biology; Molekylärbiologi;

   Sammanfattning : Transfer RNAs (tRNAs) act as adaptor molecules in decoding messenger RNA into protein. Frequently found in tRNAs are different modified nucleosides, which are derivatives of the four normal nucleosides, adenosine (A), guanosine (G), cytidine (C), and uridine (U). LÄS MER

7. 20. Combustion, Fluid Dynamics and Heat Transfer in Oxy-fuel and Air-Fired CFB boilers

   Författare :Sadegh Seddighi; 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; Carbon Capture and Storage; Combustion; Circulating Fluidized Bed; Oxy-Fuel; Multi-Phase Reacting Flow; Boiler Design; Emission; Fluid Dynamics; Heat Transfer;

   Sammanfattning : The studies described in this thesis develop and encode modeling tools for the design and scale-up of oxy-fuel circulating fluidized bed (CFB) boilers across a wide range of operational conditions. The modeling comprises fluid dynamics, combustion, and heat transfer and uses expressions that are proposed in this work or derived from the literature, together with experimental data obtained under both oxy-fuel-fired and air-fired conditions. LÄS MER