Sökning: "the manifold subject"

Visar resultat 6 - 10 av 13 avhandlingar innehållade orden the manifold subject.

1. 6. Thermal Cycling, Creep- and Tensile Testing of Cast Exhaust Materials at Elevated Temperatures

   Författare :Christian Öberg; Stefan Jonsson; Henrik Östling; KTH; []
   Nyckelord :creep; constant-load; thermal cycling; tensile test; cast materials; cast iron; exhaust materials.; Teknisk materialvetenskap; Materials Science and Engineering;

   Sammanfattning : An exhaust manifold of a truck engine is subjected to tough conditions. As the truck is started, operated and shut down, it becomes subjected to thermal cycling up to around 800°C. At such high temperatures, corrosion, fatigue and creep are active degradation mechanisms. LÄS MER

3. 7. Localization, supersymmetric gauge theories and toric geometry

   Författare :Jacob Winding; Maxim Zabzine; Sara Pasquetti; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Supersymmetry; gauge theory; localization; toric geometry; Theoretical Physics; Teoretisk fysik;

   Sammanfattning : Gauge theories is one of the most pervasive and important subject of modern theoretical physics, and there are still many things about them we do not understand. In particular dealing with strongly coupled theories where normal perturbative techniques do not apply is a fundamental open problem. LÄS MER

4. 8. On Applying Ontologies in Workflows : Ontology driven Workflows for increasing Flexibility and Quality and reducing Production Time and Cost

   Författare :Gunnar Mosnik; Per Flensburg; Basim Al-Najjar; Christian Stary; Linnéuniversitetet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Ontology; workflow; workflow management system; effects on workflow; improvement of communication in workflows; network society; Industrial engineering and economy; Industriell teknik och ekonomi; Terotechnology; Systemekonomi;

   Sammanfattning : The trend in business goes to higher flexibility of companies due to the manifold wishes of the customer, which challenges information systems. A consequence is the mass customisation, the effort to produce different variants of one product to meet the multifaceted needs of as many customers as possible. LÄS MER

5. 9. Diluted Operation of a Heavy-Duty Natural Gas Engine - Aiming at Improved Effciency, Emission and Maximum Load

   Författare :Mehrzad Kaiadi; Förbränningsmotorer; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Turbulence; Natural gas engine; Dilution limit; VGT; Cyclic variation; Closed-loop control; Heavy-duty;

   Sammanfattning : Most heavy-duty engines are diesel operated. Severe emission regulations, high fuel prices, high technology costs (e.g. catalysts, fuel injection systems) and unsustainably in supplying fuel are enough reasons to convenience engine developers to explore alternative technologies or fuels. LÄS MER

7. 10. Representation and diurnal variation of upper tropospheric humidity in observations and models

   Författare :Ajil Kottayil; Byung-Ju Sohn; Luleå tekniska universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Rymdteknik; Space Technology;

   Sammanfattning : The role of water vapour is manifold in its climate regulation of the Earth system. Most important of all despite its low concentration, is the role it plays in the upper troposphere. LÄS MER