Sökning: "first principles"

Visar resultat 21 - 25 av 879 avhandlingar innehållade orden first principles.

1. 21. Improving engineering change processes by using lean principles

   Författare :Mikael Ström; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; lean; information; engineering change; principles; PLM; product development;

   Sammanfattning : The purpose of this research was to test the usefulness of the 13 lean principles for product development by Morgan & Liker when improving an engineering change (EC) process. The EC-process was studied at four firms. The firms were active in three different industrial branches. Two of the firms are situated in Sweden and two in Finland. LÄS MER

3. 22. Using Architectural Principles to make the IT-Strategy come true : focusing on the electric power ndustry

   Författare :Åsa Lindström; Torsten Cegrell; Bernt Ericsson; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Enterprise Architecture; IT-strategy; Architectural principles; IT principles; Information technology; Informationsteknik;

   Sammanfattning : Most large enterprises are facing numerous challenges concerning their information systems, IS, and information and communication technology, ICT. Today, many enterprises employ a considerable number of applications that often have redundant functionality. There is also a large diversification in the ICT products and technologies employed. LÄS MER

4. 23. Structure and spectroscopy of bio- and nano-materials from first-principles simulations

   Författare :Weijie Hua; Yi LUO; Mauro Stener; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; soft x-ray spectroscopy; bio- and nano-materials; first-principles simulation; host-guest interaction; generalized energy-based fragmentation; Quantum chemistry; Kvantkemi; Spectroscopy; Spektroskopi; SRA - Molecular Bioscience; SRA - Molekylär biovetenskap;

   Sammanfattning : This thesis is devoted to first-principles simulations of bio- and nano-materials,focusing on various soft x-ray spectra, ground-state energies and structures of isolated largemolecules, bulk materials, and small molecules in ambient solutions. K-edge near-edge x-ray absorption fine structure (NEXAFS) spectra, x-ray emission spectra, andresonant inelastic x-ray scattering spectra of DNA duplexes have been studied by means oftheoretical calculations at the density functional theory level. LÄS MER

5. 24. Magnetization dynamics on the nanoscale : From first principles to atomistic spin dynamics

   Författare :Jonathan Philippe Chico Carpio; Anders Bergman; Samir Lounis; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Physics with spec. in Atomic; Molecular and Condensed Matter Physics; Fysik med inriktning mot atom- molekyl- och kondenserande materiens fysik;

   Sammanfattning : In this thesis first-principles methods, based on density functional theory, have been used to characterize a wide range of magnetic materials. Special emphasis has been put on pairwise magnetic interactions, such as Heisenberg exchange and Dzyaloshinskii-Moriya interactions, and also on in the Gilbert damping parameter. LÄS MER

7. 25. Thermal properties of materials from first principles

   Författare :Olle Hellman; Sergey Simak; Igor Abrikosov; Risto Nieminen; Linköpings universitet; []
   Nyckelord :;

   Sammanfattning : In the search of clean and efficient energy sources intermediate temperature solid oxide fuel cells are among the prime candidates. What sets the limit of their efficiency is the solid electrolyte. A promising material for the electrolyte is ceria. LÄS MER