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The authors give a critical discussion of different current band structure schemes and their relaxation to experiment. They then discuss the connections, exact and approximate, that exist between the electron self-energy and experiment, considering in particular optical absorption and photoemission. Different computationally feasible approximation schemes based on a dynamic generalization of the n
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En fråga som ställer till problem i straffrättskipningen är hur flera systematiskt begångna brott skall bedömas. Kan man behandla 100 ringa narkotikabrott, som begåtts systematiskt — affärsmässiga överlåtelser av små mängder narkotika — som 100 grova narkotikabrott, eller som ett enda grovt narkotikabrott? Hur hanterar man 20 bedrägerier, som ingår i en från början uppgjord brottsplan? Artikelförf
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Many aspects of present energy systems and the direction towards future energy systems are incompatible with sustainable development. Sustainable bioenergy systems contribute to combating climate change and improving energy security. Expanding bioenergy decreases carbon dioxide emissions if replacing fossil fuels, establishing energy crops, or integrating with carbon capture and storage, and incre
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Soot particles can be formed in hydrocarbon flames as a result of an inefficient combustion process. The particles are near-spherical, and normally a few tens of nanometers in diameter. At later stages in the soot growth process, they form chain-like sparse aggregates. When applying optical diagnostic methods such as combined scattering and extinction measurements in sooting flames, this aggregati