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Reactive Sintering of Cu-Al, Ni-Al and Ni-Ti Powder Mixtures

Intermetallic compounds are a distinct group of materials having attractive properties and wide applications. In the present work, the formation of intermetallic compounds from elemental components in Cu-Al, Ni-Al and Ni-Ti systems has been studied. Metallic powders were mixed in stoichiometric ratios corresponding to CuAl2, NiAl and NiTi. Calorimetric studies were made using compacted disks as we

Topics in Authentication Theory

Authentication theory deals with problems connected with the protection of information sent over insecure channels. This thesis concerns different problems in authentication theory. In particular, we consider unconditionally secure authentication, i.e., providing authentication protection agains an enemy equipped with unlimited computing power. Several topics in authentication theory are treated:

Upplysningen i nytt ljus: Kvinnor, begär och offentlighet hos Montesquieu

Under senare år har postmoderna företrädare ifrågasatt liberalismen som politiskt värdesystem. Parallellt med den postmoderna diskussionen har det förts en teoretisk debatt om en annan inflytelserik idétradition med rötter i antiken: den klassiska eller medborgerliga republikanismen.I artikeln argumenteras för att republikanismen främjade ett frihetsbegrepp som omfattade krav på vidgade medborgerl

Uncertainty of oscillator strengths derived from lifetimes and branching fractions

A widely used method for determination of transition probabilities and oscillator strengths is based on measurements of branching fractions and radiative lifetimes. In the present work the different sources of uncertainty in branching fraction measurements using Fourier transform spectroscopy and lifetime measurements using laser induced fluorescence are discussed. A detailed description is presen

Competing on Manufacturing How combinations of resources can be a source of competitive advantage

Popular Abstract in Swedish En central fråga av både teoretisk och praktisk betydelse är varför vissa företag är mer framgångsrika - vilket ofta uttrycks som att de har större konkurrensfördelar - än andra. Speciellt uppkommer frågan då vissa fabriker inom samma företag år efter år uppvisar ett bättre ekonomiskt resultat än andra. Fokus i denna avhandling är att förstå varför så sker inom ett utvaThe most central question in the strategic management literature is why some firms are more successful than others, often expressed as an aim to understand sources of competitive advantage. In this thesis, an empirical observation is made that a number of manufacturing plants belonging to the same firm show sustainable differences in financial success, and the question is why. The main theoretical