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  • Vacancy defect distributions in bulk ZnO crystals

    We have used positron annihilation spectroscopy to study vacancy defects in ZnO single crystals grown by various methods from both commercial and academic sources. The combination of positron lifetime and Doppler broadening techniques with theoretical calculations provides the means to deduce both the identities and the concentrations of the vacancies. The annihilation characteristics of the Zn and O vacancies have been determined by studying electron-irradiated ZnO grown by the seeded vapor ...

    Stability, cation ordering and oxygen non-stoichiometry of some perovskites and related layered oxides

    Perovskites and perovskite-related layered oxides have been widely studied for various applications due to their interesting physical and chemical properties. This thesis investigates the thermal stability, cation ordering and oxygen non-stoichiometry of several perovskite-related materials. Effects of various cation substitutions on the cation ordering, thermal stability and physical properties of Sr2MgMoO6−δ double perovskite were investigated. Replacing Mg with transition metal atoms e...


    Raportissa tarkastellaan ikääntyneiden tarpeisiin vastaavaa palvelukortteli -konseptia. Siinä esitellään olemassa olevia ikääntyneille suunnattuja palvelu- ja asumiskohteita Ruotsissa, Hollannissa ja Saksassa sekä hyviä käytäntöjä Suomessa. Meneillään olevaa kehitystyötä liittyen ikääntyneiden asumiseen Suomessa tarkastellaan Aalto-yliopiston arkkitehtuurin laitoksen Sotera-instituutin koordinoiman Muuttuva yhteiskunta – Muuttuvat palvelut -hankkeen tulosten kautta. Palvelukorttelia käsitellä...

    Actors and institutions in the emergence of a new field : a study of the cholesterol-lowering functional foods market

    Rapid scientific and technological progress has resulted in the blurring of traditional industry boundaries and in the emergence of new product markets and broader organisational fields. Despite recent scholarly interest in field emergence, there is still little knowledge on how new fields emerge at the intersection of established industries and on the multi-local nature of the phenomenon. The purpose of this study is to increase the understanding of the interaction between actors and institu...
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