Sökning: "parent material"

Visar resultat 31 - 35 av 98 avhandlingar innehållade orden parent material.

  1. 31. On the relationship between microstructure, process parameters and mechanical properties of boron steels

    Författare :Erik Lundholm; Jörgen Kajberg; Andreas Lundbäck; Paul Åkerström; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Hållfasthetslära; Solid Mechanics;

    Sammanfattning : The continuous development of the press hardening technology has led to stronger, lighter and more environmentally friendly components. Utilising the varying properties of boron steel at different temperatures enables great design freedom, while also attaining high strength in the final component. LÄS MER

  3. 32. Lära och Leva : Kunskapsutveckling hos personer med en ärftlig dövhet/hörselnedsättning

    Författare :Anna-Carin Rehnman; Bozena Hautaniemi; Mats Myrberg; Berth Danermark; Stockholms universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; deafness; hearing loss; hearing impairment; knowledge; upbringing; education; hermeneutic; Paul Ricoeur; specialpedagogik; Special Education;

    Sammanfattning : The aim of this study is to explore the development of how people in different generations of a family with a hereditary hearing loss developed knowledge and to examine the role of the educational system and how it influenced this development.The research questions are:What is the prevalence of the deafness spoken of in the family chronicle?What different kinds of knowledge did the family members with deafness/hearing loss develop and how did they make use of them?In what ways may they have experienced their deafness/hearing loss as a suffering?What knowledge did they develop because the hearing loss recurred in several successive generations?The studied material includes answers from a questionnaire, different historical documents and sixteen interviews. LÄS MER

  4. 33. From meteors to space safety : dynamical models and radar measurements of space objects

    Författare :Daniel Kastinen; Johan Kero; Asta Pellinen-Wannberg; Mats Holmström; Detlef Koschny; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Meteors; meteor shower; atmosphere; meteoroids; meteoroid stream; small-body dynamics; solar system; comets; asteroids; near-Earth objects; space safety; space debris; radar; MU; EISCAT;

    Sammanfattning : Every day the Earth's atmosphere is bombarded by 10-200 metric tons of dust-sized particles and larger pieces of material from space called meteoroids. Dust and meteoroids come from parent bodies such as comets and asteroids, which are remnants from the formation of the solar system. LÄS MER

  5. 34. Att möta det oväntade : Tidigt föräldraskap till barn med Downs syndrom

    Författare :Bim Riddersporre; Institutionen för psykologi; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Development psychology; Life-world; Professional Support; Parental Attitudes; Early Parenthood; Down Syndrome; Utvecklingspsykologi; Early parenthood;

    Sammanfattning : The purpose of this dissertation was to increase - through an empirical investigation - our understanding of early parenthood in relation to children with Down syndrome. My point of departure has been the parents’ life-worlds, and I have developed an accompanying working method. LÄS MER

  7. 35. Studies of the influence of ZSM-5 synthesis on activity and stability of Cu-ZSM-5 in leand NOx reduction

    Författare :Malin Berggrund; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; HC-SCR; Cu-ZSM-5; catalysis; propene; lean NOx reduction; hydrothermal stability;

    Sammanfattning : The growing concern about the global warming coupled with the increasing emissions of the greenhouse gas carbon dioxide, combined with the climbing oil price, drives the interest to more fuel efficient lean combustion engines for automotive applications. Such engines require new technical solutions for reduction of NOx in the exhaust gases, which are in excess oxygen, where a conventional three-way catalyst cannot be used to reduce NOx. LÄS MER