944 research outputs found
Numerische Mathematik / An analysis of the TDNNS method using natural norms
No full textThe tangential-displacement normal-normal-stress (TDNNS) method is a finite element method for mixed elasticity. As the name suggests, the tangential component of the displacement vector as well as the normal-normal component of the stress are the degrees of freedom of the finite elements. The TDNNS method was shown to converge of optimal order, and to be robust with respect to shear and volume locking. However, the method is slightly nonconforming, and an analysis with respect to the natural norms of the arising spaces was still missing. We present a sound mathematical theory of the infinite dimensional problem using the space H(curl) for the displacement. We define the space H––(divdiv) for the stresses and provide trace operators for the normal-normal stress. Moreover, the finite element problem is shown to be stable with respect to the H(curl) and a discrete H––(divdiv) norm. A-priori error estimates of optimal order with respect to these norms are obtained. Beside providing a new analysis for the elasticity equation, the numerical techniques developed in this paper are a foundation for more complex models from structural mechanics such as Reissner Mindlin plate equations, see Pechstein and Schöberl (Numerische Mathematik 137(3):713–740, 2017).Refereed/Peer-reviewedVersion of recor
Astrid Lindgren and the Archives
No full textThe author Astrid Lindgren (1907-2002) is for many Swedes a genuine national icon. On several occasions, when the most popular and influential Swede is to be announced, Astrid Lindgren’s name is always one of the top names. Astrid Lindgren is for the Swedes known not only as a famous author, but also as a person who spoke out on things she found wrong in the Swedish society. In the history of Swedish literature 1945 is usually regarded as a milestone and Astrid Lindgren’s book Pippi Longstocking was published and revolutionised both children’s literature and the attitude to children and their upbringing. Astrid Lindgren also worked as editor-in-chief for the publishing house Rabén & Sjögren from 1946 to 1970 and for almost a quarter of a century she was responsible for the children’s literature while at the same time she was in practise her own editor. Today, ten years after she passed away 94 years old, her remaining papers, letters and manuscripts are kept in different archives where interesting research can be carried out. There is a substantial amount of material from her rich and prolific life and in this article I wish to illustrate how this material can be used to provide a deeper knowledge of Astrid Lindgren as a person and as an editor.</p
Astrid Lindgren : Author and Publishing Editor
No full textI den tryckt boken felaktigt ISBN 978-91-89460-13-3 (print), 978-91-89460-14-0 (pdf)</p
Three-field mixed finite element methods for nonlinear elasticity
No full textIn this paper, we extend the tangential-displacement normal-normal-stress continuous (TDNNS) method from Pechstein and Schöberl (2011) to nonlinear elasticity. By means of the Hu-Washizu principle, the distributional derivatives of the displacement vector are lifted to a regular strain tensor. We introduce three different methods, where either the deformation gradient, the Cauchy-Green strain tensor, or both of them are used as independent variables. Within the linear sub-problems, all stress and strain variables can be locally eliminated leading to an equation system in displacement variables, only. The good performance and accuracy of the presented methods are demonstrated by means of several numerical examples
Astrid Lindgren : Author and Publishing Editor
No full textI den tryckt boken felaktigt ISBN 978-91-89460-13-3 (print), 978-91-89460-14-0 (pdf)</p
Astrid Lindgren : Author and Publishing Editor
No full textI den tryckt boken felaktigt ISBN 978-91-89460-13-3 (print), 978-91-89460-14-0 (pdf)</p
Business Model Innovation and the Impact of Globalization
No full textAuthor Astrid LechnerMasterarbeit Universität Linz 201
Astrid Lindgrens tänder
No full textArtikeln visar hur författaren skapar komiska situationer kring tänder och tandvård. Artikeln behandlar också allmänt temat Att gå till tandläkaren inom barnlitteraturen.The article shows how the author creates comical situations around teeth and dental care. The article also generally deals with the theme Going to the dentist, in children's literature.</p
Astrid Lindgren oggi. Spunti per una riflessione
No full textThe Author does a study in deep about the charming work of Astrid Lindgren. Her books rapresent a widening of social childhood, and we can find some marks of fantastic mind and unconventional behaviour in them. The Author underlines the actuality of Lindgren’s literature
Frozen swamp to socio-political hot air : Astrid Väring - conservative author on the Swedish welfare state
No full textThe dissertation takes as its starting-point the dichotomies between origin and modernity, periphery and centre. This is particularly the case in Astrid Väring’s novels Frosten (1926) and Vintermyren (1927), in which the author pays tribute to the homestead and the rural community in contrast to the industrial community, whilst her novels also express an ambivalent attitude towards modernity. Astrid Väring bases her works on a Norrland literary tradition, which often stood in opposition to the central power despite being dependent on it. In this respect, a similarity with postcolonialism is evident. Access to a wealth of archive material, which has not previously been used in literary scholastic research, has resulted in a natural combination of a biographical method and socio-literary reading. When analysing the novels, the same external circumstances that had signifi cance for the author when the work was drafted, for example economic, social and political conditions, have therefore been taken into account. With reference to the novel Katinka (1942), the view of popular literature during the 1940s is dealt with. The pejorative view, prevalent in those days, is compared with a contemporary understanding of it. Today, neither the canon nor popular literature stand out as particularly homogeneous categories. Katinka was written at the start of the Second World War. A comparison is made in the dissertation between Vilhelm Moberg’s Rid i natt! (Ride this Night) (1941) and Katinka in order to ascertain the novels’ attitude towards the offi cial Swedish position of neutrality. In Ride this Night rebellion against the enemy is encouraged, in Katinka a cautious, wait and see attitude is urged. I som här inträden… (1944) is a novel with a purpose. In this novel Astrid Väring directs a harsh attack against the mental health care at Swedish mental hospitals. The dissertation contains a genre discussion concerning the various genres related to the novel with a purpose, for example roman à thèse. It can be concluded that theoretical work concerning the novel with a purpose is rare. But, when the issue pursued in the novel is no longer relevant, the novel with a purpose is often destined to be forgotten. Furthermore, Astrid Väring had the bad luck of falling in the shadow of Sara Lidman’s modernistic West-Bothnian accounts of the 1950s, which contributed to the fact that her entire works quickly fell into oblivion. This dissertation is the fi rst scholastic work on Astrid Väring’s works.digitalisering@um
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