6 resultados para Negative stiffness structure, snap through, elastomers, hyperelastic model, root cause analysis

em Dalarna University College Electronic Archive


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Coetzee’s last novel Diary of a Bad Year (2007) has an intriguing triple-voiced narrative structure and deals with the grey area of shame. The narrative is divided between a writer, his written contribution to a book called “Strong Opinions”, and his secretary’s thoughts about both the opinions in the manuscript and her employer’s circumstances. This essay explores the relation between form and theme in Diary of a Bad Year; to see in what way these two fundamental elements of the novel intervene and support each other. By doing so the narrative structure is read through Freud’s structural model of personality, whereby each narrator’s voice is related to the notions of the super-ego, the ego and the id. In other words, this essay argues that the specific threefold narrative structure in Diary of a Bad Year, by reflecting the interrelated parts of human identity, helps in creating and developing the theme of shame, which only exists connected to the human psyche. This connection in turn gives special meaning to the entire narratology of the novel.

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It is an everyday experience to realize that things do not turn out the as expected. But what if you realize that everything you have so far experienced as reality is illusion? This article is about former members of the Jehovah’s Witnesses who have had doubts about what they previously believed to be the Truth. The article also treats the exit process, from being a Jehovah’s Witness to becoming an ex-Jehovah’s Witness. The data consists of twenty qualitative interviews with ten Jehovah’s Witnesses and twenty qualitative interviews with ten former Jehovah’s Witnesses. The data also include a diary written during four years preceding an exit from the organization. The analysis was made through thematic concentration. Ontologically the analysis and the article are based on a constructionist view though it is mainly empirical with no further theoretical assessment. However, to be able to understand the results a contextual frame is sketched with two factors affecting members who make an exit. First there are tying factors that bind the person closer to the organization; these are closeness and friendship and confirmation. A secluding factor is something that secludes the member from the outside society; these factors are the work situation and »closed doors«. With high values on these factors the exit process will be more arduous. The results are presented through a process model in which different phases or steps in the exit process are described. The following steps in the process are: (1) different levels of doubts; (2) trying out doubts; (3) turning points; (4) different decisions; (5) different steps in execution; (6) floating; (7) relative neutrality. The process is defined as an altogether ambivalent and emotionally tough experience, but other parts of life may be affected as well, such as employment, social life, family life and career.

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1. Genomewide association studies (GWAS) enable detailed dissections of the genetic basis for organisms' ability to adapt to a changing environment. In long-term studies of natural populations, individuals are often marked at one point in their life and then repeatedly recaptured. It is therefore essential that a method for GWAS includes the process of repeated sampling. In a GWAS, the effects of thousands of single-nucleotide polymorphisms (SNPs) need to be fitted and any model development is constrained by the computational requirements. A method is therefore required that can fit a highly hierarchical model and at the same time is computationally fast enough to be useful. 2. Our method fits fixed SNP effects in a linear mixed model that can include both random polygenic effects and permanent environmental effects. In this way, the model can correct for population structure and model repeated measures. The covariance structure of the linear mixed model is first estimated and subsequently used in a generalized least squares setting to fit the SNP effects. The method was evaluated in a simulation study based on observed genotypes from a long-term study of collared flycatchers in Sweden. 3. The method we present here was successful in estimating permanent environmental effects from simulated repeated measures data. Additionally, we found that especially for variable phenotypes having large variation between years, the repeated measurements model has a substantial increase in power compared to a model using average phenotypes as a response. 4. The method is available in the R package RepeatABEL. It increases the power in GWAS having repeated measures, especially for long-term studies of natural populations, and the R implementation is expected to facilitate modelling of longitudinal data for studies of both animal and human populations.

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This thesis contributes to the heuristic optimization of the p-median problem and Swedish population redistribution.   The p-median model is the most representative model in the location analysis. When facilities are located to a population geographically distributed in Q demand points, the p-median model systematically considers all the demand points such that each demand point will have an effect on the decision of the location. However, a series of questions arise. How do we measure the distances? Does the number of facilities to be located have a strong impact on the result? What scale of the network is suitable? How good is our solution? We have scrutinized a lot of issues like those. The reason why we are interested in those questions is that there are a lot of uncertainties in the solutions. We cannot guarantee our solution is good enough for making decisions. The technique of heuristic optimization is formulated in the thesis.   Swedish population redistribution is examined by a spatio-temporal covariance model. A descriptive analysis is not always enough to describe the moving effects from the neighbouring population. A correlation or a covariance analysis is more explicit to show the tendencies. Similarly, the optimization technique of the parameter estimation is required and is executed in the frame of statistical modeling. 

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This study covers a period when society changed from a pre-industrial agricultural society to a post-industrial service-producing society. Parallel with this social transformation, major population changes took place. In this study, we analyse how local population changes are affected by neighbouring populations. To do so we use the last 200 years of local population change that redistributed population in Sweden. We use literature to identify several different processes and spatial dependencies in the redistribution between a parish and its surrounding parishes. The analysis is based on a unique unchanged historical parish division, and we use an index of local spatial correlation to describe different kinds of spatial dependencies that have influenced the redistribution of the population. To control inherent time dependencies, we introduce a non-separable spatial temporal correlation model into the analysis of population redistribution. Hereby, several different spatial dependencies can be observed simultaneously over time. The main conclusions are that while local population changes have been highly dependent on the neighbouring populations in the 19th century, this spatial dependence have become insignificant already when two parishes is separated by 5 kilometres in the late 20th century. Another conclusion is that the time dependency in the population change is higher when the population redistribution is weak, as it currently is and as it was during the 19th century until the start of industrial revolution.

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The English language has become an international language and is globally used as a lingua franca. Therefore, there has been a shift in English-language education toward teaching English as an interna-tional language (EIL). Teaching from the EIL paradigm means that English is seen as an international language used in communication by people from different linguistic and cultural backgrounds. As the approach to English-language education changes from the traditional native-speaker, target country context, so does the role of culture within English-language teaching. The aim of this thesis is to in-vestigate and analyse cultural representations in two Swedish EFL textbooks used in upper-secondary school to see how they correspond with the EIL paradigm. This is done by focusing on the geograph-ical origin of the cultural content as well as looking at what kinds of culture are represented in the textbooks. A content analysis of the textbooks is conducted, using Kachru’s Concentric Circles of English as the model for the analysis of the geographical origin. Horibe’s model of the three different kinds of culture in EIL is the model used for coding the second part of the analysis. The results of the analysis show that culture of target countries and "Culture as social custom" dominate the cultural content of the textbook. Thus, although there are some indications that the EIL paradigm has influ-enced the textbooks, the traditional approach to culture in language teaching still prevails in the ana-lysed textbooks. Because of the relatively small sample included in the thesis, further studies need to be conducted in order to make conclusions regarding the Swedish context as a whole.