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Sökning: LAR1:hb > Högskolan i Skövde > (2008)

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  • Hammarlund, Kina, et al. (författare)
  • In the heat of the night, it is difficult to get it right : teenagers' attitudes and values towards sexual risk-taking
  • 2008
  • Ingår i: International Journal of Qualitative Studies on Health and Well-being. - Routledge/Taylor&Francis. - 1748-2623. ; 3:2, s. 103-112
  • Tidskriftsartikel (refereegranskat)abstract
    • This study, using a hermeneutic approach, is based on data from four focus group interviews with 25 Swedish teenagers participating, ranging from 18-19 years of age. The aim is to gain a deeper understanding of teenagers' values and attitudes towards sexually transmitted infections (STIs) and sexual risk-taking. The teenagers seem to seek an excuse to fend off responsibility and deny their sexual risk-taking, an excuse provided by drunkenness. Under the influence of alcohol, teenagers are not too shy to have sex but remain embarrassed to talk about condom use. It seems as though the dialogue feels more intimate than the intercourse when it comes to protecting ones sexual health. To be able to act out in this sexual risk-taking the teenager often views the partner in a one-night-stand as an object, as opposed to a love relationship where they view their partner as subject, a person they care for. Engaging in sexual risk-taking often starts at a club where the teenagers go out to socialize and drink alcohol. They then play a game and a part of the game is to pretend that they do not play a game. In this game, certain rules are to be followed and the rules are set up by the girl, mainly to protect the romantic image of being carefully selected and thereby protected from being stigmatized as “sluts” or “whores”.
  • Johansson, Ulf, et al. (författare)
  • The Problem with Ranking Ensembles Based on Training or Validation Performance
  • 2008
  • Ingår i: Proceedings of the International Joint Conference on Neural Networks. - IEEE Press. - 978-1-4244-1821-3 ; s. 3221-3227
  • Konferensbidrag (refereegranskat)abstract
    •  The main purpose of this study was to determine whether it is possible to somehow use results on training or validation data to estimate ensemble performance on novel data. With the specific setup evaluated; i.e. using ensembles built from a pool of independently trained neural networks and targeting diversity only implicitly, the answer is a resounding no. Experimentation, using 13 UCI datasets, shows that there is in general nothing to gain in performance on novel data by choosing an ensemble based on any of the training measures evaluated here. This is despite the fact that the measures evaluated include all the most frequently used; i.e. ensemble training and validation accuracy, base classifier training and validation accuracy, ensemble training and validation AUC and two diversity measures. The main reason is that all ensembles tend to have quite similar performance, unless we deliberately lower the accuracy of the base classifiers. The key consequence is, of course, that a data miner can do no better than picking an ensemble at random. In addition, the results indicate that it is futile to look for an algorithm aimed at optimizing ensemble performance by somehow selecting a subset of available base classifiers. 
  • Jäger, K, et al. (författare)
  • Logistics actors - Key issues for a service developer
  • 2008
  • Ingår i: Proceedings of the 18th International Conference on Flexible Automation and Intelligent Manufacturing. - Skövde, Sweden. - 978-633-2757-5 ; s. 1329-1336
  • Konferensbidrag (övrigt vetenskapligt)
  • König, Rikard, et al. (författare)
  • Using Genetic Programming to Increase Rule Quality
  • 2008
  • Ingår i: Proceedings of the Twenty-First International FLAIRS Conference (FLAIRS 2008). - AAAI Press. - 978-1-57735-365-2 ; s. 288-293
  • Konferensbidrag (refereegranskat)abstract
    • Rule extraction is a technique aimed at transforming highly accurate opaque models like neural networks into comprehensible models without losing accuracy. G-REX is a rule extraction technique based on Genetic Programming that previously has performed well in several studies. This study has two objectives, to evaluate two new fitness functions for G-REX and to show how G-REX can be used as a rule inducer. The fitness functions are designed to optimize two alternative quality measures, area under ROC curves and a new comprehensibility measure called brevity. Rules with good brevity classifies typical instances with few and simple tests and use complex conditions only for atypical examples. Experiments using thirteen publicly available data sets show that the two novel fitness functions succeeded in increasing brevity and area under the ROC curve without sacrificing accuracy. When compared to a standard decision tree algorithm, G-REX achieved slightly higher accuracy, but also added additional quality to the rules by increasing their AUC or brevity significantly.
  • Orlenius, Kennert (författare)
  • Tolerance of intolerance : values and virtues at stake in education
  • 2008
  • Ingår i: Journal of Moral Education. - Routledge. - 0305-7240. ; 37:4, s. 467-484
  • Tidskriftsartikel (refereegranskat)abstract
    • The article addresses the issue of the tolerance of intolerance in an educational context. It concerns a real case in a Swedish upper secondary school some years ago, when a student was suspended from school owing to his sympathies with Nazi ideas. One hundred and twenty student teachers’ responses to this decision were analysed in respect of the idea of toleration as a crucial value and tolerance as a virtue in a liberal democratic society. The main findings show that the suspended student is seen as a democratic risk factor by a majority of the student teachers. On the other hand, those who disagree, maintain that the school’s handling of the situation and the attitude towards Sven, the suspended student, could be a democratic risk factor. The findings are discussed in the light of different views of democracy and humans rights, and of ‘the ethos of the teacher’. The article considers the idea of zero tolerance and maintains that the findings are in line with the related tendency to consider youth as a risk, instead of being at risk.
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