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  • Axelsson, Åsa, et al. (författare)
  • How bystanders perceive their cardiopulmonary resuscitation intervention : a qualitative study
  • 2000
  • Ingår i: Resuscitation. - Amsterdam : Elsevier. - 0300-9572 .- 1873-1570. ; 47:1, s. 71-81
  • Tidskriftsartikel (refereegranskat)abstract
    • <p>The importance of bystander cardiopulmonary resuscitation (CPR) prior to arrival of the emergency medical service is well documented. In Sweden, CPR is initiated prior to emergency medical services (EMS) arrival in about 30% of cardiac arrests out-of-hospital, a figure which should be improved urgently. To do so, it is of interest to know more about the bystanders' perceptions of their intervention. A qualitative method inspired by the phenomenographic approach was applied to 19 bystanders who had performed CPR. In the analysis, five main categories and 14 subcategories emerged. The main categories were: to have a sense of humanity, to have competence, to feel an obligation, to have courage and to feel exposed. Interviews described how humanity and concern for another human being were the foundation of their intervention. CPR training offers the possibility to give appropriate help in this emergency. If the aim of CPR training was extended beyond teaching the skill of CPR to include preparation of the rescuer for the intervention and his/her reactions, this might increase the number of people able to take action in the cardiac arrest situation.</p>
  • Bacauskiene, Marija, et al. (författare)
  • Selecting salient features for classification based on neural network committees
  • 2004
  • Ingår i: Pattern Recognition Letters. - Amsterdam : Elsevier Science. - 0167-8655 .- 1872-7344. ; 25:16, s. 1879-1891
  • Tidskriftsartikel (refereegranskat)abstract
    • <p>Aggregating outputs of multiple classifiers into a committee decision is one of the most important techniques for improving classification accuracy. The issue of selecting an optimal subset of relevant features plays also an important role in successful design of a pattern recognition system. In this paper, we present a neural network based approach for identifying salient features for classification in neural network committees. Feature selection is based on two criteria, namely the reaction of the cross-validation data set classification error due to the removal of the individual features and the diversity of neural networks comprising the committee. The algorithm developed removed a large number of features from the original data sets without reducing the classification accuracy of the committees. The accuracy of the committees utilizing the reduced feature sets was higher than those exploiting all the original features.</p>
  • Bacauskiene, Marija, et al. (författare)
  • The Evidence Theory Based Post-Processing of Colour Images
  • 2004
  • Ingår i: Informatica (Vilnius). - Vilnius : Institute of Mathematics and Cybernetics, Lithuanian Academy of Sciences. - 0868-4952 .- 1822-8844. ; 15:3, s. 315-328
  • Tidskriftsartikel (refereegranskat)abstract
    • <p>The problem of post-processing of a classified image is addressed from the point of view of the Dempster-Shafer theory of evidence. Each neighbour of a pixel being analyzed is considered as an item of evidence supporting particular hypotheses regarding the class label of that pixel. The strength of support is defined as a function of the degree of uncertainty in class label of the neighbour, and the distance between the neighbour and the pixel being considered. A post-processing window defines the neighbours. Basic belief masses are obtained for each of the neighbours and aggregated according to the rule of orthogonal sum. The final label of the pixel is chosen according to the maximum of the belief function.</p>
  • Baerveldt, Albert-Jan (författare)
  • A vision system for object verification and localization based on local features
  • 2001
  • Ingår i: Robotics and Autonomous Systems. - Amsterdam : Elsevier. - 0921-8890 .- 1872-793X. ; 34:2-3, s. 83-92
  • Tidskriftsartikel (refereegranskat)abstract
    • <p>An object verification and localization system should answer the question whether an expected object is present in an image or not, i.e. verification, and if present where it is located. Such a system would be very useful for mobile robots, e.g. for landmark recognition or for the fulfilment of certain tasks. In this paper, we present an object verification and localization system specially adapted to the needs of mobile robots. The object model is based on a collection of local features derived from a small neighbourhood around automatically detected interest points. The learned representation of the object is then matched with the image under consideration. The tests, based on 81 images, showed a very satisfying tolerance to scale changes of up to 50%, to viewpoint variations of 20, to occlusion of up to 80% and to major background changes as well as to local and global illumination changes. The tests also showed that the verification capabilities are very good and that similar objects did not trigger any false verification.</p>
  • Baerveldt, Albert-Jan, et al. (författare)
  • Editorial
  • 2003
  • Ingår i: Robotics and Autonomous Systems. - Amsterdam : Elsevier. - 0921-8890 .- 1872-793X. ; 44:1, s. 1
  • Tidskriftsartikel (populärvet., debatt m.m.)
  • Baerveldt, Albert-Jan (författare)
  • Guest editorial : Agricultural robotics
  • 2002
  • Ingår i: Autonomous Robots. - Berlin : Springer. - 0929-5593 .- 1573-7527. ; 13:1, s. 5-7
  • Tidskriftsartikel (refereegranskat)
  • Baerveldt, Albert-Jan, et al. (författare)
  • Vision-guided mobile robots for design competitions
  • 2003
  • Ingår i: IEEE robotics & automation magazine. - IEEE, The Institute of Electrical and Electronics Engineers. - 1070-9932 .- 1558-223X. ; 10:2, s. 38-44
  • Tidskriftsartikel (refereegranskat)abstract
    • <p>The use of popular and effective robot-design competitions in teaching system integration in engineering curricula was discussed. Such robot competitions give students open-ended problem spaces, teaches them to work in groups and stimulates creativity. The technical and pedagogical aspects of robot competitions along with their experiences and shortcomings were also discussed.</p>
  • Baigi, Amir, et al. (författare)
  • Cardiovascular mortality focusing on socio-economic influence : the low-risk population of Halland compared to the population of Sweden as a whole
  • 2002
  • Ingår i: Public Health. - Amsterdam : Elsevier. - 0033-3506 .- 1476-5616. ; 116:5, s. 285-288
  • Tidskriftsartikel (refereegranskat)abstract
    • <p>The aim of the study was to investigate the relationship between mortality from cardiovascular diseases (CVD) and socioeconomic status (SES) in Sweden and to estimate to what extent the difference between a province with low mortality and the rest of Sweden was dependent on socio-economic factors. A population-based retrospective study with a historical prospective approach was performed covering a 10-y period in the province of Halland, Sweden, as well as Sweden as a whole. Altogether 1654 744 men and 1592 467 women were included, of whom 45 394 men and 43 403 women were from Halland, distributed according to SES. Multivariate analysis with Poisson regression was used. Relative risks with 95% confidence intervals were calculated. Both men and women with a low SES showed a significantly higher risk of death from CVD in Sweden as a whole. The risk was 23% higher for male blue-collar workers and 44% higher for female blue-collar workers when compared to their white-collar counterparts. The level of mortality in Halland was 14% lower compared to the country as a whole when only age was taken into account. When the socio-economic variable was also included, this figure was 8%. The results show the substantial significance of social differences with respect to CVD mortality. The effect of SES seems to be more important than that of geographical conditions when the latter are isolated from socio-economic influence.</p>
  • Baigi, Amir, et al. (författare)
  • The association between socio-economic status and chest pain, focusing on self-rated health in a primary health care area of Sweden
  • 2001
  • Ingår i: European Journal of Public Health. - Oxford : Oxford University Press. - 1101-1262 .- 1464-360X. ; 11:4, s. 420-424
  • Tidskriftsartikel (refereegranskat)abstract
    • <p>Study objective: The study objective was to determine, first, the association between men's and women's chest pain and their socio-economic status (occupation, smoking) and, secondly, the association between their socio-economic status and self-rated health, in a primary health care area. Design and setting: A population-based cross-sectional survey was made in a primary health care area of Sweden. Primarily based on occupation according to Swedish standards, 4,238 men and women were divided into two socio-economic groups; blue-collar and white-collar workers. Methods: Odds ratios with 95% Cl were calculated by multivariate logistic regression, controlling for the variable age as confounding factor. Student's t-test was used to compare self-rated health, and the chi (2)-test to determine any difference in smoking habits between the two groups. Main results: Both male and female blue-collar workers showed significantly more chest pain when excited than white-collar workers. In six of eight health indices, they also reported significantly worse self-rated health than the white-collar workers. Conclusions: These findings show that there are socio-economic inequalities in self-reported chest pain. Furthermore, socio-economic status has a major influence on self-rated health, acting across the working life of both sexes.</p>
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