2 resultados para Methodological problems

em Dalarna University College Electronic Archive


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Today around 28 000 women originally from countries where FGM is practised, are living in Sweden. Many of them are at childbearing age which means that knowledge about FGM and its consequences is of outmost importance during delivery. The aim of this study is to describe current research on how to manage the delivery, regarding deinfibulation and the following stitching as well as the risk of complications when the labouring woman is mutilated. This review of literature is based on 12 scientific articles published between years 1989 – 2005. Five different databases have been searched with use of a large number of keywords.The review found that no scientific research has been carried out that describes how deinfibulation and following stitching should be managed when the woman is mutilated. All available articles within this area are referring to best practice only. The review also found that the conclusions of the studies are contradictory. The majority, however, show an increased frequency for prolonged labour that could be related to FGM. The three largest studies also show an increased rate of caesarean section among mutilated women. In the few studies that examine haemorrhage, the majorities show an increased tendency to bleed, that could be related to FGM. Several articles emphasize the importance of good routines for deinfibulation to reduce the risk for complications.In summary it can be established that due to methodological problems in many studies, no reliable conclusion can be made that the researched complications exists to a greater extent when the woman is mutilated

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Combinatorial optimization problems, are one of the most important types of problems in operational research. Heuristic and metaheuristics algorithms are widely applied to find a good solution. However, a common problem is that these algorithms do not guarantee that the solution will coincide with the optimum and, hence, many solutions to real world OR-problems are afflicted with an uncertainty about the quality of the solution. The main aim of this thesis is to investigate the usability of statistical bounds to evaluate the quality of heuristic solutions applied to large combinatorial problems. The contributions of this thesis are both methodological and empirical. From a methodological point of view, the usefulness of statistical bounds on p-median problems is thoroughly investigated. The statistical bounds have good performance in providing informative quality assessment under appropriate parameter settings. Also, they outperform the commonly used Lagrangian bounds. It is demonstrated that the statistical bounds are shown to be comparable with the deterministic bounds in quadratic assignment problems. As to empirical research, environment pollution has become a worldwide problem, and transportation can cause a great amount of pollution. A new method for calculating and comparing the CO2-emissions of online and brick-and-mortar retailing is proposed. It leads to the conclusion that online retailing has significantly lesser CO2-emissions. Another problem is that the Swedish regional division is under revision and the border effect to public service accessibility is concerned of both residents and politicians. After analysis, it is shown that borders hinder the optimal location of public services and consequently the highest achievable economic and social utility may not be attained.