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Reservoir sedimentation is an increasing problem affecting the majority of reservoirs both in Switzerland and worldwide. As many dams are more than 50 years of age, this problem is becoming more and more serious nowadays. Res-ervoir sedimentation leads to various severe problems such as a decisive de-crease of the active reservoir volume leading to both loss of energy production and water available for water supply and irrigation. These problems will intensify in the near future, because sediment supply tends to increase due to climate change. Therefore, countermeasures have to be developed. They can be divided into the three main categories sediment yield reduction, sediment routing and sediment removal. This paper focuses on the sediment routing using sediment bypass tunnels. Sediment bypass tunnels are an effective means to decrease the reservoir sedimentation process. By routing the sediments around the reservoir into the tailwater, sediment accumulation is reduced significantly. However, the number of sediment bypass tunnels in the world is limited primarily due to high investment and maintenance costs. The main problem of all bypass tunnels is the invert abrasion due to high velocities in combination with high sediment transport. Three Swiss bypass tunnel examples suffering invert abrasion are presented in this paper. Furthermore, VAW started a research project to investigate the invert abrasion process by conducting hydraulic scale tests in the laboratory. The goal of this research project is to establish general design criteria for optimal flow con-ditions where both sediment depositions in the tunnel are avoided and the result-ing abrasion damages are kept at a minimum.
Parental cancer: factors associated with children's psychosocial adjustment - a systematic review
(2012)
OBJECTIVE Children of cancer patients have an increased risk of developing psychosocial problems. But not all children are alike vulnerable to this stressful event. Thus, knowledge of risk and protective factors is required to design specific diagnostic tools and interventions for this vulnerable population. This study aims to provide a review and methodological evaluation of current studies examining factors associated with children's psychosocial adjustment when a parent has cancer. METHODS Four databases were systematically searched for quantitative research articles examining associative factors of children's adjustment. Study characteristics were analyzed and methodological quality was assessed by two independent reviewers. RESULTS 28 studies examining associative factors in 2896 families were identified. The included studies used a broad range of instruments assessing children's adjustment. Most patients were female breast cancer patients with middle to high socio-economic status. The majority of included studies used correlational approaches and cross-sectional designs. None of the studies examined toddlers or assessed children's quality of life. Across studies with low to high quality, we found no evidence of illness-related factors, except worse disease status that was related to lower adjustment. Evidence from moderate to high quality studies suggest that better family functioning indicates better adjustment, whereas parent's depressive mood indicates worse adjustment of the children. Child-related factors were inconsistent. CONCLUSION Health professionals should pay attention to cancer patients' dependent children. In order to identify this at-risk population, parent's depressive mood and poor family functioning should be considered. Future studies should also assess children's quality of life and child-related factors.
UNLABELLED BACKGROUND Parental palliative disease is a family affair, however adolescent's well-being and coping are still rarely considered. The objectives of this paper were a) to identify differences in psychosocial adjustment and health-related quality of life (HRQoL) among adolescents and young adults with parents suffering from palliative cancer or cancers in other disease stages, b) to relate psychosocial adjustment and health-related quality of life to adolescent coping, and c) to explore significant mediator and predictor variables. METHODS Cross-sectional data were derived from a multi-site research study of families before child-centered counselling. N=86 adolescents and young adults were included, their mean age 13.78 years (sd 2.45), 56% being female. Performed analyses included ANCOVA, multiple linear regression, and mediation analysis. RESULTS Adolescents with parents suffering from palliative cancers reported significantly less total psychosocial problems, and better overall HRQoL. There were no significant group differences regarding coping frequency and efficacy. Our set of coping items significantly mediated the effect of parental disease stage on psychosocial problems and HRQoL. Further, parental disease status and general family functioning predicted psychosocial problems (R2adj =.390) and HRQoL (R2adj =.239) best. CONCLUSION The study indicates distress among adolescents throughout the entire parental disease process. Our analysis suggests that counselling services could offer supportive interventions which focus particularly on adolescent coping as well as family functioning.
Minor Children of Palliative Patients: A Systematic Review of Psychosocial Family Interventions
(2012)
This paper describes the data mining method of association analysis within the framework of Knowledge Discovery in Databases (KDD) with the aim to identify standard patterns of nursing care. The approach is application-oriented and used on nursing routine data of the method LEP nursing 2. The increasing use of information technology in hospitals, especially of nursing information systems, requires the storage of large data sets, which hitherto have not always been analyzed adequately. Three association analyses for the days of admission, surgery and discharge, have been performed. The results of almost 1.5 million generated association rules indicate that it is valid to apply association analysis to nursing routine data. All rules are semantically trivial, since they reflect existing knowledge from the domain of nursing. This may be due either to the method LEP Nursing 2, or to the nursing activities themselves. Nonetheless, association analysis may in future become a useful analytical tool on the basis of structured nursing routine data.
Construction of Productivity Models - A Tool-Supported Approach in the Area of Facility Management
(2012)