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Sökning: WFRF:(Warnecke A)

  • Resultat 1-10 av 19
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1.
  • Abdelmagid, Nada, et al. (författare)
  • The Governance of Childhood Vaccination Services in Crisis Settings : A Scoping Review
  • 2023
  • Ingår i: Vaccines. - : MDPI. - 2076-393X. ; 11:12
  • Tidskriftsartikel (refereegranskat)abstract
    • The persistence of inadequate vaccination in crisis-affected settings raises concerns about decision making regarding vaccine selection, timing, location, and recipients. This review aims to describe the key features of childhood vaccination intervention design and planning in crisis-affected settings and investigate how the governance of childhood vaccination is defined, understood, and practised. We performed a scoping review of 193 peer-reviewed articles and grey literature on vaccination governance and service design and planning. We focused on 41 crises between 2010 and 2021. Following screening and data extraction, our analysis involved descriptive statistics and applying the governance analysis framework to code text excerpts, employing deductive and inductive approaches. Most documents related to active outbreaks in conflict-affected settings and to the mass delivery of polio, cholera, and measles vaccines. Information on vaccination modalities, target populations, vaccine sources, and funding was limited. We found various interpretations of governance, often implying hierarchical authority and regulation. Analysis of governance arrangements suggests a multi-actor yet fragmented governance structure, with inequitable actor participation, ineffective actor collaboration, and a lack of a shared strategic vision due to competing priorities and accountabilities. Better documentation of vaccination efforts during emergencies, including vaccination decision making, governance, and planning, is needed. We recommend empirical research within decision-making spaces.
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2.
  • Parraga, Adriane, et al. (författare)
  • Non-rigid registration methods assessment of 3D CT images for head-neck radiotherapy
  • 2007
  • Ingår i: Medical Imaging 2007. - : SPIE - International Society for Optical Engineering. - 9780819466303 ; , s. 6512H1-6512H9
  • Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
    • Intensity Modulated Radiotherapy is a new technique enabling the sculpting of the 3D radiation dose. It enables to modulate the delivery of the dose inside the malignant areas and constrain the radiation plan for protecting important functional areas. It also raises the issues of adequacy and accuracy of the selection and delineation of the target volumes. The delineation in the patient image of the tumor volume is highly time-consuming and requires considerable expertise. In this paper we focus on atlas based automatic segmentation of head and neck patients and compare two non-rigid registration methods: B-Spline and Morphons. To assess the quality of each method, we took a set of four 3D CT patient's images previously segmented by a doctor with the organs at risk. After a preliminary affine registration, both non-rigid registration algorithms were applied to match the patient and atlas images. Each deformation field, resulted from the non-rigid deformation, was applied on the masks corresponding to segmented regions in the atlas. The atlas based segmentation masks were compared to manual segmentations performed by an expert. We conclude that Morphons has performed better for matching all structures being considered, improving in average 11% the segmentation.
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3.
  • Nazin, Alexander, et al. (författare)
  • Direct Weight Optimization in Nonlinear Function Estimation and System Identification
  • 2007
  • Ingår i: Proceedings of the 6th International Conference on System Identification and Control Problems (SICPRO '07). - Linköping : Linköping University Electronic Press.
  • Konferensbidrag (refereegranskat)abstract
    • The Direct Weight Optimization (DWO) approach to estimating a regression function and its application to nonlinear system identification has been proposed and developed during the last few years by the authors. Computationally, the approach is typically reduced to a quadratic or conic programming and can be effectively realized. The obtained estimates demonstrate optimality or sub-optimality in a minimax sense w.r.t. the mean-square error criterion under weak design conditions. Here we describe the main ideas of the approach and represent an overview of the obtained results.
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4.
  • Raag, Raimo, 1953- (författare)
  • Mis on riiklik vähemuskeel?
  • 2009
  • Ingår i: Eesti Päevaleht. - Stockholm : Eesti Päevaleht Förlag AB. ; :21, s. -5
  • Tidskriftsartikel (populärvet., debatt m.m.)
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  • Resultat 1-10 av 19
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