Search for dissertations about: "space-time clusters"

Showing result 1 - 5 of 6 swedish dissertations containing the words space-time clusters.

  2. 1. Clusters of urban crime and safety in transport nodes

    Author : Adriaan Cornelis Uittenbogaard; Vania Ceccato; Mats Wilhelmsson; Alex Hirschfield; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; safety; urban crime; space-time clusters; crime concentrations; GIS; environmental attributes; public transport; underground stations; transport nodes; crime prevention;

    Abstract : The objective of the thesis is to provide a better understanding of the safety conditions inurban environments, particularly related to those found in transport nodes, in this case,underground stations, and surrounding areas1. First, the study starts with an analysis of theoverall city, identifying concentrations of crime in the urban fabric and then focusing on thecriminogenic conditions at and around underground stations. READ MORE

  4. 2. Prognostic and epidemiological factors in childhood leukemia : studies of p53 and MDM2 expression and of space-time clustering

    Author : Britt Gustafsson; Karolinska Institutet; Karolinska Institutet; []
    Keywords : Childhood leukaemia; MDM2; p53; immunohistochemistry; non-Hodgkin s lymphomas; space-time clustering; viral hypothesis;

    Abstract : Although cure rates in acute childhood leukaemias have improved it remains a challenge to understand how molecular aberrations influence the prognosis of leukaemia and thus the choice of optimal therapy. Some studies have suggested that dysfunction of the tumour suppressor gene p53 or the oncogene MDM2 could indicate disease progression in children with leukaemia. READ MORE

  5. 3. On the Einstein-Vlasov system: Stationary Solutions and Small Data Solutions with Charged and Massless Particles

    Author : Maximilian Thaller; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Static Solutions; Vector Field Method; non-linear wave equation; massless Einstein-Vlasov system; General Relativity; Conformal Einstein Field Equations; Minkowski stability; Vlasov matter; symmetric hyperbolic system; Einstein-Vlasov-Maxwell system;

    Abstract : The Vlasov matter model describes an ensemble of collisionless particles moving through space-time. These particles interact via the gravitational field which they create collectively. In the framework of General Relativity this gravitational field is described by space-time curvature. READ MORE

  6. 4. Epidemiological studies including new methods for cluster analysis of acute childhood leukaemia and brain tumours in Sweden

    Author : Ulf Hjalmars; Karolinska Institutet; Karolinska Institutet; []
    Keywords : Epidemiology; childhood; leukaemia; brain tumours; geographical information systerns; cluster analysis; Scan statistic; Knox test; environmental factors;

    Abstract : Background: The aetiology in childhood cancer is essentially unknown. Epidemiological investigations as to whether the incidence rates have changed for paediatric cancers or whether clustering of cases occur may give clues to possible causal factors. READ MORE

  7. 5. Necrotizing enterocolitis - growth, bone health and intestinal microbiota during childhood

    Author : Amanda Magnusson; Göteborgs universitet; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; NEC; Prematur; Benhälsa; Tillväxt; Tarmflora;

    Abstract : Necrotizing enterocolitis (NEC) is a dreaded gastrointestinal disease primarily affecting infants born preterm. Despite extensive research, NEC is still one of the most devastating diseases in neonatal intensive care. READ MORE