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Browsing Mathematics & Statistics by Author "IRCSET"

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Browsing Mathematics & Statistics by Author "IRCSET"

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  • Ryan, Niall C (University of Limerick, 2010)
    This thesis is concerned with the problem of high frequency elastic wave inversion. This is the problem of determining sharp, localised changes in the properties of materials beneath the surface of the earth using only ...
  • Burke, Kevin; MacKenzie, Gilbert (IWSM, 2013)
    The proportional hazards (PH) assumption in survival analysis may not always be appropriate. If data do not obey the assumption then we will reach incorrect conclusions by making it. For example we may find a covariate to ...
  • Burke, Kevin; MacKenzie, Gilbert (IWSM, 2012)
    It is well known that the proportional hazards (PH) assumption is a simplifying assumption in survival analysis that may not always be appropriate. However, PH models are routinely fitted and inference is made on the ...
  • Burke, Kevin; MacKenzie, Gilbert (IWSM, 2011)
    We aim to explore the survival distributions based on the extreme dispersion, XD, models proposed by Jørgensen (2010). It is suggested that survival times can be modelled within the XD framework by taking log T = Y ~ ...
  • Lynch, Joseph (University of Limerick, 2011)
    In the survival analysis literature, the standard model for data analysis is the semi-parametric Proportional Hazard (PH) model of Cox (1972). MacKenzie (1996) introduced the Generalised Time Dependent Logistic (GTDL) ...

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