A cohort study of the mortality experience (1971-1987) of male Canadian prairie farmers has been conducted. This involved linking the records of 156,242 male Alberta, Saskatchewan and Manitoba farmers identified on the 1971 Census of Agriculture and the corresponding Census of Population to mortality records. Exposure indices for individual farm operators… (More)
BACKGROUND It has been hypothesized that the critical closing pressure of cerebral circulation, or zero-flow pressure (ZFP), can estimate intracranial pressure (ICP). One ZFP estimation method used extrapolation of arterial blood pressure as against blood-flow velocity. The aim of this study was to improve ICP predictions. METHODS Two revisions have been… (More)
OBJECTIVES Transcranial Doppler sonography allows for the estimation of blood flow velocity, whose maximum value, especially at systole, is often of clinical interest. Given that observed values of flow velocity are subject to noise, a useful notion of "maximum" requires a criterion for separating the signal from the noise. All commonly used criteria… (More)
1 ZFP hypothesis and intracranial pressure Background: It has been hypothesized that Critical Closing Pressure of cerebral circulation, or Zero
A 40 year old asthmatic presented with acute respiratory distress. Chest radiograph appeared to show loops of bowel within the thorax and a diagnosis of spontaneous/effort rupture of the diaphragm was made. Emergency laparotomy revealed an intact diaphragm and chest drain was inserted relieving a tension pneumothorax.
It is well-known that varying model parameters in a NWP model can affect multiple forecast parameters; but exactly how, is difficult to assess. The difficulty arises because of the nonlinearities and interactions inherent in the model. In other words, a change in a single model parameter can affect a number of forecast parameters, and the affect itself… (More)