The probability model for periodic screening was extended to provide statistical inference for sensitivity depending on sojourn time, in which the sensitivity was modeled as a function of time spent in the preclinical state and the sojourn time. The likelihood function with the proposed sensitivity model was then evaluated with simulated data to check its reliability in terms of the mean estima...

OBJECTIVE To determine work activity patterns undertaken by ED consultants. METHODS A single observer time-motion study of consultants rostered to clinical shifts: primarily administrative (Duty) or clinical (Resuscitation). Direct observation of 130 h was undertaken using purpose developed time-stamping software. Primary outcome was task number and time spent in predetermined categories of a...

In this paper a model is deseloped that explains the allocation OF an individual’s tirnc among work and two types of leisure activities: time spent with spouse, and time spent with paramour. Data from two recent magazine surveys are available that can be used to test the predictions of the model regarding the detcrminanu of time spent with paramour. The results of estimating the equation explai...

In haplodiploid organisms, unmated or sperm depleted females are "constrained" to produce only male progeny. If such constrained females reproduce, the population sex ratio will shift toward males and unconstrained females will be selected to produce more females. Assuming that a female's own time spent constrained is an index of the population-wide level of constrained oviposition, and that co...