The ability to maintain appropriate gaps to objects in one's environment is important when navigating through a three-dimensional world. Previous research has shown that the visual angle subtended by a lead/approaching object and its rate of change are important variables for timing interceptions, collision avoidance, continuous regulation of braking, and manual control of headway. However, inv...

The human operator's performance in a high order, multiloop task, typified by the helicopter, is studied using the method of average responses. This method permits a time domain, transient input analysis. A cascade model configuration for the human operator is proposed. In this configuration, the first human operator model controls attitude. This model is identical to that of the single-loop mo...

purpose: to present a case of traumatic bilateral eyelid lymphedema. case report: an 18-year old male presented with severe bilateral eye lid lymphedema with a history of severe craniofacial trauma three month ago and neurosurgical procedure. he had lost vision in his left eye because of sever globe injury. his lymphedema was attributed to wide surgical incision scar. the patient underwent manu...

Main results 20 participants did not complete the study. Intention-totreat analysis found that either self-help intervention increased response rate compared with control. However, results did not reach statistical significance, perhaps due to a lack of study power (response rate: 54% with cognitive behaviour manual; 50% with unguided self-help manual; 31% with control; p=0.10 for cognitive beh...