Speed and accuracy of head- and eye-based aiming systems at high vertical acceleration.

Background: The benefits of using a head tracker in a fast jet to aim weapons and control sensor direction have been amply demonstrated, but head direction is difficult to control at high G. An experiment was conducted to assess whether aiming using the eye, rather than the head, might be advantageous.

Methods: A centrifuge provided sustained accelerations of up to 8 Gz.

The psychosocial assessment of patients discharged from accident and emergency departments after deliberate self-poisoning.

One-third of accident and emergency (A & E) patients who deliberately take an overdose are not admitted to hospital, and this proportion is increasing. We conducted an audit of 300 case records of such patients from two different district health authorities in London. We found that only 4% of patients were assessed in the manner recommended by the Department of Health and 10% had no psychosocial assessment whatsoever.