Two millennia of North Atlantic seasonality and implications for Norse colonies.

delta(18)O values of mollusks recovered from near-shore marine cores in northwest Iceland quantify significant variation in seasonal temperature over the period from approximately 360 B.C. to approximately A.

The formative years of nuclear medicine in Victoria.

Nuclear medicine is defined, and its development as a specialty in Victoria from the 1940s to the 1990s recorded, with the developing use of radioisotopes in investigations and treatment. The combined efforts of medical, scientific, and technical personnel is emphasised, together with the advances in instrumentation and radiopharmacy. The formation of the Australian and New Zealand Society for Nuclear Medicine is outlined, together with the training of medical and technical personnel, and some of the political issues in the establishment of the specialty.

Dual-task attention deficits in dysphoric mood.

The attentional functioning of nondysphoric, mildly dysphoric, and moderately to severely dysphoric college students was tested using the attentional blink (AB) paradigm. These groups performed equally well at reporting a single target appearing in a rapidly presented stream of stimuli. All groups showed an AB, with report sensitivity for a 2nd target being reduced when the 2 targets were presented less than 0.