ACCP: From zero to forty

From Hero to Zero

This article discusses the identity processes involved in the transition to retirement for emergency service workers, which includes police officers, fire fighters, and emergency medical personnel. The author conducted a study using the Enhanced Critical Incident Technique (ECIT) to determine what helped, hindered and might have helped emergency service workers in making decisions regarding ret...

Forty Years of Marconi Radar from 1946 to 1986

‘In some of my tests I have noticed the effects and deflection of these waves by metallic objects miles away. It seems to me that it should be possible to design apparatus by means of which a ship could radiate or project a divergent beam of these rays in any desired direction, which rays, if coming across a metallic object, such as another steamer or ship, would be reflected back to a receiver...

From the Tropics to the Poles in Forty Days

Field experiments show that the poleward velocity of high-altitude weather balloons may, on rare occasions, be much higher than the observed poleward winds, while their eastward velocity is much slower than the observed eastward winds. Considering a simple physical model of horizontal particle’s motion in the atmosphere, which includes a realistic model of the pressure field, it is shown that t...

From Zero (Knowledge) to Bulletproofs

The origins of AIDS: from patient zero to ground zero.

The HIV/AIDS pandemic has so far caused about 35 million deaths, while 34 million individuals currently live with HIV. 2 Even if this will have no impact on the course of the epidemic, understanding the factors that allowed the successful emergence of HIV-1 is important, first as a moral obligation towards the victims, but also to draw lessons that could ultimately help mankind avoid facing sim...