The TTL output stage is a rather complicated pushâpull circuit known as a totem-pole output (the transistors, diode, and resistor in the right-most slice of this TTL logic gate circuit). It sinks currents better than it sources current.
The theory for spontaneous generation refers to the idea that life can produced from nonliving things. Lazzaro Spallanzani proposed in his experiement that air was necessary for spontaneous generation.
Bonfire of the Vanities. Origins and History of the Iniquitous Bonfire of the Vanities and the lasting consequences on Art History. Girolamo Savonarola was a Dominican Friar and a religious extremist. The ideas of asceticism and renunciation which at that time had only existed in narrow monastic circles were carried to the masses by Savonarola. The Auto da fe (bonfire) of vanities held at the annual Florence carnival of 1497, probably marks the height of his activities as agitator. Thirteen hundred children, marching from house to house, demanded and collected the luxuries of the world.