The origins of convolution and its further and rather complex historical development were dealt with in detail in a previous article. We saw there that it can be traced back to the middle of the 18th century; however, its modern form and use are not more than 50 or 60 years old.
A previous “Retrospectroscope” note dealt with spirometry: it described many apparatuses used to measure the volume of inhaled and exhaled air that results from breathing. Such machines, when adequately modified, are also able to measure the rate at which work is produced.
Scientists have recently reported the presence of water on Mars, renewing the hope that life exists on that planet and simultaneously offering a still-distant—but closer—dream for a place to be free (or perhaps freer?).
Introducing the Authors
When the stream is driven by a powerful pump, the running waters can take you to the unknowns of the mind.
—Max E. Valentinuzzi
Elisa Pérez was born in San Juan, Argentina, in 1978. She graduated as a bioengineer from the Universidad Nacional de San Juan
Signals from inside the body are the organ’s scriptures with messages telling what they do and how they feel
Teaching means to transmit a message to others and usually expects nothing in return. Many animal species teach their offspring how to hunt and protect themselves from predators, but this is not teaching in the human sense; it is instinct
The perception of music is a complex subject not yet fully understood that has led to a huge bibliography spreading from its physics foundations to mathematical descriptions, from a neurophysiologic basis to psychological aspects, but also setting its feet strongly on cultural facets
The main objective of this column is to historically connect the pressure–volume diagram (PVD) of the heat mechanical engines and that of the heart
Music, along with its attached rhythm, has been with man for centuries, developing and evolving along with him. Its influence on human behavior and mood can reach levels whose limits are still unknown, especially in everything related to perception, where the whole nervous system is involved
In the theory of relativity, time dilation is a difference of elapsed time between two events as measured by observers either moving relative to each other or differently situated from gravitational fields. It means that astronauts return from space having aged less