Holography dates from 1947, when British/Hungarian scientist Dennis Gabor developed the theory of holography while working to improve the resolution of an electron microscope. Gabor, who characterized his work as "an experiment in serendipity" that was "begun too soon," coined the term hologram from the Greek words holos, meaning "whole," and gramma, meaning "message." (see Gabor's autobiography)
The National Plastics Center and Museum is a non-profit institution dedicated to preserving the past, addressing the present and promoting the future of plastics through public education and awareness. The educational staff has supported this mission throughout the years by conducting hands-on science programming for schools, organizations and the plastics community.
A new sitethat is dedicated to the memory of the many African-American inventors that have helped to develop this land of Diaspora that we have built.
This list is by no means the complete list of African-American inventors who have contributed to the successfully creation of this society. This hopefully will be become a community site that shall grow with the help of the electronic users.
Please submit all known inventors who were of African descent and is not currently not listed on this WebPage, to the Web D,signer.This request is made of all known inventors by any persons who want to help maintain the truth. This also is requested of all similar sites.
Everything's relative. Speed, mass, space and time are all subjective. Nor are age, motion or the wanderings of the planets measures that humans can agree on anymore; they can be judged only by the whim of the observer. Light has weight. Space has curves. And coiled within a pound of matter, any matter, is the explosive power of 14 million tons of TNT. We know all this, we are set adrift in this way at the end of the 20th century, because of Albert Einstein.
The popular magazine TIME put together this attractive site of the biographies and accomplishments of the most important scientists and inventors of the 20th Century to accompany TIME's Man of the Century site - that man being Albert Einstein. Essays on the Wright Brothers (aviation), Watson and Crick (genetics), Tim Berners-Lee (the World Wide Web) and many others in between are designed for a mainstream audience, though should prove useful as background information for scholars. The articles were written by established scholars (Peter Gay wrote about Sigmund Freud for instance while Donald Johanson wrote about the Leakey family). The site also includes photographs, audio-clips, and slide presentations.
From Benjamin Franklin's lightning rod to the Hubble Space Telescope, this timeline covers some of America's technological innovations and inventions.
Each month one or more issues is published in each of the topic areas you can see below. To have access to any one of these areas over the Web, as new issues are published, is only GBP2/US$3 per month, and double that to have unrestricted personal access to ALL areas. Please contact us at info@exnet.com for subscription information for individuals or groups (accredited educational institutions may be accepted free of charge).
The technology of modern remote sensing began with the invention of the camera more than 150 years ago. Although the first, rather primitive photographs were taken as "stills" on the ground, the idea and practice of looking down at the Earth's surface emerged in the 1840s when pictures were taken from cameras secured to tethered balloons for purposes of topographic mapping. Perhaps the most novel platform at the end of the last century is the famed pigeon fleet that operated as a novelty in Europe. By the first World War, cameras mounted on airplanes provided aerial views of fairly large surface areas that proved invaluable in military reconnaissance. From then until the early 1960s, the aerial photograph remained the single standard tool for depicting the surface from a vertical or oblique perspective.
Epact is an electronic catalogue of medieval and renaissance scientific instruments from four European museums: the Museum of the History of Science, Oxford, the Istituto e Museo di Storia della Scienza, Florence , the British Museum, London, and the Museum Boerhaave, Leiden. Together, these museums house the finest collections of early scientific instruments in the world.
Epact is an electronic catalogue of medieval and renaissance scientific instruments from four European museums: the Museum of the History of Science, Oxford, the Istituto e Museo di Storia della Scienza, Florence , the British Museum, London, and the Museum Boerhaave, Leiden. Epact consists of 520 catalogue entries and a variety of supporting material. All European instruments from the four museums by makers who were active before 1600 have been entered in the catalogue. They include astrolabes, armillary spheres, sundials, quadrants, nocturnals, compendia, surveying instruments, and so on. Examples range from ordinary instruments for everyday use to more extravagant and often lavish pieces destined for the cabinets of princes. Each instrument in the catalogue is described with the aid of one or more photographs and two levels of text: an overview text providing a short account of the most notable features of the instrument and a detailed text giving more technical and scholarly information.
Railway or American Morse was the first offically accepted Morse Code used in North America. In Canadian Railway Telegraph History, Railway or American Morse is clearly identified. However, in another chapter, reference is made in several places throughout the book, that many other forms of 'Morse' Code did develop.
