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89Thermionic Valves - Electron Tubes - Vacuum Tubes - Lest we forget
The 50 great years of thermionics were from 1920 to 1970. During this period, thermionic valves were at the heart of radio, and later, television production, transmission and reception, audio amplification and public address, radar and radio telescopy. Valves also made possible early tape recording and mainframe analogue and even digital computers.
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83Process Piping - Key Facts on Process Piping Design
Whenever I heard the word "piping" the images of arrays of pipes arranged in a haphazard manner appeared in my mind until I started working on my final year project, that was about piping. I came to know...
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83End Planned Obsolescence
One of the chief contributions to pollution is planned obsolescence that results from under engineering products and continual upgrades that make yesterday's products undesirable. New developments spur this process on, especially if it is profitable and fashionable. We need a rethink on a lot of what we do.
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81Famous Inventions Of The 20th Century
The 20th century was proved to be the century of some important inventions. These inventions including different electronic gadgets, tools, automobiles, etc, impressed the world all over, at the time they were made. But now they are an essential...
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74Semiconductor Plasma
The Use of Plasma to create microchips, what goes on in those chambers.
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72Computer Recycling in Poor Countries
According to EPA in 2007 only about 16% of electronics were recycled in the US. Of these 16 %, 50 to 80% are exported to poorer countries for recycling. In most of these countries the technology to...
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71Cold Cathode Compact Fluorescents, The Best Outdoor Lighting Solution
An artist's rendition of a cold cathode compact fluorescent light bulb mountain man, with beard. Listen with your eyes to the words writ here, for I shall tell you a tale of light bulbs that would aspire to be mountain men! The plight of compact...
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70Beginners Guide to a CRT TV
This hub is designed to give you a basic understanding to CRT televisions (Tube TVs). They were one of the most important inventions of the 20th century, with the CRT (cathode ray tube) television being the...
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71Detection of Radiation by Geiger-Muller & Scintillation Counter, Diffusion Cloud Chamber and Photographic Plate
Detection of radioactive radiations using Geiger-Muller counter, scintillation counter, diffusion cloud chamber and photographic plate.
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