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1Electromagnet — An electromagnet is a type of magnet in which the magnetic field is produced by the flow of electric current. The magnetic field disappears when the current is turned off. Electromagnets are widely used as components of other electrical devices,… …
2Rail profile — Rail from 1896 Cross sections of flat bottomed which can rest directly …
3Railway switching networks — General PurposeRailway centralization is designed for controlling all the switches and signals within a railway station or its area. Control of the system is exercised from a single point. Rail circuits work as sensors (monitoring the traffic on… …
4Life Sciences — ▪ 2009 Introduction Zoology In 2008 several zoological studies provided new insights into how species life history traits (such as the timing of reproduction or the length of life of adult individuals) are derived in part as responses to… …
5Via Net Loss — is a network architecture for telephone calls using circuit switching systems deployed in the 1950s with Direct Distance Dialing and used until the late 1980s. The purpose of the VNL plan and five level long distance switching hierarchy was to… …
6Brandon Mroz — Mroz at the 2009 Worlds Personal information Full name Brandon Mroz Country represented United States …
7semiconductor device — ▪ electronics Introduction electronic circuit component made from a material that is neither a good conductor nor a good insulator (hence semiconductor). Such devices have found wide applications because of their compactness, reliability,… …
8Slot car — A slot car (sometimes, slotcar) is a powered miniature auto or other vehicle which is guided by a groove or slot in the track on which it runs. [Hertz, L.H. The Complete Book of Model Raceways and Roadways , 1st Ed. 1965.] [Reed, R. Know About… …
9Stairlift — A stairlift is a mechanical device for lifting people and wheelchairs up and down stairs. For sufficiently wide stairs, a rail is mounted to the treads of the stairs. A chair or lifting platform is attached to the rail. A person on the chair or… …
10building construction — Techniques and industry involved in the assembly and erection of structures. Early humans built primarily for shelter, using simple methods. Building materials came from the land, and fabrication was dictated by the limits of the materials and… …
