Virgin Group chairman, adventurer and billionaire Sir Richard Branson, after having set his sights on commercial space travel through his Virgin Galactic, is now targeting the oceans’ depths. Branson on April 5 showcased the ‘Necker Nymph’, a solo-piloted ‘flying’ mini-submarine in which he plans to explore depths to which no man has ever been before in all the five oceans
In renewable power generation the wind energy has been noted as the most rapidly growing technology; it attracts interest as one of the most cost-effective ways to generate electricity from renewable sources. Because of some challenges such as conventional energy sources consumption, pollution, global climate change and security of energy supply, significant efforts have been made to develop renewable energy
Today through Wind Volt-Amp-Reactive (“WindVAR”) electronics, voltage is controlled and regulated in real-time. Similar to conventional utility generator, WindVAR supplies reactive power to the grid at the time its needed. in a fraction of a second , regulating system voltage and stabilizing weak grids. With the ability to supply reactive power to the grid Wind VAR opens the door to
It is common practice to size the machine elements, so that the maximum design stress is below the UTS (Ultimate Tensile Stress) or yield stress by an appropriate factor – the Factor of Safety, based on UTS(Ultimate Tensile Stress) or Yield Strength. The factor of safety also known as Safety Factor, is used to provide a design margin over the
When an element is stretched in one direction, it tends to get thinner in the other two directions. Hence, the change in longitudinal and lateral strains are opposite in nature (generally). Poisson’s ratio ν, named after Simeon Poisson, is a measure of this tendency. It is defined as the ratio of the contraction strain normal to the applied load divided
Plastics are excellent materials with unique and very useful properties. You can produce just about anything you can imagine using plastics. Characteristics of Plastics History Of Plastics: 1. Before Plastics—Age of the Natural Resins Rubber—Tough elastic substance (light cream or dark amber colored) from the milky juice (sap) of rubber tree Ebonite—Hard black rubber; natural rubber + sulfur Gutta-Percha—Dark brown
