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Ahmed Sharkawy

on 26 November 2012

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Transcript of Asalieb

E-Magazine The Contents Literature What About >>>> The Golden Ratio Holly Mysteries
in The Holly Kaaba Presents ... small For More .. Watch 7 Minutes of Terror: Curiosity Rover's Risky Mars Landing | Video Creative Advertising A real problem ^_^ Space !! Creativity !! -_- Tip Who Moved My Cheese ?? This is a huge mountain If You Do Not Change, You Can
Become Extinct When You Move Beyond Your Fear, You Feel Free. ... small Please ... If U interested Search and read it ... It will Help U in Your Life (cc) photo by theaucitron on Flickr (cc) photo by theaucitron on Flickr Engineering Mechanics Architecture Computer Science Android It won't be overstatement if we describe Android™ as a breakthrough in the mobile software development , as an open source operating system based on the "popular with developers" linux OS "operating system", using Java for application development , it became familiar with developers as it facilitates work , giving tools for development. Well , shall we begin talking about the history of Android™ ? in 2003 , it was developed by Android inc. and funded by Google until being bought by them in 2005, in 2007 Google published Android SDK , and SDK stands for Software Development Kit , which gives developers platform for developing programs . With the publication of Android 1.0 , it produces many features of mobile software such as multitasking and Google maps , through the versions , many features were added until the current version Jelly bean 4.1. With its growth , it became the rival of Apple's IOS , now , Android™ has a 58% of the smart phones holders . We may notice that Android™ is preferable to users than IOS due to the availability of free apps , whereas IOS has lesser free apps and the ease of access to android market , and because the Android™ UI(User Interface) provides a lot of customization compared with Apple's .

Android™ may seem to have the upper hand in the previous point , however , IOS gives users a more stable updates at regular intervals unlike Android™ , that reflects that Google may be hesitant in such thing , if we compare the periods between every IOS version , we'll find that the updates are annually and reach almost every Iphone , no matter 3gs , 4 , 4s , on the other hand , the periods aren't regular , they can be a year , and several moths , and also they may come late to some phones , and may not come to others and apps may have incompatibility problems with certain phones , but that may be a double edged weapon , because the existence of many Android phones helps in the growth of it .

Finally , most of the points predict that it's only a matter of time for Android™ to have more share than 58% and overcome the IOS unless Apple does a breakthrough . Electricity Wait For Us In Faculty Of Engineering El Mansoura University With Our Printed Asalieb issue #4 Contact With Us On http://www.facebook.com/Asaleib Aeronautics What about Turbo engines !! Creating thrust takes energy. The energy required is obtained from burning fuels, whether it be in gas or liquid form such as propane, kerosine, diesel or even vegetable oils! This fuel is normally combined with pressurized air to increase the efficiency and power output for a given engine size. This fuel/air mixture is burned in some form of combustion chamber where the resulting hot gases expand creating an increase in pressure inside the combustion chamber. The expanding gases are then used to do useful work. One example of this process is what happens inside the cylinder of a car engine. Air and fuel are drawn into the cylinder by the downward movement of the piston, the piston then moves up and squeezes this mixture which is then ignited. The fuel burns creating a sudden sharp rise in pressure inside the cylinder. This pressure then forces the piston back down producing mechanical work. The piston then moves back up the cylinder to eject the burnt fuel ready for another cycle.

A jet engine works on the principle of Sir Isaac Newton's third law of physics, i.e. for every action there is an equal and opposite re-action. The action of forcing gases out from the rear of the jet engine results in a re-active force in the opposite direction, and is commonly referred to as 'thrust'. This thrust is measured in pounds force (lbf ), kilograms force (kgf ), or Newtons (N). Engines of this type are often referred to as 'Reaction Engines', a rocket engine being another example. Newton's third law and the action of a jet can be demonstrated in simple terms by inflating a balloon and releasing it, the escaping air propels the balloon in the opposite direction. Using a Turbocharger for a Jet Engine

A turbocharger is used on internal combustion engines to increase the amount of air and consequently the amount of fuel that can be introduced into the engines cylinders and as a result increases the amount of power that can be produced for a given engine size.

The turbocharger's compressor provides the pressurised air for the engines cylinders. The compressor wheel is driven by a turbine wheel via an interconnecting shaft. The turbine wheel is driven by the exhaust gases produced by the engine. The whole compressor/shaft/turbine rotating assembly is exactly the same setup as in a typical turbojet.

So, fortunately for us, a turbocharger already has two of the three major the elements that we need to build a turbojet, i.e. a compressor section and turbine section. The only difference between the turbocharger and a real commercial turbojet are the designs of the compressor and turbine wheels. In a commercial turbojet the wheels are designed to work 'axially' which means that the gases flow through the wheels along their axes of rotation. To knew More ... Visit
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