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Every antenna is at resonance according to length to which it is cut ! They are usually cutto resonate at a particular band of frequencies, ie, Vhf Television band etc.If no resonance then no signal is present and in such a case antenna is merely a randomchunk of metal.
The magnetic field that an antenna puts out will produce an electric current on any conductingsurface that it strikes, however if that surface has a characteristic length the induced current willbe much stronger on the object. For example, when a Citizens Band signal travels th ....etc

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I am new to html5. I was try to know the main and pro-grammatical differences between html4 and html5. And way we use htnl5 with css3. Any differences are there in using javascript in html4 and html5.
I got a chance on htnl5 by reference. I know html4 well. but given period for inter view was small. Please give support to me. ....etc

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Knock is the result of the rapid combustion of the end-gas ahead of the flame front which undergoes chemical reactions prior to normal combustion. This cause high frequency pressure oscillations inside the cylinder that produce the sharp metallic noise called knock.

Two theories have been postulated to explain the origin of knock :

1. The autoignition theory which states that when the air/fuel mixture in the end- gas region is compressed to sufficiently high pressure and temperature the fuel oxidation process - starting with the preflame chem ....etc

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Numerical control has caused a virtual revolution in the discrete metal parts manufacturing industry. The success of NC has led to number of extensions of Numeric Control concepts and technology. Four of the important developments are the following:

Direct numerical control (DNC).
Computer numerical control (CNC).
Adaptive Control.
Industrial robots.
Direct Numerical Control(DNC)
There are number of problems inherent in conventional machiningwhich are motivated machine tool builders to seek imprivements in the basic NC system. Among the diffi ....etc

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In any analysis of innovation, 802.11 is truly a prime number. This evolving standard, better known as Wi-Fi, is the it protocol that s won the same spectacular hype as (whisper it softly) the Internet itself. Oh, the good old days. I miss them.

But while Wi-Fi undeniably inspires that intoxicating blend of expectation and excitement that leads to entrepreneurial excess, it s also the kind of technological platform that invites the best ideas. Wi-Fi s combination of well-crafted technical standard and regulation-free deployment offers a ....etc

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An antenna is defined by Oxford Dictionary as ? a usually metallic device for radiating or receiving radio waves ?. The IEE Standard Definitions of terms for Antennas ( IEE Std 145-1973) defines the antenna or aerial as ? a means for radiating or receiving radio waves ?. In other words the antenna is the transitional structure between free-space and a guiding device. The guiding device or transmission line may take the form of a coaxial line or a hollow pipe (wave guide) and it is used to transport electromagnetic energy from the transmitting s ....etc

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difference between chopper fed drives and converter fed drives pdf

If the source of supply is d.c. (for example in a battery vehicle or a rapid transit system) a chopper-type converter is usually employed. The basic operation of a single-switch chopper was discussed in topic 2, where it was shown that the average output voltage could be varied by periodically switching the battery voltage on and of for varying intervals. The principal difference between the thyristor-controlled rectifier and the chopper is that in the former the motor current ....etc

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