The experts «Kaspersky Lab» conducted an analysis of viral activity in February 2012. According to the company, mobile threats have reached a qualitatively new level.


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If we allow a current to flow through a coil of wire, it will generate a magnetic field. That magnetic field can be used to move nearby permanent magnets or ferrite metal components. We say that there is an induced magnetic field radiating from the coil of wire.

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As stated before, by graphing the current vs. time, we end up with a pattern known as a SINUSOIDAL WAVE, or SINE WAVE for short. We say that the sine wave has positive and negative peaks at 90o and 270o respectively.
A sine wave has several important characteristics.

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So far, we have discussed that Sine waves have FREQUENCY, WAVELENGTH, PERIOD, and AMPLITUDE.
They also have one more important characteristic: PHASE

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In a previous lesson, we covered the fact that two alternating currents can be either in phase, or out of phase with respect to each other. We also discussed the addition of two sine waves of differing phase by using VECTOR ADDITION. I am fairly certain that you were hoping you would never see this again. Sorry, but you were SO wrong. We are soon going to get into the practical applications of vector addition.

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… If the interviewee is a smartly turned out business person who expects to be interviewed by a professional looking researcher, make sure you try to fulfil those expectations with your appearance and behaviour…
A researcher has to establish rapport before a participant will share personal information. There are a number of ways to do this.

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The reason why more and more extensive application of LED light is inseparable from its own merits, as everybody know: energy saving, long lifespan, no radiation (green light) etc., the following are some issues that related with LED lighting:

1. DC power supply should be used.

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… However, there are other scanners that offer large LCD screens…
Shopping for slide scanners can be a very frustrating and confusing process. Unlike technologies such as an eBook reader device that have a limited amount of features, there are a seemingly limitless number of features to choose from with 35mm slide scanners.

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… Besides these core applications found in some form or other on all handheld computers, most handhelds also provide a fair number of games and interesting (or useful) applications…
The main purpose of a handheld computer is to help you organize your life. All handheld computers include applications that allow you to:

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… Therefore, you can use the internet to access websites or programs such as Skype without having to go through a firewall…
If you travel often or if you live in certain countries, you may run into the problem of not being able to access the internet or a VOIP service such as Skype. A number of countries either block internet connections or only go through a single carrier. For example, in Belize you can only connect to the internet through Belize Telecommunications.

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