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11Apr2016
Desktop application in java for format conversion of all basic type of files.Posted by Prabhash
I am writing a desktop application in java which is for format conversion of all basic type of files. For e.g. word to pdf, pdf to word, png to jpeg, mp3 to wav etc. But there is no framework in java which is capable of doing these tasks. There exists some APIs for doing these tasks but many of them are not free or some are for web based applications. But I need an API which is written purely in java and is available freely and also can be used in desktop applications. I need an API in which i have to create the object of a class provided in API and then call methods of that class. So if you know about any API which is suitable for me, please help me.

11Apr2016
Thevenins Theorem applicated to humansPosted by Prabhash
In our community we are lucky to have senior engineers who nicely accept to send us articles about technical topics or their career story. Last day, Muhammad (20 years experience) did and we were surprised by the title of his article…

It strongly raised our interest and we're sure it will raise yours too! So what is the Thevenin's equivalent to humans? Let's Muhammad give us the answer right now:

Of course, my dear readers, you have studied, and even used, what is commonly (and incorrectly?) known as the Thevenin’s Theorem. One cannot become an electrical engineer, or even pass a Circuit Analysis course without having studied it. It is such a simple concept, and so beautiful that I cannot help writing about it knowing very well that a lot has already been written on it by people much more learned.

Unfortunately, most engineers never give it (the theorem) the honor it deserves. A theorem is honored not by speaking or writing about it, but by utilizing it. Having taught electrical engineering for many decades I admit most electrical engineers do not realize the full potential of the theorem.

Thevenin's Theorem Recap

The theorem was originally stated for purely resistive circuits as per need of that time (in the nineteenth century). In simple words it says that a complicated electrical circuit (or part of it) behind a pair of terminals (or port) can be replaced by an equivalent circuit consisting of only a resistor in series with a voltage source.

The equivalent source has voltage equal to the ‘open circuit’ or ‘no load’ voltage of the original circuit at the same terminals. The equivalent resistor is equal in magnitude to the effective resistance ‘seen’ behind the same terminals when all energy sources have been deactivated.

11Apr2016
Wireless Power Transfer: Working principle, Benefits, and ApplicationsPosted by Prabhash
First demonstrated by Nicholas Tesla in the 1890s, wireless power transfer is an innovative technology that has permeated major areas in the consumer and industrial electronic market.

The various forms of WPT include solar energy, microwaves, and magnetic energy. In this article, we will focus on wireless power transfer using magnetism and induction coils. The following offers an insight into the working principle, features, and applications.

Working principle

Wireless power transfer works on the inductive power transfer principle, as found in the conventional transformers. The only difference is that while in the transformer the two coils are in very close proximity and contain a ferrite material to increase the coupling, inductive chargers have an air gap between the two coils. The process follows the following procedure:

The mains voltage is converted into alternating current, preferably, high-frequency AC

This current (the high-frequency AC) is transferred to the coil via transmitter circuit. This AC induces a magnetic field in the transmitter coil.

The induced magnetic field generates a current in the adjacent receiver coil.

11Apr2016
Calculating Real GDP!!! Help Please. Posted by Sudhir
In 2005 a country's nominal GDP was R500 Billion and in 2006 it was R600 Billion. If the inflation rate was 17% in 2006, what is the approximate value of the country's real GDP in 2006 ( measured in 2005 prices)?

1- R 513 billion
2 -R 498 billion
3 -R 587 billion
4 -R 600 billion

11Apr2016
Technology Focus & New Emerging FieldsPosted by Sudhir
Forum to talk on the new applications of Mechanical Engineering. Share and discuss on the coming new technology.

Forum to talk on the new applications of Mechanical Engineering. Share and discuss on the coming new technology.

Forum to talk on the new applications of Mechanical Engineering. Share and discuss on the coming new technology.

Forum to talk on the new applications of Mechanical Engineering. Share and discuss on the coming new technology.