Tamilnadu Govt. Jobs 2018/ AAVIN Recruitment 2018 (Sr Factory Assistant Posts, Apply Online for 275 Posts)

Tamil Nadu Cooperative Milk Producers Federation Ltd. (Aavin) has released a notification for the recruitment of Senior Factory Assistants with total number of vacancies of 275 posts. Interested candidates may apply for the post online before 16 July 2018.

The details of this notification is given below-

Post Name- TN Cooperative Milk Producers Federation Ltd Sr Factory Asst Online Form 2018

Total no. of Vacancies- 275 Posts

Largest Deserts in the World

Here are the Largest Deserts in the world, their Area and Location and also some interesting facts about these great deserts.

1. Antarctica Desert

Antarctica is the largest desert in the world, which is located around the South Pole. The total area covered by the Antarctica desert is 5.5 million square miles !!! Antarctica is the coldest continent and has highest average elevation in comparison to any other continent on the earth.
The temperature of Antarctica in winters may fall to -89 degree Celsius. No permanent residents are found in Antarctica because of too low temperature, but temporary residents are present in small number.

2. Arctic Desert

With an area of about 5.5 million square miles, arctic desert is the second largest desert in the world. This desert comes under Canada, Denmark, Norway, Russia, Sweden and the USA. Winter temperature may fall to  -40 degree Celsius.

Top 10 Largest Airlines in the World (Top 10 Airlines in the World by Revenue and Brand value)

In this post we will see some interesting facts about world's largest airlines. We can define world's largest airlines in different ways like-
American Airlines Group- It is  is the largest airline in the world by revenue, profit, fleet size, and passengers carried.
Lufthansa Group- It is the largest airline in the world by number of employees that work here.
Delta Air Lines- Delta Air Lines is the biggest by assets value and market capitalization.
Turkish Airlines- This airline is the largest in the world by number of countries served.
FedEx Express- By freight tonne-kilometers, it is largest.

So lets get more information here about World's largest airlines-

Largest Airlines in the World by "Airline Companies Revenue"

American Airlines Group

Rank                        Country            Revenue (US$B) 

               1                       United States           41.0

Top 25 Amazing and Cool facts about United States of America (USA)

United States Facts

The official name of the USA is the United States of America. The USA is a country that is located in North America having a population of more than 325 million. United States is the third most populous country in the world behind India and China and also third largest by area. The area of the USA is nearly 3 million square miles. This country has a federal presidential constitutional Republic Government.
Washington DC is the capital of USA and the largest city of the United States is New York. The official currency of this country is the United States dollar.
Now let's look at some amazing facts about states of America-

25 Cool Facts about United states of America (USA)

Statue of Liberty ,New York City, United States of America (USA) 

#1. The Pentagon is the largest office building in the world.

Quadrature Phase Shift Keying Modulation (QPSK) Basics, Waveform and Benefits

What is Quadrature Phase Shift Keying (QPSK) Modulation

In the last posts we have discussed ASK, FSK and BPSK i.e. Amplitude Shift Keying, Frequency Shift Keying and Binary Phase Shift Keying. In this post, we are going to discuss Quadrature Phase Shift Keying (QPSK). It is also a kind of phase shift keying but it is different from the binary phase shift keying.

Watch the complete Video Here-

 

So here we will understand what we mean by QPSK and why it is called as Quadrature Phase Shift Keying? what is 'Quadrature' here? and what is 'binary' in binary phase shift keying. We will also see the waveform of QPSK in this post and how it is formed. Here you will also get an idea about the benefits of QPSK over other digital modulation techniques.


🌓READ THIS ALSO:-
#Digital Modulation Techniques (ASK, FSK, PSK, BPSK)/ Amplitude, Frequency and Phase Shift Keying

How QPSK is different from ASK, FSK and BPSK

Actually we have seen in other posts on ASK, FSK, and BPSK that in these digital modulation techniques, the carrier wave assumes one of two possible states (symbols). Actually each discrete state of the carrier is called as symbol.

Pulse Code Modulation (PCM) Vs Differential Pulse Code Modulation (DPCM)

Following are the differences between Pulse Code Modulation (PCM) and Differential Pulse Code Modulation (DPCM) based on the Following Parameters-

1. Number of Bits

PCM- It can use 4, 8 or 16 bits per sample
DPCM- Bits can be more than one but are less than PCM.

2. Transmission Bandwidth

PCM- Bandwidth required is very high as number of bits are high
DPCM- Bandwidth required is lower than PCM.

Digital Modulation Techniques (Coherent and NonCoherent Digital Modulation Techniques)

Coherent Vs Non Coherent Modulation (Introduction)

On the Basis of presence of Phase-Recovery circuit, we can classify digital modulation techniques into coherent or non coherent techniques.

Watch the Complete Video Here-

 

The job of the phase recovery circuit is to keep the oscillators supplying locally generated carrier wave at the receiver; in synchronizm to the oscillator supplying carrier wave at the transmitting end.
Actually, We use carrier waves at the transmitting and receiving ends both and for coherent detection these two Carriers should be in synchronism. Here synchronism means, synchronization in both frequency and phase.

Microwaves Properties and Advantages (Benefits)

In this post we will discuss what are microwaves, their properties and various advantages.

What are Microwaves ?

Actually microwaves are nothing but electromagnetic waves, and they are called as microwaves because the wavelength of microwaves is small i.e. Micro, that's why it is known as 'Microwaves'.
Now let's discuss the properties of microwaves-

Watch the Complete Video here-

Properties of Microwaves

1. High Bandwidths (BW) Availability in Microwaves

Microwaves have larger bandwidth (1 gigahertz to 1000 gigahertz) in comparison to the common bands like Medium Wave (MW), Short Wave (SW), and Ultra High Frequency waves (UHF). Therefore more information can be transmitted due to high bandwidth availability in microwave frequencies.

What are Microwaves and their Applications (Uses) in various fields

What are Microwaves (Introduction) 

Today we will understand what are different applications of microwaves, but before knowing applications of microwaves, I would like to tell you what are microwave? Microwaves are Electromagnetic Waves (EM) having frequencies in the range from 1 GHz to 1000 GHz.

Watch the Complete Video here-

 

To give you an idea, it is important to understand that signals from AM radio stations are at 1 MHZ,
And for FM radio stations at 100 MHZ.
Here we are dealing with 1 GHz to 1,000 GHz of range.
These are called as microwaves because the word micro comes from the word tiny (small).

Quadrature Amplitude Modulation (QAM)/ QAM Transmitter and QAM Receiver Block Diagram

In this post, we will discuss the Quadrature Amplitude Modulation (QAM). Here we will see, the basic concept of quadrature amplitude modulation and why it is known as quadrature amplitude modulation. The block diagram of QAM transmitter and receiver also has been explained here.

Watch the Complete Video Here-

 

Introduction of Quadrature Amplitude Modulation (QAM)

Quadrature Amplitude Modulation (QAM) can be used, either with analog signals or digital signals. If the message signal is analog in nature, then we use it with Amplitude Modulation (AM) but when the message signal is in digital form, then Amplitude Shift Keying (ASK) is used.

Single Mode Optical Fiber Advantages

In this post, we will see various advantages that are offered by the Single Mode Fibers (SMF). So let's discuss here these advantages one by one-

1- The single mode fibers provide the greatest transmission bandwidth in comparison to other kinds of optical fibers.

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#OPTICAL FIBERS IN COMMUNICATION: COVERS ALL IMPORTANT POINTS


2- The losses in case of single mode fibres are minimum, as we know that in all kinds of optical fibers, losses are nearly negligible due to Total Internal Reflection (TIR) phenomena. But these losses are further reduced in single mode fibers because of the presence of only one mode.

Watch the Complete Video Here

 

 3- Quality of transmission is superior in single mode fibers, because modal noise is absent in these fibers. As it is clear by the name itself that single mode fibers contain only one mode while multimode fibers contain multiple modes. Because of this single mode, in single mode fiber there is no interference due to other modes, therefore quality of transmission is better.