Narrow Band and Wideband frequency modulation

Difference between wideband frequency modulation and narrowband frequency modulation.

WIDEBAND FM:
Parameters :
1. modulation index : Greater than 1
2. maximum deviation: 75 kHz
3. range of modulating frequency: 30 Hz to 15 kHz
4. maximum modulation index: 5 to 2500
5. bandwidth : large,about 15 times higher than BW of narrowband FM
6. applications : entertainment broadcasting
7. pre-emphasis and de-emphasis : is needed.

NARROWBAND FM:
parameters :
1.modulation index: less than or slightly greater than 1
2. maximum deviation: 5kHz
3. range of modulating frequency : 30 Hz to 3 kHz
4. maximum modulation index : slightly greater than 1
5. bandwidth : small.approximately same as that of AM
6. applications: FM mobile communication like police wireless,ambulance etc
7. pre-emphasis and de-emphasis : is needed. 

Tuples ( Latin Numerals )

Tuple#Names for tuples of specific length

The term originated as an abstraction of the sequence: single,  double, triple, quadruple, quintuple, sextuple, septuple, octuple, ..., n‑tuple, ..., where the prefixes are taken from the Latin names of the numerals. The unique 0‑tuple is called the null tuple. A  1‑tuple is called a singleton, a 2‑tuple is called an ordered pair and a  3‑tuple is a triple or triplet. n can be any non negative integer. For example, a complex number can be represented as a 2‑tuple, a quaternion can be represented as a 4‑tuple, an octonioncan be represented as an 8‑tuple and a sedenion can be represented as a 16‑tuple.
Although these uses treat ‑tuple as the suffix, the original suffix was ‑ple as in "triple" (three-fold) or "decuple" (ten‑fold). This originates from a medieval Latin suffix ‑plus(meaning "more") related to Greek ‑πλοῦς, which replaced the classical and late antique‑plex (meaning "folded"), as in "duplex".[3]

Names for tuples of specific lengths
1 single
2 double
3 triple/treble
4 quadruple
5 quintuple pentadruple
6 sextuple hexatruple
7 septuple
8 octuple
9 nonuple
10 decuple
11 undecuple hendecuple
12 duodecuple
13 tredecuple
100 centuple

Another article about this: tuple#see also

You can find the Latin numerals easily by a simple google search
Appendix:Latin cardinal numerals
A Brief Guide to Latin Numerals

World best engineering universities

The Subject Ranking 2014-15: Engineering & Technology are out now:

1. Massachusetts Institute of Technology

Fig: Massachusetts Institute of technology
 United States of America
http://web.mit.edu/

Explore:

http://web.mit.edu/

    2.    Stanford University

Fig: Stanford University
United States of America
http://www.stanford.edu/

Explore:

http://www.stanford.edu/

    

   3.    University of California, Berkeley

Fig: University Of California
United States of Americahttp://www.berkeley.edu/

Explore:

http://www.berkeley.edu/

   4. California Institute of Technology

California Institute of Technology
United States of America
http://www.caltech.edu/

Explore:

http://www.caltech.edu/

   5. Princeton University

Princetion University
United States of Americahttp://www.princeton.edu/main/

Explore:

http://www.princeton.edu/main/

Advanced manufacturing

Virtual reality

Virtual reality or virtual realities (VR)  is computer-simulated reality. IT replicates an environment, real or imagined, and simulates a user's physical presence and environment in a way that allows the user to interact with it. Virtual realities artificially create sensory experience, which can include sight, touch, hearing, and smell.

Short cut keys

Eurotunnel

Engineering has no end and this is can be proved through the example of this great tunnel this is starting from France and ending at England.

• It is inside in water . Isn't it amazing ? . Well i think it is
• It is 31 miles long 23 of which is inside sea  

  

  Euro Tunnel

Palm Islands

Here is a great illustration of Modern Engineering

• These islands are the worlds biggest artificial islands in Dubai , UAE.
•  There are 1500 villas in it and all are on the artificial beaches. 
• The islands are the Palm Jumeirah, the Palm Jebel Ali and the Palm Deira.

  

  Palm Island

Bailong Elevator( Hundred Dragons Elevator)

Have you ever seen such elevator before ?

• Highest and heaviest elevator in the world
• Takes two minutes to ride from base to top
• It can carry 50 people in one trip and 18000 daily

  

  Bailong Elevator(China)

Engineers can change the world with their exceptional skills