Thursday, September 10, 2020
Wednesday, September 9, 2020
Why it is called as the Internet of Things
1. What is Internet of Things : “Sensors and actuators embedded in physical objects are linked through wired and wireless networks”.
2. The term Internet of Things was invented in 1999, initially to promote RFID technology
3. M2M or the Industrial internet are not opposing concepts to the Internet of Things.The popularity of the term IoT did not accelerate until 2010/2011 and reached mass market in early 2014
Birth of Internet of Things
Kevin
Ashton, the Executive Director of Auto-ID Labs at MIT, was the first to
describe the Internet of Things, while making a presentation for Procter &
Gamble. During his 1999 speech, Mr. Ashton stated:
“Today
computers, and, therefore, the Internet, are almost wholly dependent on human
beings for information. Nearly all of the roughly 50 petabytes (a petabyte is
1,024 terabytes) of data available on the Internet were first captured and
created by human beings by typing, pressing a record button, taking a digital
picture or scanning a bar code. The problem is, people have limited time,
attention, and accuracy. All of which means they are not very good at capturing
data about things in the real world. If we had computers that knew everything
there was to know about things, using data they gathered without any help from
us, we would be able to track and count everything and greatly reduce waste,
loss and cost. We would know when things needed replacing, repairing or
recalling and whether they were fresh or past their best.”
Sunday, August 30, 2020
Assistant professor , Associate professor - ECE, Textile , Mathematics -Government Job
The Bihar Public Service Commission has invited applications for recruitment against 164 vacancies for the posts of professor, assistant professor, associate professor and HOD in Engineering and Polytechnic college. Further details visit http://bpsc.bih.nic.in/
Saturday, August 29, 2020
Friday, August 21, 2020
History of communication
|
Year |
Inventor |
Type of communication/Contribution |
|
1844 |
Samuel Morse |
Telegraph |
|
1864 |
James Clerk |
Electromagnetic wave |
|
1867 |
Hertz |
Experimental verification of EM |
|
1894 |
Oliver Lodge |
Demonstrated wireless communication in short distance |
|
1901 |
Guglielmo Marcon |
Long distance radio communication |
|
1918 |
Edwin H. Armstrong |
Super heterodyne receiver |
|
1933 |
Edwin H. Armstrong |
frequency modulation |
|
1857 |
Alexander Graham Bell |
Telephone |
|
1904 |
John Ambrose Fleming |
vacuum-tube diode |
|
1948 |
Walter H. Brattain, John Bardeen, and William Shockley |
Transistor |
|
1928 |
Philo T. Farnsworth |
Television |
|
1939 |
the British Broadcasting Corporation (BBC) |
broadcasting television on a commercial basis |
|
1928 |
Harry Nyquist |
Nyquiast cretriea for faith signal transmission |
|
1937 |
Alex Reeves |
pulse-code modulation |
|
1948 |
Claude Shannon |
A Mathematical Theory of Communication |
|
1955 |
John R. Pierce |
satellites for communications |
|
1966 |
K. C. Kao and G. A. Hockham |
Optical Communication |
History of Communication system
In the communication
fields, the history starts with the
Samuel Morse’s telegraph communication. It gave the revaluation in the
communication field. He transmitted the “What hath God wrought,” word in electric telegraph between
Washington, D.C., and Baltimore, Maryland, in 1844, a completely revolutionary
means of real-time, long-distance communications was triggered. It was
formulated by manual form in variable length code. Specifically, the Morse code
is a variable-length code using an alphabet of four symbols: a dot, a dash, a
letter space, and a word space; short sequences represent frequent letters,
whereas long sequences represent infrequent letters.
more about click the below link
Communication System - Introduction- look at communication in history
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