The Development of Communication Technology Between 1940 - 1950

As we know the development of communication has been grown in the world, especially in the 1940 - 1950. Many communication tools that have been developed since the year 1940 to 1945 such as :

•  computers
•  radios
•  handie-talkies 
  
•  television 

Now we will provide an explanation about Computer, Radio, Handie-talkie, Television:
1. Computer

In 1940, Atanasoff and Berry made ​​the first electronic computer. Until the year 1940 had a lot of discovery and development in the field of computer that is very helpful in various fields of activities.

The development of modern computer can be said to begin in the 1940s. After 1940, the development of a computer can be divided into five generations. The first generation of computers (1940-1959) using vacuum tubes to process and store data. The computer is not very ergonomic because it requires a lot of vacuum tube as well as a great power. Some examples of the first generation of computers, namely: Colassus, ENIAC, UNIVAC, EDVAC and EDSAC.

COMPUTER FIRST GENERATION (1940 - 1959)


* ENIAC (Electronic Numerical Integrator and Calculator)
In the year 1946 Dr. John Mauchly and Presper Eckert created with the name of the ENIAC computer, ENIAC consisted of 70,000 resistors, 5 million soldiers and 18,000 vacuum tubes, the computer has a very large size and power consumption of 160 000 Watt, the ENIAC computer era is versatile general purpose computer or a computer that can work 1000 times faster computers dibandingkand ith Mark I.

* EDVAC (Electronic Discrete Variable Automatic Computer)
Allowed all computer functions to be coordinated through a single source.
In 1945 Von Neumann designed the Electronic Discrete Variable Automatic Computer (EDVAC) with a memory that can be used to accommodate both programs and data. Using vakumpun tubes have been reduced in the EDVAC, and for the calculation process can be done faster than the ENIAC. By using this technique it is possible for the computer to stop at some point and then resumes. The main key is von architecture.
Neumann is the central processing unit (CPU), which allowed all computer functions to be coordinated from a single source.

* EDSAC (Electronic Delay Storage Automatic Calculator)
EDSAC Computer introduced the use of mercury (mercury) in the tube in order to save memory.

* UNIVAC I (Universal Automatic Calculator)
Dr. Mauchly and Eckert created the UNIVAC in 1951, this computer is a type of computer that can be used for commercial data processing and is the first commercial computer that uses the von Neumann architecture model. UNIVAC computer was once owned by the U.S. Census Bureau and General Electric. UNIVAC never produce something impressive is its success in predicting victory Dwilight D. Eisenhower in the presidential elections in 1952.

One of the characteristics of the first generation computers was operating instructions are made specifically for a particular task. In every computer there is a different program called "machine language" (machine language). This causes the computer is difficult to be programmed and the limitations on speed. One feature that really stands out from the first generation is the use of vacuum tubes are made in the form of computer is very large, but it also uses cylindrical magnetic data storage process.

2. Radio

Radio is a technology used to deliver the signal and modulation by electromagnetic radiation (electromagnetic waves). And propagate the wave passes through the air and can also propagate through the vacuum of space, because these waves do not require the carrier medium (such as air molecules).

The development of technology has now also has implications for radio broadcasts. Once we can only enjoy radio broadcasts with an AM (amplitude modulation). However, now the audience was spoiled by the emergence of FM radio waves (frequency modulation) to speak out more clearly. The person credited with finding the FM wave is Edwin Howard Armstrong, known as the "father of the inventor of FM radio"

3. Handie-Talkie

In 1940, Galvin Manufactory Corporation (now Motorola) to develop portable handie-talkie SCR536, which means a communication tool on the battlefield during World War II. This period is the next generation mobile phone 0 or 0-G, where mobile phones were introduced.

After removing the SCR536, then in 1943 Galvin Manufactory Corporation partable reissue the first two-way FM radio named SCR300 backpack model for the U.S. Army's equipment weighs about 35 pounds and can work effectively within the operating range of 10 to 20 miles.

 
Mobile phone system 0-G still use a VHF radio system to connect the phone directly to PSTN landline. The weakness of this system is the problem of congestion on the network which then led to attempts to change the system.

 
Generation 0 ended with the discovery of the modern concept by engineers from Bell Labs in 1947. They found the concept of using hexagonal phone as a basic cell phone. However, this new concept was developed in the 1960s.

 4. Television

·  1940 – Peter Goldmark menciptakan televisi warna dengan resolusi mencapai 343 garis.

·  1958 – Sebuah karya tulis ilmiah pertama tentang LCD sebagai tampilan dikemukakan Dr. Glenn Brown.


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