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11/05/2020

WHAT IS 5G?

5G is the 5th generation of mobile networks, a significant evolution of todays 4G LTE networks. 5G has been designed to meet the very large growth in data and connectivity of today’s modern society, the internet of things with billions of connected devices, and tomorrow’s innovations. 5G will initially operate in conjunction with existing 4G networks before evolving to fully standalone networks in subsequent releases and coverage expansions

In addition to delivering faster connections and greater capacity, a very important advantage of 5G is the fast response time referred to as latency.
Latency is the time taken for devices to respond to each other over the wireless network. 3G networks had a typical response time of 100 milliseconds, 4G is around 30 milliseconds and 5G will be as low as
1 millisecond. This is virtually instantaneous opening up a new world of connected applications.

11/05/2020

INTERNET HISTORY 1962 TO 1992
In the Beginning, ARPA created the ARPANET.

And the ARPANET was without form and void.

And darkness was upon the deep.

And the spirit of ARPA moved upon the face of the network and ARPA said, 'Let there be a protocol,' and there was a protocol. And ARPA saw that it was good.

And ARPA said, 'Let there be more protocols,' and it was so. And ARPA saw that it was good.

And ARPA said, 'Let there be more networks,' and it was so."
Danny Cohen

This Internet Timeline begins in 1962, before the word 'Internet' is invented. The world’s 10,000 computers are primitive, although they cost hundreds of thousands of dollars. They have only a few thousand words of magnetic core memory, and programming them is far from easy.

Domestically, data communication over the phone lines is an AT T monopoly. The 'Picturephone' of 1939, shown again at the New York World's Fair in 1964, is still AT&T’s answer to the future of worldwide communications.

But the four-year old Advanced Research Projects Agency (ARPA) of the U.S. Department of Defense, a future-oriented funder of ‘high-risk, high-gain’ research, lays the groundwork for what becomes the ARPANET and, much later, the Internet.

By 1992, when this timeline ends,

the Internet has one million hosts
the ARPANET has ceased to exist
computers are nine orders of magnitude faster
network bandwidth is twenty million times greater

11/05/2020

https://en.m.wikipedia.org/wiki/Hyperloop

A Hyperloop is a proposed mode of passenger and freight transportation, first used to describe an open-source vactrain design released by a joint team from Tesla and SpaceX.[1] Hyperloop is a sealed tube or system of tubes with low air pressure through which a pod may travel substantially free of ai...

11/05/2020

How Do All-Electric Cars Work?
All-electric vehicles (EVs) have an electric motor instead of an internal combustion engine. The vehicle uses a large traction battery pack to power the electric motor and must be plugged in to a charging station or wall outlet to charge. Because it runs on electricity, the vehicle emits no exhaust from a tailpipe and does not contain the typical liquid fuel components, such as a fuel pump, fuel line, or fuel tank. Learn more about electric vehicles.

All electric sedan image
High-res image
Key Components of an All-Electric Car
Battery (all-electric auxiliary): In an electric drive vehicle, the auxiliary battery provides electricity to power vehicle accessories.
Charge port: The charge port allows the vehicle to connect to an external power supply in order to charge the traction battery pack.
DC/DC converter: This device converts higher-voltage DC power from the traction battery pack to the lower-voltage DC power needed to run vehicle accessories and recharge the auxiliary battery.
Electric traction motor: Using power from the traction battery pack, this motor drives the vehicle's wheels. Some vehicles use motor generators that perform both the drive and regeneration functions.
Onboard charger: Takes the incoming AC electricity supplied via the charge port and converts it to DC power for charging the traction battery. It monitors battery characteristics such as voltage, current, temperature, and state of charge while charging the pack.
Power electronics controller: This unit manages the flow of electrical energy delivered by the traction battery, controlling the speed of the electric traction motor and the torque it produces.
Thermal system (cooling): This system maintains a proper operating temperature range of the engine, electric motor, power electronics, and other components.
Traction battery pack: Stores electricity for use by the electric traction motor.
Transmission (electric): The transmission transfers mechanical power from the electric traction motor to drive the wheels.

14/05/2019

Automatic transmission ,how it work

13/05/2019