Monday, December 7, 2020
Monday, August 24, 2020
What is Marine Engineering?
Marine Engineering is a branch of engineering that deals with the construction and operation of the power plant and other mechanical equipment of seagoing craft, docks, and harbor installations. It includes the engineering of boats, ships, oil rigs, and any other marine vessel or structure, as well as oceanographic engineering or ocean engineering.
Marine engineering is the discipline of applying engineering sciences, including mechanical engineering, electrical engineering, electronic engineering, and computer science, to the development, design, operation, and maintenance of watercraft propulsion and onboard systems and oceanographic technology and the Marine engineers are skilled individuals who are involved in the design, construction, and maintenance of vehicles and structures used on or around water.
Careers in Marine Engineering
No environment on Earth is as demanding as the sea. Designing and building vessels and structures that can withstand the wind, waves and salt exposure requires special education and experience. The modern world’s global commerce is largely enabled by the ocean-going technological marvels created by Marine Engineers.
Marine engineers and naval architects design, build, and maintain ships, from aircraft carriers to submarines and from sailboats to tankers.
Marine Engineers are responsible for the design and construction of seagoing vessels and structures, focusing primarily on their internal systems. Simply put, they design the onboard electrical, environmental and propulsion systems aboard everything from oil platforms to cruise ships.
Why is the Salary so high in Marine Engineering?
Marine engineering curriculums are very similar to those in mechanical engineering. You will be trained to be a practical engineer and learn to work with the giant marine engines and auxiliary machines on board merchant vessels.
It’s a very technical job where you have to make time-sensitive decisions in order for the ship to run in good shape. Ship travel is enormously expensive, and mistakes can cost a shipping company millions. This is why, as an engineer, you will be paid such a large amount to maintain the ship’s machinery.
Monday, July 13, 2020
World's first underwater wi-fi setup.
World's First Underwater WiFi is Set Up
This is the first time anyone has used the internet underwater completely wirelessly thanks to LEDs and lasers.
By Chris Young
June 12, 2020
World's First Underwater WiFi is Set Up
Underwater WiFi that uses LEDs and lasersKAUST; Xavier Pita
You might think you've seen it all via live stream. Whether it's historic astronaut launches, the strawberry moon, or new videogame console reveals, it's easy to take our ability to see things unfold in real-time over the internet for granted.
And yet, there's one frontier we've yet to fully breached — the deep sea. Communication through water isn't quite as simple as through air and space.
Now, a new study shows that a type of aquatic internet can send data through light beams to allow divers to instantly stream footage from under the sea to the surface.
RELATED: HOW EXACTLY DOES WIFI WORK?
The problem with underwater communication
With our current technology, divers use hand signals, radio, or acoustic or digital light signals to communicate. While these allow fairly effective communication, they have their limitations.
Acoustic signals support long distances, but with a very limited data rate. Visible light can travel far and carry lots of data, the problem is that the narrow light beams require a clear line of sight between transmitters and receivers. Radio, meanwhile, can only carry data through short distances underwater. At the moment streaming video from under the sea simply isn't accessible.
That's a shame because video streaming provides a huge opportunity for scientific observation. "People from both academia and industry want to monitor and explore underwater environments in detail," lead author Basem Shihada explained in a press release.
Submerged Wifi
In order to help provide a solution, Shihada's team, from King Abdullah University of Science and Technology in Saudi Arabia, built an underwater wireless system that they've dubbed
Aqua-Fi supports internet services, such as multimedia message sending via either LEDs or lasers. The LEDs provide a low-energy short-distance communication option, while lasers need more power but can carry data further
World's First Underwater WiFi is Set Up
This is the first time anyone has used the internet underwater completely wirelessly thanks to LEDs and lasers.
By Chris Young
June 12, 2020
World's First Underwater WiFi is Set Up
Underwater WiFi that uses LEDs and lasersKAUST; Xavier Pita
You might think you've seen it all via live stream. Whether it's historic astronaut launches, the strawberry moon, or new videogame console reveals, it's easy to take our ability to see things unfold in real-time over the internet for granted.
And yet, there's one frontier we've yet to fully breached — the deep sea. Communication through water isn't quite as simple as through air and space.
Now, a new study shows that a type of aquatic internet can send data through light beams to allow divers to instantly stream footage from under the sea to the surface.
RELATED: HOW EXACTLY DOES WIFI WORK?
The problem with underwater communication
With our current technology, divers use hand signals, radio, or acoustic or digital light signals to communicate. While these allow fairly effective communication, they have their limitations.
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Acoustic signals support long distances, but with a very limited data rate. Visible light can travel far and carry lots of data, the problem is that the narrow light beams require a clear line of sight between transmitters and receivers. Radio, meanwhile, can only carry data through short distances underwater. At the moment streaming video from under the sea simply isn't accessible.
That's a shame because video streaming provides a huge opportunity for scientific observation. "People from both academia and industry want to monitor and explore underwater environments in detail," lead author Basem Shihada explained in a press release.
Submerged Wifi
In order to help provide a solution, Shihada's team, from King Abdullah University of Science and Technology in Saudi Arabia, built an underwater wireless system that they've dubbed Aqua-Fi.
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Aqua-Fi supports internet services, such as multimedia message sending via either LEDs or lasers. The LEDs provide a low-energy short-distance communication option, while lasers need more power but can carry data further.
The researchers built an Aqua-Fi prototype — detailed in their study published in IEE Explore — using green LEDs and a 520-nanometer laser. Both of these were used to send data from a small, simple computer to a light detector connected to another computer.
The first computer converted photos and videos into a series of 1s and 0s, which were then transferred via a light beam that turns on and off at very high speeds to transmit the signal. The light detector senses the variation in the light speed and translates it back into the computer language of 1s and 0s. This, in turn, is converted by the receiving computer into the streamed footage or other multimedia.
In the real world, Aqua-Fi would use radio waves to send data from a diver's smartphone to a "gateway" device attached to their gear. Much in the same way that a WiFi booster works, this gateway sends the data via a light beam to a computer at the surface that is connected to the internet via satellite.
World's First Underwater WiFi is Set Up
This is the first time anyone has used the internet underwater completely wirelessly thanks to LEDs and lasers.
By Chris Young
June 12, 2020
World's First Underwater WiFi is Set Up
Underwater WiFi that uses LEDs and lasersKAUST; Xavier Pita
You might think you've seen it all via live stream. Whether it's historic astronaut launches, the strawberry moon, or new videogame console reveals, it's easy to take our ability to see things unfold in real-time over the internet for granted.
And yet, there's one frontier we've yet to fully breached — the deep sea. Communication through water isn't quite as simple as through air and space.
Now, a new study shows that a type of aquatic internet can send data through light beams to allow divers to instantly stream footage from under the sea to the surface.
RELATED: HOW EXACTLY DOES WIFI WORK?
The problem with underwater communication
With our current technology, divers use hand signals, radio, or acoustic or digital light signals to communicate. While these allow fairly effective communication, they have their limitations.
Recommended videosPowered by AnyClip
What Is An IP, And Do You Really Need It?
Play Video
Acoustic signals support long distances, but with a very limited data rate. Visible light can travel far and carry lots of data, the problem is that the narrow light beams require a clear line of sight between transmitters and receivers. Radio, meanwhile, can only carry data through short distances underwater. At the moment streaming video from under the sea simply isn't accessible.
That's a shame because video streaming provides a huge opportunity for scientific observation. "People from both academia and industry want to monitor and explore underwater environments in detail," lead author Basem Shihada explained in a press release.
Submerged Wifi
In order to help provide a solution, Shihada's team, from King Abdullah University of Science and Technology in Saudi Arabia, built an underwater wireless system that they've dubbed Aqua-Fi.
More from Interesting Engineering
13 Facts About the Controversial Massive Chinese Dam That Slowed the Earth's Rotation
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This Video Explains the Reason Why Planes Avoid Flying Over the Pacific Ocean
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China's Advanced J-20 Stealth Fighter Jet Has Been Put Into Military Service
China's Advanced J-20 Stealth Fighter Jet Has Been Put Into Military Service
Aqua-Fi supports internet services, such as multimedia message sending via either LEDs or lasers. The LEDs provide a low-energy short-distance communication option, while lasers need more power but can carry data further.
The researchers built an Aqua-Fi prototype — detailed in their study published in IEE Explore — using green LEDs and a 520-nanometer laser. Both of these were used to send data from a small, simple computer to a light detector connected to another computer.
The first computer converted photos and videos into a series of 1s and 0s, which were then transferred via a light beam that turns on and off at very high speeds to transmit the signal. The light detector senses the variation in the light speed and translates it back into the computer language of 1s and 0s. This, in turn, is converted by the receiving computer into the streamed footage or other multimedia.
In the real world, Aqua-Fi would use radio waves to send data from a diver's smartphone to a "gateway" device attached to their gear. Much in the same way that a WiFi booster works, this gateway sends the data via a light beam to a computer at the surface that is connected to the internet via satellite.
Obstacles to overcome
During their tests, the team was able to record maximum data transfer speed of 2.11 megabytes per second and an average delay of 1.00 millisecond for a round trip. "This is the first time anyone has used the internet underwater completely wirelessly," says Shihada.
While that is impressive, there are several obstacles the researchers still need to overcome. "We hope to improve the link quality and the transmission range with faster electronic components," explains Shihada. What's more, the light beam has to remain perfectly aligned with the receiver in moving waters, so the team is considering a spherical receiver that can capture light from all angles.
"We have created a relatively cheap and flexible way to connect underwater environments to the global internet," says Shihada. "We hope that one day, Aqua-Fi will be as widely used underwater as WiFi is above water."
Seeing as underwater Wifi will have 5G to catch up with, that would be quite an achievement.
Top reference books of mechanical engineering.
We have compiled a list of Best Reference Books in Mechanical Engineering. These books are used by Mechanical Engineering students of Top Universities in the world such as MIT Massachusetts, UCB Berkeley, Carnegie Mellon, Harvard, Stanford, IITs (Indian Institutes of Technology), NITs, BITs and many other top institutes and colleges.
Here’s full list of all Mechanical Engineering subjects and one can visit any subject below to get Best reference books on that subject.
2. Fluid Mechanics &Fluid Machinery - by Cengel Climbala & D.s Kumar
3.Mechanics of solids(Material) - by Beer Johnston desilva
4. Heat & Mass Transfer - by Rc Sachdeva
5. Refrigeration And Conditioning (RAC) - by RK Rajpoot
6. Engineering Maths - by BS Grewal
7. Theory of Machines - by SS Rattan
8. Machine Design - by VB Bhandari
9. Engineering Mechanics - by AK Tayal
10. Manufacturing & Production - Amitabh Ghosh & KC Jain
11. IC Engine & Thermodynamics - Pk Nag
12. Operation Research - by D.S Hira & PK Gupta
13. Aptitude & Reasoning - by RS Agarwal
Sunday, July 5, 2020
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Saturday, April 4, 2020
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