Mary had a little lamb Little lamb, little lamb
Mary had a little lamb Its fleece was white as snow
And everywhere that Mary went Mary went, Mary went
Everywhere that Mary went The lamb was sure to go
He followed her to school one day School one day, school one day
He followed her to school one day Which was against the rule
It made the children laugh and play Laugh and play, laugh and play
It made the children laugh and play To see a lamb at school
So the teacher turned it out Turned it out, turned it out
And so the teacher turned it out But still he lingered near
And waited patiently about, Patiently about, patiently about,
And waited patiently about Till Mary did appear
"Why does the lamb love Mary so?" Love Mary so? Love Mary so?
"Why does the lamb love Mary so?" The eager children cry
"Why, Mary loves the lamb, you know." Loves the lamb, you know, loves the lamb, you know
"Why, Mary loves the lamb, you know." The teacher did reply
Mary had a little lamb Little lamb, little lamb
Mary had a little lamb Its fleece was white as snow
And everywhere that Mary went Mary went, Mary went
And everywhere that Mary went The lamb was sure to go
For more infomation >> Color Garbage Truck Cartoon | Video For Kids | Learn Street Vehicles | Superhero Fun Rhymes - Duration: 1:31:51.-------------------------------------------
Why Waiting for Perfect Autonomous Vehicles May Cost Lives - Duration: 2:50.
The main argument for mass deployment of autonomous vehicles is the number
of lives that could be saved. But how do you put a number
on that when the outcome is affected by so many variables?
Some say that AVs must be nearly perfect before we deploy because imperfect
technology would cost lives. Others point out that human drivers are far
from perfect. That over 30,000 people a year already die on America's roads,
almost all due to human error, so we should get AVs on the
road as soon as they drive better than we do.
So which plan is safer? To find out, we have to project future
road fatalities if AVs were never introduced. Next, we estimate how quickly
developers can improve AVs after they've been introduced and how quickly
conventional vehicles get replaced. Now, we can estimate the lives saved
under two scenarios: nearly perfect AVs and ones that are just better than
the average driver.
If nearly perfect AVs prevent 29,000 of 30,000 annual deaths, it's a
no-brainer to put them on the road. But when does that happen?
How long have you waited for them to be perfected?
And how many people have died in the meantime?
It turns out that introducing AVs when they are less than perfect,
when they're merely better than the average human driver, may actually save
more lives in the long run because we're introducing them sooner. We're
not waiting.
As a result, they get safer, faster. Once they're on the road,
developers would have more data to improve them than they do with their
small test fleets. The technology improves more rapidly, more people replace
their old cars sooner, and still more lives can be saved.
In fact, under every combination of future adoption and performance
conditions we examined, introducing AVs when they're less than perfect led
to fewer cumulative road fatalities over a 30 year period.
In some cases, saving hundreds of thousands of lives.
While postponing the introduction of AVs until they're nearly perfect might
seem safer in the short term, it could ultimately be the more dangerous choice.
But are we really ready to let go of the steering wheel?
We have to ask ourselves: What puts us at greater risk,
imperfect machines or imperfect human beings? And, if we don't want the
perfect to be the enemy of the good,
we must consider the critical factor of time.
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Kids Learn Fire Vehicles | Unboxing new cars for kids | Video about Emergency Vehicle - Duration: 16:51.
For more infomation >> Kids Learn Fire Vehicles | Unboxing new cars for kids | Video about Emergency Vehicle - Duration: 16:51. -------------------------------------------
Learn Fire Department Vehicles for kids | Emergency Vehicle For babies | Unboxing new cars - Duration: 7:16.
Learn Fire Department Vehicles for kids
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10 Amazing Vehicles of the Future - Duration: 10:18.
You may love your new car's heated seats and built-in ice dispenser, but there's
always room for improvement.
Whether it's alternative fuels, easier control or just general better design, the following
new and improved vehicles might hit the market in the near future.
10.
Air Powered Car
With the world's supply of petroleum running low, alternatives for fuel are hitting the
market.
Hybrids that run using batteries and plug-ins are getting popular, but prices can reach
hundreds of thousands of dollars.
That's one of the reasons Peugeot developed a new and cheaper hybrid car that can run
using petroleum and compressed air.
The car will automatically use air when driving under 69 kph and can use either air and petroleum
at faster speeds.
Using compressed air instead of batteries is a greener way of producing energy since
there are fewer toxic materials released.
It also allows more power to be released at once for quicker acceleration.
Unfortunately, a car won't run on air alone since energy will still be needed when compressing
it.
Add to that the dangers of using compressed air and this is still a work in progress.
9.
A Better Military Vehicle Researchers are always trying to strengthen
military vehicles.
In August 2014, DARPA announced its aim of not only making their vehicles tougher, but
reducing their size and weight and boosting their speed as well.
The program, known as Ground X-Vehicle Technology, wants to move away from the traditional vehicles
that are large and can easily be spotted by enemies.
The GVX-T will introduce new concepts such as a sensor that will help track allied and
opposing forces.
It will also be faster, need fewer people to operate it and will feature an autopilot
system in case the operator is busy with other tasks.
8.
Personal Choppers We're constantly wasting horsepower driving
at such slow speeds because of the ever growing problem of ground traffic.
So forget about saving for an expensive fancy car that will be just as stuck as you are
now, and hold out for the day when you can have your very own helicopter.
A European Union project called MyCopter aims to create a one-seater personal helicopter
that can be controlled as easily as your car.
It will fly low enough to not interfere with air traffic but high enough to not bother
ground traffic, and all without the need for a pilot license.
And forget about circling around roads and getting lost by taking the wrong off-ramp
when you can just fly your way straight directly between two places.
The initial phase of the project is almost complete, so hopefully we're not far off
from getting our own choppers.
7.
Self-Driving Car Because most road accidents are caused by
human errors — texting, drunk driving, just plain bad reflexes — we can't help but
feel that some people simply weren't meant to drive.
That's why we think Google's doing the right thing by presenting a car that can drive
on its own.
The car doesn't need the passenger to do anything at all besides start it and input
the target destination.
It doesn't even have a steering wheels or pedals, just an emergency break.
The car can detect its surroundings through a radar on top that has a range of 180 meters.
It also has a camera and laser sensor for a better scan of its surroundings.
It's excellent at avoiding accidents, although the current model only has a maximum speed
of 40 kph.
Aside from the obvious benefits to people with disabilities, the car also gives passengers
extra time to relax, work or eat breakfast instead of being stressed out by their morning
commute.
6.
Mind-Controlled Aircraft Not too fascinated with the self-driving car?
Want to do more than just press the start button?
Do you still want to have control over a vehicle, but are feeling too lazy to move your limbs?
How about using only your mind to control an aircraft?
A European Union-funded project known as BrainFlight allows an easier way of controlling an aircraft
by simply thinking of commands like left or right.
The project's test pilots wore a cap fitted with EEG electrodes that processes the brain's
electrical signals, which are in turn processed by a computer using algorithms.
Each algorithm processed corresponds to a command to control the aircraft.
EEG has been useful in allowing people to do simple tasks without lifting a muscle,
and researchers simply took it to a whole new level.
5.
Hoverbike
Hoverbikes are something you see a lot in science fiction.
Although this one doesn't exactly look like the bike used by the stormtroopers in Star
Wars, it basically works the same way.
And good news — you won't need a pilot license to fly this baby.
Aerofex plans to release the hoverbike in 2017 with flight tests starting in 2016.
It's going to weigh only 356 kgs, can carry up to two people at a maximum combined weight
of 140 kgs and can reach speeds of up to 72 kph.
Although that sounds slow, the real issue is to create a hoverbike that's safe to
use considering it can reach altitudes of up to 3.7m.
Hoverbikes do have their purpose aside from being cool ride — they can be used for search
and rescue operations to easily reach places not accessible by more traditional vehicles.
4.
Very Fast Levitating Train
Trains that levitate off the tracks have been around for a while, with the earliest high-speed
commercial train able to reach speeds of more than 400 kph.
But imagine a train that can reach up to 2900 kph.
That's about three times the speed of an average commercial plane, and could get you
from New York to Los Angeles in just under 90 minutes!
A new development in China called the Super Maglev could potentially reach such speeds.
Magnetic Levitation Trains, or MagLev for short, uses magnets to move instead of traditional
wheels.
This eliminates the friction between the wheels and the tracks, thus allowing faster speeds.
But as speed increases so does air resistance, and therefore more power is needed.
That's why the current fastest passenger MagLev train can only reach speeds of 431
kph.
The Super Maglev will use a tube to reduce these pressures and allow for much higher
speeds, although at this point it's all largely theoretical so don't book those
train tickets yet.
3.
Super Submarine
It seems China wants to turn every single vehicle into super fast ones that try to fight
the laws of physics.
China also has plans to create a supersonic submarine fast enough to complete a trans-Pacific
journey in about 100 minutes.
Submarines are currently the turtles among sea vessels, with the fastest one just reaching
80 kph.
Researchers are planning to use a process called "supercavitation," which involves
enveloping a submersible inside a bubble to reduce underwater drag that reduces speed.
This is also the process used in Russian torpedoes that can reach 386 kph.
A supercavitating submersible could theoretically reach speeds of up to 5800 kph, which is the
same as the speed of sound underwater.
There are still a lot of problems to work out, as a very powerful rocket engine will
be needed to give the submarine a long range.
Plus, high speeds will make it difficult to maintain the drag-reducing bubble.
2.
SR-72
The SR-71 Blackbird was an aircraft that could reach Mach 3 speeds.
It served mostly as a spy plane for the United States Air Force from 1964 until it was retired
in 1998.
It still holds the record as the fastest manned jet plane, but that might be broken soon.
Lockheed Martin, the creator of the Blackbird, has started a project to create its successor.
The new jet will be just about the same size of its predecessor but will be capable of
reaching Mach 6 speeds, a speed that only the X-15 was able to reach on a regular basis.
Like the SR-71, it will mainly be used for surveillance.
The SR-72 is expected to start flying by 2018 and become fully operational in 2030.
1.
Batmobile
Okay, it's not exactly Batman's amazing car, but this is the closest we could possibly
have in the next couple of years.
The GF7 jet car has an astonishing 3500 pound engine and can reach up to 160 kph on the
ground.
It can then open its seven meter folding wings and fly up to an altitude of 12,000 meters
with speeds of up to 885 kph.
When on the ground, the car will be powered by electric motors which are then recharged
by the jet engine during flight mode.
Like conventional aircraft, it will need a long runway of about 2500 meters to reach
the right speed for takeoff.
But a great car comes with a great price tag — the GF7 will cost three to five million
dollars and is expected to be available in about four years.
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