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Flamethrowing Tractor no Need of Chemicals to Gets Rid of Weeds
The wrecked Ethiopian plane: Boeing has stopped working all its 737 Max aircraft after finding new evidence
STARTING SYSTEM: COMPONENTS AND HOW IT WORKS
Build a powerful Electric Bicycle at home(BLDC 750W MOTOR)
How To Install 80cc 2-Stroke Bicycle Engine Kit FULL DVD 66cc 48cc 50cc
after a space flight The ball for the opening match of the 2018 World Cup returned to Earth on Sunday
more dangerous than nuclear weapons WARNING !!
PTC Creo Parametric in Action - PTC 3D CAD software used by BMW & big companies
Fabricating Sturdy Large-Scale Structures on Desktop 3D Printers.
Top 10 Most Powerful Waterfall in The World

Flamethrowing Tractor no Need of Chemicals to Gets Rid of Weeds



Organic farmers have found an effective solution to pesticides, thanks to “flame weeding,” which is exactly what it sounds and looks like (via Boing Boing). As seen in the video above, a regular farm tractor is equipped with a row of flamethrowers that… well, throw flames on the ground, to clear any unwanted hindrances to their growing crops.

To be clear, flame weeding isn’t just setting fire to a field of crops. In fact, it’s actually more scientific than it seems. The folks in Flame Engineering, a company that specializes in flame weeding equipment, explain that it’s more about destroying the plant structure in the weed leaves so they can no longer perform photosynthesis and grow:

“Flame weeding is what we like to call a ‘slow kill.’ Essentially, you are destroying the cell structure in the plant leaf. The weed will no longer put energy toward growth (photosynthesis) taking the kill though the root system. YES, flame weeding will kill the roots too! Even on big weeds (over 6″), you will see a stunting effect and even a kill within a few days, depending on how established the root system is and how long the plant was exposed to heat.”

Did you realize that agriculture could be so badass? Are there any other action movie-like aspects of organic farming that we should know about? Give us a shout down in the comments!

Featured: nerdist.com

The wrecked Ethiopian plane: Boeing has stopped working all its 737 Max aircraft after finding new evidence



Boeing has halted all flights of its 737 Max aircraft after investigators found new evidence at the crash site. Boeing said it had suspended all 371 aircraft. The US Civil Aviation Authority said new evidence and satellite information led to a temporary ban on flights. The US authorities have maintained the continuity of flights of the aircraft model 737 Max, although banned in many countries of the world. All passengers and crew of the Ethiopian plane that crashed on Sunday were killed. The Ethiopian Air Police said on Thursday, investigators had found the black box records of the plane and had been sent to the French capital, Paris, for analysis. “The Ethiopian delegation led by the Aircraft Accident Investigation Office carried the black box to Paris to analyze its data,” the company wrote on its Twitter account.


STARTING SYSTEM: COMPONENTS AND HOW IT WORKS

 



  The starter motor is an electric motor that rotates your engine in order to allow the spark and fuel injection systems to begin the engine’s operation under its own power. Typically, the starter is a large electric motor and stator coil mounted to the bottom (generally to one side) of the vehicle’s transmission bell housing where it connects to the engine itself. The starter has gears which mesh with a large flywheel gear on the back side of the engine, which turns the central crank shaft. Because this is a lot of physical weight and friction to overcome, starter motors are generally powerful, high-speed motors and use an ignition coil to ramp up their power before engaging.

Components of starting system

Battery
The automotive battery, also known as a lead-acid storage battery, is an electrochemical device that produces voltage and delivers current. In an automotive battery we can reverse the electrochemical action, thereby recharging the battery, which will then give us many years of service. The purpose of the battery is to supply current to the starter motor, provide current to the ignition system while cranking, to supply additional current when the demand is higher than the alternator can supply and to act as an electrical reservoir.

Ignition Switch
The ignition switch allows the driver to distribute electrical current to where it is needed. There are generally 5 key switch positions that are used:


Lock- All circuits are open ( no current supplied) and the steering wheel is in the lock position. In some cars, the transmission lever cannot be moved in this position. If the steering wheel is applying pressure to the locking mechanism, the key might be hard to turn. If you do experience this type of condition, try moving the steering wheel to remove the pressure as you turn the key.
Off- All circuits are open, but the steering wheel can be turned and the key cannot be extracted.
Run- All circuits, except the starter circuit, are closed (current is allowed to pass through). Current is supplied to all but the starter circuit.
Start- Power is supplied to the ignition circuit and the starter motor only. That is why the radio stops playing in the start position. This position of the ignition switch is spring loaded so that the starter is not engaged while the engine is running. This position is used momentarily, just to activate the starter.
Accessory- Power is supplied to all but the ignition and starter circuit. This allows you to play the radio, work the power windows, etc. while the engine is not running.

Most ignition switches are mounted on the steering column. Some switches are actually two separate parts;

The lock into which you insert the key. This component also contains the mechanism to lock the steering wheel and shifter.
The switch which contains the actual electrical circuits. It is usually mounted on top of the steering column just behind the dash and is connected to the lock by a linkage or rod.
Neutral Safety Switch

This switch opens (denies current to) the starter circuit when the transmission is in any gear but Neutral or Park on automatic transmissions. This switch is normally connected to the transmission linkage or directly on the transmission. Most cars utilize this same switch to apply current to the back up lights when the transmission is put in reverse. Standard transmission cars will connect this switch to the clutch pedal so that the starter will not engage unless the clutch pedal is depressed. If you find that you have to move the shifter away from park or neutral to get the car to start, it usually means that this switch needs adjustment. If your car has an automatic parking brake release, the neutral safety switch will control that function also.



Starter Relay
A relay is a device that allows a small amount of electrical current to control a large amount of current. An automobile starter uses a large amount of current (250+ amps) to start an engine. If we were to allow that much current to go through the ignition switch, we would not only need a very large switch, but all the wires would have to be the size of battery cables (not very practical). A starter relay is installed in series between the battery and the starter. Some cars use a starter solenoid to accomplish the same purpose of allowing a small amount of current from the ignition switch to control a high current flow from the battery to the starter. The starter solenoid in some cases also mechanically engages the starter gear with the engine.


Battery Cables
Battery cables are large diameter, multistranded wire which carry the high current (250+ amps) necessary to operate the starter motor. Some have a smaller wire soldered to the terminal which is used to either operate a smaller device or to provide an additional ground. When the smaller cable burns, this indicates a high resistance in the heavy cable. Care must be taken to keep the battery cable ends (terminals) clean and tight. Battery cables can be replaced with ones that are slightly larger but never smaller.


Starter Motor
The starter motor is a powerful electric motor, with a small gear (pinion) attached to the end. When activated, the gear is meshed with a larger gear (ring), which is attached to the engine. The starter motor then spins the engine over so that the piston can draw in a fuel/ air mixture, which is then ignited to start the engine. When the engine starts to spin faster than the starter, a device called an overrunning clutch (bendix drive) automatically disengages the starter gear from the engine gear.

Working principles.



To make an engine start it must be turned at some speed, so that it sucks fuel and air into the cylinders, and compresses it.

The powerful electric starter motor does the turning. Its shaft carries a small pinion (gear wheel) which engages with a large gear ring around the rim of the engine flywheel.

In a front-engine layout, the starter is mounted low down near the back of the engine.

The starter needs a heavy electric current, which it draws through thick wires from the battery. No ordinary hand-operated switch could switch it on: it needs a large switch to handle the high current.

The switch has to be turned on and off very quickly to avoid dangerous, damaging sparking. So a solenoid is used – an arrangement where a small switch turns on an electromagnet to complete the circuit.

The starter switch is usually worked by the ignition key. Turn the key beyond the ‘ignition on’ position to feed current to the solenoid.

The ignition switch has a return spring, so that as soon as you release the key it springs back and turns the starter switch off.

When the switch feeds current to the solenoid, the electromagnet attracts an iron rod.

The movement of the rod closes two heavy contacts, completing the circuit from the battery to the starter.

The rod also has a return spring -when the ignition switch stops feeding current to the solenoid, the contacts open and the starter motor stops.

The return springs are needed because the starter motor must not turn more than it has to in order to start the engine. The reason is partly that the starter uses a lot of electricity, which quickly runs down the battery.

Also, if the engine starts and the starter motor stays engaged, the engine will spin the starter so fast that it may be badly damaged.

The starter motor itself has a device, called a Bendix gear, which engages its pinion with the gear ring on the flywheel only while the starter is turning the engine. It disengages as soon as the engine picks up speed, and there are two ways by which it does so – the inertia system and the pre-engaged system.

The inertia starter relies on the inertia of the pinion – that is, its reluctance to begin to turn.

The pinion is not fixed rigidly to the motor shaft – it is threaded on to it, like a freely turning nut on a very coarse-thread bolt.

Imagine that you suddenly spin the bolt: the inertia of the nut keeps it from turning at once, so it shifts along the thread of the bolt.

When an inertia starter spins, the pinion moves along the thread of the motor shaft and engages with the flywheel gear ring.



It then reaches a stop at the end of the thread, begins to turn with the shaft and so turns the engine.

Once the engine starts, it spins the pinion faster than its own starter-motor shaft. The spinning action screws the pinion back down its thread and out of engagement.

The pinion returns so violently that there has to be a strong spring on the shaft to cushion its impact.

The violent engagement and disengagement of an inertia starter can cause heavy wear on the gear teeth. To overcome that problem the pre-engaged starter was introduced, which has a solenoid mounted on the motor.

There’s more to a car starter system: As well as switching on the motor, the solenoid also slides the pinion along the shaft to engage it.

The shaft has straight splines rather than a Bendix thread, so that the pinion always turns with it.

The pinion is brought into contact with the toothed ring on the flywheel by a sliding fork. The fork is moved by a solenoid, which has two sets of contacts that close one after the other.

The first contact supplies a low current to the motor so that it turns slowly – just far enough to let the pinion teeth engage. Then the second contacts close, feeding the motor a high current to turn the engine.

The starter motor is saved from over-speeding when the engine starts by means of a freewheel clutch, like the freewheel of a bicycle. The return spring of the solenoid withdraws the pinion from engagement.

Build a powerful Electric Bicycle at home(BLDC 750W MOTOR)

Build a powerful Electric Bicycle at home

How To Install 80cc 2-Stroke Bicycle Engine Kit FULL DVD 66cc 48cc 50cc

How To Install 80cc 2-Stroke Bicycle Engine Kit FULL DVD 66cc 48cc 50cc

after a space flight The ball for the opening match of the 2018 World Cup returned to Earth on Sunday


The ball for the opening match of the 2018 World Cup returned to Earth on Sunday after a space flight.

The ball was flown to the International Space Station in March and returned to Earth aboard the Soyuz 07 spacecraft.

Along with Russian astronaut Anton Shakapelerov, Scott Tengel and Japanese Norrisheji Kanai landed in Kazakhstan near the town of Gizkazagan.

The World Cup begins on June 14 at Moscow's Luzhniki Stadium, which will be the scene of the opening match between Russia and Saudi Arabia.

The 21 matches of the World Cup will be held on 12 venues in 11 Russian cities with 32 teams from 14 June to 15 July.


more dangerous than nuclear weapons WARNING !!

It’s hard to believe how far we’ve come. We launched just a few years ago with our surveillance drones, and in this short amount of time, we’ve retooled cutting-edge artificial intelligence and machine learning techniques, such as deep learning and convolution neural networks, into hardware systems that governments and peace-keeping agencies can use to keep their troops safe. No more sending our brave patriots home in coffins. Now the artificial intelligence does all of the work. Our autonomous weapons are small, fast, accurate, and unstoppable.


And they are just the beginning. Smart swarms. Adaptive adversarial learning. On-the-field robust target prioritization. AI-powered tactics and strategy a Go master would envy. This is the future of peacekeeping.

About the technology
Our Autonomous anti-Personnel Systems (APS) employ an array of cutting edge AI technology, including:
Obstacle avoidance: the neural network copied into every APS has been trained through the equivalent of millions of hours in varied simulated environments to avoid obstacles, even when they are in motion.
Stochastic movements: trained on thousands of movies of mosquitoes and other flying insects, our drones will defeat any attempt to anticipate their flight patterns.
Efficient munitions: using precise targeting, we are able to drive the size of a projectile and propellant to a bare minimum.
Facial recognition: it’s in your iPhone and it’s in APS, along with parallel networks to identify targets by gait, gender, uniform, even ethnicity.
Multiple self-location protocols: along with GPS, our APSs use a variety of proprietary technologies to locate themselves in space.
Incommunicado and EMP hardened: once an APS gets flying, there is no way to stop it electromagnetically by jamming, spoofing, zapping, or anything else.
Big data links: we’ve acquired and consolidated a host of data sets. Using our servers you can reliably tie individuals to their individual characteristics for later targeting. We’d tell you more, but as the joke goes, then we’d have to kill you. (And of course, since you’ve visited this site we know exactly who you are.) Again, just kidding!
The Stinger anti-Personnel System
The Stinger is our first mass-produced mini-weapon. It’s fully autonomous with wide-field cameras, tactical sensors, facial recognition, processors that can react 100 times faster than a human, and its stochastic motion is an anti-sniper feature. Inside it are three grams of shaped explosives that offer just enough power to penetrate the skull and kill the target with surgical precision.
All About Teamwork
Vanguard Delivery and Breaching System
Each delivery system can carry 18 Stingers. The delivery system arrives at a building or some other enclosed space (car, train, plane, you name it), releases its cargo, attaches to the barrier, and blows a hole in the wall or window. The Stingers can then enter the building and find their targets. These systems are virtually unstoppable. Target terrorist cells, infiltrate enemy compounds — the bad guys will not be able to defend against them.
Identify and Target Only the Bad Guys
The EyeFire Target Identification System
All of our systems can use facial recognition to identify a predetermined target, but what about threatening underground movements or secret terrorists cells? It’s not like there are public hashtags that terrorists use to identify themselves. The EyeFire Target Identification System isn’t just the little bot, but an entire big-data processing system that can scan billions of tweets, posts, pages, videos, and anything else you can find online to identify patterns indicative of terrorist activity. The system then crawls that data to identify IP addresses and GPS locations to identify the suspect posting the dangerous messages. It can also track down who the suspect is collaborating with. We’ll help you weed out the bad guys.
SoftTouch Bot
A new form of regime change. The world is full of deadly leaders who are harming their citizens and threatening global security. Until recently, it’s been hard to oust these bad actors: they’re hard to get to and even if someone can get close enough for the kill, an obvious murder can lead to greater unrest. But these little bots are about the size of a bee, they can fly anywhere, get inside any building, hide inside any vent, and strike while the target sleeps. The question literally becomes: what’s your poison? The bots can be filled with a lethal dose of the poison of your choice, and the mark left on the body will be barely noticeable, looking like nothing more than a bug bite.

PTC Creo Parametric in Action - PTC 3D CAD software used by BMW & big companies

PTC Creo Parametric is the standard in 3D CAD software. It provides the broadest range of powerful yet flexible 3D CAD capabilities to accelerate the design of parts and assemblies. By automating tasks such as creating engineering drawings, you're able to avoid errors and save significant time in the product development process. The software also lets you perform basic analysis, create renderings and animations, and optimize productivity across a full range of other mechanical design tasks, including a check for how well your design conforms to best practices. PTC Creo Parametric helps you design higher-quality products faster and allows you to communicate more efficiently with manufacturing, suppliers and your customers.


Fabricating Sturdy Large-Scale Structures on Desktop 3D Printers.

TrussFab: Fabricating Sturdy Large-Scale Structures on Desktop 3D Printers.

Top 10 Most Powerful Waterfall in The World

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