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geek learn

LOL. Another great “invention” debunked by Thunderf00t: Triton artificial gill

When you first see the movie you say that something like the triton artificial gill could be possible, but after you hear Thunderf00t explaining it, you know it’s bull. Such a small device cannot be a rebreather as it does not have the required volume and also cannot process the huge amounts of water in such a small space and with such a small battery.

Thunderf00t is an American researcher in Chechoslovakia, working at a nuclear plant, and he has already written a number of scientific papers, one of them being about the explosion of sodium in water.

He also debunked a number of other “inventions”, like the thorium car or solar freaking roadways, so stay close and listen to what he has so say.

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geek learn tech

AMD CPU Zen, CPU vs GPU, SD cards

In sweet preparation of my dream gaming pc I am looking left and right in order to see what are the best computer components to get into that gaming machine. Later in the summer I’ll have the new gaming rig at home and I’ll enjoy some fine gaming with the newest games from 2015 and on.

Until I’ll get all those coins in one place I’m spending my time playing games like Skyrim or watching the X Files, the old series. And also learn as much as I can about computer parts. And also blog from time to time about random stuff, like IT/tech and science.

Now, should we wait for the AMD Zen architecture from their CPU line? My thought on this: don’t wait. Buy something good enough now, wait for the Zen architecture to mature 1-2 years and then see if it is worth it to use it. For now Intel makes the best CPUs, but AMD makes the most affordable ones.

Good question: why do we need GPUs when we already have a central processing unit, the CPU? Well, the GPU is a special purpose CPU and this is why it is used to process graphics. The CPU is a general purpose processor which is able to handle any program, not just graphics.

And to finis, here is a short history lesson about the SD cards: quite small, they pack the storage punch really hard. Small and cute:

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geek learn science tech

Solar System in an amazing 360 video


The guys at Crash Course have created an amazing 360 video animation where we can learn more about our solar system. What’s a 360 degree video, you ask? It is a video in which you can rotate around and see other perspective while the video is still running.

If movies would have such a 360 degree video, then you may be able to see the cameras rolling while the actors do their thing. Just kidding. A great concept applied to a science video. Neat.

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geek learn science

What would happen if all the planets would align?


Nothing. Almost nothing. No earth quakes, no tidal waves. The influence of other planets on Earth would be so small that that they would be impossible to see. The Moon has more influence over our tidal waves than even the Sun.

Actually, the Moon has 3x more stronger tidal force than the Sun and tens of thousands of time than Jupiter or Saturn. Due to the high distance to the planets an alignment cannot influence anything on Earth. The last question in the video is quite interesting: what if you replace the Moon with Jupiter. Then the tidal forces would be so high on Earth that we would have volcanic activity and tidal waves like it crazy and it is doubtful we would have a nice life in here.

Mystery solved.

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geek learn science

Why does the Earth keep spinning?


The answer can be simple: because things in motion stay in motion. First law of motion from Newton. It is all about inertia: hen you set things in motion, if there are no forces acting upon an object, that object stays in motion.

Once an object is moving you do not need a force to keep that object moving. On Earth the friction with ground or air will stop the object from moving, but not in space. The same holds true for spinning objects. Get a spinner spinning and put it in a vacuum room and levitating using some magnets and you will see that spinner spinning for a long time.

Nick Lucid explains it more intelligently and with formulas too. What’s not to love when it comes to physics? Nothing.

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learn on the web

Watch bullets hit a metal wall at 1 million fps [video]


Werner Mehl from Kurzzeit has created a video in which you can see how bullets react when they hit a metal wall. The video is filmed at 1 million fps and you can see the myriad of ways a bullet can become dust in just a fraction of second.

Bullets are dangerous because they either hit a vital part of the body killing you instantly or they create a big hole in you or on the way out letting you die of blood loss. If a bullet does not hit bone and you are shot from close, then the hole it makes is smaller. Anyways, make sure to not get hit by a stray bullet.

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geek learn science tech

Can you see molecular bonds? IBM says yes.

IBM is mostly interested in finding new ways to build a processor or a storage medium instead just pure physics knowledge. They were able to image the bonds that can be seen in molecules and were also able to steal electrons from the molecule in order to change its type.

In the papaer publicshed in Nature Cemistry under DOI: 10.1038/NCHEM.2438 IBM researchers, in collaboration with CiQUS at the University of Santiago de Compostela, have observed the rearrangement reaction known as a Bergman cyclisation – which was first described in 1972 by American chemist Robert George Bergman.

The abstract says:

“Here we demonstrate a reversible Bergman cyclization for the first time. We induced the on-surface transformation of an individual aromatic diradical into a highly strained ten-membered diyne using atomic manipulation and verified the products by non-contact atomic force microscopy with atomic resolution.”

Which simply means that they were able to manipulate atoms in order to change the configuration of a molecule. Simply put, this is awesome. It is not the first time, but it has one of the simplest explanatory videos out there. Good on you, IBM.

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geek learn tech

Crazy machines: the Stirling Engine

What you see in the video from above is the Stirling Engine, a simple engine in which hot air moves a piston in ways you never knew possible. As you see, the piston is smaller than the cylinder it’s in. When the lower metal place is heated, the air that is at the bottom will heat up and then push the piston while going up.

Then the cool air from above the piston will be pushed down and heat up. The cycle begins again. While such an engine isn’t extremely practical, it serves quite well as an example of what engines are: devices that transform energy into mechanical work. That’s all there is to know about engines. Way for the Stirling Engine.

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geek learn science

Arabic numbers: why are they shaped like that?

cifre-indiene-unghiuri
In the image from above you can see why the numbers are looking the way they look now. We can say that we chose style over function, but you get the idea. Number one should have only one angle, number two should have two angles and number three should have four angles.

Today we do not use that exact notation, but at least we can understand now why the numbers are shaped like that. Clever guys those Indians and clever guys those Arabs who brought these numbers over to us. Roman numbers are awful to work with.
Image via.

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geek learn science

Medical Tuesday: probiotics, aspirin, and metal vs. bacteria


You guys know that I, the one man blogger-army on TGT, like to learn a lot of stuff. And stuff is enough on the web. Today we’ll learn a couple of things from the medical world namely, that probiotics are good only when you had issues with diarrhea after an antibacterial treatment, and that you should not put too much faith in them. Yup, they’re good, but not a panacea, a remedy for ALL diseases.

Aaron Carroll is not only the host and writer of the series called Healthcare Triage, but he is also a medic and a researchers. Mark his words, because he speaketh truth.

Now, let’g go to aspirin. It can help with blood circulation and, in some cases, it is recommended to eat one pill a day for a while, but this isn’t, also, a panacea. Learn more about aspirin from Dnews:

Because of MSRA, bacteria resistant to medicin, we need to find new ways to kill off bad bacteria. This is where metals like copper and silver and also nanoparticles can help us fend off these bacteria. A good thing to do is to NOT use antibiotics when you do not need them: