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/sci/ - Science, Technology, Engineering, and Mathematics

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PISA 2015 A SNEAK PREVIEW /sci/ Volume Anonymous 16/11/26(Sat)05:48 No. 16389 ID: 9ed66a [Reply]

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Here’s one update to discover on 6 December when latest results from PISA are made public


Anonymous 16/11/26(Sat)05:49 No. 16390 ID: 9ed66a

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Anonymous 16/11/26(Sat)05:50 No. 16391 ID: 9ed66a

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Anonymous 16/11/26(Sat)05:51 No. 16392 ID: 9ed66a

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warbeast Anonymous 16/11/12(Sat)04:38 No. 16377 ID: 779e7a [Reply]

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let's say i have the materials and technology needed to create a biomechanicaL warbeast based on a cicada. i want it to be able to blast out 194 Db waves of pure fuck-you-up. but also be able to use different frequencies and amplitudes of sound for different things too.

so, what's the best way to go about making it?
how would it work?

Anonymous 16/11/15(Tue)00:46 No. 16383 ID: 7f4ba3

who hurt you anon?

Reference books of basic Mathematica Daniel M 16/06/27(Mon)07:31 No. 16332 ID: 358ff9 [Reply]

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I want to learn mathematics. The next year I'll start a career of Pure Mathematics and I have a lot of years (5 aprox.) of neet. I'm looking for books to learn the topics about Mathematics in High School, alegbra and trigonometry, what else? If you can give me reference, please.

Anonymous 16/06/27(Mon)23:09 No. 16333 ID: e667c6

google NAVEDTRA books.

Anonymous 16/06/28(Tue)13:44 No. 16334 ID: 8be421

Any textbook will really work. Khan Academy is a good online source for getting ahead. Best of luck

Anonymous 16/10/14(Fri)12:54 No. 16366 ID: 1f1505

You will want Calculus, Linear Algebra, Differential Equations, Partial Differential Equations, Discreet Mathmatics, Complex Variables, Proofs, and Abstract Algerbra. There may be others but I can't think of them right now.

Anonymous 16/10/11(Tue)02:33 No. 16361 ID: 30b7a0 [Reply]

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Yooo, OnChip is maybe considering doing a crowdfunding thing for making a Devboard for a RISC-V MCU. Sounds kind of expensive at their estimate of 90 dollars a board, but I'm interested in RISC-V and if they do it I'mma get one. Curious if the chip will be packaged or if it's going to be wirebonded directly to the board like their current prototype board... https://twitter.com/onchipUIS/status/785328697133953024

Anonymous 16/07/18(Mon)19:24 No. 16345 ID: 7c58b3 [Reply]

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Does anyone else like programming, but hate the classes they have to take in Computer Science?

Anonymous 16/08/15(Mon)21:03 No. 16349 ID: 75c683

Fucking, yes, so boringggggggg.

Anonymous 16/09/03(Sat)09:49 No. 16359 ID: e3ecf4

My teacher is probably the best and most well liked in the school, so I love them.

Can someone please explain this "science matrix wtv" bullshit, t Anonymous 16/08/23(Tue)11:27 No. 16355 ID: eecf77 [Reply]

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microscopic telescope Anonymous 16/07/22(Fri)21:09 No. 16346 ID: f55268 [Reply]

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I just wondered, I have never heard of a microscopic telescope. By this I mean a device along the lines of a large nature-style camera lens or traditional telecope that is able to zoom in to the target area of a physical item and produce a 3d environment of that area through the lens? Surely theres an infinite amount of detail from a physical item We have all this advanced astronomical technology these days to look at things that lie in the distance. What would happen if technology was put into microscopic telecopes thanks everyone

TLDR: a lens of intricately layered magnifying glasses that self multiply

Anonymous 16/07/23(Sat)01:39 No. 16347 ID: 099ff6

>microscopic telescope
What do you mean? A telescope of microscopic proportions, or a telescope able to detect micro-scale features of objects at astronomical distances? Judging by the rest of your post, I'm going to assume the latter.

>produce a 3d environment of that area through the lens
What? What microscope or telescope is able to do this? All a scope does is take a cone of light and focus it to make it appear larger, and thus easier to see to human beings (obviously this doesn't apply to electron microscopes which work by entirely different principles).

>Surely theres an infinite amount of detail from a physical item
No. Photons are discrete particles. It's possible for an object to be so far away that even if we convert the entire surface of the Earth into a receiving device, not enough photons from the object will hit the Earth during its entire lifetime to get even sub-meter resolution. To get sub-meter resolutions within a human lifespan for relatively close objects (say, 1 light year) would require astronomically large objective lenses. Or, the detection device would have to move really fast around the target, which would increase the resolution only in the dimension of motion.
For example, the LIGO experiment, which is believed to have detected gravity waves from the black hole at the center of the galaxy, uses "lenses" (they're not actual lenses, but they're analogous) with a radius of 4 km.

Pirate Radio? Krang!HCYzxgP8mg 16/07/08(Fri)08:16 No. 16339 ID: 36b316 [Reply]

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If I wanted to build a radio transmitter (most likely over CBR since it's legal), what would be some tips? I've looked up some tutorials on this, but I want to know any stuff that I ought to look out for or any pitfalls that are easy to run into when building/transmitting. Looking mainly for technological tips here. I know a little about circuits (e.g. what capacitors and resistors are, how to use a soldering iron), but I want to know some basics: I'm looking to broadcast over a fairly small area (~10-25 mile radius).

I'd like to be able to play stuff from my computer as well. Anyone have tips on this? I assume you can just use the headphone jack as a line-out, but what sort of resources do I need on feeding a line-in to the transmitter?

Anonymous 16/07/06(Wed)06:42 No. 16337 ID: 0bf3b6 [Reply]

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"te he, we never said you couldn't fold the paper te he he :P "

well, guess what fuckers?

you also never said my three lines couldn't produce something else on the page in addition to the specified image

Anonymous 16/07/06(Wed)06:45 No. 16338 ID: 0bf3b6

contect: https://youtu.be/7XTe9lDiAhw

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