Archived threads in /sci/ - Science & Math - 1407. page

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Let's talk about Wi-Fi and cellular phones.
I posted these three posts a few hours ago.
>>8317586
>>8317606
>>8318124

It's very clear that microwaves non-thermally interact with cellular machinery via voltage gated calcium channels, and that this spurs negative downstream effects. When do you think this is going to explode and force mainstream science, and thus the public, to get on board and slowly slip out of delusion and denial?

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Hello,

About one month ago I hit my head between my eyebrows, went to the ER and got a CT scan a few days later and they didn't detect anything abnormal.

Now, when I play my electric guitar(bending my head down and turning it a bit to the left to see what I'm doing on the guitar, typical behavior that I've always done like pic related) I'll start to get a bit nauseous, my eyes will start to have... artifacts? I can't explain. Light starts to act a bit weird. I'm not seeing stars or blacking out or anything, but everything looks a bit fuzzy or something and focusing my eyes becomes a bit harder. My hearing in my right ear will suddenly go partially away and I'll have tinnitus, and my balance feels a bit wonky. It takes like 30 minutes to really go away. When I lay down/go to sleep, I feel perfectly fine and nothing like this happens. It's really only when I bend my head down and to the left to play the guitar.

What in the hell is this? I feel like my speech slurs a bit more than it typically does, too. I know that when you listen to loud music, you'll get tinnitus/nauseous, but I'm not playing loudly at all. This has NEVER happened before. I don't even want to play the guitar because it just comes back. This has just started happening within the past few days. I've gone like 4 weeks after hitting my head without any issues like this, at least I don't think. How can I still have complications from hitting my head over one month ago, especially when after a head CT scan, they didn't find anything that looked abnormal? I just want to feel normal again, man.

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Hello /sci/
I have a questions about magnets, how do they behave if you have situation like in the picture.

How much force be on the magnet or object, and how far into the coil would it move?

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Why is there no huge focus on making a smart, strong, nible, android? Why is there no robot race with that being the moon walk? Robots that do specific tasks are nice and all but would it not be better to have one robot that can do just any task a human can do but better without getting tired or bored? An android would make an ideal astronaut.

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How do you prevent/reverse becoming "stupid"?

I'm 23 and dropped out of full time education around a year ago. I find I'm not as sharp as I used to be, say, 5 years ago - this is all a bit hand wavy but bear with me.

I look at maths or science articles related to concepts I at one point was studying and feel like I've never seen them before. This is to be expected - I'm a programmer by day and don't keep most of those concepts "fresh" in my head. But I also find myself struggling to learn new concepts or construct coherent sentences when discussing anything moderately complex, e.g. political topics. I'm particularly concerned about my verbal ability, as even writing out this post took more effort than I would have thought in terms of editing/searching for the 'right' word

I'm not sure what the causes are for this or how much control I have. Big changes I have made since I last felt "sharp":
> stopped doing high intensity exercise
> aged a bit
> let programming and reading about tech minutiae devour almost all my free time. (I even stopped playing games)
> addicted to reading feeds for the rest of whatever free time I have (reddit, 4chan, facebook, news, etc...)

Changes I am going to make
> start doing an 'optimal' amount of exercise (http://lesswrong.com/lw/juc/optimal_exercise/ - I've read (can't cite, it's just in my brain) that your brain "functions better" if you exercise regularly and generally maintain good health, and I'm inclined to believe it
> start writing every day - to maintain verbal intelligence. Even if it's just to myself jotting down thoughts on the daily happenings of the universe.
> read an article a day in a different language (I know a bit of spanish and german, will obviously do it assisted with google translate but will try and parse the sentence structure/tense/semantics myself)

Please tell me I am not alone in this struggle? Any other tips for staying sharp in a broad rather than narrow sense?

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What type are you?

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http://www.nasa.gov/feature/jpl/jupiter-s-north-pole-unlike-anything-encountered-in-solar-system
We waited years for this?
Blunder of the year.
North pole in full res: http://www.nasa.gov/sites/default/files/thumbnails/image/pia21030_main_2_north_polar_full-disk_a.png

South pole: http://www.nasa.gov/sites/default/files/thumbnails/image/pia21031_3_figa_npoleterminatorview2_figa.png

South pole aurora: http://www.nasa.gov/sites/default/files/thumbnails/image/pia21033_jiram_aurora_d.png

Thirteen hours of radio emissions from Jupiter's intense auroras are presented here, both visually and in sound: https://www.youtube.com/watch?v=slE2i0O0pDY

As Juno approached Jupiter on August 27, 2016, it's Jovian Infrared Auroral Mapper (JIRAM) instrument captured the planet's glow in infrared light: https://www.youtube.com/watch?v=i9TtSCkoERw

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Here's 8 hours of the recent space walk and such. I can't find a 60FPS copy it would be great if that's out there

https://www.youtube.com/watch?v=Er3WrGKilD4

Here is some 60FPS footage. https://www.youtube.com/watch?v=cyNbyiglDRg

Commander Jeff Williams and Flight Engineer Kate Rubins of NASA conducted a spacewalk Sept. 1 to retract a thermal radiator, install the first of several enhanced high definition cameras on the station’s truss and tighten bolts on a joint that enables one of the station’s solar arrays to rotate.

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How come evolutionists can't produce any examples of actually positive mutations actually occurring? They always have to resort to mutations they assume happened.
>Inb4 "Not enough time!"
4billion x 0 = 0
The closest thing to "positive" mutations we've seen are just "not that bad" mutations.

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If I wanted to increase or decrease the volume and mass of a planet so that it would have near or equal gravity to earth, what kind of tools would I need to do so?

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don't ask

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https://www.washingtonpost.com/news/morning-mix/wp/2016/09/01/like-its-been-nuked-millions-of-bees-dead-after-south-carolina-sprays-for-zika-mosquitoes/

"Reports out of South Carolina have indicated that when officials approved the spraying of local farmlands with insecticide to prevent the spread of Zika-carrying mosquitos, it accidentally wiped out millions of bees too.

The insecticide in question, called Naled, is known to be "highly toxic" to bees, and these vital pollinators appear to be the latest collateral damage in the fight against Zika.

In response to the ensuing outcry from local farmers after last Sunday’s bout of aerial spraying in Dorchester County, the local administrator’s office announced that the state health department had reported four travel-related cases of Zika virus in the Summerville area of Dorchester County on Friday 26 August.

While the health department reported that no one has been infected from a local mosquito bite to date, Dorchester County officials justified the accidental bee cull on the grounds that the mosquito population remained a threat."

Was this action justifiable?

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Are they really that reliable?

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To continue, we need tools to examine the projective plane we work with, like circles in ancient Greek geometry. We introduce the most fundamental of those tools here, but before we define it, we need a few definitions.

The set of all points incident to a given line is the [math]\textbf{range}[/math] of that line.

The set of all lines incident to a given point is the [math]\textbf{pencil}[/math] of that line.

In a projective plane, let ranges and pencils be [math]\textbf{incidence sets}[/math].

The incidence sets of the point p and line L can be written as In(,L) and In(p,) respectively.

Before we explicitly define this tool, we demonstrate it with the proof of the following theorem:

Theorem 2.1: Any two distinct ranges from the same plane have the same cardinality.

Proof: We observe that every line has a unique range and vice versa, thus the two resultant lines, which we call A and B, are also distinct. By Axiom 5*, we have a point o not incident to either A or B. Now, consider the following function.

[eqn]\begin{align*}
Pe : In(,\textup{A}) &\to In(,\textup{B})\\
\textup{a} &\mapsto \textup{B[oa]}.
\end{align*}[/eqn]

The construction of the points B[o?] for points on A is shown in the pic.

If d and e are any distinct points on A, then the lines od and oe are distinct lines which meet at o. Since o does not lie on B, then by Axiom 1, the points B[od] and B[oe] are distinct. Since d and e were arbitrary, then Pe is injective.

Now take an arbitrary point x on B. Let z = A[ox]. The point z exists and lies on A, so Pe(z) exists. {z, o, x} is collinear and x lies on B, so Pe(z) = B[oz] = x, thus Pe is surjective.

Since Pe is surjective and injective, it is a bijection between In(,A) and In(,B), thus they have the same cardinality. #

The function used in the proof above is the tool we seek, which we will formally define in the next large post.

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What is the most non-lethal injury to the human body possible?