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Should I be concerned currently 19 using cannabis every so often. Is it changing me as a person??
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Yes, stop it with the cannabis. Heavy use causes decreased motivation, working memory etc.
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>>9069633
Quick google research.
>Marijuana these days can cause changes in the brain that impair learning, especially in teenagers as their brains have not finished developing. Brains are not fully developed until the age of 25 or 26. Chronic marijuana use can lead to changes in both personality, judgment, and reasoning skills.
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>>9069633
>Should I be concerned currently 19 using cannabis every so often. Is it changing me as a person??
Yes.
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Hey /Sci/
I am someone who has been struggling with anhedonia, feelings of depersonalization and procrastination for quite some time. I've tried different things in my attempts to treat or cure this issue.
Things that I have tried and worked somewhat, but wasn't enough
>Exercise
>Keto diet
>Bacopa Monneri
>Testosterone Injections (Works great actually, it's just that it stops working as good and you have to control estrogen levels plus pinning every week in the butt sucks).
It looks like every time I take a drug that increases dopamine all my issues go away, my imagination begins sparking with thoughts and vivid imagery. I become driven, competitive and very focused, obsessed almost, specially with aesthetics and music. This happen to me when I take as low as 5mg of Dexamphetamine, lasts around 4 hours, which leaves me with a relaxed but empty mind that feels like it's floating in space...
>Why bother make a thread if I have already found a drug that helps?
Well, I cannot take Dex more than 3 days a week or my tolerance increases substantially and I become dependent on the drug just to get out of bed. The ups and downs are also a thing that seems to really mess with me mentally, it's hard to keep goals when you suddenly lose your way into depression, and have to raise up yet again.
So, I've been thinking. What if I get a drug that also increases dopamine, but in a more steady and stable manner such as Selegiline? The half life is more than 24 hours long, and since it won't increase my dopamine levels extraordinary high, it might be just what I need to boost my mood and stay on track of my goals, even if that comes with having to sacrifice the euphoria shorting acting medication might give me. I've read some good reports on the drug, but it does seem to be a hit or miss for some people.
I can buy a 6 month supply of Selegiline online for only 50€, so that's great.
What are your thoughts, does my thinking make sense to you? Worth a try?
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Wew, I apologize for all the words.
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Bamp
Help a brainlet decide important life drug decisions.
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>>9069336
>needing drugs
brainlet
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What is the likelihood that we are living in a simulation? What consequences would that have for us if it were true and we could prove it?
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Why would anyone care whether we are in a simulation or not, we already know that we might have free will but no will to change anything or even have the necessary power to control anything.
Just chill and do some math
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>>9068728
Somewhere between 0% and 100%.
As for consequences... None so long as we don't find out - otherwise, pic related.
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Why would I ever have wanted to join a simulated reality where I am not experiencing hedonistic fulfillment to the max.
If it was forced upon me, then by who and why? And where did they come from?
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Anyone here with a master's degree or higher in statistics?
What's your job like?
How much do you make?
Do you enjoy what you do?
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I'll bump because I'm also curious
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>>9068166
>300k starting
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>>9068166
Fuck i still have that 877-cash-now theme stuck in my head
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Does Having Less Hair Make You More Smarter?
Anonymous
2017-07-27 11:26:30
Post No. 9068078
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Many geniuses were bald or partially bald (Grothendieck, Einstein). Or short hair at least (Von Neumann, Terence Tao). Too much hair weighs down your head, saps blood flow from the brain. Is this why we see so few women geniuses? Too long hair is heavy, pulls at the scalp, affects the head. The Iranian Fields Medalist who recently passed had short hair, Rosalind Franklin had short hair. Less Hair = Greater IQ?
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I don't advise a haircut, man. All hairdressers are in the employment of the government. Hair are your aerials. They pick up signals from the cosmos and transmit them directly into the brain. This is the reason bald-headed men are uptight.
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no
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>>9068100
What that hobo did has zero applications though, so its worthless wankery
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Want to feels like ripping your eyes out?
>>>/r9k/38601188
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>>9060983
>equation
Closed the window there.
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>>9060983
The answer is 58. If you get anything else please brush up on your 3rd/4th grade math.
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Is /sci/ SJW's or rational centrists?
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>>9056391
We're skeptics. Alt-right talking points are debunked here every now and again just because of our close proximity to their hive, but SJWs at this point just get laughed at. Like the whole meming frenzy we had over the Bill Nye gender propaganda.
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>>9056407
I've seen plenty of posts saying thats its ok for minorities to hate whites since whites are the only race with a history of murdering and raping other races
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>>9056415
>since whites are the only race with a history of murdering and raping other races
kek
They're just trying to get your goat, OP. Or they're purposefully subverting the equally false claim that only minorities participate in such activities. Trolls trolling trolls trolling trolls is an old mantra of this place.
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Where can I buy hydrogen chloride, mercury fulminate and ammonia? I really need them.
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Looking at the picture you seem to want to make some extreme laxative?
You planning to put it into your moms coffee? Please upload vid if it works.
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>>9071633
Your local FBI office usually sells extra. You should.try contacting them.
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What is the implication if the possibility that time and space being an illusion is true?
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>>9071354
WEED LMAO
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>>9071354
What is illusory time and space supposed to mean?
We're hallucinating them entirely?
There's a data structure we perceive as time and space but maybe there's another way to interpret it?
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>>9071437
Yes. Maybe were missing a big piece of the picture that we can't detect with our senses. Think about how you perceive time and space when you dream but realize you have been stationery the whole time when you wake up.
Anonymous
Argument in logic about definitions 2017-07-29 12:34:41 Post No.9071282
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Argument in logic about definitions 2017-07-29 12:34:41 Post No.9071282
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Argument in logic about definitions
Anonymous
2017-07-29 12:34:41
Post No. 9071282
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So I had an argument with someone, and I was wondering what you guys think. The question is this:
When you define a name for something, should you use an if statement or an iff statement?
For instance - "a square matrix is called diagonalizable if/iff it is similar to a diagonal matrix".
Would you write the definition above with if or iff? Please explain why.
The other guy said that you have to use iff because you want to make a stonger statement - "if you have a diagonalizable matrix it is similar to a diagonal matrix AND if you have a matrix which is similar to a diagonal one it is diagonalizable".
I said that you only need to use if, because a definition is simply giving something a name - the only thing you do is specify a requirement for calling a certain matrix a specific name. "Diagonalizable" has no meaning without the definition, so saying that "IF a matrix is diagonalizble THEN it is similar to a diagonal one" is a tautology (because it is the DEFINITION of diagonalizable), which means that using iff in a definition makes the statement empty (it's basically saying "if a matrix is diagonalizable it is diagonalizable").
So what do you say? Naturally, the answer should apply to any similar example (meaning, only definitions that give names to objects that meet certain requirements).
Thanks a lot for your help!
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"A if B": B=>A
"A iff B": B<=>A
Depends whether B is a subset or identical to A.
>definition is simply giving something a name
By definition a definition defines exactly what something is so you probably should use iff.
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Whoever uses if should get beheaded.
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>>9071298
read what is written:
>Naturally, the answer should apply to any similar example (meaning, only definitions that give names to objects that meet certain requirements).
The thread is ONLY about definitions that give names to objects that meet certain requirements.
Anonymous
parabolic or spherical? 2017-07-29 10:50:17 Post No.9071104
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parabolic or spherical? 2017-07-29 10:50:17 Post No.9071104
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If a an elastic membrane is put under a uniform load, such as a weight of water above it, would it curve in a parabolic surface? How exactly would one go about calculating the shape it would take? Sorry for brainlet question. Pic related.
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>>9071104
just to clarify, this is not for any academic purposes. I saw some guy on youtube make a "parabolic" mirror using air pressure, vid related. But as comments correctly point out, what he actually gets is a spherical approximation of a parabola because air pressure is uniformly directed normal to the surface at all points of the membrane.
I was wondering if you could fix this by using a force field of uniform direction such as gravity to do it instead. But I'm not quite sure how elastic membranes behave when deformed, or how water pressure would be distributed in the membrane bit.
If water doesn't work, would covering it in some magnetic material and applying a strong magnetic field work instead?
video in question
https://www.youtube.com/watch?v=8CLRTa_ocmo
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parabolic. Water would work if it is elastic enough. No clue on how to calculate how much it would stretch tho.
But once you have the diameter and depth calculating the focal point is highschool math.
So you can work in reverse if you have a focal point and diameter in mind and see how much you want it to stretch.
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>>9071128
Oh, I know how to find the focus of a parabola. I'm just asking to see if there's any point in trying to build something like this, because the more aberration the shape has, the less focused the "focus" is. If this does indeed physically create a parabolic surface, it might be a way to make a cheap home made parabolic mirror without the need for ultra precise machining or whatnot. Similar to what the guy in the video does with air, just turn it around and use water to stretch the same sort of relfective plastic.
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Hi I'm a big adult, I'm 24. I saw the college acceptance thread so idk if it's kids here or what.
I suck dick at problem solving. This is stopping me from passing job interviews and ending this hellish life of neetdom and being (in terms of housing and food) dependent on my parents. I freelance and make money, but I can't do this shit anymore.
Thought on getting better at verbally problem solving? I found some books and practice problems which feel like they're helping, but it's only been a few days desu.
Failed my third on site interview. Blown through 30+ phone interviews. Can't do it anymore folks. I need to get better at this shit.
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You will absolutely get better with practice. A few days isn't long enough to see results, but keep working at it.
When you're practicing, try to replicate the real situation as much as possible, if you can. Pick a practice problem and talk out loud through your thought process while you're working on it as you would to an interviewer. Even better if you have another real human being there while you're doing it.
That's for training you to solve problems on the fly while talking out loud, but it may also be beneficial to just practice solving problems in general if you're not used to it. Try to be methodical and approach the problem from different angles. There are good books like How To Solve It by Polya that talk about this.
As for failing interviews: be tenacious. Some of the most autistic, retarded people have jobs - thus, those same people were able to pass an interview. You can too.
Good luck. Independence is awesome. I hope you reach it.
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>>9070670
practice for sure.
field?
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I just realised you need movement to represent 3 dimensions on a 2 dimensional graph.
This is why we fucking need space time in our 3D world. Holy fuck, I finally see it clear.
It might sound trivial to you but I'm from a shithole and never had a chance to study math.
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I don't know what you mean by "we need spacetime in our 3D world", but is this what you're talking about?
https://en.m.wikipedia.org/wiki/Stereopsis
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>>9070589
No it's not that. Time is a mere illusion caused by consciousness. We can only "see" in 3D but reality does not have only 3 dimensions. At the very least, there is a 4th dimension and the way we perceive it is time.
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>>9070601
In fact, our eyes see in 2D and we can add depth thanks to light.
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>Let A= {xRx | x=-x ^ x∉O}
>What is A
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What is O?
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>>9070455
no, A
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>>9070462
>x∉O
First I need to know what O is.
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this is a serious question but would pushing the planet further away reduce global warming? Like couldn't we tether the planet to some outpost in space that slowly moves the orbit away from the sun at the rate linerear to global warming? Like so, we bolt a massive tether to the planet all the way into space and slowly use massive rockets to push it away from the sun slowly.
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it's pretty hard (easy?) to reduce a non-existent problem
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>>9070355
Good luck finding the jordanized form of global warming.
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>>9070352
>this is a serious question but would pushing the planet further away reduce global warming?
Yes, but it would reduce the amount of sunlight, which would reduce plant growth and agricultural production. Probably not worth it even if it was magically feasible.