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Dumbass here. I don't know where else to turn. I'm not asking for homework help since I know you guys hate that shit. I'm just asking for an explanation.
I have been to several tutors, my professor's office hours, Khan Academy, and countless pages. I still can't wrap my head around spans or linear independence.
For the love of christ someone please help me. I was literally never good at algebra
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>>7941480
Ok, so imagine a 1 dimensional space take the Real number line for instance. You want to describe the position of something that line. How many real numbers would you need to describe the position?
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>>7941490
1 real number
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>>7941480
So what it is about span or linear independence you don't get?
The intuition should be very easy to get if you approach it geometrically. Have a look here.
http://ocw.mit.edu/courses/mathematics/18-06-linear-algebra-spring-2010/
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Could we use math to communicate with extra terrestrials
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Yeah, we'll just have to tell them we use base 10 first.
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Sure.
Define a set in strictly mathematical terms. No language, as that would not be intuitive.
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>>7941425
Yes. [math]a^2+b^2=c^2[/math], and the speed of light remains constant in a vacuum regardless of your origin of life.
We could communicate mathematics with them, but we first need to establish axioms. I believe binary is sufficient, as it has intrinsic properties pertaining to wave dynamics and electricity, and is easy to communicate.
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>The speed of light is EXACTLY 299,792,458 m / s
>The speed of light is [math]literally[/math] [math]an[/math] [math]integer[/math]
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>>7941001
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True, this is because the speed of light can be derived from basic electromagnetic principles. Unfortunately, the exact speed is limited by the fact that we don't have a 100% precise measurements of the meter or the second.
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Speed of light in a vacuum...
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How long would it take for you to bleed out after shooting yourself in the brain?
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5 lightyears
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[eqn]- \frac{1}{12}[/eqn]
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however long it takes till the next 4:20
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I'm dumb as fuck. All family members are dumb as well. If I marry a scientist or something what is the chance that the kid will be smart?
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>>7940425
not good
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>>7940425
No, you'll have a child of average intelligence. It's a well known theorem from psychology:
>Smart+smart = smart
>Dumb + dumb = dumb
>Smart + dumb = average
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>>7940429
lol
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Does anyone know what youtube video this webm came from?
Or at least know what sort of physics is occurring to the water here? Googling fluid dynamics videos didn't help
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>>7940265
Waves in an open channel?
I can't open webms so guessing it might be interference
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>>7940265
It looks like a regular wave, that just happens to be contained in a narrow trough.
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>>7940265
1D transverse waves
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So i was talking to this guy earlier who claimed to be a professor at a university teaching astrophysics.
He told me that the big bang only created the milky way and right now physicists are looking for a "Porthole" somewhere in the milky way.
He also told me that the universe was a flat hologram, the moon landing was fake and the Egyptians traveled at light speed and had electricity.
Also that he has a device at the university that projects a small item to a 3d hologram or some shit.
This guy is bat shit insane right?
He actually seemed to know his stuff with astrophysics and maths.
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>>7940059
He also told me that he predicts that in august a big meteor shower will happen and a very large meteor will pass earth and time will slow down by 1000th of a second.
meaning that a second for us will be only 59 point something seconds.
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>>7940059
Did he say anything about pyramids?
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Can we discuss psychology on /sci/ or not?
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>>7939561
No. The reason being that /sci/ in either 15-17 year oild highschoolers or autistic mid-20s math PhDs.
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>>7939561
Of course. Psychology is a science, regardless of the fact that most "psychologists" are not scientists.
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>>7939569
Wrong fag, /sci/ is full of professionals who have experience and know what they're doing. Go be dumb somewhere else, brainlet.
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Hey /sci/,
I've been thinking about the future and I want advice on how best to raise a child academically, in light of a very fierce competitive globalized environment. I am adamant that a child should choose what he or she wants to do (one of the worst things a father can do is stymie the interest of his child by being overbearing), but if they are interested or expresses an interest in a STEM field I want to best provide for them. I am worried that the Canadian public education system is too behind to offer them a competitive advantage or even equal footing (they learn how to add / multiply fractions and is introduced algebra in all of middle school) to others, so I wanted to take matters in my own hands. I'll be working hard to provide for them, so outside of expensive preparatory ivy-league tutors money wouldn't be a huge issue. Any advice?
Please remember they will be just children.
Also education thread, I guess.
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well its quite obvious. you will insert rudin into the womb and if he does no become well acquainted with abstraction then he will be aborted as his brainlet status will only pollute the gene pool
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Choosing for them is in avoidable. There's a reason children are basically second class citizen (can't financially sort themselves or make decisions of their own - think how they have to get their parents signature)
If you don't want to be over bearing just get them interesting in what you want (I'm assuming stem)
Just do those junior experiments such as mouse trap car. Marble rollercoaster. Rockets. Penny water surface tension. Card board boat races. Raising butterflies.
Or just get them very familiar with the scientific method. Anything can be a science just that other studies are basically joke sciences because they have no respect for the scientific method (sociology and rampant publication bias)
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>>7939209
>raise a child academically
the recipe for disaster
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Prove me wrong.
Protip: You can't.
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This is correct.
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The LHS is multivalued while the RHS is only positive.
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That's a definition not a theorem
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http://www.digitaltrends.com/cool-tech/google-puts-boston-dynamics-up-for-sale/
>Though the video amassed 14 million views and a number of ecstatic tech articles drooling over the possibilities, Google remained uncomfortable with the future of Boston Dynamics. According to more emails made public, Google had serious concerns about the company’s affiliation with Alphabet and instead desired to move away from the group.
>“There’s excitement from the tech press, but we’re also starting to see some negative threads about it being terrifying, ready to take humans’ jobs,” wrote Courtney Hohne, Google’s director of communications. “We’re not going to comment on this video because there’s not a whole lot we can add, and we don’t want to answer most of the Qs it triggers.”
>In the same note, Hohne advised those she was communicating with to “distance X from this video,” and cited an unwillingness to start a new “media cycle” on BD’s involvement with Google. So while people may have joked about how Boston Dynamics’ mistreatment of the robot could spark a robotic uprising, it seems Google took that response to heart and decided to take Google X in a different direction.
All those fags saying "HURR SKYNET" and "OMG SCARY" may have just fucked robotics for the next 10 years.
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>>7939124
Orrrrrr Google just scalped all of the info it could from BD and are making a smart business move to sell BD while they are very much in the public light for this video. Now Google will just go and make their own robotos while making a pretty tidy profit on their brief ownership of BD.
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>>7939124
>people are getting too aware
>we're gonna do this stuff in private instead
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>implying Google isn't working on this shit in the shadows
BD is a diversion.
I've never studied physics.
What do we really know about the Big Bang?
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>>7939094
It was very loud and killed a lot of animals.
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>>7939094
It was bright as fuck.
Probably loud, too.
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>>7939094
that it happened
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By what process can someone spend an hour pleasuring themselves in a debauched state of lusty perversion to things that would usually make them cringe or have their skin crawl, utterly into it, then climatically blow their load and instantly feel complete disgust and total contempt with themselves?
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>>7938427
Don't know, but you are now aware that at any given moment in time your feelings and opinions are highly subjective and a consequence of some arbitrary vector of chemicals.
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>>7938427
you watch porn = happy chemicals = strong signal to keep doing it
you watch weird porn = happy chemicals + other chemicals = stronger signal to keep doing it ... I've read it a long time ago so i dont remember exactly which neurotransmitters are involved, but there actually is more stuffed released from your brain, when you watch furry traps. The reason for that is the shock/fear of watching/doing something wrong
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i was looking at the red bull jump and noticed that the earth looks too curved from the height of a helium ballon launch. Mathmatically that would make the earth much smaller. Or is it the camera?
There are other videos of the horizon being at eye level.
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>what is a fisheye lens
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Look at the fucking pod it's obviously fish eye lens
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aight /sci/
Comp sci PhD student here. I'm going to a conference in a couple of months to show a paper I wrote, but I was asked to put together a "technical poster" for some workshop the University is hosting beforehand.
Never done a "technical poster" before. Got any tips for software to use before I make something mediocre in powerpoint?
Ideally I'd like something that lets me show process flows clearly.
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photoshop
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>>7936047
It's about how you use it and not what software you use.
If you're one of the special ones that think red on black and yellow on white are good design choices then pirate and read one of these books:
http://4chan-science.wikia.com/wiki/Universal_Material#Presentations
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i usually prep mine in inkscape