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/sci/ Science & Math

Threads added between 2014/01/23 04:00 and 2014/01/23 10:00

50 more posts in this thread. [Missing image file: Erdos_2.jpg]
- Is 1 a prime number? - Is zero even, odd, both, or none? - Is zero a natural number? - What is the degree of the polynomial p(x) = 0? - Is 0/0 defined?
4 more posts in this thread. [Missing image file: PhysRevLett.112[1].03.png]
http://physics.aps.org/synopsis-for/10.1103/PhysRevLett.112.030602 Sounds a little like Maxwell's Demon
28 more posts in this thread. [Missing image file: 9pVb24e.png]
I can understand how natural selection can change a species over time: things adapt to their environments and selective mating ensures beneficial traits are passed down. This makes complete sense to me, but I don't understand how life began. How did what amounted to nothing with sentience evolve into what we have today? I'm not sure if a God or Gods exist. I definitely don't believe a theoretical God created humankind, but I'm not knowledgeable on the origin of life enough to say with complete certainty a God does not exist. Maybe God created the first forms of life, and things went from there? Can /sci/ clear my head around this? >what is sentience and how did it come about? >if everything was at one point a collection of gases, how did life come to fruition? How did inorganic substances suddenly become organic life? >how did asexual reproduction evolve into sexual reproduction? There is no methodology for natural selection here
18 more posts in this thread. [Missing image file: WaveCollapse.jpg]
>the wave function collapses when it is observed does proving this wrong even yield any prizes? niels bohr and his buddy quite obviously made this all up on the fly because they couldn't explain how a world of logic is built upon a world of probability. but certainly, most people understand that it's bs... right? right guys? you know why a wave seems to collapse into a particle when observed.
1 more posts in this thread. [Missing image file: 1t5fnqt.gif]
Can anyone help m check my answer, Using the washer method find the area of the solid generated by revolving about the x axis bounded by y=x^2 +1 and y=x+3
22 more posts in this thread. [Missing image file: electrical-computer-engin(...).jpg]
do engineering interns get drug tested?
14 more posts in this thread. [Missing image file: earth_1_orientation.jpg]
Does the Earth go around the Sun or does the Sun go around the Earth? How do you know? HOW DO YOU KNOW MAN?!?!?
9 more posts in this thread. [Missing image file: tumblr_mioknr3kUd1rd8x3eo1_500.jpg]
This question may seem a bit ridiculous, but I figure it's better to ask you guys than /v/. I recently finished Metal Gear Rising: Revengance and the entire game (as with most of the Metal Gear series) focuses on the use of nano technology to create superhuman killing machines. There is one part of the game in particular where one of the game's anti-villains mentions the usage of fear and pain inhibiting nanomachines to help soldiers carry out their duties without hesitation. Is this even feasibly possible? In what ways can nano technology and biochemistry go hand-in-hand with one another?


10 more posts in this thread. [Missing image file: a0e78c1756467daa723ddd612(...).jpg]
What's your specialty, degree, title and place of work (company and country)? Age of acquiring phd for the first time. The most interesting field in your opinion [inb4: electrostrong], why are you not in it, if you are not? Particle physics vs. QFT. Can't really decide. I mean, particles are like pokemons - it's like there are hundreds of them and yet you keep discovering more; QFT is like the final frontier of the science enterprise, but also fairly difficult to get a job in, I imagine.
10 more posts in this thread. [Missing image file: image.jpg]
I like STEM beacuse they are the only subjects were opinions don't matter. I fear everything else and think that we should put STEM above all other priorities and aggressively protect it so the liberal arts people don't pollute our presciouse calling with their degenerate beuracracy and subjectivity. That is all.
1 more posts in this thread. [Missing image file: Join us on the Moon!.jpg]
>Donate 100 bucks >Get your name and a sentence or two on the moon Why aren't you in on this? Space is sweet, and the message will outlast any headstone on your grave. If the probe makes it... http://www.lunarlion.psu.edu/
11 more posts in this thread. [Missing image file: How-to-Become-a-Straight-(...).jpg]
What do you think about this book?

Physical Mathematics Books (Or just vector calculus)

15 more posts in this thread. [Missing image file: article-0-15CB9EB0000005D(...).jpg]
Any physics majors here? What books do they use to teach physical maths? I'm talking vector calculus and analysis... div, curl, grad, stoke's theorem for cartesian, spherical, cylindrical etc. I'm struggling with my class, we use really shitty books that have no rigour whatsoever like Arfken and Hassani. Please help. I desperately need it.
2 more posts in this thread. [Missing image file: 4Mzg702.png]
could some one help me in an integral promlem? ? 52cos^3(66x) dx here's my work: 52? cos^2(66x)cos(66x) dx 52? (1-sin^2(66x))cos(66x) dx subsitute sin(66x) for u u= sin(66x) (1/66)du=cos(66x)dx plug back in (52/66)? 1-u^2 du (26/33)(u-((u^3)/3) plug back in (26/33)(sin(66x)-((sin^2(66x))/3) when i type it in it says its wrong, someone wanna point out where i made a mistake?
1 more posts in this thread. [Missing image file: synthesis.jpg]
A.I. Whats it all about?

The Astronomy Picture of the Day

3 more posts in this thread. [Missing image file: hchi_fneyer_small.jpg]
Double Cluster in Perseus This lovely starfield spans some seven full moons (about 3.5 degrees) across the heroic northern constellation of Perseus. Just right of center it holds the famous pair of open or galactic star clusters, h and Chi Perseii. Also cataloged as NGC 869 (right) and NGC 884, both clusters are about 7,000 light-years away and contain stars much younger and hotter than the Sun. Separated by only a few hundred light-years, the clusters are both 13 million years young based on the ages of their individual stars, evidence that they were likely a product of the same star-forming region. Always a rewarding sight in binoculars, the Double Cluster is even visible to the unaided eye from dark locations. Not seen in binoculars though, and not often depicted in telescopic images of the region are faint clouds of reddish ionized hydrogen gas found throughout this remarkable cosmic skyscape. A color composite, the image includes narrowband data to enhance emission from the hydrogen clouds. Visible toward the upper left of the wide field of view is another, smaller open star cluster, NGC 957, also of similar age, distance, and possibly related to the more famous Double Cluster in Perseus. Tomorrow's picture: light pillars from a little planet

Fucking Journal Access

0 more posts in this thread. [Missing image file: GetALoad.jpg]
Hi, I need access to an AES paper. I'm not longer affiliated with a university and this paper isn't related to work so my Company wont pay for access. I've searched everywhere, but I can't find a freely accessible copy of this paper. Can someone with access please upload this paper to some where freely accessible? I will be eternally grateful http://www.aes.org/e-lib/browse.cfm?elib=16477
7 more posts in this thread. [Missing image file: The Weather Project.jpg]
Does anyone have tips for getting into information security or digital forensics? I'm a college student and I'm a bit unsure of the classes I should be taking, because of how uncorrelated the courses seem to be. pic unrelated, just a piece I like.
3 more posts in this thread. [Missing image file: image.jpg]
Why is it assumed that you can just replace s with jw to plot the frequency response of a transform? I can understand why it works for functions like e^(-at), but why does it work for functions like the unit step function where the region of convergence does not include imaginary numbers?

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