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/sci/ Science & Math

Threads added between 2014/01/23 16:00 and 2014/01/23 22:00

157 more posts in this thread. [Missing image file: scientism[1].png]
I see a lot of people here claiming: >if it isn't scientifically proven, then it isn't true Do people only pretend to be this retarded? Read: http://en.wikipedia.org/wiki/Two_Dogmas_of_Empiricism http://en.wikipedia.org/wiki/Against_Method

A janitor spens 7 years drawing a maze

61 more posts in this thread. [Missing image file: 1-pCT6l93[1].jpg]
>Over 30 years ago, a man spent 7 years hand-drawing the most complex, unbelievable and probably unsolvable maze I’ve ever seen. His daughter recently posted the following photos on Twitter and, needless to say, the entire Internet is exploding with questions about her dad. >So who is the man behind it? A professor? A mathematician? A wizard? No, no, and no. The correct answer is… the university janitor. http://www.viralnova.com/unsolvable-maze/ Some of you buy this and put on share
15 more posts in this thread. [Missing image file: you should be able to sol(...).jpg]

Pre-calculus Challenge

11 more posts in this thread. [Missing image file: Sullivan, Precalculus.jpg]
Post problems for me here, and I'll try to solve them.
57 more posts in this thread. [Missing image file: amplutihedron_span.jpg]
I'm glad I left physics - let me tell why "You will never be as smart as Nima Arkani http://www.youtube.com/watch?v=q4Dj8fq30sk You're barely able to understand the basics of theory and you would take a whole life to get a single insight of the kind this guy gets in a day (apparently)" Guys like him and Ed Witten are almost like different species from the rest of humans. Seriously guys. Physics is for 1 rank minds. Its the hardest mental activity ever invented. Don't dare to dream to be a decent physicist, you may be in trouble if you try.

Areas of Mathematics

17 more posts in this thread. [Missing image file: 1389397773396.jpg]
Which, in your opinion, are the most important and most fun areas of mathematics? I think geometry and group theory are easily the most important, but also the most interesting. I firmly believe if a mathematical expression does not have a geometric expression/equivalent in the broadest sense then it has no real value and exists just in our minds. I also believe all the laws of the universe can be expressed in a geometric way, maybe not now, but in the future we will be able to, and if not, this is not the world I want to live in. On the other hand I really can't get myself to like Analysis. I just don't see what it's supposed to tell me or what it wants from me. If I deal with Linear Algebra I always get the feeling I'm moving in spaces and these things really exist, it's like a landscape in my mind. But with Analysis - nothing.
103 more posts in this thread. [Missing image file: Jacob-Barnett-1[1].jpg]
What are your thoughts on Jacob Barnett? Is he a fraud or a genius? http://www.youtube.com/watch?v=4Myy_BBBMG8 http://www.dailymail.co.uk/news/article-1369595/Jacob-Barnett-12-higher-IQ-Einstein-develops-theory-relativity.html http://www.huffingtonpost.com/2013/05/11/jacob-barnett-autistic-14-year-old-nobel-prize_n_3254920.html

Learning Statistics as a Physicist?

16 more posts in this thread. [Missing image file: image.jpg]
Hi /sci/ I just finished my undergraduate degree in Physics and I'm taking a year off before grad school and need some help. I'm somewhat embarrassed to say that I have never taken a formal statistics course in my life and because of that, I'm sure it made things problematic for me in my undergraduate labs and I know I'll need to know statistics and statistical interpretation of results especially in getting publications out. I saw the Gaussian curves, full width half maximum, reduced chi squared, "sigma-confidence", etc. but I never understood what that meant. Since I haven't taken a course in statistics yet (counselors in high school and college were always telling me to do the "Algebra, Geometry, Trigonometry, Calculus, Differential Equations, Linear Algebra" track so I skated away from it somehow and in high school, I was told "statistics is for the stupid kids, if you're smart, you should be in calculus"). Are there any books, guides, videos, websites, etc. that you guys could provide for someone who is at my level but also not too hard to understand (since I've never taken a formal course in statistics) and geared toward physicists? In this year off, I want to get better at all the things I either struggled in or didn't learn before.

Nasa

7 more posts in this thread. [Missing image file: NASA_logo.svg.png]
What does sci think of NASA? Do they still do cool things on a shoestring budget? Are private companies like SpaceX just as good?

quest chin

15 more posts in this thread. [Missing image file: tumblr_mydzi4til31sg22dmo1_400.jpg]
How many unique rowing teams of 4 can possibly be selected from 13 oarsmen, if 2 individuals refuse to work together? >pic unrelated
6 more posts in this thread. [Missing image file: a-fungus-among-us-300.jpg]
Hey fellas; My family drinks a lot of tea; I've been growing a "mold garden" in a jar with the stuff. I'm ultimately looking to end up with either a rich compost or a CO2 generator for an algal farm. Anyone want to chat about similar projects?
7 more posts in this thread. [Missing image file: shitcal.jpg]
What's a good scientific calculator that saves formulas? Pic is current calculator
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Live in London, England >people everywhere >commute all the time >use smart phone to read science articles, finance, learn languages, all manner of self improvement >90% of people I see also commuting are glued to their smart phones >facebook, text messages, Iphones fucking everywhere Smartphones are relatively new. We have the internet in our hands, everywhere, an abundance of knowledge. An abundance of people to communicate with. What are the possible implications on the human species? A unified culture born from the internet? A better educated and informed populous?
2 more posts in this thread. [Missing image file: cosmos.jpg]
What's the difference between Cosmos (the book) and Cosmos (the tv series)
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Why does the Fibonacci Sequence start with 0, 1 and not 1, 1?
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So, I've got a question here. Most AI research is done with specialized hardware designed to emulate the human brain, but as I see it, all human though is essentially a problem solving process, whether it fallls into the realm of conscious or unconscious thought. We know that the human psyche is the result of a good number of chemical reactions in the brain, and that these chemical reactions form a practical way of reacting to the external world. So, practically, the psyche could also be simplified and imitated by programming languages that could replicate (or imitate if you'd prefer) human consciousness. Why isn't this approach more popular in AI research? Are there limitations to what a programming language can accomplish where something like neural networks and the like can succeed?

Gunshot to brain stem

19 more posts in this thread. [Missing image file: mid_sagittal_section_thro(...).jpg]
At what point is consiousness lost? Does victim feel any pain? Any chance of surviving?
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So /sci, Why did every single dinosaur lineage with the exception of birds go extinct around K–Pg? Even the aquatic dinosaurs. Why? Why they all died but many reptile, mammal, etc. lineages survived?
0 more posts in this thread. [Missing image file: the_time_has_come.jpg]
I make this thread as anti-thesis to the negative amplitudehedron thread >>6307287 Here we go: https://www.youtube.com/watch?v=a1zDuOPkMSw
5 more posts in this thread. [Missing image file: 0003ML0000125000E1_DXXX.jpg]
Why wasn't the Curiosity rover powered by photovoltaic panels? Did they want to avoid another Spirit/Opportunity situation by knowing a definite end point to the mission?
9 more posts in this thread. [Missing image file: 12323412343452341.jpg]
What would be the best method towards calculating the "Toughness" of leather.

The deeds they do

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Which modern science popularizer would you say contributed the most to the science? What Neil DeGlass Tyson, Michio Kaku, Richard Dawkins have actually done science-wise? Also is that true that none of the string-theories have evah proposed any experiments atall? Picture completely un-related.
3 more posts in this thread. [Missing image file: 81RVovkZuIL._SL1500_.jpg]
What's your honest opinion of this book?
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Are there earth mineral Surveys? Like a map showing mineral densities ? Looking for gold silver and iron. Earthquakes and volcanoes would also be cool too.

noko

5 more posts in this thread. [Missing image file: problem.png]
Hey /sci/, quick math question because I have no idea how to do it and textbook isn't doing much for me. Let f(x)=2x+3 a. Compute R6 and L6 over [0,3] b. Use geometry to find the exact area A and compute the errors lA-R6l and lA-L6l in the approximates. From what I've gathered, it's obviously a Riemann's sums question and I approach it by getting [0,3] and doing 3-0/6 <--- 6 for how many intervals they want. Getting 3/6 or 1/2. I'm lost from there. pic related
9 more posts in this thread. [Missing image file: m1a1_details_295_of_435.jpg]
Hello /sci/, /k/ here! I was wondering if you guys might talk over a situation with me. Would it be possible to immobilize a tank by jamming a 4x4 up behind the drive sprocket (pic related)? I'm thinking the compressive strength of the wood is high enough that the wheel can't handle it and it is immobilized. Thoughts? Does it check out from a physics standpoint?
5 more posts in this thread. [Missing image file: image.jpg]






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