bodhiandphysics

10 ms·

61.
by bodhiandphysics 4y ago
Take an airplane... it’s dynamics are described by a series of differential equations. We want to know if it’s stable! If the wife values of the dynamics are real and greater than 1 it’s unstable. If the eigenvalues are complex and have
62.
by bodhiandphysics 4y ago
The navier stokes equation is quite literally solved using the diagonalization of large matrixes!
63.
by bodhiandphysics 4y ago
One thing to note is while there are not a lot of quantum algorithms (though wikipedia's list is very incomplete!), some of them are massively useful. Grover's algorithm provides a quadratic improvement in black box search (which
64.
by bodhiandphysics 4y ago
Java has a number of other advantages... you can effectively develop for Linux on a windows box. The vm architecture makes debugging easier. It has a large and useful body of code, including lots of libraries and features that ease inter
65.
by bodhiandphysics 4y ago
Yes... it’s the lingua franca of graphics and scientific computation (including low level ML)
66.
by bodhiandphysics 4y ago
I use malloc more often than I use new and delete!!!
67.
by bodhiandphysics 4y ago
The odd corner case is called data structures... and linear algebra, and memory management!
68.
by bodhiandphysics 4y ago
No... using divide and conquer matrix multiplication with this gives n^2.83. Strassens algorithm is n^2.79. This is good fir 5 by 5 matrices... which are not terribly interesting.
69.
by bodhiandphysics 4y ago
It would have been a little hard for the romans to industrialize textiles... they didn’t have spinning wheels!
70.
by bodhiandphysics 4y ago
Matlab is a useful tool. But you don’t write a fem silver in matlab! And matlab came to the Mac only after the switch to Unix.
71.
by bodhiandphysics 4y ago
Classic ray tracing doesn’t do gi well, and gi is important for materials like blood that do lots of subsurface scattering. Also, blood is a fluid and with fluids your often better off using a ray marching algorithm that can handle implici
72.
by bodhiandphysics 4y ago
The transmissivity is too high in that image, I agree btw. And ray tracing can’t really do convincing blood
73.
by bodhiandphysics 4y ago
This is really really not nitpicking. This is literally what rendering people think about for a living.
74.
by bodhiandphysics 4y ago
It’s not. Blood is a colloid and is actually quite transmissive. Opaque blood looks like plastic. Getting the right values is hard. Blood, like milk, also exhibits quite a bit of subsurface scattering... it’s a hard problem to make it l
75.
by bodhiandphysics 4y ago
You can do pbr with othering rendering techniques like rasterization.
76.
by bodhiandphysics 4y ago
you can ray trace with pbr. Ray tracing is a technique to calculate the amount of light on a surface by projecting light rays from the camera (there are other related techniques as well). Once you have the amount of light on a surface, you
77.
by bodhiandphysics 4y ago
Your forgetting the evacuated tube. The issue with rail launch on earth is dealing with the atmosphere
78.
by bodhiandphysics 4y ago
1) healthcare. 2) education degrees are a problem. They make becoming a teacher financially very risky. They also don’t seem to actually improve teacher quality
79.
by bodhiandphysics 4y ago
Lots of people say this... they’re wrong but the day this
80.
by bodhiandphysics 4y ago
Really if I’m programming c++ I avoid macros (except if guards). Though I do have the advantage that my code doesn’t need to be portable
81.
by bodhiandphysics 4y ago
I know... I know...
82.
by bodhiandphysics 4y ago
No significance!! 1587 is the year Kit Marlowe wrote Tamerlane and Thomas Kyd wrote The Spanish Tragedy. Those two plays revolutionized English drama and started off the Elizabethan literary renaissance.
83.
by bodhiandphysics 4y ago
I’m sure mac was a wonderful dev environment for developing Mac GUI apps. But was it a wonderful dev environment for developing high performance numerical code? Or web servers? Or robotics? Or... Most developers don’t write GUI apps.
84.
by bodhiandphysics 4y ago
Unix you layer a major role in the success of the Mac in two key markets. First max was the cool box for young developers, since it provided a Unix dev environment and this such nice things as Python, ruby, reasonable c++, git, etc. when t
85.
by bodhiandphysics 4y ago
We’re lucky he didn’t claim p=PSPACE!
86.
by bodhiandphysics 4y ago
Sure! Exponential time can be very small in practice. Agda proofs are proofs when the compiler stops churning.
87.
by bodhiandphysics 4y ago
This algorithm solves all np problems. For all possible solutions (there are at most 2^p(x) where p is some polynomial), Check if that solution is correct. This of course takes exponential time. Just because you have an algorithm to solve
88.
by bodhiandphysics 4y ago
Language design used to be central to everyone! It was one of the major core skills of programming computers. Consider for instance how when bell labs had a difficult programming job to do (like write an operating system!), they tended to
89.
by bodhiandphysics 4y ago
Skip lists in practice are faster than balanced binary trees in insertion, since rebalancing is slow, while insert and delete in a sl are very fast (if you have a fast source of random or pseudorandom numbers). Skip list insertion is also v
90.
by bodhiandphysics 4y ago
It’s called Damascus because that was the entrepôt from which it entered Europe. It’s actually from South Asia. A similar thing happened with fabric... muslin and damasque are from India, not Mosul and Damascus

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