Initial Condition

Image processing is so common place that it's easy to forget about all the math behind the scenes. Some of the most ubiquitious techniques were started development in the 1800's, but not for image processing! Many people are familiar with a Gaussian Blur, but did you know the blurred image is really just a solution to the heat equation? In this pose, we explore this connection in-depth with Python.

how to generate random numbers in different ways and learn the techniques to generate unique id's using random numbers in javascript

The combination of charge conjugation, parity, and time-reversal symmetry is known as CPT. And it must never be broken. Ever.

Article URL: https://content.csbs.utah.edu/~butner/systems/DynamicalSystemsIntro.html Comments URL: https://news.ycombinator.com/item?id=34482236 Points: 1 # Comments: 0

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What it Shows We start with a vertical wheel—like a Ferris Wheel, but with a diameter just under 1 meter—in neutral equilibrium and free to rotate in either direction. From the ends of each of the eight spokes hang small buckets with drainage holes cut out of the bottom. Fixed directly above the center of the wheel is a faucet connected to a pump.

Causality refers to the relationship between cause and effect, but pinning down its precise meaning has long perplexed philosophers and scientists. Trace the complex history of causal concepts from…

This is a report on a dynamic autonomous magnetic interaction which does not depend on polarities resulting in short ranged repulsion involving one or more inertial bodies and a new class of bound state based on this interaction. Both effects are new to the literature, found so far. Experimental results are generalized and reported qualitatively. Working principles of these effects are provided within classical…

Article URL: https://plato.stanford.edu/entries/qm-retrocausality/ Comments URL: https://news.ycombinator.com/item?id=35183419 Points: 2 # Comments: 0

Stephen Wolfram applies lessons learned from the Wolfram Physics Project to construct a proper framework to explain why--and to what extent--the Second Law of thermodynamics is true.

Article URL: https://en.wikipedia.org/wiki/Chaos_theory#Jerk_systems Comments URL: https://news.ycombinator.com/item?id=34487010 Points: 1 # Comments: 0

How do you train neural networks on time series that are non-uniformly sampled,  irregularly sampled, have non-equidistant timesteps, or have missing or corrupt values? In the following post, I try to summarize and point to effective methods for dealing with such data.

This is something of a rant, but I would greatly appreciate your reflections as it's a subject that is very confusing for me. Many of you are much smarter than I am, so any thoughts you have around this would be appreciated!People recently have been positing that the big bang occurred as result of a black hole (i.e. black hole sucks up more and more material, gains more mass, until it explodes in a big bang into a…

Author: Feng Zhu Editors: Nayiri Kaissarian, Jimmy Brancho, and Noah Steinfeld What is Chaos? Is our solar system stable, or will the orbits of the planets at some point collapse into the Sun? Clos…

an Open Collaborative project to explore the implications — theoretical or practical — of the PDE perspective of ConvNets - GitHub - liuyao12/ConvNets-PDE-perspective: an Open Collaborative project...

New British train station design identified as cellular automata rule 30. Generating rule-based patterns. And a website that lets you try it yourself.

One popular example of chaotic behavior is the butterfly effect—a butterfly may flap its wings in somewhere in the Atlantic Ocean and cause a tornado in Colorado. This remarkable fable illustrates how the extreme sensitivity of the dynamics of chaotic systems can yield dramatically different results despite slight differences in initial conditions. The fundamental laws of nature governing the dynamics of physical…

Article URL: https://en.wikipedia.org/wiki/Arrow_of_time Comments URL: https://news.ycombinator.com/item?id=36110307 Points: 1 # Comments: 1

How do physicists solve a problem like entropy?

A blog by Sam Greydanus