Science, page 3
Physics, biology, space, nature, research findings outside psychology. 108 links, newest first. Page 3 of 3.
Links 101 to 108
The Map of Mathematics
Watch · youtube.com · 11 min · Issue #47
A 2017 video by the channel Domain of Science presenting the whole field of mathematics as a single map, showing how pure and applied fields relate to each other and to their subtopics.
Summary
A 2017 video by the channel Domain of Science presenting the whole field of mathematics as a single map, showing how pure and applied fields relate to each other and to their subtopics. The description lists five corrections to the video, including that 1 is not prime and that the real and imaginary axes were swapped. Linked sources cover counting, zero, complex numbers and the irrationality of pi.
The Equation That Can Stop the Next Global Crisis
Watch · youtube.com · 6 min · Issue #44
Gen.
Summary
Gen. Stanley McChrystal's April 2022 Big Think video argues that risk can be treated as a mathematical equation that anyone can learn. It contends that crises such as 9/11, the 2008 financial crisis, and COVID-19 were foreseeable to some extent, and that the goal is to improve our capacity to predict risk and become resilient to it.
AI Predicts Sudden Cardiac Death Better Than Doctors
Read · hub.jhu.edu · 3 min · Issue #41
Johns Hopkins researchers led by Natalia Trayanova built SSCAR, an AI system that predicts whether a heart disease patient will die of sudden cardiac arrest and when.
Summary
Johns Hopkins researchers led by Natalia Trayanova built SSCAR, an AI system that predicts whether a heart disease patient will die of sudden cardiac arrest and when. It combines two neural networks: one reads scar patterns in cardiac images, the other 10 years of clinical data across 22 factors. The team reports it beat doctors' predictions and was tested on an independent cohort from 60 U.S. health centers.
Electricity Maps
Tool · app.electricitymap.org · Issue #39
Electricity Maps is a site with real-time and historical electricity data worldwide, covering energy production sources, CO2 emissions, prices, and cross-border exports.
Summary
Electricity Maps is a site with real-time and historical electricity data worldwide, covering energy production sources, CO2 emissions, prices, and cross-border exports. It also offers an API with a 14-day trial, after which access appears to be paid.
This Equation Will Change How You See the World (the Logistic Map)
Watch · youtube.com · Issue #28
Veritasium's video explains the logistic map, a simple equation that the description says connects fluid convection, neuron firing, and the Mandelbrot set.
Summary
Veritasium's video explains the logistic map, a simple equation that the description says connects fluid convection, neuron firing, and the Mandelbrot set. It draws on James Gleick's Chaos, Steven Strogatz's Nonlinear Dynamics and Chaos, and Robert May's 1976 Nature paper, with examples such as dripping faucets and period-doubling in biology. Animations and interactives are credited to Jonny Hyman.
Why Is It So Hard to Cure Cancer?
Watch · youtube.com · Issue #25
A TED-Ed lesson by Kyuson Yun, directed by Artrake Studio, explains why cancer remains uncured despite major advances such as sequencing the human genome and eradicating smallpox.
Summary
A TED-Ed lesson by Kyuson Yun, directed by Artrake Studio, explains why cancer remains uncured despite major advances such as sequencing the human genome and eradicating smallpox. It presents the challenges behind the difficulty and notes that cancer affects more than 14 million people and their families at any given time.
The Euler diagram article
Short · en.wikipedia.org · Issue #24
A Wikipedia article on Euler diagrams.
Summary
A Wikipedia article on Euler diagrams.
How brain cells keep a resting charge
Short · tiktok.com · Issue #24
Resting brain cells sit at about negative 70 millivolts so they can fire
Summary
Brain cells hold a negative resting charge by pumping sodium out, a process that uses a large share of the body's energy.
The speaker explains that brain cells keep a resting charge of about -70 millivolts by constantly pumping sodium out and potassium in. The pump moves three sodium ions out for every two potassium ions in, and it uses a lot of energy. The speaker estimates it accounts for about 55 percent of the brain's energy use, around 10 percent of the body's total, which keeps neurons ready to fire.
Key points- Resting brain cells sit at about negative 70 millivolts so they can fire
- A pump removes three sodium for every two potassium it takes in
- The speaker estimates this pump uses about 10 percent of the body's energy
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