#PhysicsFactlet
Magnetic hysteresis: In a ferromagnet the equilibrium configuration is with all magnetic moments aligned with each other. If we want to flip them, we need to flip all of them at the same time, which requires a stronger field than if the moments were independent, resulting in the characteristic hysteresis loop.
(Simulation done by numerically solve the Landau–Lifshitz equation with a tiny bit of noise added to speed the process up on a square grid of magnetic moment with periodic boundary conditions.)
Indian musician and vocal coach, Mr. AV Peace, employs a really creative method in his teaching. He draws out these intricate maps to help visualize notes and sounds. They’re quite mesmerizing.
Have there been any attempts at visualizing the federated network? Something that would include currently known instances, the ones which are blocked etc.
Visualizing the network may yield insights into the overall health and function and could be continuously monitored for issues. Or just to render pretty pictures.
I'm looking for post-doc research opportunities or web/software development roles, ideally a combination, as in digital humanities research.
My previous research experience is in heritage and higher education for the arts.
My PhD was about knowledge frameworks and the affordances of digital tools and representations in research, in relation to research reuse, transparency and inclusivity.
I would love to be able to contribute more to innovative work on research and knowledge representations.
I am open to new possibilities! In particular I am interested in the possibility of becoming involved in sustainability and biodiversity-related research.
I am a full-stack web developer, and have a good deal of front-end design experience. I am open to all opportunities, particularly remote working!
I am not great at this self-promotion thing...
I will be putting a portfolio site online soon, but am happy to share a CV with anyone who is interested in the meantime.
Mini book review:
Johnson’s The Ghost Map, 2006.
A terse and lively account of the cholera epidemic, London at the time, and John Snow’s work together with Henry Whitehead and others. The grander arc on city development is a bit more tenuous and feels like overplaying Snow’s legacy.
Apparently gets the historical details right (unlike e.g. Tufte). Good pointers to further reading. Minus for not including a good reproduction of the maps.
"The Titanic is the Marilyn Monroe of shipwrecks."
Fizz posted "Titanic: First ever full-sized scans reveal wreck as never seen before," the first full-sized digital scan of the Titanic, with visualizations pieced together from 700,000 images collected by remote controlled submersibles. (Title via pthomas745 in the comments!)
A beautiful day in Boston, and in anticipation of getting my walking boot off next Friday (🤞) I tried walking a bit on a dirt path with no issue and listening to talks for my #AcademicRunPlaylist! Also I found some wild asparagus, which was absolutely delicious. (1/9)
Retro-futuristic interior design. I'm a stylized character modeler, not an architectural visualizer or interior designer, but it can be fun to explore other visual disciplines. 🙂
Anyone know of work on visualizing simplicial complexes in 3D? Laying out edges, triangles, and tetrahedra, etc. I'm thinking something along the lines of the work on graph layout and visualizing #networks, but doing it in 3D, and for simplicial complexes and hypergraphs/#HigherOrderNetworks.
#PhysicsFactlet
In a dielectric medium, the charges are not free to move around, so electromagnetic waves are slowed down a bit, but otherwise can freely propagate.
In a metal, some of the electrons can move around, and thus tend to absorb and/or reflect electromagnetic waves.
But at the interface between a dielectric and a metal it is possible to have a mode that is part electron oscillation and part electromagnetic field, travelling along the interface, known as a "surface plasma polariton" (sometimes abbreviated as "plasmon").
Shown in the animation is the electric field (which is a vector quantity, hence the arrows).
#PhysicsFactlet
(Made for a student) For the single frequency oscillation of an infinite chain of identical masses connected by identical springs, the relative phase of oscillation of adjacent masses will depend non-linearly with frequency, resulting in travelling or stationary waves.
For the "diatomic chain", where two different masses alternate, the dependence of relative phase with frequency has two branches (separated by a gap of not allowed frequencies). #Physics#CondensedMatter#Visualization
Edit: The diatomic chain animation was wrong (I forgot to multiply by a prefactor which I assumed I could just set to one. I was wrong). Thanks to @narain for pestering me until I found my error! 😃
Imagine…rather picture.. no, visualize a place in your m.....
What if none of these were an option for your brain? No going to your happy place, where the flowers are in bloom and the tea is hot? No being comforted by the golden sunset on the beach, or the vista from atop the mountain in your minds eye. Yes, “I couldn't really imagine what it's like to not imagine…”
The experience of those that live with Aphantasia, can be accompanied by memory issues and difficulty remembering faces. This is not to say, that these individuals cannot retain information, or remember intricate detail. When giving descriptions, people with Aphantasian will often cite detailed facts and data, rather than using imagery. Many are likely to be introverted, as well.
Some information on Aphantasia, dates back to the1880s but, there hasn’t been a lot of attention on the subject until recent years. The brain’s cerebral cortex is thought to function differently, causing interference with mental visualization. One view on Aphantasia considers, it may only be a different way of thinking; suggesting the Neurodivergent, rather than the neurological.
With Hyperphantasia, some people experience powerful imagery generation within the mind; or being said to have “Photorealistic Imagination”.
"Typically, individuals with hyper-imagination are able to construct imagery that is beyond detailed and brightly outlined—resulting in some individuals having the capability even to experience a 360-degree vision.."
Paul Deretskiy
The contrast between Aphantasia and Hyperphantasia, is just another fascinating reflection of the human mind. The links below are definitely a rabbit hole worth exploring. It seems I may know a bit about photorealistic imagery, as well as little more about myself. Imagining what one with Aphantasia may experience, I’m at a loss...
I imagine it may feel… like “being blind in your mind”. I couldn’t imagine, “what it’s like not to imagine”.
"Brain" Artwork below by John Hain: Buy him a cup?
You cannot tile a hollow sphere with hexagons. But you can pretend.
Some games and animations pretend they can tile a sphere from the outside [ https://twitter.com/ZenoRogue/status/1439246553877729286 ] but I have not seen this done with the inside. This is the WIP HyperRogue feature of embedding 2D geometries into 3D geometries; in this case, the Euclidean world map is embedded as a (hollow) horosphere in 3D hyperbolic space. Expect more weird visualizations based on this (:
If they expand in the same 'z' direction, but with different rates instead, it looks more like a horosphere (compare the first visualization in this thread); this is why hexes in the visualization below are squished when we look at them orthogonally from far away. #mathart#noneuclidean#hyperrogue#rogueviz#mathviz#visualization
OC A spez-cial project: CEO Affirmation Blinds! Is your peripheral vision often cluttered with dumb concerns of landed gentry and other peasants? Do you yearn to leave all this noise behind and focus on what’s actually important? Look no further!
Listen to the eerie sounds of distant galaxies in breathtaking NASA video (www.space.com)
Hear the beauty of deep space thanks to the sonification of telescope data.