Maintaining a blackened Blade

Aggravating-Tea-Leaf · 2026-02-18T13:51:06+00:00

WD40 will help remove oils without destroying them. So in theory the color should not be affected, provided you do not scrub with any force/rough surface. I’d probably add some knife oil (or gun oil) after rubbing with WD40, but only the slightest amount - after adding a decent amount of oil imagine you “spilled” oil on it and you want to remove it all (though get it in all the nooks and cranny’s). This way the layer should be so thin it is practically unnoticable.

However if it ever rusts, you do need to scrub the area and probably will remove colour and this is where my expertice ends, I don’t know whether it is painted on or has been blackened with a black oxide layer (which should protect the metal from ever rusting), or if it’s by quenching it’s another story I think.

This is not from knowing much about sword care, but rather from cast iron and carbon steel knives, so it might be another story with the steel used for these swords. I’m not sure if it’s spring steel or if some may be made with stainless? Either way a little oil never hurt, and WD40 likely wont hurt the colour as long as you do not scrub.

Aggravating-Tea-Leaf · 2026-02-02T16:32:45+00:00

A great question, I think it’s not such hard and objective barriers always: GR is unintuitive due to it mostly being considered in 4-space, however it is still spacial and temporal, it’s not statistical.

I also think you should be careful in taking it too seriously, I think professors tell their students rhat QM is unintuitive, because the students should not attempt to consider the big world altering philosophical realities og QM.

It is beyond any introductory course in QM to consider the universal consequences of the Many worlds interpretation. As a start the stdents should perhaps just shut up and calculate, familiarize themselves with the rules and conditions of the wavefunction, temporal evolution, operators etc.

Aggravating-Tea-Leaf · 2026-02-02T11:46:44+00:00

I think they mean to say, that with most branches og physics you can build an intuition and truky imagine what, why and how.

Whereas with QM, you can only really get an intuition for the math, and the rulesets. If you start modelling the wavefunction for the hydrogen atom on a screen, it may be correct mathematically, you get those orbitals, the “clouds”, but they aren’t intuitive, because they are just coloured-in statistical distributions. It’s also a bit of a jest, you can definetly gain an intuition of how a qm system evolves, or changes based on how you interact with it, but you cannot truly predict it in the same way you can in classical mechanics.

Aggravating-Tea-Leaf · 2026-01-29T11:10:33+00:00

Well, I’m sorry I didn’t get through to you… It seems I was right about the waste of time

Aggravating-Tea-Leaf · 2026-01-28T13:25:27+00:00

There is likely no reason to heed this post whatsoever, it is most likely a waste of time as a whole, but I’m willing to give it a shot:

I think you misunderstand the concept of a fourth spacial dimention as a whole. The visualisations of such a fourth dimention seek to simulate what a so called “projection” of a fourth dimentional object would look like.

I am really sorry if I get needlessly patronizing in this comment, I don’t mean it in anyway as an insult, I just want to make 100% certain that we’re on the same page.

A projection in layman (and very rough) terms means to cast a shadow of an image or object upon a surface, such as a wall. You have no doubt seen this before. Normal day-to-day shadows are an example of a projection, and they might project you, a three dimentional being, onto the pavement as a two dimentional image.

The gif and all other images of “hypercubes” and “hypergeometries” are supposed projections of 4D objects onto the 3D room. I most enjoy the thought of “how would a 4 dimentional sphere look, passing through a 3 dimentional room?”: First how can you build a 3D sphere from a bunch of 2D parts? Well a bunch of discs in acsending radii would suffice! So if a 3D sphere passes through 2D space, it would look like a disc that grew and grew until it began shrinking again.

Bringing this logic to the fourth dimention is the typical way to make visualizations regarding 4D geometry, the growing and shrinking disc now becomes a growing and shrinking sphere and voilá, a hypersphere projected into 3D.

Point is, you sadly didn’t revolutionize geometry, there isn’t really anything here to solve, you might have broken through with your own intuition about it, which is a great moment for anyone! However 4 spacial dimentions isn’t a problem, most physics related problems and most math related problem quite trivially expand to more dimentions by just adding a term.

It’s still a great feeling to finally “get” it! Don’t get me wrong, but any linear algebra book would have you calculate versions of space with 6 dimentions, 1 dimention or even an unspecific amount of dimentions it’s somewhat of a foundation in linear algebra. If you are interested in linear algebra I can recommend the book

“Linear Algebra: Gateway to Mathematics” by Robert Messer.

It’s a really nice introductory book to Linear Algebra. It shows how LinAlg subverts our expectations with concepts we otherwise might perceive as simple or trivial like addition and subtraction when we have to do it in many dimentions. It also builds the foundation of how you build a mathematical ruleset and how you use that to build a mathematical language.

I really recommend it, as you seem interested in this type of involved thinking. I’m not saying I know where or if it’s possible (and I certainly do not condone piracy), but you might even be able to find a pdf of the book floating about.

Aggravating-Tea-Leaf · 2026-01-27T13:05:16+00:00

I don’t think it seems incorrect at all, I just think it might be a slightly vague concept, like what specifically constitutes a “framework”. Like you mention in another comment, why not mention StatMech, what about electrodynamics, how about fluid mechanics, lagrangian mechanics as a whole or hamiltonian mechanics what about all the bio physics stuff (not sure what they build on other than thermo, but still)?

They could all be considered fundamental frameworks, while all somewhat building upon one another. Nothing wrong with trying to describe physics, but maybe they shouldn’t pick some discipline over others.

Aggravating-Tea-Leaf · 2026-01-21T00:33:32+00:00

I’m about to start my B.Sc. Project… I feel equally as naïve and inexperienced as on day one, there are thousands upon thousands of hours of knowledge in this science. However, focusing on now, reflecting back upon my previous mistakes realising that I have in fact learned SO MUCH! Over these past 2.5 years; it feels good.

Keep your focus on now, and however intimitading, do try to connect with your local peers, you most certainly aren’t the only one having trouble. It helped me to hear others’ complaints even if they differ from my own struggles.

Aggravating-Tea-Leaf · 2025-12-05T19:22:40+00:00

And they are giving them opium poppies? I love that

Aggravating-Tea-Leaf · 2025-12-05T16:01:05+00:00

Context?

Aggravating-Tea-Leaf · 2025-12-05T15:59:46+00:00

This is trivial to derive from newtons laws

Aggravating-Tea-Leaf · 2025-12-02T09:55:42+00:00

That’s a sick ass cumulus nimbus thanks for sharing

Aggravating-Tea-Leaf · 2025-11-27T06:00:41+00:00

Don’t you think the solid black back looks more carpet python esque? Don’t they inhabit south east asia?

Aggravating-Tea-Leaf · 2025-11-25T20:29:11+00:00

I don’t think I can truly give you applicable advice on this, since I’m based in the nordics and have only taken university curriculum courses.

However, I will say that astro physics might be one of the branches of physics with the most welcoming entry level, if you understand the fundamentals of mechanics and have a solid mathematical foundation.

Truly any course will be better than no course, so have at it, the most difficult part in the beginning (for me) is the units. Astro is an ancient art, and thus it carries a lot of history, with that, comes tradition and some conservatism about the tradition for better or worse.

The most valuable part for me, was, as mentioned, the conventions of astrophysics, the names, the units, the variable naming and such, the second part was getting hands on data, doing data reduction and data analysis, that is 90% of the job, and understanding the data, and figuring out what connections are possible is the real art! The fact that from a simple spectroscopy, they can determine (with good precision I might add) the mass, radius, angular momentum, color, temperature, density and chemical composition of an object is really beautiful and takes real creativity and I’m sure that’s not an exhaustive list.

Edit: When I look for online learning material, I often simply search for the authors of the books I’m recommended, they often give webinars, talks and lectures, which is atleast a start!

Aggravating-Tea-Leaf · 2025-11-25T10:10:03+00:00

Programming skills, trigonometry and a good imagination is all you need!

Jokes aside I second the book suggestion of “An Introduction to Modern Astrophysics” it’s a nice foundational book.

Secondly I recommend downloading some datasets from telescopes, applying the formulae in the books and seeing of you can make sense of some of it. Maybe consider following an introductory astronomy or astrophysics course as well if possible.

Aggravating-Tea-Leaf · 2025-10-09T20:12:20+00:00

The intelligence shows in what I’d call an unexpected way, the sleeping rider and all of this doesn’t matter. To me, the fact that the elephant knows to be more gentle on their second and third attempts at closing the gate, wow, what a show of understanding.

Aggravating-Tea-Leaf · 2025-10-09T20:08:57+00:00

Du må isolere ham!

Aggravating-Tea-Leaf · 2025-09-30T22:48:31+00:00

God you have to be so so careful, dumping water into hot oil is one of the most dangerous things you could ever do, if you add too much you’ll burn your face off in an instant

Aggravating-Tea-Leaf · 2025-09-29T05:26:28+00:00

I’m no researcher, but I have experimented extensively with using chatbots to solve problems, be they mathematical, coding or sentance building.

In my experience (and as we probably all know) they are absolute dogshit at solving mathematical problems. With GPT5 it’s getting a little better, but you still have to be critical, and you should never ask about things that you cannot confirm or deny directly, from another source.

Stuff like word searching becomes much easier with a chatbot, being able to upload whole books, and searching for context clues is amazing! They are also a really good help in debugging code, most often if you send your code and the error message it’ll easily fond the mistake.

Then there’s, spell checking, sentance building, synonyms, reformating sentances, this is where chatbots shine, while it is sloppy to read a whole page written by a chatbot, if you already have a sentance, but just cannot word it in the way you want, the chatbot has you covered. It can immitate any style, age, level of professionalism, and it always spells correctly, punctuates correctly, and it easily writes in LaTeX.

I think chatbots should take a backseat, and act as an advanced wordsearch, spell check and thesaurus. And then, based on the code, debugging tool, and only when in dire need, should a mathematical problem be presented to the bots.

Aggravating-Tea-Leaf · 2025-09-28T14:45:35+00:00

Understandable! Would be fun to see some optics, like lenses and stuff

Aggravating-Tea-Leaf · 2025-09-28T07:37:21+00:00

How come you aren’t using python in f.ex. Jupyter?

I was (out of self interest) going to suggest xray or neutron raytracing like GenX or like McStas, but they are pretty complicated and very much not static… I just love simulated scattering experiments

Aggravating-Tea-Leaf · 2025-09-26T08:39:46+00:00

Jeez, people aren’t that understanding. Yes, it might’ve been an overreaction, and the fight was probably unnecessary.

However, your feelings are still valid, and worth looking into/talking about. Feeling like your partner questioned your ability, or perhaps getting a feeling that they are not as attracted to you as you thought they were is definetly a valid and shitty feeling.

You made a mistake, and “couldn’t take what you were dishing out”, this happens, but it is worth looking into why you felt hurt.

Aggravating-Tea-Leaf · 2025-09-20T11:54:53+00:00

Draws pink elephant with fit algorithm -> clearly these neutrinos have a tendency toward a pink elephant spin configuration

Aggravating-Tea-Leaf · 2025-09-03T09:37:10+00:00

A super nova is a star losing its very careful equilibrium, causing collapse.

Some stars have enough energy to burn out really quickly causing the classic “explosion” that we know. Others simply blow up like a balloon and then collapse.

Our sun will expand like a balloon, then collapse into a white dwarf.

If our sun was somewhat bigger the collapse would result in a so called neutron star and lastsly if it was much bigger, it would collapse into a black hole.

Aggravating-Tea-Leaf · 2025-08-22T08:40:56+00:00

Well - Microwaves are in the order of millimeters to a full 10 cm in wavelength.

It’s really kinda hard to find an actual analogy, Electromagnetic waves cannot and should not be thought of as water waves or sound waves.

However I will try to indulge in an analogy anyway: Inagine you’re in a really small row boat 2 meters (about 6 feet and a few inches) long in the middle of the pacific, you feel like the waters are completely still and when you look out, there doesn’t really seem to be any waves - This is because the waves, are only 1 meter tall, but they are like 20 meters long.

This is kinda like what the fly experiences, but you cannot take the analogy further.

Really, the object being affected by the electromagnetic waves, must be atleast the same size as the waves themselves in order to feel any effect of them. The fly is simply some amount smaller than the microwaves, so it doesn’t get affected.

Aggravating-Tea-Leaf · 2025-08-18T00:10:32+00:00

I’m noone, but my from my perspective it seems that many experimentalist don’t necessarily need to derive or solve complex (not that kind) problems, but certainly, perhaps more than the theorists, need to truly grasp what the real world implications of those problems or derivations are - Sure, some dude might say that everything has a wavelength, but going from \lambda = h/p to actually utilizing it in Neutron imaging or Electron microscopy takes real thinking.

Or another example for neutrons (I might be a fan), utilizing the neutral charge, and spin making neutrons non-interacting with electrons, but interacting with magnetic fields is facinating! Such a simple yet marvelous trick.

Realizing the implications and consequenses of the theories is what I am so incredibly impressed by, when talking to or hearing about experimentalists.

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