• 4 Posts
  • 29 Comments
Joined 1 year ago
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Cake day: July 20th, 2023

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  • Is this a general purpose WebDAV-server? I’m looking for something to use as my Zotero file storage (nearning the point I have to spend $120 for it every year), but as of now, I know nothing about WebDAV.

    Also not sure how I understand what it means that it is compatible with Nextcloud. Is it so that my Nextcloud server uses WebDAV as file storage, and I can use this to connect to that? I have kind of been thinking about ditching Nextcloud in favor of more specialized services for the stuff I use Nextcloud for (file sync, photos, calendar, contacts and cospend).



  • This is more accurate than you would think. I’ve seen people synthesize a new inorganic compound, and is then more or less forced by supervisors to test it as an intercalation host for Li- or Na-ion batteries without really having thought through whether that makes sense at all.

    Li is small, and as long as there is room for it (sites for it to sit when intercalated and paths to diffuse through the material), and there is some species that can accommodate the additional charge (as one Li+ is introduced into the material, there needs to be a charge compensation to maintain charge neutrality - typically this is a transition metal cation that is reduced from a higher oxidation state to a lower one). In that sense a lot of materials could serve as hosts, and depending on the intercalation potential, it could be used as a cathode (LiCoO2 for instance, where the intercalation potential vs. Li/Li+ is so high that it makes for a good cathode) or an anode (LTO for instance, where the intercalation potential vs. Li/Li+ is so low that it rather makes sense to pair it with a high potential cathode, and instead make for a more niche application where things such as safety is more coveted). That said, only three structure types have been widely used commercially as intercalation hosts for Li-ion batteries: layered rocksalt types (like LiCoO2 and its deriviates, NMC and NCA), spinels (LiMn2O4 or LTO) or olivines (LiFePO4, or LFP).

    Li-S is not someone randomly mixing Li with some other elements though, it has been researched for a long time and is considered one of several “holy grails”


  • In this case, C refers to the current rate, not the unit Coulomb. It is a standard way of giving the current rate in battery research, and 1C is defined, as oldfart says, as the current rate required to charge that particular battery fully (to its nominal capacity) in one hour. 2C is twice this, so it is charged in half an hour, and C/2 is half this, so it is charged in two hours.

    It is a convenient way of giving the current rate, because it allows a more application focused comparison (i.e. my EV battery or phone battery should be able to charge fully in one hour), but it hides the actual capacity of the battery (you have no way of knowing, without additional information, if the cell has a small or a large capacity).

    ETA: The last point here is what deranger and AwesomeLowlander is getting at. You can have a very small battery with very little active material, and charge that at 10C and achieve reversible cycling for many, many cycles, and it is meaningless if it cannot be scaled to a larger cell (unless we are only considering microbatteries for example). Usually, results at a small scale is not directly transferable to larger scale, and you encounter all kinds of challenges as you scale up.



  • I’ve been using a Merkur Progress for ten years now. The adjustability of the action makes it more versatile, which makes it easier to adjust to different types of blades. I use Astra Superior blades, but also have a stack of Shark blades that I at some point liked, and some Feather blades that are insanely sharp and unforgiving.

    Make sure you learn how to lather properly. A good lather makes all the difference, and it also a major factor in making it a lot more enjoyable than the canned Gillette-stuff. I use Proraso for my run-of-the-mill shaves, and have over the years bought a variety of hard soaps as well. My favorite is Marlborough from D.R. Harris.

    EDIT: I had one of those starter razors from Mühle in the beginning (Rytmo?). It snapped in two at the neck after I dropped it by accident, after 6 months use. I still have the synthetic hair brush that came with it. Some people go really into brushes, but I’ve been happy with mine.



  • The end outside of the container can have any number of means to attach a hose or pipe; like a barb, flange, thread, etc. For your application you will want a barbed bulkhead so you can just put a hose on there and don’t need to worry about the additional cost and work involved with rigid pipe.

    Ah, I’ve seen those kinds before, and that seems fairly simple. Thanks!

    As for the stain issue. The type of container you described leads me to believe it is a typical plastic storage box, almost all of those have a taper to the sides.

    Of course, now I understand what you meant! Yes, the boxes are slightly tapered, so that would be an issue.

    Tube and barbs also have the benefit of being easier to connect across a short distance and ensure a watertight connection. I would recommend putting the tube on both sides first, then installing the bulkheads in the containers to make life easier and avoid damage when trying to press the tube on the barbs after the bulkheads are installed.

    Great tips, noted! Now I’ll have to figure out where I can buy these locally.

    Thanks again for great help!


  • Thanks for a great description!

    A couple of questions:

    A bulkhead fitting should have a rubber gasket that will seal properly without additional sealant

    Since bulkhead fittings were suggested, I’ve been looking them up. The installation seems easy enough, but in all the videos I see I am stuck with a hole with threads on the outside, no one shows what comes next. What are the parts I would need for this? Do I need a join to connect the threads on the outside of each container?

    The sides of the container won’t be parallel to the ground, so a straight pipe will put strain on the container that will lead to a failure. You will probably want to use flexible hose to connect the two containers, but two 45 degree elbows at each end of ridgid pipe(so 4 total) can take the strain out once you play with the orientations.

    I didn’t really understand this. Do you mean there will be strain due to the downward force exerted by the weight of the pipe and water? I’m hoping to have the distance between the tanks as short as possible, and the diameter should also not be too big.







  • The main geopolitical change is that oil is not going to be anymore a king-maker. I would expect a second Arab Spring (though the Arab world is more than just the Arabian peninsula) with more success. I would expect a lower influence of Russia as well.

    Yes, the decline in power of the petrostates would need to be handled well, and would definitely be important in figuring out how the overall landscape looks.

    There are two possible flavors of future and really, both are credible, it depends on the stories you want to tell: more integration in supra-national entities or more independent states.

    I think perhaps both could work at the same time (which I upon rereading see that you mentioned further down!)? More autonomy to regional entities within countries, but more collaboration on larger issues inside unions such as EU and AU (it would be difficult to avoid centralized power being forced down on local communities though). Maybe instead of seeing the EU moving towards a federal state, maybe we see the US moving towards something like the EU? There are several nations in Europe that would only be mid-sized states in the US, so I always found comparing single European countries to the US makes less sense than comparing the US and EU directly.

    Also, do not forget the UN. It could consolidate in a form of government. It already has a de facto minister of trade (WTO), of labor (ILO), of health (WHO), of education (UNESCO). It is a slow process but solving the climate crisis could have given it the political credit it is currently lacking.

    Interesting, I never thought of these bodies in that light before. I think the source of the lack of political credit is largely due to the ineffectiveness of the Security Council and the veto vote. I think a big change to this would be paramount for UN to work as some kind of “world government”. And there is a fine line between such an organization being a force for good or a force for evil.


  • I’ve been doing a worldbuilding exercise for awhile, where I photobash together an image of a solarpunk scene and write some commentary about it. Maybe it’ll help? https://jacobcoffinwrites.wordpress.com/postcards-from-a-solarpunk-future/

    Cool, I’m bookmarking this! You seem to have put a lot of thought into this, so it will definitely be an interesting read.

    I tend to write with the expectation that things will get worse before they get better. I have a couple reasons for this: 1, I think there are likely some hard times ahead and I want the folks there to have optimistic fiction that makes concrete suggestions for improving things. 2, it’s a useful way to make changes in the setting.

    Yeah, I anticipate that this will be the case for me as well. I find it unlikely that we all wake up tomorrow and agree to do everything differently. Too much is at stake for too many people who are well off today. So something big needs to happen that turns a lot of things upside down. And as you say, it is useful as a literary tool: rebuilding from a destroyed state gives a lot of freedom when the new is to be defined, as inertia is taken out of the picture. Not that I don’t hope for the former being possible still…

    I tend to be a bit more concerned with day to day life, but I’ve been doing a fair bit of research, so if you find yourself looking for ideas on what a solarpunk apartment building, city street, rural homestead, or other location might look like, feel free to reach out, I’ve got tons of ideas.

    The story I have in mind is really something that could be set in a lot of different settings. It is not something that occurs because of the Solarpunk world, but merely inside it. I have a fairly clear picture of what things look like, but would always be interested to see what others have imagined. As I said, I’ve bookmarked your page, so I will make sure to reach out when the details will be chiseled out. I imagine the research for the transition from here to then will take up much time before then.