Nebulizer

Oh neat, I actually know a lot about hydrogen-natural gas blends!

I read the report because of this claim:

And now, a team of British researchers has found adding hydrogen to natural gas actually increases how much natural gas leaks from stove burners and boilers because the smaller hydrogen molecules help the larger methane ones escape.

I've never heard of small hydrogen molecules helping larger molecules leak. I was curious what the mechanism for this was. It turns out the report does not make that claim at all. In fact, the report claims the additional leakage from hydrogen blends is most likely just the hydrogen leaking. I didn't run the numbers myself but the data presented seems approximately aligned with that. Hydrogen leaking through fittings is already a well-known and established challenge of blending hydrogen with natural gas. So the central thesis of this news article is completely fabricated.

I am a little surprised the utility companies are going to soon be mixing in hydrogen. I didn't think we we're quite ready to blend in hydrogen into natural gas for the leakage reason, and also because of production scaling issues that we haven't resolved yet. These challenges are likely within reach soon. For example, the United States department of energy has a large research initiative right now to help lower the cost of hydrogen production to be more competitive with natural gas. We also need to make sure that hydrogen is produced in a carbon-free or carbon neutral way, which is probably going to be dependent upon our electrical grid becoming carbon free.

The missing middle. The last city I lived in had a bunch of houses in the 1200sqft 2br/1ba range but they were built before 1950 and are now in the "historic" part of town that is zoned to prevent redevelopment. It's also the closest to the city center where many jobs are located and events like festivals take place. So it's a very desirable place to live and houses here sell for $1M+.

The next ring out from the historic district was built between the 50s and early 2000s and is largely 2000+sqft homes on larger plots of land. Large plots of land are desirable so those go for $800k+.

After the 2008 financial crisis we started building our third ring of housing with humongous "luxury" houses with 6+br. They're on tiny plots of land with maybe 6ft separating the houses, but since they have large sqft, granite countertops, and faux marble tiles in the bathroom they go for $700k+.

Oh yeah and housing has been underbuilt since the 1970s so the vacancy rate is under 1%, and it's a smaller city (~200,000 people) so the job opportunities aren't plentiful and the best paying. I have no idea how so many of these houses are being paid for. I bet a lot of people that have bought since 2010 are house poor. Or a lot of them are cruising on super low interest rates.

I've been using SALOME to create parametric 3D geometry. My use case is to parameterize my geometry features and export to STL files that I use with OpenFOAM. SALOME is integrated with a couple of grid generators, and I really like it's 2D/triangulation/STL integration with netgen. You can specify faces for refinement to a desired mesh size, so for example around complex features you can create a fine STL mesh and on simple shapes you can have a really coarse mesh.

I've found the 3D modeling to be pretty straightforward, and SALOME usually does a pretty good job if you have to go back and modify previous features (something I've struggled with in FreeCAD).

I've also used FreeCAD for mesh generation, and it works ok but I've found the triangulation leaves a lot to be desired for splitting up the mesh as needed for OpenFOAM boundaries.

If you're making STL files for 3D printing and you want a parametric CAD modeler for engineering parts, give it a try. If you want complex faces with artistic style, I would suggest Blender.

I would also recommend checking out SALOME for 3D modeling. I've been using the shaper toolbox to create geometry for fluid simulations and it's worked well for me. The shaper toolbox is parametric (as opposed to SALOME's geometry toolbox which is not).

After you've created your geometry in shaper you switch to the mesh toolbox to create your stl file. I think there's really good control over the triangle creations with SALOME. For example, you can specify edges and faces you want smaller triangles in (like around tight geometries, holes, etc). I've been able to get much higher quality stl files with this method than with freecad.

SALOME is free and open source software.

I haven't read that one yet. I'll have to check it out soon!

I had heard that colour of magic was hard to start with, which is why I went with guards guards and mort. I just love the characterization of ankh morpork. I've been mixing other books in-between so I don't burn out on Pratchett's writing style, and it's been good.

I'm finally getting into both discworld and culture. I've read a number of other discworld books before, two of the night watch, mort, I think another I don't recall right now. Now I'm reading The Colour or Magic. It's enjoyable but I'm finding I'm going a little slower on it than the others.

I also have the second culture book, Player of Games, ready to go when I finish the discworld book. I really liked how bonkers Consider Phlebas was (felt like a constant stream of chaos for the crew).

I recently read and really enjoyed Psalm for the Wild Built by Becky Chambers. The book is more of a solarpunk future with a heavy focus on the characters. It's pretty short too! All takes place on a single planet, felt very grounded after I just finished with a Culture book.

I've had a couple jobs with RHEL workstations, and the university I went to had RHEL workstations too. Not sure what their market share is compared to canonical, but they definitely have a bunch of deployments on desktop.

Recently I used SALOME for doing CAD. The Shaper work bench has parametric modeling with the sketches that you extrude or cut from. I found it powerful and easy enough to use that I replaced my freecad workflow with it. The big thing that sold me over freecad was the simplicity of creating more complex triangulations for stl export, and easily grouping faces for export into different files.

I haven't tried any complex surface creation, I wouldn't be surprised if it falls short in that regard. I guess feature wise it probably doesn't have everything freecad or fusion 360 has, but I found it works great for my needs. Great for 3d printing and geometry creation for CFD simulations.

I've been going super early in the morning. I'm doing pretty good keeping pace and mileage goals. I'm just no fun for my friends anymore, no drinks and in bed by 9!

There were a lot of lemmy issues recently. Have you tried removing your account and logging in again? That fixed things for me.