chemeng

This is really cool, I know a few different teams that have taken a look at similar approaches over the last 20 years, I hope you're able to make it work! I've been wanting something like this to succeed for a long time. Please take these questions (and assumptions) as earnest curiosity. I realize you may not be able to share answers if it touches anything proprietary.

On the chemistry side: In step 1, you say using adsorbents, so i'm guessing some combo of iron oxide to desiccant to activated carbon for the siloxanes, and then maybe ZnO (based on your likely catalyst chemistry). At typical anaerobic biogas H2S concentrations, that's quite a bit of OPEX for media I imagine, and the risk of some breakthrough poisoning your reaction catalyst. Are you only working with partners that have desulfurization in place already? And how much attention do these skids need day to day, are you expecting full-time operator presence? Remote monitoring? How are you catching breakthrough before it takes out a catalyst charge?

I'm guessing bi-reforming is partly how you tune your way out of the carbon deposition problem, but in my experience real biogas composition drifts around depending on what's going into the digester, so i'm curious how much margin you actually have on the H2O/CO2/CH4 ratio before you're back in the coking regime. Are you trimming steam in real-time based on gas composition or running fixed excess (further trading economics)? Was the bench-scale test run on a simulated dynamic biogas stream? Was there much activity decline over the run?

On the economics side: DME into cosmetics seems like a great high-margin entry point. As you point out, most methanol is produced from large centralized plants, but they have real fixed-cost advantage that a modular approach structurally doesn't (along with storage and distribution headaches from many smaller production sites). Are you assuming some customers will pay a premium for the resilience of a distributed network? How much of the methanol case is cost reduction at your expected scale versus 45Z-type credits? And you probably can't share, but I'm curious the most you can pay a producer for their biogas and still pencil relative to RNG buyers who may be bidding for the same stream?

In the US, professional certifications (PE, Bar, USMLE, CPA) exist to partially solve this problem when the certification is required to perform work legally. These are typically required in industries where lives and livelihoods of individuals and the public are at risk based on the decisions of the professional.

Joining in with some other comments on this thread, if the stamp of a certified person was required to submit/sign apps with more than 10K or 100K users and came with personal risk and potential loss of licensure, I imagine things would change quickly.

I'm personally not for introducing more gatekeeping and control over software distribution (Apple/Google already have too much power). Also not sure how you'd make it work in an international context, but would be simple to implement for US based companies if Apple/Google wanted to tackle the problem.

I think the broader issue is that we as a society don't see data exposure or bad development practices as real harm. However, exposing the addresses and personal info of people talking about potentially violent, aggressive or unsafe people seems very dangerous.

The charitable reading is that this was done as a blinded study, so the testers/researchers would not know and would prevent bias in the testing and data analysis.

There should be a way to unblind in most experiment designs though

Typically payments in the foreign currency are pegged to exchange rates, in which case you’re still paying the same amount of “value” whether in pesos or dollars.

Regardless you’d be subject to Section 988 and could potentially owe capital gains (or ordinary income) tax if you had a large enough gain from buying, holding and then exchanging the foreign currency.

The US code treats all non-USD currency as property, so you can (mostly) think of it as any other transaction with an exchange between assets. There are some nuances and exceptions of course.

It is illegal to use the previous propellant, so they can’t be manufactured anymore.

It seems that many of the cities that invested in those ideas had improvements.

However, compared to 2021, 18 metros observed an increase in walking activity in 2022, with California metros dominating nine out of the top ten spots. New York City ranked 10th

This is likely an indication of their internal targets for ARPU over the next months as they start aggressively monetizing and push to IPO.

For reference, approximate global ARPU if converted to monthly for other social networks in 2022: Pinterest: ~$0.5, Snap: ~$1, Twitter: ~$1.6, FB: ~$3.3

This says the IPO roadshow will say Reddit has potential somewhere between Twitter and Facebook, which feels like the right sales pitch to me.

If you use a TB3 dock with DisplayLink, you can use multiple external displays on a M1/M2 MBA.

Colder liquids hold more dissolved gas than warmer ones.

It’s complicated and depends heavily on the jurisdiction.

In order for it to be involuntary termination, what you’d likely need is a situation in which you have worked and not been paid for that work and the employer refusing to do so. This would create illegal or intolerable working conditions, to which you’d then need to argue is constructive dismissal.

But you should speak to a qualified employment attorney.