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?

Yes, the mechanism is effectively EAR/FDPR and you can check (https://en.wikipedia.org/wiki/Extreme_ultraviolet_lithograph...) for more detailed history, but the EUV technology ASML further developed and commercialized (no small feat) was licensed from a US Govt created consortium by which the government maintains their IP rights.

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.

Swyer syndrome being the representative example of this for those looking for more info.

(https://en.m.wikipedia.org/wiki/XY_gonadal_dysgenesis)

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

I was also skeptical, seems there’s a lot more to this story. Not that they didn’t disappear and reappear, but the spread of them isn’t as straightforward as we thought.

https://www.smithsonianmag.com/smart-news/native-americans-s...

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.

For most illnesses, you are correct, reducing a fever is unnecessary. However infants and toddlers are at risk for febrile seizures should their temperature increase too high, too quickly. In those scenarios (fast rising temp) there is considerable medical benefit to intervention.

If you’ve done all the standard stuff, clapping out beats, playing drums, etc and it’s not clicking. The best tool I’ve ever found is dance. Try to get him to learn how to move his body in time to music. Doesn’t matter what he’s doing or what kind of dance. Rhythm is something you feel.

Always felt bad when replacing these old control rooms, there is a certain beauty and elegance to their design that is missing in modern HMIs.

This sort of color coding is common in industrial settings and definitely was on panelboards of the era. It would be really interesting if the color coding seen here in any way aligns with ANSI/ASME A13.1.

Atrazine, cyanazine, trifluralin come to mind

Getting around 4 minutes per image on M1 MacBook Air 16GB

I think average US household water usage is around 250-500 gallons per day. So 326k gal per year for 2 households isn’t that far off.

There are working fluids (molten salts, liquid metals, etc) that can work in this regime, typically with ceramic piping systems (usually ceramic lined nickel alloy steels) with all ceramic/graphite pumping systems. That said, it’s used in very niche applications and hard to maintain at the scale required for a CSP plant.

If you’re after heat, it would be much simpler to just use the steam. Use it as is, as we have for centuries now, or you could transfer it to a higher thermal capacity oil, and if you want some energy, divert it to a steam turbine.

For cement you could presumably use the heat as a preheater, or use the energy for an arc furnace.

In this case, congress is not limited. There is a clear way out, the state buys out the bond holders and eliminates the debt. They just can’t dissolve the district without addressing the debt. The cost to do this is said to be 1B. And given the many more billions Disney has poured into the infrastructure and the fact it will continue to use the municipal utilities providing a cash stream, it doesn’t seem unrealistic or unfair to me. (Not to mention the massive tourism benefit this deal has provided to the state)

The issue seems to be that there is not enough political will to use 1B of Florida’s budget to make this happen, not that there is any prohibition on them doing so.

The categorization is 0 minutes, 1-20, >20 minutes per week. The latter with an IQR of 10-45mins per week.

I’m not saying it’s a great study, but please at least skim the study before being so dismissive and slightly misleading in the comments.

You also don't need perfect accuracy for something that is a weapon of last resort with a 1km blast radius and 500,000 km^2 fallout radius.

I have thought that selection for "giftedness" in young children is multi-factored with a combination of "exposure" and innate aptitude and curiosity of the child at the very least.

If you take "exposure" to mean the child has been introduced to a multitude of concepts and experiences both at their age-appropriate levels and grades above, the conjectured distribution starts to make sense. Wealthy children or those of highly educated parents tend to have incredibly high "exposure" increasing their representation in gifted programs. Those not from such a background will necessarily need to be highly curious and/or have high innate aptitude.

For the lower grades, gifted kids regardless of background will be in the upper decile of scores. As they grow older and "exposure" differences across the entire population minimize, those who were gifted only due to "exposure" will fall to the middle of the curve. Those with high curiosity/aptitude will continue to be in the upper decile, with those who had early and continued high exposure (usually a result of wealth or parent motivation) in the top percentile.

To your point, if you believe the goal should be to meet children where they are and advance them, this model isn't horrible. What it does point out is that there may be a fair amount of top percentile talent that is unrealized due to lack of "exposure" and resources.

Has it? It’s pretty much been a gold-backed currency making gold the defacto reserve currency. Curious whether the USD has been the only fiat reserve currency.

Depends on the severity of the condition, but if swallow is affected I believe aspiration, pneumonia, choking, are causes of premature death for CP.

Looks like they were predicting that in the beginning of 2021, though for 1H2021, US was still a net exporter. Don’t think they will be for 2022.

https://www.eia.gov/todayinenergy/detail.php?id=49596

By “we” I assume you mean the USA. Which is a net exporter of oil and the largest oil producer as of 2021. It also receives almost no imports from Russia, and will increase exports to EU at current high prices. Russian oil restriction plays to US energy strengths but the US won’t move unilaterally without EU support due to their dependence.

The US relies primarily on the Aegis system for ICBM defense, which uses the SM-3 capable of Mach 10+.

https://en.wikipedia.org/wiki/RIM-161_Standard_Missile_3

Pro-rata rights prevent this, but it's an interesting question of whether it would be illegal.