>An average level of 30.7 ng/mL generally means those people must have consumed marijuana at some time close to driving.
Averages do not work that way! The average of 48, 48, 48, 3 and 3 is 30. The study findings remain interesting but the actual proportion of impaired drivers may be less than 40%.
I think there are basically two kinds of micromanagement that need to be distinguished. The first one is encouraging your child to do something which you think has direct benefits, like learning to swim, which is good exercise and prevents drowning. The second is encouraging your kid to do something because you expect indirect social benefits: either some admissions officer will be impressed by an applicant who plays the oboe or the child will socialize with "the right crowd" or something like that. It's the second kind that can become pernicious because it creates an opportunity for the parent's own status anxieties and prejudices to be projected onto the child, like "lacrosse players are smarter than basketball players" so you want the kid to play lacrosse and not basketball even though they are basically comparable activities and this is dismissive of the needs and capabilities of children to learn to navigate social environments and pressures for themselves.
Sanctions, including an attempted blockade [1] of oil exports, imposed by the British Empire, still in existence at the time, in response to a dispute over the ownership of Iranian oil fields, which were a primary factor in the fall of Mossadegh. See e.g.:
It should be noted that while the Shah obviously benefited from the coup, he remained suspicious of the Western powers who had supported it; he was not foolish enough to believe they were honest allies. Consequently, he was inclined to support attempts at autarky.
>So you want to create a completely new industry. From the ground. With all existing experts having retired. Demanding high quality, no-fault tolerance production. Dependent on resources not found in Europe.
You could say most of the same things about batteries. There is a little lithium in Europe. But Europe doesn't have a battery industry. It's in China. And you could buy batteries from China, but we aren't doing that and the political trends don't support more energy dependence on China. You could also buy nuclear reactors from China, but of course Europe doesn't want to do that either.
What they are proposing is that Europe is going to pivot from not making batteries to not building nuclear plants. They will, however, write lots of papers about the reactors (neé batteries) they would like to build, if only the prevailing wage or regulatory regime or other economic excuse du jour wasn't stopping them.
It has increasingly become my impression after watching these debates unfold that the core technology is not the real problem. The problem is a lack of political will to encourage the growth of new industries in green energy, failing both at regulatory and industrial policy. Solar is succeeding, not because it is the best form of energy (though it is) but because it is mostly paid for and installed by individuals and small businesses (with a little capital you can own your own solar farm!).
Sweden had a major company try to make lithium batteries but it was not economical viable without major and continuously infusion of government subsidies. The company Northvolt is the largest bankruptcy in modern Swedish industrial history.
>The deal with BMW was cancelled in June 2024 because of Northvolt not being able to deliver on time. [Wikipedia]
Certainly this is some kind of failure. But this is Hacker News. Surely we can appreciate that you can't just blame the core technology when a company fails. History is full of companies that failed. Japan and the USA have battery companies despite high wages. There is something to be learned here, but I don't have the determination to figure out exactly what it is.
We should definitively attribute some blame to the company and those who ran it. It is very similar to the nuclear projects in UK and Finland that went over budget and got delayed, except that those at least did finish and are predicted to create profit in the near future. Northvolt ended with nothing to show, and all the government subsidies it already received just went into the ether.
> The problem is a lack of political will to encourage the growth of new industries in green energy, failing both at regulatory and industrial policy
100% this, no doubt about it. There is a collective lack of investment into the future and I'd say we are witnessing managed decay more than anything else.
>This seems to be trying to say that we can't make aluminum without copper, but that seems nonsensical.
The far better argument is that, if it were simple to replace copper with aluminum, this would create a ceiling on the price of copper. However, this hasn't happened. Many applications of copper can theoretically be replaced by copper, but in practice the reactivity and thermal performance issues of aluminum can be challenging. Aluminum wiring in homes, for example, has a very bad reputation.
This isn't fatal, but it is a problem. And if society doesn't plan for it, it could become a more painful problem.
> Aluminum wiring in homes, for example, has a very bad reputation.
It has an undeserved bad reputation now, but it deserved the bad rep back in the 60s and 70s. The problem wasn’t solely the aluminum conductors themselves, it was also the terminals on wiring devices. The material the terminals and screws were made out of worked fine with copper, but the thermal expansion profile did not work well with aluminum conductors. That caused arcing and fires, so the wiring device manufacturers figured out a material that works well with both copper and aluminum for wiring device terminations. Wire manufacturers also made changes to ensure better terminations. If you look at the terminals of a light switch or receptacle, it will say Cu/Al on it, signifying it is suitable for use with either type of conductor.
This was solved 50 years ago, it’s similar to being scared of flying on a modern jetliner
because the De Havilland Comet ripped itself apart in the 1950s due to the engineers not understanding the stresses from repeat pressurization cycles.
For existing installations of pre-1972 wire, you can buy splicing devices (similar to a WAGO lever nut) that connect to the aluminum conductors inside the box and allow you to connect a copper pigtail to the wiring device, you also have to use an anti-oxidant grease to prevent oxidation.
That being said, I’d still wire a house with copper because you can use #14 Cu for a 15A circuit but you need #12 Al for the same circuit, the NEC does not allow use of #14 Al romex.
> In North American residential construction, aluminum wire was used for wiring entire houses for a short time from the 1960s to the mid-1970s during a period of high copper prices. Electrical devices (outlets, switches, lighting, fans, etc.) at the time were not designed with the particular properties of the aluminum wire being used in mind, and there were some issues related to the properties of the wire itself, making the installations with aluminum wire much more susceptible to problems. Revised manufacturing standards for both the wire and the devices were developed to reduce the problems. Existing homes with this older aluminum wiring used in branch circuits present a potential fire hazard.
I live in a home built after 2000 that had aluminum wires run to its heat pump. A few years back coolant leak from the heat pump lead to huge electric usage before the aluminum wiring lit on fire and shorted itself out. Since repaired, but was told at the time original installer didn't correctly do the aluminum grease on the exposed wire parts.
That said I think the wiring there is still thick aluminum.
Not sure I really have a point - all things equal I'd prefer copper, but it seems like aluminum can be fine when done right too - just riskier when done to the quick and dirty homebuilder standard.
Depends on the current fuel-to-payload ratio of the diesel ships. If it's 3% and batteries would push it to 10%, it's not a huge problem. But if it's 15% and batteries would push it to 50% you're losing a lot of capacity.
Not quite. The difference in energy density is way more than that.
However, most large ships apparently have multiple times more fuel capacity than is required for 5,000km of range, which is what makes the electric version realistic.
My last two televisions both came from the "Sceptre" line at Walmart which seemed to be the last holdout of non-smart TVs. I don't know if they're still holding the line; the model I checked just now says it has "V-chip" but doesn't say anything about a "smart TV" operating system or any of that nonsense. It's not very well-advertised but it's still around. I don't know of any way to find a normal TV that isn't from Walmart or a thrift store, though.
There are still a number of TVs marketed towards hotels who don't want their guests being able to mess with complex states that smart TVs provide. They tend to be a bit behind on the tech side tho.
Is this still accurate? Wikipedia says that Newsweek was acquired by IBT Media (a front for a religious movement) in 2013 but returned to independent ownership under Dev Pragad and Jonathan Davis in 2018 following a criminal investigation into embezzlement. I was not able to confirm or reject any links still existing between Newsweek and its current owners and IBT Media.
It does appear that the new owners are very much leaning into a "new media" business model and the old journalistic staff is probably gone.
Dev Pragad was involved with the IBT ownership of Newsweek. The whole thing is a mess. Cards on the table, I'm throwing an elbow with the "religious cult" thing; the cult has not much to do with why you should be careful with Newsweek. Rather, it's that Newsweek as it exists today has nothing to do with Newsweek as people understand it. Whoever owns it, it's basically an actual clickbait farm now.
Averages do not work that way! The average of 48, 48, 48, 3 and 3 is 30. The study findings remain interesting but the actual proportion of impaired drivers may be less than 40%.
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