Viewing profile — cjlars

Why is a retracting mast preferable to a freestanding rig with, e.g. a roller furling main or a nonsuch style wishbone boom? Is there a physics reason or is this a pragmatic trade-…

A simple tree chart is a good way to understand this: https://images.app.goo.gl/2CBG9Se4vPB1jaMY9 Animals in general are only a tiny sliver of life on this planet. What most people…

>The report projected that the United States would have a cumulative total of 7.5 to 10 million metric tons of solar panel waste in 2050. This compares to 292 million tons of total…

I've been on the other side as a buyer. Although I work with 'main street' companies, not high tech, I think there's a lot of generalizable lessons. One thing to keep in mind is th…

Big difference between manually initiating the transaction and amount vs accidentally signing away everything because of one obscured line of code.

Plenty of electric scooters have no mechanical brakes and only electric braking on one hub. But since an extra couple feet of stopping power can be a life or death feature, you def…

Virtually everything besides Rolex, Patek, AP and Vacheron is in stock. For anyone on the wait-list or considering going grey market for a high demand model, I'd strongly recommend…

The headline writer kinda went off the clickbait deep end. The article doesn't event mention Reddit or social media.

There has been opposition to greenfield developments on environmental concerns, much harder to oppose a dual use installation over farmland. https://www.latimes.com/world-nation/st…

One issue with solar is where we put it all. If it turns out that a meaningful portion of farmland has an excess of solar energy, that takes a big bite out of the problem. Powering…

I was confused at first by a lot of diagrams I found online, but the wiki is pretty good. Basically think of a two way radiator. Hot air flows through air channel blades on the way…

I'm in SF. The tricky thing here is that outdoor humidity is often so high that a humidistat would only result in an 'always on' system. I think CO2 is an objectively better measur…

I think an ideal heat recovery system would probably sit mid-stream in a central air system with a built in CO2 trigger. Basically, the return air gets exhausted while heating the …

"Eating five or more fruits and vegetables a day has decreased from 42 percent to 26 percent" ... "between the period 1988-1994 and then 2001-2006." https://www.livescience.com/543…

I recently retrofit a new HVAC system and as a result have also gone on a bit of a deep dive on indoor air quality. The big thing I learned is that most homes -- even old "leaky" b…

Truly massive and sorrowful results if it holds up to review / replication. From the preprint: >Across all measures, we found cognitive scores were significantly reduced during the…

Standard advice in the nutrition community is to that most people should be substituting processed foods and meats in the diet with whole fruits, whole vegetables and whole grains …

Thirteen thousand words and no discussion of the elephant in the room: 95% of Americans don't eat enough fiber. Fiber is the bulk that keeps you full between meals and that bulk --…

Spring drive's are cool. I'll try my best fast explanation: it has an ordinary rotor and spring barrel, but replaces the escapement with a flywheel, an electromagnetic break (like …

Are these numbers comparable to OP? It's hard to reconcile that FL is at 24%, or NY at 13% w/ antibodies vs the headline.

Having spent time supporting these sorts of live / PR events, there's a non-zero chance that this was brought in last minute by an underling.

Doesn't Blue Origin use liquid hydrogen and oxygen for the launches? I get that upstream fuel generation here is often CO2 heavy, but wouldn't it be fairly straightforward to go ze…

Doesn't appear to have held up to replication. [1] >However, unlike Tsukuhara et al., we could establish only small to nonexistent associations between cognitive ability and pupil …