jseutter

8 ms·

31.
by jseutter 4y ago
You have the math right, but the product wrong. They are looking for specific types of steel that are currently unavailable at almost any price. Their order size is too small to warrant returning a phone call from normal steel producers.
32.
by jseutter 4y ago
It's notable because it's practically a brand new bridge - only 10 years into its 100 year life span. Bridges that fail are typically much further into their projected life spans, and the ones that aren't make headlines (lik
33.
by jseutter 4y ago
A similar thing happened in south Texas - the land that Big Bend state park now occupies was grassland in the 1880s but because it featured low rainfall, was quickly overgrazed. The owners ended up giving the land to the state because it h
34.
by jseutter 4y ago
The wikipedia page mentions it - the prevailing winds are west-to-east across much of the US and Canada due to the jet stream. In the winter the jet stream also moves further south. It mentions some of what must have been epic multi-day d
35.
by jseutter 4y ago
It's interesting to see how long some ideas take to gain a foothold. I remember reading about zero-till farming in the late 1980s and how it improved yields, decreased erosion and saved on fuel. Fast forward to present day and one of
36.
by jseutter 4y ago
In my city they use organisms to process wastewater and the smell is quite remarkable. There is one section right at the beginning that smells like sewage, but the rest of the processing plant smells like freshly turned dirt in your garden
37.
by jseutter 4y ago
A groups of substances that are useful to give plastics certain qualities. They are currently unregulated, and, due to their small size, found pretty much everywhere, including in our bloodstream. Several of them are "forever" su
38.
by jseutter 4y ago
The payback period has been dropping over time and is now under a year, in some cases well under a year. This depends on many things including where it is placed, size of the tower and time of year. Links to articles that reference the stu
39.
by jseutter 4y ago
I used them to implement an arbitrary precision math library for an embedded processor that needed to do some precise calculation in an autonomous environment. The embedded processor had no floating point capabilities. The book showed me t
40.
by jseutter 4y ago
I think you meant precipitation hardening. The article mentions that they can 3d print material that has a similar structure to 17-4 PH steel, with similar strength properties. They aren't specifically heat treating while printing, t
41.
by jseutter 4y ago
As far as has ever been discovered - no, this won't work. You can think of a fan as just a prop enclosed in a housing (jet engine). A prop loses effectiveness at the speed of sound because the air passing the prop gets a high pressur
42.
by jseutter 4y ago
Correct. The mantle is on average about 35km thick. Most (all?) oil wells are less than 5km deep, so this is roughly an order of magnitude deeper. The world's deepest borehole https://en.wikipedia.org/wiki/Kola_
43.
by jseutter 4y ago
I tend to experience this as well. For some reason HN on the weekends has way more interesting and varied topics. The weekday crowd either comes here for more mundane topics, or marketers flood the submission queue, I can't tell whic
44.
by jseutter 4y ago
The prototype of their vehicle had about 700 watts of solar and provided about 40 miles/day of range. If the panels get roughly 6 hours of full insolation per day they're using about 100wh/mile. It's impressive, but on
45.
by jseutter 4y ago
I commuted by bike during winter and found that I could handle temperatures down to -12C. Below that I couldn't keep my toes and fingers warm with mittens and booties. I had to trade off between adding layers to my legs and arms and
46.
by jseutter 4y ago
I agree with your assessment. I have one merino wool shirt, but I save it for occasions when I need the light weight and good warmth. For regular wear I stick to mostly cotton. I can't afford multiple merino shirts. Other types of w
47.
by jseutter 4y ago
Getting Ecstasy to market involves fewer regulatory hurdles than even drugs for animals. It just so happens to be illegal in most countries. I thought he'd be doing "this drug is for cats" wink wink and then people use i
48.
by jseutter 4y ago
Good points. This design seems quite similar to the pebble bed reactor idea in that it relies on the fissile material being encased in a graphite mixture (stubby cylinders instead of spheres) as well as heat transfer using helium instead o
49.
by jseutter 4y ago
Yes, a factor of 5 is fairly close. The prices of panels and inverters has dropped, while the price of labor and wiring has stayed constant or increased. The end result is the factor of 5 that you mention, and DIY systems are becoming mor
50.
by jseutter 4y ago
I had this same thought at one point and eventually learned of heat pumps. Heat pumps move heat from one spot to another, ie from outside your house to inside your house, or the other way. The point is, they move more energy than they con
51.
by jseutter 5y ago
Li-Ion has dropped in price to the point where it is cheaper than lead-acid. To come up with a realistic lifetime cost you have to factor in: - Cycle count (lead-acid ~500, li-ion 1000-3000) - Usable capacity (lead-acid 50%, li-ion 80%) -
52.
by jseutter 5y ago
I think they're talking about the accesibility filters: https://9to5mac.com/2016/03/18/how-to-reduce-iphone-screen-b... I used to use it daily just before going to sleep, but then found the app I read wi
53.
by jseutter 5y ago
Chrome on m1 mac - laggy and frustrating in a bad way Safari on m1 mac - no lag and frustratingly fun :)
54.
by jseutter 5y ago
That 450 miles will also use up the electricity stored in the 60kWh battery. So you'd get one day to travel 450 miles and then either have to plug in to charge, or use the solar panels to regain range. They mention being able to gain
55.
by jseutter 5y ago
Good question. The central pole acts like a kind of skewer. It keeps the hay from sliding off the top and falling over. As to the height of it, having something to keep your balance on top of the stack is essential. One of the photos sh
56.
by jseutter 5y ago
300 bar air.. Are you filling scuba tanks? The wet air question is an interesting one. It seems like the compressed air would have more moisture in it than a piston-driven compressor, but at the same time having oil-contaminated air is pro
57.
by jseutter 5y ago
It depends where you want to set the goalposts for a major phenomenon. Linus moved to the US in 1997 to work for Transmeta, while Linux hit 1.0 in 1994, and Red Hat got its start in 1993. The dot com boom was in full swing in 1999 when Re
58.
by jseutter 6y ago
Nitrogen wouldn't work in this situation. In fact nitrogen and aluminum will burn, forming AlN. Normally this doesn't happen because of Aluminum readily forms a "rust" layer in the presence of oxygen, and there isn&#x2
59.
by jseutter 6y ago
SV Delos has a great video on power generation methods https://www.youtube.com/watch?v=Osh1ljtgnSU . It is a larger boat (58ft?) that is lived on full time and they use a combination of solar, wind and fossil fuel for ener
60.
by jseutter 6y ago
The "pipeline bubbles" remark refers to the decoding unit of a processor needing to insert no-ops into the stream of a processing unit while it waits for some other value to become available (another processing unit is using it).

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