Would be funny if Winamp gets a second life ~20 later.

The idea is to make it effectively legal to kill anybody deemed left-of-center

President Joe Biden, in a video posted Thursday on X, touted the proposal as "an important move toward reversing longstanding inequities."

"Look folks, no one should be in jail for merely using or possessing marijuana. Period," he said. "Far too many lives have been upended because of a failed approach to marijuana, and I'm committed to righting those wrongs."

South Africa has asked the international court of justice (ICJ) to urgently order Israel to end its assault on Rafah, halt its military campaign across Gaza, and allow international investigators and journalists into the territory.

In a court hearing, lawyers for South Africa expanded a written request for judges to issue an emergency order to stop the offensive into Rafah, Gaza’s southernmost city.

They argued that seven months into the war, which has killed more than 35,000 people and reduced much of Gaza to rubble, the scale of suffering was now so intense that a total ceasefire was needed to get food, medicine and other aid to its desperate population.

MBFC
Archive

This is one I’ve had on my list for months now, and I finally decided to just go ahead and make it. Back when I was researching solar cookers, solar concentrator, and solar furnaces, I ran into a few really interesting ideas around fresnel lenses. Look them up on youtube and you can find all kinds videos of people melting glass or burning skillsaw blades in half, but the ones that kind of showed me how useful a really-concentrated point of heat could be was this 3D printer for sintering sand into glass objects and this solar rig for smelting zinc or aluminum. Both used fresnel lenses, but were limited by the size of their portable builds.

So here’s my take on something bigger and more permanent, though hopefully still flexible enough to do multiple jobs using concentrated sunlight. The building’s tower houses an observatory-style dome with an irising shutter around a very large fresnel lens. This lens is meant to gather light, but deliberately doesn’t focus it too much, just directs it to another lens, which aims the light straight down. There, on a motorized rig which allows for some adjustment up and down, is the third lens which actually brings it to a searing focal point.

With that focal point reliable and known, the people at the workshop could move several different tools underneath it as necessary, from a crucible for smelting, to a firepot for solar forging, perhaps a glassblowing oven, a 3D sinterer, or the large CNC plasma cutter-style rig shown in the scene.

A set of computers would be set up with light sensors and control over the rotation of the dome, to allow it to track the sun, and the width of the aperture in the shutters, to allow it to regulate the amount of light. The upper limit on the light would be based on how bright the day is, but if they need anything less than full sun, then the opening and closing of the shutters should help with providing consistency. If it starts around half open in full sun and a cloud moves in front of the dome, it might open all the way, then close partially as the cloud leaves. With many minute adjustments, the overall amount of light could remain very consistent down on the ground.

As for the level of focus, I suspect the kerf while cutting would almost definitely be wider than with a modern plasma cutter, but like I said before, people have cut through skillsaw blades with just a lens from a rear-projection TV. So it's possible a larger lens could concentrate even more heat, allowing it to burn through much faster, with less damage to the surrounding material. The tightness of the point would mostly come down to the quality of the lens, as far as I know.

I’ve tried to include a number of controls, caution markings, and red emergency stop buttons, but the one thing I really don’t like about the design as drawn is that it’s not obviously fail-safe. I think ideally there’d be some kind of hanging weight or other mechanism so that when power is lost (not just to the building, as that probably happens fairly often on a less-reliable grid, but to the system’s control unit) the shutters or another light-blocking mechanism slams into place.

Other notes about the scene, I’ve tried to include a diversity of ways to use the sun, the photovoltaic panels for powering the electronics and perhaps some of the tools, a set of fiberoptic solar daylighting systems, which track the sun and pipe light down to the shop floor, along with the simplest version, large windows. This emphasis on daylight should help avoid the risk of electric lights strobing in sync with moving items (such as on a lathe or milling machine) which can cause them to appear stationary and safe to grab onto, though they likely have two sources of light on each just in case. I’ve also included a water wheel, either for power generation, or for the direct motion, to be connected to certain tools or machinery via axles and belts.

The internet has made a lot of people armchair experts happy to offer their perspective with a degree of certainty, without doing the work to identify gaps in their knowledge. Often the mark of genuine expertise is knowing the limitations of your knowledge.

This isn't a social media thing exclusively of course, I've met it in the real world too.

When I worked as a repair technician, members of the public would ask me for my diagnosis of faults and then debate them with me.

I've dedicated the second half of my life to understanding people and how they work, in this field it's even worse because everyone has opinions on that topic!

And yet my friend who has a physics PhD doesn't endure people explaining why his theories about battery tech are incorrect because of an article they read or an anecdote from someone's past.

So I'm curious, do some fields experience this more than others?

If you have a field of expertise do you find people love to debate you without taking into account the gulf of awareness, skills and knowledge?

This is in Oregon and there is a hot springs nearby. It’s worth seeing but for a better time check out the French Glen Hotel and Malhuer wildlife refuge.

Also RIP Jessi Combs who died breaking the record.

NATO allies are inching closer to sending troops into Ukraine to train Ukrainian forces, a move that would be another blurring of a previous red line and could draw the United States and Europe more directly into the war.

Ukraine’s manpower shortage has reached a critical point, and its position on the battlefield in recent weeks has seriously worsened as Russia has accelerated its advances to take advantage of delays in shipments of American weapons. As a result, Ukrainian officials have asked their American and NATO counterparts to help train 150,000 new recruits closer to the front line for faster deployment.

So far the United States has said no, but Gen. Charles Q. Brown Jr., the chairman of the Joint Chiefs of Staff, said on Thursday that a NATO deployment of trainers appeared inevitable. “We’ll get there eventually, over time,” he said.

MBFC
Archive

Image description: A small blue and black fairywren standing on a long grass stalk, surrounded by grass