morcheeba

Even without the wind, the separate words help. In crew (rowed) boats, people sit backwards. And then boats are stored on racks upside-down. It can get complicated!

I love that the TMS34082 math coprocessor had user-definable microcode! This was intended to work with 3D graphics, so you could really get the most out of the ALU by chaining operations for your specific need (e.g. divide-and-sqrt single instruction)

See chapter 8: http://www.bitsavers.org/components/ti/TMS340xx/TMS34082_Des...

Maybe a combination? Even simple beamforming/stereo would be helpful to help display the speaker's location. For example, the "speaker 1" tag could appear on the left, center, or right of the display to give a spatial clue where they are located.

There are also cultural differences, too. Asian companies preferred colder whites, while our US customer wanted a warmer white. We were told this made the different skin tones more attractive.

Ah, you must not have seen the pre-ipod players. The Personal Jukebox was 2.5 larger than an ipod. It didn't fit in a pocket and the grey plastic felt cheap compared to the ipod's shiny metal back. It really felt experimental, and nothing like the polished Walkmen Sony was making.

I too was also expecting a same-thrust controlled study.

From the fundamental frequencies in the two graphs, we can see the toroidal propeller (72 Hz) is spinning slower than the traditional (88 Hz). Assuming, of course the same fundamental vs. rpm relationship -- the toroidal has twice the number of "blades" as standard, but I'm not sure how that manifests sonically. I wonder how a 3-blade or 4-blade propeller would compare to the standard 2-blade.

Also, a big difference between quadcopter and other propellers (boat, plane, heli) is that they use change speed to carefully control thrust - most quadcopters use fixed pitches. Adding mass to the propeller can reduce responsiveness, which means less stability ... but I don't know enough about the magnitude of this effect to know if that's a problem.

CCC was a lot of fun. At the time there was a special package for people from the US for hostel+admission so that no one would be stuck with airfare and no ticket. Had a great time, ended up talking the night away at the hostel bar with the keynote speaker and didn't realize who it was. (not creepy, just fun hacker talk)

That was a tactic Nintendo used with the gameboy. The courts eventually decided that the logo, when used as an access token like that, no longer qualified for the creative component required for copyright protection.

yep, same author: https://github.com/ozkl?tab=repositories

You don't remember the phone-bolted-on-to-an-ipod renders. There were lots of surprises, and even then the impact of half the innovations weren't widely recognized at the time. https://theultralinx.com/2014/07/6-crazy-iphone-mockups-real...

You are correct - two things happening here: 1. Picking up RF energy from far away. This is the easy part - cell phone antennas are already a big compromise and can be improved on if you increase size or cost. Instead of omni-directional antennas and low-power amplifiers, a directional antenna and low noise amp will work wonders. Cell phones already have extra power to get through buildings and trees; in this case that power would be used to go extra distance (because there won't be these obstacles).

2. Many users seen at once. Each beam is only a 15-mile-diameter circle. In the really remote areas where this coverage would be needed, I don't suspect that there would be too many cell phones - maybe a few hundred at most.

http://www.satmagazine.com/story.php?number=1026762698

It has only 64 shades (6-bit) instead of your more typical 8-bit, so this more limited colors than you'd expect.

Banding is more typically seen in monochromatic gradients - black and white or shades of sky blue. But this image is a yellow/blue gradient, and it's super unnatural to have the RGB channels transition at the same time - typically they transition at different locations and that helps smooth things out.

That sounds good! Two other solutions:

- low pass filter. Assuming the dust is small compared to the expected movement in the groove, you can filter it out electornically.

- dust detector. Nikon had a cool 35mm scanner... instead of RGB, it had an additional IR layer at an angle just to detect dust. So, automated dust removal tools knew if a black spot in an image was supposed to be there, or if it was actually dust. Here, extra optics would know if the laser was reading dust and could mute/filter the sound during that time.

That's a great graph, thanks. But there is a whole lot factored in to those numbers. Check out this paragraph in the next page:

>The running of aging nuclear power plants generally leads to higher operating and maintenance costs. Only in the U.S., the nuclear industry has claimed a cost reduction of 35 percent since 2012 to US$29.4/MWh in 2020—the lowest since the collection of industry-wide data in 2002—in particular due to a 57 percent drop in capital expenditures over the period.

Here's the source they use - it explains this much better: https://www.nei.org/resources/reports-briefs/nuclear-costs-i...

So, what's the difference? Nuclear is different because it costs the same to run per hour no matter how much power is generated. So, when demand is down, costs remain the same - while coal and gas can just use less fuel, which is their major cost. The risk that nuclear won't be able to run at higher loads increases costs overall. If market forces could guarantee usage, then costs would lower.

There's definitely a lot to explore here... power pricing is complicated!

Good explanation.

A simple GPS receiver will have a generic mathematical model for the ionosphere and use that as a good guess. More advanced ones can measure the delay directly.

The ionosphere affects different frequencies differently, so the GPS satellites transmits additional signals at different frequencies. By measuring the phase of these signals (L1 and L2), the math can be done to get a better estimation of the delay caused by the ionosphere between each satellite and the receiver. Those are the dots we're seeing on this animation. (GPS also uses the L2 signal to transmit encrypted information that lets military receivers get a better fix than civilian receivers).

more info: https://www.e-education.psu.edu/geog862/node/1715

>If a vendor doesn't work out, just move to another RISC-V vendor.

It doesn't really work that way. NASA needs two main things that most vendors can't supply: a radiation-hardened chip, and super-high quality controls. Implementing on an FPGA is much slower than an ASIC, but the ESA did it with the LEON3 processor.

Radiation hardening can come in a variety of ways, from redundant designs (3-core voting, EDAC) to manufacturing processes (silicon-on-insulator, gate structures) to even packaging (high density ceramic). These have very little overlap with commercial applications, so the vendor choice is still very limited.

I guess use an Energizer e2 titanium battery? /s

No idea. I talked with the truck driver, and he said we was being paid way more than $8 for the delivery. I used my company account, so I guess they're willing to take a loss on some orders and make it up on others.

Art project to repurpose an IKEA lamp in to kinetic wall art.

Medtronic buys a lot of companies and rebrands their products under their name. Software quality is going to vary a lot, because it comes from a wide variety of sources.

It's funny how those are the same arguments people made when a company that built PCs started making phones. How could they compete with Verizon?! They were thinking evolutionary, but the iPhone had so many fundamental changes (technological, business, social) that upended an industry and made new ones. I'm not saying the car is a good idea, but Apple has overcome entrenched competition before with very capable competitors.

I'll second that. I ordered an 8-foot-long aluminum bar for $25, which, at the time, was too long to ship with traditional shippers. So, a semi trailer showed up at my door. Shipping cost $8.

A 150uF capacitor should keep the microcontroller running for about 5 seconds without power; it could keep time. 7.3mm x 4.3mm x 2.9mm

There are so many good resources that weren't available when I was learning. Online, and a good in-person mentor helps too.

Limor and crew does a great job: https://learn.adafruit.com Or start with the Arduino ecosystem: https://learn.sparkfun.com/tutorials/what-is-an-arduino/all

Interesting! ESA has been using a custom SPARC V8 rad hard architecture: https://en.wikipedia.org/wiki/LEON

I'm currently using a dual-core 90 MHz processor that is relatively advanced and has good performance for many applications. It has error-correcting memories (SDRAM, cache, registers) and a lot of integrated peripherals (spacewire, serial, ethernet, 1553, CCSDS) that help reduce board complexity.

Next up in the pipeline is an 8-core 1 GHz monster: https://www.gaisler.com/index.php/products/components/gr765

My best friend's husband is always bringing home winning $20 or $50 lotto tickets. His family can't afford the $75 a week he spends on those, but every gas station sells them. Even not-out-of-control cases are harmful.

That was one design that was extensively tested and then copied. Weight was no concern.

Most satellites are unique, so the same can't be done. Besides being weight critical, every failed satellite becomes space junk.

Cool, thanks! I use Stocks on a variety of platforms and never seem to scroll down far enough to see the ad, so I had to check to see why my experience was vastly different. I'm in the same boat as you without News+.

That's not what Stocks looks like - you scrolled down about two pages to get to the ad. You make it look like the ad is first. https://imgur.com/a/t7ncKoc

I've always seen GT programs as a special-needs for bright kids who would be bored to tears in a traditional school.