NathanielK

Here in North America, most ebikers just wear bicycle helmets. Bicycle helmets are only rated for a fall from 2.0m onto the ground, or about 22km/h. [0] Ebikes tend to go much quicker than this.

[0]https://www.astm.org/Standards/F1447.htm

The implication is that most DIY ebikers don't bother with pedalling. Hand throttle keeps you at 50km/h fine.

Long seatposts that bring you up to a typical height are fine. The suspension is doing the work, no need to leave the saddle.

Two strokes (and any other small engined scoot) qualify as low speed motorcycles here in Ontario. They require license, registration, and insurance. As a result, there is no market for them.

Ebikes on the other hand are legally bicycles. As long as you have pedals and officially limit yourself to 500W/32km/h, there are no restrictions.

At these low speeds, even a "small" 1kWh battery can run for two hours. That's 60-70km of range. Good for most commutes inside the city. Any further and you can take it with you on public transit that supports bicycles.

Really hard to make a case for two strokes here, maybe you live somewhere more forgiving.

Assuming his motor is mounted tight enough so that the tire loses traction before his friction drive does, he's likely halving his tire life.

That's fine for a project, but hub motors and mid drive motors are widely available now.

The shocks on most cheap bikes are questionable at best. Lots of stiction and you're lucky if there's any dampening at all.

Downhill mountainbikes are popular conversions. They are designed with high speeds and impacts in mind. The cost may be prohibitive to many DIYers though.

For high speed (50km/h), adequate tires are also necessary. E50 rated tires are now widely available that can handle the speeds and loads.

Around 2014 (haswell era), Thinkpads all had the same wifi hardware, an Intel 7260. They still pulled this stunt by disabling 5GHz bands on cheaper models.

The next year they ditched the whitelist on most models.

It's not degree-Kelvin, it's just Kelvin. The article's been updated to clarify, but if it only said 1,800 degrees, it'd likely be referring to degree Celsius.

The science backs that up[0].

[0]https://www.youtube.com/watch?v=uSrsk6tbnkE&t=90s

Good info, but your citations are a bit jumbled up Doctor.

> I always wondered if this was a good ratio. I get that green usually has the strongest signal and thus better low-light performance.

More importantly, green is close to what your eyes perceive as luminance. This is important because you can perceive a lot more luma detail than chroma detail. This is why things like 4:2:2 sampling work.

If you read Bayer's original patent, he proposed using Y Cr Cb (luminance, colour part red, colour part blue) instead of GBR filters[0]. This would people optimal from a computer science perspective. Sadly it doesn't work physically. Sensing negative-blue and negative-red can't really be done with a simple filter.

[0] https://patents.google.com/patent/US3971065

Yes, but it may require you update things manually. You can disable the Play store and any other apps and only use F-Droid.

Depends what format you have it in now. 160kbps opus is transparent for almost all music. That's 1/5 the space of a FLAC collection, or 1/2 the size of 320kbps mp3, two other popular ways to store music without noticeable loss in quality.

2.6g/L of NaCL ends up being ~1000mg/L of sodium, which sounds about right.

It depends if you're eating anything else. Managing sugar is less of an issue since snacking as you go is usually possible. Your body is pretty good at telling you went to eat more, but knowing when to supplement salt is less intuitive.

Salt concentrations are tricky too. Saline solution is ~3500mg/L of sodium, but that's over kill for drinking. Since you reabsorb some sodium when you sweat (less if you sweat more), you wouldn't want to replace lost water with an isotonic mixture.

It's fairly common in athletes. 13% of the marathon runners tested [0] had hyponatremia. This was at the Boston Marathon, a fairly exclusive race with experienced runners.

[0] https://www.nejm.org/doi/full/10.1056/NEJMoa043901

Pocari Sweat is 67g/L of sugar and 490mg/L. This is on par with western sports drinks like Gatorade(59g/L sugar, 523mg/L sodium)or Powerade (57g/L sugar, 409mg/L sodium). This is less sweet than typical sugary drinks which can be 10-15% sugar, but normal for a sports drink.

Sports drinks certainly help if you are sweating moderately, but are inadequate for intense exercise in the heat. When you are sweating intensely (>1L/h of sweat), you can lose sodium at over 1000mg/L. Supplementing sodium and other electrolytes may be necessary.

Once you start using high speed sensors taped to the screens, you starting noticing how slow LCDs are. It's a lot slower than the marketing wank says. [0]

[0] https://www.youtube.com/watch?v=MbZUgKpzTA0

His philosophy is that Strength is Everything, so cutting weight or limiting calorie intake for "lean gains" limits the muscle mass (and strength) you could be gaining.

It all depends on your goals.

Amusingly, both those examples used to be common.

Old CRT monitors ran at up to 160-170Hz. Even at lower refresh rates motion was still clear. Key rollover really became a big issue with early USB keyboards and janky membrane setups. Many old keyboards didn't have the issue.

In my opinion, games are at least designed around the lowest common denominator. Very few twitch-shooters are popular now. Most shooters have other characters/classes that let players with disadvantageous equipment still join in on the fun. If everything is a blur playing "Scout" in TF2, you can play "Engineer" instead and let the automated turrets do the work for you.

I think there's a certain Director's Vision gaming setup. Ideally, everyone could play on a big screen, where everything is clear, not muddied by the physical realities of technology.

> respect that it is iron and that iron will rust if you strip away the protective layer, so don't do that.

Leaving it wet doesn't do you any favours either though.

It really depends on the battery technology. Lithium-Titanate batteries are starting to be used in hybrid vehicle powertrains.

It is much lower energy density than typical BEV batteries. It is also rated at 20x the cycles and can be charged and discharged very quickly with minimal issues.

The technology has come a long way from the NiMH cells that die after a decade.

I think the Flip Car[0] from Fast & Furious 6 would make a great commuter vehicle for you.

[0] https://fastandfurious.fandom.com/wiki/Flip_Car

Fan life really depends on usecase. The bearings roughly have a certain number of cycles, and most consumers just don't push them that hard.

For example a tiny 1000 RPM server fan running 24/7 rotates 5 billion times per year. My desktop spends most of it's time off, but if I game on it 10% of the time it's big fans might be at 1000RPM. This is only 50 million cycles per year.

> Here's the thing: all the other laptops I was looking at cost at least twice the price. High-end Thinkpads, my second choice, almost 3 times.

It shouldn't be this way, but most of the big enterprise retailers have ridiculous sticker prices. Unlike Apple, volume buyers get steep discounts, and individuals are expected to wait for a discount.

Ask around online and you'll find it's fairly simple to get fancy Thinkpads for half-off.

> On 3. note that carbohydrates are the only of the three macronutient we don't need to eat at all (see eskimo).

This isn't true. Although the Intuit people were largely carnivorous, they did not have a "keto" diet. They ate a lot of meat, but the animals they ate have extremely high amounts of natural glycogen. They also did not eat as much fat as expected, because animal fat was their source of heat and light for long winter nights.

> ...When is abundant, the average daily diet of the adult Eskimo consists approximately of 30 to 40 grams of carbohydrate (which includes glycogen), 250 to 300 grams of protein, and about 150 grams of fat (FA/G=1.2). These amounts of meat are apparently not heroic, for it has been alleged that the Yakuts, on the Low Steppe, east of the Lena, eat as much as 25 and 30 pounds of meat a day.” —I.M. Rabinowitch (1936)

If you are curious, this is an accessible review of the available materials.[1]

[1] https://web.archive.org/web/20201112035644/https://www.freet...

Wii U keeps the original Wii/Gamecube GPU. It has another chip behind it that scales it to HDMI. This is also why Wii 240p doesn't work on the Wii U. Instead old VC games will be a slightly blurry 480p at best.

If you want the clearest 480p, the original Wii will do. With component cables and a compatible TV, it should be just as clear as DreamCast VGA.

> video game systems that used interlacing, like the n64, playstation, and up until the hdmi era, did not usually do this afaik, opting to instead drop the frame rate to 30fps with 2 fields per frame, so they really were in many ways the worst of all worlds.

480i Nintendo consoles (N64, GCN, WII) all had many 60FPS games. The 30FPS limit was almost always because of the relatively underpowered hardware. Some N64 games even ran at 20FPS!

Unlike the broadcast OLED displays, those Bravias use normal LCD panels. They're closer to consumer TVs, but lack the TV tuner for legal reasons.

If you're just using it over HDMI, it would work fine as a main TV. The added brightness would may be appreciated.

The gotcha is that it already runs an outdated version of Android(9.0). Sony consumer TVs that released back then didn't have ads. It was only a later Google update that added ads to the UI.[1] No guarantees these signage displays will be safe if you updated them over the internet.

[1] https://www.rtings.com/tv/tests/ads-in-smart-tv#remove-sony-...

They exist[1]. The pricing is likely out of your budget though.

The included ads, large volumes, and low margins all drive down the cost of consumer displays. Your dream might also end up quite expensive. [1] https://pro.sony/ue_US/products/broadcastpromonitors

They'd like to make some margin selling computers. The cheaper base model machines are very competitively priced between manufacturers. Much easier to make your profit on options.