Line simulators are fun. The ports can call each other and there's no need to set any custom init strings on the modem like you need with the 9 volt trick. For some old devices that's a necessity.
You can also use an old VoIP ATA from Linksys/Cisco as a cheap line simulator. Like a fully analog TLS the ports can call each other. They can be a PITA to configure right but they're cheap and work well enough.
I've used all three methods, the TLS is the easiest. An ATA can be useful if you've got more than one and your dial-in server is in a different room from the client you're playing with. An ATA can also be set to "call" another device. So your office ATA can call the basement ATA (with your Linux server) as an example.
I gauge the seriousness of all manned space exploration proposals by the attention paid to the toilets. If the toilets are not a solved problem with many nines of reliability, you're just writing science function and are not at all serious about actual manned space exploration. Toilets are the brown M&M clause[0] of manned spaceflight proposals.
Toilets are unglamorous in the extreme but absolutely vital. Humans make hazardous and potentially deadly waste. Every day. It needs to be safely discarded/contained. In a sealed environment in microgravity it's even more dangerous than it is on Earth.
Aerosolized fecal matter can enter the lungs and cause deadly infections. Entering the digestive system can cause debilitating (possibly deadly) illness. Temporary blindness if it gets in the eyes. It can also cause mechanical or electrical problems if it gets in equipment. All of these can lead to a mission failure and in extreme instances a total loss of the crew. Apollo 8 was extremely lucky that Frank Borman's illness didn't cause more problems.
If you're not thinking logistics and infrastructure you're not really serious about an endeavor.
I have seen engineering shops where the conversation about fixing some small but simple thing before a deadline gets filed into "better to give the consultants reviewing this some low hanging fruit for the snag list."
> In a sealed environment in microgravity it's even more dangerous than it is on Earth. / Aerosolized fecal matter can enter the lungs and cause deadly infections.
Would the air filtration / recycling system minimize this risk?
The air filtration will actually help spread aerosols because air currents will carry them through the cabin before they're captured by a filter.
A high power "eliminate aerosols" mode would be one of those infrastructure things that need to be designed (and tested). Even then a single compartment spacecraft like the Orion or Dragon wouldn't have anywhere for the crew to bivouac while some aerosol evacuation mode was active. So you'd want a whole procedure designed around it.
Part of the need for the Apollo Constant Wear Garments was to make up for the lack of faculties in the command module and LEM. Such a thing would be impractical for a long duration mission so toilets (and waste disposal in general) need to be a reliably solved problem.
I could imagine the belters in The Expanse just throwing on suits and venting. Of course that only works if you have a bunch of canned air or something that makes it by cracking minerals on board.
> The air filtration will actually help spread aerosols because air currents will carry them through the cabin before they're captured by a filter.
The toilet facilities could have input / suction into the air filtration system. Maybe wise anyway.
> A high power "eliminate aerosols" mode would be one of those infrastructure things that need to be designed (and tested).
I expect the technology is mature in industrial settings, though of course that is much different than microgravity and the constrained resources of the spacecraft. Maybe it exists on the space station? That context still seems significantly different.
> a single compartment spacecraft like the Orion or Dragon wouldn't have anywhere for the crew to bivouac
In their spacesuits, though their exteriors may need decontamination. Maybe they just go outside, though probably not a great idea to have the entire crew outside the spacecraft simultaneously! Maybe in an emergency.
The Space Shuttle and ISS (and Orion) had/have microgravity toilets. They have some active suction and spinning tines that push the material against the walls of the containment vessel. The ISS toilet has changeable waste containers that are dumped in the unmanned supply capsules.
The Space Shuttle's toilet was just cleaned during servicing after a mission. The Shuttle had a max flight duration of about two weeks so there wasn't a need to have changeable waste containers.
In the case a toilet catastrophically malfunctions in microgravity imagine a snow globe. Whatever way you want to filter out the "snow"...it's going to land on everything inside.
In the most literal sense shit is serious in space.
Speaking of this: let’s talk about space settlement.
If you’re going to stay, you are going to be having babies.
Any tech tree proposal for a space settlement (planet, moon, spin stations, whatever) that does not address how to make and reuse or recycle diapers is not serious.
I never see this mentioned in sci-fi or in space nerd discourse around stuff like what you need to settle Mars. It’s up there with potable water, at least if you want humans to reproduce.
> If you’re going to stay, you are going to be having babies
This is a hurdle for settlement. Not exploration. Toilets are a hurdle for exploration, as is trauma medicine.
I’m not dismissing the need to do experiments with pregnant rats on the Moon. But until we’re dealing with multi-year missions on Mars, gestation isn’t on the Gantt chart.
> I never see this mentioned in sci-fi
The Expanse and A City on Mars speak to this precisely and extensively.
They read the Three Body Problem but forgot that light exists. For aliens with interferometers looking at Earth there's little question there's some sort of interesting active chemistry (life) here.
Theres no hiding that fact. If they're within about 100 light years they'll be watching the effects of the Industrial Revolution on the atmosphere. Even if they're don't know the exact cause the spectra of pollutants and rates of change will give hints the changes are unlikely to be from random natural processes.
Outside of 100 light years but pretty much anywhere in the galaxy (assuming interferometers capable of getting spectra of Earth) will know there's some sort of life here. Even if you want to assume some aliens don't recognize life as we understand it they'll at least see extremely interesting and varied chemistry.
The idea you're going to hide Earth's biosignatures is silly. Trying to hide our technology signatures is pointless. At about 70 light years any interested aliens will start seeing isotopes resulting from above ground nuclear testing.
Telescopes aren't magic, and space is big. There are 100 billion+ stars in the galaxy. Within a 100 light-year radius, there are 27 ( https://en.wikipedia.org/wiki/List_of_star_systems_within_95... ). Nobody's looking at Earth. If any hypothetical civilization were to find our system, it would be by blanketing the entire galaxy in 100 billion drones and checking every single star, in which case the dark forest doesn't matter anyway.
First that's just star systems within 100 lightyears of Earth, systems with one of more gravitationally bound stars in them. There are thousands of stars within 100 light years of Earth. Most are red dwarfs but there's about a thousand F, G, and K class stars.[0]
While telescopes indeed are not magic, an alien species at least as advanced as us could have telescopes capable of not only finding Earth but gathering spectra from it. It's certainly no guarantee Earth would be found but there's no hiding from anyone looking. There's no masking the chemistry of life on Earth and likewise no masting techno-signatures in the atmosphere.
If they are at our current tech level, to "see" Earth, then Earth would need to pass in front of the Sun from their point of view. That means they would need to be somewhere in the same pane as the Earth's orbit.
That's a transiting detection, there's other detection methods for exoplanets. Even a coarse grained survey with a ground based traditional telescope can find our solar system thanks to Jupiter's gravitational influence on the Sun. Doppler shift's in the Sun's spectra come from Jupiter tugging at it gravitationally. With interferometry and coronagraphy spectra of planets in our system can be gathered without needing to see our system edge-on. Then of course for aliens on the ecliptic there's transiting spectra of Earth.
The number of techniques for detecting exoplanets makes the Dark Forest concept silly. There's no hiding our solar system from alien observation. For dedicated observers (at the right distances) there's no hiding the existence of life, the Industrial Revolution, or above ground nuclear testing.
If you spend $35k and just idle the machine or just check e-mail you've burnt the money. If it's your work machine and you've got a $100/hr billable rate it's paid for in a little over a month. Three months at a $50/hr rate.
If you bought the $35k Mac Pro in 2023 when it was released and have a $50/hr rate it's been paid off for about 30 months. So as of today those owners probably aren't too broken hearted. They'll likely get at least another three years out of them.
People buying $35k Mac Pros probably paid them off after a single contract. So they've just been making money rather than costing money.
If you spend $35k on a nice computer, and then earn $35k from doing some work using it, that doesn't mean that buying the computer has paid for itself unless the computer is solely responsible for that income. It probably isn't.
It's not necessarily even true that after doing that work it's "paid for", in the sense that getting the $35k income means that you were able to afford the $35k computer: that only follows if you didn't need any of that income for other luxuries, such as food and shelter.
If you're earning $50/hour, 40hr/week then what you've done after 17.5 weeks is earned enough to buy that $35k computer. Assuming you don't need any of that money for anything else, like food and shelter.
If the fancy computer helps you get that income then of course it's perfectly legit to estimate how much difference it makes and decide it pays for itself, but it's not as simple as comparing the price of the computer with your total income.
Regardless of how much it contributes, if you have plenty of money then it's also perfectly legit to say "I can comfortably afford this and I want it so I'll but it" but, again, it's not as simple as comparing the price of the computer with your total income.
I don’t think working faster 4x makes you experience time dilation to the degree that you experience 8.75 weeks as 4 in your frame of reference; but my relativity math is a bit rusty, I could be wrong.
I have a bunny suit plushie on my shelf to this day. The other Pentium marketing blitz I remember was in the 1998 Lost in Space which had a TV ad for a Pentium XXI or something. Also notable was the Silicon Graphics branding in that movie. Which I have always found amusing since SGI didn't have any consumer products and even for businesses the prices were "Call Us" which has always meant eye watering expensive.
Any router made by a company that "donates" (bribes) to Trump's "ballroom" or other vanity projects will get approved. Irrespective of anything else. This is just another grift.
> Elon has said several times that humans can drive with two eyes and Tesla should be able...
And this is an amazingly stupid statement. Humans drive with most of their senses, not just vision. In fact our proprioception plays an important role in driving.
Even Tesla's use of cameras is poor because they're monocular and fixed in place. Most humans have binocular vision and those visual sensors have multiple degrees of freedom and the ability to adjust focus.
Even if you wanted to only use vision for navigation it's irresponsible to not use binocular configurations that get more reliable depth sensing.
"Without a winking smiley or other blatant display of humor, it is utterly impossible to parody a Creationist in such a way that someone won't mistake for the genuine article".
They changed the name of the company to distance themselves from a number of scandals including Cambridge Analytica, COVID vaccine misinformation, and sitting on studies about teen mental health and social media use.[0]
Not sure why you're downvoted but I absolutely do think that they changed their name for better branding. I also think they were involved in a number of antitrust lawsuits so renaming their company to Meta says "see, we're the underdog in this new big VR industry, we're not a monopoly".
You can also use an old VoIP ATA from Linksys/Cisco as a cheap line simulator. Like a fully analog TLS the ports can call each other. They can be a PITA to configure right but they're cheap and work well enough.
I've used all three methods, the TLS is the easiest. An ATA can be useful if you've got more than one and your dial-in server is in a different room from the client you're playing with. An ATA can also be set to "call" another device. So your office ATA can call the basement ATA (with your Linux server) as an example.
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