If someone wanted, they could drive up to my house and see the colour of my door. The fact that someone has always been able to create a database of front door colours isn't inherently a data leak.
A UUID and electricity usage for the past half hour for a house in the general vicinity isn't useful. Even if you could put a name to that UUID, I struggle to think of how that would be a major issue. Especially considering with a thermal camera, and assuming construction details from the age and type of the house, you could already estimate your neighbours energy usage anyway.
We like to conceptualise OSes as programs, but at the low end they start to resemble libraries.
if your FS is just a library, process switching is timers and interrupts, and memory protection is provided by the processor, what is the OS? Where is the OS?
Anorexics aren't happy with their body. If they go to a site where they find acceptance and understanding, thats good?
And on the other hand, it used to be the case that Models were stick thin. If the fat acceptance crowd succeeds, and fat becomes the standard of beauty and people try and emulate that, thats bad.
The difference is that Anorexics don't accept themselves, and try to achieve an unhealthy weight. Obese people are trying to gain acceptance for the unhealthy weight they are.
The danger is that acceptance is an overloaded term. It isn't just accepting one individual who is already fat. Its shifting culture to the point where it becomes a standard for beauty, which is where people start emulating it.
You can disagree with the position, whilst accepting that MPs have been murdered, and MPs do get threatened online.
What specific level of power hunger makes a threat to life acceptable?
Further, I wasn't in favour of these proposals, but if you have people on HN of all places thinking its acceptable to threaten people, maybe we do need this law.
Every law that the MPs create is itself a threat against the people. A prescriptive law can only be described as "Do what I say, or I will hurt you." Agents of the state create laws, and then take your money and pay that money to men with guns to come after you if you fail to comply.
Murder is already illegal, and threatening to murder someone is already illegal. Any further legislation, the burden of proof is on them not on me or the parent poster. Otherwise one day they might claim that me taking a shit will lead to their murder and have my toilets removed.
Im not saying the burden of proof is on you. I'm not saying murder is legal.
I'm saying that making sarcastic comments suggesting that MPs deserve to be murdered or threatened isn't acceptable.
Its a completely separate issue from the law theyve introduced, which as I said, I'm not in favour of, and I agree they need to make the case before they remove your toilets, I've already made such a comment elsewhere in this thread.
I suppose the difference for me is I've not seen any examples of Child sexual abuse online. Its obviously a bad thing, so steps taken to prevent that directly are a good thing. When you start restricting everyone, in order to stop that harm, then you need to start quantifying risks.
This isn't arresting murderers, this is restricting the sale of rope that murderers might use on their victims. or to get more specific. this isn't banning clubs where murderers can get together. this is imposing checks on all clubs to make sure there aren't any murderers in them.
If it reasonable for the boy scouts to do checks on their members to make sure that a few of them aren't planning a murder? should the boy scouts be responsible if a few boys do go and murder someone? a murder that was planned in the scout hut?
This is restricting the sale of "how to murder people" handbooks, even at garage sales. Therefore every garage sale proprietor is burdened to make sure they aren't selling a handbook explaining how to murder people, even if they got a load of miscellaneous items from an anonymous person.
I think it means that it's like [Lunos](https://www.lunos.de/en/for-heat-recovery). The unit alternates between exhaust and intake every couple of minutes. The air being exhausted heats up a core, which in the next cycle warms the air from the outside. Lunos e2 is advertised to recover 90% of heat and 20–30% of humidity.
yes i get that, but say you have an indoor temp of 30c and an outdoor temp of 0c. the average of this heat exchanger is going to be 15c. so on average youre only cooling the exhaust down to 15, and heating up the intake to 15c.
a counter flow heat exchanger can get the temperature higher than the average because 30c exhaust is meeting partially warmed intake, and 0c intake is meeting partially cooled exhaust.
Perhaps https://news.ycombinator.com/item?id=42428537 or its parent will make sense to you: connecting 3 or more perfect constant-temperature regenerative heat exchangers in a series would make the ones at the ends work at a higher/lower temperature (of the constant-temperature heat sink for those exchangers) than the one in the middle, increasing efficiency of the overall system.
I'm not proposing this as a practical design, but it convinces me that 50% efficiency is not the limit.
It's closer to a counter-flow heat exchanger, but you could still have air only go in one direction at a time. Say your indoor temperature is 20 degrees and the 3 heat exchangers are at 25, 30, and 35 degrees, and outside is 40 degrees (I'm thinking in Celsius, though 40 is a bit extreme). You blow air out until they cool to 20, 25, and 30 degrees. Then you blow air the other way until they heat back up to 25, 30, and 35 degrees, with the air coming in being somewhere in the 20-25 degree range instead of 40 degrees that the outside air is at.
This assumes that the heat exchanger has just enough thermal capacity so that raising/lowering its temperature by 5 degrees would get the air to the same temperature. In fact, it might be easier to imagine if the air doesn't blow continuously. Each chamber could fill up with air and wait for the heat exchanger and the air to get to the same temperature, before moving the air to the next chamber.
Though the average temp of the overall core may be 15c, there may be a thermal gradient along the length, so maybe the inside end averages 28c and the outside end averages 2c, or something like that.
I was trying to reason it out, you have the thermal mass of the heat exchanger material, that you aren't going to be able to tune to every temp differential.
at the start of the cycle, it may be very efficient, but at the end of the cycle where the heat exchanger temperature is going to approximate the temperature of the air, efficiency is going to drop, and that would be happening along the length of the heat exchanger, so by the end of the cycle the inlet would be basically doing nothing, and the exhaust quickly getting to that point (in the best case).
I was starting to confuse myself at this point, so the constant temp model seemed easier to reason about.
Although, having written all this the model would basically be a constantly shortening counter flow heat exchanger? with a thermal mass not necessarily tuned to the temp diff.
So its still going to be worse than a counterflow heat exchanger, at least theoretically.
I don't think its stupid, its just working within the confines of what Apple have provided.
The question is, if everyone jumps on this 'solution' and it becomes an issue, will Apple 'fix' it by slowing down these busy wait threads, or provide an option for devs to do it 'properly'
The best approach would be to treat "High Performance" as a system-controlled attribute like "Can Read Location Data"; the app can make a request for a performance profile it's designed against, the user gets final say-so, the OS records the user's decision and re-uses it for future launches.
This gives best of both worlds; users who need performance pick it, users who don't need/don't understand get to be kept safe by Apple's scheduler. Apps get back the state, so they can render a different icon or something to indicate "Hey we'll do our best but your hardware may not max out because scheduling wasn't built for this task"
It's not about safety but battery life. I don't think bombarding non-technical users with all kinds of tradeoffs is the best option, but this seems to be a niche app case. Maybe an attribute could work, but it's difficult to say if that guarantees anything. Phones can overheat too...
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