Re: "Sleep", "Hibernate", etc. are engineering kludges.
Sleep and hibernate are kludges fixing the high idle power consumption.
141 posts • joined 18 Oct 2012
Sleep and hibernate are kludges fixing the high idle power consumption.
Right now, I'm browsing el reg while also frying pancakes.
After breakfast, it will be streaming some fast and loud music while I work in the garden
At that point battery level will be down to 66% or so, and it will get a short charge while I change clothes and head to actual work. At work, the phone will be streaming calming music or radio for 8 hours straight, after which the battery will be either dead or near dead.
Throw in web browsing, taking notes, emails, phonecalls, catching up on YouTube during breaks, etc..
This is actually done in Helsinki. Helsinki has both district heating and district cooling infrastructure, data centre heat is dumped into district heating.
The cool thing about district cooling is that it's mostly powered by unused "waste" heat from the district heating return. Thus, trigeneration powerplants reach extremely high efficiencies. Having 86 million litres of water to store heat and cold in also helps them run the powerplants at their optimum efficiency ratio regardless of the uneven demand on the different energy forms throughout the day.
Wake from sleep is measured in fractions if a second these days. You want to just open the lid or whatever, see if there are any messages or emails you need to read, and close it again. This entire process in preferably less than a second.
I think his current control and stabilisation system is more arduino-like than Pi-like.
While the Pi has powerful cpu and tons of ram, it's pretty starved in the I/O department.
The article mentioned hydrogen producing powder, cartridges, and modified headphone sockets.
I wonder if they've just replace headphone socket with orifice for inserting the cartridge. Presumably the cartridge stays inside until its hydrogen generating powder is spent.
I also wonder if the rate of hydrogen generation is fixed or variable, and whether generated hydrogen is storable or not.
If the answers are no, then it means the fuel cell will run empty after a week regardless of power consumption, and that very heavy users will drain the intermediate buffer battery even if fuel cell still has stored energy.
Streaming spotify will empty most phones in under 8 hours.
Well, instead of riding a tube undergoing a slow explosion, they also tested throwing bombs out the back of a spaceship and surfing the shockwaves from each bomb.
The tests were performed with TNT, but the final plan called for nuclear bombs. It was calculated that you would only need a few ten thousand nukes to get to Alpha Centauri. For some reason they never received permission to procure and detonate even a dozen nukes, and the project was shut down.
It was probably refering to a cable connected to the power supplying port on the powerbar. If that would be shorted, the dc-dc converter might be lefg running at its maximum capacity, heating up the battery it's sitting next to. If the converter lacks thermal cutoff, it will eventually enter runaway conditions, after which it's no longer converting, just passing through acting like a dead short itself. Temperature would increase to above the point where Li-Ion ignites..
I've wondered in general how PLC performs and is affected by the rather esoteric ring systems used ro wire UK households, compared to star topology used in the rest of the world.
Now PLC kit is even using the PE wire to transmit data, which is turning every chassis into a radiating antenna, I imagine.
Inherently unstable is actually true in a literal sense, the battery is eating itself up chemically after being manufactured, and will explode under use eventually.
Through limiting the temperature, current and voltage to specific limits, the point of explosion can be pushed to far beyond the battery's useful life.
Contaminations during manufacture typically shrink the safe temperature, voltage and current windows, making the safe windiw smaller than what the electronics is tuned for. The battery eventually reaches the point of explosion before it gets discarded as useless.
My main use of these kinds of things is making phone stream spotify/etc for a full workday. Excellent 3G coverage, shitty FM radio coverage.
I assume they mean that the satellite's batteries have now failed, which makes it go dead in darkness. In light, the panels provide ample power, and the satellite computer boots up again.
Then, instead of running chkdsk/fsck, it broadcasts a "Help Help! Systems failing!" call on the same frequency and protocol as aprs, the big amateur radio mesh network. And since the satellite is in space, its call is picked up by many many amateur radio ground stations, which presumably automatically all start relaying the message towards its destination, clogging up the frequency even more.
On the topic of Mayday calls from Space, at one point during a fire onboard the Mir space station, the crew had no contact with flight control. Half the crew started preparing the Soyuz for emergency evac, half started firefighting, which quite the challenge, as the fire extinguishers work quite well as rockets, pushing the user away tumbling. If they had ended up forced to abandon the station, their only means of communication at that time was their amateur radio kit. They'd have to hope that as they passed over America, some american Ham would pick up their call, and figure out how to get in touch with the russian space agency and tell them to look for their cosmonauts on the ground instead of in space.
Denmark's situation would probably be impossible without the hefty interconnects to sweden and particulary, Norway. The price of electricity has on several occasions on windy days gone negative in Denmark. Excess power is exported at near zero price to Norway. Norway idles its hydropower plants, and waits for the wind to srop blowing, at which point Denmark starts buying Norwegian hydro at ludicrously expensive prices. Win win for norwegian hydro, lose lose for the Danish consumer.
Overall, SpaceX fuel tanks are the lightest in the industry, and the engines have amazing thrust to weight ratio. All this means that without the payload, the booster stages are amazingly light, meanjng the fuel goed muuuuch much further.
The side boosters will be pumping fuel to the central core booster during flight, which means they'll detach earlier than what the first stage does now on vanilla Falcon 9, so for the side boosters, return will be easier and will require less fuel.
The central core, however, will need more fuel than current F9. For some missions they'll have to barge land or discard the central core, or all 3, depending on load and deployment orbit.
The published capacity (and price list!) for F9 takes into account fuel reserve needed for recovery. SpaceX has flown heavier loads than that though, without recovery attempts on first stage.
Let's see if third party Jolla phones enter unupgradium state like most androids and the firefox phones did.
It's hard to believe Broadwell was 2014 when availability is still so poor.
Well, they did test the "throw nukes out the back and ride the shockwave" idea, but with conventional explosives. If the world's nuclear weapons arsenal was appropriated for a spaceship, it could send a toddler to Alpha Centauri before the toddler's retirement age.
I would like to get a faster laptop, but Broadwell-H is unobtanium.
Communicating internal issues should obviously stay internal.
Socializing and talking about your day at work and how your boss must be reading Dilbert to be such s total copy of the PHB, is best not communicated inside a company, as I discovered.
NASA is contributing with the deep space network, as europe seems incapable of building a decent set of antennas.
The problem with machine learning is that once you run out of material to teach it, you wont make any further progress. And, of corurse, you can never be sure what the machine has learned, exactly.
The classical example (whether true or not) is the military attempt to teach a computer to spot tanks hidden in bushes. So they photographed lots of bushes with tanks, and lots of bushes without tanks. After some crunching, the computer was able to tell the difference.
Real life tests, however, failed utterly. Eventually someone noticed that all the pictures with tanks were taken on sunny days, and the other pictures on cloudy days. The computer had learned to tell the diference between nice weather and cloudy weather.
This is why you need a tremendous amount of data to train the machine with.
They can require a credit check before sales. The credit check agency of course identifies people by the national social security number only, which automatically excludes foreigners.
(This is hiw scandinavia does it)
It would be interesting to know if the Delphi car did anything except signal lane change before aborting, or if it had already started moving.
It can't deorbit the ISS with a collision. The required speed to do that would result in ISS getting a capsule sized hole through it. All the pieces would still be in orbit.
Spacecraft in general are optimized for the smallest possible mass, and tend to be "flimsy". You could probably kick or punch a hole in the ISS hull. A collision at any speed faster than a turtle is going to cause damage.
Once docked, if Dragon fired its thrusters for an hour or so it would make a significant impact on the ISS orbit.
i think the point of the article was that those businesses with a plan and contract were sent generators within 25 minutes. The lazy businesses took longer because they had to figure out first how big a generator they need, where to park it, and how to hook it up, etc.
Presumably there was a third class of people/businesses that never ordered generators and just waited for grid power.
Ok, so editing is clumsy on phone. We all knew that.
Is it also crippled on fullsize screens using physical keyboard?
And, after trying to use Polaris office, I must ask: Does it lose all your edits since last save if you briefly switch to another app?
Does wifi still in n, and ac versions, allow a single weak user to hog the band for ages?
One thing I liked about Wimax, was that it allocated a limited timeslot for each user wishing to transfer data, and if the signal was so weak the user only got a single packet through, then so be it, on to the next person in line to use the band.
As for spectrum, I'm not sure freeing up more spectrum will help much with congestion, people will just find more crap to remove wires from.
from the article, I get the impression they're basically using vdsl for basement to appartments.
Venn diagrams were made for this. Be sure to include a.bunch of random crackpot territorial claims too.
I admit I haven't followed thus extremely closely, but this is the first mention I've seen of an explosion?
And, of course, they're not putting cosmonauts in a Progress capsule, but Progress has alot in common with the Soyuz capsule that cosmonauts fly in.
So this more convenient form of optical memory than bouncing a laser beam via the reflectors left on the moon by apollo. That, btw, has been used as datastorage before.
Plastic better than aluminium? Oh, by mass maybe?
I bet if Pluto hadn't been demoted to backwater dwarfplanet they'd be able to get proper broadband.
Lithobraking is my new favourite word. I've been doing it alot since Kerbal Spaceprogram 1.0 was released.
Aw, I thought it was android apps on Windows Desktop.. But now I of course realize that even if it was on PC it would be behind the unusable TIFKAM.
When overcharged or overdischarged, the li-ion cell starts dissolving its copper, and producing metallic lithium. When the dissolved copper precipitates again, there's no telling where it ends up. If a shunt forms, it might cause localized heating and set off thermal runaway. As for metallic lithium, needless to say, it's highly volatile. The damage is accumulating.
RC Hobby people get relatively frequent battery fires, a consequence of running batteries without protection circuitry, and running batteries hard, making their base temperature already high, before builtin or evolved defects come into play.
Falcon 9 flying as planned and as expected for maximum payload to GTO. A change in plan would have been if first stage tried to re-enter atmosphere in a controlled manner somewhere halfway to Africa.
As for space race breakthrough, is the author talking about this being Turkmenistan's first satellite?
Nexus6 only because of the voice/sms over wifi, I think. The rest could be done for any cellphone with Google-operator SIM card.
In the 60s, the rockets fell/tumbled out of control and crashed into the ocean each and every time, well, except for the times they blew up on the pad. This still happens today, and rocket debris washes up on shores in south america. SpaceX is doing something new trying to do a powered softlanding.
Actually, your almost 3000mAh AA is made by some "computer wizard" with label editing "skills", changing 2000 to 3000 because "everyone else is doing it".
In the Li-on space, typical capacities for the classic 18650 size cell have gone from less than 1800mAh to today's 3100-3400 mAh for the premium cells from premium manufacturers, a doubling in capacity.
One thing that annoys me is how media frequently reports on "breakthroughs" in making a battery that charges in 5 minutes. Such Li-Ion batteries already exist, the capacity penalty you take for quick charge isn't even that big (Compared to supercapacitor capacities). Dumping that much power in 5 minutes requires some nice fat cables and chunky charge electronics, though. Your average usb cable would turn into a glowing white noodle in seconds.
If media reported on car tyres like they report on battery tech, every week there'd be a sensational post reporting on a new innovation, a new tyre that is rounder and not square. Every month there'd be reports of amazingly low friction tyres promising to save 75% energy, the boffins are calling it "railway". A couple of times a year there'd be reports on "out of the box" thinking derived "innovations", pht wings on the car, "inventing" the "aeroplane", and tyres are only used a short portion of the travel. Stick legs on the vehicle so it walks, no tyres needed at all, and no road infrastructure either, all problems solved forever!
I'm kinda surprised anyone at all cares about a burst in the 2.4GHz band, surely there will always be someone with random gadgets near telescopes?
Do websites that use baidu as ad provider share any responsibility for this?
I tried one of those too, but it was like watching a rsa key fob tick.
And yes, it had no clue about power factor, so it thought laptop power brick eats double what it really does, and idling wallwarts were overestimated by a factor 10 or so..
What good are fines, if operators aren't allowed to build coverage anyway?
How about maps of "We've set aside money to improve coverage here, but unfortunately we haven't received permission to do so"/"blocked by nimbys"
JC in anger management therapy? Now that's a tv show I'd watch, especially if it includes segments such as "staying calm driving behind pensioners in caravans".
I don't think any other country equated smart meters with remote control, everyone else is doing "advanced meter".
One directive I don't see mentioned on thereg though, is the one requiring damages and refunds for power outages. It has caused a building boom in Sweden and Finland atleast, with grid operators hurrying to bury electric cables underground so they don't need to pay out so much compensation for outages during storms.
Also, grounding yourself seems like the last thing you'd want to do.
Intel's graphics is the most popular graphics choice for PCs, makes sense to integrate it in their mainstream offer.
AMD moving to 16nm wont make you happy, by that time Intel will be measuring node size in atoms rather than nm. Both companies make CPUs that are "good enough", anyway.
I have a atom android tablet, and I must say the performance isn't as bad as I thought Atom would be. With performance I also mean batterylife. My Haswell-Y, however, is a bit disappointing.
Intel's kit previously had a price disadvantage, but now that that's fixed (temporarily?), intel is.looking useful.