"I wonder if the energy cost of the TV screen and computer hardware will outweigh the savings of not opening the door as often or as long."
I'm not sure, the heat capacity of air is pretty low.
Assuming temp in the room is 25C and the air inside the fridge is at 4C we need to know the volume of air lost during each door opening, the difference in energy content of said air between 25C and 4C, and the efficiency of the refrigerator cooling circuit to remove that energy.
The volume of a standard fridge is about 500L (or 20 cubic feet) and we should assume the fridge is 1/2 full of stuff other than air, so 250L is the working volume. Heat capacity: Cp for dry air is about 1kJ/kg.K, at STP the density of air is 1.275 kg/m3. To do this exactly we have to integrate down from 25C to 4C taking into account the change in air density and the change in heat capacity. But we don't really have to do that to solve this problem, just assume Cp is constant, take the STP density, and work out how many joules have to be removed from 250L of air to cool it from 25C to 4C. The answer I got is 21kJ.
The final step is actually quite tricky as we don't know the energy efficiency of the refrigeration or the temperature difference between the refrigerator's hot side and the ambient temperature. A quick web search returns lots of values for total power consumption for refrigerators, but very little about the thermodynamic efficiency which is what we need to estimate the energy required to remove 21kJ from inside the refrigerator, plus we need to know the energy removal rate so we can convert this to power so we can compare to the power draw from the LCD and the computer.
Unfortunately, while I was just getting going, I have to stop now. Perhaps someone wants to finish it?
No, the script kiddie noticed that the fridge contents weren't changing after 2-3 days and sold the list of all vacant houses in the area to the local gang. The outcome could be a lot worse than just moldy milk.
"He likes to show but just want to go out in the rain, when there are less people on the street. (Or just want to make fun, which is the standard response to any attitude of who does bitching here)"
Thank you for the extra information. I agree entirely with the parent poster's spirit, though they did make a few mistakes over the double-taxation which you helpfully corrected.
However, your information on holidays while correct, still supports the parent poster's message: the US does not grant enough holiday time to its citizens to visit the world. As someone who has lived and worked in Australia, the USA, Canada, and the UK, I know that the USA was the absolute worst when it came to pay, benefits, and working conditions. And this was while filling a mixture of STEM project management and engineering positions. I could only pity those with less education and really feel for everyone in the USA struggling to get by.
So yes, I can see why some US citizens may wish to denounce their citizenship. But as you say, citizens of most other countries certainly wouldn't bother.
There was another poster here saying that they thought people should only hold citizenship of one country. I disagree with that statement. Though I'm probably in the minority: I don't believe anyone should have passports and that all borders should be open and free to cross. Everything (gears of society) should be based on where you physically are at the time, (no residency or citizenship requirements) so revenue is all earned through sales taxes, consumption taxes, land taxes and income taxes, and similar. Corporate taxes should be based on where the corporation is trading. If the company trades in a country then it must have an office/subsidiary in that country and it is against that office that the taxes are levied. There would be an exception for small (# employees, $ traded, etc...) companies that trade internationally. Of course some refinement is required.
A nice result of this outlook is that a society should earn enough from taxation based on its residents to provide all the services required. That revenue should scale with volume. The real benefit is that anyone should be able to walk into any hospital and receive treatment anywhere. Of course there will be cross-over as people out of jurisdiction receive services away from home, but the grown up response is to realise that on the whole it would all cancel out.
There are two trivial ways to do powers of ten in ASCII characters. 10^6 is one way, and can even be written long hand such as: 1.2345 x 10^6. The more compact form uses "e" for exponent and is called "scientific" or "engineering" notation, though some insist that "engineering" notation only allows multiples of 3 for the powers of ten. Anyway, I digress, use exponent notation like this: 1.234e6 or be explicit with the sign 1.234e+6 and for small values use 1.234e-6.
I think you were writing the range: "figures like 10^10 to 10^120 universe diameters"
I've watched it on slow motion now a handful of times. "Something" flies across the frame right at the time of the explosion, almost like an overflying aircraft dropped a bomb or something...what do people think?
I thought that's why revolvers had a heavy trigger pull, or a two-weight pull system? I'm no expert, but firing for the first time requires a very heavy pull, which while not a true safety makes the weapon much safer with a bullet in the revolver's current chamber. After each shot the pull is much less, as the hammer "self-cocks" due to the revolver action. To get the same effect on the first shot the operator can cock the pistol and apply the extra pull directly to the hammer with their thumb: which is the classic scene shown in many many movies. Once the arm is cocked in that fashion the trigger pull required to fire is significantly less.
Am I right about this? I live in a gun-free jurisdiction and can only remember what I learnt on a firearms course I took when I visited the USA.
"There is never a legitimate reason for someone to be breaking into your home. You should always assume they mean you harm (physcal damage, property damage/theft)."
Teenage daughter sneaking in after a night out with her boyfriend.
Said boyfriend trying to sneak in to meet with daughter.
House mate lost keys and is trying to climb through window.
Best friend with spare key gets kicked out by wife and needs to crash: no answer when he rings the front door, or it's 3am and he didn't want to wake you, just snuck in to get some kip on the couch before talking it over with you in the morning.
Family member wandering around sleep walking, general confusion, poor visibility, mistaken for intruder.
All of these scenarios are possible and would result in a tragic situation if you responded with lethal force. The question then is one of probability: do you think these scenarios are more or less likely compared to an armed intruder breaking into your house and stealing your shit and posing a threat to your safety? Where do you live? Port Moresby?
Google Translate: "The fucking Samanta goes away today? Bah, it was late this motherfucker. I'll put the rest of the wafer package in the trash, because I do not put my hand where this delayed puts it. If prorate will fill my mouth pereba."
I was speaking generally about workloads that most enthusiasts may encounter these days. I can go out for the weekend and shoot a few GB of photos and a few hundred GB of video very easily. Which you're right, isn't anywhere close to 10TB a week.
But when I wrote that post as well as exaggerating the data load I was also imagining that the user might make complete snapshots once a week: i.e. a full copy of everything. We both know that's a stupid way to do it, but it happens.
Heck: if I buy a new 10TB HDD and want to migrate everything over to it, then it will take a week to copy and I'll be facing the reality of potentially hidden and uncorrectable memory errors occurring during the copy simply based on the volume involved.
Look, I've never used LTO so I could be talking out my ass, but I must disagree with this:
"For the purposes of photos or video a 2:1 ration would be a safe assumption to use."
Compressed video uses some of of the most advanced domain-specific file compression routines available, without going to the fractal-based stuff that NASA uses. There is no way that LTO's compression (or any other general compression routine) is going to put a dent in a H.265 compressed video file.
JPEG may show a 15-20% improvement, since the new JPEG encoding that DropBox developed showed a 22% improvement so there is some wriggle room in JPEG.
However, from what I've read I am very confident that LTO compression does wonders for general office files: databases, spreadsheets, accounts, documents, server logs, and so on.
BTW, I found the posts about LTO to be very interesting and I think I may invest in a second hand tape drive and start using it. One way to get more mileage out of the unit will be to prepare backups for family and friends. Currently I maintain two file servers at remote locations (home and office) and allow friends and family to backup to them via DropBox. If I had an LTO drive I could simply take snapshots of the DropBox backup folder and send the tapes off site. The security of the backups are low-risk, since the data is already encrypted by the DropBox client before it even leaves the user's PC. I'm not really happy with DropBox but for now it fills a need. Maybe in the future I will switch to something more powerful like OwnCloud.
Slashdot Mirror
...next question?
"I wonder if the energy cost of the TV screen and computer hardware will outweigh the savings of not opening the door as often or as long."
I'm not sure, the heat capacity of air is pretty low.
Assuming temp in the room is 25C and the air inside the fridge is at 4C we need to know the volume of air lost during each door opening, the difference in energy content of said air between 25C and 4C, and the efficiency of the refrigerator cooling circuit to remove that energy.
The volume of a standard fridge is about 500L (or 20 cubic feet) and we should assume the fridge is 1/2 full of stuff other than air, so 250L is the working volume. Heat capacity: Cp for dry air is about 1kJ/kg.K, at STP the density of air is 1.275 kg/m3. To do this exactly we have to integrate down from 25C to 4C taking into account the change in air density and the change in heat capacity. But we don't really have to do that to solve this problem, just assume Cp is constant, take the STP density, and work out how many joules have to be removed from 250L of air to cool it from 25C to 4C. The answer I got is 21kJ.
The final step is actually quite tricky as we don't know the energy efficiency of the refrigeration or the temperature difference between the refrigerator's hot side and the ambient temperature. A quick web search returns lots of values for total power consumption for refrigerators, but very little about the thermodynamic efficiency which is what we need to estimate the energy required to remove 21kJ from inside the refrigerator, plus we need to know the energy removal rate so we can convert this to power so we can compare to the power draw from the LCD and the computer.
Unfortunately, while I was just getting going, I have to stop now. Perhaps someone wants to finish it?
If you live in a freezing climate then if it's a fridge-freezer then you need dual-thermostats, but otherwise, KISS is exactly the right approach.
No, the script kiddie noticed that the fridge contents weren't changing after 2-3 days and sold the list of all vacant houses in the area to the local gang. The outcome could be a lot worse than just moldy milk.
"Nothing on it is encrypted. NOTHING."
But that's the point: there's nothing on it.
Also, the user doesn't trust it because they know that it's not encrypted.
"He likes to show but just want to go out in the rain, when there are less people on the street. (Or just want to make fun, which is the standard response to any attitude of who does bitching here)"
Source: Google Translate.
Thank you for the extra information. I agree entirely with the parent poster's spirit, though they did make a few mistakes over the double-taxation which you helpfully corrected.
However, your information on holidays while correct, still supports the parent poster's message: the US does not grant enough holiday time to its citizens to visit the world. As someone who has lived and worked in Australia, the USA, Canada, and the UK, I know that the USA was the absolute worst when it came to pay, benefits, and working conditions. And this was while filling a mixture of STEM project management and engineering positions. I could only pity those with less education and really feel for everyone in the USA struggling to get by.
The difference is that US citizenship carries certain obligations. One such obligation is a requirement to file taxes in the US, irrespective of where you live. The US is only one of two countries with this requirement, the other is Eritrea.
So yes, I can see why some US citizens may wish to denounce their citizenship. But as you say, citizens of most other countries certainly wouldn't bother.
There was another poster here saying that they thought people should only hold citizenship of one country. I disagree with that statement. Though I'm probably in the minority: I don't believe anyone should have passports and that all borders should be open and free to cross. Everything (gears of society) should be based on where you physically are at the time, (no residency or citizenship requirements) so revenue is all earned through sales taxes, consumption taxes, land taxes and income taxes, and similar. Corporate taxes should be based on where the corporation is trading. If the company trades in a country then it must have an office/subsidiary in that country and it is against that office that the taxes are levied. There would be an exception for small (# employees, $ traded, etc...) companies that trade internationally. Of course some refinement is required.
A nice result of this outlook is that a society should earn enough from taxation based on its residents to provide all the services required. That revenue should scale with volume. The real benefit is that anyone should be able to walk into any hospital and receive treatment anywhere. Of course there will be cross-over as people out of jurisdiction receive services away from home, but the grown up response is to realise that on the whole it would all cancel out.
Seconded.
I transitioned to Sumatra PDF and never looked back.
Yes, the installer looks a bit ugly, but don't let that put you off, the software does exactly what you want: display and print PDF documents.
Not sure if it does PDF forms, I haven't had to do one in a while.
"I want to see what insurance company steps up to cover this thing"
None.
Insurance is not a requirement for anything. If the individual has enough cash to self insure then they can do whatever they like.
There are two trivial ways to do powers of ten in ASCII characters. 10^6 is one way, and can even be written long hand such as: 1.2345 x 10^6. The more compact form uses "e" for exponent and is called "scientific" or "engineering" notation, though some insist that "engineering" notation only allows multiples of 3 for the powers of ten. Anyway, I digress, use exponent notation like this: 1.234e6 or be explicit with the sign 1.234e+6 and for small values use 1.234e-6.
I think you were writing the range: "figures like 10^10 to 10^120 universe diameters"
As alarming as that may be, I checked the pixels but don't think it was shopped.
Can't decide if it's a bug or a terrorist drone strike...
My frame by frame analysis is inconclusive.
What do you think?
Thanks for the link to the video.
I've watched it on slow motion now a handful of times. "Something" flies across the frame right at the time of the explosion, almost like an overflying aircraft dropped a bomb or something...what do people think?
Here here, great post and well said.
Actually in mathematics we can prove that 3.33333333333repeating = 10/3 exactly.
Possible misuse of "collaborate"? We certainly "collaborate on" projects.
I thought that's why revolvers had a heavy trigger pull, or a two-weight pull system? I'm no expert, but firing for the first time requires a very heavy pull, which while not a true safety makes the weapon much safer with a bullet in the revolver's current chamber. After each shot the pull is much less, as the hammer "self-cocks" due to the revolver action. To get the same effect on the first shot the operator can cock the pistol and apply the extra pull directly to the hammer with their thumb: which is the classic scene shown in many many movies. Once the arm is cocked in that fashion the trigger pull required to fire is significantly less.
Am I right about this? I live in a gun-free jurisdiction and can only remember what I learnt on a firearms course I took when I visited the USA.
"There is never a legitimate reason for someone to be breaking into your home. You should always assume they mean you harm (physcal damage, property damage/theft)."
Teenage daughter sneaking in after a night out with her boyfriend.
Said boyfriend trying to sneak in to meet with daughter.
House mate lost keys and is trying to climb through window.
Best friend with spare key gets kicked out by wife and needs to crash: no answer when he rings the front door, or it's 3am and he didn't want to wake you, just snuck in to get some kip on the couch before talking it over with you in the morning.
Family member wandering around sleep walking, general confusion, poor visibility, mistaken for intruder.
All of these scenarios are possible and would result in a tragic situation if you responded with lethal force. The question then is one of probability: do you think these scenarios are more or less likely compared to an armed intruder breaking into your house and stealing your shit and posing a threat to your safety? Where do you live? Port Moresby?
Google Translate: "One of the reasons I like Fran is that it is able to break the face of that little shit of Helena to me."
Google Translate: "The fucking Samanta goes away today? Bah, it was late this motherfucker. I'll put the rest of the wafer package in the trash, because I do not put my hand where this delayed puts it. If prorate will fill my mouth pereba."
Thanks for posting the link through to YouTube: that guy is insufferable!
"With the volume of data commonly being handled"
I was speaking generally about workloads that most enthusiasts may encounter these days. I can go out for the weekend and shoot a few GB of photos and a few hundred GB of video very easily. Which you're right, isn't anywhere close to 10TB a week.
But when I wrote that post as well as exaggerating the data load I was also imagining that the user might make complete snapshots once a week: i.e. a full copy of everything. We both know that's a stupid way to do it, but it happens.
Heck: if I buy a new 10TB HDD and want to migrate everything over to it, then it will take a week to copy and I'll be facing the reality of potentially hidden and uncorrectable memory errors occurring during the copy simply based on the volume involved.
Anyway, we both agree: ECC for the win.
Thanks, looks like a great choice for a file server, especially if running ZFS.
Look, I've never used LTO so I could be talking out my ass, but I must disagree with this:
"For the purposes of photos or video a 2:1 ration would be a safe assumption to use."
Compressed video uses some of of the most advanced domain-specific file compression routines available, without going to the fractal-based stuff that NASA uses. There is no way that LTO's compression (or any other general compression routine) is going to put a dent in a H.265 compressed video file.
JPEG may show a 15-20% improvement, since the new JPEG encoding that DropBox developed showed a 22% improvement so there is some wriggle room in JPEG.
However, from what I've read I am very confident that LTO compression does wonders for general office files: databases, spreadsheets, accounts, documents, server logs, and so on.
BTW, I found the posts about LTO to be very interesting and I think I may invest in a second hand tape drive and start using it. One way to get more mileage out of the unit will be to prepare backups for family and friends. Currently I maintain two file servers at remote locations (home and office) and allow friends and family to backup to them via DropBox. If I had an LTO drive I could simply take snapshots of the DropBox backup folder and send the tapes off site. The security of the backups are low-risk, since the data is already encrypted by the DropBox client before it even leaves the user's PC. I'm not really happy with DropBox but for now it fills a need. Maybe in the future I will switch to something more powerful like OwnCloud.