I may end up putting a solar pre heater on the system. In SE Alaska it's a pretty marginal exercise but for most of the civilized world, it's a no brainer.
a kazillion homemade solar designs, including a lot of variations on a simple drain-back system which doesn't require antifreeze, but instead uses an unpressurized system that simply turns off the circulator pump and lets the water drain out of the collector and back into the insulated holding tank under situations where you would face freezing or heat loss...
i don't think that 25 year figure is correct. there seems to be quite a bit of FUD on the net about 'useful life' but this seems to be the only way the manufacturers can have the economics make sense. really, you have to look at warranties to get a sense of real world lifetimes.
i just took a quick and unscientific survey of the internets, and the tankless designs i saw have 1 year labor and 5 years parts warranty. i very much doubt that the units will last 20 years past their warranty period without continued repair.
my personal experience is that tankless heaters are very fussy and need much more maintenance than a tank heater, which needs almost none besides the replacement of the sacrificial electrodes occasionally, and then only if you want the tank to last far past the 10 year warranty.
one site i saw talked about a 20 year 'useful life' of the tankless heaters, but went on to explain that anyway when things do break, every single part is repairable or replaceable. unfortunately, at current plumber and parts cost, this can easily effectively triple or quadruple the unit's initial cost. also, at least rinnai, a major japanese manufacturer, says the units should be inspected and maintained every year, so you can add *at least* ( $100 * expected service life in years) to the cost of the units. that tank heater with the 10 year life and no service requirements is starting to sound quite a bit better, yes?
in summary, i think your figures are wrong- the info on the net, as well as my personal experience seem to suggest that tankless is a very expensive alternative.
again, a better solution is to insulate, consider solar (homemade equipment can set you up with a system to heat water and your house for under $1000!), and look at other, more cost effective technologies such as grey water heat recovery systems (http://energy.gov/energysaver/articles/drain-water-heat-recovery), which recover much of the heat from baths/showers, the biggest hot water use in a house, and have potentially only a couple of years payback.
i do wonder where you got that 25% increased efficiency figure, as that seems somewhat oversimplified as well.
there is way too much emotion in the energy conservation world. often the most effective solutions are not the sexy ones.
Water heaters should not be running at all unless someone is taking a shower. It is called on demand hot water, tank style heaters need to go. Normally this is gas fueled, not electric.
actually, on demand water is only slightly more efficient than a well insulated water tank heater, and i think the tradeoffs make it not worth the switch. effectively, the tank acts as an energy storage system, which means that you can use a much slower flow of energy over a longer time to heat the water. this instantaneous demand requirement means that the equipment is much more complicated and expensive to make, needs regular servicing, and has a shorter lifetime, meaning even more manufactured costs, not to mention reinstallation costs. also, since instantaneous heating demands are *much* higher than conventional heater requirements, often a new exhaust flue, and sometimes even a new incoming gas pipe of larger size must be run for the install.
it is more important to make sure your existing heater and all your hot water pipes are very well insulated, and if you really want to spend money in pursuit of efficiency, get a solar water heating system if your climate and situation allow.
in order of importance, fragility, price and density.
put some spare mattresses on the floor/sides of the uhaul and put your servers down there. next to each other. (you do have mattresses, right? you're a retreat center and a big fire is coming...) next desktop boxes, lined up next to each other. on top networking and ip phones, combined into a few bags/pillowcases etc. these, particularly the phones are light and wont damage each other. next screens, wrapped in blankets and stabilized. you'll find the screens most fragile, and requiring the most careful packing, but they are also not so expensive to replace so don't worry too much.
come to think of it, you probably can throw some meditation pillows in there between the screens and anywhere else you need them.
that should give you a fast pack of everything critical. you also hopefully have made offsite backups, though.
Actually, it isn't. In 1844, in the interests of segregating passenger train and road traffic, a rail tunnel was built under the roadbed of Atlantic Avenue, in what was then the independent city of Brooklyn, New York. There is a reply to the OP suggesting that Liverpool has some earlier tunnels than this, but in any case, it would seem that Brooklyn significantly predates the London underground train system.
Americans Elect's board is primarily staffed by the far right. This is simply an effort to split the liberal vote. Go look it up; it's pretty easy to find that Americans Elect's board alone makes it untrustworthy.
actually, this is FUD, and isn't at all correct. the board are political and money people, and of the independent / moderate / better world persuasion.
Peter Ackerman, the chairman and a founder, works on wall street, and also was previously associated with Freedom House, which was started by Eleanor Roosevelt, and which does research and advocacy for human rights and political freedom. He also has co-founded the American Center on Nonviolent Conflict, which "promotes the study and utilization of nonmilitary strategies by civilian-based movements to establish and defend human rights, social justice and democracy".
I'm not sure where you get far right and untrustworthy out of that, but if you mean that Americans Elect are trying to provide a voice that isn't of and filtered by the existing two dysfunctional self interested politics parties, i'm all for that kind of untrustworthy.
you are willing to sound off in a hugely popular internet forum currently discussing politics... about how the internet is irrelevant to politics? (and then you go on to basically say that all modern politics are programmed, and way right wing, and suck, anyway.)
i guess you won't be happy till it is all overthrown, so why even bother with the curmudgeonly (and not very useful) postings...
moderators, what exactly were you thinking w the mod points on this guy?
There is something a little odd about this particular update-- Safari on my Mac had been acting very strangely lately-sucking up lots of processor, computer acting a bit odd. This is unusual. This seems to have been fixed by the update. Maybe just a coincidence?
The question is: why is Apple so quiet about rolling this update out and what it fixes, and since when does a minor Safari update require a reboot?!!
i really really wanted to like mulberry, and tried several versions extensively over the years, but so hated the illogical interface, the buckshot approach to features, the crashing, the inability to cache correctly, and the companies propensity to add major new features (calendar, etc) rather than properly working out the bugs and logic burps in the old ones, made me finally switch to thunderbird for IMAP. not great but again, not bad at all...
yes- i agree, but that still leaves it completely open as to what they choose to consider (or ignore as) a running window in the task bar.
i believe the other posts on this subject discuss how most brazilians will probably just use the bootleg regular verson of windows, so this one will likely just make life difficult for people who wish to run things other than ms programs on their windows computers...
it is going to be interesting to see what happens.
this arbitrary 3 process limit could be used as part of a typical M$ ploy to eliminate the open source compentition-- for example, they might well configure SE to count all separate apps in office as one app and open office as 6 discreet ones, or whatever. what better way than to have a too low limit, and then make exception for their own products.
just the sort of slimy thing that they are famous for...
So don't use the extremist ones like SPEWS. There are plenty of other DNSBLs to choose from.
In a sane world, your response would be correct. Everyone could choose their own degree of filtering.
Unfortunately, that just isn't the case. I can't control the degree of filtering that happens that the compay where I work, as I'm not a member of IT. Furthermore, I cannot control the degree of filtering that happens to other people that I need to send mail to from *their* IT departments.
you will almost never have control of the technology decisions made by your mis department (unless you happen to run the mis department.) the fact that they have made a technical decision that you don't like, or one that inconveniences you actually has nothing to do with the this technology that, in your opinion, they are misusing.
there are a whole range of ip lists, from the ineffective to the extreme. these list can be used in a whole variety of ways, again, ranging from the ineffective to the draconian. taking the middle ground on all this results in a number of moderate technical compromises that keep most people fairly happy.
just because you are pissed off at the way your mis department has used the technology should in no logical way be a reflection on the validity or potential of the technology.
the very fact that the spammers are attacking the keepers of these lists is proof that they are somehow being used in some reasonably functional way in the world, and that this is having a serious impact on spammers.
i tried it for a while recently and follow the development list. they are more experemental and theoretical than solid and practical, in my experience.
i wish it wasn't so, but it is...
Re:A useful general power solution too
on
Solar Window Panes
·
· Score: 1
that is good, because putting these in the relatively small percent of a building that is window space wouldn't be such a hot idea. first of all, 100% efficency is impossible due to conversion losses etc etc, unless there is some incredibly new noble prize level development involved.
that means you are blocking light to produce it again with some energy loss deeper in the room, among other things. why have the radiative energy loss of large windows that are partially blocked? if you are going to do this, have smaller windows and the rest of the building covered in this material.
yes, but they are pretty expensive, so with initial disappointing sales due to the cost/performance issue in extremely practical countries like switzerland, they needed to find a market where people cared more about looks and coolness than cost.... turns out the marketing push in italy was extremely sucessful.
(and i'm more or less italian, so don't jump on me)
as suggested repeatedly above, the point is to bring users who are familiar and comfortable with the windows interface into the *nix fold. whether or whether not it is possible to have a better interface than windows (certainly it is!) is not the issue at all with respect to this project. given the choice between a windows interface on a somewhat slow, expensive operating system and the same on a free, more dependable one, the choice becomes pretty simple. the next stage would be to switch to another interface. (and wow, it turns out to be easy and fast to do this in the new os:)
my friend lives half the year in vermont and half the year in california. his site is physically hosted in virginia. what would he be supposed to enter for his website location?
this site might not always make much sense for individuals. the situation is similar to that of american telephone area codes; in our highly traveled world they are starting to lose their value as a location indicator, what with mobile phones, choice of area codes for faxes etc, and (in theory) relocatable phone numbers.
you can choose a location, but it might only be true sometimes.
better to link it to your frequent flyer number, perhaps?
then I tried Mozilla's Chaimera.
if you like mozilla's speed, then you'll love Opera. on pc they just came out with a new version 7 (early beta so still a little bit crashy) that is unbelievably fast and completely configurable so you can fit it to your browsing style. even their previous version, Opera 6, is great!
i wonder about the relationship between this and the standard keepalive protocol, which basically is a standard that keeps a connection open for a certain amount of time so the browser doesn't have to keep opening new tcp connections for each image or whatever. i would assume that the keepalive protocol reduces the ill effects of this system, since once a connection is made it doesn't have to be torn down and reestablished, or at least not for each request.
Slashdot Mirror
Yea! what ever happened to "Take only pictures. Leave only footsteps." ?
I mean, imprinting "JPL" in morse code over and over in the martian dust counts as footsteps, I guess, but....
I may end up putting a solar pre heater on the system. In SE Alaska it's a pretty marginal exercise but for most of the civilized world, it's a no brainer.
coldwetdog - have you ever checked out http://builditsolar.com/ ?
a kazillion homemade solar designs, including a lot of variations on a simple drain-back system which doesn't require antifreeze, but instead uses an unpressurized system that simply turns off the circulator pump and lets the water drain out of the collector and back into the insulated holding tank under situations where you would face freezing or heat loss...
i don't think that 25 year figure is correct. there seems to be quite a bit of FUD on the net about 'useful life' but this seems to be the only way the manufacturers can have the economics make sense. really, you have to look at warranties to get a sense of real world lifetimes.
i just took a quick and unscientific survey of the internets, and the tankless designs i saw have 1 year labor and 5 years parts warranty. i very much doubt that the units will last 20 years past their warranty period without continued repair.
my personal experience is that tankless heaters are very fussy and need much more maintenance than a tank heater, which needs almost none besides the replacement of the sacrificial electrodes occasionally, and then only if you want the tank to last far past the 10 year warranty.
one site i saw talked about a 20 year 'useful life' of the tankless heaters, but went on to explain that anyway when things do break, every single part is repairable or replaceable. unfortunately, at current plumber and parts cost, this can easily effectively triple or quadruple the unit's initial cost. also, at least rinnai, a major japanese manufacturer, says the units should be inspected and maintained every year, so you can add *at least* ( $100 * expected service life in years) to the cost of the units. that tank heater with the 10 year life and no service requirements is starting to sound quite a bit better, yes?
in summary, i think your figures are wrong- the info on the net, as well as my personal experience seem to suggest that tankless is a very expensive alternative.
again, a better solution is to insulate, consider solar (homemade equipment can set you up with a system to heat water and your house for under $1000!), and look at other, more cost effective technologies such as grey water heat recovery systems (http://energy.gov/energysaver/articles/drain-water-heat-recovery), which recover much of the heat from baths/showers, the biggest hot water use in a house, and have potentially only a couple of years payback.
i do wonder where you got that 25% increased efficiency figure, as that seems somewhat oversimplified as well.
there is way too much emotion in the energy conservation world. often the most effective solutions are not the sexy ones.
Water heaters should not be running at all unless someone is taking a shower. It is called on demand hot water, tank style heaters need to go. Normally this is gas fueled, not electric.
actually, on demand water is only slightly more efficient than a well insulated water tank heater, and i think the tradeoffs make it not worth the switch. effectively, the tank acts as an energy storage system, which means that you can use a much slower flow of energy over a longer time to heat the water.
this instantaneous demand requirement means that the equipment is much more complicated and expensive to make, needs regular servicing, and has a shorter lifetime, meaning even more manufactured costs, not to mention reinstallation costs. also, since instantaneous heating demands are *much* higher than conventional heater requirements, often a new exhaust flue, and sometimes even a new incoming gas pipe of larger size must be run for the install.
it is more important to make sure your existing heater and all your hot water pipes are very well insulated, and if you really want to spend money in pursuit of efficiency, get a solar water heating system if your climate and situation allow.
in order of importance, fragility, price and density.
put some spare mattresses on the floor/sides of the uhaul and put your servers down there. next to each other. (you do have mattresses, right? you're a retreat center and a big fire is coming...)
next desktop boxes, lined up next to each other.
on top networking and ip phones, combined into a few bags/pillowcases etc. these, particularly the phones are light and wont damage each other.
next screens, wrapped in blankets and stabilized. you'll find the screens most fragile, and requiring the most careful packing, but they are also not so expensive to replace so don't worry too much.
come to think of it, you probably can throw some meditation pillows in there between the screens and anywhere else you need them.
that should give you a fast pack of everything critical. you also hopefully have made offsite backups, though.
Actually, it isn't. In 1844, in the interests of segregating passenger train and road traffic, a rail tunnel was built under the roadbed of Atlantic Avenue, in what was then the independent city of Brooklyn, New York. There is a reply to the OP suggesting that Liverpool has some earlier tunnels than this, but in any case, it would seem that Brooklyn significantly predates the London underground train system.
Americans Elect's board is primarily staffed by the far right. This is simply an effort to split the liberal vote. Go look it up; it's pretty easy to find that Americans Elect's board alone makes it untrustworthy.
actually, this is FUD, and isn't at all correct. the board are political and money people, and of the independent / moderate / better world persuasion.
Peter Ackerman, the chairman and a founder, works on wall street, and also was previously associated with Freedom House, which was started by Eleanor Roosevelt, and which does research and advocacy for human rights and political freedom. He also has co-founded the American Center on Nonviolent Conflict, which "promotes the study and utilization of nonmilitary strategies by civilian-based movements to establish and defend human rights, social justice and democracy".
I'm not sure where you get far right and untrustworthy out of that, but if you mean that Americans Elect are trying to provide a voice that isn't of and filtered by the existing two dysfunctional self interested politics parties, i'm all for that kind of untrustworthy.
mod score 5. really?
you are willing to sound off in a hugely popular internet forum currently discussing politics... about how the internet is irrelevant to politics?
(and then you go on to basically say that all modern politics are programmed, and way right wing, and suck, anyway.)
i guess you won't be happy till it is all overthrown, so why even bother with the curmudgeonly (and not very useful) postings...
moderators, what exactly were you thinking w the mod points on this guy?
There is something a little odd about this particular update-- Safari on my Mac had been acting very strangely lately-sucking up lots of processor, computer acting a bit odd. This is unusual. This seems to have been fixed by the update. Maybe just a coincidence?
The question is: why is Apple so quiet about rolling this update out and what it fixes, and since when does a minor Safari update require a reboot?!!
If 1 gram of graphene has the surface area of a football field, what's the surface area of a football field of graphene?
47 Libraries of Congress, of course!
anyway, rest in peace folks
yes- i agree, but that still leaves it completely open as to what they choose to consider (or ignore as) a running window in the task bar.
i believe the other posts on this subject discuss how most brazilians will probably just use the bootleg regular verson of windows, so this one will likely just make life difficult for people who wish to run things other than ms programs on their windows computers...
it is going to be interesting to see what happens.
this arbitrary 3 process limit could be used as part of a typical M$ ploy to eliminate the open source compentition-- for example, they might well configure SE to count all separate apps in office as one app and open office as 6 discreet ones, or whatever. what better way than to have a too low limit, and then make exception for their own products.
just the sort of slimy thing that they are famous for...
The reason people constantly point out problems like this is that they just keep happening in US Aerospace programs.
umm- has anyone seen my beagle?
to get rid of sonnet ring around the collar?
In a sane world, your response would be correct. Everyone could choose their own degree of filtering.
Unfortunately, that just isn't the case. I can't control the degree of filtering that happens that the compay where I work, as I'm not a member of IT. Furthermore, I cannot control the degree of filtering that happens to other people that I need to send mail to from *their* IT departments.
you will almost never have control of the technology decisions made by your mis department (unless you happen to run the mis department.) the fact that they have made a technical decision that you don't like, or one that inconveniences you actually has nothing to do with the this technology that, in your opinion, they are misusing.
there are a whole range of ip lists, from the ineffective to the extreme. these list can be used in a whole variety of ways, again, ranging from the ineffective to the draconian. taking the middle ground on all this results in a number of moderate technical compromises that keep most people fairly happy.
just because you are pissed off at the way your mis department has used the technology should in no logical way be a reflection on the validity or potential of the technology.
the very fact that the spammers are attacking the keepers of these lists is proof that they are somehow being used in some reasonably functional way in the world, and that this is having a serious impact on spammers.
yes, maybe if you had used scsi or usb...
i tried it for a while recently and follow the development list. they are more experemental and theoretical than solid and practical, in my experience.
i wish it wasn't so, but it is...
that is good, because putting these in the relatively small percent of a building that is window space wouldn't be such a hot idea. first of all, 100% efficency is impossible due to conversion losses etc etc, unless there is some incredibly new noble prize level development involved.
that means you are blocking light to produce it again with some energy loss deeper in the room, among other things. why have the radiative energy loss of large windows that are partially blocked? if you are going to do this, have smaller windows and the rest of the building covered in this material.
yes, but they are pretty expensive, so with initial disappointing sales due to the cost/performance issue in extremely practical countries like switzerland, they needed to find a market where people cared more about looks and coolness than cost. ... turns out the marketing push in italy was extremely sucessful.
(and i'm more or less italian, so don't jump on me)
matteo
yes!
didn't the french invent good, helpful service?
as suggested repeatedly above, the point is to bring users who are familiar and comfortable with the windows interface into the *nix fold. whether or whether not it is possible to have a better interface than windows (certainly it is!) is not the issue at all with respect to this project. given the choice between a windows interface on a somewhat slow, expensive operating system and the same on a free, more dependable one, the choice becomes pretty simple. the next stage would be to switch to another interface. (and wow, it turns out to be easy and fast to do this in the new os :)
this site might not always make much sense for individuals. the situation is similar to that of american telephone area codes; in our highly traveled world they are starting to lose their value as a location indicator, what with mobile phones, choice of area codes for faxes etc, and (in theory) relocatable phone numbers. you can choose a location, but it might only be true sometimes.
better to link it to your frequent flyer number, perhaps?
then I tried Mozilla's Chaimera.
if you like mozilla's speed, then you'll love Opera. on pc they just came out with a new version 7 (early beta so still a little bit crashy) that is unbelievably fast and completely configurable so you can fit it to your browsing style. even their previous version, Opera 6, is great!
i wonder about the relationship between this and the standard keepalive protocol, which basically is a standard that keeps a connection open for a certain amount of time so the browser doesn't have to keep opening new tcp connections for each image or whatever.
i would assume that the keepalive protocol reduces the ill effects of this system, since once a connection is made it doesn't have to be torn down and reestablished, or at least not for each request.