It's funny then how eMusic, despite only exploiting the 'long tail', is the number 2 music store behind iTMS - easily beating all the online music stores selling the popular stuff. Of course, that might have something to do with eMusic being the only music store other than iTMS which sells music that will play on an iPod.
Others have picked holes in what you've said already, but I think the company producing the Mosquito severely underestimate the number of people who can still happily hear 15kHz. I can quite happily hear the flyback in my TV (which produces a 15.something kHz whine). My 58-year old father can still hear 15kHz quite happily, despite having abused his hearing working in factories in the '70s with no hearing protection (and racing motorcycles with open mega exhausts).
What you were doing in your own time was working to allow other students subvert school policies during school time. Damn right you should have been punished.
VNC isn't secure in the same way that HTTP isn't secure: anyone in the middle can happily snoop and harvest passwords (and the password encryption on VNC is very weak too).
You can't detect non-HTTP traffic over HTTPS because it's end to end encrypted - you can't actually tell what the payload is. The client just does an HTTP CONNECT on the proxy. You can make ugly workarounds on the proxy (such as very short timeouts to attempt to make SSH on port 443 not work), but these workarounds are trivial to defeat with a little bit of coding.
If you teach students the gory details of networking, you HAVE taught them how to snoop. You can't really separate them. For the most part, those students who want to snoop will learn it off their own back if you don't teach them.
By inquiring, you were certainly showing intent to violate your college's TOS - it's hardly surprising you were punished.
If you're going to make public inquiries on how to crack someone's security, then make damned sure that you do it anonymously and not in a way that will tip off anyone who's security you are wanting to crack.
Personally, if I were the sysadmin, instead of having you punished pre-emptively, I'd have watched you and waited until you actually attempted to break the security, because then I could have the book thrown at you much, much harder. But then again, I went to the BOFH school of sysadmins.
The 1980s Domesday Project is available online - it's still perfectly readable. The biggest problem with getting the Domesday Project online was *not* reading the data - it was COPYRIGHTS (and finding all the copyright holders down to get permission).
Don't be so sure. I'm 34 and can hear it perfectly clearly. When they played it on BBC Radio 4, people in their 60s were calling in saying they can hear it perfectly well.
OT: about your signature - for easy (i.e. Windows install shield style) installs, Linux already has Autopackage. I use it for Oolite. Works very well. Quite a few projects are now using it for distro-independent installers.
The Daily Mail is the Sun for the permanently offended and ignorant middle Englanders. It's an appaling rag, and has been for as long as I can remember.
When I was about 9 or 10, I was in the school dining room. One of the items we had on the menu was one of those little tetra-brik carton thingies of fruit juice. After I finished it, I thought it would be a wonderful idea to put the packet on the floor and stamp on it. Since the packages are fairly tough, it went off with a very loud bang.
The entire dining room of perhaps 200 kids fell instantly silent.
Somehow teachers can tell a guilty look from 100 feet. I was thrown out of the dining room, meal unfinished.
Later on (like when I was 17), I almost got suspended for making bombs with illegal German firecrackers and potassium nitrate soaked paper. If there was the slightest bang - someone popping a crisp packet, or stamping on a tetra-brik, school staff would suddenly congregate around me and my partner in crime. We were always the first suspects for anything vaguely explosion sounding! Today, I bet the Police would be called.
It's funny. During the height of the IRA terror campaign, there was no need for the police to be called for things like this, but now - despite these extremists killing a tiny fraction of the number the IRA killed, all of a sudden it's terror-terror-terror and the slightest schoolboy prank sparks accusations of terrorist activities and DNA sampling.
Lighters aren't usually restricted because of smoking - but substance abuse. People get high on the butane. I'm not saying it's right - I was a bit annoyed when I was denied buying a can of butane when I was 17 (being a geek, I had a gas powered soldering iron, and I was out of gas). To make it more annoying, it was the shop I usually bought the gas from (perhaps due to the frequency of my visits they decided I must have been sniffing the stuff, but regular use of the soldering iron/blowtorch quickly went through the stuff). I just started patronising another store instead who didn't check ID.
The extract from two beans off Ricinus communis is enough to kill an adult. However, it's often grown as a garden plant. Make sure your children know not to go chewing on this one!
It's all pretty irrelevant to Joe Public anyway - there was sufficient power for writing letters and browsing the web a decade ago. More memory and faster disks generally benefit Joe Public more.
A correction: with a grid tied inverter (i.e. what you need to feed power back out to the grid) if there's a blackout, you won't have power either - so if there's a blackout, your're still SOL if you want to sell the power back.
But 20kW of solar photovoltaics is not 20kW due to the intermittent nature of sunlight (none at night) so if you want to run your airconditioner off solar photovoltaic - unless you want sweaty nights, you're going to need at least twice the solar photovoltaic capacity that the air conditioner actually needs (probably more if you want to account for partial cloud cover) - and a shedload of electricity storage.
If all you want to do is make a dent in the power consumption of the AC, then sure - you need less than 20kW of solar capacity. (It also depends on how big the house is of course). However, if you want to run all your AC needs of solar panels you will need significantly more solar than the AC's average power draw.
It's not a shitload for an *air conditioned* house though (the original purpose for the solar in this thread was to run air conditioning). AC is extremely power hungry, and you generally need with solar a good deal more capacity than the power draw of whatever you're running due to passing clouds and hours of darkness, storage losses, inverter losses etc.
A roof mounted wind turbine would take a lot less roof space than roof mounted solar panels (and be far easier to mount), and in the case of office buildings, make a much larger contribution (multi storey office buildings tend to have comparatively little roof space compared to floor space).
It's a common myth that wind turbines "slaughter" birds - a very small number of birds are killed by wind turbines: http://www.treehugger.com/files/2006/04/common_mis conce.php . Building microgeneration schemes are highly unlikely to be in bird flight paths - birds of prey don't generally congregate in urban areas!
I'm afraid it's a bit naive to think you can pay a lot for solar and forget about it.
The panels eventually do fail/wear out. They do last a long time - most are guaranteed to still produce 80% of their rated output when 25 years old. Cells will fail and will need replacing from time to time, and will be expensive to do. So you have to *keep* paying a lot time and time again. Also, you need somewhere to store the energy for later - home energy usage is pretty much the exact inverse of when the most solar radiation is available - where I live, you need the most electricity in the winter when it doesn't get light till 9am and is dark by 4pm - so you need to store the power during the day for your peak night time usage. The most cost effective way of doing this currently is deep cycle lead acid batteries (since you don't care about weight as it's in a building). Try pricing up enough lead acid batteries to be able to get you through a week of shitty, dark, rainy winter weather just when you need the power the most. Then realise you'll probably have to replace the whole set of batteries every 8 years (and that's optimistic). And factor in the energy cost to make and (preferably recycle) those batteries.
Solar is fine for running small things; I am considering it for running outside lighting and things like the pond pump - the whole thing only needs one 120W panel and a leisure battery, inverter and controller - and in the winter time when the solar energy isn't very abundant, I'm hardly going to need the power anyway. However, for serious microgeneration, at the current time the only halfway practical and affordable renewable energy source is wind, which is vastly cheaper - and when you need the power most, it also tends to be windy, so the energy availability actually matches domestic energy usage much better. Wind also has a much better energy payoff. The energy to make a typical wind turbine is generated by the turbine over a period of six months - it's more like 6 years for solar. Unless photo voltaic solar becomes vastly cheaper, it's simply a non-contender except for novelty value, even if you live in the desert.
But that's still not radiant cold. You can't have a radiant cooler. If radiant heating is being done then it's the surroundings heating the cooler parts - the warmer surroundings are doing the radiating, not the thing that's cold.
Additionally, before you flame also check your maths. EUR9000 per 2kW is still EUR 90,000 per 20kW - converted to AU$, that's still over $150,000 for 20kW - which I maintain is ruinously expensive for that much power.
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It's funny then how eMusic, despite only exploiting the 'long tail', is the number 2 music store behind iTMS - easily beating all the online music stores selling the popular stuff. Of course, that might have something to do with eMusic being the only music store other than iTMS which sells music that will play on an iPod.
Others have picked holes in what you've said already, but I think the company producing the Mosquito severely underestimate the number of people who can still happily hear 15kHz. I can quite happily hear the flyback in my TV (which produces a 15.something kHz whine). My 58-year old father can still hear 15kHz quite happily, despite having abused his hearing working in factories in the '70s with no hearing protection (and racing motorcycles with open mega exhausts).
The Floggings Will Continue Until Morale Improves.
In the meantime, you just fired your most productive developer who was doing some research on a problem he needed to solve.
What you were doing in your own time was working to allow other students subvert school policies during school time. Damn right you should have been punished.
VNC isn't secure in the same way that HTTP isn't secure: anyone in the middle can happily snoop and harvest passwords (and the password encryption on VNC is very weak too).
You can't detect non-HTTP traffic over HTTPS because it's end to end encrypted - you can't actually tell what the payload is. The client just does an HTTP CONNECT on the proxy. You can make ugly workarounds on the proxy (such as very short timeouts to attempt to make SSH on port 443 not work), but these workarounds are trivial to defeat with a little bit of coding.
If you teach students the gory details of networking, you HAVE taught them how to snoop. You can't really separate them. For the most part, those students who want to snoop will learn it off their own back if you don't teach them.
Why not use nslookup instead of ping?
By inquiring, you were certainly showing intent to violate your college's TOS - it's hardly surprising you were punished.
If you're going to make public inquiries on how to crack someone's security, then make damned sure that you do it anonymously and not in a way that will tip off anyone who's security you are wanting to crack.
Personally, if I were the sysadmin, instead of having you punished pre-emptively, I'd have watched you and waited until you actually attempted to break the security, because then I could have the book thrown at you much, much harder. But then again, I went to the BOFH school of sysadmins.
http://www.domesday1986.com/
The 1980s Domesday Project is available online - it's still perfectly readable.
The biggest problem with getting the Domesday Project online was *not* reading the data - it was COPYRIGHTS (and finding all the copyright holders down to get permission).
You can use the 1986 Domesday project here: http://www.domesday1986.com/
Don't be so sure. I'm 34 and can hear it perfectly clearly. When they played it on BBC Radio 4, people in their 60s were calling in saying they can hear it perfectly well.
OT: about your signature - for easy (i.e. Windows install shield style) installs, Linux already has Autopackage. I use it for Oolite. Works very well. Quite a few projects are now using it for distro-independent installers.
http://autopackage.org/
The Daily Mail is the Sun for the permanently offended and ignorant middle Englanders. It's an appaling rag, and has been for as long as I can remember.
When I was about 9 or 10, I was in the school dining room. One of the items we had on the menu was one of those little tetra-brik carton thingies of fruit juice. After I finished it, I thought it would be a wonderful idea to put the packet on the floor and stamp on it. Since the packages are fairly tough, it went off with a very loud bang.
The entire dining room of perhaps 200 kids fell instantly silent.
Somehow teachers can tell a guilty look from 100 feet. I was thrown out of the dining room, meal unfinished.
Later on (like when I was 17), I almost got suspended for making bombs with illegal German firecrackers and potassium nitrate soaked paper. If there was the slightest bang - someone popping a crisp packet, or stamping on a tetra-brik, school staff would suddenly congregate around me and my partner in crime. We were always the first suspects for anything vaguely explosion sounding! Today, I bet the Police would be called.
It's funny. During the height of the IRA terror campaign, there was no need for the police to be called for things like this, but now - despite these extremists killing a tiny fraction of the number the IRA killed, all of a sudden it's terror-terror-terror and the slightest schoolboy prank sparks accusations of terrorist activities and DNA sampling.
Lighters aren't usually restricted because of smoking - but substance abuse. People get high on the butane. I'm not saying it's right - I was a bit annoyed when I was denied buying a can of butane when I was 17 (being a geek, I had a gas powered soldering iron, and I was out of gas). To make it more annoying, it was the shop I usually bought the gas from (perhaps due to the frequency of my visits they decided I must have been sniffing the stuff, but regular use of the soldering iron/blowtorch quickly went through the stuff). I just started patronising another store instead who didn't check ID.
The extract from two beans off Ricinus communis is enough to kill an adult. However, it's often grown as a garden plant. Make sure your children know not to go chewing on this one!
It's all pretty irrelevant to Joe Public anyway - there was sufficient power for writing letters and browsing the web a decade ago. More memory and faster disks generally benefit Joe Public more.
A correction: with a grid tied inverter (i.e. what you need to feed power back out to the grid) if there's a blackout, you won't have power either - so if there's a blackout, your're still SOL if you want to sell the power back.
But 20kW of solar photovoltaics is not 20kW due to the intermittent nature of sunlight (none at night) so if you want to run your airconditioner off solar photovoltaic - unless you want sweaty nights, you're going to need at least twice the solar photovoltaic capacity that the air conditioner actually needs (probably more if you want to account for partial cloud cover) - and a shedload of electricity storage.
If all you want to do is make a dent in the power consumption of the AC, then sure - you need less than 20kW of solar capacity. (It also depends on how big the house is of course). However, if you want to run all your AC needs of solar panels you will need significantly more solar than the AC's average power draw.
It's not a shitload for an *air conditioned* house though (the original purpose for the solar in this thread was to run air conditioning). AC is extremely power hungry, and you generally need with solar a good deal more capacity than the power draw of whatever you're running due to passing clouds and hours of darkness, storage losses, inverter losses etc.
A roof mounted wind turbine would take a lot less roof space than roof mounted solar panels (and be far easier to mount), and in the case of office buildings, make a much larger contribution (multi storey office buildings tend to have comparatively little roof space compared to floor space).
s conce.php . Building microgeneration schemes are highly unlikely to be in bird flight paths - birds of prey don't generally congregate in urban areas!
It's a common myth that wind turbines "slaughter" birds - a very small number of birds are killed by wind turbines: http://www.treehugger.com/files/2006/04/common_mi
I'm afraid it's a bit naive to think you can pay a lot for solar and forget about it.
The panels eventually do fail/wear out. They do last a long time - most are guaranteed to still produce 80% of their rated output when 25 years old. Cells will fail and will need replacing from time to time, and will be expensive to do. So you have to *keep* paying a lot time and time again. Also, you need somewhere to store the energy for later - home energy usage is pretty much the exact inverse of when the most solar radiation is available - where I live, you need the most electricity in the winter when it doesn't get light till 9am and is dark by 4pm - so you need to store the power during the day for your peak night time usage. The most cost effective way of doing this currently is deep cycle lead acid batteries (since you don't care about weight as it's in a building). Try pricing up enough lead acid batteries to be able to get you through a week of shitty, dark, rainy winter weather just when you need the power the most. Then realise you'll probably have to replace the whole set of batteries every 8 years (and that's optimistic). And factor in the energy cost to make and (preferably recycle) those batteries.
Solar is fine for running small things; I am considering it for running outside lighting and things like the pond pump - the whole thing only needs one 120W panel and a leisure battery, inverter and controller - and in the winter time when the solar energy isn't very abundant, I'm hardly going to need the power anyway. However, for serious microgeneration, at the current time the only halfway practical and affordable renewable energy source is wind, which is vastly cheaper - and when you need the power most, it also tends to be windy, so the energy availability actually matches domestic energy usage much better. Wind also has a much better energy payoff. The energy to make a typical wind turbine is generated by the turbine over a period of six months - it's more like 6 years for solar. Unless photo voltaic solar becomes vastly cheaper, it's simply a non-contender except for novelty value, even if you live in the desert.
But that's still not radiant cold. You can't have a radiant cooler. If radiant heating is being done then it's the surroundings heating the cooler parts - the warmer surroundings are doing the radiating, not the thing that's cold.
Additionally, before you flame also check your maths. EUR9000 per 2kW is still EUR 90,000 per 20kW - converted to AU$, that's still over $150,000 for 20kW - which I maintain is ruinously expensive for that much power.