Second attempt:)
Heat is not a problem. Yes the stage gets hot. The trick is to leave an air gap between the stage and the LCD with a case fan (or multiple if you're really worried), and enough air flows to keep the LCD a little warm to the touch.
If you're doing an overhead hack like this, most of your heat problem is already solved, because the projector case isolates most of the heat anyway.
The most inconvenient part of this type of build is that you're stuck using the halogen projector bulbs. For power/cool/light quality, you can do this identical build, except bolt in your own 250W double-ended (HQI) metal halide light (and ballast!). It is cooler, but (probably) generates UV that you need to filter out.
Cooling is a serious concern for building a projector. However, it's more complicated than just making it as cold as possible. Light sources have expected operation temperatures, which if you deviate from, cause terrible effects such as shorter life, or poor color reproduction. For example, halogen lights from overhead projectors are EXPECTED to operate at high temperatures, so if you look at the projector case fan, it's actually a semi-slow fan not moving much air. You could even crack the bulb if you introduce a large enough temperature difference (such as a direct fan on your bulb).
Surprisingly, it's not too hard to cool your LCD though, a single case fan is more than enough for my projector, as long as a space remains between the stage and the LCD. Temperature never rises much.
Lastly, if you're one of the "it's not DIY" folk - the project isn't for you. If you're one of the "I can buy it" folk, then you don't care about color reproduction, 1080p, or tinkering as much as we do.
The filing does have some interesting parts to it. My favorite section was titled "Operational Vernacular", where they say they will sack "anyone who ever dares to use the slogan 'We love to spy and it shows'."
One of the more interesting insights is that the coroprations don't want to publish the exact specifications of their HDTV systems because it might impact their Plasma screen sales if customers found out they only get 1/2 of HDTV on their brand new $9,000 screen.
Detection capabilities are measured in millions of samples nowdays. Moreover, why go through the hassle of growing up an organism, when just a piece of the organism will do? It's much harder to keep a colony of bacteria alive than the small protein/antibody fragments currently used as protein assays.
If we were to grow up enough of these cells to use in that many detection reactions, it would cost too much, take up too much space, and be too slow to be applied a high throughput system.
As for being "programmed", is it really news that cells behave based on their DNA and protein content? Too much PR spin on something not practical.
This may be what the professor was talking about in Back To The Future.
I might finally know what a jiggawatt is!
Different School of Thought Plug...
on
Emergence
·
· Score: 1
The terms "connectionism" and "emergence" are used in the field of cognitive science to represent a particular school of thought (generally accepted as Rumelhart and McClelland's territory, which Wolfram is known to align with). This school feels that simple elements, when combined into "sufficiently large and complex" systems begin exhibiting behavior that the elements alone cannot explain.
I think there are great chasms of logic in this.
I highly suggest also reading a Steven Pinker book such as The Blank Slate (which has goes into many aspects of this debate) before getting too deep into emergence. Then at least you will be aware of other views.
The big idea Pinker aligns himself with (as I do) is that there is structure to be understood in the organization of the smaller elements, and this structure is perhaps as important as the elements themselves. Though describing these structures, we will gain understanding of the overall behavior, and not get stuck treating it like a magic black-box.
[Apologies to all the people I mentioned if I've summarized their complicated views in an overly simplistic manner]
select nerds from slashdot_comments where takes_a_joke='way too seriously' * ERROR at line 1: ORA-00942: table or view does not exist
(The asterisk lies under the string "slashdot_comments", but slashdot isn't printing out my whitespace)
I consulted slashcode and it was obvious that the table "slashdot_comments" did not exist. Finally, I couldn't find the field "nerds" in any table defined, so I don't think this statement does what you want it to.
It's not uncommon for there to be secret/unknown laws and rules that some people must abide by - if they're workers with security clearances. However, it's absurd to make secret laws the norm and take proceedings that should be part of the public domain (ie most parts of terrorism trials) behind closed doors. When everyone has to abide by a rule at pain of prosecution, then it quickly becomes trivial to figure out what the rule is.
The default manner to develop and issue policy should never be behind the veil of secrecy.
I was reading slashdot, and he left a message for me.
Give me all your money - I know who you are.
ps. I accept paypal
So I clicked away as fast as I could and started reading fark - but he was one step ahead.
If you don't give me all your money I'll disable your SETI@home account!
I was terrified. This guy was good. So I thought I'd try something else, I went to google news - how was he doing this? There in the headlines:
iraqWarDeathToll++;
Stem Cells blocked by extremists citing Satan - Christopher Reeve unavailable for comment.
I Said Send Me Your Money.
jobsAvailable--;
I'd had enough, I turned off my computer and ran to a newspaper.
95% of the money in the world controlled by 5% of the population, 50% controlled by 1%.
Economic middle-class taxes and expenses rising - wages stagnant.
Super-rich get tax break on overseas investements.
Incumbent campaigns to convince citizens that they will be rich - fights for lower taxes.
And I realized there wasn't anyone stalking me. The messages weren't directed at me alone, but at me as a member of the economic middle-class. I thought I was a bully's target, and I guess in a way I am. I'm personally affected by every corrupt policy, every writ of habeas corpus, every war, every genocide.
Slashdot Mirror
I can finally get past the second step - I'll have an ANY KEY!
Second attempt :)
Heat is not a problem. Yes the stage gets hot. The trick is to leave an air gap between the stage and the LCD with a case fan (or multiple if you're really worried), and enough air flows to keep the LCD a little warm to the touch.
If you're doing an overhead hack like this, most of your heat problem is already solved, because the projector case isolates most of the heat anyway.
The most inconvenient part of this type of build is that you're stuck using the halogen projector bulbs. For power/cool/light quality, you can do this identical build, except bolt in your own 250W double-ended (HQI) metal halide light (and ballast!). It is cooler, but (probably) generates UV that you need to filter out.
I'll try to field this one.
Cooling is a serious concern for building a projector. However, it's more complicated than just making it as cold as possible. Light sources have expected operation temperatures, which if you deviate from, cause terrible effects such as shorter life, or poor color reproduction. For example, halogen lights from overhead projectors are EXPECTED to operate at high temperatures, so if you look at the projector case fan, it's actually a semi-slow fan not moving much air. You could even crack the bulb if you introduce a large enough temperature difference (such as a direct fan on your bulb).
Surprisingly, it's not too hard to cool your LCD though, a single case fan is more than enough for my projector, as long as a space remains between the stage and the LCD. Temperature never rises much.
Lastly, if you're one of the "it's not DIY" folk - the project isn't for you. If you're one of the "I can buy it" folk, then you don't care about color reproduction, 1080p, or tinkering as much as we do.
www.diyaudio.com (The Moving Image section)n y.com
www.lumenlab.com
www.diyprojectorcompa
And if you find yourself getting into DIY try
www.hackaday.com - at least one hack a week will be cool.
The filing does have some interesting parts to it. My favorite section was titled "Operational Vernacular", where they say they will sack
"anyone who ever dares to use the slogan 'We love to spy and it shows'."
A freind of a friend put this together last year - it only gives you the sites google thinks are unsafe.
http://www.monzy.org/unsafesearch/
This should be required reading for anyone about to buy a TV.
http://answers.google.com/answers/threadview?id=47 089
One of the more interesting insights is that the coroprations don't want to publish the exact specifications of their HDTV systems because it might impact their Plasma screen sales if customers found out they only get 1/2 of HDTV on their brand new $9,000 screen.
Detection capabilities are measured in millions of samples nowdays. Moreover, why go through the hassle of growing up an organism, when just a piece of the organism will do? It's much harder to keep a colony of bacteria alive than the small protein/antibody fragments currently used as protein assays.
If we were to grow up enough of these cells to use in that many detection reactions, it would cost too much, take up too much space, and be too slow to be applied a high throughput system.
As for being "programmed", is it really news that cells behave based on their DNA and protein content? Too much PR spin on something not practical.
Anyone else ever type in /.'s URL instead of using it as home or a bookmark?
Ever type "slasdhdot.org"? Made me laugh.
Anyway...
I'm not too afraid of the asteroid, Bruce Willis and his raw-around-the-edges friends have handled much larger.
These guys have even done the demonstration for you:
http://driveslag.eecue.com
This may be what the professor was talking about in Back To The Future.
I might finally know what a jiggawatt is!
I think there are great chasms of logic in this.
I highly suggest also reading a Steven Pinker book such as The Blank Slate (which has goes into many aspects of this debate) before getting too deep into emergence. Then at least you will be aware of other views.
The big idea Pinker aligns himself with (as I do) is that there is structure to be understood in the organization of the smaller elements, and this structure is perhaps as important as the elements themselves. Though describing these structures, we will gain understanding of the overall behavior, and not get stuck treating it like a magic black-box.
[Apologies to all the people I mentioned if I've summarized their complicated views in an overly simplistic manner]
I consulted slashcode and it was obvious that the table "slashdot_comments" did not exist. Finally, I couldn't find the field "nerds" in any table defined, so I don't think this statement does what you want it to.
It's not uncommon for there to be secret/unknown laws and rules that some people must abide by - if they're workers with security clearances. However, it's absurd to make secret laws the norm and take proceedings that should be part of the public domain (ie most parts of terrorism trials) behind closed doors. When everyone has to abide by a rule at pain of prosecution, then it quickly becomes trivial to figure out what the rule is.
The default manner to develop and issue policy should never be behind the veil of secrecy.
I was reading slashdot, and he left a message for me.
Give me all your money - I know who you are. ps. I accept paypal
So I clicked away as fast as I could and started reading fark - but he was one step ahead.
If you don't give me all your money I'll disable your SETI@home account!
I was terrified. This guy was good. So I thought I'd try something else, I went to google news - how was he doing this? There in the headlines:
iraqWarDeathToll++;
Stem Cells blocked by extremists citing Satan - Christopher Reeve unavailable for comment.
I Said Send Me Your Money.
jobsAvailable--;
I'd had enough, I turned off my computer and ran to a newspaper.
95% of the money in the world controlled by 5% of the population, 50% controlled by 1%.
Economic middle-class taxes and expenses rising - wages stagnant.
Super-rich get tax break on overseas investements.
Incumbent campaigns to convince citizens that they will be rich - fights for lower taxes.
And I realized there wasn't anyone stalking me. The messages weren't directed at me alone, but at me as a member of the economic middle-class. I thought I was a bully's target, and I guess in a way I am. I'm personally affected by every corrupt policy, every writ of habeas corpus, every war, every genocide.
VOTE, if you care.