Rend It
Nov 21, 06:24 PM
... sooo, a thermocouple (http://en.wikipedia.org/wiki/Thermocouple) on a chip? Thermocouples have horrendous efficiency. I don't see how a such a chip in an enclosed environment (like a laptop motherboard) can achieve enough of a thermal gradient to produce enough current to be useful.
I dunno, i'm skeptical.
Skeptical you should be, but these aren't really thermocouples. The same physical principle applies, but thermocouples are really only for temperature measurement. These are thermoelectric coolers. See here (http://en.wikipedia.org/wiki/Peltier-Seebeck_effect).
If you want to power the temperature change yourself, you need a high current. But if you want to generate electricity from them, then just connect them into a circuit with out any powersupply i.e. stick a fan's power terminals on that, stick one side of the TEC on a hot chip or cup of tea etc. to setup the delta T. (temp difference) then the fan will start spinning!
Dan :-)
While what you're saying is true in principle, I seriously doubt the practicality of what you're suggesting. TECs are moderately efficient at converting electricity into a temperature differential (or being used as a heat pump), but their efficiency in the other mode of operation (Seebeck effect) is very, very low (typ. < 5%). If you take a chip-sized (~ 1 cm^2) TEC, connect it between a hot processor core at 100 C and ambient temperature at 25 C, you will not have enough power to turn a computer fan at any modest speed. Furthermore, even if you could harvest that electricity and store it, the added energy would be less than 0.1% of a typical laptop battery. :rolleyes:
If you wanted to use a larger TEC module (say 16 cm^2) on top of the 80 C CPU case, then the added energy would be less than 1%.
Estimates based on info here (http://www.ferrotec.com/technology/thermoelectric/thermalRef13.php).
I dunno, i'm skeptical.
Skeptical you should be, but these aren't really thermocouples. The same physical principle applies, but thermocouples are really only for temperature measurement. These are thermoelectric coolers. See here (http://en.wikipedia.org/wiki/Peltier-Seebeck_effect).
If you want to power the temperature change yourself, you need a high current. But if you want to generate electricity from them, then just connect them into a circuit with out any powersupply i.e. stick a fan's power terminals on that, stick one side of the TEC on a hot chip or cup of tea etc. to setup the delta T. (temp difference) then the fan will start spinning!
Dan :-)
While what you're saying is true in principle, I seriously doubt the practicality of what you're suggesting. TECs are moderately efficient at converting electricity into a temperature differential (or being used as a heat pump), but their efficiency in the other mode of operation (Seebeck effect) is very, very low (typ. < 5%). If you take a chip-sized (~ 1 cm^2) TEC, connect it between a hot processor core at 100 C and ambient temperature at 25 C, you will not have enough power to turn a computer fan at any modest speed. Furthermore, even if you could harvest that electricity and store it, the added energy would be less than 0.1% of a typical laptop battery. :rolleyes:
If you wanted to use a larger TEC module (say 16 cm^2) on top of the 80 C CPU case, then the added energy would be less than 1%.
Estimates based on info here (http://www.ferrotec.com/technology/thermoelectric/thermalRef13.php).
aiongiant
Sep 20, 07:55 PM
Now that SATA is working in XP, has anyone tried Vista RC1?
i got vista going.. problem is the vid card isn't working properly
althought i have yet to try the new firmware update
i got vista going.. problem is the vid card isn't working properly
althought i have yet to try the new firmware update
Peace
Mar 26, 05:11 PM
It's one of those containers holding the bill. It's too black to be an iPad.
Gizmodo says the tipster said it was a menu.
Gizmodo says the tipster said it was a menu.
danielbriggs
Nov 21, 04:50 PM
This hits what I think is their main hurdle...how do you get these numbers down.
A nearly 100C difference and the amps alone make this really a problem for basic consumer devices..
Now on an industrial scale...
If you want to power the temperature change yourself, you need a high current. But if you want to generate electricity from them, then just connect them into a circuit with out any powersupply i.e. stick a fan's power terminals on that, stick one side of the TEC on a hot chip or cup of tea etc. to setup the delta T. (temp difference) then the fan will start spinning!
Dan :-)
A nearly 100C difference and the amps alone make this really a problem for basic consumer devices..
Now on an industrial scale...
If you want to power the temperature change yourself, you need a high current. But if you want to generate electricity from them, then just connect them into a circuit with out any powersupply i.e. stick a fan's power terminals on that, stick one side of the TEC on a hot chip or cup of tea etc. to setup the delta T. (temp difference) then the fan will start spinning!
Dan :-)
more...
theOtherGeoff
Mar 23, 04:15 PM
I figured this would be coming once I seen the Pioneer VSX-1021-K.
audio only. not much value on the video side of the house.
audio only. not much value on the video side of the house.
AxisOfBeagles
Mar 11, 07:50 PM
I like the idea you have going here. I would like the saturation more realistic, but that's just me. Different framing and cropping come to mind. Maybe play off the differences in the textures and color, putting them closer and cropping or framing in tight. I may play with this idea when I can. I have nice oranges, but I need an apple. And the nice lighting setup you have.
Please excuse the PhotoShop hack of your image...:)
Dale
Dale - no excusing required. You are one of a handful of folks here whose opinions I highly value and look forward to. To the suggestions you raise;
* Saturation. Acknowledged. to be fair to my concept tho, that was intentional. To achieve the greatest degree of obvious contrast in the photo I pushed the colors on the orange and the apple - but not overall in the photo.
* Composition (framing). This was the issue that concerned me the most. I played with different crops but elected to go with a very symmetrical and obvious crop - with the idea in mind that this best reinforced the obvious contrast elements (apples-oranges and black-white). But I never even thought of or attempted a close crop such as you used here, and now I'm gonna go play with that. I rather like it and it still seems to carry the conceptual message of contrast.
As always - thanks much for the great feedback.
Please excuse the PhotoShop hack of your image...:)
Dale
Dale - no excusing required. You are one of a handful of folks here whose opinions I highly value and look forward to. To the suggestions you raise;
* Saturation. Acknowledged. to be fair to my concept tho, that was intentional. To achieve the greatest degree of obvious contrast in the photo I pushed the colors on the orange and the apple - but not overall in the photo.
* Composition (framing). This was the issue that concerned me the most. I played with different crops but elected to go with a very symmetrical and obvious crop - with the idea in mind that this best reinforced the obvious contrast elements (apples-oranges and black-white). But I never even thought of or attempted a close crop such as you used here, and now I'm gonna go play with that. I rather like it and it still seems to carry the conceptual message of contrast.
As always - thanks much for the great feedback.
more...
gopher
Sep 14, 06:33 PM
Who says all the processing can't be finished in the processor before it goes out on the bus. If your software is optimized it will stay on the processor do its Altivec, do its L3 cache stuff, and then when it is ready to issue a result it will go out on the bus. But unfortunately most developers seem to be ignorant they can do that, and instead over utilize the bus slowing things down. The folks at Genentech managed a 5 fold speed boost by avoiding the slowdown on the bus. Remember with less stages it will take less processor time to finish tasks. So there are ways of optimizing software for the G4 that not every software developer has taken advantage of. And believe me my G4 iMac 800 Mhz is mighty fast even without all that L3 cache, and a 100 Mhz bus. I have yet to see a PC that can match it. Get Jaguar and be surprised by how fast a Mac is.
HBOC
Mar 19, 06:27 PM
I agree with most of what you say, except.... I don't get the "Shoot only Full Manual" advice that is heard here and in other places.
If I have spent some $$ on a camera with a computer and a light meter, I figure I'm going to make it do at some of the work. The way I see it, I have a management job, and that is to decide what DoF and/or apparent motion I want to capture (composition) - and to ensure good exposure (quality control). The camera gets to do the grunt work of doing the calculations. It's the back-office.
Generally I use Aperture Priority, and let the camera worry itself over the shutter speed. Though, being the suspicious boss type, I'm always checking over the Camera's work and watching the settings. That way I can step in and make changes if necessary.
I figure I'm thinking through the cycle anyway. I like DoF control, so I generally start with Av. I observe the shutter speed - make sure I'm fast enough if I'm handholding, or perhaps I want to freeze or blur something. (Or if I'm on a tripod can I get away with triggering with a light finger or do I need to go to a timer or cable release).
Then I observe the overall exposure. Do I need to adjust the +/- thingy?
I guess it's the difference between :
Think -> Look -> Think -> Make a Setting -> Push Button (Manual)
Think -> Look -> Adjust if necessary -> Push Button (Av or Tv).
Seems faster my way, and just as accurate. And maybe more accurate if I'm tired. ... but maybe I'm missing something?
I'm really enjoying this whole thread..... :)
Well shooting manual works for what I do. I doubt any sports photographers use anything other than Aperture Priority mode I would think.
If I have spent some $$ on a camera with a computer and a light meter, I figure I'm going to make it do at some of the work. The way I see it, I have a management job, and that is to decide what DoF and/or apparent motion I want to capture (composition) - and to ensure good exposure (quality control). The camera gets to do the grunt work of doing the calculations. It's the back-office.
Generally I use Aperture Priority, and let the camera worry itself over the shutter speed. Though, being the suspicious boss type, I'm always checking over the Camera's work and watching the settings. That way I can step in and make changes if necessary.
I figure I'm thinking through the cycle anyway. I like DoF control, so I generally start with Av. I observe the shutter speed - make sure I'm fast enough if I'm handholding, or perhaps I want to freeze or blur something. (Or if I'm on a tripod can I get away with triggering with a light finger or do I need to go to a timer or cable release).
Then I observe the overall exposure. Do I need to adjust the +/- thingy?
I guess it's the difference between :
Think -> Look -> Think -> Make a Setting -> Push Button (Manual)
Think -> Look -> Adjust if necessary -> Push Button (Av or Tv).
Seems faster my way, and just as accurate. And maybe more accurate if I'm tired. ... but maybe I'm missing something?
I'm really enjoying this whole thread..... :)
Well shooting manual works for what I do. I doubt any sports photographers use anything other than Aperture Priority mode I would think.
more...
Westacular
Mar 23, 05:34 PM
Why don't they just use existing standards? RTSP, H.264/MPEG4 video and bonjour. There. No licensing required.
But no.
Apple pulls the "standards compliant" flag out of their asses only when it suits them. Boo.
Umm. You almost did just describe AirPlay. It *is* based on Bonjour and H.264/MPEG4 video.
For control and transport they didn't go with RTSP+RTP -- which has limitations around firewalls, proxies, CDNs, and more importantly, encryption/DRM -- and instead used HTTP Live Streaming (http://en.wikipedia.org/wiki/HTTP_Live_Streaming), which Apple openly submitted to the IETF a couple years ago, and has been undergoing standardization since.
And that's most of what there is to it. The only novel stuff is in the way Bonjour is used for this, and that was easily reverse engineered, which is how you now have software like AirPlayer (for OS X) and AirViewer (for iOS) which act as Apple TV-like AirPlay displays.
... But only for DRM-free videos. Anything that's wrapped in Fairplay (iTunes' DRM) can, as always, only be played back by official Apple-sanctioned software/devices.
But no.
Apple pulls the "standards compliant" flag out of their asses only when it suits them. Boo.
Umm. You almost did just describe AirPlay. It *is* based on Bonjour and H.264/MPEG4 video.
For control and transport they didn't go with RTSP+RTP -- which has limitations around firewalls, proxies, CDNs, and more importantly, encryption/DRM -- and instead used HTTP Live Streaming (http://en.wikipedia.org/wiki/HTTP_Live_Streaming), which Apple openly submitted to the IETF a couple years ago, and has been undergoing standardization since.
And that's most of what there is to it. The only novel stuff is in the way Bonjour is used for this, and that was easily reverse engineered, which is how you now have software like AirPlayer (for OS X) and AirViewer (for iOS) which act as Apple TV-like AirPlay displays.
... But only for DRM-free videos. Anything that's wrapped in Fairplay (iTunes' DRM) can, as always, only be played back by official Apple-sanctioned software/devices.
Peace
Sep 1, 08:54 AM
Don't kid yourself about this "super secret" stuff.Leopard needs some hard work and Apple doesn't care who has it as long as bugs are sent in.Remember the Developer kits?.I had one.The Intel O/S X wasn't supposed to be on any system other than those.
Here comes OSX86Project.org and a couple others OPENLY flaunting installing it on PeeCees.Giving instructions and everything.Apple did nothing about that.They won't do anything about the folks that have it now other than their own employees which gives them bad PR.
Here comes OSX86Project.org and a couple others OPENLY flaunting installing it on PeeCees.Giving instructions and everything.Apple did nothing about that.They won't do anything about the folks that have it now other than their own employees which gives them bad PR.
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~Shard~
Dec 6, 01:53 PM
Macs have the intelligence built in to auto-connect independent of the cable type. It doesn't matter what kind of cable you use, your Mac sorts it out internally. Cool, huh? :cool:
SuperCachetes
Mar 27, 10:08 AM
How about no driving tax. How about we tax people appropriately and get rid of crap like business tax incentives and farm subsidies since they're only ever abused by people that 'play the game'.
Why should we be screwing over regular people so much.
I agree with the first half of your post, but the "regular people" need to stop trying to blame the government for their problems. If they have a crappy life or can't afford something they think they need, it probably isn't because they are overtaxed.
Why should we be screwing over regular people so much.
I agree with the first half of your post, but the "regular people" need to stop trying to blame the government for their problems. If they have a crappy life or can't afford something they think they need, it probably isn't because they are overtaxed.
more...
kaielement
May 5, 07:30 PM
Really this is stupid. Think about it buying a mac is like buying a high end sports car and buying a windows machine is like buying a low end junk car. Now don't get me wrong they both get you from point a to point be but let's face it it's funner and sexier to drive the sports car. NO I know fixing the sports car may be more prier but lest face it you really won't need to fix it very often and in most cases you might get comped on the repairs. Now the low end car over time will need to get fixed and I know it may be cheaper but all the little stuff adds up. I am just saying.
ddtlm
Oct 2, 08:53 PM
Not Microsoft's market... yet.
They want that peice of the pie. Give them time, they will try to take it.
They want that peice of the pie. Give them time, they will try to take it.
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twoodcc
Oct 10, 09:04 AM
ehh.. you know wikipedia isn't always right, right?
no one is
no one is
Digidesign
Sep 19, 04:31 PM
You can't boot XP from CD on a Mac. You can't you can't you can't.
Yes you can.
I installed XP on a new HDD with only one large partition (NTFS) without the 200mb EFI partition from OS X. I didn't use Bootcamp at all.
So far, everything's working fine and I can boot between OS X and XP with no problems.
Yes you can.
I installed XP on a new HDD with only one large partition (NTFS) without the 200mb EFI partition from OS X. I didn't use Bootcamp at all.
So far, everything's working fine and I can boot between OS X and XP with no problems.
more...
powerofmac
Aug 19, 10:13 AM
After numerous accusations from all over the world of Facebook violating private privacy rights they now do this...
Yep, I really thing that Facebook is going to go down with all this crap they are doing.
Microsoft's rep = crashing and copying Mac
Facebook's rep = lack of privacy and opt out NOT opt in
Yep, I really thing that Facebook is going to go down with all this crap they are doing.
Microsoft's rep = crashing and copying Mac
Facebook's rep = lack of privacy and opt out NOT opt in
JackAxe
Apr 5, 02:56 PM
Somehow I was expecting to see a lot more praise and excitement for the 3DS after it launched....
The 3D effect seems to trigger mixed reactions. Other than that...there really doesn't seem to be anything truly exciting about it? I don't see any "wow, those graphics!!" or "holy cow, this thing is fast/powerful" type comments.
The general vibe I am getting from here and other places is more like "pretty neat", rather than "wow, so awesome". :confused:
I bought my 3DS for Zelda, so as it's not out yet. It's just what it is.
The original DS wasn't exactly a WOW factor at launch and for many -- especially the press -- it was considered a complete joke as they praised the PSP. Its launch line up was worse than the 3DS, but years later its games and sales speak for itself.
Anyways, the 3DS just needs titles. It's a solid portable gaming system with no shortage of GREAT DS games to play on it until 3DS titles start to role in.
The 3D effect seems to trigger mixed reactions. Other than that...there really doesn't seem to be anything truly exciting about it? I don't see any "wow, those graphics!!" or "holy cow, this thing is fast/powerful" type comments.
The general vibe I am getting from here and other places is more like "pretty neat", rather than "wow, so awesome". :confused:
I bought my 3DS for Zelda, so as it's not out yet. It's just what it is.
The original DS wasn't exactly a WOW factor at launch and for many -- especially the press -- it was considered a complete joke as they praised the PSP. Its launch line up was worse than the 3DS, but years later its games and sales speak for itself.
Anyways, the 3DS just needs titles. It's a solid portable gaming system with no shortage of GREAT DS games to play on it until 3DS titles start to role in.
InfoSecmgr
Apr 6, 03:38 PM
That has nothing to do with the hundreds of billions we dump on weapons that don't even get used.
It has everything to do with it. You simply have no concept of what goes on in the military unless you are in or work for them. You really think what you hear in the news is the way it is? Wow.
It has everything to do with it. You simply have no concept of what goes on in the military unless you are in or work for them. You really think what you hear in the news is the way it is? Wow.
gauchogolfer
Sep 25, 10:02 AM
Google translator is your friend:
German site in funny English (http://translate.google.com/translate?u=http%3A%2F%2Fwww.mactechnews.de%2Findex.php%3Fid%3D14542&langpair=de%7Cen&hl=en&ie=UTF-8&oe=UTF-8&prev=%2Flanguage_tools).
German site in funny English (http://translate.google.com/translate?u=http%3A%2F%2Fwww.mactechnews.de%2Findex.php%3Fid%3D14542&langpair=de%7Cen&hl=en&ie=UTF-8&oe=UTF-8&prev=%2Flanguage_tools).
MacRumorUser
Apr 21, 06:33 AM
Did you use the 3ds flashcart to play DS titles ?
No, just standard DSi cartridges.
No, just standard DSi cartridges.
danielsmu
Mar 16, 08:28 AM
Anybody seen any of the DFW apple stores receive and begin selling iPads during the day or have they been holding them for sale at the beginning of the next day? Trying to see if it's worth going to Northpark or Knox bright and early on Saturday morning or if it's best to just keep calling around throughout the day...
iDutchman
Mar 17, 12:01 PM
The gas price (EURO95) as of today (Netherlands):
€1,675/Liter <--> €6,35/US Gallon
€6,35=$8,90/US Gallon.
So.. It's always been expensive but this is bad.
----
The picture that is shown tells you how much cheaper (in %) the other countries are (compared to The Netherlands).
--- goedkoper=cheaper --- Verenigd Koninkrijk= UK --- Griekenland=Greece --- Oostenrijk=Austria
€1,675/Liter <--> €6,35/US Gallon
€6,35=$8,90/US Gallon.
So.. It's always been expensive but this is bad.
----
The picture that is shown tells you how much cheaper (in %) the other countries are (compared to The Netherlands).
--- goedkoper=cheaper --- Verenigd Koninkrijk= UK --- Griekenland=Greece --- Oostenrijk=Austria
liavman
Mar 25, 08:28 PM
Federal Agency Will Review a Kodak Patent Claim.
A federal agency has decided to review Eastman Kodak�s patent claim against Apple and Research In Motion. The International Trade Commission said Friday it would look at a judge�s finding in January that Apple�s iPhone and RIM�s BlackBerry do not violate a 2001 Kodak image-preview patent. The favorable decision revives Kodak�s hopes of negotiating royalties worth $1 billion or more. The agency�s six commissioners will decide by May 23 whether to alter the initial determination by its chief administrative judge or let it stand.
http://www.nytimes.com/2011/03/26/business/26bizbriefs-FEDERALAGENC_BRF.html?partner=yahoofinance
A federal agency has decided to review Eastman Kodak�s patent claim against Apple and Research In Motion. The International Trade Commission said Friday it would look at a judge�s finding in January that Apple�s iPhone and RIM�s BlackBerry do not violate a 2001 Kodak image-preview patent. The favorable decision revives Kodak�s hopes of negotiating royalties worth $1 billion or more. The agency�s six commissioners will decide by May 23 whether to alter the initial determination by its chief administrative judge or let it stand.
http://www.nytimes.com/2011/03/26/business/26bizbriefs-FEDERALAGENC_BRF.html?partner=yahoofinance