The wings were driven by electrical powered motors controlled via Wii remotes. Movement of the guys arms made the wings move the same way. So not human powered at all.
No it isn't fiddling with numbers. You are missing the heat pump bit.
The device is taking X amount of energy from the electricity supply and X * 1.3 of energy as thermal and converting this to X * 2.3 as light. i.e. it is 230% efficient when comparing light output to electrical input. Equally, it is 100% efficient when comparing light output to electrical and heat energy input combined.
This does take a little bit of thinking to get your head around but I have a more common example in the shed outside. It contains a heat pump which is 350% efficient. It takes 2kW from the electricity supply and outputs 7kW of heat energy to heat my house. The missing 5kW comes from the pipes in the garden as heat energy. The result being that the garden is slowly being cooled. http://en.wikipedia.org/wiki/Heat_pump
I have no idea what this means. How is this possible?
I guess because you didn't study properly at school...;-)
"Without them you would effectively tie the RX and TX signals together and probably turn the entire network into an aerial for Radio 2 reception."
I disagree with the first part of this. Ethernet works off differential signals and the transformer does a good job of removing the common mode signals (non differential) coming down the wire. Without the magnetics the common mode signals (such as DC, mains interference, Radio 2 transmissions) picked up by a potentially long ethernet lead will turn up at the input to the ethernet phy (receiver) chip. This may or may not be enough to stop it from working depending on the interference received. The lack of correct voltage biasing (also done via the magnetics) will very likely stop it from working though. Even so the RX and TX won't be shorted.
Studies have repeatedly shown that prayer helps in hospital situations. Why? Maybe people just feel comforted or a sense that somebody cares about them and wants them to make it. What's the scientific explanation? I haven't seen a good one. But more people recover and have less complications.
Show me a double blind experiment which shows prayers work? Properly conducted double blind experiments has shown that prayer does not work. The experiments which do show a result, the patient knows that they are being prayed for and/or are doing the praying themselves. Sure it may help these people but this is due to the ritual causing the person to self heal. No super power is involved at all.
44pin Quad Flat Pack are trivial to remove and replace with the right tools - which basically means a hot air gun with the small nozzle. A couple of weeks ago I removed and replaced two 144 pin quad flat pack devices with 0.6mm pitch legs in about 10 mins. It isn't something I want to do for production boards but it is fine for the development boards I was using.
Screen printing solder using solder masks + ovens are easily within the hobbiest market now. You can get a custom PCB + solder stencil made for £40 (100mm^2) and I use a £50 oven to melt the solder. Gives good results too (though I still do the sub 1mm pitch pins by hand as I get too many shorts otherwise).
I've not attempted BGAs as I could see that the success rate might not be too high.
To the casual reader, it looks like Timbo is replying to this post:
Yes, how dare you philistines mock the $1,095 HDMI cable? The zeros and ones are so much sharper and clearer than the zeros and ones transmitted over cheap cable.
My understanding of this is the clever part is the very short pulsed laser combined with a very short exposure camera. Each laser pulse send lots of photons together in a bunch across the field of view of the camera. Some clever camera synchronisation allows each "frame" taken by the camera to be slightly (pico seconds) later than the previous one. When run as a movie, this appears to show a light pulse as moves across the field of view.
However, it doesn't take a picture of a single photon - it takes pictures of a bunch of photons and neither does it take a movie of the same bunch of photons moving across the field of view - each frame is taken of a different laser pulse.
(for simplicity I've ignored the fact that the camera is a line scan camera rather than full frame camera)
It isn't called "football" (that is a different game, where the foot is used most of the time to move the ball), it is called "american football". The first word of this should explain everything...
Wall following only works if there is only one possible route to the centre without back tracking. With more than one route (as per these mazes), wall following will cause you to go around in circles and will never solve.
I'm with you on this. It looks to me that someone took time and care over it to keep the tracking to a minimum but not anything special. I have a draw full of PCBs which are similar and I don't claim to be particularly good at PCB design.
At the moment, the energy absorbed by the antenna isn't going anywhere as nobody has invented a suitable diode. It therefore will just end up as heat anyway. This isn't actually gaining you anything as a black sheet of paper will do this job equally as well.
So what do people think of Lastpass and the like? It gives a single point of failure and you have to trust them (which I do for everything apart from my bank stuff). It does allow you to use impossible to guess (nor remember!) passwords though with a different one for each account.
Slashdot Mirror
Bad Astronomer has done a good hatchet job on this story:
http://www.slate.com/blogs/bad_astronomy/2013/03/11/meteorite_life_claims_of_fossils_in_a_meteorite_are_still_wrong.html
The fact that it can't run Quake ...
Then again... http://www.raspberrypi.org/archives/1139
The wings were driven by electrical powered motors controlled via Wii remotes. Movement of the guys arms made the wings move the same way. So not human powered at all.
(Ok, ok, CGI electric motors)
Tell that to the 350% efficient (measured) heat pump I have in the shed....
No it isn't fiddling with numbers. You are missing the heat pump bit.
The device is taking X amount of energy from the electricity supply and X * 1.3 of energy as thermal and converting this to X * 2.3 as light. i.e. it is 230% efficient when comparing light output to electrical input. Equally, it is 100% efficient when comparing light output to electrical and heat energy input combined.
This does take a little bit of thinking to get your head around but I have a more common example in the shed outside. It contains a heat pump which is 350% efficient. It takes 2kW from the electricity supply and outputs 7kW of heat energy to heat my house. The missing 5kW comes from the pipes in the garden as heat energy. The result being that the garden is slowly being cooled. http://en.wikipedia.org/wiki/Heat_pump
I have no idea what this means. How is this possible?
I guess because you didn't study properly at school... ;-)
"Without them you would effectively tie the RX and TX signals together and probably turn the entire network into an aerial for Radio 2 reception."
I disagree with the first part of this. Ethernet works off differential signals and the transformer does a good job of removing the common mode signals (non differential) coming down the wire. Without the magnetics the common mode signals (such as DC, mains interference, Radio 2 transmissions) picked up by a potentially long ethernet lead will turn up at the input to the ethernet phy (receiver) chip. This may or may not be enough to stop it from working depending on the interference received. The lack of correct voltage biasing (also done via the magnetics) will very likely stop it from working though. Even so the RX and TX won't be shorted.
Studies have repeatedly shown that prayer helps in hospital situations. Why? Maybe people just feel comforted or a sense that somebody cares about them and wants them to make it. What's the scientific explanation? I haven't seen a good one. But more people recover and have less complications.
Show me a double blind experiment which shows prayers work? Properly conducted double blind experiments has shown that prayer does not work. The experiments which do show a result, the patient knows that they are being prayed for and/or are doing the praying themselves. Sure it may help these people but this is due to the ritual causing the person to self heal. No super power is involved at all.
If you disagree and think prayer does work in the double blind, go and speak to http://www.randi.org/site/index.php/1m-challenge.html and he will give you $1million when you succeed.
I wish I had mod points for this and your other posts. Well put.
44pin Quad Flat Pack are trivial to remove and replace with the right tools - which basically means a hot air gun with the small nozzle. A couple of weeks ago I removed and replaced two 144 pin quad flat pack devices with 0.6mm pitch legs in about 10 mins. It isn't something I want to do for production boards but it is fine for the development boards I was using.
Screen printing solder using solder masks + ovens are easily within the hobbiest market now. You can get a custom PCB + solder stencil made for £40 (100mm^2) and I use a £50 oven to melt the solder. Gives good results too (though I still do the sub 1mm pitch pins by hand as I get too many shorts otherwise).
I've not attempted BGAs as I could see that the success rate might not be too high.
Look carefully and the vapour trails go through the walls.
To the casual reader, it looks like Timbo is replying to this post:
Yes, how dare you philistines mock the $1,095 HDMI cable? The zeros and ones are so much sharper and clearer than the zeros and ones transmitted over cheap cable.
This is why we quote excessively.
no, we don't
How do you quote?
A succinct answer and basically correct.
My understanding of this is the clever part is the very short pulsed laser combined with a very short exposure camera. Each laser pulse send lots of photons together in a bunch across the field of view of the camera. Some clever camera synchronisation allows each "frame" taken by the camera to be slightly (pico seconds) later than the previous one. When run as a movie, this appears to show a light pulse as moves across the field of view.
However, it doesn't take a picture of a single photon - it takes pictures of a bunch of photons and neither does it take a movie of the same bunch of photons moving across the field of view - each frame is taken of a different laser pulse.
(for simplicity I've ignored the fact that the camera is a line scan camera rather than full frame camera)
It isn't called "football" (that is a different game, where the foot is used most of the time to move the ball), it is called "american football". The first word of this should explain everything...
It is a standard Micromouse maze which has been around since the late 1970s (what do you mean you haven't heard of it?). 16 x 16 grid 180mm square.
Err. No.
Wall following only works if there is only one possible route to the centre without back tracking. With more than one route (as per these mazes), wall following will cause you to go around in circles and will never solve.
I'm with you on this. It looks to me that someone took time and care over it to keep the tracking to a minimum but not anything special. I have a draw full of PCBs which are similar and I don't claim to be particularly good at PCB design.
http://news.bbc.co.uk/1/hi/8678979.stm
Well that already exists...
http://en.wikipedia.org/wiki/Sapphire
At the moment, the energy absorbed by the antenna isn't going anywhere as nobody has invented a suitable diode. It therefore will just end up as heat anyway.
This isn't actually gaining you anything as a black sheet of paper will do this job equally as well.
OK, Cough up. Which one do you use?
I use LastPass which seems to do the job for me though I'm always a bit scared that there may be some security issue with it.
I went to see "Paul" last night - the latest Simon Pegg movie. I loved it.
http://www.youtube.com/watch?v=XPBPAGo-Qn8
I say let's put filtering ! Now the game will be to put porn on governmental websites, report them, and see what happens.
Or Jamie Olivers website... http://www.theregister.co.uk/2010/12/20/jamie_oilver_hiccup/
The offending image has now been removed but it was there yesterday.
http://bit.ly/fU1LY6 (links to a PDF)
It went out on the 16th.
Yeah, I love it too but I'm still suspicious of it. What are the possible holes?
So what do people think of Lastpass and the like? It gives a single point of failure and you have to trust them (which I do for everything apart from my bank stuff). It does allow you to use impossible to guess (nor remember!) passwords though with a different one for each account.