There was an article the other day posted on this. It operates at 24 and 60 ghz whereas most RFID is in the UHF (900 MHz band). This radio harvests energy to run an oscillator and actively transmits data whereas RFID…
Maybe you can describe this a bit more. The Great Seal Bug was used for wireless audio recording in the 40's, but this operated by using a microphone/cavity to modulate the load of an antenna; thereby embedding audio in…
Its far-field, so it couples completely differently than NFC tags. Also, NFC communicates by reflecting signals, this device communications by active transmission (according to the article, I haven't read their paper…
I do see your point but still, a newborn cannot support their head by themselves. Having the muscle ability to be able to hold ones head up is a fairly good prerequisite for being able to walk.
>I'm hoping for precise indoor navigation, Google and Apple are currently working on that. All you'd have to do is walk around with your phone, measuring signal strength and then visualize that. I'd wager there are _a…
Maybe I'm reading the article wrong, but it seems they are only describing a way to record EMG signals --- and not a way to `control' anything. I've previously worked in neural/EMG recording of flying insects and a…
While I agree with you, its worth noting that newborns do exhibit a walking reflex (that usually disappears after a few weeks). I would not completely rule out the possibility of a newborn walking with an exoskeleton --…
What then is the research barrier they need to cross? I'm genuinely curious. This seems more "researchy" than a lot of other items I've read (such as optimizing a planar antenna geometry with included matching network…
To be fair, any animals that use body language (i.e. dogs wagging tails) or sight are communicating electromagnetically (reflected light) in the same we humans communicate electromagnetically. We're not generating our…
>The most irritating thing was the keyboard which could not be mapped in the "standard" PC way (i.e. Ctrl Super Alt in the bottom left). That's funny. After using a mac for several years, that's my biggest gripe about…
This is actually one of the biggest reasons I am still in Mac OS. Are there any *nix builds or distributions that have this separation out of the box? I.e.: C-b, C-a, etc (emacs commands) including C-v for scroll (and…
From what I've seen of their demos (going off memory), they focus on power transfer to a single device. Their efficiency drops to near 0% when multiple devices are being powered. I have a hard time getting excited about…
Clicking "how does it work" and scrolling down has a link to a paper published in ubicomp 2010 detailing the CMOS chip and modulation. They seem pretty open about the technology to me.
Is soul the imprecision of notes not being perfectly uniform in duration and velocity? That's what your above comment seems to imply. For instance: Consider a recording from a piano played by a human and a…
I agree with your sentiment, but sadly science (or rather, the doing of science) is about prestige. Put yourself in the shoes of a funding agency. If you have two grant proposals, one from somebody at an institution in…
I can't find details of his hack, but I am curious if his detector detects actual read events (when his device responds with its ID) or if it is just an RF power detector. Is there a link to a technical description?
From my reading of the rules, you are limited to broadcasting +36 dBm EIRP (30 dBm [1W] into a 6 dBi antenna -> 4W EIRP). This can be a single frequency. In the 900 MHz band, your bandwidth is limited to 902-928 MHz (US…
For anyone else interested, the full paper is available here: http://conferences.sigcomm.org/sigcomm/2013/papers/sigcomm/p...
Backscatter refers to reflecting RF power. Ambient backscatter is modulating the reflections of the ambient RF signals as opposed to beaming a signal in from a source as RFID does. The device you built uses the incoming…
It seems like this would work over extremely short distances since the carrier signals at tags A and B are basically the same. If ambient backscatter is going to be implemented over a larger area, the multipath or…
> The devices could pickup the signal and estimate the location very precisely, down to inches - so it is definitely a technology that could be used to indoor-navigation for robots, machines in the factory or doctors in…
But MIT did this, so we should carefully point that out in the title so it is newsworthy. </unbridled snarkiness>
I'd argue that what you want to do is write English language as you're accustomed. Paragraphs with multiple sentence in a single line. What you'd like Git (or whatever your diff'ing program) to do is parse the…
I think the question to ask is why are the professors who tackle writing these books going through such distribution chains? It is not the monetary incentive. My friends who have contributed chapters to books generally…
Well, the photophone was actually a much cooler device anyway. Experimental wireless transfer of human speech over 200 meters from a completely passive device using optical scattering? In 1880? Sweet! The receiver was…
There was an article the other day posted on this. It operates at 24 and 60 ghz whereas most RFID is in the UHF (900 MHz band). This radio harvests energy to run an oscillator and actively transmits data whereas RFID…
Maybe you can describe this a bit more. The Great Seal Bug was used for wireless audio recording in the 40's, but this operated by using a microphone/cavity to modulate the load of an antenna; thereby embedding audio in…
Its far-field, so it couples completely differently than NFC tags. Also, NFC communicates by reflecting signals, this device communications by active transmission (according to the article, I haven't read their paper…
I do see your point but still, a newborn cannot support their head by themselves. Having the muscle ability to be able to hold ones head up is a fairly good prerequisite for being able to walk.
>I'm hoping for precise indoor navigation, Google and Apple are currently working on that. All you'd have to do is walk around with your phone, measuring signal strength and then visualize that. I'd wager there are _a…
Maybe I'm reading the article wrong, but it seems they are only describing a way to record EMG signals --- and not a way to `control' anything. I've previously worked in neural/EMG recording of flying insects and a…
While I agree with you, its worth noting that newborns do exhibit a walking reflex (that usually disappears after a few weeks). I would not completely rule out the possibility of a newborn walking with an exoskeleton --…
What then is the research barrier they need to cross? I'm genuinely curious. This seems more "researchy" than a lot of other items I've read (such as optimizing a planar antenna geometry with included matching network…
To be fair, any animals that use body language (i.e. dogs wagging tails) or sight are communicating electromagnetically (reflected light) in the same we humans communicate electromagnetically. We're not generating our…
>The most irritating thing was the keyboard which could not be mapped in the "standard" PC way (i.e. Ctrl Super Alt in the bottom left). That's funny. After using a mac for several years, that's my biggest gripe about…
This is actually one of the biggest reasons I am still in Mac OS. Are there any *nix builds or distributions that have this separation out of the box? I.e.: C-b, C-a, etc (emacs commands) including C-v for scroll (and…
From what I've seen of their demos (going off memory), they focus on power transfer to a single device. Their efficiency drops to near 0% when multiple devices are being powered. I have a hard time getting excited about…
Clicking "how does it work" and scrolling down has a link to a paper published in ubicomp 2010 detailing the CMOS chip and modulation. They seem pretty open about the technology to me.
Is soul the imprecision of notes not being perfectly uniform in duration and velocity? That's what your above comment seems to imply. For instance: Consider a recording from a piano played by a human and a…
I agree with your sentiment, but sadly science (or rather, the doing of science) is about prestige. Put yourself in the shoes of a funding agency. If you have two grant proposals, one from somebody at an institution in…
I can't find details of his hack, but I am curious if his detector detects actual read events (when his device responds with its ID) or if it is just an RF power detector. Is there a link to a technical description?
From my reading of the rules, you are limited to broadcasting +36 dBm EIRP (30 dBm [1W] into a 6 dBi antenna -> 4W EIRP). This can be a single frequency. In the 900 MHz band, your bandwidth is limited to 902-928 MHz (US…
For anyone else interested, the full paper is available here: http://conferences.sigcomm.org/sigcomm/2013/papers/sigcomm/p...
Backscatter refers to reflecting RF power. Ambient backscatter is modulating the reflections of the ambient RF signals as opposed to beaming a signal in from a source as RFID does. The device you built uses the incoming…
It seems like this would work over extremely short distances since the carrier signals at tags A and B are basically the same. If ambient backscatter is going to be implemented over a larger area, the multipath or…
> The devices could pickup the signal and estimate the location very precisely, down to inches - so it is definitely a technology that could be used to indoor-navigation for robots, machines in the factory or doctors in…
But MIT did this, so we should carefully point that out in the title so it is newsworthy. </unbridled snarkiness>
I'd argue that what you want to do is write English language as you're accustomed. Paragraphs with multiple sentence in a single line. What you'd like Git (or whatever your diff'ing program) to do is parse the…
I think the question to ask is why are the professors who tackle writing these books going through such distribution chains? It is not the monetary incentive. My friends who have contributed chapters to books generally…
Well, the photophone was actually a much cooler device anyway. Experimental wireless transfer of human speech over 200 meters from a completely passive device using optical scattering? In 1880? Sweet! The receiver was…