awelkie

10 ms·

61.
by awelkie 9y ago
Very cool project. I wonder if compressed sensing would be useful here. In the paper they describe this custom (and seemingly ad-hoc) video compression algorithm that is suitable for the low-power device. Basically, the camera averages bloc
62.
by awelkie 9y ago
Definitely, this project is basically the Great Seal Bug but for photodiodes. The authors even mention the Great Seal bug in their paper.
63.
Announcing seL4 with RISC-V support(sel4.systems)
2 points by awelkie 9y ago|0 comments
64.
by awelkie 9y ago
There has been some recent work[1] towards backscatter video (actually from the same lab you linked to). The basic idea is the same as the "great seal bug"[2] except for photodiodes. I say "towards" because much of the w
65.
by awelkie 9y ago
I feel like there's an opportunity for a web platform for the collaboration of (independent) researchers. Some place where I could propose an idea and others could tell me why that idea doesn't work or if it's already been do
66.
by awelkie 9y ago
Sure, there are many possible generalizations, some of which are more intuitive than others. But it should be clear that n=3 is a specific case of this particular generalization, for which I think the intuition is clear, which should help
67.
by awelkie 9y ago
I think it can be explained just using intuition too. Instead of 3 doors, imagine there are 1e9 doors. Then you choose one door (at random), and the host reveals all but one other door. I think then it's clear why you would switch door
68.
by awelkie 9y ago
Are quantum computers useful for cryptanalysis in the case where you don't quite have the necessary number of qubits? Like let's say you want to factor an integer N, which would require n qubits, but you have a QC with only n&#x2F
69.
by awelkie 9y ago
I appreciate what you're saying, but for devices with long lifetimes things may not be so clear. Consider a wifi device with a >15 year lifetime. Let's say such a device was built with SDR and FPGA, it conformed to 802.11b, and
70.
by awelkie 9y ago
Wow. I'm a few months into a PhD after having worked at a startup for a number of years, I just completed my first project, and just a few weeks ago my advisor had the "you need to stop thinking like you're building a product
71.
On hygiene, intellectual and otherwise (1989)(cs.utexas.edu)
78 points by awelkie 9y ago|20 comments
72.
by awelkie 9y ago
I believe rust's safety guarantees are enough to ensure the soundness of passing data to/from interrupt contexts and interrupt handler re-entrancy. See rtfm[0] for an example and a good explanation. I think DMA handling can be mad
73.
by awelkie 9y ago
What kinds of things would you want proven correct about your code's interrupt handling?
74.
by awelkie 9y ago
The spatial resolution depends on the bandwidth of your transmission. An infinite-bandwidth signal is a delta in time, and gives infinite precision. Any finite bandwidth impulse will be a sinc in time, with temporal width proportional to th
75.
by awelkie 9y ago
Another potential issue is that ultrasound machines send out an impulse instead of a single frequency. So maybe the quartz crystal oscillators aren't good at producing a short high-bandwidth signal? That being said, there's a type
76.
by awelkie 9y ago
Of course it would. I'm saying easy p2p transfer may reduce the usage of Dropbox, not obsolete it.
77.
by awelkie 9y ago
It seems to me that there are disadvantages to widespread IPv6 adoption for some big companies. For example, storage providers like Dropbox or Google Drive would take a hit if I were able to send files via a direct connection to a friend&#x
78.
by awelkie 10y ago
There is some discussion on that here: https://github.com/rust-embedded/rfcs/issues/23