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That’s actually crazy. Any internet archive is bound to also contain less savory parts of it which could be removed on request. Such a blanket ban doesn’t do anything to solve the issue while simultaneously making people’s lives worse
For great justice, does anyone know of any applications (other than Maple) that support WYSIWYG typeset input (not output) like Maple does?
As far as I know, Wolfram/Mathematica, LaTex, SymPy, Jupyter, Sage etc all rely on typewriter text for composing and inputting math. For this (and only this) reason, Maple is the only application that ever resonated with me, because input may be written in the same form it's written by hand, and it's baffling this capability isn't more commonplace. Is this a barrier to anyone else?
First standout thing I noticed is the “patern generator” array of DIPs - admittedly without having dived into the paper, any answers from the hive mind what they’re doing?
> Synchronous voltage pulses are sent to both the electrode of the strip connecting to the gate and drain electrodes of the MOSFET. The drain pulse is applied for around 1.1 ms at a constant voltage. The gate pulse starts at 40 μs after the drain pulse and ends at 40 μs before the end of the drain pulse.
> the antigen-antibody complexes undergo stretching and contracting, akin to double springs, in response to a pulsed gate electric field. This motion across the antibody-antigen structure, corresponding to the pulse voltage applied on the test strip, induces an alteration in the protein's conformation, resulting in a time-dependent electric field applied to the MOSFET gate. Consequently, a springlike pattern emerges in the drain voltage waveform due to the external connection between the sensor strip and the MOSFET's gate electrode.
So they shake ‘em just so, and listen to the response…
ICs are perhaps variable timing & pulse-shaping logic?
I was focusing more on the "current to frequency" stage, which looks like an empty IC socket. As is the "pulse width counting" stage just a bunch of header pins?
I mean yeah, I get it, it's a prototype and a finished product will be on a $2 ASIC to drive the correct signals and etc. But I'm not up to speed on affinity sensors vs. traditional ELISA tech so <internet shrug>.
Nothing jumps out at me as being fishy here. There's what appears to be a small device mounted in the middle of that empty socket. It's also possible some of the rest of the pins on the socket are being used as test points. A circuit diagram would have be good to have here.
Breast cancer is a terrible disease, and I don't mean to be a downer but my BS detector is screaming on this one. I'd give the device image a pass if were just a journalist grabbing a stock PCB image, but that doesn't seem to be the case here. Anyone with even a trivial knowledge of electronics would be amused by the callouts. And all for just $5? After Theranos I guess I'm a bit sceptical of claims such as this.
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