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<rqou>
i just learned about an amazing technology
<rqou>
negative capacitance FETs
<rqou>
cc azonenberg
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<cr1901_modern>
negative impedance converters are nothing new?
<rqou>
not the same thing
<rqou>
a FET with a region of effective negative capacitance by adding ferroelectric material to the gate
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<awygle>
Oh yeah I saw that when I was doing fram research a while back
<awygle>
My device physics is not good enough to really appreciate it though
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<awygle>
I guess adding more FETs would make a net faster or something?
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<rqou>
i don't understand the physics too well either
<rqou>
but apparently the negative capacitance can make the FET "better" because you get effectively "more" gate voltage
<rqou>
apparently "how to combine with a FRAM process" is still an open question
<rqou>
but that's definitely something that they want to do
<rqou>
ferroelectric materials are weird
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<cr1901_modern>
"more" gate voltage _range_, or higher magnitudes possible relative to gnd?
<rqou>
more effective voltage
<rqou>
imagine a voltage divider with capacitors
<rqou>
now make one of them negative
<cr1901_modern>
oh, so you make voltage appear "from thin air"?
<rqou>
kinda
<rqou>
except it's not "from thin air"
<cr1901_modern>
of course, I'm just handwavy tonight
<rqou>
the dissertation talk i attended specifically discussed this
<rqou>
there were concerns of "where did the energy come from?"
<rqou>
but essentially the tl'dr as far as i understood it is:
<rqou>
when you charge and discharge a normal MOS cap, the energy is just wasted
<rqou>
but the ferroelectric material can capture and retain some of that energy
<pie_>
ah
<awygle>
A sci fi book I read once described these super-thermoelectric materials as having "intrinsic potential" and I thought of ferroelectrics immediately
<awygle>
That stuff is magic
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<pie_>
heh
<pie_>
magnets
<pie_>
how the fuck do they worj
<awygle>
YIL that the fly height of a modern hard drive is 0.8nm
<awygle>
Which seems pretty unlikely
<cr1901_modern>
Totally unrelated (not really): I wonder what is the minimum distance we are capable of moving our finger (in millimeters) in response to a neural stimuli?
<rqou>
i don't know about that, but minimum detectable surface height variation is ridiculously small
<qu1j0t3>
probably somebody has measured it.
<cr1901_modern>
Basically: How lightly do I have to touch the head of a modern hard drive to not break it :P?
<rqou>
apparently humans use a lot of superresolution techniques (vision definitely does)
<pie_>
any yet birds still hve better eyes apparently
<pie_>
ok *somme* animals at least
<lain>
I recently learned something fascinating about vision.. apparently different parts of the brain process it in their own way, separately
<cr1901_modern>
superresolution techniques?
<lain>
there were some tests where people with functioning eyes but no /vision/ were able to run through a room avoiding obstacles
<lain>
if they walked, they ran into stuff, because the part of the brain responsible for instinctive object avoidance wasn't doing anything
<cr1901_modern>
that's... weird ._.
<lain>
iirc it was only applicable to people who lost normal vision through some sort of brain .. thing
<Bike>
Oh, I know about that! Though I forgot the name off the top of my head.
<lain>
but this is why for example athletes can react to things faster than their conscious mind can process the visual input
<Bike>
It's actually just an example of more general problems where people sort of lose self-check capability.
<lain>
because a completely separate, specific-purpose part of the brain is reacting to the input at a higher rate
<Bike>
Though I think the obstacle thing might have failed a replication lately
<lain>
oh? interesting :D
<Bike>
yeah let me see if i can find a link
<Bike>
"anosognosia" is the general term
<Bike>
wait. no i completely misread this. that's unrelated
<lain>
there's also the whole split brain stuff, which is just insane :D
<Bike>
which is not to say that there aren't lots of pathways. Did you know that in addition to rods and cones, there's a third kind of light sensitive cell that just feeds circadian rhythms?
<lain>
huh, I did not know that!
<cr1901_modern>
There's also fourth color cones IIRC?
<Bike>
tetrachomacy, yeah.
<Bike>
i mean they're pretty rare.
<awygle>
That's x-linked right? Or something like that?
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<rqou>
hmm, google knows that when i search "berkeley library catalog" i want oskicat and not the public library catalog
<rqou>
the power of machine learning(tm)
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<pie_>
azonenberg, my sister asked me to get her some winter gloves for her birthday, given that youre the local not die bz going outside expert, zou have any recommendations?
<pie_>
s/z/y
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<awygle>
TIL about DOH - DNS over HTTP
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<pie_>
not even http over dns? :P
<awygle>
It's to prevent institutions from blocking or diverting DNS traffic as an instrument of policy, apparently
<qu1j0t3>
LOL
<qu1j0t3>
as if that would ever happen
<balrog>
awygle: I've seen A LOT of that
<balrog>
(diversion of DNS)
<balrog>
but I'm seeing more and more of blocking at firewall level (using a transparent/"invisible" proxy)
<awygle>
balrog: meaning packet inspection at the HTTP layer?
<balrog>
awygle: comparing IPs/hostnames against e.g. Palo Alto Networks' PAN-DB
<balrog>
and then providing forged traffic if it's a banned site
<awygle>
balrog: ah
<balrog>
(which of course breaks with HSTS)
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<awygle>
Seems like there are ways to solve that as long as the adversary wants to allow _some_ internet traffic
<rqou>
although i do have to admit that the marketing of EV was quite impressive at convincing people it definitely added value and wasn't just a racket
<rqou>
they even got browser people to add special codepaths just for them
<qu1j0t3>
yeah it stank
<awygle>
Our security consultant guy just gave a presentation about why we should own our PKI. I was impressed that he didn't respond to "but our customers trust the cert vendors" with "then our customers are idiots"
<rqou>
at least I'm glad we finally killed the shady-as-heck formerly-Israeli CA with the green website
<cr1901_modern>
I hope the person who created that acronym was a Simpsons fan
<rqou>
why?
<cr1901_modern>
Oh I was talking about awygle's "TIL" and didn't scroll to see that I'm 40 minutes behind