jpmattia

14 ms·

121.
by jpmattia 4y ago
> This is known as "forward error correction". Fun factoid: Reed and Solomon were working at MIT Lincoln Laboratory (ie where the OP result is from) when they invented RS codes. ISTR they were also working on satellite comm,
122.
by jpmattia 4y ago
Antisemitism is disgusting in any context, but doubly so on HN.
123.
by jpmattia 4y ago
It's a nice guide, and it will be very useful to a large number of folks. > Feedback is very much appreciated. Nothing about captions that I could find quickly, which seems like an oversight.
124.
by jpmattia 4y ago
Oh god, I sense this thing is trying to make us write essays to back up the titles. My favorite so far: "Why isn't Linux perfect?"
125.
by jpmattia 4y ago
> Most bitcoin investors never move their coins off the exchange I'm curious: What is your source for this statistic? For comparison: There were about 40M non-zero addresses earlier this year. See eg https://news.bitcoi
126.
by jpmattia 4y ago
Note how they measured that the "Vast Majority of People Who Invest in Bitcoin Inevitably Lose Money" is > the report did assume that a user purchased bitcoin when they downloaded a crypto app. Look directly at the blockchain
127.
by jpmattia 4y ago
And then we have Grothendieck's prime (57), just to keep life interesting.
128.
by jpmattia 4y ago
Fair enough, edited.
129.
by jpmattia 4y ago
> is the extra layer of indirection in any discipline when things are named after people and not the thing’s characteristics. "Eigen" in German has same English root as "own": "Eigenvalue" is Germanglish f
130.
by jpmattia 4y ago
Can confirm: If you're into crossword puzzles (and maybe even if you're not) it's a fun documentary. https://www.imdb.com/title/tt0492506/
131.
by jpmattia 4y ago
> Most linodes have fixed IPs. We run some Windows instances, which were DHCP out of laziness. <facepalm> [edit: It's a PITA to fire up a Windows instance on Linode. Once working, switching out of DHCP is near the bottom of
132.
by jpmattia 4y ago
The JAMA article is open and has more precise info: https://jamanetwork.com/journals/jamanetworkopen/fullarticle...
133.
by jpmattia 4y ago
My first real job was 1986: Having a "stable" personal life was something employers would "need" to know. And god help you if there was a gap on your resume; it was advertising your deviancy. Such attitudes all changed d
134.
by jpmattia 4y ago
I find that interesting, and am curious: > instead you use a randomly generated symbol/bit sequence which fits into the memory of the DAC. How do you guarantee coverage of the entire spectrum? As I mentioned above, PRBS(N) has eve
135.
by jpmattia 4y ago
> So "These wavelengths are generated from an array of lasers, forming a frequency comb" is using "frequency comb" to mean something else in that sentence. Yes, "frequency grid" would have been better term
136.
by jpmattia 4y ago
Congrats to you and team on these results. > And novelty indeed lies in the width of the comb source and the SNRs of the obtained channels. Can you expand on this? I'd be curious how it compares to a traditional (multi-laser) WDM
137.
by jpmattia 4y ago
> How do they generate data at that rate to transmit? In the lab, the most common scenario is to have a pseudo-random bit sequence (PRBS), and usually the sequence is 2^31-1 bits long. This makes both the generation (on the transmit s
138.
by jpmattia 4y ago
> Why is the headline misleading? for reference, the headline is currently "Record-breaking chip can transmit entire internet's traffic per second." The "chip" is a CW laser, so it transmits no data. It's
139.
by jpmattia 4y ago
I have not dug deeply into the technical content, but the headline as written is pretty far off the mark. I believe the press release is here: https://www.dtu.dk/english/news/all-news/new-data-transmissi... T
140.
by jpmattia 4y ago
> Rather, 300-500 cell phones all trying to contact the next cell tower, multiple times per minute, would wreak havoc on cell service. I'm probably being a simpleton, but this sounds like inadequate firmware to me. At the very lea
141.
by jpmattia 4y ago
> In 2020, Garfunkel read a book called "Hello Darkness, My Old Friend". I looked it up. It's not about him. It turns out it does involve him: It's by Art Garfunkel's college roommate, who goes blind in Junior
142.
by jpmattia 4y ago
> I recommend Jabra Elite 75t. Discontinued as of this month: "FYI Our current top pick, the Jabra Elite Active 75t, has been discontinued and is no longer available." https://www.nytimes.com/wirecutter/r
143.
by jpmattia 4y ago
First: Congrats on attacking this space. I think there is all sorts of need in the self-managed care world. That said (you just knew there was going to be criticism :) > Overall, we recommend healthy lifestyle habits versus drugs to man
144.
by jpmattia 4y ago
He was also a very good lecturer: I took a probability class with him (he had stopped teaching the DiffEq course by the time I went through.)
145.
by jpmattia 4y ago
> I never thought electron drift velocity could be 1E6 m/s. That's wild. GaAs, InP, and InAs have measured max electron velocities in the ballpark of 300,000 m/s, which is ~ 1/1000 of c. So they're listing grap
146.
by jpmattia 4y ago
Excuse the simpleton question: > When creating these TBG samples, we used to literally tear the graphene in half, to get accurate relative alignment of the two halves. It was very clever, but it imparts a huge amount of strain to the tw
147.
by jpmattia 4y ago
> How would you apply that observation to Wikipedia? I would notice that the Wikipedia reader base is a multiple of peer-reviewed scientific-paper base. While I don't know what the multiple is, I would guess the range is 1-2 order
148.
by jpmattia 4y ago
As an observation, I think "If you're not paying for it, you're the product" applies here. In traditional publishing, the people writing the papers are the product. Journals compete to get the best papers, and those that
149.
by jpmattia 4y ago
ATT Bell Labs -> Lucent Bell Labs -> Alcatel Bell Labs -> Nokia Bell Labs. The first step was a corporate breakup, the others were corporate purchases. (I was there during Lucent days.)
150.
by jpmattia 4y ago
Might be worth noting: There is a DOJ antitrust lawsuit against NAR over MLS practices, though I don't know if your use-case is part of that. https://www.justice.gov/opa/pr/justice-department-files-anti...

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