Viewing profile — henrikeh

While some comments do point out the general opaqueness of Mathematica, the goal of Simplify is actually documented in Mathematica and something which can be changed: https://refer…

I think Mathematica’s documentation is beyond excellent. Here is the documentation for the Flatten function: https://reference.wolfram.com/language/ref/Flatten.html Just look at th…

I don’t know about this cable specifically, but it can be done by transferring more power to the optical signal. Erbium-doped fiber amplifiers work by utilizing a nonlinear optical…

> I used to work at a hedge fund known for its diagnosis process, a logical process of clearly defining the suboptimal outcome that occurred, agreeing on how it should have gone an…

Ada / SPARK can do that. Ada has had some form of that analyses since the first version from 1983. https://learn.adacore.com/courses/intro-to-spark/chapters/03...

We used constellation shaping and a rate adaptive code to tailor tailor the bitrate of each channel. It varied between something along 64-QAM and 256-QAM depending on the SNR in th…

Thanks :-) It is a while since I have been into optical signal processing, but I will ask my colleague who is much more well-versed.

I must confess that I have never been concerned along those lines. I have thought a lot more about the environmental impact of transmission technology. It is a massively energy con…

I worked on this project and cycomanic summarizes the practice well. I’ve written more on it here: https://news.ycombinator.com/item?id=33321506

I should clarify that we did measure every channel (polarization, wavelength and fiber core) individually. It would not be fair if we just measured one and multiplied ;) (And yes, …

Wrote another reply here: https://news.ycombinator.com/item?id=33321669 I’d say that there is at least a 10 year delay between the lab and commercial deployment. Even then we are t…

I can’t answer for the chip aspect (which is the truly novel part of this research), but many of the signal processing and coding techniques are being deployed in new optical trans…

Thanks! I’ve reached out to my colleague who worked on the chip side of this project.

The two other comments gave very good general answers, but I happen to have worked on this specific project, so I can give some very specific details (as far as my memory goes.) La…

The chip which produced the laser is indeed “just” CW with data modulated on separately. And novelty indeed lies in the width of the comb source and the SNRs of the obtained channe…

Late to the thread, but I took part of this research (7th author in the list). I worked on the signal processing, information coding etc and is happy to answer any questions :-)

Cell phone cells are (ideally) shaped to account for the expected pattern of how handover will occur. Along roads and train lines, the cells are (at least in GSM) supposed to be ta…

The article gives a few examples where a pseudo-class fits better with how CSS normally works. For example, the selector matches the last item in the selector. With ‘ You can also …

I do plan to write about the overall experience, but for now I keep a diary in the repo.

I have been reading it and implementing the interpreter in Ada to learn about both interpreters and Ada better. It is a wonderful way to learn, since I constantly have to go beyond…

In Denmark, so not the same as who you reply to. Yes, if you pay too much in tax and their calculations reveal that, then, yes, you get money back on your bank account. They don’t …

Do you have any sources on that? I can not find anything about those interacting or Perelman saying that he does not care about the axioms of his work.

At least not in the ones tested in the video. Also, the prewash happens in a cycle, where the soap holder isn’t opened.

Well, since you ask. `git add -i` has different "escape"/"exit" semantics for different actions. If I want to quit/escape adding a patch in the interactive mode I type `q` and then…

Here in Denmark we don’t, so most people have a passport.