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aDfbrtVt

305 karma · joined November 3, 2018

Optical Communications DSP Engineer
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aDfbrtVt··on Zotero 6
The Apple Pencil support is still pretty rough, but it's been getting better every update version. I've been using it for the last couple of months.
aDfbrtVt··on Zotero 6
The notes functionality along with the new iOS beta is amazing. Makes marking up papers on an iPad very convenient. I would encourage every who uses Zotero to sign up for a paid storage plan to help support development.
aDfbrtVt··on Mold 1.1
Great to see that Mold now has support for LTO. Hope I can begin using it as my default linker in Arch soon.
aDfbrtVt··on Twitter Permanently Suspends Marjorie Taylor Greene’s Account
Thanks for the link, it is always a pleasure to learn from Ken White. The right to free speech (fortunately) seems to have evolved significantly since World War I! It would appear that the modern test to determine first amendment exemption is Incitement to Imminent Lawless Action and was established in Brandenburg v. Ohio in 1969 [1][2].

* Advocacy of force or criminal activity does not receive First Amendment protections if (1) the advocacy is directed to inciting or producing imminent lawless action, and (2) is likely to incite or produce such action. *

From that quote, I think it is pretty clear that the posts from Marjorie Greene would not pass the test and are thus eligible for first amendment protection (if Twitter was a government entity).

Caveat: Not an American, just a curious neighbour to the north.

[1] https://mtsu.edu/first-amendment/article/970/incitement-to-i... [2] https://mtsu.edu/first-amendment/article/189/brandenburg-v-o...

aDfbrtVt··on Twitter Permanently Suspends Marjorie Taylor Greene’s Account
The post that got her suspended claimed “extremely high amounts of Covid vaccine deaths.” per the NYT article. I was unable to find a screenshot of the original tweet, seems to have been deleted.

A cursory look at the raw VAERS data from the CDC[1] shows:

Reports of adverse events to VAERS following vaccination, including deaths, do not necessarily mean that a vaccine caused a health problem. (...) During this time, VAERS received 10,688 reports of death (0.0022%) among people who received a COVID-19 vaccine. CDC and FDA clinicians review reports of death to VAERS including death certificates, autopsy, and medical records.

In contrast, the CDC[2] estimates that 817k people have died of Covid-19 in the US which puts the mortality at 248 deaths per 100k individuals. Currently, an unvaccinated individual has 20x the risk of dying from Covid-19 than someone with a booster.

I am no first amendment scholar, but spreading lies that increase people rate of mortality by 20x seems pretty close to the "shouting fire in a crowded theater" exception to protected speech. That puts aside the fact that Twitter is a private platform, thus first amendment laws do not apply.

[1] https://www.cdc.gov/coronavirus/2019-ncov/vaccines/safety/ad... [2] https://www.cdc.gov/nchs/covid19/mortality-overview.htm

aDfbrtVt··on FAA Shows ‘Sample NOTAMs’ for Possible 5G Restrictions
I’m not sure I follow how phase noise is related to an interfering channel emitting meaningful radiation 100MHz out of band. If all of these transmitters are compliant then it’s a non-issue. I’ve also never seen a transmitter where phase noise was more of a factor than IF in the context to out of band emissions.

Could you elaborate on how phase noise would cause an issue in this scenario?

N.B. Most of my experience is in optical systems, my wireless knowledge is limited.

aDfbrtVt··on FAA Shows ‘Sample NOTAMs’ for Possible 5G Restrictions
That's why virtually every RF frontend oversamples sufficiently to do the sharp filtering in DSP.
aDfbrtVt··on FAA Shows ‘Sample NOTAMs’ for Possible 5G Restrictions
How could the 200MHz spacing between the frequency allocations be insufficient? I can't imagine the oscillators in either system are specified for deviations as high as +-100MHz over their lifetime.
aDfbrtVt··on A New Basis for Shifters for Existing and Advanced Bit Manipulations (2009) [pdf]
A couple of obvious reasons you can't reduce the address resolution to single bit:

- Mux complexity would be drastically increased which costs area, power and latency.

- Additional gearboxing around SRAM's would be far more complex.

aDfbrtVt··on Matrix? No, Thanks
I don't believe the author has come anywhere close to providing enough evidence that "(...) Matrix was created by an Israeli intelligence agency."
aDfbrtVt··on Matrix? No, Thanks
The argument structure of this post comes off as disingenuous. You can't make detailed statements and then hand wave the issues away as FUD. If you make a claim, you need to stand behind it and be prepared to defend your statements.
aDfbrtVt··on Linux distro creator tries to enforce a trademark he doesn't own
Agreed, the request was very polite and seems totally reasonable. While I don’t think you can call digging up public fillings dox-ing, I don’t see any reason for the developer not to respect the request.
aDfbrtVt··on Japan’s Sixth-Gen F-X Fighter Jet
It's still a pretty simple system with direct detect optics, especially on such short distances. Transceivers are really inexpensive for relatively low throughput (<40GE) applications.

They do very thorough HFSS simulations for fighter jets, having RF noise immunity without having to use heavy shielded wiring is a great benefit.

Splicing can be rough, but it's by no means impossible. With the right equipment, you can expect <0.3dB loss from a splice. That's not a lot in these very short links.

aDfbrtVt··on Lawrence Livermore claims a milestone in laser fusion
For further context, the fastest oscilioscopes commercially available (Keysight UXR) samples at 256G with 20fs (rms) of jitter. Modern coherent optics runs at over 100GBaud, a picosecond is 1/10th of a symbol period.
aDfbrtVt··on Julia Computing raises $24M Series A
What kind of HW do you have? I did some work with the NI version of the USRP B210 using C++ and was pretty impressed with the quality of the FW and libraries. I hope to give it a try with Julia and UHDBindings.jl
aDfbrtVt··on Chisel/FIRRTL Hardware Compiler Framework
Thanks for clarifying, I was under the (false) impression that Chisel was used for HLS. I know of a few companies working with SystemC and UVM-ML to accelerate verification. Having closer ties between design and verif becomes absolutely essential when you’re flow is accelerated.

I’ve personally used HLS C++, GTest and UVM. It’s pretty effective but there’s definitely room for improvement.

aDfbrtVt··on Chisel/FIRRTL Hardware Compiler Framework
I'm very surprised by the reported cost to verification. One of the major reasons to move to a high level synthesis design strategy is to ensure equivalence between your models and RTL.

I have experience with C++ HLS and it has enabled massive reductions in verification time.

aDfbrtVt··on Use Alacritty instead of Termite
Awesome, thanks for the tip!
aDfbrtVt··on Use Alacritty instead of Termite
Does Alacritty still require you to copy terminfo to remote servers in order for backspace to work? I loved Alacritty, but copying terminfo every time gets old pretty quickly.
aDfbrtVt··on Evolution of Random Number Generators
There's a bunch of analysis written by the PCG folks bashing Xoroshiro as well [1]. I think that for most normal use cases with randomized state, Xoroshiro is quite good. It only requires a single 64b add which is amazingly efficient.

[1] https://www.pcg-random.org/posts/xoshiro-repeat-flaws.html

aDfbrtVt··on QNAP ships NAS backup software with hidden credentials
I use one of these chassis [1], the form factor is great. Be mindful that some of the bracing blocks the pcie slot on some motherboards.

[1] https://m.aliexpress.com/item/33038670915.html?spm=a2g0n.pro...

aDfbrtVt··on Fedora Linux 34 is officially here
I’ve been running F34 for about a month now. The move to pipewire has been pretty much flawless. Multi-monitor Waybar is broken with F34 but that’s not the fault of Fedora.
aDfbrtVt··on Enabling the WSL to include support for Wayland and X server related scenarios
Possibly? Initial commit on FreeRDP is from 2011 while the oldest version listed on Microsoft's website is v0.01 from 2007. Not sure if that version of the documentation was publicly available.
aDfbrtVt··on Enabling the WSL to include support for Wayland and X server related scenarios
FreeRDP is not quite reverse engineered, the software built based on open specification for RDP[1]. That being said, I would be surprised if the FreeRDP contributors did not need Wireshark during development.

[1] https://winprotocoldoc.blob.core.windows.net/productionwindo...

aDfbrtVt··on Muboard: Mathematics Chalkboard with LaTeX and Markdown Support
100% my experience as well. I would love to have a quick way of having my handwritten equations rendered to latex (possibly with errors) and easily import into a markdown/latex document on my desktop.

What's your workflow to go from handwriting (on iPad?) to mathpix to desktop?

aDfbrtVt··on Muboard: Mathematics Chalkboard with LaTeX and Markdown Support
Notability (almost) does that, and manages to correctly understand very complicated expression with poor penmanship. It currently doesn't support exporting of actual Latex, just the rendered equation.
aDfbrtVt··on A US Startup is about to release a CPU that could threaten Intel AMD, and Nvidia
No mention of process node or TDP...
aDfbrtVt··on Interview with CEO of rsync.net: “no firewalls and no routers”
Thanks for the interview, I was pleasantly surprised to see how simple the network architecture is at rsync.
aDfbrtVt··on Did Schnorr destroy RSA? Show me the factors
I'm guessing it's a shorthand for the order of units of work. log2(8.4E10) = 36.3 bits of operations
aDfbrtVt··on Encrypted Backup Shootout
I get that performance is interesting to graph, but it's very much secondary in importance when compared to the backup solution being bulletproof. I've found encrypted Borg very difficult to get wrong and setup is very simple. I've also successfully recovered two systems with the tool without issue.

Not saying that Borg is necessarily the best solution, just that we should evaluate the important metrics.

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