HNHacker News
TopNewBestAskShowJobs

dieselerator

140 karma · joined January 18, 2020

submissionscomments
dieselerator··on The Basic Laws of Human Stupidity (1987) [pdf]
The number of responses here lends statistical support to the first basic law.
dieselerator··on How to make a Smith chart
No. Sorry, that is not a helpful comparison.
dieselerator··on Tapping into the World’s largest gold reserves
>Ultra-high precision analyses of volcanic rocks show Earth’s core is leaking into rocks above

That summarizes the article. There is no mention of "tapping into" it.

dieselerator··on The race to find GPS alternatives
> I don't think this is the right replacement for GPS. Perhaps someone here can correct me if I am wrong?

Though I do not agree with your reasons, I do think this Xona is not the right replacement for GPS.

dieselerator··on A new class of materials that can passively harvest water from air
Do you mean like an ultrasonic humidifier[1]?

[1] https://www.amazon.com/Ultrasonic-Humidifiers/s?k=Ultrasonic...

dieselerator··on Coffee for people who don't like coffee
> The idea that coffee can have any taste other burnt rubber was interesting.

That summarizes the article.

This is not a recommendation, but you can buy caffeine pills.

dieselerator··on Computational Complexity of Air Travel Planning [pdf] (2003)
> Are there any public, open, comprehensive datasets on flights?

Airlines and commercial aviation operators schedule their own flights. That is a dynamic schedulle. So, perhaps there is no "comprehensive data set".

However, FlightAware makes publicly available scheduled and completed flight data over many routes in the USA. You can search by route and get a list of flights.

Flight information includes filed departure time, route of flight, and speed. For completed flights actual time, altitude, and route is shown. For example, a search on the route Dallas/Fort Worth to Austin lists 45 flights.

I hope that helps.

dieselerator··on BPS is a GPS alternative that nobody's heard of
If planning/designing a timing system like this using existing antenna, why wouldn't you choose to use cellular base stations? The cellular network reaches most places with overlapping coverage and carries network time. The lowest cellular frequencies are adjacent the upper broadcast TV channels. Aren't modern cellular receivers what we call software defined radios? They can choose which channels to receive.
dieselerator··on Thinner Films Conduct Better Than Copper
The research looks detailed and interesting. However, I don't follow this summary article.

Digital circuits dissipate most of the energy charging and discharging capacitance. It must necessarily dissipate that as heat (except for a minor amount of electro-magnetic radiation). The interconnect resistance hardly matters. Of course RC relay can be a factor for some circuits. We can hope this reasearch leads to improvement there.

Power supply bus resistance can lead to voltage drops, but this research apparently studies layers much too thin for that application.

Did I missing something?

dieselerator··on Tom Stevenson on the deciphering of Linear Elamite
Thank you.
dieselerator··on Tom Stevenson on the deciphering of Linear Elamite
The article was interesting.

Can someone explain:

Why is it called "linear" Elamite?

Is there unicode for linear Elamite yet?

dieselerator··on Interlaken: The ideal high-speed chip-to-chip interface?
We don't see this replacing the memory-processor bus. That gives some indication of how ideal it is. I should add in my opinion memory interfaces are not ideal. Everything is a trade off.
dieselerator··on A new treatment for arthritis: Vagus-nerve stimulation
> I bought the equipment to try this myself

Cue the obligatory scene (42 seconds) from "Strange Brew" [0]

[0] https://www.youtube.com/embed/EojzfxXGxtE?start=4064&end=410...

dieselerator··on Bob Dylan takes us on a wide-ranging tour of songs he admires
While I prefer to make a positive comment, I think I should share this opinion for the possible benefit of other readers.

In my opinion that review is a complete waste of time.

My statement is not intended in any way as a judgement of Bob Dylan or his work.

dieselerator··on News Music Search Archive
Maybe not exactly nostalgia, but there is a term that serves: déjà vu

"The meaning of DÉJÀ VU is the illusion of remembering scenes and events when experienced for the first time." [1]

[1]<https://www.merriam-webster.com/dictionary/d%C3%A9j%C3%A0%20...>

dieselerator··on Why are plants green? To reduce the noise in photosynthesis
That is a fair question. This is what I find. [1]

Ultraviolet B UV‑B 280–315

Ultraviolet C UV‑C 100–280

[1] https://en.wikipedia.org/wiki/Ultraviolet

My read is "UVB" is the popular medicine way of saying UV is needed for the body to synthesize vitamin D. It was not considered necessary to point out part of the useful spectrum is in "UVC" territory.

dieselerator··on Why are plants green? To reduce the noise in photosynthesis
I think this might be a good place to add this reminder:

"Vitamin D is made when UV (more precisely, UVB rays) react with a compound (7-dehydrocholesterol) in the skin. The best rays for UV synthesis have wavelengths between 270–300 nm." [1]

[1] https://www.sciencelearn.org.nz/resources/1313-vitamin-d-and...

dieselerator··on Musico: AI Generated Music
You have to start somewhere, and this probably has a place.

Still, having become accustomed to live acoustic music, I find this generated stuff not engaging. Maybe after a few more generations it will get there.

dieselerator··on How the National Airspace System Works
Looking at more of the presentations, we see that this not "How the National Airspace System Works". Rather it is the plan for a next generation system that the FAA hopes to implement.

If you have an interest in this you can see how things are intended to change. A lot of it looks like intended automation of work presently done by controllers. It appears there could be some challenges. For example, weather affects the flow, and what happens when you miss your pushback time?

dieselerator··on How the National Airspace System Works
A series of voice descriptions with animations.

There are many terms and acronyms. I am familiar with the user side of the system. Without this background I would have a hard time following the narrative. Even so I find the descriptions unclear. I don't know of a good overview of the airspace system that does not also explain the rules of operation. I think those become too detailed for casual knowledge.

dieselerator··on Open Circuits – The Inner Beauty of Electronic Components
From the description:

"As you visually dissect the components’ insides, you’ll learn about how they work and how they were made."

We did that in school. Here are the layout photos. Draw the schematics. It was interesting.

dieselerator··on The Two Generals Problem
I previously heard this called "The Byzantine General's problem". I think there is a lot of discussion under that name.

for example

Back-To-Basic Reading: Byzantine Generals <https://news.ycombinator.com/item?id=13866732>

The Byzantine Generals Problem (1982) [pdf] <https://news.ycombinator.com/item?id=8697029>

dieselerator··on It took me 10 years to understand entropy
That's the problem with randomness.

The required Dilbert reference: https://dilbert.com/strip/2001-10-25

dieselerator··on Wordle and grep
This is an illustration that grep is a great tool, quick and easy to use.
dieselerator··on The Poison Papers: Hidden history of chemical and pesticide hazards in the U.S
> Reactive Oxygen Species is also reportedly quite harmful but I guess everything has its place.

Yes, I think it does. Reactive Oxygen Species (ROS) are generated as part of the metabolic pathway. That is in processes essential for life. Though the details of the biochemistry are beyond me, I recall Cytochrome c oxidase [1] produces H+ used to power ATP generation. Along the way it produces ROS. Of course there are other mechanisms for neutralizing the ROS. The point is ROS probably not something to get too agitated about.

[1] <https://en.wikipedia.org/wiki/Cytochrome_c_oxidase>

dieselerator··on New plant-derived composite is tough as bone and hard as aluminum
I guessed this might be buckthorn, but no

cellulose nanocrystals (CNC)

from the article:

"At the nanoscale, CNCs are stronger and stiffer than Kevlar. If the crystals could be worked into materials in significant fractions, CNCs could be a route to stronger, more sustainable, naturally derived plastics."

the original paper:

Printable, castable, nanocrystalline cellulose-epoxy composites exhibiting hierarchical nacre-like toughening

<https://link.springer.com/article/10.1007/s10570-021-04384-7> (paywall)

dieselerator··on Quantum friction explains strange way water flows through nanotubes
> “Our quantum friction theory provides the first reasonable explanation of what’s happening,” says Kavokine.

Now that a possible mechanism for water-carbon interactions is more clearly understood, there is great potential to harness the properties of nanoscale flows, he says. For example, there are proposals to develop new computer designs based on nanoscale water and ion transport.

---

new computer designs? Am I reading that right? It seems like a large extrapolation to that application.

dieselerator··on The Casio employee behind the “Sleng Teng” riddim that revolutionized reggae
It is an interesting read. I find inspiration in this story of composer Hiroko Okuda. When you work at doing your part to get the product to market you can't predict all the ways customers might use the product.
dieselerator··on We have jetpacks and we do not care
I find the article interesting in that it provides us a first person view of operating the machine. We get a perspective about the current state of jetpack development. We become aware a timer (ie, fuel gauge) is the primary flight instrument. I am happy to read about this rather than needing to have the experience myself.
dieselerator··on Update 67: Covid-19 Blood Clots
There is a thread on HN: https://news.ycombinator.com/item?id=29808728 "Antiplatelet and anticoagulant therapy resolves long covid in 24 patients" Many of the comments seem to diverge from the topic.

This link goes to a lecture explaining the source of the blood clots. Naturally, those clots do not immediately resolve when the viral infection is over. Though the lecture is detailed, I was able follow. You might like it.

Page 1 of 3Next →