alejohausner

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31.
by alejohausner 1y ago
Are you sure? The video I just saw on the BBC shows the tree being felled at its base! That's not pruning.
32.
by alejohausner 1y ago
Wow, that sounds scary. I hope it doesn't come back. Weird about the 4.2 PSA; that wouldn't have raised alarms, normally. I guess acceleration is as important as absolute values.
33.
by alejohausner 1y ago
This work by Gat and Gornish gives a great explanation for prostate enlargement. There's an article by Donaldson [1] that suggests a connection to vitamin K2: A large study from 2014 by Nimptsch et al found a strong inverse correlatio
34.
by alejohausner 1y ago
I don’t see how technology is going to stop lonely old people from falling for someone who says they love them. Human desire is stronger than reason.
35.
by alejohausner 1y ago
Books were expensive, because they were hand made. That’s probably the reason for low literacy. When the printing press was invented, there arose a huge appetite for books of all kinds. People learned to read, because they could afford bo
36.
by alejohausner 2y ago
Yes, I saw those spectra. No, I don’t see very much energy emitted for wavelengths >700 nm. If you look at spectra for stereotypical crappy white LEDs, they’re really no different. Everyone uses the same light emitting compounds, it see
37.
by alejohausner 2y ago
I don’t think manufacturers will make LEDs with strong deep-red emission. If they made LEDs that emitted lots of red light, they probably would have a peak in the red end of the spectrum. But since they’re not monochromatic single-wavelen
38.
by alejohausner 2y ago
The luxeon 2835 website that’s linked in the article has a data sheet for the LED source. Scroll down and you’ll see the spectra for various subtypes of that source.
39.
by alejohausner 2y ago
For me, the problem with this setup (and with most high efficiency LED lights) is the lack of red wavelenghts. Real sunlight has a substantial amount of energy in the very red end of the visible spectrum (700 nm) and also of course quite a
40.
by alejohausner 2y ago
Here’s the company they founded: https://prandtldynamics.com/
41.
by alejohausner 2y ago
Sailors used to die from scurvy in large numbers, before a connection to diet was discovered. People aren’t as smart as you claim.
42.
by alejohausner 2y ago
This reminds me of Victor Hugo’s famous poem, “Demain, des l’aube,” about visiting his daughter.
43.
by alejohausner 2y ago
It just occurred to me that the optimal sofa looks rather uncomfortable. There’s this narrow bit in the middle, which has very little room to sit on. You can’t lie down on it and take nap.
44.
by alejohausner 2y ago
You don't have to use cones. Paraboloids work too.
45.
by alejohausner 2y ago
That’s very funny. Good one.
46.
by alejohausner 2y ago
Not necessarily. Initialize the data to "Mountain" or "Valley" and run quicksort, and you get O(n^2) behaviour. Quicksort is best for randomized data. In fact, the best way to guarantee good performance from quicksort
47.
by alejohausner 2y ago
Ahh… the good old days. Usually when I walked all the way to the computer center to pick up my printout, it would say “syntax error on line 1”. The. I had to walk all the way back to the terminal room, and was a lot more careful the next t
48.
by alejohausner 2y ago
The article just below mentions two major sources: - failing septic systems, and spilled wastewater. Lots of household products like food packaging and carpets are coated with oil- and water-repellent PFAs. When you wash these products, t
49.
by alejohausner 2y ago
Typo in title: "shape" should be "shapes". Otherwise it's just a string of nouns.
50.
by alejohausner 2y ago
What I really would like to see is a car with a full command-line interface with a qwerty keyboard built into the steering wheel. Then you could type > setgear r ENTER To put the car in reverse. Of course people on hn could just
51.
by alejohausner 2y ago
I agree. Picketty is too tame. If those billionaires' wealth has risen from $200 billion to $1.2 trillion from 2010 to 2024, that implies an annual growth rate of 13%. Hence a YEARLY wealth tax of 10% would still leave room for grow
52.
by alejohausner 2y ago
Thank God that they did it in house, instead of giving a contract to Accenture!
53.
by alejohausner 2y ago
There's an episode in "The Sopranos" where Tony confronts a jewish man he has cornered: Ever heard of Massada? For two years, 900 Jews held their own against 15,000 Roman soldiers. They chose death before enslavement. And
54.
by alejohausner 2y ago
It’s not so much that I didn’t understand the principles behind continuity. It’s just that the way my teachers presented the material lacked historical context. After a BSc in pure math I discovered that I enjoyed applied math and CS much
55.
by alejohausner 2y ago
The story of Faust is about the dangers of knowledge and technology. If you know too much, you will eventually lose your soul. As this book review explains, with the enlightenment and industrial revolution, this fear of knowledge receded.
56.
by alejohausner 2y ago
When I took real analysis, I didn't get an intuitive sense of limits and all that delta/epsilon stuff. It was too abstract. Strangely enough, when I read David Foster Wallace's "Everything and More" on the history
57.
by alejohausner 2y ago
This article points to another written by Sharon Lerner at the intercept[1], which shows that, since the EPA was founded in 1974, ALL of the directors of its Office of Chemical Safety and Pollution Prevention went on to work for the pestici
58.
by alejohausner 2y ago
Here are the true vote totals, as reported by witnesses at the polling booths: https://resultadosconvzla.com/ It was a landslide for the opposition candidate Gonzalez, 67% to Maduro’s 30%. Sadly, the mathematical analysis i
59.
by alejohausner 2y ago
I memorized pi to 100 places in high school, but it didn’t get me any dates. The girls were more impressed by the jocks. I should have attended a more geeky high school.
60.
by alejohausner 2y ago
The RTGs on the Voyager spacecraft weigh 38kg. They initially produced 160 Watts. That sounds like a no-go to me.

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