HNHacker News
TopNewBestAskShowJobs

sohkamyung

85,183 karma · joined September 9, 2014

submissionscomments
sohkamyung··on The Physics Behind the Thumb on Hose Trick
The graphs are in the video. As stated at the top:

> [Note that this article is a transcript of the video embedded above.]

sohkamyung··on Sci-Fi Short Film “There Is No Antimemetics Division” [video]
You might be interested in this prequel to "Service Model": "Human Resources" [1]

[1] https://reactormag.com/human-resources-adrian-tchaikovsky/

sohkamyung··on Typesetting the "Begriffsschrift" by Gottlob Frege in Plain TeX [pdf]
I wonder if Typst [1] can handle this.

[1] https://typst.app

sohkamyung··on Termite farmers fine-tune their weed control
Off-topic: when I initially saw the headline, I thought it was about people farming termites. :-)
sohkamyung··on How I bypassed Amazon's Kindle web DRM
For reference, Libreture maintains a list of non-DRM bookshops [1].

[1] https://libreture.com/bookshops/

sohkamyung··on Bird photographer of the year gives a lesson in planning and patience
I take wildlife shots but mainly for the record, which I post on iNaturalist. On occasion, I do need to see 'slightly into the future' for some shots, like predicting where birds and flying insects might be when I'm tracking them for shots. (This can be hard for pollinating insects flying from flower to flower.)
sohkamyung··on Creative Technology: The Sound Blaster
An article that brings back memories for me, since I worked at Creative Technology (the Singapore HQ) from the CD-ROM days until recently. :-)

I was also one of the people who worked on the Nomad II MP3 player.

sohkamyung··on OSMAnd vs. Organic Maps
I still use OSMAnd because it can take photos (with GPS coordinates) at waypoints while recording a track.

I use this to take photos of images from my DSLR while on nature walks.

I later download the waypoint photos and upload it to iNaturalist to get the location information I need to link the location to my higher resolution camera images.

More reliable than linking my camera to my phone (via Bluetooth) to record the location info.

sohkamyung··on Physics of badminton's new killer spin serve
Yes, the Sidek Serve involves hitting the feathers first. The controversy over the serve was widely publicised in Malaysia (my birth country) at the time, as it was 'invented' by Misbun Sidek.

The Sidek family was a dominant badminton force for Malaysia during that period. [1]

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

sohkamyung··on RFC 9839 Unicode Character Repertoire Subsets
From the Introduction:

"The intended use is to serve as a convenient target for cross-reference from other specifications whose authors wish to exclude problematic [Unicode] code points from the data format or protocol being specified."

sohkamyung··on Toothpaste made with keratin may protect and repair damaged teeth: study
Open Access Paper: [ https://advanced.onlinelibrary.wiley.com/doi/10.1002/adhm.20... ]
sohkamyung··on Some Mathematicians Don't Believe in Infinity
The observable universe is finite, though [ https://en.wikipedia.org/wiki/Cosmological_horizon ].

"A cosmological horizon is a measure of the distance from which one could possibly retrieve information. This observable constraint is due to various properties of general relativity, the expanding universe, and the physics of Big Bang cosmology. Cosmological horizons set the size and scale of the observable universe."

sohkamyung··on There's a new acid in our rain – should we be worried?
Archive link https://archive.ph/NDiu3
sohkamyung··on Doctors Discover a Woman with Her Own Unique Blood Type
On Archive https://archive.ph/DiwIq
sohkamyung··on Brains Process Speech and Singing Differently
Archive link: https://archive.ph/q8v0U
sohkamyung··on Creating the Commodore 64: The Engineers' Story
I'm currently reading "Too Much Fun: The Five Lives of the Commodore 64 Computer" by Jesper Juul [1]. An interesting look at the history and influence of the C64 in games, the Demoscene and as a retro computer. He also has a companion website [2].

[1] https://direct.mit.edu/books/monograph/5883/Too-Much-FunThe-...

[2] https://jesperjuul.net/c64/

sohkamyung··on Tolkien Against the Grain
The line at the bottom of the article sounds a bit weird:

---

Gerry Canavan is chair of the English department at Marquette University and the author of Octavia E. Butler.

---

Gerry Canavan is the author of the book, "Octavia E. Butler (Modern Masters of Science Fiction)", not the author of the author. :-)

sohkamyung··on New study of birds shows citizen science can be trusted
I use iNaturalist to log my observations and I think one benefit of such platforms is the large number of eyeballs available: casual observers see things not captured in more formal scientific field work.

This happened to me: I saw an unusual bee while walking in a nature reserve. I posted it on iNaturalist and it got identified as a seldom seen bee. A bee researcher contacted me to get the location for a field study, resulting in a paper that documented the bee's natural behaviour.

Other iNat observers have spotted moths and insects that haven't been seen for decades, for example. In this way, citizen scientist are helping scientist to find out more about nature.

sohkamyung··on Libro: a command-line tool to track your books
It doesn't look like it can be used to track and cross-reference short stories.

Short stories can be stand-alone (web based), found in an anthology, a book collection or published in a magazine.

What would be nice is a tool to track where I read a short story (in anthology A, for example), and where the story can be found, which may be in more than one place (in magazine B, collection C, on-line, etc.).

This is, unfortunately, also not supported in many other book sites like Goodreads, etc.

sohkamyung··on Libro: a command-line tool to track your books
You mean like Ledger? [1]

[1] https://ledger-cli.org/

sohkamyung··on Hilbert's sixth problem: derivation of fluid equations via Boltzmann's theory
Article about the work at [1]

[1] https://www.scientificamerican.com/article/lofty-math-proble...

sohkamyung··on How to Recognize Woodpeckers by Their Drumming Sounds
Doesn't cover non-US Woodpeckers, so not useful to me here in Singapore.
sohkamyung··on Pakistan's 22 GW Solar Shock: How a Fragile State Went Full Clean Energy
Off-topic, but the image captioned "Including workers in traditional dress handling solar infrastructure" looks AI generated. The workers on the extreme left and right are standing on solar panels, and the one in the centre is holding some metal bars that merge Escher-like with the panels behind him.

Even the caption sounds like part of an AI prompt to generate the image.

sohkamyung··on NASA Successfully Acquires GPS Signals on Moon
While the headline says GPS, the article says signals were acquired from GPS and Galileo, which increases the number of GNSS satellites available to get a location fix.
sohkamyung··on PeerAuth, TOTP-based peer authentication in the post-truth world
Maybe a bug: I selected "Generate" and didn't notice that the QR code had been generated as it was off-screen. So I re-selected "Generate" a few times before I realised what was happening. Only, now I have two long columns of QR codes.

This was on Firefox Nightly on Windows 11.

sohkamyung··on When Bohr got it wrong: the impact of a little-known paper on quantum theory
Your book is on my to-read list. :-)
sohkamyung··on Mathematicians discover new way for spheres to 'kiss'
I'm not sure if this helps makes things clearer, but see this diagram for symbols in Quadrature Amplitude Modulation [1]. The valid symbols are mapped to certain points in the vector space. Now, imagine non-overlapping circles around each symbol. If a received signal falls within a circle, it would be mapped to that symbol in the centre of the circle.

This can be extended to 3-D or higher dimension spaces.

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

sohkamyung··on Turing Machines
I hope this LEGO Ideas Turing Machine gets turned into a released LEGO product [1]. It's not the first LEGO Turing Machine, but it is noteworthy because it is fully mechanical.

[1] https://ideas.lego.com/projects/10a3239f-4562-4d23-ba8e-f4fc...

sohkamyung··on Bluesky adds 700k new users in a week
Whenever people mention 'bird app', I think it's is ebird. Now, 'butterfly app' makes me think of iNaturalist. :-)

http://ebird.org/

https://www.inaturalist.org/

sohkamyung··on Quote Origin: I had exactly four seconds and Google had told me it wasn’t enough
The quote in full is: "I Had Exactly Four Seconds To Hot Up the Disintegrator, and Google Had Told Me It Wasn’t Enough"
Page 1 of 28Next →