HNHacker News
TopNewBestAskShowJobs

JorgeGT

6,161 karma · joined March 30, 2015

PhD Aerospace engineer, serial procrastinator.
submissionscomments
JorgeGT··on ChatGPT in Academic Writing
Forget the papers, if this thing writes grant applications...
JorgeGT··on The Elements of Scientific Style
Thanks! For the plots it's Arial and for the text in the author version, Charter and Cabin Condensed. Elsevier uses instead the (very expensive) Gulliver font for the text.
JorgeGT··on The Elements of Scientific Style
This is so painfully true, please, do yourself a favor and read the old papers of your field!

But, it takes courage to imitate our witty ancestors! I've been sneered at by many reviewers for my attempts ("unscientific style"?!). The best I've managed to pass through so far is starting a paper with a quotation from an old Agatha Christie novel: https://doi.org/10.1016/j.ast.2019.05.015 (free copy here: https://core.ac.uk/reader/237464116 or at your local Sci-hub domain).

JorgeGT··on Hewlett Packard HP-15C Simulator
I have one 15C that belonged to my grandpa and another that belonged to my dad. Alas, I wonder what fantastic piece of technology will I hand down the line!
JorgeGT··on What does the land under Antarctica’s ice sheet look like?
I think the old article (and thus the picture) is from the version 2 dataset, and now they have realeased version 3. I went ahead and rendered the version 3 dataset with QGIS: https://i.imgur.com/jj8B4D8.jpg

Edit: without the underwater parts: https://i.imgur.com/tR67Nwq.jpg

JorgeGT··on Boom takes the wraps off its supersonic Symphony engine design
I am even wondering if it's an AI-generated picture?

- Look at the top of the last two stages of the "low-pressure compressor", you can see like some "phantom" blade airfoils? And yeah, no stators at all...

- The "high-pressure compressor" is even more bizarre: each stage seems to have a slightly different, random chord length, the first stages' airfoils have alternating pitch/curvature resembling rotor-stator stages but in the last ones they forget about this...

- In the turbine casing they have included some grooves that resemble cooling channels or labyrinth seals but the shapes seem random?

- The primary and secondary dilution air holes in the combustion chamber are huge, like those of small RC gas turbine? No fuel injectors at all?

JorgeGT··on We just built the world’s largest 3D-printed aerospike rocket engine
It's very pretty, but for a 3D-printed aerospike that actually works, take a look at the work of Pangea Aerospace: https://www.youtube.com/watch?v=chDMW27iYoU
JorgeGT··on Is it time to retire the .gb top level domain?
Note that .cat is for the Catalan language, which is spoken in other places besides Catalonia, inside and outside of Spain. There is also .gal and .eus for the Galician and Basque (Euskara) languages as well.
JorgeGT··on To uncover a deepfake video call, ask the caller to turn sideways
We call it Voight-Kampff for short.
JorgeGT··on Detroit’s new personalized flight information board is straight out of sci-fi
Straight from the Minority Report 2002 movie. Add a beamforming loudspeaker array for personalized audio and that's it: https://www.youtube.com/watch?v=uiDMlFycNrw
JorgeGT··on Ancient Roman soldier carved a phallus with a personal insult in this stone
I wonder if the insult carried then the same meaning as in modern Spanish, i.e. «coward». It would make sense that the carver thought that trait to be a grave issue in a military garrison context.
JorgeGT··on The Magnetar, nature’s ultimate superweapon
I sometimes wonder how far is Musk from naming something Voice of the Whirlwind.
JorgeGT··on Heroku Security Notification
Boeing's acquisition of McDonnell Douglas being a sad exception to that rule of thumb.
JorgeGT··on Love Is Dead: Newly discovered letters and the royal murder-suicide at Mayerling
Actually it should be (2015), when the letters were actually discovered.
JorgeGT··on James Webb telescope reaches its final destination in space, million miles away
Well, the 737 is probably the worst aircraft to compare against, given it has been enlarged by 50% from the original 737-100 to the newer 737-900! https://upload.wikimedia.org/wikipedia/commons/b/bc/B737Fami...
JorgeGT··on Google Drive flags file only containing “1” for copyright infringement
"In order to review, please reach the top of HN"
JorgeGT··on Webb’s Journey to L2 Is Nearly Complete
Related very good news: thanks to the very precise orbital injection, Webb has excess propelllant that will be used for station-keeping, significatively prolonging the mission: https://blogs.nasa.gov/webb/2021/12/29/nasa-says-webbs-exces...
JorgeGT··on FalsiScan: Make it look like a PDF has been hand signed and scanned
This is actually an EU reglament, furthermore your Greek digital certificate should work everywhere in the EU! :) https://en.m.wikipedia.org/wiki/EIDAS
JorgeGT··on A CIA website was out of date about who runs the UK
For Spain it's not only outdated but they also changed the gender of one minister, "Manuela CASTELLS Olivan".
JorgeGT··on Mars rover detects carbon signature that may hint at past life source
Same. The reference appears to be "Depleted carbon isotope compositions observed at Gale crater, Mars, Proceedings of the National Academy of Sciences(2022). http://doi.org/10.1073/pnas.2115651119" DOI is not working yet but this is normal, however the link to PNAS seems broken indeed: https://www.pnas.org/content/119/4/e2115651119
JorgeGT··on Wish HN: Happy Holidays
¡Bon Nadal a tothom, HN!
JorgeGT··on Protected Content, Delete by Date, Device Management and more
There are witty alt texts in all figures in Telegram's blog posts. I would really like to know the ratio of (time spent writing the text) / (time spent coming up with the alt texts)...
JorgeGT··on Lego has designed a set that can't be taken apart
There is a LEGO separator tool for this: https://www.lego.com/es-es/product/brick-separator-630
JorgeGT··on BibTeX Tidy
> 2. Abbreviate journal names

This was exactly what I was going to suggest, it would be a great addition! And if someone from Overleaf is listening... ;)

JorgeGT··on Pangea Aerospace successfully hot fire tests the first MethaLox aerospike engine
The aerospike itself maybe? It's 3D printed in a fancy copper alloy, and copper burns green...
JorgeGT··on Space debris forces astronauts on space station to take shelter in return ships
Are we sure the X-37 doesn't have a robot arm to grab interesting bits of satellites? x)
JorgeGT··on Email from FBI Looks Odd
> Hang up and call the public phone number of the company A and ask for the John

Some time ago a HN user was approached by the CIA/FBI like this (they wanted help with a software he wrote). They told him to look up the public number for the agency and ask for agent whatever.

JorgeGT··on SpinLaunch completes first test flight with rocket-flinging launch system
It is certainly a good question. The closest I found was the guidance and control system for the HARP project (shooting satellites into orbit). According to Wikipedia: The components of the guidance and control assembly were integrated into a 6.25-inch diameter test projectile. Sun sensors, horizon sensors, telemetry packs, receiving/transmitting antenna, hydraulic systems, logic modules, and gas thruster attitude control systems were all test-fired to approximately 10,000 g's https://en.wikipedia.org/wiki/Project_HARP#Martlet_4_Control...
JorgeGT··on SPARCbook 3000ST: The coolest 90s laptop (2019)
My TEAC A-X55 Mark II sound amplifier manual comes not only with the full block schematic, exploded view but with the full BOM and even all the PCB printouts... you can basically build the thing from scratch: https://imgur.com/a/hZeWFUF
JorgeGT··on Hackernews.com
Same, it would be cool to color the favicons differently (looking at my multiple Grafana bookmarks...)
← PreviousPage 2 of 34Next →