HNHacker News
TopNewBestAskShowJobs

BryanLegend

333 karma · joined October 14, 2020

submissionscomments
BryanLegend··on EV Charging Points in America Are Finally Making Money
Zero mention of everyone switching to the Tesla connector. Seems like a huge part of the story that was totally left out.
BryanLegend··on EV Charging Points in America Are Finally Making Money
About $25/month in Utah. $0.03/mile
BryanLegend··on Jupiter's ocean moon Europa, thought to be habitable, may be oxygen-starved
Yeah, oxygen is surely the more exotic part of water. The hydrogen is far more common.
BryanLegend··on Stability.ai publishes technical report on Stable LM 2 1.6B
We’ve published our technical report on Stable LM 2 1.6B; our state-of-the-art small language model trained on multilingual data. This in-depth study covers the training methods utilized for both the base and instruction-tuned versions of the model.

Leading in the OpenLLM leaderboard across multiple languages including English, German, Spanish, French, Italian, Dutch, and Portuguese, our model achieves top scores when ranked against larger sized models such as Google’s Gemma 2.

We've also introduced a multi-stage infinite Learning Rate Scheduler that enables us to adjust the model's learning speed during training, optimizing our sessions and enhancing overall performance.

Read the report here: https://arxiv.org/abs/2402.17834

BryanLegend··on Claude 3 model family
Sorry, I failed to get the joke. Am I a robot?
BryanLegend··on Twenty years is nothing
I use SVN for game dev and love it. It just works.
BryanLegend··on Varda Capsule Reentry – Five Minutes from LEO to Earth [video]
From Slide 7: "Radiation dominates convection at ~11.5km/s for 1m radius • Radiation dominates convection at ~10km/s for 5m radius"
BryanLegend··on Varda Capsule Reentry – Five Minutes from LEO to Earth [video]
The gasses get so hot they give off a lot of black body radiation. Heat shield is mostly beat up with infrared.

When the gases decompress they'll be a lot cooler, just like your AC.

BryanLegend··on Varda Capsule Reentry – Five Minutes from LEO to Earth [video]
That's what a several miles per second wind looks like!

The heat is not from the friction, but from the compression of the gasses.

BryanLegend··on SpaceX discloses cause of Starship anomalies as it clears an FAA hurdle
Falcon 9 reached orbit on it's first attempt, so it didn't have failed experimental flights unless you count Falcon 1 as being it's experiments.
BryanLegend··on Mistral Large
There's a network effect in that they are used more so they've generated more feedback from users, which is then used to improve GPT.
BryanLegend··on It's OK to abandon your side-project
Is it okay to abandon my 500th side project?
BryanLegend··on Chip Defense
There's some at https://f-droid.org/packages/de.chadenas.cpudefense/
BryanLegend··on Understanding, using, and finetuning Gemma
I was pleased to see the architectural differences highlighted. It's insightful to see how they're evolving.
BryanLegend··on Stable Diffusion 3
From George Hotz on Twitter (https://twitter.com/realGeorgeHotz/status/176060391883954211...)

"It's not the models they want to align, it's you."

BryanLegend··on Gemma: New Open Models
Andrej Karpathy's take from twitter. (https://twitter.com/karpathy/status/1760350892317098371)

Seeing as I published my Tokenizer video yesterday, I thought it could be fun to take a deepdive into the Gemma tokenizer.

First, the Gemma technical report [pdf]: https://storage.googleapis.com/deepmind-media/gemma/gemma-re... says: "We use a subset of the SentencePiece tokenizer (Kudo and Richardson, 2018) of Gemini for com- patibility. It splits digits, does not remove extra whitespace, and relies on byte-level encodings for unknown tokens, following the techniques used for both (Chowdhery et al., 2022) and (Gemini Team, 2023). The vocabulary size is 256k tokens."

The tokenizer.model file is with this code release: https://github.com/google/gemma_pytorch/blob/main/tokenizer/...

I decoded this model protobuf in Python and here is the diff with the Llama 2 tokenizer: https://diffchecker.com/TRnbKRMH/

Notes: - vocab size is quite large: 32K -> 256K - add_dummy_prefix is False. Different from Llama but consistent with GPT. This is a bit more consistent w.r.t. "leave the data alone", as there is no preprocessing step that adds a space to the encoding text. - the model_prefix is the path of the training dataset, which is amusing to look at: "/cns/mf-d/home/gemini-data-access/tokenizers/final_v1_51GB_run1/bpe_coverage_0_999995_v5/255969". Seems to indicate the tokenizer training corpus was ~51GB (?). - a lot of user_defined symbols (i.e. special tokens) are present, e.g. "hardcoding" a sequence of up to 31 newlines as tokens, and a large number of other unclear tokens. I tried decoding the octal representations but it's not clear what's happening here. Also a lot of more special tokens for what look like html elements, e.g. <table>, <tr>, <td>, <i>, <b>, etc. Not 100% sure what the unused tokens are for, maybe this is pre-allocated space to make easier future finetunes that try to add more special tokens, as there is no need to resize vocabularies and perform model surgeries (?).

TLDR this is basically the Llama 2 tokenizer, except bigger (32K -> 256K), with a lot more special tokens, and the only functional departure is that add_dummy_prefix is turned off to False. So e.g. tokenizing:

"hello world" becomes: [17534, 2134] ['hello', 'world']

which otherwise would have been preprocessed to " hello world" (note leading space) and tokenized as: [25612, 2134] ['hello', 'world']

cool

BryanLegend··on Nuclear SMR welding breakthrough
Might have be a foot thick wedge that was filled one bead weld at a time.
BryanLegend··on Groq runs Mixtral 8x7B-32k with 500 T/s
How well would your hardware work for image/video generation?
BryanLegend··on Firefly III: A free and open source personal finance manager
I use HomeBank and have been happy with it. https://www.gethomebank.org/
BryanLegend··on Miguel de Icaza shadowbanned from X for posting about Gaza
Browsing thru his feed, it does seem pretty negative.

Search probably just ranks in part by a sentiment analysis (positivity) score and there's probably a minimum cutoff.

BryanLegend··on Acoustic cameras can see sound (2023) [video]
The language acquisition was explained in part by the alien having a photographic memory.

I thought the perfect energy absorption trait of the microbes was well thought out. Honestly something I could see being invented someday.

BryanLegend··on Acoustic cameras can see sound (2023) [video]
I love how everything in Project Hail Mary by Andy Weir is very feasible, including this. So much Sci-Fi is just magic.

I recently read the Dune book and was disappointed at how much of the "science" was just "because magic!"

BryanLegend··on Take the Road Most Documented
And it would have been more documented.
BryanLegend··on Disney unveils the HoloTile floor
John Carmacks take:

I am skeptical of something like this making an impact for consumer VR, but it should be possible to integrate the sensor input at the OpenXR level, allowing it to work with all apps without needing per-app specialization.

However, it probably doesn’t “solve” motion sickness, because the vestibular system still won’t think you are going forward. The bouncing around motion of walking does have a masking effect that will help some.

Source: https://twitter.com/ID_AA_Carmack/status/1750557236798148613

BryanLegend··on ChatQA: Building GPT-4 Level Conversational QA Models
ChatQA can outperform GPT-4 on a wide range of conversational QA tasks: - ChatQA and GPT-4 take the same top-5 chunks from our best retriever, when long documents are involved. - ChatQA performs very well on tabular data, arithmetic calculation, and “unanswerable” cases!

Source: Wei Ping https://twitter.com/_weiping/status/1748185517509030140

BryanLegend··on Let's make the indie web easier
Try https://getpublii.com/

Host on Netlify for free. Zero server headaches.

BryanLegend··on Let's make the indie web easier
Try https://getpublii.com/
BryanLegend··on How a script doctor found his own voice
https://archive.ph/WjlR8
BryanLegend··on What We Watched: A Netflix engagement report
These numbers were for Jan-Jun of this year.
BryanLegend··on NASA says SpaceX’s next Starship flight could test refueling tech
It costs six weeks of time, which is the only thing Elon cares about.
← PreviousPage 3 of 5Next →