andruby (u/andruby) - Readit News

andruby commented on CO2 batteries that store grid energy take off globally spectrum.ieee.org/co2-bat... · Posted by u/rbanffy

zahlman · 5 days ago

I understand this, but it coincidentally uses CO2 and it's hard for me to understand why the technology would sound "too good to be true" without imagining such a purpose.

andruby · 5 days ago

It's a one-time "use" though, it's not consuming CO2, so it's not going to move any needle

andruby commented on Deliberate Internet Shutdowns schneier.com/blog/archive... · Posted by u/WaitWaitWha

tonyedgecombe · 5 days ago

They think it makes them sound knowledgable.

andruby · 5 days ago

I don't think that is necessarily the case. If you use certain words all the time, shortening them makes sense. They might just forget which abbreviations are and aren't common knowledge. You wouldn't get mad if people use PC, CPU, ATM and RAM, right? Even SSD would be fine on HN, but it probably wouldn't be fine outside HN. (neither would using "HN")

andruby commented on Prompt caching for cheaper LLM tokens ngrok.com/blog/prompt-cac... · Posted by u/samwho

holbrad · 8 days ago

I gave the table of inputs and outputs to both Gemini 3.0 flash and GPT 5.2 instant and they were stumped.

https://t3.chat/share/j2tnfwwful https://t3.chat/share/k1xhgisrw1

andruby · 8 days ago

What is the function supposed to be? It’s not Celsius to Farenheit. (2C=35F, 206C=406F, …)

andruby commented on Analysis finds anytime electricity from solar available as battery costs plummet pv-magazine-usa.com/2025/... · Posted by u/Matrixik

Nextgrid · 13 days ago

Problem with Lithium ones is that they tend to be quite flammable. Lead acid is mostly inert I believe?

andruby · 13 days ago

LFP is a lot safer than NMC. I think it's almost on par with Lead-Acid.

andruby commented on In New York City, congestion pricing leads to marked drop in pollution e360.yale.edu/digest/new-... · Posted by u/Brajeshwar

saalweachter · 17 days ago

Fuel is sold by volume and fuel type; diesel is about 25% more expensive per gallon than regular gasoline where I am.

andruby · 17 days ago

And it is 10% cheaper than gasoline where I am (South-Africa)

andruby commented on IBM CEO says there is 'no way' spending on AI data centers will pay off businessinsider.com/ibm-c... · Posted by u/nabla9

Archelaos · 24 days ago

Gartner estimates that worldwide AI spending will total 1.5 Trillion US$ in 2025.[1] As of 2024, global GDP per year is 111.25 Trillion US$.[2] The question is how much this can be increased by AI. This describes the market volumn for AI. Todays investments have a certain lifespan, until they become obsolet. For custom software I would estiamte that it is 6-8 years. AI investments should be somewhere in this range.

Taking all this into consideration, the investment volumn does not look oversized to me -- unless one is quite pessimistic about the impact of AI on global GDP.

[1] https://www.gartner.com/en/newsroom/press-releases/2025-09-1...

[2] https://data.worldbank.org/indicator/NY.GDP.MKTP.CD

andruby · 24 days ago

To increase the GDP you also need people to spend money. With the general population earning relatively less, I'm not sure the GDP increase will be that substantial.

It's all going to cause more inflation and associated reduction in purchasing power due to stale wages.

andruby commented on DIY NAS: 2026 Edition blog.briancmoses.com/2025... · Posted by u/sashk

mzhaase · a month ago

I would like to point people to the Odroid H4 series of boards. N97 or N355, 2*2.5GbE, 4*SATA, 2 W in idle. Also has extension boards to turn it into a router for example.

The developer hardkernel also publishes all relevant info such as board schematics.

andruby · a month ago

I've had an H3 for a few years and it runs amazing. Very low power usage, small footprint and great stability. I run it with an M.2 ssd for power considerations.

Before that I had a full size NAS with an efficient Fujitsi motherboard, pico-psu, 12V adaptor and spinning HDD's. That required so much extra work for so little power efficiency gains vs the Odroid.

andruby commented on DIY NAS: 2026 Edition blog.briancmoses.com/2025... · Posted by u/sashk

andruby · a month ago

Looking at the Power Consumption section:

How can the total average Wattage be lower than any of the lines it consists of?

Total average power is 66.49W, yet average _Idle_ power is noted as 66.67W.

andruby commented on The Lucas-Lehmer Prime Number Test scientificamerican.com/ar... · Posted by u/beardyw

GMoromisato · a month ago

Are there any numbers that don't look prime but are, in fact, prime? [Other than 2, I suppose.]

andruby · a month ago

11, 13, 17 and 19 used to trip me up. And maybe 67

andruby commented on AMD GPUs Go Brrr hazyresearch.stanford.edu... · Posted by u/vinhnx

amelius · a month ago

I personally prefer the hardware companies making just hardware.

Keeps the incentives pure.

I'm even willing to accept a 20% performance hit for this requirement, should someone bring that up.

andruby · a month ago

Unfortunately hardware can’t exist anymore without software. Everything non-trivial needs firmware or microcode.

And depending on others to write firmware for your hardware, I don’t think that’s a recipe for success.