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ms512

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rowzero.io 1y ago

Row Zero raises $10M to accelerate product development

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www.economist.com 1y ago

A new electricity supercycle is under way

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electrek.co 1y ago

Rivian (RIVN) clashes with Bosch in new legal battle over EV motors

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aws.amazon.com 1y ago

Now available: Graviton4-powered memory-optimized Amazon EC2 X8g instances

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www.amazon.science 1y ago

Five ways Amazon is helping modernize the U.S. power grid

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electrek.co 2y ago

All Teslas in the US get a one month trial of FSD starting this week

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arstechnica.com 2y ago

Blue Origin has emerged as the likely buyer for United Launch Alliance

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ir.aboutamazon.com 3y ago

Amazon.com Announces First Quarter Results

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www.cnbc.com 3y ago

Google’s cloud business turns profitable for the first time on record

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wikibon.com 3y ago

QLC Flash HAMRs HDD

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www.tomshardware.com 3y ago

HDD Sales Crater, Drop 35% Year-over-Year

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brooker.co.za 3y ago

Erasure Coding versus Tail Latency

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www.washingtonpost.com 3y ago

Amazon starts widespread layoffs in corporate ranks

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news.ycombinator.com 3y ago

Ask HN: High Quality Investigative Journalism Sources?

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www.washingtonpost.com 3y ago

Disgraced crypto founder says he’s not on the run. But no one knows where he is

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ir.aboutamazon.com 3y ago

Amazon.com Announces Second Quarter Results

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tesla-cdn.thron.com 4y ago

Tesla 2021 Q3 Update [pdf]

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ir.tesla.com 6y ago

Tesla Q1 2020 Vehicle Production and Deliveries

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covid19.healthdata.org 6y ago

Covid-19 Projections

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ir.tesla.com 6y ago

Tesla Announces Offering of Common Stock

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www.vox.com 6y ago

How to delete what Facebook knows about your life outside of Facebook

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qz.com 6y ago

Merger that paved the way for the Boeing 737 Max crisis

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ir.aboutamazon.com 7y ago

Q1 2019 Amazon.com, INC. Earnings Release

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www.space.com 7y ago

SpaceX Aces First-Ever Rocket Landing in California After Satellite Launch

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www.theverge.com 7y ago

SpaceX’s powerful new Falcon 9 rockets pulled off its second mission tonight

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www.washingtonpost.com 8y ago

Antarctic ice loss has tripled in a decade

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aws.amazon.com 8y ago

Now Open AWS EU (Paris) Region

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www.washingtonpost.com 9y ago

Here’s your first official glimpse of Tesla’s finished Model 3

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aws.amazon.com 10y ago

AWS Asia Pacific (Mumbai) Region

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245pts88

When you don't have a need for a cryptographic digest, it's important to think of the channel's bit error distribution in selecting a checksum algorithm.

Different checksum algorithms can provide better error detection for specific channel error models (potentially even with fewer bits). Non-cryptographic checksums are typically designed for various failure models like a burst of corrupt bits, trading off what they do/don't detect to better match detection of corruption in the data they will protect.

For example, if you know that there will be at most one bit flip in your message, a single bit checksum (parity check) is sufficient to identify that an error occurred, regardless of your message size. (Note that this is an illustrative example only, since, typically, messages have a certain number of errors for a certain number of message bits -- the expected number of errors depends on the size of the message.)

I used them extensively when I worked on Radar contact tracking. They are an effective tool when used with a good understanding of the limitations.

Logic Lab 3 years ago

The Navy Electricity and Electronics Training Series (NEETS) are a good high level overview that can help you learn which areas you want to explore further. Specifically to the questions you asked, module 1 will give you the overview on basic circuits.

[1] https://archive.org/details/neetsmodules_202003/

Rechargeable battery wear can be separated out into (1) cycle aging and (2) calendar aging.

One of those typically dominates the total battery degradation, depending on the use case. EVs for personal use tend to have calendar aging dominate the overall battery degradation early in their life.

The book referenced in the original comment (Command and Control: Nuclear Weapons, the Damascus Accident, and the Illusion of Safety) specifically digs in to the limitations behind the safety mechanisms.

Specific to the incident here, only 1 of 4 safety mechanisms prevented an catastrophic incident. The details in the wikipedia page [1] about this incident is well worth a read.

[1] https://en.wikipedia.org/wiki/1961_Goldsboro_B-52_crash

Some more context here is that Reed Solomon and Shamir's Secret Sharing both take some data and produce N pieces (commonly called shards or horocruxes), any K of which can reconstruct the original data (K <= N).

The difference is that Shamir's makes it so that having up to K-1 pieces reveals _no_ information about the original data. You may be able to infer certain data from less than K shards in Reed Solomon.