jclarkcom

7 ms·

31.
I have recordings proving Coinbase knew about breach months before disclosure(jonathanclark.com)
685 points by jclarkcom 11mo ago|223 comments
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by jclarkcom 11mo ago
In January 2025, I was targeted by scammers who knew my exact Bitcoin balance, SSN, DL, and other private Coinbase account details. I immediately reported this to Coinbase's Head of Trust & Safety with recordings and technical evid
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by jclarkcom 11mo ago
Thanks for the encouragement. I do plan to make more of them open source, in the past it's been a bit of burden to document, test, and fix bugs before publishing but for some projects AI can do that for you now. One project I did publi
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by jclarkcom 11mo ago
I have a node middleman that proxies request from an HTML/JS front end to a native cuda process using web sockets. To support multiple windows, the node process process provides communication between two browser windows. This lets me
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by jclarkcom 11mo ago
I've been enjoying the breadth of projects made possible with AI, I've cataloged over 200 of them created in 2025 here: https://jonathanclark.com/posts/ai-coding-million-lines-2025... A few of my recent favor
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by jclarkcom 1y ago
looks that way to me. However, that isn't necessarily a bad thing if a human reviewed and guided AI to get the article they want.
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by jclarkcom 1y ago
When humans are in the loop everything pretty much becomes stochastic as well. What matters more is the error rate and result correctness. I think this shifts the focus towards test cases, measurement, and outcome.
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by jclarkcom 1y ago
https://github.com/jclarkcom/assembler-io-benchmark
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by jclarkcom 1y ago
I implemented an assembler as part of VMware thinapp and this was big performance boost for me but maybe you have a different experience from your efforts?
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by jclarkcom 1y ago
I was trying to provide a more detailed explanation without typing a lot. I studied this problem a lot as PE at vmware.
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by jclarkcom 1y ago
More detailed explanation from ChatGPT. As quick estimate you could achieve a >2x speed up using memory mapped files for a typical assembler workload. https://chatgpt.com/share/68b5e0db-a6d0-8005-9101-d326d2af0a...
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by jclarkcom 1y ago
Windows uses memory mapped IO for loading all executable processes because it allows you to start executing a process after loading a few pages even if the exe is megabytes. You can use the same to reduce latency for starting to assemble
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by jclarkcom 1y ago
You might look into using memory mapped IO for reading input and writing your output files. This can save some memory allocations and file read and write times. I did this with a project where I got more than 10x speed up. For many cases
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by jclarkcom 1y ago
Very cool. We are launching a sensor that mounts on the inside of your window and measure the sky color for a small cone of the sky and transmits this to our skylight and window fixtures inside (see innerscene.com) so they can replicate ex
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by jclarkcom 2y ago
For broadband IR, using a gas IR heater will give you the cheapest output - followed by an electric heater. Hard to compete with devices design specifically for heating when you are trying to do fancy optics in a compact form factor at the
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by jclarkcom 2y ago
UL safety cortication and energy regulations make it difficult to add UV and IR, UV because it can easily damage people's eyes and IR because it introduces too much heat which can be a fire or touch/burn risk. Energy regulations
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by jclarkcom 2y ago
Yes, there is some really interesting research on this topic. It turns out that if blue light centered around 490nm is an order of magnitude more effective at treating SAD. https://www.innerscene.com/papers/lux-vs-wave
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by jclarkcom 2y ago
how does this compare with heat dissipated per square cm when you compare with desktop CPUs?
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by jclarkcom 2y ago
Yes! We started out building light field displays and originally used digital displays (arrays of micro LCD screens) - the result was super awesome but had a long road to becoming becoming a commercially viable product so pivoted to anal
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by jclarkcom 2y ago
Thanks for the feedback! We’ll see if we can improve that image.
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by jclarkcom 2y ago
Thanks. This is our own custom PDF viewer. I made the page by generating images from a PDF and then overlaying transparent text so you can search and copy/paste. This allows us to make the PDF much more interactive (I.e. help topics,
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by jclarkcom 2y ago
its tricky to compare because ours are designed to be integrated into a space and create the appearance of window with a big focus on high CCTs (2200k-40,000k) which relocates the color and spectrum of a blue sky using up to 180W. This la
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by jclarkcom 2y ago
Ah! :) :)
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by jclarkcom 2y ago
Yes! We just announced and demoed a sensor that does just this at LEDucation last week and will be shipping before the end be of the year. It’s called SkySync
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by jclarkcom 2y ago
I don’t understand, is this a general jab at Oracle or was there something specific to this topic?
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by jclarkcom 2y ago
Outside direct sunlight can be 100,000 lux. With one fixture if you are standing in the sunbeam you are more likely to be at 2000 lux which is a long way off. You can add more fixtures to increase the light you are getting. However it tur
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by jclarkcom 2y ago
Yes, the more LEDs you mix the closer you can get to your target SPD but more LEDs also add cost and may not fit mechanically depending on how you are mixing them. One other variable is energy efficiency, there are a lot energy codes around
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by jclarkcom 2y ago
You might want to test for mold as well
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by jclarkcom 2y ago
there are companies that can do custom phosphor formulations for you to target a specific output. The minimum order quantities don’t make it practical for DIY but not too bad for a small startup. Our approach is to mix a bunch of differe
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by jclarkcom 2y ago
Yes! Good eye. They installed a pretty early version of our product - I think it took 4-5 years for the episode to finally come out

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