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gpuhacker

230 karma · joined December 2, 2017

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gpuhacker··on Zoomable lens without any moving parts
A glacier is compacted snow, not ice
gpuhacker··on Ask HN: Recommended books and papers on distributed systems?
Maarten is one of the best teachers, if not the best teacher I ever had. I was lucky enough to have him as my teacher for three major courses in my curriculum: Computer Networks, Operating Systems, and Distributed Systems.
gpuhacker··on How Academia Resembles a Drug Gang (2013)
The data of people taking longer to reach professorship should have included the average age of retirement of professors over the same period, which I would expect to also have shifted during this interval (and roughly by the same amount, as I know it did in the Netherlands). It explains why there are relatively fewer open positions for people to transition into, simply because the current cohort of professors isn't retiring. Not as fancy as a comparison to drug dealers, unfortunately.
gpuhacker··on Old TV caused village broadband outages for 18 months
I love these kind of stories. At Astron, the institute that builds and operates radio telescopes in the Netherlands, there's a story that they once gave a new TV to someone who lived a couple of villages from one of the telescopes, because the old set was causing too much radio interference. They could figure out the exact location of the old TV based on the data from the radio telescope
gpuhacker··on Fungus at Chernobyl absorbs nuclear radiation via radiosynthesis
For a nonvideo source of info on this:

https://www.biorxiv.org/content/10.1101/2020.07.16.205534v1

gpuhacker··on The Battle of Helm’s Deep, Part V: Ladders Are Chaos
It's a really old game by now, but I still sometimes play Medieval Total War 2. The siege battles are a lot of fun but perhaps a bit too easy. I hope the game gets a sequel someday.
gpuhacker··on Stoke – A stochastic superoptimizer and program synthesizer
Isn't that exactly what neural networks are used for these days?
gpuhacker··on Why Programming Is a Good Medium for Expressing Poorly Understood Ideas (1967)
My PhD supervisor used to say: "one week of programming easily saves an hour of thinking"
gpuhacker··on Amsterdam’s canal houses have endured for 300 years
Thanks for sharing! Very interesting I wonder where the index would be now since we have experienced another surge in house prices over the last 5 years in the Netherlands and in particular in Amsterdam.
gpuhacker··on Reasons to turn down the transmit power of your Wi-Fi (2017)
More a tragedy of the commons.

https://en.m.wikipedia.org/wiki/Tragedy_of_the_commons

gpuhacker··on Teachers unknowingly shot with plastic pellets during active shooter drills
I'm from Europe. I mostly clicked on the link to find out what a shooter drill is. I'm baffled by the article and the comments in this thread. Having to have drills for school shootings is apparently considered a normal part of life in the US.
gpuhacker··on Show HN: We Got Sick of Giving Out 'Ballpark Estimates' So We Built This
If you do a search on the second sentence: "It's how all your friendly apps talk to each other." You'll find at least 10 other cost calculator websites that all use that exact sentence to explain the term API. It also shows how flooded the web is with sites like this.
gpuhacker··on Thousands of scientists run up against Elsevier’s paywall
These publishers require that you transfer copyright to them. You're allowed to use your own work as part of your work, such as teaching, and sharing it with fellow researchers. But you're not allowed to upload the published version of the work elsewhere. Preprints are often allowed, such as on arxiv, are usually allowed.
gpuhacker··on Neutrino tomography of Earth
Exactly
gpuhacker··on Neutrino tomography of Earth
An in space detector is (at least to my understanding) not that easy, as you need the surface of the Earth to interact with the neutrinos. These interactions result in muons, which allow to detect that there was a neutrino in the first place. Also, there is a pretty big source for neutrinos pretty close to Earth, but Earth is in its orbit, as opposed to the other way around.
gpuhacker··on Neutrino tomography of Earth
You may like KM3NeT then (http://www.km3net.org/). The goal is to build a cubic kilometer spanning instrument at the bottom of the Mediterranean.
gpuhacker··on An Introduction to GPU Programming in Julia
Sure! I meant this one: https://developer.download.nvidia.com/assets/cuda/files/redu...
gpuhacker··on An Introduction to GPU Programming in Julia
It's true that the programming model allows that, but underneath all threads within the warp will execute the same instructions. However if there is a branch, some threads can be predicated so their instructions have no effect. This is called warp divergence and can become a performance issue. If possible branch only on threadidx using multiples of the warp size. There's a cool slide deck on implementing a parallel sum algorithm that explains this really well.
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