mcroydon · HackerTrans

This came up yesterday[1] but if you'd like to know more, Kathy Kleiman's "Proving Ground: The Untold Story of the Six Women Who Programmed the World's First Modern Computer" includes the point of view of Jean Bartik along with the other ENIAC programmers. https://www.hachettebookgroup.com/titles/kathy-kleiman/provi...

[1] https://news.ycombinator.com/item?id=40317375

mcroydon

2 anni fadiscuss

I highly recommend "Proving Ground: The Untold Story of the Six Women Who Programmed the World's First Modern Computer" for more context about how the ENIAC came together. It includes the point of view of the programmers of the ENIAC who are often left out of or diminished in other accounts.

https://www.hachettebookgroup.com/titles/kathy-kleiman/provi...

mcroydon

9 anni fadiscuss

The Heltec WiFi LoRa 32 (http://www.heltec.cn/project/wifi-lora-32/) and clones are a solid place to start if you want to investigate LoRa. Pycom (https://pycom.io) has several chips including one that does both LoRa and Sigfox.

Espressif also have a shorter distance but lower power option that uses WiFi tech called ESP-Now that is worth looking at: http://espressif.com/en/products/software/esp-now/overview

mcroydon

9 anni fadiscuss

The original paper (https://arxiv.org/abs/1604.01357) from 2016 goes in to more detail.

mcroydon

9 anni fadiscuss

I'm still a little confused why the story posted the other day fell off the front page so quickly, there was some good discussion and a link to a youtube meta-review that gave a pretty interesting view in to the last few days of the company:

https://news.ycombinator.com/item?id=15095861

mcroydon

11 anni fadiscuss

Not to be self-serving, but I've always been fascinated by Therac-25. I ended up doing a deep dive a few months back and put together a short 5ish minute podcast episode about it:

http://tinycast.in/2015/01/27/therac-25/

I used this PDF as one of the primary resources and it was a fascinating read.

mcroydon

15 anni fadiscuss

Good call. The dataset was large enough that it didn't feel silly to use something like MapReduce but the same thought has been in the back of my head the whole time.

mcroydon

15 anni fadiscuss

Thanks for the tip, I didn't think to copy the data to ephemeral storage like that. That'll probably speed things up a lot.

I ended up splitting the data in to a relatively small number (~200) of ~30MB gzipped files in order to initially saturate the mappers and speed things up. If that's not necessary after moving to ephemeral storage that's fine by me!

mcroydon

15 anni fadiscuss

With 8 instances and the number of files the input was split in to there were definitely both map and reduce tasks waiting for a runner. I don't know exactly how much but I'm pretty sure I'm paying a pretty heavy IO tax by using S3.

mcroydon

16 anni fadiscuss

http://geopastebin.com/about/ might be helpful. It's designed for sharing pastes of text-based geographic formats such as GeoJSON, WKT, etc.

mcroydon

16 anni fadiscuss

Another +1 on this fantastic book. It's extremely accessible and concise while covering quite a lot of ground on the subject.

mcroydon

17 anni fadiscuss

If only there were some good non-GPL machine learning libraries for Python...

mcroydon

18 anni fadiscuss

The biggest thing I got from PCI was a basic discussion of a lot of algorithms that I was able to research further on my own. I had no idea that I wanted to know more about K-means clustering until I read the book.

If that's all you get out of it great, but there's a lot of interesting stuff in there, covered in enough detail to get you started, which is more than enough to make me happy.

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