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pehrlich

pehrlich on Hacker News

Re:Ask HN: Could you share your personal blog here? on Tuesday July 04, 2023 @02:48PM (#36591035)
https://pehrlich.substack.com

Mostly discussing climate / energy / policy. Focus on having slightly more research than common

Re:Ask HN: Could you share your personal blog here? on Tuesday July 04, 2023 @02:47PM (#36591022)
https://pehrlich.substack.com/

Various climate / energy / policy topics. A focus towards slightly more in depth research than typically seen

Re:Designs for Battery Tankers to Transport Renewable Energy by 2026 on Thursday June 01, 2023 @08:27AM (#36150179)
It might help to have some context. I pulled up the NH Net Metering rules and see that they charge the following:

Transmission fees (FERC/federal fees): $12.92/625kWh = $0.02

Distribution fees (PUC/local fees): $25.88/625kWh = $0.04

Compared to this ship: 1000 miles: $41.5 / 1000kWh = $0.04

A full comparison would require knowing what distances NH moves power over, and what other transmission would need to be coupled with one payload from the ship. But I think that this shows the costs may be in the right ballpark. And - having this as an option where lines are not possible (NIMBYism, etc), or in the face of natural disasters, is a huge win.

Now.. is that ship electric?

Re:Ask HN: Looking for prior-HN article on battery design on Monday October 03, 2022 @09:10AM (#33066987)
ah thanks, but sadly that's not the one

Ask HN: Looking for prior-HN article on battery design

Posted by pehrlich on Sunday October 02, 2022 @03:02PM
from the ask-hn dept.

Hello!Last ditch effort here - a year ago or so there was posed a link to a page which had wonderful visual and text descriptions of different battery technologies and their tradeoffs. It illustrated 5-6 different dimensions which one might optimize for (e.g. charging speed, capacity, cost, lifetime, etc) on these little charts which looked a bit like spiders' webs.I thought that was a great...

( Read More... | 2 comments | on HN )
Re:Making the travel site people want, even if it’s impossible on Monday March 04, 2013 @10:04PM (#5322615)
"For a week or two" became "For a week"

Looking forward to using this. A lot. :-)

Re:SkiFree in the Browser on Wednesday February 20, 2013 @03:52AM (#5249532)
Damn, I'm itching for pressure-sensitive arrow keys.
Re:GTalk Syntax Highlighter 0.3 released. on Thursday February 14, 2013 @01:26PM (#5220990)
New in this release:

0.3.0 (accessories release) - Copy to clipboard, link to this plugin, in a lightly styled menu - Now supports gTalk with "Pictures in chat" labs extension turned off - Donate button, toggle switch, and fork banner on options page - Google analytics for click events - Sexy new icon.

Thanks :)

Re:Google Talk Syntax Highlighting on Wednesday January 30, 2013 @11:55AM (#5140361)
Yup, you can see right in the manifest file that it can only access mail.google.com: - https://github.com/pehrlich/GTalkSyntax/blob/master/manifest...

And view all the source code, right here: https://github.com/pehrlich/GTalkSyntax/blob/master/javascri... (This is the one file that does almost all the work)

I really would like to make it as safe and constrained as possible, but by nature this is working with personal data. I think the best thing I can do is to keep it all open source, think about privacy, and encourage people to read the code as much as possible.

Anyway, thanks for having a look!

Ask HN: Machine Learning Hacker Buddies

Posted by pehrlich on Thursday September 20, 2012 @11:36AM
from the ask-hn dept.

Hey,I'm a web developer with a tilt for robotics. (Often Lego). I love machine the concepts of learning -- Genetic Algorithms, Baysian Classification, and so on. I also love graph databases (such as neo4j), because they encourage a very free perspective on using big data; this I believe will be very useful for machine learning.I'm working on two projects right now: First a chrome extension...

( Read More... | no comments | 5 points | on HN )
Re:Prime number patterns on Tuesday July 17, 2012 @11:27AM (#4256088)
wow, that is very nice. Does anyone else think they notice that primes are near to highly divisible numbers?
Re:The Challenge of Making Friends as an Adult on Sunday July 15, 2012 @08:36PM (#4248749)
I read that as the "shared struggle and purpose" being the softball team..
Re:The Challenge of Making Friends as an Adult on Sunday July 15, 2012 @04:40PM (#4248027)
Where's summer camp for adults?
Re: Light-field photography on Wednesday May 16, 2012 @11:55PM (#3985324)
I was thinking that on top of video for a pretty awesome experience

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