maliker

33 ms·

331.
by maliker 8y ago
I'm not the original asker, but I've got a graph dataset generated/manipulated with python with about 1 million points and lines, and I just can't find a good interactive web visualization for it. D3, Leaflet, about 15 o
332.
by maliker 8y ago
Flow batteries are looking pretty good. Costs are coming down, and the very high (some say unlimited) cycle life could give an advantage over Li-ion for stationary applications. On the other hand, used Li-ion from electric vehicles could be
333.
by maliker 8y ago
I've seen utility installations done like this. More expensive but safer.
334.
by maliker 8y ago
The utility flywheel installations I'm aware of are underground. More cost, but safer.
335.
by maliker 9y ago
I tend to keep a folder full of short text files and pictures for my notes. If the documents are each small, its pretty easy to scan through them using preview functionality in the file browser (Finder.app in my case). And the simple format
336.
by maliker 9y ago
For the current generation mix, which is a lot of natural gas and some renewables, you’re right. And I agree the mix will get greener.
337.
by maliker 9y ago
More energy efficient, yes. But resulting more CO2 and SOx and NOx emissions even with scrubbers.
338.
by maliker 9y ago
Swapping does solve the charging time problem. There was a pretty big effort to build out a swapping network, but it ran in to business issues: https://en.wikipedia.org/wiki/Better_Place_(company)
339.
by maliker 9y ago
You're right, the article makes a simplistic and greedy-sounding point. A better way to put it would be: electric vehicles are a good way to shift the roughly 30% of our energy consumption that is transportation from fossil fuels to re
340.
by maliker 9y ago
I know this isn’t what you’re referring to, but DOE is pushing for a reorg that creates a large cybersecurity department.
341.
by maliker 9y ago
You make a good point about new engineering skills needed for cyber. There are also institutional issues. Software talent tends to be in the IT department, and power systems talent is in the operations and planning department, so issues lik
342.
by maliker 9y ago
Can’t forget the potential load from those kitty hawk autonomous electric helicopter/planes. https://mobile.nytimes.com/2018/03/12/business/dealbook/flyi...
343.
by maliker 9y ago
A lot of the charging will happen at homes at night, so until energy storage doesn’t add 200% to the cost to take a solar install to solar + storage, the utilities are still going to be the power providers. There are also going to be (hopef
344.
by maliker 9y ago
Dang, got here too late to make the Vonnegut joke. But still in time to share a link about strange forms of non-ice H2O: https://en.wikipedia.org/wiki/Polywater
345.
by maliker 9y ago
International disagreements in power supply, loop flows on HVDC lines, incentives for distributed generation that trigger huge distribution build outs that bankrupt utilities, nuclear shutdowns that make it hard to meet carbon goals—its an
346.
by maliker 9y ago
Probably my favorite anecdote about the grid synchronization behavior is that the generator governor settings (e.g. how to react to changes in frequency) were developed early in the 100 year+ history of the grid, and now we don’t fully unde
347.
by maliker 9y ago
Yep, as others have pointed out, grid operators can see waves of frequency change propogate through the system. Here’s some visualizations of that (see the linked movies) from a cool project called FNET/GridEye: http://fnetp
348.
by maliker 9y ago
Could the Weissman score be higher than middle-out methods?
349.
by maliker 9y ago
There is a pretty cool startup going after the smart bathroom idea: https://www.youtube.com/watch?v=DJklHwoYgBQ
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by maliker 9y ago
I think the magic of Mathematica is the combination of (1) a huge collection of well-maintained CAS and math functions (2) great graphics and animation support (3) the notebook interface (which jupyter is catching up on fast) and (4) some o
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by maliker 9y ago
Github issues hit the sweet spot for us between trello and Jira. Although then we got 6 projects all related to one code base and switched to a homegrown system. Our main win was making sure each engineer worked on the fewest number of proj
352.
by maliker 9y ago
You might like matplotlib for visualization. It's a Python clone of Matlab's plotting tools. And it's compatible with numpy if you need to do linear algebra or operate on big datasets.
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by maliker 9y ago
I bet 10 bucks that this gets written in to a Silicon Valley episode this season.
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by maliker 9y ago
I agree that window placement would be a killer feature. Organizing windows by location speeds things up a lot for me. There have been some neat 'ZUI' approaches to this. Like the Raskin app ( https://www.youtube.com&#x2
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by maliker 9y ago
I do a poor mans version of this all the time by keeping all files for a project in a folder. .url files for links, copies of emails, .sh scripts for terminals, aliases to other folders and files, etc. But this looks like a more polished ap
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Show HN: OcrThisImage.app, optical character recognition macOS app(github.com)
6 points by maliker 9y ago|0 comments
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by maliker 9y ago
Or the tunneling machines are for building habitats on Mars. Well, it's a fun hypothesis at least. Anything that could improve traffic in major cities gets my vote of approval regardless of what other applications it has.
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by maliker 9y ago
Pretty much all the screenshots are of text - a professor's website, a github repo, etc. It would be interesting to see how submitters, if this new one is the only interface, optimize the images that show up in the screenshot. I confes
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by maliker 9y ago
Pretty cool that the motion sensors on mobile will let you tip the teapot.
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by maliker 10y ago
Text files stored in Google Drive. Editing with Sublime Text on MacOS, Textastic/Workflow on iOS. Searching via Launchbar and Spotlight.

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