samcheng

64 ms·

481.
by samcheng 9y ago
The article, and the comments here, are missing an important fact that really helps clarify how these compressed-air energy storage systems work: These systems use the compressed air as input into a natural gas turbine. You can think of th
482.
by samcheng 9y ago
RINSE | San Francisco, CA, Culver City, CA, Washington, DC, Boston, MA | Full Time Rinse is a technology-enabled dry cleaning and laundry delivery service. We've grown at double-digit month-over-month rates for about four years now, ou
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by samcheng 9y ago
Silicon Valley, on the other hand, just 45 minutes south of SF, has a great climate. It's remarkable what a few mountains between city and ocean can do.
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by samcheng 9y ago
It's still pretty interesting; you can eyeball those other percentages. The "Most projects are still on Django 1.8" insight is still a good one. Not sure how this short article could have rocketed to the very top of the fron
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by samcheng 9y ago
RINSE | San Francisco, CA, Culver City, CA, Washington, DC | Full Time Rinse is a technology-enabled dry cleaning and laundry delivery service. We've grown at double-digit month-over-month rates for about four years now, our business f
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by samcheng 9y ago
I wish them the best of luck, but it definitely looks like PhoneGap is losing to React Native. At least, everyone I know who wants to build a mobile app but doesn't want to invest heavily in Android and iOS expertise is building a Rea
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by samcheng 9y ago
If a censor can't tell which specific parts of wikipedia someone is trying to access, then they will be more likely to simply block the entire site. HTTPS encrypts the URL and the content, but does not mask the DNS lookup nor the serve
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by samcheng 9y ago
There's a LOT of space, vertical and horizontal, in the Bay Area. Land near the tech giants goes for upwards of $300 per square foot - and is filled with 60-year-old single-story tract housing.
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by samcheng 9y ago
Another interesting remote-sensing analysis would be to look at NDVI ( https://en.wikipedia.org/wiki/Normalized_Difference_Vegetati... ) - there was already a terrible drought leading up to the conflict, but this war mus
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by samcheng 9y ago
This particular Sheriff's Department hasn't lost an officer in the line of duty since 1998 (and that's a good thing): https://www.odmp.org/agency/3457-san-mateo-county-sheriffs-o... San Mateo county&#x27
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by samcheng 9y ago
I encourage Americans to think about this militarization at their next Fourth of July Parade. Watching the Sheriff's Department marching, in formation, dressed in black, with ARs, behind an MRAP, is, well, disquieting. With whom are th
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by samcheng 9y ago
It's possible to roll your own ngrok clone via SSH tunnels, a publicly-available server somewhere, and autossh. This is basically ssh-tunnel-as-a-service.
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by samcheng 9y ago
The article is about a major tipping point in the industry. There probably won't be a single winner - all of the major auto manufacturers already offer, or are developing, EVs. Drivers are expected to choose those electric models in
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by samcheng 9y ago
Anyone who doubts this should go test drive a Tesla. Smooth, controllable, quiet, but surprisingly-strong acceleration, coupled with the fact that you never have to go to the gas station, make an EV with >200 miles of range a better driv
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by samcheng 9y ago
RINSE | San Francisco, CA, Culver City, CA, Washington, DC, Boston, MA | Full Time Rinse is a technology-enabled dry cleaning and laundry delivery service. We've grown at double-digit month-over-month rates for about four years now, ou
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by samcheng 9y ago
There are a few businesses that buy (unsorted, bulk) legos and then sell sets or sorted bulk legos. Here's a fun one in Taipei: http://www.brickfinder.net/2017/03/22/taiwan-lego-store-visi... (They also
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by samcheng 10y ago
Because a wind turbine is limited to the area of the swept blades, and larger turbines can reach the faster winds that occur higher off the ground, large turbines are MUCH more effective than small ones. Turbine blades that are twice as lo
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by samcheng 10y ago
Do you drive 200 miles a day? I don't. You rarely need to charge an electric car from empty. I agree that solar is significantly less attractive in high-latitude, cloudy locations, though. All of those panels that Germany installed
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by samcheng 10y ago
Wind power is frequently curtailed. All commercial/utility scale wind turbines can control blade pitch, and all but the smallest residential-scale wind power have braking systems to prevent runaways. Controlling blade pitch is also i
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by samcheng 10y ago
RINSE | San Francisco, CA, Culver City, CA, and Washington, DC | Full Time Rinse is a technology-enabled dry cleaning and laundry delivery service. We've grown at double-digit month-over-month rates for about four years now, our busine
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by samcheng 10y ago
There was also a meta-moderation system that worked to enforce fairness. The system was great! You could set a filter, and most of the trolls would disappear (and there were a LOT of trolls).
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by samcheng 10y ago
Makes sense to me. Every bit of "Uber self-driving car" press is going to mention that nasty Waymo lawsuit. At this point, Uber has got to be looking to stop the bleeding.
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by samcheng 10y ago
There is literally a chapter titled "No Silver Bullet."
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by samcheng 10y ago
I live in Palo Alto and commute to San Francisco three days a week. It's a little over an hour, bike<->train<->bike, each way. It's actually quite pleasant; I tether the phone to the laptop. In extenuating circumsta
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by samcheng 10y ago
You're right; many of these facilities go so far as to install backup Diesel generation on-site. There are plenty of opportunities for demand-shaving, though. The simplest one is to simply reduce the HVAC load by adjusting the thermos
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by samcheng 10y ago
There are other mechanisms that can also help ameliorate the challenges of intermittent ("non-dispatchable") power generation: - Long-range (generally, DC) power transmission lines. China is investing heavily here. - Similarly, i
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by samcheng 10y ago
You must not live in San Francisco. Bike 'chop shops' operate in the open, disassembling stolen bikes outside the many tents that line the streets in the Mission district. Here's a good article on the problem: http:/&
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by samcheng 10y ago
It's probably the 1.4 MB jpeg flag image for Pakistan. Those little ripples/folds in the flag... EDIT: Yeah, all of those flags are ridiculously high-resolution. Pretty rough on the browser.
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by samcheng 10y ago
I believe best practice is to sort out which of your CSS is needed to render above-the-fold content, separate that out into a smaller file, and serve that higher in the page or even inline it. The rest of the CSS can be served at the bottom
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by samcheng 10y ago
This page had an ugly flicker as the page loaded, with the unstyled left-side navigation displayed before the CSS rules were loaded. It's not a huge deal, and honestly I have built some sites like that as well, but when you're pit

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