jpm_sd

71 ms·

931.
by jpm_sd 10y ago
It's a desperate attempt to make X look good. There haven't been too many successful "graduations".
932.
by jpm_sd 10y ago
They specifically mention "hybrid-electric propulsion systems", which means electric propulsion powered from a fuel-burning generator.
933.
by jpm_sd 10y ago
The structural penalties for making "most of the weight of the aircraft" removable will probably lead to a plane that doesn't fly.
934.
by jpm_sd 10y ago
That's called a "bomber".
935.
by jpm_sd 10y ago
I'm 6'3" and completely screwed up my lower back from rowing. In 2013 I had got to the point where I could not sit down at a computer for more than 10 minutes. After four years of swimming 3-4x/wk, my back is now totally
936.
by jpm_sd 10y ago
Good idea. Our Qeng Ho descendants will thank us. [0] [0] https://en.wikipedia.org/wiki/A_Deepness_in_the_Sky#Interste...
937.
by jpm_sd 10y ago
The energy density (Watt*hours per kg) is about half compared to the "explosive" cells on the market.
938.
by jpm_sd 10y ago
Honestly, it doesn't matter to most of us right now. Goodenough's original breakthrough didn't hit the mass market for 20 years. Turning breakthroughs into /products/ is still really, really hard.
939.
by jpm_sd 10y ago
I guess I just haven't needed those bells and whistles. 32 bit timers are kinda huge. And some of the peripherals on the STM are suffering from "newer ain't always better" - the CAN and I2C controllers are more complicat
940.
by jpm_sd 10y ago
I switched from STM32 to the Kinetis family two years ago and I've been super happy with the change. The free IDE is actually pretty solid and support has been adequate. Now that Freescale has been doubly gobbled up (first by NXP and t
941.
Google balloon mistaken for UFO as it crashes in Colombia(bbc.com)
2 points by jpm_sd 10y ago|0 comments
942.
by jpm_sd 10y ago
There are two huge downsides to LTA flight: leaks, and drag. Leaking lift gas is expensive & difficult to prevent. Also explodey! (if H2). Airships have to have enormous volumes to float. Therefore they have a lot of drag compared to th
943.
by jpm_sd 10y ago
It must be really weird to work for Instacart. The shoppers spend the entire day in the supermarket, shopping for other people, waiting in the checkout line over and over again. The drivers are just sitting around in the grocery store parki
944.
by jpm_sd 10y ago
In my experience (have worked at 3 start-ups), if you quit, you probably don't expect the options to ever be worth anything!
945.
by jpm_sd 10y ago
Unfortunately there is no practical application for them. They're incredibly capable, but they're also expensive, fragile, and difficult to maintain. This is, in a nutshell, why Google decided not to hold on to the company - no co
946.
by jpm_sd 10y ago
This is ridiculous. Data centers contain thousands of racks like the single rack shown in the demo "pod" and they all require hands-on human maintenance from time to time. This becomes quite a bit harder when your server rack is i
947.
by jpm_sd 10y ago
Having worked in the robot-assisted surgery field, I can tell you that Mako (Abovitz's previous "success") was similarly hyped and was acquired for an enormous sum despite the facts that (1) surgeons hate using it and (2) pat
948.
by jpm_sd 10y ago
It's effectively a reversible vasectomy, side effects have been proven to be minimal for decades.
949.
by jpm_sd 10y ago
Plenty of people working on this: [0] https://matterport.com/ [1] https://structure.io/ [2] https://www.paracosm.io/
950.
by jpm_sd 10y ago
That would be pretty exciting! Maybe they'll acquire Blu Homes [1], or Acre Designs [2]. [1] https://www.bluhomes.com/ [2] http://www.acredesigns.com/
951.
by jpm_sd 10y ago
LEO day/night cycles are less than 2 hours, typically. An order of magnitude shorter, in other words. Satellites don't really have to expend any energy to stay "up", and thermal regulation is much easier in a vacuum than
952.
by jpm_sd 10y ago
As an ex-Xer, I can tell you that the PowerPoint presentation wasn't even that good.
953.
by jpm_sd 10y ago
Nope. Sorry. Physics. Compared to a lightweight device that fits in your pocket, an IBM PC is huge. Colossal. All the space you could possibly need for modular interconnects, sheet metal sub-chassis-es, proper fasteners, etc. etc. A compara
954.
by jpm_sd 10y ago
I'm intrigued, can you list any successful members of this generation of products inspired by Pebble? I think in some ways this should be a wake up call for Kickstarter, Pebble was their biggest success story until now.
955.
by jpm_sd 10y ago
FPGA in your desktop is a solved problem! http://www.alteraboards.com/products/ http://www.nallatech.com/solutions/fpga-cards/
956.
by jpm_sd 10y ago
I will sing its praises to the high heavens for one thing alone: seamless use of command-line git!
957.
by jpm_sd 10y ago
I have high hopes for this movie, but I don't enjoy Ted Chiang's writing. It is too clever, the dialog is terrible, and there is an underlying smugness - as if the writer is laughing about his poor, dumb characters and their ignor
958.
by jpm_sd 10y ago
I'm currently reading The Confusion [0] and just got through Leibniz's explanation of monadology [1][2]. Summarized very very briefly, the idea is that every particle in the universe is a sort of computational device, and their ac
959.
by jpm_sd 10y ago
A postmortem on nanomsg begs to differ: http://sealedabstract.com/rants/nanomsg-postmortem-and-other...
960.
by jpm_sd 10y ago
I have a W550S that is the best laptop I've ever owned... and I think I've had at least 15 laptops, two of which were Macs

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