apcragg

6 ms·

31.
by apcragg 5y ago
Sure, but it will help some. There is no silver bullet for solving our water resource problems. It is going to take a massive patchwork of partial solutions to even approach something resembling a solution. Balking at small changes is a sur
32.
by apcragg 5y ago
Given how many of them receive absurdly subsidized water from the Bureau of Reclamation, I'm going to say no. Take Arizona, where the already subsidized (though not nearly as much as some BOR water projects) cost is ~$200 per Acre-foot
33.
by apcragg 5y ago
Desalination plants are vastly more expensive than current water conservation solutions. Solving a problem with tech is sexy, especially on HN, but simple programs like canal lining and drip irrigation are much cost effective for now. It&#x
34.
by apcragg 5y ago
I'm pretty sure that it uses digitally controlled analog shifters. This is distinct from baseband IQ digital beamforming.
35.
by apcragg 5y ago
Phased arrays are everywhere. An incredibly common example are many cellular base station antennas. They are fancy but nothing particularly special these days. Active phased arrays, e.g. steerable with either analog phase / delay shift
36.
by apcragg 5y ago
What regulations, specifically, do you mean?
37.
Defending Speech We Hate(aclu.org)
77 points by apcragg 5y ago|69 comments
38.
by apcragg 5y ago
As a practicing EE / RF comms engineer, I will say that it is very obvious when you're working with someone who thinks that their EE coursework wasn't useful for the real world.
39.
by apcragg 5y ago
I would suggest adding Communication Systems by John Proakis. It is the seminal text for digital comms and should be included, given the plan's foray into SDRs.
40.
by apcragg 6y ago
It's not pure profit because, a) you can only oversubscribe 20GB/s so much without data caps and speed limits b) a small fraction of the constellation will be over inhabited land and wealthy enough countries at any moment c) I am
41.
by apcragg 6y ago
I don't have any insider info but there is absolutely no chance that the dish is costing them even <2x what they are charging for it. I don't really see how their business model pencils out even assuming massive oversubscriptio
42.
by apcragg 6y ago
Going to guess GNURadio based on calling it a Python script executor that outputs xml. If that's true, I'd that it really starts to break down when the desired logic breaks from the "apply sequential steps to a stream of cont
43.
by apcragg 6y ago
You're confusing energy and power which is leading you to the wrong conclusion. 6KW is 6KW of power. Over 10 minutes it's 1KWh of energy but typically you only care about instantaneous heat dissipation, which is power.
44.
by apcragg 6y ago
Failing budget? I get that it's super popular right-wing talking point but it just hasn't been true for years. Prior to COVID (which has decimated state budgets Red and Blue) California had a huge surplus and massive rainy-day fu
45.
by apcragg 6y ago
Diet isn't just types of food consumed but also the amount. Also fat isn't 'unhealthy' but that's a different misconception.
46.
by apcragg 6y ago
Most of them https://assets.publishing.service.gov.uk/government/uploads/...
47.
by apcragg 6y ago
This seems like a purposely obtuse hit on California by someone with a political axe to grind. Before the pandemic and global recession which has blown up State and Federal budgets everywhere, California was running a huge budget surplus an
48.
by apcragg 6y ago
True, but people aren't exactly consuming tomatoes for their caloric content in a way they would for say, nuts or grains.
49.
by apcragg 6y ago
https://www.latimes.com/science/story/2020-03-22/coronavirus... He seems to be a perfect example of the axiom that deep knowledge in one field doesn't necessarily give you expertise in others. Seems like
50.
by apcragg 6y ago
You're right. It's trite, but given design flexibility, low power, or cost you only get to pick two.
51.
by apcragg 6y ago
Sure but they are more expensive. You need a rock solid controller with beefy and redundant electronics to make sure you're never going to be connected to the grid when you shouldn't be.
52.
by apcragg 6y ago
There is a reason everyone uses Ettus Radios (USRP). You will quickly pay back the extra cost though saved engineering time over by not buying cheap hobbyist hardware.
53.
by apcragg 6y ago
It's not so much that the high performance radios are proprietary as it is that building one of these systems is expensive and requires lots of domain specific knowledge. You could somewhat easily build one of these systems for ~$250k
54.
by apcragg 6y ago
Well, for one you're not going to get a very wide coverage range or throughput with the ~1 watt of power you're limited to in the ISM bands. Your router will also have to accept interference from 802.11 routers, Bluetooth, etc de
55.
by apcragg 6y ago
It's a myth that Houston doesn't have zoning. They don't have use based zoning but they still have plenty of requirements such as parking minimums and lot sizes that serve as de facto zoning.
56.
by apcragg 6y ago
You're right, it's not great for actual products. I was talking more about prototyping and debugging. It's super nice to be able to just do a "cat /sys/bus/iio/.../.../out_voltage1" or
57.
by apcragg 6y ago
Those deadzones are horrible. Also, the calibration routine is absolutely broken. For example, when userspace requests a certain TX gain, the chip does some calibration black box magic to determine the best way to distribute that gain acros
58.
by apcragg 6y ago
Even with Lime Microsystems, their chip barely functions compared to the equivalent ADI part. Sure, it's nameplate specs are nice but it the dynamic range is crap and the EVM barely passes the LTE spec. Even worse is that basically the
59.
by apcragg 6y ago
In this case, the relationship of "master" and "slave" is intrinsically linked. No one is telling you to stop using "master" in other contexts. It is the master-slave relationship here that is the issue. You ar
60.
by apcragg 6y ago
I mean if you want to conflate social norms with debates about knowledge and practice, sure great zinger you have there. Unfortunately, many people do not have the luxury of treating their race, sexuality, gender, religion, etc, as a matter

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