planteen

11 ms·

61.
by planteen 7y ago
I find that I can sometimes get significant speedups by changing data access patterns when considering cache. I have found this to be the first and most valuable thing to tune, before attempting SIMD.
62.
by planteen 7y ago
A wavelet naturally gives a spectrogram. The Fourier transform taken on a signal will give you only frequency content, but no idea in time where this frequency occurred. A wavelet naturally gives both time and frequency information. Of cour
63.
by planteen 7y ago
Could you refinance in say 5 years if rates were still negative then to get locked into 15 years of negative interest rates? Not sure on the mortgage market in Denmark, but in the US, refinancing mortgages common and is an industry of its o
64.
by planteen 7y ago
It doesn't mean the paper is worthless. On the contrary, the paper is more valuable than many other investment means. You are effectively paying a bank to guard your money with a negative rate, which makes sense. Guarding and protectin
65.
by planteen 7y ago
Those are all shaping (and bidi) issues though, independent from encoding. UCS-4 is a single Unicode code point and the simplest encoding. Shaping may combine code points many to one, one to many, have ordering issues, etc. I think it is im
66.
by planteen 7y ago
There's already a big "grid" in place in the western US: the Colorado River. A first pass solution could be to desalinate on the coast and then pump up to Lake Meade to meet all of California's use. Then upper basin stat
67.
by planteen 7y ago
No, you put a low pass filter on the other side of the DAC and it looks equally smooth. Those stair steps are high frequency. This is the filter is called the image rejection or reconstruction filter. Once you learn about the frequency doma
68.
by planteen 7y ago
You can also implement them both on a FPGA and take performance numbers that way.
69.
by planteen 7y ago
Maybe, but lightning only occurs in warm months. If you are going off grid anyway, wouldn't you want something that works year round like wind or solar?
70.
by planteen 7y ago
The first N capacitors will fail catastrophically, leaving the circuit open. Blown caps are a very common cause of failure in power circuits.
71.
by planteen 7y ago
How many capacitors have you seen rated for over 100 MV (megavolts)? I think a dielectric that can survive a field with that much tension is called unobtanium. Lightning is causing dielectric breakdown of the air (a great insulator already)
72.
by planteen 7y ago
Yeah, I honestly thought this was going to be an article about a discrete automatic gain control loop in FPGA logic using DACs/ADCs as actuators/sensors.
73.
by planteen 7y ago
At least on ARMv7, it's up to the MMU, not the CPU. I've worked with Cortex-A9s that trap the unaligned access. You can write a handler or crash.
74.
by planteen 7y ago
My strategy used to only play perfect blackjack strategy at the very rare $5 or more typically $10 table. But it's not even fun when people get pissy about when they think you "messed up the cards." I've tried to explain
75.
by planteen 7y ago
Totally agree. Using non-Latin characters would be a non- starter for most of the world.
76.
by planteen 7y ago
Yeah the San Luis Valley is full of center pivots. It's a very dry and cold place, but has an aquifer that gets reliably replenished by snow melt.
77.
by planteen 7y ago
I just tried to get Google Maps to route me over a difficult and dangerous 4WD road in Colorado and got it on my second try: https://goo.gl/maps/FWU1jANHAPA487D37 This takes you over Hayden Pass Rd. Here are some 4WD d
78.
by planteen 7y ago
Wow, how sad. We didn't have a video game console growing up, so I have very fond memories of Commander Keen. Does Chavez own the rights to Commander Keen 4 too?
79.
by planteen 7y ago
Came here to say this. I've worked on embedded Linux projects with a boot time requirement of 2 seconds and easily made it. I guess part of the difference is that you explicitly enumerate all hardware and drivers in a device tree on em
80.
by planteen 7y ago
My only thought about malloc() is that it was susceptible to fragmentation and applications needed to manage their own pools of similar sized blocks. But definitely an odd comment without further allocation.
81.
by planteen 7y ago
I've thought the same thing and then realized the impossibility of it. The reason being, in most western states, there are tens of thousands of patented mining claims. When a claim gets patented, it is private property, including both
82.
by planteen 7y ago
Another useful piece satellite imagery (other than farms and parking lots already mentioned) is watching shipping lanes in the ocean for traffic.
83.
by planteen 7y ago
The problem is size. The proposed constellations are possible because of small satellites. It's much easier to build a large telescope on the ground than it is in space. I don't see the small satellite revolution changing this.
84.
by planteen 7y ago
I ran some really long compute jobs on GCP (100% CPU for weeks across many vCPUs) with credits without getting flagged. I was evaluating FFTW performance for a project. Perhaps GCP could tell I was calling into FFTW and not mining so they d
85.
by planteen 7y ago
Using characters is confusing because I don't know if you mean before or after shaping. U+1C4 is unquestionably a single Unicode code point. I've heard people call this 1 logical character. Other people might say how many characte
86.
by planteen 7y ago
Even CubeSats today still use the SPARC (LEON) since it's easy to implement on a FPGA as a soft core. I'm personally not fan of SPARC though.
87.
by planteen 7y ago
You example is a little confusing from the use of the word "characters". I think glyphs would be more clear (U+1C4 is two glyphs). Though it might not actually be 2 glyphs, its dependent on how the font implements it. At the end o
88.
by planteen 7y ago
One key to know is that encoding (UTF-8, UTF-16, UTF-32) is a completely separate problem from rendering text. I have had a couple people say to me recently something along the lines of, "We don't need text shaping since UTF-8 tak
89.
by planteen 7y ago
I've seen the exact scenario mentioned in the article play out, "the moment you need to create something in a domain that does not fit existing tools, you are already into the domain where you will eventually need programming done
90.
by planteen 7y ago
Working with Japanese colleagues and customers, you calling everyone by their last name with the suffix "-san". In discussions even when the person is not present, Americans still say "Abe-san" since it is how you always

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