altarius

15 ms·

61.
by altarius 6y ago
If I ran the numbers right, only about 15% of the energy consumed in the US is produced in the form of electricity (4,127 billion kWh vs 100.2 quadrillion Btu consumed, 1kWh ~ 3400 Btu). So going 100% renewable or nuclear for electricity pr
62.
by altarius 6y ago
So first, the headline seems to be based on "primary energy supply" - I assume that includes transportation, vehicles, heating and so on. Even if Germany went 100% renewable/nuclear for electricity they'd still be at ~60
63.
by altarius 6y ago
How do we know these are perfectly functioning devices? The average person wouldn't read studies and documentation or ascertain the quality - I barely can and check HN comments for many medical studies :) FDA approval is a very strong
64.
by altarius 6y ago
I'm sure they have smart people, but they're not that exceptional imo. Otherwise mid-way through they'd have surely realized the impossibility of the situation, notified the city that the original objectives are unattainable
65.
by altarius 6y ago
Carbon fiber frames are now quite common in mountain biking and road biking, many enthusiasts (just quite average riders) buy them. I think this bike for wealthy commuters and city dwellers, could replace public transit or Uber rides. Peopl
66.
by altarius 6y ago
I am pretty sure that Adobe products make heavy use SIMD/SSE/AVX extensions to speed up any image processing that is not offloaded to the GPU - I wonder how well Rosetta 2 translates the vectorized instructions. If not well, then
67.
by altarius 6y ago
Bad as in "unrealistic", i.e. lacking details and textures? Probably because they're researchers not 3D game designers. My guess is that it is just showing a standardized raytracing scene from a public research dataset used t
68.
by altarius 6y ago
> They are stuck evolving a 30 year-old architecture. ARM is older than you may think :) AFAIR the ARM instruction set was developed just a couple years after the Intel 8086, 1983 vs 1978. They're both nearing 40 years, but not that
69.
by altarius 6y ago
This article explains how to measure and correct mirrorless camera and lens bayonet mount tilt for very demanding landscape and astro photography.
70.
Cameras and Lenses Are Crooked and How to Adjust Them(cacaoeditions.com)
9 points by altarius 6y ago|1 comments
71.
by altarius 6y ago
Another interesting article where the author documents how to measure and adjust for camera lens-mount tilt on mirrorless cameras with a rotating lens adapter. https://cacaoeditions.com/your-cameras-and-lenses-are-crooke...
72.
by altarius 6y ago
That's an interesting idea. I just looked at the top 25 analysts, 23/25 are specialized in the tech sector - maybe something of a "rising tide lifts all boats" effect there at the top.
73.
by altarius 7y ago
No, not as far as I can tell. If I read this paper right, viruses on surfaces/aerosols decay exponentially (so no specific "life-time") and they determined the half-lives here. Start with more particles and you reach the dete
74.
by altarius 7y ago
I just want to stress this again! I see so many people claiming that you need to quarantine your packages for X days to be safe - this does not seem to be what the study says! That doesn't seem to be true unless the number of particles
75.
by altarius 7y ago
The only generally applicable information form the paper is the viral half-life in aerosols/on surfaces and comparing it to SARS-COV1. This won't help in determining how long to quarantine packages unless someone finds out what th
76.
by altarius 11y ago
Linked lists aren't fast in general but there are workloads on which they outperform vectors -- which is why it is important to understand the advantages and disadvantages of each data structure. Most lower-level memory allocators e.g.
77.
by altarius 11y ago
Even whole program analyzing compilers can't necessarily outperform a well-tuned regular compiler, see e.g. MLTon vs OCaml in this (micro-) benchmark. The OCaml compiler is just well-written and well-tuned and performs surprisingly wel
78.
by altarius 12y ago
I'm not a ruby guy but the implementation is quite interesting. The syntax looks very readable compared to other library-level implementations. There seems to have been some abuse of the "::" constant access operator and a lo
79.
by altarius 12y ago
... and maybe San Francisco.