davrosthedalek

7 ms·

91.
by davrosthedalek 1y ago
True, but there are many more people that speak no English, or so badly that an article would be hard to understand. I face this problem now with the classes I teach. It's an electronics lab for physics majors. They have to write repo
92.
by davrosthedalek 1y ago
Additionally, the total amount of solar and wind is limited. Surely more than we need now, don't get me wrong, but how much more? Factor 2? 10? I could see a future that is extremely energy hungry, and not just because of AI.
93.
by davrosthedalek 1y ago
The sun is very close to a black body radiator, so all wavelength. The atmosphere and water filters a lot. It is actually quite strange that plants are green -- that's the wavelength the atmosphere lets through particularly well, so wo
94.
by davrosthedalek 1y ago
Not having the data readily available slows it down. Having more random and less well targeted actions hit the supporters, so weakens the support. Is that enough? No. But I still lock my door, even if this will only slow down a determined t
95.
by davrosthedalek 1y ago
True, but there is a large fraction of people who are not like this, but haven't given the dangers of data collection enough thought. You can reach those. Are that enough people? Let's hope so. I really fear for our older generati
96.
by davrosthedalek 1y ago
That what doesn't exist for the license plate dataset? I am sure there are good reasons for having that dataset. For most data collection, there are good reasons. My argument is that just because we decided that "police with camer
97.
by davrosthedalek 1y ago
The point with the firecracker/bomb is this: Not just because it's the same type of tool means that it has the same cost/benefit analysis. The dangers of, say, firecrackers in the had of the general public, scale dramatically
98.
by davrosthedalek 1y ago
And then tell them the story about the Jewish people in the Netherlands.... Alternatively, ask them how accurately an email need to describe their medical history before they believe it's real and fall for a scam.
99.
by davrosthedalek 1y ago
To be fair, I never heard about the Canadian-US war before I moved to the States. But we went over the Nazi regime multiple times in school [I am German].
100.
by davrosthedalek 1y ago
Isn't an atomic bomb just a scaled up version of a firecracker? Nobody denies that collection of datasets can have upsides. But the downsides are often not seen/evaluated accurately. And negative effects don't necessarily sca
101.
by davrosthedalek 1y ago
At the same time, we do not allow people to have nuclear bombs. As everything in life, it's a trade-off, but a good trade-off can only be found if people are fully aware of the consequences. It seems to me, people regularly underestima
102.
by davrosthedalek 1y ago
Go out, tell your non-techie friends how data can be misused.
103.
by davrosthedalek 1y ago
What can I say, it's hard to give up data. So I guess the situation must escalate until the bad outcome was undeniable. And I don't want to make a point here about current political affairs. My point is that data collection has se
104.
by davrosthedalek 1y ago
If you defund police, what do you think will be cut first? The control organs and oversight, or the thing they should oversee?
105.
by davrosthedalek 1y ago
It's a lesson people haven't learned in 80 years. https://en.wikipedia.org/wiki/1943_Amsterdam_civil_registry_... For any dataset you collect, think about how it can be miss-used. Because in all likelihood i
106.
by davrosthedalek 1y ago
No worries, the stuff in the wife's bottle is the same, just more expensive.
107.
by davrosthedalek 1y ago
You totally can, but the target quantity is average current, not average voltage. Since the LED is a diode, that's not the same.
108.
by davrosthedalek 1y ago
Conceptually, that's not far away from PWM + filter, except maybe for the closed loop.
109.
by davrosthedalek 1y ago
The unit of a gain/attenuation is [1]. There is no implicit unit in that case.
110.
by davrosthedalek 1y ago
Exactly, and that's why a voltage gain of factor 10 is 20dB, because it's a power gain of factor 100.
111.
by davrosthedalek 1y ago
Yes, and I think it just depends where how you read the square. For cm^2, we mean that we square a centimeter, not that we have a centi of a meter^2. But a hectare is really a hect of ares, so 100 ares. Here the square "is baked in&quo
112.
by davrosthedalek 1y ago
I believe the point is that in "centimeters squared" you also square the cm. So it's 1/100 of a meter, then squared. While the mega in megapixels applies to the area. So presumably there are two length multiplied to be a
113.
by davrosthedalek 1y ago
it's (cm)^2, not c(m^2). If there would be the one-dimensional equivalent to pixels, say pix, then 1pixel = 1pix^2, and then 1 megapixel = (kpix)^2
114.
by davrosthedalek 1y ago
Well, dB is fully specified in that regard. It's always power. You can calculate the voltage gain from it under certain assumptions, and under normal assumptions you get that factor 2. But a -20dB attenuator will always reduce the powe
115.
by davrosthedalek 1y ago
That is of course not true. dB without reference is perfectly fine to use for gain and attenuation. dBm or any of the variants would be flat out wrong.
116.
by davrosthedalek 1y ago
But dB without reference makes sense in many many occasions. Either because the reference is implicit (not ideal, but we have many implicit assumptions in communication), or because it's genuinely a ratio. Attenuation, gain. If you eve
117.
by davrosthedalek 1y ago
That doesn't make sense. -50dB to -44dB and -6dB to 0dB is the same change in power, as a factor. If human hearing is logarithmic, the same factor produces the same increase in loudness.
118.
by davrosthedalek 1y ago
If 0 dB is its maximum, then -50dB is 50 dB down in power from its maximum (so 10^-5). No m V or other post-fix needed.
119.
by davrosthedalek 1y ago
Any reasonable spec sheet would not say that. I say reasonable, because in the audio world, people pay extra money for oxygen-free copper cables.
120.
by davrosthedalek 1y ago
In every communication, the sender assumes that the other party has some knowledge. For example, I assume that you can read my badly worded English text. There is rarely confusion with the people in the fields that use dB a lot. That othe

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