Recent content by Eric Bretschneider

Respectfully, the OP's opinion reeks of #firstworldprivilege. The OP stated they would not live in some areas unless they were paid an exceptionally high salary. Some natural disasters come with a warning, and some do not. From the age of 5 to 12, I lived in rural Oklahoma. During that time...

Wildfires start as fires and spread. There is always an advanced warning, although I will agree the amount of warning varies. If you are in a traffic accident, you most likely had at most a second (or less) of warning and there was nothing you could do to avoid it. You have a better chance of...

You have days of warning for a hurricane. You have at least several minutes of warning for tornado. Wildfires you have plenty of warning about as well. I suspect you live a very insulated life if these are your concerns. Far more people are killed in auto accidents in Florida and Oklahoma...

I am amazed at the number of attempted answers - why? The question is flawed and can't be answered. As has been pointed out, candela are a measure of luminous intensity. More specifically, 1 candela = 1 lumen/ steradian. The OP did not specify the solid angle over which the light source has a...

The internet isn't something we really need. We managed as a species for quite some time without it, but you're using it here. lol While I understand your question, the problem is that few people these days understand the difference between "wants" and "needs". I've tried to teach my...

If you don't know what flux throughput is, there is little change you would understand an answer about flux throughput advantage. For any spectrograph (or any measurement), you have to be concerned about the ratio of the signal versus the noise. For a spectrograph, the signal is easy to...

I believe you may have meant that the parameters may have large standard deviations.

Apologies, but given the age of the research, quoting papers may not be the best approach. The critical work was done long before the information age and even before the digital age. The foundational work was completed when "computer" was a job description, not an electronic device. I will...

Our visual system evolved to operate under one illuminant (the sun), but that illuminant isn't static as perceived on the surface of the earth. The spectral power distribution changes markedly over the course of a day, even when the sky is clear. Cloudy weather complicate the scenario even...

What you are talking about is also known as the visual triangle: source, surface, detector. When you look at a source directly, you take one leg out. Color science does apply to sources viewed directly.

The "black-box processing" you are referring to is known as chromatic adaptation. It has been extensively studied in color science for over 50 years. Suffice it to say that the phenomenon is relatively well characterized. Color science is a rather understudied field. Most people working in...

It is important to keep in mind that our visual system attempts a sort of "white balance" - that is to say that our eyes adapt to the lighting conditions and attempt to render things with "normal" colors. The overall level of illumination is very important for this to happen. Daylight...

The layer of tears over the cornea is mostly water which is itself a strong absorber of far UV-C (i.e. 222 nm). Its not exactly a sacrificial layer, but it is readily replenished. There also isn't a lot of information on the effect of far UV-C light on surfaces and materials. It isn't exactly...

I am looking for more specific references on a realistic analysis before finishing the calculations I already started. You will note that I already calculated the minimum energy for operating the door based on helium at STP conditions. If there aren't specific references for a realistic...

Those references largely deal with information and entropy. I am asking specifically about the energy needed to open/close the door between compartments.