Recent content by John d Marano
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J
The Short Story Thread: Post Yours Here
I haven't been on the forum in years. Let me know if this is the right thread to post a short story. Here's the teaser short story opening :The lector clears her throat, “let us begin with a prayer”. Savoring the moment, she scans the crowd of postulants with her eyes. “In the name of the...- John d Marano
- Post #9
- Forum: Sci-Fi Writing and World Building
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J
Undergrad Are Aliens Listening? Evidence for Intelligent Life in Space
If there is intelligent life out there they're ignoring us. For the same reason the USA has never invaded has never invaded South Sudan there's just nothing there the USA wants. Its hard to admit humans are not wanted but its true. What would aliens want from us To dig up and burn our...- John d Marano
- Post #23
- Forum: Astronomy and Astrophysics
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What does the American educational system (K-12) teach well?
I had some lousy teachers but many of the good ones taught me to question authority . . .- John d Marano
- Post #145
- Forum: STEM Educators and Teaching
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J
Solar Energy Conversion at Night
You're right, I was thinking of converting the light to electricity and then transmitting the energy on a different point of the spectrum with a better divergence (than regular light) and then use a series of booster satellites to pass along the energy but that doesn't add up. It makes more...- John d Marano
- Post #22
- Forum: Aerospace Engineering
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J
Solar Energy Conversion at Night
I was thinking of putting a solar sail facing the sun (constructed of a flimsy material so that undesirable parts of the spectrum can pass through) and have the desirable light concentrate on a concave mirror (hopefully it won't heat up too much because it's reflecting only part of the...- John d Marano
- Post #19
- Forum: Aerospace Engineering
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J
Solar Energy Conversion at Night
Besides access to light 24/7 I was thinking the same thing. However the closer you get to the sun the more intense the rays 1/5 into the sun from Earth the rays are 25 times more intense. So if you have mirrors closer to the sun to direct the light towards a satellite in Earth orbit you could...- John d Marano
- Post #17
- Forum: Aerospace Engineering
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Solar Energy Conversion at Night
Humans do not do well in polar regions https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3793275/ a little light in the winter might help- John d Marano
- Post #14
- Forum: Aerospace Engineering
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Solar Energy Conversion at Night
Znamya_2.5 failed http://news.bbc.co.uk/2/hi/science/nature/273220.stm "The total force exerted on an 800 by 800 meter solar sail, for example, is about 5 Newtons (1.1 lbf) at Earth's distance from the Sun,[2] making it a low-thrust propulsion system, similar to spacecraft propelled by...- John d Marano
- Post #12
- Forum: Aerospace Engineering
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J
Solar Energy Conversion at Night
I was thinking that too, It might be why Znamya_2.5 https://en.wikipedia.org/wiki/Znamya_(satellite)#Znamya_2.5 failed . Anyway I was thinking that some orbital PV could power a electromagnetic drive https://www.nasaspaceflight.com/2015/04/evaluating-nasas-futuristic-em-drive/ to constantly...- John d Marano
- Post #10
- Forum: Aerospace Engineering
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J
Solar Energy Conversion at Night
I got distracted by this "The Case for Space Solar Power" Kindle Edition https://www.amazon.com/dp/B00HNZ0Z96/?tag=pfamazon01-20 and this https://www.nasa.gov/pdf/716070main_Mankins_2011_PhI_SPS_Alpha.pdf Anyway 1400 seemed high, so full moon light produces 1.1 eV per sqr meter and Znamya 3...- John d Marano
- Post #7
- Forum: Aerospace Engineering
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J
Solar Energy Conversion at Night
1. $340 million to build and operate Znamya 3 http://motherboard.vice.com/read/the-man-who-turned-night-into-day 2. Which produced a light on the Earth "35 miles to 55 miles across" http://www.nytimes.com/1993/01/12/s...e-mirror-as-giant-night-light-for-earth.html? 3. So with electrical...- John d Marano
- Post #5
- Forum: Aerospace Engineering
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Solar Energy Conversion at Night
It's hard to say, Little Help? There this NYTs article http://www.nytimes.com/1993/01/12/science/russians-to-test-space-mirror-as-giant-night-light-for-earth.html? which calculates satellites in terms of multiple of moon light equivalents and I found this...- John d Marano
- Post #3
- Forum: Aerospace Engineering
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J
Solar Energy Conversion at Night
This is a fun thought experiment; Why not have space based mirrors to reflect light down to Earth at night to make solar do a little extra generating! The cost of solar is coming down and the cost of lifting things into orbit is coming down, so why not. Plus gold is very reflective, light...- John d Marano
- Thread
- Energy Energy conversion Solar Solar energy Space
- Replies: 24
- Forum: Aerospace Engineering
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J
Coal Exhaust Making a Solar Updraft Tower Work
I was thinking of ways of making carbon cleaner for the environment. One of the ways I came up with is filling a solar updraft tower https://en.wikipedia.org/wiki/Solar_updraft_tower with the exhaust from a gas/coal plant. So you'd get a true greenhouse gas accumulation of heat going in the...- John d Marano
- Thread
- Coal Exhaust Solar Tower Work
- Replies: 2
- Forum: Materials and Chemical Engineering
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J
Courses Is There any Coding Bootcamp Worth it?
I do like the idea of helping a charity. Thnaks- John d Marano
- Post #5
- Forum: STEM Academic Advising