Activity for James McLellanâ€
| Type | On... | Excerpt | Status | Date |
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| Edit | Post #292668 | Initial revision | — | 3 months ago |
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A: Arctic polar vortex collapse The polar vortex nearly dies every year around springtime in the hemisphere you are concerned with. This failure is what brings those spring frosts in February, March. It's not really possible to break the vortex by adjusting mean tenperature. What creates the vortex in the first place is tempe... (more) |
— | 3 months ago |
| Edit | Post #292666 | Initial revision | — | 3 months ago |
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Observations About A Literary Framework for Thinking About Genetics I was researching genomes and observed some similarities with literature that I think might better help communicate the topic. Wanted to share them: There exists an Alphabet (A, C, G, T and sometimes U). These aren't the most primitive structure, but complex molecules about a dozen atoms long P... (more) |
— | 3 months ago |
| Comment | Post #292121 |
Yes sir. At least, easier than extra universes. (more) |
— | 5 months ago |
| Edit | Post #292166 |
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— | 5 months ago |
| Edit | Post #292166 | Initial revision | — | 5 months ago |
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A: Large-Scale Biosphere on Mars: Interior Weather Any volume is large enough for rain or fog. Humidity buildup (rain) is a concern in spacecraft design, and was one of the reasons (too much rain) that caused one proposed Martian settlement to fail, according to simulations. You shouldn't need to worry about weather - if you have enough water. ... (more) |
— | 5 months ago |
| Edit | Post #292121 | Initial revision | — | 5 months ago |
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A: Where is the inside of the Tardis? Is it a world in itself? Is it part of a different world? I think I've answered here https://scientific-speculation.codidact.com/posts/292119 . I'll re-post for easy access. Setup I realized that it's possible to design a specific box that's bigger on the inside. Wanted to write this down. Relating Mass to Lorentz Contraction As velocity approa... (more) |
— | 5 months ago |
| Edit | Post #292118 |
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| Edit | Post #292118 | Initial revision | — | 5 months ago |
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Ansible Design (FTL Communication) Modulation of BBO-Entangled Light Assuming this Video of Entanglement in Action is not incorrectly hiding some additional filter operation, it seems (from the video) that you can quite obviously modulate an entangled pair of photons so that a Receiver gets a clear and measurable on/off signal. ... (more) |
— | 5 months ago |
| Edit | Post #288134 | Initial revision | — | over 1 year ago |
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What are the Names of the Earth-Sun L4 and L5 Regions? The Earth-Moon Lagrange points have names: L1, L2, and L3 are Libration Points, the L4 and L5 points are the Kordylewski Clouds. The Jupiter-Sun L4 is named the Greeks, and the Jupiter-Sun L5 is named the Trojans. What are the names of the Earth-Sun L4 and L5? (more) |
— | over 1 year ago |
| Edit | Post #288133 | Initial revision | — | over 1 year ago |
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Does 5th Gas Giant Have a Name? I recently learned that it's believed that the solar system once had one more gas giant, which was ejected by Jupiter some time in the past. https://thesolarsystem.fandom.com/wiki/FifthGiant Does anyone know if this hypothetical planet has a name? (more) |
— | over 1 year ago |
| Edit | Post #287511 |
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— | about 2 years ago |
| Edit | Post #287511 | Initial revision | — | about 2 years ago |
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What are Some House Games for Free Fall? Living in space can be boring. What are some good home games for people living and working in free fall? I thought of a few - - Bocce : in this variant the size of the jack and the player balls is swapped. The jack is large, massive, and magnetic. Play begins by letting the jack free float in s... (more) |
— | about 2 years ago |
| Edit | Post #287510 |
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— | about 2 years ago |
| Edit | Post #287510 | Initial revision | — | about 2 years ago |
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A: How can a Type II civilization influence accretion rates from a debris disk to a passing star? Kepler's Laws give us the velocity of everything in the debris field and comet cloud-- At any radius, $i$, the velocity of the circular orbits (and a good rough definition of a "belt", although this is excluding highly elliptical objects) -- $ v{b,i} = \sqrt{{{GM{b}} \over {R{b,i}}}} $ Where $v... (more) |
— | about 2 years ago |
| Edit | Post #287495 |
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— | about 2 years ago |
| Comment | Post #287495 |
Both. But this question is for low gravity. I'll fix the text. Thank you! (more) |
— | about 2 years ago |
| Edit | Post #287497 | Initial revision | — | about 2 years ago |
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Considerations for Recreational Solar Sailing? I was investigating a few ideas on recreational solar sailing, and came up with some interesting things - The primary equation in solar sailing is $ F = {{2 R S A} \over {c}} \sin^2{\theta} $ Where - R is the fraction of incident light - S is the solar flux being received (Watts per meter ... (more) |
— | about 2 years ago |
| Comment | Post #287486 |
You may be right. I thought the OP was asking about cutting out the conversion to steam and driving a turbine.
As just a plasma current, at some point you'd want to transform / rectify / clean the power... wouldn't you? (more) |
— | about 2 years ago |
| Edit | Post #287495 | Initial revision | — | about 2 years ago |
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How Could Golf Change in a Low-Gravity Environment? Low gravity golf was invented by Alan Shepard in 1971 when he hit two golf balls 40 yards on the moon. Surprisingly, this version of the sport with little atmosphere and much lower gravity, is the most common that will be played on the planets in the solar system that are already top candidates fo... (more) |
— | about 2 years ago |
| Edit | Post #287486 |
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— | about 2 years ago |
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— | about 2 years ago |
| Edit | Post #287486 | Initial revision | — | about 2 years ago |
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A: Electricity from nuclear decay According to this site, the kinetic energy of the two alpha particles emitted is 4.273 MeV. As you said, these aren't neutral atoms yet with balancing electrons. So, they are a charged plasma. Imagining, instead of a shielded lump, that you had your sample crushed fine on a dish, (so that the h... (more) |
— | about 2 years ago |
| Edit | Post #287485 | Initial revision | — | about 2 years ago |
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Is Scientific Speculation the Right Place for a Discussion Series About Space Sports? I feel like science fiction doesn't have many sports, other than the occasional laser battle or fantasy sword duel. I'd like to start a discussion series about sports in a low-gravity/no-gravity environment. Not necessarily a single question with a single answer. I started with a question about wr... (more) |
— | about 2 years ago |
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| Edit | Post #287455 | Initial revision | — | about 2 years ago |
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A: How would an interstellar spaceship's speedometer work if everything else is moving? I'd recommend a Kalman filter to increase measurement accuracy to the overlap of multiple system errors so that you get the best result. For inputs, may I recommend - - a calculation of doppler shift for known stars. You can do this realtime. Take a fast fourier transform of the incoming light ... (more) |
— | about 2 years ago |
| Edit | Post #287368 |
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— | about 2 years ago |
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— | about 2 years ago |
| Comment | Post #287395 |
I had thought about that. You might be able to hold the competition inside a room only a little bit larger than the occupants, and they leverage off an opposing wall to perform a pin. (more) |
— | about 2 years ago |