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originally posted by: D8Tee
a reply to: graysquirrel
I've wondered why this approach hasn't been taken.
Not sure why it hasn't been done, rotate the spacecraft to get some simulated gravity.
Abstract
Previous papers have examined the physical differences between natural and artificial gravity, through mathematical derivation and computer simulation. Taking those differences as given, this paper examines: the role of gravity in architectural design; the extensions of architectural theory necessary to accommodate the peculiarities of artificial gravity; and the appropriateness of space colony architecture as illustrated in the “Stanford Torus”, “Bernal Sphere”, and similar proposals. In terrestrial gravity, there are three principal directions – up, down, and horizontal – and three basic architectural elements – ceiling, floor, and wall. In artificial gravity, due to inertial effects of relative motion in a rotating environment, east and west (prograde and retrograde) emerge as gravitationally distinct. Thus, there are not only three, but at least five principal directions: up, down, east, west, and axial. The grammar of architecture for artificial gravity should accommodate this fact. To be meaningful, architecture should have formal properties that are similar to other aspects of the environment. The goal is not to fool people into thinking they’re still on Earth, but rather, to help them orient themselves to the realities of their rotating environment.
Copyright © 1995 by Theodore W. Hall. Published by the American Institute of Aeronautics and Astronautics, Inc., and the Space Studies Institute, with permission.
* Postdoctoral research fellow, Department of Architecture, Chinese University of Hong Kong. Research completed while doctoral candidate in architecture, College of Architecture and Urban Planning, University of Michigan.
originally posted by: Kashai
No particular speed. But unless you grab something on the hull you won't feel anything. You'll just hang there as the hull rotates around you.
Question, in this scenario, when I supposed to feel any g? At what donut's rotation speed?
No particular speed. But unless you grab something on the hull you won't feel anything. You'll just hang there as the hull rotates around you.
Nope. Unless you some how shed the velocity you acquire when you grab hull, angular momentum will keep you pressed against the hull. Inertia makes your body want to go in a straight line. Trouble is, there is a hull in the way.
Once your body matches the speed of what ever you grabbed, you find yourself in zero g again.
There is acceleration. Acceleration is a change in velocity. Velocity is a vector quantity composed of direction and magnitude (speed). Because your direction is constantly changing (because there is a hull in the way), you are constantly accelerating, even if the magnitude of your velocity is not.
To sustain some g value, the tube has to be in a state of continues acceleration.
Nope. Unless you some how shed the velocity you acquire when you grab hull, angular momentum will keep you pressed against the hull. Inertia makes your body want to go in a straight line. Trouble is, there is a hull in the way.
originally posted by: D8Tee
a reply to: Phage
You'd still get dizzy would you not?
I've been on the gravitron ride at the carnival, made me dizzy.
Other wise the floor would slip from under my feet coz I have inertia too, you know
Drop it, how?
Much better solution would be to drop a weight on tether from my space ship toward Earth.
How does an anchor make your ship go faster? But, since you don't understand angular momentum, I guess you can't be expected to understand orbital mechanics.
It will work as an anchor allowing my ship to go faster never leaving current orbit.
Abstract:
It has always been a desire of mankind to conquest Space. A major step in realizing this dream was the completion of the International Space Station (ISS). Living there for several months confirmed early observations of short-term spaceflights that a loss of gravity affects the health of astronauts. Space medicine tries to understand the mechanism of microgravity-induced health problems and to conceive potent countermeasures. There are four different aspects which make space medicine appealing: i) finding better strategies for adapting astronauts to weightlessness; ii) identification of microgravity-induced diseases (e.g. osteoporosis, muscle atrophy, cardiac problems and others); iii) defining new therapies to conquer these diseases which will benefit astronauts as well as people on Earth in the end; and iv) on top of that, unveiling the mechanisms of weightlessness-dependent molecular and cellular changes is a requirement for improving space medicine. In mammalian cells, microgravity induces apoptosis and alters the cytoskeleton and affects signal transduction pathways, cell differentiation, growth, proliferation, migration and adhesion.
This review focused on gravi-sensitive signal transduction elements and pathways as well as molecular mechanisms in human cells, aiming to understand the cellular changes in altered gravity. Moreover, the latest information on how these changes lead to clinically relevant health problems and current strategies of countermeasures are reviewed.
"Right after I landed, I could feel the weight of my lips and tongue and I had to change how I was talking," Hadfield said in the press conference, which was broadcast on the Canadian Space Agency's website May 16. "I hadn't realized that I learned to talk with a weightless tongue."
Speech is one issue, but other health effects are more pressing for long-term orbiting astronauts. Bone density lessens at a rate of 1 percent a month. Muscle mass shrinks. Eyeball pressure changes, with roughly one-fifth of astronauts reporting vision issues.
Until about June 3, Hadfield will do an intensive battery of testing and recovery at NASA's Johnson Space Center in Houston before pursuing an independent physical rehabilitation program for a few months.
The data gathered during this period is crucial not only to ensure his health, but to add more information ahead of the one-year International Space Station crew missions NASA plans to begin in 2015.
Physiological effects
Many of the environmental conditions experienced by humans during spaceflight are very different from those in which humans evolved; however, technology is able to shield people from the harshest conditions, such as that offered by a spaceship or spacesuit. The immediate needs for breathable air and drinkable water are addressed by a life support system, a group of devices that allow human beings to survive in outer space.[7] The life support system supplies air, water and food. It must also maintain temperature and pressure within acceptable limits and deal with the body's waste products. Shielding against harmful external influences such as radiation and micro-meteorites is also necessary.
Of course, it is not possible to remove all hazards; the most important factor affecting human physical well-being in space is weightlessness, more accurately defined as Micro-g environment. Living in this type of environment impacts the body in three important ways: loss of proprioception, changes in fluid distribution, and deterioration of the musculoskeletal system.