Slashdot Mirror
Time-in-Space Record Broken
NoFrance writes "Russian cosmonaut, Sergei Krikalev has taken the record for most time spent in space away from fellow Russian Sergei Avdeyev. At 748 days in space, Krikalev has an impressive list of accomplishments to his name, including : back-to-back 6 month tours on mir, he flew on the first joint US-Russian space shuttle mission, and a member of the first crew to live on ISS. He is currently commander of the ISS in a six-month stint that began on 14 April. Most impressive is his ability to deal with the physical hardships in space. In space most people lose around 1.5% of their bone mass per month, even with a disciplined exercise regime. And growing the bone mass lost from a 6 month stint back, can take a long time."
748 days? Wow. Think about that - it's more than two years. Quite an accomplishment indeed.
Out of curiosity, what's the record amount of time spent in space by a US-American astronaut?
quidquid latine dictum sit altum videtur.
In Soviet space, bone loses you!
Did you know subscribers can see articles in the future? Holy shit!
Frequent Flyer miles he accumulated?
And growing the bone mass lost from a 6 month stint back, can take a long time.
I hate comments like that. Immediately I want to know how long, but all I know is that it's the ever-subjective "a long time". Gee, thanks.
(wow that sounds really negative.. it's not actually *thaat* important to me... oh well)
(And Sergei, man, I'm so sorry you had to hear about it like this...)
Man is a slave because freedom is difficult, whereas slavery is easy.
I thought there was a problem with the space-time continuum.
Many space-farers go through a syndrome similar to depression after the novelty and excitement of the first few weeks in space wears off. It is marked by fatigue, lack of motivation, irritability, and problems sleeping.
:)
They better make those soon-to-be-here flight to moon & mars entertaining, otherwise, they might get sued by guys who are able to pay 10+ milion for a vacation
Actually, do astronauts get plain vanilla worker's comp like the rest of us here in the states, or does NASA have some custom designed insurance policy?
i have to wonder why a simple system hasn't been impemented yet?
The war with islam is a war on the beast
The war on terror is a war for peace
Will artificial gravity negate the effects of zero-grav on bone density?
Execute? [Y/N] _
Where does the bone mass go to? Do they have calcium suppliments on the IIS? My pet bird can lose bone mass too if she lays too many eggs and doesn't get enough calcium back. I can't imagine what being in space would do to the poor egg laying bird
Then you would understand just how short a time 748 days in space truly is.
A simple Troll, born of Rock and Fire, leaving in the basement of my parents volcano and typing on an asbestos keyboard.
erm.. when and how is he going to get back?
Did he just not miss the last bus?
Considering that the amenities on Mir and ISS make a World War II era submarine look like a 5-star hotel.
No folly is more costly than the folly of intolerant idealism. - Winston Churchill
I've been in cyberspace for decades from my parents basement.
"Sergei Krikalev has taken the record for most time spent in space away from fellow Russian Sergei Avdeyev"
Man- that Sergei Avdeyev must be pretty annoying if Sergei K has to go to space to stay away from him.
I wish I had no bones!
Because the engery required to do this would be ENORMOUS and very costly to implement.
Go here for teh [sic] funny.
Calcium suppliments don't help. The problem is your body realises that you have too much muscle mass and that you are too strong for microgravity, so it stops reinforcing your bones until it percieves a need to strengthen your bones. It's not a lack of available calcium. It is the exact same phenomenon that plagues people on bedrest. Even though they are given the best food and nutrition available when they are off bedrest they are weak and frail.
-everphilski-
Seriously, I wonder what they do for entertainment? Lan parties? MMORPGs? Can bit torrent stream shows to them? Any answers would be welcomed!
We can't anymore.
I think this might be the first guy to lead a team to Mars since he knows what to expect while in space. Although he might want to play Russian Roulette if all his crew members are whining Americans who can't understand why the ship to Mars has no warp drive.
I was a hit at parties!
"And growing the bone mass lost from a 6 month stint back, can take a long time."
He would be the perfect person to study the health effects of long term space travel. That way humans would not only know what to expect on a trip to say Mars, but humans perhaps could come up with ways to counteract any sort of negative effects that space travel has on the human body.
This is my opinion. To make sure you don't steal it, it's covered by the DMCA.
Do piss off, you and your website, there's a good lad.
In previous discussions about a mission to Mars, the suggestion often comes up about a one-way trip -- one or more explorers who make the trip with no intention of coming back. Pioneers, really, rather than explorers.
This poor guy, who keeps getting tapped for "hey, ya think you can spend another year or so in zero-g, tovarisch?" is probably having it worse and worse when he comes back to Terra. How much of his "stamina" is due to some freak of biology, and how much comes straight from a Soviet-era "We invented it first, and better!" mindset?
If he's starting to feel those months in space when he's back on Earth, maybe Krikalev might want to take it easy in his retirement. Like, about 62% easier? Although medical facilities on Mars might be a bit lacking, even by Soviet standards.
Stressed? Me? Of course not. Stress is what a rubber band feels before it breaks, silly.
"I'm going to orbit Disneyland!"
A feeling of having made the same mistake before: Deja Foobar
That's not a bad uptime!
It was a really good paper.
is that it gives you that funky village people hairdo 24/7. No wonder he keeps going back in space...
"A door is what a dog is perpetually on the wrong side of" - Ogden Nash
This guy's a freakin astronomical space badass. He would be the stereotypical grisled veteran in any space movie. Must have been pretty daunting for the space newcomers aboard Discovery to meet the guy who's probably spent more time taking dumps in space then they've been training.
That sounds like SPACE MADDNESS !!! to me...
How long before he tries to eat a bar of soap?
http://en.wikipedia.org/wiki/Spaceflight_records#T otal_time_in_space_-_top_50_space_travelers
* Winners compare their achievements to their goals, losers compare theirs to that of others.
With long stints like that without sex, he could be a slashdotter. :-)
RIMMER: How are we fuel-wise?
KRYTEN: Unchanged for today, sir. However, the supply situation grows
increasingly bleak. We've recycled the water so often, it's beginning
to taste like Dutch lager.
Shannon Lucid spent 188 consecutive days in space (as compared to 366 consecutive days for cosmonauts Vladimir Titov and Musa Manarov). I, too, am curious for our current record holders for most number of total days in space.
Ben Hocking
Need a professional organizer?
It's a simple question, I know, but if the exercise program isn't doing it, what else makes the bone mass come back?
Their dependents mostly get to keep the benefits they had, minus the paycheck.
Servicemen and women can sign up for cheap AD&D insurance, even though they are about to leave for war (or space).
Civilians who sign on get the Federal Gov insurance and bennies, which aren't as nice but it's still there.
He's been in space more than two full years (24 months). So at an average loss of 1.5% per month, he now would be expected to have less than (1-0.015)^24 = 69.577614% of his original bone mass. That's not insignificant. So how much has he actually lost, and how has he been beating this?
bone loss...
There is hope for people who claim to be big boned!
-- botsex is {grep;touch;strip;unzip;head;mount}
Expect this story to be re-posted every day as new 'news that matters' until he comes down...
I say sample this guy's DNA or lets clone him. He will be way to old to go to Mars. He could the basis of a "founding event" for a space fairing subspecies.
> people lose around 1.5% of their bone mass per month
Reminds me of my favorite far side: The boneless chicken ranch
Kiteboarding Gear Mention slashdot and get 10% off!
Yes. I thought at first that he had spent 748 days in space *away* from fellow Russian Sergei Avdeyev, then I re-read the sentence and I see that "taken away the record from" was the intended meaning.
Let's see which shuttle picks the cosmonaut up from the ISS. Err, I mean picks up the cosmonaut from the ISS.
Those Commies are beating us again! Drat! Get some astronauts up to mars NOW! Lets see them beat that! HA.
If you're going to go for Red Dwarf quotes, I would have gone for: Lister: You know what the problem is. Every day it's the same old slot in deep space. No variety. Take Christmas. What did we do Christmas day? Kryten: Oh, ah, you remember, sir. Christmas day, we were attacked by that pan-dimensional liquid beast from the Mogagon Cluster. Lister: Maybe that wasn't such a great example. I'm trying to say our lives are dull, repetitive. We never take time out to smell the roses. We never celebrate anything. Cat: We got nothing to celebrate with, bud. Kryten: Oh, not true, sir. There's a whole case of that wine I brewed out of urine recyc, just lying there, practically untouched. Lister: Call me pretentious if you like, but for me, a truly great wine should not leave you with a moustache that you can only remove with turps.
Build it, and they will come^Hplain.
So I wonder what it would feel like to return to Earth after that long in low gravity. Would it be very uncomfortable?
My humor is probably your flamebait
Even more impressive, Sergei can write English better than the average Slashdot editor. He doesnt have too many or too few commas, his clauses match their antecedents, and adverbs are not nine words away from their verb. That is something the up of which he will not put.
I keep hearing this over and over. So, make the spacecraft be able to split into two equal parts. Include a few hundred meters of cable to connect the parts. Rotate.
What's the problem?
I choose to remain celibate, like my father and his father before him.
Get your bone back with viagra.
close to 300 (299,2 *hundred thousand) million miles ought to make him 26 minutes 42 seconds younger than he should be.
Lev: "No, I never saw Star Wars."
Lev: "American components, Russian components... all made in Taiwan!"
Exercise generally does squat to retain or build bone mass. NASA research has been indicating that it's the vibrations which occur while you're exercising that actually stimulate the bone growth.
w eak_knees.html
http://www.nasa.gov/lb/vision/earth/everydaylife/
http://my.webmd.com/content/article/34/1728_85890
http://www.galileo2000.nl/home/Eng-galileo.htm
Astronauts will still have to do exercise to keep from losing excessive muscles but in the future we'll just vibrate them a bit while they're in orbit to keep them from losing bone density.
The Russian Space agency would probably have more accomplishments if they didn't seem to require every cosmonaut to be named Sergei.
Dear Sergei, quit hogging the space station, the other cosmonauts want to play too.
Sincerely,
Your Space Comrades.
I wonder what kind of crazy space-diseases he's picked up, but has also developed antibodies for. When he comes back to Earth, he'll destroy us all! We'll be turning to piles of salt or rapidly aging...
Wer mit Ungeheuern kämpft, mag zusehn, dass er nicht dabei zum Ungeheuer wird. --Nietzsche
I'd be way more worried about the damage done to his tissues by energetic cosmic particles that didn't get decelerated by that pesky atmosphere we have. He is certainly at a much higher risk of cancer than your average terrestrial human.
Ceci n'est pas une sig.
According to Nasa:
"Dozens of astronauts have used the Space Shuttle Amateur Radio Experiment, or SAREX, to talk to thousands of kids in school and to their families on Earth while they were in orbit. They have pioneered space radio experimentation, including television and text messaging as well as voice communication. The Russians have had a similar program for the cosmonauts aboard the Russian Space Station Mir. When U.S. astronauts were aboard Mir in preparation for the long duration missions of the International Space Station, they used amateur radio for communication, including emergency messaging while Mir was in distress."
One of the worries about sending astronauts on long insterplanetary voyages is that solar radiation can cause cancer after months of exposure. My question then: Isn't he supposed to be at risk of developing cancer?
Or is he still protected by the earth's magnetic field (then again, that won't sheild photons.)
The reason why Krikalev has all this mission time is that he's shockingly competent and comfortable in the very stressful environment of space. They've tried out many people, but from what I read, conditions that would cripple an ordinary tough guy don't get to Krikalev. I mean, come on, his other job is stunt pilot. This guy is a badass and I hope he fathers a superior race of superspacebeings.
I've been living in Space for 12,045 days. That's 33 years of space filling goodness...
Now, outer-space...That would be a 0 (zero, el zilcho, nada)...
Would a person in a high-gravity situation (relative to earth's gravity) gain far more bone mass? Perhaps in the future days of commercial space travel we will see professional athletes going on sabbaticals to space stations around Jupiter to take advantage of the increased gravity. When they come back to earth with higher bone mass they could then proceed to gain more muscle mass when working out, in order to gain an edge over their competition.
Cyric Zndovzny at your service.
Were they pretty close before this? Kind of a mean-spirited competition if you ask me...
I wonder if the astronauts on Apollo 1 demanded a safe workplace?
In all seriousness, they probably get some kind of health cover comparable to the military - their service with this civillian space agency will probably give them serious long term health problems while procedures for safe exploration of space are being worked out.
Many space-farers go through a syndrome similar to depression after the novelty and excitement of the first few weeks in space wears off. It is marked by fatigue, lack of motivation, irritability, and problems sleeping.
I've had this problem now and then at every "normal" job I've worked at so far.
How about Video Game and internet? I would stay there 800 days straight!
There was a quote from the article that was overlooked, for not-so-surprising reasons:
Researchers are also not sure whether the quality of the new bone matches that of the bone mass lost, he told New Scientist.
This is important for one main reason, that most people don't know. Bone marrow turns into fat as people age, and Krikalev has done quite a bit of aging in the last two years. This article is somewhat related to the subject, and you all might find it interesting.
What is humor if not pain tempered by time?
I think the Van Allen belt is much farther out than the near Earth orbits we have today.
The moon missions had to worry about cosmic rays, and the colonists on Mars will definately have to worry about them, since the Martian atmosphere is thin and cloudless.
Michael
The Earth's magnetic field will help protect against any charged particles (including photons, electrons, plasma particles, etc.) because magnetic fields exert a force that points in a direction perpendicular to both the path of the particle and to direction of the magnetic field. This causes charged particles to be confined to a helical path around magnetic field lines, which prevents many of them from penetrating the field and striking the earth. (These particles accumulate at the poles and are responsible for the Aurorae Borealis.) Neutral particles, such as neutrons, pass through unaffected, but can be slowed down by collisions with other particles, such as in the Earth's atmosphere. I believe even in low-earth orbit you are protected by the magnetic field, but you lack the shielding of the atmosphere, and rely solely on the walls and windows of the spacecraft for protection.
Ceci n'est pas une sig.
I made a mistake in that post, where it says "photons" it should say "protons", i.e. ionized Hydrogen.
Ceci n'est pas une sig.
This is how you'd keep a big rotating space-ring in dynamic balance as persons and equipment move around in it:
1) Big storage tank full of water at the center axis
2) Many small tanks evenly spaced around the outer perimeter
3) Pumps, valves, hoses, sensors and a computer system
4) ???
5) Balance!
The surface of the moon is 1/6th Earth's gravity, not 1/8th. And simple algebra tells you that if a 200 pound astronaut "weighed" 180 pounds on the Moon, he would be carrying 880 pounds of stuff (180x6)-200.
And no, there is no conspiracy. Spinning an object in orbit of another body requires constant energy input because the interaction between the two bodies scrubs off angular momentum over time. Not to mention the docking and communication headaches. You couldn't have a high gain data link, looking out a window would make you sick, just not a practical idea in low Earth orbit.
Coding with assembly is like playing with Legos. Coding an application in assembly is like building a car with Legos.
Isn't about time to try some sort of spinning assembly, perhaps only part-time, just to regain some bone mass?
[ReidNews]
I do bone density measurments for a living so here are some comparisons.
If he has been loosing 1.5% of his bone mass a month (this is measured from a baseline prior to flight) he's down around 36%. This would put him 6-7 standard deviations below what's normal for his age. While this is very very serious consider these two things.
1. The younger you are the better your bones are at avoiding fracture regardless of bone mass. Low bone mass doesn't help of course, but he's still probably better off than a 75 year old woman.
2. People with various diseases like celiac sprue are seen to have densities this low and recover very well when the cause is eliminated. Thus when he returns to normal g he should see rapid bone remineralization. However
This process will take two or more years. So if you wanted to know what "a long time" means. There it is. After two years at 1 g, I suspect his bone mass will be 95% of what it was at baseline.
In the meantime he has a hugely increased risk of fracture and will/should probably have to wear all sorts of special padding just in case he falls over.
As Re-entry can easily hit 5g, I think that would be the scariest part of the whole ordeal.
I would be interested to know if he will be put on an anti-resorptive thearapy such as Fosamax or even Forteo, though they would probably only do that if he wasn't regrowing bone on his own.
-Ian, CDT.
Am I the only one who mourns the end of cold war? Whatever the societal consequences, cold war was pretty good for science & tech, especially space exploration.
Soviets, for all their faults, had a very impressive & wonderful space program & aviation. Buran, Proton, Soyuz, N-1 & various Mars & Venus probes.
Look, after the collapse of the USSR, Russia's space program is nowhere, as is their Aviation, their military & other science hardware.
A sad, sad develeopement..
(and, plz, hold the Soviet Russia jokes, its stale )
Actually, rather like so many "relativistic" types of things, we're all in space. We just happen to have this cool atmosphere thingy, and a really grabby big mass of dirt to fall down on.
Now, maybe what he's really broken is the amount of time spent at least x-many miles away from a planet of y mass or something. So, really, until he's the oldest man alive(space radiation extreme!), he's got nothing(beyond bone loss, and possibly being truly out of reach of a Jehosephat's Witness).
... thought that read IIS. I thought, jeez, no wonder he had so many exploits to brag about.
I've got some bad news for you. Every human being is at risk of developing cancer.
Also, watch out! You're being bombarded with photons right now! Your monitor is spewing out COUNTLESS MILLIONS of them as you read this!
Luckily you're generally safe as long as their wavelength is longer than 380nm. Otherwise you'd be at a GREATER risk of cancer.
Coding with assembly is like playing with Legos. Coding an application in assembly is like building a car with Legos.
748 days
.0000261 of light speed?
;^)
* 24 hours
* 17500 mph (yeah, approx)
= 314,160,000 miles
I'd say he's probably the furthest traveled human being.
Is a lifetime of car/boat/plane travel further than 748 days in orbit? It would take you nearly 600 years to travel that in a car at 60mph, or nearly 60 years at 600pmh in a jet. Seems like we have a winner....
Next step - what is his relativistic time shift having spent two years at
Maybe just his dog is old?
The costs can be offset by allowing the Ferengi to open a cantina/brothel on the promenade deck.
They should notice different levels of gravity when they travel from planet to planet on StarGate. Yeah, I know, everyone speaks English, but I hadn't considered the gravity thing before...
Marques Johansson
Something put, that is, up with which he will not.
Marques Johansson
Russian cosmonaut, Sergei Krikalev has taken the record for most time spent in space away from fellow Russian Sergei Avdeyev.
What's so wrong with Sergei that there's a record for spending time in space away from him? Bummer for him!
But we can always clone..... why bother?
How does staying in space for a month compare to laying in bed for a month because of some illness, with regard to exercise? Probably under a coma so the body doesn't move at all? Do we go under similar conditions or does the mere presence of gravity give a certain amount of "exercise" to the body and thus prevent the bone-loss/damage thing?
I know that this sounds really odd to a lot of rational people, but I have reason to believe that an alien invasion of earth has already begun and been in progress for the past thirty three years. There have been many signs, but the evidence I've found with a simple Google search reveals the presence of aliens on earth hiding in plain sight. Here is a perfect example:
The actor called "Vincent Hammond" is most obviously not from Earth. I was watching the Outer Limits the other night and something seemed very wrong about the evil alien characters. Rather than the usual bad FX that the SciFi channel is so ready to use at a moment's notice, the evil character, Koltok, seemed far too real. Even more telling is that this supposed human actor named Vincent Hammond not only played one, but two aliens in that episode. As if that weren't enough, when I researched this "Vincent Hammond" I could only find pictures of him in various TV shows portraying very similar looking aliens. See here and here. Now could it be that the reson for this is that the same designers were involved in multiple productions? This is highly unlikely. It's a lot more likely that "Vincent Hammond" is an alien and that they really aren't using much makeup on him when he is featured in these programs.
Also, those Hollywood types are weird enough that they wouldn't even give the idea of employing a space alien, if it makes them money, a moment of thought. We've got major problems. Aliens are among us and they are slowly weaving their way into our collective unconsious. This is highly risky and could lead to an acceptance of their villainous treachery. So keep you're eyes out for space alien scum and make sure that if you see one in person to notify the authorities. THe more warnings like this that the police and military get, the more likely it is that they will begin to take the warnings seriously.
-"...bad old ideas look confusingly fresh when they are packaged as technology" - Jaron Lanier (Digital Maoism on Edge.o
Liz: It's just that with Ed here, it's no wonder I always bring my flatmates out, and then that only exacerbates things.
Shaun: What you mean?
Liz: Well, you guys hardly get on, do you?
Shaun: No, I mean, what does "exacerbates' mean?
It's "no one," not "noone." Who the hell is noone anyway?
wow 748 days without masturbating.....I'd be ready to slit my wrists.....either that or he is very comfortable with everyone back in mission control knowing what is going on. Control 1 do you read elevated heart rates - yes control should be normal in 3 minutes. lol, Dean
Ever wonder why Russians are always first in pushing the human body to the limit of its exposure to harsh environments? Russians also hold the record for longest time fixing nuclear reactors without radiation suits, longest time spent underwater in sunken submarines with no air, longest exposure to exploding rocket fuel, largest populations in the coldest climates.
Given that space has many times more radiation than Earth and financial limitations require Russians to train fewer astronauts for longer missions, the longest time in space seems no less like Russians refactoring their predicament into a bragging right than their submarine records.
or did he? do astronauts masterbate and how? do they carry condoms with them? not flaming..but honestly curious
Of the 33 top place getters, 31 are Russian.
This could be called "A Tale of Two Sergeis." Comedy gold.
I am scientifically inaccurate.
Alendronate (e.g. Fosamax), zoledronate, etc.
Can anyone guesstimate how many billions of dollars were involved here?
- Cost of space station
- Cost of supplies and supply delivery
- Round trip cost
We don't have to count the money to fix the shuttle, or any other shuttle costs (?), so that saves a billion or two.I'm sure the hard core manned space flight fanatics think this is a great expression of man's quest for exploration or whatever, spending billions of dollars so that Joe Schmo can sit around in orbit for a couple of years. Really important medical advances, here, really important. And science. Science.
Think of all the unmanned missions throughout the solar system and (shall I dream?) beyond that could have been made with that kind of money. How many Mars Rover missions could have been paid, or trips to the moons of the large planets, or setting up a series of unmanned base stations from the earth to Mars to mount ever more sophisticated and ambitious missions? That my friends would be Space Exploration, not this piddly bullshit we have to be content with.
the internet...
Ok, so Russian cosmonaut, Sergei Krikalev has taken the record for most time spent in space with a whopping 748 days in space.
Now that's really quite something when you consider the technology that we're putting folk up into space with, particularly in light of recent issues getting back with Shuttle missions.
Indeed his ability to deal with the physical hardships in space is quite something, when you consider that under a single atmospheric preassure of 1G, the average American is unable to remain in shape (and tending towards obese), Australian's are unfortunately not much better frankly.
So I can only imagine what the strain of keeping up with the challenge of what must be a massively disciplined exercise regime.
Check out the whole story over at New Scientist magazine online.
My ongoing consern though, and this record simply brings it back to mind, is that if we've got the world's best out there in near earth orbit, pulling just 748 days so far non-stop.
And that's without the rigors of deep space travel, heck, that's without what should be a reasonably simple challenge of travel within the local group of planets!
How exactly are we going to eventually break the bounds of our planet and travel out to the local planets, and beyond?
Space is big, Really big. And that's just the local group, let's not boggle our minds with the really really really big, let's just stick with the really really big.
Interplanetary travel involves distances of hundreds and thousands of millions of kilometers between fast moving objects (planets for example).
For example, the Earth travels around our sun at an average sleep around 30 km/sec, Mars is traveling at around 24 km/sec (so that's a difference of about 20,000 kilometers per hour!), and the distance between them is millions of kilometers. Phew - brain hurting yet?
The legal definition of space is 50 kilometers up, but for our purposes, "space" starts about 200 kilometers up.
There's still a heck of a lot of atmosphere ("lot" being a relative term) there, but an average satellite can stay in orbit for weeks before the atmospheric friction slows it enough so it falls out of orbit.
I don't want to belittle what is in todays terms simply a herculean effort. 748 days is 748 days, simple as that, and it's the current record, and more power to Sergei Krikalev frankly.
But at that rate, and we're talking a mere couple of years really (2.04 years), that's not even a one way trip to some of our nearest neighbors, let alone the return trip, if you were thinking of coming back that is * grin *
We are though using developments from space technology to do some pretty weird things, for example, the industrialization of a NASA-tested concept for artificially creating meat!
According to a recently published academic paper, Edible Meat Can be Grown in a Lab on Industrial Scale. ( read more about it at GizMag ).
I wonder if vegies and vegans will now consider eating meat if it doesn't involve killing a living breathing animal? Doubt it.
Anyway - Three cheers for Sergei, but as for the rest of the space program, no dice, we're clearly generations away from truely being a space faring people.
Mores the pity!
--- Dez Blanchfield http://WebSearch.COM.AU "Will work for bandwidth.."
In another scenario the entire crew running (at evenly distributed locations) will increase or decrease the rotational speed, hence increasing/decreasing "gravitation".
Also, the influence of personel movement on rotation speed and center point would depend on height relative to the centre. Climbing up and down to the core (and as/decending at the other side) should be noticeable, but even standing/lying down has minor effects that might accumulate.
--
There's no future in time travel
You seem to know your stuff pretty well (or at least, a lot better than I do), while also your opponent seems to have a good point in that it's theoretically possible.
Summarizing, you need rotating joints and stronger beams than currently avaialble, you may be able to relieve some of the strain from the beams by moving some equipment to the rotational center, but on the rotors, nevertheless. (Theoretically, you could do away with the stable spaceship altogether by simply distributing it over the two rotor centres).
I'd like to believe this is all very simple, cheap and light, but that probably isn't true. The lack of seriuous funding for these kind of tech is mentioned in half of the posts on this topic. So my question is: How much would it cost to do some serious research? In actual dollars. Could a privately owned company like Virgin Galactic ever come up with that kind of money, or will space tourism end a few footsteps from where it's currently at?