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#626 Re: Science, Technology, and Astronomy » Earth Atmospherics/Weather » 2005-09-21 15:39:47

RITA is now a category 5

And there is plenty of energy to keep her going I just hope she will fade a bit before she crashes to shore sad

#627 Re: Unmanned probes » SMART-1 - ESA lunar orbiter » 2005-09-21 15:32:53

Evilcitizen the Ion drive has proven itself incredibly. Slow but persistent.

#628 Re: Human missions » The need for a Moon direct *3* - ...continue here. » 2005-09-21 15:25:52

"If we though task a robot with finding one or a limited numbers of elements then that robot will do it and will happily keep looking as long as it has power and is functional or till we tell it to stop"

You can't even program a robot to do that yet, the software is still far, far, far too primative. How can you teach a robot to look for things that even trained geologists have a rough time spotting? Or following terrain trends? No, complete human oversight for all operations besides transit over easy terrain will be nessesarry. This is why humans will always, always win in the end over a "dumb" rover.

What do geologists do to search for minerals they use small explosives move a bit and listen to the reflections of sound of the explosions. They use ultra sonics to detect what the soil content is. They also use a good eye to look around and in space this means taking a lot of pictures to see what can be found. A lot of this can be automated with more promising sites warranting further investigation by human contact.

"The first is within our grasp and on October the 8th the grand challenge may show us this."

And what does the Grand Challenge software do? All it does is tell the rover not to drive directly into an obsticle. Thats all. It has no context whatsoever of what it is "looking" at, all it knows is the image in front of it isn't unobstructed ground.

Terrain observation is a good science for robotics it consists of a robot being able to choose the best means to go around and actually what the terrain means. All very good science to learn.

A Martian GPS network would have to consist of like a dozen or more units to provide decent decimeter-scale accuracy. That is expensive, and humans wouldn't need it.

But if we start to send a lot of people we will need them desperatly and the plan to create a Martian internet is an example of something that actually increases capability and any such coverage also can be used for general GPS signals. Not likely for a while but still it will be needed.

"Tell a robot to look for something and it will very dillegently but it has to "know" what that thing looks like or is expected to look like and as such surprises are not really good for robots. It requires an extremely effective AI to be able to control a rover across an alien world and ignore the mundane and concentrate on the science. We are no where near that capability."

Which is why humans win big, dollar-for-dollar, on the quantity and quality of science versus robot rovers.

Granted, but it is the ability to stay on station and keep working and allowing research to continue that makes them interesting. Again there is also the lightness of the devices that does give them advantages.

#629 Re: Science, Technology, and Astronomy » Earth Atmospherics/Weather » 2005-09-20 13:10:31

It is where it gets the energy in this case from the rather hot tempatures of the water and air.

Rita can easily go up to a strength 4 from the power it will gain from the gulf of Mexico.

#630 Re: Not So Free Chat » Political Potpourri VIII » 2005-09-20 13:07:51

British troops ramraid Basra Prison to bust out British , accidentally freeing numerous criminals, getting themselves firebombed by an angry mob of Iraqi...I Guess they decided the rule of law doesnt apply to them either.



Help! I'm on a planet with six billion stupid people and the Worst case scenarios are in charge.

Maybe you should have heard the rest of the story.

At a checkpoint a group of undercover soldiers keeping an eye on the recent military build up of extreme Shi'te militia where stopped by police. This had lead to the arrest of two key supporters of a radical Shia cleric. Though they had authorisation to operate in that area they where ordered to disembark from the vehicle. A firefight broke out and a policeman was killed. Two soldiers where taken into custody and there was a large crowd "instantly" appear outside the police station (supporters of the cleric). British troops came into the area to restore order and where stoned and firebombed( they did not retaliate) and two soldiers recieved minor injuries. The Iraq central goverment ordered the two British soldiers being held to be released back into british custody. Did this happen no they where handed to the radical Militia instead. This frankly was probably the plan anyway so that they could be used as bargaining chips.

British soldiers did go in and rescue them but they where found not in a police station nor in a Prison but in a militia stronghold in a building next door.

What does this say well it says that we cannot really trust the Iraqi police.

Last year a small contingent of British military police was masacared in an Iraq police station when the police all 50 + of them scared of a mob outside run away. Why should this be allowed to happen again sorry no. The rule of law has to be put there and if the Iraqis cannot supply it then it has to be the British.

#631 Re: Single Stage To Orbit » Realistic solutions to the difficulties of SSTO? » 2005-09-19 06:50:53

Does it really require a separation of Mach 6+ as separation at about mach 5 should be possible especially if at a high height with a much reduced air pressure and as such less risk to a TSTO.

This means the lower carrier craft could be using souped up jet engines with a booster either of oxygen or water in the flow through the engines. And using understood engines then maintenance and turn around should be accomplished a lot faster.

The upper stage would have to be a rocket powered vessel and in this case it would need a reusable engine.

#632 Re: Not So Free Chat » Current Gasoline/Petrol Price$ » 2005-09-18 09:31:22

Interesting little point here about China and Russia.

Japan and China where in competition with each other to get a new pipeline to the pacific. Needless to say many offers of very low interest loans and orders where on the table from both countries so that they could the energy they need to run as countries.

Japan believed it had won the line that would have then ended in Nakhodka and within very close tankerage distance to Japan and the refineries there. But President Putin this week during an interview with western journalists informed them that it would instead go to China and there lines from Daqing to there refineries.

There was a small sweetner that a future smaller pipeline would be put to Nakhodka but for Japan this an incredible blow and a resumption of what in Britain is called the great game. The gist is that countries in Asia are looking at Russia and the Oil from her as crucial to there economies and so the game is played in how to control it. So Russia gains power and so did China this week.

#634 Re: Not So Free Chat » I'll take malaprops for *5* Bob - Apropos of Nothing continues. . . » 2005-09-16 17:25:34

Well he may the most powerful man on Earth, He is in charge of the most powerful country. He controls the most powerful armed forces.

But he has to ask permission to go to the toilet????

Condie, can I go to the toilet

#635 Re: Human missions » The need for a Moon direct *3* - ...continue here. » 2005-09-16 17:14:04

What kills me is how the robotics people will howl about how VSE will 'steal' money from science forgetting that the LVs we get out of the bargain will be superior to that Delta II crutch which forces people to drop science packages anyway due to mass constraints imposed upon them by Launch Vehicle development (or the lack of it)  that the robots-only people have no interest in forwarding.

What many people howled about had nothing to do with Robots. NASA accumalated a lot of things that came under a science umbrella. Look at all the research that NASA did for Aeronautics and even in computer research. It also did studies in material science and food crops anything that could be called space research NASA was to pay for. This is why NASA's budget was so stretched.

NASA has a lot of science satelites from the HUBBLE down to the probes operating to look at the weather and Ozone depletion. NASA to do the VSE will have to cut a lot of money from all of these. HUBBLE is already doomed but so is replacement ozone and Earth research probes.

If you really look at the VSE it actually increases the money that NASA will spend on Robotics. It will use the Robonaut for the first time and NASA will have to actually start manufacturing them. There is also a lot more money for what is called core research this is the exploration probes to the Moon and Mars and a lot will have robotic elements. We are to see a whole new generation of rovers.

Dont worry publiusr the robotics fanatics are more than pleased with the VSE you see their research has for a long time been considered one of the weakest disciplines and money is often cut or have been given shoestring budgets in the first place of course most Roboticists are engineers and not scientists that probably explains it.

If it were up to the military--our largest rocket would be the Minuteman and the Russians' would have been Topol-M, neither of which could have launched Spirit and Opportunity.

We have focused too much on payloads at the expense of the rocket.

We did ignore the rockets as it really does not matter what they did as in the end it is the payload that matters. What is a rocket but a means to an end that of delivering a payload.

But since the glory apollo days we have been stuck in LEO and we did not need a generation of superpowerful rockets. NASA said we had the shuttle to do everything. So we went nowhere fast.

It's time for the robots huggers to know their place. They might hate Griffin now--but when they have the Stick and HLLV--they will be grateful that they can kick that miserable underpowered Delta II to the curb.

You may dislike robots and despise those who work on them but then you are so like the old NASA, that Griffin is so determined to replace. And I am so glad that with VSE there is the chance for more roboticists to get further than the workshop. You may call me a robot hugger and actually I smile at that reference then again I know what im talking about.

And Delta wont go away we will still need to send satelites up and for that Delta is perfect. We just dont need to mix the Human spaceflight and satelites launches together to give the appearance of some form of cost savings.

#636 Re: Not So Free Chat » Political Potpourri VIII » 2005-09-15 05:44:40

Of course they will do this Osama wants his Islamic Caliphate but actually he will need a lot of money to do this and so he uses the western free trade system.

#637 Re: Not So Free Chat » Katrina and New Orleans » 2005-09-15 05:38:52

The Old persons home that this tragedy happened at was ordered to be abandoned. A Bus did come but the propieter refused the order saying her charges where too frail to survive the journey.

When the waters came the people where trapped and they could not get out and they did try to save themselves but it was too late. This was someones fault but she stayed with her charges and died too.

The Old lady who passed away in her wheelchair in the dome had a heart attack and though they tried to save her there was no way the poor medical conditions in the dome could anything be done. So they left her in the Chair was this callous NO

There had been a lot of people who died and had been put in a temporary morque in what was the basement of the Dome. It though flooded and so they had no where to put the lady. Do you think anyone would have been as heartless as to push her down the stairs into the flooded cellar.

There was a lot of lawlessness in the Dome/New Orleans but also a lot of people trying to do there best in a situation which was hopeless.

This is what a disaster is do you honestly believe that any country is prepared for a major city to suddenly be completely underwater and to have to evacuate all the citizens. Do you think all the citizens are going to be willing to leave. There where mistakes and organisation was not as good as it should have been but though we may make plans for such events do you really think anyone actually believes its going to happen. Look at Californians and there Cities on major Faults. Look at Italians and there city of Naples under Vesuvius that has already destroyed Roman cities so quickly. Look at London which has just the same problems as New Orleans and will have to raise its flood defences.

We humans are optimists who tend to believe if the worst happens it will not happen to me.

#638 Re: Not So Free Chat » Current Gasoline/Petrol Price$ » 2005-09-15 05:21:53

Hah! Virgin Oil...!!! I'm sure they killed themselves over that joke in the boardroom.

They laughed so much that British airways(Virgin Airways arch rival) and the British goverment have come on board. They are now currently looking for sites for this new refinery either Europe or Nigeria. In fact they laughed so much on the stock market it made Virgin airways quite a few points up and Richard Branson another couple of million Pounds.

Airlines are in serious trouble with there biggest problem the 9/11 factor and now the increased fuel costs. Today two US airlines have sued for Bankruptcy protection. This is Northwest and Delta they now join United and US airways in the legal limbo of Chapter 11.

The reason given for this is Costs. The cost of insurance and the cost of Fuel.

Im laughing too I have shares in Virgin  lol

#639 Re: Martian Politics and Economy » Katrina hits mars? » 2005-09-15 05:10:59

Oh No im agreeing with clark...(sound of several thuds as head bangs of desk repeatedly)

I would be a bit hesitant about not refering to the feel good factor. The manned space race has been used as a symbol of national pride and a physical object for people to feel good about. Only recently the president of Russia had to disapoint his people with we have more important things to spend our money on than space missions. Still feel good and patriotism are not tangible features but they do have power for the common person.

If we though really want the common person to feel involved in manned space then we have to give him or her the feeling that they and more importantly there children will get jobs and benefits from space. As an example if we go to a hydrogen economy and we need a lot of platinum and find it easier to gain from the Moon than elsewhere this will be a major step. If that person sees there car with a Moon derived platinum catalyst and there son or daughter getting well paid for there shift in either support of or direct work in space industries.

Manned spaceflight is seen as an elite profession you have to be the creme de la creme and well connected too to ever get a chance to be an astronaut. This paradigm has to change we have to make everyone believe that they have a chance if they work hard. This can only happen if there is more manned spaceflights not less.

So we are in classic dammed if you do or dammed if you dont scenario. There will not be a general public support for spaceflight beyond the gestures we are doing until we have something to engage all the public in space and no support to have a lot of missions. We will not be able to engage all the public till we have a lot more people flying on these missions and a feeling that everyone can be a part (and get paid).

#640 Re: Human missions » 4Frontiers » 2005-09-15 04:31:47

You can bury your base on the Moon too. In fact, it would probobly be a little easier, thanks to the Moon's nanoscopic-iron laden dust ("Mooncrete") and lower gravity.

That nanophase iron is really, really cool, isn't it? Sinter it with microwaves and make dust free roads, as another example.

Stick it in a furnace and a large magnetic source and you get magnetic bricks that just want to stick together big_smile

#641 Re: Science, Technology, and Astronomy » Earth Atmospherics/Weather » 2005-09-14 18:11:19

Ophelia is a hurricane again, They sure named this one right what a fickle monster

#642 Re: Not So Free Chat » Current Gasoline/Petrol Price$ » 2005-09-14 18:08:02

What is truly hurting the price of Oil is not that we are producing too little from the ground it is that there is not enough refinery capacity to process the Oil. Though the damage to the Gulf of Mexico oil production capacity is bad it is the loss of 8 major refineries that has hurt the most. Those 8 refineries that are out of action are actually of greater capacity in total than the 8 that are present in Saudi Arabia.

Though it is possible to actually produce all the Oil that is needed and an excess for storage too we actually do not have the refinery capacity to process that much. Oil refineries across the world have been on flat out rates for many months now and wear and tear begins to be a big problem. Many refineries are in urgent need for a shutdown and overhaul and a good check.

Sir Richard Branson a major buisness figure here in the UK and incidentally heavily involved in Virgin Galactic the partner for Burt Rutan has announced intentions to build and operate his own refinery. The reason he needs a consistent source of fuel for his aircraft (Virgin Airways) and has offered to the other major European Airlines a chance to join in to secure there Fuel.

There is good news that 4 of the 8 refineries will be back even if to limited production by friday but it still does not solve the problem the world has. Oil demand is often cyclable with demand increasing in the Northen Hemispheres Winter and Spring months and reducing in the other months. We can store Oil but with our lack of refinery capacity we struggle to make enough refined products and the producers know that if they make too much they will have to store it at there cost and sell at reduced prices. These producers are therefore not interested in actually increasing the refinery capacity why should they it would lose them money. What has to be done is to actually have goverments build refineries so that there is surplus refinery capacity and then stockpiling of fuel can be done for major disasters and when reduced oil and petrol production happens.

This will involve a loss to these goverments but you have to ask just how expensive and devisive has the recent oil shock been to the world and it can only get worse. Better put a fix in now as there is plenty of things that could put bigger stresses on the price of Oil. (Major civil war in Iraq spilling across borders!!!!)

#643 Re: Human missions » The need for a Moon direct *3* - ...continue here. » 2005-09-13 17:41:27

And they are supposed to make leaps and bounds in only one generation of robot-driven vehicles? And be reliable enough to risk a billion-dollar robot to not have any "hickup" with the advanced and highly complicated computers? Oh I doubt that, it will be years and years before we can trust a Mars rover to such a computer, since without a real-time link no babysitting is possible. Possible? Maybe. But the chances that it will be robust and reliable enough? Slim.

But robotics are doing just that they are taking leaps and bounds. Though I have to agree that for the forseeable future Human oversight will be essential for a science based Martian/Lunar rover. Still that is due to us asking the rover to do a lot more and it needs human observation to say oh that is interesting. We will not be able to program in a curiosity that we can effectively use for scientific research. If we though task a robot with finding one or a limited numbers of elements then that robot will do it and will happily keep looking as long as it has power and is functional or till we tell it to stop. The Martian Rovers are just too universal things if we wish to use robots more effectively we have to have them specialise a bit. Tell a rover to do a mineral survey scanning for ilmenite and avoid hazards is a lot easier job than telling a robot to look for everything. The first is within our grasp and on October the 8th the grand challenge may show us this.

Oh, and don't forget, Mars has no GPS constellation

So build one we will have to anyway when we go to Mars in force as we will need a reasonable series of satelites and observation platforms to ensure communication and "weather" reports. (ps nothing to do with this question but Darpa will give a bonus to the team that completes the grand challenge without access to GPS- probably looking at the long view that and the need to fight a war when you have had your satelites knocked out or had to switch them of)

So you teach the thing to drive over, say, half the Martian terrain without active stop-and-go control? Swell, but thats only a portion of the time the rover will operate, it will still be stop-and-go when you reach your destination to actually do anything.

A robot is as only good as the purpose you want it to do. Currently we are using very small rovers which are doing a great job but are hardly getting a lot of the surface seen and are easily threatened by Dust and terrain hazards. If we wish to travel further afield then we need to send a bigger rover and preferably powered by a nuclear option battery. I have never said that a rover or robot is as good as a man doing the same job but we are not going to have people there for a while so we should wet our appetites with what the robots can do now. Any Mars mission will have a whole load of robots there to support the people anyway.

Tell a robot to look for something and it will very dillegently but it has to "know" what that thing looks like or is expected to look like and as such surprises are not really good for robots. It requires an extremely effective AI to be able to control a rover across an alien world and ignore the mundane and concentrate on the science. We are no where near that capability.

Robots are always going to lose in science-per-dollar

No robots win in the science for dollar route. What they lose in is universal flexibility and reasoning and more importantly the reason to go to space in the first place that of spreading mankind.

#644 Re: Not So Free Chat » Katrina and New Orleans » 2005-09-12 17:29:15

The most striking of the forces included the abnormally warm waters along the Gulf Coast and an unusually large mound of swirling high pressure in the atmosphere, centered over the Caribbean and known as the Bermuda High.

The jet stream, a powerful, snaking easterly rush of high altitude air that could have fended off Katrina, played a role by its absence. Snuggled against Canada, the jet stream was out of reach, where it typically is this time of year.

The jet stream was pushed north against Canada by the Bermuda High , the Bermuda High has been written about as long as people have been sailing to the Americas, and as for "unusually warm waters along the Gulf Coast", what were the temps? For Gulf water temps to be "unusual" they would have to be pretty darn high this time of year -- I grew up surfing those waters (back in the 1960s and '70s) and in the summer you can only stand it for an hour or two: typically in the high 90s F.
(I've surfed them at 99 degrees F plenty.) Were the temps in the 100s?

Yes but it was the overall water tempature of the Gulf of Mexico that was recorded as the highest ever reached and as such supercharged Katrina from a weak level 1 to a monster level 5. The mean was reported as 30.2 degrees centigrade here for water tempatures and though I cant find the link it explains why when Katrina did turn towards land again it was such a threat.

But thankfully the waters are now cooling and the threat of another super hurricane is recedeing

#645 Re: Science, Technology, and Astronomy » Earth Atmospherics/Weather » 2005-09-12 16:58:38

Ophelia is moving now 3mph going NE and it is losing a lot of its power. I hope by the time it hits land its only a squall.

#646 Re: Human missions » The need for a Moon direct *3* - ...continue here. » 2005-09-12 16:16:09

But the last DARPA grand challenge was not a failure it brought a lot of money into research of advanced Robots. So what if no one actually managed to finish the challenge it was what they learned that made it so good. The next grand challenge is due very soon and there is a lot more money and resources now behind the teams. There is also a lot more teams too.

The MERS where designed almost ten years ago and as such are teleroboticaly controlled. They are also slow and need a lot of oversight. With luck this can be sorted in this the next generation and we get a decent set of hazard avoidance.

#647 Re: Not So Free Chat » Katrina and New Orleans » 2005-09-11 14:52:21

Many of the refugees are stating they will be back and that New Orleans will rebuilt. All I can hope is that these statements get Federal backing as courage and determination are only so good as the resources they are given.

Still the first people who need all the help they can get are the red cross who need volunteers and then the Army core of engineers who need to be able to build a lot more superior flood defences.

#648 Re: Human missions » The need for a Moon direct *3* - ...continue here. » 2005-09-11 14:45:00

The principle of the next generation of probes is that they will be more self controlled using techniques we have employed in the latest generation of UCAVs. Terrain avoidance with only general goals being given from Earth and then the robot taking the best way forward.

These can best be seen in the upcoming Darpa Grand Challenge.

#649 Re: Not So Free Chat » Political Potpourri VIII » 2005-09-11 14:37:56

I can only hope this is the use of nuclear weapons to ensure the destruction of other WMDs

In the case of Biological and Chemical weapons it has been thought that only incredible heat could ensure complete destruction.

Then again it does not sound nice when the principles of MAD are removed especially when it has been the unwritten rule that he who launches the first bomb will be attacked by everyone else in retaliation.

#650 Re: Meta New Mars » About the Lunar Republic » 2005-09-11 06:07:33

There was a Scottish lawyer to prove the point that the 1967 outer space law was hopeless actually claimed ownership of the Sun. And since it has supplied light to us for 3 Billion years or so we owe him 3 Billion years of charges.

Im certain that when a country makes it to the Moon and lands then someone will challenge them in a court of Law. But they will also lose the case as it really comes down to who is present on the disputed territority.

And this only applies to countries who are actually members of the 1967 treaty and one other facet of this treaty is a country can leave it and as such not be bound to its tenets.

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