Absolutely incorrect, at least in PuTTY's case. I use public key authentication via PuTTY a dozen or more times every day.
I can't speak for TeraTermPro, I haven't ever used it.
Re:I'm a big fan of Robert Zubrin's book...
on
The Case for the Moon
·
· Score: 2, Informative
Sorry, but as intuitive as it may seem, the moon is NOT a logical jumping-off point for a journey to Mars. Orbital mechanics dictate otherwise. As the original poster said, go check out Zubrin's site, or better yet, read The Case For Mars. Zubrin addresses this misconception.
Anyone who's built a model rocket can show that it's quite possible to build a rocket that IS fundamentally stable. A cardboard tube, a nose cone and some balsa fins does not a "complicated control system" make. It's simply a matter of making sure the CP (center of pressure) is far enough behind the CG (center of gravity). Which, from what I've seen of this guy's designs, he seems to have done.
This page has a decent visual explanation of how one might tack in a spacecraft with a solar sail. The fundamental concept is that the photons are reflected off of the sail, allowing the spacecraft to impart positive or negative delta-v to itself, thus spiralling into higher or lower orbits.
Re:Will not work for interstellar travel. :(
on
How Solar Sails Work
·
· Score: 1
A few comments on this:
1) Consider the possibility of driving similar sails not with solar light but with high-powered Earth-based or orbital lasers.
2) This sail is quite small; just large enough to test the theory. Interplanetary solar sails would require MUCH larger surfaces, and, as you say, much better/lighter materials.
3) All ratios of mass vs. light pressure aside, a solar sail is impractical for interstellar travel because the pressure imparted by the solar wind ceases at the heliopause (by definition, the boundary between our solar system and interstellar space), where solar particles form a shock wave as our solar system moves through interstellar dust. Pioneer 10 and both Voyager 1 and 2 are believed to be approaching the heliopause.
A former co-worker of mine had many... interesting hobbies, one of which was experimentation with extremely high voltage. One of his favorite pasttimes was placing AOL CDs on a piece of plywood, firing up his homebuilt 75,000V generator, flipping down his welding mask, and touching the contacts from the generator to opposing points on the CDs. The end result (after massive flashing, arcing, and a generally putrid stench) were fascinating lightning-like patterns etched through the data layer of the CD where the metal foil had vaporized in its attempt to conduct the electrical currents.
My fault. Just looked at RussianSpace and confirmed that Vladimir Komarov died in 1967 when the first Soyuz spacecraft he was flying hit the ground much too hard. This NASA page confirms that Georgi Timofeyevich Dobrovolskiy, Vladislav Nikolayevich Volkov, and Viktor Ivanovich Patsayev (the crew of Soyuz 11) died of suffocation on rentry after undocking from Salyut 1. However, Apollo 11 (with 3 astronauts) had already landed on the the moon when Soyuz 11 launched in 1971, so it wasn't an attempt to beat the Americans to putting 3 men in space simultaneously.
Even more interesting, however, is a page I just found describing the fates of a number of "unnamed cosmonauts" early in the Soviet Space program. According to the author, James Oberg, the Soviets "lost" cosmonauts routinely, and many rumors circulated in Western circles about these mens' fate. It's a fascinating article, detailing Stalinistic photographic doctoring, and most interestingly a fatality in a Soviet high altitude simulation chamber which bears a grisly resemblance to the 1967 Apollo 1 fire, but which occured in 1961!
You've got far far to much to worry about in those 4 minutes of liftoff to add a large container of combustables to that cargo bay. Better to design a resupply ship and send up all the feul without people being anywhere close to it.
Do you really think that the amount of fuel on board a space tug that can fit into the Shuttle cargo bay is at all consequential compared to the 102,619 pounds of liquid H2 and 1,359,142 pounds of liquid O2 onboard the external tank at liftoff?
However, an unmanned shuttle equivalent is always something that I've thought would be a good idea. One concept that was floated around in the early 80s was the Shuttle-C ("C" for cargo). Also, what about Robert Zubrin's Ares booster idea? The Ares would simply be a cargo section attached to an STS external tank and SRB package with Shuttle main engines strapped to the bottom of the ET.
Don't get me wrong, I believe that the US press has absolutely no idea what they're talking about WRT Russian space technology. They've got more experience, more reliable equipment, and are basically ahead of us in every way other than reusable spacecraft. However...
Just to straighten things out a little... the Zvezda module on the ISS has already had its fuel tanks automatically refilled by the Progress supply craft currently docked on the station, a week before Atlantis made it into orbit.
Also, I'm sure that you don't have your facts straight about the CO2 scrubbing capability of the ISS; the Expedition 1 crew is scheduled to launch October 30 on a Soyuz rocket, so there won't be any Space Shuttle available to provide extra C02 scrubbing ability when they get there.
And, just as a final quip, if "the state of the US space station art hasn't changed since Skylab" then what the hell do you call the multiple tons of ISS equipment in Boeing warehouses ready to be launched?
That's exactly right. The Russians have come closer to loosing people in space than the Americans have: two cosmonauts died on rentry when an external valve failed to close, thus sucking the air out of the capsule. I'm not sure that counts as "in space".
Two things, neither of which you're gonna like very much:
1) Two months ago I, too, dropped my Visor. I called up Handspring: "How much?" And pretty much the exact quote was: "We'd normally charge you $85 for a screen repair, but since our billing system hasn't yet come online, it's free." !!! Gimme that deal! Unfortunately, their billing system has since come online. *sigh*
2) It is rumored that the manufacturer(s) of these LCD touch screens which are O-so-popular for PalmOS devices is/are having major trouble keeping up with orders. Similar to the backlog of FLASHRAM orders the industry is experiencing (which, according to VisorCentral, is a major factor in the delays of all of the Springboard modules we've been waiting for!).
I'm not sure exactly what page on Heavens-Above.com that people are looking at... someone else claims that the ISS isn't visible in Signapore! Here's a little simple rocket science: every satellite's orbit is "inclined" with respect to the equator a certain number of degrees. If you live at a latitude which is less than a satellite's orbital inclination, you're almost guaranteed to be able to see it at some point (I say "almost" because there are a few weird exceptions; however, the ISS is not one of them).
Thusly: The ISS is in a 51.6 degree inclined orbit. Signapore is a maximum of 2 degrees latitude off of the equator. You can't miss the ISS from Signapore. As for Australia, Tazmania is about as far south as the Australian region goes on my map, and that's at 42 degrees south latitude. Still within the visible range.
However... due to the rotation of the earth, the ISS' orbit appears to continuously "shift" across the face of the earth. In Signapore's case, the ISS won't be visible there until September 3, after which it will pass overhead every 90 minutes for about two weeks. Tazmania, on the other hand, can see the ISS beginning just before dawn on August 25 and going for at least two weeks, if not longer.
Ummm... the ISS' orbit is inclined at 51.6 degrees. There's no way you can miss it in Signapore, being just off of the equator. It just so happens, however, that the ISS isn't visible from Signapore right now, simply because the orbital path is constantly "shifting" with respect to the Earth. Wait until September 3, after which it'll pass overhead every 90 minutes for almost two weeks.
This same question showed up in a thread in the "Science" Slashbox earlier. I don't mind that many people don't see these stories; the signal to noise ratio is much better than the rest of Slashdot. However, apparently there are ToDo plans for allowing people to see these stories on the main page as well as in the Slashboxes.
Have you taken a look at the rrlogin program? It was written specifically to solve your kind of dilemma. No one should be forced to use Win98 as a firewall. Try:
This doesn't surprise me in the slightest. Linux is "the next best buzzword" in the industry and, like every new buzzword, many folks haven't the slightest clue what Linux is. Witness "Java", "XML", "Open Source", "CORBA", "COM", etc. The list goes on and on. It seems simply par for the course for a vendor to jump onto the Linux bandwagon by slapping a Penguin sticker on their hardware without a single day of testing. People want Linux because, to the general public, Linux is a brand new bright shiny object. Making something bright and shiny is the second best way to sell that object, next to showing said object alongside copious cleavage and/or smooth bare skin. And bright and shiny only applies to the outside, not the internals. Haul out the Penguin spray paint, Ma, we're joining the Linux crowd!
Apparently there are plenty of maniacs out there who disagree with you: http://atschool.eduweb.co.uk/sbs777/vital/kjv/inde x.html 'Course, being an incorrigible heathen myself, I'm more inclined to take a look at the Jewish Publication Society's version as well; it's just that much more interesting!
If you consider that Jesus was commonly referred to as a rabbi, and was in any case most definitely a Jew, he undoubtedly observed Pesach (Passover) in a ceremony which later evolved into the Seder. If you're gonna reference the Bible, check Luke 2.41-43, Mark 14.12-26, and John 12.12; it's very clear that Jesus observed Pesach. And gee, check these quotes, which explain exactly what one must do to observe Pesach:
"And they shall eat the flesh in that night, roast with fire, and unleavened bread; and with bitter herbs they shall eat it." (Exodus 12.8)
"And you shall eat of it [the roasted lamb] this way, with your loins girded, your sandals on your feet, and your staff in your hand. And you shall eat it in a hurry. It is the LORD's Passover." (Exodus 12.11)
Sounds really vegetarian to me, yeah, sure. Note also that not only must they eat the lamb, but that they had to kill a lamb purchased 4 days earlier, then spread that lamb's blood on the doorframe of their houses, and then eat the flesh!
I know a lot of strict vegetarians who do exactly this every year. It's completely ethical behavior, because God told me so.
The important difference between what NASA is doing and what Zubrin did for The Case For Mars is this: NASA's prototype is miniaturized for inclusion on an actual Mars lander. Zubrin's prototype was rather large and was simply intended to demonstrate the feasibility of "In-Situ Propellant Production (ISPP)." Zubrin's prototype was never meant to actually go to Mars. NASA's apparatus may do just that.
ISPP is the single most critical technology to his proposed "Mars Direct" plan. Mars Direct outlines a plan that would allow the US to land a 4-man mission on Mars with existing technologies within 10 years and for a budget conservatively estimated at less than US$55bil (only 1/10 of NASA's current annual budget).
The fact that NASA is investigating this technology with an eye to sending a prototype to Mars should be cause for jubilation, not scoffing. It's a sign that the entrenched "old boys network" in NASA can occasionally see merit in ideas which are not their own.
BTW, the intent of this machine is NOT (let me repeat, NOT) to test processes to terraform Mars. It's simply not practical to send all the breathable oxygen a Mars expeditionary force requires from Earth. Imagine if Lewis and Clark carried all of the water they needed with them! The production of oxygen from the atmosphere of Mars would allow future explorers to live off the land, drastically increasing the size of the scientific payload which can be sent to Mars along with them (because you no longer need to carry all of your oxygen!). Conversely, this technology drastically reduces the required lifting capacity of the launch vehicle, thus drastically reducing the cost of the mission (anyone have any idea how much more a Saturn V class rocket costs than, say, a Titan IV?!?).
Before you walk you've gotta crawl. Stop thinking "Will this machine terraform Mars?" and start thinking "If I were standing on Mars in a spacesuit right now, where would I get the oxygen I need to fill my spacesuit?"
I purchased an iOpener from Circuit City on 3/12. On 4/29 CC called me to ask "How is your new computer working out?" "Uhhhh.... I'd be in a better position to tell you if I actually HAD IT!" "Oh. Well, it's here for you to pick up." Arghh!
The moral of the story is: Circuit City will not, in all likelyhood, EVER call you to tell you that your machines are in. I'm amazed that in my case they had the "courtesy" to make what they thought was a preemptive service call.
As a side note, I personally feel that Kalin Harvey's article is right on the mark. While I refuse to become personally outraged by the behavior of many of Slashdot's denziens towards Netpliance (not to mention the unforgivable and completely unintelligent arrogance of many of the regulars on Ken Segler's iOpener BBS), I firmly disagree with the thought that Netpliance is "screwing the hacker/open source community". They've got a specific business model (a very good one IMHO) and it specifically doesn't include providing the world's cheapest X terminals to self-righteous geeks. I've never seen a community more quick to cry "Fuck the bozos! Why isn't the Man doing something about this?!?" when a free lunch turns out to be less than the golden goose with the singing harp thrown in for good measure. The only faults I find with Netpliance's behavior are a lack of foresight ("Do not underestimate the power of the Dark Geek") and a willingness to act rashly out of corporate panic (epoxy? clipping IDE header pins? Retroactive service contracts? PLEASE.). However, many of Netpliance's critics suffer the same general failures.
I count myself lucky to have gotten an iOpener at all, and would gladly have tipped my hat in salute to Netpliance had they successfully prevented me from causing them to loose another ~$200.
In the Development Zone area of Palm Computing's web site, they have a pinout diagram of the Palm's serial port. More importantly, however, if you register as an independent Palm Solutions Provider with Palm (registration is FREE), one of the many things Palm provides is a list of hardware vendors which sell serial port connectors and modem casings which will fit various Palm devices. In addition, Handspring, which makes the PalmOS-based Visor, provides mechanical information on all of their products, including suggested dimensions for both standard and expanded SpringBoard modules. They also provide a list of recommended vendors for SpringBoard module casings.
Slashdot Mirror
Absolutely incorrect, at least in PuTTY's case. I use public key authentication via PuTTY a dozen or more times every day.
I can't speak for TeraTermPro, I haven't ever used it.
Sorry, but as intuitive as it may seem, the moon is NOT a logical jumping-off point for a journey to Mars. Orbital mechanics dictate otherwise. As the original poster said, go check out Zubrin's site, or better yet, read The Case For Mars. Zubrin addresses this misconception.
Anyone who's built a model rocket can show that it's quite possible to build a rocket that IS fundamentally stable. A cardboard tube, a nose cone and some balsa fins does not a "complicated control system" make. It's simply a matter of making sure the CP (center of pressure) is far enough behind the CG (center of gravity). Which, from what I've seen of this guy's designs, he seems to have done.
An Editorial on the CT Anti-Video-Game Bill
State Sen. Toni Harp
Secret Service Report
This page has a decent visual explanation of how one might tack in a spacecraft with a solar sail. The fundamental concept is that the photons are reflected off of the sail, allowing the spacecraft to impart positive or negative delta-v to itself, thus spiralling into higher or lower orbits.
1) Consider the possibility of driving similar sails not with solar light but with high-powered Earth-based or orbital lasers.
2) This sail is quite small; just large enough to test the theory. Interplanetary solar sails would require MUCH larger surfaces, and, as you say, much better/lighter materials.
3) All ratios of mass vs. light pressure aside, a solar sail is impractical for interstellar travel because the pressure imparted by the solar wind ceases at the heliopause (by definition, the boundary between our solar system and interstellar space), where solar particles form a shock wave as our solar system moves through interstellar dust. Pioneer 10 and both Voyager 1 and 2 are believed to be approaching the heliopause.
A former co-worker of mine had many... interesting hobbies, one of which was experimentation with extremely high voltage. One of his favorite pasttimes was placing AOL CDs on a piece of plywood, firing up his homebuilt 75,000V generator, flipping down his welding mask, and touching the contacts from the generator to opposing points on the CDs. The end result (after massive flashing, arcing, and a generally putrid stench) were fascinating lightning-like patterns etched through the data layer of the CD where the metal foil had vaporized in its attempt to conduct the electrical currents.
My fault. Just looked at RussianSpace and confirmed that Vladimir Komarov died in 1967 when the first Soyuz spacecraft he was flying hit the ground much too hard. This NASA page confirms that Georgi Timofeyevich Dobrovolskiy, Vladislav Nikolayevich Volkov, and Viktor Ivanovich Patsayev (the crew of Soyuz 11) died of suffocation on rentry after undocking from Salyut 1. However, Apollo 11 (with 3 astronauts) had already landed on the the moon when Soyuz 11 launched in 1971, so it wasn't an attempt to beat the Americans to putting 3 men in space simultaneously.
Even more interesting, however, is a page I just found describing the fates of a number of "unnamed cosmonauts" early in the Soviet Space program. According to the author, James Oberg, the Soviets "lost" cosmonauts routinely, and many rumors circulated in Western circles about these mens' fate. It's a fascinating article, detailing Stalinistic photographic doctoring, and most interestingly a fatality in a Soviet high altitude simulation chamber which bears a grisly resemblance to the 1967 Apollo 1 fire, but which occured in 1961!
You've got far far to much to worry about in those 4 minutes of liftoff to add a large container of combustables to that cargo bay. Better to design a resupply ship and send up all the feul without people being anywhere close to it.
Do you really think that the amount of fuel on board a space tug that can fit into the Shuttle cargo bay is at all consequential compared to the 102,619 pounds of liquid H2 and 1,359,142 pounds of liquid O2 onboard the external tank at liftoff?
However, an unmanned shuttle equivalent is always something that I've thought would be a good idea. One concept that was floated around in the early 80s was the Shuttle-C ("C" for cargo). Also, what about Robert Zubrin's Ares booster idea? The Ares would simply be a cargo section attached to an STS external tank and SRB package with Shuttle main engines strapped to the bottom of the ET.
Don't get me wrong, I believe that the US press has absolutely no idea what they're talking about WRT Russian space technology. They've got more experience, more reliable equipment, and are basically ahead of us in every way other than reusable spacecraft. However...
Just to straighten things out a little... the Zvezda module on the ISS has already had its fuel tanks automatically refilled by the Progress supply craft currently docked on the station, a week before Atlantis made it into orbit.
Also, I'm sure that you don't have your facts straight about the CO2 scrubbing capability of the ISS; the Expedition 1 crew is scheduled to launch October 30 on a Soyuz rocket, so there won't be any Space Shuttle available to provide extra C02 scrubbing ability when they get there.
And, just as a final quip, if "the state of the US space station art hasn't changed since Skylab" then what the hell do you call the multiple tons of ISS equipment in Boeing warehouses ready to be launched?
That's exactly right. The Russians have come closer to loosing people in space than the Americans have: two cosmonauts died on rentry when an external valve failed to close, thus sucking the air out of the capsule. I'm not sure that counts as "in space".
1) Two months ago I, too, dropped my Visor. I called up Handspring: "How much?" And pretty much the exact quote was: "We'd normally charge you $85 for a screen repair, but since our billing system hasn't yet come online, it's free." !!! Gimme that deal! Unfortunately, their billing system has since come online. *sigh*
2) It is rumored that the manufacturer(s) of these LCD touch screens which are O-so-popular for PalmOS devices is/are having major trouble keeping up with orders. Similar to the backlog of FLASHRAM orders the industry is experiencing (which, according to VisorCentral, is a major factor in the delays of all of the Springboard modules we've been waiting for!).
Sorry for the bad news.
Thusly: The ISS is in a 51.6 degree inclined orbit. Signapore is a maximum of 2 degrees latitude off of the equator. You can't miss the ISS from Signapore. As for Australia, Tazmania is about as far south as the Australian region goes on my map, and that's at 42 degrees south latitude. Still within the visible range.
However... due to the rotation of the earth, the ISS' orbit appears to continuously "shift" across the face of the earth. In Signapore's case, the ISS won't be visible there until September 3, after which it will pass overhead every 90 minutes for about two weeks. Tazmania, on the other hand, can see the ISS beginning just before dawn on August 25 and going for at least two weeks, if not longer.
Here's a URL.
Patience, grasshopper.
This same question showed up in a thread in the "Science" Slashbox earlier. I don't mind that many people don't see these stories; the signal to noise ratio is much better than the rest of Slashdot. However, apparently there are ToDo plans for allowing people to see these stories on the main page as well as in the Slashboxes.
It's fake. Check out TheForce.net.
http://people.qualcomm.com/karn/rr/linux.html
Good luck.
This doesn't surprise me in the slightest. Linux is "the next best buzzword" in the industry and, like every new buzzword, many folks haven't the slightest clue what Linux is. Witness "Java", "XML", "Open Source", "CORBA", "COM", etc. The list goes on and on. It seems simply par for the course for a vendor to jump onto the Linux bandwagon by slapping a Penguin sticker on their hardware without a single day of testing. People want Linux because, to the general public, Linux is a brand new bright shiny object. Making something bright and shiny is the second best way to sell that object, next to showing said object alongside copious cleavage and/or smooth bare skin. And bright and shiny only applies to the outside, not the internals. Haul out the Penguin spray paint, Ma, we're joining the Linux crowd!
Apparently there are plenty of maniacs out there who disagree with you: http://atschool.eduweb.co.uk/sbs777/vital/kjv/inde x.html 'Course, being an incorrigible heathen myself, I'm more inclined to take a look at the Jewish Publication Society's version as well; it's just that much more interesting!
SeaLaunch is currently operational, even if they've had a hiccup or two.
"And they shall eat the flesh in that night, roast with fire, and unleavened bread; and with bitter herbs they shall eat it." (Exodus 12.8)
"And you shall eat of it [the roasted lamb] this way, with your loins girded, your sandals on your feet, and your staff in your hand. And you shall eat it in a hurry. It is the LORD's Passover." (Exodus 12.11)
Sounds really vegetarian to me, yeah, sure. Note also that not only must they eat the lamb, but that they had to kill a lamb purchased 4 days earlier, then spread that lamb's blood on the doorframe of their houses, and then eat the flesh!
I know a lot of strict vegetarians who do exactly this every year. It's completely ethical behavior, because God told me so.
ISPP is the single most critical technology to his proposed "Mars Direct" plan. Mars Direct outlines a plan that would allow the US to land a 4-man mission on Mars with existing technologies within 10 years and for a budget conservatively estimated at less than US$55bil (only 1/10 of NASA's current annual budget).
The fact that NASA is investigating this technology with an eye to sending a prototype to Mars should be cause for jubilation, not scoffing. It's a sign that the entrenched "old boys network" in NASA can occasionally see merit in ideas which are not their own.
BTW, the intent of this machine is NOT (let me repeat, NOT) to test processes to terraform Mars. It's simply not practical to send all the breathable oxygen a Mars expeditionary force requires from Earth. Imagine if Lewis and Clark carried all of the water they needed with them! The production of oxygen from the atmosphere of Mars would allow future explorers to live off the land, drastically increasing the size of the scientific payload which can be sent to Mars along with them (because you no longer need to carry all of your oxygen!). Conversely, this technology drastically reduces the required lifting capacity of the launch vehicle, thus drastically reducing the cost of the mission (anyone have any idea how much more a Saturn V class rocket costs than, say, a Titan IV?!?).
Before you walk you've gotta crawl. Stop thinking "Will this machine terraform Mars?" and start thinking "If I were standing on Mars in a spacesuit right now, where would I get the oxygen I need to fill my spacesuit?"
The moral of the story is: Circuit City will not, in all likelyhood, EVER call you to tell you that your machines are in. I'm amazed that in my case they had the "courtesy" to make what they thought was a preemptive service call.
As a side note, I personally feel that Kalin Harvey's article is right on the mark. While I refuse to become personally outraged by the behavior of many of Slashdot's denziens towards Netpliance (not to mention the unforgivable and completely unintelligent arrogance of many of the regulars on Ken Segler's iOpener BBS), I firmly disagree with the thought that Netpliance is "screwing the hacker/open source community". They've got a specific business model (a very good one IMHO) and it specifically doesn't include providing the world's cheapest X terminals to self-righteous geeks. I've never seen a community more quick to cry "Fuck the bozos! Why isn't the Man doing something about this?!?" when a free lunch turns out to be less than the golden goose with the singing harp thrown in for good measure. The only faults I find with Netpliance's behavior are a lack of foresight ("Do not underestimate the power of the Dark Geek") and a willingness to act rashly out of corporate panic (epoxy? clipping IDE header pins? Retroactive service contracts? PLEASE.). However, many of Netpliance's critics suffer the same general failures.
I count myself lucky to have gotten an iOpener at all, and would gladly have tipped my hat in salute to Netpliance had they successfully prevented me from causing them to loose another ~$200.
You're referring to an ongoing USAF project called the Airborne Laser (ABL). Contractors include Boeing, TRW, and Lockheed Martin.
In the Development Zone area of Palm Computing's web site, they have a pinout diagram of the Palm's serial port. More importantly, however, if you register as an independent Palm Solutions Provider with Palm (registration is FREE), one of the many things Palm provides is a list of hardware vendors which sell serial port connectors and modem casings which will fit various Palm devices. In addition, Handspring, which makes the PalmOS-based Visor, provides mechanical information on all of their products, including suggested dimensions for both standard and expanded SpringBoard modules. They also provide a list of recommended vendors for SpringBoard module casings.