I knew I shouldn't get the patch from that woman...:)
and on another note, prostitution is not illeagal in israel, but women-slavery (yes, thats SLAVERY, including kidnapping, being raped serially ten times a day, beating and sometimes murder) certainly is.
but like you said, the police is streched out as it is trying to protect us from those maniacs exploding in our streets, it usually doesn't have enough time to handle women-slavery.
Re:hard part; not so; air may be transparent
on
Battlefield Lasers
·
· Score: 1
what do you mean by 0.1% absorption ? over what distance ? if 0.1% is absorbed over say, a 10 kilometer long beam will this be enough ?
in other words, what are the cross sections, lengths and radiation density involved ?
Re:hard part; not so; air may be transparent
on
Battlefield Lasers
·
· Score: 1
actually, for the laser to be efficient, it MUST
emit light which is hardly ever absorped in air.
therefore, no superheating of air...
I've read the article and except for a dim refference to subatomic physics , and then other references to just about all the branches of science there's nothing worthwile (specific) in this crappy article.
what are the scientists proposing (and who are "they" anyhow ?) is this to be a neutrino detector ? other experiment shielded from cosmic rays ? what are the theories tested ? why will this be a better experiment than others ?
Or is this just a sophisticated case of an
"for sale; used mine" add ?
IAN an Aircraft Engineer but IIRC, for high energy density you need to store the hydrogen gas at very high pressures (a gas at the density of a liquid), which causes an immediate explosion once you have any sort of crack.
This is not so in other fuels, which are liquids and so are very dense at normal atmospheric pressure. A leak in such a container is still dangerous, but after some time, when fuel vapours ignite.
Oh, and BTW, for an aeroplane you need much higher MTBF (Mean Time Between Failure) than for a space mission; there are a lot more air flights than space ones.
why? because you switch from an exponential time brute-force method to an exponential cpu-number brute force method.
and practically, there's a limit to the number of molecules you can use.
so the issue is not CS one: it means you have a much higher n in which the problem starts being impracticle.
e.g. you will probably need a cipher the size of a DNA molecule for your future PGP (no, wankers of the world, your own is not good enough, since 99% is like any othres':) )
You've said it yourself: CHRISTIAN killers, not jewish.
and in a land torn by a bloddy civil war, where every step could be your end, mistakes in judgement are a common thing.
The CAHAN inquery commity (which gave the recomendations about Sharon.) NEVER hinted this was an israelly crime of war, only that it was done under our ADMINISTRATIVE responsibility. i.e. once we conquered the area, we are responsible. You may not know, conquering and controlling are completely different things; there are many examples of actions done under a so-called "conquered" teritory which the conquerer did not approve of.
this is not a great chapter of israelly history, but , somehow, it is allways being highlighted as opposed to much "smaller-scale" events , the holocaust, say, or the armenien holocaust (where MUSLIM turks did a genocide on the armenians)
the fact you mention only a small-scale, controversial event from one side and fail to compare it to large-scale intentional ones from others is a great example of double standards.
".. Pulsed laser experiments experiments involve using arrays of uber lasers to heat and compress solid hydrogen pellets.."
actually you mean ICF (inertially confined fusion), and recent reserch is not on uber-lasers, but on ion beams, which pack a much stronger punch, but are harder to focus (in time and place)
another opportunity is using hohlraum (hope I spelled this right;> ) i.e. shell-radiation: from an initial Z-pinch X-ray source in a spherical chamber that focuses the X-ray on the fuel pellet.
this is akin to what happens in the usual H-bomb, save for the X-source.
My guess this is an AC troll, but on the off chance it isn't:
1) what about instability of the plasma configuaration? what IS the exact plasma configuration and how long do you maintain it ?
2) what is the cross section of p-boron ->boron 12 reaction (IIRC this should be oom e^-11 of d-t, i.e. 1000 to 10000 smaller than d-t)
3) links, articles, anything ???
NO: Join forces with an existing nonprofit org:
on
Slashdot in Politics?
·
· Score: 1
I don't know what the american equivalent is, but in israel we have some nonprofit, non-govermental organizations ("AMUTUT") helping the poor, lobyying for education, etc.
try to get the EFF to join forces with one of these:
e.g., make a volunteer effort to incorporate linux in schools, teach programming and/or creating profesional libraries for the poor, etc.
You cannot fight the rich people's lobbies 'on their own playground': they are professionals, they'll eat you like a snack.
but if you join an existing movement, with it's politically savvy and dedicated people, and work from bellow (i.e. actually contibute to the welfare of common people in a way they can recognize.) you may have a chance to influence your society (look at SHAS in israel.)
"... if you're not using linux because you A)want to try out new things and B)want to get into the guts of an OS, then you're probably safer with windows and AOL anyway... "
what is this , a mega troll ?
what about all the scientists, all the non-OS programers and other "simple users" (whose work may be more complex than OS development, an important task by itself.)
yes, there are a few people actually USING the OS instead of developing it, or talking about it.
this kind of attitude just encourages computer illiteracy, it is the "I'm the hardware wizard and you the little non-sys-admin lizards are unworthy of linux" approach which helped unix so well in the past.
oh, and by the way: yes, most linux users are technical personas by nature (I am). I thought expanding the user base from this (pseudo ?) elite is one of the goals of the linux software R&D
-- this rant is not intended to be personal, it is against a social trend.
new technologies.
every new generation of these beasts creates (and solves) incredibly hard scientific and engineering problems.
it has been said that building of the proton-proton accelerator in cern is the technology equivalent of 10 space shuttle missions.
accelerator technology overcomes the following engineering problems (that I know of): hard vacuum exposure (over years) of both superconducting magnets and very sensitive detectors in incredible amounts (kilometers), very high radiation exposure of above devices and materials (one of the problems fusion tech still has to face, BTW) and (for CS people:) filtering and clustering enourmous amounts of data.
plus, there's the computer simulations of above structures , reliability and perfomance analysis etc., etc.
in real-life terms: such incredible effort by at least tens of thousands of very smart people trying to overcome new problems must bring a side benefits (look e.g. at space program.)
just wailing about the big bad corporations trying to mind-control the next generation will get you nowhere.
actually discussing various IP issues may be very good in making kids understand it's a complex world out there, and it does affect them, so education by itself is not automatically bad.
Not only corporations have something to gain or lose: the common (or uncommon) citizen also does: make sure such oppinions gets into the curriculum.
if you do, perhaps in 10-20 years our chilren will fix our mistakes.
the main problem is of calculating the force on every star at every iteration.
the problem was thought to be quadratic , but a decade ago was shown to be linear (by a PhD student named greengard) using spherical harmonics expansions.
a very nice layman's introduction is at:
http://www.amara.com/papers/nbody.html
there are other sources linked there as well.
keywords:
N-body problem
Barnes-Hut algorithm
Fast Multipole Method (FMM)
BTW I wonder what method they used, my guess is that at 10^8 stars an adaptive FMM variant is fastest.
..." but I believe that "gray goo" fantasies are as far removed from reality as artificial intelligence or cold fusion...."
these are 3 completely different things with completely different reasons for lack of success:
"artificial inteligence" is a general term for a wide range of problems: from those completely ill-defined (a software that has the mental flexibility of a human) to very specific , well defined problems (chess... ) it is simply impossible to discuss all of them under the same roof.
"nanotechnology" also has a wide range of problems, and some of them appear to be very close to sollution: e.g. replacing usuall building material with CNTs or INTs is not that far fetched. However building a "nanobot" - something with the functionality of a cell, or at least a virus - seems very much in the future.
"cold fusion" , by contrast , is a very well defined problem: "produce energy from fusion reactions in an economic fashion", it is still unsuccessful because the plasmas in question are very much in non-linear domains , and physicists still cannot really deal very well with non-linear (and non-equilibrium) phenomena, despite many efforts, we haven't develloped satisfactory theoretic tools (yet ?).
put in other words, these are completely different issues : theoretically, experimentally and even socially.
first, MABRUK for a very nice looking case
what about heat conductance ? wood is a good insualtor, I would guess this case is actually a very BAD engineering solution.
not to say that hardware can't be aesthetic.
What do you want, Cosa-Nostra-Pizza delivery schedule ?
It would surprize me greatly if there were assembly lines for this: specialized equipment usually take time to contract, order , build and QA , QA, and QA again.
if you want to rant, at least give the time-scale for equivalent tasks, say in industry or in other research facilities, then compare.
most science is NOT done by computers, but by smart people , who use whatever mental or physical tools at their disposal (and computers are only a small part, by no means the best or even most important one of these tools)
"The purpose of comupting is insight, not numbers" , and filtering insights is still mostly a human task.
actually that may not be that far fetched (as opposed with all this futuristic discussion...)
CNTs have very little defects , IIRC this is because they are a very steep energy local minima, or , put other words, once you have the start of an CNT, and heat it to 2000 degrees, it will reject other atoms for carbon in the right configuration (repair itself) (providing this is a single-walled NT, for multi-walled NTs the above/below layers limit this greatly)
so, I would guess heating an area of such a bundle to ~2000 K may even have a healing affect.
of course you need to take the large heat conductance into effect.
-- just a guess...
hand writing recognition (my hope and desire: including math, but no need for actual office)
speech recognition + voice commands
eyes-movement recognition
combine all these with a message board
these new technologies were all discussed at/. at one time or another, and will be real time savers (note I don't know at what state they are now)
so, there's a lot yet to do in making the office easier and better.
that calculation is correct as far as brain goes, actually IIRC the bigger danger is for the eyes, which protein can coagulate (like egg's white), taking that into account and you're ~1-2 OOM safe, not 6.
Slashdot Mirror
software PROSTITUTION ?
... :)
I knew I shouldn't get the patch from that woman
and on another note, prostitution is not illeagal in israel, but women-slavery (yes, thats SLAVERY, including kidnapping, being raped serially ten times a day, beating and sometimes murder) certainly is.
but like you said, the police is streched out as it is trying to protect us from those maniacs exploding in our streets, it usually doesn't have enough time to handle women-slavery.
what do you mean by 0.1% absorption ? over what distance ? if 0.1% is absorbed over say, a 10 kilometer long beam will this be enough ?
in other words, what are the cross sections, lengths and radiation density involved ?
actually, for the laser to be efficient, it MUST
emit light which is hardly ever absorped in air.
therefore, no superheating of air...
I've read the series many times, though a long
time ago, and do not remember a claim about
pigmentation.
please give refference when using such claims.
(my guess, fremen are based on bedouin, which are levantine, not exactly black, but darker then europeans.)
anyway, why are you so excited about this ?
I've read the article and except for a dim refference to subatomic physics , and then other references to just about all the branches of science there's nothing worthwile (specific) in this crappy article.
what are the scientists proposing (and who are "they" anyhow ?) is this to be a neutrino detector ? other experiment shielded from cosmic rays ? what are the theories tested ? why will this be a better experiment than others ?
Or is this just a sophisticated case of an
"for sale; used mine" add ?
IAN an Aircraft Engineer but IIRC, for high energy density you need to store the hydrogen gas at very high pressures (a gas at the density of a liquid), which causes an immediate explosion once you have any sort of crack.
This is not so in other fuels, which are liquids and so are very dense at normal atmospheric pressure. A leak in such a container is still dangerous, but after some time, when fuel vapours ignite.
Oh, and BTW, for an aeroplane you need much higher MTBF (Mean Time Between Failure) than for a space mission; there are a lot more air flights than space ones.
from a CS perspective, this does NOT solve NP.
:) )
why? because you switch from an exponential time brute-force method to an exponential cpu-number brute force method.
and practically, there's a limit to the number of molecules you can use.
so the issue is not CS one: it means you have a much higher n in which the problem starts being impracticle.
e.g. you will probably need a cipher the size of a DNA molecule for your future PGP (no, wankers of the world, your own is not good enough, since 99% is like any othres'
You've said it yourself: CHRISTIAN killers, not jewish.
and in a land torn by a bloddy civil war, where every step could be your end, mistakes in judgement are a common thing.
The CAHAN inquery commity (which gave the recomendations about Sharon.) NEVER hinted this was an israelly crime of war, only that it was done under our ADMINISTRATIVE responsibility. i.e. once we conquered the area, we are responsible. You may not know, conquering and controlling are completely different things; there are many examples of actions done under a so-called "conquered" teritory which the conquerer did not approve of.
this is not a great chapter of israelly history, but , somehow, it is allways being highlighted as opposed to much "smaller-scale" events , the holocaust, say, or the armenien holocaust (where MUSLIM turks did a genocide on the armenians)
the fact you mention only a small-scale, controversial event from one side and fail to compare it to large-scale intentional ones from others is a great example of double standards.
".. Pulsed laser experiments experiments involve using arrays of uber lasers to heat and compress solid hydrogen pellets.."
;> ) i.e. shell-radiation: from an initial Z-pinch X-ray source in a spherical chamber that focuses the X-ray on the fuel pellet.
actually you mean ICF (inertially confined fusion), and recent reserch is not on uber-lasers, but on ion beams, which pack a much stronger punch, but are harder to focus (in time and place)
another opportunity is using hohlraum (hope I spelled this right
this is akin to what happens in the usual H-bomb, save for the X-source.
My guess this is an AC troll, but on the off chance it isn't:
1) what about instability of the plasma configuaration? what IS the exact plasma configuration and how long do you maintain it ?
2) what is the cross section of p-boron ->boron 12 reaction (IIRC this should be oom e^-11 of d-t, i.e. 1000 to 10000 smaller than d-t)
3) links, articles, anything ???
I don't know what the american equivalent is, but in israel we have some nonprofit, non-govermental organizations ("AMUTUT") helping the poor, lobyying for education, etc.
try to get the EFF to join forces with one of these:
e.g., make a volunteer effort to incorporate linux in schools, teach programming and/or creating profesional libraries for the poor, etc.
You cannot fight the rich people's lobbies 'on their own playground': they are professionals, they'll eat you like a snack.
but if you join an existing movement, with it's politically savvy and dedicated people, and work from bellow (i.e. actually contibute to the welfare of common people in a way they can recognize.) you may have a chance to influence your society (look at SHAS in israel.)
"... if you're not using linux because you A)want to try out new things and B)want to get into the guts of an OS, then you're probably safer with windows and AOL anyway... "
what is this , a mega troll ?
what about all the scientists, all the non-OS programers and other "simple users" (whose work may be more complex than OS development, an important task by itself.)
yes, there are a few people actually USING the OS instead of developing it, or talking about it.
this kind of attitude just encourages computer illiteracy, it is the "I'm the hardware wizard and you the little non-sys-admin lizards are unworthy of linux" approach which helped unix so well in the past.
oh, and by the way: yes, most linux users are technical personas by nature (I am). I thought expanding the user base from this (pseudo ?) elite is one of the goals of the linux software R&D
-- this rant is not intended to be personal, it is against a social trend.
new technologies.
every new generation of these beasts creates (and solves) incredibly hard scientific and engineering problems.
it has been said that building of the proton-proton accelerator in cern is the technology equivalent of 10 space shuttle missions.
accelerator technology overcomes the following engineering problems (that I know of): hard vacuum exposure (over years) of both superconducting magnets and very sensitive detectors in incredible amounts (kilometers), very high radiation exposure of above devices and materials (one of the problems fusion tech still has to face, BTW) and (for CS people:) filtering and clustering enourmous amounts of data.
plus, there's the computer simulations of above structures , reliability and perfomance analysis etc., etc.
in real-life terms: such incredible effort by at least tens of thousands of very smart people trying to overcome new problems must bring a side benefits (look e.g. at space program.)
just wailing about the big bad corporations trying to mind-control the next generation will get you nowhere.
actually discussing various IP issues may be very good in making kids understand it's a complex world out there, and it does affect them, so education by itself is not automatically bad.
Not only corporations have something to gain or lose: the common (or uncommon) citizen also does: make sure such oppinions gets into the curriculum.
if you do, perhaps in 10-20 years our chilren will fix our mistakes.
solving the ODE's is done numerically.
the main problem is of calculating the force on every star at every iteration.
the problem was thought to be quadratic , but a decade ago was shown to be linear (by a PhD student named greengard) using spherical harmonics expansions.
a very nice layman's introduction is at:
http://www.amara.com/papers/nbody.html
there are other sources linked there as well.
keywords:
N-body problem
Barnes-Hut algorithm
Fast Multipole Method (FMM)
BTW I wonder what method they used, my guess is that at 10^8 stars an adaptive FMM variant is fastest.
..." but I believe that "gray goo" fantasies are as far removed from reality as artificial intelligence or cold fusion. ..."
... ) it is simply impossible to discuss all of them under the same roof.
these are 3 completely different things with completely different reasons for lack of success:
"artificial inteligence" is a general term for a wide range of problems: from those completely ill-defined (a software that has the mental flexibility of a human) to very specific , well defined problems (chess
"nanotechnology" also has a wide range of problems, and some of them appear to be very close to sollution: e.g. replacing usuall building material with CNTs or INTs is not that far fetched. However building a "nanobot" - something with the functionality of a cell, or at least a virus - seems very much in the future.
"cold fusion" , by contrast , is a very well defined problem: "produce energy from fusion reactions in an economic fashion", it is still unsuccessful because the plasmas in question are very much in non-linear domains , and physicists still cannot really deal very well with non-linear (and non-equilibrium) phenomena, despite many efforts, we haven't develloped satisfactory theoretic tools (yet ?).
put in other words, these are completely different issues : theoretically, experimentally and even socially.
first, MABRUK for a very nice looking case
what about heat conductance ? wood is a good insualtor, I would guess this case is actually a very BAD engineering solution.
not to say that hardware can't be aesthetic.
What do you want, Cosa-Nostra-Pizza delivery schedule ?
It would surprize me greatly if there were assembly lines for this: specialized equipment usually take time to contract, order , build and QA , QA, and QA again.
if you want to rant, at least give the time-scale for equivalent tasks, say in industry or in other research facilities, then compare.
most science is NOT done by computers, but by smart people , who use whatever mental or physical tools at their disposal (and computers are only a small part, by no means the best or even most important one of these tools)
"The purpose of comupting is insight, not numbers" , and filtering insights is still mostly a human task.
actually that may not be that far fetched (as opposed with all this futuristic discussion...) ...
CNTs have very little defects , IIRC this is because they are a very steep energy local minima, or , put other words, once you have the start of an CNT, and heat it to 2000 degrees, it will reject other atoms for carbon in the right configuration (repair itself) (providing this is a single-walled NT, for multi-walled NTs the above/below layers limit this greatly)
so, I would guess heating an area of such a bundle to ~2000 K may even have a healing affect.
of course you need to take the large heat conductance into effect.
-- just a guess
hand writing recognition (my hope and desire: including math, but no need for actual office)
speech recognition + voice commands
eyes-movement recognition
combine all these with a message board
/. at one time or another, and will be real time savers (note I don't know at what state they are now)
so, there's a lot yet to do in making the office easier and better.
these new technologies were all discussed at
that calculation is correct as far as brain goes, actually IIRC the bigger danger is for the eyes, which protein can coagulate (like egg's white), taking that into account and you're ~1-2 OOM safe, not 6.