No, MFLOPS means Million FLoating point Operations Per Second
That has very little to do with Hertz.
well...
1. M in MFLOPS is also often expanded as "Mega", (equivalent to the "Million" you give, but more suited to a scientific unit)
2. anything dimensionless which is measured as "per second" is Hertz. Hertz is cycles (or anything else dimensionless) per second i.e. equivalent to a unit of s^-1.
Another recent survey (reported in this BBC article) suggests that while IT spending in schools aids children in their test results, book spending appears to help more. Twice as much, in fact!
The inquirer also has an article which breaks down the 460 watt PSU requirement by component.
I still want one even if it would up my electricity bill.
Random thought: I hope they don't release these first in California... --
One example is the Seiko kinetic series of watches.
These have a tiny rotational generator inside which charge up a capacitor which is then used
to power the watch during periods of no movement.
The generator can actually be heard if you move the watch near to your ear. I believe that the counterweight's movement is geared up by a very high ratio before the generator mechanism (in fact in the manual it quotes some statistic or other about the generator's rotational speed versus rpm of an F1 engine or similar...)
It only takes a short time of normal wearing before the capacitor is fully charged. --
Solitons (or solitary waves) are non-linear waves which are stable and localised in space (looking for the most part like a bump). They derive their stability and form from the interaction between a non-linear term and andy dissipative terms in the equation.
The Korteweg-de Vries (KdV) equation is a good example
u_{xxx} + 6uu_x + u_t = 0
which describes very similar types of waves (albeit in one dimension). A selection of the solutions can be found here.
I guess that the reason for the quoted "devastating effects" is that solitons are comparatively stable waveforms, which are much less prone to dissipation and dispersion than smaller waves which remain within the regime where the real equations of motion of the water are close enough to the linear wave equation. Soliton waves can travel long distances in relatively unchanged form (and hence still carry all of their initial energy when they finally do hit the coastline).
One of the first recorded experimental observations of a soliton was a bow wave of a boat that John Scott Russell followed for several miles on horseback before losing it in the twists and turns of the canal somewhere near Edinburgh, Scotland. IIRC solitary waves under these conditions do behave somewhat like the KdV solutions.
I get mine from J. Sheridan Le Fanu, an Irish
writer of (amongst other things) horror stories
from Victorian times. His story "Carmilla" was
one of Bram Stoker's inspirations for "Dracula".
(In fact the copy of "Dracula" that I have quotes
a chapter that Stoker decided to leave out of
the book which describes the grave of a Stygian
countess called Carmilla)
I had just finished reading a collection of his
stories when I first registered on an internet
chess server back in 1990 or thereabouts and
so chose it as a nick.
--
And of course, I get
invited to come over to family members'
houses to help them fix/setup/etc. their PCs.
This being/., I'm sure most of us have had to
do this at some point...
A friend of mine (a mathematician who moved into neural networks and is now a computer vision researcher)
once described a neighbour asking something along
the lines of "Oh, you do maths. You must be clever. Can you fix my Hoover?" --
The First Law of Thermodynamics:-
Heat is work and work is heat ...
The Second Law of Thermodynamics:-
Heat cannot of itself pass from one body to a hotter body
sorry - no explicit mention of the third law. (But some gems such as
Heat is work and work's a curse
And all the heat in the universe
Is gonna cool down,
'Cos it can't increase
Then there'll be no more work
And there'll be perfect peace
)
At the risk of drifting even further off-topic, they also have a great Gnu song
I'm a Gnu
I'm a Gnu
The g-nicest work of g-nature in the zoo
(Also offtopic, but in response to "Semi-Offtopic";-)
XMMS, I guess in order to be completely skinnable, is an overrideredirect window, meaning one that the window manager will not add decoration to (or in any other way manage the window). This has the effect of making the window "sticky" (i.e. it will appear on all virtual desktops.), since the WM won't hide it when you switch to a different desktop. (This probably won't happen with alternate desktops that are full-time in separate portions of video memory though, just the virtual ones common with e.g. KDE, Gnome, and WindowMaker, to name just a few - hell, the same behaviour even appears under WinDOS NT using VERN for virtual desktops).
To experiment quickly with overrideredirect, you can, for example, launch wish (Tcl/Tk windowing shell) and issue the command
wm overrideredirect . 1
to make the default wish GUI window into a window manager decoration-less window that will also follow you around the virtual desktops.
(You may have to also issue an update command, I don't remember off the top of my head.)
AFAIK, the software volume management (RAID/ mirroring etc) in Win2K is a (cut down) version of Veritas Volume manager (vxvm). VxVM (via the GUI frontend vmsa) is equally easy under Unix systems, and also has a full command line interface. I'm not sure that the command line functions are there in Win2K. -- "I am not a nut-bag." Millroy the Magician
The article states "and presumably Linux" in relation to AS/400 hardware.
I thought this wasn't quite available yet, owing to some pretty bizarre architectural intricacies of the AS/400 platform. (The single address space issue for one).
My question is: How likely is it that other particles lie undiscovered in accelerator events that have already been observed? Would an event that produced a particle with unexpected mass or other properties be flagged by present event-filtering algorithms?
My own opinion is that it is more than likely that many such particles are out there. QCD allows for several configurations of bound states of quarks (e.g. two quarks bound to two antiquarks - note that this is distinct from a bound state of two mesons (q antiq) orbiting (q antiq)) and gluons (glueballs), or both (hybrids).
One problem with finding these is that in a large proportion of the collider data, any signature for these particles is completely hidden, e.g. by the fact that not all the quantities required to reconstruct the underlying amplitude are measured. The amplitude is what is predicted by the theory, and to obtain the comparison with experiment, one generally has to sum several amplitudes and take the modulus squared (amplitudes are complex numbers). This means that for any given measurable angular probability distribution of particles in a reaction, there are potentially many amplitudes which will, when the modulus squared is taken, predict the same results.
Only in a few cases can enough quantities, in enough coupled reactions, be measured to attempt to reconstruct the amplitude. In fact, in reactions of interest to people seeking new QCD bound state particles (such as the diquark anti-diquark mentioned earlier) I know of only one reaction:- the proton antiproton annihilation at low energy into (exactly) two pions and even then both pi+pi- and pi0pi0 final state reactions are required to reconstruct the amplitudes, along with a set of other constraints.
I did some work in this very field about 5 years ago.
Mark -- "I am not a nut-bag." -- Millroy the Magician
Um, it's manifold not manYfold. A manifold is another term for dimension or "membrane". E.g. Our universe is a manifold of X dimensions.
No! Whilst manIfold *is* a standard mathematical term, the article *does* indeed mean manYfold. This term is defined by the authors on page three of the article.
Essentially, they refer to a brane (which is in itself a manifold) which is "kinked" within a higher dimensional space within which some (e.g gravitational) interactions propagate whilst others (e.g. electromagnetic) are confined to propagation within the brane itself.
Imagine the universe is 1-dimensional (and composed of Crap ASCII Art (TM)). The the Manifold would be a 1d line within 2d, e.g. ---------X-------------------------------Y---- (exciting, huh?... bear with me...)
with all interactions between points X and Y taking place within the 1d line, oblivious of the extra (up-down)dimension.
The manYfold concept would take the above and turn it into the following:- ---------X--------------\ -----------Y------------/ where, although most (i.e. electromagnetic etc.) interactions still have to go all the way along the line and back between X and Y (regardless of the bend of which they are oblivious), gravitational interactions "know" about the extra up-down dimension (referred to in the article as the "bulk") and interact over the now much shorter distance between X and Y, bypassing the normal space distance along the line, leading to things which seem distant in space (but nearby in the "bulk") having much more gravitational influence than they would otherwise.
On a very related note to this concept, I seem to remember something similar being touted about a particular Superstring Theory (E8xE8) where one ends up with 2 independent universes coupled only by gravity. Whilst this is not the same (in the manybrane paper the two universes are actually spatially distant parts of the same one) it does have common features. Of course, it is a long time since I heard about E8xE8 and I may be misremembering.
On a less related (but again similar) note, Richard Feynman and John Wheeler once postulated that all electrons in the universe were in fact the same electron wrapped back and forth (where it appears as an anti-electron) between the beginning and end points of the universe, thus accounting for the fact that every electron in the universe appears absolutely identical. -- "I am not a nut-bag." -- Millroy the Magician
Alright, I am a Mathematics/Physics major at my college.
Congratulations. In a few years time when you graduate, you might even understand why the rest of your comment is such utter tripe.
All I want to know is "How many people actually understood what the article said...?"
Me, for one.
Oh, I see, only two of the hundreds of posters. That's okay, it just makes reading some of these posts funny, but sad at the same time. Alright, here's what the article is missing as far as linking Quantum theory with Standard theory. The link isn't impossible at all...If you have no clue what you are talking about.
I assume you mean "quantum gravity" and the "standard model". Reading the original article would have helped you here, I think. It is amazing that anybody with such and obvious lack of knowledge of particle theory could write the above comment about lack of knowledge being sad.
Has anybody here dealt with Chaos Theory and implications of the Riemmann Zeta function for starters. And I don't mean a search on Yahoo for a definition. Modern science cannot to this day even predict accurately, given all determinable factors what will happen during a reaction on an atomic scale. Quantum theory is based on Probalistic Physics, Relativistic or Standard Theory is based on Deterministic Physics.
The Standard Model is a fully quantum theory. Furthermore, just because a theory is probabilistic, it does not imply that it does not make precise predictions. In fact, the standard model is about the most rigorously tested theories out there (along with GR). It makes extremely accurate predictions of measurable quantities, and agrees with experiment to a phenomenal degree of accuracy. You obviously dont have a clue what you are talking about. (inanity about complex plane etc. snipped)
If you want to respond, please say something intelligent and not pathetic/flame...Thanks
Of course, you could help responders out in that by reading the article and posting something intelligent in the first place. -- "I am not a nut-bag." -- Millroy the Magician
Note that Steven Weinberg is as much a "major player" in physics as anybody.
Along with Abdus Salam and Sheldon Glashow, he was responsible for the unification of electromagnetism and the weak interaction into the electroweak theory mentioned in the article.
If anybody deserves to see a grand unified theory in their lifetime, it is Weinberg. (It's only a pity Richard Feynman won't be around to see it) -- "I am not a nut-bag." -- Millroy the Magician
Interesting technology, but why, oh why...
on
Penny-Sized CDs
·
· Score: 1
... do people often insist upon ending articles on potential future technology with stock quotes like
"And we would not need to type into it--we would just need to speak to the computer to input all the information."
Mark. -- "I am not a nut-bag." -- Millroy the Magician
pretty similar (but more highly strung;-/)-- Open: 90% (Yoda) Conscientious: 13% (Han Solo) Extraverted: 7% (Wampas) Agreeable: 4% (Emperor Palpatine) Nervous: 84% (Tuskan Warrior) -- "I am not a nut-bag." -- Millroy the Magician
hmm... Did you read the eEye advisory page? This (a direct link from the relevant advisory page)looks like a link to an exploit to me, along with download links for the exploit code...
I haven't tried it however so can't vouch for whether it works or not but I have no reason to think it wouldn't. -- "I am not a nut-bag." -- Millroy the Magician
In the UK we pay per minute for all calls including local calls. The cost for local calls off peak (i.e. after 6pm or so) is around 1.5p per minute, dropping to 1p per minute at the weekend. Most, if not all ISPs provide a local point of presence number.
As a further digression, I believe (although I'm not sure) that within the City of Hull, most calls are handled by a separate telco which does follow the US model of charging a flat rate connection fee for local calls. --
I've found my freeserve connection from Linux to be fairly reliable (i.e. first time connection every time) apart from a time last month when they seemed to change something which broke most peoples scripted logins - which I fixed by switching to PAP authentication (as suggested by several folks on the freeserve.help.unix NG).
I don't often get connected at over 44000kbps though (sometimes 45333). --
Slashdot Mirror
I totally agree with you. Microsoft's range of mice *is* pretty good.
--
well...
1. M in MFLOPS is also often expanded as "Mega", (equivalent to the "Million" you give, but more suited to a scientific unit)
2. anything dimensionless which is measured as "per second" is Hertz. Hertz is cycles (or anything else dimensionless) per second i.e. equivalent to a unit of s^-1.
so MFLOPS could easily be M Fl Hz
--
Good old analogue dead-tree technology.
--
The inquirer also has an article which breaks down the 460 watt PSU requirement by component. I still want one even if it would up my electricity bill. Random thought: I hope they don't release these first in California...
--
A few searches I've done of the GNU site haven't turned it up yet. :-(
--
These have a tiny rotational generator inside which charge up a capacitor which is then used to power the watch during periods of no movement.
The generator can actually be heard if you move the watch near to your ear. I believe that the counterweight's movement is geared up by a very high ratio before the generator mechanism (in fact in the manual it quotes some statistic or other about the generator's rotational speed versus rpm of an F1 engine or similar...)
It only takes a short time of normal wearing before the capacitor is fully charged.
--
The Korteweg-de Vries (KdV) equation is a good example
u_{xxx} + 6uu_x + u_t = 0
which describes very similar types of waves (albeit in one dimension). A selection of the solutions can be found here.
I guess that the reason for the quoted "devastating effects" is that solitons are comparatively stable waveforms, which are much less prone to dissipation and dispersion than smaller waves which remain within the regime where the real equations of motion of the water are close enough to the linear wave equation. Soliton waves can travel long distances in relatively unchanged form (and hence still carry all of their initial energy when they finally do hit the coastline).
One of the first recorded experimental observations of a soliton was a bow wave of a boat that John Scott Russell followed for several miles on horseback before losing it in the twists and turns of the canal somewhere near Edinburgh, Scotland. IIRC solitary waves under these conditions do behave somewhat like the KdV solutions.
Cheers, Mark
--
I had just finished reading a collection of his stories when I first registered on an internet chess server back in 1990 or thereabouts and so chose it as a nick.
--
A friend of mine (a mathematician who moved into neural networks and is now a computer vision researcher) once described a neighbour asking something along the lines of "Oh, you do maths. You must be clever. Can you fix my Hoover?"
--
sorry - no explicit mention of the third law. (But some gems such as
)At the risk of drifting even further off-topic, they also have a great Gnu song
Maybe we could persuade RMS to sing it for us?--
Nope, /. wasn't down. You were just in the 99% randomly chosed nodes in the simulation. Thankyou for your cooperation.
Dang - we have to find a way to stop the simulants posting comments on the real 'net.
--
XMMS, I guess in order to be completely skinnable, is an overrideredirect window, meaning one that the window manager will not add decoration to (or in any other way manage the window). This has the effect of making the window "sticky" (i.e. it will appear on all virtual desktops.), since the WM won't hide it when you switch to a different desktop. (This probably won't happen with alternate desktops that are full-time in separate portions of video memory though, just the virtual ones common with e.g. KDE, Gnome, and WindowMaker, to name just a few - hell, the same behaviour even appears under WinDOS NT using VERN for virtual desktops).
To experiment quickly with overrideredirect, you can, for example, launch wish (Tcl/Tk windowing shell) and issue the command
wm overrideredirect . 1
to make the default wish GUI window into a window manager decoration-less window that will also follow you around the virtual desktops.
(You may have to also issue an update command, I don't remember off the top of my head.)
Hope this sheds at least a litle bit of light,
Cheers,
Mark
--
AFAIK, the software volume management (RAID/ mirroring etc) in Win2K is a (cut down) version of Veritas Volume manager (vxvm). VxVM (via the GUI frontend vmsa) is equally easy under Unix systems, and also has a full command line interface. I'm not sure that the command line functions are there in Win2K.
--
"I am not a nut-bag." Millroy the Magician
I thought this wasn't quite available yet, owing to some pretty bizarre architectural intricacies of the AS/400 platform. (The single address space issue for one).
This Linux on AS/400 site has a wealth of information, as well as some comment from IBM.
Cheers, Mark
--
"I am not a nut-bag." -- Millroy the Magician
One problem with finding these is that in a large proportion of the collider data, any signature for these particles is completely hidden, e.g. by the fact that not all the quantities required to reconstruct the underlying amplitude are measured. The amplitude is what is predicted by the theory, and to obtain the comparison with experiment, one generally has to sum several amplitudes and take the modulus squared (amplitudes are complex numbers). This means that for any given measurable angular probability distribution of particles in a reaction, there are potentially many amplitudes which will, when the modulus squared is taken, predict the same results.
Only in a few cases can enough quantities, in enough coupled reactions, be measured to attempt to reconstruct the amplitude. In fact, in reactions of interest to people seeking new QCD bound state particles (such as the diquark anti-diquark mentioned earlier) I know of only one reaction:- the proton antiproton annihilation at low energy into (exactly) two pions and even then both pi+pi- and pi0pi0 final state reactions are required to reconstruct the amplitudes, along with a set of other constraints.
I did some work in this very field about 5 years ago.
Mark
--
"I am not a nut-bag." -- Millroy the Magician
Essentially, they refer to a brane (which is in itself a manifold) which is "kinked" within a higher dimensional space within which some (e.g gravitational) interactions propagate whilst others (e.g. electromagnetic) are confined to propagation within the brane itself.
Imagine the universe is 1-dimensional (and composed of Crap ASCII Art (TM)). The the Manifold would be a 1d line within 2d, e.g.
---------X-------------------------------Y----
(exciting, huh?... bear with me...)
with all interactions between points X and Y taking place within the 1d line, oblivious of the extra (up-down)dimension.
The manYfold concept would take the above and turn it into the following:-
---------X--------------\
-----------Y------------/
where, although most (i.e. electromagnetic etc.) interactions still have to go all the way along the line and back between X and Y (regardless of the bend of which they are oblivious), gravitational interactions "know" about the extra up-down dimension (referred to in the article as the "bulk") and interact over the now much shorter distance between X and Y, bypassing the normal space distance along the line, leading to things which seem distant in space (but nearby in the "bulk") having much more gravitational influence than they would otherwise.
On a very related note to this concept, I seem to remember something similar being touted about a particular Superstring Theory (E8xE8) where one ends up with 2 independent universes coupled only by gravity. Whilst this is not the same (in the manybrane paper the two universes are actually spatially distant parts of the same one) it does have common features. Of course, it is a long time since I heard about E8xE8 and I may be misremembering.
On a less related (but again similar) note, Richard Feynman and John Wheeler once postulated that all electrons in the universe were in fact the same electron wrapped back and forth (where it appears as an anti-electron) between the beginning and end points of the universe, thus accounting for the fact that every electron in the universe appears absolutely identical.
--
"I am not a nut-bag." -- Millroy the Magician
--
"I am not a nut-bag." -- Millroy the Magician
Along with Abdus Salam and Sheldon Glashow, he was responsible for the unification of electromagnetism and the weak interaction into the electroweak theory mentioned in the article.
If anybody deserves to see a grand unified theory in their lifetime, it is Weinberg. (It's only a pity Richard Feynman won't be around to see it)
--
"I am not a nut-bag." -- Millroy the Magician
--
"I am not a nut-bag." -- Millroy the Magician
pretty similar (but more highly strung ;-/)--
Open: 90% (Yoda)
Conscientious: 13% (Han Solo)
Extraverted: 7% (Wampas)
Agreeable: 4% (Emperor Palpatine)
Nervous: 84% (Tuskan Warrior)
--
"I am not a nut-bag." -- Millroy the Magician
I haven't tried it however so can't vouch for whether it works or not but I have no reason to think it wouldn't.
--
"I am not a nut-bag." -- Millroy the Magician
I don't remember who said it originally, but "Real FORTRAN programmers can write FORTRAN in any language" ;)
--
In the UK we pay per minute for all calls including local calls. The cost for local calls off peak (i.e. after 6pm or so) is around 1.5p per minute, dropping to 1p per minute at the weekend. Most, if not all ISPs provide a local point of presence number.
As a further digression, I believe (although I'm not sure) that within the City of Hull, most calls are handled by a separate telco which does follow the US model of charging a flat rate connection fee for local calls.
--
I've found my freeserve connection from Linux to be fairly reliable (i.e. first time connection every time) apart from a time last month when they seemed to change something which broke most peoples scripted logins - which I fixed by switching to PAP authentication (as suggested by several folks on the freeserve.help.unix NG).
I don't often get connected at over 44000kbps though (sometimes 45333).
--