Even better - I did an apples-to-apples comparison by disabling as much as I can in 4.6 (starting with turning off compositing). It is still way slower. The most annoying part is multiple second freeze every time I switch to a desktop which has lots of applications open (or just konsole with lots of tabs). To really see this keep your session running for a week or so.
For reference, my computer is a dual core 2.66 Ghz, 8GB of RAM, Quadro NVS 160M for graphics.
Out of curiosity, what behavior from KDE 3 is not possible in KDE 4?
You can revert to a "classic" desktop with icons, a classic Start Menu, and you can configure the task bar to work just like KDE 3. As far as I know, the only feature I recall from KDE 3 that I haven't really seen in 4 is the optional feature of Mac-like application menus.
Speed. Especially if your desktop is 1920x1200 or larger.
I do not see $16T in the actual document - is this an integrate number (i.e. the sum of all loans provided over the time period) ? Everybody should keep in mind that Fed provides overnight loans which have to be returned the next day. If the bank needs more money they do it again so the figure multiplies quickly.
The quick look at plots shows that the maximum amount (in 2008) was below $1T.
We have recently been testing a data acquisition system and were initially using some PC's built-in clock. After seeing discrepancy with a quality oscillator used in the DAQ (and making sure no packets are lost) we traced it to an awful RTC - it had a few seconds drift over an hour or two. This was easy to check against NIST. And no, it was really the RTC, not the CPU timer..
I think some manufacturers have stopped putting quartz crystals on board and just use a silicon oscillator assuming that the user will use NTP.
If you know the capacitance and how much charge is stored you can compute the energy you could extract from the capacitor: E=Q^2/2C (see wikipedia).
Larger capacitors (larger C) store less energy for the same charge (i.e. it is easier to charge them), but can store larger amounts of charge overall. Typically you charge up to a certain voltage, in that case E=V^2C/2, so the stored energy goes up with capacitance.
I don't see anything wrong with sticking to modern definitions. How else will the public learn them ? Math education in schools is not improving for sure..
The big advantage of AMS is that it sits above the atmosphere and can observe high-energy cosmic rays that never reach Earth surface.
The original plans called for a cryogenic magnet. It is interesting to note that they have gotten to the point where the system estimated lifetime would be 3 years, but swapped it for a permanent magnet version in the end.
I imagine this was quite challenging as loss of cooling/superconductivity would result in an explosion - not a good thing to have. And that loss can simply result from a high-energy cosmic ray striking a tiny superconducting wire. Somehow they found a way around this..
After the Chernobyl accident, the team that had created the Lunokhod rovers was asked to build remote-controlled vehicles (RCV) to help clean up. The RCV's first task was to remove reactor debris (chunks of graphite from the core) from a roof, by pushing it off the edge of the roof. The RCVs worked well; eventually though they failed due to the radiation. This despite them being rad-hardened, as the original Lunokhods had been powered by an RTG.
RTGs do not produce much external radiation - they are based on alpha-emitter material that is absorbed by the surrounding shielding converting radiation into heat. However, space hardware is rad-hardened because of cosmic rays - natural radiation present in space. This is often not as high-level as can be found near reactor core.
'I think this is positive, of great benefit, though some might see it as a threat and it does serve as a wake-up call for us not to become complacent,' said Professor Sir Chris Llewellyn Smith
Science is absolutely not a competition. Was Argentina harmed because the US went to the moon? Was Russia harmed when penicillin was discovered? No, not at all. China's increased scientific research is a benefit to all of us.
Keep in mind that for a while penicillin was an important military asset, as it greatly increased the survival rate of wounded soldiers during World War 2.
The spot illuminated by the laser is moving. It is just as valid an object as anything else (especially, if you consider that for a well stabilized laser the individual photons in the beam are correlated..) and can be used to synchronize an array of clocks. It is just you cannot use it to transmit information from one point on the moon to another faster than c.
The specific constraint is that information cannot be transmitted faster than c. When space expands the light beam expands as well (with its energy lower) and the number of bits you get per unit time is lowered.
There are plenty of ordinary phenomena that propagate faster than c, they just do not convey information. Entanglement is the more well known one, but shadows work too. Imagine a laser point that you rotate perpendicular to its axis making one rotation per second. Then on the Moon the (rather large) spot from the laser will move at a speed of ~6-7c. There is nothing wrong with this as the spot does not convey information from one place on the moon to another.
Here is an example of a "shadow" - I put "shadow" in quotes because the nature of the effect is somewhere between looking through colored glass and using nightvision amplifier. The light gets shifted to higher energy (shorter wavelength) by interaction with electrons in plasma.
There are shadows and sources. The biggest contaminant is caused by the MilkyWay and it is subtracted out. But outside of MilkyWay space is mostly empty.
All good questions and guesses ! You should go get a Physics Ph.D., it is much fun !
After the Big Bang occurred the matter was very very hot. So it looked basically like fire. But since entire universe was "on fire" and light has a finite propagation speed we can still see light just reaching us now from very far away places in the universe - Cosmic Microwave Background.
It has many interesting properties. First, as you point out you can measure our speed relative to it. Secondly, it has a very long wavelength which is due to expansion of the universe - the places farther away are moving away from us.
The expansion of the universe is actually very very small even on the scales of a solar system or galaxy and starts to matter on the intergalactic scales. It is characterized by Hubble constant= 70 (km/s)/Mpc - for each million parsecs the speed goes up by 70 km/s. For comparison, Earth's orbital speed is 30 km/s and the size of the entire Milky Way (our galaxy) is only 30 thousand parsecs.
Yes, there is a time dilation effect.
Btw, speaking of time dilation effect, the scientists at NIST has recently built an atomic clock based on a single Aluminum atom that is so accurate that they can see time dilation from Earth gravitational field. They measured the rate of their clock, than raised the setup and measured a faster rate - clocks slow down in stronger gravitational field and Earth field decreases by a small amount as you get further away from Earth.
Stellar parallax is usually measured using positions of the earth at different points of the orbit around the sun, which provides a much longer measurement base.
CUDA is much easier once you had experience with hardware languages like Verilog or VHDL. It is very low-level and knowing how chips are designed helps a lot.
1) Ultra Low Frequency Electromagnetic Waves (ULF 5003000 Hz) were detected in certain
dilutions of ltrates (100 nm, 20 nm) from cultures of micro-organisms (virus, bacteria) or from
the plasma of humans infected with the same agents (Fig. 2). Same results are obtained from
their extracted DNA.
2) The electromagnetic signals (EMS) are not linearly correlated with the initial number of
bacterial cells before their ltration. In one experiment the EMS were similar in a suspension
of E. coli cells varying from 109 down to 10. It is an all or none phenomenon.
His coil is too small to pick up "ULF waves", rather it picks up magnetic fields varying at audio frequencies. There are plenty of natural and artificial sources that produce these and making a sensitive measurement is tricky.
Filed strength is independent of the number of potential emitters - clear signature that they are measuring instrumental noise.
Actually RS-232 is a pretty bad protocol because it uses single ended voltage signaling. A current loop is much more resistant to noise as the amount of current that circulates has to be conserved.
Slashdot Mirror
For reference, my computer is a dual core 2.66 Ghz, 8GB of RAM, Quadro NVS 160M for graphics.
Out of curiosity, what behavior from KDE 3 is not possible in KDE 4?
You can revert to a "classic" desktop with icons, a classic Start Menu, and you can configure the task bar to work just like KDE 3. As far as I know, the only feature I recall from KDE 3 that I haven't really seen in 4 is the optional feature of Mac-like application menus.
Speed. Especially if your desktop is 1920x1200 or larger.
The quick look at plots shows that the maximum amount (in 2008) was below $1T.
I only wish they did this for engineers and scientists, I would have loved the break from the books to get my hands dirty.
They do.
I think some manufacturers have stopped putting quartz crystals on board and just use a silicon oscillator assuming that the user will use NTP.
If you know the capacitance and how much charge is stored you can compute the energy you could extract from the capacitor: E=Q^2/2C (see wikipedia).
Larger capacitors (larger C) store less energy for the same charge (i.e. it is easier to charge them), but can store larger amounts of charge overall. Typically you charge up to a certain voltage, in that case E=V^2C/2, so the stored energy goes up with capacitance.
I don't see anything wrong with sticking to modern definitions. How else will the public learn them ? Math education in schools is not improving for sure..
A ball is solid. A sphere is a surface of a ball.
The original plans called for a cryogenic magnet. It is interesting to note that they have gotten to the point where the system estimated lifetime would be 3 years, but swapped it for a permanent magnet version in the end.
I imagine this was quite challenging as loss of cooling/superconductivity would result in an explosion - not a good thing to have. And that loss can simply result from a high-energy cosmic ray striking a tiny superconducting wire. Somehow they found a way around this..
It got built a long time ago, it was just waiting for the promised shuttle launch.
After the Chernobyl accident, the team that had created the Lunokhod rovers was asked to build remote-controlled vehicles (RCV) to help clean up. The RCV's first task was to remove reactor debris (chunks of graphite from the core) from a roof, by pushing it off the edge of the roof. The RCVs worked well; eventually though they failed due to the radiation. This despite them being rad-hardened, as the original Lunokhods had been powered by an RTG.
RTGs do not produce much external radiation - they are based on alpha-emitter material that is absorbed by the surrounding shielding converting radiation into heat. However, space hardware is rad-hardened because of cosmic rays - natural radiation present in space. This is often not as high-level as can be found near reactor core.
Here is an interesting description of using a robot to fix a high intensity radiaiton source.
Cesium accumulates in the bones. You can shield from iodine fairly easily with a supplement, this is much harder for cesium.
Have they considered putting it in cans and selling it at gas stations with a big glowing F on it?
Fukushima - For Radiant Health! It'll make a Monster out of you!
marketing has an answer for everything!
This has been tried before...
'I think this is positive, of great benefit, though some might see it as a threat and it does serve as a wake-up call for us not to become complacent,' said Professor Sir Chris Llewellyn Smith
Science is absolutely not a competition. Was Argentina harmed because the US went to the moon? Was Russia harmed when penicillin was discovered? No, not at all. China's increased scientific research is a benefit to all of us.
Keep in mind that for a while penicillin was an important military asset, as it greatly increased the survival rate of wounded soldiers during World War 2.
"China is set to overtake America in scientific output as soon as 2013" sounds like something that would bubble up in a Civ 4 or 5 game.
And the ability to beat the game at Deity level should be a requirement for any politician. After, all isn't the real thing a lot harder ?
The spot illuminated by the laser is moving. It is just as valid an object as anything else (especially, if you consider that for a well stabilized laser the individual photons in the beam are correlated..) and can be used to synchronize an array of clocks. It is just you cannot use it to transmit information from one point on the moon to another faster than c.
There are plenty of ordinary phenomena that propagate faster than c, they just do not convey information. Entanglement is the more well known one, but shadows work too. Imagine a laser point that you rotate perpendicular to its axis making one rotation per second. Then on the Moon the (rather large) spot from the laser will move at a speed of ~6-7c. There is nothing wrong with this as the spot does not convey information from one place on the moon to another.
Here is an example of a "shadow" - I put "shadow" in quotes because the nature of the effect is somewhere between looking through colored glass and using nightvision amplifier. The light gets shifted to higher energy (shorter wavelength) by interaction with electrons in plasma.
There are shadows and sources. The biggest contaminant is caused by the MilkyWay and it is subtracted out. But outside of MilkyWay space is mostly empty.
After the Big Bang occurred the matter was very very hot. So it looked basically like fire. But since entire universe was "on fire" and light has a finite propagation speed we can still see light just reaching us now from very far away places in the universe - Cosmic Microwave Background.
It has many interesting properties. First, as you point out you can measure our speed relative to it. Secondly, it has a very long wavelength which is due to expansion of the universe - the places farther away are moving away from us.
The expansion of the universe is actually very very small even on the scales of a solar system or galaxy and starts to matter on the intergalactic scales. It is characterized by Hubble constant= 70 (km/s)/Mpc - for each million parsecs the speed goes up by 70 km/s. For comparison, Earth's orbital speed is 30 km/s and the size of the entire Milky Way (our galaxy) is only 30 thousand parsecs.
Yes, there is a time dilation effect.
Btw, speaking of time dilation effect, the scientists at NIST has recently built an atomic clock based on a single Aluminum atom that is so accurate that they can see time dilation from Earth gravitational field. They measured the rate of their clock, than raised the setup and measured a faster rate - clocks slow down in stronger gravitational field and Earth field decreases by a small amount as you get further away from Earth.
Stellar parallax is usually measured using positions of the earth at different points of the orbit around the sun, which provides a much longer measurement base.
CUDA is much easier once you had experience with hardware languages like Verilog or VHDL. It is very low-level and knowing how chips are designed helps a lot.
Actually RS-232 is a pretty bad protocol because it uses single ended voltage signaling. A current loop is much more resistant to noise as the amount of current that circulates has to be conserved.
Also the whole technical side of publishing. Sure, anyone can do 'Save as PDF' in Word, but doing it right is nontrivial.
Indeed, you need TeX for that ;)