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Customer Reviews Of ASUS Eee PC T91MT-PU17-BK Tablet PC Intel Atom Z520(1.33GHz) 8.9" Wide SVGA 1GB Memory 32GB SSD HDD Intel GMA 500 on 2010-08-27
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battery life is really long at 5 hours
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Customer Reviews Of ASUS Eee PC T91MT-PU17-BK Tablet PC Intel Atom Z520(1.33GHz) 8.9" Wide SVGA 1GB Memory 32GB SSD HDD Intel GMA 500 on 2010-08-26
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Stylus snaps into place nicely
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Keyboard feels good to type on
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Good responsive touchscreen
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Surfs the web as fast as a desktop
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quite speedy and I feel little to no lag
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there is only 1 slot for memory
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The hinge is EXTREMELY strong and very well built.
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Even on full power mode this unit doesn't get too hot
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My favorite feature? Watching the iPhad junkies jaws drop when I turn my tablet into a *real* computer in a blink of an eye.
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something I can carry around the house or travel with
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8.9" would be my limit for size though as keyboards cannot be any smaller
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nice looking, multi-touch machine to goof around with, it will not disappoint
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Keyboard keys are big for the dimension of the netbook.
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Keyboard is a little cramped but good for the size, still is easy to type extra keys and I have small fingers.
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Why is the singlet configuration anti-symmetric? on 2010-08-12
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the s = 1 states all share the property of being symmetric. In fact this symmetry property is preserved under rotations (this is a great thing to check yourself), so you can be sure that whatever the s = 1 m = 0 state is it must be symmetric since it only mixes with the other s = 1 states under rotations
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Two Versions of the Projection Postulate: From EPR Argument to One-Way Quantum Computing and Teleportation on 2010-06-25
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purely discrete spectra. In this case each pure state is projected as the result of measurement onto another pure state, the corresponding eigenvector. Lüders postulated that the situation is not changed even in the case of degenerate spectra; see [
2]. By projecting a pure state we obtain again a pure state, the orthogonal projection on the corresponding eigen-subspace
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in general the postmeasurement state is not pure, it is a mixed state
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analysis of the EPR argument. We will see that they really applied the Lüders postulate
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formal application of the original von Neumann postulate blocks the EPR considerations
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quantum teleportation scheme. We will see again that it is fundamentally based on the use of the Lüders postulate
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Dirac equation - Wikipedia, the free encyclopedia on 2010-02-12
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a relativistic generalization of this equation, then the space and time derivatives must enter symmetrically
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The Dirac Equation on 2010-02-12
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Quantum mechanics is based on a correspondence principle that maps classical dynamical variables to differential operators.
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non-relativistic Schrödinger equation of a free particle of mass m
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If we were to replace E in this equation with the operator ih(∂/∂t), the resulting equation of motion would involve the second time derivative of the wave function, in contrast with the non-relativistic Schrödinger equation, in which only the first time derivative of the wave function appears.
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justification of this statement involved the need for the
probability density of the wave to be always positive
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a wave equation whose solutions would be solutions of (2), but that was linear in E
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These four quantities, along with unity, form the basis of what is called a Clifford algebra
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not commutative, a fact which suggests some underlying structure. (The articulation of non-commuting entities into structures of commuting entities is a useful heuristic principle, although it is rarely mentioned explicitly.
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the wave function of this particle must actually have four components
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analogous to the relations for the components of angular momentum of a classical particle
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each of the four components y1, y2, y3, y4 of the original four-dimensional vector of wave functions individually satisfies the Klein-Gordon equation
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either fa by itself or fb by itself is sufficient to determine the complete wave function y for a given basis
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the signs of the Pauli spin matrices are reversed
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left-handed and right-handed spin states of the particle for that basis
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if y is a solution of Dirac’s equation (6), it follows that g5y is also a solution, but with the momentum and the energy negated relative to the sign of the mass
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when m is not zero, the distinction between the two factors may be extremely small if the energy and momentum are extremely large, i.e., for a particle moving at close to the speed of light
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for any given solution y, the wave functions Iy and g5y are also solutions, and since the Dirac equation is linear, any linear combination of solutions is also a solution
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the non-zero parts of yL and yR are just the two-dimensional vectors fa and fb discussed previously
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fa and fb are the same except for having opposite intrinsic spin
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each quantum “orbit” can be occupied by two electrons with opposite spins
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for a stationary particle, the wave function y should be independent of time, except for possibly an unobservable phase advance
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in order for fa and fb to be harmonic functions, the quantity in parentheses in this equation must vanish
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We expect both of these “spin divergences” to vanish, so the second equation requires us to set fb = 0. Hence, with this basis applied to stationary (or approximately to slowly moving) particles, we have fb = 0
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The only non-vanishing solution is with
w equal to

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two components of fa (i.e., f1 and f2) consist of the two spin states of the particle
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it turns out that Dirac’s equations actually is invariant under Lorentz transformations, provided we take into account the transformation properties of the g matrices
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the Weyl basis is convenient for high-speed electrons (for which the momentum is much larger than the rest mass), and the Dirac basis is convenient for stationary or low-speed particles
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let the contravariant and covariant components of a given 4-vector be denoted with super-scripted and sub-scripted indices respectively
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The differential operators ∂/∂xm transform as the components of a covariant 4-vector, so for convenience we will denote them by ∂m
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the contravariant and covariant components of any 4-vector “a” are related by |
| |
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before we can assert that this equation is invariant under Lorentz transformations, we need to show that y’(x’) represents the same physical wave function with respect to the spacetime coordinates x’ as is represented by y(x) with respect to the spacetime coordinates x. This requires us to show that they have the same probability density at any given event.
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the four components of y can be split into two inter-related bi-vectors ya and yb, and the interchange of these two represents another kind of “transposition”
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in a relativistic theory the probability density cannot be invariant under Lorentz transformations if probability is to be invariant, just as the charge density cannot be invariant if charge is invariant
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three transformations, consisting of the overall transposition, the complex conjugation of the elements, and the transposition of the two bi-vectors
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. This positive-definite quantity represents
the probability density, which transforms (as it should) under a Lorentz transformation in the same way as the time coordinate of a timelike interval
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obviously real-valued, and it is positive definite, because the minimum value it can take is with the cosine equal to -1
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the probability current, i.e., the probability of the particle crossing a given plane (normal to a given direction) per unit area and per unit time
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the four components of the wave function y can be split into two sets, ya and yb, each consisting of two components, and these two sets are redundant, so the particle can be represented by just two wave functions, corresponding to the two possible spin states for a given basis
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the transformation from one basis to another can make use of these four degrees of freedom to produce an unexpected (in 1927) consequence
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Our argument is valid only provided the position of the particle is an observable. If this assumption holds, the particle must have a spin angular momentum of half a quantum
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he didn’t regard massive bosons as “important”. It isn’t clear what he meant by this (perhaps he meant that such particles are not elementary?
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quantum wave function itself as an operator, giving a field representation of all the possible quantum fields
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any relativistic description of a particle necessarily involves not just the wave function of a single particle, but multiple wave functions representing the potential for other particles
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How to Get Fear Off Your Business's Back » Heart of Business on 2010-01-25
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grabbed you and said, 'Hold it, don't forget your lunch, and your ticket to get in
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you're not seeing some gorgeous, valuable and much-needed jewel right where you're standing
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Notice the physical sensation of fear- and revel in it.
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Breath into it. Already you should start to feel more spacious and calm.
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most of the time these phrases are TRUE- but incomplete.
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clamp down from the fear, and miss the most critical and helpful part of the message
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ask in your heart, with a willingness to be surprised, for the rest of the message
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your friend Fear been shouting herself hoarse
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Toxic Mold, Black Mold, Mold Problem and Mold Damage Information Center on 2009-07-20
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brain fog, confusion, and/or memory loss
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- burning in the throat and lungs
similar to acid reflux] - cancer
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colds, recurring and with
decreased resistance to infection
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dandruff problems [chronic]
that don't go away despite use
of anti-dandruff shampoos
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depression/anxiety/dementia
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fatigue [chronic, excessive, or continued]
and/or general malaise
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feeling lost or "disconnected" from what's
happening around you
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learning difficulties or mental functioning
problems or personality changes
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memory loss or memory
difficulties/Alzheimers-like symptoms
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sinus congestion, sinus problems,
and chronic sinusitis
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sneezing fits (more than three
sneezes in a row, happening often)
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vertigo [feelings of dizziness, lightheadedness,
faintness, and unsteadiness]
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Squeaky Clothes Dryer on 2009-03-31
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Four possible areas:
There is a small roller that tightens the drive belt for the drum. They can squeak. Remove the lower front panel and you should see the small roller near the motor and belt.
Another is the two larger rollers that support the drum. You will see this if you remove the front lower panel.
A another is where the drum rides on the upper round part of the door/opening and it has a plastic guide that seperates the metal drum from the metal door/opening. Over time this wears out and the two metal pieces will squeak.
The motor bearings may be worn. Remove the drum drive belt and then start the dryer. If it squeals with the belt off then the motor bearings are likely worn.
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rear drum bearing. These bearings, when they fail, they make the most shrill sound you can imagine
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It (the dryer) is serviced from the front.
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To raise the top of the dryer, insert a putty knife into the crack between the top and the front panel and push against the spring clips to release them. There are two clips, anywhere from 23 to 8 inches in from the sides. You should be able to feel the spring tension when you push on them. Push one in slightly, and raise that side, then the same for the other end of the main top. Once the top is up, you will disconnect the wires to the door switch (right side, on the backside of the front panel), if there are 3, mark them somehow to get them back correctly, if only 2 wires, no need as location makes no difference. Then remove the phillips screw holding the yellow tab-looking plastic thing front and center in the top of the front panel. Then remove the 2 screws holding the front panel to the side panels, screw heads are inside the cabinet, screws pointing towards you. Pull the front panel away and lift off the bottom clips to remove. Now remove the belt from the idler pulley. The idler is located right behind the blower/motor unit. Make sure to note how the belt goes around the idler so you get it back on right. Once the belt is free, slide the belt to the back edge of the drum and, using it as a handle (on the top side of the drum), lift straight up to disengage the rear bearing from the cradle. This can be a very tight fit, especially if it worn badly. You may have to pull relatively hard. Once done, the drum will pull out through the front of the cabinet. Now you can see the drum support ball on the back of the drum and the cradle that holds it. Simply keep note of how you remove the cradle from the back wall to reassemble it correctly (this is where 4 hands are better than 2 and don't loose track of the ground bearing from the back). Using a small drop of supplied grease to keep the bearing in the plastic cradle makes reassembly much easier. As far as the post on the back of the drum is concerned, if the new and old parts look ABSOLUTELY identical, leave it alone and just clean it up good. If you must change it (another place where 4 hands are better than 2), be very careful with the new screws, because they are cheap and the heads strip almost instantly. Put a generous portion of supplied grease into the cradle and reassemble the dryer.
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If you had to change the rear support on the back of the drum, you might want to look that over once more to make sure it's together right and tight. The rear of the drum runs very close to the heater and its ceramic insulators and I would hate to see you short out your heating element because you overlooked something. It could also be the belt tracking wrong in the idler pulley.
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use #10 x 1/2" Hex Heads instead of the crappy, easily stripped screws that are included with the repair kit
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I went to a Sears with a Parts area with my model # and the parts # he suggested. Paid $28.00 for the kit, went home followed his directions and replaced all the pieces in a little over an hour by myself
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in my dryer there was no reason to disconnect the door switch. I wasn't going to work on the dryer with power applied, so there was no danger of accidental turn-on, and the wires only go to the front panel. I don't think there was any reason to remove the funny yellow thing either. To pop the drum out of the old bearing I used my hands leveraged against the back panel, rather than pulling on the belt.
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the idler pulley in attached to a spring loaded "L" bracket that rotates, slackening the belt for removal and reattachment. I should have known this before proceeding but did not.
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- the idler pulley is spring loaded. when you remove the spring be prepared for the parts around it to fall out/down. if you have a rear fan panel on the back side, it may be easier for you to access the idler this way. take a picture of what the pulley looks like before you remove the spring.
- the smaller bearing was completely gone (ground away) so we were unsure where the new one went, but we figured it out
- you will need new screws. buy some 10 x1/2 and a few nuts. we used hex washer heads.
- when you are re-assembling the drum it will appear to hang too low and angle slightly. this will fix itself when you put the front panel back on.
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A Linux Distribution for an Old Laptop - Linux Forums on 2009-02-09
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800 megahertz Celeron based machine hosting a 10 gigabyte hard drive, 128 megabytes of RAM, an S3 Virge video card (memory shared with system RAM) and a generic sound card
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