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The Einstein tensor describes a certain aspect of overall spacetime curvature, in the sense that it determines the values of a certain combination of components of the Riemann tensor (it fixes 10 out of its 20 independent components). But unlike the Riemann tensor, it is not a complete description of the geometry of spacetime. Thus, the Einstein equations provide only a local constraint on the metric, but don’t determine it uniquely. Physically speaking, mass and energy have of course a gravitational effect, but neither appear as quantities in the source term of the field equations - there’s only the energy-momentum tensor field \(T_{\mu \nu}\). Here’s the thing with this - the Einstein equations are a purely local statement. So for example, if you wish to know the geometry of spacetime in vacuum outside some central body, the equation you are in fact solving is the vacuum equation \[G_{\mu \nu}=0\] which implies \[R_{\mu \nu}=0\] There is in the first instance no reference here to any source term, not even the energy-momentum tensor, because you are locally in a vacuum. During the process of solving these equations, you have to impose boundary conditions, one of which will be that sufficiently far from the central body the gravitational field asymptotically becomes Newtonian; it’s only through that boundary condition that mass makes an appearance at all. Only in the interior of your central body do you solve the full equations \[G_{\mu \nu}=\kappa T_{\mu \nu}\] wherein the energy-momentum tensor describes the overall distribution of energy density, momentum density, stresses, strains, and shear (note that “mass” is again not part of this). By solving this equation along with boundary conditions you can find the metric. You can work this backwards - you can start with a metric, and calculate the energy-momentum tensor. But here’s the thing: if the tensor comes out as zero, this does not mean that there’s no mass or energy somewhere around, it means only that the metric you started with describes a vacuum spacetime. If it’s not zero, you’re also out of luck, because the energy-momentum tensor alone is not a unique description of a classical system. Knowing its components tells you nothing about what physical form this system actually takes - two physically different systems in terms of internal structure, time evolution etc can in fact have the same energy-momentum tensor. That’s because this tensor is the conserved Noether current associated with time-translation invariance, so what it reflects are a system’s symmetries, but not necessarily or uniquely its physical structure. There’s no unique 1-to-1 correspondence between this tensor and a particular configuration of matter and energy, since all it contains are density distributions. IOW, a given matter-energy configuration will have a unique energy-momentum tensor associated with it, but the reverse is not true - any given energy-momentum tensor can correspond to more than one possible matter-energy configuration. Thus it is not useful to try and define matter-energy by starting with spacetime geometry. Yes, they are of course closely related, but the relationship is not just a trivial equality; there’s many subtleties to consider. A zero cosmological constant does not imply a static universe, only that expansion happens at a constant rate. Matter and antimatter have the same gravitational affects, they are not opposite in terms of curvature.

Dear Mr President. Maybe the guy who thought launching a car into space was a good idea is not perfectly qualified to identify wasteful spending. Also, what do you plan to do when the other 50% of Americans discover that tariffs are paid by the citizens of the country which imposes them? And finally (for the minute), if America was too cold to hold your inauguration outside them you certainly don't want Greenland, it's f%^&*&ing freezing. Yours etc

Cooling efficiency is not the same measurement. When you say that heating is (nearly) 100% efficient, that’s saying all of the energy is turned into heat. 100 J of electricity is turned into 100J of thermal. (temp goes up) Cooling efficiency is really the coefficient of performance; it’s about moving stuff with energy around. You can remove, say, 250J of heat from space with 100J of input, but you haven’t destroyed any energy - the rejected heat from the system is larger. 250J is removed from the space (temp goes down) but that and the 100J of electricity is deposited elsewhere (350J total) - wherever your thermal reservoir is. If you compare apples to apples, the COP of a heat pump is always bigger for heating than cooling, given the same input of heat and work https://en.m.wikipedia.org/wiki/Coefficient_of_performance

I probably would enjoy it as I have read some of Penrose's work, but have too much on my plate already. I will check it out later after I contend with this current project of Federico's. Most people have no idea of how massive the study of consciousness actually is. They see it as a study of the brain, maybe physics and cosmology, a little religion and a little philosophy. In reality consciousness study affects all of religion, probably 80%, or more, of philosophy, and most if not all branches of science -- a massive study indeed. Federico's theory touches on too many of these separate ideas, so my mind was reeling just trying to keep up. Then I realized that Federico probably does not even see all of these implications because he does not study consciousness and so does not realize all of the leads to other branches of science, etc. I started to take notes while watching the video, but half way through I quit as there were just too many points to address and no context for the explanations that are necessary in order to understand and address those points. In order to give context to many of those points, I would have to write a damned book -- and that book would only be about what I think I know, not what I am still trying to figure out. So I am going to select a few of the ideas to discuss that his theory clarifies or enhances. Federico starts out with a bang saying that consciousness is not in the body and compares the experience with that of using a drone. This very much aligns with my thinking. Years ago, I was corresponding with a physics professor, who explained to me that thought has no power. He said, "If you take the greatest thoughts known to man and write them down or save them on a disk then wait a day, a year, or a hundred years; when you check them, you will find that they have done nothing. Thought has no power, no force, no ability to do anything." He was right. Federico finds similar conclusions about AI. So I spent some time breaking down consciousness into parts. I found that knowledge, memory, and thought are digital, work within time and space, and are internal and private -- I know my thoughts/you know yours. But emotion, feeling (not tactile), and awareness are not digital, they are analogue/fluid (emotion does not work within time and space but actually ignores time) and these are external and shared -- unless we intentionally hide our feelings they show. This is why emotion can cause bonding, because it works between us -- it works between life. It is a force. It is external. It was not long before I realized that the digital part of consciousness was the rational aspect of mind -- what most people think of as consciousness. The analogue part of consciousness was the unconscious and it is ruled by emotion. So why did we ever decide that digital thought was consciousness? I think there were two reasons. The first is because we control thought and the rational mind, whereas the unconscious is strictly reactionary so we have very little control over it. And Descartes did not help when he stated, "I think; therefore, I am." So did that mean if I don't think, then I am not? Yes. That is exactly how it was interpreted, so infants, deaf people, the mentally handicapped, and many indigenous people (having an unknown language) were treated as though they were NOT. The reasoning here is very simple; if you do not have language, then you have no way to prove you think, therefore, you were not considered conscious. This means that all other life was also not conscious, not aware, not alive? Science has been systematically changing this belief as it proves consciousness in different species, but is not willing to state categorically that if something is alive, then it is conscious. (The thought thing again.) So to start off one must understand that Federico is not talking about thought, he is not talking about the brain, he is talking about the unconscious aspect of mind, which is ruled by emotion, feeling, and want. This is what consciousness, or awareness, derives from. Where is the unconscious? No one knows. It does not seem to have a location. We have no idea of it's size or parameters. We know that it connects to other life forms because it could not promote bonding if it did not and this is where psychic phenomenon originates and it is where "God" ideas originate. Jung could tell us some about the unconscious and "God" ideas, but Matt Blanco could tell us about the six or seven levels (stratums) in the unconscious that he discovered through math while he was looking for a logic in the unconscious. He found it. He realized that the unconscious was thought to have no logic, but this was because it ignored time. (Yes. This has been clinically proven and is the reason why childhood trauma can affect an entire lifetime and why PTSD happens.) Logic, "this therefore, that" is part of logic, and the "therefore" requires time, so this logic does not work in the unconscious. Blanco found that the deeper levels of the unconscious used another method to evaluate, but it has been a while since I read it, so I am going to have to look it up. There is so much more, but this is hopefully a good start and all I can do now. Tomorrow I will try to address some of the other points made in the video. Gee

A laptop is not a good device for playing games. Not even a so-called gaming laptop. It's just silly. Buy/build yourself from parts a normal desktop computer. You can then replace the CPU/mobo fans with water cooling systems. https://www.ebay.com/b/Computer-Water-Cooling-Equipment/131503/bn_661884 If this is not a satisfactory answer, try a laptop cooling pad. https://www.ebay.com/sch/i.html?_nkw=cooling+pad They have many external fans that dissipate energy from the laptop better than a table. Fans can run at lower speed so they are quieter. At least until their bearings break down. A good laptop has a processor connected to the entire body, which is made of metal, usually magnesium alloy (e.g. AZ91D 9-10% Al, the rest Mg). Energy is dissipated over a large area.

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I had a new thought about all this. It could very well be a, close as you can get to a perpetual motion machine. The slightest Breeze might kick start a Cyclone. The air it pushes out feeding back into it self.