Results 281 to 290 of about 120,404 (314)
Advanced Science, EarlyView.Electroacupuncture (EA) ameliorates learning and memory function in 5×FAD mice by regulating the brain glucose metabolic network. This neuroprotective effect is closely related to enhancing neuronal energy utilization via the IGF1/IGF1R signaling pathway.
Shengxiang Liang +12 more
wiley +1 more source
Advanced Science, EarlyView.Fibronectin 1 (FN1)‐expressing subicular subpopulations encode novel object preference and selectively govern retrieval of novel object recognition (NOR) via affecting excitability of entorhinal‐projecting circuit through large conductance Ca2+‐activated potassium (BK) channel. ABSTRACT Novel object recognition (NOR), referring to the cognitive ability
Fan Fei +15 more
wiley +1 more source
Advanced Science, EarlyView.The pholidota‐inspired electronic skin is successfully constructed, originally realized four‐state reversible switching of terahertz‐wave reflection, absorption, transmission, and secondary reflection. In response to external demands, it issues deformation instructions, verifies the deformation state after the equipment executes the action, and thus ...
Shangjing Li +4 more
wiley +1 more source
The Thermodynamics of Black Holes [PDF]
Living Reviews in Relativity, 2001 46 pages, no figures, plain latex file; submitted to Living Reviews in Relativity.
Robert M Wald, Wald Robert M
exaly +7 more sources
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Scientific American, 2009
The article discusses the prevention of the formation of black holes as a result of quantum effects and how these effects may give rise to dense entities called black stars instead. Topics include an overview of the theoretical physics of black holes, such as Einstein's field equations from his general relativity theory, a description and analysis of ...
BARCELO' C +3 more
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The article discusses the prevention of the formation of black holes as a result of quantum effects and how these effects may give rise to dense entities called black stars instead. Topics include an overview of the theoretical physics of black holes, such as Einstein's field equations from his general relativity theory, a description and analysis of ...
BARCELO' C +3 more
openaire +3 more sources
Nature, 1990
Astronomers are among the most international of scientists. Yet chauvinism surfaces on a cosmic scale where the anxious search for a massive black hole at the centre of our Galaxy is concerned. The prodigious amounts of energy emitted from tiny regions at the centres of some nearby galaxies imply that they contain accreting black holes of ...
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Astronomers are among the most international of scientists. Yet chauvinism surfaces on a cosmic scale where the anxious search for a massive black hole at the centre of our Galaxy is concerned. The prodigious amounts of energy emitted from tiny regions at the centres of some nearby galaxies imply that they contain accreting black holes of ...
openaire +2 more sources
2009
Abstract A black hole is an object that is inside its event horizon at r=r*: a one-way surface that particles and light can only traverse inward. This chapter studies the spherically symmetric nonrotating Schwarzschild black hole. The metric elements change their respective signs when crossing from r>r∗ to r<r*, leading to ...
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Abstract A black hole is an object that is inside its event horizon at r=r*: a one-way surface that particles and light can only traverse inward. This chapter studies the spherically symmetric nonrotating Schwarzschild black hole. The metric elements change their respective signs when crossing from r>r∗ to r<r*, leading to ...
openaire +1 more source
When is a black hole not a black hole?
New Scientist, 2019When it's an astrophysical black hole, of course.
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Soviet Physics Journal, 1989
This work presents a resolution of the causality paradox formulated by T. D. Lee in the theory of the Unruh effect and in the theory of black holes. The basis of the resolution is to take into account the transformation of a pure state into a mixed state in a measurement, which leads to a corresponding modification of the Bogolyubov transformations, so
openaire +1 more source
This work presents a resolution of the causality paradox formulated by T. D. Lee in the theory of the Unruh effect and in the theory of black holes. The basis of the resolution is to take into account the transformation of a pure state into a mixed state in a measurement, which leads to a corresponding modification of the Bogolyubov transformations, so
openaire +1 more source