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Birds are among the most extensively studied of all animal groups. Hundreds of academic journals and thousands of scientists are devoted to bird research, while amateur enthusiasts (called birdwatchers or, more commonly, birders) probably number in the millions. Birds are … Read More
The post The Birds World appeared first on MultiMedia.
The contemporary security environment has increasingly unpredictable mutations and the international scene seems to be gripped by a conflict that threatens to erupt at any moment, becoming an open conflict, violent and able to spread quickly everywhere; although for decades … Read More
The post The Security Management System from the Perspective of the Global Energy Crisis and the Extended Black Sea Region Escalating Conflict appeared first on MultiMedia.
In common usage, the terms “electronic book” and “ebook” designate both the content (the text itself) and, by metonymy, the container (the medium allowing the content to be viewed). These two expressions are therefore also synonymous with “reader”. However, this … Read More
The post Types of digital books appeared first on MultiMedia.
The theory of relativity, even “restricted”, is not precisely based on the Michelson-Morley experiment, since it expresses, in a general way, the need to preserve the laws of electromagnetism in an invariable form when passing from one system of reference … Read More
The post Henri Bergson: Half-relativity – Michelson-Morley experiment (1) appeared first on MultiMedia.
The singularities from the general relativity resulting by solving Einstein’s equations were and still are the subject of many scientific debates: Are there singularities in spacetime, or not? Big Bang was an initial singularity? If singularities exist, what is their … Read More
The post The singularities as ontological limits of the general relativity appeared first on MultiMedia.
Suppose that we propose to find a function F which satisfies Laplace’s equation inside the sphere S and which, at the different points M of the surface of this sphere, take given values V°. The value of this function V … Read More
The post Henri Poincaré: Potential of an electric mass distributed on the surface of a sphere (2) appeared first on MultiMedia.