The theory of elasticity

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The theory of elasticity offers us more complicated equations, but which do not differ much from the preceding ones. We still have three unknown functions u, v, w, to which I will add the auxiliary function Θ = du/dx + … Read More

Henri Poincaré: On the Partial Differential Equations of Mathematical Physics – Law of cooling of an isolated solid body in space

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Suppose we are looking for the law of cooling of an isolated solid body in space. It will be a question of finding a function V satisfying the equation dV/dt = kΔV, and which moreover is given for t = … Read More

Drobeta Turnu Severin Heavy Water Plant: Construction

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Sfetcu, Nicolae (2023), Drobeta Turnu Severin Heavy Water Plant: Construction, Cunoașterea Științifică, 2:1, DOI: 10.58679/CS96723, https://www.cunoasterea.ro/drobeta-turnu-severin-heavy-water-plant-construction/   Abstract The heavy water plant was established under the name of Combinatul Chimic Drobeta, by Decree 400/16.11.1979, under the Inorganic Products Industrial Center … Read More

Poincaré: On the Partial Differential Equations of Mathematical Physics – Laplace equation for magnets

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Suppose one or more permanent magnets placed in the presence of a perfectly magnetically soft body M. It is a question of finding a function V (the magnetic potential) which satisfies the Laplace equation in all the portion of space … Read More

Heavy water in Romania: Scientific and technological research, and plant design

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Sfetcu, Nicolae, “Heavy water in Romania: Scientific and technological research, and plant design”, in Telework (January 08. 2023), DOI: 10.13140/RG.2.2.36803.68642, https://www.telework.ro/en/heavy-water-in-romania-scientific-and-technological-research-and-plant-design/   Abstract The National Nuclear Program, the studies of specialized institutes and commercial treaties with other countries, based on … Read More

Poincaré: The problem of the pulsating spheres of Bjerknes

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We will first cite the following problem; a liquid is contained in a vessel which it completely fills; various moving solid bodies are immersed in this liquid; we know the movements of these bodies and we suppose that there is … Read More

Heavy Water – Overview

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Sfetcu, Nicolae, ” Heavy Water – Overview”, in Telework (2022), DOI: 10.13140/RG.2.2.31649.28003, https://www.telework.ro/en/heavy-water-overview/   Abstract An overview of heavy water: definition, properties, uses (with emphasis on the use of heavy water in nuclear reactors as a moderator and coolant). Technologies … Read More

Henri Poincaré, Mathematical physics: 1 – Dirichlet’s problem

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When we consider the various problems of integral calculus which naturally arise when we want to go deeper into the most different parts of physics, it is impossible not to be struck by the analogies that all these problems present … Read More

Future of Science – Science of Science

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Sfetcu, Nicolae (2022). Future of Science – Science of Science, DOI: 10.13140/RG.2.2.13183.69285, in Telework: https://www.telework.ro/en/future-of-science-science-of-science/   Abstract What will science look like in the near future? First, very closely coupled with, even dependent on, technology. Second, three factors will strongly … Read More

Fine tuning argument for the existence of God: Appearance of heavy elements in the Universe and tuning the fundamental forces of our universe

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Appearance of heavy elements in the Universe Heavy elements 98% of visible matter is made up of hydrogen and helium. All the other elements (heavy elements: carbon, iron, oxygen in particular which are the constituents of organic matter and therefore … Read More

Some scientific methods

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Bayesian reasoning Bayesian reasoning is a method based on inferences. This reasoning builds from observations a probability of the cause of a given event. The adjective “Bayesian” comes from British mathematician Thomas Bayes (1702-1761). It is him who formulated Bayes’ … Read More

Inside, and Beyond „Nothingness”

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A brief introduction to the subquantum regime, where the origination of all the observable events and processes of tour physical world can be found. Descending along the scale supplied by the divisibility of Quanta toward increasingly fine structures bearing fractional … Read More

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