Summary Analogue models are actual physical setups used to model something else. They are especially useful when what we wish to investigate is difficult to observe or experiment upon due to size or distance in space or time: for example, if the thing we wish to investigate is too large, too far away, takes place on a time scale that is too long, does not yet exist or has ceased to exist. The range and variety of analogue models is too (...) extensive to attempt a survey. In this article, I describe and discuss several different analogue model experiments, the results of those model experiments, and the basis for constructing them and interpreting their results. Examples of analogue models for surface waves in lakes, for earthquakes and volcanoes in geophysics, and for black holes in general relativity, are described, with a focus on examining the bases for claims that these analogues are appropriate analogues of what they are used to investigate. A table showing three different kinds of bases for reasoning using analogue models is provided. Finally, it is shown how the examples in this article counter three common misconceptions about the use of analogue models in physics. (shrink)

Revista Intelligence Info este o publicație trimestrială din domeniile intelligence, geopolitică și securitate, și domenii conexe de studiu și practică. -/- Cuprins: -/- EDITORIAL / EDITORIAL -/- Nicolae SFETCU The Role of Polanyi’s Tacit Knowledge in Intelligence Analysis Rolul cunoașterii tacite a lui Polanyi în analiza informațiilor -/- INTELLIGENCE / INTELLIGENCE -/- Tănase TIBERIU Principles, methods and means of intelligence activity in the Russian Federation and Israel Principii, metode și mijloace ale activității informative în Federația Rusă și Israel -/- Tănase (...) TIBERIU Considerations on intelligence and anticipation Considerații privind intelligence și anticiparea -/- ISTORIA / HISTORY -/- Tănase TIBERIU The continuity of the KGB in the 20th century – Descendants of the KGB Continuitatea KGB-lui în secolul XX –Urmașele KGB ului -/- Lucian Ștefan COZMA, Daniela Georgiana GOLEA The Real History of the Romteleghid Project: 1 – Geophysical Aggression Istoria reală a proiectului Romteleghid: 1 – Agresiunea geofizică -/- GEOPOLITICA / GEOPOLITICS -/- Emilian M. DOBRESCU Rare Earths in Other Countries Except China Pământuri rare în alte țări, cu excepția Chinei -/- SECURITATE / SECURITY -/- Nicolae SFETCU Advanced Cognitive Electronic Warfare: Enhancing Strategic Superiority Through Intelligent Systems Războiul electronic cognitiv avansat: sporirea superiorității strategice prin sisteme inteligente -/- ȘTIINȚA INFORMAȚIEI / INFORMATION SCIENCE -/- Nicolae SFETCU The Influence of Artificial Intelligence on Human Activity and Human Intelligence Influența inteligenței artificiale asupra activității umane și a inteligenței umane -/- ISSN 2821-8159 ISSN-L 2821-8159, DOI: 10.58679/II12575. (shrink)

In contemporary mathematics, a Colombeau algebra of Colombeau generalized functions is an algebra of a certain kind containing the space of Schwartz distributions. While in classical distribution theory a general multiplication of distributions is not possible, Colombeau algebras provide a rigorous framework for this. Remark 1.1.1.Such a multiplication of distributions has been a long time mistakenly believed to be impossible because of Schwartz’ impossibility result, which basically states that there cannot be a differential algebra containing the space of distributions and (...) preserving the product of continuous functions. However, if one only wants to preserve the product of smooth functions instead such a construction becomes possible, as demonstrated first by J.F.Colombeau [1],[2]. As a mathematical tool, Colombeau algebras can be said to combine a treatment of singularities, differentiation and nonlinear operations in one framework, lifting the limitations of distribution theory. These algebras have found numerous applications in the fields of partial differential equations, geophysics, microlocal analysis and general relativity so far. (shrink)

This book is inspired by a German theoretical physicist, Sabine Hossenfelder’s publication: “Lost in Mathematics”. Her book seems to question highly mathematical and a lot of abstraction in the development of physics and cosmology studies nowadays. There is clear tendency that in recent decades, the physics science has been predominated by such an advanced mathematics, which at times sounding more like acrobatics approach to a reality. Through books by senior mathematical-physicists like Unzicker and Peter Woit, we know that the answer (...) of TOE is not in superstring theories or other variations of such 26 dimensional bosonic string theory, of which none of those theories survived experimental test, but perhaps in low dimensional physics. As Alexander Unzicker suggests, perhaps it is more advisable to consider rotation in 3D space (known as SO3), or a kind of superfluid vortices version of gravitation theory. We can also reconsider proposition by the late Prof F. Winterberg (formerly professor at Univ. Nevada, Reno), that it is most likely that superfluid phonon roton theory in 3D can replace the entire superstring theories. While we don’t explore yet implications of his model to particle physics, we discuss here some published papers at several journals in the past few years. (shrink)

There are many parts of science in which a certain sort of underdetermination of theory by evidence is known to be common. It is argued that reflection on this fact should serve to shift the burden of proof from scientific anti-realists to scientific realists at a crucial point in the debate between them.

The paper points out two levels of meaning of the term anthropocene, which is directly related to the human impact on the state of the global ecosystem. This influence is reflected on the one hand in the field of natural sciences, where the term anthropocene denotes a new stage in the geological history of the Earth. On the other hand, in the field of humanities, the concept of anthropocene has become the starting point for theoretical analyzes of the direct relationship (...) between the environmental assumptions of the existence of civilization and human action, the consequences of which threaten these assumptions. In both approaches, man is considered to be the direct cause of changes in the Earth‘s ecosystem. The paper points out the importance of interconection of the both two levels of meaning of the term anthropocene. (shrink)

Geoscience research may upset people even though it is ethically acceptable. In this paper we attempt to explore three questions about such research. It will turn out that (1) under most circumstances ethical but upsetting geoscience research is morally permissible, (2) revising this research in response to upset-induced external interference is morally impermissible in the absence of strong countervailing pragmatic reasons and attempts to reduce upset, and (3) potentially upsetting geoscience research ought to be communicated truthfully and tailored to each (...) individual situation. These general propositions are applied to a case of ethical but upsetting research that we ourselves are currently involved. (shrink)