Tag: Phenomena

Nonlinear Field Theories And Unexplained Phenomena In Nature


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by Alexander S Rabinowitch

English | 2023 | ISBN: 9811264112 | 322 pages | True PDF | 11.03 MB
The book is devoted to several topical questions in modern mathematical and theoretical physics, astrophysics, geophysics, and cosmology that remain unsolved within the framework of the standard approaches. To them, one can attribute unexplained properties of the magnetic fields of stars and planets, puzzles of the Earth’s atmosphere, the phenomenon of ball lightning, the problem of a qualitative description for nuclear forces and their well-known property of saturation, enigmatic properties of spiral galaxies, the problem of the cosmological singularity, mysteries of the dark matter and dark energy, amongst others. To find theoretical ways for understanding such phenomena, new nonlinear generalizations of the classical field theories and advanced methods to solve nonlinear equations arising in them are studied and presented in this book.

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Mass, Momentum and Energy Transport Phenomena A Consistent Balances Approach (De Gruyter Textbook)


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by Harry Van den Akker, Robert F. Mudde

English | 2023 | ISBN: 311124623X | 310 pages | True PDF EPUB | 23.53 MB
A treatment of the transport and transfer processes of heat, mass and momentum in terms of their analogy. The processes are described with the help of macro and micro balances which in many cases lead to differential equations. This way, the textbook also prepares for Computational Fluid Dynamics techniques. The topics of the five chapters of the textbook The leading idea behind this textbook is to train students in solving problems where transport phenomena are key. To this end, the textbook comprises almost 80 problems with solutions.

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Introduction to Ultrafast Phenomena From Femtosecond Magnetism to High-Harmonic Generation


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by Zhang, Guo-ping;Lefkidis, Georgios;Murakami, Mitsuko;Hübner, Wolfgang;George, Thomas F.;

English | 2021 | ISBN: 1498764282 | 320 pages | True PDF EPUB | 51.03 MB
This book, the first of this kind, provides a comprehensive introduction to ultrafast phenomena, covering the fundamentals of ultrafast spin and charge dynamics, femtosecond magnetism, all-optical spin switching, and high-harmonic generation. It covers the experimental tools, including ultrafast pump-probe experiments, and theoretical methods including quantum chemistry and density functional theory, both time-independent and time-dependent. The authors explain in clear language how an ultrafast laser pulse is generated experimentally, how it can induce rapid responses in electrons and spins in molecules, nanostructures and solids (magnetic materials and superconductors), and how it can create high-harmonic generation from atoms and solids on the attosecond timescale. They also show how this field is driving the next generation of magnetic storage devices through femtomagnetism, all-optical spin switching in ferrimagnets and beyond, magnetic logic in magnetic molecules, and ultrafast intense light sources, incorporating numerous computer programs, examples, and problems throughout, to show how the beautiful research can be done behind the scene. Key features: Provides a clear introduction to modern ultrafast phenomena and their applications in physics, chemistry, materials sciences, and engineering. Presents in detail how high-harmonic generation occurs in atoms and solids. Explains ultrafast demagnetization and spin switching, a new frontier for development of faster magnetic storage devices. Includes numerous worked-out examples and problems in each chapter, with real research codes in density functional theory and quantum chemical calculations provided in the chapters and in the Appendices. This book is intended for undergraduate and graduate students, researchers in physics, chemistry, biology, materials sciences, and engineering. This book provides a comprehensive introduction to ultrafast phenomena, covering the fundamentals of ultrafast spin and charge dynamics, key methods, and applications in physics, chemistry, and materials science. The authors explain in clear language how an ultrafast laser pulse can induce rapid responses in electrons and spins in solids and nanostructured materials. They also show how this field is driving the next generation of magnetic storage devices and ultrafast intense light sources, incorporating numerous examples and problems throughout.

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Collective Phenomena in Plasmas and Elsewhere Kinetic and Hydrodynamic Approaches


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by Ourabah, Kamel;

English | 2023 | ISBN: 1786307693 | 192 pages | True PDF | 55.05 MB
The Universe is made up of systems consisting of a very large number of particles interacting in a very complex way. When studying these systems, a precise microscopic approach is unattainable. In practice, the best strategy is one that is able to "distinguish" between superfluous information and the information needed to make predictions about the evolution of the system. There are two main competing kinetic and hydrodynamic.

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Classical and Quantum Parametric Phenomena (Oxford Graduate Texts)


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by Eichler, Alexander;Zilberberg, Oded;

English | 2023 | ISBN: 0192862707 | 193 pages | True PDF | 9.84 MB
Classical and Quantum Parametric Phenomena provides an overview of the phenomena arising when parametric pumping is applied to oscillators. These phenomena include parametric amplification, noise squeezing, spontaneous symmetry breaking, activated switching, cat states, and synthetic Ising spin lattices. To understand these effects, topics such as nonlinear and stochastic dynamics, coupled systems, and quantum mechanics are introduced. Throughout the book, introductions are kept as succinct as possible and attention is focused on understanding parametric oscillators. As a result, the text helps readers to familiarize themselves with many aspects of parametric systems and understand the common theoretical origin of nanomechanical sensors, optical amplifiers, and superconducting qubits.

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UFOs Unidentified Aerial Phenomena


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English | 2023 | ISBN: 3031343972 | 479 Pages | PDF EPUB (True) | 35 MB
Unidentified phenomena in space, in the Earth’s atmosphere, and in waters are too important to leave their exploration to the military and scientific laypersons. Their proper scientific study is important for a variety of reasons; in particular, scientists and the public at large need to know the basic facts, to be informed about the way evidence is recorded, and to understand the difference been reliable evidence and fiction, as well as between plausible explanations and fantasy.

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Liquid-Vapor Phase-Change Phenomena, 3rd Edition


Free Download Liquid-Vapor Phase-Change Phenomena: An Introduction to the Thermophysics of Vaporization and Condensation Processes in Heat Transfer Equipment, 3rd Edition by Van P. Carey
English | February 28, 2020 | ISBN: 149871661X | True EPUB/PDF | 706pages | 18.2/123 MB
Since the second edition of Liquid-Vapor Phase-Change Phenomena was written, research has substantially enhanced the understanding of the effects of nanostructured surfaces, effects of microchannel and nanochannel geometries, and effects of extreme wetting on liquid-vapor phase-change processes.

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Computer Simulation Study of Collective Phenomena in Dense Suspensions of Red Blood Cells under Shear


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English | PDF | 2012 | 169 Pages | ISBN : 3834823759 | 2.6 MB
The rheology of dense red blood cell suspensions is investigated via computer simulations based on the lattice Boltzmann, the immersed boundary, and the finite element methods. The red blood cells are treated as extended and deformable particles immersed in the ambient fluid. In the first part of the work, the numerical model and strategies for stress evaluation are discussed. In the second part, the behavior of the suspensions in simple shear flow is studied for different volume fractions, particle deformabilities, and shear rates. Shear thinning behavior is recovered. The existence of a shear-induced transition from a tumbling to a tank-treading motion is demonstrated. The transition can be parameterized by a single quantity, namely the effective capillary number. It is the ratio of the suspension stress and the characteristic particle membrane stress. At the transition point, a strong increase in the orientational order of the red blood cells and a significant decrease of the particle diffusivity are observed. However, the average cell deformation shows no signature of the transition.

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