The Method Of The Generalised Eikonal

Author : Michael V. Vesnik
Publisher : Walter de Gruyter GmbH & Co KG
Page : 212 pages
File Size : 52,8 Mb
Release : 2015-07-24
Category : Science
ISBN : 9783110311297

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The Method of the Generalised Eikonal by Michael V. Vesnik Pdf

Diffraction theory describes scattering mechanisms for waves of various physical nature, scattered by objects of different shapes and materials. This book proposes new methods to account for the contour shape, edge profile and boundary conditions of three-dimensional scatterers (in particularly, flat polygons and polyhedrals). A standard method to refine the physical optics approximation (PO) is the heuristic method of edge waves (MEW). In comparison with MEW, the presented approaches simplify the solving and refining the PO approximation without solving a corresponding two-dimensional problem. Furthermore these methods allow to take into account the field perturbation in the vicinity of vertices. While the analytical formulas obtained by using these new approaches are as simple as in the PO case, the accuracy can be even higher than for MEW. On the basis of the developed methods construction of solutions for wave propagation in urban area and elastic wave diffraction (including seismic waves) are proposed. The book is useful for specialists who solve scientific and engineering problems in wave propagation and for students and postgraduate students.

Author : D A Bradley,S P Chia
Publisher : World Scientific
Page : 698 pages
File Size : 50,8 Mb
Release : 2000-11-24
Category : Science
ISBN : 9789814542722

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Frontiers Of Physics 1998, Proceedings Of The Intl Mtg by D A Bradley,S P Chia Pdf

Contents:Progress of RFQ and Superconducting Accelerators in China (C E Chen et al.)QCD Phase Transition in the Laboratory and in the Early Universe (B Sinha)Frontiers in Ultrafast Laser Science (W Sibbett)Asymmetries of Sea Quark Distributions in Baryons (M Alberg et al.)A Variational Approach to Many-Particle Systems (C K Kim et al.)Synchrotron Radiation Activities at KEK (M Kihara)Results of the UNU/ICTP PFF Network (S Lee)New Generation Positron-Atom Scattering Theories (K Ratnavelu)Superconducting Pairing of Quarks in QCD (N V Hieu & L T Tuong)Photon-Gated Persistent Spectral Hole Burning (Y X Nie & L Z Zhao)Wind Driven Circulation of the South China Sea (A Camerlengo)Effect of Soil Type on Environmental Terrestrial Gamma Radiation Dose in Johor State, Malaysia (A T Ramli et al.)Research in Optical Fibres Devices at Telekom Malaysia Photonics Laboratory (H B Ahmad et al.)Simplifying Complexity (W A T Wan Abdullah)Gravitational Wave Detection in the Laboratory (Y T Chen et al.)and other papers Readership: Theoretical physicists.

Author : Martin Weiser
Publisher : Walter de Gruyter GmbH & Co KG
Page : 157 pages
File Size : 41,8 Mb
Release : 2016-05-10
Category : Mathematics
ISBN : 9783110386189

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Inside Finite Elements by Martin Weiser Pdf

All relevant implementation aspects of finite element methods are discussed in this book. The focus is on algorithms and data structures as well as on their concrete implementation. Theory is covered only as far as it gives insight into the construction of algorithms. In the exercises, a complete FE-solver for stationary 2D problems is implemented in Matlab/Octave. Contents: Finite Element Fundamentals Grids and Finite Elements Assembly Solvers Error Estimation Mesh Refinement Multigrid Elastomechanics Fluid Mechanics Grid Data Structure Function Reference

Author : Alexander M. Formalskii
Publisher : Walter de Gruyter GmbH & Co KG
Page : 255 pages
File Size : 53,6 Mb
Release : 2015-11-13
Category : Science
ISBN : 9783110392821

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Stabilisation and Motion Control of Unstable Objects by Alexander M. Formalskii Pdf

Systems with mechanical degrees of freedom containing unstable objects are analysed in this monograph and algorithms for their control are developed, discussed, and numerically tested. This is achieved by identifying unstable modes of motion and using all available resources to suppress them. By using this approach the region of states from which a stable regime can be reached is maximised. The systems discussed in this book are models for pendula and vehicles and find applications in mechatronics, robotics as well as in mechanical and automotive engineering.

Author : Abram I. Fet
Publisher : Walter de Gruyter GmbH & Co KG
Page : 193 pages
File Size : 52,9 Mb
Release : 2016-09-12
Category : Science
ISBN : 9783110475203

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Group Theory of Chemical Elements by Abram I. Fet Pdf

In this monograph, group-theoretical approaches are used to build a system of hadrons and qualitatively describe the properties of chemical compounds. This serves as a complement to numerically and approximately solve the many-electron Schrödinger equation, in order to understand the behavior of chemical elements. Besides general theory, specific results are compared with experimentally measured chemical properties.

Author : Sabrine Arfaoui,Imen Rezgui,Anouar Ben Mabrouk
Publisher : Walter de Gruyter GmbH & Co KG
Page : 156 pages
File Size : 41,8 Mb
Release : 2017-03-20
Category : Mathematics
ISBN : 9783110481242

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Wavelet Analysis on the Sphere by Sabrine Arfaoui,Imen Rezgui,Anouar Ben Mabrouk Pdf

The goal of this monograph is to develop the theory of wavelet harmonic analysis on the sphere. By starting with orthogonal polynomials and functional Hilbert spaces on the sphere, the foundations are laid for the study of spherical harmonics such as zonal functions. The book also discusses the construction of wavelet bases using special functions, especially Bessel, Hermite, Tchebychev, and Gegenbauer polynomials.

Author : Vladimir K. Dobrev
Publisher : Walter de Gruyter GmbH & Co KG
Page : 421 pages
File Size : 52,7 Mb
Release : 2016-09-12
Category : Mathematics
ISBN : 9783110427646

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Noncompact Semisimple Lie Algebras and Groups by Vladimir K. Dobrev Pdf

With applications in quantum field theory, elementary particle physics and general relativity, this two-volume work studies invariance of differential operators under Lie algebras, quantum groups, superalgebras including infinite-dimensional cases, Schrödinger algebras, applications to holography. This first volume covers the general aspects of Lie algebras and group theory supplemented by many concrete examples for a great variety of noncompact semisimple Lie algebras and groups. Contents:IntroductionLie Algebras and GroupsReal Semisimple Lie AlgebrasInvariant Differential OperatorsCase of the Anti-de Sitter GroupConformal Case in 4DKazhdan–Lusztig Polynomials, Subsingular Vectors, and Conditionally Invariant EquationsInvariant Differential Operators for Noncompact Lie Algebras Parabolically Related to Conformal Lie AlgebrasMultilinear Invariant Differential Operators from New Generalized Verma ModulesBibliographyAuthor IndexSubject Index

Author : Alexander Kokhanovsky
Publisher : Springer
Page : 299 pages
File Size : 40,5 Mb
Release : 2017-12-22
Category : Science
ISBN : 9783319708089

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Springer Series in Light Scattering by Alexander Kokhanovsky Pdf

This book presents a survey of modern theoretical and experimental techniques in studies of light scattering phenomena and radiative transfer processes in random media. It presents reviews on light scattering by sea water and bubbles, and includes a separate chapter addressing studies of the remote sensing of crystalline clouds with a focus on the shape of particles—a parameter rarely studied by passive remote sensing techniques. In particular, it offers a comprehensive analysis of polarized radiative transfer in optically active (e.g., chiral) light scattering media and explores advances in spectro-polarimetry of particulate media. Lastly it discusses new developments in light scattering for combustion monitoring.

Author : Alexander V. Bogdanov,German V. Dubrovskiy,Michael P. Krutikov,Dmitry V. Kulginov,Victor M. Strelchenya
Publisher : Springer Science & Business Media
Page : 140 pages
File Size : 54,9 Mb
Release : 2008-09-11
Category : Science
ISBN : 9783540491071

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Interaction of Gases with Surfaces by Alexander V. Bogdanov,German V. Dubrovskiy,Michael P. Krutikov,Dmitry V. Kulginov,Victor M. Strelchenya Pdf

Interface phenomena are most fascinating because of the mixing of different scales and the interference of diverse physical processes. This makes it necessary to use different levels of description: microscopic, kinetic, and gas-dynamical. A unified quasiclassical approach is used to answer practical questions dealing with inelastic gas-surface scattering, the kinetics of adsorption layers, the evolution of inhomogeneities and defects at the surface, the Knudsen layer, the development of boundary conditions on the kinetic and gas-dynamical levels, the determination of exchange and slip coefficients, and so on.

Author : Ru-Shan Wu,Valerie Maupin
Publisher : Elsevier
Page : 626 pages
File Size : 48,8 Mb
Release : 2006-12-14
Category : Science
ISBN : 0080466354

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Advances in Geophysics by Ru-Shan Wu,Valerie Maupin Pdf

Significant progress in our understanding of the Earth's structure and functioning is dependent on new and original observations. However, these observations cannot be interpreted in a quantitative way without tools to model them, and developing adequate modelling methods is also a prerequisite for progress. Seismological raw data in the 21st century are mostly three-component broadband recordings, and require advanced numerical tools to be modelled, especially if lateral variations in the model are accounted for in addition to the radial stratification of the Earth. Considerable progress has been made concerning modelling of elastic waves in laterally heterogeneous structures in the last decades, taking advantage of the development of computer power. The number of articles related to new developments of diverse methods is enormous and it can be very difficult for newcomers to get an overview of the different methods available, and to be able to find which method is most appropriate for his or her applications. This book aims at giving introductions and basic reviews of the modelling methods for elastic waves in laterally heterogeneous structures which are most commonly used in contemporary seismology, or may have great potential for the future.

Author : Anonim
Publisher : Unknown
Page : 934 pages
File Size : 51,9 Mb
Release : 1976
Category : Nuclear energy
ISBN : PSU:000047758865

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Nuclear Science Abstracts by Anonim Pdf

Author : Rozmus W,Tuszynski Jack A
Publisher : #N/A
Page : 640 pages
File Size : 48,6 Mb
Release : 1991-07-22
Category : Electronic
ISBN : 9789814569798

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Nonlinear And Chaotic Phenomena In Plasmas, Solids And Fluids - Proceedings Of The Conference by Rozmus W,Tuszynski Jack A Pdf

Author : Paolo Russo
Publisher : CRC Press
Page : 1477 pages
File Size : 53,8 Mb
Release : 2017-12-14
Category : Medical
ISBN : 9781498741545

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Handbook of X-ray Imaging by Paolo Russo Pdf

Containing chapter contributions from over 130 experts, this unique publication is the first handbook dedicated to the physics and technology of X-ray imaging, offering extensive coverage of the field. This highly comprehensive work is edited by one of the world’s leading experts in X-ray imaging physics and technology and has been created with guidance from a Scientific Board containing respected and renowned scientists from around the world. The book's scope includes 2D and 3D X-ray imaging techniques from soft-X-ray to megavoltage energies, including computed tomography, fluoroscopy, dental imaging and small animal imaging, with several chapters dedicated to breast imaging techniques. 2D and 3D industrial imaging is incorporated, including imaging of artworks. Specific attention is dedicated to techniques of phase contrast X-ray imaging. The approach undertaken is one that illustrates the theory as well as the techniques and the devices routinely used in the various fields. Computational aspects are fully covered, including 3D reconstruction algorithms, hard/software phantoms, and computer-aided diagnosis. Theories of image quality are fully illustrated. Historical, radioprotection, radiation dosimetry, quality assurance and educational aspects are also covered. This handbook will be suitable for a very broad audience, including graduate students in medical physics and biomedical engineering; medical physics residents; radiographers; physicists and engineers in the field of imaging and non-destructive industrial testing using X-rays; and scientists interested in understanding and using X-ray imaging techniques. The handbook's editor, Dr. Paolo Russo, has over 30 years’ experience in the academic teaching of medical physics and X-ray imaging research. He has authored several book chapters in the field of X-ray imaging, is Editor-in-Chief of an international scientific journal in medical physics, and has responsibilities in the publication committees of international scientific organizations in medical physics. Features: Comprehensive coverage of the use of X-rays both in medical radiology and industrial testing The first handbook published to be dedicated to the physics and technology of X-rays Handbook edited by world authority, with contributions from experts in each field

Author : Eduardo García-Río,D.N. Kupeli
Publisher : Springer Science & Business Media
Page : 203 pages
File Size : 54,7 Mb
Release : 2013-06-29
Category : Mathematics
ISBN : 9789401729796

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Semi-Riemannian Maps and Their Applications by Eduardo García-Río,D.N. Kupeli Pdf

A major flaw in semi-Riemannian geometry is a shortage of suitable types of maps between semi-Riemannian manifolds that will compare their geometric properties. Here, a class of such maps called semi-Riemannian maps is introduced. The main purpose of this book is to present results in semi-Riemannian geometry obtained by the existence of such a map between semi-Riemannian manifolds, as well as to encourage the reader to explore these maps. The first three chapters are devoted to the development of fundamental concepts and formulas in semi-Riemannian geometry which are used throughout the work. In Chapters 4 and 5 semi-Riemannian maps and such maps with respect to a semi-Riemannian foliation are studied. Chapter 6 studies the maps from a semi-Riemannian manifold to 1-dimensional semi- Euclidean space. In Chapter 7 some splitting theorems are obtained by using the existence of a semi-Riemannian map. Audience: This volume will be of interest to mathematicians and physicists whose work involves differential geometry, global analysis, or relativity and gravitation.

Author : Alexander A. Kokhanovsky
Publisher : Springer Science & Business Media
Page : 509 pages
File Size : 48,8 Mb
Release : 2006-09-03
Category : Science
ISBN : 9783540376729

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Light Scattering Reviews by Alexander A. Kokhanovsky Pdf

This book provides an account of recent developments in light scattering media optics. Leading researchers focus on both the theoretical and experimental results in the area. In particular, light scattering by ice crystals, soil particles and biological particles is considered. This volume first discusses single light scattering, followed by multiple light scattering and finally examines possible applications in combustion and marine research.