00917nam a22002531i 450099100147266970753620030109154156.0030109s1984 it |||||||||||||||||ita b12151853-39ule_instARCHE-024165ExLDip.to Filologia Ling. e Lett.itaA.t.i. Arché s.c.r.l. Pandora Sicilia s.r.l.296.8332Wiesel, Elie280901Contro la malinconia :celebrazione hassidica 2. /Elie WieselMilano :Spirali,1984221 p. ;20 cmL'alingua ;32Hasidismo.b1215185302-04-1401-04-03991001472669707536LE008 FL.M. (IN) M 7212008000176686le008-E0.00-l- 00000.i1248064201-04-03Contro la malinconia146502UNISALENTOle00801-04-03ma -itait 0105320nam 2200661Ia 450 991101974300332120200520144314.09786610519842978128051984012805198439783527603817352760381697835276045553527604553(CKB)1000000000376922(EBL)482144(OCoLC)68623594(SSID)ssj0000232272(PQKBManifestationID)11187955(PQKBTitleCode)TC0000232272(PQKBWorkID)10213742(PQKB)10963151(MiAaPQ)EBC482144(Perlego)2766952(EXLCZ)99100000000037692220040429d2004 uy 0engur|n|---|||||txtccrRadio wave propagation in the marine boundary layer /Alexander KukushkinWeinheim Wiley-VCH ;[Chichester John Wiley]c20041 online resource (207 p.)Description based upon print version of record.9783527404582 3527404589 Includes bibliographical references and index.Radio Wave Propagation in the Marine Boundary Layer; Preface; Contents; 1 Atmospheric Boundary Layer and Basics of the Propagation Mechanisms; 1.1 Standard Model of the Troposphere; 1.2 Non-standard Mechanisms of Propagation; 1.2.1 Evaporation Duct; 1.2.2 Elevated M-inversion; 1.3 Random Component of Dielectric Permittivity; 1.3.1 Locally Uniform Fluctuations; References; 2 Parabolic Approximation to the Wave Equation; 2.1 Analytical Methods in the Problems of Wave Propagation in a Stratified and Random Medium2.2 Parabolic Approximation to a Wave Equation in a Stratified Troposphere Filled with Turbulent Fluctuations of the Refractive Index2.3 Green Function for a Parabolic Equation in a Stratified Medium; 2.4 Feynman Path Integrals in the Problems of Wave Propagation in Random Media; 2.5 Numerical Methods of Parabolic Equations; 2.6 Basics of Focks Theory; 2.7 Focks Theory of the Evaporation Duct; References; 3 Wave Field Fluctuations in Random Media over a Boundary Interface; 3.1 Reflection Formulas for the Wave Field in a Random Medium over an Ideally Reflective Boundary3.1.1 Ideally Reflective Flat Surface3.1.2 Spherical Surface; 3.2 Fluctuations of the Waves in a Random Non-uniform Medium above a Plane with Impedance Boundary Conditions; 3.3 Comments on Calculation of the LOS Field in the General Situation; References; 4 UHF Propagation in an Evaporation Duct; 4.1 Some Results of Propagation Measurements and Comparison with Theory; 4.2 Perturbation Theory for the Spectrum of Normal Waves in a Stratified Troposphere; 4.2.1 Problem Formulation; 4.2.2 Linear Distortion; 4.2.3 Smooth Distortion; 4.2.4 Height Function4.2.5 Linear-Logarithmic Profile at Heights Close to the Sea Surface4.3 Spectrum of Normal Waves in an Evaporation Duct; 4.4 Coherence Function in a Random and Non-uniform Atmosphere; 4.4.1 Approximate Extraction of the Eigenwave of the Discrete Spectrum in the Presence of an Evaporation Duct; 4.4.2 Equations for the Coherence Function; 4.5 Excitation of Waves in a Continuous Spectrum in a Statistically Inhomogeneous Evaporation Duct; 4.6 Evaporation Duct with Two Trapped Modes; References; 5 Impact of Elevated M-inversions on the UHF/EHF Field Propagation beyond the Horizon5.1 Modal Representation of the Wave Field for the Case of Elevated M-inversion5.2 Hybrid Representation; 5.2.1 Secondary Excitation of the Evaporation Duct by the Waves Reflected from an Elevated Refractive Layer; 5.3 Comparison of Experiment with the Deterministic Theory of the Elevated Duct Propagation; 5.4 Excitation of the Elevated Duct due to Scattering on the Fluctuations in the Refractive Index; References; 6 Scattering Mechanism of Over-horizon UHF Propagation; 6.1 Basic Equations; 6.2 Perturbation Theory: Calculation of Field Moments6.3 Scattering of a Diffracted Field on the Turbulent Fluctuations in the Refractive IndexBased on his many years of professional experience at leading companies in communications technology, the author describes an analytical solution for wave propagation over the sea surface in an atmospheric boundary layer. His approach allows the detailed analysis of combined effects of diffraction, refraction and scattering in random media. While specific applications covered are targeted at radio wave propagation over the sea surface, a similar approach is applicable to many problems in underwater acoustics, seismology, solid matter physics and astrophysics.Radio wave propagationMathematical modelsRadio wave propagationComputer simulationRadio wave propagationMathematical models.Radio wave propagationComputer simulation.621.38411Kukushkin Alexander1637320MiAaPQMiAaPQMiAaPQBOOK9911019743003321Radio wave propagation in the marine boundary layer4422181UNINA