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[null,"1.","Record Nr.",null,"UNINA9910460794103321"]
[null,null,"Autore",null,"Vesnik Michael V."]
[null,null,"Titolo",null,"The method of the generalised eikonal : new approaches in the diffraction theory / / Michael V. Vesnik"]
[null,null,"Pubbl/distr/stampa",null,"Berlin, [Germany] ; ; Boston, [Massachusetts] : , : De Gruyter, , 2015"]
[{"$nulls":4},"©2015"]
[null,null,"ISBN",null,"3-11-031129-1"]
[{"$nulls":4},"3-11-038301-2"]
[null,null,"Descrizione fisica",null,"1 online resource (216 p.)"]
[null,null,"Collana",null,"De Gruyter Studies in Mathematical Physics, , 2194-3532 ; ; Volume 29"]
[null,null,"Disciplina",null,"535/.42"]
[null,null,"Soggetti",null,"Diffraction - Mathematics"]
[{"$nulls":4},"Electronic books."]
[null,null,"Lingua di pubblicazione",null,"Inglese"]
[null,null,"Formato",null,"Materiale a stampa"]
[null,null,null,"Livello bibliografico","Monografia"]
[null,null,null,"Note generali","Description based upon print version of record."]
[null,null,null,"Nota di bibliografia","Includes bibliographical references at the end of each chapters and index."]
[null,null,"Nota di contenuto",null,"Front matter -- Preface -- Contents -- Introduction -- 1 Method of Generalized Eikonal -- 2 Solution of Two-dimensional Problems by the Method of Generalized Eikonal -- 3 Application of Two-dimensional Solutions to Three-dimensional Problems -- 4 Diffraction by a Plane Perfectly Conducting Angular Sector (Heuristic Approach) -- 5 Propagation of Radio Waves in Urban Environment (Deterministic Approach) -- 6 Analytical Heuristic Solution for Wave Diffraction by a Plane Polygonal Scatterer -- 7 Conclusion -- A Application of Stokes Theorem to Diffraction Problems -- B Rigorous Two-dimensional Solution for Diffraction by Half-plane -- C Application of Imaginary Edge in Diffraction Problems -- D Summary of Formulas for Diffraction by Plane Angular Sector -- E Fresnel Integral and its Properties -- F Generalized Fresnel Integral and Its Properties -- G Electromagnetic Wave Diffraction by Semi-transparent Plate in the Physical Optics Approximation -- H Generalized Diffraction Coefficient and its Application to Diffraction Problems -- Bibliography -- Index -- Backmatter"]
[null,null,null,"Sommario/riassunto","Diffraction theory describes scattering mechanisms for waves of various physical nature, scattered by objects of different shapes and materials. This book proposes new methods to account for the contour shape, edge profile and boundary conditions of three-dimensional scatterers (in particularly, flat polygons and polyhedrals). A standard "]
[{"$nulls":4},"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."]
[null,"2.","Record Nr.",null,"UNINA9910494582203321"]
[null,null,"Titolo",null,"Latvia--a work in progress? : 100 years of state- and nation-building / / David J. Smith (ed.)"]
[null,null,"Pubbl/distr/stampa",null,"Stuttgart : , : Ibidem-Verlag, , [2017]"]
[{"$nulls":4},"©2017"]
[null,null,"Descrizione fisica",null,"1 online resource (335 pages)"]
[null,null,"Collana",null,"Soviet and post-Soviet politics and society"]
[null,null,"Disciplina",null,"947.96084"]
[null,null,"Soggetti",null,"Nation-building - Latvia - History - 20th century"]
[{"$nulls":4},"Nation-building - Latvia - History - 21st century"]
[{"$nulls":4},"Electronic books."]
[{"$nulls":4},"Latvia Politics and government 20th century Congresses"]
[{"$nulls":4},"Latvia Politics and government 21st century Congresses"]
[null,null,"Lingua di pubblicazione",null,"Inglese"]
[null,null,"Formato",null,"Materiale a stampa"]
[null,null,null,"Livello bibliografico","Monografia"]
[null,null,null,"Note generali","Papers from a workshop held in December 2013 in Uppsala."]
[null,null,null,"Nota di bibliografia","Includes bibliographical references and index."]
[null,null,"Nota di contenuto",null,"State, nation, and sovereignty amidst uncertainty and change: turning points and continuities in Latvian society and polity / David J. Smith -- Death and transfiguration: reflections on World War I and the birth of the Latvian state / Andrejs Plakans -- Latvians as a civic nation: the interwar experiment / Marina Germane -- Why remember Paul Schiemann? / David J. Smith -- The return of the gods?: authoritarian culture and neo-paganism in interwar Latvia, 1934-1940 / Deniss Hanovs and Valdis Tēraudkalns -- \"Come on Latvians, join the party--we'll forgive you everything\": ideological struggle during the national communist affair, summer 1959 / Geoffrey Swain -- \"At first we missed our Latvia ...\": attitudes towards Latvian state during the Soviet period / Irēna Saleniece -- Latvians in exile and the idea of the Latvian state / Ieva Zake -- International reactions to the independence of the Baltic states: the French example, 1989-1991 / Una Bergmane -- \"You are not the people\": revisiting citizenship and geopolitics / Li Bennich-Björkman -- Post-Soviet Latvia: a consolidated democracy in the third decade of independence? / Geoffrey Pridham -- The Europeanisation of Latvia's public policy: the case of foreign aid policy, 2004-2010 / Pēteris Timofejevs Henriksson -- Paradoxes of power: gender, work, and family in the new Europe / Daina S. Eglitis -- Reflections on the political economy of the Latvian state since 1991: the role of external "]
[{"$nulls":4},"goals: what to do now that externally defined goals have been realised? / Alfs Vanags -- The unbearable myth of convergence: episodes in the economic development of Latvia / Aldis Purs -- The roots of radicalism: persistent problems of class and ethnicity in Latvia's politics / Matthew Kott."]