00862nam0-22003131i-450-99000002709040332120050107114859.0000002709FED01000002709(Aleph)000002709FED0100000270920020821d1909----km-y0itay50------baitaITa---a---001yyElasticite et resistance des materiauxLouis WeveParisBeranger1909II, 512, 12 p.ill.19 cmMaterialiResistenzaResistenza dei materiali620.112Wève,Louis331535ITUNINARICAUNIMARCBK99000002709040332113 k 71 1033568FINBCFINBCElasticite et resistance des materiaux107241UNINA01271nam--2200361---450-99000225813020331620090901092601.0000225813USA01000225813(ALEPH)000225813USA0100022581320041210d1968----km-y0itay0103----baitaIT||||||||001yy<<L'>>imposta di ricchezza mobile : manuale pratico aggiornato con le piu recenti disposizioni legali e fiscali ; in appendice: Riforma fiscaleFrancesco MartinenghiMilanoPirola1968640 p.24 cm20012001001-------2001MARTINENGHI,Francesco24711ITsalbcISBD990002258130203316XXIV.5.B 121 (IG VII 90)535 G.XXIV.5.B 121 (IG VII)00239115BKGIUSIAV31020041210USA011526SIAV31020041210USA011535SIAV31020041210USA011542RSIAV59020090901USA010926Imposta di ricchezza mobile : manuale pratico aggiornato con le piu recenti disposizioni legali e fiscali ; in appendice: Riforma fiscale1066448UNISA05574nam 22007334a 450 991014331060332120210209165513.01-280-51054-497866105105421-84704-452-20-470-61209-60-470-39441-21-84704-552-9(CKB)1000000000335569(EBL)700720(OCoLC)769341515(SSID)ssj0000158261(PQKBManifestationID)11151244(PQKBTitleCode)TC0000158261(PQKBWorkID)10145104(PQKB)10820728(MiAaPQ)EBC700720(MiAaPQ)EBC261389(Au-PeEL)EBL261389(CaONFJC)MIL51054(OCoLC)475976991(EXLCZ)99100000000033556920051123d2006 uy 0engur|n|---|||||txtccrFree-space optics[electronic resource] propagation and communication /Olivier Bouchet ... [et al.]London ;Newport Beach, CA ISTE20061 online resource (221 p.)ISTE ;v.91First published in France in 2004 by Hermes Science/Lavoisier entitled "Optique sans fil: propagation et communication."1-905209-02-9 Includes bibliographical references (p. [209]-215) and index.Free-Space Optics; Table of Contents; Introduction; Chapter 1. History of Optical Telecommunications; 1.1. Some definitions; 1.1.1. Telecommunication; 1.1.2. Optical transmission; 1.1.3. Radio or Hertzian waves; 1.2. The prehistory of telecommunications; 1.3. The optical air telegraph; 1.4. The code; 1.5. The optical telegraph; 1.6. The heliograph or solar telegraph: a portable telecommunication system; 1.7. Alexander Graham Bell's photophone; Chapter 2. Basic Principles of Electromagnetism; 2.1. Introduction; 2.2. Maxwell's equations in an unspecified medium2.3. Propagation of electromagnetic waves in an isotropic and linear homogeneous medium2.4. Energy associated with a wave; 2.5. Propagation of a wave in a non-homogeneous medium; 2.6. Coherent and incoherent waves; 2.7. Relations between classical electromagnetism and geometrical optics; 2.8. The electromagnetic spectrum; 2.9. Units and scales; 2.10. Examples of sources in the visible light and near visible light; 2.11. Conclusion; Chapter 3. Emission and Reception of Optical Beams; 3.1. Foreword; 3.2. Introduction; 3.3. Radiometry: basic concepts3.4. Optical spectral windows, materials and eye-safety3.5. Transmitters; 3.5.1. Broad spectrum incoherent light emitting diodes; 3.5.1.1. Structures; 3.5.1.2. Near and far field patterns; 3.5.1.3. Spectral characteristics; 3.5.1.4. Electrical and optical characteristics; 3.5.2. Laser diodes: high radiant power output, coherent waves; 3.5.2.1. Structures; 3.5.2.2. "(Φtransmitted )/(Iinjected) characteristic": static and dynamic; 3.5.2.3. Spectra and near field patterns; 3.5.2.4. Spectral and modal instabilities and light intensity noise3.5.3. Use of amplifiers with "rare earth ion" doped fibers3.6. Photodetectors; 3.6.1. Optical spectral range and materials; 3.6.2. Principle of operation and structures; 3.6.2.1. Surface phenomena: optical reflection, charge mobility and current leakage; 3.6.2.2. Absorption and conduction: semiconductor junctions; 3.6.3. Responsivity, response time, junction capacity and dark current; 3.6.4. Photomultipliers and semiconductor avalanche photodiodes; Chapter 4. Line of Sight Propagation; 4.1. Influence of the propagation environment; 4.1.1. Atmospheric absorption; 4.1.2. Atmospheric scattering4.1.3. Extinction and total spectral transmission4.1.4. Earth's atmosphere; 4.1.4.1. Atmospheric composition; 4.1.4.2. Aerosols; 4.2. Visibility; 4.2.1. Generalities; 4.2.1.1. Definitions; 4.2.1.2. Units and scales; 4.2.1.3. Meteorology needs; 4.2.1.4. Measurement methods; 4.2.2. Visual estimate of the meteorological optical range; 4.2.2.1. General; 4.2.2.2. Estimate of the day time meteorological optical range; 4.2.2.3. Estimate of the night time meteorological optical range; 4.2.2.4. Estimate of the meteorological optical range in the absence of distant reference markers4.2.3. Meteorological optical range measurement instrumentsFree space optics is a telecommunications technique which is already being used for everyday exchange of information and has many advantages over other techniques (bandwidth, low cost, mobility of the equipment, security, etc.); within the next decade, it is likely to become an integral and essential part of data-processing architectures and telecommunications.A history of wireless optical telecommunications is given, together with a recapitulation of the application of the principles of electromagnetism to free-space optics. Coverage is also given to the transmitters and receivers of optiISTEFree space optical interconnectsOptical communicationsElectronic books.Free space optical interconnects.Optical communications.621.36621.382/7621.3827Bouchet Olivier953148MiAaPQMiAaPQMiAaPQBOOK9910143310603321Free-space optics2154806UNINA