CONTRIBUTION A L'ETUDE DE PROPRIETES STATIQUES ET DYNAMIQUES D'UN LASER KILOMETRIQUE PDF Download
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Author: MOURAD.. IKEZOUHENE
Publisher:
ISBN:
Category :
Languages : fr
Pages : 163
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Book Description
DEUX ASPECTS FONDAMENTAUX DES LASERS SONT ETUDIES DANS LE CAS DES LASERS KILOMETRIQUES A FIBRE DOPEE AU NEODYME. NOUS PROPOSONS LA METHODE DE PROPAGATION DES FAISCEAUX POUR RESOUDRE NUMERIQUEMENT L'EQUATION DE PROPAGATION SCALAIRE. CETTE METHODE A SERVI DE TEST POUR REPRODUIRE LES RESULTATS DE LA THEORIE DU FAISCEAU GAUSSIEN. NOUS EN VERIFIONS LA FAISABILITE D'UTILISATION DE CETTE METHODE POUR RENDRE COMPTE DU GUIDAGE DU MODE FONDAMENTAL D'UNE FIBRE MONOMODE DOPEE AU NEODYME EN CONFIGURATION DE PROPAGATION LIBRE OU ENTRE DEUX MIROIRS. NOUS MONTRONS L'INFLUENCE DES EFFETS DE PROPAGATION, DE LA SUSCEPTIBILITE DE SATURATION DU MILIEU AMPLIFICATEUR ET DES PARAMETRES GEOMETRIQUES DE LA CAVITE SUR LES PARAMETRES GEOMETRIQUES DU MODE FONDAMENTAL. NOUS ETUDIONS LA REPONSE DYNAMIQUE DES LASERS KILOMETRIQUES A FIBRE DOPEE NEODYME A UNE MODULATION DE LA PUISSANCE DE POMPE. L'ECHELLE DES TEMPS CARACTERISTIQUES MIS EN JEU EST COMPARABLE A CELLE DU NIVEAU SUPERIEUR DE LA TRANSITION LASER. LES OSCILLATIONS DE RELAXATION EN REGIME TRANSITOIRE Y SONT FORTEMENT AMORTIES. NOUS CONSTATONS LA DISPARITION DES EFFETS DE COMPETITION ENTRE LES DEUX ETATS PROPRES DE POLARISATION. UN MODELE THEORIQUE SIMPLE PERMET DE RENDRE COMPTE DES DIFFERENTS COMPORTEMENTS DYNAMIQUES OBSERVES EXPERIMENTALEMENT
Author: MOURAD.. IKEZOUHENE
Publisher:
ISBN:
Category :
Languages : fr
Pages : 163
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Book Description
DEUX ASPECTS FONDAMENTAUX DES LASERS SONT ETUDIES DANS LE CAS DES LASERS KILOMETRIQUES A FIBRE DOPEE AU NEODYME. NOUS PROPOSONS LA METHODE DE PROPAGATION DES FAISCEAUX POUR RESOUDRE NUMERIQUEMENT L'EQUATION DE PROPAGATION SCALAIRE. CETTE METHODE A SERVI DE TEST POUR REPRODUIRE LES RESULTATS DE LA THEORIE DU FAISCEAU GAUSSIEN. NOUS EN VERIFIONS LA FAISABILITE D'UTILISATION DE CETTE METHODE POUR RENDRE COMPTE DU GUIDAGE DU MODE FONDAMENTAL D'UNE FIBRE MONOMODE DOPEE AU NEODYME EN CONFIGURATION DE PROPAGATION LIBRE OU ENTRE DEUX MIROIRS. NOUS MONTRONS L'INFLUENCE DES EFFETS DE PROPAGATION, DE LA SUSCEPTIBILITE DE SATURATION DU MILIEU AMPLIFICATEUR ET DES PARAMETRES GEOMETRIQUES DE LA CAVITE SUR LES PARAMETRES GEOMETRIQUES DU MODE FONDAMENTAL. NOUS ETUDIONS LA REPONSE DYNAMIQUE DES LASERS KILOMETRIQUES A FIBRE DOPEE NEODYME A UNE MODULATION DE LA PUISSANCE DE POMPE. L'ECHELLE DES TEMPS CARACTERISTIQUES MIS EN JEU EST COMPARABLE A CELLE DU NIVEAU SUPERIEUR DE LA TRANSITION LASER. LES OSCILLATIONS DE RELAXATION EN REGIME TRANSITOIRE Y SONT FORTEMENT AMORTIES. NOUS CONSTATONS LA DISPARITION DES EFFETS DE COMPETITION ENTRE LES DEUX ETATS PROPRES DE POLARISATION. UN MODELE THEORIQUE SIMPLE PERMET DE RENDRE COMPTE DES DIFFERENTS COMPORTEMENTS DYNAMIQUES OBSERVES EXPERIMENTALEMENT
Author: Augustin Olivier
Publisher:
ISBN:
Category :
Languages : fr
Pages : 0
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Book Description
Author: Leslie Rainer
Publisher: Getty Publications
ISBN: 1606060430
Category : Architecture
Languages : fr
Pages : 438
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Book Description
Earthen architecture constitutes one of the most diverse forms of cultural heritage and one of the most challenging to preserve. It dates from all periods and is found on all continents but is particularly prevalent in Africa, where it has been a building tradition for centuries. Sites range from ancestral cities in Mali to the palaces of Abomey in Benin, from monuments and mosques in Iran and Buddhist temples on the Silk Road to Spanish missions in California. This volume's sixty-four papers address such themes as earthen architecture in Mali, the conservation of living sites, local knowledge systems and intangible aspects, seismic and other natural forces, the conservation and management of archaeological sites, research advances, and training.
Author: David Cowley
Publisher: Oxbow Books Limited
ISBN: 9781842175163
Category : Archaeological surveying
Languages : en
Pages : 0
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Book Description
Airborne Laser Scanning (ALS), or lidar, is an enormously important innovation for data collection and interpretation in archaeology. The application of archaeological 3D data deriving from sources including ALS, close-range photogrammetry and terrestrial and photogrammetric scanners has grown exponentially over the last decade. Such data present numerous possibilities and challenges, from ensuring that applications remain archaeologically relevant, to developing practices that integrate the manipulation and interrogation of complex digital datasets with the skills of archaeological observation and interpretation. This volume addresses the implications of multi-scaled topographic data for contemporary archaeological practice in a rapidly developing field, drawing on examples of ongoing projects and reflections on best practice. Twenty papers from across Europe explore the implications of these digital 3D datasets for the recording and interpretation of archaeological topography, whether at the landscape, site or artifact scale. The papers illustrate the variety of ways in which we engage with archaeological topography through 3D data, from discussions of its role in landscape archaeology, to issues of context and integration, and to the methodological challenges of processing, visualization and manipulation. Critical reflection on developing practice and implications for cultural resource management and research contextualize the case studies and applications, illustrating the diverse and evolving roles played by multi-scalar topographic data in contemporary archaeology.
Author: Claude Cohen-Tannoudji
Publisher: John Wiley & Sons
ISBN: 3527345558
Category : Science
Languages : en
Pages : 790
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Book Description
This new, third volume of Cohen-Tannoudji's groundbreaking textbook covers advanced topics of quantum mechanics such as uncorrelated and correlated identical particles, the quantum theory of the electromagnetic field, absorption, emission and scattering of photons by atoms, and quantum entanglement. Written in a didactically unrivalled manner, the textbook explains the fundamental concepts in seven chapters which are elaborated in accompanying complements that provide more detailed discussions, examples and applications. * Completing the success story: the third and final volume of the quantum mechanics textbook written by 1997 Nobel laureate Claude Cohen-Tannoudji and his colleagues Bernard Diu and Franck Laloë * As easily comprehensible as possible: all steps of the physical background and its mathematical representation are spelled out explicitly * Comprehensive: in addition to the fundamentals themselves, the books comes with a wealth of elaborately explained examples and applications Claude Cohen-Tannoudji was a researcher at the Kastler-Brossel laboratory of the Ecole Normale Supérieure in Paris where he also studied and received his PhD in 1962. In 1973 he became Professor of atomic and molecular physics at the Collège des France. His main research interests were optical pumping, quantum optics and atom-photon interactions. In 1997, Claude Cohen-Tannoudji, together with Steven Chu and William D. Phillips, was awarded the Nobel Prize in Physics for his research on laser cooling and trapping of neutral atoms. Bernard Diu was Professor at the Denis Diderot University (Paris VII). He was engaged in research at the Laboratory of Theoretical Physics and High Energy where his focus was on strong interactions physics and statistical mechanics. Franck Laloë was a researcher at the Kastler-Brossel laboratory of the Ecole Normale Supérieure in Paris. His first assignment was with the University of Paris VI before he was appointed to the CNRS, the French National Research Center. His research was focused on optical pumping, statistical mechanics of quantum gases, musical acoustics and the foundations of quantum mechanics.
Author: Serge Morand
Publisher: Springer Science & Business Media
ISBN: 9400721145
Category : Medical
Languages : en
Pages : 335
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Book Description
Molecular epidemiology has recently broaden its focuses due to the development of molecular tools but also by incorporating advances of other fields such as mathematical epidemiology, molecular ecology, population genetics and evolution. Facing new risks of emerging and re-emerging infectious diseases that are threats for humans and their livestock, the objectives of molecular epidemiology include: - the development of molecular tools, genotyping and gene expression - the incorporation of concepts and results of population genetics of infectious diseases - the integration of recent advances in theoretical epidemiology and evolutionary ecology of diseases - a better understanding of transmission for the development of risk factors analyses. This book will demonstrate how the latest developments in molecular tools and in epidemiology can be integrated with studies of host-pathogen interactions. Besides a strong theoretical component, there will also be an emphasis on applications in the fields of epidemiology, public health, veterinary medicine, and health ecology. Students and researchers in the fields of epidemiology, animal and human health, evolutionary ecology, parasitology are the main potential readers of the book, as well as a broader audience from veterinary medicine and conservation.
Author: G. Mathias Kondolf
Publisher: John Wiley & Sons
ISBN: 1118648560
Category : Science
Languages : en
Pages : 560
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Book Description
Fluvial Geomorphology studies the biophysical processes acting in rivers, and the sediment patterns and landforms resulting from them. It is a discipline of synthesis, with roots in geology, geography, and river engineering, and with strong interactions with allied fields such as ecology, engineering and landscape architecture. This book comprehensively reviews tools used in fluvial geomorphology, at a level suitable to guide the selection of research methods for a given question. Presenting an integrated approach to the interdisciplinary nature of the subject, it provides guidance for researchers and professionals on the tools available to answer questions on river restoration and management. Thoroughly updated since the first edition in 2003 by experts in their subfields, the book presents state-of-the-art tools that have revolutionized fluvial geomorphology in recent decades, such as physical and numerical modelling, remote sensing and GIS, new field techniques, advances in dating, tracking and sourcing, statistical approaches as well as more traditional methods such as the systems framework, stratigraphic analysis, form and flow characterisation and historical analysis. This book: Covers five main types of geomorphological questions and their associated tools: historical framework; spatial framework; chemical, physical and biological methods; analysis of processes and forms; and future understanding framework. Provides guidance on advantages and limitations of different tools for different applications, data sources, equipment and supplies needed, and case studies illustrating their application in an integrated perspective. It is an essential resource for researchers and professional geomorphologists, hydrologists, geologists, engineers, planners, and ecologists concerned with river management, conservation and restoration. It is a useful supplementary textbook for upper level undergraduate and graduate courses in Geography, Geology, Environmental Science, Civil and Environmental Engineering, and interdisciplinary courses in river management and restoration.
Author: David S. G. Thomas
Publisher: John Wiley & Sons
ISBN: 1118687434
Category : Science
Languages : en
Pages : 918
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Book Description
The third edition of this comprehensive encyclopedic dictionary covers the whole field of physical geography and provides an essential reference for all students and lecturers in this field.
Author: Siegfried Siegesmund
Publisher: Springer
ISBN: 3319689207
Category : Science
Languages : en
Pages : 700
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Book Description
This book focuses on the geological evolution of Southwest (SW) Gondwana and presents state-of-the-art insights into its evolution. It addresses the diachronic assembly of continental fragments derived from the break-up of the Rodinia supercontinent later amalgamated to build SW Gondwana during the Neoproterozoic–Cambrian transition, which on a global scale includes parts of present-day South America, Africa and Madagascar. The book presents 24 state-of-the-art reviews including the most crucial controversies. Most experienced scientists about the geology of SW Gondwana from Europe, Africa, South America and Australia present contributions on key areas addressing the interactions between the main cratons and fold belts on both sides of the South Atlantic Ocean. Chapters related to the geology of the major Archean- Paleoproterozoic cratons and Neoproterozoic Brasiliano/Pan-African fold belts enable readers to gain an in-depth understanding of the tectonometamorphic and magmatic evolution of SW Gondwana. The book covers a wide range of issues including metallogenetic, sedimentary, paleobiological and paleoclimatic processes and allows a deep insight into this key period of the Earth’s evolution.
Author: Darius Bartlett
Publisher: CRC Press
ISBN: 142002342X
Category : Technology & Engineering
Languages : en
Pages : 350
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Book Description
Increasingly used to analyze and manage marine and coastal zones, Geographical Information Systems (GIS) provide a powerful set of tools for integrating and processing spatial information. These technologies are increasingly used in the management and analysis of the coastal zone. Supplying the guidance necessary to use these tools, GIS for Coastal
