Download or read book Contribution l tude du bruit dans les amplificateurs Raman written by Bruno Bristiel and published by . This book was released on 2006 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ce travail a pour but de modéliser et ensuite d'analyser plusieurs sources de bruit dans les amplificateurs Raman distribués. Le formalisme de l'émission spontanée n'est pas utilisé dans cette étude car il présente plusieurs inconsistences non satisfaisantes à notre sens. Aussi, le bruit dans les amplificateurs Raman a été apréhendé via un formalisme semi-classique qui nous permet de représenter conjointement le bruit d'atténuation, le bruit d'amplification et également le transfert de bruit de pompe spécifique au phénomène Raman. De manière plus conventionnelle, le bruit de double rétrodiffusion Rayleigh est également étudié.
Download or read book Bruit basse et moyenne fr quence des amplificateurs optiques distribu s effet Raman written by Cédric Chluda and published by . This book was released on 2006 with total page 211 pages. Available in PDF, EPUB and Kindle. Book excerpt: L'objectif de cette thèse est d'évaluer les contributions en bruit associées aux différents éléments constituant un amplificateur Raman. par A cet effet, nous étudions le bruit associé à la source de pompage dépolarisée, en mettant plus particulièrement l'accent sur l'excès de bruit dû aux deux lasers multimodes qui composent cet étage. Après avoir développé un modèle qualitatif prenant en compte le caractère non-linéaire du gain optique des pompes employées, la source dépolarisée est caractérisée au premier et au second ordre élément par élément puis dans son ensemble. Nous avons alors pu constater qu'outre la contribution du bruit propre aux lasers de pompe, les sources d'alimentation électrique ainsi que divers composants optiques passifs apportaient une contribution non négligeable au bruit total du système de pompage complet. par Parallèlement, nous avons développé un modèle de l'amplificateur Raman à base d'équations de propagation prenant en compte le caractère multimode du système de pompage afin d'évaluer l'impact de l'étalement spectral de la source laser sur la courbe de gain de l'amplificateur. Un ensemble de caractérisations statiques est alors confronté aux résultats de simulation, permettant ainsi de valider le modèle. par Celui-ci est ensuite complété afin d'obtenir la réponse du système en émission spontanée amplifiée, considérée comme le bruit de fond de l'amplificateur, et confronté aux résultats expérimentaux. par Enfin, l'étude des fluctuations vues par le photodétecteur en sortie d'amplificateur est réalisée. La mise en place d'un banc de mesure de bruit d'amplitude permet de valider, par les résultats en bruit obtenus, le développement d'un modèle numérique décrivant efficacement les différents excès de bruit dus à divers phénomènes de battement vus par le photodétecteur en fin de ligne. L'impact de la largeur de raie de la source signal sur le bruit photodétecté ainsi que le report de bruit de pompage sur le signal de sortie sont enfin observés
Download or read book Contribution l tude des m canismes de bruit et de leur contr le dans les amplificateurs optiques written by Virginie Dallot (Ingénieur).) and published by . This book was released on 2002 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Contribution L tude Des M canismes de Bruit Et de Leur Contr le Dans Les Amplificateurs Optiques written by Virginie Dallot and published by . This book was released on 2002 with total page 117 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Journal de physique th orique et appliqu e written by and published by . This book was released on 1923 with total page 2250 pages. Available in PDF, EPUB and Kindle. Book excerpt: Beginning in 1920, contains section on bibliography and since 1928 minutes and résumeés of the society's proceedings, as well as other supplementary material (often separately paged).
Download or read book The Anaesthesia Science Viva Book written by Simon Bricker and published by Cambridge University Press. This book was released on 2005 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt: The definitive guide to this part of the FRCA exam.
Download or read book Springer Handbook of Acoustics written by Thomas Rossing and published by Springer Science & Business Media. This book was released on 2007-06-21 with total page 1179 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is an unparalleled modern handbook reflecting the richly interdisciplinary nature of acoustics edited by an acknowledged master in the field. The handbook reviews the most important areas of the subject, with emphasis on current research. The authors of the various chapters are all experts in their fields. Each chapter is richly illustrated with figures and tables. The latest research and applications are incorporated throughout, including computer recognition and synthesis of speech, physiological acoustics, diagnostic imaging and therapeutic applications and acoustical oceanography. An accompanying CD-ROM contains audio and video files.
Download or read book Textbook of Oral Cancer written by Saman Warnakulasuriya and published by Springer Nature. This book was released on 2020-02-22 with total page 449 pages. Available in PDF, EPUB and Kindle. Book excerpt: This comprehensive multidisciplinary book examines all aspects of cancers of the mouth and oropharynx with the aim of equipping advanced students and practitioners in the early stages of specialist training with an up-to-date guide and reference. A multinational team of authors – all experts in the field of oral oncology – provide illuminating contributions on the full range of relevant topics: epidemiology, risk factors, clinical features, staging and prognostic factors, pathology, diagnostic techniques, disease prevention, surgery, radiotherapy, and chemotherapy. Molecular biology, molecular targeted therapies for advanced cases, and future diagnostic and prognostic applications of new technologies also receive careful attention. In providing a wealth of essential information and guidance in a practical format, the book will be a superb asset for senior graduate students in dentistry and specialist trainees in head and neck oncology. It will also be of high value for the many physicians, surgeons, pathologists, dentists, and specialists involved in the prevention, diagnosis, and management of squamous cell carcinomas of the oral cavity and oropharynx.
Download or read book The Mechanization of Natural Philosophy written by Sophie Roux and published by Springer Science & Business Media. This book was released on 2012-09-26 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Mechanisation of Natural Philosophy is devoted to various aspects of the transformation of natural philosophy during the 16th and 17th centuries that is usually described as mechanical philosophy . Drawing the border between the old Aristotelianism and the « new » mechanical philosophy faces historians with a delicate task, if not an impossible mission. There were many natural philosophers who actually crossed the border between the two worlds, and, inside each of these worlds, there was a vast spectrum of doctrines, arguments and intellectual practices. The expression mechanical philosophy is burdened with ambiguities. It may refer to at least three different enterprises: a description of nature in mathematical terms; the comparison of natural phenomena to existing or imaginary machines; the use in natural philosophy of mechanical analogies, i.e. analogies conceived in terms of matter and motion alone.However mechanical philosophy is defined, its ambition was greater than its real successes. There were few mathematisations of phenomena. The machines of mechanical philosophers were not only imaginary, but had little to do with the machines of mecanicians. In most of the natural sciences, analogies in terms of matter and motion alone failed to provide satisfactory accounts of phenomena.By the same authors: Mechanics and Natural Philosophy before the Scientific Revolution (Boston Studies in the Philosophy of Science 254).
Download or read book Decision Making in Medicine written by Stuart B. Mushlin and published by Elsevier Health Sciences. This book was released on 2009-10-27 with total page 754 pages. Available in PDF, EPUB and Kindle. Book excerpt: This popular reference facilitates diagnostic and therapeutic decision making for a wide range of common and often complex problems faced in outpatient and inpatient medicine. Comprehensive algorithmic decision trees guide you through more than 245 disorders organized by sign, symptom, problem, or laboratory abnormality. The brief text accompanying each algorithm explains the key steps of the decision making process, giving you the clear, clinical guidelines you need to successfully manage even your toughest cases. An algorithmic format makes it easy to apply the practical, decision-making approaches used by seasoned clinicians in daily practice. Comprehensive coverage of general and internal medicine helps you successfully diagnose and manage a full range of diseases and disorders related to women's health, emergency medicine, urology, behavioral medicine, pharmacology, and much more. A Table of Contents arranged by organ system helps you to quickly and easily zero in on the information you need. More than a dozen new topics focus on the key diseases and disorders encountered in daily practice. Fully updated decision trees guide you through the latest diagnostic and management guidelines.
Download or read book Canadian Journal of Physics written by and published by . This book was released on 1975 with total page 1056 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Diagnosis and Treatment of Male Infertility written by Nabil Aziz and published by Springer. This book was released on 2017-06-15 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt: This case-based guide is written from the clinician's perspective, dealing with a defined male infertility problem, tracing the actual clinical pathway arriving at the diagnosis, and discussing the treatment options and the likely outcome. Rather than focusing on excessive theoretical details, each chapter presents a unique clinical vignette or scenario, the relevant aspects of which are followed throughout the entire chapter, correlating specific fertility issues with clinical findings, describing treatment options, prognoses and procedures (when indicated), and concluding with practical clinical pearls. Opening with chapters describing current diagnoses of male infertility and semen analysis, the subsequent cases presented cover a variety of relevant topics in male infertility, including anabolic steroid use, ejaculatory and erectile dysfunction, azoospermia, Klinefelter Syndrome, varicocele, cystic fibrosis and spinal cord injury. Additional chapters discuss choosing the right assisted conception technique and developing and managing a sperm bank. Practical and illustrative of a wide array of male fertility issues, The Diagnosis and Treatment of Male Infertility is a go-to resource for clinical andrologists, reproductive endocrinologists, urologists, primary care physicians and any professional working to treat the infertile male.
Download or read book Fan Noise Reduction An Overview written by Edmane Envia and published by . This book was released on 2001 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Noise in Physical Systems written by D. Wolf and published by Springer Science & Business Media. This book was released on 2013-12-11 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt: Noise in physical systems - as a consequence of the corpuscular nature of matter - conveys information about microscopic mechanisms determining the macroscopic behavior of the system. Besides being a source of information, noise also represents a source of annoying disturbances which affect information transMission along a physical system. Therefore, noise analysis can promote our insight into the behavior of a physical system, as well as our knowledge of the natural constraints imposed upon physical-information transmission channels and devices. In recent years the continuous scientific and technical interest in noise problems has led to a remarkable progress in the understanding of noise phenomena. This progress is reflected by the rich material presented at the Fifth International Conference on Noise in Physical Systems. The conference papers originally published in these proceedings cover the various aspects of today's noise research in the fields of solid-state devices, l/f-noise, magnetic and superconducting materials, measuring methods, and theory of fluctuations. Each session of the conference was introduced by one or two invited review lectures which are included in these proceedings in full length. The 12 invited papers and more than 40 contributed papers on specific topics (only three of them have been omitted from the proceedings since they will be published elsewhere) provide a comprehensive survey of the current state-of-the-art and recent advances of noise analysis.
Download or read book IAP Colour Atlas of Pediatrics written by A Parthasarathy and published by JP Medical Ltd. This book was released on 2012-04 with total page 522 pages. Available in PDF, EPUB and Kindle. Book excerpt: Colour atlas pn paediatric illnesses and management covering both common and rare disorders.
Download or read book General Relativity and Gravitational Waves written by Joseph Weber and published by Courier Corporation. This book was released on 2004-01-01 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt: An internationally famous physicist and electrical engineer, the author of this text was a pioneer in the investigation of gravitational waves. Joseph Weber's General Relativity and Gravitational Waves offers a classic treatment of the subject. Appropriate for upper-level undergraduates and graduate students, this text remains ever relevant. Brief but thorough in its introduction to the foundations of general relativity, it also examines the elements of Riemannian geometry and tensor calculus applicable to this field. Approximately a quarter of the contents explores theoretical and experimental aspects of gravitational radiation. The final chapter focuses on selected topics related to general relativity, including the equations of motion, unified field theories, Friedman's solution of the cosmological problem, and the Hamiltonian formulation of general relativity. Exercises. Index.
Download or read book Physics in Biology and Medicine written by Paul Davidovits and published by Academic Press. This book was released on 2008 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt: This third edition covers topics in physics as they apply to the life sciences, specifically medicine, physiology, nursing and other applied health fields. It includes many figures, examples and illustrative problems and appendices which provide convenient access to the most important concepts of mechanics, electricity, and optics.
