Transfert d'énergie sans fil aux Implants Médicaux Électroniques (IME) PDF Download
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Author: Aref Trigui
Publisher: Editions Universitaires Europeennes
ISBN: 9783841738684
Category :
Languages : fr
Pages : 168
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Book Description
En raison de l'evolution continue de leurs potentiels, les IME, souvent alimentees par des batteries, necessitent ainsi plus d'energie pour fonctionner. Etant donne la quantite d'energie limitee des batteries, le recours a une technique de rechargement sans fil est tres recommande. Plusieurs techniques, proposees dans la litterature, sont discutees dans ce manuscrit avec une attention particulaire au transfert d'energie par lien inductif. Bien que cette methode est la plus adequate pour les IME, nous comptons encore un certain nombre de defis. Un defi majeur est la sensibilite de l'efficacite du transfert d'energie a la variation de certains parametres du lien comme le facteur de couplage entre les bobines, la charge secondaire et l'inductance des bobines. Une variation de l'un de ces parametres est en mesure d'alterer la frequence de resonance primaire et reduire en consequence la quantite d'energie transferee vers l'IME. Dans ce contexte, nous presentons une nouvelle technique pour compenser la variation des parametres du lien inductif. Elle permet de maintenir l'etat de resonance dans le transmetteur et d'assurer une meilleure transmission d'energie en depit de ces variations.
Author: Aref Trigui
Publisher: Editions Universitaires Europeennes
ISBN: 9783841738684
Category :
Languages : fr
Pages : 168
Get Book Here
Book Description
En raison de l'evolution continue de leurs potentiels, les IME, souvent alimentees par des batteries, necessitent ainsi plus d'energie pour fonctionner. Etant donne la quantite d'energie limitee des batteries, le recours a une technique de rechargement sans fil est tres recommande. Plusieurs techniques, proposees dans la litterature, sont discutees dans ce manuscrit avec une attention particulaire au transfert d'energie par lien inductif. Bien que cette methode est la plus adequate pour les IME, nous comptons encore un certain nombre de defis. Un defi majeur est la sensibilite de l'efficacite du transfert d'energie a la variation de certains parametres du lien comme le facteur de couplage entre les bobines, la charge secondaire et l'inductance des bobines. Une variation de l'un de ces parametres est en mesure d'alterer la frequence de resonance primaire et reduire en consequence la quantite d'energie transferee vers l'IME. Dans ce contexte, nous presentons une nouvelle technique pour compenser la variation des parametres du lien inductif. Elle permet de maintenir l'etat de resonance dans le transmetteur et d'assurer une meilleure transmission d'energie en depit de ces variations.
Author: Hicham Jouaicha
Publisher:
ISBN:
Category :
Languages : fr
Pages : 78
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Book Description
Au cours des dernières années, le progrès des dispositifs électroniques implantables alimentés par des technologies sans fil a évolué continuellement et le besoin d'une alimentation sans fil et durable devient nécessaire pour le développement de ces appareils. La transmission d'énergie sans fil est l'une des technologies clés ayant été utilisée dernièrement pour alimenter les implants biomédicaux. Elle a été en effet l'objet des recherches scientifiques pour le traitement des maladies chroniques. La recherche en neuroscience est l'une des applications où le transfert d'énergie sans fil a amélioré la performance des implants neuronaux et a participé à la réduction de la taille, la complexité et à la consommation d'énergie de ces dispositifs. Ces implants ne peuvent pas utiliser de grosses batteries en raison de l'espace limité et pour éviter le risque associé à la chirurgie invasive pouvant également changer les résultats des expériences. Cette thèse présente le développement d'un système de transmission d'énergie sans fil par couplage inductif pour l'alimentation d'une interface d'enregistrement neuronal. Le système réalisé évite d'utiliser des grosses batteries ou câbles pour fournir l'énergie à ces interfaces et augmente la durée de vie des batteries implantables afin d'effectuer des opérations électrophysiologiques sur les animaux vivants à long terme. Cette base aidera les médecins et neuroscientifiques à suivre le comportement de ces animaux en mouvement libre et pendant une longue période de temps et en tout sécurité. La plateforme sans fil développée utilise une cage énergétique afin d'effectuer ces opérations et dans le but de distribuer la puissance dans plusieurs positions en fonction des déplacements et les mouvements effectués par des animaux des tests à l'intérieur de la cage. Le travail réalisé dans ce mémoire fournit de nouvelles stratégies pour la conception optimale des systèmes d'alimentations sans fil avec des améliorations et de forts résultats expérimentaux. Il comprend en outre le développement de quatre systèmes. Tout d'abord, l'architecture de chaque système sera présentée d'une manière ingénieuse. Par la suite, les performances du système pour des tests expérimentaux seront expliqués. Les résultats de ces tests seront bien sûr interprétés tout en comparant avec des systèmes existants. Une validation de ces résultats sera finalement effectuée avec des animaux vivants pour tester la fonctionnalité de la plateforme dans un cadre réel.
Author: Josef F. Bille
Publisher: Springer
ISBN: 3030166384
Category : Medical
Languages : en
Pages : 407
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Book Description
This open access book provides a comprehensive overview of the application of the newest laser and microscope/ophthalmoscope technology in the field of high resolution imaging in microscopy and ophthalmology. Starting by describing High-Resolution 3D Light Microscopy with STED and RESOLFT, the book goes on to cover retinal and anterior segment imaging and image-guided treatment and also discusses the development of adaptive optics in vision science and ophthalmology. Using an interdisciplinary approach, the reader will learn about the latest developments and most up to date technology in the field and how these translate to a medical setting. High Resolution Imaging in Microscopy and Ophthalmology – New Frontiers in Biomedical Optics has been written by leading experts in the field and offers insights on engineering, biology, and medicine, thus being a valuable addition for scientists, engineers, and clinicians with technical and medical interest who would like to understand the equipment, the applications and the medical/biological background. Lastly, this book is dedicated to the memory of Dr. Gerhard Zinser, co-founder of Heidelberg Engineering GmbH, a scientist, a husband, a brother, a colleague, and a friend.
Author: Paul K. Chu
Publisher: CRC Press
ISBN: 0849379741
Category : Medical
Languages : en
Pages : 720
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Book Description
This volume focuses on a variety of production and processing aspects of the latest biomaterials. It discusses how scaffolds are used in tissue engineering and describes common implant materials, such as hard tissue, blood contacting, and soft tissue. The book also examines the important role nanotechnology plays in the preparation of drugs, protein delivery, tissue engineering, cardiovascular biomaterials, hard tissue replacements, biosensors, and bio-MEMS. With contributions from renowned international experts and extensive reference lists in each chapter, this book provides detailed, practical information to produce biomaterials and employ them in biomedicine.
Author: Rolf Heister
Publisher: Springer Science & Business Media
ISBN: 3642742440
Category : Medical
Languages : en
Pages : 451
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Book Description
Not everyone is a friend of the manifold abbreviations that have by now beCome a part of the scientific language of medicine. In order to avoid misunderstanding these abbreviations, it is wise to refer to a reliable dic tionary, such as this one prepared by Heister. The abbreviation ED means, for instance, effective dose to the pharmacologist. However, it might also stand for emetic dose. Radiologists use the same abbreviation for erythema dose, and ED could also mean ethyl dichlorarsine. A com mon meaning of ECU is European currency unit, a meaning that might not be very often in scientific medical publications. ECU, however, also means environmental control unit or European Chiropractic Union. Hopefully, those making inventions and discoveries will make use of Heister's dictionary before creating new abbreviations when preparing manuscripts for scientific publications. It is a very worthwhile goal not to use the same abbreviation for several different terms, especially if it is already widely accepted to mean only one of them. It may be impossible, however, to achieve this goal in different scientific disciplines. Therefore, although it is wise for the abbreviations used in a publication to be defined, it is also very helpful for readers and writers to use a dictionary such as this one. The author deserves our warmest thanks since we know that compiling such a comprehensive dictionary is based upon incredibly hard effort.
Author: Bowen Li
Publisher: Springer
ISBN: 3030057496
Category : Technology & Engineering
Languages : en
Pages : 782
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Book Description
This collection gives broad and up-to-date results in the research and development of materials characterization and processing. Topics covered include characterization methods, ferrous materials, non-ferrous materials, minerals, ceramics, polymer and composites, powders, extraction, microstructure, mechanical behavior, processing, corrosion, welding, solidification, magnetic, electronic, environmental, nano-materials, and advanced materials The book explores scientific processes to characterize materials using modern technologies, and focuses on the interrelationships and interdependence among processing, structure, properties, and performance of materials.
Author: Charles Gebelein
Publisher: Springer Science & Business Media
ISBN: 1475795106
Category : Science
Languages : en
Pages : 477
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Book Description
The development and use of medical and dental materials are highly interdisciplinary endeavors which require expertise in chemistry, materials science, medicine and/or dentistry, mechanics and design engineering. The Symposium upon which this treatise is based was organized to bring members from these communities together to explore problems of mutual interest. The biomaterials which are used in medical or dental prostheses must not only exhibit structural stability and provide the desired function, but they must also perform over extended periods of time in the environment of the body. The latter is a very stringent requirement. The oral and other physiological environments are designed by nature to break down many organic substances. Also of importance is the requirement that materials used in the prosthesis not have a deleterious effect on body tissues. Most foreign (to the body) substances are somewhat toxic to human tissues; in fact, few factors are more limiting in the medical prosthesis field than the biocompatibility problem. Some of these problems and the attempts to solve them are discussed in this volume.
Author: Avital Ronell
Publisher: U of Nebraska Press
ISBN: 9780803289383
Category : Psychology
Languages : en
Pages : 492
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Book Description
The telephone marks the place of an absence. Affiliated with discontinuity, alarm, and silence, it raises fundamental questions about the constitution of self and other, the stability of location, systems of transfer, and the destination of speech. Profoundly changing our concept of long-distance, it is constantly transmitting effects of real and evocative power. To the extent that it always relates us to the absent other, the telephone, and the massive switchboard attending it, plugs into a hermeneutics of mourning. The Telephone Book, itself organized by a "telephonic logic," fields calls from philosophy, history, literature, and psychoanalysis. It installs a switchboard that hooks up diverse types of knowledge while rerouting and jamming the codes of the disciplines in daring ways. Avital Ronell has done nothing less than consider the impact of the telephone on modern thought. Her highly original, multifaceted inquiry into the nature of communication in a technological age will excite everyone who listens in. The book begins by calling close attention to the importance of the telephone in Nazi organization and propaganda, with special regard to the philosophy of Martin Heidegger. In the Third Reich the telephone became a weapon, a means of state surveillance, "an open accomplice to lies." Heidegger, in Being and Time and elsewhere, elaborates on the significance of "the call." In a tour de force response, Ronell mobilizes the history and terminology of the telephone to explicate his difficult philosophy. Ronell also speaks of the appearance of the telephone in the literary works of Duras, Joyce, Kafka, Rilke, and Strindberg. She examines its role in psychoanalysis—Freud said that the unconscious is structured like a telephone, and Jung and R. D. Laing saw it as a powerful new body part. She traces its historical development from Bell's famous first call: "Watson, come here!" Thomas A. Watson, his assistant, who used to communicate with spirits, was eager to get the telephone to talk, and thus to link technology with phantoms and phantasms. In many ways a meditation on the technologically constituted state, The Telephone Book opens a new field, becoming the first political deconstruction of technology, state terrorism, and schizophrenia. And it offers a fresh reading of the American and European addiction to technology in which the telephone emerges as the crucial figure of this age.
Author: Robert Becker
Publisher: Harper Collins
ISBN: 0688069711
Category : Science
Languages : en
Pages : 370
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Book Description
The Body Electric tells the fascinating story of our bioelectric selves. Robert O. Becker, a pioneer in the filed of regeneration and its relationship to electrical currents in living things, challenges the established mechanistic understanding of the body. He found clues to the healing process in the long-discarded theory that electricity is vital to life. But as exciting as Becker's discoveries are, pointing to the day when human limbs, spinal cords, and organs may be regenerated after they have been damaged, equally fascinating is the story of Becker's struggle to do such original work. The Body Electric explores new pathways in our understanding of evolution, acupuncture, psychic phenomena, and healing.
Author: Ankit Saneja
Publisher: Springer Nature
ISBN: 3030418421
Category : Medical
Languages : en
Pages : 278
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Book Description
This book covers nanotechnology based approaches for improving the therapeutic efficacy of natural products. It critically explores lipid nanoarchitectonics, inorganic particles and nanoemulsion based tools for delivering them. With its chapters from eminent experts working in this discipline, it is ideal for researchers and professionals working in the area.
