Gestion de l'énergie dans les systèmes et microsystèmes autonomes et vivants
Author: Société française de physique
Publisher:
Published: 2002
Total Pages: 81
ISBN-13: 9780868836072
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Architectures intégrées de gestion de l'énergie pour les microsystèmes autonomes
Author: Guy Waltisperger
Publisher:
Published: 2011
Total Pages: 0
ISBN-13:
DOWNLOAD EBOOKAugmenter la durée de vie d'une pile, voire s'en passer est aujourd'hui devenu une obligation pour les microsystèmes. En effet, à cette échelle, le remplacement des piles et leur rejet dans l'environnement sont problématiques. La voie préconisée pour répondre à cet enjeu est d'utiliser des sources d'énergie renouvelables (solaire, thermique et mécanique). Pour cela, nous proposons de développer une plateforme de récupération d'énergie multi-sources/multi-charges (MANAGY) capable de s'adapter à son environnement pour en extraire le maximum d'énergie et répondre à des applications diverses. L'architecture est constituée de chemins directs et de chemins indirects où l'énergie provenant des sources est d'abord transférée dans une unité de stockage avant d'être réutilisée par les charges du microsystème. L'utilisation de cette nouvelle architecture permet d'optimiser le transfert d'énergie entre sources et charges et améliore le rendement du système de 33%. Avant de développer une architecture multi-sources, nous avons cherché à améliorer le rendement de la source photovoltaïque (PV) qui, au vu de l'état de l'art, a la densité de puissance la plus élevée. La recherche du rendement maximum de la source PV revient à la recherche du point de puissance maximum (MPPT). Il existe pour chaque condition d'irradiance, de température, et d'énergie extraites un couple tension-courant permettant à la source de fournir un maximum de puissance (MPP). Grâce à l'utilisation de deux chemins de puissance, nous arrivons simultanément à créer une boucle de régulation faible puissance agissant sur le rapport cyclique du système de gestion d'énergie (MPPT) et une boucle de régulation de la tension de sortie agissant sur le transfert de l'énergie. La modélisation du système nous a permis de spécifier ses performances. Pour atteindre les performances requises, des architectures innovantes ont été réalisées qui ont fait l'objet de trois brevets. De plus, des blocs ne sont activés qu'aux instants de changement d'état du système et sont conçus, quand cela a été possible, avec des transistors fonctionnant en mode faible inversion. Toutes ces optimisations permettent au système de fonctionner sur une large plage de variation de l'éclairement (de conditions intérieures supérieures à 500 lux à extérieures) avec un rendement proche de 90%.
Simulacra and Simulation
Author: Jean Baudrillard
Publisher: University of Michigan Press
Published: 1994
Total Pages: 174
ISBN-13: 9780472065219
DOWNLOAD EBOOKDevelops a theory of contemporary culture that relies on displacing economic notions of cultural production with notions of cultural expenditure. This book represents an effort to rethink cultural theory from the perspective of a concept of cultural materialism, one that radically redefines postmodern formulations of the body.
The Disappearing Computer
Author: Norbert Streitz
Publisher: Springer
Published: 2007-07-20
Total Pages: 314
ISBN-13: 3540727272
DOWNLOAD EBOOKThis book examines how the computer, as we currently know it, will be replaced by a new generation of technologies, moving computing off the desktop and ultimately integrating it with real world objects and everyday environments. It provides a unique combination of concepts, methods and prototypes of ubiquitous and pervasive computing reflecting the current interest in smart environments and ambient intelligence.
Connected Objects in Health
Author: Laure Beyala
Publisher: Elsevier
Published: 2017-08-10
Total Pages: 186
ISBN-13: 0081023723
DOWNLOAD EBOOKConnected objects today present a range of opportunities in medicine. We live in a new digital era where the monitoring and analysis of one's own health information no longer belongs solely to the realm of science fiction. The success of these new devices resides in their usage, which integrates seamlessly into the daily life of the user in order to continually collect the maximum amount of data. These medical connected devices therefore constitute a new hope in transforming user experience as well as the care pathway. They offer a better level of support and a better quality of life for those suffering from chronic illnesses or mental, sensorial or physical disabilities. However, these solutions also pose systematic problems, especially regarding the risks linked to their usage. This book presents a cartography which clearly details all the potential risk scenarios linked to the usage of connected devices as well as the actions which should be undertaken to promote balanced governance and guarantee the development of high-quality medical devices. - Aims to help the reader understand the difference between a connected object and a medical connected device - Identifies and evaluates all the potential risks and perspectives associated with the use of connected medical devices - Shows how to make a comprehensive risk analysis with standards like ISO 31000 and 14971
Knowledge Cities
Author: Francisco Carrillo
Publisher: Routledge
Published: 2006-08-14
Total Pages: 308
ISBN-13: 1136390235
DOWNLOAD EBOOKKnowledge Cities are cities that possess an economy driven by high value-added exports created through research, technology, and brainpower. In other words, these are cities in which both the private and the public sectors value knowledge, nurture knowledge, spend money on supporting knowledge dissemination and discovery (ie learning and innovation) and harness knowledge to create products and services that add value and create wealth. Currently there are 65 urban development programs worldwide formally designated as “knowledge cities.” Knowledge-based cities fall under a new area of academic research entitled Knowledge-Based Development, which brings together research in urban development and urban studies and planning with knowledge management and intellectual capital. In this book, Francisco Javier Carillo of the Monterrey Institute of Technology (ITESM) brings together a group of distinguished scholars to outline the theory, development, and realities of knowledge cities. Based on knowledge-based development, the book shows how knowledge can be and is placed at the center of city planning and economic development to enable knowledge flows and innovation to provide a sustainable environment for high value-added products and services.
Celebrating the Third Place
Author: Ray Oldenburg
Publisher: Da Capo Press
Published: 2009-03-04
Total Pages: 238
ISBN-13: 0786731109
DOWNLOAD EBOOKNationwide, more and more entrepreneurs are committing themselves to creating and running "third places," also known as "great good places." In his landmark work, The Great Good Place, Ray Oldenburg identified, portrayed, and promoted those third places. Now, more than ten years after the original publication of that book, the time has come to celebrate the many third places that dot the American landscape and foster civic life. With 20 black-and-white photographs, Celebrating the Third Place brings together fifteen firsthand accounts by proprietors of third places, as well as appreciations by fans who have made spending time at these hangouts a regular part of their lives. Among the establishments profiled are a shopping center in Seattle, a three-hundred-year-old tavern in Washington, D.C., a garden shop in Amherst, Massachusetts, a coffeehouse in Raleigh, North Carolina, a bookstore in Traverse City, Michigan, and a restaurant in San Francisco.
Urban Travel and Sustainable Development
Author:
Publisher:
Published: 1995
Total Pages: 250
ISBN-13:
DOWNLOAD EBOOKGeography of Innovation
Author: Nadine Massard
Publisher: Routledge
Published: 2018-12-07
Total Pages: 116
ISBN-13: 1315457687
DOWNLOAD EBOOKWithin the European context of innovation for growth, public and corporate actors are faced with pressing questions concerning innovation policy and the return on public and private investment in innovation at the regional level. To help them answer these questions, researchers in the field of Geography of Innovation propose interesting developments and new perspectives for the analysis of localized innovation processes, interactions between science, technology and industry, and their impact on regional growth and competitiveness, offering new foundations for designing and evaluating public policies. The aim of this book is firstly to highlight major recent methodological advances in the Geography of Innovation, particularly concerning the measurement of spatial knowledge externalities and their impact on agglomeration effects. Strategic approaches using microeconomic data have also contributed to showing how firms’ strategies may interact with the local environment and impact upon agglomeration dynamics. Interesting new results emerge from the application of these new methodologies to the analysis of innovation dynamics in European regions and this book shows how they can help revisit some of the main tenets of received wisdom concerning the rationale and impact of public policies on the Geography of Innovation. This book was previously published as a special issue of Regional Studies.
Coding Freedom
Author: E. Gabriella Coleman
Publisher: Princeton University Press
Published: 2013
Total Pages: 268
ISBN-13: 0691144613
DOWNLOAD EBOOKWho are computer hackers? What is free software? And what does the emergence of a community dedicated to the production of free and open source software--and to hacking as a technical, aesthetic, and moral project--reveal about the values of contemporary liberalism? Exploring the rise and political significance of the free and open source software (F/OSS) movement in the United States and Europe, Coding Freedom details the ethics behind hackers' devotion to F/OSS, the social codes that guide its production, and the political struggles through which hackers question the scope and direction of copyright and patent law. In telling the story of the F/OSS movement, the book unfolds a broader narrative involving computing, the politics of access, and intellectual property. E. Gabriella Coleman tracks the ways in which hackers collaborate and examines passionate manifestos, hacker humor, free software project governance, and festive hacker conferences. Looking at the ways that hackers sustain their productive freedom, Coleman shows that these activists, driven by a commitment to their work, reformulate key ideals including free speech, transparency, and meritocracy, and refuse restrictive intellectual protections. Coleman demonstrates how hacking, so often marginalized or misunderstood, sheds light on the continuing relevance of liberalism in online collaboration.
