Download or read book Contribution l algorithmique distribu e dans les r seaux mobiles ad hoc written by Arnaud Casteigts and published by . This book was released on 2007 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt: Les réseaux mibiles ad hoc sont par nature instables et imprévisibles. De ces caractéristiques découle la difficulté à concevoir et analyser des algorithmes distribués garantissant certaines propriétés. C'est sur ce point que porte la contribution majeure de cette thèse. Pour amorcer cette étude, nous avons étudié quelques problèmes fondamentaux de l'algorithmique distribuée dans ce type d'environnement. Du fait de la nature de ces réseaux, nous avons considéré des modèles de calculs, où chaque étape ne fait collaborer que des noeuds directement voisins. Nous avons notamment proposé un nouveau cadre d'analyse, combinant réétiquetages de graphes dynamiques et graphes évolutifs (modèle combinatoire pour els réseaux dynamiques). Notre approche permet de caractériser les conditions d'un succès ou d'échec d'un algorithme en fonction de la dynamique du réseau, autrement dit, en fonction de conditions nécessaires et/ou suffisantes sur les graphes évolutifs correspondants. Nous avons également étudié la synchronisation sou-jacente aux calculs, ainsi que la manière dont une application réelle peut reposer sur un algorithme de réétiquetage. Un certain nombre de logiciels ont également été réalisés autour de ces travaux, notamment un simulateur de réétiquetage de graphes dynamiques et un vérificateur de propriétés sur les graphes évolutifs.
Download or read book Algorithmes auto stabilisants pour les r seaux ad hoc written by Karim Bessaoud and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Dans cette thèse, nous proposons trois algorithmes auto-stabilisants pour les réseaux ad hoc sans fil. Le premier est un algorithme de construction d'un ensemble connexe dominant de poids faible, appelé backbone. Le backbone est utilisé pour créer une infrastructure logique dans un réseau ad hoc. Nous avons montré par simulation l'efficacité de cet algorithme dans différents contextes selon la sémantique donnée aux poids des nœuds : le backbone pouvant contenir par exemple les nœuds les plus chargés en énergie ou les moins mobiles. Les deux autres algorithmes traitent de l'économie d'énergie dans les réseaux de capteurs. Nous proposons deux solutions basées sur le contrôle de la topologie à travers la réduction des puissances de transmission, chacune dédié à un type de communication utilisé par les capteurs : communication entre tout couple de capteurs ou par diffusion. Tous les algorithmes présentés sont prouvés formellement et évalués par simulation
Download or read book Algorithmique best effort pour les r seaux dynamiques written by and published by . This book was released on 2010 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt: Les réseaux dynamiques posent de nouvelles difficultés pour la construction d'applications réparties (mobilité, absence d'infrastructure, communication sans-fil, etc.). Les réseaux ad hoc de véhicules (VANET) représentent un des cas d'étude des réseaux dynamiques. Nous avons commencé les travaux par un état des projets européens concernant les VANETs. Ensuite, nous avons modélisé la norme IEEE 802.11, qui s'impose comme une technologie sans-fil standard pour la communication entre noeuds mobiles. Nous avons présenté l'algorithmique best-effort qui permet de compléter le concept d'auto-stabilisation afin de gérer la dynamique du réseau. C'est pourquoi nous avons introduit le concept de convergence continue. Ce concept est à rapprocher de la super-stabilisation. L'idée d'une métrique de la dynamique nous est apparue importante (comme la notion de durée d'une ronde continue). Nous avons proposé une application de l'algorithmique best-effort, à savoir un algorithme auto-stabilisant ayant une convergence continue pour la gestion de groupe. Nous avons présenté nos contributions dans la suite logicielle Airplug pour aboutir à une plate-forme complète pour l'évaluation de performances et un prototypage rapide des protocoles best-effort. Nous avons implémenté le protocole réparti GRP qui permet la gestion de groupe dans les réseaux dynamiques et évalué ses performances dans le mode Airplug-ns. Nous avons proposé des métriques appropriées, qui décrivent la stabilité des groupes, pour évaluer les performances de notre protocole.
Download or read book Localization Algorithms and Strategies for Wireless Sensor Networks Monitoring and Surveillance Techniques for Target Tracking written by Mao, Guoqiang and published by IGI Global. This book was released on 2009-05-31 with total page 526 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wireless localization techniques are an area that has attracted interest from both industry and academia, with self-localization capability providing a highly desirable characteristic of wireless sensor networks. Localization Algorithms and Strategies for Wireless Sensor Networks encompasses the significant and fast growing area of wireless localization techniques. This book provides comprehensive and up-to-date coverage of topics and fundamental theories underpinning measurement techniques and localization algorithms. A useful compilation for academicians, researchers, and practitioners, this Premier Reference Source contains relevant references and the latest studies emerging out of the wireless sensor network field.
Download or read book The Constitution of Algorithms written by Florian Jaton and published by MIT Press. This book was released on 2021-04-27 with total page 401 pages. Available in PDF, EPUB and Kindle. Book excerpt: A laboratory study that investigates how algorithms come into existence. Algorithms--often associated with the terms big data, machine learning, or artificial intelligence--underlie the technologies we use every day, and disputes over the consequences, actual or potential, of new algorithms arise regularly. In this book, Florian Jaton offers a new way to study computerized methods, providing an account of where algorithms come from and how they are constituted, investigating the practical activities by which algorithms are progressively assembled rather than what they may suggest or require once they are assembled.
Download or read book Renewable Energy for Smart and Sustainable Cities written by Mustapha Hatti and published by Springer. This book was released on 2018-11-23 with total page 571 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book features cutting-edge research presented at the second international conference on Artificial Intelligence in Renewable Energetic Systems, IC-AIRES2018, held on 24–26 November 2018, at the High School of Commerce, ESC-Koléa in Tipaza, Algeria. Today, the fundamental challenge of integrating renewable energies into the design of smart cities is more relevant than ever. While based on the advent of big data and the use of information and communication technologies, smart cities must now respond to cross-cutting issues involving urban development, energy and environmental constraints; further, these cities must also explore how they can integrate more sustainable energies. Sustainable energies are a major determinant of smart cities’ longevity. From an environmental and technological standpoint, these energies offer an optimal power supply to the electric network while creating significantly less pollution. This requires flexibility, i.e., the availability of supply and demand. The end goal of any smart city is to improve the quality of life for all citizens (both in the city and in the countryside) in a way that is sustainable and respectful of the environment. This book encourages the reader to engage in the preservation of our environment, every moment, every day, so as to help build a clean and healthy future, and to think of the future generations who will one day inherit our planet. Further, it equips those whose work involves energy systems and those engaged in modelling artificial intelligence to combine their expertise for the benefit of the scientific community and humanity as a whole.
Download or read book FiWi Access Networks written by Martin Maier and published by Cambridge University Press. This book was released on 2011-12-15 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt: The evolution of broadband access networks toward bimodal fiber-wireless (FiWi) access networks, described in this book, may be viewed as the endgame of broadband access. After discussing the economic impact of broadband access and current worldwide deployment statistics, all the major legacy wireline and wireless broadband access technologies are reviewed. State-of-the-art GPON and EPON fiber access networks are described, including their migration to next-generation systems such as OCDMA and OFDMA PONs. The latest developments of wireless access networks are covered, including VHT WLAN, Gigabit WiMAX, LTE and WMN. The advantages of FiWi access networks are demonstrated by applying powerful network coding, heterogeneous optical and wireless protection, hierarchical frame aggregation, hybrid routing and QoS continuity techniques across the optical-wireless interface. The book is an essential reference for anyone working on optical fiber access networks, wireless access networks or converged FiWi systems.
Download or read book Distributed Operating Systems written by Yakup Paker and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt: This text comprises the edited collection of papers presented at the NATO Advanced Study Institute which took place at Altmyunus,
Download or read book Graph Colouring and the Probabilistic Method written by Michael Molloy and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over the past decade, many major advances have been made in the field of graph coloring via the probabilistic method. This monograph, by two of the best on the topic, provides an accessible and unified treatment of these results, using tools such as the Lovasz Local Lemma and Talagrand's concentration inequality.
Download or read book Measuring Mental Disorders written by Philippe Le Moigne and published by Elsevier. This book was released on 2018-11-21 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a collective work draws on the perspective of social sciences, mobilizing perspectives from the sociology of science, the history of psychiatry, medical ethnography and public policy analysis. This initiative, which has no precedent in social sciences, is surrounded by an original, if not apparently paradoxical statement: considering that the deployment of these processes, strictly formal and depersonalized, is justified in becoming the rule in a society known as "individuals". - Presents the measurement of mental disorders (tests / scales) across the various sectors - Determines the underpinning of this measure and its performance - Explains the rise of these tests and its success - Understands its impact on users
Download or read book Statistical Implicative Analysis written by Régis Gras and published by Springer Science & Business Media. This book was released on 2008-04-29 with total page 511 pages. Available in PDF, EPUB and Kindle. Book excerpt: Statistical implicative analysis is a data analysis method created by Régis Gras almost thirty years ago which has a significant impact on a variety of areas ranging from pedagogical and psychological research to data mining. Statistical implicative analysis (SIA) provides a framework for evaluating the strength of implications; such implications are formed through common knowledge acquisition techniques in any learning process, human or artificial. This new concept has developed into a unifying methodology, and has generated a powerful convergence of thought between mathematicians, statisticians, psychologists, specialists in pedagogy and last, but not least, computer scientists specialized in data mining. This volume collects significant research contributions of several rather distinct disciplines that benefit from SIA. Contributions range from psychological and pedagogical research, bioinformatics, knowledge management, and data mining.
Download or read book Selected Areas in Cryptography SAC 2018 written by Carlos Cid and published by Springer. This book was released on 2019-01-12 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book contains revised selected papers from the 25th International Conference on Selected Areas in Cryptography, SAC 2018, held in Calgary, AB, Canada in August 2018. The 22 full papers presented in this volume were carefully reviewed and selected from 57 submissions. They cover the following research areas: design and analysis of symmetric key primitives and cryptosystems, including block and stream ciphers, hash functions, MAC algorithms, and authenticated encryption schemes efficient implementations of symmetric and public key algorithms mathematical and algorithmic aspects of applied cryptology cryptography for the Internet of Things
Download or read book Between what we say and what we think Where is mediatization written by Jairo Ferreira and published by FACOS-UFSM. This book was released on 2018-12-21 with total page 366 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Advanced Intelligent Systems for Sustainable Development AI2SD 2020 written by Janusz Kacprzyk and published by Springer Nature. This book was released on 2022-02-10 with total page 1298 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book publishes the best papers accepted and presented at the 3rd edition of the International Conference on Advanced Intelligent Systems for Sustainable Development Applied to Agriculture, Energy, Health, Environment, Industry, Education, Economy, and Security (AI2SD’2020). This conference is one of the biggest amalgamations of eminent researchers, students, and delegates from both academia and industry where the collaborators have an interactive access to emerging technology and approaches globally. In this book, readers find the latest ideas addressing technological issues relevant to all areas of the social and human sciences for sustainable development. Due to the nature of the conference with its focus on innovative ideas and developments, the book provides the ideal scientific and brings together very high-quality chapters written by eminent researchers from different disciplines, to discover the most recent developments in scientific research.
Download or read book Transport of Dangerous Goods written by Emmanuel Garbolino and published by Springer Science & Business Media. This book was released on 2012-02-13 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book addresses the various risks associated with the transport of dangerous goods within a territory. The emphasis of the contributions is on methods and tools to reduce the vulnerability of both the environment and human society to accidents or malicious acts involving such transport. With topics ranging from game theory to governance principles, the authors together cover technical, legal, financial, and logistic aspects of this problem. The intended audience includes responsible persons in territorial organizations, managers of transport infrastructures, as well as students, teachers and researchers wishing to deepen their knowledge in this area.
Download or read book NS Simulator for Beginners written by Eitan Altman and published by Morgan & Claypool Publishers. This book was released on 2012-01-01 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt: NS-2 is an open-source discrete event network simulator which is widely used by both the research community as well as by the people involved in the standardization protocols of IETF. The goal of this book is twofold: on one hand to learn how to use the NS-2 simulator, and on the other hand, to become acquainted with and to understand the operation of some of the simulated objects using NS-2 simulations. The book is intended to help students, engineers or researchers who need not have much background in programming or who want to learn through simple examples how to analyse some simulated objects using NS-2. Simulations may differ from each other in many aspects: the applications, topologies, parameters of network objects (links, nodes) and protocols used, etc. The first chapter is a general introduction to the book, where the importance of NS-2 as a tool for a good comprehension of networks and protocols is stated. In the next chapters we present special topics as TCP, RED, etc., using NS-2 as a tool for better understanding the protocols. We provide in the appendices a review of Random Variables and Confidence Intervals, as well as a first sketch for using the new NS-3 simulator. Table of Contents: Introduction / NS-2 Simulator Preliminaries / How to work with trace files / Description and simulation of TCP/IP / Routing and network dynamics / RED: Random Early Discard / Differentiated Services / Mobile Networks and Wireless Local Area Networks / Classical queueing models / Tcl and C++ linkage
Download or read book Green Networking written by Francine Krief and published by John Wiley & Sons. This book was released on 2012-12-13 with total page 235 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book focuses on green networking, which is an important topic for the scientific community composed of engineers, academics, researchers and industrialists working in the networking field. Reducing the environmental impact of the communications infrastructure has become essential with the ever increasing cost of energy and the need for reducing global CO2 emissions to protect our environment. Recent advances and future directions in green networking are presented in this book, including energy efficient networks (wired networks, wireless networks, mobile networks), adaptive networks (cognitive radio networks, green autonomic networking), green terminals, and industrial research into green networking (smart city, etc.).
