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Author: Emmanuel Lance
Publisher:
ISBN:
Category :
Languages : fr
Pages :
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Author: Emmanuel Lance
Publisher:
ISBN:
Category :
Languages : fr
Pages :
Get Book Here
Book Description
Author: Emmanuel Lance
Publisher:
ISBN:
Category :
Languages : fr
Pages : 114
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Book Description
UNE TRANSMISSION SUR UN CANAL DE COMMUNICATION PERTURBE PAR UN BRUIT INTENTIONNEL MET EN JEU DEUX PROTAGONISTES : LE COMMUNICANT, DONT LE BUT EST D'ETABLIR UNE COMMUNICATION, ET LE BROUILLEUR QUI SOUHAITE EMPECHER CETTE COMMUNICATION. LE PARAMETRE CLE EST LE RAPPORT DE L'ENERGIE PAR BIT TRANSMIS ET DE LA DENSITE SPECTRALE DE PUISSANCE DU BROUILLEUR, NORMALISEE A LA LARGEUR DE BANDE OCCUPEE PAR LE SIGNAL UTILE. DANS CES CONDITIONS, LES STRATEGIES D'ETALEMENT DE SPECTRE PROPOSENT DE TRANSMETTRE LE SIGNAL DU COMMUNICANT SUR UNE BANDE DE FREQUENCE BEAUCOUP PLUS GRANDE QUE CE QUI SERAIT NECESSAIRE, DE FACON A AUGMENTER CE RAPPORT. POUR POUVOIR TIRER LE MEILLEUR PARTI DE L'ETALEMENT DE SPECTRE, IL CONVIENT D'IMPOSER AU PIRE CAS DE BROUILLAGE (CELUI QUI INDUIT LA PROBABILITE D'ERREUR LA PLUS GRANDE POUR LE COMMUNICANT) D'ETRE A LARGE BANDE, C'EST A DIRE D'OCCUPER TOUTE LA BANDE UTILE. NOUS NOUS SOMMES INTERESSES A DES SYSTEMES POSSEDANT CETTE PROPRIETE. NOUS REMARQUONS TOUT D'ABORD QU'UN SYSTEME DE PORTEUSES MULTIPLES A ETALEMENT DE SPECTRE EST PARTICULIEREMENT EFFICACE POUR COMBATTRE UN BROUILLEUR A BANDE LIMITEE, SI LES IMPULSIONS SONT MISES EN FORME SPECTRALEMENT. NOUS ETUDIONS ENSUITE LES FORMES DE CODAGE CORRECTEUR D'ERREUR QUI PEUVENT S'APPLIQUER A UN TEL SYSTEME. EN PARTICULIER, NOUS METTONS EN EVIDENCE QU'UN CODAGE CORRECTEUR D'ERREUR EST PREFERABLE A LA REPETITION PURE. NOUS FAISONS EVOLUER LE SYSTEME A PORTEUSES MULTIPLES VERS UN SYSTEME A SAUT DE FREQUENCE COHERENT, AVEC TRANSMISSION EN PARALLELE DE REPLIQUES DE DIVERSITE. NOUS REMARQUONS QUE CE SYSTEME PEUT AUSSI FORCER LE PIRE BROUILLEUR A ETRE A LARGE BANDE. LES SIGNAUX ENVISAGES SONT A PRIORI SENSIBLES A DES DISTORSIONS NON LINEAIRES. NOUS PROPOSONS ALORS PLUSIEURS METHODES PERMETTANT DE MINIMISER LES DEGRADATIONS APPORTEES PAR UN CANAL NON LINEAIRE. NOUS REMARQUONS QU'UNE COMBINAISON OPTIMALE DES REPLIQUES DE DIVERSITE REND LE BRUIT D'INTERMODULATION NEGLIGEABLE.
Author:
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Category : Telecommunication
Languages : en
Pages : 540
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Author: Dominique Rostolland
Publisher:
ISBN:
Category :
Languages : fr
Pages : 476
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Author: Sven Boermeester
Publisher:
ISBN: 9781949677072
Category :
Languages : en
Pages :
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Book Description
Innovate Bristol highlights and celebrates those companies and individuals that are actively working at building a better tomorrow for all. Innovation Ecosystems thrive through the involvement and support of companies and individuals from all industries, which is why the Innovate series not only focuses on the innovators but also those people whom the Innovation Ecosystem, would not be able to thrive without.
Author: Kenneth Burke
Publisher: Univ of California Press
ISBN: 9780520016101
Category : Biography & Autobiography
Languages : en
Pages : 340
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Book Description
"But the point of Burke's work, and the significance of his achievement, is not that he points out that religion and language affect each other, for this has been said before, but that he proceeds to demonstrate how this is so by reference to a specific symbolic context. After a discussion 'On Words and The Word,' he analysess verbal action in St. Augustine's Confessions. He then discusses the first three chapters of Genesis, and ends with a brilliant and profound 'Prologue in Heaven,' an imaginary dialogue between the Lord and Satan in which he proposes that we begin our study of human motives with complex theories of transcendence,' rather than with terminologies developed in the use of simplified laboratory equipment. . . . Burke now feels, after some forty years of search, that he has created a model of the symbolic act which breaks through the rigidities of the 'sacred-secular' dichotomy, and at the same time shows us how we get from secular and sacred realms of action over the bridge of language. . . . Religious systems are systems of action based on communication in society. They are great social dramas which are played out on earth before an ultimate audience, God. But where theology confronts the developed cosmological drama in the 'grand style,' that is, as a fully developed cosmological drama for its religious content, the 'logologer' can be further studied not directly as knowledge but as anecdotes that help reveal for us the quandaries of human governance." --Hugh Dalziel Duncan from Critical Responses to Kenneth Burke, 1924 - 1966, edited by William H. Rueckert (Minneapolis: University of Minnesota Press, 1969).
Author: Jacqueline Ki-Zerbo
Publisher: Univ of California Press
ISBN: 9780520066960
Category : History
Languages : en
Pages : 372
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Book Description
"This volume covers the period from the end of the Neolithic era to the beginning of the seventh century of our era. This lengthy period includes the civilization of Ancient Egypt, the history of Nubia, Ethiopia, North Africa and the Sahara, as well as of the other regions of the continent and its islands."--Publisher's description
Author: Martin Lindstrom
Publisher: Currency
ISBN: 0385523890
Category : Business & Economics
Languages : en
Pages : 274
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Book Description
NEW YORK TIMES BESTSELLER • “A fascinating look at how consumers perceive logos, ads, commercials, brands, and products.”—Time How much do we know about why we buy? What truly influences our decisions in today’s message-cluttered world? In Buyology, Martin Lindstrom presents the astonishing findings from his groundbreaking three-year, seven-million-dollar neuromarketing study—a cutting-edge experiment that peered inside the brains of 2,000 volunteers from all around the world as they encountered various ads, logos, commercials, brands, and products. His startling results shatter much of what we have long believed about what captures our interest—and drives us to buy. Among the questions he explores: • Does sex actually sell? • Does subliminal advertising still surround us? • Can “cool” brands trigger our mating instincts? • Can our other senses—smell, touch, and sound—be aroused when we see a product? Buyology is a fascinating and shocking journey into the mind of today's consumer that will captivate anyone who's been seduced—or turned off—by marketers' relentless attempts to win our loyalty, our money, and our minds.
Author: Nick Crossley
Publisher: Wiley-Blackwell
ISBN: 9781405123655
Category : Social Science
Languages : en
Pages : 192
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Book Description
Critiquing Habermas, this volume bring fresh perspectives and ideas to bear on debates about the public sphere. Engages in different ways with Jürgen Habermas’s seminal study, The Structural Transformation of the Public Sphere. Moves beyond Habermas by reflecting on current social processes and events, such as anti-corporate protests and the emergence of the Internet. Considers alternative theories by Bakhtin, Bourdieu and Honneth, among others. Combines work by established commentators and new researchers.
Author: Linda Strande
Publisher: IWA Publishing
ISBN: 1780404735
Category : Technology & Engineering
Languages : en
Pages : 428
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Book Description
It is estimated that literally billions of residents in urban and peri-urban areas of Africa, Asia, and Latin America are served by onsite sanitation systems (e.g. various types of latrines and septic tanks). Until recently, the management of faecal sludge from these onsite systems has been grossly neglected, partially as a result of them being considered temporary solutions until sewer-based systems could be implemented. However, the perception of onsite or decentralized sanitation technologies for urban areas is gradually changing, and is increasingly being considered as long-term, sustainable options in urban areas, especially in low- and middle-income countries that lack sewer infrastructures. This is the first book dedicated to faecal sludge management. It compiles the current state of knowledge of the rapidly evolving field of faecal sludge management, and presents an integrated approach that includes technology, management, and planning based on Sandecs 20 years of experience in the field. Faecal Sludge Management: Systems Approach for Implementation and Operation addresses the organization of the entire faecal sludge management service chain, from the collection and transport of sludge, and the current state of knowledge of treatment options, to the final end use or disposal of treated sludge. The book also presents important factors to consider when evaluating and upscaling new treatment technology options. The book is designed for undergraduate and graduate students, and engineers and practitioners in the field who have some basic knowledge of environmental and/or wastewater engineering.
