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Author: Qianxue Wang
Publisher:
ISBN:
Category :
Languages : en
Pages : 144
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Book Description
In this thesis, a new way to generate pseudo random numbers is presented. The proposition is to mix two exiting generators with discrete chaotic iterations that satisfy the Devaney's definition of chaos. A rigorous framework is introduced, where topological properties of the resulting generator are given, and two practical designs are presented and evaluated. It is shown that the statistical quality of the inputted generators can be greatly improved by this way, thus fulfilling the up-to-date standards. Comparison between these two designs and existing generators are investigated in details. Among other things, it is established that the second designed technique out performs the first one, both in terms of performance and speed. In the first part of this manuscript, the iteration function embedded into chaotic iterations is the vectorial Boolean negation. In the second part, we propose a method using graphs having strongly connected components as a selection criterion. We are thus able to modify the iteration function without deflating the good properties of the associated generator. Simulation resultsand basic security analysis are then presented to evaluate the randomness of this new family o fpseudo random generators. Finally, an illustration in the field of information hiding is presented, and the robustness of the obtained data hiding algorithm against attacks is evaluated.
Author: Qianxue Wang
Publisher:
ISBN:
Category :
Languages : en
Pages : 144
Get Book Here
Book Description
In this thesis, a new way to generate pseudo random numbers is presented. The proposition is to mix two exiting generators with discrete chaotic iterations that satisfy the Devaney's definition of chaos. A rigorous framework is introduced, where topological properties of the resulting generator are given, and two practical designs are presented and evaluated. It is shown that the statistical quality of the inputted generators can be greatly improved by this way, thus fulfilling the up-to-date standards. Comparison between these two designs and existing generators are investigated in details. Among other things, it is established that the second designed technique out performs the first one, both in terms of performance and speed. In the first part of this manuscript, the iteration function embedded into chaotic iterations is the vectorial Boolean negation. In the second part, we propose a method using graphs having strongly connected components as a selection criterion. We are thus able to modify the iteration function without deflating the good properties of the associated generator. Simulation resultsand basic security analysis are then presented to evaluate the randomness of this new family o fpseudo random generators. Finally, an illustration in the field of information hiding is presented, and the robustness of the obtained data hiding algorithm against attacks is evaluated.
Author: Benoit B. Mandelbrot
Publisher: Profile Books
ISBN: 1847651550
Category : Business & Economics
Languages : en
Pages : 352
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Book Description
This international bestseller, which foreshadowed a market crash, explains why it could happen again if we don't act now. Fractal geometry is the mathematics of roughness: how to reduce the outline of a jagged leaf or static in a computer connection to a few simple mathematical properties. With his fractal tools, Mandelbrot has got to the bottom of how financial markets really work. He finds they have a shifting sense of time and wild behaviour that makes them volatile, dangerous - and beautiful. In his models, the complex gyrations of the FTSE 100 and exchange rates can be reduced to straightforward formulae that yield a much more accurate description of the risks involved.
Author: Claude Cohen-Tannoudji
Publisher: John Wiley & Sons
ISBN: 3527345558
Category : Science
Languages : en
Pages : 790
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Book Description
This new, third volume of Cohen-Tannoudji's groundbreaking textbook covers advanced topics of quantum mechanics such as uncorrelated and correlated identical particles, the quantum theory of the electromagnetic field, absorption, emission and scattering of photons by atoms, and quantum entanglement. Written in a didactically unrivalled manner, the textbook explains the fundamental concepts in seven chapters which are elaborated in accompanying complements that provide more detailed discussions, examples and applications. * Completing the success story: the third and final volume of the quantum mechanics textbook written by 1997 Nobel laureate Claude Cohen-Tannoudji and his colleagues Bernard Diu and Franck Laloë * As easily comprehensible as possible: all steps of the physical background and its mathematical representation are spelled out explicitly * Comprehensive: in addition to the fundamentals themselves, the books comes with a wealth of elaborately explained examples and applications Claude Cohen-Tannoudji was a researcher at the Kastler-Brossel laboratory of the Ecole Normale Supérieure in Paris where he also studied and received his PhD in 1962. In 1973 he became Professor of atomic and molecular physics at the Collège des France. His main research interests were optical pumping, quantum optics and atom-photon interactions. In 1997, Claude Cohen-Tannoudji, together with Steven Chu and William D. Phillips, was awarded the Nobel Prize in Physics for his research on laser cooling and trapping of neutral atoms. Bernard Diu was Professor at the Denis Diderot University (Paris VII). He was engaged in research at the Laboratory of Theoretical Physics and High Energy where his focus was on strong interactions physics and statistical mechanics. Franck Laloë was a researcher at the Kastler-Brossel laboratory of the Ecole Normale Supérieure in Paris. His first assignment was with the University of Paris VI before he was appointed to the CNRS, the French National Research Center. His research was focused on optical pumping, statistical mechanics of quantum gases, musical acoustics and the foundations of quantum mechanics.
Author: Placide Tempels
Publisher:
ISBN: 9781884631092
Category : Philosophy, Bantu
Languages : en
Pages : 189
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Book Description
Author: Alexandre Girouard
Publisher: American Mathematical Soc.
ISBN: 147042665X
Category : Mathematics
Languages : en
Pages : 298
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Book Description
A co-publication of the AMS and Centre de Recherches Mathématiques The book is a collection of lecture notes and survey papers based on the mini-courses given by leading experts at the 2015 Séminaire de Mathématiques Supérieures on Geometric and Computational Spectral Theory, held from June 15–26, 2015, at the Centre de Recherches Mathématiques, Université de Montréal, Montréal, Quebec, Canada. The volume covers a broad variety of topics in spectral theory, highlighting its connections to differential geometry, mathematical physics and numerical analysis, bringing together the theoretical and computational approaches to spectral theory, and emphasizing the interplay between the two.
Author: Sacha Baginsky
Publisher: Springer Science & Business Media
ISBN: 376437439X
Category : Science
Languages : en
Pages : 362
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Book Description
This volume aims to provide a timely view of the state-of-the-art in systems biology. The editors take the opportunity to define systems biology as they and the contributing authors see it, and this will lay the groundwork for future studies. The volume is well-suited to both students and researchers interested in the methods of systems biology. Although the focus is on plant systems biology, the proposed material could be suitably applied to any organism.
Author: Aidan Southall
Publisher: LIT Verlag Münster
ISBN: 9783825861193
Category : History
Languages : en
Pages : 464
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Book Description
Alur Society became a classic for a number of reasons. Being much more than a descriptive account of an African society, it was the first intensive ethnography to adopt the ideas of Max Weber. It pioneered the idea that religion and ritual could be the basis of political action. It also showed how state systems could evolve not just on the basis of conquest but as a result of societies without kings inviting those with kings to govern them. Author Aidan Southall's theory of the segmentary state was adopted by political anthropologists throughout the subject and also by political scientists, being applied not just to Africa but also to India and other parts of the world. The book was able to arrive at such long-lasting and imaginative conclusions through the use of ethnographic material of a quality rarely surpassed. It is moreover arguably the best book in social anthropology of a Nilotic-speaking people. Southall's own command of their language and his overall scholarly knowledge of Nilotes is also unsurpassed.
Author: Andrew P. Black
Publisher: Lulu.com
ISBN: 3952334146
Category : Computers
Languages : en
Pages : 352
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Book Description
Pharo is a modern open-source development environment for the classic Smalltalk-80 programming language. This book, intended for both students and developers, will guide you gently through the language and tools by means of a series of examples and exercises. We are making this book available to you under the Creative Commons Attribution-ShareAlike 3.0 license. You can either download the PDF for free from PharoByExample.org, or you can buy a softcover copy from lulu.com. (You can also pay for the PDF download from lulu.com, if you would like to make a contribution to this effort.) Additional material is available from the book's web page at PharoByExample.org.
Author: M. B. Paranjape
Publisher: Springer Nature
ISBN: 3030557774
Category : Electronic books
Languages : en
Pages : 670
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Book Description
This volume of the CRM Conference Series is based on a carefully refereed selection of contributions presented at the "11th International Symposium on Quantum Theory and Symmetries", held in Montreal, Canada from July 1-5, 2019. The main objective of the meeting was to share and make accessible new research and recent results in several branches of Theoretical and Mathematical Physics, including Algebraic Methods, Condensed Matter Physics, Cosmology and Gravitation, Integrability, Non-perturbative Quantum Field Theory, Particle Physics, Quantum Computing and Quantum Information Theory, and String/ADS-CFT. There was also a special session in honour of Decio Levi. The volume is divided into sections corresponding to the sessions held during the symposium, allowing the reader to appreciate both the homogeneity and the diversity of mathematical tools that have been applied in these subject areas. Several of the plenary speakers, who are internationally recognized experts in their fields, have contributed reviews of the main topics to complement the original contributions. .
Author: Mark Mason
Publisher: John Wiley & Sons
ISBN: 1444307363
Category : Education
Languages : en
Pages : 256
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Book Description
A collection of scholarly essays, Complexity Theory and thePhilosophy of Education provides an accessible theoreticalintroduction to the topic of complexity theory while consideringits broader implications for educational change. Explains the contributions of complexity theory to philosophyof education, curriculum, and educational research Brings together new research by an international team ofcontributors Debates issues ranging from the culture of curriculum, to theimplications of work of key philosophers such as Foucault and JohnDewey for educational change Demonstrates how social scientists and social and educationpolicy makers are drawing on complexity theory to answer questionssuch as: why is it that education decision-makers are so resistantto change; how does change in education happen; and what does ittake to make these changes sustainable? Considers changes in use of complexity theory; developedprincipally in the fields of physics, biology, chemistry, andeconomics, and now being applied more broadly to the socialsciences and to the study of education
