Using mathematical tools from number theory and finite fields, this text presents practical methods for solving problems in data security and data integrity. It covers many algorithms that arise in cryptography and error-control codes. Along with doubling the number of exercises, this edition includes a new appendix that reviews prerequisite topics in algebra and number theory. The accompanying CD-ROM contains an interactive version of the book that is powered by Scientific Notebook ® , a mathematical word processor and easy-to-use computer algebra system. A solutions manual is available for qualifying instructors.
• Discrete Mathematics and Its Applications
Algebra
Combinatorics
Cryptology
Textbook
Undergraduate

ENCOUNTER

Cuando nos agobian la necesidad, las dificultades y los problemas, solemos dejarnos abatir por la desesperación, o bien nos enfrentamos a ellos con uñas y dientes. Aparentemente esto es lo correcto. Sin embargo, sólo recurriendo a un plano más elevado que aquél en que reside el problema, podremos asegurarnos la victoria.Todas la dificultades que nos aquejan tienen su origen en nuestros componentes físico, mental y emocional, por ello su solución definitiva podrá encontrarse sólo en unnivel superior: el espiritual. Pero salvo en casos extremos, solemos ignorar nuetsra dimensión espiritual, perdiendo así la oportunidad de conectarnos con los planos más elevados de la existencia, en los que residen fuerzas e inteligencias poderosísimas cuyo mayor deseo y satisfacción sería ayudarnos. Aunque pertenecen al plano espiritual, los ángeles están muy cerca sólo esperan una señal para ponerse a solucionar nuetsros problemas. Pero esa señal debemos dársela nosotros. Es todo lo que tenemos que hac -

Significantly updated, revised, and expanded, this second edition presents the basic principles of ecotoxicology along with the major organic pollutants. Two new chapters cover endocrine disruptors and neurotoxicity and its behavioral effects. The text also provides additional information on biomarker approaches and offers an overview of new technologies, such as microarray assays, that are being developed to address complex pollution problems. Through a mechanistic approach, this book continues to provide essential knowledge of toxic mechanisms that produce adverse ecological effects, serving as valuable guidance for carrying out the risk assessment of environmental chemicals.
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Environmental & Ecological Toxicology
Chemical Engineering
Reference
Professional

COL. EL BARCO DE VAPOR - SABER

An easily accessible introduction to wavelet analysis, this book explains the subject using algebra and some basic calculus and stresses applications, such as speech compression, removing noise from audio and images, image compression, and image enhancement. The author offers downloadable software that permits recording, playing, and modifying sound files using wavelet techniques, plus a facility for displaying, printing, and modifying standard IEEE gray field images. New sections include Biorthogonal Wavelets, The JPEG200 Image Compression Standard, Spectrograms, Analyzing Speech and Music with Spectrograms, Wavelet-Based Denoising of Images, and Thresholding Spectrograms for Denoising.
• Studies in Advanced Mathematics
Differential Equations
Mathematics & Statistics for Engineers
Advanced Mathematics
Reference
Professional