The present text is intended as an introduction to electromagnetics and computation of electromagnetic fields. While many texts on electromagnetics exist, the subject of computation of electromagnetic fields is nonnally not treated or is treated in a number of idealized examples, with the main emphasis on development of theoretical relations. "Why another book on Electromagnetics?" This is perhaps the first question the reader may ask when opening this book. It is a valid question, because among the many books on Electromagnetics some are excellent. We have two answers to this question, answers that have motivated the writing of this book. The first concerns the method of presentation of Electromagnetism. Generally, in classical books the material is presented in the following sequence: electrostatics, magnetostatics, magnetodynamics, and wave propagation, using integral fonns of the field equations. As a primary effect of this presentation, the reader is led to think that the knowledge of this science is synonymous to memorizing dozens offonnulas. Additionally, an impression that there is no finn connection between these equations lingers in the reader's mind since at each step new postulates are added, seemingly unrelated to previous material. Our opinion is, and we shall try to convey this to the reader, that the Electromagnetic formalism is extremely simple and based on very few equations. They are the four "Maxwell equations" which include practically all the existent relationships between the electromagnetic quantities. The only additional relationships that need be considered is the Lorentz force and the material constitutive relations.
This book addresses different aspects of the research field and a wide range of topics in speech signal processing, speech recognition and language processing. The chapters are divided in three different sections: Speech Signal Modeling, Speech Recognition and Applications. The chapters in the first section cover some essential topics in speech signal processing used for building speech recognition as well as for speech synthesis systems: speech feature enhancement, speech feature vector dimensionality reduction, segmentation of speech frames into phonetic segments. The chapters of the second part cover speech recognition methods and techniques used to read speech from various speech databases and broadcast news recognition for English and non-English languages. The third section of the book presents various speech technology applications used for body conducted speech recognition, hearing impairment, multimodal interfaces and facial expression recognition.
During the decades leading up to 1910, Portugal saw vast material improvements under the guise of modernization while in the midst of a significant political transformation - the establishment of the Portuguese First Republic. Urban planning, everyday life, and innovation merged in a rapidly changing Lisbon. Leisure activities for the citizens of the First Republic began to include new forms of musical theater, including operetta and the revue theater. These theatrical forms became an important site for the display of modernity, and the representation of a new national identity. Author João Silva argues that the rise of these genres is inextricably bound to the complex process through which the idea of Portugal was presented, naturalized, and commodified as a modern nation-state. Entertaining Lisbon studies popular entertainment in Portugal and its connections with modern life and nation-building, showing that the promotion of the nation through entertainment permeated the market for cultural goods. Exploring the Portuguese entertainment market as a reflection of ongoing negotiations between local, national, and transnational influences on identity, Silva intertwines representations of gender, class, ethnicity, and technology with theatrical repertoires, street sounds, and domestic music making. An essential work on Portuguese music in the English language, Entertaining Lisbon is a critical study for scholars and students of musicology interested in Portugal, and popular and theatrical musics, as well as historical ethnomusicologists, cultural historians, and urban planning researchers interested in the development of material culture.
This introduction to electromagnetic fields emphasizes the computation of fields and the development of theoretical relations. It presents the electromagnetic field and Maxwell's equations with a view toward connecting the disparate applications to the underlying relations, along with computational methods of solving the equations.
During the decades leading up to 1910, Portugal saw vast material improvements under the guise of modernization while in the midst of a significant political transformation - the establishment of the Portuguese First Republic. Urban planning, everyday life, and innovation merged in a rapidly changing Lisbon. Leisure activities for the citizens of the First Republic began to include new forms of musical theater, including operetta and the revue theater. These theatrical forms became an important site for the display of modernity, and the representation of a new national identity. Author João Silva argues that the rise of these genres is inextricably bound to the complex process through which the idea of Portugal was presented, naturalized, and commodified as a modern nation-state. Entertaining Lisbon studies popular entertainment in Portugal and its connections with modern life and nation-building, showing that the promotion of the nation through entertainment permeated the market for cultural goods. Exploring the Portuguese entertainment market as a reflection of ongoing negotiations between local, national, and transnational influences on identity, Silva intertwines representations of gender, class, ethnicity, and technology with theatrical repertoires, street sounds, and domestic music making. An essential work on Portuguese music in the English language, Entertaining Lisbon is a critical study for scholars and students of musicology interested in Portugal, and popular and theatrical musics, as well as historical ethnomusicologists, cultural historians, and urban planning researchers interested in the development of material culture.
This book is dedicated to the analysis of parametric amplification with special emphasis on the MOS discrete-time implementation. This implementation is demonstrated by the presentation of several circuits where the MOS parametric amplifier cell is used: small gain amplifier, comparator with embedded pre-amplification, discrete-time mixer/IIR-Filter, and analog-to-digital converter (ADC). Experimental results are shown to validate the overall design technique.
Low Power UWB CMOS Radar Sensors deals with the problem of designing low cost CMOS radar sensors. The radar sensor uses UWB signals in order to obtain a reasonable target separation capability, while maintaining a maximum signal frequency below 2 GHz. This maximum frequency value is well within the reach of current CMOS technologies. The use of UWB signals means that most of the methodologies used in the design of circuits and systems that process narrow band signals, can no longer be applied. Low Power UWB CMOS Radar Sensors provides an analysis between the interaction of UWB signals, the antennas and the processing circuits. This analysis leads to some interesting conclusions on the types of antennas and types of circuits that should be used. A methodology to compare the noise performance of UWB processing circuits is also derived. This methodology is used to analyze and design the constituting circuits of the radar transceiver. In order to validate the design methodology a CMOS prototype is designed and experimentally evaluated.
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