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New Pedagogical Challenges in the 21st Century
The societies of the twenty-first century are subject to social, cultural, political, and economic changes. In this context, the school is asked to educate the future citizens in the present. To respond to this kaleidoscopic reality, the school is immersed in a pedagogical revolution. In this book, the reader will find a selection of avant-garde research works from different disciplines and contexts, which have their epicenter in the school and in the faculties of education. New issues in pedagogy and education, and new roles of teachers and students, are discussed in a global and diverse context. And new methodological and formative proposals are also proposed to build the ideal school and the ideal teacher, from the initial and continuous teacher training.
Italy Revisited
Drawing out her mother's childhood memories of life in southern Italy at the dawn of the twentieth century, Mary Melfi takes an unconventional approach to autobiographical writing. Italy Revisited serves as a double memoir, told in dialogue between a mother and a daughter. The conversation takes the reader to a medieval town high up in the mountains where time is told by the shadow the sun casts, where wheat and olive oil are the currency of choice (barter is in use), and where marriage is as much about property as it is about love. As they re-create that vanished world, the pair finds greater understanding of the tumultuous relationships that sometimes exist between immigrant mothers and their children.
Array Beamforming with Linear Difference Equations
This book studies the link between differential beamforming and differential equations which in turn enables the study of fundamental theory and methods of beamforming from a different perspective, leading to new insights into the problem and new methods to solve the problem. The book first presents a brief overview of the problems and methods for beamforming and some performance measures popularly used either to evaluate beamformers or to derive optimal beamformers. Then, first-order, second-order, and general high-order linear difference equations are discussed, based on which the authors show how to formulate the beamforming problem and derive different beamforming methods, including fixe...
A Perspective on Stereophonic Acoustic Echo Cancellation
Single-channel hands-free teleconferencing systems are becoming popular. In order to enhance the communication quality of these systems, more and more stereophonic sound devices with two loudspeakers and two microphones are deployed. Because of the coupling between loudspeakers and microphones, there may be strong echoes, which make real-time communication very difficult. The best way we know to cancel these echoes is via a stereo acoustic echo canceller (SAEC), which can be modelled as a two-input/two-output system with real random variables. In this work, the authors recast this problem into a single-input/single-output system with complex random variables thanks to the widely linear model. From this new convenient formulation, they re-derive the most important aspects of a SAEC, including identification of the echo paths with adaptive filters, double-talk detection, and suppression.
Signal Enhancement with Variable Span Linear Filters
This book introduces readers to the novel concept of variable span speech enhancement filters, and demonstrates how it can be used for effective noise reduction in various ways. Further, the book provides the accompanying Matlab code, allowing readers to easily implement the main ideas discussed. Variable span filters combine the ideas of optimal linear filters with those of subspace methods, as they involve the joint diagonalization of the correlation matrices of the desired signal and the noise. The book shows how some well-known filter designs, e.g. the minimum distortion, maximum signal-to-noise ratio, Wiener, and tradeoff filters (including their new generalizations) can be obtained using the variable span filter framework. It then illustrates how the variable span filters can be applied in various contexts, namely in single-channel STFT-based enhancement, in multichannel enhancement in both the time and STFT domains, and, lastly, in time-domain binaural enhancement. In these contexts, the properties of these filters are analyzed in terms of their noise reduction capabilities and desired signal distortion, and the analyses are validated and further explored in simulations.
Fundamentals of Spherical Array Processing
This book provides a comprehensive introduction to the theory and practice of spherical microphone arrays, and was written for graduate students, researchers and engineers who work with spherical microphone arrays in a wide range of applications. The new edition includes additions and modifications, and references supplementary Matlab code to provide the reader with a straightforward start for own implementations. The book is also accompanied by a Matlab manual, which explains how to implement the examples and simulations presented in the book. The first two chapters provide the reader with the necessary mathematical and physical background, including an introduction to the spherical Fourier...
Lacquer: Technology and Conservation
This reference tool covers the technology and methods of treatment for both types of lacquer and assesses current practices. It describes production technology and decorative techniques and discusses the materials used in Asian lacquer.
Digital Watermarking
This book presents the state-of-the-arts application of digital watermarking in audio, speech, image, video, 3D mesh graph, text, software, natural language, ontology, network stream, relational database, XML, and hardware IPs. It also presents new and recent algorithms in digital watermarking for copyright protection and discusses future trends in the field. Today, the illegal manipulation of genuine digital objects and products represents a considerable problem in the digital world. Offering an effective solution, digital watermarking can be applied to protect intellectual property, as well as fingerprinting, enhance the security and proof-of-authentication through unsecured channels.
Theory and Applications of Spherical Microphone Array Processing
This book presents the signal processing algorithms that have been developed to process the signals acquired by a spherical microphone array. Spherical microphone arrays can be used to capture the sound field in three dimensions and have received significant interest from researchers and audio engineers. Algorithms for spherical array processing are different to corresponding algorithms already known in the literature of linear and planar arrays because the spherical geometry can be exploited to great beneficial effect. The authors aim to advance the field of spherical array processing by helping those new to the field to study it efficiently and from a single source, as well as by offering ...
Canadian Families Today
This exciting collection of original essays by prominent Canadian scholars examines issues and trends affecting family life in Canada. The text is organized in five parts.The first part, "Conceptualizing the Family," presents an overview of the sociology of the family in Canada: it explores various definitions of "family" from an anthropological perspective; examines family patterns in historical and cross-cultural contexts; provides an overview of the theoretical frameworks and research methodologies for family studies; and discusses Canadian demographic trends.The life cycle is the focus of the second part of this book. In Chapter 3, Rachel Ariss shows how social expectations and ideologie...
