Victor Chen – författare

The Doppler Effect can be thought of as the change in frequency of a wave for an observer moving relative to the source of the wave. In radar, it is used to measure the velocity of detected objects. This highly practical resource provides thorough working knowledge of the micro-Doppler effect in radar, including its principles, applications and implementation with MATLAB codes. The book presents code for simulating radar backscattering from targets with various motions, generating micro-Doppler signatures, and analyzing the characteristics of targets. In this title, professionals will find detailed descriptions of the physics and mathematics of the Doppler and micro-Doppler effect. The book provides a wide range of clear examples, including an oscillating pendulum, a spinning and precession heavy top, rotating rotor blades of a helicopter, rotating wind-turbine blades, a person walking with swinging arms and legs, a flying bird, and movements of quadruped animals.

This volume brings together conceptualizations and empirical studies that explore the socio-cultural dimension of new media and its implications on learning in the 21st century classroom. The authors articulate their vision of new-media-enhanced learning at a global level. The high-level concept is then re-examined for different degrees of contextualization and localization, for example how a specific form of new media (e-reader) changes specific activities in different cultures. In addition, studies based in Singapore classrooms provide insights as to how these concepts are being transformed and implemented by a co-constructive effort on the part of researchers, teachers and students. Singapore classrooms offer a unique environment to study the theory-practice nexus in that they are high achieving, implicitly grounded in the eastern cultural values and well-equipped with ICT infrastructure. While these studies are arguably the state-of-the-art exemplars that synergize socio-cultural and technological affordances of the current learning environments, they also serve as improvable ideas for further innovations. The interplay between theory and practice lends support to the reciprocal improvements for both. This book contributes to the continuing debate in the field, and will lead to better learning environments in the 21st century.