Estudios generales











The core of the book is a comparative analysis of markers within conversational discourse collected by Dr. Schiffrin during sociolinguistic fieldwork. The study concludes that markers provide contextual coordinates which aid in the production and interpretation of coherent conversation at both local and global levels of organization.

This textbook provides senior undergraduates studying modern optics with a comprehensive account of optics and optical electronics. A large number of solved and unsolved problems are included in the book. The extensive coverage makes it valuable to postgraduates, and also to optical engineers, as a source of basic design information.The initial chapters cover the basic principles involved in the propagation of electromagnetic waves. These are followed by a description of diffraction and its application to spatial frequency filtering and holography. Laser theory and the various types of laser are covered, as well as the theory of optical waveguides, fibre optics and integrated optics. The final chapters cover electrooptics, acoustooptics, and nonlinear optical effects.