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One of the most spectacular discoveries of molecular astronomy has been the detection of maser emission. The same radiation that is generated in the laboratory only with elaborate, special equipment occurs naturally in interstellar space. This intense radiation probes the smallest structures that can be studied with radio telescopes. By a fortunate coincidence maser radiation is generated in both star forming regions and the envelopes of late-type stars. The early and late stages in the life of a star are considered to be the most interesting phases of stellar evolution. Maser emission has also been detected in external galaxies. This book provides an extensive coverage of the interstellar m...
In keeping with the spirit of the first edition, Teaching ESL Composition: Purpose, Process, and Practice, Second Edition presents pedagogical approaches to the teaching of ESL composition in the framework of current theoretical perspectives on second language writing processes, practices, and writers. The text as a whole moves from general themes to specific pedagogical concerns. A primary goal is to offer a synthesis of theory and practice in a rapidly evolving community of scholars and professionals. The focus is on providing apprentice teachers with practice activities that can be used to develop the complex skills involved in teaching second language writing. Although all topics are fir...