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Easy-to-read text and full-color photographs depict the physical characteristics, habitat, and life cycle of birds.
This, the first full-length biography of Edward Emerson Barnard, tells the remarkable tale of endurance and achievement of one of the leading astronomers of the late nineteenth and early twentieth century. Through his career, Barnard scoured the heavens endlessly, leaving an astonishing legacy of observations - of planets, satellites, comets, double stars, bright and dark nebulae, and globular clusters - that make him one of the greatest observers of all time.Beautifully illustrated throughout, this book includes many of Barnard's famous wide-field photographs of comets and the Milky Way. It provides a complete history of Barnard's fascinating life and work, and offers unusual insight into the astronomers he knew and observatories with which he was associated and will be of interest to astronomers and historians of science.
Presents an introduction to fishes, discussing their physical characteristics, different types, eating habits, life cycle, and future threats to ocean fish due to overfishing.
Antennas are used across a wide range of frequencies in the electromagnetic spectrum to concentrate wave energy into electronic circuits. The principles that govern the operation of conventional radio-frequency antennas can be extended to much higher frequencies and be applied to produce nano-metallic (i.e. plasmonic) antennas that act as "receivers" and "transmitters" for visible light. These traits make them excellent candidates for light trapping in solar cells, light concentration in sub-wavelength photodetectors, or even localized heating for cancer therapies. The unique optical properties of metals at visible frequencies make it difficult to apply traditional antenna design rules. Usin...
Presents an introduction to frogs, discussing their physical characteristics, different types, eating habits, life cycle, and future threats to their existence.