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Mapping the Spectrum

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Author :
Release : 2002
Genre : Research
Kind : eBook
Book Rating : 530/5 ( reviews)

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Book Synopsis Mapping the Spectrum by : Klaus Hentschel

Download or read book Mapping the Spectrum written by Klaus Hentschel. This book was released on 2002. Available in PDF, EPUB and Kindle. Book excerpt: Ever since the boom of spectrum analysis in the 1860s, spectroscopy has become one of the most fruitful research technologies in analytic chemistry, physics, astronomy, and other sciences. This book is the first in-depth study of the ways in which various types of spectra, especially the sun's Fraunhofer lines, have been recorded, displayed, and interpreted. The book assesses the virtues and pitfalls of various types of depictions, including hand sketches, woodcuts, engravings, lithographs and, from the late 1870s onwards, photomechanical reproductions. The material of a 19th-century engraver or lithographer, the daily research practice of a spectroscopist in the laboratory, or a student's use of spectrum posters in the classroom, all are looked at and documented here. For pioneers of photography such as John Herschel or Hermann Wilhelm Vogel, the spectrum even served as a prime test object for gauging the color sensitivity of their processes. This is a broad, contextual portrayal of the visual culture of spectroscopy in the 19th and early 20th centuries. The illustrations are not confined to spectra--they show instruments, laboratories, people at work, and plates of printing manuals. The result is a multifacetted description, focusing on the period from Fraunhofer up to the beginning of Bohr's quantum theory. A great deal of new and fascinating material from two dozen archives has been included. A must for anyone interested in the history of modern science or in research practice using visual representations.

Index of Spectra

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Author :
Release : 1889
Genre : Spectrum analysis
Kind : eBook
Book Rating : /5 ( reviews)

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Book Synopsis Index of Spectra by : William Marshall Watts

Download or read book Index of Spectra written by William Marshall Watts. This book was released on 1889. Available in PDF, EPUB and Kindle. Book excerpt:

Spectrum Geography, Grade 4

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Author :
Release : 2015-01-05
Genre : Juvenile Nonfiction
Kind : eBook
Book Rating : 010/5 ( reviews)

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Book Synopsis Spectrum Geography, Grade 4 by : Spectrum

Download or read book Spectrum Geography, Grade 4 written by Spectrum. This book was released on 2015-01-05. Available in PDF, EPUB and Kindle. Book excerpt: Winding through purple mountains majesties and amber waves of grain, the standards-based Spectrum Geography: Regions of the U.S.A. for grade 4 guides your childÕs understanding of maps, regions, canals, tributaries, and more using colorful illustrations and informational text. --Spectrum Geography is an engaging geography resource that goes beyond land formations and mapsÑit opens up childrenÕs perspectives through local, national, and global adventures without leaving their seats.

Towards Cloud-based Crowd-augmented Spectrum Mapping for Dynamic Spectrum Access

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Author :
Release : 2015
Genre : Electronic dissertations
Kind : eBook
Book Rating : /5 ( reviews)

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Book Synopsis Towards Cloud-based Crowd-augmented Spectrum Mapping for Dynamic Spectrum Access by : Prabhu Janakaraj

Download or read book Towards Cloud-based Crowd-augmented Spectrum Mapping for Dynamic Spectrum Access written by Prabhu Janakaraj. This book was released on 2015. Available in PDF, EPUB and Kindle. Book excerpt: In recent years, applications using wireless technology has dramatically increased. This has led to the challenge of improving the spatio-temporal spectrum utilization. Dynamic spectrum access is a method of opportunistically accessing the spectrum. Identifying the unused spectrum is one of the key challenge for dynamic spectrum access. Regulatory bodies recommend the usage of centralized database to maintain the unused spectrum at various geographic locations. These databases are constructed with the help of propagation models. Propagation models are not accurate enough for effcient spectrum utilization. To encounter this problem, we propose a cloud-based and crowd- augmented spectrum mapping database by combining the manual spectrum measurements from various mobile devices. Then, we show how optimal sampling can help in achieving high resolution, high accurate spectrum mapping in minimal cost.

Spectrum Geography, Grade 3

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Author :
Release : 2015-01-05
Genre : Juvenile Nonfiction
Kind : eBook
Book Rating : 446/5 ( reviews)

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Book Synopsis Spectrum Geography, Grade 3 by :

Download or read book Spectrum Geography, Grade 3 written by . This book was released on 2015-01-05. Available in PDF, EPUB and Kindle. Book excerpt: Winding through purple mountains majesties and amber waves of grain, the standards-based Spectrum Geography: Communities for grade 3 guides your child’s understanding of landforms, oceans, rivers, communities, the environment, and more using colorful illustrations and informational text. Spectrum Geography is an engaging geography resource that goes beyond land formations and maps—it opens up children’s perspectives through local, national, and global adventures without leaving their seats.

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