Journal of Electromagnetic Waves and Applications

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The Astrolabe

An ancient instrument for solving problems of location and distance, as well as time

Astrolábon órganon is the word used in Ptolemaeus Syntaxis 5.1 to describe a form of armillary sphere consisting of both fixed and rotating rings for determining the ecliptic co-ordinates of stars. Also called astrolabe were two-dimensional representations of the celestial sphere: over fixed disks with a representation of the horizon of the earth (in each case for a specific geographic latitude) and its parallels up to the zenith lies a rotating representation of the heavens (called ‘spider’ or ‘net’) with zodiac and indicators for some of the brightest stars. On the back is an indicator (‘alidade’) with visor plates for calculating the height of the stars. The astrolabe allows its user to determine the hours of day and night, the positions of stars, and the height and depth of objects on earth (mountains, buildings, wells). The oldest extant descriptions of the flat, planispheric astrolabe come from Iohannes Philoponus, 6th century AD, and (in Syrian) from Severus Sebokht, c. 660 AD. Indirect references may date back as early as Theon (4th cent.). Between the 8th and the 9th centuries the Arabs appropriated the knowledge of the astrolabe. At the end of the 10th century and again in the 12th century, they passed it on to Western Europe, where astrolabes were constructed up until the 17th cent. Today, one Byzantine astrolabe (from 1062) is extant, as are some 750 Arabic-Islamic astrolabes and approximately the same number of European astrolabes.

This information is abstracted from Brill's New Pauly, the English edition of the authoritative Der Neue Pauly, Encyclopaedia of the Ancient World. The encyclopaedic coverage and high academic standard of the work, the interdisciplinary and contemporary approach and clear and accessible presentation have made the New Pauly the unrivalled modern reference work for the ancient world. For more information see www.brillsnewpauly.com or visit our website catalog: www.brill.nl/bnp
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Journal of Electromagnetic Waves and Applications

Editor-in-Chief: W.C. Chew (Hong-Kong, China). Founding Editor-in-Chief: J.A. Kong † (Cambridge, MA, USA)

Journals


ISSN:	0920-5071
E-ISSN:	1569-3937

Current:	Volume 23 (2009)
Number of Issues:	18
List price Institutions:	€ 2825.00 / US$ 4153.00
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Editorial Board

Deputy Editors-in-Chief: Qing-Huo Liu Kwai-Man Luk Editorial Board: Matteo Albani Steven Best Anjan Biswas Henning Braunisch Che-Ting Chan Kwok-Tong Chau Hongsheng Chen Zhi-Ning Chen Dajun Cheng Chung-Kwang Chou Robert Collin Tie-Jun Cui Wen-Bin Dou George Eleftheriades Atef Z. Elsherbeni Hyo-Joon Eom Levent Gurel Tarek Habashy Susan Hagness Roger Harrington Randy L. Haupt Bo He Sai-Ling He Akira Ishimaru Koichi Ito Shih-Kang Jeng Jian-Ming Jin Rafi Kastner Che-Young Kim Ahmed Kishk Jay Kyoon Lee Kai-Fong Lee Kun-Chou Lee Dominique Lesselier Le-Wei Li Hao Ling Qing-Huo Liu Cai-Cheng Lu Kwai-Man Luk Samir F. Mahmoud Seiji Mano Mahta Moghaddam Juan Mosig Zai-Ping Nie Alain Priou Li-Xin Ran Yahya Rahmat-Samii Juan A. M. Rojas Edward J. Rothwell Tapan K. Sarkar Edl Schamiloglu Waymond Scott Ari H. Sihvola Ji-Ming Song Johan C.-E. Sten Mei-Song Tong Sergei A. Tretyakov Leung Tsang Nikolaos K. Uzunoglu John L. Volakis Ping-Kong Wai Karl Warnick Dan Weile Bae-Ian Wu Ruey-Beei Wu Ganquan Xie Arthur D. Yaghjian Alexander Yarovoy Wen-Yan Yin Ming Zhang Wen-Xun Zhang Yue-Ping Zhang

Abstracting & Indexing

Bibliography and Index of Geology Contents of Contemporary Mathematical Journals (now: Current Mathematical Publications) Current Contents Engineering Index Monthly Inspec Database Mathematical Reviews MathSciNet Research Alert (Philadelphia) SCOPUS Speleological Abstracts

Back Volumes

Journal of Electromagnetic Waves and Applications, Volume 21 (2007)

Journal of Electromagnetic Waves and Applications, Volume 22 (2008)

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This journal covers all aspects of electromagnetic wave theory and its various applications. The journal publishes original papers and review articles on new theories, methodology and computational techniques, and interpretations of both theoretical and experimental results. The aim is to report advancement and progress in the modern development of electromagnetic wave theory and to report new and exciting applications. The journal's scope is broad and includes the following topics: Wave propagation theory; Remote sensing; Inverse scattering; Geophysical subsurface probing, inversion techniques; Propagation in random media; Oceanography-radar reflection; Meteorology; Ionospheric effects on wave propagation; Ionospheric modifications and heating; Atmospherics; Antenna theory and applications; Transients; Radar measurements and applications; Active experiments using space vehicles; Extra-terrestrial remote sensing; Electromagnetic interferometry; Ground-based remote sensing; Agricultural remote sensing; Microelectronic, integrated circuits; EM wave transmission in VLSI; Electromagnetic pulse transmission and coupling; Electromagnetic compatibility; Optical and millimeter wave techniques; Integrated optics; Fiber optics; Communication systems; Solid state devices and circuits; Medical applications, biological effects; Ferrite devices; Field and network theory; High power devices and systems; Submicron structures; Waves in composite and amorphous materials; Expert systems in remote sensing; Numerical methods.

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Journal of Electromagnetic Waves and Applications