1,721,055 research outputs found
Atlas of Astronomical Discoveries
No full textFour hundred years ago in Middelburg, in the Netherlands, the telescope was invented. The invention unleashed a revolution in the exploration of the universe. Galileo Galilei discovered mountains on the Moon, spots on the Sun, and moons around Jupiter. Christiaan Huygens saw details on Mars and rings around Saturn. William Herschel discovered a new planet and mapped binary stars and nebulae. Other astronomers determined the distances to stars, unraveled the structure of the Milky Way, and discovered the expansion of the universe. And, as telescopes became bigger and more powerful, astronomers delved deeper into the mysteries of the cosmos. In his Atlas of Astronomical Discoveries, astronomy journalist Govert Schilling tells the story of 400 years of telescopic astronomy. He looks at the 100 most important discoveries since the invention of the telescope. In his direct and accessible style, the author takes his readers on an exciting journey encompassing the highlights of four centuries of astronomy. Spectacular photographs, taken with the largest telescopes on Earth and in space, portray the most distant corners of the universe. "Selecting and describing the hundred most impressive and important astronomical discoveries is no easy task, but no one can master this feat as well as Govert Schilling, a veritable master of science communication. With captivating words and breathtaking images, the Atlas of Astronomical Discoveries is a tour-de-force of humankind’s almost unbelievable progress in understanding the cosmos over the past 400 years." Lars Lindberg Christensen, Head of ESO’s Education and Public Outreach Department and author of Cosmic Collisions (Springer 2009) "A hyper modern concept, aimed at the multimedia generation." Sjaak Priester, science reporter in Dutch newspaper "De Volkskrant" "A non plus ultra of astronomical history with breathtaking photography." Peter Reinhard, practical astronomer in Austrian magazine "Die Sternenrundschau
The elephant in the universe: our hundred-year search for dark matter/ Govert Schilling
No full textIncludes bibliographical references and index"If existing models of the structure of the universe are correct, then 85 percent of the cosmos comprises a substance called dark matter. Yet no direct evidence of dark matter exists. Award-winning science journalist Govert Schilling details the quest to detect dark matter and how the search has helped us to understand the universe we inhabit"--1 online resource (vi, 364 pages
Book Review: Flash!: The Hunt for the Biggest Explosions in the Universe
Get PDFThis document is Dr. Oswalt’s review of Flash! : the hunt for the biggest explosions in the universe by Govert Schilling. tr. by Naomi Greenberg-Slovin Cambridge, 2002 291p, 0-521-80053-6 $28.0
Juhlavuoden juhlakirjat
Get PDFGovert Schilling ja Lars Lindberg Christensen: Katse taivaalle – 400 vuotta kaukoputken historiaa.
Suomennos Leena Tähtinen. Ursa 2008.
Lars Lindberg Christensen, Robert Fosbury ja Robert Hurt:
Kätketty maailmankaikkeus. Suomennos Hannu Karttunen.
Ursa 2008
GALEX and UV Observations
No full textIn his article “Ultraviolet astronomers face loss of vision” (News Focus, 25 June, p. 1899), Govert Schilling makes the important point that we will soon lose our view of the ultraviolet (UV) sky unless we preserve or replace the few existing UV space missions
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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