1,721,052 research outputs found
Unlocking the Universe's Secrets with James Webb Space Telescope (Free Astronomy Public Lectures)
No full textThis is a special State of the Universe lecture for National Science Week in August 2022. Presented by the Centre for Astrophysics and Supercomputing (CAS) at Swinburne University of Technology.
Successfully launched on 25 December 2021, NASA’s successor to the Hubble Space Telescope, the James Webb Space Telescope (JWST) has taken its first images and will be released to the public 12 July. Join Professor Karl Glazebrook, Dr Themiya Nanayakkara and Dr Colin Jacobs, as they discuss these images and the potential secrets of the universe they reveal. Dr Nicha Leethochawalit from University of Melbourne will share her work on redshifted galaxies (z=10). Presented 19 August 2022
The rocket science in everyday life in your backyard (Free Astronomy Public Lectures)
No full textOver the last century, our understanding of the Universe has grown by leaps and bounds whilst posing new questions and testing our very fundamental knowledge and understanding of things around us. To answer these profound questions, scientists are planning ever more ambitious projects driven by human curiosity, to explore the unknown and comprehend our place in the vast senseless space. The Australian federal government in 2016-17 provided AUD 10 billion in support of science research and experiment development while NASA and ESA combined, plans to invest USD 25+ billion in 2017. Why is it important for governments to spend substantial amounts of money in fundamental science research? What are the benefits for the average tax payer, from governments investing billions of dollars into space science? How has our everyday lives been influenced by such investments? Together we shall discuss and explore how our investments in science has improved our way of living, and what the future may hold in store for us. Presented on 21st April 2017
Local Universe as a benchmark to stellar populations in the epoch of reionisation
Full text linkLarge scale structure and cosmolog
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe 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
MOSFIRE spectroscopy of galaxies in cosmic noon
No full textThis thesis make use of a recently commissioned spectrograph in one of the largest optical telescopes in the world to study galaxies that existed 10 billion years ago. The universe was only 3 billion years old at that time, and galaxies in that epoch were undergoing rapid evolution forming stars with high efficiency to form most of the present day observed matter. Using this data, we try to understand how galaxies like ours evolve from our old ancestors and how properties such as the mass of a galaxy and the environment in which it resides can affect the evolution
Variations on the Author
Full text link“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
Full text linkWe 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
Full text linkWe 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
- …
