1,721,031 research outputs found
3Q Lisa Randall
No full textParlem amb Lisa Randall sobre la matèria fosca i com aquest concepte es pot divulgar entre no científics. Randall és especialista en física de partícules i cosmologia i una pensadora marcadament transversal que ha sabut relacionar els coneixements del seu camp amb els de la filosofia, les humanitats i la música. Randall va esdevenir la primera dona catedràtica del Departament de Física Teòrica de la Universitat de Princeton i de la Universitat de Harvard. Ha treballat diversos models de la teoria de cordes per explicar el funcionament de l'Univers i la seva recerca va donar lloc a les primeres indicacions de que la partícula de Higgs era imprescindible per a la teoria de partícules elementals, molt abans que es descobrís experimentalment. És membre del comitè científic extern de l'IFAE i col·laboradora habitual de la seva divisió teòrica i del Departament de Física de la UAB
Dark Matter and the Dinosaurs: An Evening with Dr. Lisa Randall [Video]
No full textDr. Lisa Randall is a world-renowned theoretical physicist, best-selling author, and the Frank J. Baird, Jr. Professor of Science at Harvard University, where she researches and teaches theoretical particle physics and cosmology. Her most recent book, Dark Matter and the Dinosaurs: The Astounding Interconnectedness of the Universe (2015) received critical praise from far and wide, continuing a string of bestselling science books of the highest caliber. One esteemed fellow physicist hailed the book as “a masterpiece of science writing: a detective story that illuminates the nature of scientific research while explaining how our very existence may be connected to unexpected properties of the dark matter that fills the universe.”
Dr. Randall’s research connects theoretical insights to puzzles in our current understanding of the properties and interactions of matter. She has developed and studied a wide variety of models to address these questions, the most prominent involving extra dimensions of space. Her work has involved improving our under-standing of the Standard Model of particle physics, supersymmetry, baryogenesis, cosmological inflation, and dark matter. Randall’s research also explores ways to experimentally test and verify ideas and her current research focuses in large part on the Large Hadron Collider and dark matter searches and models.
7th Annual Bruce MacLaren Distinguished Lecture.
Part of the Chautauqua Lecture Series: Order and Chaos (2016-2017)
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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