1,723,293 research outputs found
Abbott, D E, 2786017
No full textThis record was harvested from a previous catalogue system and will be withdrawn in 2025. Information in this record may be superseded or incomplete. Visit this record in UMA's new catalogue at: https://archives.library.unimelb.edu.au/nodes/view/367691Surname: ABBOTT
Given Name(s) or Initials: D E
Military Service Number or Last Known Location: 2786017
Missing, Wounded and Prisoner of War Enquiry Card Index Number: SEA-3027177738
Item: [2016.0049.00023] "Abbott, D E, 2786017
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
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
A MEMS implementation of a Brownian Ratchet
No full textBrownian Ratchet is a device that can rectify the random Brownianmotion of particles to yield a directed steady-state flow.We can imagine a thermo-fluid field of particles whichinteract with the ratchet. The laws of thermodynamics imply that theratchet must use energy from some other source.The dynamics of continuous-time Brownian ratchets are determined by astochastic partial differential equation. We have used a simplifieddiscrete-time model of a Brownian ratchet called ``Parrondo's games''which are governed by a difference equation. In their original form,Parrondo's games are a finite set of simple games of chance. Anindefinite pure sequence of any single game is neutral or evenlosing. A periodic or randomised sequence of mixed games can bewinning. There is a steady state flow of probability in the preferreddirection.We have been able to design a feasible and consistent device, bymapping the conservation law of total probability onto the law ofconservation of charge. This device can absorb energy from amechanical field to produce a directed flow of charge. The fundamentalarchitecture is based on a ``bucket-brigade'' device. The capacitorsare 2-port MEMS devices. We use CMOS transmission gates to connect thecapacitors in the required topology.We present an analysis and simulation of the MEMS Brownian ratchet andsuggest some possible applications.Andrew G. Allison and Derek Abbot
Solid state quantum computers: A nanoscopic solution to the Moore's Law problem
No full textThe computer industry has followed Moore's Law closely and faithfully over the past few decades. However, transistors cannot continue to shrink at their current rate forever, and new methods of computation must be explored. Quantum computation is one such method that has received much attention over the past few years and will heavily rely on technological advances in the smart electronics and nanotechnology arena. In this review, we will present some of the problems facing classical computers and why quantum computers may be a viable alternative. We will briefly describe some of the "killer" quantum applications, such as Deutsch's, Shor's and Grover's algorithms that demonstrate the computational powers of quantum computation. Kane's solid state quantum computer in silicon promises to demonstrate some of these applications. However there remain many significant technological difficulties which will need to be overcome if we are to see a useful quantum computer. The main technological challenges, for Kane's solid-state computer, of interest to the smart materials and structures community, will be highlighted.Joseph Ng and Derek Abbot
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