1,721,596 research outputs found
Situational awareness for a navy UUW
No full textThesis (S.M.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2003.Includes bibliographical references (p. 131-132).by Andrew Peter Mierisch.S.M
1999 Young Building Renovation event - Andrew Peter (MLA, Minister of Advanded Education, Traning and Technology) and Liz Ashton
No full text1999 Young Building Renovation event - Andrew Peter (MLA, Minister of Advanded Education, Traning and Technology) and Liz Ashton (President of Camosun
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
Molecular theories and computer simulations of liquid crystals
No full textWe have adopted two quite different approaches for the investigation of the properties of liquid-crystalline systems: molecular theories and computer simulations. In the first part of this thesis we describe the development of a molecular field theory for calculating the thermodynamic properties of liquid crystals containing flexible chains. The application of this theory to a variety of flexible model mesogens is discussed and the results compared with experimental data. In an attempt to rectify the deficiencies in this model we present an alternative parameterisation of the molecular field theory based on the molecular moment of inertia tensor. The predictions of this new parameterisation are compared with those of the previous approach and thermodynamic data obtained from experiment. The conformational probabilities calculated with the original theory are employed in an investigation into possible visual representations for flexible mesogens. Techniques involving fixed and conformational dependent reference frames are explored and the results analysed with the aid of computer graphics. The possible relationships between the graphics images and order parameters determined from NMR spectroscopy are discussed. In the second part of this thesis we present molecular dynamics simulations of particles in the microcanonical ensemble interacting via a single-site anisotropic potential which has been parameterised to model both rod-like and disc-like mesogens. The phase behaviour together with the static and dynamic properties of these systems are discussed and compared with results of other simulations of liquid crystals and experiment.</p
Transition metal electrochemistry in aromatic solvents
No full textThis thesis describes a new type of solvent for electrochemistry. The use of polyaromatic hydrocarbons as solvents is demonstrated in the field of metal deposition, where the electroplating of several transition metals are shown as examples. Ideas for dissolving such metallic species in aprotic solvent of low dielectric constant are also discussed. The first part of this work is concerned with the characterisation of this type of solvent, in terms of the conductivity and solubility of various tetra-alkylammonium salts. A simple method for predicting the solubilities by measuring the u.v. absorbtion spectra of a dye in these solvents is demonstrated. The theory of conductivity in low dielectic constant solvents is also discussed in terms of ion pair and triple ion formation. Data is analysed using a modified Fuoss-Kraus theory which takes the activity coefficient of the undissociated electrolyte into account. The second part of this thesis discusses the suitability of this type of solvent to metal deposition, and the difficulties associated with the deposition of certain of the more reactive transition metals. The plating of some simple alloys is also shown. The role of the ligand and the oxidation state at which the transition metal is first introduced into the solvent is discussed.</p
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
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