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Sampson, David; Interview and Materials
No full textRoster Number: 1211. Interview Location: Box 4 Folder 4
Introduction
No full textThis PDF file contains the front matter associated with SPIE Proceedings Volume 9710, including the Title Page, Copyright information, Table of Contents, and Conference Committee listing
Boron linkers and immobilised Boranes for solid phase chemistry
No full textThis thesis describes the synthesis and evaluation of two linkers designed for the immobilisation of boronic acids onto the solid phase. Solution hydroboration with catecholborane and derivatisation of the resultant boronate esters was carried out. A linker with a catechol functionality was synthesised and attached to the solid phase. Initial attempts to couple this linker resulted in aminomethyl resin, but the coupling was subsequently achieved in good yield. Conversion of this linker to a solid supported catecholborane and subsequent solid phase hydroboration was attempted. A solid supported boronate was also synthesised by the condensation of the catechol resin and a boronic acid. A linker with a 1,2-diol functionality was synthesised on the solid phase. Conversion of this linker to the pinacol-type-borane and subsequent hydroboration was attempted. A number of boronic acids were coupled to the glycol resin by condensation. Solution hydrocarbon with catecholborane yielded a number of catecholboronate esters that were coupled to the glycol resin by transesterification. The resin bound boronates were cleaved from the resin by an electrophilic oxidative method to yield boronic acids, a nucleophilic oxidative method to give phenols, an aldehyde, an alcohol and a ketone and Suzuki couplings which led to a biphenyl.</p
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
Non-nucleophilic base (KHMDS) mediated nucleophilic conversion of Merrifield resin into aminomethyl resin
No full textDuring a series of alkylation reactions on Merrifield resin involving a number of alkoxides, generated in situ by the treatment of alcohols with a variety of bases (NaH, LiHMDS, etc.), it was determined that treatment of the resin with a number of hexamethyldisilazide bases gave rise to high yields of aminomethyl resin, presumably by nucleophilic displacement of the chloride. The reaction was optimised as a simple one-step process for the generation of aminomethyl resin from chloromethyl polystyrene. The resulting resin was used to synthesise a tripeptide
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
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