1,721,812 research outputs found
Novel chiral cyclopentadienyl metal complexes
No full textThe synthesis of the known two-carbon linked chiral indenyl-phosphine ligand (1S)-[2-3H-inden-1-yl)-1-phenylethyl]diphenyl-phosphine 59 has been repeated, and the unexpected rearrangement during the final step of its synthesis, involving the spirocyclic intermediate (R,R)-spiro[2-phenylcyclopropane)-1,1’-indene], has been investigated. The novel two-carbon linked chiral ligand [(2R)-2-cyclohexyl-2-(3H-inden-1-yl)ethyl]-diphenylphosphine 121, has been prepared and its synthesis optimised to provide 61 % yield of enantiopure 121 from commercial vinylcyclohexane. The lithium salt of 121 has been complexed with [Rh(μ-C1)(CO)2]2 to form its rhodium(I) complex 154, with 56 % d.e. induction of planar-chirality. Complexation of 121 with RuC12(PPh3)3 has also been achieved, and the resulting ruthenium(II) complex 147 formed with 60 % d.e. induction of planar-chirality and complete control of metal-centred chirality. Unfortunately initial catalytic trials of the ruthenium(II) complex have proved disappointing. The ruthenium complex has been hydrogenated to the tetrahydroindenyl complex 148. The novel diphenyl-substituted two-carbon linked ligand rac-[1,2-diphenyl-2-(3H-inden-1-yl)ethyl]diphenyl-phosphine 128 has been prepared and complexed with RuC12(PPh3)3 to form its ruthenium complex 149, with 74 % d.e. induction of planar-chirality. The novel three-carbon linked indene-phosphine ligand rac-[3-cyclohexyl-3-(3H-inden-1-yl)propyl]-diphenyl-phosphine 129 has been prepared in 36 % overall yield from malonic acid and cyclohexane carboxaldehyde via a synthetic route involving the 1,4-addition of indenyl lithium to an α,β-unsaturated ester. X-ray structures six of the above organometallic complexes have been obtained, as well as five X-ray structures of intermediates formed during the syntheses of their ligands.</p
Re-fighting the Battle of Down: Orpen, MacNeill and the Irish nation-state
No full textNo abstract available
Achilles and the improba virgo. Ovid, Ars am. 1.681-704 and Statius, "Ach." 1.491-552
No full textAnalysis of the modelling influence of Ovid's apostrophai to Achilles in cross-dress at Scyros (Ars am. 1.681-704) on Statius' Achilleid 1.619-639 (Achilles' dialogue with himself in the night he rapes Deidameia) and 1.514-535 (apostrophai to Thetis and Achilles by Calchas, who is asked by the Greeks at Aulis to divine where Achilles is hidden).
Calchas' speech may be read as a more dignified, epic retelling of Ovid's narrative, which had presented the didactic author (mockingly, of course) as the positive influence that ensured Achilles would adhere to his twin destiny as martial hero & great lover. Statius‘ Calchas has the same tone of indignation over the destiny of the character Achilles as Ovid did in the Ars. Like the Ovidian narrator, he also serves as the catalyst that advances the plot towards Achilles' definitive liberation from cross-dressing, in that he provides Odysseus and Diomedes with the necessary information to summon the hidden hero to the war. Calchas‘ assuming this role is well within the limits of the poetics of epic, since his Iliadic alter ego had similarly compelled Agamemnon to radically change his attitude toward Chryseis and thus redirected the story of the war of Troy. Later in my paper, we will see how Statius' re-dignified Achilles follows, in a way, in Calchas‘ and Ovid's footsteps by showing the same indignation and addressing comparable apostrophai to himself (1.619-639) as he himself acknowledges the necessity of stopping his transvestism even before Calchas‘ stand-in Odysseus compelled him to give it up.
The paper concludes with an Ovidian interpretation of the expression improba virgo, with which Statius’ Calchas labels Deidameia (1.535)
Tree registration in the Philippines: a governance perspective
Full text linkThis paper introduces the concept of ‘governance’ in relation to smallholder forestry, and examines governance issues concerning tree registration and harvest and transport approval in the Philippines. The difficulties faced in relation to tree registration by the various stakeholder groups – particularly the DENR and smallholders – are examined, and potential regulatory reforms reviewed. It is concluded that there is scope for improvements in tree registration and related regulations, but there are strong impediments to change
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
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