754 research outputs found
Reticulated vitreous carbon as an electrode material
No full textAn illustrated review of reticulated vitreous carbon (RVC) as an electrode material is presented. Early uses of RVC were largely restricted to small-scale (<1 cm3) electroanalytical studies in research laboratories. RVC properties of a high ratio of surface area to volume and minimal reactivity over a wide range of process conditions, combined with low cost and easy handling, have resulted in a steady diversification of its applications both in research laboratories and in industry. The physical structure of RVC (in terms of pores per linear inch, strut length, strut thickness and area of the trigonal strut) is examined for 10, 30, 60 and 100 ppi (pores per linear inch) grades using scanning electron microscopy. The accurate measurement of these geometrical values presents both theoretical (in terms of definition of trigonal strut area, beginning and end of single strand) and practical problems (large differences in strut length and thickness in individual samples). Data are presented to show the relationships between geometrical properties. Applications include electroanalytical studies and sensors, metal ion removal, synthesis of organics and Fenton s reagent, H2O2 production and batteries/fuel cells
Fourth Annual Thaddeus C. Reade Lecture Series and Pastors\u27 Conference
No full textThe fourth annual Thaddeus C. Reade Lecture Series, combined with the annual Pastors\u27 Conference will be held at Taylor University Thursday, February 4. The Reade Lecturer will be Dr. A.W. Tozer, noted author an lecturer
Joseph B. Reade (1801–1870) and the earliest studies of fossil dinoflagellate cysts in England
No full textAbstract. The earliest British record of fossil dinoflagellate cysts is shown to have been published in 1838, in an appendix to Mantell’s The Wonders of Geology. A biography of its author, the Reverend Joseph Bancroft Reade (1801–1870), is presented; it is shown that his discoveries resulted from an awareness of earlier work in Germany and France. Reade is shown, not only to have stimulated Mantell’s interest in these microfossils, but also to have perceived their potential value as biostratigraphical indices. The present taxonomic placement of the forms illustrated by Reade in the 1838 note, and in his better-known paper published later in the same year, is summarized.
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Jusqu’où faut-il aller trop loin : Charles Reade, une esthétique de l’excès
No full textCharles Reade, the novelist (1814-1884), has lain in purgatory for more than one century, apparently because of his taste for excess. Rehabilitation is still to come for the author of It Is Never Too Late to Mend (1856), The Cloister and the Hearth (1861) or Hard Cash (1863), the three works which are studied in this paper. Reade never knew how to check his productivity, as exemplified by the constant recycling of his own texts and others’, his desire to shock the Victorian public with bloody episodes, or his decision to leave nothing unsaid, at the risk of crushing his readers under an excessive mass of words
Shape theory and mathematical design of a general geometric kernel through regular stratified objects
No full textThis thesis was submitted for the degree of Doctor of Philosophy and awarded by Brunel University.This dissertation focuses on the mathematical design of a unified shape kernel for geometric computing, with possible applications to computer aided design (CAM) and manufacturing (CAM), solid geometric modelling, free-form modelling of curves and surfaces, feature-based modelling, finite element meshing, computer animation, etc.
The generality of such a unified shape kernel grounds on a shape theory for objects in some Euclidean space. Shape does not mean herein only geometry as usual in geometric modelling, but has been extended to other contexts, e. g. topology, homotopy, convexity theory, etc. This shape theory has enabled to make a shape analysis of the current geometric kernels. Significant deficiencies have been then identified in how these geometric kernels represent shapes from different applications.
This thesis concludes that it is possible to construct a general shape kernel capable of representing and manipulating general specifications of shape for objects even in higher-dimensional Euclidean spaces, regardless whether such objects are implicitly or parametrically defined, they have ‘incomplete boundaries’ or not, they are structured with more or less detail or subcomplexes, which design sequence has been followed in a modelling session, etc. For this end, the basic constituents of such a general geometric kernel, say a combinatorial data structure and respective Euler operators for n-dimensional regular stratified objects, have been introduced and discussed
Charles Reade, dramatist, novelist, journalist. A memoir compiled chiefly from his literary remains,
No full textMode of access: Internet
Reade Papers: General Correspondence (D), 1938-46; Box 19, Folder 4
No full textVarious business and personal correspondents. Of note is a letter regarding the naming of Drexel Park
Margarita de la Ó. / novela escrita en inglés por Carlos Reade ; traducida al español por F. Ramírez.
No full text191 p.
Ecologia da polinização do mirtilo (Vaccinium ashei Reade cvs. Climax e Powderblue) no município de Bom Retiro, SC
No full textDissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Ciências Agrárias, Programa de Pós-Graduação em Recursos Genéticos Vegetais, Florianópolis, 2010A introdução de novas espécies e cultivares de plantas frutíferas de clima temperado no Brasil, em especial no Estado de Santa Catarina, vem crescendo em área cultivada e conseqüentemente em importância econômica. O mirtilo (Vaccinium ashei Reade) (Ericaceae) é uma espécie introduzida comercialmente em Santa Catarina e no Brasil há relativamente pouco tempo e, para uma produção comercial satisfatória, necessita que pelo menos 80% das flores frutifiquem. Objetivou-se neste trabalho elucidar alguns aspectos da ecologia da polinização de Vaccinium ashei cvs Climax e Powderblue, por meio da realização de testes de polinização, da análise da produção quantitativa e qualitativa de néctar e a sua coleta pelos polinizadores, da contagem do número de grãos de pólen produzidos por flor e do levantamento da diversidade e abundância dos visitantes florais em uma área de cultivo comercial situada no município de Bom Retiro - SC, bem como da análise do comportamento forrageiro dos principais visitantes florais do mirtilo. Observou-se Os resultados obtidos neste estudo mostram que as cultivares Climax e Powderblue possuem flores com morfologia floral adaptada a polinização por abelhas. Ambas mostraram ser uma importante fonte de recursos tróficos (néctar e pólen) para as abelhas, o beija flor e os demais visitantes florais. Apis mellifera foi considerada o polinizador efetivo de ambas as cultivares. As abelhas Plebeia spp., Bombus pauloensis, Melipona sp., Xylocopa spp. e as da família Halictidae, além do beija flor Leucochloris albicolis podem ser considerados potenciais polinizadores. Observou-se a ocorrência de autopolinização, entretanto, esta, sendo inadequada a produção comercial. A maior formação de frutos em condições naturais de flores sem dano na corola indica que os polinizadores de 'Climax' e 'Powderblue' são eficientes e garantem a formação de mais frutos, frutos mais pesados e de maior diâmetro em relação às flores com dano na corola, ficando assim caracterizados os efeitos negativos do dano provocado por Trigona spinipes para a produção destes frutos. Adicionalmente, os experimentos evidenciaram que a população natural de abelhas no pomar e seus arredores foi bem preservada uma vez que a polinização livre produziu uma carga de frutos superior e com melhor qualidade do que os experimentos com polinização cruzada controlada manualmente
Copper deposition at segmented, reticulated vitreous carbon cathode in hull cell
No full textThe electrodeposition of copper from an acid sulphate solution has been studied in a Hull cell fitted with four types of cathode; a carbon plate or a reticulated vitreous carbon (RVC) sheet was used either in a continuous or segmented form. The rates of mass transport to the planar plate and RVC electrodes have been compared in static and stirred electrolytes containing 50, 75 and100 mmol dm23 CuSO4 in 0?5 mol dm23 Na2SO4 at pH 2 and 298 K. The cathodes were divided into 10 equal sections and current vs. potential curves were obtained for each section at a constant current up to 140 mA. The current distribution over the cathodes followed a logarithmicdecay with distance along the cathode; segments nearest to the anode experienced the highest rate of copper deposition
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