893 resultados para Logic, Symbolic and mathematical
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From the Introduction. “We are a Convention. We are not an Intergovernmental Conference because we have not been given a mandate by Governments to negotiate on their behalf the solutions which we propose. We are not a Parliament because we are not elected by citizens to draft legislative texts. […] We are a Convention. What does this mean? A Convention is a group of men and women meeting for the sole purpose of preparing a joint proposal. […] It is a task modest in form but immense in content, for if it succeeds in accordance with our mandate, it will light up the future of Europe”.1 In his speech inaugurating the Convention process on 26 February 2002 in Brussels, Convention President VALÉRY GISCARD D’ESTAING raises three issues: first, he refers to the Convention’s nature and method; second, he talks of the Convention’s aim and output; and, third, he evokes the Convention’s historic and symbolic significance. All three aspects have been amply discussed in the past two years by politicians and academics analysing whether the Convention’s purpose and instruments differ fundamentally from those of previous reform rounds; whether the input into and output of the Convention process qualitatively improves European Treaty revision; and whether the Convention as an institution lived up to its symbolic and normative load, reflected in comparisons with “Philadelphia” or references to a “constitutional moment”.2
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This paper deals with sequences of random variables belonging to a fixed chaos of order q generated by a Poisson random measure on a Polish space. The problem is investigated whether convergence of the third and fourth moment of such a suitably normalized sequence to the third and fourth moment of a centred Gamma law implies convergence in distribution of the involved random variables. A positive answer is obtained for q = 2 and q = 4. The proof of this four moments theorem is based on a number of new estimates for contraction norms. Applications concern homogeneous sums and U-statistics on the Poisson space.
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A quantitative model of development of magmatic and ore-magmatic systems under crests of mid-ocean ridges is constructed. Correct physical models of melting zone formation in approximation to active spreading, non-stationary dynamics of magma intrusion from a center of generation, filling of magma chambers of various shapes, feeding of fissure-type volcanoes, and retrograde boiling of melts during solidification of intrusive bodies beneath axial zones of spreading in crests of ridges are proposed. Physicochemical and mathematical theories of disintegration of multi-component solutions, growth of liquational drops of ore melts, and sublimation of components from magmatic gases are elaborated. Methods for constructing physically correct models of heat and mass transfer in heterophase media are devised. Modeling of development of magmatic and ore-magmatic systems on the basis of the Usov-Kuznetsov facies method and the Pospelov system approach are advanced. For quantitative models numerical circuits are developed and numerical experiments are carried out.
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Vols. 13-62 consist of Research papers no. RP691-RP2961.
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Mode of access: Internet.
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Mode of access: Internet.
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(Vol. 8 translated by Willa and Edwin Muir.)
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Supplement to his Tracts physical and mathematical.
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Includes bibliographies.
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At head of title, v. 1-2: Department of commerce. Bureu of standards. George K. Burgess, director. -v. 3-12, U. S. Department of commerce ... Bureau of standards ... -v. 13- United States Department of commerce ... National bureau of standards ...
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"A portion of the following pages has already appeared in two articles contributed ... to the North British Review."--Pref.
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Monoclonal antibodies (Mab) are heterotetramers consisting of an equimolar ratio of heavy chain (HC) and light chain (LC) polypeptides. Accordingly, most recombinant Mab expression systems utilize an equimolar ratio of heavy chain (he) to light chain (lc) genes encoded on either one or two plasmids. However, there is no evidence to suggest that this gene ratio is optimal for stable or transient production of recombinant Mab. In this study we have determined the optimal ratio of hc:lc genes for production of a recombinant IgG(4) Mab, cB72.3, by Chinese hamster ovary (CHO) cells using both empirical and mathematical modeling approaches. Polyethyleneimine-mediated transient expression of cB72.3 at varying ratios of hc:lc genes encoded on separate plasmids yielded an optimal Mab titer at a hc:lc gene ratio of 3:2; a conclusion confirmed by separate mathematical modeling of the Mab folding and assembly process using transient expression data. On the basis of this information, we hypothesized that utilization of he genes at low hc:lc gene ratios is more efficient. To confirm this, cB72.3 Mab was transiently produced by CHO cells at constant he and varying lc gene dose. Under these conditions, Mab yield was increased with a concomitant increase in lc gene dose. To determine if the above findings also apply to stably transfected CHO cells producing recombinant Mab, we compared the intra- and extracellular ratios of HC and LC polypeptides for three GS-CHO cells lines transfected with a 1:1 ratio of hc:lc genes and selected for stable expression of the same recombinant Mab, cB72.3. Intra- and extracellular HC:LC polypeptide ratios ranged from 1:2 to 1:5, less than that observed on transient expression of the same Mab in parental CHO cells using the same vector. In conclusion, our data suggest that the optimal ratio of hc:lc genes used for transient and stable expression of Mab differ. In the case of the latter, we infer that optimal Mab production by stably transfected cells represents a compromise between HC abundance limiting productivity and the requirement for excess LC to render Mab folding and assembly more efficient.
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There is a substantial body of literature that suggests that clothing and more particularly fashion is a form of communication. It communicates how we want to be seen by others as well as how we see ourselves. But does it communicate how we feel? This paper draws a link between symbolic and emotional communication by suggesting that fashion changes our internal feelings and that many of these emotions are expressed to others through symbols such as the clothes we wear. A conceptual framework is presented explaining the effects of clothing on an individual consumer. This framework classifies the fashion effect into internally and externally communicated meanings. Knowledge of how fashion is used as a form of emotional expression is particularly important for those fashion retailers who display the clothing they sell to engender positive feelings that may then lead to purchase behaviour.
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Os produtos de luxo são capazes de transmitir significados sociais e individuais, bem como sua carga simbólica e emocional. Por meio desses produtos, é possível conhecer um pouco dos valores, crenças e atitudes das pessoas que os consomem. O número de pessoas com deficiência no Brasil chega a 45 milhões da população brasileira, e o mercado brasileiro voltado para pessoas com deficiência ainda é pouco explorado pelas empresas. Esse trabalho objetiva analisar os efeitos dos fatores antecedentes da atitude face aos bens de luxo entre pessoas portadoras de deficiência física e pessoas sem deficiência. A pesquisa fundamenta-se em uma abordagem de investigação quantitativa, onde os dados foram coletados por meio de um instrumento de pesquisa com a obtenção de 239 questionários respondidos, possibilitando a análise dos relacionamentos entre os construtos Status, Influência Social, Autoestima, Não funcionalidade sobre a Atitude Face aos Bens de Luxo. Para realizar os testes das hipóteses do estudo, foi realizada a análise de equações estruturais, com base no PLS-PM (Partial Least Squares Path Modeling), onde foram apresentadas medidas satisfatórias para os construtos investigados e o modelo proposto, sendo significantes algumas relações entre os construtos. O estudo concluiu que a percepção de status influencia positivamente a Atitude face ao luxo, pois os indivíduos buscam aumentar seu status através do consumo de bens de luxo. Concluiu-se também que a influência social e autoestima impactam positivamente a Atitude face aos bens de luxo. Não foram encontradas influências significantes da não funcionalidade com a atitude face ao luxo e, além disso, não foi confirmado que a autoestima influencia a percepção de status e de influência social. Os resultados evidenciam também que pessoas sem deficiência possuem maior percepção de Status se comparados com as pessoas com deficiência física. O grupo de pessoas com deficiência física tem maior percepção de Funcionalidade atribuída aos produtos e maior Autoestima se comparado com o grupo de pessoas sem deficiência. De acordo com os resultados, o impacto da Autoestima sobre a Atitude Face ao Luxo é moderado pelo porte de deficiência.