On the bound-state spectrum of a nonrelativistic particle in the background of a short-ranged linear potential

The nonrelativistic problem of a particle immersed in a triangular potential well, set forth by N. A. Rao and B. A. Kagali, is revised. It is shown that these researchers misunderstood the full meaning of the potential and obtained a wrong quantization condition. By exploring the space inversion symmetry, this work presents the correct solution to this problem with potential applications in electronics in a simple and transparent way. © Electronic Journal of Theoretical Physics. All rights reserved.

Cytogenetic evidence for de novo synthesis of rRNA and involvement of nucleolar material in the organization of cell structures during spermiogenesis of Chariesterus armatus (Heteroptera, Coreidae).

The nucleolar material of Chariesterus armatus was analyzed during spermiogenesis in cell preparations impregnated with silver nitrate. Nucleolar corpuscles were observed in spermatids at the beginning of the process, showing that this organoid is also maintained after meiosis. In addition, nucleoli were seen in the round spermatids connected to the X-chromosome (bearer of the nucleolar organizer in C. armatus), indicating de novo synthesis of nucleolar material. This differs from the reorganization of ribosomal granules, transported from meiotic spermatocytes to round spermatids, where they would support protein synthesis, which is reported for other species. We also observed connections of nucleolar corpuscles to the nuclear membrane regions where the tail and the acrosome will be formed, suggesting close involvement of the nucleolar material in the formation of these structures. In addition to the nucleolar bodies, we detected silver-positive structures, which will require new approaches to clarify their role. One of these structures, observed in the cytoplasm, appears to correspond to the chromatoid body, which has been found in several organisms, but is still poorly understood; another is a complex structure to which the tail appears to be connected. We conclude that C. armatus is an appropriate model for understanding not only the synthesis of rRNA in the spermiogenesis, but also the functional meaning of the close relationship of nucleolar material with other structures during this process.

Optimization of algorithm to identification of duplicate tuples through similarity phonetic based on multithreading

Aiming to ensure greater reliability and consistency of data stored in the database, the data cleaning stage is set early in the process of Knowledge Discovery in Databases (KDD) and is responsible for eliminating problems and adjust the data for the later stages, especially for the stage of data mining. Such problems occur in the instance level and schema, namely, missing values, null values, duplicate tuples, values outside the domain, among others. Several algorithms were developed to perform the cleaning step in databases, some of them were developed specifically to work with the phonetics of words, since a word can be written in different ways. Within this perspective, this work presents as original contribution an optimization of algorithm for the detection of duplicate tuples in databases through phonetic based on multithreading without the need for trained data, as well as an independent environment of language to be supported for this. © 2011 IEEE.

As letras como unidades históricas na construção do discurso

This paper proposes we grant graphemes - the constituents of words in situations of discursive constructions - the status of meaning carrying units, in much the same way Vigotski granted the phoneme such status in relation to the spoken word. This paper also seeks to analyze these units in singular manifestations in acts of appropriation of the written language, based on data created by a six-year-old child in a discursive situation. To perform this task, we also referred to Bakhtinian studies on the role of the other in our relation with language. Since the analysis indicated spelling approximations to records found in old Portuguese, historical grammar research of Portuguese was also used. The findings indicate the diversity of reference sources for letter selection by the child, according to its function in the composition of the word.

The Magic Toyshop: A narrativa imagética como processo de recriação

Because it belongs to a cultural practice, the adaptation of a novel into a feature film will always exist within a context and, for being subject to changes, corresponding modifications in the political sphere and even variations in the meaning of the story may occur. This seems to be precisely the result of the transformation of Angela Carter's second novel, The Magic Toyshop, into the homonymous film, directed by David Whealtey in 1987. Removed from the context of the book's production and publication, a crucial period of questioning about the importance of women in society and culture, the plot created by the English author in the sixties, rewritten two decades later, with the author herself as the script writer, seems to have acquired another meaning during this time. Although the film maintains the same plot of the novel, the political engagement visibly present in the narrative, namely Carter's critical stance about the model of patriarchal society, seems to lose its strength, highlighting now its fantastic character. Briefly discussing issues such as loyalty and betrayal of one gender to another, we seek in this paper to observe the film, based on the re-writers perspective, in other words, the prospects of both writer and director, as a process of rebuilding the story. In this dialogue, the script was also used as an intertext for a better understanding of this process.

Peircean semiotics and subject indexing: Contributions of speculative grammar and pure logic

The semiotics of C S. Peirce presents fundamental concepts to discover aspects of the indexing process, including representation and classes of signs. However, we still know little of its theoretical potential for subject indexing. We believe that the main difficulty in the proposals to understand the process of subject indexing based on Peircean semiotics stems from an incomplete interpretation of his semiotic system. This paper attempts to describe the contributions of Peircean semiotics to subject indexing. First, we analyze some of the concepts of the branches of semiotics, after which, we discuss strategies for conceptual approximation. Secondly, and aiming to raise the level of interlocution between the areas, we intend to argue that subject indexing is an inferential process, as explained by the second branch of semiotics. Thus, we seek to go beyond the level of speculative grammar, the first branch of semiotics, to forge a closer link with pure or critical logic, the second branch. We conclude that the indexer's work does not produce a mere reflection of what already exists in documents, but involves an instigating action to discover, through the inferential matrix, the meaning of a text in order to find the subject and the most appropriate subject added entry to the information system.

A caixa de Pandora: as deusas e o feminino no cinema

Pós-graduação em Artes - IA

O processo de intelecção em Pedro Abelardo

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Mídia impressa e leitor: uma leitura crítica e polissêmica

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Conselho de escola: espaço de limites e possibilidades na construção da gestão democrática

Pós-graduação em Educação - IBRC

Desempenho de escolares do segundo ano do ensino fundamental em provas de compreensão de leitura: elaboração de procedimento avaliativo

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Análise de vocábulos recorrentes e preferenciais na obra As mulheres de Tijucopapo, de Marilene Felinto, e na respectiva tradução para o inglês The women of Tijucopapo, realizada por Irene Mathews, com base em aspectos de normalização

Pós-graduação em Estudos Linguísticos - IBILCE

O estabelecimento virtual na sociedade técnica: a necessária busca de segurança jurídica nas transações comerciais

Pós-graduação em Direito - FCHS

O traduzir como terceira margem: aspectos da narrativa rosiana Campo Geral na versão traduzida para o italiano por Edoardo Bizzarri

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

As ações assistenciais promovidas pelas Igrejas Pentecostais no município de Londrina (1970 – 1990)

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)