931 resultados para Encoding (symbols)


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Paper submitted to MML 2013, 6th International Workshop on Machine Learning and Music, Prague, September 23, 2013.

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Tese de mestrado integrado em Engenharia Biomédica e Biofísica, apresentada à Universidade de Lisboa, através da Faculdade de Ciências, 2016

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“The Franco-German friendship is rich in memories and gestures that are at once important and symbolic, and that characterize the exceptional nature of the relationship between our two countries,” reflects former French economics minister and European Commission President Jacques Delors. Such symbolic acts and joint memories are not primarily about cooperation in specific instances. Rather, more generally, they denote what it means to act together. They lend significance to a relationship; they signify what is “at stake,” or what it is “all about.” They are about a deeper and more general social purpose underlying specific instances of cooperation. They are about the value and intrinsic importance that social relations incorporate. Symbols contribute to the institutionalization of social meaning and social purpose in dealing with one another. In this paper I clarify the concept of “predominantly symbolic acts and practices among states,” systematically explore such acts for the bilateral Franco-German relationship between the late 1950s and the mid-1990s, and scrutinize the specific meaning and effects that these practices have helped to generate and perpetuate.

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During infections, Giardia lamblia undergoes a continuous change of its major surface antigens, the variant-specific surface proteins (VSPs). Many studies on antigenic variation have been performed using G. lamblia clone GS/M-83-H7, which expresses surface antigen VSP H7. The present study was focused on the identification and characterization of vsp gene sequences within the genome of the clonal G. lamblia GS/M-83-H7 line. For this purpose, we applied a PCR which specifically amplified truncated sequences from the 3'-terminal region of the vsp genes. Upon cloning, most of the vsp gene amplification products were shown to be approximately identical in size and thus could not be distinguished from each other by conventional gel electrophoresis. In order to pre-estimate the sequence complexity within the large panel of vsp clones isolated, we elaborated a novel concept which facilitated our large-scale genetic screening approach: PCR products from cloned DNA molecules were generated and then subjected to a DNA melting profile assay based on the use of the LightCycler Instrument. This high-throughput assay system proved to be well suited to monitor sequence differences between the amplification products from closely related vsp genes and thus could be used for the primary, sequence-related discrimination of the corresponding clones. After testing 50 candidates, vsp clones could be divided into five groups, each characterized by an individual DNA melting profile of the corresponding amplification products. Sequence analysis of some of these 50 candidates confirmed data from the aforementioned assay in that clones were demonstrated to be identical within, but different between, the distinct groups. The nucleotide and deduced amino acid sequences of five representative vsp clones showed high similarities both among each other and also with the corresponding gene segment of the variant-specific surface antigen (VSP H7) expressed by the original GS/M-83-H7 variant type. Furthermore, three of the genomic vsp sequences turned out to be identical to vsp sequences that represented previously characterized transcription products from in vivo- or in vitro-switched GS/M-83-H7 trophozoites. In conclusion, the DNA melting profile assay seems to be a versatile tool for the PCR-based genotyping of moderately or highly diversified sequence orthologues.

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Transportation Department, Research and Special Programs Administration, Washington, D.C.

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"United Nations publication sales no.: 1956.I.4."--T.p. verso

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Thesis (M. S.)--University of Illinois at Urbana-Champaign.

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Mode of access: Internet.

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Mode of access: Internet.