Permutation Groups
Mostrando 1-12 de 15 artigos, teses e dissertações.
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1. Proposal of signal constellations for the genetic code / Proposta de constelações de sinais para o codigo genetico
A proposta deste trabalho é apresentar uma abordagem aos processos genéticos e moleculares, utilizando a teoria de comunicações e codificação na modelagem do dogma central da biologia molecular. A partir desta modelagem associamos o código genético a um modulador de um sistema de comunicação. Mais especificamente, tal procedimento consiste em const
Publicado em: 2008
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2. Latin squares and applications / Quadrados latinos e aplicações
Neste trabalho estudaremos a estrutura dos quadrados latinos sob ponto de vista da matemática discreta. Faremos uma série de equivalências com outras estruturas tais como Teoria dos Grafos, Grupos, e sempre enfocando questões enumerativas. Certas propriedades de quadrados latinos, tais como ortogonalidade vão trabalhadas. E encerraremos com aplicações
Publicado em: 2006
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3. O teorema de enumeração de Polya, generalizações e aplicações / Polya s enmeration theorem, generalizations and applications
Neste trabalho são desenvolvidos conceitos algébricos, analíticos e combinatórios que culminam no Teorema de Enumeração de Pólya; bem como são fornecidas muitas de suas aplicações em enumeração de padrões (grafos, colorações geométricas, tipos e permutações, etc). Tal teorema clássico, que tem suas bases em Teoria dos Grupos, utiliza funda
Publicado em: 2005
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4. Rearranjo de genomas : uma coletanea de artigos
Nowadays, a huge amount of genetic information is public1y available. Genomic s current challenge is to process this information in order to obtain relevant biological conc1usions. One possible way of structuring this information is through genome comparison, where we seek similarities and differences among the genomes of two or more organisms. In this conte
Publicado em: 2002
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5. Rearranjo de genomas : uma coletanea de artigos
Nowadays, a huge amount of genetic information is public1y available. Genomic s current challenge is to process this information in order to obtain relevant biological conc1usions. One possible way of structuring this information is through genome comparison, where we seek similarities and differences among the genomes of two or more organisms. In this conte
Publicado em: 2002
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6. An Algebraic Description of Stereochemical Correspondence
It is shown that a stereochemical correspondence between two molecular systems can be represented by a commuting diagram of the point groups and permutation groups involved. The effect of the diagrammatic condition on the mappings of the cosets, double cosets, subgroup lattice, and double coset algebra determined for the two molecular systems by point group
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7. THE POWER GROUP OF TWO PERMUTATION GROUPS*
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8. Colored lattices
Combinations of translations and color permutations are derived that leave a periodic array of colored points—a colored lattice—apparently unchanged. It is found that there are three types of colored lattices: (1) those in which all rows and nets have more than one color, (2) those in which there are rows with only one color, and (3) those in which there
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9. Using scientific evidence to improve hospital library services: Southern Chapter/Medical Library Association journal usage study.
BACKGROUND: Journal usage studies, which are useful for budget management and for evaluating collection performance relative to library use, have generally described a single library or subject discipline. The Southern Chapter/Medical Library Association (SC/MLA) study has examined journal usage at the aggregate data level with the long-term goal of developi
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10. Molecular phylogeny of the insect order Hymenoptera: apocritan relationships.
Phylogenetic relationships among the major groups of hymenopteran insects were investigated by using comparative sequence information from the mitochondrial 16S rRNA gene. The placement of the ectoparasitic Stephanidae as the sister group to the remaining Apocrita confirmed ectoparasitism as the ground plan biology for the Apocrita. Endoparasitism evolved at
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11. Efficacy of rapamycin and FK 506 in prolonging rat hind limb allograft survival.
OBJECTIVE: Graft rejection and the toxicity of current immunosuppressive regimens preclude the application of microsurgical advances to transplantation of limbs or other nonessential parts. If limb transplantation is to become a clinical reality, newer, safer, more effective immunosuppressive agents are needed. SUMMARY BACKGROUND DATA: Rapamycin (RPM) and FK
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12. Evidence for positive selection and population structure at the human MAO-A gene
We report the analysis of human nucleotide diversity at a genetic locus known to be involved in a behavioral phenotype, the monoamine oxidase A gene. Sequencing of five regions totaling 18.8 kb and spanning 90 kb of the monoamine oxidase A gene was carried out in 56 male individuals from seven different ethnogeographic groups. We uncovered 41 segregating sit
The National Academy of Sciences.