Metric Structures
Mostrando 25-35 de 35 artigos, teses e dissertações.
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25. Report on the Teichmüller Metric*
Let Tg be the Teichmüller space of compact Riemann surfaces of genus g. Then Tg is the space of conformal structures on a fixed surface W modulo equivalence under conformal maps homotopic to the identity. The Teichmüller modular group [unk] is the group of all orientation preserving homeomorphisms of W onto itself modulo those which are homotopic to the id
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26. Analysis of the conformational energy landscape of human snRNA with a metric based on tree representation of RNA structures
It is an outstanding problem to clarify how the RNA sequence is related to its structure and biological functions. We developed a simplified definition of a metric for tree representation of RNA secondary structures and analyzed the conformational energy landscapes of human spliceosomal snRNAs. We discuss the structural properties of the biological sequence
Oxford University Press.
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27. From local to global in quasiconformal structures.
We exhibit a large class of metric spaces whose infinitesimal quasiconformal structure is strong enough to capture the global quasiconformal structure. A sufficient condition for this to happen is described in terms of a Poincaré-type inequality.
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28. Increasing the power of functional maps of the medial temporal lobe by using large deformation diffeomorphic metric mapping
The functional magnetic resonance imagery responses of declarative memory tasks in the medial temporal lobe (MTL) are examined by using large deformation diffeomorphic metric mapping (LDDMM) to remove anatomical variations across subjects. LDDMM is used to map the structures of the MTL in multiple subjects into extrinsic atlas coordinates; these same diffeom
National Academy of Sciences.
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29. Automatic classification of protein structure by using Gauss integrals
We introduce a method of looking at, analyzing, and comparing protein structures. The topology of a protein is captured by 30 numbers inspired by Vassiliev knot invariants. To illustrate the simplicity and power of this topological approach, we construct a measure (scaled Gauss metric, SGM) of similarity of protein shapes. Under this metric, protein chains n
The National Academy of Sciences.
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30. Improved recognition of native-like protein structures using a family of designed sequences
The goal of the inverse protein folding problem is to identify amino acid sequences that stabilize a given target protein conformation. Methods that attempt to solve this problem have proven useful for protein sequence design. Here we show that the same methods can provide valuable information for protein fold recognition and for ab initio protein structure
The National Academy of Sciences.
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31. Integration of related sequences with protein three-dimensional structural families in an updated version of PALI database
The database of Phylogeny and ALIgnment of homologous protein structures (PALI) contains three-dimensional (3-D) structure-dependent sequence alignments as well as structure-based phylogenetic trees of protein domains in various families. The latest updated version (Release 2.1) comprises of 844 families of homologous proteins involving 3863 protein domain s
Oxford University Press.
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32. Fourier analysis of human soft tissue facial shape: sex differences in normal adults.
Sexual dimorphism in human facial form involves both size and shape variations of the soft tissue structures. These variations are conventionally appreciated using linear and angular measurements, as well as ratios, taken from photographs or radiographs. Unfortunately this metric approach provides adequate quantitative information about size only, eluding th
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33. Analysis of the Covariance Structure of Digital Ridge Counts in the Offspring of Monozygotic Twins
Improved methods for analysis of covariance structures now permit the rigorous testing of multivariate genetic hypotheses. Using Jöreskog 's Lisrel IV computer program we have conducted a confirmatory factor analysis of dermal ridge counts on the individual fingers of 509 offspring of 107 monozygotic twin pairs. Prior to the initiation of the model-fitting
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34. PALI—a database of Phylogeny and ALIgnment of homologous protein structures
PALI (release 1.2) contains three-dimensional (3-D) structure-dependent sequence alignments as well as structure-based phylogenetic trees of homologous protein domains in various families. The data set of homologous protein structures has been derived by consulting the SCOP database (release 1.50) and the data set comprises 604 families of homologous pr
Oxford University Press.
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35. Semi-automated Phalanx Bone Segmentation Using the Expectation Maximization Algorithm
Medical imaging technologies have allowed for in vivo exploration and evaluation of the human musculoskeletal system. Three-dimensional bone models generated using image-segmentation techniques provide a means to optimize individualized orthopedic surgical procedures using engineering analyses. However, many of the current segmentation techniques are not cli
Springer-Verlag.