Medical and Biomedical Researches

Cyclooxygenase-2 expression in primary and recurrent pterygium.

June 28th, 2008
Cyclooxygenase-2 expression in primary and recurrent pterygium. Background: Pterygia are common, benign, fibrovascular, and infiltrative processes of the corneo-conjunctival junction of unknown pathogenesis. Cyclooxygenase-2 (COX-2) mediates the rate-limiting step in arachidonic acid metabolism. Extensive evidence indicates that the COX-2 prostanoid pathway is involved in inflammation. The ...

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Post-penetrating keratoplasty glaucoma.

June 28th, 2008
Post-penetrating keratoplasty glaucoma. Post-penetrating keratoplasty (post-PK) glaucoma is an important cause of irreversible visual loss and graft failure. The etiology for this disorder is multifactorial, and with the use of new diagnostic equipment, it is now possible to elucidate the exact pathophysiology of this condition. A ...

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Teledermatology in India: Practical implications.

June 28th, 2008
Teledermatology in India: Practical implications. Teledermatology is considered to be one of the solutions to the problem of inadequate number of dermatologists in remote parts of India. We present a brief account of the technological components involved in teledermatology in India, and an evaluation of the ...

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Myxoid adrenal adenoma with focal pseudoglandular pattern.

June 28th, 2008
Myxoid adrenal adenoma with focal pseudoglandular pattern. Adrenal cortical tumors with myxoid change are rare tumors. To our knowledge, only 22 cases have been described so far in literature, which include 13 carcinomas and 9 adenomas. A pseudoglandular pattern has been described in 9 of these ...

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Secondary osteoporosis due to sickle cell anemia: Do sex steroids play a role?

June 28th, 2008
Secondary osteoporosis due to sickle cell anemia: Do sex steroids play a role? Background : The exact cause of osteoporosis in patients with sickle cell disease (SCD) is not known, and various hypotheses have been put forward. Aim: To assess the effect of sex steroids on ...

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Screening of school children for blood lead levels and attempts to reduce them by nonpharmacological

June 28th, 2008
Screening of school children for blood lead levels and attempts to reduce them by nonpharmacological means in a coastal city of India. Context : Lead is a major health hazard, especially in children. Impact of lead poisoning on our society is not known. Effectiveness of environmental ...

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Role of hyoscine N-butyl bromide (HBB, buscopan (R)) as labor analgesic.

June 28th, 2008
Role of hyoscine N-butyl bromide (HBB, buscopan (R)) as labor analgesic. Background: Hyoscine N-butyl bromide (HBB) acts by inhibiting cholinergic transmission in the abdomino-pelvic parasympathetic ganglia, thus relieving spasm in the smooth muscles of gastrointestinal, biliary, urinary tract and female genital organs, especially the cervico-uterine plexus ...

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Multiresolution indexing of triangulated irregular networks.

June 28th, 2008
Multiresolution indexing of triangulated irregular networks. Abstract-We show how to build a continuous, one-dimensional index of the points on a triangulated irregular network (TIN). The index is constructed by first finding an ordering of the triangles in which consecutive triangles share a vertex or an edge. ...

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Conveying Shape with Texture: Experimental Investigations of Texture’s Effects on Shape Categorizat

June 28th, 2008
Conveying Shape with Texture: Experimental Investigations of Texture\'s Effects on Shape Categorization Judgments. Abstract-In this paper, we describe the results of two comprehensive controlled observer experiments intended to yield insight into the following question: If we could design the ideal texture pattern to apply to an ...

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Robust linear dimensionality reduction.

June 28th, 2008
Robust linear dimensionality reduction. Abstract-We present a novel family of data-driven linear transformations, aimed at finding low-dimensional embeddings of multivariate data, in a way that optimally preserves the structure of the data. The well-studied PCA and Fisher\'s LDA are shown to be special members in this ...

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A Model for Smooth Viewing and Navigation of Large 2D Information Spaces.

June 28th, 2008
A Model for Smooth Viewing and Navigation of Large 2D Information Spaces. Abstract-Large 2D information spaces, such as maps, images, or abstract visualizations, require views at various level of detail: close ups to inspect details, overviews to maintain (literally) an overview. Users often change their view ...

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Interactive visualization of three-dimensional vector fields with flexible appearance control.

June 28th, 2008
Interactive visualization of three-dimensional vector fields with flexible appearance control. Abstract-In this paper, we present an interactive texture-based algorithm for visualizing three-dimensional steady and unsteady vector fields. The goal of the algorithm is to provide a general volume rendering framework allowing the user to compute three-dimensional ...

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A streaming narrow-band algorithm: interactive computation and visualization of level sets.

June 28th, 2008
A streaming narrow-band algorithm: interactive computation and visualization of level sets. Abstract-Deformable isosurfaces, implemented with level-set methods, have demonstrated a great potential in visualization and computer graphics for applications such as segmentation, surface processing, and physically-based modeling. Their usefulness has been limited, however, by their high ...

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O-buffer: a framework for sample-based graphics.

June 28th, 2008
O-buffer: a framework for sample-based graphics. Abstract-We present an innovative modeling and rendering primitive, called the O-buffer, as a framework for sample-based graphics. The 2D or 3D O-buffer is, in essence, a conventional image or a volume, respectively, except that samples are not restricted to a ...

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Reconstruction of volume data with quadratic super splines.

June 28th, 2008
Reconstruction of volume data with quadratic super splines. Abstract-We propose a new approach to reconstruct nondiscrete models from gridded volume samples. As a model, we use quadratic trivariate super splines on a uniform tetrahedral partition. We discuss the smoothness and approximation properties of our model and ...

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A topological hierarchy for functions on triangulated surfaces.

June 28th, 2008
A topological hierarchy for functions on triangulated surfaces. Abstract-We combine topological and geometric methods to construct a multiresolution representation for a function over a two-dimensional domain. In a preprocessing stage, we create the Morse-Smale complex of the function and progressively simplify its topology by cancelling pairs ...

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Counting cases in substitope algorithms.

June 28th, 2008
Counting cases in substitope algorithms. Abstract-We describe how to count the cases that arise in a family of visualization techniques, including Marching Cubes, Sweeping Simplices, Contour Meshing, Interval Volumes, and Separating Surfaces. Counting the cases is the first step toward developing a generic visualization algorithm to ...

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Efficient implementation of real-time view-dependent multiresolution meshing.

June 28th, 2008
Efficient implementation of real-time view-dependent multiresolution meshing. Abstract-In this paper, we present an efficient (topology preserving) multiresolution meshing framework for interactive level-of-detail (LOD) generation and rendering of large triangle meshes. More specifically, the presented approach, called FastMesh, provides view-dependent LOD generation and real-time mesh simplification that ...

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A new physical model with multilayer architecture for facial expression animation using dynamic adap

June 28th, 2008
A new physical model with multilayer architecture for facial expression animation using dynamic adaptive mesh. Abstract-This paper presents a new physically-based 3D facial model based on anatomical knowledge which provides high fidelity for facial expression animation while optimizing the computation. Our facial model has a multilayer ...

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Generalized B-spline subdivision-surface wavelets for geometry compression.

June 28th, 2008
Generalized B-spline subdivision-surface wavelets for geometry compression. Abstract-We present a new construction of lifted biorthogonal wavelets on surfaces of arbitrary two-manifold topology for compression and multiresolution representation. Our method combines three approaches: subdivision surfaces of arbitrary topology, B-spline wavelets, and the lifting scheme for biorthogonal wavelet ...

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Real-time finite element modeling for surgery simulation: an application to virtual suturing.

June 28th, 2008
Real-time finite element modeling for surgery simulation: an application to virtual suturing. Abstract-Real-time finite element (FE) analysis can be used to represent complex deformable geometries in virtual environments. The need for accurate surgical simulation has spurred the development of many of the new real-time FE methodologies ...

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Hierarchical data visualization using a fast rectangle-packing algorithm.

June 28th, 2008
Hierarchical data visualization using a fast rectangle-packing algorithm. Abstract-This paper presents a technique for the representation of large-scale hierarchical data which aims to provide good overviews of complete structures and the content of the data in one display space. The technique represents the data by using ...

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Camera-based detection and removal of shadows from interactive multiprojector displays.

June 28th, 2008
Camera-based detection and removal of shadows from interactive multiprojector displays. Abstract-Front-projection displays are a cost-effective and increasingly popular method for large format visualization and immersive rendering of virtual models. New approaches to projector tiling, automatic calibration, and color balancing have made multiprojector display systems feasible without ...

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Synthesis and rendering of bidirectional texture functions on arbitrary surfaces.

June 28th, 2008
Synthesis and rendering of bidirectional texture functions on arbitrary surfaces. Abstract-The bidirectional texture function (BTF) is a 6D function that describes the appearance of a real-world surface as a function of lighting and viewing directions. The BTF can model the fine-scale shadows, occlusions, and specularities caused ...

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Efficient Example-Based Painting and Synthesis of 2D Directional Texture.

June 28th, 2008
Efficient Example-Based Painting and Synthesis of 2D Directional Texture. Abstract-We present a new method for converting a photo or image to a synthesized painting following the painting style of an example painting. Treating painting styles of brush strokes as sample textures, we reduce the problem of ...

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