To explore the role of visual area V2 in shape analysis, we studied the responses of neurons in area V2 of the alert macaque using a set of 128 grating and geometric line stimuli that varied in their shape characteristics and geometric complexity. Simple stimuli included oriented bars and sinusoidal gratings; complex stimuli included angles, arcs, circles, and intersecting lines, plus hyperboli...

Water samples from the Scheldt estuary were collected in three fractions: (a) unfiltered water, (b) water filtered through a 50 ìm net and (c) water filtered through a 300 ìm net. Particles easily recognisable from the majority of the amorphous particles were isolated and their geometric dimensions measured. From the measurements, shape factors were calculated. Measurement of fractal dimensions...

This is not an arbitrary differential equation of the third order. We have given a completely characteristic set of five geometric properties of the dynamical trajectories in the Princeton Colloquium. The dynamical trajectories are projectively invariant, and recently Terracini has transformed each of the five properties into purely projective language.3 2. In the subsequent discussion, we shal...

Student, Dept. Of Computer Engineering, Grow More Faculty of Engineering Himatnagar, Gujarat, India Asst. Professor, Dept. of Computer Engineering, Grow More Faculty of Engineering Himatnagar, Gujarat, India ---------------------------------------------------------------------***--------------------------------------------------------------------Abstract-In recent years, the data mining techniq...

IVRT is an ITS for visual reasoning, using the missing view problem. It combines an ITS framework with a solid modeling kernel that supports hintgenerating rules using geometric reasoning. We develop an ontology for IVRT’s hint generation rules, and a separate ontology for IVRT’s teaching strategy. Teaching strategy rules are stored in a custom text format, with compilation to Jess. The ability...

We initiate the study of classical knots through the homotopy class of the nth evaluation map of the knot, which is the induced map on the compactified n-point configuration space. Sending a knot to its nth evaluation map realizes the space of knots as a subspace of what we call the nth mapping space model for knots. We compute the homotopy types of the first three mapping space models, showing...

Modeling the deflection of flexible needles is an essential part of needle insertion simulation and path planning. In this paper, three models are compared in terms of accuracy in simulating the bending of a prostate brachytherapy needle. The first two utilize the finite element method, one using geometric non-linearity and triangular plane elements, the other using non-linear beam elements. Th...

Cloud computing is a new delivery model for information technology services and it typically involves the provision of dynamically scalable and often virtualized resources over the Internet. However, cloud computing raises concerns on how cloud service providers, user organizations, and governments should handle such information and interactions. Personal health records represent an emerging pa...

Parallelism of geometric computation can be achieved by distri­ buting the computation efforts according to essentially three different strategies, based on functional, spatial and struc­ tural division, respectively (Mantyla 1983). The conventional and already commercialized way to introduce parallel computa­ tion for viewing 3-D geometric models is employing functional parallelism as a pipeli...