Today’s geometric modeling tools are usually controlled by the mouse and keyboard. 3dmodeling operations are often constrained to planes or lines to make modeling easier. New augmented reality devices promise new classes of applications with natural 3d user interfaces. This paper deals with a new method that enables users to model 3d shapes directly with their fingers. It is implemented in Arti...

This paper proposes a method of geometric modeling of features extracted from 3D face and presents some of its applications. It describes a new automatic pose and expression invariant feature extraction algorithms to extract features (control points) from eyebrows, nose and lips of 3D facial data. The proposed algorithms are tested on BU-3DFE (Binghamton University 3D Facial Expression) Databas...

the relationship between verbs and their arguments is a widely debated topic in linguistics. this important area of research explores current theories of how a verb’s semantics can determine the morphosyntactic realization of its arguments. according to levin (2005) event structure and aspectual structure are the first determining factors in argument realization. so, in this article we aimed to...

One generic technique for model idealisation is dimensional reduction. In dimensional reduction, the finite element model makes use of elements of reduced dimension, such as beams, plates and shells. This project describes some operations that have been defined and implemented which allow the user to reduce the dimensionality of geometric models automatically using a novel decomposition and red...

Among the eigenvalue problems of the Laplacian, the biharmonic operator eigenvalue problems are interesting projects because these problems root in physics and geometric analysis. The buckling problem is one of the most important problems in physics, and many studies have been done by the researchers about the solution and the estimate of its eigenvalue. In this paper, first, we obtain the evol...

in this research a three dimensional model is explained which simulate the oil spill behavior inseas. this model is the developed version of previous two-dimensional study of aghajanloo et al., 2013.because of three-dimensional nature of the oil dispersion/movement in water, this is a more realistic model of oil spill transport and fate in marine environment. the model is based on eulerian appr...

In dense biological tissues, cell types performing different roles remain segregated by maintaining sharp interfaces. To better understand the mechanisms for such compartmentalization, we study effect of an imposed heterotypic tension at interface between two distinct in a fully 3D Voronoi model confluent tissues. We find that cells rapidly sort and self-organize to generate tissue-scale types,...

We describe an experimental prototype system in which a virtual protractor is used to measure three dimensional relationships between objects. The objects being measured are not modeled explicitly using surface or procedural geometric definitions in the traditional sense, but rather are perceived by a viewer who looks at stereo image pairs. In contrast, the virtual instrument itself is represen...