computer model of the patellofemoral joint was developed and the effects on the anterior displacement of the tibial tuberosity were investigated. the input geometrical and verification data for the model were obtained form an experimental study on a cadaver knee, mounted in an instron machine. the computer program found the configuration of the patellofemoral joint which satified both the geome...

Predicting the effective elastic properties of carbon nanotube-reinforced nanocomposites is of great interest to many structural designers and engineers for improving material and configuration design in recent years. In this paper, a finite element model of a CNT composite has been developed using the Representative volume element (RVE) to evaluate the effective material properties of nanocomp...

GeoSpelling as the basis of the Geometrical Product Specifications (GPS) standard [1] enables a comprehensive modeling framework and an unambiguous language to describe geometrical variations during the overall product life cycle. This is accomplished by providing a set of concepts and operations based on the fundamental concept of the “Skin Model”. However, the definition of GeoSpelling has no...

The biggest challenge for geometrical room acoustic computer models is to capture complex wave phenomena while maintaining the low computational load of the ray tracing algorithm. Special corrections must be added to the ray tracing algorithm to account for wave phenomena such as edge diffraction, which are ignored by classical geometrical acoustics. ODEON, a well-known geometrical computer mod...

Computational models offer an excellent tool for the study and analysis of scientific discovery processes. The study of failures provides an insight into the history and philosophy of science as valuable as the study of successful discoveries. Using a computational model I analyzed Kepler’s approach in formulating a quantitative law for refraction. Although Kepler ultimately failed in discoveri...

The unphysical runaway solutions of the Lorentz-Dirac equation are reanalyzed using the local Fermi-Walker rest frames of particles. We show that the radiation reaction term can be removed by a quantization of time ansatz. The result is that the runaway solutions for the free electron can be eliminated, and the runaway solutions for particles with masses greater than the electron can be reinter...

Segmentation in high dimensional space, e.g. 4D, often requires decomposition of the space and sequential data process, for instance space followed by time. In [1], the authors presented a deformable model that can be generalized into arbitrary dimensions. However, its direct implementation is computationally prohibitive. The more efficient method proposed by the same authors has significant ov...

The concept of Design for Assembly (DFA) assure cost effective assembly process by minimizing the assembly efforts. Part count reduction is one of the primary objective of DFA, which reduces the number of assembly levels and assembly tooling. However reducing part count with modified part geometries do not allow to follow the same assembly sequence that of used earlier. In this contest a framew...

Recent experimental studies have revealed that bacteria, such as C. crescentus, show a remarkable spatial ordering of their chromosome. A strong linear correlation has been found between the position of genes on the chromosomal map and their spatial position in the cellular volume. We show that this correlation can be explained by a purely geometrical model. Namely, self-avoidance of DNA, speci...