This paper presents a novel method for modifying the shapes of existing uniform bi-cubic B-spline surfaces by interactively editing the curvatures along isoparametric curves. The method allows us to edit the curvatures of the two intersecting isoparametric curves at each knot with specified positions, unit tangents, and unit normals. The user adjusts the radii of circles, representing the radii...

The main functions of a WSN transmitter are to modulate the base band data onto an RF carrier, amplify the modulated signal and to provide matching to the antenna for efficient power delivery into the free space. It requires low radiated power due to shorter communication distance, low data rate with low power consumption and fast wake up time. These unique specifications require modification o...

Bio-additive manufacturing is a promising tool to fabricate porous scaffold structures for expediting the tissue regeneration processes. Unlike the most traditional bulk material objects, the microstructures of tissue and organs are mostly highly anisotropic, heterogeneous, and porous in nature. However, modelling the internal heterogeneity of tissues/organs structures in the traditional CAD en...

In the literature on filter design, the system whose state has to be estimated is usually assumed known. However, in most practical situations, this assumption does not hold, and a two-step procedure is adopted: 1) a model is identified from a set of noise-corrupted data; 2) on the basis of the identified model, a Kalman filter is designed. In this paper, the idea of directly identifying the fi...

1. Abstract This paper presents a new fully stressed design method for the solution of the general weight optimization problem applicable to determinate trusses subject to displacement constraints. Fully stressed design (FSD) has been a popular method to perform structural optimization when only stress constraints are considered. It is attractive because it reaches the optimal design following ...

The preceding design methods have been based on designing an analog prototype lter and then converting it to a digital lter. This approach is appropriate for the class of approximations where analytical solutions are possible, but not for many others. In the remaining part of this chapter, methods will be developed that directly design the desired digital lter. Most approaches are extensions of...

Spatial coordinate transformations have helped simplifying mathematical issues and solving complex boundary-value problems in physics for decades already. More recently, material-parameter transformations have also become an intuitive and powerful engineering tool for designing inhomogeneous and anisotropic material distributions that perform wanted functions, e.g., invisibility cloaking. A nec...

Contact details: Dr Michael Dieter Bahnhofstrasse 50 9470 Buchs Switzerland [email protected] Figure 1: Initial situation: Unsatisfactory smile with multiple carious lesions, discoloured composite restorations and abraded areas. This clinical case report describes in detail the application of Tetric N-Collection to reconstruct the patient’s smile chairside in the least invasive manner. Dir...

We discuss the object-oriented design of a software package for solving sparse, symmetric systems of equations (positive definite and indefinite) by direct methods. At the highest layers, we decouple data structure classes from algorithmic classes for flexibility. We describe the important structural and algorithmic classes in our design, and discuss the trade-offs we made for high performance....