Because commercial aircraft are built with thin-walled structures, their structural performance is well-modeled using shell-element meshes. However, creating these meshes for the full aircraft configuration can be challenging and presents a bottleneck in the design process, especially in a configuration-level design space. This paper presents an algorithm that automatically creates unstructured...

Background and Aim: Congenital or acquired diaphragmatic hernias are both possible. The present study aimed to investigate the superiority of laparoscopic surgery over open repair congenital with bioabsorbable mesh in hernia. Patients Methods: This retrospective was conducted on 7 hernia cases General Surgery Unit Federal Government Polyclinic Hospital, Islamabad from January 2015 December 2022...

It has been observed from the authors’ numerical experiments (2007) that the Local Discontinuous Galerkin (LDG) method converges uniformly under the Shishkin mesh for singularly perturbed two-point boundary problems of the convection-diffusion type. Especially when using a piecewise polynomial space of degree k, the LDG solution achieves the optimal convergence rate k+1 under the L2-norm, and a...

We would like to decompose a closed orientable 2-manifold with arbitrary genus g into a set of four-sided tessellants. The input surface is a triangular surface mesh representing a free-form shape. The search for canonical curves is done in two steps: finding initial curves by means of algebraic or geometric methods and improving them by using combinatorial optimization. Afterward, we perform t...

Among the presently known numerical solvers of integral equations, two main categories of approaches can be traced: • Mesh-free approaches • Mesh-based approaches. We will propose some techniques to process geometric data so that they can be efficiently used in subsequent numerical treatments of integral equations. In order to prepare geometric information so that the above two approaches can b...

The most popular method for the automatic break-up of regions into plane finite elements seems to be variations of the "sides-and-parts" method as discussed in references 1 through 4. in this method the structure is divided into four-sided parts with the sides divided into straight line segments connected at nodes. Figures 1, 2, and 3 show such parts in the form of a square which has a one-to-o...

Todays car body models used for crash-worthiness simulations consist of around half a million nite elements. The interactive visualization of these large scale time-dependent geometries with constant topology on workstation platforms requires a variety of modeling and rendering optimizations. We present a memory eecient scene graph design, an algorithm to concatenate the mainly four-sided eleme...

We report the case of 44-year-old woman with a left-sided Bochdalek hernia (BH) with concomitant partial situs inversus. The patient was presented from the outpatient clinic with lower chest discomfort. She had suffered from abdominal pain for one year, with no history of trauma, previous surgery, or extreme physical exertion. Chest radiograph revealed a large left-sided BH. The patient underwe...

We describe a method for constructing multi resolution models (MRM) of complex triangle meshes and show how these representations can be used to create view dependent adaptive approximations of triangle meshes on the y with guaranteed approximation error. We use a modiied one-sided Hausdorr distance as a geometrically meaningful error value between the original and the simpliied mesh. Since thi...

We present a rare case of Amyand's hernia that was surgically managed using an open repair of hernia combined with laparoscopic appendicectomy. A 68-year-old man presented with an irreducible recurrent right-sided inguinal hernia and abdominal pain. This gentleman had undergone three previous inguinal hernia repairs on the right, and one on the left using the open mesh technique. Ultrasound sug...