The attractive mechanical properties and light weight to strength ratio Glass Fiber Reinforced Plastic (GFRP) composites are preferred in automobile aerospace industries. Drilling process is one of the basic important manufacturing processes. GFRP its issues with hole quality fiber crack, roughness surface, dimensional error delamination. In this work, effect three different drill (Slot type, t...

Structures consisting of cables and membranes have been of interest to engineers due to their higher ratio of strength to weight and lower cost compared to other structures. One of the challenges in such structures is presence of holes in membranes, which leads to non-uniform stress and strain distributions, even under uniform far-field deformations. One of the approaches suggested for controll...

UNLABELLED In SPECT using high-energy photon-emitting isotopes, such as (131)I, parallel-hole collimators with thick septa are required to limit septal penetration, at the cost of sensitivity and resolution. This study investigated a parallel-hole collimator with cone-shaped holes, which was designed to limit collimator penetration while preserving resolution and sensitivity. The objective was ...

Tantalum-178 is a short-liver radionuclide (T 1/2 = 9.3 min.) and emits primarily 56- to 64-keV characteristic x-rays. We have determined the imaging characteristics with this radionuclide and a large-field-of-view Anger camera. With a pinhole collimator, good spatial resolution is possible with Ta-178, although the image quality is superior with Tc-99m under comparable conditions. Spatial reso...

In computer aided geometric design and computer graphics, high quality fair surfaces with G2 smoothness are sometimes required. In this paper we derive a general sixth order geometric partial differential equation from minimizing a curvature integral functional. The obtained equation is used to solve several surface modeling problems such as free-form surface design, surface blending and N-side...

This thesis focuses on regularities, shared by within an object and among objects, to improve the quality of facade reconstruction from point cloud. There are three main objectives in the research. The first is to detect the wall and its holes, which represent existence of windows, intrusions or extrusions on the wall. Second, local regularities within one hole and global regularities shared am...

Physical and geometric based variational techniques for surface construction have been shown to be advanced methods for designing high quality surfaces in the fields of CAD and CAGD. In this paper, we derive an Euler-Lagrange equation from a geometric invariant curvature integral functional–the integral about the mean curvature gradient. Using this Euler-Lagrange equation, we construct a sixtho...

Damage begins after a female bores a hole in the berry and builds a gallery in the seed where eggs are deposited. After hatching, the larvae start consuming the seed [1]. Feeding by adults and larvae can turn the bean into a dusty mass of frass, but even lightly bored beans have a distinctive blue-green staining which lowers quality. The galleries allow pathogens to enter, leading to fermentati...

Wireless Sensor Networks (WSN) are highly distributed self organized systems. WSN have been deployed in various fields. Because of some hardware problems, especially with respect to energy supply and miniaturization, WSN have certain short comings. This paper focuses on various issues such as routing challenges and design issues, topology issues and Quality of Service support issues associated ...