We propose a new class of approximate local DtN boundary conditions to be applied on elliptical-shaped exterior boundaries when solving acoustic scattering problems by elongated obstacles. These conditions are : (a) exact for the first modes, (b) easy to implement and to parallelize, (c) compatible with the local structure of the computational finite element scheme, and (d) applicable to exteri...

Abstract According to the findings of article, researchers looked at graphene-based hexagonal microstrip patch antennas. In place a U-shaped slot and an elliptical slot, ellipse-shaped was cut into surface radiators that were used in designs recommended. This helped improve radiation performance radiators. A frequency known as ultra-wideband (UWB) is modelling process for anticipated structures...

This paper describes the use of a low level, computationally inexpensive motion detector to initiate a higher level motion tracker based on an elliptical active contour or snake. The contour tracker is in turn used to direct a camera mounted on a robot arm. to track head shaped objects.

Segmentation is one of the most important steps in image analysis. Image segmentation is the process of separating the foreground objects from the background. The earlier techniques use Genetic Algorithms (GAs) to separate the images containing regular, circular and elliptical-shaped objects from the background. The proposed technique uses the GA to segment the images containing irregular shape...

AIM The present study was conducted to know the ultrastructural detail of the blood cells of Uttara fowl (native fowl of Uttarakhand). MATERIALS AND METHODS The experiment was conducted on 10 apparently healthy adult birds of either sex reared at the Instructional Poultry Farm, G.B. Pant University of Agriculture and Technology, Pantnagar, Uttarakhand. The blood was collected from wing vein u...

This paper introduces a new configuration of compact, triangular- and diamond-slotted, microstrip-fed, low-profile antenna for C/X band applications on polytetrafluoroethylene glass microfiber reinforced material substrate. The antenna is composed of a rectangular-shaped patch containing eight triangles and two diamond-shaped slots and an elliptical-slotted ground plane. The rectangular-shaped ...

Nano- and microparticles of various shapes have recently been introduced for various drug-delivery applications. Shape of particles has been shown to have an impact on various processes including circulation, vascular adhesion and phagocytosis. Here, we assess the role of particle geometry and surface chemistry in their interactions with cell membranes. Using representative particles of differe...

Contents 1. Introduction 2. Electronic states in a weakly oblated ellipsoidal quantum dot (impermeable walls). 3. The model of finite deep rectangular ellipsoidal well 4. Strongly oblated ellipsoidal quantum dot 5. Strongly prolated ellipsoidal quantum dot 6. Electronic states in a cylindrical quantum dot having elliptical lens shaped cross section 7. Electronic states in a cylindrical quantum ...