Several recent studies demonstrate a real potential in taking tubular structures as a base for image registration. In this paper, we present a novel technique to conduct deformations on tubular structures. Our approach aligns a pre-extracted tubular model, e.g. vessels inside an organ or a set of bones, with an image by combining both rigid and elastic transformations. The physical structure an...

The aim objective of this study is to investigate the effects of near-field earthquakes on the response of mid-rise buildings with tubular structure.  For this purpose, a 20-story building with a square plan of six by six bays, all with 6 m span, and story height of 3.70 m is considered.  Axial force of columns, shear lag, and inter-story drift values are used as the main response parameters. N...

The visual examination of colonoscopic images fails to extract precise geometric information the colonic surface. Reconstructing 3D surface colon from image sequences may thus add valuable clinical information. We address this problem extracting spatio-temporal structure images. Using just intrinsically calibrated monocular stream, we develop a technique compute depth certain feature points tha...

In the present study the impulse Ib transmitted by a hemispherical contact charge is calculated analytically and compared with experimental measurements. The impulse is measured experimentally with the use of a ballistic pendulum. The explosive charge is placed on a disk shaped striking mass. The mass is in contact with a nondeformable tubular structure placed on an instrumented base on a balli...

Nitrogen and metal doped nanocarbons derived from polyaniline (PANI) have been widely explored as electrocatalysts for the oxygen reduction reaction (ORR) in fuel cells. In this work, we report surfactant-template synthesis of PANI nanostructures and the ORR electrocatalysts derived from them. By using cationic surfactant such as the cetyl trimethyl ammonium bromide (CTAB) as the template and t...

The inverse protein folding problem is that of designing an amino acid sequence which has a prescribed native protein fold. This problem arises in drug design where a particular structure is necessary to ensure proper protein-protein interactions. In this paper, we show that in the HP model of Dill on the 3D (hexagonal prism) lattice it is possible to solve this problem for a class of structure...

background & objectives: tubular adenomas are rare benign epithelial tumours of breast affecting predominantly females of child bearing age group. till now, very small number of cases have been reported in the literature. present study was carried out to evaluate the clinico-pathological features of tubular adenoma cases diagnosed during three years study period along with discussion of pos...

The inner mitochondrial membrane has been shown to have a novel structure that contains tubular components whose radii are on the order of 10 nm as well as comparatively flat regions [1]. The structural organization of mitochondria is important to understanding their functionality. We present a model that can account, thermodynamically, for the observed size of the tubules. The model contains t...

1.1 Offshore Structures: Offshore structures used for oil and gas extraction have the common function of providing a safe, dry working environment for the equipment and persons those operates the platform. Jacket supported drilling equipment as a guide for the piled foundations. The substructure referred to as the jacket is a three dimensional space frame made from large tubular steel members. ...