in this study, geometrical, gravimetrical and frictional properties of four common varieties of iranian canola seeds (namely: slm, hyola, okapi, orient), containing the mean moisture value of 6.5% (w.b.) were investigated. geometrical and gravimetrical properties included length, diameter, geometric mean diameter, sphericity, thousand seed mass, volume, true density, bulk density and porosity. ...

Abstract In this study, we present a new approach to improving vocal fold access perform phonomicrosurgery. It is done by shooting the laser through mirror reach hidden parts. A geometrical study of path was conducted for anatomical constraints, followed devising laser-shooting system conceptual design. Control laws were developed and tested simulation validated experimentally on test bench in ...

We investigate experimentally and numerically the influence of chemical heterogeneity third-body particles on adhesive contact. Chemical is generated by treatment contacting bodies changing locally surface energy. For studying third body, two types are used: sand with various geometrical shapes sizes, steel spheres equal radius. Dependencies normal force indentation depth at both indenting pull...

The compaction forming of metal powder is a process involving large deformations, large strain, non-linear material behavior and friction. Consequently, the numerical analysis of such a highly non-linear process is a formidable computational problem. In this paper, an ALE technique is presented based on a generalized cap plasticity model in simulation of powder forming processes. In ALE formula...

Objectives Various configurations of kissing stent (KS) configurations exist and patency rates vary. In response the covered endovascular reconstruction of the aortic bifurcation configuration was designed to minimize mismatch and improve outcome. The aim of the current study is to compare geometrical mismatch of kissing stent with the covered endovascular reconstruction of the aortic bifurcati...

We have developed a generic model of echelle spectrographs, based on first optical principles, fully treating 3-dimensions. The geometrical part of it is capable of predicting detector positions for wavelength calibration spectra within 0.2 pix (1 sigma), solely using engineering parameters such as focal lengths, grating constants and configuration angles. First results are also available from ...

The shape of metallic nanoparticles used to enhance the performance of thin-film solar cells is described by Gielis' superformula and optimized by an evolutionary algorithm. As a result, we have found a lens-like nanoparticle capable of improving the short circuit current density to 19.93 mA/cm2. Compared with a two-scale nanospherical configuration recently reported to synthesize the merits of...

Simulated Annealing (SA) is applied in optimization of slotted tube grain configuration. We propose a CAD based geometry calculation function, to increase calculation accuracy, integrated with internal ballistic model. CAD representation encapsulates all of the geometric entities pertinent to the grain design in a parametric way, allowing manipulation of grain entity (web), performing regressio...

This paper describes a two-step algorithm for the qualitative analysis of mechanical devices . The first step takes the geometrical description of the parts andtheir initial position and produces a description of the possible relative motions of pairs in contact by computing the configuration space of those pairs with respect to selected motions. Given the possible relative motions and an input...

Recap: Last time we introduced the principal elements of skeletal models and discussed forward kinematics. Recall that a skeletal model consists of a collection of joints, which have been joined into a rooted tree structure. Each joint of the skeleton is associated with a coordinate frame which specifies its position and orientation in space. Each joint can be rotated (subject to sum constraint...