Three-dimensional excitation vortices exist in systems such as chemical reactions and the human heart. Their one-dimensional rotation backbone can pin to unexcitable heterogeneities, which greatly affect the structure, dynamics, and lifetime of the vortex. In experiments with the Belousov-Zhabotinsky reaction, we demonstrate vortex unpinning from a pair of inert and impermeable spheres using ex...

In this study, a limit equilibrium method has been developed that satisfies all conditions of equilibrium and assumes circular slip surfaces. All force and moment equilibrium equations are employed without using simplification assumptions. A non-linear optimization technique is used to solve the system of equations with the corresponding constraints. The proposed method is capable to determine ...

There is no consensus on the optimal treatment for mid-shaft clavicular fracture. We conducted a meta-analysis to compare the effectiveness of non-operative treatment, plate fixation, and intramedullary pin fixation in terms of the Constant-Murley Score (CMS) for treatment of mid-shaft clavicular fracture. Comprehensive search of the Embase, Cochrane Library and PubMed was conducted to retrieve...

Digital micro-fluidic biochips have represented as a small integrated tool for large biological sample analysis. Only nanoliter volume of discrete fluid droplets (sample) is required to manipulate the integrated chips on an electrode array via electrical actuation. Each electrode activate with independent pin for direct addressing biochip. For low cost and disposal biochip, pin-constraint desig...

Today's High-Speed Machining (HSM) machine tool combines productivity and part quality. The difficulty inherent in HSM operations lies in understanding the impact of machine tool behaviour on machining time and part quality. Analysis of some of the relevant ISO standards (230-1998, 10791-1998) and a complementary protocol for better understanding HSM technology are presented in the first part o...

This article aims to investigate the influence of different contact conditions on friction properties an Nb-stabilized AISI 430 ferritic stainless-steel sheet with deep drawing quality. Three tribological tests were performed: pin-on-disk, bending under tension, and strip-tension test. Moreover, counter samples a hard metal (WC-12%Co) surface finishes 0.27 0.54 ?m used in dry lubricated conditi...

Friction stir spot welding (FSSW) is a solid state method mainly used to join non-ferrous metals and their alloys. When opposed other processes, FSSW has the benefits of being pollution-free having no filler material. In this study an attempt was made for multi response optimization friction welded EN AW 5005 aluminum alloy using Taguchi Grey relational analysis (GRA). Pin height (h, mm), tool ...

INTRODUCTION Childhood vaccination rates in Manitoba populations with low socioeconomic status (SES) fall significantly below the provincial average. This study examined the impact of a pay-for-performance (P4P) program called the Physician Integrated Network (PIN) on health inequity in childhood vaccination rates. METHODS The study used administrative data housed at the Manitoba Centre for H...