Negative Poisson's ratio foam was used in the development of seat cushions which exert reduced peak pressure upon the skin of seated persons. Foam processing techniques were scaled up. A longer processing time was required for cushion size samples in comparison with small samples. Pressure distributions on a seated subject were measured using a pressure-sensitive array. Seated pressure distribu...

Idiopathic monomorphic ventricular tachycardia and premature ventricular complexes (PVCs) commonly arise from the right and left ventricular outflow tracts (VOT). Their mechanism is most commonly triggered activity from delayed after-depolarizations and successful ablation is performed at the site of earliest endocardial activation. Re-entrant mechanisms have been rarely described. We report a ...

We present spatio-temporal characteristics of spreading depolarizations (SD) in two experimental systems: retracting SD wave segments observed with intrinsic optical signals in chicken retina, and spontaneously occurring re-entrant SD waves that repeatedly spread across gyrencephalic feline cortex observed by laser speckle flowmetry. A mathematical framework of reaction-diffusion systems with a...

The re-entrant flow shop scheduling problem (RFSP) is regarded as a NP-hard problem and attracted the attention of both researchers and industry. Current approach attempts to minimize the makespan of RFSP without considering the interdependency between the resource constraints and the re-entrant probability. This paper proposed Multi-level genetic algorithm (GA) by including the co-related reen...

Re-entrant modulation of visual cortex has been suggested as a critical process for enhancing perception of emotionally arousing visual stimuli. This study explores how the time information inherent in large-scale electrocortical measures can be used to examine the functional relationships among the structures involved in emotional perception. Granger causality analysis was conducted on steady-...

Energy-corrected finite element methods provide an attractive technique to deal with elliptic problems in domains with re-entrant corners. Optimal convergence rates in weighted L2-norms can be fully recovered by a local modification of the stiffness matrix at the re-entrant corner, and no pollution effect occurs. Although the existence of optimal correction factors is established, it remains op...

The magnetic phase diagram in the H-T coordinates has been determined for ?-Fe68V32 from ZFC/FC magnetization measurements. re-entrant character of magnetism, going paramagnetic through ferromagnetic to spin-glass (SG) states, evidenced. SG is magnetically heterogeneous, because two sub phases can be identified i.e. with strong (SG-SI) and weak (SG-WI) irreversibility. Tirr Tcros were quantitat...

This paper studies the exertion of market power in large buyer groups confronting an incumbent monopolist and a potential market entrant in a repeated trade situation. In the experiment, buyer power can either occur as demand withholding when only the incumbent is present in the market, or it can take the form of buying at higher prices from the entrant in order to foster future re-entry. Compa...

1. Our group has developed finite element models of ventricular anatomy that incorporate detailed structural information. These have been used to study normal electrical activation and re-entrant arrhythmia. 2. A model based on the actual three-dimensional microstructure of a transmural left ventricular (LV) segment predicts that cleavage planes between muscle layers may give rise to non-unifor...

This paper presents the development of an alternative method for makespan computation algorithms of a re-entrant flow shop scheduling problem using bottleneck analysis. The computation is specifically intended for the cyber manufacturing centre (CMC) which is an Internet based collaborative design and manufacturing services at Universiti Tun Hussein Onn Malaysia. The CMC processes scheduling re...