ADIFFERENCE has been observed in certain instances between the onset of QRS in intracavitary and surface limb leads. Simultaneous tracings demonstrate that when premature ventricular depolarization exists the early rapid growth in magnitude of potential recorded by intracavitary leads may be nearly or totally inapparent in surface leads. Following premature depolarization changes occur in intra...

This study investigates how ambivalence over emotional expressiveness (AEE) relates to various aspects of intimate relationships, including perception of the relationship, marital satisfaction, and dyadic closeness. Whereas most commonly AEE has been treated as an individual attribute, we suggest looking at a combined measure of the AEE of both spouses as a dyadic attribute. We examine the cont...

A weakly nonlinear multiple-scales analysis is performed for singly resonant second-harmonic generation. Coupled amplitude equations are derived that describe pattern formation above the transverse instability threshold. The amplitude equations explain the absence of roll patterns and are in good agreement with numerical results. Ó 2000 Elsevier Science B.V. All rights reserved. PACS: 42.65.Sf;...

We extend the mechanism for noise-induced phase transitions proposed by Ibañes et al. [Phys. Rev. Lett. 87, 020601-1 (2001)] to pattern formation phenomena. In contrast with known mechanisms for pure noise-induced pattern formation, this mechanism is not driven by a short-time instability amplified by collective effects. The phenomenon is analyzed by means of a modulated mean field approximatio...

This pilot study of 23 mothers with attention-deficit/hyperactivity disorder (ADHD) and their offspring with ADHD examined the effects of maternal stimulant medication on observed interactions. Parent-child interactions were observed using a structured protocol before and after mothers underwent a 5-week, double-blind stimulant titration. Despite dramatic effects of medication on adult ADHD sym...

In this paper, we propose a new receptor-based model for pattern formation and regulation in a fresh-water polyp, namely hydra. The model is defined in the form of a system of reaction-diffusion equations with zero-flux boundary conditions coupled with a system of ordinary differential equations. The production of diffusible biochemical molecules has a hysteretic dependence on the density of th...

The sound is widely used in marine observatories as an alternative means to retrieve information about environmental data in the sea area under surveillance. The original idea of using specifically man-made sound sources to send signals in the marine environment triggered the idea of ocean acoustic tomography and many alternative methods have been developed to exploit the acoustic measurements ...

There are various fantastic biological phenomena in biological pattern formation. Mathematical modeling using reaction-diffusion partial differential equation systems is employed to study the mechanism of pattern formation. However, model parameter selection is both difficult and time consuming. In this paper, a visual feedback simulation framework is proposed to calculate the parameters of a m...

PBS140 offers good cold preservation in renal transplantation and now, crucially, has been shown to promote immediate function following warm ischemia. For a new cold preservation solution to compete with UW solution, improved efficacy and lower price may not be enough. Reducing rates of delayed graft function in organs from non-heart-beating and marginal donors might be the key.

An electric-field-induced phase transition and pattern formation in a binary dielectric fluid layer are studied using a coarse-grained free-energy functional. The electrostatic part of the free energy is a nonlinear functional of the dielectric function, which depends in turn on the local colloidal concentration. We determine the phase coexistence curve and find that beyond a critical electric ...