In west coast groundfish stock assessments, biological productivity is largely defined by a single parameter, i.e., steepness (h) of the Beverton-Holt spawner-recruit curve, which ranges from 0.20 (no compensation) to 1.00 (complete compensation). A steepness of 0.20 implies no latent surplus production and a total lack of resilience to the effects of exploitation, whereas a value of 1.0 implie...

This study deals with wave-induced unsteady pressure on a ship moving constant forward speed in regular head waves. Two different numerical methods are applied to solve wave–ship interaction problems: Rankine panel method which adopts velocity potential, and Cartesian-grid solves the momentum mass conservation equations under assumption of inviscid incompressible fluids. Before comparing l1ocal...

In the classical water-wave problem, fully localized nonlinear waves of permanent form, commonly referred to as lumps, are possible only if both gravity and surface tension are present. While much attention has been paid to shallow-water lumps, which are generalizations of Korteweg-de Vries solitary waves, the present study is concerned with a distinct class of gravity-capillary lumps recently ...

Theoretical and experimental studies have shown that restitution of the cardiac action potential (AP) duration (APD) plays a major role in predisposing ventricular tachycardia to degenerate to ventricular fibrillation, whereas its role in atrial fibrillation is unclear. We used the Courtemanche human atrial cell model and the Luo-Rudy guinea pig ventricular model to compare the roles of electri...

The time development of ripples under sea waves is investigated by means of the weakly nonlinear stability analysis of a flat sandy bottom subjected to the viscous oscillatory flow that is present in the boundary layer at the bottom of propagating sea waves. Second-order effects in the wave steepness are considered, to take into account the presence of the steady drift generated by the surface ...

A numerical model for long-term simulation of gravity surface waves is described. The model is designed as a component of a coupled Wave Boundary Layer/Sea Waves model, for investigation of small-scale dynamic and thermodynamic interactions between the ocean and atmosphere. Statistical properties of nonlinear wave fields are investigated on a basis of direct hydrodynamical modeling of 1-D poten...

This paper extends our previous study of the breaking probability of dominant deep water gravity surface waves into the finite water depth environment. It reports a unified behavior of the mean breaking statistics once the effects of finite water depth are taken into account. The shallow water wave data that form the basis of this study were acquired at a field experiment site at Lake George, N...

13 We update recent work on the scientific inference and reproductive biology of steepness in three 14 directions. First, we show how variation in natural mortality can be included in the formula 15 for steepness, for both a biomass dynamics and age-structure models. We do this using the 16 delta-method, so that only the mean and covariance of natural mortality rates appear in the 17 characteri...

Giedrë Kobs1, Olaf Bernhardt2, Georg Meyer2 1 Department of Prosthetic Dentistry, Institute of Stomatology, Vilnius University, Vilnius, Lithuania 2 Department of Restorative Dentistry, Periodontology and Pediatric Dentistry, School of Dentistry, University of Greifswald, Germany The purpose of our research was to verify the hypothesis that flat articular eminence is the result of progressive i...