This article presents a unified state-space model for ship maneuvering, station-keeping, and control in a seaway. The frequency-dependent potential and viscous damping terms, which in classic theory results in a convolution integral not suited for real-time simulation, is compactly represented by using a state-space formulation. The separation of the vessel model into a low-frequency model (rep...

While probabilistic methods have been applied extensively to quantify uncertainty of sea environments and estimate reliability of naval vessels under normal seaway loads, their extension to surface ships subjected to extreme dynamic loads due to collision, grounding, and weapon effects has not been well explored. Under these extreme loads, the structural response behaves nonlinearly. In additio...

THE HEALTH OF ANIMALS DIVISION, Canada Department of Agriculture, sends best wishes to the veterinary profession on the occasion of this Centennial and Convention issue of the Journal. The principal function of the Health of Animals Division is the administration of services arising from legislation, the Animal Contagious Diseases Act and the Meat Inspection Act. It is timely to note that the p...

Detailed sedimentological analysis of a prodeltaic turbidite unit within the Pennsylvanian Minturn Formation provides insight into the nature of fan-delta deposition, and allows reconstruction of paleogeographic and paleoclimatic conditions within a tectonically active cratonic basin. The formation, a thick succession of fan-delta deposits, exhibits a complex stratigraphic architecture of alluv...

In this work, the QFT technique was used to control a system with three degrees of freedom of coupled movement. The example is the coupling between the vertical and the horizontal dynamics of a high-speed craft. Since the angle between the heading and the seaway is different from 180 degrees, the action of the actuators for controlling each dynamic produces a coupling in the other dynamic. Firs...

Microproblematica are microfossils whose suprageneric taxonomic status is unknown. Many microproblematica display an encrusting way of life and can therefore be included in the group of “micro-encrusters” that during the Upper Jurassic were conspicuous components of microbial carbonate crusts (e.g. LEINFELDER et al., 1993; SCHMID, 1996; DUPRAZ & STRASSER, 1999, 2002). These forms are widespread...

vivian fransozo, antonio lea~o castilho, fu’ lvio aure’lio morais freire, michele furlan, aria’dine cristine de almeida, gustavo monteiro teixeira and juan antonio baeza NEBECC (Crustacean Biology, Ecology and Culture Study Group), Departamento de Zoologia, Instituto de Biociências, Universidade Estadual Paulista, 18.618.000—Botucatu, SP, Brazil, Departamento de Ciências Animais, Universidade F...

Thousands introduced annually: the aquarium pathway for non-indigenous plants to the St Lawrence Seaway J Ji il ll l C Co oh he en n, , N Ni ic ch ho ol la as s M Mi ir ro ot tc ch hn ni ic ck k, , a an nd d B Br ri ia an n L Le eu un ng g Please note: This article was downloaded from Frontiers e-View, a service that publishes fully edited and formatted manuscripts before they appear in print i...