P.S. FROG is a bi-directional (dipole-like) point-absorber, consisting of a floating flap or paddle, facing the waves and reacting against them by means of a large interior moving mass housed in an enlar ed section at the bottom (Fig. l). The dynamics were reported in 1986(1) , but have since been simplified by formulating them in terms of the motion in surge of the centre of wave pressure. It ...

We derived added mass and damping coefficients of a vertical floating circular cylinder due to surge motion in calm water of finite depth. This is done by deriving the velocity potential for the cylinder by considering two regions, namely, interior region and exterior region. The velocity potentials for these two regions are obtained by the method of separation of variables. The continuity of t...

This paper considers point-to-point navigation of underactuated ships where only surge force and yaw moment are available. In general, a ship’s sway motion satisfies a passive-boundedness property which is expressed in terms of a Lyapunov function. Under this kind of consideration, a certain concise nonlinear scheme is proposed to guarantee the closed-loop system to be uniformly ultimately boun...

Longitudinal, heave and pitch, motion of ships in response to encountered waves can be smoothed using moving submerged wings, like transom flaps or a T-foil under the bow. Recently a 3 DOF detailed model of the surge, pitch and heave motions of a fast ferry has been developed, in terms of a structure of twelve transfer functions. On the basis of this model the most effective control for motion ...

Simulation of maneuvering and design of motion controls for marine systems require non-linear mathematical models, which often have more than one-hundred parameters. Model identiication is hence an extremely diicult task. This paper discusses experiment design for marine systems identiication and proposes a sensitivity approach to solve the practical experiment design problem. The applicability...

In an open channel, a sudden drop in water elevation is associated with a negative surge. Practical applications include the ebb tide motion in estuaries with macro-tidal conditions, the rundown of the swash, and the retreat of tsunami waters after reaching the maximum runup. Herein a physical study is presented with a focus on the effects of bed roughness. Detailed measurements were performed ...

Background: The present study aimed to evaluate the surge capability of Shahid Rajaee Trauma Hospital in Shiraz in response to a mass causality incident. Methods: This descriptive study was conducted in Shahid Rajaee Hospital in Shiraz in 2017. The Delphi technique was used in this study. For this purpose, three checklists were used for the emergency department, operating room, and intensive c...

Metal oxide surge arrester accurate modeling and its parameter identification are very important for insulation coordination studies, arrester allocation and system reliability. Since quality and reliability of lightning performance studies can be improved with the more efficient representation of the arresters´ dynamic behavior. In this paper, Big Bang – Big Crunch and Hybrid Big Bang – Big Cr...

PURPOSE To assess the relationship between the kinetics of the serum CA15-3 level and the five-year disease-free survival rate of breast cancer patients. METHODS The subjects of this study, 297 women who were diagnosed with breast cancer, were the subset of patients operated on at Kosin University Gospel Hospital from January 2008 to December 2010. We evaluated the change of serum CA15-3 leve...

1 Overview SURGE (Scalable URL Reference Generator) is a WWW workload generator which is based on analytical models of WWW use. It relies on the fact that a great deal of prior work has been done in the analysis of WWW transactions, and that models for many of the important characteristics of WWW use have been developed. The goal of SURGE is to provide a scalable framework which, from the serve...