This paper focuses on the investigation carried out on the failure of the MSC Napoli using two-dimensional (2D) symmetric (i.e. vertical bending) hydroelasticity analysis. The aim of the investigation was to assess the influence of whipping-induced loads on the structural strength of this containership. Relevant structural, hydrostatic and operational data were provided. The calculations were c...

Abstract. Landfast ice is a common coastal feature in the Arctic Ocean and around Antarctic continent. One contributing stabilizing mechanism grounding of sea ridges shallow water. Recently, scheme representing this effect on dynamics was developed order to improve simulation landfast by continuum-based models. This parameterization assumes that ridged keel thickness proportional mean thickness...

Abstract This study aims to analyse the effect of variations in addition bilge keel on value resistance, ship stability, and seakeeping performances. The research method is carried out by designing analysing hull design fast patrol boat type with a keel. Variations made include length width. are considered applying 4 m, 5 6 while width 0.3 0.4 0.5 m. indicates that nine keels model combination ...

We show by computational solution of the incompressible Navier-Stokes equations with friction force boundary conditions, that the classical inviscid circulation theory by Kutta-Zhukovsky for lift and laminar viscous boundary layer theory by Prandtl for drag, which have dominated 20th century fluid dynamics, do not correctly describe the real turbulent airflow around a sail under tacking. We sho...

Using heuristics from mirror symmetry, combinations of Gross, Hacking, Keel, Kontsevich, and Siebert have given combinatorial constructions canonical bases "theta functions" on the coordinate rings various log Calabi-Yau spaces, including cluster varieties. We prove that theta for varieties are determined by certain descendant Gromov-Witten invariants symplectic leaves mirror/Langlands dual var...

Let X be an Artin stack (always assumed to have quasi-compact and separated diagonal over SpecZ; cf. [2, §1.3]). A coarse moduli space for X is a map π : X → X to an algebraic space such that (i) π is initial among maps from X to algebraic spaces (note that the category of maps from X to an algebraic space is discrete), and (ii) for every algebraically closed field k the map [X (k)]→ X(k) is bi...