The Baltic Sea belongs to a global system of protected area and has a status of Particularly Sensitive Sea Area (PSSA) which results in a mechanism for strict control on interna tional shipping activities within designated areas through the UN International Maritime Or ganization (IMO). Countries can declare such areas, and then establish rules for t heir protection. Additionaly almost the enti...

The benthic stages of Dreissenidae and Mytilidae may be dispersed over long distances while attached to ship hulls. Alternatively, larvae may be transported by water currents and in the ballast and bilge water of ships and vessels. To gain insight into dispersal potential and habitat suitability, survival of the benthic stages of two invasive dreissenid species (Dreissena polymorpha and Mytilop...

This paper presents a review of the different methods and techniques used to optimize ship hulls over last six years (2017–2022). shows percentages reduction in resistance, thus fuel consumption, improve ships’ energy efficiency, towards achieving goal maritime decarbonization. Operational research machine learning are common decision support find optimal solution. covers four areas hulls, incl...

this experiment was carried out using 200 ross 308 broiler chickens in a completely randomized design with 5 treatments and 4 replicates. the true metabolisable energy of the barley hulls were determined using cecectomized roosters.the dry matter, true metabolisable energy, ash, ether extracts, crude protein, crude fiber, ndf, adf, ca and total p content of barely hulls were: 92%, 978 kcal/kg, ...

This article analyzes the areas of localization wear outer plating hulls ships inland and mixed (river-sea) navigation causes them. It is noted that problem sheets associated with tasks ensuring watertightness strength ship hulls, on which preservation functionality as floating transport engineering structures depends. The results study show that: 1) skin vessels studied groups (pusher tugs, oi...

In this study, the effect of joint optimization principal dimensions and hull form on hydrodynamic performance a bulk carrier was studied. first part process, fast principal-dimension origin parent ship considering integrated resistance, seakeeping, maneuverability, as well their relationships with were analyzed in detail based seakeeping qualities, maneuverability empirical methods Holtrop Men...

‎In this paper‎, ‎some algebraic and geometrical properties of the rank$-k$ numerical hulls of normal matrices are investigated‎. ‎A characterization of normal matrices whose rank$-1$ numerical hulls are equal to their numerical range is given‎. ‎Moreover‎, ‎using the extreme points of the numerical range‎, ‎the higher rank numerical hulls of matrices of the form $A_1 oplus i A_2$‎, ‎where $A_1...