Search results for "boat"

Dispositivo di smorzamento del rollio per imbarcazioni all’ancora o alla deriva con motori spenti

2015

La presente invenzione si riferisce ad un nuovo dispositivo di smorzamento del rollio, inseribile e disinseribile, per imbarcazioni all’ancora o alla deriva con motori spenti. Novel roll damping device for a vessel, in particular when the vessel is anchored or drifting with the engines off

PATRIMONIO MILITARE E PROGETTI DI RIGENERAZIONE URBANA. L’INFRASTRUTTURA BELLICA DELL’ATLANTIC WALL E DI SAINT-NAZAIRE

2013

Nel 2010, la base sottomarina di Saint-Nazaire è stata dichiarata «patrimonio del XX secolo» dal Ministère de la Culture et de la Communnication francese ed è divenuta il simbolo di un nuovo approccio patrimoniale che riconosce il patrimonio materiale e immateriale in tutte le sue forme, non limitandosi soltanto al manufatto certificato come monumento. La memoria, i beni materiali o i luoghi poco conosciuti possono così contribuire a definire una nuova dimensione urbana, che si relaziona al futuro. Riferirsi esplicitamente al tema del rapporto tra waterfornt e patrimoinio militare, attraverso l’esempio di Saint-Nazaire, ci porta a riflettere sul ruolo del progetto urbano nella trasformazion…

Invariant Feature Matching for Image Registration Application Based on New Dissimilarity of Spatial Features

2016

An invariant feature matching method is proposed as a spatially invariant feature matching approach. Deformation effects, such as affine and homography, change the local information within the image and can result in ambiguous local information pertaining to image points. New method based on dissimilarity values, which measures the dissimilarity of the features through the path based on Eigenvector properties, is proposed. Evidence shows that existing matching techniques using similarity metrics--such as normalized cross-correlation, squared sum of intensity differences and correlation coefficient--are insufficient for achieving adequate results under different image deformations. Thus, new…

Passero Passer italiae x hispaniolensis nidificante su barca da pesca in Sicilia

2022

This short note reports the curious breeding, in terms of nest features, of several Sparrows mainly showing the phenotype of the Spanish Sparrow or Passer prope hispaniolensis, though, few males exhibited less barred flanks as for the Passer italiae. This is in agre- ement with the ambiguous taxonomy of Sparrows of Sicily that is emerged over the past 150 years. As matter of fact, the taxonomic classification of the Sicilian sparrow spans from Passer hispaniolen- sis to Passer italiae and includes hybrid species in between. Massa et al (2022) propose to name these populations Passer italiae x hispa- niolensis. Here, for the first time, the curious nesting of Passer prope hispa- niolensis on…

Effect of boat noise on the behaviour of bluefin tuna Thunnus thynnus in the Mediterranean Sea

2007

The effect of boat noise on the behaviour of bluefin tuna Thunnus thynnus was investi- gated in the Egadi Islands, Sicily, during spring 2005 using a fixed tuna trap set near shipping routes. Tuna behaviour was observed when exposed to both natural ambient sound and sound generated by hydrofoil passenger ferries, small boats and large car ferries. Acoustical and behavioural analyses were conducted with and without extraneous sound to define a list of behavioural categories. Each vessel produced different engine sounds with regard to their composition and bandwidth, and all were distinctly different from ambient sound levels. In the absence of boat noise, tuna assumed a con- centrated coordi…

The detrimental consequences for seagrass of ineffective marine park management related to boat anchoring.

2014

Posidonia oceanica (L.) Delile meadows are recognized as priority habitat for conservation by the EU Habitats Directive. The La Maddalena Archipelago National Park (Mediterranean Sea) P. oceanica meadow. , the dominant coastal habitat of the area, is mostly threatened by boat anchoring. 12. years after the establishment of mooring fields and anchoring restrictions, a study was conducted to measure their effectiveness on the conservation of seagrass and the mitigation of anchoring damage. We found that: (i) the condition of P. oceanica was disturbed, both in the mooring fields and in control locations; (ii) mooring fields and anchoring restrictions did not show to be an efficient system for …

Boat traffic in the Lampedusa waters (Strait of Sicily, Mediterranean Sea) and its relationship to common bottlenose dolphin Tursiops truncatus distr…

2010

The volume of boat traffic and its potential connection to the coastal distribution of the common bottlenose dolphin (Tursiops truncatus) was evaluated off Lampedusa Island (Strait of Sicily). From July to September 2006 daily surveys were carried out at eight sites along the coast, three times a day, to assess the number, type, and size of boats moving, fishing, or stationed in Lampedusa waters. The study area was divided into four geographic areas: northwest, northeast, southwest, and southeast. Data were analyzed to determine the difference in the number of boats among the areas, sampling months, and times of day. The presence of dolphins was monitored by standardized land-based observat…

Monitoring habitat use of common bottlenose dolphins (Tursiops truncatus) and boat traffic using Passive Acoustic Monitoring devices in a marine prot…

2014

FLUID MECHANICS ANALYSIS OF A SAILBOAT MAST

2009

This study aims to analyze different configurations of mast-sail coupling of a boat with single sail and wishbone rig to vary the shape of the cross-section of the mast that is to assess the influence of the mast on the performance of the sail. The analysis is performed with four several shapes of the mast cross section and several angles of attack to the wind. The numerical simulations on different geometries show an improvement by using a wing shape for the mast rotated in the direction of the wind, in all the corners. This solution allows to rotate rigidly the system mast-boom-sail in order to maintain the same angle of incidence and maximize the efficiency of the sail. The efficiency in…

Nota, Tribunale di Livorno, sentenza 2 maggio 2016

2016

L’attività di organizzazione del gioco acquatico “banana boat” non può considerarsi pericolosa ai sensi dell’art. 2050 c.c., considerato che nell'ambito delle attività pericolose “atipiche” (ossia, quelle che non sono qualificate tali dalla legge di pubblica sicurezza o da altre leggi speciali) rientrano quelle che, per la loro stessa natura o per le caratteristiche dei mezzi adoperati, comportano una rilevante possibilità del verificarsi di un danno per la loro spiccata potenzialità offensiva