16,783 research outputs found
Real-time monitoring of port dynamics for safety of navigation and mooring manoeuvres within the European Interreg Maritime Project SINAPSI
No full textThe present PhD thesis developed within the Project “SINAPSI - Navigation assistance for safe access to ports”, which was part of the Interreg Italy-France Maritime 2014-2020 Programme. The Project involved Italian and French Partners, for the creation and development of instrumentation networks suitable for monitoring marine conditions in the Project ports, aiming to improve the safety of navigation. The Port of Genoa was one of the entities involved, and this thesis dealed specifically with the implementation of a network of Acoustic Doppler current profilers (ADCPs) for monitoring port water dynamics. Initially,
a characterization of the Port of Genoa area was conducted, both in terms of management and logistics, and of the most frequently occurring weather and sea conditions, to identify the areas that may be most problematic for navigational safety and most interesting for the study of dynamics. In addition, a research regarding the issues and conditions most frequently encountered in maritime accidents was conducted , including the role of weather and sea conditions. Furthermore, part of the PhD Project was the involvement of international port realities to obtain useful information with respect to the characteristics that a monitoring network must have in order to be as efficient as possible.
Before the set up of the network of current meters, monitoring campaigns has been carried out, with the aim to collect data on the dynamics of the Port of Genoa under different weather conditions, providing preliminary information to create a solid base on which to develop the Project, and to be compared with the data obtained from the monitoring network. The implementation of the monitoring network consisted of several steps, as the acquisition of the instruments and the facilities for their installation and for data transmission, the identification of suitable sites for the placement of the current meters, and finally the installation of the instruments in the Port of Genoa. Once the monitoring network was installed, the data obtained has been analysed for the study of water dynamics in the Port of Genoa. Therefore, this PhD Project therefore aimed to realise a fundamental tool for ensuring safety to navigation in port waters, also deepening scientific knowledge regarding the water dynamics of the area Port of Genoa
The sponge fauna of the Seno Magdalena and Puyuhuapi Fjord (Chile), with a description of two new species
No full textBertolino, Marco, Costa, Gabriele, Reboa, Anna, Bavestrello, Giorgio, Pansini, Maurizio, Betti, Federico, Bo, Marzia, Daneri, Giovanni (2019): The sponge fauna of the Seno Magdalena and Puyuhuapi Fjord (Chile), with a description of two new species. Zootaxa 4623 (2): 306-320, DOI: https://doi.org/10.11646/zootaxa.4623.2.
FIGURE 5 in The sponge fauna of the Seno Magdalena and Puyuhuapi Fjord (Chile), with a description of two new species
No full textFIGURE 5. Hamigera cleistochela sp. nov.; (A) the holotype in life; (B) polytylote styles I; (C) polytylote styles II; (D) Cleistochelae; (E) Arcuate isochelae.Published as part of Bertolino, Marco, Costa, Gabriele, Reboa, Anna, Bavestrello, Giorgio, Pansini, Maurizio, Betti, Federico, Bo, Marzia & Daneri, Giovanni, 2019, The sponge fauna of the Seno Magdalena and Puyuhuapi Fjord (Chile), with a description of two new species, pp. 306-320 in Zootaxa 4623 (2) on page 316, DOI: 10.11646/zootaxa.4623.2.5, http://zenodo.org/record/325547
A porcine study of ultrasound-guided versus fluoroscopy-guided placement of endovascular balloons in the inferior vena cava (REBOVC) and the aorta (REBOA)
No full textObjectives In fluoroscopy-free settings, alternative safe and quick methods for placing resuscitative endovascular balloon occlusion of the aorta (REBOA) and resuscitative endovascular balloon occlusion of the inferior vena cava (REBOVC) are needed. Ultrasound is being increasingly used to guide the placement of REBOA in the absence of fluoroscopy. Our hypothesis was that ultrasound could be used to adequately visualize the suprahepatic vena cava and guide REBOVC positioning, without significant time-delay, when compared with fluoroscopic guidance, and compared with the corresponding REBOA placement.Methods Nine anesthetized pigs were used to compare ultrasound-guided placement of supraceliac REBOA and suprahepatic REBOVC with corresponding fluoroscopic guidance, in terms of correct placement and speed. Accuracy was controlled by fluoroscopy. Four intervention groups: (1) fluoroscopy REBOA, (2) fluoroscopy REBOVC, (3) ultrasound REBOA and (4) ultrasound REBOVC. The aim was to carry out the four interventions in all animals. Randomization was performed to either fluoroscopic or ultrasound guidance being used first. The time required to position the balloons in the supraceliac aorta or in the suprahepatic inferior vena cava was recorded and compared between the four intervention groups.Results Ultrasound-guided REBOA and REBOVC placement was completed in eight animals, respectively. All eight had correctly positioned REBOA and REBOVC on fluoroscopic verification. Fluoroscopy-guided REBOA placement was slightly faster (median 14 s, IQR 13–17 s) than ultrasound-guided REBOA (median 22 s, IQR 21–25 s, p=0.024). The corresponding comparisons of the REBOVC groups were not statistically significant, with fluoroscopy-guided REBOVC taking 19 s, median (IQR 11–22 s) and ultrasound-guided REBOVC taking 28 s, median (IQR 20–34 s, p=0.19).Conclusion Ultrasound adequately and quickly guide the placement of supraceliac REBOA and suprahepatic REBOVC in a porcine laboratory model, however, safety issues must be considered before use in trauma patients.Level of evidence Prospective, experimental, animal study. Basic science study
An Article About Albertus C. Van Raalte, Author Unknown, Except for Parts Taken from an Article by Anna C. Post
No full textAn article about Albertus C. Van Raalte, author unknown, except for parts taken from an article by Anna C. Post. The author knew first generation persons in the Holland settlement and therefore, the article has some value.https://digitalcommons.hope.edu/vrp_1890s/1012/thumbnail.jp
Mugilidae fish as bioindicator for monitoring plastic pollution: Comparison between a commercial port and a fishpond (north-western Mediterranean Sea)
No full textIn the last decade, interest in monitoring and managing plastic pollution has greatly increased. This study compared levels of microplastic contamination in stomachs of Mugilidae fish, suggesting this family as a target for plastic pollution monitoring in areas with different degrees of anthropisation. Two sites characterised by low and high anthropic impact, a fishpond (S'Ena Arrubia, Italy) and a port (Genoa, Italy), respectively, were compared. This study highlighted a stronger microplastic contamination in the port, with a higher percentage of fish showing the presence of microplastics and a larger polymeric variability compared to the fishpond. The microplastic number in fish from the port was higher than in the literature, but it was not significantly different from S'Ena Arrubia in terms of the microplastic percentage found in single individuals. Biomonitoring of microplastic contamination in Mugilidae fish resulted in a valid tool for the investigation of areas differently affected by human activity
Relationship between benthic fishes and bottom sediment metals in the Gulf of Tigullio (Ligurian Sea, Italy)
No full textThe contamination of heavy metals in water and sediments, when occurring in higher concentrations, is a serious threat because of their toxicity, long persistence, and bioaccumulation and biomagnification in the food chain. Fishes are used as bioindicators, playing an important role in monitoring heavy metals pollution. Morphological endpoints in gills, liver and kidney of benthic teleosts living in heavy metal contaminated sites are presented in this study
Sponge Spicules in Sediments: A Proxy for Past and Present Sponge Fauna Assessment in Ha Long Bay (Vietnam)
No full textThe study of cryptic sponges can be challenging, as they are difficult to detect in the environment without the use of destructive methods. The permanence of mineral skeletal components of Porifera in sediments is therefore a tool that can provide support for a more comprehensive study of sponge fauna. In this context, sediments collected from four karst lakes in Ha Long Bay (Vietnam), plus two surrounding sea areas, were processed to extract spicules belonging to sponges with siliceous skeletons. From the morphology of the spicules, it was possible to trace the taxa of the sponges present in the area at that time or earlier. It was found that each lake had a sponge fauna composition characterized by different families and genera. Moreover, sponge taxa identified in the surrounding sea areas differed significantly from the ones inside of the neighboring lakes. In addition, it was possible to identify the presence of four sponge genera not yet recorded in the South China Sea area. Thus, the study of spicules trapped in sediments proved to be a useful tool for a comprehensive study of sponge fauna
The sponge fauna of the Seno Magdalena and Puyuhuapi Fjord (Chile), with a description of two new species
No full textThe presence of fjords, islands and channels originating from glacial erosion and ice cap retreat, makes the Chilean benthic biodiversity difficult to explore and study. Our survey of this region allowed the identification of 29 Demospongiae species in total. Two of them are new to science and here described: Biemna lutea sp. nov., and Hamigera cleistochela sp. nov.. Two species (Clathria (Clathria) microxa and Lissodendoryx (Ectyodoryx) patagonica,) are new for the region and the Chilean fjords. Lissodendoryx (Ectyodoryx) patagonica was found for the second time after the original description by Ridley & Dendy, 132 years ago. These results – considering the small number of species identified on the whole – are promising and confirm that the marine biodiversity of Chilean fjords is remarkable but not well known yet
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