Proyecto constructivo de un cajón hincado de hormigón armado para el paso inferior en la línea de tren R2 en Castelldefels

Se pretende realizar el proyecto constructivo de un “Cajón hincado de hormigón armado para el paso inferior en la línea de tren R2 en Castelldefels” con la intención de realizar una carretera por debajo la línea férrea, conectando la zona mar con la zona montaña del pueblo. El proyecto de la carretera no se contempla en el presente proyecto constructiv

Toward sustainable management: 2D modelling of a self-cleaning system to improve geometry in front of the flushing gate

This paper aims to show how numerical modelling based on 2D SWE can be used to analyze the cleaning effectiveness of flushing waves in storm tanks. The case study under consideration is an existing storm tank located in Badalona, a municipality of Barcelona, Spain. Storm tank cleaning systems are critical features that must be carefully addressed. If not appropriately addressed, operation and maintenance work costs can drastically increase. There are numerous currently available technologies for cleaning storage tanks. However, no specific guide on this field has been identified. References are provided by the manufacturers through their commercial catalogues. Generally, this information is not based on experimental or numerical experiences or results have not been published in the literature of scientific papers. In this study, a public domain software (IBER) was used to develop 2D hydraulic analysis of the selected tank. The results obtained show how the phenomenon of recirculation is acting in some areas of the lane. This implies a dissipation of energy, thus causing difficulties in terms of cleaning procedures. Furthermore, two new scenarios have been tested to determine how a different lane width might affect hydrodynamic behavior. A newly suggested geometry for the existing lane of the tank is proposed by using the numerical modeling software. The proposed geometry in the current pilot tank achieves higher velocities and avoids recirculation areas. The results demonstrate that numerical modelling of these types of processes is possible with the computer models available (commercial codes) and can be used to optimize cleaning system designPeer ReviewedPostprint (published version

Proyecto constructivo de un cajón hincado de hormigón armado para el paso inferior en la línea de tren R2 en Castelldefels

Se pretende realizar el proyecto constructivo de un “Cajón hincado de hormigón armado para el paso inferior en la línea de tren R2 en Castelldefels” con la intención de realizar una carretera por debajo la línea férrea, conectando la zona mar con la zona montaña del pueblo. El proyecto de la carretera no se contempla en el presente proyecto constructiv

Toward sustainable management: 2D modelling of a self-cleaning system to improve geometry in front of the flushing gate

This paper aims to show how numerical modelling based on 2D SWE can be used to analyze the cleaning effectiveness of flushing waves in storm tanks. The case study under consideration is an existing storm tank located in Badalona, a municipality of Barcelona, Spain. Storm tank cleaning systems are critical features that must be carefully addressed. If not appropriately addressed, operation and maintenance work costs can drastically increase. There are numerous currently available technologies for cleaning storage tanks. However, no specific guide on this field has been identified. References are provided by the manufacturers through their commercial catalogues. Generally, this information is not based on experimental or numerical experiences or results have not been published in the literature of scientific papers. In this study, a public domain software (IBER) was used to develop 2D hydraulic analysis of the selected tank. The results obtained show how the phenomenon of recirculation is acting in some areas of the lane. This implies a dissipation of energy, thus causing difficulties in terms of cleaning procedures. Furthermore, two new scenarios have been tested to determine how a different lane width might affect hydrodynamic behavior. A newly suggested geometry for the existing lane of the tank is proposed by using the numerical modeling software. The proposed geometry in the current pilot tank achieves higher velocities and avoids recirculation areas. The results demonstrate that numerical modelling of these types of processes is possible with the computer models available (commercial codes) and can be used to optimize cleaning system designPeer Reviewe

Deep-sea anglerfish (Lophiiformes: Ceratioidei) diversity from the western North Atlantic throughout morphology and DNA barcoding

13 pages, 2 tables, 11 figuresFifteen specimens representing nine species of ceratioid fishes (Lophiiformes: Ceratioidei) were caught in Flemish Cap and Grand Banks of the western North Atlantic: Ceratias holboelli Krøyer, 1845 (Ceratiidae), Melanocetus murrayi Günther, 1887 (Melanocetidae), Leptacanthichthys gracilispinis (Regan, 1925), Dolopichthys karsteni Leipertz & Pietsch, 1987, Dolopichthys pullatus Regan & Trewavas, 1932, Oneirodes eschrichtii Lütken, 1871, Oneirodes macrosteus Pietsch 1974 and Oneirodes carlsbergi (Regan & Trewavas, 1932) (Oneirodidae), and Linophryne cf. brevibarbata Beebe, 1932 (Linophrynidae). Identification was carried out by means of integrative taxonomy, combining the examination of morphological and molecular characters (DNA barcoding). The analysis showed two morphological types of D. pullatus distinguishable by the shape and morphology of the esca and the number and size of the teeth. The occurrence of Oneirodes carlsbergi represents the northernmost record in the western Atlantic. As results of the molecular analysis, 15 new ceratioid sequences were added to molecular repositories, two of them, O. carlsbergi and Linophryne cf. brevibarbata for the first time. The comparison of some nucleotide sequences shows new relationships between the genera Bertella and Dolopichthys, and also makes it possible to correct some of the erroneous assignments made in the databases. The combination of classical and molecular taxonomy has been useful for the delimitation and characterisation of these ceratioid species, contributing to a better understanding of their distribution and inter- and intraspecific variabilityThe survey research has been funded by the European Union through the European Maritime and Fisheries Fund (EMFF) within the National Program of collection, management and use of data in the fisheries sector and support for scientific advice regarding the Common Fisheries Policy. David Barros-García was supported by national funds by FCT -Foundation for Science and Technology (2020.04364.CEECIND). Alejandro de Carlos was partly funded thanks to a grant for the consolidation and structuring of competitive research units in the universities of the Galician university system with reference ED431C 2019/28, awarded by the Xunta de GaliciaPeer reviewe