1,720,965 research outputs found
Experimental and Numerical Investigation On Wave Transmission Past Rubble-Mound Submerged Breakwaters
No full textIn this paper the wave transmission past submerged breakwaters is investigated with the use of a 2D Boussinesq-type model (BOUSS-2D) developed by the U.S. Army Corps of Engineers (USACE) included in the AquaveoTM Surface-water Modelling System (SMS). Due to the nature of the model the submerged barrier has been treated as surface-piercing porous structure implemented in the model as a porous layer boundary. The numerical model has been calibrated and validated against 2D
physical model tests (Ciardulli, 2009) performed at the LInC Laboratory of University of Naples “Federico II”. A simple method to derive the porous layer parameters has been proposed providing engineers with guidelines for the use of porous layer to predict transmission coefficient behind submerged structures when using Boussinesq-type 2D (horizontal) numerical model. Numerical predictions have been found to be in good agreement with measurements (R2 statistics around 0.9) as well
as with outcomes of the semi-empirical equations by Buccino and Calabrese and d’Angremond et al. (maximum difference 0.08)
Analisi sperimentale sull'interazione non lineare tra moto ondoso regolare e barriere sommerse
No full textIl lavoro rivolge la propria attenzione ai caratteri dell'interazione non lineare tra moto ondoso periodico e barriere sommerse. Particolare attenzione viene prestata ai fenomeni di interferenza associati alla produzione di super-armoniche libere nell'area protetta
General model for estimation of longshore transport at shingle/mixed beaches
No full textIn the present study, the accuracy of the GLT model (Tomasicchio et al., 2013) has been verified for the estimation of the Longshore Transport (LT) at shingle/mixed beaches. In order to verify the suitability of the GLT model in determining LT estimates at shingle beaches, without any further calibration, the comparison between the LT predictions and observations from two field data sets (Chadwick, 1989; Nicholls and Wright, 1991) has been considered. The comparison showed that the GLT predicted LT rates within a factor of 2 of the observed values. The predictive capability of the GLT has been also verified against an alternative general formula for the LT estimation at shingle beaches (Van Rijn, 2014). In addition, the suitability of the GLT model, even for the mixed beach case, has been assessed by means of the comparison between the LT prediction and the observation from a field experiment on a mixed sand and gravel beach at Hawke's Bay, on the east coast of New Zealand (Komar, 2010)
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
- …
