Search results for "Trap"

A Shoreline model for breaking waves

2011

In order to simulate the wave motion and, in turn, the flow, within the nearshore region, in the last decades the derivation and the application of depth-integrated type of models have been widely investigated and developed. However, in such models, the problems of facing wave breaking and the moving shoreline are not trivial and therefore several approaches have been proposed. About wave breaking, approaches both based on the adoption of an artificial eddy viscosity Zelt (1991) and on the concept of roller Veeramony (2000), Karambas (2003), Musumeci (2005) have been implemented. As regards the shoreline boundary condition, a couple of numerical techniques have been mainly adopted, namely t…

Ventastega curonica and the origin of tetrapod morphology.

2008

The gap in our understanding of the evolutionary transition from fish to tetrapod is beginning to close thanks to the discovery of new intermediate forms such as Tiktaalik roseae. Here we narrow it further by presenting the skull, exceptionally preserved braincase, shoulder girdle and partial pelvis of Ventastega curonica from the Late Devonian of Latvia, a transitional intermediate form between the 'elpistostegids' Panderichthys and Tiktaalik and the Devonian tetrapods (limbed vertebrates) Acanthostega and Ichthyostega. Ventastega is the most primitive Devonian tetrapod represented by extensive remains, and casts light on a part of the phylogeny otherwise only represented by fragmentary ta…

Occiput-spine relationship: shoulders are more important than head.

2017

BACKGROUND:To understand the role of fetal spine position in determining a fetal head position at the time of birth and modality of delivery. PATIENTS AND METHODS: This was a multicenter prospective observational study. Fetal occiput and spine position were evaluated by intrapartum ultrasound. Eighty-six women were eligible for inclusion in the study. Occiput rotational movements and modality of delivery in relation to the fetal spine position were investigated. RESULTS: At the beginning of labor, fetal occiput was in a posterior position in 52.3% of cases and, in 81.5% of cases the spine was in an anterior transverse position. At birth, occiput and spine were both in an anterior position i…

GaN and SiC Device Characterization by a Dedicated Embedded Measurement System

2023

This work proposes a comparison among GaN and SiC device main parameters measured with a dedicated and low-cost embedded system, employing an STM32 microcontroller designed to the purpose. The system has the advantage to avoid the use of expensive laboratory measurement equipment to test the devices, allowing to obtain their behavior in operating conditions. The following KPIs (Key Performance Indicators) are measured and critically compared: threshold voltage, on-resistance and input capacitance. All the measurements are carried out in a short time interval and on a wide range of switching frequencies, ranging from 10 kHz to 1 MHz. This investigation is focused on the deviation of the figu…

Le cappelle della Madonna e dei Marinai nella chiesa dell’Annunziata a Trapani. Costruzione e architettura nel primo Cinquecento in Sicilia

2017

Il saggio affronta le problematiche connesse alla genesi e alla costruzione di due cappelle realizzate nella prima metà del XVI secolo nel medesimo complesso dell’Annunziata a Trapani. Attraverso una rilettura della documentazione superstite e l’osservazione delle incongruenze che entrambe le opere mostrano, si sono sviluppate nuove ipotesi sul ruolo dei committenti, sui progetti originali e sulle maestranze coinvolte. Le due cappelle rivelano una singolare contaminazione di linguaggi e il loro studio può agevolare la comprensione dei meccanismi e delle procedure attuate nell’isola, di fronte alla eterogeneità delle specializzazioni del cantiere e alla compresenza di linguaggi diversi (dal …

Guida naturalistica alle saline di Trapani e Paceco

2008

Coppia di saliere

2017

Le saliere, pregevoli esempi di suppellettili di uso profano, sono riferite a maestranze trapanesi della fine del XVII secolo The salt cellars, valuable examples of profane furnishings, refer to Trapani workers of the late seventeenth century

Calice con scene della Passione di Cristo

2017

Il calice in rame dorato, corallo e filigrana d'argento è riferito a maestranze trapanesi del 1698-1699 The goblet in gilded copper, coral and silver filigree refers to Trapani workers from 1698-1699

Deep Gaussian processes for biogeophysical parameter retrieval and model inversion

2020

Parameter retrieval and model inversion are key problems in remote sensing and Earth observation. Currently, different approximations exist: a direct, yet costly, inversion of radiative transfer models (RTMs); the statistical inversion with in situ data that often results in problems with extrapolation outside the study area; and the most widely adopted hybrid modeling by which statistical models, mostly nonlinear and non-parametric machine learning algorithms, are applied to invert RTM simulations. We will focus on the latter. Among the different existing algorithms, in the last decade kernel based methods, and Gaussian Processes (GPs) in particular, have provided useful and informative so…

Optical tweezing using tunable optical lattices along a few-mode silicon waveguide

2018

International audience; Fourteen years ago, optical lattices and holographic tweezers were considered as a revolution, allowing for trapping andmanipulating multiple particles at the same time using laser light. Since then, near-field optical forces have arousedtremendous interest as they enable efficient trapping of a wide range of objects, from living cells to atoms, in integrateddevices. Yet, handling at will multiple objects using a guided light beam remains a challenging task for current on-chipoptical trapping techniques. We demonstrate here on-chip optical trapping of dielectric microbeads and bacteria usingone-dimensional optical lattices created by near-field mode beating along a f…