Search results for " Irregular"
showing 10 items of 54 documents
MAST-RT0 SOLUTION OF 3D NAVIER STOKES EQUATIONS ON UNSTRUCTURED MESHS. PRELIMINARY RESULTS IN THE LAMINAR CASE
2021
MAST-RT0 solution of 3D Navier Stokes equations in very irregular domains. Preliminary results in the laminar case
2021
A new numerical methodology to solve the 3D Navier-Stokes equations for incompressible fluids within complex boundaries and unstructured body-fitted tetrahedral mesh is presented and validated with three literature and one real-case tests. We apply a fractional time step procedure where a predictor and a corrector problem are sequentially solved. The predictor step is solved applying the MAST (Marching in Space and Time) procedure, which explicitly handles the non-linear terms in the momentum equations, allowing numerical stability for Courant number greater than one. Correction steps are solved by a Mixed Hybrid Finite Elements discretization that assumes positive distances among tetrahedr…
Self-Reported Restrictive Eating, Eating Disorders, Menstrual Dysfunction, and Injuries in Athletes Competing at Different Levels and Sports
2021
The purpose of this study was to investigate the prevalence of self-reported restrictive eating, current or past eating disorder, and menstrual dysfunction and their relationships with injuries. Furthermore, we aimed to compare these prevalences and associations between younger (aged 15–24) and older (aged 25–45) athletes, between elite and non-elite athletes, and between athletes competing in lean and non-lean sports. Data were collected using a web-based questionnaire. Participants were 846 female athletes representing 67 different sports. Results showed that 25%, 18%, and 32% of the athletes reported restrictive eating, eating disorders, and menstrual dysfunction, respectively. Higher ra…
A new shoreline change assessment approach for erosion management strategies
2022
Shoreline evolution studies are fundamental to assess the rate of beach accretion or retreatment. In the last years, researchers developed many methods with several techniques belonging to different disciplines and backgrounds. Nowadays, the Shoreline Change Analysis (SCA) is the most widespread method to assess shoreline evolution. In fact, the SCA is needed to perform management strategies able to respond to current erosion or potential future erosion problems. This paper presents a new approach using an automatic method for SCA with accuracy and speed improvements. Indeed, in the framework of the management of coastal erosion and to develop an adaptation plan to coastal hazards it is nec…
"A Detenção administrativa dos Estrangeiros irregulares na Itália e na União Europeia e o Direito humano fundamental à Liberdade privada e à ampla De…
2014
Na Itália, como em outros Estados da União Europeia, vem ocorrendo recentemente nos últimos anos o fenômeno da "detenção administrativa" dos cidadãos estrangeiros irregulares, bem como dos requerentes de asilo, a maioria proveniente da África, do Oriente Médio e da Península Balcânica. Esses imigrantes, pelo simples fato de terem ingressado irregularmente no território europeu, apesar da imigração ilegal não constituir delito, são privados da liberdade pessoal ou de circulação e permanência, sendo detidos pelas autoridades de segurança pública, às vezes sem a validação da autoridade jurisdicional, durante um período de tempo também muito prolongado, em determinados locais, formais ou inform…
Degree sequences of highly irregular graphs
1997
AbstractWe call a simple graph highly irregular if each of its vertices is adjacent only to vertices with distinct degrees. In this paper we examine the degree sequences of highly irregular graphs. We give necessary and sufficient conditions for a sequence of positive integers to be the degree sequence of a highly irregular graph.
Highly irregular graphs with extreme numbers of edges
1997
Abstract A simple connected graph is highly irregular if each of its vertices is adjacent only to vertices with distinct degrees. In this paper we find: (1) the greatest number of edges of a highly irregular graph with n vertices, where n is an odd integer (for n even this number is given in [1]), (2) the smallest number of edges of a highly irregular graph of given order.
Implications of terrain resolution on modeling rainfall-triggered landslides using a TIN- based model
2021
Abstract This study employs a distributed eco-hydrological-landslide model, the tRIBS-VEGGIE-Landslide, to evaluate the influence of terrain resolution on the hydro-geomorphological processes involved in slope stability analysis. The model implements a Triangulated Irregular Network (TIN) to describe the topography starting from a grid-DEM. Five grid-DEM resolutions of the case study basin, i.e., 10, 20, 30 and 70 m, are used to derive the corresponding TINs. The results show that using irregular meshes reduces the loss of accuracy with coarser resolutions in the derived slope distribution in comparison to slope distributions estimated from the original grid-based DEM. From a hydrological p…
Favoreggiamento dell’immigrazione irregolare vs. traffico di migranti: una dicotomia rilevante nell’interpretazione dell’art. 12 TUI? (Ragionando su …
2022
La sentenza costituzionale n. 63/2022 propone una lettura plurioffensiva delle aggravanti del favoreggiamento dell’immigrazione irregolare, che usa per distinguere, nella disciplina dell’art. 12 TUI, tra mero favoreggiamento, previsto al comma 1, e che consisterebbe in una condotta «individuale» e «altruistica», e traffico di migranti, che sarebbe previsto invece ai commi 3, 3-bis e 3-ter e che evocherebbe «scenari di coinvolgimento di organizzazioni criminali». In questo contributo si muovono alcune critiche a questa lettura, mostrando come essa, oltre a non essere necessaria allo scopo di mostrare l’incostituzionalità delle due aggravanti oggetto di censura (uso di servizi di trasporto in…
Numerical observations of turbulence structure modification in channel flow over 2D and 3D rough walls
2015
Abstract The effects of wall roughness on turbulence structure modifications were explored by numerical experiments, carried out using Large Eddy Simulation techniques. The wall geometry was made using an archetypal artificial method, thus to achieve irregular two- and three-dimensional shapes. The proposed roughness shapes are highly irregular and are characterised by high and small peaks, thus it can be considered a practical realistic roughness. Their effects are analysed comparing the turbulence quantities over smooth, 2D and 3D rough walls of fully developed channel flow at relatively low friction Reynolds number Re τ = 395 . Both transitional and fully rough regimes have been investig…