Search results for " Lamellar"
showing 10 items of 19 documents
Vectors and Vector Fields
2012
The purpose of this book is to explain in a rigorous way Stokes’s theorem and to facilitate the student’s use of this theorem in applications. Neither of these aims can be achieved without first agreeing on the notation and necessary background concepts of vector calculus, and therein lies the motivation for our introductory chapter.
La leggerezza del lamellare. Una realizzazione e un progetto
2009
L’articolo si propone di mostrare le nuove frontiere del Legno Lamellare armato, sia attraverso una Chiesa a Gioia Tauro, (che rimane la prima applicazione naz. con questa tecnologia) sia attraverso un concorso appalto a Caltagirone, ove si configurano con più attenzione le cognizioni tecnologiche finalizzate alla snellezza e leggerezza dei materiali sino al loro stato limite. Sono queste due realizzazioni che propongono le prime Chiese “aperte” poiché vetrate a luce libera creando un unicum tra esterno ed interno. La prima opera si confronta con una copertura a membrana di circa 1000 mq che rimane appoggiata all’esterno dell’Aula Cultuale, il cui filtro vetrato si pone a mediazione con l’a…
Dysfunction of Oskyddad causes Harlequin-type ichthyosis-like defects in Drosophila melanogaster.
2020
Prevention of desiccation is a constant challenge for terrestrial organisms. Land insects have an extracellular coat, the cuticle, that plays a major role in protection against exaggerated water loss. Here, we report that the ABC transporter Oskyddad (Osy)—a human ABCA12 paralog—contributes to the waterproof barrier function of the cuticle in the fruit fly Drosophila melanogaster. We show that the reduction or elimination of Osy function provokes rapid desiccation. Osy is also involved in defining the inward barrier against xenobiotics penetration. Consistently, the amounts of cuticular hydrocarbons that are involved in cuticle impermeability decrease markedly when Osy activity is reduced. …
Minimal unit vector fields
2002
We compute the first variation of the functional that assigns each unit vector field the volume of its image in the unit tangent bundle. It is shown that critical points are exactly those vector fields that determine a minimal immersion. We also find a necessary and sufficient condition that a vector field, defined in an open manifold, must fulfill to be minimal, and obtain a simpler equivalent condition when the vector field is Killing. The condition is fulfilled, in particular, by the characteristic vector field of a Sasakian manifold and by Hopf vector fields on spheres.
Volume, energy and generalized energy of unit vector fields on Berger spheres: stability of Hopf vector fields
2005
We study to what extent the known results concerning the behaviour of Hopf vector fields, with respect to volume, energy and generalized energy functionals, on the round sphere are still valid for the metrics obtained by performing the canonical variation of the Hopf fibration.
Transglutaminase-1 and Bathing Suit Ichthyosis: Molecular Analysis of Gene/Environment Interactions
2009
Problematiche di percorso e di collegamento: “una idea antica, buona per il futuro”
2011
Il legno fa parte della storia dell’uomo, della sua evoluzione sociale e culturale, fin dalle costruzioni su palafitte, che esprimono un’architettura primordiale fondata su due elementi strutturali fondamentali: colonna e architrave, verticale e orizzontale. È questa una idea antica, buona per il futuro, che vede e ricerca l’innovazione a partire dal gesto primordiale che gli antichi praticavano nel gettare un semplice tronco d’albero tra due sponde per oltrepassare un fiume. In questo senso, il legno ritorna ad essere il migliore materiale per la realizzazione di strutture di collegamento, di passerelle pedonali, come quella necessaria a “collegare” la Via Sacra nella Valle dei Templi di …
Novel mutations of the ABCA12, KRT1 and ST14 genes in three unrelated newborns showing congenital ichthyosis.
2022
Abstract Background Congenital ichthyosis (CI) is a heterogeneous group of genetic disorders characterized by generalized dry skin, scaling and hyperkeratosis, often associated to erythroderma. They are rare diseases, with overall incidence of 6.7 in 100,000. Clinical manifestations are due to mutations in genes mostly involved in skin barrier formation. Based on clinical presentation, CI is distinguished in non-syndromic and syndromic forms. To date, mutations of more than 50 genes have been associated to different types of CI. Cases presentation We report on three Italian unrelated newborns showing clinical signs compatible with different forms of CI of variable severity, namely Harlequin…