179,380 research outputs found
i partiti politici
No full textstudio sull'affermazione e la natura giuridica del partito politico attraverso un esame degli statuti
Rossano di Vaglio, santuario italico: cronaca e nuovi dati dalla campagna di scavo del 2024
No full textThe Gut Immune Barrier and the Blood-Brain Barrier: Are They So Different?
No full textIn order to protect itself from a diverse set of environmental pathogens and toxins, the body has developed a number of barrier mechanisms to limit the entry of potential hazards. Here, we compare two such barriers: the gut immune barrier, which is the primary barrier against pathogens and toxins ingested in food, and the blood-brain barrier, which protects the central nervous system from pathogens and toxins in the blood. Although each barrier provides defense in very different environments, there are many similarities in their mechanisms of action. In both cases, there is a physical barrier formed by a cellular layer that tightly regulates the movement of ions, molecules, and cells between two tissue spaces. These barrier cells interact with different cell types, which dynamically regulate their function, and with a different array of immune cells that survey the physical barrier and provide innate and adaptive immunity
(t, r)-Broadcast Domination in Networks
No full textWe study a recently introduced generalization of distance domination in graphs known as (t, r)Broadcast Domination: A set S of broadcasting vertices transmit a signal of initial strength t; the strength of the signal decays linearly along edges according to distance, that is, a vertex at a distance d < t from a broadcasting vertex u ∈ S receives a signal of strength t − d, for each u ∈ S. The goal is to determine a set S of broadcasting vertices of minimum size, which ensures that every vertex in the network receives a cumulative signal strength of at least r. In this paper, we initiate the study of the (t, r)-Broadcast Domination problem in general graphs. Our results include a general approximation algorithm and optimal polynomial time algorithms for cographs. Moreover, we consider graphs of bounded Neighborhood diversity (nd), and graphs of bounded Iterated type partition number (itp) and give: (i) a fixed parameter tractable (FPT) algorithm for (t, r)Broadcast Domination parameterized by nd; (ii) a FPT algorithm for (t, r)-Broadcast Domination parameterized by itp plus the solution size B = |S|; (iii) a FPT algorithm for (t, r)-Broadcast Domination parameterized by itp plus the demand r
Dependence of Electron-Impact Excitation Cross-Sections on the Initial Vibrational Quantum Number in H-2 and D2 Molecules - X(1)Sigma-G+-]B(1)Sigma-U+ and X(1)Sigma-G+-]C(1)Pi-U Transitions
No full textElectron-impact excitation cross sections have been calculated using the impact-parameter method for X1SIGMA(g)+-->B1SIGMA(u)+ and X1SIGMA(g)+-->C1PI(u) transitions for both H-2 and D2 molecules as a function of incident energy and of vibrational quantum number v(i). The results show that the cross sections initially increase monotonically with increasing v(i) and follow the opposite trend for higher v(i) values
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