1,720,972 research outputs found
Assenza dell'incisivo centrale inferiore in un soggetto medievale proveniente dal cimitero normanno di San Lorenzo di Aversa (Caserta)
No full textSome remarks on the Schroedinger equation with a potential in L^r_tL^s_x
No full textWe study the dispersive properties of the linear Schr ̈odinger equation with a timedependent
potential V (t, x). We show that an appropriate integrability condition in space and time
on V , i.e. the boundedness of a suitable L^r
L^s
x norm, is sufficient to prove the full set of Strichartz
estimates. We also construct several counterexamples which show that our assumptions are optimal,
both for local and for global Strichartz estimates, in the class of large unsigned potentials V ∈ L^rL^s
On the wave equation associated to the Hermite and the twisted Laplacian
No full textThe dispersive properties of the wave equation u_{tt} + Au = 0 are considered, where A is either the Hermite operator −\Delta+ |x|^2 or the twisted Laplacian −(∇_x − iy)^2/2 − (∇_y + ix)^2/2. In both cases we prove optimal L^1 − L^∞ dispersive estimates. More generally, we give some partial results concerning the flows exp(itL^\nu) associated to fractional powers of the twisted Laplacian for 0 < \nu < 1
Morfologia e patologia ungueale della mummia umana di Val Senales (Alpi Orientali, Tirolo, età del Bronzo)
No full textUn caso di cisti disontogenetica extracranica in un maschio adulto delle necropoli medioevale di Teramo-Sant'Anna (VII-XII secolo d.C., Italia Centrale)
No full text
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
The wave equation on hyperbolic spaces
No full textWe study the dispersive properties of the wave equation associated with the shifted Laplace-Beltrami operator on real hyperbolic spaces and deduce new Strichartz estimates for a large family of admissible pairs. As an application, we obtain local well-posedness results for the nonlinear wave equatio
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