323,297 research outputs found
Stereoscopic PIV measurements and proper orthogonal decomposition of a supersonic axisymmetric base flow
No full textThe supersonic flow separating past a cylindrical afterbody generates a complex, compressible and highly turbulent flowfield. This flow models several realistic applications, such as the wake region behind projectiles, bullets and unpowered rockets. A blowdown-type supersonic wind tunnel built specifically for axisymmetric base flows, located at the University of Illinois at Urbana-Champaign, is used to investigate these base flows. The flow is studied here via non-time-correlated instantaneous velocity vector fields obtained using stereo particle image velocimetry (S-PIV). Two overlapping velocity vector fields are simultaneously acquired and stitched together to obtain a high-resolution velocity vector field of the full flow. Statistics derived from the measurements, including the mean velocities and turbulence statistics (such as the kinematic Reynolds stresses), are presented in order to study the overall flow organization and turbulence levels. The obtained data are also used to provide benchmark data for CFD simulation comparison. The in-plane velocity component data are validated against LDV and planar PIV data obtained previously in the same facility. In order to gain further insight into the global organization of the flow, proper orthogonal decomposition (POD) is performed. The energy convergence and the structures found in the eigenmodes are used to gain insight into the organization of the flow that may not be apparent by observation of the mean flow statistics or the instantaneous images. The resulting eigenmodes of the POD analysis indicate that there is a dominant global axial pulsing motion.Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2019-05-01The student, James Favale, accepted the attached license on 2017-04-25 at 11:50.The student, James Favale, submitted this Thesis for approval on 2017-04-25 at 11:55.This Thesis was approved for publication on 2017-04-25 at 18:07.DSpace SAF Submission Ingestion Package generated from Vireo submission #11039 on 2017-08-10 at 15:06:57Made available in DSpace on 2017-08-10T20:33:23Z (GMT). No. of bitstreams: 2
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Previous issue date: 2017-04-25Embargo set by: Colleen Fallaw for item 102831
Lift date: 2019-08-10T21:27:21Z
Reason: Author requested U of Illinois access only (OA after 2yrs) in Vireo ETD systemU of I Only Restriction Lifted for Item 102831 on 2019-08-11T09:15:35Z
Dalla dottrina alla giurisprudenza e ritorno
No full textIl contributo affronta il complesso problema dell'interazione fra dottrina e giurisprudenza nei diversi modelli giuridici europei
Nodal curves and polarizations with good properties
No full textIn this paper we deal with polarizations on a nodal curve C with smooth components. Our aim is to study and characterize a class of polarizations, which we call “good”, for which depth one sheaves on C reflect some properties that hold for vector bundles on smooth curves. We will concentrate, in particular, on the relation between the w̲-stability of OC and the goodness of w̲. We prove that these two concepts agree when C is of compact type and we conjecture that the same should hold for all nodal curves
Coherent systems and BGN extensions on nodal reducible curves
No full textLet (C,w) be a polarized nodal reducible curve. In this paper, we consider coherent systems of type (r,d,k) on C with k < r. We prove that the moduli spaces of -stable coherent systems stabilize for large α and we generalize several results known for the irreducible case when we choose a good polarization. Then, we study in detail the components of moduli spaces containing coherent systems arising from locally free sheaves
La Corte di Cassazione erige il mausoleo delle forme volontarie
No full textIl contributo commenta criticamente una importante decisione della S. Corte in materia di forme convenzionali, sotto i profili della revoca e dell'interpretazione del patto di forma
Rezension zu S. Pagliantini, Forma e formalismo nel diritto europeo dei contratti, Pisa, 2009
No full textIl contributo costituisce una recensione al libro di Pagliantini sul fenomeno del formalismo nell'ambito del diritto europeo
Recensione a S. SANGIORGI, Multiproprietà e funzione del contratto, Napoli, 1983
No full textIl contributo rappresenta una breve recensione del libro di Sangiorgi sulla figura della multiproprietà
On vector bundles over reducible curves with a node
No full textLet C be a curve with two smooth components and a single node, and let UC(w, r, X) be the moduli space of w-semistable classes of depth one sheaves on C having rank r on both components and Euler characteristic X. In this paper, under suitable assumptions,we produce a projective bundle over the product of the moduli spaces of semistable vector bundles of rank r on each component and we show that it is birational to an irreducible component of UC(w, r, X). Then we prove the rationality of the closed subset containing vector bundles with given fixed determinant
Violazione dell'obbligo d'informazione e responsabilità dell'avvocato. Nota a cass. 30 luglio 2004, n.14597
No full textIl contributo annota una importante decisione della S. Corte sulla responsabilità del professionista forense a seguito della violazione del dovere dell'avvocato di informare il cliente circa la sua posizione giuridica
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