102,220 research outputs found
LA-IPM: linear algebra issues arising in interior point methods
No full textThe special issue of COAP, edited by J.Gondzio and G. Toraldo, collects contributions from some of the most expert researchers in the field of numerical optimizations, dealing with the impact of numerical linear algebra algorithms on the implementation of Interior point methods
To the special issue dedicated to the 3rd international conference "Numerical Computations: Theory and Algorithms-NUMTA 2019" June 15-21, 2019, Isola Capo Rizzuto, Italy
No full textRecent advances in nonlinear optimization and equilibrium problems: a tribute to Marco D'Apuzzo
No full textP2GP - Proportionality-based 2-phase Gradient Projection method
No full textP2GP is a MATLAB code for the solution of Quadratic Programming problems with a Single Linear constraint and Bounds on the variables (SLBQPs). The problems are not required to be strictly convex. The code implements the Proportionality-based 2-phase Gradient Projection method proposed in
D. di Serafino, G. Toraldo, M. Viola, J. Barlow, A two-phase gradient method for quadratic programming problems with a single linear constraint and bounds on the variables, SIAM Journal on Optimization, 28 (4), pp. 2809-2838, ISSN: 1052-6234, doi: 10.1137/17M1128538.
It also includes SLBQPgen, a generator of SLBQPs (and BQPs), described in Section 5.1 of the aforementioned article
Crafting social memory for international recognition: the role of place and tradition in an Italian silk-tie maker
No full textThis chapter focuses on the role of place and local history in building the brand identities of craft organizations. Recent research on craft organizations has focused on the local context as an important factor for identity recognition and distinctiveness. However, an important but understudied aspect of this relates to the organizational use of both the sense of place and history and how visions of the past are used to support and legitimate organizational operations. In this context, local history is not simply regarded as a timeline along which events come to pass, but as a symbolic and cultural artefact that organizational actors deliberately manage and construct.
Using the empirical case of an Italian high- end silk- tie maker, the chapter investigates how high prestige associated with ties draws from the past and the sense of place, which become salient components of the product brand itself. Drawing from the notion of social memory, we explore how material and cultural practices performed by the firm provide common cues for interpretation of the past. Our findings suggest the multifaceted and ambivalent ways in which the sense of place and tradition is deployed to create brand singularity, related to: 1) the specificities of the place – firmly embedded in the city of Naples, the image of the firm and that of the city become reciprocally reinforcing; 2) the family- owned tradition of the firm, particularly palpable in the sense of hospitality towards customers. We discuss the theoretical implications of our study in terms of understanding the ambivalence of the sense of place between creative context and chaotic or shabby site, and the ability of the firm to capitalize on a repository of social memories, commonly associated with local context specificitie
Il dualismo discreto continuo nella storia delle teorie matematiche della guerra
No full textAtti del V congresso Nazionale di Storia della Fisica (a cura di S. D'Agostino, S. Petruccioli
109. Coppola G., Auricchio G, Romagnolo G, Licciardi F, Toraldo C, Pascotto A. Levetiracetam as add-on therapy in children, adolescents, and young adults with refractory epilepsy: an open trial.
No full textMetamaterial-based Toraldo pupils for super-resolution at millimetre wavelengths
No full textUsing the long-established Cardiff metal-mesh filter technology, we have exploited our ability to artificially manipulate the phase of a wavefront across a device in order to produce a dielectric-based Toraldo pupil working at millimeter wavelengths. The use of a Toraldo pupil to push the angular resolution of an optical imaging system beyond the classical diffraction limit is yet to be realized in the millimeter regime, but is an exciting prospect. Here we present the design and measured performance of a prototype Toraldo pupil, based on a 5 annuli design
Numerical hints for insulation problems
No full textIn this work we analyze a problem of thermal insulation from the numerical point of view via finite element method. Physically, we are considering a domain of given temperature, thermally insulated by surrounding it with a constant amount of thermal insulator. From the mathematical point of view, this problem is composed by an elliptic partial differential equation with Robin–Dirichlet boundary conditions. Our question is related to the best (or worst) shape for the external domain, in terms of heat dispersion (of course, under prescribed geometrical constraints)
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