3,907 research outputs found
Estany menor de la Pera i Monturull
No full textBoExcursió del 10 i 11 de juny de 1973. Itinerari: : Refugi dels 'Estanys de la Pera' - Coll de Claror - Pic de Perafita o Tossal de la Truita (2756 m.) - Estanys superior i inferior de la Péra - Tossal de la Cotilla o Sirvent - (2836 m.) - Port de la Perafita - Refugis dels 'Estanys de la Pera' - Arànse
Refugi dels 'Estanys de la Pera', a 2.333 m.
No full textBoExcursió del 22 i 23 de novembre de 1971. Itinerari: Refugi dels Estanys de la Pera - Cota 2700, cap al tossal de la Colilla - Arànser - Travesseres - Sanillers - Martine
Carbon fibre versus metal framework in full-arch immediate loading rehabilitations of the maxilla - a cohort clinical study
No full textFrameworks made of carbon fibre-reinforced composites (CFRC) seem to be a viable alternative to traditional metal frameworks in implant prosthodontics. CFRC provide stiffness, rigidity and optimal biocompatibility. The aim of the present prospective study was to compare carbon fibre frameworks versus metal frameworks used to rigidly splint implants in full-arch immediate loading rehabilitations. Forty-two patients (test group) were rehabilitated with full-arch immediate loading rehabilitations of the upper jaw (total: 170 implants) following the Columbus Bridge Protocol with four to six implants with distal tilted implants. All patients were treated with resin screw-retained full-arch prostheses endowed with carbon fibre frameworks. The mean follow-up was 22 months (range: 18â24). Differences in the absolute change of bone resorption over time between the two implant sides (mesial and distal) were assessed performing a MannâWhitney U-test. The outcomes were statistically compared with those of patients rehabilitated following the same protocol but using metal frameworks (control group: 34 patients with 163 implants â data reported in Tealdo, Menini, Bevilacqua, Pera, Pesce, Signori, Pera, Int J Prosthodont, 27, 2014, 207). Ten implants failed in the control group (6·1%); none failed in the test group (P = 0·002). A statistically significant difference in the absolute change of bone resorption around the implants was found between the two groups (P = 0·004), with greater mean peri-implant bone resorption in the control group (1 mm) compared to the test group (0·8 mm). Carbon fibre frameworks may be considered as a viable alternative to the metal ones and showed less marginal bone loss around implants and a greater implant survival rate during the observation period
Al cim del Monturull (2761 m.)
No full textBoExcursió del 10 i 11 de juny de 1973. Itinerari: : Refugi dels 'Estanys de la Pera' - Coll de Claror - Pic de Perafita o Tossal de la Truita (2756 m.) - Estanys superior i inferior de la Péra - Tossal de la Cotilla o Sirvent - (2836 m.) - Port de la Perafita - Refugis dels 'Estanys de la Pera' - Arànse
Dalt del Tossal de la Colilla o Sirvent (2836 m.)
No full textBoExcursió del 10 i 11 de juny de 1973. Itinerari: : Refugi dels 'Estanys de la Pera' - Coll de Claror - Pic de Perafita o Tossal de la Truita (2756 m.) - Estanys superior i inferior de la Péra - Tossal de la Cotilla o Sirvent - (2836 m.) - Port de la Perafita - Refugis dels 'Estanys de la Pera' - Arànse
Dalt del Tossal de la Colilla o Sirvent (2836 m.). A baix, pic de Serramitjana
No full textBoExcursió del 10 i 11 de juny de 1973. Itinerari: : Refugi dels 'Estanys de la Pera' - Coll de Claror - Pic de Perafita o Tossal de la Truita (2756 m.) - Estanys superior i inferior de la Péra - Tossal de la Cotilla o Sirvent - (2836 m.) - Port de la Perafita - Refugis dels 'Estanys de la Pera' - Arànse
Cim del Monturull (2761 m.). Al fons, el Cadí i el Pedraforca
No full textBoExcursió del 10 i 11 de juny de 1973. Itinerari: : Refugi dels 'Estanys de la Pera' - Coll de Claror - Pic de Perafita o Tossal de la Truita (2756 m.) - Estanys superior i inferior de la Péra - Tossal de la Cotilla o Sirvent - (2836 m.) - Port de la Perafita - Refugis dels 'Estanys de la Pera' - Arànse
Design and performance evaluation of a Linux HPC cluster
No full textIn this paper after a short theoretical introduction about modern techniques used inparallel computing, we report a case study related to the design and development of the Caliban Linux High Performance Computing cluster, carried out by the author in the High Performance Computing Laboratory of the University of L’Aquila. Finally we report some performance evaluation tests related to the Caliban cluster performed using HPL (High-Performance Linpack) benchmarks
Adhesive strength of the luting technique for passively fitting screw-retained implant-supported prostheses: an in vitro evaluation.
No full textPURPOSE: This in vitro study evaluated the adhesive strength of a technique to lute implant cylinders to metal frameworks in implant-supported prostheses and ensure a good passive fit. MATERIALS AND METHODS: Different height samples were tested: In group 1, implant cylinders were 5 mm long; in group 2, they were 10 mm long. A universal testing machine (Instron) was used to perform pullout tests. RESULTS: The luting technique provided enough adhesive strength for clinical use with greater adhesive strength in group 2 (mean pull-out strength: 2.85 kN in group 1 versus 3.79 kN in group 2). CONCLUSIONS: The luting technique provides enough adhesive strength for clinical use. Moreover, specimens with a larger surface for adhesion demonstrated higher adhesive strength compared with shorter specimens
Normalized eigenvectors of a perturbed linear operator via general bifurcation
No full textLet X be a real Banach space, A:X → X a bounded linear operator, and B:X → X a (possibly nonlinear) continuous operator. Assume that λ = 0 is an eigenvalue of A and consider the family of perturbed operators A + εB, where ε is a real parameter. Denote by S the unit sphere of X and let SA = S ∩ KerA be the set of unit 0-eigenvectors of A. We say that a vector x0 ∈ SA is a bifurcation point for the unit eigenvectors of A + εB if any neighborhood of (0, 0, x0) ∈ × × X contains a triple (ε, λ, x) with ε = 0 and x a unit λ-eigenvector of A + εB, i.e. x ∈ S and (A + εB)x = λx.
We give necessary as well as sufficient conditions for a unit 0-eigenvector of A to be a bifurcation point for the unit eigenvectors of A + εB. These conditions turn out to be particularly meaningful when the perturbing operator B is linear. Moreover, since our sufficient condition is trivially satisfied when KerA is one-dimensional, we extend a result of the first author, under the additional assumption that B is of class C
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