87,892 research outputs found
Individual Base Community model: Partitioning Model in ModMED: Modeling Mediterranean Ecosystem Dynamics
No full textS. MAZZOLENI AND C.J. LEGG (EDS
A Model for the Evaluation Trends Performance in Small and Medium Enterprises.
No full textThe purpose is to propose a model thanks to which the management, the owners and the stakeholders could assess the evolution in time of small and medium-sized enterprises’ state of health, in terms of different criteria during the considered three year period.
For this purpose, our framework is represented by a model developed in the previous publication (Giacosa and Mazzoleni, forthcoming), which distinguishes small and medium-sized enterprises into several typologies, in terms of above-mentioned criteria.
The originality of the research is consistent to the current context in which the companies operate, which is changing in a intensive way because of the world financial crisis. In particular, the company manifests the need to understand its situation and be encouraged to adopt a series of measures to improve its situation. Concluding, the companies could commit themselves to undertake a path toward virtuous positions, after determining the current starting condition
On the Dimension of the Singular Set in Optimization Problems with Measure Constraint
No full textWe prove estimates on the dimension of the singular part of the free boundary for solutions to shape optimization problems with measure constraint. The focus is on the heat conduction problem studied by Aguilera, Caffarelli, and Spruck and the one-phase Bernoulli problem with measure constraint introduced by Aguilera, Alt and Caffarelli. To estimate the Hausdorff dimension of the singular set, we introduce a new formulation of the notion of stability for the one-phase problem along volume-preserving variations, which is preserved under blow-up limits. Finally, the result follows by applying the program recently published by G. Buttazzo, F. P. Maiale, D. Mazzoleni, G. Tortone and B. Velichkov [Regularity of the optimal sets for a class of integral shape functionals, arxiv 2212.09118 (2022)] to this class of domain variation
A new numerical test for quantifying microgravity-induced bone alterations in cosmonauts
No full textOne of the most important alterations that occur in man and experimental animals during spaceflight affects the skeletal system (trabecular compartment of load-bearing bones), and results from an important bone loss and mechanical properties decay. The macro-scale mechanical properties of cancellous bone derive from its mass (composition and mineral content) and from its complex micro-scale structure (trabecular micro-architecture arrangement), and it is widely accepted that both these factors contribute to determine the mechanical strength of the whole bone [1]. In space research, bone quality changes due to unloading, are usually assessed by measuring bone density. More rarely, 3D micro-imaging, complemented by morphological indexes, has been used [2,3]. A software that, by means of numerical simulations, evaluates the load bearing capabilities of trabecular bone from planar radiographic images, has recently been developed at the University of Trieste [4]. The technique, already proved to be able to classify the quality of bone for the evaluation of fracture risk in osteoporotic patients [5,6], is here proposed for a more effective monitoring of bone quality changes in long duration spaceflight.
References
1. Kleerekoper, M. et al., “The role of three dimensional trabecular microstructure in the pathogenesis of vertebral compression fractures”, Calcif Tissue Int, Vol. 37, pp. S594-S597, 1985.
2. Vico, L. et al., “Effects of gravitational changes on the bone system in vitro and in vivo”, Bone, Vol. 22, pp. 95-100, 1998.
3. Lang, T. et al., “Cortical and trabecular bone mineral loss from the spine and hip in long duration spaceflight”, J Bone and Mineral Research, Vol. 19, pp. 1006-1012, 2004.
4. Patent: USA No. 10509512, deposited by University of Trieste, 2008.
5. Cosmi F., Dreossi D., “The Application of the Cell Method in a Clinical Assessment of Bone Fracture Risk”, Acta of Bioengineering & Biomechanics, Vol. 9, pp. 35-39, 2007.
6. Cosmi F., Mazzoleni G., “Un nuovo metodo strutturale per la valutazione del rischio di frattura nelle malattie degenerative”, 41° Convegno AIAS, Vicenza (I), Sept. 5-8, 2012
Martirii creştini. Dosar (I). Introducere
No full textAlle origini del culto dei martiri e del fenomeno delle persecuzion
Martirii creştini. Dosar (III). Scene de martiriu.
No full textLe più antiche scene di martiri nelle catacombe
Nuovo sistema di monitoraggio delle temperature dei laboratori
No full textDopo diversi anni di servizio del vecchio sistema Labview, è stato installato e configurato un nuovo sistema di monitoraggio delle temperature dei laboratori (Forza, Accelerazione, Durezze) all’interno del padiglione Bray. Il nuovo sistema è basato su un datalogger che si occupa dell’acquisizione e memorizzazione dei dati coadiuvato da un server MySQL su cui sono replicati i risultati delle misure. La visualizzazione e ricerca dei dati è affidata ad un'interfaccia sviluppata utilizzando la piattaforma Grafana, oltre al software fornito dal costruttore del datalogger e il display presente a bordo dispositivo. Si è scelto di utilizzare la piattaforma Grafana in quanto la visualizzazione e ricerca dei valori misurati risultano più agevoli ed intuitivi, fornendo inoltre la possibilità di accesso remoto. Il sistema effettua una lettura ogni 2 minuti ed il valor medio viene salvato ogni 30 minuti sia sul dispositivo, sia nel database MySQL ospitato sul relativo server. Con questo intervallo di lettura si stima la saturazione della memoria del datalogger tra circa 35 anni, al termine del quale inizieranno ad essere sovrascritti i valori più vecchi
- …
