309 research outputs found
Grant Cardone International Sales Expert, Author & Coach
No full textGrant Cardone International Sales Expert, Author & Coach
GPU accelerated solution of time fractional diffusion systems
No full textFractional diffusion systems model a number of important applications, as for example water diffusion magnetic resonance imaging, since the biological tissues are heterogeneous and the signal exhibits a heavy tail which is characteristic of anomalous diffusion [3]. In this talk, we consider a time-fractional diffusion system discretized by a mixed method, consisting of a spectral method along time and a finite difference scheme along space [1]. As the spatial mesh becomes finer, the computational cost becomes very large and prevents getting high accuracy. In this context, our contribution is a suitable parallel implementation on GPUs (Graphics Processing Units) of this model. This massively multi-processors architecture has been recently used in several scientific applications to improve performance of software [4] and to get accurate and accelerated solutions in similar fractional diffusion problems [2]. Experiments show the gain of performance in execution time and accuracy terms of the parallel implementation.
References
[1] Burrage, K. and Cardone, A. and D’Ambrosio, R. and Paternoster, B. 2017 Numerical solution of time fractional diffusion systems, Appl. Numer. Math. 116, 82–94.
[2] De Luca, P., Galletti, A., Ghehsareh, H.R., Marcellino, L., & Raei, M. A gpucuda framework for solving a two-dimensional inverse anomalous diffusion problem.In: Foster, I., Joubert, G.R., Kučera, L., Nagel, W.E., Peters, F. (eds) Parallel Computing: Technology Trends, Advances in Parallel Computing. Vol 36. pp 311 -320. IOS Press, 2020.
[3] Höfling, F. and Franosch, T. 2013 Anomalous transport in the crowded world of biological cells, Rep. Prog. Phys. 76, 046602.
[4] Kurzak, J., Gates, M., Charara, A., YarKhan, A., Yamazaki, I., & Dongarra, J. (2019, August). Linear systems solvers for distributed-memory machines with gpu accelerators. In European Conference on Parallel Processing (pp. 495-506). Springer, Cham
Giuseppe Cardone, architetto regio
No full textIl breve saggio fornisce un profilo dell'attività dell'architetto Cardone, fra l'altro attivo presso il castello di Govone, tra periodo Napoleonico e Restaurazion
Un’attrice che scrive. Maria Denis e Luchino Visconti in Il gioco della verità
No full textNell'ambito di un volume incentrato sui Gender e sui Cultural Studies, il saggio indaga la figura di Maria Denis, attrice nel cinema del Ventennio, a partire dallo scritto autobiografico Il gioco della verità (1995). Nelle pagine di questa riflessione a posteriori, Denis riflette sul cinema, sull'Italia fascista, sul rapporto col regime e sulla improvvisa, traumatica, consapevolezza della dittatura. Al centro del memoir si staglia la figura di Luchino Visconti, della Roma occupata dai tedeschi, e dell'impegno della giovane attrice per salvare la vita al regista-partigiano. L'analisi di questo breve volume testimonia la ricchezza degli scritti delle attrici, indagati dal progetto PRIN DaMA da cui il saggio discende, sia come fonti di storia, sia come potenti sintomi di una soggettività femminile nuova e a suo modo imprevista
Modulation Transfer-function Cascade Model For A Sampled Ir Imaging-system
No full textThe performance of the infrared scanning radiometer (IRSR) is strongly stressed in convective heat transfer applications where high spatial frequencies in the signal that describes the thermal image are present. The need to characterize more deeply the system spatial resolution has led to the formulation of a cascade model for the evaluation of the actual modulation transfer function of a sampled IR imaging system. The model can yield both the aliasing band and the averaged modulation response for a general sampling subsystem. For a line scan imaging system, which is the case of a typical IRSR, a rule of thumb that states whether the combined sampling-imaging system is either imaging-dependent or sampling-dependent is proposed. The model is tested by comparing it with other noncascade models as well as by ad hoc measurements performed on a commercial digitized IRSR
WHOO - WSN Hybrid rOuting prOtocol
No full textUbiquitous smart environments equipped with low-cost and easily-deployable wireless sensor networks (WSNs) and ever-increasing widespread Mobile Ad hoc NETworks (MANETs) are opening brand new opportunities in environmental monitoring. This paper proposes an original solution for WSN/MANET integration based on the primary design guideline of opportunistically exploiting MANET overlays impromptu formed over the WSN to improve and boost the data collection task of a typical WSN. On the one hand, we adopt a cross-layer approach that exploits MANET connections to differentiate and fasten the delivery of sensed urgent data by pushing them over low-latency MANET paths. On the other hand, we take advantage of local cross-layer visibility of the WSN data collection procedures and protocols to carefully control and limit WSN–MANET coordination overhead. We claim that our proposed solution can obtain significant quality of service improvements via differentiation, by granting faster delivery times to urgent data with a very limited cost in most common execution scenarios
Activation of ?-Catenin by Oncogenic PIK3CA and EGFR Promotes Resistance to Glucose Deprivation by Inducing a Strong Antioxidant Response
No full textGlucose is an essential fuel for cell survival and its availability limits aberrant cellular proliferation. We have hypothesized that specific cancer mutations regulate metabolic response(s) to glucose deprivation (GD). By means of somatic knock-in cellular models, we have analyzed the response to glucose deprivation in cells carrying the frequent (delE746-A750)EGFR, (G13D)KRAS or (E545K)PIK3CA cancer alleles. We demonstrate that, in mammary epithelial cells, glucose has an essential antioxidant function and that these cells are very sensitive to GD. Conversely, isogenic cells carrying the (delE746-A750)EGFR or the (E545K)PIK3CA, but not the (G13D)KRAS allele, display high tolerance to GD by stimulating the expression of anti-oxidant genes (MnSOD and catalase). This adaptive transcriptional response is mediated by the activation of WNT/β-catenin and FOXO4 signalling. Our data highlights a new functional synergism between oncogenic EGFR and PIK3CA with WNT/β-catenin conferring high tolerance to oxidative stress generated by nutrient deprivation
Spazio urbano e relazioni territoriali di un insediamento della Puglia medievale: applicazioni digitali nell’indagine archeologica in corso a Montecorvino
No full textAnalisi spaziali e di archeologia diagnostica suln sito archeologico fi montecorvin
MSF: An Efficient Mobile Phone Sensing Framework
No full textRecent evolutions in smartphones, today provided with several sensors, have the strong processing capabilities needed to extract from raw sensed data sensor meaningful high-level views of the physical context around the user. A new promising research area called mobile sensing promotes completely decentralized sensing based on smartphone capabilities only. However, current mobile sensing solutions are not very mature; yet, because they are based on ad hoc software solutions tailored to one specific technical problem (e.g., power management, resource locking, etc.), they are difficult to reuse and integrate in different projects, and they do not focus on the performance efficiency of the monitoring support. To overcome those limitations, this paper proposes Mobile Sensing Framework (MSF), a flexible platform to ease the development of mobile sensing applications through the definition of a common set of facilities that mask all low-level technical details in reading and processing raw sensor data. MSF has been optimized also to enhance performances for Android-based systems, and we report an extensive set of experimental results that assess our architecture and quantitatively compare it with a selection of other mobile sensing systems by showing that MSF outperforms them by presenting lower CPU usage and memory footprints
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