775 research outputs found
Towards understanding the antibacterial activity of Ag nanoparticles: electron microscopy in the analysis of the materials-biology interface in the lung
MEDAL: An AI-Driven Data Fabric Concept for Elastic Cloud-to-Edge Intelligence
Current Cloud solutions for Edge Computing are inefficient for data-centric
applications, as they focus on the IaaS/PaaS level and they miss the data
modeling and operations perspective. Consequently, Edge Computing opportunities
are lost due to cumbersome and data assets-agnostic processes for end-to-end
deployment over the Cloud-to-Edge continuum. In this paper, we introduce MEDAL,
an intelligent Cloud-to-Edge Data Fabric to support Data Operations
(DataOps)across the continuum and to automate management and orchestration
operations over a combined view of the data and the resource layer. MEDAL
facilitates building and managing data workflows on top of existing flexible
and composable data services, seamlessly exploiting and federating
IaaS/PaaS/SaaS resources across different Cloud and Edge environments. We
describe the MEDAL Platform as a usable tool for Data Scientists and Engineers,
encompassing our concept and we illustrate its application though a connected
cars use case
Magnetic Resonance Spectroscopy of the Breast at 3T: Pre- and Post-Contrast Evaluation for Breast Lesion Characterization
Purpose. To determine whether in vivo proton magnetic resonance spectroscopy at 3T can provide accurate breast lesion characterization, and to determine the effect of gadolinium on the resonance of tCho. Methods. Twenty-four positive-mammogram patients were examined on a 3T MR scanner. 1H-MRS was performed before and after gadolinium administration. tCho peak was qualitatively evaluated before and after contrast injection. Results. Fourteen out of 27 lesions proved to be malignant after histopathological diagnosis. Using 1H-MRS, before contrast injection, 6/14 confirmed malignancies and 11/13 benign lesions were correctly classified; while, after contrast injection, 11/14 confirmed malignancies and 12/13 benign processes were correctly classified. Post gadolinium 1H-MRS proved useful in picking up tCho signal, improving the overall accuracy, sensitivity, and specificity by 35%, 83%, and 9%, respectively. Conclusion. 1H-MRS overall accuracy, sensitivity, and specificity in detecting breast lesion's malignancy were increased after gadolinium administration. It is prudent to perform 1H-MRS before contrast injection in large breast lesions to avoid choline underestimation. In cases of small or non-mass lesions, it is recommended to perform 1H-MRS after contrast injection for better voxel prescription to enable a reliable preoperative diagnosis
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