201 research outputs found
Editorial: Pulmonary fibrosis: One manifestation, various diseases
No full textThis research topic collection entitled “Pulmonary Fibrosis: one manifestation, various diseases”, involving authors from different countries, confirms that this disease is a hot topic (Confalonieri P et al.,2022, Orlandi M et al., 2022). There are over 200 different types of pulmonary fibrosis (PF), the most common is the idiopathic pulmonary fbrosis (IPF), called idiopathic because it has no known cause. Another rare form is familial PF, for which several studies reported correlation with few genes. An important group of PF are due to other diseases, for example, autoimmune diseases such as rheumatoid arthritis, systemic sclerosis or Sjogren’s syndrome (Ruaro et al., 2022, Trombetta AC et al., 2017, Bernero Eet al., 2013). PF could correlate to viral infections (e.g. COVID-19), gastroesophageal reflux disease (GERD) (Baratella E et al, 2021, Ruaro et al., 2018), and the exposure to various materials (including naturally occurring such as bird or animal droppings, and occupational such as asbestos or silica). Furthermore, smoking, radiation treatments, and certain drugs can increase risk of developing PF
Una collezione di routines per la valutazione numerica di integrali in una e piu' dimensioni
No full textMonografie di Software Matematico N.18 - Istituto per le Applicazioni del Calcolo "Mauro Picone", C.N.R
Oriented-Control Lumped Model of a SOFC Stack: Thermal and Electrochemical Response to External Perturbations
No full textSolid oxide fuel cells (SOFCs) are considered a promising technology to be adopted as future possible solution for decentralised combined heat and power (CHP) production due to their high electrical efficiency, the high temperature of generated heat and relative environmental advantages compared to traditional power generators. To operate a SOFC stack in an effective way, the control of some system operation parameters such as anode and cathode feeds, temperature or power output is mandatory. A deep knowledge of transient behaviour is a key requirement to get fuel cell plants ready for an industrial development. In this paper, a 1 kWe SOFC stack is modelled and a possible control strategy is proposed to provide rapid system response to perturbations. Fuel cell stack model has been designed for an eventual implementation of a control system and verified with experimental results from FCLab - University of Perugia. The model has been implemented using the commercial software package MATLAB/Simulink. As a result of an external perturbation of steady state conditions, the fuel cell stack control system has to regulate temperature, partial pressure and utilization of flows to avoid degradation of the stack performance
Digital Tomosynthesisvs Digital Chest Radiography in the Diagnosis of Lung Parenchyma Alterations:Preliminary Clinical Experience and Assessment of Diagnostic Confidence andAccuracy
No full textA closer look to the sgoldstino interpretation of the diphoton excess
No full textAbstract: We revisit the sgoldstino interpretation of the diphoton excess in the context of gauge mediation. While the bound on the gluino mass might seem to make the sgoldstino contribution to the diphoton excess unobservable, we show that the interpretation is viable in a thin, near critical region of the parameter space. This regime gives rise to drastic departures from the standard gauge mediation picture. While the fermion messengers lie in the (10-100) TeV range, some scalar messengers are significantly lighter and are responsible for the sgoldstino production and decay. Their effective coupling to the sgoldstino is correspondingly enhanced, and a non-perturbative regime is triggered when light and heavy messenger masses differ by a factor ≳ 4π. We also comment on the possible role of an R-axion and on the possibility to decouple the sfermions in this context. © 2016, The Author(s)
Digital Tomosynthesis vs Digital Chest Radiography in the Diagnosis of LungParenchyma Alterations: Preliminary Clinical Experience and Assessment of DiagnosticConfidence and Accuracy
No full textA track finding algorithm based on pixel detector for the ATLAS second level trigger
No full textA fast track reconstruction algorithm for the ATLAS second level trigger is presented. The timing performance (3.5 ms for a jet reconstruction at low luminosity) is satisfactory; the transverse impact parameter resolution (75 mu m) is sufficient to perform an on- line b-tagging, and the full three-dimensional reconstruction produces good seeds for more sophisticated track searches. (4 refs)
Enucleoresezione di tumori neuroendocrini pancreatici. Venticinque anni di esperienza
No full textAbstract
From 1980 to 2004, out of 109 patients who underwent surgery for neuroendocrine pancreatic tumor, 33 had a simple tumor excision. Seventy-two percent of cases were insulinomas. Age, sex, site and size of the tumor, associated diseases, hospital stay and complications were retrospectively reviewed by the clinical records. Patients (12 males and 21 females) averaged 56.8 years, range 20-86. Mean size of the tumor was 1.7 cm and 54.5% were in the pancreatic head; 78.8% of cases had medical associated diseases. Hospital stay was 12 days (median; range, 6-81 days) and mean period of gastric suction was 4 days. Forty-eight percent had a uneventful postoperative course. Complications were divided in early (related to pancreatic surgery, related to general open surgery and medical) and late events. Complication related to pancreatic surgery were 6/33 (18%); 5 pancreatic fistulas (4 low output) and 1 acute pancreatitis, while 5/33 had a general surgery complication (2 leacking due to gastric and duodenal associated operations). Medical complications were recorded in 13 cases. Late complications occurred in 4 cases (2 incisional hernias, 1 pseudocyst and 1 keloid). No patient was re-operated for pancreatic complications; 1 was reoperated for evisceration and 1 for hyper-parathyroidism in the early post-operative period. No mortality occurred. Re-evaluation of the clinical records in order to be submitted to laparoscopic surgery excluded 17/33 cases (51%) as candidate to laparoscopic approach
A methodology for assessing fuel cell performance under a wide range of operational conditions: Results for a molten carbonate single cell
No full textTesting the performance of fuel cells is an important key for verifying the technology improvements and for demonstrating their potential. However, due to the novelty of this technology, there is not a standardized procedure for testing fuel cell performance. In order to fully investigate a fuel cell performance, the behavior must be known in a wide range of operational conditions.. Furthermore, in order to compare results coming from different test teams, it should be defined a set of procedures and parameters to evaluate Single Cell performances. The research group of the Fuel Cell Laboratory of University of Perugia is performing performance test on single cells, focusing its attention on definition of test procedures to find effective parameters to be used for comparing tests made by different teams, also on different kind of cells. This work is about to demonstrate how the testing parameters developed by the team allow to perform an advanced control on test procedures, to understand test results in an easy way and also to compare them with tests executed in different operational conditions. Experimental results conducted on a single fuel cell are reported. The importance of fuel utilization factor and fuel humidification factor is stressed for their importance in the interpretation of the results
- …
