Control of Five Phase Doubly Fed Induction Machines for Motion and Contactless Power Transmission

In questa tesi si mostra come un motore a induzione di tipo doubly fed (DFIM) possa assolvere contemporaneamente le funzioni di motore e di trasmissione di potenza In particolare questa peculiarità è particolarmente utile laddove sia necessario alimentare dei dispositivi elettrici a bordo di una macchina automatica a giostra, normalmente alimentati tramite contatti striscianti: da quest’ultimi infatti spesso derivano innumerevoli problematiche di usura e sicurezza. In particolare, in questa tesi verrà trattato un azionamento pentafase: tale scelta è stata dettata dalla possibilità di disaccoppiare la trasmissione di potenza elettrica e quella meccanica. Data la particolarità di tale macchina una lunga sezione è dedicata alla sua descrizione. Si presentano tre diverse metodologie di funzionamento e controllo della macchina doubly fed: in particolare le prime due, che si avvalgono di modulazioni di coppia o di potenza, potrebbero essere implementate anche su un motore trifase qualora risultasse conveniente; al contrario l’ultimo controllo proposto, che si fonda sull’utilizzo indipendente delle frequenze di statore, è applicabile solo a un DFIM pentafase. Dai risultati ottenuti in simulazione, ma comprendenti moltissimi gradi di realismo, appare evidente come quest’ultimo dia i risultati migliori e sfrutti al meglio la macchina pentafase

successful antiviral treatment of chronic hepatitis c in patients with rare comorbidities two case reports

Abstract Antiviral therapy in patients suffering from chronic hepatitis C virus (HCV) infection and rare comorbidities cannot be easily started, as it can reduce the likelihood of a good therapeutic response with an increased frequency of side effects. We report two patients presenting unusual comorbidities associated with chronic C hepatitis: one with the Ehlers-Danlos Syndrome (EDS), a rare genetic disease caused by a defect in collagen synthesis, the other one with the Charcot Marie Tooth (CMT) disease, an uncommon but severe form of demyelinating peripheral neuropathy. Both patients were successfully treated with pegylated Interfe-ron (Peg-IFN) and ribavirin (RBV) combined therapy, with the achievement of a sustained viral response (SVR) and a low occurrence of adverse effects. Up to now there are no reports of patients suffering from chronic C hepatitis associated with these uncommon but severe comorbidities treated with antiviral therapy. In conclusion, in such clinical situations, anti-HCV therapy may be started and tailored, especially if the patient is highly motivated and if optimal predictors of response (i.e. young age, favourable genotype and low baseline viraemia) do exist

Beclomethasone/formoterol fixed combination for the management of asthma: patient considerations

Drugs for asthma and other chronic obstructive diseases of the lungs should be preferably delivered by the inhalation route to match therapeutic effects with low systemic exposure. Inhaled drugs are delivered to the lungs via different devices, mainly metered dose inhalers and dry powder inhalers, each characterized by specific inhaler technique and instructions for use. The patient–device interaction is part of the prescribed therapy and can have a relevant impact on adherence and clinical outcomes. The most suitable device should be considered for each patient to assure the correct drug intake and adherence to the prescribed therapy. The development of new drugs/devices in the past decades improved the compliance with inhaler and possibly drug delivery to the bronchi. The present review focuses on the recently developed beclomethasone/formoterol extrafine fixed combination and technical aspects of drug delivery to the lungs in patient’s perspective

Biological network analysis with CentiScaPe: centralities and experimental dataset integration

The growing dimension and complexity of the available experimental data generating biological networks have increased the need for tools that help in categorizing nodes by their topological relevance. Here we present CentiScaPe, a Cytoscape app specifically designed to calculate centrality indexes used for the identification of the most important nodes in a network. CentiScaPe is a comprehensive suite of algorithms dedicated to network nodes centrality analysis, computing several centralities for undirected, directed and weighted networks. The results of the topological analysis can be integrated with data set from lab experiments, like expression or phosphorylation levels for each protein represented in the network. Our app opens new perspectives in the analysis of biological networks, since the integration of topological analysis with lab experimental data enhance the predictive power of the bioinformatics analysis

Short term efficacy of nebulized beclomethasone in mild-to-moderate wheezing episodes in pre-school children

<p>Abstract</p> <p>Background</p> <p>Few data are available on the usefulness of short term treatment with low-medium dose of inhaled corticosteroids (ICS) in pre-school children with wheezing exacerbations.</p> <p>Methods</p> <p>To compare the efficacy of one week treatment with 400 μg b.i.d. nebulized beclomethasone dipropionate (BDP), plus nebulized 2500 μg prn salbutamol (BDP group), versus nebulized b.i.d. placebo, plus nebulized prn 2500 μg salbutamol (placebo group), a post-hoc analysis was performed on data obtained in 166 pre-school children with multiple-trigger wheezing, recruited during an acute wheezing episode.</p> <p>Results</p> <p>The percentage of symptom-free days (SFDs) was significantly higher in the BDP group (54.7%) than in the placebo group (40.5%; p = 0.012), with a 35% relative difference. Day-by-day analysis showed that the percentage of SFDs was already higher in the BDP group after 2 days (7.4%), the difference reaching statistical significance at day 6 (12.3%; p = 0.035). Cough score was also reduced in the BDP group (0.11) as compared with the placebo group (0.39; p = 0.048), the difference reaching statistical significance after 5 days of treatment (0.18 and 0.47 respectively; p = 0.047). The mean number of nebulizations per day of prn salbutamol was lower in the BDP group as compared to the placebo group (0.26 and 0.34, respectively), but the difference was not significant (p = 0.366). There were no differences in positive effects of BDP treatment between children with and without risk factors for asthma.</p> <p>Conclusions</p> <p>A 1-week treatment with nebulized BDP and prn salbutamol is effective in increasing SFDs and improving cough in children with wheezing, providing a clinical rationale for the short term use of ICS in episodic wheeze exacerbations in pre-school children.</p> <p>Trial Registration</p> <p>ClinicalTrials.gov (<a href="http://www.clinicaltrials.gov/ct2/show/NCT00497523">NCT00497523</a>)</p

Spectroscopic techniques applied to the study of Italian painted Neolithic Potteries

In the field of cultural heritage, the study of the materials used by the artist is useful both for the knowledge of the artwork and for conservation and restoring interventions. In this communication, we present results of some decorations analysis obtained by the use of two complementary laser techniques: micro-LIBS and micro-Raman spectroscopy. With both techniques it is possible to operate in a practically nondestructive way on the artwork itself, without sampling or pretreatment. Micro-Raman spectroscopy gives information on the molecular structure of the pigments used, while micro-LIBS can give quantitative information about the elemental composition of the same materials. In this paper, qualitative results are reported obtained on the study of some Neolithic potteries coming from the archaeological site of Trasano (Matera); the fragments show decorations in different colors, red, black, and white. The aim of the study was detecting whether the colored decorations were made by using added pigments or came from the manufacturing process

Mapping Cortical Degeneration in ALS with Magnetization Transfer Ratio and Voxel-Based Morphometry

Pathological and imaging data indicate that amyotrophic lateral sclerosis (ALS) is a multisystem disease involving several cerebral cortical areas. Advanced quantitative magnetic resonance imaging (MRI) techniques enable to explore in vivo the volume and microstructure of the cerebral cortex in ALS. We studied with a combined voxel-based morphometry (VBM) and magnetization transfer (MT) imaging approach the capability of MRI to identify the cortical areas affected by neurodegeneration in ALS patients. Eighteen ALS patients and 18 age-matched healthy controls were examined on a 1.5T scanner using a high-resolution 3D T1 weighted spoiled gradient recalled sequence with and without MT saturation pulse. A voxel-based analysis (VBA) was adopted in order to automatically compute the regional atrophy and MT ratio (MTr) changes of the entire cerebral cortex. By using a multimodal image analysis MTr was adjusted for local gray matter (GM) atrophy to investigate if MTr changes can be independent of atrophy of the cerebral cortex. VBA revealed several clusters of combined GM atrophy and MTr decrease in motor-related areas and extra-motor frontotemporal cortex. The multimodal image analysis identified areas of isolated MTr decrease in premotor and extra-motor frontotemporal areas. VBM and MTr are capable to detect the distribution of neurodegenerative alterations in the cortical GM of ALS patients, supporting the hypothesis of a multi-systemic involvement in ALS. MT imaging changes exist beyond volume loss in frontotemporal cortices

A Prospective Cohort Analysis of the Prevalence and Predictive Factors of Delayed Discharge After Laparoscopic Cholecystectomy in Italy: The DeDiLaCo Study

Background: The concept of early discharge ≤24 hours after Laparoscopic Cholecystectomy (LC) is still doubted in Italy. This prospective multicentre study aims to analyze the prevalence of patients undergoing elective LC who experienced a delayed discharge &gt;24 hours in an extensive Italian national database and identify potential limiting factors of early discharge after LC. Methods: This is a prospective observational multicentre study performed from January 1, 2021 to December 31, 2021 by 90 Italian surgical units. Results: A total of 4664 patients were included in the study. Clinical reasons were found only for 850 patients (37.7%) discharged &gt;24 hours after LC. After excluding patients with nonclinical reasons for delayed discharge &gt;24 hours, 2 groups based on the length of hospitalization were created: the Early group (≤24&nbsp;h; 2414 patients, 73.9%) and the Delayed group (&gt;24&nbsp;h; 850 patients, 26.1%). At the multivariate analysis, ASA III class ( P &lt;0.0001), Charlson's Comorbidity Index (P=0.001), history of choledocholithiasis (P=0.03), presence of peritoneal adhesions (P&lt;0.0001), operative time &gt;60&nbsp;min (P&lt;0.0001), drain placement (P&lt;0.0001), pain ( P =0.001), postoperative vomiting (P=0.001) and complications (P&lt;0.0001) were independent predictors of delayed discharge &gt;24 hours. Conclusions: The majority of delayed discharges &gt;24 hours after LC in our study were unrelated to the surgery itself. ASA class &gt;II, advanced comorbidity, the presence of peritoneal adhesions, prolonged operative time, and placement of abdominal drainage were intraoperative variables independently associated with failure of early discharge