Datacenter in a box: Test your sdn cloud-datacenter controller at home

Abstract-In the last years, the widespread of Cloud computing as the main paradigm to deliver a large plethora of virtualized services significantly increased the complexity of Datacenters management and raised new performance issues for the intra-Datacenter network. Providing heterogeneous services and satisfying users' experience is really challenging for Cloud service providers, since system (IT resources) and network administration functions are definitely separated. As the Software Defined Networking (SDN) approach seems to be a promising way to address innovation in Datacenters, the paper presents a new framework that allows to develop and test new OpenFlow-based controllers for Cloud Datacenters. More specifically, our framework enhances both Mininet (a well-known SDN emulator) and POX (a network controller written in python), with all the extensions necessary to experiment novel control and management strategies of IT and network resources

Definizione e realizzazione di un'architettura basata su protocollo SIP per la gestione di una rete di sensori ZigBee

Il lavoro che verrà illustrato in questa tesi è stato sviluppato all'interno del laboratorio di reti di telecomunicazioni del dipartimento di ingegneria dell'informazione ed ha come obiettivo quello di estendere i confini di una Wireless Sensor Network per Home Automation oltre la porta di casa e renderla gestibile anche da remoto. La rete di sensori utilizzata si basa sullo standard ZigBee e sul protocollo 802.15.4 ed entra in comunicazione con il mondo IP tramite un SIP Home Gateway. Il protocollo SIP fornisce un'infrastruttura ben consolidata che ci permette sia di controllare la rete di sensori inviando comandi (con una semantica di tipo richiesta/risposta) sia di notificare eventi (tramite una semantica sottoscrizione/notifica). Per accedere al gateway è sufficiente l'utilizzo di un comune SIP client: abbiamo dapprima utilizzato diversi software reperibili sul mercato garantendo la compatibilità all'indietro e successivamente, dato che questi non coprivano completamente la nostra sfera di interesse, ne è stato realizzato uno specializzato nella gestione degli eventi relativi alla domotica. La possibilità di effettuare richieste da un comune SIP client è un punto di forza della nostra archiettura dato che l'utente finale non sarà costretto a possedere un dispositivo apposito per la gestione della propria rete domotica, bensì potrà sfruttare un qualsiasi device con risorse sufficienti per eseguire un applicativo SIP. Per consentire la comunicazione da remoto tramite il proprio identificativo e per centralizzare le informazioni in un unico apparato in modo da svincolare le diverse terminazioni da compiti di gestione è stato installato e configurato un server SIP. Con l'utilizzo di Kamailio, ovvero il server SIP selezionato per i nostri scopi, la comunicazione non è più diretta e questo risulta particolarmente vantaggioso quando ci sono molti utenti che sono intenzionati a consultare i dati della rete domotica, poiché sarà il server stesso ad occuparsi della comunicazione, lasciando al gateway solo i compiti di raccolta e pubblicazione dei dati e di esecuzione e traduzione dei comandi ricevuti dal lato SIP verso la rete ZigBee

A synthetic sensor to report oxygen dynamics in yeast

Perceiving the environmental availability of oxygen is essential to most organisms on Earth. Plants and animals exploit the Cys/Arg branch of the N-degron pathway to attune selective proteolysis to oxygen availability, while this does not occur in the yeast Saccharomyces cerevisiae. We put forward that this was due to the lack in its proteome of key regulatory enzymes to oxidize N-terminal Cys to Cys-sulfinic acid. Indeed, we found that expressing thiol oxidase enzymes such as Plant Cysteine Oxidases (PCO) or the Cysteamine Dioxygenase (ADO) enzyme was enough to switch on the Cys/Arg N-degron pathway in yeast. Following-up we used the Dual Luciferase Oxygen Reporter (DLOR),a ratiometric construct based on the ubiquitin split system to monitor the activity of the pathway. The firefly luciferase module exposes a Cys N-degron typical of plant ERF-VII factors and its turnover was made O2-conditional by the sole co-expression of PCO or ADO. DLOR acts as a proxy of oxygen dynamics in cultures, which can be deployed towards the investigation of the activity of thiol oxidases from different organisms, screen for chemical inhibitors, and identify novel substrate proteins in living cells

Surgical management of acute pancreatitis in Italy: lessons from a prospective multicentre study

This study aimed to evaluate the surgical treatment of acute pancreatitis in Italy and to assess compliance with international guidelines.A series of 1173 patients in 56 hospitals were prospectively enrolled and their data analysed.Twenty-nine patients with severe pancreatitis underwent surgical intervention. Necrosectomy was performed in 26 patients, associated with postoperative lavage in 70\% of cases. A feeding jejunostomy was added in 37\% of cases. Mortality was 21\%. Of the patients with mild pancreatitis, 714 patients with a biliary aetiology were evaluated. Prophylactic treatment of relapses was carried out in 212 patients (36\%) by cholecystectomy and in 161 using a laparoscopic approach. Preoperative endoscopic retrograde cholangiopancreatography was associated with cholecystectomy in 83 patients (39\%). Forty-seven patients (22\%) were treated at a second admission, with a median delay of 31 days from the onset of pancreatitis. Eighteen patients with severe pancreatitis underwent cholecystectomy 37.9 days after the first admission. There were no deaths.The results indicate poor compliance with published guidelines. In severe pancreatitis, early surgical intervention is frequently performed and enteral feeding is seldom used. Only a small number of patients with mild biliary pancreatitis undergo definitive treatment (i.e. cholecystectomy) within 4 weeks of the onset of pancreatitis

Long term outcome of acute pancreatitis in Italy: Results of a multicentre study

Background: In Italy, no long-term studies regarding the natural history of acute pancreatitis have been carried out. Aim: To report the results of a follow-up on a large series of patients hospitalised for pancreatitis. Methods: Data of 631 patients admitted to 35 Italian hospitals were retrospectively evaluated 51.7 ± 8.4 months after discharge. Results: The average recovery time after mild or severe pancreatitis was 28.2 and 53.4 days respectively. Fourteen sequelae were not resolved and 9 cases required late surgical intervention. Eighty patients (12.7%) had a second hospital admission. Of the patients with mild biliary pancreatitis, 67.9% underwent a cholecystectomy. The overall incidence of relapse was 12.7%. Mortality was 9.8% and no death was related to pancreatitis. Three patients died from carcinoma of the pancreas. Conclusion: Reported recovery time after an attack of pancreatitis was longer than expected in the mild forms. The treatment of sequelae was delayed beyond one year after discharge. The incidence of relapse of biliary pancreatitis in patients not undergoing a cholecystectomy was low, due to endoscopic treatment. Mortality from pancreatic-related causes is low, but there is an association with malignant pancreatic or ampullary tumours not diagnosed during the acute phase of the illness

Long term outcome of acute pancreatitis in Italy: Results of a multicentre study

Background: In Italy, no long-term studies regarding the natural history of acute pancreatitis have been carried out. Aim: To report the results of a follow-up on a large series of patients hospitalised for pancreatitis. Methods: Data of 631 patients admitted to 35 Italian hospitals were retrospectively evaluated 51.7 \ub1 8.4 months after discharge. Results: The average recovery time after mild or severe pancreatitis was 28.2 and 53.4 days respectively. Fourteen sequelae were not resolved and 9 cases required late surgical intervention. Eighty patients (12.7%) had a second hospital admission. Of the patients with mild biliary pancreatitis, 67.9% underwent a cholecystectomy. The overall incidence of relapse was 12.7%. Mortality was 9.8% and no death was related to pancreatitis. Three patients died from carcinoma of the pancreas. Conclusion: Reported recovery time after an attack of pancreatitis was longer than expected in the mild forms. The treatment of sequelae was delayed beyond one year after discharge. The incidence of relapse of biliary pancreatitis in patients not undergoing a cholecystectomy was low, due to endoscopic treatment. Mortality from pancreatic-related causes is low, but there is an association with malignant pancreatic or ampullary tumours not diagnosed during the acute phase of the illness. \ua9 2013 Editrice Gastroenterologica Italiana S.r.l

A prospective multicentre survey on the treatment of acute pancreatitis in Italy

Background: The Italian Association for the Study of the Pancreas released a diagnostic and therapeutic algorithm for acute pancreatitis in 1999. Aim: This study focused on the analysis of the therapeutic approach for the treatment of acute pancreatitis in Italy. Patients: One thousand, one hundred and seventy-three patients were recruited: 1006 patients (85.8%) had mild acute pancreatitis (MAP) and 167 (14.2%) had the severe acute pancreatitis (SAP); 161 patients showed pancreatic necrosis at computed tomography; 121 patients (10.3%) had sequelae and 36 (3.1%) died. Results: Non-steroidal anti-inflammatory drugs and tramadol were used more frequently in patients with the MAP whereas opioids and the association schedules were used more frequently in patients with the SAP (P < 0.001). Gabexate mesilate was utilised in 831 out of 1173 patients (70.8%); in particular, gabexate mesilate was used in 70.6% patients with MAP and in 73.1% of those with SAP (P = 0.521). The duration of the drug administration was significantly shorter in those having MAP than in those having the SAP (P < 0.001). The antibiotics most frequently used for the prophylaxis against infection from pancreatic necrosis (43.1%) were carbapenems. Only a small number of patients received enteral nutrition (4.7%). Endoscopic retrograde cholangiopancreatography was carried out in 344 of the 1173 patients (29.3%). Surgery was performed in 48 with SAP (19 had elective biliary surgery and 29 had pancreatic surgery). Conclusions: The results of this survey indicate a lack of compliance with the guidelines which regard the indications mainly for interventional endoscopy and surgery. \ua9 2007 Editrice Gastroenterologica Italiana S.r.l

Diagnostic assessment and outcome of acute pancreatitis in Italy: Results of a prospective multicentre study. ProInf-AISP: Progetto informatizzato pancreatite acuta, Associazione Italiana Studio Pancreas, phase II

Background and aim: Up till now, only one study providing practically complete information on acute pancreatitis in Italy has been published. The aim of this prospective study was to evaluate the clinical characteristics, in terms of diagnostic assessment and outcome, of a large series of patients affected by acute pancreatitis in Italy. Materials and methods: The study involved 56 Italian centres, homogeneously distributed throughout the entire national territory. Each participating centre was furnished with an ad hoc software including 530 items along with subsequent collection, tabulation and quality control of the data. Results: One thousand five hundred and forty case report forms of patients affected by acute pancreatitis were collected but 367 of them (24%) were subsequently eliminated from the final analysis. Therefore, 1173 patients (581 females and 592 males) were recruited. Mean age of patients was 62.0 \ub1 18.2 years (95% confidence interval, 60.9-63.0). On the basis of Atlanta classification, 1006 patients (85.8%) were defined as mild and 167 (14.2%) as severe pancreatitis. Biliary forms represented the most frequent aetiological category (813 cases, 69.3%) while alcoholic forms only 6.6% (77 cases); the remaining aetiologies accounted for 7.1% (83 cases) while 200 cases (17.1%) remained without a definite aetiological factor. Complete recovery was achieved in 1016 patients (86.6%) whereas morphological sequelae were found in 121 patients (10.3%) and mortality in 36 patients (3.1%; 0.4% in mild and 19.2% in severe acute pancreatitis). Ultrasonography was largely utilised as a first line diagnostic tool in all patients, with valuable visualisation of the pancreas in 85% of patients. Computer tomography scan was also widely used, with 66.7% of exams in mild and 33.3% in severe pancreatitis. Patients affected by biliary pancreatitis presented more severe (p = 0.004) and necrotizing forms (p = 0.021). Mortality was significantly related (p < 0.001) with the extension of pancreatic necrosis and with an age of over 70 years. Body mass index presented significantly greater values in severe than in mild forms (p < 0.001). Conclusions: Association of creatinine serum level over 2 mg/dl with an abnormal chest X-ray showed a high significant correlation with a more severe outcome in terms of morphological sequalae and mortality (p = 0.0001). Acute pancreatitis in Italy more commonly presents biliary aetiology and favourable outcome with low rate of complications and mortality. From a cost-effectiveness standpoint, diagnostic approach to this disease needs to be better standardised. \ua9 2007

Long term outcome of acute pancreatitis in Italy: Results of a multicentre study

Background: In Italy, no long-term studies regarding the natural history of acute pancreatitis have been carried out. Aim: To report the results of a follow-up on a large series of patients hospitalised for pancreatitis. Methods: Data of 631 patients admitted to 35 Italian hospitals were retrospectively evaluated 51.7 ± 8.4 months after discharge. Results: The average recovery time after mild or severe pancreatitis was 28.2 and 53.4 days respectively. Fourteen sequelae were not resolved and 9 cases required late surgical intervention. Eighty patients (12.7%) had a second hospital admission. Of the patients with mild biliary pancreatitis, 67.9% underwent a cholecystectomy. The overall incidence of relapse was 12.7%. Mortality was 9.8% and no death was related to pancreatitis. Three patients died from carcinoma of the pancreas. Conclusion: Reported recovery time after an attack of pancreatitis was longer than expected in the mild forms. The treatment of sequelae was delayed beyond one year after discharge. The incidence of relapse of biliary pancreatitis in patients not undergoing a cholecystectomy was low, due to endoscopic treatment. Mortality from pancreatic-related causes is low, but there is an association with malignant pancreatic or ampullary tumours not diagnosed during the acute phase of the illness. © 2013 Editrice Gastroenterologica Italiana S.r.l