parallel parity games a multicore attractor for the zielonka recursive algorithm

Abstract Parity games are abstract infinite-duration two-player games, widely studied in computer science. Several solution algorithms have been proposed and also implemented in the community tool of choice called PGSolver, which has declared the Zielonka Recursive (ZR) algorithm the best performing on randomly generated games. With the aim of scaling and solving wider classes of parity games, several improvements and optimizations have been proposed over the existing algorithms. However, no one has yet explored the benefit of using the full computational power of which even common modern multicore processors are capable of. This is even more surprisingly by considering that most of the advanced algorithms in PGSolver are sequential. In this paper we introduce and implement, on a multicore architecture, a parallel version of the Attractor algorithm, that is the main kernel of the ZR algorithm. This choice follows our investigation that more of the 99% of the execution time of the ZR algorithm is spent in this module. We provide testing on graphs up to 20K nodes generated through PGSolver and we discuss performance analysis in terms of strong and weak scaling

Obeticholic acid for the treatment of non-alcoholic steatohepatitis: interim analysis from a multicentre, randomised, placebo-controlled phase 3 trial

Background Non-alcoholic steatohepatitis (NASH) is a common type of chronic liver disease that can lead to cirrhosis. Obeticholic acid, a farnesoid X receptor agonist, has been shown to improve the histological features of NASH. Here we report results from a planned interim analysis of an ongoing, phase 3 study of obeticholic acid for NASH. Methods In this multicentre, randomised, double-blind, placebo-controlled study, adult patients with definite NASH,non-alcoholic fatty liver disease (NAFLD) activity score of at least 4, and fibrosis stages F2–F3, or F1 with at least oneaccompanying comorbidity, were randomly assigned using an interactive web response system in a 1:1:1 ratio to receive oral placebo, obeticholic acid 10 mg, or obeticholic acid 25 mg daily. Patients were excluded if cirrhosis, other chronic liver disease, elevated alcohol consumption, or confounding conditions were present. The primary endpointsfor the month-18 interim analysis were fibrosis improvement (≥1 stage) with no worsening of NASH, or NASH resolution with no worsening of fibrosis, with the study considered successful if either primary endpoint was met. Primary analyses were done by intention to treat, in patients with fibrosis stage F2–F3 who received at least one dose of treatment and reached, or would have reached, the month 18 visit by the prespecified interim analysis cutoff date. The study also evaluated other histological and biochemical markers of NASH and fibrosis, and safety. This study is ongoing, and registered with ClinicalTrials.gov, NCT02548351, and EudraCT, 20150-025601-6. Findings Between Dec 9, 2015, and Oct 26, 2018, 1968 patients with stage F1–F3 fibrosis were enrolled and received at least one dose of study treatment; 931 patients with stage F2–F3 fibrosis were included in the primary analysis (311 in the placebo group, 312 in the obeticholic acid 10 mg group, and 308 in the obeticholic acid 25 mg group). The fibrosis improvement endpoint was achieved by 37 (12%) patients in the placebo group, 55 (18%) in the obeticholic acid 10 mg group (p=0·045), and 71 (23%) in the obeticholic acid 25 mg group (p=0·0002). The NASH resolution endpoint was not met (25 [8%] patients in the placebo group, 35 [11%] in the obeticholic acid 10 mg group [p=0·18], and 36 [12%] in the obeticholic acid 25 mg group [p=0·13]). In the safety population (1968 patients with fibrosis stages F1–F3), the most common adverse event was pruritus (123 [19%] in the placebo group, 183 [28%] in the obeticholic acid 10 mg group, and 336 [51%] in the obeticholic acid 25 mg group); incidence was generally mild to moderate in severity. The overall safety profile was similar to that in previous studies, and incidence of serious adverse events was similar across treatment groups (75 [11%] patients in the placebo group, 72 [11%] in the obeticholic acid 10 mg group, and 93 [14%] in the obeticholic acid 25 mg group). Interpretation Obeticholic acid 25 mg significantly improved fibrosis and key components of NASH disease activity among patients with NASH. The results from this planned interim analysis show clinically significant histological improvement that is reasonably likely to predict clinical benefit. This study is ongoing to assess clinical outcomes

Internet Use and Access, Behavior, Cyberbullying, and Grooming: Results of an Investigative Whole City Survey of Adolescents

BACKGROUND: According to the Digital Agenda for Europe, the way children use the Internet and mobile technologies has changed dramatically in the past years. OBJECTIVE: The aims of this study were to: (1) breakdown the modalities of access and use of the Internet by teenagers to assess risks and risky behaviors; and (2) provide scientific data to evaluate and counsel safe use of the Internet and new technologies by teenagers. METHODS: The study was conducted under the program "Strategies for a Better Internet for Children" started in May 2012 by the European Commission. It represents the main result of the project launched by Telecom Italia, "Anche io ho qualcosa da dire" (I too have something to say), thanks to which many contributions were collected and used to develop a survey. The questionnaire was structured in 45 questions, covering three macro areas of interest. It was approved by the Department Board at University of Magna Graecia's School of Medicine. After authorization from the regional high school authority, it was administered to all 1534 students (aged 13-19 years) in the city of Catanzaro, Italy. RESULTS: The data was broken down into three main groups: (1) describing education and access to the Internet; (2) methods of use and social networking; and (3) perception and evaluation of risk and risky behaviors. Among noteworthy results in the first group, we can mention that the average age of first contact with information technologies was around 9 years. Moreover, 78.87% (1210/1534) of the interviewed students reported having access to a smartphone or a tablet. Among the results of the second group, we found that the most used social networks were Facebook (85.78%, 1316/1534), YouTube (61.14%, 938/1534), and Google+ (51.56%, 791/1534). About 71.31% (1094/1534) of the interviewed teenagers use their name and surname on social networks, and 40.09% (615/1534) of them knew all their Facebook contacts personally. Among the results of the third group, we found that 7.69% (118/1534) of the interviewed teenagers have uploaded pictures or movies of which they felt ashamed; 27.05% (415/1534) have received invitations from people they met on the Internet to meet in real life; and 8.67% (133/1534) have accepted such invitations. CONCLUSIONS: The results offer a breakdown of the teenagers' use of the Internet, focusing on how teenagers learn to use and access it while taking into account factors such as parental coaching, schooling, or self-education. It describes how they approach and interact with social networks and how they perceive risks and risky behaviors on the Internet. Information technology must be seen as an instrument and not as a hindrance. For this to happen, parental guidance, schooling, and medical counseling are needed for a sound development of the child in this critical stage

Reti dinamiche di apprendimento a distanza

L'obiettivo del volume è una riconcettualizzazione della formazione e del ruolo dell'e-learning attraverso il paradigma delle reti dinamiche

Degenerative Lumbar Spine Stenosis Consensus Conference: the Italian Job. Recommendations of the Spinal Section of Italian Society of Neurosurgery

none28In the modern era evidence-based medicine, guidelines and recommendations represent a key-point of daily activity. The Spinal Section of the Italian Society of Neurosurgery introduced some recommendations regarding Degenerative Lumbar Spine Stenosis based on those of the Spine Committee of World Federation of Neurosurgical Societies, revising them on the basis of Italian common practice. Background: In the modern era evidence-based medicine, guidelines and recommendations represent a key-point of daily activity. The Spinal Section of the Italian Society of Neurosurgery introduced some recommendations regarding Degenerative Lumbar Spine Stenosis based on those of the Spine Committee of World Federation of Neurosurgical Societies, revising them on the basis of Italian common practice. Methods: In June 2019, a Committee of 21 spine surgeons met in Rome to validate the recommendations of the WFNS. Furthermore, they decided to review the ones that did not reach a consensus to create Italian Recommendations on Degenerative Lumbar Spine Stenosis. A literature review of the last ten years was performed and the statements were voted using the Delphi method. Results: 41 statements were discussed and 7 statements were voted again to reach a consensus with respect to those of the WFNS. A total of 40 statements reached a consensus, of which 36 reached a positive consensus and 4 a negative consensus, while no consensus was reached in 1 case. Conclusions: Conservative multimodal therapy, tailored on the patient, is a reasonable and effective first option choice for the treatment of LSS patients with tolerable moderate symptoms. Surgical treatment is reserved for symptomatic patients non-responding to conservative treatment or with neurological deficits. The best surgical technique to use depends on personal experience; modern MISS techniques are equivalent to open decompressive surgery with some advantages and higher cost-effectiveness. Fusion surgery and mobility preserving surgery only have a marginal role in the treatment of DLSS without instability.noneCosta, Francesco; Innocenzi, Gualtiero; Guida, Franco; Agrillo, Umberto; Barbagallo, Giuseppe; Bocchetti, Antonio; Bongetta, Daniele; Cappelletto, Barbara; Certo, Francesco; Cimatti, Marco; Cioffi, Valentina; Dobran, Mauro; Domenicucci, Maurizio; Guizzardi, Giancarlo; Guizzardi, Giulia; Landi, Alessandro; Marotta, Nicola; Marzetti, Francesco; Montano, Nicola; Anania, Carla D; Nina, Pierpaolo; Quaglietta, Paolo; Rispoli, Rossella; Somma, Teresa; Squillante, Eleonora; Visocchi, Massimiliano; Vitali, Matteo; Vitiello, VincenzoCosta, Francesco; Innocenzi, Gualtiero; Guida, Franco; Agrillo, Umberto; Barbagallo, Giuseppe; Bocchetti, Antonio; Bongetta, Daniele; Cappelletto, Barbara; Certo, Francesco; Cimatti, Marco; Cioffi, Valentina; Dobran, Mauro; Domenicucci, Maurizio; Guizzardi, Giancarlo; Guizzardi, Giulia; Landi, Alessandro; Marotta, Nicola; Marzetti, Francesco; Montano, Nicola; Anania, Carla D; Nina, Pierpaolo; Quaglietta, Paolo; Rispoli, Rossella; Somma, Teresa; Squillante, Eleonora; Visocchi, Massimiliano; Vitali, Matteo; Vitiello, Vincenz

A Prospective, Multicenter Study Examining the Relationship between Thyroid Cancer Treatment Outcomes and the Presence of Autoimmune Thyroiditis

: Background There is some controversy on the potential relationship between autoimmune processes and clinicopathological features as well as prognosis of differentiated thyroid cancer (DTC), and the evidence is limited by its largely retrospective nature. We examined the relationship between the presence of autoimmune thyroiditis and 1-year thyroid cancer treatment outcomes in a large, multi-center study, using prospectively collected data. Methods We included data from consecutive DTC patients enrolled in the Italian Thyroid Cancer observatory (ITCO) database (NCT04031339). We divided the groups according to the presence (AT) or absence (noAT) of associated autoimmune thyroiditis. We used propensity score matching to compare the clinical features and outcomes between the 2 groups at 1-year follow-up. Results We included data from 4233 DTC patients, including 3172 (75%) females. The American Thyroid Association (ATA) risk levels were as follows: 51% (2160/4233) low risk, 41.3% (1750/4233) intermediate risk, and 7.6% (323/4233) high risk. There were 1552 patients (36.7%) who had autoimmune thyroiditis. Before propensity score matching, AT patients were significantly younger, and had a smaller and bilateral tumor (p<0.0001). Patients with AT more frequently fell into the low and intermediate risk categories, while ATA high risk was more frequent among noAT patients (p=0.004). After propensity score matching, patients with AT more frequently showed evidence of disease (structural/biochemical incomplete response) versus excellent/indeterminate response, compared to patients without AT (7.3% versus 4.5%, p=0.001), with an OR of 1.86 (95% CI: 1.3-2.6, p=0.0001). However, when considering only structural persistence as the outcome, no statistically significant differences were observed between patients with or without AT (3.4% versus 2.7%, p=0.35). The elevated risk associated with ATA intermediate and high risk at diagnosis remained consistently statistically significant. Conclusions In this large prospective series, biochemical persistence was more frequent, at one-year follow-up, in AT patients. However, there was no significant association between the presence of AT and structural persistence of disease. These findings may be explained by the presence of a residual thyroid tissue

The representation of the onset of the Covid-19 pandemic and the consequent lockdown in Italy: A psychosocial research by SPS, Studio di Psicosociologia of Rome

A fine febbraio 2020, in SPS4ci siamo chiesti quali fossero i vissuti evocati dalla pandemia Covid-19 in esordio, e quali fatti “derivassero” da tali vissuti. A tal fine abbiamo interpellato 419 persone, tra l’1 marzo e il 5 maggio 2020. Il corpus raccolto è stato analizzato con l’Analisi Emozionale del Testo (AET). Si ipotizzava che la pandemia avesse destrutturato le modalità abituali di rapporto, e pensavamo stessero emergendo dimensioni relazionali inedite. I nostri dati dicono che l’individualismo abituale, di avida competitività, è in crisi. In risposta alla destrutturazione dello schema relazionale amico/nemico, alla base della socialità, è emerso un nuovo individualismo. La rappresentazione del pericolo insito nel contagio pandemico ci ha reso, tutti, potenzialmente nemici gli uni degli altri. Tutti siamo vissuti come potenzialmente nemici di tutti, a meno di non essere dichiaratamente malati. I malati, di contro, non sono vissuti come nemici: sono un’alterità scissa, relegata in un altrove lontano da chi è “sano”. Le cure, nel lockdown, erano confinate nell’ospedale, caratterizzate dall’isolamento, dall’emergenza, dalla morte esperita nel peggiore dei modi. L’altrove è stato reificato in un ospedale diventato sintomatico del fallimento del sistema sanitario. Si è costituito un “noi” qui insieme, sani e maniacalmente felici, e un “loro”contagiati, dannati, isolati e “altrove”. Internet, consentendo vicinanza senza contatto, è diventata un nuovo contesto di socialità. Ha permesso di ridiventare umani, ovvero amici, a meno che non si dimostri il contrario. Ma la nuova amicalità è fondata sulla scissione dall’altro dannato: la coppia malato/curante, e tutti gli esclusi, per diverse motivazioni, dalla protezione del lockdown. Dalla nuova socialità è escluso anche il vissuto dello stare chiusi in casa con gli abituali conviventi, dove emerge la violenza delle relazioni familiari obbligate. Si evidenziano altri esclusi dal noi maniacalmente amicale: gli anziani che non usano internet e che più di tutti rischiano di morire. C’è poi una cultura che, entro il fallimento delle relazioni sociali abituali, sottolinea l’impotenza delle istituzioni (politiche, sanitarie, mediatiche etc.) nella contingenza pandemica. Infine, c’è una cultura pre-lockdown, fatta della paura che porterà a scegliere l’isolamento. Manca, nei dati, il mondo produttivo, che non ha ritrovato, per gli interpellati dalla ricerca –nel periodo di tempo da noi considerato –un codice emozionale condiviso che potesse raccogliersi in un cluster. La ricerca aveva anche un obiettivo di intervento: quello di creare un contesto in cui l’evento pandemia potesse essere interpretato, entro un setting di partecipazione. Oltre a effettuare una pubblicazione rapida dei dati, intendiamo promuovere gruppi di discussione su internet con i partecipanti. La creazione di un contesto di condivisione è anche un motivo dell’alto numero di Autori.At the end of February 2020, in SPS2we asked ourselves what were the experiences evoked by the Covid-19 pandemic in its debut, and what facts “derived”from these experiences. To this end, we interviewed 419 people, between 1 March and 5 May 2020. The collected corpus was analyzed through the Emotional Text Analysis (AET). It was assumed that the pandemic had deconstructed the usual ways of relating, and we thought that new relational dimensions were emerging. Our data show that habitual individualism, of greedy competitiveness, is in crisis. A new individualism has emerged in response to the deconstruction of the friend/foerelational schema, at the basis of sociality. The representation of the danger inherent in the pandemic contagion has made us all potentially enemies of each other. We have all lived as potentially enemies of all, unless we are admittedly sick. The sick, on the other hand, are not experienced as enemies: they are a split otherness, relegated to an elsewhere far from those who are “healthy”. Duringthe lockdown, treatments were confined to the hospital, characterized by isolation, emergency, death experienced in the worst way. The othernesswas reified in a hospital that became symptomatic of the failure of the health system. A “we”has formed here together, healthy and maniacally happy, and a “them”infected, damned, isolated and “elsewhere”. The Internet, by allowing contactless proximity, has become a new context of sociality. It has allowed us to become human again, or friends, unless proven otherwise. But the new friendship is based on the split from the damned other: the sick/caring couple, and all those excluded, for various reasons, from the protection of the lockdown. The experience of being closed at home with the usual cohabitants is also excluded from the new sociality, where the violence of forced family relationships emerges. There are others excluded from a maniacally friendlyus: the elderly who do not use the internet and who most of all risk dying. There is also a culture that, within the failure of habitual social relations, underlines the powerlessness of institutions (political, health, media, etc.) in the pandemic contingency. Finally, there is a pre-lockdown culture, made up of fear that will lead to chooseisolation. In the data, the productive world is missing, which for those interviewed by the research did not find -in the period of time we considered -a shared emotional code that could be gathered in a cluster. The research also had an intervention objective: to create a context in which the pandemicevent could be interpreted, within a setting of participation. In addition to publishing the data quickly, we intend to promote discussion groups onthe internet with participants. The creation of a sharing context is also areason for the high number of Author