Big data and virtual communities: methodological issues

Virtual communities represent today en emergent phenomenon through which users get together to create ideas, to obtain help from one another, or just to casually engage in discussions. Their increasing popularity as well as their utility as a source of business value and marketing strategies justify the necessity of defi ning some specifi c methodologies for analyzing them. The aim of this paper is providing new insights into virtual communities from a methodological viewpoint, highlighting the main trends and challenge

Il patrimonio culturale e paesaggistico per lo sviluppo locale

Il contributo tematizza il ruolo delle Fondazioni Bancarie nel sostegno e nella promozione di progetti di sviluppo locale basati sul patrimonio culturale e paesaggistico

Arabidopsis DOF Transcription Factors Act Redundantly to Reduce CONSTANS Expression and Are Essential for a Photoperiodic Flowering Response

SummaryFlowering of Arabidopsis is induced by long summer days (LDs). The transcriptional regulator CONSTANS (CO) promotes flowering, and its transcription is increased under LDs. We systematically misexpressed transcription factors in companion cells and identified several DOF proteins that delay flowering by repressing CO transcription. Combining mutations in four of these, including CYCLING DOF FACTOR 2 (CDF2), caused photoperiod-insensitive early flowering by increasing CO mRNA levels. CO transcription is promoted to differing extents by GIGANTEA (GI) and the F-box protein FKF1. We show that GI stabilizes FKF1, thereby reducing CDF2 abundance and allowing transcription of CO. Despite the crucial function of GI in wild-type plants, introducing mutations in the four DOF-encoding genes into gi mutants restored the diurnal rhythm and light inducibility of CO. Thus, antagonism between GI and DOF transcription factors contributes to photoperiodic flowering by modulating an underlying diurnal rhythm in CO transcript levels

Nutritional status in post SARS-Cov2 rehabilitation patients

After prolonged hospitalization, the assessment of nutritional status and the identification of adequate nutritional support is of paramount importance. In this observational study, we aimed at assessing the presence of a malnutrition condition in SARS-Cov2 patients after the acute phase and the effects of a multidisciplinary rehabilitation program on nutritional and functional status

Social distance during the covid-19 pandemic reflects perceived rather than actual risk

Interpersonal space (IPS) is the area surrounding our own bodies in which we interact comfortably with other individuals. During the COVID-19 pandemic, keeping larger IPS than usual, along with wearing a face mask, is one of the most effective measures to slow down the COVID-19 outbreak. Here, we explore the contribution of actual and perceived risk of contagion and anxiety levels in regulating our preferred social distance from other people during the first wave of the COVID-19 pandemic in Italy. In this study, 1293 individuals from six Italian regions with different levels of actual risk of infection participated in an online survey assessing their perceived risk to be infected, level of anxiety and IPS. Two tasks were adopted as measures of interpersonal distance: the Interpersonal Visual Analogue Scale and a questionnaire evaluating interpersonal distance with and without face mask. The results showed that the IPS regulation was affected by how people subjectively perceived COVID-19 risk and the related level of anxiety, not by actual objective risk. This clarifies that the role of threat in prompting avoidant behaviors expressed in increased IPS does not merely reflect environmental events but rather how they are subjectively experienced and represented

Empirical agent-based modelling of everyday pro-environmental behaviours at work

We report on agent-based modelling work in the LOCAW project (Low Carbon at Work: Modelling Agents and Organisations to Achieve Transition to a Low Carbon Europe). The project explored the effectiveness of various backcasting scenarios conducted with case study organisations in bringing about pro-environmental change in the workforce in the domains of transport, energy use and waste. The model used qualitative representations of workspaces in formalising each scenario, and decision trees learned from questionnaire responses to represent decision-making. We describe the process by which the decision trees were constructed, noting that the use of decision trees in agent-based models requires particular considerations owing to the potential use of explanatory variables in model dynamics. The results of the modelling in various scenarios emphasise the importance of structural environmental changes in facilitating everyday pro-environmental behaviour, but also show there is a role for psychological variables such as norms, values and efficacy. As such, the topology of social interactions is a potentially important driver, raising the interesting prospect that both workplace geography and organisational hierarchy have a role to play in influencing workplace pro-environmental behaviours

Valutazione della prevalenza dell'epatite C in 182 pazienti affetti da psoriasi: correlazione con la gravità della malattia e difficoltà di gestione terapeutica

La psoriasi è una patologia cutanea infiammatoria cronica con prevalenza tra lo 0.8 e l’11%. L’epatite C è una patologia infettiva con prevalenza del 2.6% a livello mondiale. Di recente interesse è la valutazione di una possi-bile correlazione non casuale tra le due patologie in relazione all’utilizzo nella terapia della psoriasi di farmaci immunosoppressori (anti-TNFα, ciclosporina) in grado causare la riattivazione di infezioni tra cui HCV. Lo scopo di questo studio è la valutazione della prevalenza dell’epatite C in una popolazione di pazienti psoria-sici, della correlazione tra la presenza dell’infezione e la gravità della patologia cutanea e della difficoltà di ge-stione terapeutica di pazienti psoriasici HCV-positivi. Fanno parte dello studio 182 pazienti affetti da psoriasi in cui sono stati valutati gli indici di funzionalità epatica, i markers dell’epatite C (HCV-RNA, HCV-ab) e il PASI (indice di gravità della psoriasi). La prevalenza dell’epatite C in questa popolazione è stata messa a confronto con quella presente in una popolazione generale lombarda composta da 2154 soggetti risultando più che doppia nei soggetti psoriasici. Le due popolazioni sono state suddivise per sesso ed età: in entrambe la prevalenza dell’epatite è risultata pressoché uguale nei due sessi e maggiore nei soggetti di età più avanzata. La media del PASI dei soggetti psoriasici HCV-positivi è risultata più che doppia rispetto a quella dei soggetti psoriasici HCV-negativi. Questi risultati indicano una correlazione non casuale tra psoriasi ed epatite C e che la presenza dell’infezione si associa ad una maggiore gravità del quadro cutaneo. I pazienti HCV-positivi che avevano effettuato in precedenza terapia con interferone avevano un PASI superiore a quelli che non avevano effettuato la terapia, è probabile che la terapia per l’epatite determini un ulteriore aggravamento del quadro cutaneo. L’epatite C va quindi considerata una comorbilità maggiore da rilevare e monitorare nei pazienti psoriasici per la duplice difficoltà di gestione terapeutica in questi soggetti