Teaching with Twitter:reflections on practices, opportunities and problems

In recent times there has been an increasing wave of interest in the use of Social Media for Teaching and Learning in Higher Education. In particular, the micro-blogging platform Twitter has been experimentally used in various Universities world-wide. There are relevant publications reporting on experimentations with Twitter for reaching diverse learning goals, including better engagement, informal learning or collaboration among students. Existing research papers on the use of Twitter however focus exclusively on the positive aspects of experimentations, on what went well in the use of Twitter. In our University we run a small project on the use of Twitter with goals that are similar to those of others: fostering participation and better learning processes. In this paper we report on our project and the strategies and best practices we adopted for using Twitter for teaching. We also reflect that in our experimentation however we encountered a number of practical problems connected for example with use of technology, with the class settings and with spam. In the conclusion we offer some recommendations for Teaching and Learning with Twitter based on our personal experience

Indexing the Event Calculus with Kd-trees to Monitor Diabetes

Personal Health Systems (PHS) are mobile solutions tailored to monitoring patients affected by chronic non communicable diseases. A patient affected by a chronic disease can generate large amounts of events. Type 1 Diabetic patients generate several glucose events per day, ranging from at least 6 events per day (under normal monitoring) to 288 per day when wearing a continuous glucose monitor (CGM) that samples the blood every 5 minutes for several days. This is a large number of events to monitor for medical doctors, in particular when considering that they may have to take decisions concerning adjusting the treatment, which may impact the life of the patients for a long time. Given the need to analyse such a large stream of data, doctors need a simple approach towards physiological time series that allows them to promptly transfer their knowledge into queries to identify interesting patterns in the data. Achieving this with current technology is not an easy task, as on one hand it cannot be expected that medical doctors have the technical knowledge to query databases and on the other hand these time series include thousands of events, which requires to re-think the way data is indexed. In order to tackle the knowledge representation and efficiency problem, this contribution presents the kd-tree cached event calculus (\ceckd) an event calculus extension for knowledge engineering of temporal rules capable to handle many thousands events produced by a diabetic patient. \ceckd\ is built as a support to a graphical interface to represent monitoring rules for diabetes type 1. In addition, the paper evaluates the \ceckd\ with respect to the cached event calculus (CEC) to show how indexing events using kd-trees improves scalability with respect to the current state of the art.Comment: 24 pages, preliminary results calculated on an implementation of CECKD, precursor to Journal paper being submitted in 2017, with further indexing and results possibilities, put here for reference and chronological purposes to remember how the idea evolve

Randomness in post-selected events

Bell inequality violations can be used to certify private randomness for use in cryptographic applications. In photonic Bell experiments, a large amount of the data that is generated comes from no-detection events and presumably contains little randomness. This raises the question as to whether randomness can be extracted only from the smaller post-selected subset corresponding to proper detection events, instead of from the entire set of data. This could in principle be feasible without opening an analogue of the detection loophole as long as the min-entropy of the post-selected data is evaluated by taking all the information into account, including no-detection events. The possibility of extracting randomness from a short string has a practical advantage, because it reduces the computational time of the extraction. Here, we investigate the above idea in a simple scenario, where the devices and the adversary behave according to i.i.d. strategies. We show that indeed almost all the randomness is present in the pair of outcomes for which at least one detection happened. We further show that in some cases applying a pre-processing on the data can capture features that an analysis based on global frequencies only misses, thus resulting in the certification of more randomness. We then briefly consider non-i.i.d strategies and provide an explicit example of such a strategy that is more powerful than any i.i.d. one even in the asymptotic limit of infinitely many measurement rounds, something that was not reported before in the context of Bell inequalities.Comment: similar to published version, new section (III) on photonic experiment

Advanced joined materials development and their shear strength evaluation for aerospace, energy and structural applications

L'abstract è presente nell'allegato / the abstract is in the attachmen

Voices from the past:Economic and political vulnerabilities in the making of Next Generation EU

In this article, we show that Next Generation EU (NGEU) is mainly a response to the economic and political imbalances left over from the Eurozone crisis. It is a pre-emptive intervention, especially targeted at structurally weak economies with rising Euroscepticism, to avoid costly ex-post bailouts as in the Great Recession. We demonstrate, using quantitative analysis, that pre-existing vulnerabilities, rather than the impact of the pandemic, drove the allocation of NGEU resources: per capita grants largely correspond to past economic vulnerabilities, as well as to political ones. Countries most vulnerable to another adjustment by austerity after the COVID-19 economic crisis receive most resources. Also, countries with strong anti-EU sentiments are entitled to larger NGEU grants per capita. In contrast, grants are not correlated with the severity of the health crisis. Then, we show the domestic relevance of economic and political vulnerabilities through qualitative case studies of national political debates and domestic positions on NGEU in Italy, Germany and the Netherlands. Despite its innovative traits, NGEU is a politically constrained solution to address the mess from the previous decade, and as such, it is a Janus solution: promising a fresh start, but haunted by the past

Alternating and Rotational Losses up to Magnetic Saturation in Non-Oriented Steel Sheets

partially_open5sìpartially_openAppino, Carlo; Khan, Mahmood; de la Barrière, Olivier; Ragusa, Carlo; Fiorillo, FaustoAppino, Carlo; Khan, Mahmood; de la Barrière, Olivier; Ragusa, Carlo; Fiorillo, Faust

Analisi dei siti web istituzionali dei musei statali italiani di proprietà del Ministero dei Beni e delle Attività Culturali (MIBAC) nei capoluoghi di provincia

Today's society is increasingly devoted to the use of the network to find information and is often influenced by the viral and captivating disclosure of news, so websites and Facebook pages stand today as the main channels of communication. Especially the museums, should therefore focus a great deal on these channels in order to perform their marketing activities both for an endogenous improvement of their services, through the evaluation of users, and for an optimal fruition of their resources by visitors. This article, in this general framework, proposes the results of a field survey conducted to evaluate the digital and communicative skills of Italian museums, through the analysis of the relevant institutional websites and their official Facebook pages

Deformation pattern around the conejera fault blocks (asturian basin, north iberian margin)

The Asturian Basin is located on the coastline of the North Iberian Margin. This basin is dissected by long-lived E-, NE- and NW-striking faults that delineate a series of extensional fault blocks that became shortened during the Upper Cretaceous to Cenozoic Alpine convergence. In the Conejera cove, the NE-striking and SE-dipping Conejera Fault displays a remarkable example of contractional deformation, promoted by the mechanical contrast within the Lower to Middle Jurassic stratigraphic series. Field observations and structural analysis carried out in this study reveal: i) a first system of orthogonal cross-joints oblique to the Conejera Fault and other major onshore boundary faults, ii) a second system of meso-extensional faults parallel to the Conejera Fault, and developed by the reactivation and linkage of the orthogonal cross-joints and iii) a series of contractional folds, thrusts and pressure solution with a predominant NE to ENE trend. Observed relationships and structural analysis suggest an obliquity between the here inferred direction of the Late Jurassic-Early Cretaceous stretching (i.e. about N015E) and the onshore boundary faults, whereas the contractional structures are broadly parallel to the NE-striking Conejera Fault and suggest a roughly SSE- to SE-oriented Alpine convergence