On the properties of the Lambda value at risk: robustness, elicitability and consistency

Recently, financial industry and regulators have enhanced the debate on the good properties of a risk measure. A fundamental issue is the evaluation of the quality of a risk estimation. On the one hand, a backtesting procedure is desirable for assessing the accuracy of such an estimation and this can be naturally achieved by elicitable risk measures. For the same objective, an alternative approach has been introduced by Davis (2016) through the so-called consistency property. On the other hand, a risk estimation should be less sensitive with respect to small changes in the available data set and exhibit qualitative robustness. A new risk measure, the Lambda value at risk (Lambda VaR), has been recently proposed by Frittelli et al. (2014), as a generalization of VaR with the ability to discriminate the risk among P&L distributions with different tail behaviour. In this article, we show that Lambda VaR also satisfies the properties of robustness, elicitability and consistency under some conditions

The missing piece: The Ti3C2Tx MXene structure and its role in the outstanding reversibility as negative electrode in sodium ion batteries

This study proposes the full structural characterization of the most common MXene composition, Ti3C2Tx, which presents outstanding stability as anode for sodium ion batteries (100% of capacity retention after 530 cycles with charge efficiency > 99.7%). The structural investigation is carried out with a multi-technique approach that allows to explore both the short- and long- range structure, combining the analysis of X ray absorption spectroscopy, X-ray and neutron diffraction data, and TEM images. The diffraction data have been analyzed with the approach embodied in the Faults software, that accounts for the evaluation of extended defects, thus allowing to fit, for the first time, the MXene diffraction patterns. The analysis shows that the presence of static disorder on the termination sites induces a variability in the interlayer distance which affects the electrochemical properties

The Missing Piece: The Structure of the Ti3C2Tx MXene and Its Behavior as Negative Electrode in Sodium Ion Batteries

The most common MXene composition Ti3C2Tx (T = F, O) shows outstanding stability as anode for sodium ion batteries (100% of capacity retention after 530 cycles with charge efficiency >99.7%). However, the reversibility of the intercalation/deintercalation process is strongly affected by the synthesis parameters determining, in turn, significant differences in the material structure. This study proposes a new approach to identify the crystal features influencing the performances, using a structural model built with a multitechnique approach that allows exploring the short-range order of the lamella. The model is then used to determine the long-range order by inserting defective elements into the structure. With this strategy it is possible to fit the MXene diffraction patterns, obtain the structural parameters including the stoichiometric composition of the terminations (neutron data), and quantify the structural disorder which can be used to discriminate the phases with the best electrochemical properties

The system A12O3 and (Sr,Mg)-doped LaGaO3: Phase composition and electrical properties

Mixtures of a-Al2O3 and La0.8Sr 0.2Ga0.8Mg0.2O3 -δ, with αAl2O3 concentrations ranging from I to 20 wt.%, were uniaxially and isostatically pressed and finally sintered at 1500 °C for 4 h. The phase composition and microstructure were investigated by X-ray powder diffraction and scanning electron microscopy techniques. The electrical properties were studied by complex impedance spectroscopy in a wide range of temperatures (200-800 °C) in air. In the sintered bodies pure a-Al 2O3 was not detected; the partial substitution of Al for Ga was suggested entailing the formation of the solid solutions of perovskite-type (La0.8Sr0.2)(Ga1-x-yAl xMgxO3δ and La0.8SSr 0.2Ga1-xAlx O3δ. α-Al2O3 added to La0.8Sr 0.2Ga0.8Mg0.2O3-δinhibited the grain growth of the majority phase. Under isothermal conditions, the electrical conductivity decreases with increasing alumina content, while the activation energies increase

Effects on the incidence of cardiovascular events of the addition of pioglitazone versus sulfonylureas in patients with type 2 diabetes inadequately controlled with metformin (TOSCA.IT): a randomised, multicentre trial

Background The best treatment option for patients with type 2 diabetes in whom treatment with metformin alone fails to achieve adequate glycaemic control is debated. We aimed to compare the long-term effects of pioglitazone versus sulfonylureas, given in addition to metformin, on cardiovascular events in patients with type 2 diabetes. Methods TOSCA.IT was a multicentre, randomised, pragmatic clinical trial, in which patients aged 50\ue2\u80\u9375 years with type 2 diabetes inadequately controlled with metformin monotherapy (2\ue2\u80\u933 g per day) were recruited from 57 diabetes clinics in Italy. Patients were randomly assigned (1:1), by permuted blocks randomisation (block size 10), stratified by site and previous cardiovascular events, to add-on pioglitazone (15\ue2\u80\u9345 mg) or a sulfonylurea (5\ue2\u80\u9315 mg glibenclamide, 2\ue2\u80\u936 mg glimepiride, or 30\ue2\u80\u93120 mg gliclazide, in accordance with local practice). The trial was unblinded, but event adjudicators were unaware of treatment assignment. The primary outcome, assessed with a Cox proportional-hazards model, was a composite of first occurrence of all-cause death, non-fatal myocardial infarction, non-fatal stroke, or urgent coronary revascularisation, assessed in the modified intention-to-treat population (all randomly assigned participants with baseline data available and without any protocol violations in relation to inclusion or exclusion criteria). This study is registered with ClinicalTrials.gov, number NCT00700856. Findings Between Sept 18, 2008, and Jan 15, 2014, 3028 patients were randomly assigned and included in the analyses. 1535 were assigned to pioglitazone and 1493 to sulfonylureas (glibenclamide 24 [2%], glimepiride 723 [48%], gliclazide 745 [50%]). At baseline, 335 (11%) participants had a previous cardiovascular event. The study was stopped early on the basis of a futility analysis after a median follow-up of 57\uc2\ub73 months. The primary outcome occurred in 105 patients (1\uc2\ub75 per 100 person-years) who were given pioglitazone and 108 (1\uc2\ub75 per 100 person-years) who were given sulfonylureas (hazard ratio 0\uc2\ub796, 95% CI 0\uc2\ub774\ue2\u80\u931\uc2\ub726, p=0\uc2\ub779). Fewer patients had hypoglycaemias in the pioglitazone group than in the sulfonylureas group (148 [10%] vs 508 [34%], p<0\uc2\ub70001). Moderate weight gain (less than 2 kg, on average) occurred in both groups. Rates of heart failure, bladder cancer, and fractures were not significantly different between treatment groups. Interpretation In this long-term, pragmatic trial, incidence of cardiovascular events was similar with sulfonylureas (mostly glimepiride and gliclazide) and pioglitazone as add-on treatments to metformin. Both of these widely available and affordable treatments are suitable options with respect to efficacy and adverse events, although pioglitazone was associated with fewer hypoglycaemia events. Funding Italian Medicines Agency, Diabete Ricerca, and Italian Diabetes Society

Dietary intake and major food sources of polyphenols in people with type 2 diabetes: The TOSCA.IT Study

none200nononeVitale, M.; Masulli, M.; Rivellese, A.A.; Bonora, E.; Cappellini, F.; Nicolucci, A.; Squatrito, S.; Antenucci, D.; Barrea, A.; Bianchi, C.; Bianchini, F.; Fontana, L.; Fornengo, P.; Giorgino, F.; Gnasso, A.; Mannucci, E.; Mazzotti, A.; Nappo, R.; Palena, A.P.; Pata, P.; Perriello, G.; Potenziani, S.; Radin, R.; Ricci, L.; Romeo, F.; Santini, C.; Scarponi, M.; Serra, R.; Timi, A.; Turco, A.A.; Vedovato, M.; Zavaroni, D.; Grioni, S.; Riccardi, G.; Vaccaro, O; Rivellese, Angela Albarosa; Cocozza, Sara; Auciello, Stefania; Turco, Anna Amelia; Bonora, Enzo; Cigolini, Massimo; Pichiri, Isabella; Brangani, Corinna; Tomasetto, Elena; Perriello, Gabriele; Timi, Alessia; Squatrito, Sebastiano; Sinagra, Tiziana; Longhitano, Sara; Tropea, Vanessa; Ballardini, Giorgio; Babini, Anna Carla; Ripani, Raffaella; Gregori, Giovanna; Dolci, Maria; Bruselli, Laura; Salutini, Isabella; Mori, Mary; Baccetti, Fabio; Lapolla, Annunziata; Sartore, Giovanni; Burlina, Silvia; Chilelli, Nino Cristiano; Buzzetti, Raffaella; Venditti, Chiara; Potenziani, Stella; Carlone, Angela; Galluzzo†, Aldo; Giordano, Carla; Torregrossa, Vittoria; Corsi, Laura; Cuneo, Giacomo; Corsi, Simona; Tizio, Biagio; Clemente, Gennaro; Citro, Giuseppe; Natale, Maria; Salvatore, Vita; Di Cianni, Graziano; Lacaria, Emilia; Russo, Laura; Iannarelli, Rossella; de Gregorio, Antonella; Sciarretta, Filomena; D’Andrea, Settimio; Montani, Valeria; Cannarsa, Emanuela; Dolcetti, Katia; Cordera, Renzo; Bonabello, Laura Affinito; Mazzucchelli, Chiara; Giorda, Carlo Bruno; Romeo, Francesco; Bonetto, Caterina; Antenucci, Daniela; Baldassarre, Maria Pompea Antonia; Iovine, Ciro; Nappo, Rossella; Ciano, Ornella; Dall’Aglio, Elisabetta; Mancastroppa, Giovanni; Grimaldi, Franco; Tonutti, Laura; Boemi, Massimo; D’Angelo, Federica; Leotta, Sergio; Fontana, Lucia; Lauro, Davide; Rinaldi, Maria Elena; Cignarelli, Mauro; la Macchia, Olga; Fariello, Stefania; Tomasi, Franco; Zamboni, Chiara; Dozio, Nicoletta; Trevisan, Roberto; Scaranna, Cristiana; Del Prato, Stefano; Miccoli, Roberto; Bianchi, Cristina; Garofolo, Monia; Pugliese, Giuseppe; Salvi, Laura; Rangel, Graziela; Vitale, Martina; Anichini, Roberto; Tedeschi, Anna; Corsini, Elisa; Cucinotta, Domenico; Di Benedetto, Antonino; Giunta, Loretta; Ruffo, Maria Concetta; Bossi, Antonio Carlo; Carpinter, Rita; Dotta, Francesco; Ceccarelli, Elena; Bartolo, Paolo Di; Caselli, Chiara; Luberto, Alessandra; Santini, Costanza; Mazzotti, Arianna; Calbucci, Giovanni; Consoli, Agostino; Ginestra, Federica; Calabrese, Maria; Zogheri, Alessia; Ricci, Lucia; Giorgino, Francesco; Laviola, Luigi; Ippolito, Claudia; Tarantino, Lucia; Avogaro, Angelo; Vedovato, Monica; Gnasso, Agostino; Carallo, Claudio; Scicchitano, Caterina; Zavaroni, Donatella; Livraga, Stefania; Perin, Paolo Cavallo; Forrnengo, Paolo; Prinzis, Tania; de Cosmo, Salvatore; Palena, Antonio Pio; Bacci, Simonetta; Mannucci, Edoardo; Lamanna, Caterina; Pata, Pietro; Lettina, Gabriele; Aiello, Antimo; Barrea, Angelina; Lalli, Carlo; Scarponi, Maura; Franzetti, Ivano; Radin, Raffaella; Serra, Rosalia; Petrachi, Francesca; Asprino, Vincenzo; Capra, Claudio; Cigolini, Massimo; Forte, Elisa; Potenziani, Stella; Reggiani, Giulio Marchesini; Forlani, Gabriele; Montesi, Luca; Mazzella, Natalia; Piatti, Pier Marco; Monti, Lucilla; Stuccillo, Michela; Auletta, Pasquale; Petraroli, Ettore; Capobianco, Giuseppe; Romano, Geremia; Cutolo, Michele; de Simone, Giosetta; Caiazzo, Gennaro; Nunziata, Peppe; Sorrentino, Susy; Amelia, Umberto; Calatola, Pasqualino; Capuano, GelsominaVitale, M.; Masulli, M.; Rivellese, A. A.; Bonora, Enzo; Cappellini, F.; Nicolucci, A.; Squatrito, S.; Antenucci, D.; Barrea, A.; Bianchi, C.; Bianchini, FRANCESCA ANTONIA; Fontana, L.; Fornengo, P.; Giorgino, FRANCESCO LIBERO; Gnasso, A.; Mannucci, E.; Mazzotti, Alfredo; Nappo, R.; Palena, A. P.; Pata, P.; Perriello, G.; Potenziani, S.; Radin, R.; Ricci, Laura; Romeo, Francesco; Santini, C.; Scarponi, M.; Serra, Roberto; Timi, A.; Turco, A. A.; Vedovato, M.; Zavaroni, D.; Grioni, S.; Riccardi, Giovanna; Vaccaro, O; Rivellese, Angela Albarosa; Cocozza, Sara; Auciello, Stefania; Turco, Anna Amelia; Bonora, Enzo; Cigolini, Massimo; Pichiri, Isabella; Brangani, Corinna; Tomasetto, Elena; Perriello, Gabriele; Timi, Alessia; Squatrito, Sebastiano; Sinagra, Tiziana; Longhitano, Sara; Tropea, Vanessa; Ballardini, Giorgio; Babini, Anna Carla; Ripani, Raffaella; Gregori, Giovanna; Dolci, Maria; Bruselli, Laura; Salutini, Isabella; Mori, Mary; Baccetti, Fabio; Lapolla, Annunziata; Sartore, Giovanni; Burlina, Silvia; Chilelli, NINO CRISTIANO; Buzzetti, Raffaella; Venditti, Chiara; Potenziani, Stella; Carlone, Angela; Galluzzo†, Aldo; Giordano, Carla; Torregrossa, Vittoria; Corsi, Laura; Cuneo, Giacomo; Corsi, Simona; Tizio, Biagio; Clemente, Gennaro; Citro, Giuseppe; Natale, Maria; Salvatore, Vita; Di Cianni, Graziano; Lacaria, Emilia; Russo, Laura; Iannarelli, Rossella; de Gregorio, Antonella; Sciarretta, Filomena; D’Andrea, Settimio; Montani, Valeria; Cannarsa, Emanuela; Dolcetti, Katia; Cordera, Renzo; Bonabello, Laura Affinito; Mazzucchelli, Chiara; Giorda, Carlo Bruno; Romeo, Francesco; Bonetto, Caterina; Antenucci, Daniela; Baldassarre, Maria Pompea Antonia; Iovine, Ciro; Nappo, Rossella; Ciano, Ornella; Dall’Aglio, Elisabetta; Mancastroppa, Giovanni; Grimaldi, Franco; Tonutti, Laura; Boemi, Massimo; D’Angelo, Federica; Leotta, Sergio; Fontana, Lucia; Lauro, Davide; Rinaldi, Maria Elena; Cignarelli, Mauro; la Macchia, Olga; Fariello, Stefania; Tomasi, Franco; Zamboni, Chiara; Dozio, Nicoletta; Trevisan, Roberto; Scaranna, Cristiana; Del Prato, Stefano; Miccoli, Roberto; Bianchi, Cristina; Garofolo, Monia; Pugliese, Giuseppe; Salvi, Laura; Rangel, Graziela; Vitale, Martina; Anichini, Roberto; Tedeschi, Anna; Corsini, Elisa; Cucinotta, Domenico; Di Benedetto, Antonino; Giunta, Loretta; Ruffo, Maria Concetta; Bossi, Antonio Carlo; Carpinter, Rita; Dotta, Francesco; Ceccarelli, Elena; Bartolo, Paolo Di; Caselli, Chiara; Luberto, Alessandra; Santini, Costanza; Mazzotti, Arianna; Calbucci, Giovanni; Consoli, Agostino; Ginestra, Federica; Calabrese, Maria; Zogheri, Alessia; Ricci, Lucia; Giorgino, FRANCESCO LIBERO; Laviola, Luigi; Ippolito, Claudia; Tarantino, Lucia; Avogaro, Angelo; Vedovato, Monica; Gnasso, Agostino; Carallo, Claudio; Scicchitano, Caterina; Zavaroni, Donatella; Livraga, Stefania; Perin, Paolo Cavallo; Forrnengo, Paolo; Prinzis, Tania; de Cosmo, Salvatore; Palena, Antonio Pio; Bacci, Simonetta; Mannucci, Edoardo; Lamanna, Caterina; Pata, Pietro; Lettina, Gabriele; Aiello, Antimo; Barrea, Angelina; Lalli, Carlo; Scarponi, Maura; Franzetti, Ivano; Radin, Raffaella; Serra, Rosalia; Petrachi, Francesca; Asprino, Vincenzo; Capra, Claudio; Cigolini, Massimo; Forte, Elisa; Potenziani, Stella; Reggiani, Giulio Marchesini; Forlani, Gabriele; Montesi, Luca; Mazzella, Natalia; Piatti, Pier Marco; Monti, Lucilla; Stuccillo, Michela; Auletta, Pasquale; Petraroli, Ettore; Capobianco, Giuseppe; Romano, Geremia; Cutolo, Michele; de Simone, Giosetta; Caiazzo, Gennaro; Nunziata, Peppe; Sorrentino, Susy; Amelia, Umberto; Calatola, Pasqualino; Capuano, Gelsomin

Dietary intake and major food sources of polyphenols in people with type 2 diabetes: The TOSCA.IT Study

Purpose: Proper evaluation of polyphenols intake at the population level is a necessary step in order to establish possible associations with health outcomes. Available data are limited, and so far no study has been performed in people with diabetes. The aim of this work was to document the intake of polyphenols and their major food sources in a cohort of people with type 2 diabetes and in socio-demographic subgroups. Methods: We studied 2573 men and women aged 50â\u80\u9375 years. Among others, anthropometry was measured by standard protocol and dietary habits were investigated by food frequency questionnaire (EPIC). The intake of polyphenols was evaluated using US Department of Agriculture and Phenol-Explorer databases. Results: The mean total polyphenol intake was 683.3 ± 5.8 mg/day. Non-alcoholic beverages represented the main food source of dietary polyphenols and provided 35.5% of total polyphenol intake, followed by fruits (23.0%), alcoholic beverages (14.0%), vegetables (12.4%), cereal products and tubers (4.6%), legumes (3.7%) and oils (2.1%); chocolate, cakes and nuts are negligible sources of polyphenols in this cohort. The two most important polyphenol classes contributing to the total intake were flavonoids (47.5%) and phenolic acids (47.4%). Polyphenol intake increased with age and education level and decreased with BMI; furthermore, in the northern regions of Italy, the polyphenol intake was slightly, but significantly higher than in the central or southern regions. Conclusions: The study documents for the first time the intake of polyphenols and their main food sources in people with diabetes using validated and complete databases of the polyphenol content of food. Compared with published data, collected in people without diabetes, these results suggest a lower intake and a different pattern of intake in people with diabetes