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E. Michelini,P. Bernardi,R. Cerioni,B. Belletti 한국콘크리트학회 2020 International Journal of Concrete Structures and M Vol.14 No.4
The paper presents the results of flexural and shear tests up to failure on full-scale hollow-core slabs (HCS) having a depth of 500 mm. A detailed non-linear 2D finite element model is also developed to predict the stress distribution and crack pattern within the slabs, providing a well match with experimental results. Experimental and numerical results are compared with analytical calculations provided by Product Standard EN 1168, highlighting the inaccuracy of technical regulations in predicting shear behavior. The proposed numerical procedure is instead viable and sound for the design and the strength assessment of HCS, and can be extended easily to the analysis of whole floor systems.
Early dropout predictive factors in obesity treatment
Ilaria Michelini,Anna Giulia Falchi,Chiara Muggia,Ilaria Grecchi,Elisabetta Montagna,Annalisa De Silvestri,Carmine Tinelli 한국영양학회 2014 Nutrition Research and Practice Vol.8 No.1
Diet attrition and failure of long term treatment are very frequent in obese patients. This study aimed to identify pre-treatment variables determining dropout and to customise the characteristics of those most likely to abandon the program before treatment, thus making it possible to modify the therapy to increase compliance. A total of 146 outpatients were consecutively enrolled; 73 patients followed a prescriptive diet while 73 followed a novel brief group Cognitive Behavioural Treatment (CBT) in addition to prescriptive diet. The two interventions lasted for six months. Anthropometric, demographic, psychological parameters and feeding behaviour were assessed, the last two with the Italian instrument VCAO Ansisa; than, a semi-structured interview was performed on motivation to lose weight. To identify the baseline dropout risk factors among these parameters, univariate and multivariate logistic models were used. Comparison of the results in the two different treatments showed a higher attrition rate in CBT group, despite no statistically significant difference between the two treatment arms (P = 0.127). Dropout patients did not differ significantly from those who did not dropout with regards to sex, age, Body Mass Index (BMI), history of cycling, education, work and marriage. Regardless of weight loss, the most important factor that determines the dropout appears to be a high level of stress revealed by General Health Questionnaire-28 items (GHQ-28) score within VCAO test. The identification of hindering factors during the assessment is fundamental to reduce the dropout risk. For subjects at risk, it would be useful to dedicate a stress management program before beginning a dietary restriction.
Gara, Pedro M. David,Bosio, Gabriela N.,Gonzalez, Monica C.,Russo, Nino,Michelini, Maria del Carmen,Diez, Reinaldo Pis,Martire, Daniel O. Korean Society of Photoscience 2009 Photochemical & photobiological sciences Vol.8 No.7
The kinetics of the reaction of sulfate radicals with the IHSS Waskish peat fulvic acid in water was investigated in the temperature range from 289.2 to 305.2 K. The proposed mechanism considers the reversible binding of the sulfate radicals by the fulvic acid. The kinetic analysis of the data allows the determination of the thermodynamic parameters ${\Delta}G^{\circ}$ = -10.2 kcal $mol^{-1}$, ${\Delta}H^{\circ}$ = -16 kcal $mol^{-1}$ and ${\Delta}S^{\circ}$ = -20.3 cal $K^{-1}mol^{-1}$ for the reversible association at 298.2 K. Theoretical (DFT) calculations performed with the Buffle model of the fulvic acids support the formation of H-bonded adducts between the inorganic radicals and the humic substances. The experimental enthalpy change compares well with the theoretical values found for some of the investigated adducts.