988 research outputs found
Bertoldo, Bertoldino e Cacasenno, poema giocoso.
No full textPoem in 20 cantos each by a different author, G.P. Riva, P.B. Balbi and others, which is a metrical version of the prose romances "Le sottilissime astutie di Bertoldo" and "Le piacevoli et ridicolose simplicità di Bertoldino" by G.C. Croce and the "Novella di Cacasseno" by A. Banchieri under the pseudonym of Camillo Scaligeri della Fratta.Mode of access: Internet
77 GHz radar for meteorological purposes: preliminary results
No full textThe European Telecommunications Standards Institute defines the frequency band around 77 GHz as dedicated to automatic cruise control long-range radars, but recent works demonstrated that, under specific assumption and with the right theoretical background, it is also possible to use a W-band radar as a short range microwave rain gauge.
Working at 77 GHz, raindrop size are comparable to the used wavelength and therefore it is necessary to use the general Mie scattering theory. In order to avoid underestimation of rain (up to -20 dB), the proper relation between the radar reflectivity factor Z and the rainfall rate R (the so-called Z-R equation) should be used, specifically determined for such frequency with the Mie scattering theory. A possible Z-R equation for 77 GHz radar has been presented by Bertoldo et. al. in 2017, during the EGU General Assembly.
An overview of functional requirements to adapt an automatic cruise control long-range radar (of particular interests for its low cost) to a short-range microwave rain gauge is given qualified for achieving rainfall measurements. Using a commercial prototype of W-band radar some preliminary measurements were made and will be presented. It is shown that it is possible to use W-band radar for monitoring weather events. A good Quantitative Precipitation Estimation (QPE) can be achieved with an acceptable approximation
Chemical Methods for Gelatin Crosslinking: A Review
No full textChemical methods so far experimentally investigated for gelatin crosslinking have been summarized with special emphasis on the reaction mechanisms. Advantages and disadvantages of all reactants have been reported in relation to the significant properties of the final applicative field
Uso di diazo derivati per l’innesto di gruppi funzionali sulla superficie di film di polietilene
No full textStudio della reazione della gelatina con esametilen-1,6-diisocianato
No full text1,6-hexamethylene diisocyanate and dimethylsolfoxide were exploited as crosslinker agent and reaction solvent, respectively in the crosslinking of gelatine. The effect of the diisocianate concentration on the crosslinking yield was studied by selective extraction with hot water of the treated gelatine. All produced materials were characterised by infrared spectroscopy, thermogravimetric analysis, electron dispersion analysis and electron microscopy investigation. High crosslinking yields and good thermal stability were found under all investigated conditions
Designing Studies and Evaluating Research Results: Type M and Type S Errors for Pearson Correlation Coefficient
No full textIt is widely appreciated that many studies in psychological science suffer from low statistical power. One of the consequences of analyzing underpowered studies with thresholds of statistical significance is a high risk of finding exaggerated effect size estimates, in the right or the wrong direction. These inferential risks can be directly quantified in terms of Type M (magnitude) error and Type S (sign) error, which directly communicate the consequences of design choices on effect size estimation. Given a study design, Type M error is the factor by which a statistically significant effect is on average exaggerated. Type S error is the probability to find a statistically significant result in the opposite direction to the plausible one. Ideally, these errors should be considered during a prospective design analysis in the design phase of a study to determine the appropriate sample size. However, they can also be considered when evaluating studies’ results in a retrospective design analysis. In the present contribution, we aim to facilitate the considerations of these errors in the research practice in psychology. For this reason, we illustrate how to consider Type M and Type S errors in a design analysis using one of the most common effect size measures in psychology: Pearson correlation coefficient. We provide various examples and make the R functions freely available to enable researchers to perform design analysis for their research projects
Understanding the Accelerating Effect of - Caprolactam on the Formation of Urethane Linkages
No full textThe accelerating role of -caprolactam on the formation of urethane linkages is studied in
the case of the reaction between toluene 2,4-diisocyanate and n-propanol in carbon tetrachloride at room
temperature. FT-IR spectroscopy is exploited to follow the consumption of the isocyanate groups. The
comparison between the rate of the reactions carried out in the presence and absence of a catalytic amount
of -caprolactam shows its accelerating effect. The acylurea-like derivative 1-methyl-2,4-[(2-oxoazepane-
1-carbonyl)amino]benzene has been prepared and identified as the real catalytic species formed in situ
as a result of the reaction between toluene 2,4-diisocyanate and -caprolactam. A kinetic model is proposed
to analyze the experimental data, and B3LYP/6-31+G* calculations are exploited to investigate the
structure of 1-methyl-2,4-[(2-oxoazepane-1-carbonyl)amino]benzene and clarify the structural features
leading the catalytic activity
Immunological properties of S-adenosylhomocysteine hydrolase from Sulfolobus solfataricus, a thermophilic archaebacterium
No full textS-Adenosylhomocysteine hydrolase from the thermophilic archaebacterium Sulfolobus solfataricus: chemical cleavage and peptide analysis
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