Search results for "09"
showing 10 items of 12776 documents
Le competenze delle regioni in materia di sport
2009
Il saggio intende anzitutto cogliere lo stato dell’assetto dei rapporti fra lo Stato e i suoi enti, da un lato, e la Regione e i minori enti locali, dall’altro, in una materia come quella dello sport alla quale non si sono rivolti molti approfondimenti dottrinali. Ma l’obiettivo primo si è necessariamente allargato in una prospettiva più ampia. Se, a seguito della riforma del Titolo V della Costituzione del 2001, l’ «ordinamento sportivo» è diventato materia di rilievo costituzionale (art. 117, comma 3°), è stato spontaneo tentare di verificare se e in che misura i vari filoni riformatori in materia, che sono venuti confluendo negli Statuti regionali di ‘nuova generazione’, si siano tradott…
Increasing the flexural capacity of RC beams using steel angles and pre-tensioned stainless steel ribbons
2016
This article presents an experimental programme on reinforced concrete beams retrofitted with steel angles and pre-stressed stainless steel ribbons to increase their flexural strength and ductility. Two different configurations of the steel ribbon were designed, and two companion specimens for each type considered were subjected to a four-point bending test to facilitate a direct comparison in the analysis of the effectiveness of the retrofitting technique. The influence of longitudinal steel angles and transverse stainless steel ribbons is analysed, and the concrete confinement due to stainless steel ribbons examined. The strengthened beams show remarkable increments in flexural strength a…
Validation of a Shear Model for RC and Hybrid Beams with Two Different Inclinations of Transversal Reinforcement
2016
The validation of an analytical model recently proposed for evaluation of the shear capacity in Reinforced Concrete (RC) beams containing multiple inclination of transverse stirrups is presented. The model is a suitable extension of that currently proposed in Eurocode 2 for the evaluation of the shear resistance, and it is derived by means of the the variable-inclination stressfield theory based on Nielsen’s plastic approach. Experimental and numerical data available in the literature on Hybrid Steel-Trussed Concrete Beams (HSTCBs) are used for model validation and result discussion. Finally, also the comparison with a different analytical approach for the assessment of the shear resistance…
The use of pumice lightweight concrete for masonry applications
2011
In the last two decades, the use of pumice as lightweight aggregate for concrete in structural applications has been the object of different studies. The aim was to find out if pumice can be an alternative to ordinary lightweight aggregate. The present paper is framed in this context. Here, a study is presented showing the use of pumice for making lightweight concrete units for masonry members. Through the paper, the formulation of a mix design for lightweight concrete is proposed. Then the obtained mechanical characteristics of the masonry units are discussed and compared to the code requirements. Reinforced bearing masonry walls, made with the concrete masonry units in question, were made…
Active disturbance rejection control of linear induction motor
2017
This paper proposes the theoretical framework and the experimental application of the active disturbance rejection control to linear induction motors. Such a nonlinear control (ADRC) technique can be viewed as a particular kind of input-output linearization control, where the nonlinear transformation of the state is not computed by means of the model, but it is estimated online. Such an approach permits to cope with unmodelling dynamics, as well as uncertainty in the knowledge of the model parameters and exogenous disturbances. The effectiveness of the proposed ADRC control law has been verified both by numerical simulations and experimentally on a suitably developed test setup. Moreover, t…
Surrogacy relationships: a critical interpretative review
2020
Abstract Based on a critical interpretative review of existing qualitative research investigating accounts of ‘lived experience’ of surrogates and intended parents from a relational perspective, this article proposes a typology of surrogacy arrangements. The review is based on the analysis of 39 articles, which belong to a range of different disciplines (mostly sociology, social psychology, anthropology, ethnology, and gender studies). The number of interviews in each study range from as few as seven to over one hundred. Countries covered include Australia, Canada, Greece, India, Iran, Israel, Italy, Mexico, Norway, Russia, Sweden, UK, Ukraine, and the USA. Most studies focus only on surrog…
Verb-Second and (micro)-variation in two Rhaeto-Romance varieties of Northern Italy.
2018
Rhaeto-Romance varieties are the only present-day Romance varieties which exhibit the Verb Second constraint (Benincà 1994, Poletto 2002, Salvi 2010). In this chapter we examine two properties typically ascribed to the Verb Second phenomenon, subject-finite verb inversion and restrictions on the co-occurrence of multiple constituents in the sentence-initial position, in two Rhaeto-Romance varieties spoken in South Tyrol (Province of Bolzano, Northern Italy). We demonstrate that both varieties behave like Verb-Second languages as far as both phenomena are concerned, but exhibit a specific Verb-Second system governed by the interplay between syntactic and discourse constraints which differs f…
Fundamentals of Precision Agriculture
2023
Precision agriculture or precision farming is the targeted application of crop input according to the locally determined crop needs. Therefore, it is the geo-referenced application of crop inputs, whose rates should be those required by the crop. The most essential points of information about the topic being described are: overview; brief history of precision agriculture; theoretical basics of precision agriculture; precision agriculture cycle; geo-referenced measurement of within-field parameters; analysis and interpretation of geo-referenced data for mapping within-field parameters; spatially variable rate application of crop inputs; instruments for precision agriculture; current scenario…
Medium-term effects of bisoprolol administration on renal hemodynamics and function in mild to moderate essential hypertension
2007
Arterial hypertension is a significant cause of end-stage renal failure; effective treatment of hypertensive patients reduces the rate of progression of this disorder. ss-Blockers, particularly nonselective agents, are associated with deterioration of renal function in patients with chronic renal failure. Previous studies on the interaction of the beta1-selective adrenergic antagonist bisoprolol with kidney function have been performed only acutely and over the short term. This study was designed to evaluate the antihypertensive efficacy and effects on renal hemodynamics and function of bisoprolol during medium-term (6 mo) treatment of patients with mild to moderate essential hypertension. …
Conciencia emocional, estados de ánimo y rendimiento académico
2017
Abstract.Emotional awareness is the basic emotional competence, which refers to individual differences in the way of being aware of the emotional functioning. Moods appear without specific reason, and are prolonged in time. Both are involved in multiple processes that modulate behavior and cognitive processes. Overall, the literature suggests a relationship between these variables and academic performance in school, however, is a contentious issue to be determined. The objective is to study the relationship of emotional awareness and moods academic performance. The participants were 1423 children, between 8-12 years old (M=9.88, SD=1.20), of both sexes (52.4 % girls) from Valencia. Particip…